Pre-filter

Abstract

The utility model belongs to the technical field of filters, and particularly relates to a pre-filter. The pre-filter valve comprises a pre-filter valve head and a filter bottle, wherein the pre-filter valve head comprises a valve body, a three-way joint and a water diversion separator. The valve body comprises two connecting seats for connecting the filter bottle and a rotating seat positioned on the two connecting seats, and the bottom of the rotating seat is communicated with the interiors of the two connecting seats; the bottom end of the three-way joint is rotationally connected with the rotating seat; the two water diversion separators are respectively arranged in the two connecting seats, each water diversion separator comprises an outer separation sleeve which is matched and attached to the inner side surface of the corresponding connecting seat, an inner separation ring is arranged in each outer separation sleeve, and a middle channel communicated with the interiors of the two water diversion separators is arranged between the two connecting seats; the filter bottle is connected with the connecting seat, and a filter assembly is arranged in the filter bottle. The utility model is used for solving the problem that the filter valve head is in excessive contact with water flow.

Description

Technical Field

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

[0002] The pollution of drinking water is an issue that people are increasingly concerned about, and the pre-filter market is becoming more and more popular. The pre-filter is the first coarse filtration equipment for the water used in the whole house. It can filter out large particles such as mud, rust, insect eggs, and red worms in tap water.

[0003] At present, the pre-filter is generally installed on the pipe after the water meter. The common single-bottle filter on the market is easy to install, but its filtering effect is not very ideal. Therefore, when the single-bottle filter is difficult to meet the filtering needs, it is necessary to connect multiple filter bottles in series on the pipe after the water meter. On the one hand, it is troublesome to install multiple single-bottle filters. On the other hand, the current single-bottle filter cavity has a copper valve head connecting the filter bottle. The water flow contacts the inner wall of the valve head, which easily causes the water quality to taste poor after filtration. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a pre-filter for solving the problem that the valve head of the filter is in excessive contact with the water flow.

[0005] The present invention solves the above-mentioned technical problems with the following technical solutions: a pre-filter comprising:

[0006] A pre-filter valve head, the pre-filter valve head comprising:

[0007] The valve body includes two connecting seats for connecting the filter bottle and a rotating seat located on the two connecting seats, and the bottom of the rotating seat is connected to the interior of the two connecting seats;

[0008] A three-way joint, the bottom end of which is rotatably connected to the rotating seat, the three-way joint is provided with a flow guide, the flow guide having a first flow guide channel and a second flow guide channel that are not interconnected, the first flow guide channel connecting the water inlet end of the three-way joint and one of the connecting seats, and the second flow guide channel connecting the water outlet end of the three-way joint and the other connecting seat;

[0009] Two water-dividing isolators are respectively disposed in the two connecting seats, the water-dividing isolators comprising an outer isolating sleeve that matches and fits the inner side surface of the connecting seat, the outer isolating sleeve being provided with an inner isolating ring that separates the inner flow channel from the inner annular channel in the outer isolating sleeve, the water-dividing isolators corresponding to the connecting seats are provided with a water inlet that communicates with the inner annular channel or the inner flow channel, and an intermediate channel that communicates with the interiors of the two water-dividing isolators is provided between the two connecting seats;

[0010] A filter bottle is connected to the connecting seat. A filter assembly is provided in the filter bottle. The filter assembly divides the space in the filter bottle into a first filter cavity and a second filter cavity corresponding to the inner flow channel and the inner annular channel respectively.

[0011] Compared with the existing technology, the above technical solution has the following beneficial effects:

[0012] The water flow is guided from the inlet end through the first guide channel to the connecting seat by the guide member. The water-dividing isolator in the connecting seat serves to separate the water flow, so that the inner ring channel and the inner flow correspond to the first filter chamber and the second filter chamber respectively. After being filtered by the two filter bottles, the water flows out of the second guide channel, and the water flow path is smooth. On the other hand, the water-dividing isolator and the guide member serve to prevent the water flow from excessive contact with the inner wall of the connecting seat and the inner wall of the three-way joint, thereby avoiding problems such as impure water quality and poor taste, and improving water quality safety.

