An unattended submersible pump automatic drainage device

Abstract

This invention relates to an unattended submersible pump automatic drainage device, belonging to the field of coal mine drainage technology. It includes a water tank for receiving and storing water discharged from a fully mechanized mining face, a submersible pump installed inside the water tank for drainage, a water level stop sensor installed inside the water tank, a water level start sensor installed inside the water tank and located above the water level stop sensor, and a control box installed at the top of the water tank. The control box is connected to the water level stop sensor and the water level start sensor via wires and controls the start and stop of the submersible pump based on received information. A water inlet pipe is installed on the side of the water tank for injecting water, with the inlet pipe higher than the water level start sensor. A drainage pipe is installed on the top of the submersible pump, connecting to the outside of the water tank. Its advantages are that the entire automatic drainage device requires no manual supervision, automatically drains and stops drainage, and is more convenient.

Description

Technical Field

[0001] This invention relates to the field of coal mine drainage technology, and in particular to an unattended submersible pump automatic drainage device. Background Technology

[0002] The full name of a fully mechanized longwall mining face is a comprehensive mechanized coal mining face, which is the primary production site for coal mining. Freshly mined raw coal contains a large amount of coal dust and other impurities, and is prone to dust generation when dry. Washing with water moistens the coal surface, effectively reducing dust generation during transportation and storage, lowering air pollution, and protecting the health of coal miners, reducing the risk of occupational diseases. Raw coal contains non-combustible materials, harmful substances, and sulfur impurities. Coal washing can remove 50%–80% of the ash and 30%–40% of the total sulfur, reducing combustion pollutant emissions and improving the calorific value and quality of the coal. Simultaneously, water washing helps in coal grading, separating different grades of coal such as lignite, bituminous coal, and anthracite, facilitating their rational utilization for different purposes. Moistened coal is less prone to spontaneous combustion during transportation, also reducing the risk of transportation accidents. Water is commonly sprayed onto coal cars in railway transportation to prevent dust generation and spontaneous combustion.

[0003] Because the coal mining process requires a large amount of water, the pump room in the return air roadway of the underground mining area needs to continuously drain water from the fully mechanized mining face. The pump room needs to be staffed with personnel to guard the drainage equipment, which not only results in high labor costs and heavy duty intensity, but also poses potential risks such as untimely response of human operation, affecting the stability and reliability of the drainage system. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an unattended submersible pump automatic drainage device, which solves the technical problems of high labor costs, high duty intensity and potential risks such as untimely response of human operation caused by the need to arrange personnel to guard the drainage equipment in the pump room, thus affecting the stability and reliability of the drainage system.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] This invention provides an unattended submersible pump automatic drainage device, including a water tank for receiving and storing water discharged from a fully mechanized mining face, a submersible pump installed in the water tank for draining water outward, a water level stop sensor installed inside the water tank, a water level start sensor installed inside the water tank and located above the water level stop sensor, and a control box installed at the top of the water tank.

[0009] The control box is connected to the water level stop sensor and the water level start sensor via wires, and controls the start and stop of the submersible pump based on the received information.

[0010] The water tank is equipped with a water inlet pipe at its side end for injecting water into the tank. The height of the water inlet pipe is higher than the water level sensor. The top of the submersible pump is equipped with a drain pipe that connects to the outside of the water tank.

[0011] This invention proposes an unattended submersible pump automatic drainage device. When using this device, water discharged from the longwall mining face flows directly into the water storage tank through the inlet pipe. When the water level reaches the height of the water level activation sensor, the sensor transmits a signal to the control box via a wire. The control box then controls the submersible pump to operate, thereby pumping out the water and discharging it through the drain pipe. As the water is gradually drained, the water level in the storage tank reaches the height of the water level stop sensor. At this point, the stop sensor transmits a signal to the control box via a wire, and the control box stops the submersible pump. This design allows the entire automatic drainage device to operate without manual supervision, automatically draining and stopping water, making it more convenient, avoiding fatigue-related errors, reducing the probability of delayed pumping, and effectively preventing flooding accidents caused by untimely manual drainage. It improves the safety factor of the pumping and drainage process in the pumping station, making the drainage system more convenient, faster, simpler, more efficient, and highly practical.

