Water level controller of water pump

By designing an adjustable hollow upper and lower floating layer structure, combined with an automatic control system of magnetic ring and metal sheet, the problem of impurities and sediment suction in the prior art is solved, and the clean operation of the water pump and automated water level control are realized.

CN119467299AInactive Publication Date: 2025-02-18ZHEJIANG MONRO MACHINERY & ELECTRONICS
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Patent Information

Application Number
CN202510027205.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-08
Publication Date
2025-02-18
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In liquids with complex environments, existing float magnetic switch level controllers are prone to suck impurities into the water pump, affecting the operation of the water pump, and it is difficult to avoid adsorption of sediments, resulting in clogging of the water pump pipeline.

Method used

A water level controller for a water pump is designed, adopting an upper and lower floating layer structure, with an internal hollow and adjustable interior, adjusting the hollowness degree through the control port to avoid impurities inhalation and adsorption of sediments. At the same time, the switch control unit and the water inlet control unit automatically control the switch of the water pump through the cooperation of the magnetic ring and the metal plate to achieve accurate control of the water level.

Benefits of technology

It effectively avoids impurities and sediments entering the water pump, keeps the water pump pipeline clean, ensures the normal operation of the water pump, and realizes automatic water level control, which is suitable for harsh liquid environments.

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Abstract

The invention relates to the technical field of water pump parts, and discloses a water level controller of a water pump, the water level controller comprises an upper floating layer and a lower floating layer, the upper floating layer and the lower floating layer are hollow, and the outer side of the upper floating layer and the outer side of the lower floating layer are respectively provided with a control port used for controlling the hollow degree of the upper floating layer and the lower floating layer; a switch control part penetrates through the upper floating layer and the lower floating layer from top to bottom, and the upper end and the lower end of the switch control part are used for making contact with the upper face and the lower face of a liquid container. The space inside the upper floating layer and the lower floating layer can be adjusted through the control port, sediment adsorption is avoided, a water pipe of the water pump is kept close to water on the liquid level all the time, floating objects are prevented from being sucked into the water pipe, and the device is suitable for the environment with severe liquid; the water pump can be automatically stopped in the water drainage and storage processes, water level control is achieved, water can be automatically drained when a water body exists in a drainage system, and water can be automatically fed when the water level in a water feeding system is lowered.
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Description

Technical Field

[0001] The invention relates to the technical field of water pump components, in particular to a water level controller of a water pump. Background Art

[0002] The water level controller can automatically open or close water pumps, solenoid valves and other equipment according to the preset upper and lower limits of the water level, thereby achieving precise control of the water level. When the water level rises to the set upper limit, the controller will automatically start the water pump to drain; when the water level drops to the set lower limit, the controller will stop the operation of the water pump. This automatic control function greatly simplifies manual operation and improves work efficiency. Water level controllers can generally be divided into reed switch water level controllers, float magnetic switch liquid level controllers, electrode type water level controllers and pressure type water level controllers. Among them, the float magnetic switch liquid level controller controls the water level by the rise and fall of the float switch. It has a simple structure, a wide range of applications, and a large number of uses.

[0003] The above-mentioned float magnetic switch liquid level controller is generally used in liquids containing solid and semi-solid floating matter, such as domestic sewage, factory wastewater and other liquids. The water inlet and outlet of the water pump it controls generally use the same pipe, which can both take in water and drain water. However, when in a liquid with a complex environment, impurities will be sucked into the water pump, and impurities deposited to the bottom of the water will be adsorbed into the pipe, affecting the operation of the water pump. The float-type liquid level controller floats to the liquid surface and can change with the height of the liquid level. The position of the pipe can be controlled by the float-type liquid level controller, and improvements are proposed based on this. Summary of the invention

[0004] The object of the present invention is to provide a water level controller for a water pump to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a water level controller for a water pump, comprising an upper floating layer and a lower floating layer, wherein the upper floating layer and the lower floating layer are both hollow inside, and the outer sides of the upper floating layer and the lower floating layer are both provided with a control port for controlling the hollowness of the upper floating layer and the lower floating layer;

[0006] The upper floating layer and the lower floating layer are penetrated from top to bottom by a switch control part, and the upper and lower ends of the switch control part are used to contact the upper and lower surfaces of the liquid container. When the switch control part moves along the upper floating layer and the lower floating layer in the up-and-down direction, it controls the switch of the water pump;

[0007] A water inlet control unit is also installed between the upper floating layer and the lower floating layer. The outer side of the water inlet control unit is connected to a water pump water pipe for controlling the position of water inlet or water outlet to be flush with the water inlet control unit.

