A sewage conversion water pump

Abstract

The present invention discloses a clean-sewage conversion water pump, comprising a pump casing, a base, and a pump body. The pump body is fixed within the pump casing, and the base is slidably connected to the bottom end of the pump casing. The base has a clean water drainage position and a sewage drainage position. A clean water-sewage conversion mechanism is provided within the cavity enclosed by the pump casing and the base. The base is connected to the clean water-sewage conversion mechanism and switches between the clean water drainage position and the sewage drainage position under the control of the clean water-sewage conversion mechanism. The operating end of the clean water-sewage conversion mechanism is located in the upper middle portion of the pump casing. The present invention easily switches the water pump between the clean water drainage mode and the sewage drainage mode while avoiding contamination. The structure is simple and effective, and the operation is convenient and quick.

Description

Technical Field

[0001] The present invention relates to a submersible pump, and more particularly to a sewage conversion water pump. Background Art

[0002] Conventional submersible pumps are divided into clean water pumps and sewage pumps. If a user only has a clean water pump, it is only suitable for pumping relatively clear water. For sewage containing large particles or debris, these large particles cannot enter the pump and are removed with the water flow. In this case, the user must purchase a sewage pump that can remove large particles. If a customer only has a sewage pump, because the sewage pump needs to accommodate large particles and debris, the water inlet height is too high. When the water level drops below the water inlet, it cannot pump water, resulting in a high residual water level. A clean and sewage conversion pump combines the advantages of both pumps, allowing a single pump to meet two different needs. For example, utility model patent publication number CN211819924U discloses a clean and sewage dual-purpose submersible pump. This pump uses a rotating base to adjust the distance between the impeller end face and the water inlet, thereby adjusting the size of the submersible pump's water inlet. This allows the pump to be used for both clean water and sewage, making it convenient and practical. However, in this invention, the rotating base is located at a lower position in the submersible pump, where it is often immersed in water and contaminated with sludge, making adjustment difficult and contaminated. Summary of the Invention

[0003] The conversion mechanism on the existing clean-sewage conversion water pump is located low and difficult to keep clean. It needs to directly contact the dirty parts when performing the clean-sewage conversion. To overcome this defect, the present invention provides a clean-sewage conversion water pump that can complete the clean water and sewage working mode conversion without being contaminated by dirt, which is convenient to operate.

[0004] The technical solution of the present invention is: a clean-sewage conversion water pump, comprising a pump casing, a base and a pump body, the pump body being fixed in the pump casing, the base being slidably connected to the bottom end of the pump casing, the base having a clean water drainage level and a sewage drainage level, a clean water-sewage conversion mechanism being provided in the cavity enclosed by the pump casing and the base, the base being connected to the clean water-sewage conversion mechanism, and being converted between the clean water drainage level and the sewage drainage level under the control of the clean water-sewage conversion mechanism, the operating end of the clean water-sewage conversion mechanism being located in the upper middle part of the pump casing. The clean-sewage conversion water pump can convert between the clean water drainage level and the sewage drainage level through the clean water-sewage conversion mechanism. When the base is converted to the clean water drainage level, there is no need to consider the passage of large particles or debris, the water inlet end can be as close to the bottom of the water as possible to reduce the residual water level; when the base is converted to the sewage drainage level, the gap between the base and the bottom end of the pump casing increases, that is, the passing area of ​​the water inlet end is expanded, so that large particles or debris in the sewage can pass through. Since the operating end of the clean water and sewage conversion mechanism is located in the upper middle part of the pump casing, there is no need to touch the dirty bottom of the pump casing when switching between the clean water drainage and sewage drainage working modes, so it is easier to operate.

