Automatic start-stop submersible sewage pump

Abstract

The utility model relates to a kind of automatic start-stop sewage submersible pump of drainage equipment technical field, comprising: buoyancy tank, it is fixedly installed on the inner wall of pit, the bottom of buoyancy tank is equipped with water inlet hole, slidingly connected with buoyancy block in buoyancy tank, the edge of buoyancy block lower surface is fixedly connected with scraper, and the end of scraper away from buoyancy block is contacted with the inner wall of buoyancy tank;Water pump, it is installed in pit, and the water outlet of water pump is communicated with water guide pipe, and the water outlet end of water guide pipe extends to drainpipe;Control mechanism, it includes controller and two liquid level sensors, two liquid level sensors are electrically connected with controller, two liquid level sensors are respectively arranged in the upper portion and lower portion of the inner wall of buoyancy tank, and the detection surface of liquid level sensor and the inner wall of buoyancy tank are on the same vertical plane;The water pump is electrically connected with controller. The present scheme is used to solve the problem that the current automatic drainage device may cause the failure of drainage system due to the solidification of slurry in accumulated water.

Description

Technical Field

[0001] This utility model relates to the field of drainage equipment technology, specifically to an automatic start-stop submersible sewage pump. Background Technology

[0002] The integrated circulating water pit is primarily used to collect rainwater seepage from walls and other accumulated water from the integrated circulating water system. Working in conjunction with a submersible sewage pump, it maintains the sewage level in the well between 0.2 and 0.8 meters. However, during periods of severe rainwater seepage, the pit accumulates water rapidly, requiring manual pumping every half hour. Failure to do so, or forgetting to pump, could lead to overflowing of the pit, flooding the pump room, damaging equipment, and disrupting production. Therefore, to avoid forgetting to pump water, an automatic drainage device for a pit is disclosed in patent announcement number 201220505430.5. This device includes a water pump located on the ground next to the pit, with an inlet pipe and an outlet pipe connected to the pump. The inlet pipe is inserted into the pit. The device also includes a controller, a fixed frame, a guide cylinder, a guide, and a float box located within the guide. The fixed frame and guide cylinder are both fixed to the ground next to the pit. The fixed frame is equipped with a first limit switch and a second limit switch. The guide is connected to the inner wall of the pit, and its inner cavity communicates with the pit. A vertical rod inserted into the guide cylinder is connected to the float box. A horizontal rod is connected to the upper end of the vertical rod, positioned between the first and second limit switches. The controller is connected to the fixed frame, and the water pump, the first limit switch, and the second limit switch are all electrically connected to the controller. The advantage of this invention is that it achieves automated pumping control, reduces labor costs, and minimizes losses caused by human negligence. However, when this method is applied to a comprehensive circulating water pit, because the water contains mud and sand, the mud and sand will adhere to the inner wall of the guide during the water level drop. When the mud and sand solidify on the guide, they will hinder the up and down movement of the float box, which will cause the water level to rise. The float box will be unable to move up normally to touch the limit switch, affecting the automatic start of the water pump and causing the automatic drainage system to malfunction. Utility Model Content

[0003] The present invention aims to provide an automatic start-stop submersible sewage pump to solve the problem that current automatic drainage devices may malfunction due to the solidification of mud in the accumulated water.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: an automatic start-stop submersible sewage pump, comprising: A buoyancy box is fixedly installed on the inner wall of the pit. The bottom of the buoyancy box is provided with a water inlet. A buoyancy block is slidably connected in the buoyancy box. A scraper is fixedly connected to the edge of the lower surface of the buoyancy block. The end of the scraper away from the buoyancy block contacts the inner wall of the buoyancy box. A water pump is installed in a pit, and the outlet of the water pump is connected to a water guide pipe, the outlet of which extends into a drainage channel. The control mechanism includes a controller and two liquid level sensors. The two liquid level sensors are electrically connected to the controller. The two liquid level sensors are respectively installed on the upper and lower parts of the inner wall of the buoyancy tank, and the detection surface of the liquid level sensors is on the same vertical plane as the inner wall of the buoyancy tank. The water pump is electrically connected to the controller.

