Pre-filter

Abstract

The utility model discloses a pre-filter which comprises a valve body and a filter main body, the valve body is provided with a water inlet and a water outlet, and the filter main body is detachably connected to the valve body and is provided with a raw water cavity and a purified water cavity; the switching valve element can be arranged in the valve body in a mode of rotating around the axis and is provided with a first water passing channel, a second water passing channel and a third water passing channel, the filter body and the switching valve element are arranged in a linkage mode, so that the switching valve element is driven by the filter body to rotate, and when the filter body is installed in place, the switching valve element is closed. The raw water cavity of the filter main body is communicated with the water inlet through a second water passing channel, and the purified water cavity of the switching filter main body is communicated with the water outlet through a third water passing channel; when the filter main body is detached, the switching valve core is driven to rotate, so that the switching valve core rotates until only the first water passing channel is communicated with the water inlet and the water outlet. The water filter is strong in scene adaptability, and after the filter main body is detached, the valve body can still be used for water supply, so that normal water supply of families is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter field especially relates to a prefilter. BACKGROUND

[0002] The conventional prefilter needs to change the pipeline to install. If the user does not consider using the prefilter before decoration, and adopts the hidden pipe laying, the pipeline change is very big if the prefilter needs to be installed later, thus generating the high installation cost. Moreover, the prefilter can only be installed on the horizontally arranged pipeline, and has the water flow direction requirement, and the ordinary consumer basically cannot install by oneself. When the fault needs to be maintained, due to the installation space limitation, the filter is complex to disassemble or cannot be disassembled at all. And when the after-sales maintenance, the water valve needs to be closed, and the whole house is water-stopped during the maintenance.

[0003] The existing prefilter with the universal head structure solves the installation pipeline limitation and the water flow direction problem, but still has the disassembly difficulty problem when maintaining, and needs the special tool to disassemble (the disassembly tool that needs to be randomly distributed when maintaining is already unknown). Meanwhile, when the prefilter is maintained, disassembling the prefilter will cause the tap water pipeline to be unable to use, needs to close the water gate, and faces the whole house water-stopped during the maintenance. UTILITY MODEL CONTENTS

[0004] The utility model provides a prefilter in view of the technical problem of prior art, scene adaptability is strong, and when the filter main part is invalid or is damaged, the valve body can still pass water after the filter main part is disassembled, and the tap water pipeline does not need to be water-stopped, and does not affect the normal water supply of the family.

[0005] The utility model solves its technical problem adopts the technical scheme that a prefilter, including valve body and filter main part, valve body is equipped with water inlet and water outlet, and filter main part is detachably connected in valve body and is equipped with raw water cavity and clean water cavity, still including switching valve core, switching valve core is rotatably arranged in valve body and is equipped with first water passage, second water passage and third water passage, and filter main part is linked with switching valve core and is set up, makes switching valve core drive rotation by filter main part, and when filter main part is installed in place, the raw water cavity of filter main part is connected with water inlet through second water passage, and the clean water cavity of filter main part is connected with water outlet through third water passage, when filter main part is disassembled, drives switching valve core to rotate, makes switching valve core rotate and only makes first water passage of switching valve core connect water inlet and water outlet.

[0006] Further, the rotation limiting structure is arranged between the valve body and the switching valve core to limit the maximum rotation angle of the switching valve core.

[0007] Further, the maximum rotation angle of the switching valve core is 90 degrees.

[0008] Further, the rotation limiting structure comprises an arc-shaped slot arranged on the valve body and a limiting protrusion arranged on the switching valve core in correspondence, the arc-shaped slot is arranged along the rotation direction of the switching valve core, and the limiting protrusion is slidingly fitted in the arc-shaped slot.

[0009] Further, the filter body is rotatably connected to the valve body, so that the filter body is disassembled and rotated by rotation, and the rotation axis of the filter body coincides with the rotation axis of the switching valve core.

[0010] Further, a linkage structure is arranged between the filter body and the switching valve core, the linkage structure comprises a protrusion and a groove which are mutually inserted and fitted, the protrusion is arranged on one of the switching valve core and the filter body, and the groove is arranged on the other one of the switching valve core and the filter body.

[0011] Further, the valve body is screwedly connected with the filter body, or the valve body is threadedly connected with the filter body.

