Impeller assembly of a guided sewage pump

Abstract

The present invention discloses an impeller assembly of a guided sewage pump, which has a cutting function and adopts a closed and open combined structure as a whole, has the advantages of being leak-proof and highly efficient. The key points of the technical solution are that the impeller comprises an upper cover plate, a lower cover plate and a plurality of main blades connected between the upper cover plate and the lower cover plate, a shaft sleeve is arranged at the center of the upper cover plate, an impeller mouth ring is arranged at the center of the lower cover plate, the main blade comprises an inner end and an outer end, and a cutting knife is arranged at the inner end of the main blade. The present invention is applicable to the technical field of sewage pumps.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage pumps, and in particular relates to an impeller assembly of a guided sewage pump. Background Art

[0002] The impeller is the main component of the sewage pump and is installed on the pump shaft of the sewage pump. The existing impeller structures mainly include the following: Closed impeller: It is composed of blades and front and rear cover plates. It is suitable for conveying clean liquids with low viscosity and no particles, such as clear water and solutions;

[0003] The front semi-open impeller is composed of a rear cover plate and blades, and the rear semi-open impeller is composed of a front cover plate and blades. It is suitable for conveying clean water and liquids similar to clean water, but the efficiency of these two structures of impellers is low;

[0004] Open impeller, which has only blades and blade reinforcement ribs but no front and rear covers, is used to transport liquids with higher viscosity and slurry liquids, but has low efficiency;

[0005] Therefore, the existing impeller structure is difficult to achieve the state of being able to be used for conveying sewage and ensuring high efficiency, and more importantly, when conveying sewage, the dirt in the sewage is very easy to entangle and block the impeller. Summary of the invention

[0006] The object of the present invention is to provide an impeller assembly of a guided sewage pump, which has a cutting function and adopts a closed and open combined structure as a whole, and has the advantages of being leak-proof and highly efficient.

[0007] The object of the present invention is achieved in this way: an impeller assembly of a guided sewage pump includes an impeller, characterized in that it includes an upper cover plate, a lower cover plate and a plurality of main blades connected between the upper cover plate and the lower cover plate, a shaft sleeve is provided at the center of the upper cover plate, an impeller mouth ring is provided at the center of the lower cover plate, the main blade includes an inner end and an outer end, and a cutting knife is provided at the inner end of the main blade.

[0008] The present invention is further configured as follows: the width of the cutting knife is smaller than the width of the main blade, the inner end of the main blade forms a side cutting edge, and the side cutting edge is axially aligned with the inner wall of the impeller ring.

[0009] The present invention is further configured as follows: a plurality of lower blades are provided on the lower surface of the lower cover plate.

[0010] The present invention is further configured as follows: the upper cover plate is also provided with a reinforcement ring connected to the shaft sleeve.

[0011] The present invention is further configured as follows: the number of the main blades is three, and the number of the cutting knives is also three.

[0012] The present invention is further configured as follows: the upper cover plate, the lower cover plate, the main blades and the lower blades are all made of stainless steel.

[0013] The present invention is further configured to include a pump bottom cover, wherein a water hole is provided at the center of the pump bottom cover, and a guide block disposed in the impeller mouth ring is provided on the upper end of the water hole.

[0014] The present invention is further configured as follows: the pump bottom cover is also provided with a mouth ring groove arranged around the water through hole and adapted to the impeller mouth ring, and the inner wall of the water through hole is provided with a sand leakage port connected to the mouth ring groove.

[0015] The present invention is further configured as follows: a convex ring is provided on the outer peripheral edge of the upper surface of the pump bottom cover, and an inclined flow guide surface is provided on the inner wall of the convex ring.

[0016] The above technical solution has the following advantages: the impeller adopts a combination of closed and open impellers, taking advantage of each other to make up for its disadvantages, so that it can achieve the advantages of leakage prevention of the open impeller and the advantages of high efficiency of the closed impeller, thereby improving the efficiency of the whole machine, and a cutting knife is arranged in the impeller, so that it can cut off the dirt;

[0017] By using it in conjunction with the pump bottom cover, the guide block and the cutting knife can cooperate in cutting and guiding, and can play a better role in preventing leakage, further improving the efficiency of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the guided sewage pump of the present invention;

[0019] Figure 2 It is a schematic diagram of the upper cover plate side structure of the impeller in the present invention;

[0020] Figure 3 It is a schematic diagram of the lower cover plate side structure of the impeller in the present invention;

[0021] Figure 4 The present invention Figure 1 A schematic diagram of the enlarged structure of the middle impeller;

[0022] Figure 5 It is a schematic diagram of the structure of the pump bottom cover in the present invention;

[0023] The reference numerals in the figure are: 1, upper cover plate; 2, lower cover plate; 3, main blades; 4, shaft sleeve; 5, impeller mouth ring; 6, cutting knife; 7, cutting edge; 8, lower blade; 10, reinforcement ring; 11, water hole; 12, guide block; 13, mouth ring groove; 14, sand leakage port; 15, convex ring; 16, guide surface; 100, impeller; 200, pump bottom cover. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1-5 :

[0025] An impeller assembly of a guided sewage pump includes an impeller 100, characterized in that it includes an upper cover plate 1, a lower cover plate 2 and a plurality of main blades 3 connected between the upper cover plate 1 and the lower cover plate 2, a shaft sleeve 4 is provided at the center of the upper cover plate 1, an impeller mouth ring 5 is provided at the center of the lower cover plate 2, the main blade 3 includes an inner end and an outer end, and a cutting knife 6 is provided at the inner end of the main blade 3.

