Filtering device for water supply pipeline

Abstract

The invention belongs to the technical field of water pipe fittings, particularly relates to a water supply pipeline filtering device, and provides the following scheme aiming at the problems that a filtering device in the prior art sacrifices water pressure and flow velocity and a filtering medium needs to be frequently replaced. Comprising a middle pipe, two symmetrical inclined pipes and two symmetrical end connecting pipes, the middle pipe, the inclined pipes and the end connecting pipes are the same in diameter and wall thickness, the whole arch-shaped pipeline hunches upwards, a vertical strip-shaped connecting pipe penetrates through the portion, close to the lower portion, of the circumferential outer wall of the middle pipe, and the vertical strip-shaped connecting pipe penetrates through the middle pipe. The cross section of the strip-shaped connecting pipe is of a strip-shaped hole structure, and the length direction of a strip-shaped hole is parallel to the axis of the middle pipe. When the filter is used, to-be-filtered water passes through the filter screen from bottom to top, some impurities are prevented from blocking the filter screen under the action of gravity, and the anti-backflushing mechanism can intercept blocked particles at the bottom of the filter main box.

Description

Technical Field

[0001] The present invention relates to the technical field of water pipe fittings, and particularly relates to a water supply pipeline filtering device. Background Art

[0002] Filtering of water supply pipelines is an important link to ensure clean water quality and the normal operation of pipelines and equipment. The water source usually contains impurities such as sand grains, soil, rust, algae, bacteria, etc. These impurities will affect the water quality and cause pipeline blockage or damage. Especially for pipelines used in sprinkler irrigation, once there are larger particles of impurities, it is extremely easy to block the spray holes of the nozzles; through an effective filtering system, these harmful substances can be removed, keeping the water quality clean and extending the service life of equipment and pipelines.

[0003] After retrieval, most of the existing water supply pipeline filtering devices in the prior art are to install a filter by cutting off the middle of the water pipe, and multiple layers of filtering media need to be set in the filter. The filtering effect of this kind of filter is achieved by sacrificing water pressure and flow rate and frequently replacing the filtering media. Therefore, we propose a new type of water supply pipeline filtering device that can avoid replacing the filtering media and does not affect the flow rate. Summary of the Invention

[0004] Aiming at the technical problems that the existing filtering devices sacrifice water pressure and flow rate and need to frequently replace the filtering media, the present invention adopts the following technical solutions: A water supply pipeline filtering device includes an arched pipeline. The arched pipeline includes a middle pipe section, two symmetrically arranged inclined pipes, and two symmetrically arranged end connection pipes. The diameters and wall thicknesses of the middle pipe, the inclined pipes, and the end connection pipes are the same, and the overall arched pipeline arches upward. A vertical strip-shaped connection pipe is penetrated near the lower part of the circumferential outer wall of the middle pipe, and the cross-section of the strip-shaped connection pipe is in the shape of a strip-shaped hole. The length direction of the strip-shaped hole is parallel to the axis line of the middle pipe. The bottom end of the strip-shaped connection pipe is communicated with a main filtering box. The main filtering box is a cuboid box-shaped structure with a cavity inside and an opening facing the water outlet side. A same inclined partition is hermetically clamped in the middle of the middle pipe and the strip-shaped connection pipe. A same L-shaped partition is fixed between the front and rear inner walls of the main filtering box near the top. The top end of the L-shaped partition is hermetically docked with the bottom end of the inclined partition, and the bottom end of the L-shaped partition is fixed with an inclined baffle extending obliquely towards the opening of the main filtering box. Two symmetrically arranged fan-shaped water passing holes are opened near the middle of the surface of the inclined baffle. A filter net is arranged on the lower surface of the inclined baffle at the positions of the two fan-shaped water passing holes, and a cleaning mechanism is arranged on the upper surface of the inclined baffle; a counterflush prevention mechanism for preventing large particle debris from mixing with the water flow and impacting the filter net is arranged obliquely below the filter net inside the main filtering box, and a sealing side cover is fixed at the opening of the main filtering box.

