Automatic drainage system of well pit

Abstract

The utility model relates to the field of mining, in particular to an automatic drainage system for a well pit, which can realize automatic drainage of the well pit of a mine vertical well, does not need to be attended and saves manpower. The system comprises a power supply module (110), a controller (120) and an underground water pumping module (130), wherein the controller (120) is connected with the power supply module (110) and the underground water pumping module (130); the power supply module (110) is used for supplying power to the automatic drainage system of the well pit; the underground water pumping module (130) is used for pumping water in a well pit into a water sump, and the water sump is arranged on the ground; the controller (120) is used for controlling starting and stopping of the underground water pumping module (130).

Description

Technical Field

[0001] This disclosure relates to the field of mining, and more specifically, to an automatic drainage system for well pits. Background Technology

[0002] A mine shaft's bottom chute (also called a bottom chute or unloading port) is a space or recess at the bottom of the shaft used to collect and temporarily store ore, waste rock, or other materials transported downwards through the shaft. Because of its location at the bottom, the bottom chute is prone to water accumulation if not properly managed. In a mine shaft, water from the various sections (upper section, drilling section, support section, connecting section, lower shaft entrance section, etc.) converges in the bottom chute, interfering with the swing of the hoist's tail rope and affecting the safe operation of the hoist. If the water level in the bottom chute exceeds the height of the hoist's headgate, it can flood the equipment, causing damage and even accidents, posing a significant threat to production and personnel safety.

[0003] The relevant technologies typically include a series of complex measures, from groundwater pretreatment to water treatment during well drilling, and then to the actual drainage operations inside the well. This process also involves surface pre-grouting, wellpoint dewatering, borehole drainage, backfill and infill grouting for water sealing, and the use of buckets and pumps for drainage.

[0004] The main challenges facing these technologies include high labor and material costs and excessively long drainage times, especially during initial groundwater treatment. Furthermore, they cannot fully cope with extreme hydrogeological conditions, such as sudden large inflows of water, which could lead to construction delays and increased costs. From an environmental perspective, the seepage of grouting materials may affect groundwater quality. Utility Model Content

[0005] The purpose of this disclosure is to provide an automatic drainage system for mine shafts, which can automatically drain water from mine shafts without the need for personnel on duty, thus saving manpower.

[0006] To achieve the above objectives, this disclosure provides an automatic drainage system for wells, including a power module, a controller, and a downhole pumping module, wherein the controller is connected to both the power module and the downhole pumping module;

[0007] The power module is used to supply power to the automatic drainage system in the well.

[0008] The downhole pumping module is used to pump water from the well into a water tank, which is located on the ground.

[0009] The controller is used to control the start and stop of the downhole pumping module.

[0010] Optionally, it includes a surface pumping module, which is connected to the controller;

[0011] The well pumping module is used to pump water from the water tank;

[0012] The controller is used to control the start and stop of the well pumping module.

[0013] Optionally, it includes a liquid level monitoring module, which is connected to the controller;

[0014] The liquid level monitoring module is used to monitor the liquid level in the well and the liquid level in the water tank, and send corresponding signals to the controller according to the liquid level in the well and the liquid level in the water tank;

[0015] The controller is used to receive signals sent by the liquid level monitoring module and control the start and stop of the downhole pumping module and the surface pumping module according to the signals.

[0016] Optionally, the power module includes a power supply, a circuit breaker, and a transformer. The circuit breaker is connected to both the power supply and the transformer, and the power module is connected to the controller through the transformer.

[0017] The circuit breaker is used to turn the power supply on and off;

[0018] The transformer is used to convert the high voltage provided by the power source into a low voltage.

[0019] Optionally, the power module further includes a power indicator light, which is connected to the circuit breaker;

[0020] The power indicator light is used to indicate the on and off states of the power supply.

[0021] Optionally, the downhole pumping module includes a first relay, a contactor, and a downhole pump. The contactor is connected to both the first relay and the downhole pump. The downhole pumping module is connected to the controller via the first relay.

