Sewage pump

Abstract

The invention relates to the technical field of sewage treatment, in particular to a sewage pump which comprises a shell, a water pumping structure arranged at the lower end in the shell, a driving motor arranged at the upper end in the shell and provided with the output end connected to the water pumping structure, and a water outlet pipe arranged outside the shell and communicated with the water pumping structure. A cutting blade rotating along with the driving motor is arranged at a water inlet in the lower end of the shell, a protection device used for preventing pebbles from being sucked in by the water pumping structure is arranged at the lower end of the exterior of the shell, the pebbles flowing to the water inlet notch are beaten out by the protection device, and therefore the situation that the water inlet is blocked by large pebbles is prevented; and slightly larger stones can also be knocked out by the protection device, so that the stones are prevented from entering the sewage pump to block the sewage pump.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a sewage pump. Background Art

[0002] There is a cutting type sewage pump, which is a kind of sewage pump and is also called a cutting pump or a double-blade cutting pump. It can tear and cut long fibers, bags, belts, grass, cloth strips and other materials in sewage, and then discharge them smoothly. It is particularly suitable for conveying liquids containing hard solids and fibers and particularly dirty, sticky and slippery liquids. Its specific structure includes a shell, a pumping structure arranged at the lower end of the shell, a driving motor arranged at the upper end of the shell and connected to the pumping structure at the output end, and a water outlet pipe arranged outside the shell and connected to the pumping structure. A water inlet is opened at the lower end of the shell, and a cutting blade rotating with the driving motor is arranged at the water inlet at the lower end of the shell to cut those fibers that are easy to entangle or bunch, so as to prevent them from blocking the flow channel of the sewage pump.

[0003] However, when pumping water from small ponds, sewage pits, fish ponds and other silty waters, larger stones are often driven to the water inlet at the lower end of the outer shell by the pumped water flow. The larger stones will block the water inlet, and the cutting blade may break when cutting slightly larger stones after they are pumped into the sewage pump. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a sewage pump to solve the technical problem that the sewage pump in the prior art cannot handle larger stones when pumping water.

[0005] The above-mentioned purpose of the present application is achieved through the following technical scheme: a sewage pump, including a shell, a pumping structure arranged at the lower end of the shell, a driving motor arranged at the upper end of the shell and the output end of which is connected to the pumping structure, and a water outlet pipe arranged outside the shell and connected to the pumping structure, a water inlet is opened at the lower end of the shell, a cutting blade rotating with the driving motor is arranged at the water inlet at the lower end of the shell, and a protective device for preventing stones from being sucked into the pumping structure is provided at the lower end of the outer shell.

[0006] Furthermore, the protective device includes a support plate fixedly mounted on the outer shell and a protective circular plate coaxially fixedly connected to the output end of the driving motor with the cutting blade. The support plate is circular and has a plurality of water inlet notches on its circumference. The protective circular plate is located inside the support plate and its circumference is in contact with the support plate. The protective circular plate is located in the middle of the water inlet notch and its circumference blocks most of the area of ​​the water inlet notch.

[0007] By adopting the above technical solution and setting the protective device, the water pipe is first installed on the outlet pipe, and then the sewage pump is placed in the water area. The support plate supports the sewage pump so that the water inlet of the sewage pump is at a certain distance from the bottom of the water area. At this time, the drive motor is started to drive the pumping structure to pump water in the water area. As the water flows through the water inlet gap, it is gradually pumped out by the pumping structure. Due to the flow of water, some larger stones flow to the water inlet gap. At this time, due to the setting of the protective circular plate, the protective circular plate is connected to the output end of the drive motor. Therefore, when the pumping structure is working, the protective circular plate is also rotating. The rotating protective circular plate causes the stones flowing to the water inlet gap to be knocked out by the rotating protective circular plate, thereby preventing larger stones from blocking the water inlet gap, and slightly larger stones will also be knocked out by the rotating protective circular plate to prevent them from entering the sewage pump and blocking the sewage pump.