[0013] Based on the above technical solution, the embodiment of the present application can also be improved as follows:

[0014] In one embodiment, the filter assembly comprises:

[0015] A filter frame is provided in the filter bottle, and its top is matched and embedded in the inner isolation ring;

[0016] A cleaning frame is sleeved on the outside of the filter frame, with a gap for placing the filter formed between the cleaning frame and the filter frame;

[0017] The driving member is arranged at the bottom of the cleaning frame. The driving member is provided with an inclined flow guide channel so as to be driven by water flow to drive the cleaning frame to rotate.

[0018] The water flows through the inclined guide channel, driving the driving member to rotate, thereby driving the cleaning frame to rotate, thereby cleaning the filter on the filter frame.

[0019] In one embodiment, the cleaning skeleton comprises:

[0020] a mounting plate, wherein the mounting plate is provided with a mounting rod extending into the driving member;

[0021] A plurality of vertical ribs are arranged on the top of the periphery of the mounting plate, and a cleaning rubber strip is provided on the outer side of the vertical ribs for contacting the inner wall of the filter bottle;

[0022] The spiral ribs are arranged around the periphery of the mounting plate and are connected to a plurality of the vertical ribs in sequence.

[0023] By arranging a cleaning rubber strip that contacts and fits the inside of the filter bottle on the outside of the vertical rib, the cleaning rubber strip can rotate and clean the inner wall of the filter bottle when the cleaning frame rotates.

[0024] In one embodiment, the flow guide comprises:

[0025] An outer ring sleeve, the outer ring sleeve is fitted on the inner wall surface of the bottom end of the tee joint and is used to isolate the inner wall surface of the bottom end of the tee joint;

[0026] The inner ring sleeve is arranged in the outer ring sleeve and is used to separate the space in the outer ring sleeve into the first flow guide channel and the second flow guide channel.

[0027] The outer ring sleeve is fitted to the inner wall surface of the bottom end of the tee joint, which prevents excessive water flow from contacting the inner wall surface of the tee joint. Then the inner ring sleeve and the outer ring sleeve form a first guide channel and a second guide channel that do not contact each other to achieve guidance control of the water flow.

[0028] In one embodiment, a first sealing groove for accommodating a sealing ring is provided on the outer surface of the water-dividing isolator corresponding to the outer contour of the intermediate channel, and at least two second sealing grooves for accommodating a sealing ring are provided on the outer periphery of the water-dividing isolator, and the two second sealing grooves are located on both sides of the intermediate channel.

[0029] In one embodiment, a pipe pin is inserted into the middle channel, and third sealing grooves for placing sealing rings are opened on the outer peripheral surfaces of both ends of the pipe pin. The two third sealing grooves are respectively embedded in the two water-dividing isolation members.

[0030] By inserting a pipe pin, the exposed inner wall of the middle channel through which water flows from one water-dividing isolator to another is compensated, and the water can flow through the inside of the pipe pin, avoiding contact between the water flow and the inner wall of the middle channel.

[0031] In one embodiment, a pressure gauge interface is further provided on the valve body, and the pressure gauge interface is connected to the intermediate channel.

[0032] In one embodiment, the first end of the inner ring sleeve is matched and embedded in the other connecting seat, and the three-way joint is provided with an internal terminal head connected to the water outlet end of the three-way joint for matching and nesting with the second end of the inner ring sleeve, and the two ends of the inner ring sleeve are respectively provided with fourth sealing grooves corresponding to the internal terminal head and the other connecting seat.

[0033] In one embodiment, the second end of the inner ring sleeve, the inner connecting end and the axis of the rotating seat are located on the same axis line, and the first end of the inner ring sleeve is eccentrically arranged to match and connect with another connecting seat.