[0012] Optionally, the top of the water tank has two through holes spaced apart. A regulating pipe is vertically slidably inserted into the water tank through the through holes. The water level stop sensor and the water level start sensor are fixed to the lower end of the regulating pipe. A limiting piece is provided at the top of the regulating pipe that abuts against the opening of the through hole. The wire connected to the control box extends into the water tank along the inside of the regulating pipe and is connected to the water level stop sensor and the water level start sensor.

[0013] By opening two through holes at the top of the water tank, and vertically sliding an adjusting pipe inside the through holes, the adjusting pipe cannot be fully inserted into the water tank due to the limitation of the top limiting plate. The wires extending from the control box are directly connected to the water level stop sensor and the water level start sensor along the inside of the adjusting pipe. On the one hand, the wires can be protected to reduce water vapor intrusion. On the other hand, the water level stop sensor and the water level start sensor can be pulled out of the water tank by vertically moving the adjusting pipe upward, so as to carry out maintenance and replacement more conveniently.

[0014] Optionally, a positioning clamp for positioning the regulating pipe is provided on the top of the water tank on one side of the through hole. The positioning clamp includes two clamping pieces that are rotatably connected on the same axis. The middle of the two clamping pieces forms a clamping groove for holding the regulating pipe. The ends of the two clamping pieces away from their own axis of rotation are fixedly connected by bolts.

[0015] By installing a positioning clamp at the top of the water tank, two clamping plates rotate to hold the regulating pipe in the clamping groove, and then fix it with bolts, the regulating pipe can be moved vertically to any height and then fixed by the positioning clamp, thus realizing the adjustment of the water level line for starting and stopping the submersible pump, which is more convenient.

[0016] Optionally, a cinder filter basket is provided inside the water tank below the outlet of the inlet pipe. The cinder filter basket has filter holes evenly arranged in an array. The cinder filter basket receives the water flow discharged from the inlet pipe and filters the cinder.

[0017] The water discharged from the fully mechanized mining face contains a large amount of coal slag and other impurities. If it is discharged directly into the water storage tank, the coal slag and other impurities will accumulate at the bottom of the water storage tank, which is inconvenient to clean and can easily affect the operation of the submersible pump. In this solution, a coal slag filter basket is installed on the inner wall of the water storage tank. The coal slag filter basket is located below the outlet of the water inlet pipe. That is, after the water flows in along the water inlet pipe, it will be sprayed directly into the coal slag filter basket. The coal slag and other impurities will be filtered out and left behind. The staff only needs to clean the coal slag filter basket periodically, which is more convenient.

[0018] Optionally, an operation window is provided on the top of the water tank above the water inlet pipe, and a lifting platform is vertically slidably provided in the water tank at the operation window, with the cinder filter basket fixed to the upper end of the lifting platform.

[0019] By opening an operation window at the top of the water storage tank and vertically sliding the lifting platform within it, the slag filter basket, once fixed to the platform, can move vertically along with it. After a period of use, once a significant amount of slag and other impurities accumulate in the filter basket, it can be moved vertically upwards and out of the water storage tank along the operation window. At this point, cleaning the slag and other impurities from the filter basket becomes much easier.

[0020] Optionally, the water storage tank is vertically equipped with a vertical sliding rail at the operation window, the lifting platform is vertically slidably connected to the vertical sliding rail and its side end is close to the inner wall of the water storage tank, the top of the vertical sliding rail is equipped with a wire rope rewinder to drive the lifting platform to move vertically, the cinder filter basket is rotatably connected to the upper end of the lifting platform, and the rotating shaft of the cinder filter basket is located on the side of the lifting platform close to the inner wall of the water storage tank.

[0021] The lifting platform is moved vertically by a wire rope retractor and then vertically slidably connected to a vertical sliding rail, allowing the lifting platform to move stably close to the inner wall of the water tank. At the same time, a cinder filter basket is rotatably connected to the side of the lifting platform near the inner wall of the water tank. This allows the cinder filter basket to be rotated directly after the lifting platform is raised to the outside of the water tank, making it more convenient to pour out the cinder and other impurities directly.

[0022] Optionally, two sets of vertical sliding rails are provided and spaced apart. On the top of the water tank, on the side of the two sets of vertical sliding rails that are far apart from each other, there is a translation cylinder that drives the vertical sliding rails to move horizontally. The two sets of translation cylinders drive the vertical sliding rails to move horizontally to replace the cinder filter basket located below the outlet of the water inlet pipe.

