Middle-deep layer geothermal gradient utilization adjusting device

Abstract

The utility model discloses a medium-deep layer geothermal gradient utilization adjusting device which comprises a user side, a geothermal pipe arranged in the ground of the user side, a collecting well located in the stratum and used for supplying heat to the user side, a main liquid pumping pipe with one end inserted into the collecting well and used for collecting hot water, and a water pump connected with the main liquid pumping pipe. The main liquid pumping pipe is communicated with a filter used for filtering pumped water and a recharge well located in a stratum and used for recycling water flowing back after heat supply. The system further comprises a heat supply unit. The heat adjusting unit comprises a heat conduction assembly used for connecting the main heat supply assembly and the secondary heat supply assembly to a user side, and a heat adjusting assembly arranged in the heat conduction assembly and used for conducting heat supply switching on the main heat supply assembly and the secondary heat supply assembly. The secondary inlet pipe, the secondary outlet pipe, the main inlet pipe and the main outlet pipe are arranged in the rotating disc, the disc is arranged on the outer side of the rotating disc in a sealed mode, when a heat supply route and a geothermal pipe are switched, only the adjusting shaft needs to be rotated, and wiring in a user side is greatly simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of geothermal utilization, in particular to a medium-deep geothermal step utilization regulating device. Background Art

[0002] In recent years, a geothermal utilization system has been proposed that uses groundwater extracted from the stratum as a warm heat source or a cold heat source. The groundwater extracted from the stratum is used as a heat source and then returned to the ground after heat exchange through a heat exchanger. The other end of the heat exchanger is connected to the user end to continuously provide heating for the user.

[0003] In the prior art, in order to reduce energy consumption, two groups of heating pipes are usually connected from the stratum to the user end. One group of pipes is used to directly connect to the heat exchanger without heating when the stratum hot water meets the heating needs of the user end, so as to provide heating for the user end. The other group of heating pipes needs to be heated by a ground source heat pump and then connected to the heat exchanger corresponding to the user end. It is suitable for use when the heat of the hot water in the stratum cannot meet the needs of the user end.

[0004] However, when switching between these two different heating methods at the user end, it is necessary to close one set of heating valves and open the other set of heating valves respectively. The switching of the entire heating valve is rather cumbersome. In addition, when the two sets of heating methods are connected at the user end, it is usually necessary to gather the hot water into a set of ground pipes at the user end. The wiring at the junction of the entire pipeline is relatively complicated, which increases the risk of leakage in the wiring pipe.

[0005] The above contents are only used to assist in understanding the technical solution of the present invention, and do not constitute an admission that the above contents are the closest prior art. Utility Model Content

[0006] The purpose of the utility model is to provide a medium-deep geothermal cascade utilization adjustment device to solve the problems proposed in the above background technology that the existing user-end heating valve adjustment is relatively cumbersome, and the connection between the hot water pipe input from the outside at the user end and the formation pipe is relatively complicated, which easily leads to an increased risk of pipeline leakage.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A medium-deep geothermal cascade utilization and regulation device, comprising a user end, a geothermal pipe is arranged in the ground of the user end, a collection well located in the formation for supplying heat to the user end, a main liquid extraction pipe for collecting hot water inserted into the collection well at one end, the main liquid extraction pipe is connected to a filter for filtering the extracted water, a recharge well located in the formation for the user to recover the water returned after the heating, and also includes:

[0009] The heating unit includes a main heating component for heating the user end when the hot water in the collection well cannot meet the user end, and a secondary heating component for heating the user end when the hot water in the collection well meets the user end;

[0010] The heat regulating unit includes a heat conducting component for connecting the main heating component and the secondary heating component to the user end, and a heat regulating component arranged inside the heat conducting component for switching the heat supply between the main heating component and the secondary heating component.

[0011] Furthermore, the main heating component includes:

[0012] A first plate heat exchanger is provided at one end of the main liquid extraction pipe opposite to the collection well;

[0013] A ground source heat pump, connected to the main liquid extraction pipe and located between the filter and the first plate heat exchanger, for heating the water in the main liquid extraction pipe;

[0014] A first return pipe is provided between the first plate heat exchanger and the reinjection well, and is used to guide the water after the main liquid extraction pipe enters the first plate heat exchanger into the reinjection well;

[0015] The first water inlet and outlet pipe is arranged between the first plate heat exchanger and the user end, and is used to exchange the water after heat exchange by the first plate heat exchanger with the water after use by the user end.

