Anti-blocking toilet stool and sewage pump thereof

Abstract

The utility model discloses an anti-blocking toilet stool and a sewage pump thereof, and belongs to the technical field of sanitary equipment. The sewage pump comprises a crushing part, a sewage discharge part and a motor which are connected in sequence, the impeller comprises a first cover plate, a second cover plate and a plurality of blades, the first cover plate is located on the sides, away from the motor, of the blades and provided with notches, and the rotating shaft penetrates through the centers of the notches. A flow guide part is arranged between the crushing part and the pollution discharge part, at least part of the flow guide part is of a rotary structure, and a flow guide channel is formed in the flow guide part; and the end part of the flow guide part extends into the notch, so that the flow guide channel is communicated with the internal space of the impeller. According to the sewage pump, due to the arrangement of the flow guide part, small sewage fragments are concentrated and converged to the flow guide channel before entering the sewage discharge cavity, directly enter the impeller from the flow guide channel, and are thrown out from the outer ends of the blades along the side walls of the blades under the action of inertia centrifugal force, so that fluid energy can be fully utilized when the sewage pump conveys sewage; and under the condition that the sewage pump lacks water or lacks water, the sewage can still be effectively pumped out.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitary equipment, and more specifically to an anti-blocking toilet and a sewage pump thereof. Background Art

[0002] At present, in some parts of my country, due to the lack of water resources or limited conditions, there is no ready-made sewer, and the old-fashioned toilets are still used. The old-fashioned toilets are unsanitary and easily breed mosquitoes and spread germs. Some existing technologies have proposed more hygienic portable toilets.

[0003] For example, a Chinese patent document (Announcement No.: CN 219452540 U) provides a crushing sewage pump, which includes a sewage inlet pipe, a shredding part, a sewage discharge part, and a driving part, which are sequentially distributed, wherein: an actuator is provided in the driving part, a cutter head and an impeller are provided on the transmission shaft of the actuator, the impeller is located in the sewage discharge part, the cutter head is located in the shredding part, and the actuator drives the cutter head and the impeller to rotate. The sewage discharge pipe of the crushing sewage pump is directly connected to the toilet, and the sewage enters the shredding part from the sewage inlet pipe. The cutter head crushes the solid sewage, and then enters the sewage discharge part and is discharged through the impeller. Its structure is simple and practical, and it is easy to install. The sewage inlet pipe is directly connected to the toilet, which can meet the use requirements of the toilet under the condition of less water volume and avoid blockage.

[0004] Since portable toilets generally require users to add water to the water tank themselves, the sewage pump in the prior art often works under the condition of little or no water, which results in low sewage discharge efficiency of the sewage pump and difficulty in effectively pumping out the sewage.

[0005] For the above problems, the related technologies do not provide effective solutions. Utility Model Content

[0006] In order to solve the problems that may exist in the related art, some embodiments of the present application provide a sewage pump, including a crushing part, a sewage discharge part and a motor connected in sequence; a crushing wheel is arranged in the crushing part, an impeller is arranged in the sewage discharge part, and the rotating shaft of the motor synchronously drives the crushing wheel and the impeller; the impeller includes a first cover plate, a second cover plate and a plurality of blades, and the first cover plate and the second cover plate are respectively connected to the two sides of the blade along the height direction; the first cover plate is located on the side of the blade away from the motor and is formed with a notch, and the rotating shaft passes through the center of the notch; a guide part is provided between the crushing part and the sewage discharge part, at least a part of the guide part is a rotating structure and a guide channel is formed therein; the end of the guide part extends into the notch, so that the guide channel is connected to the internal space of the impeller.

[0007] Furthermore, the notch covers the end of the guide portion, and the size of the area covered by the notch in the axial direction does not exceed 8 mm.

[0008] Furthermore, an anti-wear gap is provided between the end of the guide portion and the notch in a radial direction, and the anti-wear gap surrounds the guide portion.

[0009] Furthermore, the anti-wear gap is 0.5 to 2.5 mm.

