Dual-purpose pump for cleaning sewage

Abstract

The present application belongs to the technical field of water pump, and relates to a sewage and clean water dual-purpose pump, which comprises a pump body, a supporting seat arranged at the bottom of the pump body, a base slidably arranged below the supporting seat, a clean water inlet arranged at the bottom of the base, a side wall of the base provided with a sewage inlet, the base being axially slidable and switchable between a clean water mode and a sewage mode, a sliding assembly arranged on the base and the supporting seat and matched with each other, a first set of limiting structures and a second set of limiting structures arranged on the sliding assembly and matched with each other, a pedal assembly arranged on the base, and a driving member arranged between the pedal assembly and the base, the driving member being used to form a locking structure on the pedal assembly in the sewage mode, and the pedal assembly being pressed to unlock the locking structure when switching. The sewage and clean water dual-purpose pump provided by the present application has a simpler structure and can be more conveniently switched between different modes.

Description

Technical Field

[0001] This invention belongs to the technical field of water pumps and relates to a dual-purpose pump for cleaning and sewage disposal. Background Technology

[0002] Submersible pumps can generally be divided into sewage pumps and clean water pumps, and the two types of pumps have different requirements for the particles in the influent. Sewage pumps have a larger inlet diameter, which allows for the flow of influent water containing relatively large particles, but therefore they are not suitable for applications requiring particle filtration. In this case, the user needs to switch to a clean water pump, but clean water pumps, due to their smaller inlet diameter, cannot pump water containing large particles. To save on operating costs, engineers have developed a dual-purpose (sewage and clean water) pump.

[0003] Chinese invention patent application CN112302961A (publication date 2021-02-02) discloses a submersible pump capable of switching between sewage and clean water extraction. It includes a fixedly connected housing and a base. A motor is housed within the housing, and a motor-driven impeller is housed within the base. A water inlet channel is located at the bottom of the base, and a base plate is slidably mounted within the base. Several water inlets communicating with the water inlet channel are provided around the side wall of the base or base plate. The base and base plate are supported by elastic elements. Limiting buckles and elastic pull buckles are respectively provided on the base and base plate. The limiting buckles have several limiting grooves of different heights, and the elastic pull buckles cooperate with the limiting grooves and can switch between different limiting grooves.

[0004] Although the above-mentioned submersible pump can be used for both cleaning and sewage treatment, its multi-speed switching structure is relatively complex and its assembly is also quite troublesome. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a dual-purpose pump for cleaning and sewage, which has a simpler structure and allows for easier switching of pump usage modes.

[0006] To solve the above-mentioned technical problems, the objective of this invention is achieved through the following technical solution:

[0007] A dual-purpose pump for cleaning and sewage includes a pump body, a support base is provided at the bottom of the pump body, a base is slidably provided below the support base, a clean water inlet is provided at the bottom of the base and a sewage inlet is provided on the side wall, and the base slides along the axial direction and switches between clean water mode and sewage mode.

[0008] The base and the support are respectively provided with mutually cooperating sliding components. The sliding components are provided with a first set of limiting structures and a second set of limiting structures for cooperating and limiting. The first set of limiting structures limits the base in the clean water mode, and the second set of limiting structures limits the base in the sewage mode.

[0009] A pedal assembly is provided on the base, and a driving component is provided between the pedal assembly and the base. In sewage mode, the driving component acts on the pedal assembly to form a locking structure. When switching, stepping on the pedal assembly unlocks the locking structure.

[0010] This invention also provides a pedal-operated pump for both cleaning and sludge removal:

[0011] In the above-mentioned dual-purpose pump for cleaning and sewage, the sliding assembly includes: a plurality of first sliding plates arranged circumferentially below the support base and a plurality of second sliding plates arranged circumferentially above the base. The bottom of the first sliding plate is provided with a first protrusion, the bottom of the second sliding plate is provided with a second protrusion, and the top of the second sliding plate is provided with a third protrusion. The second protrusion cooperates with the first protrusion to form a first set of limiting structures, and the third protrusion cooperates with the first protrusion to form a second set of limiting structures.