[0005] Preferably, the cleaning mechanism includes a converging pipe embedded inside an inclined pipe near one end close to the water inlet. A sealing bearing is embedded near the middle of the upper end of the inclined partition board, and a transmission rod is rotatably connected in the sealing bearing. A propeller blade is fixed to one end of the transmission rod close to the converging pipe, and a small runner is fixed to the other end of the transmission rod away from the converging pipe. A connecting rod extending to the upper surface of the inclined baffle is rotatably connected to the surface of the small runner near the circumferential edge; on the upper surface of the inclined baffle, a trough-shaped slide rail is fixed between two fan-shaped water passing holes, and symmetrically arranged L-shaped shaft rods are respectively arranged on both sides of the trough-shaped slide rail. The top ends of the two L-shaped shaft rods are respectively rotatably connected to symmetrically arranged folded cleaning rods, and the closer ends of the two folded cleaning rods are hinged to the same double-headed hinge block; an arc-shaped notch is opened at the top end of the double-headed hinge block, and the other end of the main shaft one is inserted into the other end of the connecting rod; two symmetrically arranged hinge holes are opened near the bottom end of the side surface of the double-headed hinge block, and the size of the hinge holes is adapted to the size of the L-shaped shaft rods.

[0006] Preferably, the inner diameter of the converging pipe is smaller than the inner diameter of the end connection pipe, and reducing pipe joints are hermetically fixed at the end connection pipes at both ends of the bow-shaped pipe; by setting like this, the flow rate of water passing through the propeller blade can be increased, and then the rotation speed of the transmission rod can be increased.

[0007] Preferably, a convex platform slider is slidably connected in the chute of the trough-shaped slide rail, and the double-headed hinge block is fixed to the convex platform slider by screws. Ball bearings are embedded near the four corners of the upper and lower surfaces of the convex platform slider; hard bristles are implanted on the side of the folded cleaning rod close to the filter screen. By setting like this, the swinging trajectories of the two folded cleaning rods always act on the fan-shaped water passing holes, improving the cleaning effect.

[0008] Preferably, a pressing frame is fixed at the edge of the filter screen, and the pressing frame is fixed to the lower surface of the inclined baffle by screws; by providing the pressing frame, not only the tension degree of the filter screen can be adjusted, but also the installation and maintenance of the device are made more convenient.

[0009] Preferably, a sewage discharge pipe is reserved in the middle of the bottom end of the main filter box, and a bottom cover is screwed on the circumferential outer wall of the bottom end of the sewage discharge pipe; by providing the sewage discharge pipe and the bottom cover, some solid particles can be temporarily stored in the bottom cover, and only the bottom cover needs to be disassembled and cleaned when discharging sewage regularly.

[0010] Preferably, a strip-shaped jack for inserting a strip-shaped connection pipe is opened at the top end of the main filter box, and the bottom end of the strip-shaped connection pipe is flush with the top inner wall of the main filter box, and the bottom end of the inclined partition board is flush with the top inner wall of the main filter box; a sealing rubber strip is clamped at the middle of the top end of the L-shaped partition board; the blocking effect of the L-shaped partition board and the inclined partition board can be improved.

[0011] Preferably, the anti-backlash mechanism includes arc-shaped baffles fixed on the inner walls of the front and rear sides of the main filter box at equal distances, all the arc-shaped baffles have a "W" shape in longitudinal section, and the bottom ends of two adjacent arc-shaped baffles are fixed with blocking strips with crossed bristles.

[0012] Preferably, a single blocking wool strip is tangent to the arc surface at the edge of the arc baffle, and the front view of two adjacent blocking wool strips is a V-shaped structure; a one-way non-return effect can be formed; and an observation window is provided on the front of the main filter box.