[0022] The first relay is used to switch the circuit between the downhole pumping module and the controller;

[0023] The contactor is used to switch the circuit between the downhole pump and the first relay on and off.

[0024] The downhole pump is used to pump water from the well into the water tank;

[0025] The controller is used to control the closing and opening of the contacts of the first relay to control the start and stop of the downhole pump.

[0026] Optionally, the surface pumping module includes a second relay, a frequency converter, and a surface pump. The frequency converter is connected to both the second relay and the surface pump. The surface pumping module is connected to the controller via the second relay.

[0027] The second relay is used to switch the circuit between the well pumping module and the controller;

[0028] The frequency converter is used to reduce the instantaneous current of the motor of the well pump during startup;

[0029] The well pump is used to extract water from the water tank;

[0030] The controller is used to control the closing and opening of the contacts of the second relay to control the start and stop of the well pump.

[0031] Optionally, the liquid level monitoring module includes a first liquid level relay and an alarm, wherein the first liquid level relay is connected to the alarm, and the first liquid level relay is also connected to the power module and the controller.

[0032] The alarm is used to output an alarm prompt when the liquid level in the well rises to a first preset liquid level;

[0033] The first liquid level relay is used to trigger the alarm to output the alarm prompt when the liquid level in the well rises to a first preset liquid level.

[0034] Optionally, the liquid level monitoring module includes a second liquid level relay, which is connected to both the power module and the controller;

[0035] The second liquid level relay is used to send a first signal to the controller when the liquid level in the well rises to a second preset liquid level, wherein the second preset liquid level is lower than the first preset liquid level;

[0036] The controller is used to control the downhole pumping module to start pumping water according to the first signal;

[0037] The second liquid level relay is used to send a second signal to the controller when the liquid level in the well drops to a third preset liquid level, wherein the third preset liquid level is lower than the second preset liquid level;

[0038] The controller is used to control the downhole pumping module to stop pumping water according to the second signal.

[0039] Optionally, the liquid level monitoring module includes a third liquid level relay, which is connected to both the power module and the controller;

[0040] The third liquid level relay is used to send a third signal to the controller when the liquid level in the well rises to a fourth preset liquid level, wherein the fourth preset liquid level is lower than the third preset liquid level.

[0041] The controller is used to control the downhole pumping module to stop pumping water according to the third signal.

[0042] Optionally, the liquid level monitoring module includes a fourth liquid level relay, which is connected to both the power supply module and the controller;

[0043] The fourth liquid level relay is used to send a fourth signal to the controller when the liquid level in the water tank rises to a fifth preset liquid level.

[0044] The controller is used to control the well pumping module to start pumping water according to the fourth signal.

[0045] The above technical solution enables fully automated monitoring and drainage of liquid levels in mine shafts, eliminating the need for 24 / 7 personnel on-site. This not only improves drainage efficiency but also saves manpower and provides reliable safety guarantees.

[0046] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0047] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0048] Figure 1 This is a structural diagram of an automatic drainage system for wells according to an exemplary embodiment of the present disclosure;

[0049] Figure 2 This is a structural diagram of an automatic drainage system for wells according to an exemplary embodiment of the present disclosure;

[0050] Figure 3 This is a structural diagram of an automatic drainage system for a well, according to another exemplary embodiment of the present disclosure;

[0051] Figure 4 This is a structural diagram of an automatic drainage system for a well, according to another exemplary embodiment of the present disclosure.

[0052] Explanation of reference numerals in the attached figures

[0053] Power module 110, power supply 111, circuit breaker 112, transformer 113, power indicator light 114, controller 120, downhole pumping module 130, first relay 131, contactor 132, downhole pump 133, surface pumping module 140, second relay 141, frequency converter 142, surface pump 143, liquid level monitoring module 150, first liquid level relay 151, alarm 1511, second liquid level relay 152, third liquid level relay 153, fourth liquid level relay 154. Detailed Implementation

[0054] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0055] The terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not indicate any order or importance. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0056] One possible application scenario of the automatic drainage system for mine shafts provided in this disclosure is that in a mine shaft, the head gates in each section may cause water to accumulate in the shaft, and the automatic drainage system for the shaft needs to drain this water to ensure the normal operation of the mine.