[0012] In the aforementioned dual-purpose pump for cleaning and sewage, the locking structure further includes: a first locking plate disposed below the support base; a pedal assembly including a flip plate hinged to the base and an upwardly extending second locking plate; a driving member disposed on the outside of the hinge shaft and driving the pedal assembly to rotate inward; and the second locking plate disposed on the inside of the hinge shaft. In sewage mode, the upper end of the second locking plate abuts against the lower end of the first locking plate to form a locking structure. In clean water mode, the second locking plate is housed between the first locking plate and the pump body.

[0013] Preferably, the first locking plate and the second locking plate are provided with mutually cooperating inclined surfaces, which are inclined from top to bottom and inward, and the two inclined surfaces abut against each other when locked.

[0014] Preferably, the pedal assembly is provided in pairs, located on the left and right sides of the base respectively, the flip plate extends beyond the base, and the two sides of the base extend outward to form base plates corresponding to the flip plate.

[0015] Preferably, the distance by which the second protrusion extends inward is less than the distance by which the third protrusion extends inward.

[0016] Preferably, the first and second skateboards are made of elastic material.

[0017] This invention also provides an internal pressure dual-purpose pump for cleaning and decontamination:

[0018] In the above-mentioned dual-purpose pump for cleaning and sewage, the locking structure includes: a first locking plate disposed below the support base; a pedal assembly including a sliding plate disposed radially on the base and a second locking plate extending upward; a driving member driving the pedal assembly to move outward; a limiting block disposed on the base to restrict the sliding stroke of the sliding plate; in sewage mode, the upper end of the second locking plate abuts against the lower end of the first locking plate to form a locking structure; in clean water mode, the second locking plate is housed inside the second locking plate.

[0019] This invention also provides a pedal-operated pump for both cleaning and sludge removal:

[0020] In the aforementioned dual-purpose pump for cleaning and sewage treatment, the sliding assembly includes: a plurality of first connecting rods circumferentially disposed below the support base and a plurality of second connecting rods circumferentially disposed above the base. The first connecting rods and the second connecting rods are arranged in pairs with a gap, and the second connecting rod is located inside the first connecting rod. The top of the inner side of the first connecting rod is provided with a first slot and the bottom is provided with a second slot. The top of the outer side of the second connecting rod is provided with a first locking head. The first locking head and the first slot cooperate to form a first set of limiting structures, and the first locking head and the second slot cooperate to form a second set of limiting structures.

[0021] In the aforementioned dual-purpose pump for cleaning and sewage, the locking structure further includes: the pedal assembly includes a ring-shaped pedal ring, with several connecting sleeves above the pedal ring; several connecting posts are provided above the base; the connecting sleeves are fitted onto the connecting posts to form a sliding structure; the driving component is disposed between the connecting sleeves and the connecting posts and drives them to move in opposite directions; several upwardly extending locking rods are provided circumferentially on the pedal ring; a locking head extending inward is provided at the top of the inner side of the second connecting rod; the locking rods are inserted into the gap of the second connecting rod and abut against the locking head to form a locking structure.

[0022] In the aforementioned dual-purpose pump for cleaning and sewage, the locking head further includes a primary locking head and a secondary locking head with a stepped structure. The primary locking head is connected to the inner side of the second connecting rod through a guide slope. In the locked state, the outer side of the locking rod abuts against the inner side of the primary locking head, and the upper end face abuts against the lower end face of the secondary locking head.

[0023] In the aforementioned dual-purpose cleaning and decontamination pump, further, the inner side of the first connecting rod below the second slot is located on the first plane, and the inner side of the first connecting rod above the second slot is located on the second plane, with the first plane located inside the second plane; the outer side of the second connecting rod below the first clamp is located on the third plane, and the outer side of the second connecting rod above the first clamp is located on the fourth plane, with the third plane located inside the fourth plane.

[0024] Preferably, the two sides of the pedal ring extend outward to form a pedal pressing part.

[0025] Preferably, both the first connecting rod and the second connecting rod are made of elastic material.

