Heat exchange loop buried pipe construction mechanism in underground structure

Abstract

The utility model relates to the technical field of underground structure horizontal heat exchange pipe burying, in particular to a heat exchange loop buried pipe construction mechanism in an underground structure. Comprising a temporary fixing frame, a balancing weight and a circular protective layer plastic cushion block, the temporary fixing frame comprises three scaffold steel pipes and steel bars welded between the steel pipes, the scaffold steel pipes are arranged in a triangular shape according to the pipeline turning amplitude, and steel plates are welded to bottom openings of the steel pipes for plugging; the reinforcing steel bars surround the scaffold steel pipe to form a triangular framework, a wood plate is installed on the triangular framework, and a balancing weight is placed on the triangular framework; the scaffold steel pipes at the top corners of the scaffold steel pipes cling to the inner sides of the bent arcs at the corners of the horizontal heat exchange pipes, and the scaffold steel pipes at the bottom corners cling to the outer sides of the long linear sections of the horizontal heat exchange pipes. Under the condition that the waterproof roll structure layer is not damaged, the waterproof roll structure has the advantages that the concrete protection layer is formed through one-time pouring, the construction period is short, the speed is high, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of burying horizontal heat exchange pipes in underground structures, in particular to a construction mechanism for buried heat exchange loop pipes in underground structures. Background Art

[0002] Taking advantage of the relatively stable nature of the underground soil, the heat from the low-level heat source is transferred to the place where heating or heating is needed in winter, and the waste heat in the room is transferred to the low-level heat source in summer to achieve the purpose of cooling or refrigeration. The horizontal heat exchange pipes containing water circulation medium in the concrete protective layer under the structural bottom plate form a heat transfer system with the surrounding soil. Concrete is used as the backfill material for the heat transfer pipe, which has high density, better contact with the ground, small contact thermal resistance, and higher heat transfer and exchange efficiency.

[0003] In such Figure 1 In the method of installing horizontal heat exchange tubes, in order to protect the overall waterproof ability of the waterproof layer, the horizontal heat exchange tubes cannot be fixed with staples on the waterproof membrane structure layer.

[0004] The traditional solution is to pour the concrete protective layer in two times. Half of the thickness of the concrete protective layer is poured on the waterproof membrane structure layer. After the concrete strength is met, high-density polyethylene heat exchange pipes for heat transfer are laid on the surface. The pipelines are arranged horizontally, and the turns are spiraled using the natural bending method. The ports extend out of the concrete protective layer and penetrate into the structural base plate. The pipes are fixed with staples. This method requires two times of concrete pouring and curing, takes 4 days to complete, and has high costs and low construction efficiency. Utility Model Content

[0005] The utility model aims to solve the problem of secondary pouring of the concrete protective layer of the buried horizontal heat exchange pipe caused by the limitation of the waterproof layer, and provides a heat exchange loop buried pipe construction mechanism in the underground structure to improve the work efficiency.

[0006] The technical solution adopted by the utility model to solve the above problems is:

[0007] A construction mechanism for buried pipes in a heat exchange loop in an underground structure, characterized in that it includes a temporary fixing frame, a counterweight block and a circular protective layer plastic pad, the temporary fixing frame includes three scaffolding steel pipes and steel bars welded between the steel pipes, the scaffolding steel pipes are arranged in a triangle according to the turning amplitude of the pipeline, and the bottom of the steel pipes is welded with a steel plate for sealing; the steel bars form a triangular frame around the scaffolding steel pipes, wooden boards are installed on the triangular frame, and counterweight blocks are placed; the scaffolding steel pipes at the top corners of the scaffolding steel pipes are close to the inner side of the curved arc at the turning point of the horizontal heat exchange pipe, and the scaffolding steel pipes at the bottom corners are close to the outer side of the long straight section of the horizontal heat exchange pipe.

[0008] The triangular structure includes two groups of outer ring steel bars arranged outside the scaffolding steel pipe and a group of inner ring steel bars arranged inside the scaffolding steel pipe. The uppermost group of outer ring steel bars forms a horizontal plane, on which wooden boards are installed and counterweights are placed.

[0009] The scaffolding steel pipe has an outer diameter of 48 mm and a wall thickness of 3.5 mm. Its length is 150 mm greater than the thickness of the concrete protective layer. The steel bars are selected to have a diameter greater than 12 mm. The upper and lower spacing between the two sets of outer ring steel bars is 100 mm.

[0010] The horizontal heat exchange tube is a small-diameter polyethylene tube with a diameter of 25 mm. The counterweight block is a concrete strength test block with a weight of 8.2 kg. The outer diameter of the circular protective layer plastic pad is 20 mm less than the thickness of the concrete protective layer, and the diameter of the inner clamping ring is slightly larger than the outer diameter of the horizontal heat exchange tube by 5 mm.