[0008] Furthermore, the upper floating layer and the lower floating layer are arranged one above the other, the upper floating layer and the lower floating layer are symmetrical, the upper floating layer and the lower floating layer are penetrated by mounting holes, and a limiting ring 1 is fixed on one side of the upper floating layer and the lower floating layer facing outward;

[0009] The switch control part includes two groups of fixed layers, hollow tube layer one and hollow tube layer two. The two groups of fixed layers are respectively fixed in two circles of limit ring one. The hollow tube layer two is fixedly sleeved inside the hollow tube layer one. The hollow tube layer one and the hollow tube layer two pass through two mounting holes. When the hollow tube layer one and the hollow tube layer two have obstructions at the upper and lower ends respectively, the fixed layer can slide along the outer wall of the hollow tube layer one to control the water pump switch.

[0010] Furthermore, a magnetic ring is fixed on the inner side of the fixed layer;

[0011] A circle of metal sheet 1 is fixed on the inner wall of the first hollow tube layer near both ends, and a metal sheet 2 corresponding to the first metal sheet is fixed on the outer wall of the second hollow tube layer. The second metal sheet is in the shape of a thin sheet, and one end thereof extends outward in a petal shape. When the magnetic ring is located on the outer side of the second metal sheet, the second metal sheet is in contact with the first metal sheet;

[0012] The first metal sheet and the second metal sheet are electrically connected to the water pump, and the two are connected to control the water pump to stop working.

[0013] Furthermore, both upper and lower ends of the hollow tube layer 1 have baffle layers, and the baffle layers are used to abut against the fixed layer.

[0014] Furthermore, a second limiting ring and a third limiting ring are respectively fixed on opposite surfaces of the upper floating layer and the lower floating layer;

[0015] The water inlet control unit includes a fixed circular layer, a moving circular layer and an impeller;

[0016] The fixed circular layer is rotatably connected with the movable circular layer, the fixed circular layer is fixed in the second limiting ring, the movable circular layer is rotatably installed in the third limiting ring, the impeller is fixed in the movable circular layer, the interiors of the fixed circular layer and the movable circular layer are both hollow, the interior of the fixed circular layer is connected with the interior of the movable circular layer, a liquid outlet is provided on the outer side of the movable circular layer near the lower end, and the outer side of the fixed circular layer is connected to the water pump pipeline.

[0017] Furthermore, the water inlet control unit also includes a bearing 1 and a bearing 2, the fixed circular layer and the movable circular layer are connected via the bearing 1, and the movable circular layer and the limit ring 3 are connected via the bearing 2.

[0018] Furthermore, a connecting shaft is fixed between the upper floating layer and the lower floating layer, a circle of limit frames are fixed on the opposite surfaces of the upper floating layer and the lower floating layer, and grids are fixed on four directions outside the two groups of limit frames.

[0019] Furthermore, the four grids are all elastic and cover the water inlet control part.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] 1. The space inside the upper and lower floating layers can be adjusted through the control port to avoid the adsorption of sediments, keep the water pipe of the water pump close to the liquid surface, and avoid sucking floating objects into the water pipe. It is suitable for harsh liquid environments.

[0022] 2. The water pump can automatically stop during drainage and water storage to achieve water level control. It can automatically drain water when there is water in the drainage system and automatically fill water in the water inlet system when the water level drops.

