A sewage pump with water shortage protection

Abstract

The utility model provides a kind of sewage pump with water shortage protection, including water pump main body and motor main body, water pump main body includes base, pump blade and pump shell, base is set in pump shell bottom, the output shaft of motor main body is inserted into pump shell and is fixed with pump blade, pump shell upper end is provided with pump barrel, pump barrel outside is provided with float ball assembly, pump barrel inside is provided with sensor assembly, when float ball assembly touches sensor assembly, drive water pump to stop running, by setting float ball assembly and sensor assembly, when sewage pump appears water shortage condition, water level drops so that float ball assembly touches sensor assembly, can drive motor main body to stop running in time, effectively avoid the damage caused by water shortage and idling of sewage pump, prolong the service life of equipment.

Description

Technical Field

[0001] This utility model relates to submersible pumps, and more particularly, to a sewage pump with water shortage protection. Background Technology

[0002] A submersible pump is a type of water pump that operates underwater. It runs entirely submerged in water and relies on liquid to cool the motor. If it operates for a long time without water or in a water-scarce state, it will cause the motor to overheat and be damaged.

[0003] Submersible pumps are usually used with float switches to automatically shut off the pump when the liquid level is low, thus preventing the pump from burning out due to overheating. However, in sewage treatment, the situation in sewage tanks is more complex. When there are a large number of large debris such as plastic and foam floating on the surface of the sewage, it can easily affect the accuracy of the float switch. When the liquid level is lower than the submersible pump motor, the pump is prone to burnout. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a sewage pump with water shortage protection, which has its own liquid level protection function.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a sewage pump with water shortage protection, including a pump body and a motor body. The pump body includes a base, pump blades and a pump casing. The base is located at the bottom of the pump casing. The output shaft of the motor body extends into the pump casing and is fixed to the pump blades. A pump barrel is provided at the upper end of the pump casing. A float assembly is provided on the outside of the pump barrel. A sensor assembly is provided on the inside of the pump barrel. When the float assembly touches the sensor assembly, it drives the pump to stop running.

[0006] Preferably, the float assembly includes a float body and a guide block, and a sliding groove is provided on the side end of the pump cylinder, with the guide block slidably disposed in the sliding groove.

[0007] Preferably, a protective net is also provided on the outside of the pump cylinder, and an isolation cavity is formed between the protective net and the pump cylinder, and the float body is slidably disposed in the isolation cavity.

[0008] Preferably, the sensor assembly includes a controller and a micro switch, the micro switch being electrically connected to the controller, the controller being electrically connected to the power supply of the motor body, the micro switch being disposed at the bottom of the pump cylinder, and the motor body stopping operation when the float assembly touches the micro switch.

[0009] Preferably, the sensor assembly further includes a second micro switch, which is disposed at the top of the pump cylinder. When the float assembly stops touching the second micro switch, the motor body reduces its operating power.

[0010] Preferably, a water supply pipe is also connected to the side end of the pump casing. The water supply pipe is square and is wound around the outside of the motor body. A pressure rod is also provided on the outside of the motor body.

[0011] Preferably, the base is fixed to the sewage tank by expansion screws.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting up a float assembly and a sensor assembly, when the sewage pump is short of water, the water level drops and the float assembly touches the sensor assembly, which can drive the motor body to stop running in time. This effectively avoids damage caused by the sewage pump running dry due to lack of water, extends the service life of the equipment, and has a higher fault tolerance rate than a float switch. 2. The cooperation between the guide block and the sliding groove ensures the stability of the float body's movement, enabling it to accurately touch the micro switch and improving the reliability of the entire water shortage protection device. The protective net on the outside of the pump cylinder forms an isolation cavity with the pump cylinder, and the float body is placed in the isolation cavity to prevent external debris from interfering with the normal movement of the float body, further improving the stability of the water shortage protection function. 3. By setting micro switch two, when the float assembly stops touching micro switch two, the motor body reduces the operating power. This graded control method can not only ensure the continuous operation of sewage discharge to a certain extent, but also avoid the problem of motor overheating caused by high power operation of the motor body when the water volume is insufficient. 4. By winding the water pipe around the outside of the motor, it is convenient to store and organize the water pipe, while also allowing water to pass through the outside of the motor even when the liquid level is low, which reduces the motor temperature to some extent. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of Embodiment 1; Figure 2 This is a cross-sectional schematic diagram of Example 1; Figure 3 This is a partial schematic diagram of Embodiment 1; Figure 4 This is a cross-sectional schematic diagram of Example 2.

[0014] Reference numerals in the attached drawings: 1. Pump body; 2. Motor body; 3. Base; 4. Pump impeller; 5. Pump casing; 6. Pump barrel; 7. Float assembly; 8. Sensor assembly; 9. Float body; 10. Guide block; 11. Sliding groove; 12. Protective net; 13. Isolation chamber; 14. Controller; 15. Microswitch one; 16. Microswitch two; 17. Water delivery pipe; 18. Pressure rod. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered. Example

[0016] A sewage pump with water shortage protection includes a pump body 1 and a motor body 2. The pump body 1 includes a base 3, a pump blade 4 and a pump casing 5. The base 3 is located at the bottom of the pump casing 5. The output shaft of the motor body 2 extends into the pump casing 5 and is fixed to the pump blade 4. A pump cylinder 6 is provided at the upper end of the pump casing 5. A float assembly 7 is provided on the outside of the pump cylinder 6 and a sensor assembly 8 is provided on the inside of the pump cylinder 6. When the float assembly 7 touches the sensor assembly 8, it drives the pump to stop running.

