Pre-filter

Abstract

The utility model provides a pre-filter. The pre-filter comprises a filter shell, wherein a multi-way valve operation knob is arranged at the top of the filter shell; a filter flange is arranged below the multi-way valve operation knob; the filter flange is internally provided with a valve position control shaft, a waterway control disc and a valve seat which are sequentially arranged from top to bottom, a threaded hole is formed in the center of the top of the valve position control shaft, and the multi-way valve operation knob is connected with the valve position control shaft through the threaded hole; a shaft hole and a valve position limiting groove are formed in the top of the filter flange, and the valve position control shaft penetrates through the shaft hole to be connected with the multi-way valve operation knob; and a plurality of waterway channels are arranged in the valve seat. According to the utility model, the multi-way valve device is arranged, so that the pre-filter can be cleaned or maintained by randomly switching waterways without closing a main valve, normal water use of a family is not influenced in the whole process, and the pre-filter can also be used as a water valve to close a water source.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters and relates to a pre-filter. Background Art

[0002] The function of the pre-filter is relatively intuitive. Various impurities intercepted in the water can be clearly seen visually. After the pre-filter is used for a certain number of years or due to a high content of raw water impurities, fine particles in the filter screen cannot be cleaned after flushing. Users need to flush and disassemble and wash regularly. However, during the disassembly and washing process, the main valve often needs to be closed in order to smoothly carry out the cleaning operation of the pre-filter. During the process of cleaning the pre-filter, the domestic water supply will be cut off throughout, bringing great inconvenience to the family.

[0003] In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide a pre-filter. By setting a multi-way valve device, the pre-filter can be switched to different water paths at will for cleaning or repairing the pre-filter without closing the main valve, and the normal domestic water use is not affected throughout the process.

[0005] In order to achieve the above object of the present utility model, the following technical solutions are specifically adopted:

[0006] A pre-filter includes a filter housing; wherein, a multi-way valve operation knob is arranged at the top of the filter housing; a filter flange is arranged below the multi-way valve operation knob; inside the filter flange, a valve position control shaft, a water path control disc and a valve seat are sequentially arranged from top to bottom. A threaded hole is arranged at the center of the top of the valve position control shaft, and the multi-way valve operation knob is connected to the valve position control shaft through the threaded hole; a shaft hole and a valve position limiting groove are arranged at the top of the filter flange, and the valve position control shaft passes through the shaft hole and is connected to the multi-way valve operation knob; a plurality of water path channels are arranged in the valve seat.

[0007] Preferably, as a further implementable solution, an inlet and an outlet are respectively arranged on both sides of the filter flange; a connection port is arranged at the bottom of the filter flange, and multiple layers of internal threads are arranged in the connection port for screwing the filter bottle assembly to the filter flange through the multiple layers of internal threads.

[0008] Preferably, as a further implementable solution, the valve position control shaft and the bottom flange are integrated. A protrusion is arranged at the center of the bottom of the valve position control shaft, and the top end of the protrusion is hexagonal. The hexagonal shape at the top end of the protrusion of the valve position control shaft meshes with the multi-way valve operation knob.

[0009] Preferably, as a further feasible solution, a plurality of radial sealing grooves are provided on the middle section axis of the protrusion for placing a plurality of valve position control shaft sealing rings; a groove is provided at the root of the protrusion for placing a valve position control shaft movement pad.

[0010] Preferably, as a further feasible solution, positioning beads are provided at the bottom of the multi-way valve operation knob, the positioning beads correspond to the valve position limiting groove, and a positioning pit is provided at the bottom of the valve position limiting groove.

[0011] Preferably, as a further feasible solution, a groove is provided at the bottom of the water path control disk, and a water path control disk sealing gasket and a water path control disk movement ceramic sheet are placed in the groove for realizing dynamic sealing with the valve seat.

[0012] Preferably, as a further feasible solution, a groove is provided at the upper end of the water path control disk, and a valve position control shaft sealing gasket is provided in the groove for realizing seamless connection between the water path control disk and the valve position control shaft.

