A cutting assembly for a water pump

Abstract

The utility model belongs to the technical field of water pump, especially point to a kind of cutting assembly of water pump, including cutting cutterhead, the rotating main shaft of water pump is provided with cutting moving knife, the outer wall surface of cutting cutterhead is uniformly distributed with plane cutting through orifice, plane cutting auxiliary groove around, cutting moving knife has the plane cutting tough of cooperation with plane cutting through orifice and plane cutting auxiliary groove, the hole wall of central hole is uniformly distributed with several axial cutting through grooves around, cutting moving knife has the axial portion of being penetrated in central hole, axial portion is provided with the axial cutting tough of cooperation with axial cutting through groove. The utility model is formed on the basis of plane cutting through orifice and plane cutting tough, not only further strengthen plane cutting ability by the cooperation of plane cutting auxiliary groove and plane cutting tough, simultaneously, axial cutting is formed between axial cutting through groove and axial cutting tough, so as to be able to cut sundries in circumferential and axial cutting, to ensure that fiber sundries can be completely cut off.

Description

Technical fields:

[0001] This utility model belongs to the field of water pump technology, and specifically refers to a cutting component for a water pump. Background technology:

[0002] Submersible pumps or sewage pumps used in municipal sewage discharge, wastewater treatment, agricultural irrigation, and construction often operate in environments containing various solid debris. This debris includes not only hard particles but also a large amount of flexible, slender fibrous materials such as strips of cloth, ropes, hair, plastic film fragments, and plant roots. To prevent this debris from entering the pump body and damaging the impeller, clogging the flow channel, or entangled in the main shaft, a cutting device is usually installed at the pump inlet. Existing pump cutting devices mostly employ a structure where a rotating blade and a cutting disc work together. The rotating blade is driven by the pump's rotating main shaft, cutting and pulverizing the debris at the inlet, allowing it to pass smoothly through the pump body without causing blockage.

[0003] However, the cutting capacity between the cutting disc and the rotating blade is generally insufficient, mainly manifested in the inability to cut fibrous debris, resulting in a large amount of debris getting tangled and clogging the water pump inlet. When the debris accumulates to a certain extent, the motor will stall and burn out. Summary of the Invention:

[0004] The purpose of this invention is to provide a cutting component for a water pump. Based on the planar cutting formed between the planar cutting through-hole and the planar cutting head, it not only further enhances the planar cutting capability by cooperating with the planar cutting auxiliary groove and the planar cutting head, but also forms an axial cutting between the axial cutting through-hole and the axial cutting head, thereby enabling the cutting of debris in both the circumferential and axial directions to ensure that fibrous debris can be completely cut off.

[0005] This utility model is implemented as follows:

[0006] A cutting assembly for a water pump includes a cutting disc fixed at the water inlet of the water pump. The rotating main axis of the water pump passes outward through the central hole of the cutting disc and is provided with a cutting blade. The outer wall surface of the cutting disc has a plurality of planar cutting openings and a plurality of planar cutting auxiliary grooves evenly distributed circumferentially. When rotating, the cutting blade can completely cover the planar cutting openings and planar cutting auxiliary grooves, and the cutting blade has a planar cutting edge that cooperates with the planar cutting openings and planar cutting auxiliary grooves. The wall of the central hole has a plurality of axial cutting grooves evenly distributed circumferentially. The cutting blade has an axial portion that passes through the central hole, and the axial portion is provided with an axial cutting edge that cooperates with the axial cutting grooves.

[0007] In the aforementioned water pump cutting assembly, the planar cutting auxiliary groove includes an outer ring planar cutting auxiliary groove located on the outer ring side of the planar cutting opening, and an inner ring planar cutting auxiliary groove located on the inner ring side of the planar cutting opening. The number of outer ring planar cutting auxiliary grooves is greater than or equal to the number of planar cutting openings.

[0008] In the aforementioned water pump cutting assembly, the inner annular planar cutting auxiliary groove is a planar open groove with its opening connected to the central hole, and the axial cutting through groove and the inner annular planar cutting auxiliary groove are circumferentially staggered.