[0013] Preferably, a spring stopper is fixed in the middle of the vertical inner wall of the main filter box on one side away from the opening, and an arc-shaped water-catching plate is hinged on the top inner wall of the main filter box near the spring stopper, a reset spring is fixed between the back side of the arc-shaped water-catching plate and the spring stopper, and the arc-shaped water-catching plate does not affect the water outlet of the strip pipe under normal circumstances; a fixed pulley frame is fixed on the lower surface of the L-shaped partition, and a fixed pulley is arranged in the fixed pulley frame, a pull rope is fixed to the middle part of the bottom end of the L-shaped partition, the pull rope passes around the top of the fixed pulley downward and then passes through the arc-shaped baffle to which a counterweight ball is fixed; through the arc-shaped water-catching plate and the setting of the pull rope, the pull rope can be pulled downward when discharging sewage, and at this time the arc-shaped water-catching plate will intercept the downward rushing water flow to the surface facing the filter net, and at this time the surface of the filter net generates a strong oblique impact force, thereby effectively flushing the stains.

[0014] The beneficial effects of the present invention are: 1. By setting the inclined baffle in conjunction with the filter screen that is tightly attached to its lower surface, the water to be filtered can pass through the filter screen from bottom to top during use, preventing some impurities from being blocked on the filter screen under the action of gravity. The anti-recoil mechanism can intercept the blocked particles at the bottom of the main filter box, and can also prevent the disturbance of the water flow from causing continuous impact of debris on the filter screen.

[0015] 2. Through the cleaning mechanism, when liquid passes through the bow-shaped pipe during use, the transmission rod can be driven to rotate, and then the two folded cleaning rods are driven by the small wheel and the connecting rod to brush the surface of the two fan-shaped water holes in the state of flapping wings, thereby cleaning the filter screen.

[0016] 3. By setting up the arc baffle and blocking strips, the blocked large particles of impurities can break through the blocking strips under the action of gravity or water flow, and then fall under the arc baffle. They will then be blocked by the crossed blocking strips and cannot move upward, thereby reducing the continuous impact on the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a water supply pipeline filtering device proposed by the present invention; Figure 2Side view of a water supply pipeline filtering device proposed by the present invention; Figure 3 A water supply pipeline filtering device proposed by the present invention Figure 2 Schematic cross-sectional structure diagram along line A-A in it; Figure 4 A water supply pipeline filtering device proposed by the present invention Figure 3 Enlarged structure schematic diagram at position B in it; Figure 5 Exploded view of a cleaning mechanism of a water supply pipeline filtering device proposed by the present invention; Figure 6 Assembly drawing of a double-headed hinge block and a folded cleaning rod in a water supply pipeline filtering device proposed by the present invention; Figure 7 Semi-sectional three-dimensional structure schematic diagram of a water supply pipeline filtering device proposed by the present invention during sewage flushing; Figure 8 Three-dimensional view of a double-headed hinge block in a water supply pipeline filtering device proposed by the present invention.