[0005] Preferably, the clean water / sewage conversion mechanism includes a pressing member, a moving block, a limiting ring, and a base spring. The pressing member is connected to the pump housing and is in transmission connection with the moving block. The limiting ring is axially positioned on the pump housing. The limiting ring is provided with a disconnection portion. The two ends of the limiting ring are butted at the disconnection portion. The moving block is inserted between the two ends of the limiting ring. The limiting ring is controlled by the moving block to switch between a contracted state and an expanded state. A limiting block is provided on the inner circumference of the limiting ring. When the base is in the clean water drainage position and the sewage drainage position, the limiting ring is in a contracted state. When the clean water / sewage conversion is activated, the limiting ring is in an expanded state, and the base and the limiting block are unlocked. The pressing member is the operating end of the clean water / sewage conversion mechanism. Under normal circumstances, the clean-water conversion pump is in clean-water drainage mode and can only drain clean water. At this time, the base is locked with the limit block, the base is in its closest position to the bottom of the pump casing, and the base spring is also in a compressed and stored state. To switch to sewage drainage mode, force is applied to the push piece, and the force is transmitted to the movable block, which moves the movable block, causing the limit ring to expand. The base and the limit block are unlocked, and the base spring then pushes the base downward, widening the gap between the base and the bottom of the pump casing to its maximum, until the base reaches the sewage drainage level. At this time, the pressure on the push piece is removed, and the limit ring returns to its contracted state. The limit block cooperates with other parts of the base to maintain the gap between the base and the bottom of the pump casing. Similarly, to switch from sewage drainage mode to clean-water drainage mode, force is again applied to the push piece to expand the limit ring again, releasing the engagement between the limit block and the base. Then, force is applied again to bring the base closer to the pump casing, returning it to its original position. Therefore, when the clean-water conversion mode is activated, the limit ring is in an expanded state, and in all other states, the limit ring is in a contracted state.

[0006] Preferably, the moving block is provided with a symmetrical pressure slope in the middle, a symmetrical wedge-shaped groove in the bottom, and an inclined surface at the end that mates with the pressure slope and the wall of the wedge-shaped groove. When the moving block is driven downward by the force from the pressing member, the inclined surfaces of the end, the pressure slope, and the wall of the wedge-shaped groove cooperate to convert the axial thrust of the moving block into lateral thrust, thereby increasing the distance between the two ends of the stop ring and thus achieving expansion of the stop ring.

[0007] Preferably, the base includes a base plate, a guide post, and a locking rod. The guide post and the locking rod are fixed to the base plate. The guide post fits snugly against the inner circumference of the pump casing. The locking rod is provided with a retaining notch into which a retaining block can be inserted. Multiple guide posts are provided, and the guide posts fit snugly against the inner circumference of the pump casing. This allows the base to maintain a stable posture when approaching or moving away from the pump casing. When the retaining ring contracts, the retaining block engages the retaining notch. At this time, the base is locked to the retaining ring via the locking rod, and the gap between the base and the pump casing remains fixed.

[0008] Preferably, a handle is provided on the pump housing, a pressing member is slidably embedded in the handle, a transmission rod is provided between the pressing member and the movable block, the transmission rod is slidably connected to the handle, a return spring is provided between the pressing member and the retaining ring, and the return spring is sleeved on the movable block. The carrying handle facilitates the transportation of the water pump and is generally located at a higher position of the pump housing. The pressing member is arranged within the handle so that the operating end of the clean water to sewage conversion mechanism is away from the dirty bottom of the pump housing.

[0009] Alternatively, the clean water / sewage conversion mechanism includes a conversion knob and a dial block. The conversion knob is rotatably connected to the pump housing and fixed to the dial block. A limit ring is axially positioned on the pump housing. The limit ring is provided with a disconnection portion. The two ends of the limit ring are butted at the disconnection portion. The dial block is located between the two ends. The limit ring is controlled by the dial block to switch between a contracted state and an expanded state. A limit block is provided on the inner circumference of the limit ring. When the base is in the clean water drainage position and the sewage drainage position, the limit ring is in a contracted state. When the clean water / sewage conversion is started, the limit ring is in an expanded state, and the base and the limit block are unlocked. This technical solution can provide another control method for the clean water / sewage conversion mechanism. By simply rotating the conversion knob, the distance between the two ends can be widened by the dial block, thereby also achieving the expansion of the limit ring.

[0010] The clean water inlet of this clean / sewage conversion pump is preferably located in the center hole of the base. This structure minimizes residual water levels. During drainage, the base touches the bottom of the water, and water flows directly into the pump casing through the center hole. The gap between the base and the bottom prevents large particles and debris from entering. The center hole is only suitable as the water inlet when the pump is designed to drain water while also filtering large particles or debris.