[0023] 3. During the drainage or water intake process, water pipes are required. The water pipes are connected to the fixed circular layer. Water inlet or outlet of the water pipes can pass through the impeller to make the impeller rotate, generate a dynamic effect, and achieve dynamic balance. The upper floating layer and the lower floating layer can maintain relative balance under the condition of certain external force. When the impeller is stuck, the moving circular layer will rotate, and dynamic balance can still be achieved. The liquid moves out from the outlet horizontally in a circle, which can maintain dynamic balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the grid separation structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the partial cross-sectional structure of the upper floating layer and the lower floating layer of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the switch control unit of the present invention;

[0029] Figure 5 It is a schematic diagram of the partial structure of the switch control unit of the present invention;

[0030] Figure 6 The present invention Figure 5 A is a schematic diagram of the partially enlarged structure of the middle part;

[0031] Figure 7 It is a schematic diagram of the structure of the water inlet control unit of the present invention;

[0032] Figure 8It is a schematic diagram of the exploded structure of the water inlet control part of the present invention.

[0033] In the figure: 1. upper floating layer; 2. lower floating layer; 21. control port; 22. mounting hole; 23. limit ring 1; 24. limit ring 2; 25. limit ring 3; 3. switch control unit; 31. fixed layer; 32. hollow tube layer 1; 33. hollow tube layer 2; 34. baffle layer; 35. metal sheet 1; 36. metal sheet 2; 37. magnetic ring; 4. water inlet control unit; 41. fixed circular layer; 42. moving circular layer; 43. bearing 1; 44. bearing 2; 45. liquid outlet; 46. impeller; 5. grid; 51. limit frame; 52. connecting shaft. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-Figure 8 The present invention provides a technical solution: since the water pump needs to work in different liquids, the water pipe of the water pump needs to contact with different liquids. When in a complex liquid environment, impurities will be sucked into the water pump, and impurities deposited on the bottom of the water will be adsorbed into the pipeline, affecting the operation of the water pump. The float type liquid level controller floats to the liquid surface and can change with the height of the liquid level. The position of the pipeline can be controlled by the float type liquid level controller. Based on this, a water level controller for a water pump is proposed, such as Figure 1 and Figure 2 As shown, it includes an upper floating layer 1 and a lower floating layer 2, the upper floating layer 1 and the lower floating layer 2 are hollow inside, and the outer sides of the upper floating layer 1 and the lower floating layer 2 are provided with a control port 21, which is used to control the hollowness of the upper floating layer 1 and the lower floating layer 2, so as to realize working in liquids of different densities, and always keep the upper floating layer 1 and the lower floating layer 2 floating, and in the floating state, the upper floating layer 1 is located at the upper end, and the lower floating layer 2 is located at the lower end;

[0036] The upper floating layer 1 and the lower floating layer 2 are penetrated from top to bottom by a switch control part 3, and the upper and lower ends of the switch control part 3 are used to contact the upper and lower surfaces of the liquid container. When the switch control part 3 moves in the upper and lower directions along the upper and lower floating layers 1 and 2, the switch control part 3 controls the switch of the water pump. The switch control part 3 can float and is limited by the upper and lower floating layers 1 and 2 to keep it in a vertical state. The upper and lower ends can respectively contact the upper and lower sides of the water storage container to realize the switch of the water pump;

[0037] A water inlet control unit 4 is also installed between the upper floating layer 1 and the lower floating layer 2. The outer side of the water inlet control unit 4 is connected to the water pipe of the water pump, and is used to control the position of water inlet or water outlet to be flush with the water inlet control unit 4. The main function of the water inlet control unit 4 is to cooperate with the upper floating layer 1 and the lower floating layer 2, and avoid directly floating or sinking as the upper floating layer 1 and the lower floating layer 2 move, so that it can avoid contact with the uppermost and lowermost layers of liquid, avoid adsorbing floating objects and sediments, and avoid affecting the operation of the water pump.