[0026] In the aforementioned dual-purpose pump for cleaning and sewage disposal, the driving component is either a spring or a magnet. When the driving component is a spring, both ends of the spring abut against the two driven components respectively; when the driving component is a magnet, a magnet is disposed on each of the two driven components, and the polarities of the two magnets repel each other.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. This invention provides a dual-purpose pump for both cleaning and wastewater use. A support frame is installed within the pump body to mount a sliding base, and the operating mode is switched by the axial sliding of the base. Simultaneously, two sets of limiting structures are added between the support frame and the base, corresponding to the clean water mode and the wastewater mode respectively. A pedal assembly is used for locking and unlocking. This allows the base to be stably positioned in either the clean water or wastewater mode while also enabling convenient unlocking and switching.

[0029] 2. The cleaning / sludge switching structure provided by this invention does not change the basic structure of the pump body and can be widely used in submersible pumps on the market, exhibiting excellent adaptability. This invention further provides multiple switching structures, which can be selected according to the pump specifications, further improving product adaptability. Attached Figure Description

[0030] Figure 1 This is a perspective view of the wastewater model in Embodiment 1 of the present invention;

[0031] Figure 2 yes Figure 1 A sectional view;

[0032] Figure 3 yes Figure 1 A 3D view after removing the pump body;

[0033] Figure 4 This is a perspective view of the water purification mode in Embodiment 1 of the present invention;

[0034] Figure 5 yes Figure 4 A sectional view;

[0035] Figure 6 yes Figure 4 A 3D view after removing the pump body;

[0036] Figure 7 This is a perspective view of the wastewater model in Embodiment 2 of the present invention;

[0037] Figure 8 yes Figure 7 A 3D view after removing the pump body;

[0038] Figure 9 yes Figure 8 A sectional view;

[0039] Figure 10 This is a perspective view of the water purification mode in Embodiment 2 of the present invention;

[0040] Figure 11 yes Figure 10 A 3D view after removing the pump body;

[0041] Figure 12 yes Figure 11 A sectional view;

[0042] Reference numerals: 1. Pump body; 2. Support base; 3. Base; 4. Clean water inlet; 5. Sewage inlet; 6. Pedal assembly; 7. Drive component; 8. First sliding plate; 9. Second sliding plate; 10. First protrusion; 11. Second protrusion; 12. Third protrusion; 13. First locking plate; 14. Flip plate; 15. Second locking plate; 16. Hinge shaft; 17. First connecting rod; 18. Second connecting rod; 19. First slot; 20. Second slot; 21. First locking head; 22. Pedal ring; 23. Connecting sleeve; 24. Connecting column; 25. Locking rod; 26. Locking head. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-12 :

[0044] Example 1

[0045] Pedal-operated cleaning and sewage pump

[0046] Comparison Appendix Figure 1-6 A dual-purpose pump for cleaning and sewage includes a pump body 1, a support base 2 at the bottom of the pump body 1, a base 3 slidably disposed below the support base 2, a clean water inlet 4 at the bottom of the base 3 and a sewage inlet 5 on the side wall, the base 3 sliding along the axial direction and switching between clean water mode and sewage mode.

[0047] The base 3 and the support 2 are respectively provided with mutually cooperating sliding components. The sliding components are provided with a first set of limiting structures and a second set of limiting structures for cooperating and limiting. The first set of limiting structures limits the base 3 in the clean water mode, and the second set of limiting structures limits the base 3 in the sewage mode.

[0048] A pedal assembly 6 is provided on the base 3, and a driving component 7 is provided between the pedal assembly 6 and the base 3. In sewage mode, the driving component 7 acts on the pedal assembly 6 to form a locking structure. When switching, stepping on the pedal assembly 6 unlocks the locking structure. In this embodiment, the driving component 7 is a spring.