[0013] Preferably, as a further feasible solution, water inlets and water outlets are provided on both sides of the valve seat, the water inlets and water outlets are respectively connected to a water inlet connector and a water outlet connector, and a plurality of sealing rings are provided on the water inlet connector and the water outlet connector. The sealing rings are used for seamlessly connecting between the water inlets and water outlets of the valve seat and the filter flange, so that the water inlet connector and the water outlet connector can allow water source to enter the valve seat and output the water source from the valve seat; a groove is provided at the upper end of the valve seat, a valve seat sealing gasket is provided at the bottom of the groove, and a valve seat movement ceramic sheet is provided on the valve seat sealing gasket; a water inlet is further provided at the bottom edge of the valve seat, and a water outlet is provided at the center of the bottom of the valve seat; a valve seat fixing retaining ring is provided below the valve seat for fixing the valve seat and adjusting the sealing performance between the valve seat and the water path control disk, and two vertical keys are further provided on the outer side of the valve seat, and the two keys are matched with key grooves in the filter flange.

[0014] Preferably, as a further feasible solution, a filter bottle assembly is further included, and a filter screen assembly is loaded inside the filter bottle assembly.

[0015] Preferably, as a further feasible solution, the filter screen assembly is seamlessly connected to the water outlet at the center of the bottom of the valve seat.

[0016] During the working process of the pre-filter of the present invention, first, by rotating the multi-way valve operation knob, the multi-way valve operation knob drives the water path control disk to switch to different working positions, realizing operations of running, closing, and bypassing.

[0017] When the pre-filter is in the running state, the process is as follows: Rotate the arrow of the multi-way valve operation knob to the marked running position. The positioning beads set on the multi-way valve operation knob will rotate with the multi-way valve control knob. Then, when reaching the specified position, the positioning beads will be fixed at the positioning pits in the valve position limiting groove at the top of the filter flange. Then, the multi-way valve operation knob will drive the valve position control shaft to rotate the waterway control disc. A valve position control shaft gasket is provided between the valve position control shaft and the waterway control disc and fixed with screws, which can well achieve the seamless connection between the valve position control shaft and the waterway control disc, so that the valve position control shaft can drive the waterway control disc to rotate. After the waterway control disc is rotated, since there are a waterway control disc gasket, a waterway control disc moving ceramic piece, a valve seat moving ceramic piece, and a valve seat gasket arranged in sequence from top to bottom between the waterway control disc and the valve seat, the waterway control disc can rotate flexibly, thus realizing the switching of the waterway. The waterway control disc gasket and the valve seat gasket can achieve the dynamic sealing between the waterway control disc and the valve seat assembly, while the waterway control disc moving ceramic piece and the valve seat moving ceramic piece can well achieve the flexible rotation between the two. When the waterway channel in the valve seat is switched to the running channel, the water source will enter the inlet channel of the valve seat from the water inlet on the side of the filter flange. After entering the valve seat, the water source flows into the cavity of the filter bottle assembly through the water inlet arranged at the bottom edge. The flowing water source is filtered by the filter screen assembly loaded inside the filter bottle assembly. The filtered water source will flow into the valve seat from the water outlet at the center of the bottom of the valve seat, pass through the outlet connector to the filter flange, and then the water source will flow out through the water outlet on the side of the filter flange. At this time, the channel inside the valve seat is in the filtering state.

[0018] When the pre-filter is in the closed state, the process is as follows: Rotate the arrow of the multi-way valve operation knob to the marked closed position, so that the positioning bead at the bottom of the multi-way valve operation knob aligns with the positioning pit fixed position in the valve position limiting groove in the closed state. At this time, the multi-way valve operation knob will drive the waterway control disc to switch the waterway channel in the valve seat. At this time, the waterway channel in the valve seat is in the closed channel, and the water source will enter the inlet waterway channel in the valve seat from the water inlet on the side of the filter flange and stand still, while the water outlet at the bottom and the water outlet on the side of the valve seat are in the closed state.

[0019] When the pre-filter is in the bypass state, the process is as follows: Rotate the arrow of the multi-way valve operation knob to the marked bypass position so that the positioning bead at the bottom of the multi-way valve operation knob aligns with the positioning pit in the valve position limit groove in the bypass state to fix the working position. At this time, the multi-way valve operation knob drives the control shaft to rotate the waterway control disc to switch the waterway channel in the valve seat assembly. At this time, the waterway channel is in the bypass channel. The water source enters the interior of the filter flange from the water inlet on the side of the filter flange, and then enters the internal channel of the valve seat assembly through the water inlet on the side of the valve seat via the water inlet connector. The water source flows into the waterway channel inside the valve seat and then flows out from the water outlet on the side of the valve seat. At this time, both the inlet and outlet ports at the bottom of the valve seat are in the closed state.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] (1) A pre-filter provided by the present utility model can, by setting a multi-way valve device, freely switch the waterway to clean or repair the pre-filter without closing the main valve, and the normal household water use is not affected throughout the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a pre-filter of the present utility model;