[0008] Furthermore, a circular opening is provided on the bottom surface of the protective circular plate and extends to the upper surface of the protective circular plate. An acceleration component for accelerating the flow of water is provided in the circular opening. The acceleration component includes a spiral plate fixedly arranged in the protective circular plate and arranged along the height direction of the circular opening.

[0009] By adopting the above technical solution, although the setting of the protective circular plate can prevent larger stones and slightly larger stones from entering the sewage pump and blocking the sewage pump, the circumferential surface of the protective circular plate blocks most of the area of ​​the water inlet gap, which also means that the water flow can only enter from the part of the upper end of the water inlet gap that is not blocked by the circumferential surface of the protective circular plate, while the part of the lower end of the water inlet gap that is not blocked by the circumferential surface of the protective circular plate is blocked by the bottom surface of the protective circular plate. The setting of the circular through hole solves this technical problem. Through the setting of the circular through hole, the water flow can enter from both the upper end of the water inlet gap and the lower end of the water inlet gap, thereby improving the pumping efficiency of the sewage pump. However, since the protective circular plate is rotating, the circular opening has limited effect on improving the pumping efficiency. The setting of the acceleration component solves this technical problem. Through the setting of the spiral plate, a spiral channel is formed inside the opening with the axis of the protective circular plate. When the protective circular plate rotates, the centrifugal force and the spiral channel reduce the fluid resistance, allowing the fluid to flow more smoothly, so that the protective circular plate can accelerate the speed at which the water flows into the pumping structure, thereby further improving the pumping efficiency of the sewage pump. The setting of the spiral plate can stir the sludge when the sewage pump is extracting sludge, making it easier to extract.

[0010] Furthermore, supporting structures for supporting the sewage pump and preventing the sewage pump from sinking are provided on both sides of the outer shell.

[0011] Furthermore, the support structure includes extension plates arranged on both sides of the shell, a support plate arranged at one end of the extension plate away from the shell and extending downward, and an abutment plate arranged at one end of the support plate away from the extension plate and extending laterally, and the abutment plate is located below the support plate.

[0012] By adopting the above technical scheme, although the circular opening and the acceleration component are provided to improve the pumping efficiency of the sewage pump, when the sewage pump is placed, the support plate needs to abut the bottom surface of the water area. The bottom surface of the water area is very soft due to long-term soaking in water. This causes the support plate to sink to a certain extent after the sewage pump is placed, resulting in the part of the lower end of the water inlet notch that is not blocked by the circumferential surface of the protective circular plate being blocked. Although the spiral plate can stir the bottom surface of the water area, it will still have a certain impact on the pumping efficiency of the sewage pump. The setting of the support structure solves this technical problem. When the sewage pump is placed in the water area, the abutment plate first contacts the bottom surface of the water area to provide certain support for the sewage pump, and then the support plate will abut the bottom surface of the water area, thereby reducing the gravity on the support plate, thereby preventing the support plate from sinking too much and affecting the pumping efficiency of the sewage pump.

[0013] Furthermore, storage grooves for accommodating the supporting structure are provided on both sides of the exterior of the shell, and a folding structure for folding the supporting structure is provided on the supporting structure. The folding structure includes a storage groove opened on the bottom surface of the extension plate for accommodating the support plate, and a storage opening opened on the support plate for accommodating the abutment plate. One end of the extension plate is located at the upper end of the storage groove and is rotatably connected to the shell. The support plate is a telescopic plate and one end is located in the storage groove and is rotatably connected to the extension plate. One end of the abutment plate is located at the lower end of the storage opening and is rotatably connected to the support plate. A support spring is provided in the support plate to prevent the support plate from shortening.

[0014] By adopting the above technical solution, although the setting of the support structure can prevent the support plate from sinking too much and affecting the pumping efficiency of the sewage pump, it also leads to an increase in the storage area of ​​the outer shell, making the sewage pump as a whole difficult to store and transport. The setting of the folding structure solves this technical problem. Through the setting of the folding structure, after the sewage pump is used, it can be stored in the storage opening by rotating the abutment plate, and then the support plate is rotated to be stored in the storage groove, and then the extension plate is rotated to be stored in the storage groove. The support structure does not affect the storage area of ​​the outer shell, so that the sewage pump is easy to store and transport. The support spring is used to enable the support plate to be retractable for easy storage without affecting its own supporting force.