[0012] Further, the outer circumferential surface of the switching valve core is provided with a first port, a second port, a third port and a fourth port which are arranged along the circumferential surface, the switching valve core is provided with a first opening and a second opening at one end thereof in the axial direction and towards the filter body, the first port and the second port constitute two ports of a first water passing channel, the third port and the first opening constitute two ports of a second water passing channel, and the fourth port and the second opening constitute two ports of a third water passing channel.

[0013] Further, the outer circumferential surface of the switching valve core is sleeved with a connected sealing member, the connected sealing member comprises sealing rings which are arranged in correspondence with the first port, the second port, the third port and the fourth port.

[0014] Further, the filter body comprises a filter bottle, a filter core and a valve head, the filter core is arranged in the filter bottle, the valve head is connected to one end of the filter bottle, and the three are mutually matched to form a raw water cavity and a clean water cavity; the valve head is detachably connected with the valve body, and the connecting position of the valve head and the valve body is located on the side surface of the valve head.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The switching valve core can be driven to rotate by the filter main body, when the filter main body is installed in place, the raw water cavity of the filter main body is connected with the water inlet through the second water passage, the clean water cavity of the filter main body is connected with the water outlet through the third water passage, so that the normal filtering water function can be realized, when the filter main body is disassembled, the switching valve core is driven to rotate, the switching valve core is rotated to only make the first water passage of the switching valve core connect the water inlet and the water outlet, so that the water inlet and the water outlet are directly connected, so that when the filter main body is invalid or damaged, the valve body can still pass water after the filter main body is disassembled, and the domestic water pipeline does not need to be cut off, and the domestic water pipeline water supply is not affected.

[0017] 2. A rotation limiting structure is arranged between the valve body and the switching valve core, so that the maximum rotation angle of the switching valve core is limited, so that the switching valve core is prevented from rotating too much to cause the water passage to be unable to be connected.

[0018] 3. The valve body and the filter main body are screwedly connected, or the valve body and the filter main body are threadedly connected, so that the installation and disassembly of the filter main body are facilitated.

[0019] 4. The switching valve core is sleeved with a connected sealing element, the connected sealing element comprises sealing rings arranged correspondingly to the first port, the second port, the third port and the fourth port, the connected sealing element can effectively prevent the port sealing ring from deviating and falling off during installation and rotation, and can ensure the sealing property of the valve body and prevent water leakage.

[0020] The utility model will be further explained in detail in combination with the drawings and examples; but the utility model discloses a front filter not limited to the examples. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the exploded schematic view of the utility model;

[0022] Figure 2 It is the three-dimensional structure schematic view of the utility model;

[0023] Figure 3 It is the front view of the valve body of the utility model; Figure 1 (not install the filter main body);

[0024] Figure 4 It is Figure 3 the section view along A-A;

[0025] Figure 5 It is the front view of the valve body of the utility model; Figure 2 (install the filter main body);

[0026] Figure 6 It is Figure 5 the section view along B-B;

[0027] Figure 7 is a sectional view of the utility model;

[0028] Figure 8 is a partial sectional view of the valve body of the utility model Figure 1 (not installed filter body);

[0029] Figure 9 is a partial sectional view of the valve body of the utility model Figure 2 (installed filter body);

[0030] Figure 10 is a partial sectional view of the utility model Figure 1 ;

[0031] Figure 11 is a three-dimensional structure schematic view of the valve body of the utility model;

[0032] Figure 12 is a three-dimensional structure schematic view of the switching valve core of the utility model Figure 1 ;

[0033] Figure 13 is a sectional view of the valve body of the utility model;

[0034] Figure 14 is a three-dimensional structure schematic view of the switching valve core of the utility model Figure 2 (turn over an angle);

[0035] Figure 15 is a three-dimensional structure schematic view of the valve head of the utility model; Figure 1 ;

[0036] Figure 16 is a three-dimensional structure schematic view of the valve body of the utility model;

[0037] Figure 17 is a three-dimensional structure schematic view of the valve head of the utility model Figure 2 (back face faces forward);

[0038] Figure 18 is a sectional view of the clamping groove and the clamping convex matching portion of the utility model Figure 1 (not installed filter);

[0039] Figure 19 is a sectional view of the clamping groove and the clamping convex matching portion of the utility model Figure 2 (installed filter);

[0040] Figure 20 is an exploded view of the switching valve core and the connected sealing element of the utility model;

[0041] Figure 21 is a structure schematic view of the valve body of the utility model is horizontally installed;