[0049] In this embodiment, the sliding assembly includes: several first sliding plates 8 circumferentially disposed below the support base 2 and several second sliding plates 9 circumferentially disposed above the base 3. The bottom of the first sliding plate 8 is provided with a first protrusion 10, the bottom of the second sliding plate 9 is provided with a second protrusion 11, and the top of the second sliding plate 9 is provided with a third protrusion 12. The second protrusion 11 and the first protrusion 10 cooperate to form a first set of limiting structures, and the third protrusion 12 and the first protrusion 10 cooperate to form a second set of limiting structures. In this embodiment, a total of five sets of sliding assemblies are provided.

[0050] In this embodiment, the locking structure includes: a first locking plate 13 disposed below the support base 2; the pedal assembly 6 includes a flip plate 14 hinged to the base 3 and an upwardly extending second locking plate 15; the driving member 7 is disposed on the outside of the hinge shaft 16 and drives the pedal assembly 6 to rotate inward; the second locking plate 15 is disposed on the inside of the hinge shaft 16; in sewage mode, the upper end of the second locking plate 15 abuts against the lower end of the first locking plate 13 to form a locking structure; in clean water mode, the second locking plate 15 is housed between the first locking plate 13 and the pump body 1.

[0051] The working process of this embodiment is as follows:

[0052] Switching from clean water mode to wastewater mode: Place the water pump on the ground, step on the flip plate 14, and then lift the pump body 1. When subjected to external force, the first protrusion 10 moves upward past the second protrusion 11. Continue moving the pump body 1 until the first protrusion 10 contacts the third protrusion 12. At this point, remove the foot pressing on the flip plate 14. Driven by the drive component 7, the flip plate 14 rotates inward around the hinge shaft 16. The second locking plate 15 rotates to a position where it contacts the first locking plate 13, forming a locking structure, thus completing the switch. In wastewater mode, larger particles in the water can enter the water pump through the wastewater inlet 5 on the side.

[0053] Switching from wastewater mode to clean water mode: Place the water pump on the ground, step on the flip plate 14, the flip plate 14 rotates outward and drives the second locking plate 15 to rotate outward, the second locking plate 15 disengages from the first locking plate 13, the locking state is released, then push the pump body 1 downward until the first protrusion 10 passes over the second protrusion 11 from above to complete the switch. In clean water mode, clean water enters through the clean water inlet 4 at the bottom.

[0054] In this embodiment, a mutually cooperating inclined surface is provided between the first locking plate 13 and the second locking plate 15. The inclined surface slopes inward from top to bottom, and in the locked state, the two inclined surfaces abut against each other. The above-mentioned inclined surface structure can be adapted to the inclined structure of the second locking plate 15 to form a more stable support structure. At the same time, the inclined structure facilitates the outward rotation of the second locking plate 15, making it easier to release the locking state.

[0055] In this embodiment, a pair of pedal assemblies 6 are provided, located on the left and right sides of the base 3 respectively. The flip plate 14 extends beyond the base 3, and the two sides of the base 3 respectively extend outward to form base plates corresponding to the flip plate 14.

[0056] Preferably, the inward extension distance of the second protrusion 11 is less than the inward extension distance of the third protrusion 12. By providing a more prominent third protrusion 12, it is possible to prevent the first protrusion 10 from passing over the third protrusion 12 when the pump body 1 is pulled to the top, thus preventing the base 3 from coming off.

[0057] Preferably, the first skateboard 8 and the second skateboard 9 are made of elastic material.

[0058] Example 2

[0059] Pedal-type dual-purpose pump for cleaning and decontamination

[0060] Comparison Appendix Figure 7-12 A dual-purpose pump for cleaning and sewage includes a pump body 1, a support base 2 at the bottom of the pump body 1, a base 3 slidably disposed below the support base 2, a clean water inlet 4 at the bottom of the base 3 and a sewage inlet 5 on the side wall, the base 3 sliding along the axial direction and switching between clean water mode and sewage mode.

[0061] The base 3 and the support 2 are respectively provided with mutually cooperating sliding components. The sliding components are provided with a first set of limiting structures and a second set of limiting structures for cooperating and limiting. The first set of limiting structures limits the base 3 in the clean water mode, and the second set of limiting structures limits the base 3 in the sewage mode.