[0023] Two translation cylinders drive two sets of vertical sliding rails to move horizontally, so that the two cinder filter baskets can be moved alternately to the lower side of the water outlet of the inlet pipe to perform filtration. When cleaning the cinder in one cinder filter basket, it can also be ensured that one cinder filter basket is still in the working position, which is more convenient.

[0024] Optionally, the side wall of the cinder filter basket away from the water inlet pipe is bent upwards and extends towards the side closer to the water inlet pipe.

[0025] By bending the side wall of the cinder filter basket away from the water inlet pipe upwards and tilting it towards the side closer to the water inlet pipe, a semi-enclosed state is formed, which reduces water splashing when water is sprayed from the outlet of the water inlet pipe and prevents the cinder from being impacted and detached from the cinder filter basket.

[0026] Optionally, the lifting platform includes a vertical plate that slides vertically against the inner wall of the water storage tank and a horizontal plate that is horizontally connected to the top of the vertical plate. The cinder filter basket is rotatably connected to the junction of the vertical plate and the horizontal plate. The cinder filter basket performs filtration when it is horizontally against the upper surface of the horizontal plate, and dumps cinder when it rotates 180 degrees and abuts against one end of the vertical plate.

[0027] By setting the lifting platform as a horizontal and vertical plate, the cinder filter basket is rotatably connected at the junction of the horizontal and vertical plates. When filtering is in progress, the cinder filter basket abuts against the inner wall of the water tank and the horizontal plate, making it more secure and stable. When it is time to clean the cinder, the entire lifting platform is moved up to detach from the water tank. At this time, the cinder filter basket can be rotated 180 degrees so that it abuts against one end of the vertical plate, and the cinder can be poured out directly, which is more convenient.

[0028] Optionally, the water tank has multiple hanging steel wires extending downward from the top wall, and the submersible pump is fixed to the lower end of the multiple hanging steel wires.

[0029] Submersible pumps generate significant vibrations during operation. This solution addresses this by installing multiple hanging steel cables at the top of the water tank, allowing the submersible pump to be directly suspended from the lower ends of these cables. This ensures the normal operation of the submersible pump while reducing the impact of its vibrations on the external environment and the pump itself.

[0030] (III) Beneficial Effects

[0031] The beneficial effects of this invention are as follows: The unattended submersible pump automatic drainage device of this invention allows water discharged from the fully mechanized mining face to directly enter the water storage tank along the inlet pipe. When the water level reaches the height of the water level activation sensor, the sensor transmits a signal to the control box via a wire. The control box then controls the submersible pump to operate, thereby pumping out the water and discharging it along the drain pipe. As the water is gradually drained, the water level in the water storage tank reaches the height of the water level stop sensor. At this point, the stop sensor transmits a signal to the control box via a wire, and the control box stops the submersible pump. This design eliminates the need for manual supervision of the entire automatic drainage device, enabling automatic drainage and stopping, which is more convenient, avoids fatigue-related misoperation, reduces the probability of delayed pumping, and effectively prevents flooding accidents caused by untimely manual drainage. It improves the safety factor of the pumping and drainage process in the pumping station, making the drainage system more convenient, faster, simpler, more efficient, and highly practical. Attached Figure Description

[0032] Figure 1 This is a first-view sectional view of an embodiment of the present invention;

[0033] Figure 2 for Figure 1 Enlarged view of point A;

[0034] Figure 3 for Figure 1 Enlarged view of point B;

[0035] Figure 4 This is a second-perspective sectional view of an embodiment of the present invention.

[0036] [Explanation of Labels in the Attached Image]

[0037] 1. Water tank / storage tank; 11. Inlet pipe; 12. Through hole; 13. Regulating pipe; 131. Limiting plate; 14. Positioning clamp; 141. Clamping piece; 142. Clamping groove; 15. Operating window; 16. Lifting platform; 161. Vertical plate; 162. Horizontal plate; 17. Vertical sliding rail; 18. Translation cylinder; 181. Wire rope rewinder; 19. Hanging wire; 2. Submersible pump; 21. Drainage pipe; 3. Water level stop sensor; 4. Water level start sensor; 5. Control box; 51. Wire; 6. Power supply box; 7. Cinder filter basket; 71. Filter hole. Detailed Implementation