[0042] Figure 22 is the local section view of the filter body of the utility model Figure 1 (valve body is horizontal installation);

[0043] Figure 23 is the structure diagram of the utility model's valve body vertical installation;

[0044] Figure 24 is the local section view of the filter body of the utility model Figure 2 (valve body is vertical installation);

[0045] In the figure: 1, valve body;11, water inlet;12, water outlet;13, connecting port;14, arc slot;15, clamping groove;16, threaded insert;17, gland;18, screw;19, valve body;2, filter body;21, filter bottle;22, filter core;23, valve head;231, convex part;232, clamping convex;233, raw water inlet;234, clean water outlet;24, raw water cavity;25, clean water cavity;3, switching valve core;31, first water passage;32, second water passage;33, third water passage;34, first port;35, second port;36, third port;37, fourth port;38, first opening;39, second opening;310, limiting convex part;311, groove;312, mounting groove;313, circular convex rib;4, connected sealing element;41, sealing ring;5, sealing ring;6, blowdown valve;7, water supply pipeline. DETAILED DESCRIPTION

[0046] In the utility model, the terms "first", "second", "third", "fourth" and the like are only used to distinguish similar objects, and are not used to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. In the description, the directions or position relationships indicated by "up", "down", "left", "right", "inner", "outer", "top", "bottom" and the like are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the utility model, and are not used to indicate or imply that the devices must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the protection scope of the utility model. For ordinary skilled persons in the art, the specific meanings of the above terms in the application can be understood according to the specific circumstances.

[0047] In addition, in the description of the utility model, unless there is another explicit provision and limitation, the terms "mount", "set", "sleeve / interface", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements, for the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0048] Please see Figures 1-24 As shown in the figure, the utility model relates to a kind of prefilter, including valve body 1 and filter main body 2, valve body 1 is equipped with water inlet 11 and water outlet 12, filter main body 2 is detachably connected in valve body 1 and is equipped with raw water cavity 24 and clean water cavity 25.It also includes switching valve core 3, switching valve core 3 is rotatably arranged in valve body 1 and is equipped with first water passage 31, second water passage 32 and third water passage 33, filter main body 2 and switching valve core 3 are linked to set, make switching valve core 3 be driven to rotate by filter main body 2, and filter main body 2 is installed in place, and the raw water cavity 24 of filter main body 2 is connected water inlet 11 by second water passage 32, and the clean water cavity 25 of filter main body 2 is connected water outlet 12 by third water passage 33.Filter main body 2 is removed and drives switching valve core 3 to rotate, make switching valve core 3 rotate to only make its first water passage 31 connect water inlet 11 and water outlet 12.

[0049] Rotary limiting structure is arranged between valve body 1 and switching valve core 3 to limit the maximum rotation angle of switching valve core 3.Specifically, the maximum rotation angle of switching valve core 3 is 90 degrees. Figures 11-13 As shown in the figure, rotary limiting structure includes arc-shaped groove 14 arranged on valve body 1 and limiting convex part 310 correspondingly arranged on switching valve core 3, and arc-shaped groove 14 is arranged along the rotation direction of switching valve core 3, and limiting convex part 310 is slidably fitted in arc-shaped groove 14.

[0050] Filter main body 2 is rotatably connected to valve body 1, so that filter main body 2 is detachably connected by rotating and drives switching valve core 3 to rotate, and the rotation axis of filter main body 2 coincides with the rotation axis of switching valve core 3.While filter main body 2 and switching valve core 3 are linked, filter main body 2 and switching valve core 3 are sealed by sealing ring 5.Filter main body 2 and switching valve core 3 are arranged with linkage structure, as Figure 14 、 Figure 15 As shown in the figure, linkage structure includes convex part 231 and recess 311 that are mutually inserted and fitted, convex part 231 is arranged on filter main body 2, and recess 311 is arranged on switching valve core 3.In other embodiments, recess is arranged on filter main body, and convex part is arranged on switching valve core.

[0051] In this embodiment, the valve body 1 is screw-coupled with the filter body 2. Specifically, as shown in Figures 16-19 the valve body 1 is provided with a connecting port 13, and the connecting port 13 is provided with a clamping groove 15. The valve body 1 is provided with a clamping convex 232 arranged correspondingly, and the clamping convex 232 is screw-coupled with the clamping groove 15. In other embodiments, the valve body and the filter body can be screw-coupled.