[0005] Preferably, as an improvement, it also includes a pushing mechanism, which includes a telescopic rod, a magnetic block and an electromagnet. The telescopic rod is vertically fixed to the pit, and the electromagnet is fixedly installed at the bottom end of the telescopic rod and above the buoyancy block. The magnetic block is used in conjunction with the electromagnet and is fixedly installed on the upper surface of the buoyancy block.

[0006] Preferably, as an improvement, the bottom of the buoyancy box has two elongated water inlets, which are adjacent to the bottom of the box walls on opposite sides of the buoyancy box and their length is the same as the width of the buoyancy box.

[0007] Preferably, as an improvement, the electromagnet is electrically connected to the controller, and the telescopic rod is an electronic telescopic rod, which is also electrically connected to the controller.

[0008] Preferably, as an improvement, the bottom of the buoyancy box is provided with a nozzle, and the nozzle is provided with multiple nozzles arranged in a ring array. When in use, the nozzles spray water outward and upward at an angle. A branch pipe is connected to the water guide pipe, and the water outlet of the branch pipe is connected to the nozzle. A solenoid valve is installed in the branch pipe, and the solenoid valve is electrically connected to the controller.

[0009] The principle and advantages of this solution are as follows: In practical applications, when water accumulates in the pit, such as during the rainy season when walls leak or when the circulating water system accumulates water, the water level in the pit gradually rises. The water flows into the buoyancy box through the inlet, and the buoyancy block rises in the buoyancy box due to the buoyancy of the water. When the rising water level moves the buoyancy block to the level sensor at the top of the buoyancy box, the level sensor transmits a monitoring signal to the controller. The controller then starts the water pump, which pumps out the water from the pit. As the water level decreases, the buoyancy block moves downwards with the drop in water level. During this downward movement, the scraper fixed to the lower surface of the buoyancy block contacts the inner wall of the buoyancy box, thus moving the scraper downwards to scrape off the mud adhering to the inner wall of the buoyancy box. The water inlet is elongated and located close to the wall of the buoyancy tank. Therefore, the scraped-off mud falls out of the buoyancy tank through the water inlet under gravity. When the buoyancy block moves to the level sensor at the bottom of the buoyancy tank, the sensor transmits a monitoring signal to the controller, which then opens the solenoid valve. The water pump then pumps water through a branch pipe into the nozzle, which sprays water directly onto the scraper to wash away the mud and keep the scraper clean. After cleaning is complete, the controller shuts off the water pump.

[0010] When excessive mud adheres to the inner wall of the buoyancy tank, preventing the buoyancy block from effectively moving the scraper downwards under its own weight, the controller extends the telescopic rod and activates the electromagnet. The extended rod, through the electromagnet, attracts the magnetic block on the upper surface of the buoyancy block, securing it in place. As the telescopic rod continues to extend, it pushes the buoyancy block downwards, ensuring that even with excessive mud adhering to the inner wall of the buoyancy tank, the scraper can still effectively remove it. After cleaning, the controller deactivates the electromagnet and retracts the telescopic rod.

[0011] 1. Compared with existing automatic drainage devices, which rely solely on the natural movement of the float, the float is prone to jamming after the mud solidifies. In contrast, the scraper in this solution is fixed to the lower surface of the buoyancy block and in close contact with the inner wall of the buoyancy box. As the buoyancy block descends with the liquid level, the scraper can move down along the entire inner wall to scrape off the adhering mud in real time. This avoids the long-term retention of mud in the liquid level fluctuation range, reduces the risk of solidification from the source, and prevents the automatic drainage system from malfunctioning due to the float being jammed by the solidified mud.

[0012] 2. The nozzle is connected to the water pump through a branch pipe, and the nozzle sprays water outward and upward at an angle. This not only directly washes away the mud residue on the scraper surface, but also uses the impact force of the water flow to perform secondary cleaning on the tiny residues scraped off the inner wall of the buoyancy box.

