A hot water outlet device for deep underground heat exchanger

Abstract

The present invention is a hot water outlet device for a deep underground heat exchanger, comprising an upper ring body connected to an inner water intake pipe and a lower ring body located at the inner bottom of an outer pipe, the bottom surface of the lower ring body being placed at the bottom plugging end of the outer pipe, a plurality of vertical arc plates evenly distributed around the circumference being connected between the upper ring body and the lower ring body, the upper end of the arc plate being fixedly connected to the bottom surface of the upper ring body, the lower end being fixedly connected to the top surface of the lower ring body, the diameter of the upper ring body being smaller than the diameter of the lower ring body, the arc plate being a hyperbolic plate, and the middle portion of the arc plate being bent toward the direction of the axis of the upper ring body. The present invention has a simple structure, low cost, low flow resistance, a high outlet water temperature, meets water intake requirements, improves water intake effect, stabilizes the outlet pipe, and saves water intake electricity, achieving the purpose of energy-saving, efficient and safe water intake.

Description

Technical Field

[0001] The invention relates to the technical field of deep underground pipe heat exchangers, and in particular to a hot water outlet device for deep underground pipe heat exchangers. Background Art

[0002] The medium-deep rock heat exchanger is a device that indirectly extracts heat from underground soil, rock formations, and geothermal minerals. The heat energy deep underground is conducted by the heat exchanger and supplied to the surface buildings through a special equipment system. The medium-deep rock heat exchanger does not directly extract groundwater, and there is no problem of tailwater recharge. It extracts heat from hot rocks by heat exchange, replacing shallow source wells and medium-deep hot water wells.

[0003] The return water entering the deep-seated rock heat exchanger is gradually heated by the soil, hot fluid and rock outside the heat exchanger as it flows downward on the outside of the water intake inner pipe, reaching the highest temperature at the bottom. The water intake inner pipe made of insulation material guides the hot water out for heating users to use, forming a closed cycle.

[0004] The hot water is exported from the inner water intake pipe for use by heating users. The current method of evenly distributing holes on the water intake pipe has large water flow resistance and a relatively high relative length. The water intake pipe is prone to vibration when hot water is exported, affecting the safe use of the water intake pipe. In addition, the upper end is far away from the high-temperature section at the bottom, so it is easy to export water with a lower temperature, and the export of the hot water with the highest temperature at the bottom cannot be guaranteed, resulting in a lower heat exchange effect of the buried pipe heat exchanger and increased electricity costs. After using this device, the hot water with the highest temperature at the bottom is guaranteed to be safely and stably exported. Summary of the invention

[0005] The present invention aims to solve the deficiencies of the prior art and provides a hot water outlet device for a deep underground pipe heat exchanger.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a hot water outlet device for a deep buried pipe heat exchanger, comprising an upper ring body connected to a water intake inner pipe and a lower ring body located at the inner bottom of an outer pipe, the bottom surface of the lower ring body is placed on the bottom sealing end of the outer pipe, a plurality of circumferentially evenly distributed vertical arc plates are connected between the upper ring body and the lower ring body, the upper end of the arc plate is fixedly connected to the bottom surface of the upper ring body, and the lower end is fixedly connected to the top surface of the lower ring body, the diameter of the upper ring body is smaller than the diameter of the lower ring body, the arc plate is a hyperbolic plate, and the middle part of the arc plate is bent toward the direction of the axis of the upper ring body, and the bottom surface of the lower ring body is provided with a plurality of ground spikes for limiting, and the ground spikes are inserted into the bottom sealing end of the outer pipe.

[0007] The upper ring body and the lower ring body are coaxial.

[0008] The height of the upper ring body is 30 mm.

[0009] The height of the lower ring is 20 mm.

[0010] The diameter of the upper ring body is 110 mm.

[0011] The diameter of the lower ring is 178mm.

[0012] The height of the curved plate is 200 mm.

[0013] The ground spikes are in the shape of an inverted cone.

[0014] The number of ground spikes is 3, and the circumference is evenly distributed on the bottom surface of the lower ring body.

[0015] The distance between the outer wall of the lower ring body 2 and the inner wall of the outer tube 5 is 1 to 2 mm.

