Backwash switching mechanism and prefilter thereof
The mechanical backwashing switching mechanism solves the problems of insufficient water pressure and impurity blockage in existing disc pre-filters, and achieves stable switching between filtration and backwashing states, thereby improving filtration efficiency and water flow.
Patent Information
- Application Number
- CN202520392438.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-06
AI Technical Summary
Existing upright and inverted disc pre-filters suffer from problems such as insufficient water pressure, production and assembly errors, and impurity blockage when switching between filtration and backwashing states, resulting in poor switching or filtration effect.
The backwash switching mechanism, which adopts a mechanical structure, achieves the switching between filtration and backwashing states by rotating a 180° lifting track and rotating the flow channel holes. Combined with the flow channel switching component and sealing component, it ensures effective switching of the water flow channel and filtration of impurities.
It achieves stable switching between filtration and backwashing states under different water pressure conditions, avoiding impurity blockage and improving filtration efficiency and water flow.
Smart Images
Figure CN223914840U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water purification equipment technology, and in particular to a backwashing switching mechanism and its pre-filter. Background Technology
[0002] Existing disc pre-filters come in two structures: upright and inverted. However, the existing upright disc pre-filters have the following drawbacks: First, during the filtration process, due to the large mass of impurities, they will settle. Impurities that detach from the discs will continue to coat the lower discs, resulting in a reduction in the flow area and flow rate. Second, the switching between filtration and backwashing states in upright disc pre-filters relies on pressure difference. When the water pressure is low, it is impossible to switch from filtration to backwashing.
[0003] The inverted disc pre-filter has the following drawbacks: First, during filtration, the large-pore backwash and high-pressure backwash during sewage discharge rely on the rotation and misalignment of the disc skeleton and inner skeleton to switch between large and small pores. When the gap between the disc skeleton and inner skeleton is large, the flow channel increases, resulting in a decrease in the spray pressure of the backwash nozzles and a weaker rinsing effect. When the gap between the disc skeleton and inner skeleton is small, a large force is required during the rotation and switching process. Second, when small impurities enter the gap between the disc skeleton and inner skeleton, the inner skeleton cannot rotate, preventing the large flow channel during filtration and the high-pressure spray nozzles during backwash from switching, thus hindering high-pressure backwashing. Utility Model Content
[0004] The purpose of this utility model is to solve the above-mentioned technical problems by providing a backwashing switching mechanism and its pre-filter. This utility model adopts a mechanical structure for switching, which will not fail to switch between the two states of backwashing and filtration due to insufficient water pressure, nor will it fail to switch between the two states due to production or assembly errors or impurities stuck in the gaps.
[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a backwashing switching mechanism, including a drain knob, a drain mechanism connected to the drain knob, and a valve core for switching the inlet and outlet water channels. The valve core is connected to the drain mechanism and has a flow channel hole. The drain knob can rotate through the drain mechanism to drive the valve core to rotate the flow channel hole to the filtration position or the backwashing position. When the flow channel hole is rotated to the filtration position, it is connected to the outlet pipe; when it is rotated to the backwashing position, it is connected to the inlet pipe.
[0006] Preferably, a semi-circular lifting element is provided above the valve core, with a lifting track on the lifting element. The valve core has a lug located within the lifting track, which can be raised or lowered as the valve core rotates. With the semi-circular lifting track, the user can rotate the valve core 180° to move it from one end to the other, simultaneously rotating the flow channel hole 180° to align it with the inlet or outlet pipe.
[0007] Preferably, the valve core has a boss, and a flow channel switching component is provided on the boss. The flow channel switching component can rise or fall with the boss. By setting the flow channel switching component, when the flow channel switching component is lowered, it is in the filtration state, and the flow channel switching component opens the central flow channel of the disc frame, increasing the flow rate of filtered water; when the flow channel switching component is raised, it is in the backwashing state, and the flow channel switching component closes the central flow channel of the disc frame, and the water flows through the backwashing flow channel on the disc frame to the outside of the discs, cleaning the discs.
[0008] Preferably, the flow channel switching component includes a switching component frame mounted on the boss, a filter screen mounted on the outside of the switching component frame, and a sealing component mounted on top of the switching component frame. The sealing component allows the central flow channel of the laminated frame to be closed when the switching component frame rises. The filter screen ensures that when the central flow channel of the laminated frame is closed, the water flow must pass through the filter screen and then flow upwards to the backwash channel on the laminated frame, thus reducing impurities through preliminary filtration.