[0010] Furthermore, taking the plane where the notch is located as a horizontal projection plane, the orthographic projection of the notch on the horizontal projection plane covers the orthographic projection of the inner end of the blade on the horizontal projection plane.

[0011] Furthermore, the height of the inner end of the blade gradually decreases toward the center of the impeller, and the upper part thereof is streamlined.

[0012] Furthermore, a mounting seat is provided on a side of the center of the second cover plate facing the notch. The mounting seat is in a truncated cone shape and a mounting hole is provided at the center thereof for accommodating the rotating shaft.

[0013] Furthermore, the distance between the blade and the mounting seat is 4 mm to 15 mm.

[0014] Furthermore, a pump outlet is provided on the side wall of the sewage pump, the outer periphery of the impeller is opposite to the pump outlet, and the distance between the outer edge of the first cover plate and the outer edge of the second cover plate is smaller than the diameter of the pump outlet.

[0015] Furthermore, the guide portion has an inlet end facing the crushing portion and an outlet end facing the impeller, the inlet end is larger than the outlet end, and the guide channel gradually shrinks toward an end close to the impeller.

[0016] Furthermore, the middle portion of the first cover plate protrudes toward the crushing portion, so that its longitudinal section is trapezoidal.

[0017] To achieve the above-mentioned purpose, some embodiments of the present application further provide an anti-blocking toilet, which is characterized by:

[0018] It includes a toilet body and the sewage pump. The bottom of the toilet body is provided with a sewage outlet which is roughly arranged horizontally. The sewage pump is connected to the sewage outlet so that the toilet body is communicated with the pump inlet of the sewage pump. The pump inlet is arranged on the side of the crushing part away from the sewage discharge part. The rotating shaft of the motor can drive the impeller to rotate, so as to suck out the dirt in the toilet body.

[0019] Furthermore, the pump inlet is circular and is eccentrically arranged relative to the crushing wheel.

[0020] Furthermore, the pump inlet is connected to the toilet body through an adapter, which has a first port and a second port, the first port is adapted to the sewage outlet of the toilet body, the second port is adapted to the shape of the pump inlet, and the first port is larger than the second port.

[0021] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0022] When the dirt enters the crushing part from the pump inlet, it will receive the turbulence of the crushing wheel, and the dirt will be cut into smaller and dispersed solid units by the blades. The setting of the guide part in the present application allows the smaller dirt fragments to be concentrated and converged to the guide channel before entering the sewage discharge chamber, and directly enter the impeller from the guide channel. Under the action of inertial centrifugal force, they are thrown out from the outer end of the blade along the side wall of the blade. In this process, the pressure leakage and vortex loss are greatly reduced, so that the sewage pump can make full use of the fluid energy when conveying sewage, and can still effectively pump out the sewage when there is little or no water in the sewage pump. At the same time, after the dirt directly enters the impeller, it can also reduce the dirt adhering to the surface of the first cover plate, so that the blades can throw out the dirt as much as possible, improve the cleanliness of the toilet body, and reduce the odor it emits indoors. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0024] Figure 1 This is a partial structural schematic diagram of an anti-blocking toilet according to an embodiment of the present application;

[0025] Figure 2 This is a partial structural schematic diagram of an anti-blocking toilet according to an embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of the explosion structure of a sewage pump according to an embodiment of the present application;

[0027] Figure 4 A schematic diagram of a cross-sectional structure of a sewage pump according to an embodiment of the present application;

[0028] Figure 5 This is a schematic diagram of an impeller structure according to an embodiment of the present application;

[0029] Figure 6 It is a partially enlarged schematic diagram of the cross-sectional structure of a sewage pump according to an embodiment of the present application;

[0030] Figure 7It is a partially enlarged schematic diagram of the cross-sectional structure of a sewage pump according to an embodiment of the present application;

[0031] Figure 8 This is a schematic diagram of an impeller structure according to an embodiment of the present application;

[0032] Fig. 9 This is a schematic diagram of an impeller structure according to an embodiment of the present application;

[0033] Fig.10 This is a schematic diagram of the cross-sectional structure of an impeller according to an embodiment of the present application;

