Novel geothermal resource heat extraction well device

Abstract

The utility model discloses a novel geothermal resource heat extraction well device. The utility model has the beneficial effects that the two heat taking well bodies are arranged at the heat taking position on the ground, and the water injection operation of one heat taking well body is realized when water subjected to heat exchange in the other heat taking well body is pumped out between the two heat taking well bodies; the defect that time consumed in the whole heat extraction process is long due to the fact that water cannot be injected synchronously in the water pumping process of the heat extraction well body is effectively overcome, the heat extraction process in the heat extraction well body is more continuous, and the heat extraction efficiency is higher. Meanwhile, a plugging assembly composed of a plugging block, a guide telescopic rod and a spring is installed in a plugging box on a water injection pipe on each heat taking well body, and automatic resetting of the plugging block after an external water pipe is pulled out can be achieved under the action of the spring and the guide telescopic rod, so that plugging of the water injection pipe is achieved; heat in the heat extraction well body is prevented from being dissipated to the external environment, and energy waste is reduced.

Description

Technical Field

[0001] This utility model relates to the field of geothermal extraction equipment, specifically to a novel geothermal resource extraction well device. Background Technology

[0002] Geothermal energy is natural heat energy extracted from the Earth's crust. This energy originates from the Earth's internal magma and exists in the form of heat. The simplest and most cost-effective way to utilize geothermal energy is to directly extract this heat source and its energy. Currently, the development of medium-deep geothermal energy in China includes a non-invasive geothermal model. This model extracts heat without extracting water. It involves drilling wells into deep underground geothermal reservoirs, placing heat exchangers in the wells, and using a medium to circulate and absorb heat within the exchangers, bringing the heat from the formation to the surface for use. However, this method results in significant heat waste within the extraction well.

[0003] To address the problem of heat waste during the sampling process of geothermal wells, Chinese patent CN202321192735.X discloses a geothermal resource extraction well device, comprising: a ground surface, a water injection cylinder and a water pumping cylinder, wherein the upper end of the water injection cylinder is provided with a water outlet cylinder and one end of the water pumping cylinder is provided with a protrusion.

[0004] Although the geothermal resource extraction well device described in the above patent can achieve efficient utilization of heat in the extraction well through sealing and insulation and intermittent water injection and extraction, the water extraction and water injection of the above-mentioned structure are not synchronized during use. That is to say, the inlet pipe does not work when extracting water after heat exchange, and the outlet pipe does not work during water injection. This makes the heat extraction process of the extraction well less continuous due to the long water extraction process, resulting in low heat extraction efficiency. At the same time, since the inlet pipe of the above-mentioned structure is an open structure, the heat in the extraction well can easily escape into the external environment through the inlet pipe during the heat extraction process, thus causing energy waste. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a new type of geothermal resource heat extraction well device that, in view of the current state of the technology, can avoid the continuous heat extraction process of the heat extraction well body by alternating water pumping and heat extraction, thus improving the heat extraction efficiency, and can also achieve automatic sealing at the water injection pipe port to prevent the heat in the heat extraction well body from escaping to the external environment through the water injection pipe port.

[0006] This utility model is achieved through the following technical solution: This utility model proposes a novel geothermal resource heat extraction well device, including a ground surface. Two heat extraction well bodies are symmetrically arranged on the ground surface for heat extraction. An alternating pumping mechanism is installed between the two heat extraction well bodies on the ground surface. The alternating pumping mechanism includes a three-way pipe, a water pump, and a valve. The two water inlets of the three-way pipe are respectively connected to a water outlet pipe that extends into the heat extraction well body. A water injection pipe is also installed on the water inlet side of each heat extraction well body. A sealing box is installed at the top of each water injection pipe. Four sealing components are installed in a ring shape inside the sealing box. The sealing components include a sealing block, a guide telescopic rod, and a spring.

[0007] Furthermore, a heat-conducting cylinder is installed at the bottom of each heat-extracting well body, and an insulation cover is installed on the upper side of the heat-conducting cylinder inside the heat-extracting well body.

[0008] Furthermore, the insulation cover has a through hole one located at the water outlet pipe, and the insulation cover has a through hole two located at the water inlet pipe.