[0018] In the figure: 1, main filtering box; 101, first observation window; 102, sewage discharge pipe; 103, strip-shaped jack; 2, reducing pipe joint; 3, bow-shaped pipeline; 4, strip-shaped connecting pipe; 5, sealed side cover; 6, bottom cover; 7, blocking wool strip; 8, arc-shaped baffle; 9, confluent pipe; 10, propeller blade; 11, inclined partition board; 12, L-shaped partition board; 13, connecting rod; 14, folded cleaning rod; 15, filter net; 151, pressing frame; 16, groove-shaped slide rail; 17, inclined baffle; 171, fan-shaped water passing hole; 18, counterweight ball; 19, pull rope; 20, reset tension spring; 21, spring stop block; 22, arc-shaped water collecting board; 23, transmission rod; 24, double-headed hinge block; 241, arc-shaped notch; 242, hinge hole; 25, convex platform slider; 26, L-shaped shaft rod. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0020] In this embodiment, refer to Figures 1-8A water supply pipeline filtering device includes an arched pipe 3, which includes a middle pipe, two mutually symmetrical oblique pipes and two mutually symmetrical end pipes. The diameters and wall thicknesses of the middle pipe, the oblique pipe and the end pipe are the same, and the arched pipe 3 is arched upward as a whole. A vertical strip pipe 4 is passed through the circumferential outer wall of the middle pipe near the bottom, and the cross section of the strip pipe 4 is a strip hole structure. The length direction of the strip hole is parallel to the axis of the middle pipe. The bottom end of the strip pipe 4 The filter main box 1 is connected to the filter main box 1. The filter main box 1 is a rectangular box-shaped structure with a cavity opening facing the water outlet side, and the middle of the middle tube and the strip-shaped pipe 4 is sealed and clamped with the same inclined partition 11. The same L-shaped partition 12 is fixed near the top between the inner walls of the front and rear sides of the filter main box 1. The top of the L-shaped partition 12 is sealed and connected to the bottom of the inclined partition 11. The bottom of the L-shaped partition 12 is fixed with an inclined baffle 17 extending obliquely toward the opening of the filter main box 1, and the surface of the inclined baffle 17 is fixed. Two mutually symmetrical fan-shaped water holes 171 are opened near the middle of the surface, and the lower surface of the inclined baffle 17 is provided with a filter screen 15 close to the fan-shaped water holes 171, and a cleaning mechanism is provided on the upper surface of the inclined baffle 17; the interior of the main filter box 1 is provided with an anti-rebound mechanism located at the oblique lower part of the filter screen 15 to prevent large particles of debris from mixing with the water flow from impacting the filter screen 15, and a sealing side cover 5 is fixed at the opening of the main filter box 1; the inclined baffle 17 is provided with the filter screen 15 close to its lower surface, so that when in use, the water to be filtered can pass through the filter screen 15 from bottom to top, and some impurities are prevented from being blocked on the filter screen 15 under the action of gravity, and the anti-rebound mechanism can intercept the blocked particles at the bottom of the main filter box 1, and can also prevent the disturbance of the water flow from causing the debris to continue to impact the filter screen 15, and the cleaning mechanism can also intermittently clean the filter screen 15 from the other side, so as to push out some blocked small particles.

[0021] Reference Figures 3-5, the cleaning mechanism includes a converging pipe 9 embedded inside the inclined pipe near one end close to the water inlet. A sealing bearing is embedded near the middle and top of the inclined baffle 11, and a transmission rod 23 is rotatably connected in the sealing bearing. A propeller blade 10 is fixed at one end of the transmission rod 23 close to the converging pipe 9, and a small runner is fixed at the other end of the transmission rod 23 away from the converging pipe 9. A connecting rod 13 extending to the upper surface of the inclined baffle 17 is rotatably connected near the circumferential edge of the surface of the small runner; on the upper surface of the inclined baffle 17, a groove-shaped slide rail 16 is fixed between two sector-shaped water passing holes 171. Symmetric L-shaped shaft rods 26 are respectively arranged on both sides of the groove-shaped slide rail 16. Symmetric folding cleaning rods 14 are respectively rotatably connected at the tops of the two L-shaped shaft rods 26. The closer ends of the two folding cleaning rods 14 are hinged to the same double-headed hinge block 24; an arc-shaped notch 241 is opened at the top end of the double-headed hinge block 24, and the other end of the main shaft one is inserted into the other end of the connecting rod 13 through the bottom of the arc-shaped notch 241; two symmetric hinge holes 242 are opened near the bottom end on the side surface of the double-headed hinge block 24, and the size of the hinge holes 242 is adapted to the size of the L-shaped shaft rods 26; by setting the cleaning mechanism, when there is liquid passing through the bow-shaped pipe 3 during use, the transmission rod 23 can be driven to rotate, and then under the action of the small runner and the connecting rod 13, the two folding cleaning rods 14 are driven to brush on the surfaces of the two sector-shaped water passing holes 171 in a state of wing flapping, thereby cleaning the filter net 15.

[0022] Refer to Figure 3 , the inner diameter of the converging pipe 9 is smaller than the inner diameter of the end connection pipe, and variable-diameter pipe joints 2 are hermetically fixed at the end connection pipes at both ends of the bow-shaped pipe 3; by setting like this, the flow rate of the water flow passing through the propeller blade 10 can be increased, and then the rotation speed of the transmission rod 23 can be increased.