[0011] Preferably, a mesh rib is provided in the central hole, which can further reduce the passing area of ​​the central hole and better prevent large particles or debris from entering.

[0012] Alternatively, the clean water inlet of the clean and sewage conversion pump is the gap between the bottom of the pump casing and the base. If this structure is adopted, the water inlet is the same regardless of the clean water drainage or sewage drainage mode, and only the size of the gap between the bottom of the pump casing and the base is different.

[0013] The beneficial effects of the present invention are:

[0014] The invention is easy to operate and reduces the chance of contact with dirt. The switching between the clean water drainage and sewage drainage working modes of the water pump can be easily achieved without contacting the dirtiest bottom of the water pump, and the operation is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention in the clean water drainage mode;

[0017] Figure 3 This is a schematic diagram of the structure of the present invention after removing the pump casing;

[0018] Figure 4 Schematic diagram of the cooperation between the limit ring and the moving block in the present invention;

[0019] Figure 5 Schematic diagram of the structure of the limiting ring in the present invention;

[0020] Figure 6 This is a schematic diagram of the structure after the moving block is separated from the limiting ring in the present invention;

[0021] Figure 7 This is a schematic diagram of the structure of the present invention after the base is removed;

[0022] Figure 8 Another structural diagram of the present invention;

[0023] Figure 9 This is a schematic diagram of the cooperation between the limiting ring, the shifting block, and the tightening arm in the present invention;

[0024] Figure 10 This is a schematic diagram of the structure after the shifting block and the tightening arm are separated from the limiting ring in the present invention;

[0025] Figure 11 Schematic diagram of another structure of the pressing member in the present invention.

[0026] In the figure, 1- pump housing, 2- base, 3- pressing part, 4- moving block, 5- limiting ring, 6- base spring, 7- limiting block, 8- pressure slope, 9- end, 10- seat plate, 11- guide column, 12- locking rod, 13- limiting bayonet, 14- transmission rod, 15- handle, 16- return spring, 17- conversion knob, 18- dial block, 19- center hole, 20- wedge groove, 21- motor, 22- connecting guide column, 23- connecting sleeve, 24- water outlet, 25- reinforcing rib, 26- tightening arm. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to specific embodiments of the drawings.

[0028] Example 1:

