Anti-blocking centrifugal pump

Abstract

The utility model provides an anti-blocking centrifugal pump, and belongs to the field of pumps. The problem that an existing centrifugal pump is prone to being blocked is solved. The anti-blocking centrifugal pump comprises a pump body with a water inlet port, a large-diameter water inlet cavity is formed in the water inlet port, a partition plate is arranged in the water inlet cavity and separates the water inlet cavity from the interior of the pump body, a cutting device is arranged in the water inlet cavity and used for cutting and mincing fiber impurities, and the cutting device comprises a connecting shaft and a plurality of cutting blades. The connecting shaft and an impeller driving shaft in the pump body are coaxially arranged, the multiple cutting blades are evenly distributed at the end of the connecting shaft in the circumferential direction, cutting edges are arranged at the front ends of the cutting blades, multiple sawteeth arranged in sequence are arranged at the front ends of the cutting edges, a center hole allowing the connecting shaft to penetrate is formed in the center of the partition plate, and the partition plate is further provided with multiple water passing holes with large calibers. And the water through holes are circumferentially distributed at intervals along the axis of the central hole. The utility model has the advantage of anti-clogging.

Description

Technical Field

[0001] This utility model belongs to the field of pumps, and relates to a centrifugal pump, and particularly to an anti-clogging centrifugal pump. Background Technology

[0002] Centrifugal pumps work by using the rotation of an impeller to cause water to move in a centrifugal motion. Before starting the pump, the pump casing and suction pipe must be filled with water. Then, the motor is started, and the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown towards the outer edge of the impeller, flowing into the pump's discharge pipe through the flow channel of the volute casing.

[0003] The existing centrifugal pumps have relatively small inlet diameters, which can easily cause tangled fibrous impurities to accumulate and clog the inlet, resulting in poor fluid flow and severely affecting the working efficiency of the centrifugal pump. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by providing an anti-clogging centrifugal pump that can cut and crush fibrous impurities, thereby solving these problems.

[0005] The purpose of this utility model can be achieved through the following technical solution: a clog-proof centrifugal pump, comprising a pump body with a water inlet port, characterized in that a large-diameter water inlet chamber is provided at the water inlet port, a partition is provided in the water inlet chamber to separate the water inlet chamber from the inside of the pump body, and a cutting device is provided in the water inlet chamber for cutting and shredding fiber impurities;

[0006] The cutting device includes a connecting shaft and multiple cutting blades. The connecting shaft is coaxially arranged with the impeller drive shaft inside the pump body, and the multiple cutting blades are evenly distributed circumferentially at the end of the connecting shaft.

[0007] The cutting blade has a cutting edge at its front end, and the cutting edge has multiple serrations arranged in sequence at its front end.

[0008] The partition has a central hole for the connecting shaft to pass through, and the partition also has multiple large-diameter water passage holes, which are distributed circumferentially along the axis of the central hole.

[0009] In the aforementioned anti-clogging centrifugal pump, the saw teeth are a continuous acute-angle structure, and the spacing between the saw teeth decreases along the water flow direction.

[0010] In the aforementioned anti-clogging centrifugal pump, the total flow area of ​​the water passage is not less than 70% of the cross-sectional area of ​​the inlet port.

[0011] In the aforementioned anti-clogging centrifugal pump, the rotation trajectory of the cutting blades covers more than 90% of the cross-sectional area of ​​the inlet chamber.

[0012] In the aforementioned anti-clogging centrifugal pump, the connecting shaft and the impeller drive shaft are rigidly connected by a spline or coupling to achieve synchronous rotation.

[0013] Compared to existing technologies, this anti-clogging centrifugal pump integrates active cutting into the inlet chamber, upgrading the traditional centrifugal pump's filtration and cleaning mode to a pulverizing and discharging mode, fundamentally solving the problem of fiber clogging. Its serrated, decreasing blades and fully covered impurities balance cutting efficiency and fluid performance, making it suitable for high-impurity applications such as wastewater treatment, textiles, and agricultural irrigation. Attached Figure Description

[0014] Figure 1 This is a partial cross-sectional schematic diagram of the anti-clogging centrifugal pump.