[0017] The float assembly 7 includes a float body 9 and a guide block 10. A sliding groove 11 is provided on the side end of the pump cylinder 6. The guide block 10 is slidably disposed in the sliding groove 11. A protective net 12 is also provided on the outside of the pump cylinder 6. An isolation cavity 13 is formed between the protective net 12 and the pump cylinder 6. The float body 9 is slidably disposed in the isolation cavity 13.

[0018] The sensor assembly 8 includes a controller 14 and a micro switch 15. The micro switch 15 is electrically connected to the controller 14, and the controller 14 is electrically connected to the power supply of the motor body 2. The micro switch 15 is located at the bottom of the pump cylinder 6. When the float assembly 7 touches the micro switch 15, the motor body 2 stops running.

[0019] When the sewage pump is in normal operation, the float assembly 7 is positioned higher in the pump cylinder 6 due to buoyancy, and is not in contact with the micro switch 15. The motor body 2 maintains normal operating power. As the sewage discharge process proceeds, if the water level in the sewage tank gradually decreases, the float assembly 7 will descend accordingly. When the water level drops to a certain level, the float body 9 in the float assembly 7 touches the micro switch 15 located at the bottom of the pump cylinder 6. The micro switch 15 transmits a signal to the controller 14, and the controller 14 immediately cuts off the power to the motor body 2, causing the motor body 2 to stop running, thereby preventing damage caused by the sewage pump running dry due to lack of water.

[0020] Furthermore, the protective net 12 installed on the outside of the pump cylinder 6 and the isolation cavity 13 formed between the pump cylinder 6 provide a relatively independent movement space for the float body 9, free from external debris. The sliding arrangement of the guide block 10 within the sliding groove 11 ensures the stability and accuracy of the movement of the float body 9, enabling it to precisely touch the micro switch, further improving the reliability of the entire water shortage protection device.

[0021] The sensor assembly 8 also includes a second microswitch 16, which is also electrically connected to the controller 14. The second microswitch 16 is located at the top of the pump cylinder 6. When the float assembly 7 stops touching the second microswitch 16, the motor body 2 reduces its operating power. When the water level is high, and the float assembly 7 touches the second microswitch 16 at the top of the pump cylinder 6, the motor body 2 maintains normal operating power. Conversely, when the water level drops and the float assembly 7 stops touching the second microswitch 16, the controller 14 receives a signal, causing the motor body 2 to reduce its operating power. This tiered control method ensures efficient sewage discharge when water volume is sufficient, while preventing overheating caused by high-power operation of the motor body 2 when water volume is insufficient.

[0022] The base 3 is fixed to the sewage tank with expansion bolts, which ensures the stability and safety of the sewage pump during operation, and at the same time ensures the stable operation of the float assembly 7. Example

[0023] The difference between Embodiment 2 and Embodiment 1 is that a water supply pipe 17 is also connected to the side end of the pump casing 5. The water supply pipe 17 is square and is wound around the outside of the motor body 2. A pressure rod 18 is also provided on the outside of the motor body 2. The pressure rod 18 is used to limit the position of the water supply pipe 17. By winding the water supply pipe 17 around the outside of the motor, it is convenient to store and organize the water supply pipe 17. At the same time, when the liquid level is low, the water can still cool the motor through the water supply pipe 17, thereby reducing the temperature of the motor to a certain extent. Using a square water supply pipe 17 can increase the contact area between the water supply pipe 17 and the motor casing.

[0024] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A sewage pump with water shortage protection, comprising a pump body (1) and a motor body (2), characterized in that: The water pump body (1) includes a base (3), a pump blade (4) and a pump casing (5). The base (3) is located at the bottom of the pump casing (5). The output shaft of the motor body (2) extends into the pump casing (5) and is fixed to the pump blade (4). A pump cylinder (6) is provided at the upper end of the pump casing (5). A float assembly (7) is provided on the outside of the pump cylinder (6). A sensor assembly (8) is provided on the inside of the pump cylinder (6). When the float assembly (7) touches the sensor assembly (8), the water pump is driven to stop running.

2. A sewage pump with water shortage protection according to claim 1, characterized in that: The float assembly (7) includes a float body (9) and a guide block (10). A sliding groove (11) is provided on the side end of the pump cylinder (6), and the guide block (10) is slidably disposed in the sliding groove (11).

3. A sewage pump with water shortage protection according to claim 2, characterized in that: A protective net (12) is also provided on the outside of the pump cylinder (6), and an isolation cavity (13) is formed between the protective net (12) and the pump cylinder (6). The float body (9) is slidably disposed in the isolation cavity (13).

4. A sewage pump with water shortage protection according to claim 1, characterized in that: The sensor assembly (8) includes a controller (14) and a micro switch (15). The micro switch (15) is electrically connected to the controller (14), and the controller (14) is electrically connected to the power supply of the motor body (2). The micro switch (15) is located at the bottom of the pump cylinder (6). When the float assembly (7) touches the micro switch (15), the motor body (2) stops running.

5. A sewage pump with water shortage protection according to claim 4, characterized in that: The sensor assembly (8) also includes a second micro switch (16), which is located on the top of the pump cylinder (6). When the float assembly (7) stops touching the second micro switch (16), the motor body (2) reduces its operating power.

6. A sewage pump with water shortage protection according to claim 1, characterized in that: The pump casing (5) is also connected to a water pipe (17) on its side. The water pipe (17) is square and is wound around the outside of the motor body (2). A pressure rod (18) is also provided on the outside of the motor body (2).

7. A sewage pump with water shortage protection according to claim 1, characterized in that: The base (3) is fixed to the sewage tank by expansion screws.

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