[0029] like Figures 1 to 7As shown, a clean-sewage conversion water pump includes a pump casing 1, a base 2 and a motor 21. The motor 21 is fixed in the pump casing 1. The pump casing 1 includes an upper section, a middle section and a bottom section. The motor 21 is fixed to the upper section by long bolts. The top of the middle section has an inner flange. The bottom section is fixed to the motor 21 by bolts. The bottom section has a closed partition. A compression chamber is integrally provided on the closed partition. An impeller is provided in the compression chamber. The impeller and the output end of the motor 21 are provided. A pumping hole is provided in the center of the closed partition, and a water outlet hole 24 is provided on the circumference of the bottom section. The base 2 is slidably connected to the bottom end of the pump casing 1. The base 2 has two working positions: a clean water drainage position and a sewage drainage position. A clean water and sewage conversion mechanism is provided in the cavity enclosed by the pump casing 1 and the base 2. The base 2 is connected to the clean water and sewage conversion mechanism and switches between the clean water drainage position and the sewage drainage position under the control of the clean water and sewage conversion mechanism. The operating end of the clean water and sewage conversion mechanism is located at the upper part of the pump casing 1. The clean water and sewage conversion mechanism includes a pressing member 3, a moving block 4, a limiting ring 5, and a base spring 6. The pressing member 3 is connected to the pump housing 1 and is in transmission connection with the moving block 4. Four connecting guide pillars 22 are integrally provided at the bottom of the closed partition of the bottom section. The bottom ends of the connecting guide pillars 22 are provided with axial cracks, which allow the bottom ends of the connecting guide pillars 22 to contract radially. The bottom ends of the connecting guide pillars 22 are also provided with an outer flange, and the base spring 6 is sleeved on the connecting guide pillars 22. The bottom of the limiting ring 5 is supported by the closed partition on the bottom section of the pump housing 1, and the top of the limiting ring 5 abuts against the inner flange at the top of the middle section of the pump housing 1, thereby axially positioning the limiting ring 5 on the pump housing 1. The limiting ring 5 is formed by bending an elastic band. A reinforcing rib 25 is integrally provided on the outer circumference of the limiting ring 5 to enhance the strength and resilience of the limiting ring 5. A disconnection portion is provided on the limiting ring 5. The two ends 9 of the limiting ring 5 are butted at the disconnection portion. The moving block 4 is inserted between the two ends 9 of the limiting ring 5. The limiting ring 5 has a contracted state and an expanded state. The limiting ring 5 is controlled by the moving block 4 to switch between the contracted state and the expanded state. A limiting block 7 is provided on the inner circumference of the limiting ring 5. When the base 2 is in the clean water drainage position and the sewage drainage position, the limiting ring 5 is in the contracted state, and the base 2 is locked with the limiting block 7. Only in the clean water conversion start-up state, that is, when the base is in the start-up state of the conversion between the clean water drainage position and the sewage drainage position, the limiting ring 5 is in the expanded state, and the base 2 is unlocked with the limiting block 7. The middle portion of the movable block 4 is in an inverted triangle shape, with symmetrical pressure ramps 8. The bottom of the movable block 4 is provided with symmetrical wedge-shaped grooves 20, and the end 9 is provided with an inclined surface that fits snugly with the pressure ramps 8 and the walls of the wedge-shaped grooves 20. The base 2 includes a base plate 10, four guide posts 11, two locking rods 12, and four connecting sleeves 23. The guide posts 11, locking rods 12, and connecting sleeves 23 are all integrally formed with the base plate 10. The guide posts 11 fit snugly with the inner circumference of the pump housing 1, and the locking rods 12 are provided with a limit stop 13 that allows the limit block 7 to be inserted.The connecting sleeve 23 is sleeved onto the connecting guide post 22. The bottom end of the base spring 6 abuts against the top end of the connecting sleeve 23. The top end of the connecting sleeve 23 is provided with an inner buckle. When the base 2 and the pump housing 1 are separated and the connecting sleeve 23 and the connecting guide post 22 slide relative to each other to the limit, the bottom end of the connecting guide post 22 loses the radial constraint of the connecting sleeve 23. The bottom end of the connecting guide post 22, which had originally contracted radially into the gap, rebounds. The inner buckle and the outer flange of the connecting guide post 22 form a locking lock, thus preventing the base 2 from falling off the pump housing 1. A U-shaped handle 15 is provided at the top of the pump housing 1. The pressing member 3 is slidably embedded in one end of the handle 15. A transmission rod 14 is provided between the pressing member 3 and the movable block 4. The transmission rod 14 is slidably connected to the handle 15. A return spring 16 is provided between the pressing member 3 and the inner flange. The return spring 16 is sleeved onto the movable block 4. The clean water inlet end of the clean-sewage conversion water pump is located in the center hole 19 of the base 2, and a mesh rib is provided in the center hole 19.

[0030] The method of using this sewage conversion pump is as follows:

[0031] When switching from the clean water drainage mode to the sewage drainage mode, lightly press the pressing piece 3 to drive the transmission rod 14 downward, thereby driving the moving block 4 to move downward. After the moving block 4 moves downward, the end head 9 cooperates with the pressure slope 8 and the wedge-shaped groove 21 wall through the slope to convert the axial thrust of the moving block 4 into a lateral thrust, driving the distance between the two end heads 9 of the limit ring 5 to expand, thereby realizing the expansion of the limit ring 5, and the limit block 7 moves out of the limit bayonet 13, and the base 2 and the limit ring 5 are unlocked. Then the base spring 6 that has been compressed and accumulated force pushes the base 2 to move downward, and the gap between the base 2 and the bottom end of the pump casing 1 is widened to the maximum. At this time, the pressure on the pressing piece 3 is removed, and the limit ring 5 returns to the contracted state. The limit block 7 is stuck at the top of the locking rod 12, preventing the base 2 from retreating and maintaining the gap between the base 2 and the bottom end of the pump casing 1.