[0038] like Figure 3 As shown, it is necessary to keep the upper floating layer 1 and the lower floating layer 2 one above the other, and it is also necessary to connect the switch control unit 3 to the upper floating layer 1 and the lower floating layer 2. The upper floating layer 1 and the lower floating layer 2 are arranged one above the other, and the upper floating layer 1 and the lower floating layer 2 are symmetrical. The upper floating layer 1 and the lower floating layer 2 are penetrated with mounting holes 22, and a limit ring 23 is fixed on one side of the upper floating layer 1 and the lower floating layer 2 facing outward;

[0039] like Figure 4 As shown, the switch control part 3 is installed. The switch control part 3 includes two groups of fixed layers 31, a hollow tube layer 1 32 and a hollow tube layer 2 33. The two groups of fixed layers 31 are respectively fixed in two circles of limit rings 1 23, and the hollow tube layer 2 33 is fixedly sleeved inside the hollow tube layer 1 32. The hollow tube layer 1 32 and the hollow tube layer 2 33 pass through the two installation holes 22. When there are obstacles at the upper and lower ends of the hollow tube layer 1 32 and the hollow tube layer 2 33 respectively, the fixed layer 31 can slide along the outer wall of the hollow tube layer 1 32 to control the water pump switch, and the hollow tube layer 1 32 and the hollow tube layer 2 33 can move along the upper and lower directions of the fixed layer 31 to produce changes and movements in the water body.

[0040] like Figure 5 and Figure 6 and Figure 7 As shown, when the hollow tube layer 1 32 and the hollow tube layer 2 33 are affected by the external liquid to move up and down, that is, when the liquid is full or empty, the water pump needs to be turned off, and a circle of magnetic rings 37 is fixed on the inner side of the fixed layer 31;

[0041] A circle of metal sheet 1 35 is fixed on the inner wall of the hollow tube layer 1 32 near both ends, and a metal sheet 2 36 corresponding to the metal sheet 1 35 is fixed on the outer wall of the hollow tube layer 2 33. The metal sheet 2 36 is in the shape of a thin sheet, and one end thereof extends outward in a petal shape. When the magnetic ring 37 is located on the outer side of the metal sheet 2 36, the metal sheet 2 36 contacts the metal sheet 1 35. The metal sheet 2 36 is in the shape of a thin sheet, and one end thereof extends outward in a petal shape, which can be effectively adsorbed by the magnetic ring 37, so that it contacts the metal sheet 1 35, and the water pump is turned off.

[0042] The first metal sheet 35 and the second metal sheet 36 are electrically connected to the water pump, and the two are connected to control the water pump to stop working.

[0043] like Figure 6 As shown, both upper and lower ends of the hollow tube layer 1 32 have blocking layers 34 , and the blocking layers 34 are used to abut against the fixed layer 31 to prevent the hollow tube layer 1 32 from moving out of the fixed layer 31 .

[0044] like Figure 7 and Figure 8 As shown, in order to limit the water inlet control part 4, a second limiting ring 24 and a third limiting ring 25 are respectively fixed on the opposite surfaces of the upper floating layer 1 and the lower floating layer 2;

[0045] The water inlet control unit 4 includes a fixed circular layer 41, a moving circular layer 42 and an impeller 46;

[0046] The fixed circular layer 41 is rotatably connected to the movable circular layer 42, the fixed circular layer 41 is fixed in the limiting ring 24, the movable circular layer 42 is rotatably installed in the limiting ring 3 25, the impeller 46 is fixed in the movable circular layer 42, the interiors of the fixed circular layer 41 and the movable circular layer 42 are both hollow, the interior of the fixed circular layer 41 is connected with the interior of the movable circular layer 42, a liquid outlet 45 is opened on the outer side of the movable circular layer 42 near the lower end, and the outer side of the fixed circular layer 41 is connected to the water pump pipeline.

[0047] The water inlet control part 4 also includes a bearing 1 43 and a bearing 2 44. The fixed circular layer 41 and the movable circular layer 42 are connected by the bearing 1 43, and the movable circular layer 42 and the limit ring 3 25 are connected by the bearing 2 44, so that the impeller 46 can rotate and achieve a dynamic balance during the rotation. Even under the action of external force, a certain degree of balance can be maintained. Even if the impeller 46 is stuck, the movable circular layer 42 can rotate to maintain dynamic balance.