[0034] Fig.11 This is a schematic diagram of an impeller structure according to an embodiment of the present application;

[0035] Fig.12 It is a partially enlarged schematic diagram of the cross-sectional structure of a sewage pump according to an embodiment of the present application;

[0036] Description of labels:

[0037] 100, toilet body; 110, sewage outlet; 120, support shell; 130, water tank;

[0038] 200. Sewage pump;

[0039] 210, pump inlet;

[0040] 220, pump outlet;

[0041] 230, crushing part; 231, crushing wheel;

[0042] 240, sewage discharge part; 241, impeller; 242, first cover plate; 242a, notch; 242b, matching ring; 243, second cover plate;

[0043] 243a, mounting seat; 243b, mounting hole; 244, blade;

[0044] 250, motor; 251, rotating shaft;

[0045] 260, flow guide portion; 261, flow guide channel; 261a, inlet end; 261b, outlet end;

[0046] 300, anti-wear clearance;

[0047] 400, adapter; 410, first port; 420, second port. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0050] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0051] like Figure 1 As shown, this embodiment provides an anti-blocking toilet, including a toilet body 100 and a sewage pump 200. The bottom of the toilet body 100 is provided with a sewage outlet 110, and the sewage pump 200 is connected to the sewage outlet 110, so that the toilet body 100 is communicated with the pump inlet 210 of the sewage pump 200. Specifically, the water-saving toilet also includes a support shell 120 and a water tank 130, and the water tank 130 is arranged on the support shell 120. The water tank 130 and the sewage pump 200 are located on the same side of the toilet body 100 to improve the space utilization of the anti-blocking toilet and make it more portable.

[0052] like Figure 2 As shown, the sewage pump 200 includes a crushing part 230, a sewage discharge part 240 and a motor 250 connected in sequence, and a pump outlet 220 is provided on the side wall of the sewage discharge part 240. The crushing part 230 and the sewage discharge part 240 are both entities with cavities. For ease of assembly, the crushing part 230 and the sewage discharge part 240 can be a split structure.

[0053] like Figures 3 to 5As shown, a crushing wheel 231 is disposed in the crushing part 230, and the pump inlet 210 is disposed on the side of the crushing part 230 away from the sewage discharge part 240. Specifically, the pump inlet 210 is circular, and the pump inlet 210 is eccentrically disposed relative to the crushing wheel 231, that is, the center line of the pump inlet 210 is staggered from the center line of the crushing part 230, and can be eccentric upward or downward. In this way, it can also prevent all the dirt from directly entering the crushing part 230, causing the crushing wheel 231 to get stuck.

[0054] Specifically, if Figure 3 As shown, the crushing wheel 231 is composed of a plurality of blades, and the number and shape of the blades are not limited. Preferably, the edge of the blade is arc-shaped, which is convenient for crushing softer dirt in the toilet. Compared with the blade with a straight edge and a sharp angle, the blade with an arc-shaped edge has stronger anti-winding and anti-wear capabilities and is more suitable for the working environment of the toilet.

[0055] like Figure 3 As shown, an impeller 241 is disposed in the sewage discharge part 240 , and the outer periphery of the impeller 241 is opposite to the pump outlet 220 .

[0056] like Figure 3 , Figure 4 As shown, the rotating shaft 251 of the motor 250 synchronously drives the breaking wheel 231 and the impeller 241 to suck out the dirt in the toilet body 100 and break it up and discharge it from the pump outlet 220.

[0057] like Figure 5 As shown, the impeller 241 includes a first cover plate 242, a second cover plate 243 and a plurality of blades 244. The first cover plate 242 and the second cover plate 243 are respectively connected to both sides of the blades 244 in the height direction, so that the impeller 241 forms a relatively closed space. Specifically, the outer edge of the first cover plate 242 and the outer edge of the second cover plate 243 are aligned in the axial direction.

[0058] Furthermore, the distance between the outer edge of the first cover plate 242 and the outer edge of the second cover plate 243 is smaller than the diameter of the pump outlet 220 , so as to prevent the waste discharge part 240 from causing unnecessary interference to the waste after the waste escapes from the impeller 241 .

