Sewage pump with crushing function

Abstract

The utility model relates to the technical field of sewage pumps, and provides a sewage pump with a crushing function, which comprises a pump body, a wear-resisting plate, an impeller, a pump cover and a pump cover sealing ring, the pump body is fixedly connected with the pump cover; a cavity is formed between the pump body and the pump cover; the pump body is fixedly connected with the wear-resisting plate; a plurality of wear-resisting plate notches are formed in the rear surface of the wear-resisting plate; the wear-resisting plate and the impeller are arranged in the cavity; a protruding ring is integrally arranged behind the impeller; a plurality of protruding ring notches are formed in the protruding ring; a pump cover sealing ring is arranged on the pump cover, and a plurality of sealing ring notches are formed in the pump cover sealing ring; and the pump cover sealing ring and the protruding ring are correspondingly arranged. According to the utility model, impurities wound in front of and behind the impeller can be cut off or crushed, and the shutdown fault of the impeller due to impurity winding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage pumps, in particular to a sewage pump with a crushing function. Background Art

[0002] During emergency rescue operations, sewage pumps are often used for drainage. 70% of sewage pump failures are caused by impellers being entangled with wood fibers or chemical synthetic fibers in the minimum gap between the impeller seal ring and the pump body seal ring, as well as the minimum gap between the impeller seal ring and the pump cover seal ring.

[0003] Impeller entanglement can reduce pump speed, flow rate, and power, leading to a transient overload in the motor and causing it to shut down. Impeller entanglement increases pump maintenance workload, and chemical and synthetic fiber impurities are difficult to clean. Impeller entanglement can also widen the seal ring gap, reducing pump efficiency. A high-power motor is required to meet the same operating conditions. Utility Model Content

[0004] The utility model mainly solves the technical problems in the prior art that the impeller of the sewage pump is easily entangled, the entangled impurities are difficult to clean, and the use of the sewage pump is affected. A sewage pump with a crushing function is proposed to shear or crush the impurities entangled in front of and behind the impeller, so as to avoid the impeller from stopping due to the entanglement of impurities.

[0005] The utility model provides a sewage pump with a crushing function, comprising: a pump body, a wear-resistant plate, an impeller, a pump cover and a pump cover sealing ring;

[0006] The pump body and the pump cover are fixedly connected; there is a cavity between the pump body and the pump cover;

[0007] The pump body is fixedly connected to the wear-resistant plate; a plurality of wear-resistant plate notches are provided on the back of the wear-resistant plate;

[0008] The wear-resistant plate and the impeller are placed in the cavity; a protruding ring is integrally provided behind the impeller; and a plurality of protruding ring notches are provided on the protruding ring;

[0009] A pump cover sealing ring is provided on the pump cover, and a plurality of sealing ring notches are provided on the pump cover sealing ring;

[0010] The pump cover sealing ring is arranged corresponding to the protruding ring.

[0011] Preferably, the impeller has a plurality of blades evenly distributed in the circumferential direction, and the front faces of the blades are open;

[0012] The front edge of the blade contacts the wear-resistant plate, and a flow channel is formed between the blade and the wear-resistant plate.

[0013] Preferably, the impeller is sleeved on the pump shaft.

[0014] Preferably, the outer edges of the protruding ring groove opening, the wear-resistant plate groove opening, and the sealing ring groove opening all adopt an acute angle structure.

[0015] A sewage pump with a crushing function provided by the present utility model, by arranging a plurality of wear-resistant plate groove openings behind the wear-resistant plate, a plurality of sealing ring groove openings on the pump cover sealing ring, and a plurality of protruding ring groove openings on the impeller, can form a scissor effect at the gaps between the wear-resistant plate and the impeller and between the impeller and the pump cover sealing ring when the impeller rotates, so as to cut or crush the impurities wound in front of and behind the impeller, avoid the parking failure of the impeller due to impurity winding, and reduce the probability of the sewage pump failing to stop due to a fault; thereby improving the working efficiency of the sewage pump and prolonging the service life of the sewage pump. The sewage pump of the present utility model has good application prospects in the fields of emergency rescue and other sewage discharge fields. Description of the Drawings

[0016] Figure 1 is a schematic cross-sectional view of the sewage pump with a crushing function provided by the present utility model;

[0017] Figure 2 is a schematic view of the wear-resistant plate provided by the present utility model;

[0018] Figure 3 is a schematic cross-sectional view of the wear-resistant plate provided by the present utility model;

[0019] Figure 4 is a schematic view of the impeller provided by the present utility model;

[0020] Figure 5 is a schematic view of the pump cover sealing ring provided by the present utility model;

[0021] Figure 6 is a schematic cross-sectional view of the pump cover sealing ring provided by the present utility model.

[0022] Reference numerals: 1, pump body; 2, wear-resistant plate; 3, impeller; 4, pump cover; 5, pump cover sealing ring; 6, protruding ring; 7, protruding ring groove opening; 8, wear-resistant plate groove opening; 9, sealing ring groove opening. Detailed Embodiments

[0023] To make the technical problems solved by the present utility model, the technical solutions adopted, and the achieved technical effects clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model are shown in the drawings, rather than all the content.