[0057] Figure 1 This is a structural diagram illustrating an automatic drainage system for a manhole according to an exemplary embodiment of this disclosure. (Refer to...) Figure 1 The automatic drainage system for well pits includes a power module 110, a controller 120, and a downhole pumping module 130. The controller 120 is connected to both the power module 110 and the downhole pumping module 130. The power module 110 is used to supply power to the automatic drainage system for well pits. The downhole pumping module 130 is used to pump water from the well pit into a water tank, which is located on the ground. The controller 120 is used to control the start and stop of the downhole pumping module 130.

[0058] Here, the power module 110 supplies power to the entire automatic drainage system, ensuring its proper operation. Operators simply need to activate the power module 110, and the system will run automatically. The controller 120 can be a PLC (Programmable Logic Controller), microcontroller, industrial computer, single-chip microcomputer, or embedded system, etc. The downhole pumping module 130 can be installed inside the well to pump water from the well to a surface water tank.

[0059] One possible operating procedure for this automatic drainage system in the mine shaft is as follows: First, the power module 110 provides electrical energy to the entire system. The controller 120 monitors the liquid level in the shaft in real time. Once the liquid level reaches the set start-up threshold, the controller 120 instructs the underground pumping module 130 to start working and pump out the accumulated water from the shaft. The underground pumping module 130 then transports the water to a surface water tank. When the liquid level drops to the set stop threshold, the controller 120 intervenes again, instructing the underground pumping module 130 to stop working, preventing the underground pumping module 130 from operating without water. This process can be automatically repeated as needed to ensure that the normal operation of the mine shaft is not disturbed by accumulated water.

[0060] The above technical solution enables fully automated monitoring and drainage of liquid levels in mine shafts, eliminating the need for 24 / 7 personnel on-site. This not only improves drainage efficiency but also saves manpower and provides reliable safety guarantees.

[0061] In one embodiment, such as Figure 2 As shown, the well pit automatic drainage system includes a well surface pumping module 140, which is connected to a controller 120. The well surface pumping module 140 is used to pump water from the water tank. The controller 120 is used to control the start and stop of the well surface pumping module 140.

[0062] Here, the well pumping module is connected to the water tank and is responsible for transferring the water in the water tank to a designated location.

[0063] One possible operating procedure for the automatic drainage system in the well is as follows: the power module 110 provides the necessary power, the controller 120 monitors the changes in the liquid level in the water tank, and once the liquid level in the water tank reaches the set start-up condition, the controller 120 will issue a command to start the well pumping module 140; the well pumping module 140 begins to pump water from the water tank to the designated location; when the liquid level drops to the preset stop condition, the controller 120 will stop the operation of the well pumping module 140.

[0064] Separating the pumping module into an above-ground pumping module 140 and a down-ground pumping module 130 can improve the efficiency of automatic drainage of the well and increase operational flexibility.

[0065] In one embodiment, such as Figure 3As shown, the automatic drainage system for the well pit includes a liquid level monitoring module 150, which is connected to a controller 120. The liquid level monitoring module 150 is used to monitor the liquid level in the well pit and the liquid level in the water tank, and sends corresponding signals to the controller 120 according to the liquid level in the well pit and the liquid level in the water tank. The controller 120 is used to receive the signals sent by the liquid level monitoring module 150, and control the start and stop of the downhole pumping module 130 and the surface pumping module 140 according to the signals.

