A central water purification device

Abstract

The present invention belongs to the technical field of water purification equipment, and in particular, it relates to a central water purification equipment, including a purification pipe, a connection part, a self-cleaning pipe, a backwash part, a sewage discharge part and a filter element assembly, wherein the purification pipe and the self-cleaning pipe are connected in series through the connection part to form an annular shape, and the filter element assembly is filled in the purification pipe, the self-cleaning pipe and the connection part in an annular manner, and the self-cleaning pipe is serially installed with a backwash part and a sewage discharge part. Through the setting of the filter element assembly, the filter element assembly is annular, the rear part of the filter element assembly will filter the running water in the purification pipe, the front part of the filter element assembly will be cleaned by the backwash part and the sewage discharge part in the self-cleaning pipe, and there is a large length of compacted filter element assembly as a partition between the two sections, the cleaning position and the filtering position do not interfere with each other, and the filter element assembly can be rotated and replaced without disassembling, and the filter element can be cleaned without stopping the machine to ensure sufficient purification flux.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification equipment, and in particular to a central water purification equipment. Background Art

[0002] Central water purification equipment refers to central water treatment equipment that can filter out harmful substances in tap water and meet large-volume drinking water needs. Its core technology is to filter impurities in tap water through a variety of filter elements to ensure drinking safety.

[0003] The patent application document with the patent number CN216639167U discloses a central water purification device that can remind the system of blockage by voice. When the pretreatment unit or the membrane filtration unit is blocked or the water quality monitoring unit monitors that the effluent water quality does not meet the requirements, the voice broadcast module of the control system reminds the operation and maintenance personnel of the central water purification device of the faulty part through voice, and automatically shuts down the central water purification device through the automatic control module to prevent the operation and maintenance personnel from delaying the maintenance process due to failure to check in time, thereby achieving the purpose of intelligent maintenance of the central water purification device;

[0004] However, when the filter unit is blocked and closed, the central water purification equipment will stop working. During the replacement and cleaning of the filter unit, it cannot meet the large-volume drinking water demand. For this reason, we propose a central water purification equipment to solve the above problem. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art and to propose a central water purification device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A central water purification device comprises a purification pipe, a connection part, a self-cleaning pipe, a backwash part, a sewage discharge part and a filter element assembly, wherein the purification pipe and the self-cleaning pipe are connected in series through the connection part to form an annular shape, and the filter element assembly is filled in the purification pipe, the self-cleaning pipe and the connection part in an annular manner, and the backwash part and the sewage discharge part are installed in series on the self-cleaning pipe. The purification pipe comprises a main pipe with connecting rings at both ends, and a water distribution trough is arranged on the side of the connecting ring facing the filter element assembly; the backwash part comprises a clamp composed of an upper and a lower part, a water supply channel is arranged in the clamp, and the clamp faces one side of the filter element assembly. The side is provided with a circular array of backflush holes; the sewage discharge part: including a shell with a wide-diameter cavity built in, the shell is located at the lower inner side of the wide-diameter cavity and is provided with a rotary push part that pushes the filter element assembly to the left through the spiral part, the right end of the rotary push part is installed with a blade, and the water supply channel is installed with a bypass pipe that drives the blade to rotate through water flow; the filter element assembly: including a middle rope connected end to end through a locking piece, a filter frame with a filter screen embedded in it is installed in series on the middle rope, and the side walls at the edges of the adjacent filter frames are connected in series through a ring cloth, the filter frame and the ring cloth are surrounded to form a filter cavity, and a filter filler is arranged in the filter cavity;

[0008] During the filtering of tap water, the tap water will pass through the purification pipe from left to right and be filtered through the rear half of the filter element assembly. After the rear half of the filter element assembly has been used for filtering for a period of time, water is supplied to the recoil hole through the water supply channel, and the spiral portion will drive the front half of the filter element assembly to move left, and the recoil hole will flush and self-clean the filter filler. During the movement of the filter element assembly, the cleaned filter element assembly will be automatically replaced in the purification pipe, realizing continuous self-cleaning without stopping the machine.

[0009] Preferably, the inner diameter of the circumference of the water distribution tank is larger than the inner diameter of the main pipe, and the circumferential side wall of the filter frame is in pressing contact with the inner wall of the main pipe;

[0010] In order to ensure the passing rate of tap water, the tap water entering the main pipe will be dispersed in the water distribution trough, so that the tap water can pass evenly around the filter frame, and the dispersed passage can ensure the full utilization of the filter screen and filter filler.

[0011] Preferably, a middle hole is provided in the middle of the filter frame, and a wear-resistant ring is installed at the middle hole to be in sliding contact with the middle rope;

[0012] In order to prevent the middle hole of the filter frame from being worn, resulting in a gap that is too large and the tap water does not pass through the filter directly from the middle hole, wear-resistant rings are used to prevent the gap from being too large, thereby ensuring the cleaning effect of the filtration.

[0013] Preferably, the filter filler includes filter cotton and filter sand, the filter cotton is attached to the filter screen, and the filter sand fills at most two-thirds of the total volume of the filter cavity;

[0014] The filter sand can accommodate large debris, and the filter cotton can ensure that small particles are filtered out. When the filter element assembly passes through the curved connection position, the filter sand is compacted to prevent the tap water at the rear and the backwash water at the front from communicating with each other. At the rotary push position, the filter frames move away from each other and unfold the ring cloth, which can improve the cleaning effect.

[0015] Preferably, the rotary push portion comprises a rotating roller with a central axis arranged at the axis center, and the spiral portion is arranged to press and contact the outer wall of the filter frame;

[0016] The middle shaft can connect the roller and the blades. The middle shaft is rotatably connected to the right side wall of the outer shell through a sealed bearing. The upper part of the spiral part presses against the outer wall of the filter frame to ensure that the spiral part squeezes the ring cloth and overlaps with the circumferential side wall of the filter frame, thereby ensuring a large contact area at the overlapping position, thereby ensuring stable contact during pushing and preventing slipping from affecting the pushing efficiency.

