Cutting knife group and sewage pump for lifter

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a cutting knife group and a sewage pump for a lifter. The cutting knife tackle comprises a knife disc and a blade, the knife disc is provided with a cutting through hole, the cutting through hole forms a first opening and a second opening in the knife disc, the first opening is larger than the second opening, the blade comprises a mounting seat and a cutting part, and the cutting part is provided with an inclined cutting edge. According to the cutter set, the cutter head is fixed to the inlet end of the sewage pump, the blade is arranged on one side of the second opening of the cutter head and connected with the driving motor of the sewage pump, and a small gap is reserved between the blade and the cutter head. The driving motor of the sewage pump drives the blade to rotate, and the cutting edge of the blade and the notch of the cutterhead form a scissor effect. When sewage enters the sewage pump through the cutting through holes, the blades and the cutter head are matched to bite and cut impurities such as films and rubber plastics in the sewage, a good smashing effect is achieved, and it is guaranteed that the sewage pump cannot be blocked by the impurities such as the films.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a cutting blade assembly and a sewage pump for a lifter. Background Technology

[0002] Domestic sewage from many places flows into underground collection tanks through drainage pipes. The collection tanks are equipped with sewage pumps, connecting pipes, and control mechanisms to form sewage lifting devices (lifters). The sewage pumps lift and pump the sewage out of the collection tanks, allowing the sewage to be incorporated into the urban sewage network and then transported to sewage treatment centers for centralized treatment.

[0003] The inventors of this application have discovered that domestic sewage often contains impurities such as films, rubber, and plastics. When these impurities enter the sewage pump of the lifting device, they can cause blockage of the pump, rendering the lifting device unusable. Utility Model Content

[0004] The purpose of this invention is to provide a sewage pump for a cutting blade assembly and a lifting device to solve the problems mentioned in the background art.

[0005] This utility model embodiment provides a cutting blade assembly, including: a blade disc and blades;

[0006] The cutter head is provided with a through hole and a fixing through hole;

[0007] The cutter head is provided with multiple cutting through holes, which are evenly distributed along the circumferential direction.

[0008] The cutting through hole forms a first opening and a second opening on both sides of the cutter head, respectively. The sidewall of the cutting through hole has an axial slope, such that the first opening is larger than the second opening.

[0009] The blade includes: a mounting base and a cutting section;

[0010] The mounting base is provided with a mounting through hole, and the cutting part is provided on opposite sides of the mounting base. The cutting part is provided with an inclined blade.

[0011] The cutter head is fixedly installed, and the blade is located on one side of the second opening of the cutter head with a gap between it and the cutter head. The mounting base is connected to an external drive mechanism. When the blade rotates, the cutting edge covers the cutting through hole area to cut and crush the passing debris.

[0012] Based on the above solution, the cutting blade assembly of this utility model, by setting a blade disc and blades, has multiple cutting through holes along the circumference of the blade disc. The cutting through holes form a first opening and a second opening on the two end faces of the blade disc, with the first opening being larger than the second opening. The blades include a mounting base and a cutting part, with the cutting part located on both sides of the mounting base and having inclined cutting edges. This cutting blade assembly is applied to the sewage pump of a lift pump. The blade disc is fixed to the inlet end of the sewage pump, and the blades are located on the side of the blade disc near the second opening formed by the cutting through holes. A small gap is left between the blades and the blade disc. The mounting base of the blades is connected to the drive motor of the sewage pump. The drive motor of the sewage pump drives the blades to rotate, and the cutting edges of the blades cover the cutting through hole area of ​​the blade disc, forming a scissor effect with the cutting edge of the blade disc. When sewage enters the sewage pump through the cutting through holes of the blade disc, the blades and the blade disc cooperate to tear and cut the film, rubber, plastic, and other debris in the sewage, achieving a good crushing effect and ensuring that the sewage pump is not blocked by film and other debris.

[0013] In one feasible solution, the cut-through hole is quadrilateral in shape and includes: a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall;

[0014] The first sidewall and the third sidewall are arc-shaped and extend radially, with the length of the first sidewall being greater than the length of the third sidewall.

[0015] In one feasible embodiment, the cutting through hole has a plurality of protruding teeth spaced apart on the first sidewall on one side of the second opening.

[0016] In one feasible solution, the blade's inclination angle is 18±5°.

[0017] In one feasible solution, the cutter head and the blade are made of alloy steel with a hardness of HRC58.

[0018] In one feasible solution, the cutter head has multiple cutting grooves on the end face of the second opening side.