[0066] Here, the liquid level monitoring module 150 is connected to the wellbore and the water tank, used to monitor the liquid level in the wellbore and the water tank and collect liquid level information, and send this information to the controller 120. The controller 120 receives the signal from the liquid level monitoring module 150 regarding the liquid level in the wellbore, and controls when to start or stop the downhole pumping module 130 accordingly; the controller 120 also receives the signal from the liquid level monitoring module 150 regarding the liquid level in the water tank, and controls when to start or stop the surface pumping module 140 accordingly, so as to maintain the liquid level in the wellbore and the water tank within a suitable range.

[0067] One possible operating process of the automatic drainage system for the well pit is as follows: the liquid level monitoring module 150 continuously monitors the liquid level in the well pit and the water tank, and sends this information to the controller 120; the controller 120 determines whether to start the downhole pumping module 130 based on the received liquid level information of the well pit; if the liquid level in the well pit reaches the preset start condition, the controller 120 will issue a command to start the downhole pumping module 130 to begin pumping water from the well pit to the water tank; when the liquid level in the well pit drops to the preset stop condition, the controller 120 will stop the operation of the downhole pumping module 130; at the same time, if the liquid level in the water tank reaches the preset start condition, the controller 120 will issue a command to start the surface pumping module 140 to begin pumping water from the water tank to a designated location, realizing automatic drainage of the well pit; when the liquid level in the water tank drops to the preset stop condition, the controller 120 will stop the operation of the downhole pumping module 130.

[0068] By adding a liquid level monitoring module 150, the liquid level changes in the well and water tank can be monitored in real time, and communication with the controller 120 can be achieved to realize the automatic control of the start and stop of the surface pumping module 140 and the downhole pumping module 130, thereby improving the efficiency of automatic drainage of the well.

[0069] In one embodiment, such as Figure 4 As shown, the power module 110 includes a power supply 111, a circuit breaker 112, and a transformer 113. The circuit breaker 112 is connected to both the power supply 111 and the transformer 113. The power module 110 is connected to the controller 120 through the transformer 113. The circuit breaker 112 is used to turn the power supply 111 on and off. The transformer 113 is used to convert the high voltage provided by the power supply 111 to a low voltage.

[0070] One possible operating procedure for the automatic drainage system in the well pit is as follows: Power supply 111 provides a stable power supply to the system. Circuit breaker 112 is used to turn power supply 111 on or off, serving as overload protection and safety control. Transformer 113 converts the high voltage supplied by power supply 111 to the low voltage required by the automatic drainage system, for example, stepping down 380V three-phase AC voltage to 220V AC voltage. When the operator closes circuit breaker 112, power supply 111 is energized, and the automatic drainage system operates; when the operator opens circuit breaker 112, power supply 111 stops supplying power, and the automatic drainage system stops operating.

[0071] In one embodiment, such as Figure 4 As shown, the power module 110 also includes a power indicator light 111, which is connected to the circuit breaker 112. The power indicator light 111 is used to indicate the on and off states of the power supply 111.

[0072] Here, when the power indicator light 111 is working normally, the power indicator light 111 will be lit to indicate that the power 111 is turned on. If the power indicator light 111 is off, it means that the power 111 is turned off.

[0073] In one embodiment, such as Figure 4 As shown, the downhole pumping module 130 includes a first relay 131, a contactor 132, and a downhole pump 133. The contactor 132 is connected to both the first relay 131 and the downhole pump 133. The downhole pumping module 130 is connected to the controller 120 through the first relay 131. The first relay 131 is used to switch the circuit between the downhole pumping module 130 and the controller 120. The contactor 132 is used to switch the circuit between the downhole pump 133 and the first relay 131. The downhole pump 133 is used to pump water from the well into the water tank. The controller 120 is used to control the closing and opening of the contacts of the first relay 131 to control the start and stop of the downhole pump 133.

[0074] Here, the first relay 131 acts as a circuit switch between the controller 120 and the downhole pumping module 130. When the controller 120 detects that the well requires pumping, it controls the first relay 131 to close, thereby allowing current to flow to the downhole pump 133. When the first relay 131 closes, the contactor 132 also automatically engages. Because the downhole pump 133 has a high operating power, directly using a relay to control its start and stop may lead to unstable control. Therefore, the contactor 132 is used for control to ensure stable and reliable operation.