[0023] Refer to Figure 5 、 Figure 6 、 Figure 8 , a convex platform slider 25 is slidably connected in the chute of the groove-shaped slide rail 16, and the double-headed hinge block 24 is fixed on the convex platform slider 25 by screws. Ball bearings are embedded near the four corners on the upper and lower surfaces of the convex platform slider 25; hard bristles are implanted on the side of the folding cleaning rod 14 close to the filter net 15. By setting like this, the swinging trajectories of the two folding cleaning rods 14 can always act in the sector-shaped water passing holes 171, improving the cleaning effect.

[0024] Refer to Figure 4 and Figure 6 , a pressing frame 151 is fixed at the edge of the filter net 15, and the pressing frame 151 is fixed on the lower surface of the inclined baffle 17 by screws; by setting the pressing frame 151, not only the tension degree of the filter net 15 can be adjusted, but also the installation and maintenance of the device are made more convenient.

[0025] Refer toFigures 2-3 At the middle of the bottom end of the main filtering box 1, a sewage discharge pipe 102 is reserved, and a bottom cover 6 is screwed on the outer circumferential wall of the bottom end of the sewage discharge pipe 102. By providing the sewage discharge pipe 102 and the bottom cover 6, some solid particles can be temporarily stored in the bottom cover 6, and when discharging sewage regularly, only the bottom cover 6 needs to be disassembled and cleaned.

[0026] Refer to Figure 3 At the top end of the main filtering box 1, a strip-shaped jack 103 for inserting a strip-shaped connecting pipe 4 is opened, and the bottom end of the strip-shaped connecting pipe 4 is flush with the top inner wall of the main filtering box 1, and the bottom end of the inclined partition plate 11 is flush with the top inner wall of the main filtering box 1; at the middle of the top end of the L-shaped partition plate 12, a sealing rubber strip is clamped. It can improve the blocking effect of the L-shaped partition plate 12 and the inclined partition plate 11.

[0027] Refer to Figure 1 and Figure 3 The anti-backflow mechanism includes arc-shaped baffles 8 fixed at equal distances on the inner walls of the front and rear sides of the main filtering box 1. All the arc-shaped baffles 8 are distributed in a "W" shape in the longitudinal section, and at the bottom ends of two adjacent arc-shaped baffles 8, blocking strips 7 with crossed bristles are fixed; by providing the arc-shaped baffles 8 and the blocking strips 7, the large particle impurities blocked can be made to push open the blocking strips 7 under the action of gravity or water flow, and then fall below the arc-shaped baffles 8, and then will be blocked by the crossed blocking strips 7 and cannot move upward, thereby reducing the continuous influence on the filter net 15.

[0028] Refer to Figure 1 and Figure 3 The single bristle of the blocking strip 7 is tangent to the arc surface at the edge of the arc-shaped baffle 8, and the front view of two adjacent blocking strips 7 forms a V-shaped structure; it can form a one-way anti-backflow function; an observation window 101 is provided on the front of the main filtering box 1.

[0029] Refer to Figure 3 and Figure 7 At the middle of the side of the vertical inner wall of the main filtering box 1 far away from the opening, a spring stopper 21 is fixed, and at the top inner wall of the main filtering box 1 near the spring stopper 21, an arc-shaped water collecting plate 22 is hinged. A return spring 20 is fixed between the back surface of the arc-shaped water collecting plate 22 and the spring stopper 21, and the arc-shaped water collecting plate 22 does not affect the water outlet of the strip-shaped connecting pipe 4 usually; a fixed pulley frame is fixed on the lower surface of the L-shaped partition plate 12, and a fixed pulley is arranged in the fixed pulley frame. At the middle of the bottom end of the L-shaped partition plate 12, a pull rope 19 is fixed. The pull rope 19 bypasses the top of the fixed pulley and then passes downward and passes through the arc-shaped baffle 8 to fix a counterweight ball 18; by providing the arc-shaped water collecting plate 22 and in cooperation with the setting of the pull rope 19, when discharging sewage, the pull rope 19 can be pulled downward. At this time, the arc-shaped water collecting plate 22 will intercept the downward flowing water to the surface facing the filter net 15. At this time, a strong oblique impact force is generated on the surface of the filter net 15, and then the stains can be effectively washed.