[0019] In one feasible solution, the cutting groove includes: a first cutting groove and a second cutting groove;

[0020] Multiple first cutting grooves are evenly distributed between the through hole and the cutting through hole, and are connected to the through hole;

[0021] Multiple second cutting grooves are evenly distributed on the outside of the cutting through holes, and each second cutting groove is located between two adjacent cutting through holes. When the blade rotates, the cutting edge covers the area of ​​the second cutting groove.

[0022] In one feasible solution, the mounting base is provided with a plurality of third cutting grooves on the end face near the cutter head;

[0023] The third cutting groove corresponds to the position of the first cutting groove.

[0024] This utility model embodiment also provides a sewage pump for a lifter, including: a sewage pump body and a cutting blade assembly as described in any of the above designs;

[0025] The cutter head is located at the inlet end of the sewage pump body, and the blades are connected to the drive motor of the sewage pump body. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the cutting blade assembly in Embodiment 1 of this utility model;

[0028] Figure 2 This is a schematic diagram of the cutter head in Embodiment 1 of this utility model;

[0029] Figure 3 This is a schematic diagram of the cutter head from another angle in Embodiment 1 of this utility model;

[0030] Figure 4 This is a schematic diagram of the blade in Embodiment 1 of this utility model;

[0031] Figure 5 This is a schematic diagram of the blade from another angle in Embodiment 1 of this utility model;

[0032] Figure 6 This is a schematic diagram of the sewage pump for the lift in Embodiment 2 of this utility model.

[0033] Numbering on the map:

[0034] 1. Cutter head; 11. Through hole; 12. Fixing through hole; 13. Cutting through hole; 131. First side wall; 132. Second side wall; 133. Third side wall; 134. Fourth side wall; 14. Protruding tooth; 15. Cutting groove; 151. First cutting groove; 152. Second cutting groove; 2. Blade; 21. Mounting base; 211. Mounting through hole; 212. Third cutting groove; 22. Cutting part; 221. Blade; 100. Sewage pump body. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0039] As described in the background section of this application, a sewage pump, connecting pipelines, and control mechanism are integrated into a collection tank to form a sewage lifting device (lifter). The sewage pump lifts and pumps the sewage out of the collection tank, allowing the sewage to be incorporated into the urban sewage network and then transported to a sewage treatment center for centralized treatment.

[0040] The inventors of this application have discovered that domestic sewage often contains impurities such as films, rubber, and plastics. When these impurities enter the sewage pump of the lifting device, they can cause blockage of the pump, rendering the lifting device unusable.

[0041] To address the aforementioned problems, the inventors of this application have proposed a technical solution, the specific embodiments of which are as follows:

[0042] Example 1

[0043] Figure 1 This is a schematic diagram of the cutting blade assembly in Embodiment 1 of this utility model. Figure 2 This is a schematic diagram of the cutter head in Embodiment 1 of this utility model. Figure 3 This is a schematic diagram of the cutter head from another angle in Embodiment 1 of this utility model. Figure 4 This is a schematic diagram of the blade in Embodiment 1 of this utility model. Figure 5 This is a schematic diagram of the blade in Embodiment 1 of this utility model from another angle.

[0044] like Figures 1 to 5 As shown, the cutting blade assembly of this embodiment includes: a blade disc 1 and a blade 2.

[0045] The cutter head 1 has a through hole 11 at its center and multiple fixing through holes 12 are arranged on the outer circumference of the cutter head 1. The fixing through holes 12 are used for the installation and fixing of the cutter head 1.

[0046] The cutter head 1 is provided with multiple cutting through holes 13, which are evenly distributed along the circumference.

[0047] The cutting through hole 13 forms a first opening and a second opening on the two end faces of the cutter head 1, respectively. The cutting through hole 13 is trumpet-shaped, and its sidewalls have a certain slope in the axial direction, which makes the openings formed by the cutting through hole 13 on the two end faces of the cutter head 1 different in size. This results in the smaller end edge of the cutting through hole 13 forming a sharp cut at the end face of the cutter head 1. For ease of description, the first opening formed by the cutting through hole 13 is defined as larger than the second opening, that is, the second opening is the smaller end of the cutting through hole 13, and the first opening is the larger end of the cutting through hole 13.

[0048] The blade 2 is a one-piece structure, including: a mounting base 21 and a cutting section 22.

[0049] The mounting base 21 has a mounting through hole 211 at its center, and the cutting parts 22 are symmetrically arranged on opposite sides of the mounting base 21. The cutting parts 22 of the blade 2 have blades 221 with an inclined slope.