[0023] Figure 2 is a structural diagram of a pre-filter of the present utility model;

[0024] Figure 3 is a structural diagram of the valve position control shaft of a pre-filter of the present utility model;

[0025] Figure 4 is a structural diagram of the waterway control disc of a pre-filter of the present utility model, where a is the bottom structure of the waterway control disc and b is the top structure of the waterway control disc;

[0026] Figure 5 is a structural diagram of the valve seat of a pre-filter of the present utility model, where a is the bottom structure of the valve seat and b is the top structure of the valve seat;

[0027] Figure 6 is the structure of the filter flange in a pre-filter of the present utility model;

[0028] Figure 7 is a schematic diagram of the operating state of a pre-filter of the present utility model;

[0029] Figure 8 is a schematic diagram of the closed state of a pre-filter of the present utility model;

[0030] Figure 9Schematic diagram of the bypass working state of a pre-filter of the present utility model.

[0031] 1. Filter housing; 2. Multi-way valve operation knob; 3. Water inlet; 4. Water outlet; 5. Valve position control shaft; 6. Screw; 7. Waterway control disc; 8. Water outlet connector; 9. Water outlet; 10. Valve seat; 11. Water inlet connector; 12. Water inlet; 13. Valve seat fixing retaining ring; 14. Filter screen assembly; 15. Filter bottle assembly; 16. Valve position control shaft sealing ring; 17. Valve position control shaft moving pad; 18. Valve position control shaft gasket; 19. Waterway control disc gasket; 20. Waterway control disc moving ceramic piece; 21. Valve seat moving ceramic piece; 22. Valve seat gasket; 23. Water outlet; 24. Filter flange. Specific embodiments

[0032] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the following described embodiments are some embodiments of the present utility model, rather than all embodiments, and are only used to illustrate the present utility model and should not be construed as limiting the scope of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work fall within the scope of protection of the present utility model.

[0033] In the description of the present utility model, it should be understood that terms such as "top", "bottom", "inside", "edge", etc. indicating orientation or positional relationships are only for convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0034] In order to more clearly illustrate the technical solutions in the present utility model, the following will be described in the form of specific embodiments.

[0035] Embodiment 1

[0036] Please refer to the attached Figures 1-7 As shown, the present utility model is a pre-filter, which includes a filter housing 1. A multi-way valve operation knob 2 is provided at the top of the filter housing 1. A filter flange 24 is provided below the multi-way valve operation knob 2. A water inlet 3 and a water outlet 4 are provided on both sides of the filter flange 24. Inside the filter flange 24, there are a valve position control shaft 5, a waterway control disc 7 and a valve seat 10 arranged in sequence from top to bottom.

[0037] The bottom of the filter flange 24 is provided with a connection port, and there are multiple layers of internal threads inside the connection port, which can screw-connect the filter flange 24 and the filter bottle assembly 15; the top of the filter flange 24 is provided with a shaft hole and a valve position limiting groove, and the bottom of the valve position limiting groove is provided with a positioning pit, while the top of the valve position control shaft 5 is provided with a threaded hole. After the valve position control shaft 5 passes through the shaft hole at the top of the filter flange 24, the multi-way valve operation knob 2 can be fixed through the threaded hole at the top of the valve position control shaft 5, connecting the two together. And the bottom of the multi-way valve operation knob 2 is provided with a positioning bead, which can move within the valve position limiting groove provided at the top of the filter flange 24.

[0038] A protrusion is provided at the center of the top of the valve position control shaft 5, the top of the protrusion is hexagonal, and two radial sealing grooves are provided in the middle section of the protrusion for placing the valve position control shaft sealing ring 16. A groove is provided at the root of the protrusion for placing the valve position control movement pad 17. And an installation hole is provided below the valve position control shaft 5, and the water path control disc 7 and the valve position control shaft 5 are fixedly connected by using screws 6.

[0039] The bottom of the water path control disc 7 is provided with a groove, and a water path control disc sealing pad 19 is placed in the groove. Below the water path control disc sealing pad 19, a water path control disc moving ceramic sheet 20 is also placed. The combination of the two can achieve dynamic sealing between the water path control disc and the valve seat 10. And because the water path control disc moving ceramic sheet 20 is placed below the water path control disc sealing pad 19, when the water path control disc 7 rotates, it can rotate flexibly on the valve seat 10; a groove is also provided at the upper end of the water path control disc 7, and the valve position control shaft sealing pad 18 is placed in this groove. Due to the presence of the valve position control shaft sealing pad 18, there is a seamless connection between the valve position control shaft 5 and the water path control disc, and the two are closely connected, which can well let the valve position control shaft 5 drive the water path control disc 7 to rotate.