[0015] Furthermore, a first limiting structure is provided at the rotationally connected extension plate of the support plate for preventing the support plate from rotating during use, and a second limiting structure is provided at the lower end of the support plate and the upper surface of the abutment plate for preventing the abutment plate from rotating during use.

[0016] Furthermore, the first limiting structure includes a supporting bending spring arranged at the angle between the support plate and the extension plate, one end of the supporting bending spring is fixedly connected to the extension plate, and the other end is fixedly connected to the support plate, and the second limiting structure includes a limiting plate rotatably arranged at the lower end of the support plate and a limiting groove opened on the abutment plate, and one end of the limiting plate away from the support plate extends into the limiting groove.

[0017] Furthermore, a receiving groove for receiving the limiting plate is provided on the upper surface of the abutting plate, and the limiting groove is located in the receiving groove.

[0018] By adopting the above technical solution, although the setting of the folding structure makes the supporting structure not affect the storage area of ​​the shell, making the sewage pump easy to store and transport, it also causes that during the use of the supporting structure, when the supporting structure is subjected to large vibration, the abutment plate and the support plate may rotate, causing the sewage pump to lose the support of the support structure. The setting of the first limiting structure and the second limiting structure solves this technical problem. When using the support structure, first rotate the abutment plate to a downward tilted state, then rotate the limiting plate to a downward tilted rotation, and then rotate the abutment plate to make the limiting groove close to the limiting plate, so that the limiting plate is inserted into the limiting groove to limit the rotation of the abutment plate, and the supporting bending spring will press the support plate to a vertical state to prevent the support plate from rotating and folding, thereby improving the stability of the support structure during use, and the accommodating groove is used to accommodate the limiting plate when the abutment plate rotates and folds, to prevent the limiting plate from affecting the folding of the abutment plate.

[0019] Furthermore, a protective structure for preventing the supporting structure from detaching from the storage slot is provided directly above the storage slot, and the protective structure includes a U-shaped frame fixed on the outer shell and a protective plate plugged into the U-shaped frame, and the protective plate is used to cover the entire storage slot.

[0020] By adopting the above technical solution, although the setting of the first limiting structure and the second limiting structure improves the stability of the support structure during use, since the support spring will always press the support plate in a vertical state, the elastic force of the support spring will not disappear when the support plate is folded. This causes the entire support structure to be folded up and stored in the storage slot. The elastic force of the support spring will cause the support structure to rotate outside the storage slot, making it very inconvenient to keep the support structure pressed when it is stored. The setting of the protective structure solves this technical problem. When the entire support structure is folded up and stored in the storage slot, the protective plate is pushed to cover the entire storage slot, thereby limiting the support structure to the storage slot, making it more convenient to store the support structure.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: By setting up the protective device, the protective circular plate is connected to the output end of the driving motor. Therefore, when the pumping structure is working, the protective circular plate is also rotating. The rotating protective circular plate causes the stones flowing toward the water inlet gap to be knocked out by the rotating protective circular plate, thereby preventing larger stones from blocking the water inlet gap, and causing slightly larger stones to be knocked out by the rotating protective circular plate, thereby preventing them from entering the sewage pump and blocking the sewage pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the embodiment; Figure 2 It is another view of the overall structure of the embodiment; Figure 3 This is a view of the internal structure of the protective circular plate.

[0023] Figure numerals: 1. outer shell; 10. storage groove; 2. protective device; 20. support plate; 21. protective circular plate; 22. water inlet gap; 23. circular opening; 24. spiral plate; 3. support structure; 30. extension plate; 31. support plate; 32. abutment plate; 4. folding structure; 40. storage groove; 41. storage opening; 42. accommodating groove; 5. supporting bending spring; 6. second limiting structure; 60. limiting plate; 61. limiting groove; 7. protective structure; 70. U-shaped frame; 71. protective plate. DETAILED DESCRIPTION

[0024] The present application is further described in detail below with reference to the accompanying drawings.