[0034] In one embodiment, at least one limiting protrusion is provided on the outer circumferential surface of the flow guide member, and a limiting groove matching the limiting protrusion is provided on the inner wall of the rotating seat.

[0035] On the basis of the eccentric limit setting of the inner ring sleeve, the limit protrusions and limit grooves set on the outer periphery of the guide piece can further play a limiting role, preventing the guide piece from rotating when the tee joint rotates. When the tee joint rotates, it can only rotate around the axis core where the second end of the inner ring sleeve is located. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0038] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure.

[0039] Figure 3 It is a schematic diagram of the overall structure of the water-dividing isolation member in the present utility model.

[0040] Figure 4 for Figure 3 A structural diagram from another perspective.

[0041] Reference numerals:

[0042] 1. Pre-filter valve head; 2. Filter bottle; 3. Pressure gauge;

[0043] 101, valve body; 1011, connecting seat; 1012, rotating seat;

[0044] 102, tee joint; 1021, water inlet; 1022, water outlet; 1023, bottom end;

[0045] 103, flow guide; 1031, outer ring; 1032, inner ring; 1033, first flow guide; 1034, second flow guide;

[0046] 104, water separation isolation member; 1041, outer isolation sleeve; 1042, inner isolation ring; 1043, inner flow channel; 1044, inner ring channel;

[0047] 105, water inlet; 106, middle channel; 107, first sealing groove; 108, second sealing groove; 109, pipe pin; 110, third sealing groove; 112, fourth sealing groove; 113, limiting protrusion; 114, limiting groove; 115, internal terminal; 116, pipe;

[0048] 201, filter assembly; 202, first filter cavity; 203, second filter cavity;

[0049] 2011, filter frame; 2012, cleaning frame; 2013, filter; 2014, driving parts;

[0050] 20121. Mounting plate; 20122. Mounting rod; 20123. Vertical reinforcement; 20124. Spiral reinforcement. DETAILED DESCRIPTION

[0051] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0052] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0053] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0055] In this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0056] Since the entire valve head is basically made of copper, when a double filter bottle is used for filtering, the path of water flowing through the valve head will become longer, and excessive contact of water with the inner wall of the valve head will affect water quality safety. By isolating the contact between water and the inner wall of the valve head as much as possible through the components in the valve head, water pollution can be reduced.

[0057] like Figure 1-4 As shown, the present invention provides a pre-filter, which includes: a pre-filter valve head 1 and a filter bottle 2, wherein the pre-filter valve head 1 includes: a valve body 101, a three-way connector 102 and two water-dividing isolation components 104.

[0058] Among them, the valve body 101 includes two connecting seats 1011 for connecting the filter bottle 2 and a rotating seat 1012 located on the two connecting seats 1011. The mouths of the two connecting seats 1011 are arranged together downward, and the rotating seat 1012 is located at the junction of the tops of the two connecting seats 1011. The bottom of the rotating seat 1012 is connected to the interior of the two connecting seats 1011. Specifically, the top opening of the rotating seat 1012 is used to connect to the three-way joint 102, and at the same time, the rotating seat 1012 is internally connected with the tops of the two connecting seats 1011 from the bottom.

[0059] The three-way joint 102 has three ends, namely a bottom end 1023, a water inlet end 1021 and a water outlet end 1022. The three ports are internally connected, and the bottom end 1023 is rotatably connected to the rotating seat 1012. A flow guide 103 is provided in the three-way joint 102, and the flow guide 103 has a first flow guide channel 1033 and a second flow guide channel 1034 that are not interconnected. The first flow guide channel 1033 connects the water inlet end 1021 of the three-way joint 102 and one of the connecting seats 1011, and the second flow guide channel 1034 connects the water outlet end 1022 of the three-way joint 102 and the other connecting seat 1011; Specifically, the guide member 103 is arranged in the bottom end 1023, and the bottom end 1023 is integrally nested and connected in the rotating seat 1012 and can rotate with the rotating seat 1012. The guide member 103 plays the role of dividing the internal space of the three-way joint 102, and guides the water flow from the water inlet end 1021 through the first guide channel 1033 to a connecting seat 1011, and then guides the water flow through the second guide channel 1034 to the water outlet end 1022; by arranging the guide member 103 in the three-way joint 102, on the one hand, it plays a role in guiding the flow, and the two internal guide channels are connected to the two connecting seats 1011 respectively, and on the other hand, it plays a role in reducing the contact between the water flow and the inner wall surface of the three-way joint 102;