[0009] Furthermore, there are two valves, and the two valves are respectively installed on the upper side of the two water inlet sections of the three-way pipe.

[0010] Furthermore, the outlet section of the tee pipe is connected to the flange of the water pump, and the water pump has its own drain pipe.

[0011] Furthermore, the sealing box is formed on the water injection pipe, and the internal space of the sealing box is connected to the water injection pipe.

[0012] Furthermore, the upper surface of the sealing block is a conical structure, and the four sealing blocks together form a sealing disc with a conical groove at the top and a circular structure at the bottom, and the area of ​​the sealing disc is the same as the cross-sectional area of ​​the water injection pipe.

[0013] Furthermore, the fixed part of the guide telescopic rod is bolted to the sealing box, the telescopic part of the guide telescopic rod is bolted to the sealing block, and the guide telescopic rod passes through the spring.

[0014] Compared with the prior art, this utility model has the following advantages:

[0015] This invention involves creating two heat extraction wells at a ground-based heat extraction location and installing an alternating pumping mechanism between them, consisting of a T-junction, valves, and a water pump. This mechanism allows for the simultaneous extraction of water from one well while the other well is being filled with water. This effectively avoids the drawback of prolonged heat extraction time caused by the inability to simultaneously inject water during pumping, resulting in a more continuous and efficient heat extraction process within the wells. Furthermore, a sealing assembly consisting of a sealing block, a guide rod, and a spring is installed in the sealing box on the water injection pipe of each well. The sealing block automatically resets after the external water pipe is pulled out, sealing the water injection pipe and preventing heat loss from the well to the external environment, thus reducing energy waste. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a novel geothermal resource heat extraction well device described in this utility model;

[0017] Figure 2 This is a main sectional view of a novel geothermal resource heat extraction well device according to this utility model;

[0018] Figure 3 This is an internal view of the water injection pipe and the sealing box in a novel geothermal resource heat extraction well device according to this utility model;

[0019] Figure 4 This is a top sectional view of the sealing box in a novel geothermal resource heat extraction well device described in this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the heat insulation cover in a novel geothermal resource extraction well device according to this utility model.

[0021] The annotations in the attached figures are explained as follows:

[0022] 1. Alternating pumping mechanism; 101. Tee pipe; 102. Pump; 103. Valve; 2. Heat extraction well body; 3. Ground surface; 4. Injection pipe; 5. Sealing box; 6. Outlet pipe; 7. Insulation cover; 8. Heat conduction cylinder; 9. Sealing assembly; 901. Sealing block; 902. Guide telescopic rod; 903. Spring; 10. Through hole one; 11. Through hole two. Detailed Implementation

[0023] 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.

[0024] like Figures 1-3 As shown, a novel geothermal resource heat extraction well device in this embodiment includes a ground surface 3. Two heat extraction well bodies 2 are symmetrically opened on the heat extraction part of the ground surface 3. An alternating pumping mechanism 1 is installed on the ground surface 3 between the two heat extraction well bodies 2. The alternating pumping mechanism 1 includes a three-way pipe 101, a water pump 102 and a valve 103. A water outlet pipe 6 that extends into the heat extraction well body 2 is connected to the two water inlets of the three-way pipe 101. A water injection pipe 4 is also installed on the water inlet side of each heat extraction well body 2. A sealing box 5 is installed at the top of each water injection pipe 4. Four sealing components 9 are installed in a ring inside the sealing box 5. The sealing components 9 include a sealing block 901, a guide telescopic rod 902 and a spring 903.