[0075] In one embodiment, such as Figure 4As shown, the well pumping module 140 includes a second relay 141, a frequency converter 142, and a well pump 143. The frequency converter 142 is connected to both the second relay 141 and the well pump 143. The well pumping module 140 is connected to the controller 120 through the second relay 141. The second relay 141 is used to switch the circuit between the well pumping module 140 and the controller 120. The frequency converter 142 is used to reduce the instantaneous current of the motor of the well pump 143 during startup. The well pump 143 is used to pump water from the water tank. The controller 120 is used to control the closing and opening of the contacts of the second relay 141 to control the start and stop of the well pump 143.

[0076] Here, the second relay 141 acts as a circuit switch between the controller 120 and the surface pumping module 140. When the controller 120 detects that the water tank needs pumping, it controls the second relay 141 to close, thereby allowing current to flow to the surface pump 143. When the second relay 141 is closed, the frequency converter 142 is activated. Since the operating power of the surface pump 143 is greater than that of the downhole pump 133, a sudden increase in power may lead to current instability. To solve this problem, the frequency converter 142 is introduced to regulate the operating power of the surface pump 143, gradually increasing it to maintain current stability.

[0077] In one embodiment, such as Figure 4 As shown, the liquid level monitoring module 150 includes a first liquid level relay 151 and an alarm 1511. The first liquid level relay 151 is connected to the alarm 1511, and the first liquid level relay 151 is also connected to the power module 110 and the controller 120. The alarm 1511 is used to output an alarm prompt when the liquid level in the well rises to a first preset liquid level. The first liquid level relay 151 is used to trigger the alarm 1511 to output an alarm prompt when the liquid level in the well rises to the first preset liquid level.

[0078] Here, the alarm output by alarm 1511 can be an audible alarm, a flashing light, or a text prompt on a digital display screen. The working principle of the first liquid level relay 151 can be as follows: it measures the liquid level through electrodes; when the first liquid level contacts the electrodes, a conductive path is formed, triggering the relay. Alternatively, it can utilize a float or float assembly; as the liquid level rises, the float rises accordingly, ultimately triggering the first liquid level relay 151. When the liquid level in the well reaches the first preset level, it indicates that the liquid level in the well has reached a critical value, potentially indicating an extreme situation. At this time, the downhole pump 133 may not be able to remove the excess water in time, requiring immediate dispatch of rescue personnel to resolve the issue.

[0079] In one embodiment, such as Figure 4As shown, the liquid level monitoring module 150 includes a second liquid level relay 152, which is connected to both the power module 110 and the controller 120. The second liquid level relay 152 is used to send a first signal to the controller 120 when the liquid level in the wellbore rises to a second preset liquid level, indicating that the second preset liquid level is lower than the first preset liquid level. The controller 120 is used to control the downhole pumping module 130 to start pumping water based on the first signal. The second liquid level relay 152 is also used to send a second signal to the controller 120 when the liquid level in the wellbore drops to a third preset liquid level, indicating that the third preset liquid level is lower than the second preset liquid level. The controller 120 is used to control the downhole pumping module 130 to stop pumping water based on the second signal.

[0080] Here, the second liquid level relay 152 is of the same type as the first liquid level relay 151. The second liquid level relay 152 detects changes in the liquid level in the wellbore. When the liquid level rises to a preset second level, it sends a first signal to the controller 120. Upon receiving the first signal, the controller 120 starts the downhole pumping module 130 to pump water, thereby lowering the liquid level in the wellbore. Once the liquid level drops below a third preset level, the second liquid level relay 152 sends a second signal to the controller 120, indicating that the liquid level has reached a safe level and pumping is no longer necessary. Based on the second signal, the controller 120 stops the operation of the downhole pumping module 130.