[0060] In order to realize the free rotation of the three-way joint 102 and the valve body 101, the bottom end 1023 of the three-way joint 102 and the rotating seat 1012 are arranged coaxially. When rotating, the three-way joint 102 as a whole can rotate around the axis of the rotating seat 1012, so that in places where space is limited, the two connecting seats 1011 below can be rotated, making it convenient to place the two connecting seats 1011 below in a suitable position in a small space, thereby facilitating installation.

[0061] Two water-dividing isolators 104 are respectively arranged in the two connecting seats 1011, and the water-dividing isolators 104 include an outer isolating sleeve 1041 that is matched and fitted with the inner side surface of the connecting seat 1011. The outer isolating sleeve 1041 is nested in the connecting seat 1011, and the outer wall of the outer isolating sleeve 1041 is tightly fitted with the inner wall of the connecting seat 1011. When the water flows from the rotating seat 1012 into the connecting seat 1011, it directly enters the water-dividing isolator 104, reducing the contact between the water flow and the inner wall of the valve body 101. An inner isolating ring 1042 is provided in the outer isolating sleeve 1041, and the inner isolating ring 1042 separates the inner flow channel 1043 and the inner ring channel 1044 in the outer isolating sleeve 1041. The inner flow channel 1043 is formed on the inner isolating ring 1042. 42, an inner annular channel 1044 is formed between the inner isolation ring 1042 and the outer isolation sleeve 1041, and a water inlet 105 connected to the inner annular channel 1044 or the inner flow channel 1043 is provided on the water-dividing isolation member 104 corresponding to the connecting seat 1011. The water inlet 105 facilitates the water flow in the rotating seat 1012 to enter the water-dividing isolation member 104 in the connecting seat 1011, and also facilitates the water flow inside the water-dividing isolation member 104 to enter the rotating seat 1012. An intermediate channel 106 connecting the interiors of the two water-dividing isolation members 104 is provided between the two connecting seats 1011. The intermediate channel 106 facilitates the water flow after being filtered by the filter bottle 2 entering through one connecting seat 1011 to enter the other connecting seat 1011 and then enter the corresponding filter bottle 2.

[0062] The filter bottle 2 is connected to the connecting seat 1011. A filter assembly 201 is provided in the filter bottle 2. The filter assembly 201 divides the space in the filter bottle 2 into a first filter cavity 202 and a second filter cavity 203 corresponding to the inner flow channel 1043 and the inner annular channel 1044 respectively.

[0063] The water flow is guided from the inlet end through the first guide channel 1033 to the connecting seat 1011 by the guide member 103. The water-dividing isolation member 104 in the connecting seat 1011 serves to separate the water flow, so that the inner ring channel 1044 and the inner flow correspond to the first filter cavity 202 and the second filter cavity 203 respectively. After being filtered by the two filter bottles 2, the water flows out of the second guide channel 1034, and the water flow path is smooth. On the other hand, the water-dividing isolation member 104 and the guide member 103 serve to prevent the water flow from excessive contact with the inner wall of the connecting seat 1011 and the inner wall of the three-way joint 102, thereby avoiding problems such as impure water quality and poor taste, and improving water quality safety.