[0030] Working principle: When the device is in use, check to ensure that the bottom cover 6 and the sealing side cover 5 are sealed; then connect the reducer joints 2 at both ends of the device to the water pipe. At this time, the water flows in from the end close to the flow-collecting pipe 9, encounters the obstruction of the inclined partition 11, flows down smoothly, enters the main filter box 1 through the strip pipe 4, and then passes through the filter screen 15 and the fan-shaped water hole 171, and then goes up through the strip pipe 4 on the other side of the inclined partition 11, and finally flows out from the reducer joint 2 at the other end; when liquid passes through the bow pipe 3, the transmission rod 23 is driven to rotate under the action of the propeller blades 10, and then the small runner and the connecting rod 13 are driven to rotate. Under the action, the two folded cleaning rods 14 are driven to brush the surfaces of the two fan-shaped water holes 171 in a flapping state, thereby cleaning the filter screen 15; through the provided arc baffle 8 and blocking wool strips 7, the blocked large particles of impurities are allowed to break through the blocking wool strips 7 under the action of gravity or water flow, and then fall under the arc baffle 8, and then they are blocked by the crossed blocking wool strips 7 and cannot move upward, thereby reducing the continuous impact on the filter screen 15; through the provided sewage pipe 102 and bottom cover 6, some solid particles are temporarily stored in the bottom cover 6, and when discharging sewage regularly, the bottom cover 6 only needs to be disassembled and cleaned.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A water supply pipeline filtering device, comprising an arcuate pipeline (3), wherein the arcuate pipeline (3) comprises a middle pipe, two mutually symmetrical inclined pipes and two mutually symmetrical end pipes, characterized in that: The diameters and wall thicknesses of the middle pipe, the inclined pipe, and the end connection pipe are the same, and the overall arch of the arched pipe (3) is upward. A vertical strip-shaped connection pipe (4) penetrates through the outer circumferential wall of the middle pipe near the lower part, and the cross-section of the strip-shaped connection pipe (4) is a strip-shaped hole structure. The length direction of the strip-shaped hole is parallel to the axis of the middle pipe. The bottom end of the strip-shaped connection pipe (4) is communicated with a main filtration box (1). The main filtration box (1) is in the shape of a cuboid box, and the middle pipe and the strip-shaped connection pipe (4) are hermetically clamped with the same inclined partition plate (11). A same L-shaped partition plate (12) is fixed near the top between the front and rear inner walls of the main filtration box (1). The top end of the L-shaped partition plate (12) is hermetically butted with the bottom end of the inclined partition plate (11), and an inclined baffle (17) extending obliquely towards the opening of the main filtration box (1) is fixed at the bottom end of the L-shaped partition plate (12). Two symmetrically arranged sector-shaped water passing holes (171) are opened near the middle of the surface of the inclined baffle (17). A filter net (15) closely attached to the sector-shaped water passing holes (171) is arranged on the lower surface of the inclined baffle (17) at the positions of the two sector-shaped water passing holes (171), and a cleaning mechanism is arranged on the upper surface of the inclined baffle (17); a counter-flushing prevention mechanism for preventing large-particle debris from mixing with water flow to impact the filter net (15) is arranged inside the main filtration box (1) obliquely below the filter net (15), and a sealing side cover (5) is fixed at the opening of the main filtration box (1).