[0016] Furthermore, the secondary heating component comprises:

[0017] A secondary liquid extraction pipe, one end of which is connected to the main liquid extraction pipe between the ground source heat pump and the filter;

[0018] A second plate heat exchanger is connected to the water outlet of the secondary liquid extraction pipe;

[0019] A second return pipe is provided between the second plate heat exchanger and the reinjection well, and is used to guide the water after the secondary liquid extraction pipe enters the second plate heat exchanger into the reinjection well;

[0020] The second water inlet and outlet pipe is arranged between the second plate heat exchanger and the user end, and is used to exchange the water after heat exchange by the second plate heat exchanger with the water after use by the user end.

[0021] Furthermore, the heat conducting component comprises:

[0022] A disc, fixedly connected to one side of the interior of the user end;

[0023] An inner circular cavity is provided inside the disc, the first water inlet and outlet pipe and the second water inlet and outlet pipe are both connected to the inner circular cavity, and the inlet and outlet of the first water inlet and outlet pipe and the inlet and outlet of the second water inlet and outlet pipe are at the same level in the inner circular cavity;

[0024] The hot water inlet pipe has one end connected to the inner circular cavity and the other end connected to the water inlet of the geothermal pipe;

[0025] One end of the hot water outlet pipe is connected to the inner circular cavity, and the other end is connected to the water outlet of the geothermal pipe.

[0026] Furthermore, the heat regulating component comprises:

[0027] A turntable is rotatably connected to the inner circular cavity, and a sealing gasket is provided between the outer side of the turntable and the inner circular cavity;

[0028] A main inlet pipe is arranged inside the rotating disk, the water inlet end of the main inlet pipe corresponds to the first water inlet and outlet pipes, and the water outlet end of the main inlet pipe corresponds to the hot water inlet pipe;

[0029] The main outlet pipe is arranged inside the rotating disk, the water outlet end of the main outlet pipe corresponds to the first water inlet and outlet pipe, and the water inlet end of the main inlet pipe corresponds to the hot water outlet pipe.

[0030] Furthermore, the heat regulating component also includes:

[0031] A secondary inlet pipe is arranged inside the rotating disk, the water inlet end of the secondary inlet pipe corresponds to the second water inlet and outlet pipes, and the water outlet end of the secondary inlet pipe corresponds to the hot water inlet pipe;

[0032] The secondary outlet pipe is arranged inside the rotating disk, the water outlet end of the secondary inlet pipe corresponds to the second inlet and outlet water pipes, and the water inlet end of the secondary inlet pipe corresponds to the hot water outlet pipe.

[0033] Furthermore, the heating component also includes an adjusting shaft, which is fixedly connected to one end of the turntable and passes through the inner circular cavity to the outside of the turntable for switching the position of the turntable. A reserved hole is provided on the outside of the adjusting shaft and inside the disk.

[0034] Compared with the prior art, the beneficial effects of the utility model are:

[0035] 1. The utility model rotates the adjusting shaft, and the adjusting shaft drives the turntable to rotate in the inner circular cavity, so that the turntable closes the secondary inlet pipe and the secondary outlet pipe, and the main inlet pipe and the main outlet pipe are rotated to be connected with the first inlet and outlet water pipes. At the same time, the main inlet pipe is connected with the hot water inlet pipe, and the main outlet pipe is connected with the hot water outlet pipe. The ground source heat pump further heats the geothermal water extracted from the collection well by the main pumping pipe and then passes through the first plate heat exchanger and the first reflux pipe in sequence, and finally enters the reinjection well for recovery. At the same time, the circulating pump in the geothermal pipe drives the water in the geothermal pipe along the hot water outlet pipe, the main outlet pipe, and the first inlet and outlet water pipe in sequence, and exchanges heat with the geothermal water input by the main pumping pipe in the first plate heat exchanger. Subsequently, it passes through the first inlet and outlet water pipes, the main inlet pipe, and the hot water inlet pipe in sequence, and then enters the geothermal pipe again to continuously supply heat to the user end. Therefore, the closing of one group of heating routes and the opening of another group of heating routes can be synchronously completed by rotating the adjusting shaft, and the operation is simple.