[0015] In the diagram, 1 is the pump body; 2 is the inlet chamber; 3 is the baffle plate; 4 is the cutting device; 5 is the connecting shaft; 6 is the cutting blade; 7 is the blade; 8 is the saw tooth; 9 is the center hole; and 10 is the water passage hole. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figure 1 As shown, this anti-clogging centrifugal pump includes a pump body 1 with a water inlet port. A large-diameter water inlet chamber 2 is provided at the water inlet port. A partition 3 is provided inside the water inlet chamber 2 to separate the water inlet chamber 2 from the inside of the pump body 1. A cutting device 4 is provided inside the water inlet chamber 2 for cutting and shredding fiber impurities. The cutting device 4 includes a connecting shaft 5 and multiple cutting blades 6. The connecting shaft 5 is coaxially arranged with the impeller drive shaft inside the pump body 1. Multiple cutting blades 6 are evenly distributed circumferentially at the end of the connecting shaft 5. The front end of the cutting blade 6 is provided with a blade 7. The front end of the blade 7 is provided with multiple sequentially arranged serrations 8. The partition 3 is provided with a central hole 9 for the connecting shaft 5 to pass through. The partition 3 is also provided with multiple large-diameter water passage holes 10, which are circumferentially distributed along the axis of the central hole 9.

[0018] The sawtooth 8 has a continuous acute-angle structure, and the spacing between the sawtooth 8 decreases along the water flow direction. The total flow area of ​​the water passage 10 is not less than 70% of the cross-sectional area of ​​the water inlet port. The rotation trajectory of the cutting blade 6 covers more than 90% of the cross-sectional area of ​​the water inlet chamber 2. The connecting shaft 5 is rigidly connected to the impeller drive shaft through a spline or coupling to achieve synchronous rotation.

[0019] By integrating active cutting into the inlet chamber 2, the traditional centrifugal pump's filtration and cleaning mode is upgraded to a pulverizing and discharging mode, fundamentally solving the problem of fiber clogging. Its serrated 8-tooth progressive blade 7 and fully covered blades balance cutting efficiency and fluid performance, making it suitable for high-impurity applications such as sewage treatment, textiles, and agricultural irrigation.

[0020] Working principle

[0021] Water flows into the inlet chamber 2 through the large-diameter inlet port, and the chamber design increases the space for impurity treatment. A baffle 3 inside the chamber separates the inlet chamber 2 from the pump interior, allowing water to enter the pump body 1 only through the water passage holes 10 on the baffle 3, while preventing large impurities from entering directly. The cutting device 4 is driven by the connecting shaft 5, rotating rigidly synchronously with the impeller drive shaft inside the pump (via a spline / coupling). Multiple cutting blades 6 are circumferentially distributed at the end of the connecting shaft 5, with serrated cutting edges 7 at their front ends. The serrations 8 have a continuous acute-angle structure, and the spacing decreases along the water flow direction, achieving progressive cutting: large fibers are first hooked and torn by the serrations 8, and small fragments are further pulverized by subsequent finer serrations 8. The pulverized micro-impurities are carried by the water flow through the water passage holes 10 of the baffle 3 (total flow area ≥ 70% of the inlet cross-sectional area), enter the pump body 1, and are discharged by the impeller, avoiding blockage of the flow channel. The rotation trajectory of the cutting blades 6 covers more than 290% of the inlet chamber area, ensuring no dead zones in the treatment.

[0022] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0023] Although this document uses a considerable amount of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A clog-resistant centrifugal pump, comprising a pump body (1) with an inlet port, characterized in that, The water inlet port is provided with a large-diameter water inlet chamber (2), and the water inlet chamber (2) is provided with a partition (3) to separate the water inlet chamber (2) from the inside of the pump body (1). The water inlet chamber (2) is provided with a cutting device (4) for cutting and shredding fiber impurities. The cutting device (4) includes a connecting shaft (5) and multiple cutting blades (6). The connecting shaft (5) is coaxially arranged with the impeller drive shaft inside the pump body (1), and the multiple cutting blades (6) are evenly distributed circumferentially at the end of the connecting shaft (5). The cutting blade (6) has a blade (7) at its front end, and the blade (7) has a plurality of sequentially arranged serrations (8) at its front end. The partition (3) has a central hole (9) for the connecting shaft (5) to pass through. The partition (3) also has a number of large-diameter water holes (10) which are distributed circumferentially along the axis of the central hole (9).

2. The anti-clogging centrifugal pump according to claim 1, characterized in that, The saw teeth (8) are a continuous acute angle structure, and the spacing between the saw teeth (8) decreases along the direction of water flow.

3. The anti-clogging centrifugal pump according to claim 1, characterized in that, The total flow area of ​​the water passage (10) is not less than 70% of the cross-sectional area of ​​the water inlet port.

4. The anti-clogging centrifugal pump according to claim 1, characterized in that, The rotation trajectory of the cutting blade (6) covers more than 90% of the cross-section of the water inlet cavity (2).

5. The anti-clogging centrifugal pump according to claim 1, characterized in that, The connecting shaft (5) is rigidly connected to the impeller drive shaft via a spline or coupling to achieve synchronous rotation.

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