[0026] The impeller body adopts a closed structure to increase the impeller head. The shaft sleeve 4 is used to connect with the pump shaft. The cutting knife 6 is directly opposite to the impeller mouth ring 5. When dirt enters from the impeller mouth ring 5, the cutting knife 6 cuts the dirt, allowing the dirt to smoothly enter the impeller flow channel to prevent blockage.

[0027] The width d of the cutting knife 6 is smaller than the width D of the main blade 3 . The inner end of the main blade 3 forms a side cutting edge 7 , and the side cutting edge 7 is axially aligned with the inner wall of the impeller ring 5 .

[0028] Through the above structure, the inner end of the main blade 3 can also play a cutting role, thereby improving the cutting ability.

[0029] The lower surface of the lower cover plate 2 is provided with a plurality of lower blades 8. The lower blades 8 generate outward centrifugal water flow when rotating, which can avoid leakage at the lower end of the impeller and improve the head of the water pump.

[0030] The upper cover plate 1 is also provided with a reinforcement ring 10 connected to the shaft sleeve 4. The reinforcement ring 10 is used to improve the connection strength between the shaft sleeve 4 and the upper cover plate 1. The three can be fixed by welding.

[0031] The number of the main blades 3 is three, and the number of the cutting knives 6 is also three, which are the most preferred numbers.

[0032] The upper cover plate 1, the lower cover plate 2, the main blade 3 and the lower blade 8 are all made of stainless steel and can be fixed by welding, which has low manufacturing cost and is not easy to rust.

[0033] It also includes a pump bottom cover 200, which can be used in conjunction with the impeller. A water hole 11 is provided in the center of the pump bottom cover, and a guide block 12 placed in the impeller mouth ring 5 is provided on the upper end of the water hole 11. An inclined guide surface is provided on one side of the guide block 12, and the other side and the top surface of the guide block 12 are cutting surfaces. When it rotates, the two cutting surfaces are tangent to the cutting knife 6 and the cutting edge 7 respectively, thereby generating shear force on the dirt and improving the cutting effect; the guide surface plays a role in quickly guiding the sewage and dirt, allowing them to quickly enter the impeller.

[0034] The pump bottom cover is also provided with a mouth ring groove 13 which is arranged around the water hole 11 and is adapted to the impeller mouth ring 5. The mouth ring groove 13 is used to be installed and matched with the impeller mouth ring 5, and plays a role in preventing leakage between the impeller mouth ring 5 and the water hole 11, thereby improving the head and efficiency of the pump. A sand leakage port 14 which is connected to the mouth ring groove 13 is provided on the inner wall of the water hole 11. The opening volume of the sand leakage port 14 is relatively small, which can facilitate the downward discharge of mud and sand impurities in the pump head without affecting leakage, thereby avoiding sand jamming.

[0035] A convex ring 15 is also provided on the outer peripheral edge of the upper surface of the pump bottom cover, and an inclined guide surface 16 is provided on the inner wall of the convex ring 15. The pump bottom cover is installed at the bottom of the pump head, and the convex ring 15 is used to engage with the pump head to increase stability; when the impeller rotates, an outward centrifugal water flow can be formed on the upper surface of the pump bottom cover, and the sewage and dirt remaining on the upper surface of the pump bottom cover are transported to the pump head through the guide surface 16.

[0036] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An impeller assembly of a guided sewage pump, comprising an impeller, characterized in that: The invention comprises an upper cover plate (1), a lower cover plate (2) and a plurality of main blades (3) connected between the upper cover plate (1) and the lower cover plate (2); a shaft sleeve (4) is provided at the center of the upper cover plate (1); an impeller ring (5) is provided at the center of the lower cover plate (2); the main blade (3) comprises an inner end and an outer end; and a cutting knife (6) is provided at the inner end of the main blade (3); The width of the cutting blade (6) is smaller than the width of the main blade (3), the inner end of the main blade forms a side cutting edge (7), and the side cutting edge (7) is axially aligned with the inner wall of the impeller ring (5); A plurality of lower blades (8) are provided on the lower surface of the lower cover plate (2); It also includes a pump bottom cover, wherein a water hole (11) is provided at the center of the pump bottom cover, and a guide block (12) disposed in an impeller mouth ring (5) is provided on an upper end of the water hole (11); The pump bottom cover is also provided with a mouth ring groove (13) arranged around the water hole (11) and adapted to the impeller mouth ring (5); the inner wall of the water hole (11) is provided with a sand leakage port (14) communicating with the mouth ring groove (13); A convex ring (15) is also provided on the outer peripheral edge of the upper surface of the pump bottom cover, and an inclined flow guide surface (16) is provided on the inner wall of the convex ring (15).

2. The impeller assembly of a guided sewage pump according to claim 1, characterized in that: The upper cover plate (1) is also provided with a reinforcement ring (10) connected to the shaft sleeve (4).

3. The impeller assembly of a guided sewage pump according to claim 1, characterized in that: The number of the main blades (3) is three, and the number of the cutting knives (6) is also three.

4. The impeller assembly of a guided sewage pump according to claim 2, characterized in that: The upper cover plate (1), the lower cover plate (2), the main blades (3) and the lower blades (8) are all made of stainless steel.

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