[0036] 2. The utility model arranges the secondary inlet pipe, the secondary outlet pipe, the main inlet pipe and the main outlet pipe in the turntable, and seals the outer side of the turntable with a disc. When switching the heating route and the geothermal pipe, it is only necessary to rotate the adjustment shaft, which greatly simplifies the wiring in the user end and reduces the risk of leakage in the wiring pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0038] Figure 2 This is a diagram showing the coordination relationship between the geothermal pipe and the user end of the utility model;

[0039] Figure 3 This is a diagram showing the coordination relationship between the disk and the user end of the utility model;

[0040] Figure 4 This is a schematic diagram of the internal structure of the heat conducting component and the heat regulating component of the utility model;

[0041] Figure 5 This is a diagram of the main inlet pipe and the first inlet and outlet water pipes being connected to each other in the utility model;

[0042] Figure 6 This is a diagram showing the connection status of the secondary inlet pipe and the second inlet and outlet water pipes of the utility model.

[0043] Reference numerals: 100, collection well; 101, reinjection well; 102, main liquid extraction pipe; 103, filter; 1, heating unit; 2, heat regulating unit; 11, main heating component; 111, ground source heat pump; 112, first plate heat exchanger; 113, first inlet and outlet pipes; 114, first return pipe; 12, secondary heating component; 121, secondary liquid extraction pipe; 122, second plate heat exchanger; 123 , second water inlet and outlet pipes; 124, second return pipe; 21, user end; 22, geothermal pipe; 23, heat conduction component; 231, disc; 232, inner circular cavity; 233, reserved hole; 234, hot water inlet pipe; 235, hot water outlet pipe; 24, heating control component; 241, turntable; 242, main inlet pipe; 2421, main outlet pipe; 243, secondary inlet pipe; 2431, secondary outlet pipe; 25, adjusting shaft. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] See also Figure 1-6 , the utility model provides a technical solution:

[0046] A medium-deep geothermal cascade utilization and regulation device, comprising a user end 21, a geothermal pipe 22 is arranged in the ground of the user end 21, a collection well 100 located in the formation for supplying heat to the user end 21, a main liquid extraction pipe 102 inserted into the collection well 100 at one end for collecting hot water, the main liquid extraction pipe 102 is connected to a filter 103 for filtering the extracted water, a recharge well 101 located in the formation for the user to recover the water returned after heating, and further comprising:

[0047] The heating unit 1 includes a main heating component 11 for heating the user end 21 when the hot water in the collection well 100 cannot meet the user end 21, and a secondary heating component 12 for heating the user end 21 when the hot water in the collection well 100 meets the user end 21;

[0048] The heat regulating unit 2 includes a heat conducting component 23 for connecting the main heating component 11 and the secondary heating component 12 to the user end 21 , and a heat regulating component 24 arranged inside the heat conducting component 23 for switching the heating between the main heating component 11 and the secondary heating component 12 .

[0049] As an improvement, Figure 1 As shown, the main heating component 11 includes:

[0050] A first plate heat exchanger 112 is disposed at one end of the main liquid extraction pipe 102 opposite to the collection well 100;

[0051] A ground source heat pump 111, connected to the main liquid extraction pipe 102 and located between the filter 103 and the first plate heat exchanger 112, for heating the water in the main liquid extraction pipe 102;

[0052] A first return pipe 114 is provided between the first plate heat exchanger 112 and the reinjection well 101 and is used to guide the water after the main liquid extraction pipe 102 enters the first plate heat exchanger 112 into the reinjection well 101;

[0053] The first water inlet and outlet pipe 113 is disposed between the first plate heat exchanger 112 and the user end 21 , and is used to exchange water after heat exchange in the first plate heat exchanger 112 with water after use in the user end 21 .