[0064] In this embodiment, the water flow direction is to enter from the water inlet end 1021, pass through the left connecting seat 1011 and the left filter bottle 2 through the first guide channel 1033, then enter the right connecting seat 1011 and the right filter bottle 2 through the middle channel 106, and then enter and exit the water outlet end 1022 through the second guide channel 1034. The water inlets 105 of the two water-dividing isolation members 104 are specifically arranged as follows: the water inlet 105 of the water-dividing isolation member 104 in the left connecting seat 1011 is connected to the inner annular channel 1044. After the water flows through the first guide channel 1033 and enters the inner annular channel 1044, it enters the first filter cavity 202 and the second filter cavity 203 connected to the left connecting seat 1011 and the filter bottle 2, and then enters the inner flow channel 1043 of the water-dividing isolation member 104. The inner flow of the left isolation member The channel 1043 is connected with the middle channel 106, that is, a section of pipe 116 connected with the middle channel 106 is correspondingly arranged between the inner isolation ring 1042 of the left isolation member and the outer isolation sleeve 1041. The pipe 116 is isolated from the inner annular channel 1044 on the outside, and the water flow in the inner flow channel 1043 is sent into the middle channel 106. The water flow is sent into the inner annular channel 1044 in the right water diversion isolation member 104 through the middle channel 106. After being filtered by the first filter cavity 202 and the second filter cavity 203 of the right filter bottle 2, it enters the inner flow channel 1043 of the right water diversion isolation member 104. The water outlet 105 of the right water diversion isolation member 104 is connected with the inner flow channel 1043, and the water flow is sent into the second guide channel 1034 of the guide member 103, and then enters the water outlet end 1022.

[0065] The filter assembly 201 includes a filter frame 2011 , a cleaning frame 2012 and a driving member 2014 .

[0066] The filter frame 2011 is cylindrical and is arranged in the filter bottle 2. The top of the filter frame 2011 is matched and embedded in the inner isolation ring 1042. The cleaning frame 2012 is sleeved on the outside of the filter frame 2011. A gap for placing the filter is formed between the cleaning frame 2012 and the filter frame 2011. The filter 2013 is coated on the outside of the filter frame 2011 and cooperates with the filter frame 2011 to isolate and form the first filter cavity 202 and The function of the second filter chamber 203 is that the driving member 2014 is arranged at the bottom of the cleaning skeleton 2012, and an inclined guide channel is provided in the driving member 2014 to drive the cleaning skeleton 2012 to rotate under the drive of the water flow, wherein the driving member 2014 is disc-shaped, and the inclined guide channel opened therein can rotate under the impact of the water flow. The water flows through the inclined guide channel, driving the driving member 2014 to rotate, and then driving the cleaning skeleton 2012 to rotate, so as to clean the filter on the filter skeleton 2011.

[0067] Specifically, the cleaning skeleton 2012 includes: an integrally formed mounting plate 20121 , a plurality of vertical ribs 20123 and spiral ribs 20124 .

[0068] The mounting plate 20121 is provided with a mounting rod 20122 extending into the driving member 2014. The rotation of the driving member 2014 drives the mounting rod 20122 to rotate, and then drives the vertical ribs 20123 and the spiral ribs 20124 to rotate. The vertical ribs 20123 are arranged at the top of the periphery of the mounting plate 20121, and the outer side of the vertical ribs 20123 is provided with a cleaning strip for contacting the inner wall of the filter bottle 2; the spiral ribs 20124 are around the periphery of the mounting plate 20121 and connect several of the vertical ribs 20123 in sequence. The rotation direction of the spiral ribs 20124 is consistent with the rotation direction of the inclined guide channel. The spiral ribs 20124 can further play a role in driving the cleaning frame 2012 to rotate. By arranging a cleaning strip that contacts and fits the inside of the filter bottle 2 on the outer side of the vertical ribs 20123, when the cleaning frame 2012 rotates, the cleaning strip can rotate to clean the inner wall of the filter bottle 2.

[0069] In this embodiment, the flow guide 103 includes an outer ring sleeve 1031 and an inner ring sleeve 1032 .