[0011] The beneficial effects of the utility model are as follows: the utility model fixes the horizontal heat exchange tube in the concrete protective layer on the waterproof layer by means of a temporary fixing frame, a counterweight block and a circular protective layer plastic pad, which can well solve the problem that the concrete protective layer must be poured twice, making the horizontally laid heat exchange tube more convenient for construction, and ensuring that the horizontal heat exchange tube can exchange heat with the concrete layer and the soil, thereby ensuring the cold and heat obtained by the circulating water for cooling in summer and heating in winter in the house.

[0012] The utility model uses common materials to make a temporary fixing frame. The circular protective layer plastic pads are mostly used for the construction of steel bar protective layers. They are easy to make and purchase, and no machinery or equipment is required during the process. The utility model has high safety. At the same time, it saves the time for template installation and concrete pouring, facilitates the installation of on-site pipelines, improves the turnover rate of the temporary fixing frame, and simplifies the installation process of horizontal heat exchange pipes in concrete.

[0013] The utility model temporary fixing frame and circular protective layer plastic pad have the characteristics of light weight, convenient installation and disassembly, no need for machinery and tools, temporary fixing frame can be used in a turnover manner, fast construction efficiency, good economy, green and environmentally friendly materials, etc. The temporary fixing frame and circular protective layer plastic pad device are safe and reliable, and the direction and position of the pipeline can be adjusted relatively flexibly, which can prevent damage to the waterproof structure of the bottom layer. The concrete protective layer can be poured in one time, reducing the workload of template installation, efficient construction, improving economic benefits and work efficiency, and has broad prospects for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of laying heat exchange pipelines in the concrete protective layer under the existing structure base plate.

[0015] Figure 2 It is a schematic diagram of the installation and fixation of the utility model.

[0016] Figure 3 It is a schematic diagram of a temporary fixing frame of the utility model.

[0017] Figure 4 It is a schematic diagram of the counterweight of the temporary fixing frame of the utility model.

[0018] In the figure: 1-horizontal heat exchange tube, 11-concrete protective layer, 12-waterproof membrane structural layer, 13-C20 plain concrete cushion layer, 14-rock and soil, 15-nail, 16-structural bottom plate, 2-temporary fixing frame, 21-scaffolding steel pipe, 22-steel plate, 23-rebar, 24-wooden board, 3-counterweight block, 4-circular protective layer plastic pad. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the embodiments and drawings. Example 1

[0020] like Figure 3-Figure 4 As shown, the present embodiment discloses a heat exchange loop buried pipe construction mechanism in an underground structure, including a temporary fixing frame 2, a counterweight block 3 and a circular protective layer plastic pad 4, wherein the temporary fixing frame 2 includes three scaffolding steel pipes 21 and steel bars 23 welded between the steel pipes, wherein the scaffolding steel pipes 21 are arranged in a triangle according to the turning amplitude of the pipeline, and the bottom of the steel pipes are welded with a steel plate 22 for blocking; the steel bars 23 form a triangular structure around the scaffolding steel pipes 21, and the triangular structure includes two groups of outer ring steel bars arranged on the outside of the scaffolding steel pipes 21 and a group of inner ring steel bars arranged on the inside of the scaffolding steel pipes 21, and the top group of outer ring steel bars constitutes a horizontal plane, on which a wooden board 24 is installed, and a counterweight block 3 is placed; the scaffolding steel pipes 21 at the top corners of the scaffolding steel pipes 21 are close to the inner side of the curved arc at the turning point of the horizontal heat exchange pipe 1, and the scaffolding steel pipes 21 at the bottom corners are close to the outer side of the long straight section of the horizontal heat exchange pipe 1.

[0021] The scaffolding steel pipe 21 is a steel pipe with an outer diameter of 48mm and a wall thickness of 3.5mm. Its length is 150mm greater than the thickness of the concrete protective layer 11. The steel bars 23 are steel bars with a diameter greater than 12mm. The upper and lower spacing of the two sets of outer ring steel bars is 100mm. The counterweight block 3 is a concrete strength test block with a weight of 8.2kg.

[0022] The outer diameter of the circular protective layer plastic pad 4 is 20 mm smaller than the thickness of the concrete protective layer 11 , and the diameter of the inner clamping ring is slightly larger than the outer diameter of the horizontal heat exchange tube 1 by 5 mm. Example 2

[0023] This embodiment uses the mechanism disclosed in Example 1 to disclose a method for constructing a buried pipe for a heat exchange loop in an underground structure. Figure 2As shown, the horizontal heat exchange tube 1 is fixed in the concrete protective layer 11 on the upper part of the waterproof membrane structure layer 12 by means of a temporary fixing frame 2, a counterweight block 3, and a circular protective layer plastic pad 4. After verifying the position of the pipeline, a concrete protective layer is poured once, and the horizontal heat exchange tube 1 is buried in the concrete. When the concrete reaches a certain strength, the temporary fixing frame 2, the counterweight block 3, and the circular protective layer plastic pad 4 are removed.