[0009] Preferably, the sewage discharge mechanism includes a valve core switching component and a sewage discharge shaft. The lower end of the valve core switching component is connected to the sewage discharge knob, the upper end of the valve core switching component is connected to the valve core, and the sewage discharge shaft is locked inside the valve core switching component.
[0010] Preferably, the valve core has a connection hole at the bottom and a connection shaft at the top of the valve core switching component. The connection shaft is inserted into the connection hole to connect the valve core switching component to the valve core.
[0011] Preferably, the valve core switching component is provided with a drain hole and a rod groove, and the drain shaft is provided with a shaft portion and side rods protruding to both sides. The shaft portion is inserted into the drain hole, and the side rods are inserted into the rod grooves. Rotating the drain knob drives the valve core switching component to rotate. When the valve core switching component is at the rising point on the lifting track, it drives the drain shaft to rise, opening the drain hole. When the valve core switching component is at the falling point on the lifting track, it drives the drain shaft to fall, closing the drain hole.
[0012] The pre-filter includes a head with an inlet pipe and an outlet pipe, a filter bottle on the head, a backwashing switching mechanism inside the head, and a disc frame and discs inside the filter bottle, with the disc frame positioned above the backwashing mechanism.
[0013] Preferably, the laminated frame is provided with a central flow channel and a backwash flow channel, and the side of the laminated frame is provided with a filter water passage and a backwash water spray hole. The filter water passage is connected to the central flow channel, and the backwash water spray hole is connected to the backwash flow channel. The flow channel switching component can be raised and lowered to open or close the central flow channel.
[0014] Preferably, the lamination frame has a groove, and the lifting component has a protrusion. The protrusion is located in the groove to engage the lifting component and the lamination frame. A fixing block is located on the machine head, and the lifting component has a limiting part. The fixing block engages with the limiting part. By engaging the lamination frame and the lifting component, and by engaging the machine head and the lifting component, the lamination frame and the lifting component are prevented from rotating with the valve core.
[0015] The beneficial effects of this utility model are: the mechanical structure of this utility model will not prevent the switching between backwashing and filtration states due to insufficient water pressure, nor will it prevent the switching between backwashing and filtration states from being impossible due to production or assembly errors or impurities stuck in the gaps. At the same time, impurities will not be covered on the stacked plates. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the pre-filter's filtration state.
[0017] Figure 2 yes Figure 1 A cross-sectional view along the AA direction.
[0018] Figure 3 This is a schematic diagram of the pre-filter in the backwashing state.
[0019] Figure 4 yes Figure 3 A cross-sectional view along the BB direction.
[0020] Figure 5 This is a schematic diagram of the valve core.
[0021] Figure 6 This is a structural schematic diagram of the valve core from another perspective.
[0022] Figure 7 This is a schematic diagram of the sewage discharge mechanism.
[0023] Figure 8 This is a structural schematic diagram of the valve core switching component.
[0024] Figure 9 This is a schematic diagram of the sewage discharge shaft.
[0025] Figure 10 This is a structural schematic diagram of the lifting component.
[0026] Figure 11 This is a schematic diagram of the flow channel switching component.
[0027] Figure 12 This is a schematic diagram of the stacked skeleton structure.
[0028] Figure 13 This is a schematic diagram of the machine head structure.
[0029] In the diagram: 1. Drain knob, 2. Valve core, 21. Flow channel hole, 22. Lug, 23. Boss, 24. Connecting hole, 3. Lifting component, 31. Lifting rail, 32. Protrusion, 33. Limiting part, 4. Flow channel switching component, 41. Switching component skeleton, 42. Filter screen, 43. Sealing component, 5. Valve core switching component, 51. Connecting shaft, 52. Drain hole, 53. Rod groove, 6. Drain shaft, 61. Shaft part, 62. Side rod, 7. Machine head, 71. Inlet pipe, 72. Outlet pipe, 73. Fixing block, 8. Filter bottle, 9. Disc skeleton, 91. Central flow channel, 92. Backwash flow channel, 93. Filter water passage, 94. Backwash spray hole, 95. Groove, 10. Disc. Detailed Implementation
[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0031] like Figure 1-13 As shown, the present invention provides a backwashing switching mechanism, including a drain knob 1, a draining mechanism connected to the drain knob 1, and a valve core 2 for switching the inlet and outlet water channels. The valve core 2 is connected to the draining mechanism and has a flow channel hole 21. The drain knob 1 can rotate through the draining mechanism to drive the valve core 2 to rotate the flow channel hole 21 to the filtration position or the backwashing position.