[0013] 3. When the buoyancy block cannot move down due to excessive mud on the inner wall and its own weight, the controller can activate the electromagnet to attract the magnetic block, and then force the buoyancy block to move down through the telescopic rod. Even in extreme working conditions where the mud solidifies and the resistance increases sharply, the scraper cleaning can still be completed through mechanical forced drive to avoid system failure due to jamming. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an automatic start-stop submersible sewage pump according to the present invention.

[0015] Figure 2 This is a structural diagram of an automatic start-stop submersible sewage pump of this utility model installed in a pit.

[0016] Figure 3 This is a schematic diagram of the circuit connection of the controller in an embodiment of this utility model.

[0017] The reference numerals in the accompanying drawings include: fixed rod 1, telescopic rod 2, electromagnet 3, liquid level sensor 4, scraper 5, water inlet 6, buoyancy box 7, water pump 8, water guide pipe 9, buoyancy block 10, magnetic block 11, pit 12, nozzle 13, solenoid valve 14, branch pipe 15. Detailed Implementation

[0018] The following detailed description illustrates the specific implementation method: The basic implementation examples are as follows: Figure 1 Appendix Figure 2 and attached Figure 3 As shown: An automatic start-stop submersible sewage pump includes: A buoyancy box 7 is fixedly installed on the inner wall of the pit 12. The bottom of the buoyancy box 7 has two elongated water inlet holes 6, which are adjacent to the bottom of opposite sides of the box wall and have the same length as the width of the buoyancy box 7. A buoyancy block 10 is slidably connected inside the buoyancy box 7. A scraper 5 is fixedly connected to the edge of the lower surface of the buoyancy block 10, with the end of the scraper 5 away from the buoyancy block 10 contacting the inner wall of the buoyancy box 7. A nozzle 13 is located at the bottom of the buoyancy box 7, with multiple nozzles arranged in a circular array. When in use, the nozzles spray water outwards and upwards at an angle. A branch pipe 15 is connected to the water guide pipe 9, and the outlet of the branch pipe 15 is connected to the nozzle 13. A solenoid valve 14 is installed in the branch pipe 15 and is electrically connected to the controller.

[0019] Water pump 8 is installed in pit 12. The outlet of water pump 8 is connected to water guide pipe 9, and the outlet end of water guide pipe 9 extends into the drainage channel. The control mechanism includes a controller and two liquid level sensors 4. The two liquid level sensors 4 are electrically connected to the controller. The two liquid level sensors 4 are respectively installed on the upper and lower parts of the inner wall of the buoyancy tank 7, and the detection surface of the liquid level sensors 4 is on the same vertical plane as the inner wall of the buoyancy tank 7. The water pump 8 is electrically connected to the controller.

[0020] The pushing mechanism includes an electronically controlled telescopic rod 2, a magnetic block 11, and an electromagnet 3. The telescopic rod 2 is vertically fixed in the pit 12 by a horizontally arranged fixing rod 1 fixed to the top of the pit wall. The electromagnet 3 is fixedly installed at the bottom of the telescopic rod 2 and located above the buoyancy block 10. The magnetic block 11 works in conjunction with the electromagnet 3 and is fixedly installed on the upper surface of the buoyancy block 10. The electromagnet 3 is electrically connected to the controller, and the telescopic rod 2 is also electrically connected to the controller.

