Geothermal well in-situ closed type water circulation heat exchange intensity tester

Abstract

The utility model provides a geothermal well in-situ closed type water circulation heat exchange intensity tester, and relates to the technical field of geothermal test.The geothermal well in-situ closed type water circulation heat exchange intensity tester is provided with a first protection box and a second protection box, a first testing part is arranged in the first protection box, and a second testing part is arranged in the second protection box; the characteristic that the first protection box and the second protection box are arranged in a separable mode enables the first testing part and the second testing part to be separated, the geothermal wells with different calibers can be adapted through the first testing part and the second testing part which are arranged in a separable mode, and when the calibers of the geothermal wells are small, the first protection box and the second protection box do not need to be separated; the operation process is simplified; when the caliber of the geothermal well is large, the first protection box and the second protection box can be separated, so that the first testing part and the second testing part can be arranged on the two sides of the geothermal well respectively, and the detection accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of geothermal testing technology, and more specifically, to a geothermal well in-situ closed-loop water circulation heat exchange intensity tester. Background Technology

[0002] With the increasing global demand for renewable energy, geothermal energy, as a clean and sustainable energy form, has received widespread attention and development. As a key facility for the development and utilization of geothermal energy, the heat exchange efficiency of geothermal wells directly affects the extraction and utilization of geothermal energy. In order to accurately evaluate the heat exchange performance of geothermal wells, it is necessary to measure the heat exchange intensity of water circulation in the geothermal wells by measuring the change in heat, i.e., calorimetry, such as by measuring specific heat or thermal conductivity.

[0003] Currently, most existing geothermal well heat exchange intensity testing equipment on the market suffers from poor adaptability. Especially when dealing with geothermal wells of different diameters, existing equipment often struggles to flexibly adjust testing methods, leading to inaccurate results. Therefore, we have made improvements by proposing an in-situ closed-loop water circulation heat exchange intensity tester for geothermal wells. Utility Model Content

[0004] This utility model provides an in-situ closed-loop water circulation heat exchange intensity tester for geothermal wells, including a first protective box and a second protective box placed on top of the first protective box. Several limiting posts are fixedly installed at the bottom of the second protective box, and several limiting grooves are opened at the top of the first protective box. The limiting grooves are inserted into the outer surface of the limiting posts. Baffles are fixedly installed on the sides of both the second and first protective boxes. A protective cover is also installed on the side of the first protective box through a damping hinge. The baffles are inserted into the inner wall of the protective cover.

[0005] The first protective box contains a first testing unit, and the second protective box contains a second testing unit. The first testing unit includes a water pump installed inside the first protective box. The outlet of the water pump is connected to a first temperature sensor, the first temperature sensor is connected to a first flow meter, and the first flow meter is connected to a first connecting pipe. One end of the first connecting pipe extends out from the side of the first protective box and is connected to a first external threaded connector. The second testing unit includes a second connecting pipe installed inside the second protective box. One end of the second connecting pipe extends out from the side of the second protective box and is connected to a second external threaded connector. Both the second and first external threaded connectors are located inside a protective cover.

[0006] As a preferred technical solution of this application, the second test section further includes a second temperature sensor connected to the end of the second connecting pipe away from the second external threaded joint. The second temperature sensor is connected to a second flow meter, and the second flow meter is connected to a discharge pipe. One end of the discharge pipe passes through the second protective box and extends from the back of the second protective box to the outside of the second protective box.

[0007] As a preferred technical solution of this application, a second touch screen is installed on the inner wall of the second protective box, and a second controller is provided on the back of the second touch screen. The second touch screen, the second flow meter and the second temperature sensor are all connected to the second controller.

[0008] As a preferred technical solution of this application, a first touch screen is installed on the inner wall of the first protective box, and a first controller is provided on the back of the first touch screen. The first temperature sensor, the first flow meter and the first touch screen are all connected to the first controller.