[0032] A semi-circular lifting component 3 is provided above the valve core 2. The lifting component 3 is provided with a lifting track 31. The valve core 2 is provided with a lug 22. The lug 22 is located in the lifting track 31 and can be raised or lowered as the valve core 2 rotates.
[0033] The valve core 2 has a boss 23 inside, and a flow channel switching component 4 is provided on the boss 23. The flow channel switching component 4 can rise or fall with the boss 23.
[0034] The flow channel switching component 4 includes a switching component skeleton 41 disposed on the boss 23, a filter screen 42 disposed outside the switching component skeleton 41, and a sealing component 43 disposed above the switching component skeleton 41.
[0035] The sewage discharge mechanism includes a valve core switching component 5 and a sewage discharge shaft 6. The lower end of the valve core switching component 5 is connected to the sewage discharge knob 1, and the upper end of the valve core switching component 5 is connected to the valve core 2. The sewage discharge shaft 6 is locked inside the valve core switching component 5.
[0036] The valve core 2 has a connection hole 24 at the bottom and the valve core switching component 5 has a connection shaft 51 at the top. The connection shaft 51 is inserted into the connection hole 24 to connect the valve core switching component 5 and the valve core 2.
[0037] The valve core switching component 5 is provided with a drain hole 52 and a rod groove 53. The drain shaft 6 is provided with a shaft part 61 and a side rod 62 protruding to both sides. The shaft part 61 is inserted into the drain hole 52 and the side rod 62 is inserted into the rod groove 53.
[0038] The pre-filter includes a head 7 with an inlet pipe 71 and an outlet pipe 72, a filter bottle 8 on the head 7, a backwashing switching mechanism inside the head 7, a disc frame 9 inside the filter bottle 8 and discs 10 outside the disc frame 9, and the disc frame 9 is located above the backwashing mechanism.
[0039] The laminated frame 9 has a central flow channel 91 and a backwash flow channel 92 inside. The side of the laminated frame 9 has a filter water passage 93 and a backwash water spray hole 94. The filter water passage 93 is connected to the central flow channel 91, and the backwash water spray hole 94 is connected to the backwash flow channel 92. The flow channel switching component 4 can lift and open or close the central flow channel 91.
[0040] The stacked frame 9 is provided with a groove 95, and the lifting component 3 is provided with a protrusion 32. The protrusion 32 is located in the groove 95 to lock the lifting component 3 and the stacked frame 9; the machine head 7 is provided with a fixing block 73, and the lifting component 3 is provided with a limiting part 33. The fixing block 73 is locked with the limiting part 33.
[0041] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0042] It should be noted that when a component is referred to as "fixed on" or "set on" another component, it can be located directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to the other component.
[0043] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or the number of technical features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
Claims
1. A backflushing switching mechanism, characterized by: The utility model provides a filter with backwashing and switching mechanism, which comprises a blowdown knob (1), a blowdown mechanism connected with the blowdown knob (1), a valve core (2) for switching water inlet and outlet flow channels, the valve core (2) being connected with the blowdown mechanism, the valve core (2) being provided with a flow channel hole (21), the blowdown knob (1) being rotatable to drive the valve core (2) to rotate the flow channel hole (21) to a filtering position or a backwashing position through the blowdown mechanism.
2. The backflushing switching mechanism according to claim 1, characterized in that: The valve core (2) is provided with a semicircular lifting piece (3) above, the lifting piece (3) is provided with a lifting track (31), the valve core (2) is provided with a lug (22), the lug (22) is arranged in the lifting track (31) and can be lifted or lowered with the rotation of the valve core (2).
3. The backflushing switching mechanism according to claim 2, characterized in that: The valve core (2) is provided with a boss (23) inside, the boss (23) is provided with a flow channel switching piece (4), the flow channel switching piece (4) can be lifted or lowered with the boss (23).
4. The backflushing switching mechanism according to claim 3, characterized in that: The flow channel switching piece (4) comprises a switching piece framework (41) arranged on the boss (23), a filter screen (42) arranged on the outer side of the switching piece framework (41) and a sealing piece (43) arranged above the switching piece framework (41).
5. The backflushing switching mechanism of claim 1, wherein: The blowdown mechanism comprises a valve core switching piece (5) and a blowdown shaft (6), the lower end of the valve core switching piece (5) is connected with the blowdown knob (1), the upper end of the valve core switching piece (5) is connected with the valve core (2), and the blowdown shaft (6) is clamped in the valve core switching piece (5).
6. The backflushing switching mechanism of claim 5, wherein: The valve core (2) is provided with a connecting hole (24) at the bottom, the valve core switching piece (5) is provided with a connecting shaft (51) at the top, the connecting shaft (51) is inserted into the connecting hole (24) to connect the valve core switching piece (5) with the valve core (2).