[0040] Water inlets 12 and outlets 9 are provided on both sides of the valve seat 10. An inlet connector 11 is connected to the water inlet 12, and an outlet connector 8 is connected to the outlet 9 for introducing a water source into the valve seat. And a groove is provided at the upper end of the valve seat 10, a valve seat sealing pad 22 is placed at the bottom of the groove, and a valve seat moving ceramic sheet 21 is placed above the valve seat sealing pad. Such a setting can achieve dynamic sealing between the valve seat 10 and the water path control disc 7, and at the same time, can well let the water path control disc 7 rotate on the valve seat 10, so as to smoothly switch the water path channels.

[0041] Below the filter flange 24 is the filter bottle assembly 15. Inside the filter bottle assembly 15 is loaded with a filter mesh assembly 14 for filtering the water source flowing into the filter housing 1. The filter mesh assembly 15 is connected to the central water outlet at the bottom of the valve seat 10, and a valve seat fixing retaining ring 13 is provided at the bottom of the valve seat 10 to fix the valve seat and adjust the sealing performance between the valve seat 10 and the water path control panel 7, so that there is a seamless connection between the filter mesh assembly 14 and the valve seat 10.

[0042] Among them, in the appendix Figure 3 is a schematic structural diagram of the valve position control shaft 5 of the present invention. In the figure, the structure of the valve position control shaft 5 in the present invention can be clearly seen.

[0043] Figure 4 is a schematic structural diagram of the water path control panel 7 of the present invention. Among them, Figure 4 Figure a in shows the bottom schematic diagram of the water path control panel 7, and Figure b shows the top schematic diagram of the water path control panel 7;

[0044] Figure 5 is a schematic structural diagram of the valve seat 10 of the present invention. Among them, Figure 5 Figure a in shows the bottom schematic diagram of the valve seat 10, and Figure b shows the top schematic diagram of the valve seat 10.

[0045] Among them, the pre-filter of the present invention has three working states. Refer to Figure 7 The specific working principle is as follows:

[0046] (1) When the pre-filter is in the running state

[0047] First, rotate the arrow of the multi-way valve operating knob 2 to the marked operating position, so that the positioning bead on the multi-way valve operating knob 2 runs in the valve position limiting groove and falls into the positioning pit after reaching the working position. The multi-way valve operating knob 2 will drive the valve position control shaft 5 to rotate. Since the valve position control shaft gasket is arranged between the valve position control shaft 5 and the water path control disc 7 and fixed with screws 6, the valve position control shaft 5 and the water path control disc 7 are tightly connected. Therefore, the rotation of the valve position control shaft 5 will drive the water path control disc 7 to rotate. Due to the water path control disc gasket 19, the water path control disc moving ceramic sheet 20, the valve seat moving ceramic sheet 21 and the valve seat gasket 22 arranged in sequence from top to bottom between the water path control disc 7 and the valve seat 10, the water path control disc 7 can rotate flexibly on the valve seat 10 while achieving dynamic sealing between the water path control disc 7 and the valve seat 10, so that the valve seat 10 switches the water path channel to the operating channel. At this time, the water source will enter the interior of the filter housing 1 from the water inlet 3 on the side of the filter flange 24, and then enter the interior of the valve seat 10 through the water inlet connecting piece 11 on the side of the valve seat 10. After entering the valve seat 10, the water source will flow into the cavity of the filter bottle assembly 15 through the water inlet arranged at the bottom edge thereof, and then the flowing water source will be filtered by the filter screen assembly 14 loaded inside the filter bottle assembly 15. The filtered water source will flow into the valve seat 10 through the water outlet 23 arranged at the center of the bottom of the valve seat, pass through the water outlet connecting piece 8, and finally the filtered water source will flow out through the water outlet 4 on the side of the filter flange 24. The specific working process is as Figure 7 shown.

[0048] (2) When the pre-filter is in the closed state

[0049] Rotate the arrow of the multi-way valve operating knob 2 to the marked closed position, so that the positioning bead on the multi-way valve operating knob 2 runs in the valve position limiting groove and falls into the positioning pit for fixation after reaching the working position. At this time, the multi-way valve operating knob 2 will drive the water path control disc 7 to switch the water path channel inside the valve seat 10. At this time, the water path channel inside the valve seat 10 is in the closed water path channel, and the water source will enter the water inlet channel inside the valve seat from the water inlet on the side of the filter flange and stand still. At this time, no water flows out of the pre-filter. The specific working process is as Figure 8 shown.

