Cutting sewage pump

Abstract

The utility model discloses a cutting sewage pump, which relates to the technical field of sewage pumps and comprises a pump body, the bottom surface of the pump body is provided with a feed inlet, a plurality of connecting plates are fixedly connected in the feed inlet, and the top surface of each connecting plate is fixedly connected with a friction block; a cutting wheel structure is rotatably arranged in an inner cavity of the pump body, by arranging the cutting wheel structure, stirring blades of the cutting wheel structure can stir sludge, and when the stirring blades make contact with mud blocks formed in the sludge, the mud blocks are collided to be smashed; when the two stirring blades rotate, the cutting plate in the middle rotates under the action of centrifugal force, and the sharp linear end on one side of the cutting plate can cut up sludge blocks so that the sludge can be uniformly formed; when the rotating speed of the stirring blades is reduced, the negative pressure in the pump body is reduced, the cutting plates rotate downwards under the action of gravity to increase gaps between the cutting plates and the stirring blades, and the sludge discharge efficiency is prevented from being affected by the low-rotating-speed cutting plates of the sewage pump.

Description

Technical Field

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

[0002] At present, the cutting pump belongs to a kind of sewage pump. Compared with the conventional pump, a group of impellers with cutting edges are installed inside the cutting pump in terms of structure. The cutting effect is achieved by the impeller rotating at high speed, and it can easily shred sundries such as fibers, feces, and branches.

[0003] In the prior art, for example, a cutting sewage pump with the publication number of CN213870303U, which relates to the technical field of pumps, includes a pump body, a motor arranged on the pump body, and an impeller coaxially connected to the output shaft of the motor. A cutting column is coaxially connected to one end of the output shaft of the motor passing through the impeller. A plurality of cutting blades are arranged on the cutting column. A cutting ring close to the cutting blades is threadedly connected to one end of the pump body away from the motor, and a plurality of cutting strips close to the cutting blades are arranged inside the cutting ring.

[0004] Reinforcing pieces are fixedly arranged between the cutting blades of this sewage pump. When the rotation speed of the sewage pump is relatively low, the fixedly arranged reinforcing pieces will reduce the passing area of the material, thereby affecting the transportation efficiency at low rotation speeds. At the same time, the inlet of the sewage pump will be placed in materials such as sludge. For example, materials such as sludge will solidify into blocks during the static process, affecting the transportation efficiency. The inlet of this sewage pump cannot avoid the situation of material solidification. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems in the above background art that the fixedly arranged reinforcing pieces reduce the passing area of the material and affect the transportation efficiency, and the material condensation into blocks at the inlet cannot be avoided, and a cutting sewage pump is proposed.

[0006] The purpose of the utility model can be achieved by the following technical solutions:

[0007] A cutting sewage pump includes a pump body. A feeding port is arranged on the bottom surface of the pump body. A plurality of connecting plates are fixedly connected inside the feeding port, and a friction block is fixedly connected to the top surface of each connecting plate. A cutting wheel structure is rotatably arranged in the inner cavity of the pump body. The cutting wheel structure includes:

[0008] A mounting shaft, which is rotatably connected in the inner cavity of the pump body, and a plurality of stirring blades are arranged on the surface of the mounting shaft;

[0009] A cutting plate, which is arranged between adjacent stirring blades. Rotating shafts are arranged on both sides of the cutting plate, and the rotating shafts are rotatably connected to the adjacent stirring blades;

[0010] Elastic blocks, which are fixedly arranged on the bottom surface of each stirring blade.

[0011] As a further solution of the present utility model: The friction block and the elastic block are triangular in shape, and the inclined surfaces of the friction block and the elastic block can be in contact and fit with each other.

[0012] As a further solution of the present utility model: A connecting cavity is provided between the pump body and the feed inlet, and an impeller is rotatably arranged in the connecting cavity. The impeller is fixedly connected to the mounting shaft.

[0013] As a further solution of the present utility model: A motor is arranged in the pump body, and the output end of the motor is fixedly connected to the steering shaft of the impeller.

[0014] As a further solution of the present utility model: A discharge port is arranged on the surface of the pump body, and the discharge port is located above the impeller.

[0015] As a further solution of the present utility model: The cutting plate is triangular in shape.

[0016] The beneficial effects of the present utility model:

[0017] (1) For a cutting sewage pump of the present utility model, by providing a cutting wheel structure, the stirring blades of the cutting wheel structure can stir the sludge, and when contacting the formed mud blocks in the sludge, impact them to make them crushed; when the two stirring blades rotate, the cutting plate in the middle rotates under the action of centrifugal force, and the sharp straight end on one side of the cutting plate can cut the mud blocks to make the sludge evenly formed; when the rotation speed of the stirring blades decreases, the negative pressure inside the pump body decreases, and the cutting plate rotates downward under the action of gravity to increase the gap with the stirring blades, avoiding the influence of the low-speed cutting plate of the sewage pump on the discharge efficiency of the sludge.

