High-lift submersible electric pump

Abstract

The application belongs to the technical field of submersible pumps, and provides a high-lift submersible electric pump, which comprises a motor, a transmission box, a protective cover and a pump body connected in sequence, the output shaft of the motor is connected with the input shaft of a coupler, the output shaft of the coupler is connected with the impeller of the pump body through the protective cover, the coupler is fixed in the transmission box, a gear assembly is further arranged in the transmission box, a cleaning device is connected to the outside of the transmission box, the cleaning device comprises a ring-shaped connecting piece and a cleaner, the cleaner is fixed on the ring-shaped connecting piece and located outside the protective cover, the motor drives the ring-shaped connecting piece to rotate through the gear assembly, when the motor is started, the pump body connected through the coupler is delayed to enter the working state of the cleaning device, so that the ring-shaped connecting piece drives the cleaner to form a cleaning area outside the protective cover in advance.

Description

Technical Field

[0001] This invention belongs to the field of submersible pump technology, and particularly relates to high-lift submersible electric pumps. Background Technology

[0002] A submersible pump is a water-lifting device that integrates a motor and a pump, operating entirely submerged in water. High-lift submersible pumps typically have a single-stage head exceeding 50 meters.

[0003] High-lift submersible pumps typically operate in natural water bodies or more complex underground water environments. Inevitably, they come into contact with debris other than water. Therefore, high-lift submersible pumps are usually equipped with a protective cover outside the pump body's suction port to block and isolate larger contaminants, which can significantly reduce the risk of impeller entanglement.

[0004] However, the mainstream structure of submersible pumps currently is that the motor shaft is directly used as the power input of the pump body. Under this structure, the pump body starts up and enters the working state very quickly. Moreover, due to the large suction at the suction port of high-lift submersible pumps, in some complex water environments, it is inevitable that some weeds and rope-like debris will enter the pump body through the opening on the protective cover, causing the pump impeller to become entangled. Summary of the Invention

[0005] This application addresses the problem of existing high-lift submersible pumps using the motor shaft as the power input to the pump body. This leads to the entry of weeds and rope-like debris into the pump body through openings in the protective cover in complex water environments, causing the pump impeller to become entangled. By setting up a transmission box and using a coupler to delay the pump body's entry into the working state before the cleaning device, the annular connector drives the cleaner to pre-form a cleaning area outside the protective cover. This allows debris to enter the protective cover 30 for cleaning during the pump's high-speed rotation, preventing it from entangled in the impeller.

[0006] The specific technical solution is as follows: A high-lift submersible electric pump includes a motor, a transmission box, a protective cover, and a pump body connected in sequence. The output shaft of the motor is connected to the input shaft of a coupler, and the output shaft of the coupler is connected to the impeller of the pump body through the protective cover. The coupler is fixed inside the transmission box. The transmission box is also equipped with a gear assembly inside, and a cleaning device is connected to the outside of the transmission box. The cleaning device includes an annular connector and a cleaner. The cleaner is fixed on the annular connector and is located outside the protective cover. The motor drives the annular connector to rotate through the gear assembly. When the motor starts, the pump body connected by the coupler delays the cleaning device from entering the working state, so that the annular connector drives the cleaner to pre-form a cleaning area on the outside of the protective cover.

[0007] According to the high-lift submersible electric pump provided by the present invention, the coupler includes a liquid coupler and a magnetic coupler.

[0008] According to the high-lift submersible electric pump provided by the present invention, the annular connector is rotatably connected to the outer wall of the transmission box via a bearing.

[0009] According to the high-lift submersible electric pump provided by the present invention, the cleaner is a cutting blade.

[0010] According to the high-lift submersible electric pump provided by the present invention, the cleaner is a winding rod.

