A hydrodynamic ground source heat exchange buried pipe device and its usage method

Abstract

The present invention provides a hydrodynamic ground source heat exchange buried pipe device, including a shell, in which a hydrodynamic part and a functional part are arranged; in the hydrodynamic part, a water inlet thread connection is fixed to the upper part of the shell, and a U-shaped heat exchange pipe to be buried underground is connected to the water inlet thread connection; a protective pipe is arranged inside the shell, and the upper and lower parts of the protective pipe are respectively connected to the shell; a hydrodynamic turbine is arranged inside the protective pipe, and is fixed to the two ends of the protective pipe through an upper bearing and a lower bearing; the functional part includes a worm and a ground-breaking wheel rotating in opposite directions, the worm and the hydrodynamic turbine are arranged on the same main shaft, and the ground-breaking wheel is connected to the shell and meshes with the worm. At the same time, the present invention also provides a method for using the above-mentioned hydrodynamic ground source heat exchange buried pipe device; the hydrodynamic ground source heat exchange buried pipe device of the present invention is simple to operate, convenient to construct, low in cost and does not require recycling, and is suitable for various scenes where ground source heat pumps and air conditioning systems require buried pipes.

Description

Technical Field

[0001] The present invention relates to the technical field of ground source heat pump air conditioner installation, and in particular to a hydrodynamic ground source heat exchange buried pipe device and a use method thereof. Background Art

[0002] The development of clean new energy plays a vital role in solving energy shortage and environmental governance problems. Shallow geothermal energy is a clean energy with abundant reserves. The shallow surface temperature is basically constant all year round and is very close to the comfortable temperature required for building rooms. Geothermal energy can be used to meet the cooling and heating needs of buildings through heat pump technology. Ground source heat pump air conditioners have outstanding energy-saving properties in all uses of cooling and heating, and have broad development prospects.

[0003] During the application of the ground source heat pump air conditioner system, the way for the unit to exchange heat with the earth's soil is usually to bury a closed plastic pipe deep underground, fill the plastic pipe with water or antifreeze medium, and connect it to the heat pump unit in a closed loop, so that the medium circulates in a closed loop to exchange heat with the earth; currently, the installation of the system buried pipe is generally divided into two methods: horizontal buried pipe and vertical buried pipe. Among them, the horizontal buried pipe requires a large amount of earth excavation and occupies a large area, and the underground heat exchange is also affected by the climate change of the surface; vertical buried pipe is more widely used, but it requires heavy and large drilling machinery to drill a hole underground, and then lower the closed plastic pipe into the hole and backfill it; whether it is horizontal buried pipe or vertical buried pipe, since the installation cost of these two forms of buried pipe is relatively high, the overall initial installation cost of ground source heat pump air conditioner increases, which has become a bottleneck for the development of the ground source heat pump air conditioner industry and restricted its promotion. In addition, in the process of implementing buried pipe installation, it is easy to be constrained by the size of the site, with poor flexibility and great construction difficulty. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a hydrodynamic ground source heat exchange buried pipe device to reduce the overall initial installation cost of the ground source heat pump air conditioner and simplify the construction.

[0005] At the same time, the present invention also provides a method for using the above-mentioned hydrodynamic ground source heat exchange buried pipe device.

[0006] A hydrodynamic ground source heat exchange buried pipe device, characterized in that it comprises a shell, in which a hydrodynamic part and a functional part are arranged;

[0007] In the hydrodynamic part, a water inlet thread connection is fixed on the upper part of the shell, and a U-shaped heat exchange tube to be buried underground is connected to the water inlet thread connection; a protective tube is arranged inside the shell, and the upper and lower parts of the protective tube are respectively connected to the shell; a hydrodynamic turbine is arranged inside the protective tube, and is fixed to both ends of the protective tube through an upper bearing and a lower bearing;

[0008] The functional part comprises a worm and a breaking wheel rotating in opposite directions. The worm and the water power turbine are arranged on the same main shaft, and the breaking wheel is connected to the housing and meshed with the worm.

[0009] Furthermore, the upper bearing and the lower bearing are respectively connected between the casing and the turbine through brackets.

[0010] Furthermore, the earth-breaking wheel is a toothed gear made of steel.

[0011] At the same time, the present invention also provides a method for using the above-mentioned hydrodynamic ground source heat exchange buried pipe device, comprising the following steps:

[0012] The high-pressure water flow is connected to the U-shaped heat exchange tube, and then the high-pressure water flow flows to the hydrodynamic turbine through the water inlet thread, impacting the turbine to make it rotate, and driving the worm to rotate at the same speed. The worm bites the teeth on the earth-breaking wheel, causing the earth-breaking wheels on both sides to slow down and rotate in opposite directions. The rotating earth-breaking wheels crush the soil and sediment, and the soil and sediment are washed into muddy water by the water flow flowing onto the wheel, and return to the ground through the gap between the outer shell and the borehole, taking away the sediment to form space. The device continues to move downward by its own gravity, and at the same time, the U-shaped heat exchange tube connected to the water inlet thread is pulled downward and filled into the ground, and the backfilling is completed.

[0013] Working principle and beneficial effects of the present invention:

[0014] The hydrodynamic ground source heat exchange buried pipe device provided by the present invention uses high-pressure water as power. The impact of high-pressure water causes the turbine to generate rotational torque. The speed ratio of the number of teeth of the worm and the ground-breaking wheel reduces the rotation speed and increases the torque moment. In the vertical direction, the rotating ground-breaking wheel decomposes the horizontal torque of the hydrodynamic turbine when it rotates. The ground-breaking wheel crushes the mud and sand. The high-pressure water after the work then washes the crushed mud and sand into muddy water and brings it out of the ground, so that the device continues to move downward, and the U-shaped heat exchange pipe is pulled and buried underground. When the footage reaches the requirement, the buried pipe installation is completed by backfilling, so as to achieve the purpose of burying the ground source heat exchange pipe.