[0032] To switch from sewage drainage mode to clean water drainage mode, place the pump on the ground or other supporting surface and gently press the pressing member 3 to drive the transmission rod 14 downward, causing the movable block 4 to move downward. After the movable block moves downward, it expands the limit ring 5, causing the limit block 7 on the limit ring 5 to move outward. Press the pressing member 3 to ensure that the limit ring 5 remains expanded to prevent the limit block 7 from retracting and forming an obstruction. Then, press the handle 15 or the pump housing 1 firmly downward to move the pump housing 1 and motor 21 downward as a whole, gradually approaching the base 2 until the base 2 and the pump housing 1 abut. At this point, the relative position of the water pump changes from sewage mode to clean water mode. Release the pressing member 3, and the movable block 4 returns to its original position under the action of the return spring 16, driving the limit ring 5 to return to its original position. The limit block 7 re-engages the limit block 13 and locks the base 2. After the limit ring 5 is reset, it prevents the water pump from moving downward to clean water drainage mode due to its own weight or unexpected force.

[0033] Example 2:

[0034] like Figures 8 to 10 As shown, the clean water / sewage conversion mechanism includes a conversion knob 17, an elliptical shift block 18, and a tightening arm 26. The conversion knob 17 is rotatably connected to the middle section of the pump housing 1 and fixed to the shift block 18 via a shaft. The tightening arm 26 is integrally formed with the shift block 18, with the shift block 18 located in the center of the tightening arm 26 and stops integrated into each end of the tightening arm 26. An end plate is integrally mounted on the end head 9, with the shift block 18 located between the two end heads 9 and the stops engaging the outer surfaces of the end plate. The limit ring 5 is controlled by the shift block 18 to switch between a retracted and an expanded state. A stop block 7 is provided on the inner circumference of the limit ring 5. When the base 2 is in the clean water and sewage drainage positions, the limit ring 5 is in a retracted state. When the clean water / sewage conversion is activated, the limit ring 5 is in an expanded state, and the base 2 is unlocked from the stop block 7. Under normal conditions, the long axis of the shift block 18 is parallel to the central axis of the limit ring 5. The remaining configuration is the same as in Example 1.

[0035] When switching from the clean water drainage mode to the sewage drainage mode, the conversion knob 17 is rotated to rotate the shift block 18, and the long axis of the shift block 18 gradually changes from a direction parallel to the central axis of the limit ring 5 to a direction perpendicular to the central axis of the limit ring 5. The long axis end of the shift block 18 squeezes the inner side of the end plate, driving the two end heads 9 of the limit ring 5 to expand the distance, thereby realizing the expansion of the limit ring 5, and the limit block 7 moves out of the limit bayonet 13, and the base 2 and the limit ring 5 are unlocked. Then the base spring 6 that has been compressed and accumulated force pushes the base 2 to move downward, and the gap between the base 2 and the bottom end of the pump casing 1 is widened to the maximum. At this time, the conversion knob 17 is rotated in the opposite direction, and the blocks at both ends of the tightening arm 26 push the two end heads 9 together, so that the limit ring 5 returns to the contracted state, and the limit block 7 is stuck at the top of the locking rod 12, preventing the base 2 from retreating, and maintaining the gap between the base 2 and the bottom end of the pump casing 1.

[0036] To switch from sewage drainage mode to clean water drainage mode, place the pump on the ground or other supporting surface, rotate the conversion knob 17, rotate the shift block 18, and then expand the limit ring 5, causing the limit block 7 on the limit ring 5 to move outward. Hold the conversion knob 173 to ensure that the limit ring 5 remains expanded to prevent the limit block 7 from retracting and forming an obstruction. Press down on the pump housing 1, causing the pump housing 1 and motor 21 to move downward as a whole, gradually approaching the base 2, until the base 2 and the pump housing 1 abut. At this time, the relative position of the water pump changes from sewage state to clean water state. Rotate the conversion knob 17 in the opposite direction, and the limit ring 5 will retract and reset, and the limit block 7 will re-engage the limit block 13, locking the base 2. After the limit ring 5 is reset, it can prevent the water pump from moving downward to clean water drainage mode due to its own weight or unexpected force.

[0037] Example 3:

[0038] The clean water inlet of the clean and dirty water conversion pump is the gap between the bottom of the pump housing 1 and the base 2. Figure 11As shown, the top of the handle 15 is hollowed out to form an embedding groove. The pressing member 3 is also U-shaped and is inserted into the embedding groove at the top of the handle 15 with a ring. One end of the pressing member 3 is connected to the transmission rod 14, and the return spring 16 is connected between the other end of the pressing member 3 and the motor 21. The rest of the process is the same as in Example 1.