[0025] Example, see Figure 1 A sewage pump comprises a shell 1, a pumping structure arranged at the lower end of the shell 1, a driving motor arranged at the upper end of the shell 1 and having an output end connected to the pumping structure, and a water outlet pipe arranged outside the shell 1 and connected to the pumping structure. A water inlet is provided on the lower end surface of the shell 1, and a cutting blade rotating with the driving motor is provided at the water inlet at the lower end of the shell 1.

[0026] However, in the face of complex and changeable water environments, especially waters containing a large number of stones, a simple cutting blade may still not be enough to completely prevent the occurrence of blockage. Therefore, in this embodiment, a protective device 2 is provided at the lower end of the outer shell 1 to prevent stones from being sucked into the pumping structure, aiming to further reduce the potential threat of hard objects such as stones to the pumping structure. This protective device 2 consists of two parts: one is a support plate 20 fixed to the shell 1, which is circular in shape and has multiple water inlet notches 22 on the circumference so that water can flow smoothly into the pump body; the other is a protective circular plate 21 that is coaxial with the cutting blade and fixedly connected to the output end of the drive motor.

[0027] The design of the support plate 20 not only provides the necessary support, but also realizes the effective guidance of the water flow through the setting of the water inlet gap 22. The protective circular plate 21 is located inside the support plate 20, and its circumference is tightly fitted to the support plate 20, and is exactly located in the middle of the water inlet gap 22. This layout enables the protective circular plate 21 to effectively block and change the movement trajectory of hard objects such as stones flowing to the water inlet gap 22 when rotating. Since the protective circular plate 21 is connected to the output end of the drive motor, when the pumping structure starts working, the protective circular plate 21 will also rotate synchronously. This rotating protective circular plate 21 can effectively knock out hard objects such as stones flowing to the water inlet gap 22 through the collision and striking action of its circumference, thereby effectively preventing larger stones from blocking the water inlet gap 22. At the same time, even some slightly larger stones will be knocked out under the action of the rotating protective circular plate 21, avoiding the risk of them entering the sewage pump and causing blockage.

[0028] In summary, the provision of the protective device 2 not only improves the pumping efficiency of the sewage pump, but also significantly enhances its ability to cope with complex water environments, thereby ensuring the long-term stable operation of the sewage pump.

[0029] Although the setting of the protective circular plate 21 has shown a significant effect in preventing stones from clogging the sewage pump, the setting of its circumference blocking most of the area of ​​the water inlet gap 22 has limited the entry path of the water flow to a certain extent. Specifically, the water flow mainly relies on the part of the upper end of the water inlet gap 22 that is not blocked by the protective circular plate 21 to enter the pump body, while the lower end of the water inlet gap 22, although there is an area that is not directly blocked by the circumference of the protective circular plate 21, cannot be effectively used due to the obstruction of the bottom surface of the protective circular plate 21. The limitation of this setting undoubtedly has a certain impact on the pumping efficiency of the sewage pump.

[0030] In order to solve this technical problem, refer to Figure 2 as well as Figure 3 In this embodiment, a circular opening 23 is provided on the bottom surface of the protective circular plate 21 and extends to the upper surface of the protective circular plate 21. The introduction of the circular opening 23 not only provides an additional entry channel for water flow, so that water flow can enter the pump body from the upper and lower ends of the water inlet notch 22 at the same time, thereby effectively widening the entry path of water flow, but also further improves the pumping efficiency of the sewage pump. However, the effect of improving the pumping efficiency by simply relying on the setting of the circular opening 23 is still limited, especially when the protective circular plate 21 continues to rotate.