[0009] As a preferred technical solution of this application, a water tank located on one side of the second protective box is fixedly installed on the top of the first protective box, and a buckle is provided between the top of the water tank and the top of the second protective box.

[0010] As a preferred technical solution of this application, the top of the water tank is provided with a through hole, the inlet of the water pump is connected to a delivery pipe, one end of the delivery pipe passes through the first protective box and the through hole and extends into the water tank, and the top of the water tank is also provided with a ventilation hole.

[0011] As a preferred technical solution of this application, a limiting rod is fixedly installed on the top of the second protective box. A reel is sleeved on the outer surface of the limiting rod, and a heat exchange tube is wound on the reel. Both ends of the heat exchange tube are connected to internal threaded joints.

[0012] As a preferred technical solution of this application, the front of the second protective box is hinged to have a second door, and the second door is provided with a transparent window. A buckle is also provided between the second door and the second protective box.

[0013] As a preferred technical solution of this application, the front of the first protective box is hinged to have a first door, and the first door is also provided with a transparent window. A buckle is also provided between the first door and the first protective box.

[0014] As a preferred technical solution of this application, a handle is fixedly installed on the top of the first protective box, and wheels are installed on the bottom of the first protective box.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In the scheme of this application:

[0017] This application utilizes a first protective box and a second protective box. The first protective box houses a first testing unit, while the second protective box houses a second testing unit. The detachable nature of the first and second protective boxes allows for the separation of the first and second testing units. This detachable design accommodates geothermal wells of different diameters. When the geothermal well diameter is small, there is no need to separate the first and second protective boxes, simplifying the operation. When the geothermal well diameter is large, the first and second protective boxes can be separated, allowing the first and second testing units to be placed on opposite sides of the geothermal well, thus improving the accuracy of the testing. Attached Figure Description

[0018] Figure 1 A schematic diagram of the in-situ closed-loop water circulation heat exchange intensity tester for geothermal wells provided in this application;

[0019] Figure 2 A schematic diagram of the structure of the protective cover provided in this application after it is opened;

[0020] Figure 3 Provided for this application Figure 2 A front view structural diagram;

[0021] Figure 4 This is a schematic diagram of the structure of the limiting groove provided in this application;

[0022] Figure 5 A schematic diagram of the limiting column provided in this application.

[0023] The image shows:

[0024] 1. First protective box; 101. Wheels; 102. Handle; 103. First box door; 2. First testing section; 201. Water pump; 202. Delivery pipe; 203. First temperature sensor; 204. First flow meter; 205. First connecting pipe; 206. First external threaded connector; 207. First touch screen; 3. Second protective box; 301. Limiting post; 302. Limiting groove; 303. Second box door; 4. Second testing section; 401. Second connecting pipe; 402. Second external threaded connector; 403. Second temperature sensor; 404. Second flow meter; 405. Discharge pipe; 406. Second touch screen; 5. Water tank; 6. Limiting rod; 7. Reel; 701. Heat exchange tube; 702. Internal threaded connector; 8. Baffle; 9. Protective cover. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0026] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] For an example, please refer to... Figures 1-5 A geothermal well in-situ closed-loop water circulation heat exchange intensity tester includes a first protective box 1 and a second protective box 3 placed on top of the first protective box 1. Several limiting posts 301 are fixedly installed at the bottom of the second protective box 3. Several limiting grooves 302 are opened at the top of the first protective box 1, and the limiting grooves 302 are inserted into the outer surface of the limiting posts 301. Baffles 8 are fixedly installed on the sides of both the second protective box 3 and the first protective box 1. A protective cover 9 is also installed on the side of the first protective box 1 through a damping hinge. The baffles 8 are inserted into the inner wall of the protective cover 9. The protective cover 9 and the two baffles 8 cooperate with each other to limit the first protective box 1 and the second protective box 3, thereby improving the stability between the first protective box 1 and the second protective box 3. Opening the protective cover 9 can release the limitation between the protective cover 9 and the baffles 8.