[0059] As an optional solution, the first cover plate 242, the second cover plate 243 and the blades 244 are integrally formed to reduce internal vibrations between the impeller 241 when it rotates.

[0060] The first cover plate 242 is located at a side of the blade 244 away from the motor 250 and is formed with a notch 242a, that is, the notch 242a faces the crushing part 230, and the rotating shaft 251 passes through the center of the notch 242a. Specifically, the impeller 241 is connected to the rotating shaft 251 through the second cover plate 243.

[0061] like Figure 6 As shown, a guide portion 260 is provided between the crushing portion 230 and the sewage discharge portion 240. At least a portion of the guide portion 260 is a rotary structure and a guide channel 261 is formed inside the guide portion 260. The end of the guide portion 260 extends into the slot 242a, so that the guide channel 261 is communicated with the internal space of the impeller 241. When the dirt enters the crushing part 230 from the pump inlet 210, it will receive the turbulence of the crushing wheel 231, and the dirt will be cut into smaller and dispersed solid units by the blades. The setting of the guide part 260 in the present application allows the smaller dirt fragments to be concentrated and converged to the guide channel 261 before entering the sewage discharge chamber, and directly enter the impeller 241 from the guide channel 261. Under the action of inertial centrifugal force, it is thrown out from the outer end of the blade 244 along the side wall of the blade 244. In this process, the pressure leakage and vortex loss are greatly reduced, so that the sewage pump 200 can make full use of the fluid energy when conveying the dirt, and can still effectively pump out the dirt when the sewage pump 200 has little or no water. At the same time, after the dirt directly enters the impeller 241, it can also reduce the dirt attached to the surface of the first cover plate 242, so that the blade 244 can throw out the dirt as much as possible, improve the cleanliness of the toilet body 100, and reduce the odor it emits indoors.

[0062] In addition, due to the working environment of the portable toilet, in order to further save water, the sewage pump 200 and the sewage outlet 110 of the toilet body 100 are generally as close as possible. When the sewage pump 200 is not working, the sewage has a chance to directly enter the sewage part 240. The setting of the first cover plate 242 in the present application simultaneously reduces the risk of the blades 244 being entangled and blocked by sewage, thereby reducing the difficulty of user maintenance and cleaning.

[0063] Optionally, the guide portion 260 may be formed integrally with the crushing portion 230 , or may be formed integrally with the sewage discharge portion 240 .

[0064] Specifically, if Figure 6 As shown, the groove 242a covers the end of the guide portion 260, and the size of the area covered by it in the axial direction does not exceed 8 mm, for example, 2 mm, 4.5 mm, 5 mm, 6.2 mm or 7 mm, etc. If this value is exceeded, it is easy for the guide portion 260 to interfere with the internal space of the impeller 241, or cause the impeller 241 to increase unnecessary volume, thereby increasing the resistance of the impeller 241 when rotating.

[0065] Further, such as Figure 7As shown, the guide portion 260 has an inlet end 261a facing the crushing portion 230 and an outlet end 261b facing the impeller 241, the inlet end 261a is larger than the outlet end 261b, and the guide channel 261 gradually shrinks toward the end close to the impeller 241, that is, the guide channel 261 is configured with a variable diameter, which not only enables the guide member to be adapted to the slot 242a, but also enables the dirt to be pressurized to a certain extent in the guide channel 261, thereby further enhancing the pumping pressure of the sewage pump 200.

[0066] Further, such as Figure 7 As shown, in order to prevent mechanical wear between the impeller 241 and the guide part 260 when rotating at high speed, the end of the guide part 260 and the notch 242a have an anti-wear gap 300 in the radial direction, and the anti-wear gap 300 surrounds the guide part 260. At the same time, this setting utilizes the characteristics of the impeller 241 itself. When the impeller 241 rotates at high speed, its blades 244 rotate synchronously with the first cover plate 242 and the second cover plate 243. The flow rate generated by the blades 244 is greater than the flow rate generated on the surface of the first cover plate 242. The air and other media outside the impeller 241 are sucked into the impeller 241 from the anti-wear gap 300, making the anti-wear gap 300 a "one-way channel" to prevent dirt from flowing out of the impeller 241 through the anti-wear gap 300 and fully merging into the impeller 241 from the guide channel 261. Compared with the cooperation between the impeller 241 and the guide part 260 using components such as bearings, this setting has a simple structure and is easy to clean and repair.