[0021] The specific implementation process is as follows: In practical applications, when water accumulates in the pit 12, such as during the rainy season when walls leak or when the circulating water system accumulates water, the water level in the pit 12 gradually rises. The water flows into the buoyancy box 7 through the inlet 6, and the buoyancy block 10 rises in the buoyancy box 7 under the buoyancy of the water. When the rising water level moves the buoyancy block 10 to the level sensor 4 at the top of the buoyancy box 7, the level sensor 4 transmits a monitoring signal to the controller, which then starts the water pump 8. The water pump 8 pumps out the water from the pit 12. As the water level in the pit 12 decreases, the buoyancy block 10 moves downwards with the decrease in water level. During this downward movement, the scraper 5 fixed to the lower surface of the buoyancy block 10 contacts the inner wall of the buoyancy box 7. Therefore, as the buoyancy block 10 moves downwards, the scraper 5 moves downwards, scraping off the mud adhering to the inner wall of the buoyancy box 7. The water inlet 6 is elongated and located close to the wall of the buoyancy tank 7. Therefore, the scraped mud falls out of the buoyancy tank 7 through the water inlet 6 under the influence of gravity. When the buoyancy block 10 moves to the level sensor 4 at the bottom of the buoyancy tank 7, the level sensor 4 transmits a monitoring signal to the controller, which controls the opening of the solenoid valve 14. The water pump 8 pumps water through the branch pipe 15 into the nozzle 13, and then the nozzle 13 sprays water directly to wash the scraper 5, removing the mud from the scraper 5 and keeping it clean. After cleaning is completed, the controller shuts off the water pump 8.

[0022] When excessive mud adheres to the inner wall of the buoyancy box 7, preventing the buoyancy block 10 from effectively moving the scraper 5 downwards under its own weight, the controller extends the telescopic rod 2 and activates the electromagnet 3. The extended telescopic rod 2, through the electromagnet 3, attracts the magnetic block 11 on the upper surface of the buoyancy block 10, thus fixing it in place. As the telescopic rod 2 continues to extend, it pushes the buoyancy block 10 downwards, ensuring that even with excessive mud adhering to the inner wall of the buoyancy box 7, the scraper 5 can still effectively remove the mud. After cleaning, the controller deactivates the electromagnet 3 and retracts the telescopic rod 2.

[0023] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An automatic start-stop submersible sewage pump, characterized in that, include: A buoyancy box is fixedly installed on the inner wall of the pit. The bottom of the buoyancy box is provided with a water inlet. A buoyancy block is slidably connected in the buoyancy box. A scraper is fixedly connected to the edge of the lower surface of the buoyancy block. The end of the scraper away from the buoyancy block contacts the inner wall of the buoyancy box. A water pump is installed in a pit, and the outlet of the water pump is connected to a water guide pipe, the outlet of which extends into a drainage channel. The control mechanism includes a controller and two liquid level sensors. The two liquid level sensors are electrically connected to the controller. The two liquid level sensors are respectively installed on the upper and lower parts of the inner wall of the buoyancy tank, and the detection surface of the liquid level sensors is on the same vertical plane as the inner wall of the buoyancy tank. The water pump is electrically connected to the controller.

2. The automatic start-stop submersible sewage pump according to claim 1, characterized in that: It also includes a pushing mechanism, which comprises a telescopic rod, a magnetic block, and an electromagnet. The telescopic rod is vertically fixed to the pit, and the electromagnet is fixedly installed at the bottom end of the telescopic rod and above the buoyancy block. The magnetic block works in conjunction with the electromagnet and is fixedly installed on the upper surface of the buoyancy block.

3. The automatic start-stop submersible sewage pump according to claim 2, characterized in that: The bottom of the buoyancy box has two elongated water inlets, which are located close to the bottom of the opposite sides of the box wall and have the same length as the width of the buoyancy box.

4. The automatic start-stop submersible sewage pump according to claim 3, characterized in that: The electromagnet is electrically connected to the controller, and the telescopic rod is an electronic telescopic rod, which is also electrically connected to the controller.

5. The automatic start-stop submersible sewage pump according to claim 4, characterized in that: The bottom of the buoyancy box is equipped with a nozzle, which has multiple nozzles arranged in a ring array. When in use, the nozzles spray water outwards and upwards at an angle. A branch pipe is connected to the water guide pipe, and the water outlet of the branch pipe is connected to the nozzle. A solenoid valve is installed in the branch pipe, and the solenoid valve is electrically connected to the controller.

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