[0018] (2) For a cutting sewage pump of the present utility model, by providing a feed inlet, a friction block is arranged on the top surface of the connecting plate in the feed inlet. An elastic block is arranged on the bottom surface of the stirring blade. During the rotation of the stirring blade, the elastic block will continuously contact the friction block and generate a force on it. The friction block drives the bottom of the feed inlet to vibrate through the connecting plate, thereby vibrating the sludge accumulated near the feed inlet to prevent it from solidifying due to long-term static state and affecting the subsequent discharge efficiency of the sludge. Description of the Drawings

[0019] The present utility model will be further described below with reference to the drawings.

[0020] Figure 1 It is a schematic diagram of the internal structure of a cutting sewage pump of the present utility model;

[0021] Figure 2 It is a schematic cross-sectional structure diagram of the feed inlet structure of the present utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the cutting wheel structure of the present utility model.

[0023] In the figure: 1. Pump body; 2. Feeding port; 21. Connecting ring; 22. Connecting plate; 23. Friction block; 3. Discharge port; 4. Motor; 5. Connecting cavity; 6. Impeller; 7. Cutting wheel structure; 71. Mounting shaft; 72. Stirring blade; 73. Cutting plate; 74. Rotating shaft; 75. Elastic block. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-3 As shown in the figure, the present invention is a cutting sewage pump, including a pump body 1. An inner cavity is provided in the pump body 1. A connecting cavity 5 is fixedly connected below the pump body 1, and a feeding port 2 is fixedly connected to the bottom surface of the connecting cavity 5. An inner cavity is opened on the bottom surface of the feeding port 2, and the inner cavity of the feeding port 2 communicates with the inner cavities of the impeller 6 and the pump body 1. A connecting ring 21 is provided at the center of the bottom of the feeding port 2. A connecting plate 22 is fixedly connected around the connecting ring 21, and the other end of the connecting plate 22 is fixedly connected to the inner wall of the feeding port 2. The connecting ring 21 is fixedly arranged at the center of the bottom surface of the feeding port 2 through the connecting plate 22. The connecting plates 22 are arranged in an equidistant circumferential array around the connecting ring 21, and a friction block 23 is provided on the top surface of each connecting ring 21. The shape of the friction block 23 is triangular. An inner cavity of the pump body 1 is fixedly provided with a motor 4, and the output end of the motor 4 is arranged vertically downward. A discharge port 3 is fixedly connected to the side of the pump body 1. The discharge port 3 is located above the connecting cavity 5, and the discharge port 3 communicates with the inner cavity of the pump body 1. An impeller 6 is arranged below the motor 4, and the impeller 6 is arranged horizontally. The impeller 6 is rotatably connected in the connecting cavity 5. The output end of the motor 4 extends downward, and the output end of the motor 4 is coaxially and fixedly connected to the steering shaft of the impeller 6.

[0026] A fixed shaft is fixedly connected to the bottom of the impeller 6, and the fixed shaft and the center of rotation of the impeller 6 are located on the same vertical line. The bottom of the fixed shaft is fixedly connected to a cutting wheel structure 7, and the mounting shaft 71 of the cutting wheel structure 7 is coaxially and fixedly connected to the fixed shaft. A plurality of stirring blades 72 are fixedly arranged on the circumference of the mounting shaft 71, and the plurality of stirring blades 72 are arranged in an equidistant circular array about the center of the mounting shaft 71. A gap is left between the bottom surface of the stirring blade 72 and the top surfaces of the connecting ring 21 and the connecting plate 22 of the lower feed inlet 2. An elastic block 75 is fixedly connected to the bottom surface of each stirring blade 72. The elastic block 75 is triangular in shape, and the triangular inclined surface of the elastic block 75 can contact the inclined surface of the lower friction block 23. A cutting plate 73 is arranged between adjacent stirring blades 72. The cutting plate 73 is triangular in shape, and the outermost end of the cutting plate 73 is a sharp straight end. Both sides of the inner end of each cutting plate 73 are fixedly connected to a rotating shaft 74, and both ends of the rotating shaft 74 are rotatably connected to two adjacent stirring blades 72, so that the cutting plate 73 rotates between the two stirring blades 72 in the vertical plane through the rotating shaft 74. One cutting plate 73 is arranged between adjacent stirring blades 72, and a plurality of cutting plates 73 are located on the same horizontal plane.