[0067] Specifically, the anti-wear gap 300 is 1 to 2.5 mm, such as 1.1 mm, 1.5 mm or 2.4 mm, etc. When air enters the sewage pump 200 to cause fluid turbulence or sewage backflow, larger debris can be prevented from entering the anti-wear gap 300 .

[0068] Specifically, combined Figure 7 and Figure 8 The first cover plate 242 is formed with a raised matching ring 242b, which constitutes a part of the groove 242a to cooperate with the guide part 260 to form an anti-wear gap 300, so that the first cover plate 242 does not need to be thickened to match the guide part 260, thereby meeting its lightweight requirements and reducing its rotational resistance.

[0069] Further, such as Figure 8 As shown, the plane where the slot 242a is located is the horizontal projection plane, and the orthographic projection of the slot 242a on the horizontal projection plane covers the orthographic projection of the inner end of the blade 244 on the horizontal projection plane. The human eye can directly see the inner end of the blade 244 through the slot 242a. After the dirt enters the slot 242a, it can be quickly driven away by the blade 244.

[0070] Due to the arrangement of the notch 242a, the inner end of the blade 244 needs to bear the pressure of the dirt first, so preferably, as Fig. 9 As shown, the height of the inner end of the blade 244 gradually decreases toward the center of the impeller 241, and its upper part is streamlined, which reduces the force-bearing area at the inner end of the blade 244, balances the pressure on the blade 244 as a whole, and prevents the blade 244 from being deformed or even damaged due to the inner end of the blade 244 being subjected to excessive pressure for a long time, thereby reducing the pumping efficiency of the sewage pump 200.

[0071] Specifically, if Fig. 9 As shown, a mounting seat 243a is provided on a side of the second cover plate 243 facing the notch 242a, and a mounting hole 243b is provided at the center thereof for accommodating the rotating shaft 251. The mounting seat 243a can be a cylindrical structure or other structures with edges.

[0072] Preferably, Fig. 9 As shown, the mounting seat 243a is in the shape of a truncated cone. When dirt enters from the slot 242a, the truncated cone-shaped mounting seat 243a can more evenly distribute the load of the dirt to the second cover plate 243, thereby reducing the risk of local stress concentration at the connection point between the impeller 241 and the rotating shaft 251, and reducing the situation where the centrifugal force distribution of the impeller 241 is unbalanced due to excessive pressure in the center of the impeller 241.

[0073] Further, such as Fig.10 As shown, there is a gap between the blade 244 and the mounting seat 243a. If the blade 244 is directly connected to the mounting seat 243a, the connection between the blade 244 and the mounting seat 243a will be subject to many dirt particles, which will reduce the wear resistance of the inner end of the blade 244 and affect the mechanical properties of the blade 244 itself.

[0074] Specifically, the distance between the blade 244 and the mounting seat 243a is 4 mm to 15 mm, such as 5 mm, 7 mm, 10 mm or 13 mm, so that a certain pressure is dispersed on the plane between the blade 244 and the mounting seat 243a.

[0075] Optionally, the first cover plate 242 and the second cover plate 243 are both substantially planar plates.

[0076] Preferably, Fig.11 As shown, the middle portion of the first cover plate 242 protrudes toward the crushing portion 230, so that its axial cross-section is trapezoidal, thereby increasing its structural strength.

[0077] Further, such as Fig.12As shown, the pump inlet 210 is connected to the toilet body 100 through an adapter 400, and the adapter 400 has a first port 410 and a second port 420. The first port 410 is adapted to the sewage outlet 110 of the toilet body 100, and the second port 420 is adapted to the shape of the pump inlet 210. After the sewage enters the toilet body 100, it enters the sewage pump 200 through the adapter 400. The adapter 400 can be tubular or annular, and its internal channel can be linear or bendable, so that the toilet body 100 and the sewage pump 200 are effectively connected.