[0054] Furthermore, the secondary heating component 12 includes:

[0055] A secondary liquid extraction pipe 121, one end of which is connected to the main liquid extraction pipe 102 between the ground source heat pump 111 and the filter 103;

[0056] The second plate heat exchanger 122 is connected to the water outlet of the secondary liquid extraction pipe 121;

[0057] The second return pipe 124 is provided between the second plate heat exchanger 122 and the reinjection well 101, and is used to guide the water after entering the second plate heat exchanger 122 through the secondary liquid extraction pipe 121 into the reinjection well 101;

[0058] The second water inlet and outlet pipe 123 is provided between the second plate heat exchanger 122 and the user end 21, and is used to exchange the water after heat exchange in the second plate heat exchanger 122 with the water after use in the user end 21;

[0059] A pump is provided inside the secondary pumping pipe (121) for pumping the geothermal water in the collection well 100 into the second plate heat exchanger 122.

[0060] Furthermore, Figure 3 As shown, the heat conducting component 23 includes:

[0061] The disk 231 is fixedly connected to one side of the user terminal 21;

[0062] The inner circular cavity 232 is provided inside the disc 231, the first water inlet and outlet pipe 113 and the second water inlet and outlet pipe 123 are both connected to the inner circular cavity 232, and the inlet and outlet of the first water inlet and outlet pipe 113 and the second water inlet and outlet pipe 123 are at the same level in the inner circular cavity 232;

[0063] The hot water inlet pipe 234 has one end connected to the inner circular cavity 232 and the other end connected to the water inlet of the geothermal pipe 22;

[0064] One end of the hot water outlet pipe 235 is connected to the inner circular cavity 232 , and the other end is connected to the water outlet of the geothermal pipe 22 .

[0065] Among them, Figure 4-5 As shown, the heat regulating component 24 includes:

[0066] A rotating disk 241 is rotatably connected to the inner circular cavity 232, and a sealing gasket is provided between the outer side of the rotating disk 241 and the inner circular cavity 232;

[0067] A main inlet pipe 242 is disposed inside the rotating disk 241, the water inlet end of the main inlet pipe 242 corresponds to the first water inlet and outlet pipes 113, and the water outlet end of the main inlet pipe 242 corresponds to the hot water inlet pipe 234;

[0068] The main outlet pipe 2421 is disposed inside the rotating disk 241 . The water outlet end of the main outlet pipe 2421 corresponds to the first water inlet and outlet pipe 113 , and the water inlet end of the main inlet pipe 242 corresponds to the hot water outlet pipe 235 .

[0069] In addition, the heat regulating component 24 also includes:

[0070] A secondary inlet pipe 243 is disposed inside the rotating disk 241, the water inlet end of the secondary inlet pipe 243 corresponds to the second water inlet and outlet pipes 123, and the water outlet end of the secondary inlet pipe 243 corresponds to the hot water inlet pipe 234;

[0071] The secondary outlet pipe 2431 is disposed inside the rotating disk 241 . The water outlet end of the secondary inlet pipe 243 corresponds to the second water inlet and outlet pipes 123 , and the water inlet end of the secondary inlet pipe 243 corresponds to the hot water outlet pipe 235 .

[0072] As an improvement, the heating component 24 also includes an adjusting shaft 25, which is fixedly connected to one end of the turntable 241 and passes through the disk 231 to the outside from the inner circular cavity 232, and is used to switch the position of the turntable 241. A reserved hole 233 is provided on the outside of the adjusting shaft 25 and inside the disk 231.

[0073] It should be supplemented that a circulation pump is provided in the geothermal pipe 22 for promoting the circulation of water in the geothermal pipe 22 , but the circulation pump is not shown in the figure.

[0074] It should be noted that if Figure 1 , Figure 6As shown, in the specific implementation process of the utility model, when the temperature of the geothermal water in the collection well 100 meets the heating demand of the user end 21, the second inlet and outlet water pipes 123 are connected to the secondary inlet pipe 243 and the secondary outlet pipe 2431 respectively, the secondary inlet pipe 243 is connected to the hot water inlet pipe 234, the secondary outlet pipe 2431 is connected to the hot water outlet pipe 235, and the liquid pumping pump in the secondary liquid pumping pipe 121 pumps the geothermal water in the collection well 100 through the main liquid pumping pipe 102, the secondary liquid pumping pipe 121, the second plate heat exchanger 122, the second plate heat exchanger 123, the second plate heat exchanger 124, the second plate heat exchanger 125, the second plate heat exchanger 126, the second plate heat exchanger 127, the second plate heat exchanger 128, the second plate heat exchanger 129 ... The second return pipe 124 eventually enters the recharging well 101 for recycling. At the same time, the circulating pump in the geothermal pipe 22 sequentially moves the water in the geothermal pipe 22 along the hot water outlet pipe 235, the secondary outlet pipe 2431, and the second inlet and outlet pipe 123, and exchanges heat with the geothermal water input from the secondary liquid extraction pipe 121 in the second plate heat exchanger 122. Subsequently, the water sequentially passes through the second inlet and outlet pipe 123, the secondary inlet pipe 243, and the hot water inlet pipe 234, and then enters the geothermal pipe 22 again to continuously supply heat to the user end 21.