[0038] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] The unattended submersible pump automatic drainage device proposed in this invention allows water discharged from the longwall mining face to directly enter the water storage tank along the inlet pipe. When the water level reaches the height of the water level activation sensor, the sensor transmits a signal to the control box via a wire. The control box then controls the submersible pump to operate, thereby pumping out the water and discharging it along the drain pipe. As the water is gradually drained, the water level in the water storage tank reaches the height of the water level stop sensor. At this point, the water level stop sensor transmits a signal to the control box via a wire, and the control box stops the submersible pump. This solution allows the entire automatic drainage device to operate automatically without manual supervision, making it more convenient, avoiding fatigue-related errors, reducing the probability of delayed pumping, and effectively preventing flooding accidents caused by untimely manual drainage. It improves the safety factor of the pumping and drainage process in the pump room, making the drainage system more convenient, faster, simpler, more efficient, and highly practical.

[0040] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0041] Reference Figures 1-4 An unattended submersible pump automatic drainage device includes a water tank 1 for receiving and storing water discharged from the fully mechanized mining face, a submersible pump 2 installed in the water tank 1 and draining water outward, a water level stop sensor 3 installed inside the water tank 1, a water level start sensor 4 installed inside the water tank 1 and located above the water level stop sensor 3, a control box 5 installed on the top of the water tank 1, and a power supply box 6.

[0042] The power supply box 6 supplies power to the electrical components inside the automatic drainage device.

[0043] Control box 5 is connected to water level stop sensor 3 and water level start sensor 4 via wire 51, and controls the start and stop of submersible pump 2 based on the received information.

[0044] A water inlet pipe 11 for injecting water into the water tank 1 is horizontally welded to the side end. The height of the water inlet pipe 11 is higher than that of the water level start sensor 4. A drain pipe 21 connected to the outside of the water tank 1 is fixed to the top of the submersible pump 2 by bolts.

[0045] When the automatic drainage device is used, the water discharged from the longwall mining face will directly enter the water storage tank 1 along the inlet pipe 11. When the water level reaches the height of the water level activation sensor 4, the water level activation sensor 4 transmits a signal to the control box 5 through the wire 51. The control box 5 controls the submersible pump 2 to work, thereby pumping out the water and discharging it along the drain pipe 21. As the water is gradually discharged, the water level in the water storage tank 1 reaches the height of the water level stop sensor 3. At this time, the water level stop sensor 3 transmits a signal to the control box 5 through the wire 51. The control box 5 controls the submersible pump 2 to stop working.

[0046] Two through holes 12 are opened at intervals on the top of the water tank 1. A regulating pipe 13 is vertically slidably inserted into the through holes 12. The middle part of the regulating pipe 13 is hollow. The water level stop sensor 3 and the water level start sensor 4 are fixed to the lower end of the regulating pipe 13 by bolts. A limiting piece 131 is integrally provided on the top of the regulating pipe 13, which abuts against the opening of the through hole 12. The wire 51 connected to the control box 5 extends into the water tank 1 along the inside of the regulating pipe 13 and is connected to the water level stop sensor 3 and the water level start sensor 4.

[0047] The regulating pipe 13 is restricted by the top limiting plate 131 and cannot be fully inserted into the water tank 1. The wire 51 extending from the control box 5 is directly connected to the water level stop sensor 3 and the water level start sensor 4 along the inside of the regulating pipe 13. On the one hand, the wire 51 can be protected to reduce water vapor intrusion. On the other hand, the water level stop sensor 3 and the water level start sensor 4 can be pulled out of the water tank 1 by vertically moving the regulating pipe 13 upward, so as to carry out maintenance and replacement, which is more convenient.

[0048] A positioning clamp 14 for positioning and adjusting the pipe 13 is provided on one side of the through hole 12 at the top of the water storage tank 1. The positioning clamp 14 includes two clamping plates 141 that are coaxially rotatably connected by a rotating shaft. The middle of the two clamping plates 141 forms a clamping groove 142 for clamping the adjusting pipe 13. The ends of the two clamping plates 141 away from their own rotating shaft are fixedly connected by bolts. The two clamping plates 141 rotate to clamp the adjusting pipe 13 in the clamping groove 142 and are then fixed by bolts, so that the adjusting pipe 13 can be vertically moved to any height and then fixed by the positioning clamp 14, thereby realizing the adjustment of the water level of the submersible pump 2 for starting and stopping.