7. The backflushing switching mechanism according to claim 6, characterized in that: The valve core switching piece (5) is provided with a blowdown hole (52) and a rod groove (53), the blowdown shaft (6) is provided with a shaft portion (61) and a side rod (62) protruding to both sides, the shaft portion (61) is inserted into the blowdown hole (52), and the side rod (62) is inserted into the rod groove (53).
8. A prefilter characterized by: The utility model provides a filter with backwashing and switching mechanism, which comprises a blowdown knob (1), a blowdown mechanism connected with the blowdown knob (1), a valve core (2) for switching water inlet and outlet flow channels, the valve core (2) being connected with the blowdown mechanism, the valve core (2) being provided with a flow channel hole (21), the blowdown knob (1) being rotatable to drive the valve core (2) to rotate the flow channel hole (21) to a filtering position or a backwashing position through the blowdown mechanism.
9. The prefilter of claim 8, wherein: The valve core (2) is provided with a semicircular lifting piece (3) above, the lifting piece (3) is provided with a lifting track (31), the valve core (2) is provided with a lug (22), the lug (22) is arranged in the lifting track (31) and can be lifted or lowered with the rotation of the valve core (2).
10. The prefilter of claim 8, wherein: The valve core (2) is provided with a boss (23) inside, the boss (23) is provided with a flow channel switching piece (4), the flow channel switching piece (4) can be lifted or lowered with the boss (23). The flow channel switching piece (4) comprises a switching piece framework (41) arranged on the boss (23), a filter screen (42) arranged on the outer side of the switching piece framework (41) and a sealing piece (43) arranged above the switching piece framework (41). The blowdown mechanism comprises a valve core switching piece (5) and a blowdown shaft (6), the lower end of the valve core switching piece (5) is connected with the blowdown knob (1), the upper end of the valve core switching piece (5) is connected with the valve core (2), and the blowdown shaft (6) is clamped in the valve core switching piece (5). The valve core (2) is provided with a connecting hole (24) at the bottom, the valve core switching piece (5) is provided with a connecting shaft (51) at the top, the connecting shaft (51) is inserted into the connecting hole (24) to connect the valve core switching piece (5) with the valve core (2). The valve core switching piece (5) is provided with a blowdown hole (52) and a rod groove (53), the blowdown shaft (6) is provided with a shaft portion (61) and a side rod (62) protruding to both sides, the shaft portion (61) is inserted into the blowdown hole (52), and the side rod (62) is inserted into the rod groove (53). The utility model provides a filter with backwashing and switching mechanism, which comprises a blowdown knob (1), a blowdown mechanism connected with the blowdown knob (1), a valve core (2) for switching water inlet and outlet flow channels, the valve core (2) being connected with the blowdown mechanism, the valve core (2) being provided with a flow channel hole (21), the blowdown knob (1) being rotatable to drive the valve core (2) to rotate the flow channel hole (21) to a filtering position or a backwashing position through the blowdown mechanism. The valve core (2) is provided with a semicircular lifting piece (3) above, the lifting piece (3) is provided with a lifting track (31), the valve core (2) is provided with a lug (22), the lug (22) is arranged in the lifting track (31) and can be lifted or lowered with the rotation of the valve core (2). The valve core (2) is provided with a boss (23) inside, the boss (23) is provided with a flow channel switching piece (4), the flow channel switching piece (4) can be lifted or lowered with the boss (23). The flow channel switching piece (4) comprises a switching piece framework (41) arranged on the boss (23), a filter screen (42) arranged on the outer side of the switching piece framework (41) and a sealing piece (43) arranged above the switching piece framework (41). The blowdown mechanism comprises a valve core switching piece (5) and a blowdown shaft (6), the lower end of the valve core switching piece (5) is connected with the blowdown knob (1), the upper end of the valve core switching piece (5) is connected with the valve core (2), and the blowdown shaft (6) is clamped in the valve core switching piece (5). The valve core (2) is provided with a connecting hole (24) at the bottom, the valve core switching piece (5) is provided with a connecting shaft (51) at the top, the connecting shaft (51) is inserted into the connecting hole (24) to connect the valve core switching piece (5) with the valve core (2). The valve core switching piece (5) is provided with a blowdown hole (52) and a rod groove (53), the blowdown shaft (6) is provided with a shaft portion (61) and a side rod (62) protruding to both sides, the shaft portion (61) is inserted into the blowdown hole (52), and the side rod (62) is inserted into the rod groove (53).