[0029] The first protective box 1 contains a first testing unit 2, and the second protective box 3 contains a second testing unit 4. The separable nature of the first and second protective boxes 1 and 3 allows the first testing unit 2 and the second testing unit 4 to also be separated. This separable arrangement of the first and second testing units 2 and 4 allows for adaptation to geothermal wells of different diameters. When the geothermal well diameter is small, there is no need to separate the first and second protective boxes 1 and 3, simplifying the operation. When the geothermal well diameter is large, the first and second protective boxes 1 and 3 can be separated, allowing the first testing unit 2 and the second testing unit 4 to be placed on opposite sides of the geothermal well, improving the accuracy of the test. Because in large-diameter geothermal wells, due to the larger internal space, the water flow and heat exchange processes may be more complex, resulting in significant temperature gradients. If the first protective box 1 and the first testing unit 2 are too close together, the measured temperature may not be accurate.

[0030] The first testing unit 2 includes a water pump 201 installed inside the first protective box 1. The outlet of the water pump 201 is connected to a first temperature sensor 203. The first temperature sensor 203 is connected to a first flow meter 204. The first flow meter 204 is connected to a first connecting pipe 205. One end of the first connecting pipe 205 extends out from the side of the first protective box 1 and is connected to a first external threaded connector 206. The second testing unit 4 includes a second connecting pipe 401 installed inside the second protective box 3. One end of the second connecting pipe 401 extends out from the side of the second protective box 3 and is connected to a second external threaded connector 402. Both the second external threaded connector 402 and the first external threaded connector 206 are located inside the protective cover 9. The protective cover 9 not only protects the second external threaded connector 402 and the first external threaded connector 206, but also cooperates with the baffle 8 to assist in fixing the second protective box 3 and the first protective box 1. The first temperature sensor 203 is used to detect the initial water temperature, while the second temperature sensor 403 is used to detect the water temperature after heat exchange. By comparing the water temperatures before and after the heat exchange, the heat exchange intensity can be determined.

[0031] Furthermore, the second testing unit 4 also includes a second temperature sensor 403 connected to the end of the second connecting pipe 401 away from the second external threaded connector 402. The second temperature sensor 403 is connected to a second flow meter 404, and the second flow meter 404 is connected to a discharge pipe 405. One end of the discharge pipe 405 passes through the second protective box 3 and extends from the back of the second protective box 3 to the outside of the second protective box 3. The discharge pipe 405 is used to detect the discharge of water.

[0032] Furthermore, a second touch screen 406 is installed on the inner wall of the second protective box 3, and a second controller is set on the back of the second touch screen 406. The second touch screen 406, the second flow meter 404, and the second temperature sensor 403 are all connected to the second controller. A first touch screen 207 is installed on the inner wall of the first protective box 1, and a first controller is set on the back of the first touch screen 207. The first temperature sensor 203, the first flow meter 204, and the first touch screen 207 are all connected to the first controller. Both the first controller and the second controller can be microcontrollers or PLC controllers. The detection data of the first temperature sensor 203 and the first flow meter 204 are transmitted to the first controller, and the detection results can be displayed through the first touch screen 207. The detection data of the second temperature sensor 403 and the second flow meter 404 are transmitted to the second controller, and the detection results can be displayed through the second touch screen 406.

[0033] Furthermore, a water tank 5 located on one side of the second protective box 3 is fixedly installed on the top of the first protective box 1. A buckle is provided between the top of the water tank 5 and the top of the second protective box 3. For ease of understanding, this application uses A to represent the buckle and marks it in the figure. The buckle is an existing component, and its specific structure, locking and unlocking methods are all existing technologies, which will not be described in detail in this application. The buckle can fix the second protective box 3 and the water tank 5 together, further improving the stability of the second protective box 3.

[0034] Furthermore, the top of the water tank 5 is provided with a through hole, and the inlet of the water pump 201 is connected to a delivery pipe 202. One end of the delivery pipe 202 passes through the first protective box 1 and the through hole and extends into the water tank 5. The top of the water tank 5 is also provided with a ventilation hole. The water tank 5 is used to store water.

