Submersible pump capable of preventing sludge blockage
By using a combination of sensing shaft and contact sensor in the submersible pump, the impeller status is monitored in real time and the power is automatically cut off, which solves the problems of reduced submersible pump efficiency and motor damage caused by sludge blockage and foreign body junction, and achieves efficient operation and long life of the submersible pump.
Patent Information
- Application Number
- CN202421514457.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-28
AI Technical Summary
During use, existing submersible pumps are prone to reduced pumping efficiency or fail to work normally due to sludge blockage. When foreign objects are stuck between the impeller and the motor, it is difficult to judge and deal with it in time, which can easily lead to motor damage.
A submersible pump including a motor, mounting shell, impeller and filter cover is designed. It uses a combination of sensing shaft and contact sensors. Through the push of the sensing shaft and signal feedback of the contact sensor, the status of the impeller is monitored in real time, and automatically cuts off power when sludge or foreign objects are stuck to avoid motor damage.
It effectively prevents the efficiency reduction and damage of submersible pumps caused by sludge blockage, promptly cut off the power to protect the motor, extend the service life of the submersible pump, and facilitates cleaning and maintenance.
Smart Images
Figure CN222615605U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of submersible pumps, in particular to a submersible pump capable of preventing sludge clogging. Background Art
[0002] Submersible pumps are widely used equipment. When working, they are directly located in the water, pumping water in rivers, reservoirs, etc. to a higher place to meet the need to raise the water level. In order to minimize the sludge and debris in the water entering the volute with the water flow, causing damage to the impeller or malfunction, existing submersible pumps generally have a filter compartment at the lower end. The filter holes are distributed on the surface of the compartment. The debris will not enter the volute due to the blocking of the filter holes of the compartment, which plays a good protective role for the impeller. However, the use of the compartment mentioned above will bring a disadvantage, that is, after the sludge, debris, etc. block some of the filter holes, the amount of water entering the volute will be reduced, and the pumping efficiency of the submersible pump will be reduced; there is even a chance that the filter holes are completely blocked by sludge, resulting in the submersible pump being unable to perform pumping operations and idling damage.
[0003] In the prior art, if a foreign object is stuck between the impeller and the motor and an abnormal symptom occurs, the operation of the submersible pump is stopped, and then an endoscope installed in the housing is used to check the inside to determine whether there is an abnormality. The submersible pump is running, but the location where the submersible pump is installed cannot be clearly confirmed due to the turbidity inside the impeller in the box. Not only can it not be judged whether it is running, but there is also a problem that if it continues to run without careful judgment, the entire submersible motor must be replaced.
[0004] In the related art, during the use of the submersible pump, a filtering mechanism is set at the water inlet to prevent impurities in the water from entering the submersible pump. However, the filter screen of the filtering mechanism cannot clean the sticky mud or other impurities on the surface, causing it to be blocked after long-term use and affecting the normal use of the submersible pump. Utility Model Content
[0005] In view of the deficiencies in the prior art, the utility model provides a submersible pump that prevents sludge clogging. In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A submersible pump for preventing sludge clogging comprises a motor, a mounting shell, an impeller and a filter cover, the motor is fixedly connected to the mounting shell, the rotating shaft of the motor is rotatably mounted on the mounting shell, the impeller is fixedly mounted at the end of the rotating shaft and is located in the mounting shell, a drain port is provided on the side of the mounting shell, and the filter cover is fixedly mounted on the bottom of the mounting shell, the mounting shell is provided with an annular groove, the groove is arranged around the rotating shaft, a through hole leading to the impeller is provided on the groove, a sensing shaft with an end located at the edge of the impeller is slidably connected in the through hole, a spring is sleeved on the sensing shaft, a locking head is fixedly connected to the groove, a connecting hole for allowing the sensing shaft to pass through is provided on the locking head, one end of the spring is fixed on the sensing shaft, and the other end abuts against the locking head, a contact sensor located at a position directly opposite to the sensing shaft is also fixedly connected in the groove, and the contact sensor is connected to a control element for controlling the start and stop of the motor.