[0025] This utility model provides a novel geothermal resource heat extraction well device that achieves higher heat extraction efficiency by alternating water pumping and heat extraction, thus avoiding continuous heat extraction during the pumping process. It also features automatic sealing at the injection pipe 4 port to prevent heat loss from the well body 2 to the external environment. This solves the problem that while existing geothermal resource heat extraction well devices can achieve efficient heat utilization through sealing, insulation, and intermittent water injection and extraction, the pumping and injection processes are asynchronous. Specifically, the inlet pipe is not operational when extracting heat-exchanged water, and the outlet pipe is not operational during injection. This results in a discontinuous heat extraction process due to the long extraction time, leading to low heat extraction efficiency. Furthermore, the open inlet pipe in this structure allows heat to easily escape to the external environment during extraction, causing energy loss. To address the issue of waste, the general approach of this utility model is as follows: Two heat-extracting wells 2 are established at the same heat-extracting location on the ground 3. An alternating pumping mechanism 1, consisting of a three-way pipe 101, a valve 103, and a water pump 102, is installed between the two wells 2. While the water from one heat-extracting well 2 is being pumped out, the other heat-extracting well 2 is being filled with water. This effectively avoids the prolonged heat extraction process caused by the inability to simultaneously inject water during the pumping process. The drawbacks of the previous method are eliminated, making the heat extraction process in the well body 2 more continuous and the heat extraction efficiency higher. At the same time, a sealing assembly 9 consisting of a sealing block 901, a guide telescopic rod 902 and a spring 903 is installed in the sealing box 5 on the water injection pipe 4 of each well body 2. Under the action of the spring 903 and the guide telescopic rod 902, the sealing block 901 can be automatically reset after the external water pipe is pulled out, so as to seal the water injection pipe 4, prevent the heat in the well body 2 from dissipating to the external environment, and reduce energy waste.

[0026] like Figure 2 and Figure 5 As shown, a heat-conducting cylinder 8 is also installed at the bottom of each heat-extracting well body 2, and an insulation cover 7 is also installed on the upper side of the heat-conducting cylinder 8 inside the heat-extracting well body 2.

[0027] As one implementation method, the heat-conducting cylinder 8 is made of high-temperature resistant stainless steel and is mainly used to transfer geothermal energy to cold water to heat the water; the heat-insulating cover 7 is made of heat-insulating material and has a vacuum chamber inside. The heat-insulating cover 7 can effectively prevent the heat inside the heat extraction well 2 from directly dissipating to the external environment.

[0028] like Figure 5As shown, a through hole 10 is provided on the insulation cover 7 at the outlet pipe 6, and a through hole 2 11 is provided on the insulation cover 7 at the water inlet pipe 4.

[0029] In one implementation, the through hole 10 is inserted into the water outlet pipe 6, mainly to ensure the reliable installation of the water outlet pipe 6 in the heat extraction well body 2; the through hole 2 11 is inserted into the water injection pipe 4, mainly to ensure the reliable installation of the water injection pipe 4 in the heat extraction well body 2.

[0030] like Figures 1-2 As shown, there are two valves 103, and the two valves 103 are respectively installed on the upper side of the two water inlet sections of the three-way pipe 101;

[0031] As one implementation method, valve 103 controls the opening and closing of the water outlet pipe 6 and the three-way pipe 101. By means of valve 103, the alternating connection between the water outlet pipe 6 and the three-way pipe 101 in the two heat extraction well bodies 2 can be controlled to realize the alternating pumping of water from the two heat extraction well bodies 2.

[0032] like Figures 1-2 As shown, the outlet section of the tee pipe 101 is connected to the flange of the water pump 102, and the water pump 102 has its own drain pipe.

[0033] As one implementation method, the built-in drain pipe can transport the hot water pumped by the water pump 102 to an external water supply pipe to achieve convenient transportation of water after heat exchange.

[0034] like Figure 1 and Figure 3 As shown, the sealing box 5 is formed on the water injection pipe 4, and the internal space of the sealing box 5 is connected to the water injection pipe 4;

[0035] As one implementation method, the sealing box 5 is mainly used to provide installation space for the sealing component 9 and ensure the reliable installation and fixation of the sealing component 9.

[0036] like Figure 3 and Figure 4 As shown, the upper surface of the sealing block 901 is a conical structure. After the four sealing blocks 901 come into contact, they together form a sealing disc with a conical groove at the top and a circular structure at the bottom. The area of ​​the sealing disc is the same as the cross-sectional area of ​​the water injection pipe 4.

[0037] In one implementation, when the external water supply pipe is inserted into the water injection pipe 4, as the external water supply pipe is inserted into the water injection pipe 4, the cone-shaped structure on the upper side of the sealing block 901 can press the sealing block 901 into the sealing box 5, thereby opening the top of the water injection pipe 4. After the top of the water injection pipe 4 is opened, water can be added into the water injection pipe 4 through the external water supply pipe.