[0075] like Figure 1 , Figure 5 As shown, when the temperature of the geothermal water in the collection well 100 cannot meet the heating demand of the user end 21, the liquid pump in the secondary liquid pumping pipe 121 stops working, the ground source heat pump 111 is turned on, and the adjusting shaft 25 is rotated. The adjusting shaft 25 drives the turntable 241 to rotate in the inner circular cavity 232, so that the turntable 241 closes the secondary inlet pipe 243 and the secondary outlet pipe 2431, and the main inlet pipe 242 and the main outlet pipe 2421 are rotated to be connected with the first inlet and outlet water pipes 113. At the same time, the main inlet pipe 242 is connected with the hot water inlet pipe 234, and the main outlet pipe 2421 is connected with the hot water outlet pipe 235. The ground source heat pump 111 further heats the geothermal water extracted from the collection well 100 by the main liquid pumping pipe 102 and then heats it according to the temperature. The water passes through the first plate heat exchanger 112 and the first return pipe 114 for the first time, and finally enters the reinjection well 101 for recovery. At the same time, the circulating pump in the geothermal pipe 22 sequentially moves the water in the geothermal pipe 22 along the hot water outlet pipe 235, the main outlet pipe 2421, and the first inlet and outlet water pipe 113, and then exchanges heat with the geothermal water input by the main pumping pipe 102 in the first plate heat exchanger 112. Subsequently, the water passes through the first inlet and outlet water pipe 113, the main inlet pipe 242, and the hot water inlet pipe 234 in turn, and then enters the geothermal pipe 22 again to continuously supply heat to the user end 21, so that only the adjustment shaft 25 needs to be rotated to synchronously complete the closing of one group of heating routes and the opening of another group of heating routes, which is simple to operate.

[0076] like Figure 4-5 As shown, the utility model arranges the secondary inlet pipe 243, the secondary outlet pipe 2431, the main inlet pipe 242, and the main outlet pipe 2421 in the turntable 241, and the disc 231 is sealed on the outer side of the turntable 241. When switching the heating route and the geothermal pipe 22, it is only necessary to rotate the adjustment shaft 25, which greatly simplifies the wiring in the user end 21 and reduces the risk of leakage in the wiring pipeline.

[0077] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0078] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A medium-deep geothermal cascade utilization and regulation device, comprising a user end (21), a geothermal pipe (22) is arranged in the ground of the user end (21), a collection well (100) located in the formation for supplying heat to the user end (21), a main liquid extraction pipe (102) for collecting hot water inserted into the collection well (100) at one end, the main liquid extraction pipe (102) is connected to a filter (103) for filtering the extracted water, and a recharge well (101) located in the formation for the user to recover the water returned after the heating, characterized in that: Also includes: A heating unit (1) comprises a main heating component (11) for heating a user end (21) when the hot water in the collection well (100) cannot meet the needs of the user end (21), and a secondary heating component (12) for heating the user end (21) when the hot water in the collection well (100) meets the needs of the user end (21); The heat regulating unit (2) comprises a heat conducting component (23) for connecting a main heat supply component (11) and a secondary heat supply component (12) to a user end (21), and a heat regulating component (24) arranged inside the heat conducting component (23) for switching the heat supply between the main heat supply component (11) and the secondary heat supply component (12).