[0048] like Figure 2 As shown, a connecting shaft 52 is fixed between the upper floating layer 1 and the lower floating layer 2, a circle of limit frames 51 are fixed on the opposite surfaces of the upper floating layer 1 and the lower floating layer 2, and grids 5 are fixed on the four directions outside the two sets of limit frames 51.

[0049] The four grids 5 are all elastic and cover the water inlet control part 4. When the water pump and water pipe drain outward, the water body in the water storage equipment decreases, and then the water pump stops draining. After that, when the water body gradually increases, the water pump starts working again, causing the water body and the water pipe to go from drainage to stop and then to drainage. When the water body is draining, it has an squeezing effect on the grid 5, causing the grid 5 to deform, and then reset, and continuously deforming and resetting, causing the holes of the grid 5 to change to prevent the holes from being blocked, and the water inlet to the water pipe also changes in the same way.

[0050] The working principle of the present invention is as follows: through the connection between the water inlet control unit 4 and the water pipe of the water pump, the space inside the upper floating layer 1 and the lower floating layer 2 can be adjusted through the control port 21, that is, the control port 21 can infuse liquid or solid into the upper floating layer 1 and the lower floating layer 2, keep the upper floating layer 1 and the lower floating layer 2 floating on the liquid surface of different densities, and make the upper floating layer 1 and the lower floating layer 2 vertical, so that the water pipe of the water pump is located in the water close to the liquid surface. When adsorbing water, it can avoid adsorbing sediment and keep the water pipe of the water pump always in the water close to the liquid surface. In addition, it can also avoid sucking floating objects into the water pipe by blocking through the grid 5. It is suitable for harsh liquid environments.

[0051] Secondly, in the process of draining water outward, water enters the water pipe. As the water gradually decreases, the upper floating layer 1 and the lower floating layer 2 move downward, so that the lower end of the hollow tube layer 2 33 contacts the lower end of the water storage device. The upper floating layer 1 and the lower floating layer 2 continue to move downward, and the hollow tube layer 1 32 and the hollow tube layer 2 33 move upward accordingly, so that the metal sheet 2 36 at the lower end is located on the inner side of the magnetic ring 37, so that the metal sheet 2 36 expands outward under the effect of magnetism and contacts the metal sheet 1 35, and the water pump is turned off. On the contrary, when storing water, the upper end of the hollow tube layer 2 33 contacts the upper end of the water storage device, and the metal sheet 1 35 and the metal sheet 2 36 at the upper end contact, and the water pump is turned off to complete the water storage.

[0052] The water pump can automatically stop during the drainage and water storage process to achieve water level control. It can automatically drain water when there is water in the drainage system, and automatically fill water when the water level in the water inlet system drops.

[0053] In addition, during the drainage or water intake process, water pipes are required to be used, and the water pipes are connected to the fixed circular layer 41. The water inlet or outlet of the water pipes can pass through the impeller 46, causing the impeller 46 to rotate, generating a dynamic effect and achieving dynamic balance. The upper floating layer 1 and the lower floating layer 2 can maintain relative balance when there is a certain external force from the outside.

[0054] When the impeller 46 is stuck due to uncertain factors, its blades still exist but are fixed, and the dynamic circle layer 42 will rotate to achieve dynamic balance. At the same time, the liquid moves out from the liquid outlet 45 horizontally in a circle to maintain dynamic balance.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water level controller for a water pump, characterized in that: It comprises an upper floating layer (1) and a lower floating layer (2), wherein the upper floating layer (1) and the lower floating layer (2) are both hollow inside, and the outer sides of the upper floating layer (1) and the lower floating layer (2) are both provided with a control port (21) for controlling the hollowness of the upper floating layer (1) and the lower floating layer (2); The upper floating layer (1) and the lower floating layer (2) are penetrated from top to bottom by a switch control part (3), the upper and lower ends of the switch control part (3) are used to contact the upper and lower surfaces of the liquid container, and when the switch control part (3) moves in the upper and lower directions along the upper floating layer (1) and the lower floating layer (2), it controls the switch of the water pump; A water inlet control unit (4) is also installed between the upper floating layer (1) and the lower floating layer (2), and the outer side of the water inlet control unit (4) is connected to a water pump water pipe and is used to control the position of water inlet or water outlet to be flush with the water inlet control unit (4).