[0038] like Figure 3 and Figure 4As shown, the fixed part of the guide telescopic rod 902 is bolted to the sealing box 5, the telescopic part of the guide telescopic rod 902 is bolted to the sealing block 901, and the guide telescopic rod 902 passes through the spring 903;

[0039] In one implementation, the spring 903 is mainly used to achieve automatic reset after the sealing block 901 is pressed into the sealing box 5, and the guide telescopic rod 902 is mainly used to ensure the stable extension and retraction of the spring 903.

[0040] The specific implementation process of this embodiment is as follows: When extracting heat, cold water is first added to one heat extraction well body 2. After the added cold water is rapidly heated, the heated water is pumped out for use by the water pump 102. While pumping out the hot water in the heat extraction well body 2 after adding cold water, cold water is added to another heat extraction well body 2. This ensures that after the water in the second heat extraction well body 2 is filled and heated, the water in the first heat extraction well body 2 is just pumped out. At this time, water is added to the water in the first heat extraction well body 2. Water is injected, and the heated water in the well body 2 of the heat extraction well is pumped out by the water pump 102. This cycle is repeated to achieve continuous water pumping and injection, thereby improving the heat extraction efficiency of the well body 2. After water injection, the sealing block 901 of the external water pipe will automatically reset under the action of the spring 903 and the guide telescopic rod 902 to seal the water injection pipe 4, prevent the heat in the well body 2 from dissipating to the external environment, and reduce energy waste.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel geothermal resource extraction well device, characterized in that: The ground (3) includes two symmetrically arranged heat-collecting well bodies (2) on the ground (3). An alternating pumping mechanism (1) is installed between the two heat-collecting well bodies (2) on the ground (3). The alternating pumping mechanism (1) includes a three-way pipe (101), a water pump (102) and a valve (103). The two water inlets of the three-way pipe (101) are respectively connected to a water outlet pipe (6) that extends into the heat-collecting well body (2). A water injection pipe (4) is also installed on the water inlet side of each heat-collecting well body (2). A sealing box (5) is installed at the top of each water injection pipe (4). Four sealing components (9) are installed in a ring inside the sealing box (5). The sealing components (9) include a sealing block (901), a guide telescopic rod (902) and a spring (903).

2. The novel geothermal resource extraction well device according to claim 1, characterized in that: Each of the heat extraction well bodies (2) is also equipped with a heat-conducting cylinder (8) at the bottom end, and an insulation cover (7) is also installed on the upper side of the heat-conducting cylinder (8) inside the heat extraction well body (2).

3. The novel geothermal resource extraction well device according to claim 2, characterized in that: The insulation cover (7) has a through hole one (10) at the water outlet pipe (6), and the insulation cover (7) has a through hole two (11) at the water inlet pipe (4).

4. A novel geothermal resource extraction well device according to claim 1, characterized in that: There are two valves (103), and the two valves (103) are respectively installed on the upper side of the two water inlet sections of the three-way pipe (101).

5. A novel geothermal resource extraction well device according to claim 1, characterized in that: The outlet section of the tee pipe (101) is connected to the flange of the water pump (102), and the water pump (102) has its own drain pipe.

6. A novel geothermal resource extraction well device according to claim 1, characterized in that: The sealing box (5) is formed on the water injection pipe (4), and the internal space of the sealing box (5) is connected to the water injection pipe (4).

7. A novel geothermal resource extraction well device according to claim 1, characterized in that: The upper surface of the sealing block (901) is a conical structure. When the four sealing blocks (901) come into contact, they together form a sealing disc with a conical groove at the top and a circular structure at the bottom. The area of ​​the sealing disc is the same as the cross-sectional area of ​​the water injection pipe (4).

8. A novel geothermal resource extraction well device according to claim 1, characterized in that: The fixed part of the guide telescopic rod (902) is bolted to the sealing box (5), the telescopic part of the guide telescopic rod (902) is bolted to the sealing block (901), and the guide telescopic rod (902) passes through the spring (903).

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