[0062] A pedal assembly 6 is provided on the base 3, and a driving component 7 is provided between the pedal assembly 6 and the base 3. In sewage mode, the driving component 7 acts on the pedal assembly 6 to form a locking structure. When switching, stepping on the pedal assembly 6 unlocks the locking structure. In this embodiment, the driving component 7 is a spring.

[0063] In this embodiment, the sliding assembly includes: a plurality of first connecting rods 17 circumferentially disposed below the support base 2 and a plurality of second connecting rods 18 circumferentially disposed above the base 3. The first connecting rods 17 and the second connecting rods 18 are arranged in pairs with a gap, and the second connecting rods 18 are located inside the first connecting rods 17. The top of the inner side of the first connecting rod 17 is provided with a first slot 19 and the bottom is provided with a second slot 20. The top of the outer side of the second connecting rod 18 is provided with a first locking head 21. The first locking head 21 and the first slot 19 cooperate to form a first set of limiting structures, and the first locking head 21 and the second slot 20 cooperate to form a second set of limiting structures.

[0064] In this embodiment, the locking structure includes: the pedal assembly 6 includes a ring-shaped pedal ring 22, a plurality of connecting sleeves 23 are provided above the pedal ring 22, a plurality of connecting posts 24 are provided above the base 3, the connecting sleeves 23 are sleeved on the connecting posts 24 to form a sliding structure, the driving member 7 is disposed between the connecting sleeves 23 and the connecting posts 24 and drives them to move in opposite directions, the pedal ring 22 is circumferentially provided with a plurality of upwardly extending locking rods 25, the top of the inner side of the second connecting rod 18 is provided with an inwardly extending locking head 26, the locking rod 25 is inserted into the gap of the second connecting rod 18 and abuts against the locking head 26 to form a locking structure.

[0065] The working process of this embodiment is as follows:

[0066] Switching from clean water mode to wastewater mode: Place the water pump on the ground and press down on the foot pedal 22. The foot pedal 22 moves downward, and the locking rod 25 moves downward accordingly. The end of the locking rod 25 disengages from the locking head 26, allowing the second connecting rod 18 to release its lock and undergo inward elastic deformation. Lift the pump body 1. When subjected to external force, the first locking head 21 disengages from the first locking groove 19 and moves downward. After being lifted into position, the first locking head 21 and the second locking groove 20 form a locking structure. Release the foot pedal 22, and the driving component 7 drives the foot pedal 22 to move upward. The locking rod 25 moves upward accordingly, and the end of the locking rod 25 enters the gap between the locking heads 26, preventing the second connecting rod 18 from undergoing inward elastic deformation, thus forming a locking structure and completing the switch. In wastewater mode, larger particles in the water can enter the water pump through the side wastewater inlet 5.

[0067] Switching from wastewater mode to clean water mode: Place the water pump on the ground and step on the foot ring 22. The foot ring 22 moves downward, and the locking rod 25 moves downward accordingly. The end of the locking rod 25 disengages from the locking head 26, causing the second connecting rod 18 to unlock and undergo inward elastic deformation, pushing the pump body 1 downward. When subjected to external force, the first head 21 disengages from the second slot 20 and moves upward. After reaching its position, the first head 21 and the first slot 19 form a locking structure. Release the foot ring 22, and the driving component 7 drives the foot ring 22 to move upward. The locking rod 25 moves upward accordingly, and the end of the locking rod 25 enters the gap between the locking heads 26, preventing the second connecting rod 18 from undergoing inward elastic deformation, forming a locking structure, and completing the switch. In clean water mode, clean water enters through the clean water inlet 4 at the bottom.

[0068] In this embodiment, the locking head 26 includes a primary locking head and a secondary locking head with a stepped structure. The primary locking head is connected to the inner side of the second connecting rod 18 via a guide slope. In the locked state, the outer side of the locking rod 25 abuts against the inner side of the primary locking head, and the upper end face abuts against the lower end face of the secondary locking head. The primary locking head, secondary locking head, and guide slope prevent excessive movement of the locking rod 25 and better guide the locking rod 25 into the gap between the locking heads 26.