[0052] The outer circumferential surface of the switching valve core 3 is provided with a first port 34, a second port 35, a third port 36 and a fourth port 37 arranged along the circumferential direction thereof. The switching valve core 3 is provided with a first opening 38 and a second opening 39 at one end thereof in the axial direction thereof towards the filter body 2. The first port 34 and the second port 35 constitute two ports of the first water passage 31, the third port 36 and the first opening 38 constitute two ports of the second water passage 32, and the fourth port 37 and the second opening 39 constitute two ports of the third water passage 33.

[0053] The outer circumferential surface of the switching valve core 3 is sleeved with a connected sealing member 4, which includes sealing rings 41 arranged correspondingly to the first port 34, the second port 35, the third port 36 and the fourth port 37. Each sealing ring 41 is adapted to the outer periphery of the corresponding port and protrudes from the outer circumferential surface of the switching valve core 3. The outer circumferential surface of the switching valve core 3 is further provided with a mounting groove 312, and the connected sealing member 4 is mounted in the mounting groove 312. The side of the switching valve core 3 away from the filter body 2 is further provided with a circular convex rib 313 extending along the circumferential direction of the switching valve core 3, and the circular convex rib 313 is in contact with the inner wall surface of the valve body 1, so that the contact position of the valve body 1 and the switching valve core 3 changes from surface contact to line contact, which can effectively reduce the frictional force in the rotation process.

[0054] The valve body 1 includes a valve body 19, a threaded insert 16 and a gland 17. The threaded insert 16 is fixed at both ends of the valve body 19 and forms the water inlet 11 and the water outlet 12, and the valve body 1 is connected with the tap water pipeline 7 through the threads on the outer surface of the threaded insert 16. The gland 17 is connected with the valve body 19 through a screw 18, and the switching valve core 3 is fixed between the gland 17 and the valve body 19.

[0055] The filter body 2 comprises a filter bottle 21, a filter core 22 and a valve head 23, the filter core 22 is arranged in the filter bottle 21, the valve head 23 is connected at one end of the filter bottle 21, and the three are matched to form a raw water cavity 24 and a clean water cavity 25. The valve head 23 is detachably connected with the valve body 1, and the connection position of the valve head 23 and the valve body 1 is located at the side of the valve head 23. The convex part 231 and the clamping convex part 232 are arranged on the valve head 23, the convex part 231 is located at the upper and lower ends of the side of the valve head 23, and the valve head 23 is provided with a raw water inlet 233 communicating with the raw water cavity 24 and a clean water outlet 234 communicating with the clean water cavity 25, the raw water inlet 233 communicates with the first opening 38, and the clean water outlet 234 communicates with the second opening 39. The bottom of the filter body 2 is also provided with a blowdown valve 6 to realize the flushing and blowdown function.

[0056] Specifically, the installation mode of the valve body 1 is different, and the convex part 231 and the clamping convex part 232 of the filter body 2 are arranged inconsistently, as shown in the drawings, Figure 21 、 Figure 22 When the valve body 1 is horizontally installed, the convex part 231 of the filter body 2 is located at the upper and lower ends of the valve head 23, and the clamping convex part 232 of the filter body 2 is located at the left and right ends of the valve head 23, so that the filter body 2 is installed on the valve body 1 in a vertical state. As shown in the drawings, Figure 23 、 Figure 24 When the valve body 1 is vertically installed, the convex part 231 of the filter body 2 is located at the left and right ends of the valve head 23, and the clamping convex part 232 of the filter body 2 is located at the upper and lower ends of the valve head 23, so that the filter body 2 is installed on the valve body 1 in a vertical state.

[0057] The pre-filter of the utility model, when connecting the tap water pipeline 7, according to the on-site pipe arrangement, the corresponding valve body 1 installation mode (horizontal / vertical installation) is selected, the threaded inserts 16 at both ends of the valve body 1 are connected with the tap water pipeline 7 respectively. According to the installation mode of the valve body 1, the filter body 2 is selected, the valve head 23 of the filter body 2 is placed in the connecting port 13 of the valve body 1, the convex part 231 is matched with the groove 311, it is rotated 90 degrees, the clamping convex part 232 of the filter body 2 enters the clamping groove 15 of the valve body 1, the installation and fixation of the filter body 2 are completed, at the same time, the switch valve core 3 is switched, the water inlet 11 and the water outlet 12 of the valve body 1 are communicated with the filter body 2. After the installation of the filter body 2 is completed, when blowdown is needed, the blowdown valve 6 on the bottom of the filter body 2 is directly opened, and the flushing and blowdown function can be realized; when a fault occurs or the filter bottle 21 of the filter body 2 needs to be disassembled for maintenance, the filter body 2 is directly rotated 90 degrees reversely, when the clamping convex part 232 on the filter body 2 is completely separated from the clamping groove 15 on the valve body 1, the filter body 2 can be taken out. At the same time, the switch valve core 3 is also changed, directly making the water inlet 11 and the water outlet 12 communicate.