[0015] Compared with the hydrodynamic ground source heat exchange buried pipe device of the present invention, the traditional ground source heat pump heat exchange well is to drill a hole first and then lay the pipe, which has higher requirements on the ground hole: it cannot collapse and the pipe must be laid smoothly in the case of inevitable deflection, which has higher requirements on the drilling machinery and requires sufficient work to form a mud wall and a larger wellbore. In the present invention, the idea of ​​"one-time molding" is used to achieve the excavation of soil with a very small double U pipe section, and there is no need to consider the wall protection problem, thus saving a lot of work;

[0016] Furthermore, the application scenario of ground source heat pump air conditioning defines the underground geological conditions. The geological conditions should be soil and sand layers suitable for heat exchange, and the shallow geothermal utilization is only about 100 meters, without the need to chisel or break rocks. Therefore, the present invention has better effects when applied.

[0017] The hydrodynamic ground source heat exchange buried pipe device of the present invention is simple to operate, convenient to construct, low in cost and does not require recovery, and is suitable for various ground source heat pumps and air conditioning systems that require buried pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] In the figure: A. hydrodynamic part; B. functional part; 1. outer casing; 2. water inlet thread; 3. upper bearing; 4. turbine; 5. lower bearing; 6. worm; 7. earth-breaking wheel; 8. protective tube; 9. main shaft. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further explained below through specific implementation methods.

[0021] Example 1

[0022] Referring to the accompanying drawings, a hydrodynamic ground source heat exchange buried pipe device includes a shell 1, in which a hydrodynamic part A and a functional part B are arranged;

[0023] In the hydrodynamic part A, a water inlet thread 2 is fixed on the upper part of the shell 1, and the water inlet thread 2 is connected to the U-shaped heat exchange tube that needs to be buried underground; a protective tube 8 is arranged inside the shell 1, and the upper and lower parts of the protective tube 8 are respectively connected to the shell 1; a hydrodynamic turbine 4 is arranged in the protective tube 8, and the turbine 4 is fixed to the two ends of the protective tube 8 through an upper bearing 3 and a lower bearing 5, and the upper bearing 3 and the lower bearing 5 are respectively connected between the shell 1 and the turbine 4 through a bracket;

[0024] The functional part includes a worm 6 and a breaking wheel 7 rotating in opposite directions, wherein the breaking wheel 7 is a toothed gear, the worm 6 and the hydrodynamic turbine 4 are arranged on the same main shaft 9, and the breaking wheel 7 is connected to the housing 1 and meshes with the worm 6, and is made of steel.

[0025] Example 2

[0026] The working method of the hydrodynamic ground source heat exchange buried pipe device in Example 1 comprises the following steps:

[0027] The high-pressure water flow is connected to the U-shaped heat exchange tube, and then the high-pressure water flow flows to the hydrodynamic turbine 4 through the water inlet thread connection 2, impacting the turbine 4 to make it rotate, and driving the worm 6 to rotate at the same speed. The worm 6 bites the teeth on the earth-breaking wheel 7, so that the earth-breaking wheels 7 on both sides rotate in opposite directions at a reduced speed. The rotating earth-breaking wheels 7 crush the soil and silt, and the soil and silt are washed into muddy water by the water flow flowing onto the wheel, and return to the ground through the gap between the shell 1 and the borehole, taking away the silt to form a cavity. The device continues to move downward by its own gravity, and at the same time pulls the U-shaped heat exchange tube connected to the water inlet thread connection 2 downward and fills it into the ground; when the footage reaches the requirement, the buried pipe installation is completed by backfilling, so as to achieve the purpose of burying the ground source heat exchange tube.

Claims

1. A method for using a hydrodynamic ground source heat exchange buried pipe device, characterized in that: The hydrodynamic ground source heat exchange buried pipe device comprises a shell, in which a hydrodynamic part and a functional part are arranged; In the hydrodynamic part, a water inlet thread connection is fixed on the upper part of the shell, and a U-shaped heat exchange tube to be buried underground is connected to the water inlet thread connection; a protective tube is arranged inside the shell, and the upper and lower parts of the protective tube are respectively connected to the shell; a hydrodynamic turbine is arranged inside the protective tube, and is fixed to both ends of the protective tube through an upper bearing and a lower bearing; The functional part includes a worm and a ground-breaking wheel rotating in opposite directions, the worm and the water-powered turbine are arranged on the same main shaft, and the ground-breaking wheel is connected to the housing and meshes with the worm; The earth-breaking wheel is a toothed wheel made of steel; The method for using the hydrodynamic ground source heat exchange buried pipe device comprises the following steps: The high-pressure water flow is connected to the U-shaped heat exchange tube, and then the high-pressure water flow flows to the hydrodynamic turbine through the water inlet thread, impacting the turbine to make it rotate, and driving the worm to rotate at the same speed. The worm bites the teeth on the earth-breaking wheel, causing the earth-breaking wheels on both sides to slow down and rotate in opposite directions. The rotating earth-breaking wheels crush the soil and silt, and the soil and silt are washed into muddy water by the water flow flowing on the wheels, and return to the ground through the gap between the outer shell and the borehole, taking away the silt to form space. The device continues to move downward by its own gravity, and at the same time, the U-shaped heat exchange tube connected to the water inlet thread is pulled downward and filled into the ground, and the backfilling is completed.

2. The method for using a hydrodynamic ground source heat exchange buried pipe device according to claim 1, characterized in that: The upper bearing and the lower bearing are connected between the housing and the turbine through brackets respectively.

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