[0007] Furthermore, the through hole is located on one side of the impeller and is fixedly connected with an annular retaining ring, the retaining ring is slidably connected to the sensing shaft, and the spring is against the retaining ring.
[0008] Furthermore, an end cap is fixedly connected to the end of the sensing shaft adjacent to the contact sensor, and the diameter of the end cap is larger than the diameter of the connecting hole.
[0009] Furthermore, an oblique opening is provided on the end of the sensing shaft adjacent to the impeller, and the oblique opening faces the tangential direction of the impeller.
[0010] Furthermore, the sensing shaft is keyed to the locking head.
[0011] Furthermore, the locking head is symmetrically provided with screws, and the screws are respectively threadedly connected to the locking head and the mounting shell, so as to detachably fix the locking head to the mounting shell.
[0012] Compared with the prior art, the utility model has the following beneficial effects:
[0013] By sliding the sensing shaft installed on the mounting shell, when sludge or foreign matter gets stuck at the impeller, the accumulated sludge will push the sensing shaft to move upward, causing the sensing shaft to come into contact with the contact sensor. The contact sensor transmits the information of the sticking to the control room through the control element to control the motor to cut off the power supply, thus avoiding the risk of damage to the motor due to the increased load of the submersible pump, facilitating timely cleaning of the submersible pump, and protecting the normal use of the submersible pump. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:
[0015] Figure 1 This is a schematic diagram of the main view of an embodiment of the utility model;
[0016] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of node A in the middle.
[0017] In the above drawings: motor 1, mounting shell 2, impeller 3, filter cover 4, drain port 5, groove 6, through hole 7, sensor shaft 8, spring 9, locking head 10, contact sensor 11, retaining ring 12, end cap 13, bevel 14, screw 15. DETAILED DESCRIPTION
[0018] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0019] Please refer to Figure 1 , Figure 2 As shown, a submersible pump for preventing sludge clogging comprises a motor 1, a mounting shell 2, an impeller 3 and a filter cover 4, wherein the motor 1 is fixedly connected to the mounting shell 2, the rotating shaft of the motor 1 is rotatably mounted on the mounting shell 2, the impeller 3 is fixedly mounted at the end of the rotating shaft and is located in the mounting shell 2, a drain port 5 is arranged on the side of the mounting shell 2, and the filter cover 4 is fixedly mounted on the bottom of the mounting shell 2, the mounting shell 2 is provided with an annular groove 6, the groove 6 is arranged around the rotating shaft, a through hole 7 leading to the impeller 3 is arranged on the groove 6, a sensing shaft 8 whose end is located at the edge of the impeller 3 is slidably connected in the through hole 7, a spring 9 is sleeved on the sensing shaft 8, a locking head 10 is fixedly connected to the groove 6, the locking head 10 is provided with a connecting hole for allowing the sensing shaft 8 to pass, one end of the spring 9 is fixed on the sensing shaft 8, and the other end abuts against the locking head 10, a contact sensor 11 located at a position directly opposite to the sensing shaft 8 is also fixedly connected in the groove 6, and the contact sensor 11 is connected to a control element for controlling the start and stop of the motor 1.
[0020] Working principle: When the motor 1 is powered on, the rotating shaft of the motor 1 rotates, driving the impeller 3 to rotate. The water and sludge at the bottom of the submersible pump form a vortex, which first passes through the filter cover 4 at the bottom to isolate the larger volume of agglomerated foreign matter. After passing through the mounting shell 2, it is discharged through the drain port 521 on the side of the mounting shell 2, thereby achieving the purpose of automatic pumping. During the working process, due to the large vortex generated by the impeller 3, some small foreign matter such as sludge or branches will pass through the filter cover 4 and be stuck between the impeller 3 and the mounting shell 2, so that a force will be applied to the sensor shaft 8. After the sensor shaft 8 is pressed, it will be pushed upward, and the sensor shaft 8 will conflict with the contact sensor 11. After the contact sensor 11 obtains the signal, it will quickly feed back the information to the control room to respond to the power failure of the motor 1 to avoid the problem of damage to the motor 1 due to excessive load. After the impeller 3 is cleaned, the spring 9 drives the sensor shaft 8 to reset for the next use.