[0035] Furthermore, a limiting rod 6 is fixedly installed on the top of the second protective box 3. A reel 7 is sleeved on the outer surface of the limiting rod 6. A heat exchange tube 701 is wound on the reel 7, and both ends of the heat exchange tube 701 are connected to internal threaded joints 702. The two internal threaded joints 702 can be connected to the first external threaded joint 206 and the second external threaded joint 402 respectively. The heat exchange tube 701 is used to be placed in the geothermal well so that the water transported in the heat exchange tube 701 can be heat exchanged through the geothermal well.

[0036] Furthermore, a second door 303 is hinged to the front of the second protective box 3, and a transparent window is provided on the second door 303. A buckle is also provided between the second door 303 and the second protective box 3. The transparent window facilitates observation of the situation inside the second protective box 3.

[0037] Furthermore, a first door 103 is hinged to the front of the first protective box 1, and a transparent window is also provided on the first door 103. A buckle is also provided between the first door 103 and the first protective box 1. The transparent window facilitates observation of the situation inside the first protective box 1.

[0038] Furthermore, a handle 102 is fixedly installed on the top of the first protective box 1, and a wheel 101 is installed on the bottom of the first protective box 1. The cooperation between the wheel 101 and the handle 102 facilitates the movement of the whole.

[0039] The usage process of the geothermal well in-situ closed-loop water circulation heat exchange intensity tester provided by this utility model is as follows:

[0040] Open the protective cover 9 to separate it from the baffle 8. At this time, the second external threaded connector 402 and the first external threaded connector 206 are exposed. If it is a small-diameter geothermal well, the second protective box 3 does not need to be removed from the top of the first protective box 1. If it is a large-diameter geothermal well, unfasten the buckle between the water tank 5 and the second protective box 3 and remove the second protective box 3. Place the second protective box 3 and the first protective box 1 on both sides of the geothermal well. Then remove the reel 7 from the limiting rod 6. Connect the two ends of the internal threaded connector 702 to the second external threaded connector 402 and the first external threaded connector 206 respectively. Place the heat exchange pipe 701 into the geothermal well and connect it through the water pump 201 and the transmission line. The delivery pipe 202 works in conjunction with each other to draw water out of the water tank 5, and then delivers it in the following order: first temperature sensor 203, first flow meter 204, first connecting pipe 205, first external threaded joint 206, heat exchange pipe 701, second external threaded joint 402, second connecting pipe 401, second temperature sensor 403, second flow meter 404, and discharge pipe 405. During this process, the initial temperature of the water is detected by the first temperature sensor 203. After the water passes through the heat exchange pipe 701, it is heated by heat exchange in the geothermal well. Then, the water temperature after heat exchange is detected by the second temperature sensor 403. By comparing the changes in water temperature before and after the heat exchange, the heat exchange intensity of the geothermal well can be determined.

[0041] The formula for calculating heat transfer intensity is as follows:

[0042] Q = C × ρ × V × (T2 - T1);