2. The water supply pipeline filtering device according to claim 1, characterized in that, The cleaning mechanism includes a converging pipe (9) embedded in the inclined pipe near one end of the water inlet. A sealing bearing is embedded near the top of the middle of the inclined partition plate (11), and a transmission rod (23) is rotatably connected in the sealing bearing. One end of the transmission rod (23) close to the converging pipe (9) is fixed with a propeller blade (10), and a small runner is fixed at the other end of the transmission rod (23) away from the converging pipe (9). A connecting rod (13) extending into the upper surface of the inclined baffle (17) is rotatably connected to the surface near the circumferential edge of the small runner; a trough-shaped slide rail (16) is fixed between the two sector-shaped water passing holes (171) on the upper surface of the inclined baffle (17), and symmetrically arranged L-shaped shaft rods (26) are respectively arranged on both sides of the trough-shaped slide rail (16). The top ends of the two L-shaped shaft rods (26) are respectively rotatably connected with symmetrically arranged folded cleaning rods (14), and the closer ends of the two folded cleaning rods (14) are hinged with the same double-headed hinge block (24); an arc-shaped notch (241) is opened at the top end of the double-headed hinge block (24), and the other end of the main shaft one is inserted into the other end of the connecting rod (13) through the bottom of the arc-shaped notch (241); two symmetrically arranged hinge holes (242) are opened near the bottom end of the side surface of the double-headed hinge block (24), and the size of the hinge holes (242) is adapted to the size of the L-shaped shaft rods (26).

3. The water supply pipeline filtering device according to claim 2, characterized in that, The inner diameter of the converging pipe (9) is smaller than the inner diameter of the end connection pipe, and reducing pipe joints (2) are hermetically fixed at the end connection pipes at both ends of the arched pipe (3).

4. The water supply pipeline filtering device according to claim 2, characterized in that, A boss slider (25) is slidably connected in the chute of the grooved slide rail (16), and the double-headed hinge block (24) is fixed to the boss slider (25) by screws. Ball bearings are embedded at the four corners near the upper and lower surfaces of the boss slider (25); hard bristles are implanted on one side of the folded cleaning rod (14) close to the filter screen (15).

5. The water supply pipeline filtering device according to claim 1, characterized in that A pressing frame (151) is fixed at the edge of the filter screen (15), and the pressing frame (151) is fixed to the lower surface of the inclined baffle (17) by screws.

6. The water supply pipeline filtering device according to claim 1, characterized in that, A sewage discharge pipe (102) is reserved in the middle of the bottom end of the main filter box (1), and a bottom cover (6) is screwed on the outer circumferential wall of the bottom end of the sewage discharge pipe (102).

7. The water supply pipeline filtering device according to claim 1, characterized in that, A strip-shaped jack (103) for inserting a strip-shaped connecting pipe (4) is opened at the top end of the main filter box (1), and the bottom end of the strip-shaped connecting pipe (4) is flush with the top inner wall of the main filter box (1). The bottom end of the inclined partition plate (11) is flush with the top inner wall of the main filter box (1); A sealing rubber strip is clamped in the middle of the top end of the L-shaped partition plate (12).

8. The water supply pipeline filtering device according to claim 1, characterized in that The anti-backflow mechanism includes arc-shaped baffles (8) fixed at equal distances on the inner walls of the front and rear sides of the main filter box (1). All the arc-shaped baffles (8) are distributed in a "W" shape in the longitudinal section, and blocking strips (7) with crossed bristles are fixed at the bottom ends of two adjacent arc-shaped baffles (8).

9. The water supply pipeline filtering device according to claim 8, wherein, The single bristles of the blocking strip (7) are tangent to the arc surface at the edge of the arc-shaped baffle (8), and the front view of two adjacent blocking strips (7) is in a V-shaped structure; a one-way anti-backflow effect can be formed; An observation window one (101) is arranged on the front surface of the main filter box (1).

10. A water supply pipeline filtering device according to claim 1, characterized in that, A spring stopper (21) is fixed in the middle of the vertical inner wall of the main filter box (1) far away from the opening, and an arc-shaped water collecting plate (22) is hinged at the top inner wall of the main filter box (1) near the spring stopper (21). A return spring (20) is fixed between the back surface of the arc-shaped water collecting plate (22) and the spring stopper (21), and the arc-shaped water collecting plate (22) does not affect the water outlet of the strip-shaped connecting pipe (4) usually; A fixed pulley frame is fixed on the lower surface of the L-shaped partition plate (12), and a fixed pulley is arranged in the fixed pulley frame. A pull rope (19) is fixed in the middle of the bottom end of the L-shaped partition plate (12). The pull rope (19) bypasses the top end of the fixed pulley and then passes through the arc-shaped baffle (8) downward to fix a counterweight ball (18).

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