[0070] The outer ring sleeve 1031 is fitted onto the inner wall surface of the bottom end 1023 of the tee joint 102 to isolate the inner wall surface of the bottom end 1023 of the tee joint 102. The specific height of the outer ring sleeve 1031 can be determined according to actual rotation. The outer ring sleeve 1031 can fully cover the inner wall surface of the bottom end 1023 of the tee joint 102, or partially cover the inner wall surface of the bottom end 1023 of the tee joint 102.

[0071] The inner ring sleeve 1032 is arranged in the outer ring sleeve 1031 to separate the space in the outer ring sleeve 1031 into the first guide channel 1033 and the second guide channel 1034. The inside of the inner ring sleeve 1032 is the second guide channel 1034, and the space between the inner ring sleeve 1032 and the outer ring sleeve 1031 is the first guide channel 1033.

[0072] The outer ring sleeve 1031 is fitted to the inner wall surface of the bottom end 1023 of the tee joint 102, which prevents excessive water flow from contacting the inner wall surface of the tee joint 102. Then the inner ring sleeve 1032 and the outer ring sleeve 1031 form a first guide channel 1033 and a second guide channel 1034 that do not contact each other to achieve guidance control of the water flow.

[0073] Specifically, the first end of the inner ring sleeve 1032 is matched and embedded in the other connecting seat 1011, that is, the connecting seat 1011 on the right side of the figure, and the three-way joint 102 is provided with an inner terminal 115 that is connected to the water outlet end 1022 of the three-way joint 102 and is matched and nested with the second end of the inner ring sleeve 1032. The inner terminal 115 is fixed inside the three-way joint 102, located between the inlet end and the outlet end, opposite to the bottom end 1023. Since the second end of the inner ring sleeve 1032 is matched and nested in the inner terminal 115, the water flow entering from the inlet end is blocked and enters the left connecting seat 1011 from the first guide channel 1033. The two ends of the inner ring sleeve 1032 are respectively provided with the inner terminal 115 that is connected to the inner terminal 11 5 and the fourth sealing groove 112 corresponding to the other connecting seat 1011, the sealing connection effect with the inner connecting end 115 and the right connecting seat 1011 is strengthened by the fourth sealing groove 112, the first guide channel 1033 and the second guide channel 1034 are separated, water flow cannot flow into the inner ring sleeve 1032, the water flow entering from the water inlet end 1021 cannot enter the water outlet end 1022 and the right connecting seat 1011, and can only enter the left connecting seat 1011 from the first guide channel 1033 between the inner ring sleeve 1032 and the outer ring sleeve 1031. At the same time, the outer ring sleeve 1031 and the inner wall of the bottom end 1023 are tightly matched, reducing the water flow entering the gap between the outer ring sleeve 1031 and the inner wall of the bottom end 1023.

[0074] In order to realize the rotation between the rotating seat 1012 and the three-way joint 102, the second end of the inner ring sleeve 1032, the internal connecting end 115 and the axis of the rotating seat 1012 are located on the same axis. By arranging the second end of the inner ring sleeve 1032, the internal connecting end 115 and the rotating seat 1012 on the same axis, the upper three-way joint 102 can rotate around the axis. The first end of the inner ring sleeve 1032 is eccentrically arranged to match and connect with the other connecting seat 1011. Since the first and second ends of the inner ring sleeve 1032 are eccentrically arranged, the guide member 103 is limitedly connected therein and does not rotate, so that there is a better sealing effect between the guide member 103 and the three-way joint 102.

[0075] Furthermore, at least one limiting protrusion 113 is provided on the outer circumferential surface of the flow guide 103 , and a limiting groove 114 matching the limiting protrusion 113 is opened on the inner wall of the rotating seat 1012 .

[0076] On the basis of the eccentric limit setting of the inner ring sleeve 1032, the limit protrusion 113 and the limit groove 114 set on the outer periphery of the guide member 103 can further play a limiting role, preventing the guide member 103 from rotating when the three-way joint 102 rotates. When the three-way joint 102 rotates, it can only rotate around the axis core where the second end of the inner ring sleeve 1032 is located.