[0011] The beneficial effects of this invention are as follows: The high-lift submersible electric pump of the present invention includes a motor, a transmission box, a protective cover, and a pump body connected in sequence. The output shaft of the motor is connected to the input shaft of a coupler, and the output shaft of the coupler is connected to the impeller of the pump body through the protective cover. The coupler is fixed inside the transmission box. A gear assembly is also provided inside the transmission box, and a cleaning device is connected to the outside of the transmission box. The cleaning device includes an annular connector and a cleaner, with the cleaner fixed to the annular connector and located outside the protective cover. The motor drives the annular connector to rotate through the gear assembly. When the motor starts, the pump body connected through the coupler enters the working state later than the cleaning device, allowing the annular connector to drive the cleaner to pre-form a cleaning area outside the protective cover. During the process of the pump body accelerating to enter a high-speed rotating working state, dirt can enter the protective cover 30 for cleaning, avoiding entanglement of the impeller. Attached Figure Description

[0012] Figure 1 The diagram shown is a structural schematic of the high-lift submersible electric pump of the present invention. Figure 2 The diagram shown is a structural schematic of the transmission box of the present invention.

[0013] Figure label: 10-Motor; 20-Transmission box; 30-Protective cover; 40-Pump body; 50-Cleaning device; 21-Coupler; 21-Housing; 23-Gear assembly; 51-Annular connector; 52-Cleaner; 53-Bearing; 54-Snap ring. Detailed Implementation

[0014] In the following description, certain specific details are set forth in order to provide a thorough understanding of various embodiments. However, those skilled in the art will understand that the invention can be practiced without these details. In other instances, well-known structures have not been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments. Unless the context otherwise requires, throughout the specification and appended claims, the word "comprising" should be interpreted in an open-ended, inclusive sense, i.e., as "including but not limited to".

[0015] Figure 1 This is a schematic diagram of the high-lift submersible electric pump of the present invention, combined with... Figure 1 The submersible electric pump of the present invention includes: a motor 10, a transmission box 20, a protective cover 30, a pump body 40, and a cleaning device 50; wherein, the motor 10, the transmission box 20, the protective cover 30, and the pump body 40 are connected in sequence, the motor 10 is used to drive the pump body 40 to work, and also to drive the cleaning device 50 to work, the protective cover 30 is used to prevent some debris from entering the pump body 40 in the ambient water body, that is, water in the ambient water body enters the pump body 40 through the protective cover 30 and is then discharged from the output pipe.

[0016] A coupler 21 is provided inside the transmission box 20. The shaft of the motor 10 is connected to the input shaft of the coupler 21. The output shaft of the coupler 21 extends through the protective cover 30 into the pump body 40 and is connected to the impeller of the pump body 4. Secondly, the cleaning device 50 is rotatably connected to the outside of the transmission box 20, and the cleaning device 50 is directly driven by the shaft of the motor 10.

[0017] When the motor 10 starts, since the shaft of the motor 10 is not rigidly connected to the impeller of the pump body 40, but is connected through the coupler 21, the high-speed rotation of the motor 10 is not directly transmitted to the pump body 40, but is flexibly started through the coupler 21. This serves two purposes: firstly, it protects the motor 10 and the pump body 40, preventing overload damage to the motor 10 and the pump body 40 during high-speed start-up; secondly, since the cleaning device 50 is directly driven by the motor 10, it also rotates at high speed when the motor starts. Thus, before the pump body 40 enters the high-speed rotation working state, a cleaning area is pre-formed on the outside of the protective cover 30. In this way, during the process of the pump body 40 accelerating into the high-speed rotation working state, dirt inside the protective cover 30 can be cleaned, preventing it from getting entangled in the impeller.

[0018] Specifically, the torque transmission method of the coupler 21 differs from existing rigid connections; it is a flexible connection structure, mainly comprising a liquid coupler and a magnetic coupler. Its characteristic is that it does not directly transmit the torque of the power shaft to the output shaft. Instead, through the coupling structure of the coupler, it increases the torque and speed of the output shaft from a lower value to a higher saturation value. In this application, its more unique feature is that, in conjunction with the cleaning device 50, the pump body 40 enters the working state after the cleaning device 50, thereby allowing the cleaning device 50 to pre-form a cleaning area outside the protective cover 30, maximizing the protective effect of the cleaning device 50.