[0050] The blade 221 of the blade 2 has a radial length greater than the radial length of the cutting through hole 13 of the cutter head 1. When the blade 2 rotates, the blade 221 can cover the area of ​​the cutting through hole 13 of the cutter head 1.

[0051] The cutting component in this embodiment is applied to the sewage pump of the elevator.

[0052] The cutter head is fixedly installed at the inlet of the sewage pump. The blades are positioned on the side of the cutter head near the second opening formed by the cutting through-hole. A slight gap is left between the end face of the blade and the end face of the cutter head, and the cutting edge of the blade is positioned adjacent to the end face of the cutter head. The blade mounting base is connected to the drive mechanism of the sewage pump. The drive mechanism of the sewage pump drives the blade to rotate. When the blade rotates, the cutting edge of the blade covers the cutting through-hole area of ​​the cutter head, and the cutting edge of the blade and the cut of the cutter head form a scissor effect. When sewage enters the sewage pump through the cutting through-hole of the cutter head, the blades and the cutter head work together to tear and cut away film, rubber, plastic and other debris in the sewage, achieving a good pulverizing effect.

[0053] As can be seen from the above, the cutting blade assembly of this embodiment, by setting a blade disc and blades, has multiple cutting through holes along the circumference of the blade disc. The cutting through holes form a first opening and a second opening on the two end faces of the blade disc, respectively, with the first opening being larger than the second opening. The blades include a mounting base and a cutting part, with the cutting part located on both sides of the mounting base and having inclined cutting edges. This cutting blade assembly is applied to the sewage pump of a lift. The blade disc is fixed to the inlet end of the sewage pump, and the blades are located on the side of the blade disc near the second opening formed by the cutting through holes. A small gap is left between the blades and the blade disc. The mounting base of the blades is connected to the drive motor of the sewage pump. The drive motor of the sewage pump drives the blades to rotate, and the cutting edges of the blades cover the cutting through hole area of ​​the blade disc, forming a scissor effect with the cutting edge of the blade disc. When sewage enters the sewage pump through the cutting through holes of the blade disc, the blades and the blade disc cooperate to tear and cut the films, rubber, and plastics in the sewage, achieving a good pulverizing effect and ensuring that the sewage pump is not blocked.

[0054] Optional, such as Figure 2 and Figure 3 As shown, in this embodiment, the cutting blade assembly has a cutting through hole 13 on the blade disc 1 that is quadrilateral in shape. The cutting through hole 13 includes a first sidewall 131, a second sidewall 132, a third sidewall 133, and a fourth sidewall 134.

[0055] The first sidewall 131 and the third sidewall 132 of the cutting through hole 13 are arc-shaped and extend roughly along the radial direction of the cutter head 1. The length of the first sidewall 131 of the cutting through hole 13 is greater than the length of the third sidewall 133, and the second sidewall 132 is located on the side away from the center of the cutter head 1.

[0056] Furthermore, in this embodiment, the cutting blade assembly has a plurality of protruding teeth 14 spaced apart on the first sidewall 131 of the second opening side (the side near the small end of the blade). The protruding teeth 14 form tooth-shaped sharp edges at the cutting edge of the blade disc 1, increasing the sharpness of the cutting edge of the blade disc, thereby increasing the crushing effect on films, plastics, etc.

[0057] Optionally, in this embodiment, the cutting blade assembly has a blade edge 221 with an inclination angle of 18±5°.

[0058] Optionally, in this embodiment, the cutting blade assembly, blade disc 1 and blade 2 are made of alloy steel, and their hardness is approximately HRC58 after heat treatment.

[0059] Optionally, in this embodiment, the cutting blade assembly has a cutting groove 15 on the end face of the blade disc 1 on the side of the second opening (the end face of the small opening near the blade).

[0060] Multiple cutting grooves 15 are provided, and the extension direction of the multiple cutting grooves 15 forms a certain angle with the diameter direction of the cutter head 1.

[0061] Furthermore, in this embodiment, the cutting blade assembly includes a first cutting groove 15 on the blade disc 1, which includes a second cutting groove 151 and a third cutting groove 152.

[0062] Multiple first cutting grooves 151 are provided, and the multiple first cutting grooves 151 are evenly distributed in the area between the through hole 11 and the cutting through hole 13 of the cutter head 1, and the inner end of the first cutting groove 151 is connected to the through hole of the cutter head 1.