[0016] The beneficial effects of the present invention are: the present invention has a simple structure, low cost, small flow resistance, high outlet water temperature, meets water intake requirements, improves water intake effect, stabilizes the water outlet pipe, and saves water intake electricity, achieving the purpose of energy-saving, efficient and safe water intake. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a usage state diagram of the present invention;

[0019] In the figure: 1-upper ring body; 2-lower ring body; 3-arc plate; 4-inner water intake pipe; 5-outer pipe; 6-ground spike; 7-outlet pipe; 8-pressure relief valve; 9-exhaust valve; 10-flow equalizing plate; 11-inlet pipe;

[0020] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0022] like Figure 1-2 As shown, a hot water outlet device for a deep buried pipe heat exchanger comprises an upper ring body 1 for connecting to an inner water intake pipe 4 and a lower ring body 2 located at the inner bottom of an outer pipe 5, the bottom surface of the lower ring body 2 is placed on the bottom plugging end of the outer pipe 5, a plurality of circumferentially evenly distributed vertical arc plates 3 are connected between the upper ring body 1 and the lower ring body 2, the upper end of the arc plate 3 is fixedly connected to the bottom surface of the upper ring body 1, and the lower end is fixedly connected to the top surface of the lower ring body 2, the diameter of the upper ring body 1 is smaller than the diameter of the lower ring body 2, the arc plate 3 is a hyperbolic plate, and the middle part of the arc plate 3 is bent toward the axis of the upper ring body 1, and the bottom surface of the lower ring body 2 is provided with a plurality of ground spikes 6 for limiting, and the ground spikes 6 are inserted into the bottom plugging end of the outer pipe 5.

[0023] The upper ring body 1 and the lower ring body 2 are coaxial.

[0024] The height of the upper ring body 1 is 30 mm.

[0025] The height of the lower ring body 2 is 20 mm.

[0026] The diameter of the upper ring body 1 is 110 mm.

[0027] The diameter of the lower ring body 2 is 178 mm.

[0028] The height of the curved plate 3 is 200 mm.

[0029] The ground spikes 6 are in the shape of an inverted cone, the number of ground spikes 6 is 3, and the circumference is evenly distributed on the bottom surface of the lower ring body 2. The spacing between the outer wall of the lower ring body 2 and the inner wall of the outer tube 5 is 1 to 2 mm, which is convenient for the inner water intake tube 4 to be smoothly placed at the bottom of the outer tube 5, and plays a role in positioning the present invention in the outer tube 5, and prevents the inner water intake tube 4 from vibrating greatly. The provision of the ground spikes 6 can firmly fix the present invention at the plugging end of the outer tube 5, further preventing the inner water intake tube 4 from vibrating greatly. During the construction of the bottom of the outer tube 5, cementing materials are generally used for plugging, and the plugging formed by the cementing materials is not dry, which facilitates the insertion of the ground spikes 6.

[0030] When the present invention is working, the present invention provides a hot water export device for a deep buried pipe heat exchanger. The device has a simple structure and low cost. The gap between two adjacent arc plates 3 is large, and the arc plate 3 is a hyperbola. The arc plate 3 with a hyperbola shape has small resistance, so the flow resistance is small, which is more than 3000Pa lower than the resistance of the existing water intake inner pipe 4 uniformly distributed hole method. The outlet water temperature is higher, which is more than 4°C higher than the existing water intake inner pipe 4 uniformly distributed hole method. Since the present invention can realize low-point water intake, the outlet water temperature is higher, which meets the water intake requirements, improves the water intake effect, stabilizes the water outlet pipe 7, and saves water intake electricity, achieving the purpose of energy-saving, efficient and safe water intake.

[0031] Example 1

[0032] A hot water outlet device for a deep underground heat exchanger comprises an upper ring body 1 connected to an inner water intake pipe 4 and a lower ring body 2 located at the inner bottom of an outer pipe 5, wherein the upper ring body 1 and the lower ring body 2 are coaxial. The bottom surface of the lower ring body 2 is fitted with the bottom plugging end of the outer pipe 5, and a plurality of vertical arc plates 3 evenly distributed around the circumference are connected between the upper ring body 1 and the lower ring body 2, wherein the upper end of the arc plate 3 is fixedly connected to the bottom surface of the upper ring body 1, and the lower end is fixedly connected to the top surface of the lower ring body 2, the diameter of the upper ring body 1 is smaller than the diameter of the lower ring body 2, the arc plate 3 is a hyperbolic plate, and the middle part of the arc plate 3 is bent toward the direction of the axis of the upper ring body 1, the ground spikes 6 are inverted cones, the number of the ground spikes 6 is 3, and the ground spikes 6 are evenly distributed around the bottom surface of the lower ring body 2, and the spacing between the outer wall of the lower ring body 2 and the inner wall of the outer pipe 5 is 1 to 2 mm.