[0019] In this application, the submersible electric pump is used in water bodies in the natural environment and involves a shaft connection structure. The motor 10, transmission box 20, protective cover 30 and pump body 40 each have their own housing. Therefore, when the shaft passes through any connected housing, a shaft seal structure will be set to ensure the overall sealing performance. This part belongs to existing mature technology, so it will not be described in detail.

[0020] Figure 2 This is a schematic diagram of the transmission box 20 of the present invention, combined with... Figure 2 The transmission box 20 includes a housing 21, a coupler 21, and a gear assembly 23. The coupler 21 and the gear assembly 23 are both fixedly installed in the housing 21. The input shaft of the coupler 21 is fixed to the output shaft of the motor 10 through a coupling. The output shaft of the coupler 21 extends to the outside of the housing 21 and is fixedly connected to the impeller inside the pump body 40 through a protective cover 30, thereby transmitting the power of the motor 10 to the impeller inside the pump body 40 through the coupler 21.

[0021] Combination Figure 2 The side wall of the housing 21 has a notch, through which the gear assembly 23 contacts the cleaning device 50 and transmits power to the cleaning device 50 via the direct drive of the motor 10 and the gear assembly 23, driving the cleaning device 50 to rotate.

[0022] Combination Figure 2 The cleaning device 50 includes an annular connector 51 and a cleaner 52 connected to the annular connector 51, wherein the annular connector 51 is rotatably connected to the housing 21 via a bearing 53, and a retaining ring 54 is provided to fix the bearing 53.

[0023] Optionally, the outer ring of the bearing 53 is interference-fitted with the annular connector 51, and the inner ring of the bearing 53 is interference-fitted with the housing 21, thereby realizing the interconnection of the annular connector 51, the bearing 53 and the housing 21.

[0024] Optionally, the gear assembly 23 consists of several gears, one of which is coaxially connected to the output shaft of the motor 10, another gear meshes with the annular connector 51 through the notch of the housing 21, and the other gears are arranged between the two gears to directly transmit the power of the motor 10 to the annular connector 51. It should be noted that the inner wall of the annular connector 51 has an internal gear ring that meshes with the gear.

[0025] In addition, this application relates to methods of fixed connection, including welding, interference fit insertion, and bolt connection.

[0026] Optionally, the cleaner 52 is a cutter that directly cuts long, thin debris such as aquatic plants and plastic ropes into smaller pieces, reducing the risk of impeller entanglement.

[0027] Optionally, the cleaner 52 is a winding rod, which means that it does not have a cutting effect on long strips of debris such as aquatic plants and plastic ropes. Therefore, when the cleaner 52 rotates at high speed, long strips of debris such as aquatic plants and plastic ropes in the surrounding water will be wrapped around the winding rod and accumulate to form a natural filter layer. This can prevent smaller debris from entering the pump body 40 without affecting the pump body 40's water intake.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A high-lift submersible electric pump, characterized in that, The device includes a motor, a transmission box, a protective cover, and a pump body connected in sequence. The output shaft of the motor is connected to the input shaft of a coupler, and the output shaft of the coupler is connected to the impeller of the pump body through the protective cover. The coupler is fixed inside the transmission box. The transmission box is also equipped with a gear assembly inside, and a cleaning device is connected to the outside of the transmission box. The cleaning device includes an annular connector and a cleaner. The cleaner is fixed on the annular connector and is located outside the protective cover. The motor drives the annular connector to rotate through the gear assembly. When the motor starts, the pump body connected by the coupler delays the cleaning device from entering the working state, so that the annular connector drives the cleaner to pre-form a cleaning area on the outside of the protective cover.

2. The high-lift submersible electric pump according to claim 1, characterized in that, The coupler includes a liquid coupler and a magnetic coupler.

3. The high-lift submersible electric pump according to claim 1, characterized in that, The annular connector is rotatably connected to the outer wall of the transmission box via a bearing.

4. The high-lift submersible electric pump according to claim 1, characterized in that, The cleaner is a cutting blade.

5. The high-lift submersible electric pump according to claim 1, characterized in that, The cleaner is a winding rod.

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