[0031] In order to maximize the use of the circular opening 23, the present embodiment further provides an acceleration component in the circular opening 23. The core component of the acceleration component is a spiral plate 24 arranged along the height direction of the circular opening 23, which is fixedly arranged inside the protective circular plate 21. The spiral plate 24 is located inside the circular opening 23 with the axis of the protective circular plate 21 as the center, forming a spiral channel. When the protective circular plate 21 rotates, this spiral channel not only promotes the flow of fluid through centrifugal force, but also reduces the resistance of the fluid in the channel by virtue of its unique structure, so that the fluid can flow more smoothly along the spiral channel.

[0032] This design not only significantly accelerates the speed of water flowing into the pumping structure, thereby further improving the pumping efficiency of the sewage pump, but also plays a stirring role when the sewage pump extracts sludge and other sticky substances, making it easier to extract sludge and other sticky substances. This dual function of the spiral plate 24 has undoubtedly made a significant contribution to the performance improvement of the sewage pump. In summary, through the combination of the circular opening 23 and the acceleration component, this embodiment not only successfully solves the problem of limited water flow entry, but also further improves the overall pumping efficiency and adaptability of the sewage pump.

[0033] Although the clever combination of the circular opening 23 and the acceleration component significantly improves the pumping efficiency of the sewage pump, in actual applications, the installation environment of the sewage pump is often complex and changeable. Especially when the sewage pump is placed at the bottom of the water area, a problem that cannot be ignored emerges. Since the bottom of the water area is soaked in water for a long time, the soil structure becomes soft, which directly leads to the support plate 20 of the sewage pump being prone to sinking to a certain extent due to gravity after it is placed. This sinking phenomenon will cause the lower end of the water inlet notch 22 originally designed for water flow to be blocked by the sunken support plate 20, which will affect the normal pumping efficiency of the sewage pump. Although the setting of the spiral plate 24 can alleviate this problem to a certain extent by stirring the bottom of the water area, its effect is still limited and cannot completely eliminate the negative impact caused by the sinking of the support plate 20.

[0034] In order to solve this technical problem, the present embodiment sets a support structure 3 on both sides of the outer shell 1 of the sewage pump. The support structure 3 consists of three parts: first, the extension plates 30 set on both sides of the shell 1, which serve as the main part of the support structure 3 and provide a solid foundation for subsequent support and abutment; second, the support plates 31 set at the end of the extension plate 30 away from the shell 1 and extending downward, which act as a bracket and provide additional support for the sewage pump; finally, the abutment plates 32 set at the end of the support plate 31 away from the extension plate 30 and extending laterally, the abutment plates 32 are located below the support plate 20, and when the sewage pump is placed in the water area, they will first contact the bottom surface of the water area to provide preliminary support for the sewage pump.

[0035] It is the setting of this supporting structure 3 that enables the abutment plate 32 to bear part of the gravity first during the placement of the sewage pump, thereby reducing the direct pressure on the support plate 20. In this way, even if the bottom of the water area is soft, the support plate 20 can be effectively buffered when it sinks, avoiding the situation where the lower end of the water inlet gap 22 is blocked due to excessive sinking, thereby affecting the pumping efficiency of the sewage pump. It can be said that the setting of the supporting structure 3 not only enhances the stability of the sewage pump during the installation process, but also further improves its pumping efficiency, ensuring the efficient operation of the sewage pump in various complex environments.

[0036] Although the setting of the support structure 3 effectively solves the problem that the support plate 20 sinks too much and affects the pumping efficiency of the sewage pump, this design also brings some possible technical problems. Specifically, the setting of the support structure 3 significantly increases the storage area of ​​the housing 1 of the sewage pump, thereby affecting the overall storage convenience and transportation efficiency of the sewage pump. In order to solve this technical problem, the present embodiment provides storage grooves 10 for storing the support structure 3 on both sides of the outer shell 1 of the sewage pump.

[0037] In order to further improve the convenience of storage, a folding structure 4 is also provided on the support structure 3. This structure allows the support structure 3 to be easily folded up when not in use, thereby greatly reducing the space required for storage. The specific implementation of the folding structure 4 includes: a storage groove 40 for storing the support plate 31 is provided on the bottom surface of the extension plate 30. This setting allows the support plate 31 to fit tightly in the bottom surface of the extension plate 30 when not in use, without occupying additional space; at the same time, a storage opening 41 for storing the abutment plate 32 is provided on the support plate 31. This design ensures that the abutment plate 32 can also be stored, and will not affect the overall storage effect of the sewage pump.