[0081] In one embodiment, such as Figure 4 As shown, the liquid level monitoring module 150 includes a third liquid level relay 153, which is connected to both the power supply module 110 and the controller 120. The third liquid level relay 153 is used to send a third signal to the controller 120 when the liquid level in the well rises to a fourth preset liquid level, and the fourth preset liquid level is lower than the third preset liquid level. The controller 120 is used to control the downhole pumping module 130 to stop pumping according to the third signal.

[0082] Here, the third liquid level relay 153 is of the same type as the first liquid level relay 151. The third liquid level relay 153 detects changes in the liquid level in the wellbore. When the liquid level rises to a preset fourth liquid level, it sends a third signal to the controller 120. Upon receiving the third signal, the controller 120 stops the operation of the downhole pumping module 130. The fourth preset liquid level is slightly higher than the liquid level of the downhole pump 133 to ensure that the controller 120 can promptly stop the operation of the downhole pumping module 130 after receiving the third signal from the third liquid level relay 153, thus preventing damage to the downhole pump 133 due to idling.

[0083] In one embodiment, such as Figure 4As shown, the liquid level monitoring module 150 includes a fourth liquid level relay 154, which is connected to both the power supply module 110 and the controller 120. The fourth liquid level relay 154 is used to send a fourth signal to the controller 120 when the liquid level in the water tank rises to a fifth preset liquid level. The controller 120 is used to control the well pumping module 140 to start pumping water according to the fourth signal.

[0084] Here, the fourth liquid level relay 154 is of the same type as the first liquid level relay 151. The fourth liquid level relay 154 detects changes in the liquid level in the water tank, and when the liquid level rises to a preset fifth preset level, it sends a fourth signal to the controller 120. After receiving the fourth signal, the controller 120 starts the well pumping module 140 to pump water to lower the liquid level in the water tank.

[0085] The aforementioned automatic drainage system for mine pits monitors the liquid level in the pits and water tanks in real time through the liquid level monitoring module 150, and automatically controls the start and stop of the underground pumping module 130 and the surface pumping module 140. This automates the drainage process, reduces manual intervention, and improves drainage efficiency and safety. By setting a warning liquid level and linking it with the alarm 1511, the system can issue an alarm in a timely manner when the liquid level is too high, preventing potential safety risks and providing additional protection for mine safety.

[0086] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0087] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0088] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A well pit automatic drainage system characterized by, The automatic well drainage system comprises a power module (110), a controller (120) and a downhole water pumping module (130), the controller (120) is connected with the power module (110) and the downhole water pumping module (130); The power module (110) is used for supplying power for the automatic well drainage system; The downhole water pumping module (130) is used for pumping water in the well to a water storage tank, and the water storage tank is arranged on the ground; The controller (120) is used for controlling the start and stop of the downhole water pumping module (130).

2. The well-nest automatic drainage system of claim 1, wherein, The automatic well drainage system comprises an uphole water pumping module (140), and the uphole water pumping module (140) is connected with the controller (120); The uphole water pumping module (140) is used for pumping water in the water storage tank; The controller (120) is used for controlling the start and stop of the uphole water pumping module (140).

3. The well-nest automatic drainage system of claim 2, wherein, The automatic well drainage system comprises a liquid level monitoring module (150), and the liquid level monitoring module (150) is connected with the controller (120); The liquid level monitoring module (150) is used for monitoring the liquid levels in the well and the water storage tank, and sending corresponding signals to the controller (120) according to the liquid levels in the well and the water storage tank; The controller (120) is used for receiving the signals sent by the liquid level monitoring module (150), and controlling the start and stop of the downhole water pumping module (130) and the uphole water pumping module (140) according to the signals.

4. The well-nest automatic drainage system of claim 1, wherein, The power module (110) comprises a power supply (111), a circuit breaker (112) and a transformer (113), the circuit breaker (112) is connected with the power supply (111) and the transformer (113), and the power module (110) is connected with the controller (120) through the transformer (113); The circuit breaker (112) is used for turning on and off the power supply (111); The transformer (113) is used for converting high voltage provided by the power supply (111) into low voltage.