2. The water level controller of the water pump according to claim 1, characterized in that: The upper floating layer (1) and the lower floating layer (2) are arranged one above the other, the upper floating layer (1) and the lower floating layer (2) are symmetrical, both the upper floating layer (1) and the lower floating layer (2) are penetrated by mounting holes (22), and a limiting ring (23) is fixed on one side of the upper floating layer (1) and the lower floating layer (2) facing outwards; The switch control part (3) comprises two groups of fixed layers (31), a hollow tube layer 1 (32) and a hollow tube layer 2 (33). The two groups of fixed layers (31) are respectively fixed in two circles of limiting rings 1 (23). The hollow tube layer 2 (33) is fixedly sleeved inside the hollow tube layer 1 (32). The hollow tube layer 1 (32) and the hollow tube layer 2 (33) pass through two mounting holes (22). When the hollow tube layer 1 (32) and the hollow tube layer 2 (33) have obstructions at the upper and lower ends respectively, the fixed layer (31) can slide along the outer wall of the hollow tube layer 1 (32) to control the water pump switch.

3. The water level controller of the water pump according to claim 2, characterized in that: A magnetic ring (37) is fixed on the inner side of the fixed layer (31); A circle of metal sheet one (35) is fixed on the inner wall of the hollow tube layer one (32) near both ends, and a metal sheet two (36) corresponding to the metal sheet one (35) is fixed on the outer wall of the hollow tube layer two (33). The metal sheet two (36) is in the shape of a thin sheet, and one end thereof extends outward in a petal shape. When the magnetic ring (37) is located outside the metal sheet two (36), the metal sheet two (36) is in contact with the metal sheet one (35); The metal sheet 1 (35) and the metal sheet 2 (36) are electrically connected to the water pump, and the two are connected to control the water pump to stop working.

4. The water level controller of the water pump according to claim 2, characterized in that: The upper and lower ends of the hollow tube layer 1 (32) are both provided with a blocking layer (34), and the blocking layer (34) is used to abut against the fixed layer (31).

5. The water level controller of the water pump according to claim 1, characterized in that: A second limiting ring (24) and a third limiting ring (25) are respectively fixed on opposite surfaces of the upper floating layer (1) and the lower floating layer (2); The water inlet control part (4) comprises a fixed circular layer (41), a moving circular layer (42) and an impeller (46); The fixed circular layer (41) is rotatably connected to the movable circular layer (42); the fixed circular layer (41) is fixed in the second limiting ring (24); the movable circular layer (42) is rotatably mounted in the third limiting ring (25); the impeller (46) is fixed in the movable circular layer (42); the interiors of the fixed circular layer (41) and the movable circular layer (42) are both hollow; the interior of the fixed circular layer (41) is communicated with the interior of the movable circular layer (42); a liquid outlet (45) is provided on the outer side of the movable circular layer (42) near the lower end; and the outer side of the fixed circular layer (41) is connected to a water pump pipeline.

6. The water level controller of the water pump according to claim 5, characterized in that: The water inlet control unit (4) further comprises a first bearing (43) and a second bearing (44); the fixed circular layer (41) and the movable circular layer (42) are connected via the first bearing (43); and the movable circular layer (42) and the limiting ring (25) are connected via the second bearing (44).

7. The water level controller of the water pump according to claim 1, characterized in that: A connecting shaft (52) is fixed between the upper floating layer (1) and the lower floating layer (2), a circle of limit frames (51) are fixed on the opposite surfaces of the upper floating layer (1) and the lower floating layer (2), and grids (5) are fixed in four directions on the outside of the two groups of limit frames (51).

8. The water level controller of the water pump according to claim 7, characterized in that: The four grids (5) are all elastic and cover the water inlet control part (4).

Citation Information

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