[0038] One end of the extension plate 30 is located at the upper end of the storage slot 10, and is rotatably connected to the housing 1, so that the extension plate 30 can be easily rotated in the storage slot 10, thereby switching between the storage and deployment states. The support plate 31 adopts a telescopic plate design, one end of which is located in the storage groove 40, and is also rotatably connected to the extension plate 30, so that the support plate 31 can be telescopically adjusted as needed, further improving the storage flexibility.

[0039] One end of the abutment plate 32 is located at the lower end of the storage opening 41, and is also connected to the support plate 31 by rotation. This design allows the abutment plate 32 to be easily stored in the storage opening 41 in the support plate 31 without affecting the overall appearance and storage effect of the sewage pump.

[0040] In addition, in order to ensure that the supporting plate 31 can maintain sufficient supporting force during the extension and retraction process, a supporting spring is also provided in the supporting plate 31. This design not only makes the supporting plate 31 more smoothly when extending and retracting, but also ensures that the supporting plate 31 will not be easily shortened due to external forces in the stored state, thereby ensuring the stability and reliability of the supporting structure 3 when in use.

[0041] By setting the folding structure 4, after the sewage pump is used, the abutment plate 32, the support plate 31 and the extension plate 30 can be easily rotated to store them in the storage opening 41, the storage groove 40 and the storage slot 10, so that the support structure 3 does not affect the storage area of ​​the housing 1 when not in use. In this way, the sewage pump can not only maintain efficient and stable pumping efficiency when in use, but also be more convenient and efficient during storage and transportation.

[0042] Although the setting of the folding structure 4 successfully solves the problem that the supporting structure 3 affects the storage area of ​​the housing 1, making the sewage pump more convenient to store and transport, it also brings a new problem. During the use of the supporting structure 3, when the sewage pump is subjected to a large vibration, the abutment plate 32 and the supporting plate 31 may rotate due to the action of external force, causing the sewage pump to lose the stable support of the supporting structure 3. In order to solve this technical problem, the supporting structure 3 is further improved in this embodiment.

[0043] Specifically, the present embodiment adds a first limiting structure at the rotational connection between the support plate 31 and the extension plate 30. The main function of this structure is to prevent the support plate 31 from rotating during use. The specific implementation of the first limiting structure is that the present embodiment provides a support spring 5 at the angle between the support plate 31 and the extension plate 30. One end of the support spring 5 is fixedly connected to the extension plate 30, and the other end is fixedly connected to the support plate 31. In this way, when the support structure 3 is subjected to external force, the support spring 5 can provide sufficient elastic force to ensure that the support plate 31 remains in a predetermined position and does not rotate due to vibration.

[0044] At the same time, in order to further improve the stability of the support structure 3, the present embodiment also adds a second limiting structure 6 at the lower end of the support plate 31 and the upper surface of the abutment plate 32. The main function of this structure is to prevent the abutment plate 32 from rotating during use. The specific implementation method of the second limiting structure 6 is that the present embodiment rotatably sets a limiting plate 60 at the lower end of the support plate 31, and a limiting groove 61 is provided on the abutment plate 32. When the support structure 3 needs to be used, we can first rotate the abutment plate 32 to a downwardly inclined state, and then rotate the limiting plate 60 to make it also rotate downwardly inclined. Next, rotate the abutment plate 32 again, so that the limiting groove 61 gradually approaches the limiting plate 60, and finally the limiting plate 60 is inserted into the limiting groove 61. In this way, the cooperation between the limiting plate 60 and the limiting groove 61 effectively limits the rotation of the abutment plate 32, thereby ensuring the stability of the support structure 3.