[0024] As Figure 1As shown in the figure, a sewage pump with a crushing function provided by an embodiment of the present utility model includes: a pump body 1, a wear-resistant plate 2, an impeller 3, a pump cover 4, and a pump cover sealing ring 5.

[0025] The pump body 1 and the pump cover 4 are fixedly connected; there is a cavity between the pump body 1 and the pump cover 4.

[0026] The pump body 1 is fixedly connected to the wear-resistant plate 2; the wear-resistant plate 2 is placed in the cavity; as Figure 2 、 3 shown, a plurality of wear-resistant plate notches 8 are provided on the back of the wear-resistant plate 2. The wear-resistant plate 2 is used to cooperate with the impeller 3. The wear-resistant plate 2 is integrally annular, with a single-sided arc-shaped cross-section. The bending arc of the wear-resistant plate 2 is adapted to the blade shape of the impeller 3 and ensures a very small gap (about 0.3 - 0.5 mm) between the wear-resistant plate 2 and the impeller 3.

[0027] The impeller 3 is placed in the cavity; the impeller 3 is sleeved on the pump shaft. As Figure 4 shown, a protruding ring 6 is integrally provided on the back of the impeller 3; a plurality of protruding ring notches 7 are provided on the protruding ring 6. As Figure 5 、 6 shown, a pump cover sealing ring 5 is provided on the pump cover 4, and a plurality of sealing ring notches 9 are provided on the pump cover sealing ring 5; the pump cover sealing ring 5 is arranged corresponding to the protruding ring 6. Since a plurality of protruding ring notches 7 are provided on the impeller 3, sealing ring notches 9 are provided on the pump cover sealing ring 5, and the pump cover sealing ring 5 is arranged corresponding to the protruding ring 6, there is a very small gap (about 0.45 - 0.55 mm) between the pump cover sealing ring 5 and the protruding ring 6; when the impeller 3 rotates, a shearing force like scissors will be generated at the notches of the pump cover sealing ring 5, cutting the impurities (such as fibers) accumulated at the pump cover sealing ring 5, forming a scissor effect at the gap between the impeller 3 and the pump cover sealing ring 5, and cutting or crushing the impurities wound on the impeller 3.

[0028] The impeller 3 has a plurality of blades evenly distributed in the circumferential direction. The front of the blades is open, presenting a semi-open structure; the front edge of the blades contacts the wear-resistant plate 2, and a flow channel is formed between the blades and the wear-resistant plate 2. Although the front of the blades is open, the front edge thereof can contact the back of the wear-resistant plate 2. When the impeller 3 rotates, the gap between the wear-resistant plate 2 and the impeller 3 is very small, and the wear-resistant plate notches 8 on the back of the wear-resistant plate 2 will also generate a shearing force like scissors, cutting the impurities (such as fibers) accumulated on the impeller 3, forming a scissor effect at the gap between the impeller 3 and the wear-resistant plate 2, and cutting or crushing the impurities wound on the impeller 3.

[0029] The outer edges of the protruding ring notches 7, the wear-resistant plate notches 8, and the sealing ring notches 9 all adopt an acute angle structure without rounding and polishing to ensure the crushing effect. 3 - 4 protruding ring notches 7, wear-resistant plate notches 8, and sealing ring notches 9 can be cut out on the circumferences of the corresponding components.

[0030] When the impeller 3 rotates, the present utility model forms a scissor effect at the gap between the wear-resistant plate 2 and the impeller 3 and at the gap between the impeller 3 and the pump cover seal ring 5, so as to cut or break the impurities wound in front of and behind the impeller 3, and avoid the parking failure of the impeller 3 due to impurity winding.

[0031] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: modifying the technical solutions recorded in the foregoing embodiments, or equivalently replacing some or all of the technical features therein, does not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A sewage pump with a crushing function, characterized in that, Comprising: A pump body (1), a wear-resistant plate (2), an impeller (3), a pump cover (4) and a pump cover sealing ring (5); The pump body (1) and the pump cover (4) are fixedly connected; there is a cavity between the pump body (1) and the pump cover (4); The pump body (1) is fixedly connected to the wear-resistant plate (2); a plurality of wear-resistant plate notches (8) are provided at the back of the wear-resistant plate (2); The wear-resistant plate (2) and the impeller (3) are placed in the cavity; a protruding ring (6) is integrally provided at the back of the impeller (3); a plurality of protruding ring notches (7) are provided on the protruding ring (6); The pump cover (4) is provided with a pump cover sealing ring (5), and a plurality of sealing ring notches (9) are provided on the pump cover sealing ring (a); The pump cover sealing ring (5) is arranged corresponding to the protruding ring (6).

2. The sewage pump with a crushing function according to claim 1, wherein The impeller (3) has a plurality of blades evenly distributed in the circumferential direction, and the front of the blades is open; The front edge of the blade contacts the wear-resistant plate (2), and a flow channel is formed between the blade and the wear-resistant plate (2).

3. The sewage pump with a crushing function according to claim 2, characterized in that, The impeller (3) is sleeved on the pump shaft.

4. The sewage pump with a crushing function according to claim 1, characterized in that, The outer edges of the protruding ring notches (7), the wear-resistant plate notches (8) and the sealing ring notches (9) all adopt an acute angle structure.

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