[0063] Multiple second cutting grooves 152 are also provided. Multiple second cutting grooves 152 are evenly distributed on the outside of the cutting through holes 13 of the cutter head 1. Each second cutting groove 152 is located in the area between two adjacent cutting through holes 13.

[0064] When blade 2 rotates, the blade edge covers the second cutting groove area of ​​the cutter disc, increasing the cutting and biting force between the blade and the cutter disc.

[0065] Furthermore, in this embodiment, the cutting blade assembly has a third cutting groove 212 on the end face of the mounting base 21 near the blade disc 1.

[0066] Multiple third cutting grooves 212 are provided. The multiple third cutting grooves 212 are located on the outer circumference of the mounting base 21 and are evenly distributed along the circumferential direction. In the diameter direction, the third cutting grooves 212 of the blade 2 correspond to the positions of the first cutting grooves 151 of the cutter head 1.

[0067] When the blade 2 rotates, the third cutting groove 212 of the blade 2 cooperates with the first cutting groove 151 of the cutter head 1 to achieve efficient grinding and tearing of fibrous impurities.

[0068] Example 2

[0069] Figure 6 This is a schematic diagram of the sewage pump for the lift in Embodiment 2 of this utility model.

[0070] like Figure 6As shown, the sewage pump for the lifter in this embodiment includes: a sewage pump body 100, and a cutting blade assembly as described in the above embodiment.

[0071] The cutter head 1 is fixedly installed at the inlet end (inlet) of the sewage pump body 100, and the blade 2 is installed on the outside of the cutter head 1 (the side away from the sewage pump body). The mounting base 21 of the blade 2 is connected to the motor shaft of the drive motor of the sewage pump body 100.

[0072] The motor shaft of the drive motor drives the blades to rotate. When sewage enters the sewage pump from the inlet end, it passes through the cutting holes of the cutter head. The blades and the cutter head work together to cut and shred the film, rubber, plastic and other debris in the sewage, preventing the debris from clogging the sewage pump and ensuring the smooth operation of the sewage pump.

[0073] In this utility model, unless otherwise explicitly specified and limited, the first feature being "on" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium.

[0074] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "under," and "beneath" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0075] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cutting blade assembly, characterized in that, Includes: cutter head and blades; The cutter head is provided with a through hole and a fixing through hole; The cutter head is provided with multiple cutting through holes, which are evenly distributed along the circumferential direction. The cutting through hole forms a first opening and a second opening on both sides of the cutter head, respectively. The sidewall of the cutting through hole has an axial slope, such that the first opening is larger than the second opening. The blade includes: a mounting base and a cutting section; The mounting base is provided with a mounting through hole, and the cutting part is provided on opposite sides of the mounting base. The cutting part is provided with an inclined blade. The cutter head is fixedly installed, and the blade is located on one side of the second opening of the cutter head with a gap between it and the cutter head. The mounting base is connected to an external drive mechanism. When the blade rotates, the cutting edge covers the cutting through hole area to cut and crush the passing debris.

2. The cutting blade assembly according to claim 1, characterized in that, The cut-through hole is quadrilateral in shape and includes: a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall; The first sidewall and the third sidewall are arc-shaped and extend radially, with the length of the first sidewall being greater than the length of the third sidewall.

3. The cutting blade assembly according to claim 2, characterized in that, The cutting through hole has multiple protruding teeth spaced apart on the first sidewall of the second opening side.

4. The cutting blade assembly according to claim 1, characterized in that, The blade has an inclination angle of 18±5°.

5. The cutting blade assembly according to claim 1, characterized in that, The cutter head and the blade are made of alloy steel with a hardness of HRC58.

6. The cutting blade assembly according to claim 1, characterized in that, The cutter head has multiple cutting grooves on the end face of the second opening side.

7. The cutting blade assembly according to claim 6, characterized in that, The cutting groove includes: a first cutting groove and a second cutting groove; Multiple first cutting grooves are evenly distributed between the through hole and the cutting through hole, and are connected to the through hole; Multiple second cutting grooves are evenly distributed on the outside of the cutting through holes, and each second cutting groove is located between two adjacent cutting through holes. When the blade rotates, the cutting edge covers the area of ​​the second cutting groove.

8. The cutting blade assembly according to claim 7, characterized in that, The mounting base has multiple third cutting grooves on its end face near the cutter head; The third cutting groove corresponds to the position of the first cutting groove.

9. A sewage pump for a lift, characterized in that, include: The sewage pump body and the cutting blade assembly as described in any one of claims 1 to 8; The cutter head is located at the inlet end of the sewage pump body, and the blades are connected to the drive motor of the sewage pump body.

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