[0009] In the aforementioned water pump cutting assembly, the cutting blade includes a cutting blade cylinder mounted on a rotating main shaft. A blade head is provided on the outer end wall of the cutting blade cylinder. The forward rotation side of the blade head is a planar cutting groove that can form a cutting fit with the outer annular planar cutting auxiliary groove and the planar cutting through-hole. A certain fitting clearance exists between the reverse rotation side of the blade head and the cutting disc. The inner end face of the cutting blade cylinder covers the inner annular planar cutting auxiliary groove and the axial cutting through-hole. A cutting opening groove is provided on the inner end face of the cutting blade cylinder to allow external fibrous debris to enter the inner annular planar cutting auxiliary groove or the axial cutting through-hole. The forward rotation side of this cutting opening groove is a planar cutting groove that can form a cutting fit with the inner annular planar cutting auxiliary groove. The axial portion extends inward from the inner end face of the cutting blade cylinder.

[0010] In the aforementioned water pump cutting assembly, the outer end face of the moving cutter shaft cylinder is provided with a countersunk groove along its axis, and the head end of the mounting screw is located in the countersunk groove, while the tail end is screwed onto the rotating spindle.

[0011] The outstanding advantages of this utility model compared to the prior art are:

[0012] Based on the planar cutting formed between the planar cutting through and the planar cutting tool, this utility model not only further enhances the planar cutting capability by cooperating with the planar cutting auxiliary groove and the planar cutting tool, but also forms an axial cutting between the axial cutting through and the axial cutting tool, thereby enabling the cutting of debris in both the circumferential and axial directions to ensure that fibrous debris can be completely cut off. Attached image description:

[0013] Figure 1 This is a perspective view of the cutting blade disc of this utility model;

[0014] Figure 2 This utility model is a three-dimensional cutting moving blade. Figure 1 ;

[0015] Figure 3 This utility model is a three-dimensional cutting moving blade. Figure 2 ;

[0016] Figure 4 This is a cross-sectional view of the cutting component of this utility model in conjunction with the water pump.

[0017] In the diagram: 1. Water pump; 2. Cutting disc; 3. Rotary spindle; 4. Center hole; 5. Moving cutting tool; 6. Planar cutting through; 7. Axial cutting through groove; 8. Axial part; 9. Axial cutting groove; 10. Outer ring plane cutting auxiliary groove; 11. Inner ring plane cutting auxiliary groove; 12. Moving tool shaft cylinder; 13. Tool head; 14. Cutting opening groove; 15. Countersunk groove hole. Detailed implementation method:

[0018] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —4:

[0019] A cutting assembly for a water pump includes a cutting disc 2 fixed at the inlet port of a water pump 1. The rotating spindle 3 of the water pump 1 extends outward through the central hole 4 of the cutting disc 2 and is provided with a cutting blade 5. The outer wall surface of the cutting disc 2 is circumferentially distributed with a plurality of planar cutting openings 6 and a plurality of planar cutting auxiliary grooves. When rotating, the cutting blade 5 can completely cover the planar cutting openings 6 and the planar cutting auxiliary grooves. The cutting blade 5 has a planar cutting edge that cooperates with the planar cutting openings 6 and the planar cutting auxiliary grooves. The wall of the central hole 4 is circumferentially distributed with a plurality of axial cutting grooves 7. The cutting blade 5 has an axial portion 8 that extends through the central hole 4. The axial portion 8 is provided with an axial cutting edge 9 that cooperates with the axial cutting grooves 7.

[0020] Based on the planar cutting formed between the planar cutting through 6 and the planar cutting tool, this utility model not only further enhances the planar cutting capability by cooperating with the planar cutting auxiliary groove and the planar cutting tool, but also forms an axial cutting between the axial cutting through 7 and the axial cutting tool 9, thereby enabling the cutting of debris in both the circumferential and axial directions to ensure that fibrous debris can be completely cut off.

[0021] In order to enhance the planar cutting capability, in this embodiment, the planar cutting auxiliary groove includes an outer ring planar cutting auxiliary groove 10 located on the outer ring side of the planar cutting opening 6 and an inner ring planar cutting auxiliary groove 11 located on the inner ring side of the planar cutting opening 6. Furthermore, depending on the actual circumferential area, the number of outer ring planar cutting auxiliary grooves 10 is greater than or equal to the number of planar cutting openings 6.

[0022] Meanwhile, in order to enable the fibrous debris to be quickly cut and crushed in both the axial and circumferential directions, the inner ring plane cutting auxiliary groove 11 is a planar opening groove with its opening connected to the central hole 4, and the axial cutting through groove 7 and the inner ring plane cutting auxiliary groove 11 are circumferentially staggered.