[0033] like Figure 2As shown, the present invention is installed at the bottom of the water intake inner tube 4, the top surface of the upper ring body 1 is connected to the lower end of the water intake inner tube 4, the water intake inner tube 4 is located in the outer tube 5, the lower end of the outer tube 5 is blocked, and the lower ring body 2 is fitted with the bottom of the outer tube 5. Since the diameter of the lower ring body 2 is larger than the diameter of the upper ring body 1, the stability of the present invention when supporting the water intake inner tube 4 is increased, the upper end of the water intake inner tube 4 is connected to the water outlet pipe 7, and the water inlet pipe 11 for water intake is connected to the cavity formed between the outer tube 5 and the water intake inner tube 4, the water inlet pipe 11 and the water outlet pipe 7 are both provided with switch valves, and the water outlet pipe 7 is installed with a water pump, the top of the outer tube 5 is provided with a head, and the head is installed with a pressure relief valve 8 and an exhaust valve 9, the outer tube 5 is exhausted and pressure-relieved in time, which is beneficial to increase the temperature of the water in the outer tube 5.

[0034] When the present invention is working, the outlet end of the water inlet pipe 11 is located above the flow equalizing plate 10, and the water with lower temperature enters the cavity formed between the outer tube 5 and the water intake inner tube 4 through the water inlet pipe 11. In the process of flowing downward in the cavity, the water is gradually heated by the soil, hot fluid and rock outside the outer tube 5, and reaches the highest temperature when it reaches the bottom of the outer tube 5. The water with higher temperature flows into the water intake inner tube 4 through the present invention, and the water pump works to pump the hot water in the water intake inner tube 4 into the water outlet pipe 7, and flows out through the water outlet pipe 7 to be used by heating users.

[0035] Example 2

[0036] A hot water outlet device for a deep underground heat exchanger comprises an upper ring body 1 connected to an inner water intake pipe 4 and a lower ring body 2 located at the inner bottom of an outer pipe 5, the bottom surface of the lower ring body 2 is fitted with the bottom plugging end of the outer pipe 5, three circumferentially evenly distributed vertical arc plates 3 are connected between the upper ring body 1 and the lower ring body 2, the upper end of the arc plate 3 is fixedly connected to the bottom surface of the upper ring body 1, and the lower end is fixedly connected to the top surface of the lower ring body 2, the diameter of the upper ring body 1 is smaller than the diameter of the lower ring body 2, the arc plate 3 is a hyperbolic plate, and the middle part of the arc plate 3 is bent toward the axis of the upper ring body 1, the ground spikes 6 are inverted cones, the number of the ground spikes 6 is 3, and the circumference is evenly distributed on the bottom surface of the lower ring body 2, and the spacing between the outer wall of the lower ring body 2 and the inner wall of the outer pipe 5 is 1 to 2 mm.

[0037] The upper ring body 1 and the lower ring body 2 are coaxial.

[0038] The height of the upper ring body 1 is 30 mm.

[0039] The height of the lower ring body 2 is 20 mm.

[0040] The diameter of the upper ring body 1 is 110 mm.

[0041] The diameter of the lower ring body 2 is 178 mm.

[0042] The height of the curved plate 3 is 200 mm.

[0043] Example 3

[0044] A hot water outlet device for a deep underground heat exchanger comprises an upper ring body 1 connected to an inner water intake pipe 4 and a lower ring body 2 located at the inner bottom of an outer pipe 5, wherein the upper ring body 1 and the lower ring body 2 are coaxial. The bottom surface of the lower ring body 2 is fitted with the bottom plugging end of the outer pipe 5, and three vertical arc plates 3 evenly distributed around the circumference are connected between the upper ring body 1 and the lower ring body 2. The upper end of the arc plate 3 is fixedly connected to the bottom surface of the upper ring body 1, and the lower end is fixedly connected to the top surface of the lower ring body 2. The diameter of the upper ring body 1 is smaller than the diameter of the lower ring body 2. The arc plate 3 is a hyperbolic plate, and the middle part of the arc plate 3 is bent toward the direction of the axis of the upper ring body 1. The ground spikes 6 are inverted cones, and the number of the ground spikes 6 is 3, and they are evenly distributed around the bottom surface of the lower ring body 2.