[0077] In order to ensure that water does not enter the space between the water-dividing isolator 104 and the connecting seat 1011 when the water flows inside the water-dividing isolator 104 through the middle channel 106, and to improve the sealing effect of the water-dividing isolator 104, on the one hand, the outer periphery of the water-dividing isolator 104 is installed close to the inner wall of the connecting seat 1011, and the water-dividing isolator 104 is tightly attached, so that water basically cannot enter between the water-dividing isolator 104 and the connecting seat 1011. Even if some water flows in, it is not flowing water, and a water seal will be formed to achieve a sealing effect.

[0078] On the other hand, to further improve the sealing effect, a first sealing groove 107 for accommodating a sealing ring is provided on the outer surface of the water-dividing isolator 104 corresponding to the outer contour of the intermediate channel 106. By filling the sealing ring into the first sealing groove 107 provided on the water-dividing isolator 104, water flowing into the intermediate channel 106 through the water-dividing isolator 104 will not flow into the gap between the water-dividing isolator 104 and the connecting seat 1011. Instead, the water flow is directly guided to the next water-dividing isolator 104 through the intermediate channel 106. Similarly, the water-dividing isolator 104 at the other end may also be provided with a first sealing groove 107 to prevent water from entering the gap between the water-dividing isolator 104 and the connecting seat 1011.

[0079] In order to prevent water entering from the bottom end 1023 of the tee joint 102 through the water inlet 105 from flowing into the gap between the water diversion isolator 104 and the connecting seat 1011, the outer periphery of the water diversion isolator 104 is provided with at least two second sealing grooves 108 for placing sealing rings. The two second sealing grooves 108 are located on both sides of the middle channel 106. Specifically, the two sealing grooves are respectively located on the top periphery and the bottom periphery of the inner and outer isolation sleeves 1041 of the water diversion isolator 104. At the same time, it can also prevent water from entering from the bottom of the connecting seat 1011 and the water diversion isolator 104, which can achieve a better isolation and sealing effect above and below, and at the same time reduce the contact between the water flow and the inner wall of the connecting seat 1011.

[0080] Since the intermediate channel 106 is arranged between the joints of the two connecting seats 1011, the intermediate channel 106 runs through the joints of the two connecting seats 1011, so the material of the inner wall of the intermediate channel 106 is still consistent with the connecting seat 1011. In order to further prevent excessive water flow from contacting the inner wall of the intermediate channel 106, a pipe pin 109 is matched and inserted into the intermediate channel 106, and a third sealing line 110 for placing a sealing ring is provided on the outer peripheral surface of both ends of the pipe pin 109. The two third sealing lines 110 are respectively matched and embedded in the two water-dividing isolation members 104; the third sealing line 110 can prevent water from flowing into between the pipe pin 109 and the intermediate channel 106.

[0081] By inserting the pipe pin 109 , the exposed inner wall of the intermediate channel 106 through which water flows from one water-dividing isolator 104 to another water-dividing isolator 104 is compensated. The water can flow through the inside of the pipe pin 109 , avoiding contact between the water flow and the inner wall of the intermediate channel 106 .

[0082] At the same time, a protrusion is provided on the edge of one end of the pipe pin 109 to facilitate the insertion of the pipe pin 109 to the bottom and play a positioning role.

[0083] In this embodiment, a pressure gauge 3 interface is also provided on the valve body 101, and the pressure gauge 3 interface is connected to the intermediate channel 106. By connecting the pressure gauge 3 interface to the intermediate channel 106 between the two filter bottles 2, the pressure in the entire pre-filter can be accurately measured.