[0058] The utility model discloses a prefilter, scene adaptability is strong, valve body 1 can install horizontally, install vertically, and there is no request to waterway flow direction, and filter main part 2 can directly spin into spin valve body 1, and dismouting is convenient, and it is convenient for maintenance. When installing, need not change tap water pipeline 7, after valve body 1 installation, user thinks any time and adds filter main part 2, and after -sales maintenance is convenient, when filter main part 2 failure or damage, just can take out filter main part 2, and tap water pipeline 7 does not need to cut off water, does not influence the water supply of family.

[0059] The utility model discloses a prefilter, and the part not involved is same as prior art or can adopt prior art to realize.

[0060] The above embodiment is only used to further illustrate the prefilter of the utility model, but the utility model is not limited to the embodiment, and any simple modification, equivalent change and modification made according to the technical essence of the utility model to the above embodiment all fall into the protection scope of the technical scheme of the utility model.

Claims

1. A pre-filter comprising a valve body provided with a water inlet and a water outlet, and a filter body detachably connected to the valve body and provided with a raw water cavity and a purified water cavity; characterized in that: The switching valve core is rotatably arranged in the valve body and is provided with a first water passage, a second water passage and a third water passage; the filter body is arranged in linkage with the switching valve core, so that the switching valve core is driven to rotate by the filter body; when the filter body is installed, the raw water cavity of the filter body is communicated with the water inlet through the second water passage, and the purified water cavity of the filter body is communicated with the water outlet through the third water passage; when the filter body is removed, the switching valve core is rotated, so that the switching valve core is rotated to only make the first water passage thereof communicated with the water inlet and the water outlet.

2. The prefilter of claim 1, wherein: Rotation limiting structure is arranged between the valve body and the switching valve core to limit the maximum rotation angle of the switching valve core.

3. The prefilter of claim 2, wherein: The maximum rotation angle of the switching valve core is 90 degrees.

4. The prefilter of claim 2 or 3, wherein: The rotation limiting structure comprises an arc-shaped slot arranged on the valve body and a limiting protrusion correspondingly arranged on the switching valve core; the arc-shaped slot is arranged along the rotation direction of the switching valve core; and the limiting protrusion is slidingly fitted in the arc-shaped slot.

5. The prefilter of claim 1, wherein: The filter body is rotatably connected to the valve body, so that the filter body is removed and rotated by rotating, and the switching valve core is rotated.

6. The prefilter of claim 1 or 5, wherein: Linkage structure is arranged between the filter body and the switching valve core; the linkage structure comprises a protrusion and a groove which are mutually inserted and fitted; the protrusion is arranged on one of the filter body and the switching valve core; and the groove is arranged on the other one of the filter body and the switching valve core.

7. The prefilter of claim 5, wherein: The valve body is screwedly connected with the filter body.

8. The prefilter of claim 1, wherein: The outer circumferential surface of the switching valve core is provided with a first port, a second port, a third port and a fourth port which are arranged along the circumferential surface of the switching valve core; the switching valve core is provided with a first opening and a second opening at one end thereof in the axial direction and towards the filter body; the first port and the second port constitute two ports of the first water passage; the third port and the first opening constitute two ports of the second water passage; and the fourth port and the second opening constitute two ports of the third water passage.

9. The prefilter of claim 8, wherein: The outer circumferential surface of the switching valve core is sleeved with a connected sealing member which comprises sealing rings arranged correspondingly to the first port, the second port, the third port and the fourth port.

10. The prefilter of claim 1 or 5, wherein: The filter body comprises a filter bottle, a filter core and a valve head; the filter core is arranged in the filter bottle; the valve head is connected to one end of the filter bottle; and the three components are mutually matched to form the raw water cavity and the purified water cavity; the valve head is detachably connected with the valve body; and the connection part of the valve head and the valve body is located on the side surface of the valve head.

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