[0021] In this embodiment, please refer to Figure 2As shown, the through hole 7 is located on one side of the impeller 3 and is fixedly connected with an annular retaining ring 12, the retaining ring 12 is slidably connected with the sensing shaft 8, and the spring 9 is against the retaining ring 12. The retaining ring 12 is used to limit the sensing shaft 8 to prevent the sensing shaft 8 from extending out of the impeller 3 and getting stuck on the impeller 3.
[0022] In this embodiment, please refer to Figure 2 As shown, an end cap 13 is fixedly connected to the end of the sensing shaft 8 adjacent to the contact sensor 11, and the diameter of the end cap 13 is larger than the diameter of the connecting hole. The end cap 13 facilitates the contact between the sensing shaft 8 and the contact sensor 11, and prevents the sensing shaft 8 from slipping into the impeller 3.
[0023] In this embodiment, please refer to Figure 2 As shown, the end of the sensing shaft 8 adjacent to the impeller 3 is provided with an oblique opening 14, and the oblique opening 14 faces the tangent direction of the impeller 3. The oblique opening 14 is used to facilitate the accumulation of sludge at the oblique opening 14 of the sensing shaft 8, so as to facilitate pushing the sensing shaft 8 to contact the contact sensor 11, so as to control the start and stop of the motor 1.
[0024] In this embodiment, the sensing shaft 8 is key-connected to the locking head 10. By means of the key connection, the position of the bevel 14 is kept corresponding to the tangent line of the outer diameter of the impeller 3.
[0025] In this embodiment, please refer to Figure 2 As shown, the locking head 10 is symmetrically provided with screws 15, and the screws 15 are respectively threadedly connected with the locking head 10 and the mounting shell 2, so as to detachably fix the locking head 10 on the mounting shell 2. It is convenient to install and replace the sensing shaft 8 and is easy to use.
[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A submersible pump for preventing sludge clogging, comprising a motor, a mounting shell, an impeller and a filter cover, wherein the motor is fixedly connected to the mounting shell, the rotating shaft of the motor is rotatably mounted on the mounting shell, the impeller is fixedly mounted at the end of the rotating shaft and is located in the mounting shell, a drainage port is provided on the side of the mounting shell, and the filter cover is fixedly mounted at the bottom of the mounting shell, characterized in that: The mounting shell is provided with an annular groove, which is arranged around the rotating shaft. The groove is provided with a through hole leading to the impeller. A sensing shaft whose end is located at the edge of the impeller is slidably connected in the through hole. A spring is sleeved on the sensing shaft. A locking head is fixedly connected to the groove. A connecting hole for allowing the sensing shaft to pass through is provided on the locking head. One end of the spring is fixed on the sensing shaft, and the other end abuts against the locking head. A contact sensor that is located opposite to the sensing shaft is also fixedly connected in the groove. The contact sensor is connected to a control element that controls the start and stop of the motor.
2. A submersible pump for preventing sludge clogging according to claim 1, characterized in that: The through hole is located at one side of the impeller and is fixedly connected with an annular retaining ring. The retaining ring is slidably connected to the sensing shaft, and the spring is against the retaining ring.
3. A submersible pump for preventing sludge clogging according to claim 2, characterized in that: An end cap is fixedly connected to the end of the sensing shaft adjacent to the contact sensor, and the diameter of the end cap is larger than the diameter of the connecting hole.
4. A submersible pump for preventing sludge clogging according to claim 1, characterized in that: An oblique opening is provided on the end of the sensing shaft adjacent to the impeller, and the oblique opening faces the tangent direction of the impeller.
5. A submersible pump for preventing sludge clogging according to claim 4, characterized in that: The sensing shaft is key-connected with the locking head.
6. A submersible pump for preventing sludge clogging according to claim 1, characterized in that: The locking head is symmetrically provided with screws, and the screws are respectively threadedly connected with the locking head and the mounting shell to detachably fix the locking head on the mounting shell.