2. The medium-deep geothermal cascade utilization and regulation device according to claim 1 is characterized by: The main heating component (11) comprises: A first plate heat exchanger (112) is disposed at one end of the main liquid extraction pipe (102) opposite to the collection well (100); A ground source heat pump (111), connected to the main liquid extraction pipe (102) and located between the filter (103) and the first plate heat exchanger (112), for heating water in the main liquid extraction pipe (102); A first return pipe (114) is provided between the first plate heat exchanger (112) and the reinjection well (101), and is used to guide the water entering the first plate heat exchanger (112) from the main liquid extraction pipe (102) into the reinjection well (101); The first water inlet and outlet pipe (113) is provided between the first plate heat exchanger (112) and the user end (21) and is used to exchange water after heat exchange in the first plate heat exchanger (112) with water after use at the user end (21).

3. The medium-deep geothermal cascade utilization and regulation device according to claim 2 is characterized by: The secondary heat supply component (12) comprises: A secondary liquid extraction pipe (121), one end of which is connected to the main liquid extraction pipe (102) between the ground source heat pump (111) and the filter (103); A second plate heat exchanger (122) is connected to the water outlet of the secondary liquid extraction pipe (121); A second return pipe (124) is provided between the second plate heat exchanger (122) and the reinjection well (101), and is used to guide the water entering the second plate heat exchanger (122) through the secondary liquid extraction pipe (121) into the reinjection well (101); The second water inlet and outlet pipe (123) is provided between the second plate heat exchanger (122) and the user end (21) and is used to exchange water after heat exchange in the second plate heat exchanger (122) with water after use at the user end (21).

4. The medium-deep geothermal cascade utilization and regulation device according to claim 3 is characterized by: The heat conducting component (23) comprises: A disc (231) fixedly connected to one side of the inside of the user end (21); The inner circular cavity (232) is arranged inside the circular disk (231), the first water inlet and outlet pipe (113) and the second water inlet and outlet pipe (123) are both connected to the inner circular cavity (232), and the inlet and outlet of the first water inlet and outlet pipe (113) and the inlet and outlet of the second water inlet and outlet pipe (123) are at the same level in the inner circular cavity (232); A hot water inlet pipe (234), one end of which is connected to the inner circular cavity (232) and the other end of which is connected to the water inlet of the geothermal pipe (22); The hot water outlet pipe (235) has one end connected to the inner circular cavity (232) and the other end connected to the water outlet of the geothermal pipe (22).

5. The medium-deep geothermal cascade utilization and regulation device according to claim 4 is characterized in that: The heat regulating component (24) comprises: A rotating disk (241) is rotatably connected to the inner circular cavity (232), and a sealing gasket is provided between the outer side of the rotating disk (241) and the inner circular cavity (232); A main inlet pipe (242) is arranged inside the rotating disk (241), the water inlet end of the main inlet pipe (242) corresponds to the first water inlet and outlet pipe (113), and the water outlet end of the main inlet pipe (242) corresponds to the hot water inlet pipe (234); The main outlet pipe (2421) is arranged inside the rotating disk (241), the water outlet end of the main outlet pipe (2421) corresponds to the first water inlet and outlet pipe (113), and the water inlet end of the main inlet pipe (242) corresponds to the hot water outlet pipe (235).

6. The medium-deep geothermal cascade utilization and regulation device according to claim 5 is characterized by: The heat regulating component (24) further comprises: A secondary inlet pipe (243) is arranged inside the rotating disk (241), the water inlet end of the secondary inlet pipe (243) corresponds to the second water inlet and outlet pipes (123), and the water outlet end of the secondary inlet pipe (243) corresponds to the hot water inlet pipe (234); The secondary outlet pipe (2431) is arranged inside the rotating disk (241); the water outlet end of the secondary inlet pipe (243) corresponds to the second inlet and outlet water pipes (123); and the water inlet end of the secondary inlet pipe (243) corresponds to the hot water outlet pipe (235).

7. The medium-deep geothermal cascade utilization and regulation device according to claim 5 is characterized by: The heat regulating assembly (24) further comprises an adjusting shaft (25), wherein the adjusting shaft (25) is fixedly connected to one end of the rotating disk (241) and passes through the disk (231) from the inner circular cavity (232) to the outside, and is used for switching the position of the rotating disk (241). A reserved hole (233) is provided outside the adjusting shaft (25) and inside the disk (231).

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