Claims

1. A sewage conversion water pump, comprising a pump housing, a base and a motor, wherein the motor is fixed in the pump housing, and is characterized in that The base is slidably connected to the bottom end of the pump casing. The base has a clean water drainage level and a sewage drainage level. A clean water and sewage conversion mechanism is provided in the cavity enclosed by the pump casing and the base. The base is connected to the clean water and sewage conversion mechanism and switches between the clean water drainage level and the sewage drainage level under the control of the clean water and sewage conversion mechanism. The operating end of the clean water and sewage conversion mechanism is located in the upper middle part of the pump casing. The clean water and sewage conversion mechanism includes a pressing piece, a moving block, a limiting ring and a base spring. The pressing piece is connected to the pump casing and is transmission-connected to the moving block. The limiting ring is axially positioned on the pump casing. A disconnecting part is provided on the limiting ring. The two end heads of the limiting ring are docked at the disconnecting part. The moving block is inserted between the two end heads of the limiting ring. The limiting ring is controlled by the moving block to switch between a contracted state and an expanded state. A limiting block is provided on the inner circumference of the limiting ring.

2. The clean-sewage conversion water pump according to claim 1 is characterized in that When the base is at the clean water drainage position and the sewage drainage position, the limit ring is in a contracted state. In the clean water and sewage conversion start-up state, the limit ring is in an expanded state, and the base and the limit block are unlocked.

3. The clean-sewage conversion water pump according to claim 1 is characterized in that A symmetrical pressure inclined surface is provided in the middle of the moving block, a symmetrical wedge-shaped groove is provided at the bottom of the moving block, and an inclined surface which is adapted to fit the pressure inclined surface and the wall of the wedge-shaped groove is provided at the end.

4. The clean-sewage conversion water pump according to claim 1 is characterized in that The base includes a base plate, a guide column and a locking rod. The guide column and the locking rod are fixed on the base plate. The guide column fits well with the inner circumference of the pump casing. The locking rod is provided with a limit slot for accommodating a limit block to be embedded.

5. The clean-sewage conversion water pump according to claim 1 is characterized in that A handle is provided on the pump housing, a pressing piece is slidably embedded in the handle, a transmission rod is provided between the pressing piece and the moving block, the transmission rod is slidably connected in the handle, a return spring is provided between the pressing piece and the limiting ring, and the return spring is sleeved on the moving block.

6. A sewage conversion water pump, comprising a pump housing, a base and a motor, wherein the motor is fixed in the pump housing, and is characterized in that The base is slidably connected to the bottom end of the pump casing, and the base has a clean water drainage position and a sewage drainage position. A clean water and sewage conversion mechanism is provided in the cavity enclosed by the pump casing and the base, and the base is connected to the clean water and sewage conversion mechanism and switches between the clean water drainage position and the sewage drainage position under the control of the clean water and sewage conversion mechanism. The operating end of the clean water and sewage conversion mechanism is located at the middle and upper part of the pump casing, and the clean water and sewage conversion mechanism includes a conversion knob and a dial block, the conversion knob is rotatably connected to the pump casing and fixed to the dial block, the limit ring is axially positioned on the pump casing, the limit ring is provided with a disconnection part, the two ends of the limit ring are docked at the disconnection part, the dial block is located between the two ends, the limit ring is controlled by the dial block to switch between a contraction state and an expansion state, and a limit block is provided on the inner circumference of the limit ring. When the base is in the clean water drainage position and the sewage drainage position, the limit ring is in a contraction state. When the clean and sewage conversion is started, the limit ring is in an expansion state, and the base and the limit block are unlocked.

7. The clean-sewage conversion water pump according to claim 6 is characterized in that The clean water inlet end of the clean and dirty water conversion pump is located at the center hole of the base.

8. The clean-sewage conversion water pump according to claim 7 is characterized in that A mesh rib is provided in the center hole.

9. The clean-sewage conversion water pump according to claim 6, characterized in that The clean water inlet end of the clean-sewage conversion water pump is the gap between the bottom end of the pump casing and the base.

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