[0045] like Figure 2 As shown, the present invention is installed at the bottom of the water intake inner tube 4, the top surface of the upper ring body 1 is connected to the lower end of the water intake inner tube 4, the water intake inner tube 4 is located in the outer tube 5, the lower end of the outer tube 5 is blocked, and the lower ring body 2 fits with the bottom of the outer tube 5. Since the diameter of the lower ring body 2 is larger than the diameter of the upper ring body 1, the stability of the present invention when supporting the water intake inner tube 4 is increased. A flow equalizing plate 10 is installed in the outer tube 5, and the flow equalizing plate 10 is fixedly connected to the inner wall of the outer tube 5. The water outlet end of the water inlet pipe 11 is located above the flow equalizing plate 10, and the upper end of the water intake inner tube 4 passes through the flow equalizing plate 10 to be connected to the water outlet pipe 7. The water inlet pipe 11 for water intake is connected to the cavity formed between the outer tube 5 and the water intake inner tube 4, and the return water enters the outer tube 5 through the flow equalizing plate 10. Switch valves are provided on the water inlet pipe 11 and the water outlet pipe 7, and a water pump is installed on the water outlet pipe 7. A head is provided at the end, and a pressure relief valve 8 and an exhaust valve 9 are installed on the head. The outer tube 5 is vented and pressure-relieved in time, which is beneficial to increasing the temperature of the water in the outer tube 5. When the present invention is working, water with a relatively low temperature enters the cavity formed between the outer tube 5 and the water intake inner tube 4 through the water inlet pipe 11. In the process of flowing downward in the cavity, it is gradually heated by the soil, hot fluid and rock outside the outer tube 5. When it reaches the bottom of the outer tube 5, it reaches the highest temperature. The water with a relatively high temperature flows into the water intake inner tube 4 through the present invention. The water pump works, and then the hot water in the water intake inner tube 4 is pumped into the water outlet pipe 7, and flows out through the water outlet pipe 7 to be used by heating users.

[0046] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A hot water outlet device for a deep underground heat exchanger, characterized in that: It comprises an upper ring body (1) for connecting with an inner water intake pipe (4) and a lower ring body (2) located at the inner bottom of an outer pipe (5), the bottom surface of the lower ring body (2) is placed at the bottom blocking end of the outer pipe (5), a plurality of vertical arc plates (3) evenly distributed around the circumference are connected between the upper ring body (1) and the lower ring body (2), the upper end of the arc plate (3) is fixedly connected to the bottom surface of the upper ring body (1), and the lower end is fixedly connected to the top surface of the lower ring body (2), the diameter of the upper ring body (1) is smaller than the diameter of the lower ring body (2), the arc plate (3) is a hyperbolic plate, and the middle part of the arc plate (3) is bent in the direction of the axis of the upper ring body (1), and the bottom surface of the lower ring body (2) is provided with a plurality of ground spikes (6) for limiting, and the ground spikes (6) are inserted into the bottom blocking end of the outer pipe (5); The upper ring body (1) and the lower ring body (2) are coaxial; the ground spikes (6) are in the shape of an inverted cone; the number of the ground spikes (6) is 3 and the circumference is evenly distributed on the bottom surface of the lower ring body (2); the distance between the outer wall of the lower ring body (2) and the inner wall of the outer tube (5) is 1 to 2 mm.

2. The hot water outlet device for deep underground heat exchanger according to claim 1, characterized in that: The height of the upper ring body (1) is 30 mm.

3. The hot water outlet device for deep underground heat exchanger according to claim 1, characterized in that: The height of the lower ring body (2) is 20 mm.

4. The hot water outlet device for deep underground heat exchanger according to claim 1, characterized in that: The diameter of the upper ring body (1) is 110 mm.

5. The hot water outlet device for deep underground heat exchanger according to claim 1, characterized in that: The diameter of the lower ring body (2) is 178 mm.

6. The hot water outlet device for deep underground heat exchanger according to claim 1, characterized in that: The height of the curved plate (3) is 200 mm.

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