[0045] In addition, the provision of the support spring 5 can also ensure that the support plate 31 can always remain in a vertical state during use, further preventing it from rotating and folding. A receiving groove 42 for accommodating the limiting plate 60 is provided on the upper surface of the abutment plate 32, and the limiting groove 61 is provided in the receiving groove 42. When the support structure 3 needs to be folded, the receiving groove 42 provided on the abutment plate 32 can play an important role. The provision of the receiving groove 42 enables the limiting plate 60 to be properly stored when the abutment plate 32 rotates and folds, thereby not affecting the folding process of the abutment plate 32.

[0046] By setting the first limiting structure and the second limiting structure 6, the stability of the support structure 3 during use is significantly improved. Even if the sewage pump is subjected to large vibrations, the support structure 3 can maintain a stable supporting state, thereby ensuring the normal operation of the sewage pump. At the same time, the design of the receiving groove 42 also allows the support structure 3 to be easily folded up when not in use, which will not affect the storage and transportation of the sewage pump.

[0047] Although the provision of the first limiting structure and the second limiting structure 6 improves the stability of the supporting structure 3 during use, the supporting spring will always press the supporting plate 31 in a vertical state, and the elastic force of the supporting spring will not disappear when the supporting plate 31 is folded. This results in that when the entire supporting structure 3 is folded up and stored in the storage slot 10, the elastic force of the supporting spring will cause the supporting structure 3 to rotate out of the storage slot 10, making it very inconvenient to keep the supporting structure 3 pressed when it is stored. In order to solve this technical problem, In order to solve the problem, the present embodiment provides a protective structure 7 for preventing the supporting structure 3 from escaping from the storing slot 10 directly above the storing slot 10. The protective structure 7 includes a U-shaped frame 70 fixedly arranged on the outer shell 1 and a protective plate 71 plugged into the U-shaped frame 70. The protective plate 71 is used to cover the entire storing slot 10. When the entire supporting structure 3 is folded up and stored in the storing slot 10, the protective plate 71 is pushed to cover the entire storing slot 10, thereby restricting the supporting structure 3 in the storing slot 10, making it more convenient to store the supporting structure 3.

[0048] Specific implementation process: first pull the protective plate 71 upwards, then retract the protective plate 71, and then rotate the extension plate 30 to stretch the support structure 3, so that the supporting bending spring 5 is vertically pressed against the support plate 31, and then rotate the abutment plate 32 to be tilted downward, and then rotate the limit plate 60 to be tilted downward, and then rotate the abutment plate 32 to make the limit groove 61 approach the limit plate 60, so that the limit plate 60 is inserted into the limit groove 61 to limit the rotation of the abutment plate 32, and then put the sewage pump as a whole into the water area to pump water. During the pumping process, the protective circular plate 21 rotates with the output end of the driving motor, so that the spiral plate 24 inside the protective circular plate 21 accelerates the flow of water into the pumping structure and stirs the sludge to make it easier to be pumped.

[0049] After the sewage pump is finished working, take out the sewage pump, and then rotate the abutment plate 32 downward so that the limit plate 60 is separated from the abutment plate 32, and then rotate the limit plate 60 to attach to the support plate 31, and then rotate the abutment plate 32 to be stored in the storage opening 41 so that the accommodating groove 42 covers the limit plate 60, and then rotate the support plate 31 to be stored in the storage groove 40, and then rotate the extension plate 30 to be stored in the storage groove 10, and then align the protective plate 71 with the U-shaped frame 70 and insert it so that the protective plate 71 covers the storage groove 10, and the storage of the sewage pump is completed.

[0050] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sewage pump, comprising a housing (1), a pumping structure arranged at the lower end of the housing (1), a driving motor arranged at the upper end of the housing (1) and having an output end connected to the pumping structure, and a water outlet pipe arranged outside the housing (1) and connected to the pumping structure, wherein a water inlet is provided at the lower end of the housing (1), and a cutting blade is provided at the water inlet at the lower end of the housing (1) and rotates with the driving motor. It is characterized in that The outer lower end of the shell (1) is provided with a protective device (2) for preventing stones from being sucked into the water pumping structure.