[0078] Furthermore, the first port 410 is larger than the second port 420, so that the adapter 400 can also perform a certain pressure-increasing treatment on the sewage. Specifically, the inner wall of the adapter 400 is tapered and shrinks toward the end close to the sewage pump 200, and the axial cross-section of the inner wall is arc-shaped to prevent the adapter 400 from causing stagnation of the sewage.

[0079] In this application, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0080] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sewage pump, comprising a crushing part, a sewage discharge part and a motor connected in sequence; a crushing wheel is arranged in the crushing part, an impeller is arranged in the sewage discharge part, and a rotating shaft of the motor synchronously drives the crushing wheel and the impeller; Features: The impeller comprises a first cover plate, a second cover plate and a plurality of blades, wherein the first cover plate and the second cover plate are respectively connected to both sides of the blade in the height direction; the first cover plate is located on a side of the blade away from the motor and is formed with a notch, and the rotating shaft passes through the center of the notch; A flow guide portion is provided between the crushing portion and the sewage discharge portion, at least a portion of the flow guide portion is a rotary structure and a flow guide channel is formed inside the flow guide portion; The end of the flow guide portion extends into the notch, so that the flow guide channel is communicated with the inner space of the impeller.

2. A sewage pump according to claim 1, characterized in that: The notch covers the end of the guide portion, and the size of the area covered by the notch in the axial direction does not exceed 8 mm.

3. A sewage pump according to claim 1, characterized in that: An anti-wear gap is provided between the end of the guide portion and the notch in a radial direction, and the anti-wear gap surrounds the guide portion.

4. A sewage pump according to claim 3, characterized in that: The anti-wear gap is 0.5 to 2.5 mm.

5. A sewage pump according to claim 1, characterized in that: The plane where the notch is located is taken as a horizontal projection plane, and the orthographic projection of the notch on the horizontal projection plane covers the orthographic projection of the inner end of the blade on the horizontal projection plane.

6. A sewage pump according to claim 5, characterized in that: The height of the inner end of the blade gradually decreases toward the center of the impeller, and the upper part thereof is streamlined.

7. A sewage pump according to claim 1, characterized in that: A mounting seat is arranged on a side of the center of the second cover plate facing the notch. The mounting seat is in a truncated cone shape and a mounting hole is arranged at the center thereof for accommodating the rotating shaft.

8. A sewage pump according to claim 7, characterized in that: The distance between the blade and the mounting seat is 4 mm to 15 mm.

9. A sewage pump according to claim 1, characterized in that: The side wall of the sewage pump is provided with a pump outlet, the outer periphery of the impeller is opposite to the pump outlet, and the distance between the outer edge of the first cover plate and the outer edge of the second cover plate is smaller than the diameter of the pump outlet.

10. A sewage pump according to claim 1, characterized in that: The guide portion has an inlet end facing the crushing portion and an outlet end facing the impeller, the inlet end is larger than the outlet end, and the guide channel gradually shrinks toward an end close to the impeller.

11. A sewage pump according to claim 1, characterized in that: The middle portion of the first cover plate protrudes toward the crushing portion, so that the longitudinal section thereof is trapezoidal.

12. An anti-blocking toilet, characterized in that: It comprises a toilet body and the sewage pump as claimed in any one of claims 1 to 11, wherein the bottom of the toilet body has a sewage outlet, the sewage pump is connected to the sewage outlet, so that the toilet body is communicated with the pump inlet of the sewage pump, and the pump inlet is arranged on the side of the crushing part away from the sewage discharge part.

13. The anti-blocking toilet according to claim 12, characterized in that: The pump inlet is circular and is eccentrically arranged relative to the crushing wheel.

14. The anti-blocking toilet according to claim 12 or 13, characterized in that: The pump inlet is connected to the toilet body through an adapter, which has a first port and a second port. The first port is adapted to the sewage outlet of the toilet body, and the second port is adapted to the shape of the pump inlet. The first port is larger than the second port.

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