[0027] When using this cutting sewage pump, the motor 4 inside the pump body 1 is started, and the output end of the motor 4 drives the impeller 6 in the connection cavity 5 to rotate, so as to generate negative pressure between the connection cavity 5 and the inside of the housing. The sludge below the feed inlet 2 is subjected to the negative pressure force and enters the pump body 1. The sludge first enters the feed inlet 2 and enters the inner cavity from the gap between the connecting plate 22 and the connecting ring 21 and the feed inlet 2. The output end of the motor 4 drives the impeller 6 and the mounting shaft 71 to rotate through the fixed shaft, and drives the stirring blades 72 on the surface of the mounting shaft 71 to stir the sludge. Thereby, the agglomerated mud blocks inside the sludge are crushed, and the sludge is uniformly formed to prevent blockage inside the sewage pump. During the rotation of the stirring blade 72, as the rotation speed of the mounting shaft 71 increases, the cutting plate 73 between adjacent stirring blades 72 gradually rotates upward under the action of centrifugal force. The sharp straight end on one side of the cutting plate 73 cuts the inside of the sludge, and the upwardly rotating cutting plate 73 increases the contact area with the sludge, so that it can contact the mud blocks more effectively. Even when the rotation speed of the fixed shaft decreases, the rotation speed of the upper impeller 6 synchronously decreases, reducing the negative pressure inside the pump body 1. The cutting plate 73 rotates downward under the action of gravity, thereby increasing the gap between the cutting plate 73 and the stirring blade 72, and avoiding too small a gap from affecting the working efficiency of the sewage pump when the negative pressure decreases. During the rotation of the stirring blade 72, the elastic block 75 at the bottom of the stirring blade 72 will continuously contact the friction block 23 on the top surface of the lower connecting plate 22, so as to indirectly provide a force on the friction block 23 and the connecting plate 22, causing the connecting plate 22 and the feed inlet 2 to vibrate under the action of the force, and jittering the sludge near the feed inlet 2 to prevent the sludge from accumulating near the feed inlet 2 and solidifying into blocks.

[0028] Working principle of the present utility model: A cutting sewage pump of the present utility model is provided with a cutting wheel structure 7. The stirring blades 72 of the cutting wheel structure 7 can stir the sludge, and when contacting the formed mud blocks in the sludge, they impact and crush them; when the two stirring blades 72 rotate, the cutting plate 73 in the middle rotates under the action of centrifugal force, and the sharp straight end on one side of the cutting plate 73 can cut the mud blocks to make the sludge uniformly formed; when the rotation speed of the stirring blades 72 decreases, the negative pressure inside the pump body 1 decreases, and the cutting plate 73 rotates downward under the action of gravity to increase the gap with the stirring blades 72, avoiding the influence of the cutting plate 73 at low rotation speed of the sewage pump on the discharge efficiency of the sludge; by providing a feed inlet 2, a friction block 23 is provided on the top surface of the connecting plate 22 inside the feed inlet 2. An elastic block 75 is provided on the bottom surface of the stirring blade 72. During the rotation of the stirring blade 72, the elastic block 75 will continuously contact the friction block 23 and generate a force on it. The friction block 23 drives the bottom of the feed inlet 2 to vibrate through the connecting plate 22, thereby vibrating the sludge accumulated near the feed inlet 2 to prevent it from solidifying due to long-term static state and affecting the subsequent discharge efficiency of the sludge.

[0029] The above has described in detail one embodiment of the present utility model, but the content described is only the preferred embodiment of the present utility model and cannot be considered as used to limit the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of the application of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. A cutting sewage pump, characterized in that: The invention comprises a pump body (1), wherein the bottom surface of the pump body (1) is provided with a feed inlet (2), a plurality of connecting plates (22) are fixedly connected inside the feed inlet (2), and a friction block (23) is fixedly connected to the top surface of each connecting plate (22); a cutting wheel structure (7) is rotatably provided in the inner cavity of the pump body (1), and the cutting wheel structure (7) comprises: A mounting shaft (71) is rotatably connected to the inner cavity of the pump body (1), and a plurality of stirring blades (72) are arranged on the surface of the mounting shaft (71); A cutting plate (73) is arranged between adjacent stirring blades (72), and a rotating shaft (74) is arranged on both sides of the cutting plate (73), and the rotating shaft (74) is rotatably connected to the adjacent stirring blades (72); An elastic block (75) is fixedly arranged on the bottom surface of each stirring blade (72).

2. A cutting sewage pump according to claim 1, characterized in that: The friction block (23) and the elastic block (75) are in a triangular shape, and the inclined surfaces of the friction block (23) and the elastic block (75) can be in contact with each other.

3. A cutting sewage pump according to claim 2, characterized in that: A connecting chamber (5) is provided between the pump body (1) and the feed port (2), an impeller (6) is rotatably provided in the connecting chamber (5), and the impeller (6) is fixedly connected to the mounting shaft (71).

4. A cutting sewage pump according to claim 3, characterized in that: A motor (4) is arranged inside the pump body (1), and an output end of the motor (4) is fixedly connected to a steering shaft of an impeller (6).

5. A cutting sewage pump according to claim 4, characterized in that: A discharge port is provided on the surface of the pump body (1), and the discharge port is located above the impeller (6).

6. A cutting sewage pump according to claim 1, characterized in that: The cutting plate (73) is in the shape of a triangle.

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