2. A sewage pump according to claim 1, It is characterized in that The protective device (2) comprises a support plate (20) fixedly arranged on the housing (1) and a protective circular plate (21) coaxially fixedly connected to the output end of the driving motor with the cutting blade, the support plate (20) being circular and having a plurality of water inlet notches (22) formed on its circumference, the protective circular plate (21) being located inside the support plate (20) and having a circumferential surface in contact with the support plate (20), the protective circular plate (21) being located in the middle of the water inlet notch (22), and the circumferential surface of the protective circular plate (21) blocking most of the area of ​​the water inlet notch (22).

3. A sewage pump according to claim 2, It is characterized in that The bottom surface of the protective circular plate (21) is provided with a circular opening (23) penetrating to the upper surface of the protective circular plate (21), and an acceleration component for accelerating the flow of water is arranged in the circular opening (23), and the acceleration component includes a spiral plate (24) fixedly arranged in the protective circular plate (21) and arranged along the height direction of the circular opening (23).

4. A sewage pump according to claim 1, It is characterized in that Support structures (3) for supporting the sewage pump and preventing the sewage pump from sinking are provided on both sides of the exterior of the housing (1).

5. A sewage pump according to claim 4, It is characterized in that The support structure (3) comprises an extension plate (30) arranged on both sides of the outer shell (1), a support plate (31) arranged at one end of the extension plate (30) away from the outer shell (1) and extending downward, and an abutment plate (32) arranged at one end of the support plate (31) away from the extension plate (30) and extending laterally, wherein the abutment plate (32) is located below the support plate (20).

6. A sewage pump according to claim 5, It is characterized in that The outer sides of the shell (1) are provided with receiving grooves (10) for receiving the supporting structure (3); the supporting structure (3) is provided with a folding structure (4) for folding the supporting structure (3); the folding structure (4) comprises a receiving groove (40) provided on the bottom surface of the extension plate (30) for receiving the supporting plate (31); and a receiving opening (41) provided on the supporting plate (31) for receiving the abutting plate (32); one end of the extension plate (30) is located at the upper end of the receiving groove (10) and is rotatably connected to the shell (1); the supporting plate (31) is a telescopic plate and one end of the supporting plate (31) is located in the receiving groove (40) and is rotatably connected to the extension plate (30); one end of the abutting plate (32) is located at the lower end of the receiving opening (41) and is rotatably connected to the supporting plate (31); and a supporting spring for preventing the supporting plate (31) from shortening is provided in the supporting plate (31).

7. A sewage pump according to claim 5, It is characterized in that A first limiting structure for preventing the supporting plate (31) from rotating during use is provided at the position where the supporting plate (31) is rotatably connected to the extension plate (30), and a second limiting structure (6) for preventing the abutting plate (32) from rotating during use is provided at the lower end of the supporting plate (31) and the upper surface of the abutting plate (32).

8. A sewage pump according to claim 7, It is characterized in that The first limiting structure comprises a support bending spring (5) arranged at an angle between the supporting plate (31) and the extension plate (30), one end of the support bending spring (5) is fixedly connected to the extension plate (30), and the other end is fixedly connected to the supporting plate (31), and the second limiting structure (6) comprises a limiting plate (60) rotatably arranged at the lower end of the supporting plate (31) and a limiting groove (61) provided on the abutting plate (32), and one end of the limiting plate (60) away from the supporting plate (31) extends into the limiting groove (61).

9. A sewage pump according to claim 8, It is characterized in that The upper surface of the abutment plate (32) is provided with a receiving groove (42) for receiving the limiting plate (60), and the limiting groove (61) is located in the receiving groove (42).

10. A sewage pump according to claim 6, It is characterized in that A protective structure (7) for preventing the supporting structure (3) from escaping from the storage slot (10) is provided directly above the storage slot (10); the protective structure (7) comprises a U-shaped frame (70) fixedly arranged on the outer shell (1) and a protective plate (71) plugged into the U-shaped frame (70); the protective plate (71) is used to cover the entire storage slot (10).

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