[0023] Furthermore, the specific structure of the cutting blade 5 is as follows: The cutting blade 5 includes a blade shaft cylinder 12 mounted on the rotating spindle 3. The outer end wall of the blade shaft cylinder 12 is provided with a blade head 13. The forward rotation side of the blade head 13 is a planar cutting tool that can form a cutting fit with the outer ring planar cutting auxiliary groove 10 and the planar cutting through 6. There is a certain fitting gap between the reverse rotation side of the blade head 13 and the cutting disc 2. The inner end face of the blade shaft cylinder 12 covers the inner ring planar cutting auxiliary groove 11 and the axial cutting through 7. The inner end face of the blade shaft cylinder 12 is provided with a cutting opening groove 14 for external fiber debris to enter into the inner ring planar cutting auxiliary groove 11 or the axial cutting through 7. The forward rotation side of the cutting opening groove 14 is a planar cutting tool that can form a cutting fit with the inner ring planar cutting auxiliary groove 11. The axial part 8 extends inward from the inner end face of the blade shaft cylinder 12. That is, the cutter head 13 can form a planar cutting fit with the outer ring planar cutting auxiliary groove 10 and the planar cutting through 6, while the cutting opening groove 14 and the inner ring planar cutting auxiliary groove 11 form a planar cutting fit, and the axial cutting through groove 7 and the axial cutting groove 9 form an axial cutting fit.

[0024] In addition, in order to reduce the impact of external debris on the connection between the cutting blade 5 and the rotating spindle 3 of the water pump 1, the outer end face of the cutting blade cylinder 12 is provided with a countersunk groove 15 along its axis, and the head end of the mounting screw is located in the countersunk groove 15, and the tail end is screwed onto the rotating spindle 3.

[0025] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A cutting assembly for a water pump, comprising a cutting disc (2) fixed at the water inlet of a water pump (1), wherein a rotating spindle (3) of the water pump (1) extends outward through the central hole (4) of the cutting disc (2) and is provided with a cutting moving blade (5), characterized in that: The outer wall of the cutting disc (2) is circumferentially distributed with a number of planar cutting openings (6) and a number of planar cutting auxiliary grooves. When rotating, the cutting blade (5) can completely cover the planar cutting openings (6) and the planar cutting auxiliary grooves. The cutting blade (5) has a planar cutting tool that cooperates with the planar cutting openings (6) and the planar cutting auxiliary grooves. The wall of the central hole (4) is circumferentially distributed with a number of axial cutting grooves (7). The cutting blade (5) has an axial part (8) that penetrates the central hole (4). The axial part (8) is provided with an axial cutting tool (9) that cooperates with the axial cutting grooves (7).

2. The cutting assembly of a water pump according to claim 1, characterized in that: The planar cutting auxiliary groove includes an outer ring planar cutting auxiliary groove (10) located on the outer ring side of the planar cutting opening (6) and an inner ring planar cutting auxiliary groove (11) located on the inner ring side of the planar cutting opening (6). The number of outer ring planar cutting auxiliary grooves (10) is greater than or equal to the number of planar cutting openings (6).

3. The cutting assembly of a water pump according to claim 2, characterized in that: The inner ring plane cutting auxiliary groove (11) is a plane opening groove with its opening connected to the central hole (4). The axial cutting through groove (7) and the inner ring plane cutting auxiliary groove (11) are circumferentially staggered.

4. A cutting assembly for a water pump according to claim 2 or 3, characterized in that: The cutting blade (5) includes a cutting blade cylinder (12) mounted on a rotating spindle (3). The outer end wall of the cutting blade cylinder (12) is provided with a blade head (13). The forward rotation side of the blade head (13) is a planar cutting groove that can form a cutting fit with the outer ring plane cutting auxiliary groove (10) and the planar cutting through (6). There is a certain fitting clearance between the reverse rotation side of the blade head (13) and the cutting blade disc (2). The inner end face of the cutting blade cylinder (12) The inner ring plane cutting auxiliary groove (11) and the axial cutting through groove (7) are covered. The inner end face of the moving cutter shaft cylinder (12) is provided with a cutting opening groove (14) for external fiber debris to enter the inner ring plane cutting auxiliary groove (11) or the axial cutting through groove (7). The positive rotation side of the cutting opening groove (14) is a plane cutter that can form a cutting fit with the inner ring plane cutting auxiliary groove (11). The axial part (8) extends inward from the inner end face of the moving cutter shaft cylinder (12).

5. The cutting assembly of a water pump according to claim 4, characterized in that: The outer end face of the moving cutter shaft cylinder (12) is provided with a countersunk groove (15) along its axis. The head end of the mounting screw is located in the countersunk groove (15), and the tail end is screwed onto the rotating spindle (3).

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