5. The well nest automatic drain system of claim 4, wherein, The power module (110) further comprises a power indicator (114), and the power indicator (114) is connected with the circuit breaker (112); The power indicator (114) is used for indicating the on and off states of the power supply (111).

6. The well-nest automatic drainage system of claim 1, wherein, The downhole water pumping module (130) comprises a first relay (131), a contactor (132) and a downhole pump (133), the contactor (132) is connected with the first relay (131) and the downhole pump (133), and the downhole water pumping module (130) is connected with the controller (120) through the first relay (131); The first relay (131) is used for turning on and off the circuit between the downhole water pumping module (130) and the controller (120); The contactor (132) is used for turning on and off the circuit between the downhole pump (133) and the first relay (131); The downhole pump (133) is used for pumping water in the well to the water storage tank; The controller (120) is configured to control the closing and opening of contacts of the first relay (131) to control the starting and stopping of the downhole pump (133).

7. The well-nest automatic drain system of claim 2, wherein, The uphole pumping module (140) comprises a second relay (141), a frequency converter (142) and an uphole pump (143), the frequency converter (142) being connected with the second relay (141) and the uphole pump (143), and the uphole pumping module (140) being connected with the controller (120) through the second relay (141); The second relay (141) is configured to turn on and off a circuit between the uphole pumping module (140) and the controller (120); The frequency converter (142) is configured to reduce the instantaneous current of a motor of the uphole pump (143) during starting; The uphole pump (143) is configured to pump water in the water sump; The controller (120) is configured to control the closing and opening of contacts of the second relay (141) to control the starting and stopping of the uphole pump (143).

8. The well-nest automatic drain system of claim 3, wherein, The liquid level monitoring module (150) comprises a first liquid level relay (151) and an alarm (1511), the first liquid level relay (151) being connected with the alarm (1511), and the first liquid level relay (151) being connected with the power module (110) and the controller (120); The alarm (1511) is configured to output an alarm prompt when the liquid level in the well cavity rises to a first preset liquid level; The first liquid level relay (151) is configured to trigger the alarm (1511) to output the alarm prompt when the liquid level in the well cavity rises to the first preset liquid level.

9. The well-nest automatic drain system of claim 8, wherein, The liquid level monitoring module (150) comprises a second liquid level relay (152), the second liquid level relay (152) being connected with the power module (110) and the controller (120); The second liquid level relay (152) is configured to send a first signal to the controller (120) when the liquid level in the well cavity rises to a second preset liquid level, the second preset liquid level being lower than the first preset liquid level; The controller (120) is configured to control the downhole pumping module (130) to start pumping water according to the first signal; The second liquid level relay (152) is configured to send a second signal to the controller (120) when the liquid level in the well cavity drops to a third preset liquid level, the third preset liquid level being lower than the second preset liquid level; The controller (120) is configured to control the downhole pumping module (130) to stop pumping water according to the second signal.

10. The well nest automatic drain system of claim 9, wherein, The liquid level monitoring module (150) comprises a third liquid level relay (153), the third liquid level relay (153) being connected with the power module (110) and the controller (120); The third liquid level relay (153) is configured to send a third signal to the controller (120) when the liquid level in the sump rises to a fourth preset liquid level, which is lower than the third preset liquid level. The controller (120) is configured to control the downhole water pumping module (130) to stop pumping water according to the third signal.

11. The well-nest automatic drain system of claim 8, wherein, The liquid level monitoring module (150) comprises a fourth liquid level relay (154) connected to the power supply module (110) and the controller (120). The fourth liquid level relay (154) is configured to send a fourth signal to the controller (120) when the liquid level in the sump rises to a fifth preset liquid level. The controller (120) is configured to control the uphole water pumping module (140) to start pumping water according to the fourth signal.

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