[0049] Inside the water storage tank 1, below the outlet of the water inlet pipe 11, there is a cinder filter basket 7. The cinder filter basket 7 has filter holes 71 evenly arranged on it. The cinder filter basket 7 receives the water flow discharged from the water inlet pipe 11 and filters the cinder.

[0050] The cinder filter basket 7 is located below the outlet of the water inlet pipe 11. Water flows in along the water inlet pipe 11 and is sprayed directly into the cinder filter basket 7. Cinders and other impurities will be filtered out and left behind. Staff only need to clean the cinder filter basket 7 periodically.

[0051] An operation window 15 is provided on the top of the water tank 1 above the water inlet pipe 11. A translation cylinder 18 is horizontally fixed to both sides of the operation window 15 on the top of the water tank 1 by bolts. The piston rod end of the translation cylinder 18 is vertically fixed to a vertical sliding rail 17 that extends into the water tank 1 along the operation window 15 by bolts. A T-shaped groove is vertically provided on the side end of the vertical sliding rail 17. A T-shaped slider is slidably inserted into the T-shaped groove. A lifting platform 16 is welded to the T-shaped slider. A wire rope winder 181 is horizontally fixed to the top of the vertical sliding rail 17 by bolts. The wire rope wound on the wire rope winder 181 extends downward and is fixed to the lifting platform 16, thereby driving the lifting platform 16 to move stably vertically through the wire rope winder 181.

[0052] Two cinder filter baskets 7 are provided and fixed to the upper end of the lifting platform 16. Two sets of translation cylinders 18 drive the vertical sliding rail 17 to move horizontally to replace the cinder filter basket 7 located below the outlet of the water inlet pipe 11. This allows the two cinder filter baskets 7 to move alternately to the lower side of the outlet of the water inlet pipe 11 for filtration. When cleaning the cinder in one cinder filter basket 7, it can be ensured that one cinder filter basket 7 is still in the working position.

[0053] The lifting platform 16 includes a vertical plate 161 that slides vertically against the inner wall of the water storage tank 1 and a horizontal plate 162 that is horizontally welded to the top of the vertical plate 161. The slag filter basket 7 is rotatably connected to the junction of the vertical plate 161 and the horizontal plate 162 via a rotating shaft. The slag filter basket 7 performs filtration when it is horizontally against the upper surface of the horizontal plate 162. When the slag filter basket 7 rotates 180 degrees and against one end of the vertical plate 161, it pours out the slag.

[0054] When filtration is in progress, the cinder filter basket 7 is in contact with the inner wall of the water tank 1 and the horizontal plate 162, making it more secure and stable. When it is time to clean the cinder, the entire lifting platform 16 is moved up to detach from the water tank 1. At this time, the cinder filter basket 7 can be rotated 180 degrees so that it is in contact with one end face of the vertical plate 161, and the cinder can be poured directly.

[0055] The side wall of the cinder filter basket 7 away from the water inlet pipe 11 bends upward and extends towards the side closer to the water inlet pipe 11. This forms an upward and inward semi-enclosed state, which reduces water splashing when water is sprayed from the outlet of the water inlet pipe 11, and also prevents the cinder from being impacted and detached from the cinder filter basket 7.

[0056] Multiple downward-extending steel wires 19 are bolted to the inner top wall of the water storage tank 1. The submersible pump 2 is bolted to the lower end of the multiple hanging steel wires 19. The submersible pump 2 is directly suspended from the lower end of the multiple hanging steel wires 19, which ensures the normal operation of the submersible pump 2 while reducing the impact of its vibration on the outside and itself.

[0057] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] In this invention, 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An unattended submersible pump automatic drain device, characterized by: It includes a water storage tank (1) for receiving and storing water discharged from the fully mechanized mining face, a submersible pump (2) installed in the water storage tank (1) and discharging water outward, a water level stop sensor (3) installed inside the water storage tank (1), a water level start sensor (4) installed inside the water storage tank (1) and located above the water level stop sensor (3), and a control box (5) installed on the top of the water storage tank (1). The control box (5) is connected to the water level stop sensor (3) and the water level start sensor (4) respectively via wires (51), and controls the start and stop of the submersible pump (2) according to the received information. The water tank (1) is provided with an inlet pipe (11) for injecting water into the tank. The height of the inlet pipe (11) is higher than that of the water level start sensor (4). The top of the submersible pump (2) is provided with a drain pipe (21) that connects to the outside of the water tank (1).