[0050] (3) When the pre-filter is in the bypass state

[0051] Rotate the operation knob 2 of the rotary multi-way valve so that the arrow points to the marked bypass position, causing the positioning bead on the operation knob 2 of the multi-way valve to run in the valve position limit groove and fall into the positioning pit for fixation after reaching the working position. At this time, the operation knob 2 of the multi-way valve will drive the valve position control shaft 5 to rotate, and the water path control disc 7 will switch the water path channel in the valve seat 10. At this time, the water path channel is in the bypass channel. The water source enters the interior of the filter flange through the water inlet 3 provided on the side of the filter flange 24, and then enters the interior of the valve seat 10 through the water inlet connector 11 on the side of the valve seat 10. The water source flows into the water path channel inside the valve seat 10 and then flows out through the water outlet connector 8 on the side of the valve seat 10. At this time, the water inlets and outlets at the bottom of the valve seat are both closed. The specific working process is as Figure 9 shown.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pre-filter, characterized in that, It includes a filter housing; wherein, a multi-way valve operation knob is arranged at the top of the filter housing; a filter flange is arranged below the multi-way valve operation knob; inside the filter flange, a valve position control shaft, a waterway control disc and a valve seat are sequentially arranged from top to bottom. A threaded hole is arranged at the center of the top of the valve position control shaft, and the multi-way valve operation knob is connected to the valve position control shaft through the threaded hole; a shaft hole and a valve position limiting groove are arranged at the top of the filter flange, and the valve position control shaft passes through the shaft hole and is connected to the multi-way valve operation knob; multiple waterway channels are arranged inside the valve seat.

2. The pre-filter according to claim 1, characterized in that, An inlet and an outlet are respectively arranged on both sides of the filter flange; a connection port is arranged at the bottom of the filter flange, and multiple layers of internal threads are arranged inside the connection port for screwing and connecting the filter bottle assembly with the filter flange through the multiple layers of internal threads.

3. The pre-filter according to claim 1, wherein The valve position control shaft and the bottom flange are integrated. A protrusion is arranged at the center of the bottom of the valve position control shaft, and the top end of the protrusion is hexagonal. The hexagonal shape at the top end of the protrusion of the valve position control shaft meshes with the multi-way valve operation knob.

4. The pre-filter according to claim 3, characterized in that, Multiple radial sealing grooves are arranged on the middle section shaft of the protrusion for placing multiple valve position control shaft sealing rings; a groove is arranged at the root of the protrusion for placing a valve position control shaft movement pad.

5. The pre-filter according to claim 1, characterized in that, A positioning bead is arranged at the bottom of the multi-way valve operation knob, and the positioning bead corresponds to the valve position limiting groove. A positioning pit is arranged at the bottom of the valve position limiting groove.

6. The pre-filter according to claim 1, wherein A groove is arranged at the bottom of the waterway control disc, and a waterway control disc sealing pad and a waterway control disc movement ceramic sheet are placed in the groove for realizing dynamic sealing with the valve seat.

7. The pre-filter according to claim 6, characterized in that, A groove is arranged at the upper end of the waterway control disc, and a valve position control shaft sealing pad is arranged in the groove for realizing seamless connection between the waterway control disc and the valve position control shaft.

8. The pre-filter according to claim 1, characterized in that, Inlets and outlets are arranged on both sides of the valve seat. The inlets and outlets are respectively connected to an inlet connection part and an outlet connection part, and multiple sealing rings are arranged on the inlet connection part and the outlet connection part. The sealing rings are used for seamlessly connecting between the valve seat and the inlets and outlets of the filter flange, so that the water source can enter the inside of the valve seat and the water source can be output from the valve seat; a groove is arranged at the upper end of the valve seat, a valve seat sealing pad is arranged at the bottom of the groove, and a valve seat movement ceramic sheet is arranged on the valve seat sealing pad; an inlet is further arranged at the bottom edge of the valve seat, and an outlet is further arranged at the center of the bottom of the valve seat; a valve seat fixing retaining ring is arranged below the valve seat.

9. The pre-filter according to claim 2, wherein It further includes a filter bottle assembly, and a filter mesh assembly is loaded inside the filter bottle assembly.

10. The pre-filter according to claim 9, characterized in that, The filter mesh assembly realizes seamless connection with the outlet at the center of the bottom of the valve seat.

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