[0084] 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 it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pre-filter, characterized in that: include: A pre-filter valve head, the pre-filter valve head comprising: The valve body includes two connecting seats for connecting the filter bottle and a rotating seat located on the two connecting seats, and the bottom of the rotating seat is connected to the interior of the two connecting seats; A three-way joint, the bottom end of which is rotatably connected to the rotating seat, the three-way joint is provided with a flow guide, the flow guide having a first flow guide channel and a second flow guide channel that are not interconnected, the first flow guide channel connecting the water inlet end of the three-way joint and one of the connecting seats, and the second flow guide channel connecting the water outlet end of the three-way joint and the other connecting seat; Two water-dividing isolators are respectively disposed in the two connecting seats, the water-dividing isolators comprising an outer isolating sleeve that matches and fits the inner side surface of the connecting seat, the outer isolating sleeve being provided with an inner isolating ring that separates the inner flow channel from the inner annular channel in the outer isolating sleeve, the water-dividing isolators corresponding to the connecting seats are provided with a water inlet that communicates with the inner annular channel or the inner flow channel, and an intermediate channel that communicates with the interiors of the two water-dividing isolators is provided between the two connecting seats; A filter bottle is connected to the connecting seat. A filter assembly is provided in the filter bottle. The filter assembly divides the space in the filter bottle into a first filter cavity and a second filter cavity corresponding to the inner flow channel and the inner annular channel respectively.

2. The prefilter according to claim 1, characterized in that The filter assembly comprises: A filter frame is provided in the filter bottle, and its top is matched and embedded in the inner isolation ring; A cleaning frame is sleeved on the outside of the filter frame, with a gap for placing the filter formed between the cleaning frame and the filter frame; The driving member is arranged at the bottom of the cleaning frame. The driving member is provided with an inclined flow guide channel so as to be driven by water flow to drive the cleaning frame to rotate.

3. The prefilter according to claim 2, characterized in that: The cleaning skeleton comprises: a mounting plate, wherein the mounting plate is provided with a mounting rod extending into the driving member; A plurality of vertical ribs are arranged on the top of the periphery of the mounting plate, and a cleaning rubber strip is provided on the outer side of the vertical ribs for contacting the inner wall of the filter bottle; The spiral ribs are arranged around the periphery of the mounting plate and are connected to a plurality of the vertical ribs in sequence.

4. The pre-filter according to claim 1, characterized in that The flow guide comprises: An outer ring sleeve, the outer ring sleeve is fitted on the inner wall surface of the bottom end of the tee joint and is used to isolate the inner wall surface of the bottom end of the tee joint; The inner ring sleeve is arranged in the outer ring sleeve and is used to separate the space in the outer ring sleeve into the first flow guide channel and the second flow guide channel.

5. The pre-filter according to claim 1, characterized in that: A first sealing groove for accommodating a sealing ring is provided on the outer surface of the water-dividing isolator corresponding to the outer contour of the middle channel. At least two second sealing grooves for accommodating a sealing ring are provided on the outer periphery of the water-dividing isolator. The two second sealing grooves are located on both sides of the middle channel.

6. The pre-filter according to claim 1, characterized in that: A pipe pin is matched and inserted into the middle channel. Third sealing grooves for placing sealing rings are opened on the outer peripheral surfaces of both ends of the pipe pin. The two third sealing grooves are matched and embedded in the two water-dividing isolation pieces respectively.

7. The pre-filter according to claim 1, characterized in that: The valve body is also provided with a pressure gauge interface, which is connected to the middle channel.

8. The pre-filter according to claim 4, characterized in that: The first end of the inner ring sleeve is matched and embedded in the other connecting seat. The three-way joint is provided with an internal terminal head connected to the water outlet end of the three-way joint for matching and nesting with the second end of the inner ring sleeve. The two ends of the inner ring sleeve are respectively provided with fourth sealing grooves corresponding to the internal terminal head and the other connecting seat.

9. The pre-filter according to claim 8, characterized in that: The second end of the inner ring sleeve, the inner connecting end and the axis of the rotating seat are located on the same axis line, and the first end of the inner ring sleeve is eccentrically arranged to match and connect with the other connecting seat.

10. The pre-filter according to claim 1, characterized in that: At least one limiting protrusion is provided on the outer peripheral surface of the flow guide, and a limiting groove matching the limiting protrusion is provided on the inner wall of the rotating seat.

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