[0069] In this embodiment, the inner side of the first connecting rod 17 below the second slot 20 is located on a first plane, and the inner side of the first connecting rod 17 above the second slot 20 is located on a second plane, with the first plane located inside the second plane; the outer side of the second connecting rod 18 below the first clamping head 21 is located on a third plane, and the outer side of the second connecting rod 18 above the first clamping head 21 is located on a fourth plane, with the third plane located inside the fourth plane. The more protruding end prevents the base 3 from detaching from the water pump during downward movement.

[0070] Preferably, the two sides of the pedal ring 22 extend outward to form a pedal pressing part.

[0071] Preferably, both the first connecting rod 17 and the second connecting rod 18 are made of elastic material.

[0072] Example 3

[0073] Internal pressure cleaning and decontamination pump

[0074] Example 3 has a structure that is roughly the same as Example 1, but has a different locking structure. In this example, the locking structure includes: a first locking plate 13 is provided below the support base 2; the pedal assembly 6 includes a sliding plate that slides radially on the base 3 and a second locking plate 15 that extends upward; the driving member 7 drives the pedal assembly 6 to move outward; and a limiting block is provided on the base 3 to limit the sliding stroke of the sliding plate. In sewage mode, the upper end of the second locking plate 15 abuts against the lower end of the first locking plate 13 to form a locking structure; in clean water mode, the second locking plate 15 is housed inside the second locking plate 15.

[0075] In this embodiment, the driving component 7 is a spring. When switching from sewage mode to clean water mode, the sliding plate is pressed inward, and the second locking plate 15 moves inward and disengages from the first locking plate 13, thus releasing the locking state. When switching from clean water mode to sewage mode, after the pump body 1 is lifted into place, the spring drives the sliding plate to slide outward, and the second locking plate 15 slides outward accordingly. After moving to the relative position of the first locking plate 13, it abuts against it to form a locking structure.

[0076] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A dual-purpose pump for cleaning and sewage disposal, comprising a pump body (1), characterized in that, The pump body (1) is provided with a support base (2) at the bottom, and a base (3) is slidably provided below the support base (2). The base (3) is provided with a clean water inlet (4) at the bottom and a sewage inlet (5) on the side. The base (3) slides along the axis and switches between clean water mode and sewage mode. The base (3) and the support (2) are respectively provided with mutually cooperating sliding components. The sliding components are provided with a first set of limiting structures and a second set of limiting structures for cooperating and limiting. The first set of limiting structures limits the base in the clean water mode, and the second set of limiting structures limits the base in the sewage mode. A pedal assembly (6) is provided on the base, and a driving component (7) is provided between the pedal assembly (6) and the base (3). In sewage mode, the driving component (7) acts on the pedal assembly to form a locking structure. When switching, stepping on the pedal assembly unlocks the locking structure. The locking structure includes: A first locking plate (13) is provided below the support base (2). The pedal assembly includes a flip plate (14) hinged to the base and a second locking plate (15) extending upward. The driving member (7) is located outside the hinge shaft (16) and drives the pedal assembly (6) to rotate inward. The second locking plate (15) is located inside the hinge shaft (16). In sewage mode, the upper end of the second locking plate (15) abuts against the lower end of the first locking plate (13) to form a locking structure. In clean water mode, the second locking plate (15) is housed between the first locking plate (13) and the pump body (1). Alternatively, a first locking plate (13) is provided below the support base (2), and the pedal assembly (6) includes a sliding plate that slides radially on the base (3) and a second locking plate (15) that extends upward. The driving member (7) drives the pedal assembly (6) to move outward. A limiting block is provided on the base (3) to limit the sliding stroke of the sliding plate. In sewage mode, the upper end of the second locking plate (15) abuts against the lower end of the first locking plate (13) to form a locking structure. In clean water mode, the second locking plate (15) is housed inside the first locking plate (13).