[0043] Where Q is the heat transfer intensity (unit: W); C is the specific heat capacity of water, taken as 4.186 × 10⁻⁶. 3 J / (kg·℃); ρ is the density of water, taken as 1000 kg / m³. 3 V represents the volumetric flow rate of water, measured by either the first flow meter 203 or the second flow meter 404, in cubic meters per second (m³). 3 / s; T1 is the initial water temperature, measured by the first temperature sensor 203, in °C; T2 is the water temperature after heat exchange, measured by the second temperature sensor 403, in °C.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A geothermal well in-situ closed water circulation heat exchange intensity tester, characterized in that, The first protective box (1) and the second protective box (3) placed on top of the first protective box (1) are included. Several limiting posts (301) are fixedly installed at the bottom of the second protective box (3). Several limiting grooves (302) are opened at the top of the first protective box (1). The limiting grooves (302) are inserted into the outer surface of the limiting posts (301). Baffles (8) are fixedly installed on the sides of the second protective box (3) and the first protective box (1). A protective cover (9) is also installed on the side of the first protective box (1) through a damping hinge. The baffles (8) are inserted into the inner wall of the protective cover (9). The first protective box (1) is provided with a first testing unit (2), and the second protective box (3) is provided with a second testing unit (4). The first testing unit (2) includes a water pump (201) installed in the first protective box (1). The outlet of the water pump (201) is connected to a first temperature sensor (203). The first temperature sensor (203) is connected to a first flow meter (204). The first flow meter (204) is connected to a first connecting pipe (205). One end of the first connecting pipe (205) extends out from the side of the first protective box (1) and is connected to a first external threaded connector (206). The second testing unit (4) includes a second connecting pipe (401) installed in the second protective box (3). One end of the second connecting pipe (401) extends out from the side of the second protective box (3) and is connected to a second external threaded connector (402). The second external threaded connector (402) and the first external threaded connector (206) are both located inside the protective cover (9).

2. The geothermal well in-situ closed water circulation heat transfer intensity tester according to claim 1, characterized in that, The second test unit (4) also includes a second temperature sensor (403) connected to the end of the second connecting pipe (401) away from the second external threaded joint (402). The second temperature sensor (403) is connected to a second flow meter (404), and the second flow meter (404) is connected to a discharge pipe (405). One end of the discharge pipe (405) passes through the second protective box (3) and extends from the back of the second protective box (3) to the outside of the second protective box (3).

3. The in-situ closed water circulation heat transfer intensity tester for geothermal well according to claim 2, characterized in that, A second touch screen (406) is installed on the inner wall of the second protective box (3). A second controller is provided on the back of the second touch screen (406). The second touch screen (406), the second flow meter (404), and the second temperature sensor (403) are all connected to the second controller.

4. The geothermal well in-situ closed water circulation heat transfer intensity tester according to claim 1, characterized in that, A first touch screen (207) is installed on the inner wall of the first protective box (1). A first controller is provided on the back of the first touch screen (207). The first temperature sensor (203), the first flow meter (204) and the first touch screen (207) are all connected to the first controller.

5. The geothermal well in-situ closed water circulation heat transfer intensity tester according to claim 1, characterized in that, A water tank (5) located on one side of the second protective box (3) is fixedly installed on the top of the first protective box (1), and a buckle is provided between the top of the water tank (5) and the top of the second protective box (3).

6. The geothermal well in-situ closed water circulation heat transfer intensity tester according to claim 5, characterized in that, The top of the water tank (5) is provided with a through hole, and the inlet of the water pump (201) is connected to a delivery pipe (202). One end of the delivery pipe (202) passes through the first protective box (1) and the through hole and extends into the water tank (5). The top of the water tank (5) is also provided with a ventilation hole.

7. The geothermal well in-situ closed water circulation heat transfer intensity tester according to claim 1, characterized in that, The top of the second protective box (3) is fixedly installed with a limiting rod (6), and a reel (7) is sleeved on the outer surface of the limiting rod (6). A heat exchange tube (701) is wound on the reel (7), and both ends of the heat exchange tube (701) are connected to an internal threaded joint (702).

8. The geothermal well in-situ closed water circulation heat transfer intensity tester according to claim 1, characterized in that, The front of the second protective box (3) is hinged to have a second door (303) and a transparent window is provided on the second door (303). A buckle is also provided between the second door (303) and the second protective box (3).

9. The geothermal well in-situ closed water circulation heat transfer intensity tester according to claim 1, characterized in that, The front of the first protective box (1) is hinged to have a first door (103) and a transparent window is provided on the first door (103). A buckle is also provided between the first door (103) and the first protective box (1).

10. The in-situ closed water circulation heat transfer intensity tester for geothermal well according to claim 1, characterized in that, A handle (102) is fixedly installed on the top of the first protective box (1), and wheels (101) are installed on the bottom of the first protective box (1).

Images