[0024] The construction method specifically comprises the following steps:

[0025] S1. The surveyor measures the position and turning point of the small-diameter horizontal heat exchange tube 1 on the laid waterproof coiled material structure layer 12;

[0026] S2, the pipe installation control line is laid on the waterproof coiled material structure layer 12, and the turning point is fixed with a temporary fixing frame 2 and a counterweight block 3. The steel pipe of the temporary fixing frame 2 is coated with a release agent or wrapped with a geotextile as an isolation layer for easy removal later; the temporary fixing frame 2 is a triangular structure, and the horizontal heat exchange tube 1 is bent into the designed size by external support at the top angle and internal pressure at the bottom angle; the horizontal heat exchange tube 1 in this embodiment has only one turning point in each direction, and the scaffolding steel pipe 21 at the top angle is close to the inner side of the curved arc at the turning point of the horizontal heat exchange tube 1, and the two scaffolding steel pipes 21 at the bottom angle are close to the outer side of the long straight section of the horizontal heat exchange tube 1;

[0027] S3. Install circular protective plastic pads 4 on the horizontal heat exchange tube 1 to suspend the horizontal heat exchange tube 1 for easy concrete wrapping. The pad spacing is 1m.

[0028] S4, check the position of the pipeline, pour the concrete protective layer, and bury the horizontal heat exchange tube 1 in the concrete;

[0029] S5. When the concrete strength reaches 2.5 MPa, remove the temporary fixing frame 2 and the counterweight block 3. Example 3

[0030] The steps of the underground pipe construction method for a heat exchange loop in an underground structure described in this embodiment are the same as those in Embodiment 2, except that:

[0031] There are two bends in each direction of the horizontal heat exchange tube 1, and there is a short straight segment between the curved arcs at the two bends; a temporary fixing frame 2 is set at each bend, and the scaffolding steel pipe 21 at the top corner of each temporary fixing frame 2 is close to the inner side of the curved arc at each bend of the horizontal heat exchange tube 1, and is located at the intersection of the short straight segment and each curved arc, a scaffolding steel pipe 21 at the bottom corner close to the long straight segment is close to the outer side of the long straight segment of the horizontal heat exchange tube 1, and the scaffolding steel pipe 21 at the other bottom corner does not contact the horizontal heat exchange tube 1.

[0032] The utility model provides a buried pipe construction mechanism for a heat exchange loop in an underground structure, which can achieve simple operation and low cost while meeting construction requirements and accuracy, and avoids tedious secondary template installation and concrete pouring operations, thereby simplifying the original fixed procedures and greatly improving the construction progress of underground heat exchange pipelines.

[0033] The above is only a preferred embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and utility model concept of the utility model within the technical scope disclosed by the utility model, which should be covered by the protection scope of the utility model.

Claims

1. A heat exchange loop buried pipe construction mechanism in an underground structure, characterized in that: The invention comprises a temporary fixing frame (2), a counterweight (3) and a circular protective layer plastic pad (4); the temporary fixing frame (2) comprises three scaffolding steel pipes (21) and steel bars (23) welded between the steel pipes; the scaffolding steel pipes (21) are arranged in a triangle according to the turning range of the pipeline, and the bottom of the steel pipes is welded with a steel plate (22) for blocking; the steel bars (23) surround the scaffolding steel pipes (21) to form a triangular structure; a wooden board (24) is installed on the triangular structure, and a counterweight (3) is placed; the scaffolding steel pipes (21) at the top corners are closely attached to the inner side of the curved arc at the turning point of the horizontal heat exchange pipe (1), and the scaffolding steel pipes (21) at the bottom corners are closely attached to the outer side of the long straight section of the horizontal heat exchange pipe (1).

2. The heat exchange loop buried pipe construction mechanism in an underground structure according to claim 1, characterized in that: The triangular structure comprises two groups of outer ring steel bars arranged outside the scaffolding steel pipe (21) and a group of inner ring steel bars arranged inside the scaffolding steel pipe (21), and the uppermost group of outer ring steel bars forms a horizontal plane, on which a wooden board (24) is installed and a counterweight block (3) is placed.

3. The heat exchange loop buried pipe construction mechanism in an underground structure according to claim 2, characterized in that: The scaffolding steel pipe (21) has an outer diameter of 48 mm and a wall thickness of 3.5 mm. Its length is 150 mm greater than the thickness of the concrete protective layer (11). The steel bars (23) are selected to have a diameter greater than 12 mm. The upper and lower spacing between the two sets of outer ring steel bars is 100 mm.

4. A heat exchange loop buried pipe construction mechanism in an underground structure according to any one of claims 1 to 3, characterized in that: The horizontal heat exchange tube (1) is a small-diameter polyethylene tube with a diameter of 25 mm. The counterweight block (3) is a concrete strength test block with a weight of 8.2 kg. The outer diameter of the circular protective layer plastic pad (4) is 20 mm less than the thickness of the concrete protective layer (11), and the inner clamping ring has a diameter that is 5 mm greater than the outer diameter of the horizontal heat exchange tube (1).

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