2. The dual-purpose pump for cleaning and sewage disposal according to claim 1, characterized in that, The sliding assembly includes: a plurality of first sliding plates (8) arranged circumferentially below the support base (2) and a plurality of second sliding plates (9) arranged circumferentially above the base (3). The bottom of the first sliding plate (8) is provided with a first protrusion (10), the bottom of the second sliding plate (9) is provided with a second protrusion (11), and the top is provided with a third protrusion (12). The second protrusion (11) and the first protrusion (10) cooperate to form a first set of limiting structures, and the third protrusion (12) and the first protrusion (10) cooperate to form a second set of limiting structures.

3. The dual-purpose pump for cleaning and sewage disposal according to claim 2, characterized in that, The first locking plate (13) and the second locking plate (15) are provided with mutually cooperating inclined surfaces. The inclined surfaces are inclined from top to bottom and inward. When locked, the two inclined surfaces abut against each other.

4. A dual-purpose pump for cleaning and sewage disposal, comprising a pump body (1), characterized in that, The pump body (1) is provided with a support base (2) at the bottom, and a base (3) is slidably provided below the support base (2). The base (3) is provided with a clean water inlet (4) at the bottom and a sewage inlet (5) on the side. The base (3) slides along the axis and switches between clean water mode and sewage mode. The base (3) and the support (2) are respectively provided with mutually cooperating sliding components. The sliding components are provided with a first set of limiting structures and a second set of limiting structures for cooperating and limiting. The first set of limiting structures limits the base in the clean water mode, and the second set of limiting structures limits the base in the sewage mode. A pedal assembly (6) is provided on the base, and a driving component (7) is provided between the pedal assembly (6) and the base (3). In sewage mode, the driving component (7) acts on the pedal assembly to form a locking structure. When switching, stepping on the pedal assembly unlocks the locking structure. The sliding assembly includes: a plurality of first connecting rods (17) arranged circumferentially below the support base (2) and a plurality of second connecting rods (18) arranged circumferentially above the base (3). The first connecting rods (17) and the second connecting rods (18) are arranged in pairs with a gap, and the second connecting rods (18) are located inside the first connecting rods (17). The top of the inner side of the first connecting rod (17) is provided with a first slot (19) and the bottom is provided with a second slot (20). The top of the outer side of the second connecting rod (18) is provided with a first locking head (21). The first locking head (21) and the first slot (19) cooperate to form a first set of limiting structures, and the first locking head (21) and the second slot (20) cooperate to form a second set of limiting structures. The locking structure includes: the pedal assembly (6) includes a ring-shaped pedal ring (22), a plurality of connecting sleeves (23) are provided above the pedal ring (22), a plurality of connecting posts (24) are provided above the base (3), the connecting sleeves (23) are sleeved on the connecting posts (24) to form a sliding structure, the driving member (7) is provided between the connecting sleeves (23) and the connecting posts (24) and drives them to move in opposite directions, a plurality of upwardly extending locking rods (25) are provided circumferentially on the pedal ring (22), and an inwardly extending locking head (26) is provided on the top of the inner side of the second connecting rod (18), the locking rods (25) are inserted into the gap of the second connecting rod (18) and abut against the locking head (26) to form a locking structure.

5. A dual-purpose pump for cleaning and sewage disposal according to claim 4, characterized in that, The locking head (26) includes a first-level head and a second-level head with a stepped structure. The first-level head is connected to the inner side of the second connecting rod (18) through a guide slope. In the locked state, the outer side of the locking rod (25) abuts against the inner side of the first-level head, and the upper end face abuts against the lower end face of the second-level head.

6. A dual-purpose pump for cleaning and sewage disposal according to claim 4, characterized in that, The inner side of the first connecting rod (17) below the second slot (20) is located on the first plane, and the inner side of the first connecting rod (17) above the second slot (20) is located on the second plane. The first plane is located inside the second plane. The outer side of the second connecting rod (18) below the first card head (21) is located on the third plane, and the outer side of the second connecting rod (18) above the first card head (21) is located on the fourth plane. The third plane is located inside the fourth plane.

7. A dual-purpose pump for cleaning and sewage disposal according to claim 1 or 4, characterized in that, The driving component (7) is a spring or a magnet.

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