2. The unattended submersible pump automatic drainage device as described in claim 1, characterized in that: The top of the water tank (1) has two through holes (12) spaced apart. A regulating pipe (13) is vertically slidably inserted into the through holes (12) of the water tank (1). The water level stop sensor (3) and the water level start sensor (4) are fixed to the lower end of the regulating pipe (13). A limiting piece (131) is provided at the top of the regulating pipe (13) and abuts against the opening of the through hole (12). The wire (51) connected to the control box (5) extends into the water tank (1) along the inside of the regulating pipe (13) and connects to the water level stop sensor (3) and the water level start sensor (4).

3. The unattended submersible pump automatic drainage device as described in claim 2, characterized in that: The top of the water storage tank (1) is provided with a positioning clamp (14) for positioning the regulating pipe (13) on one side of the through hole (12). The positioning clamp (14) includes two clamping pieces (141) that are rotatably connected on the same axis. The middle part of the two clamping pieces (141) forms a clamping groove (142) for clamping the regulating pipe (13). The ends of the two clamping pieces (141) away from their own rotation axis are fixedly connected by bolts.

4. The unattended submersible pump automatic drainage device as described in claim 1, characterized in that: Inside the water storage tank (1), a cinder filter basket (7) is provided below the outlet of the water inlet pipe (11). The cinder filter basket (7) has filter holes (71) evenly arranged on it. The cinder filter basket (7) receives the water flow discharged from the water inlet pipe (11) and filters the cinder.

5. The unattended submersible pump automatic drainage device as described in claim 4, characterized in that: An operation window (15) is provided on the top of the water storage tank (1) above the water inlet pipe (11). A lifting platform (16) is vertically slidably provided on the water storage tank (1) at the operation window (15). The coal slag filter basket (7) is fixed on the upper end of the lifting platform (16).

6. The unattended submersible pump automatic drainage device as described in claim 5, characterized in that: The water storage tank (1) is vertically equipped with a vertical sliding rail (17) at the operation window (15). The lifting platform (16) is vertically slidably connected to the vertical sliding rail (17) and its side end is close to the inner wall of the water storage tank (1). The top of the vertical sliding rail (17) is equipped with a wire rope rewinder (181) that drives the lifting platform (16) to move vertically. The slag filter basket (7) is rotatably connected to the upper end of the lifting platform (16). The rotating shaft of the slag filter basket (7) is located on the side of the lifting platform (16) close to the inner wall of the water storage tank (1).

7. The unattended submersible pump automatic drainage device as described in claim 6, characterized in that: The vertical sliding rails (17) are provided in two sets and are spaced apart. The top of the water tank (1) is provided with a translation cylinder (18) on the side of the two sets of vertical sliding rails (17) that are far apart from each other. The two sets of translation cylinders (18) drive the vertical sliding rails (17) to move horizontally to replace the slag filter basket (7) located below the outlet of the water inlet pipe (11).

8. The unattended submersible pump automatic drainage device as described in claim 5, characterized in that: The cinder filter basket (7) bends upward on the side wall away from the water inlet pipe (11) and extends towards the side closer to the water inlet pipe (11).

9. The unattended submersible pump automatic drainage device as described in claim 5, characterized in that: The lifting platform (16) includes a vertical plate (161) that slides vertically against the inner wall of the water storage tank (1) and a horizontal plate (162) that is horizontally connected to the top of the vertical plate (161). The slag filter basket (7) is rotatably connected to the junction of the vertical plate (161) and the horizontal plate (162). The slag filter basket (7) performs filtration when it is horizontally against the upper surface of the horizontal plate (162). The slag filter basket (7) is tilted when it rotates 180 degrees and against one end of the vertical plate (161).

10. The unattended submersible pump automatic drainage device as described in claim 1, characterized in that: The water storage tank (1) has multiple hanging steel wires (19) extending downward from the inner top wall, and the submersible pump (2) is fixed to the lower end of the multiple hanging steel wires (19).

Images