[0017] Preferably, a straight pipe section for rotating multiple blade groups is provided at the rear of the bypass pipe, and the straight pipe section is coaxially arranged with the central axis;

[0018] The straight pipe section is relatively long and can accommodate multiple groups of blades to rotate synchronously, thereby increasing the contact area and making full use of the water flow. The straight pipe section is coaxially arranged with the central axis, so that the water flow can impact the blades vertically and provide the greatest possible rotational driving force.

[0019] Preferably, the outer edge of the spiral portion is located below the roller and is close to the inner wall of the lower part of the shell. The shell is located at the lower left part of the roller and is provided with a drainage pipe. The top of the drainage pipe is provided with a slag collecting port which is higher on the left and lower on the right.

[0020] The lower outer edge of the spiral part is close to the lower inner wall of the shell, which can push the impurities in the lower inner side of the shell to the left while pushing the filter element assembly to the left, thereby avoiding the accumulation of debris inside the shell. The slag collecting port that is higher on the left and lower on the right ensures that all debris can enter the drain pipe, preventing debris from passing over the left side of the drain pipe and being unable to enter, thereby ensuring thorough slag discharge.

[0021] Preferably, the anti-blocking assembly comprises a cone head inserted into the recoil hole, an inner spring is arranged at the end of the cone head, and the cone head is connected to the sliding plug through a connecting rope;

[0022] The cone head can be inserted into the recoil hole when not flushing and compressed by an internal spring. When water is supplied for recoil, the sliding plug moves backward to pull the cone head out of the recoil hole through the connecting rope to achieve water conduction and spraying.

[0023] Preferably, the water supply channel comprises a serial connection hole, a sliding plug is provided in the water supply channel and is slidably blocked at the lower part of the serial connection hole, and a spring is installed at the rear end of the sliding plug;

[0024] After water enters the water supply channel, the water pressure drives the sliding plug to move backward, releasing the front of the serial hole so that water can flow smoothly. When there is no water supply, the spring pushes the sliding plug forward to reset the cone head and relax it to reset it. When the cone head is stuck and cannot be reset, the sliding plug can block the serial hole. When the water is supplied next time, the water pressure can spray out the debris on the upper part, preventing the debris from penetrating into the water supply channel unobstructed and making it impossible to discharge.

[0025] Preferably, the clamp is sealed and clamped with the transition pipe and the outward protruding edge of the shell through a clamping groove, a sealing ring with an inward folded skirt is arranged in the clamping groove, and a connecting hole is opened between the clamping groove and the water supply channel;

[0026] The outward-turned convex edges of the transition pipe and the outer shell can be clamped into the clamping groove of the clamp, and the sealing ring can seal the joint position through its own expansion deformation. During recoil, in order to avoid water leakage in the joint due to increased water pressure, water will enter the annular cavity formed by the inner folded skirt, the sealing ring and the inner wall of the clamping groove through the connecting hole, and the sealing ring will be further squeezed toward the outward-turned convex edge by the water pressure, thereby improving the sealing effect of the joint position.

[0027] Compared with the prior art, the advantages of this central water purification equipment are:

[0028] Through the setting of the filter element assembly, the filter element assembly is annular, the rear part of the filter element assembly will filter the flowing tap water in the purification pipe, and the front part of the filter element assembly will be cleaned by the backwash part and the sewage discharge part in the self-cleaning pipe, and there is a long length of compacted filter element assembly as a partition between the two sections, the cleaning position and the filtering position do not interfere with each other, and the filter element assembly can be rotated and replaced without disassembly, and the filter element can be cleaned without stopping the machine to ensure sufficient purification flux;

[0029] Through the setting of the sewage discharge part, a rotary push part is arranged inside the sewage discharge part. When the filter element assembly is cleaned, the rotary push part is impacted by the backwash water pressure to make the blade rotate, and then the filter element assembly is driven from right to left through the backwash part and the sewage discharge part through the spiral part. At the same time, the cleaned filter element assembly will be pushed from left to right into the purification pipe. During cleaning, the filter element assembly can be driven by the backwash water pressure to be transposed, thereby improving the degree of automation of transposition self-cleaning;

[0030] Through the setting of the anti-blocking component, when the water supply channel is not supplied with water, the spring will push the sliding plug to the front of the serial hole. At this time, the cone head will be inserted into the recoil hole under the action of the inner spring to prevent sewage from entering the water supply channel and causing blockage. When the water supply channel is supplied with water, the water pressure will push the sliding plug to press against the front end of the limit slide. At this time, the sliding plug will drive the cone head to compress the inner spring and disengage from the recoil hole at the same time. At this time, the serial hole is half opened to allow water to flow into the recoil hole to clean the filter element component, completing the mechanical unlocking of the water supply channel with good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a left side schematic diagram of the present invention;

[0032] Figure 2 It is an enlarged structural diagram of the self-cleaning pipe fitting of the present invention;

[0033] Figure 3 It is a structural schematic diagram of the filter element assembly of the present invention;

[0034] Figure 4 It is a schematic diagram of the disassembly of the purification pipe fitting of the present invention;

[0035] Figure 5 It is a cross-sectional schematic diagram of the sewage discharge part of the self-cleaning pipe fitting of the present invention;

[0036] Figure 6 It is a schematic diagram of the disassembly of the recoil part in the self-cleaning pipe fitting of the present invention;

[0037] Figure 7 It is a cutaway schematic diagram of the recoil portion of the present invention;

[0038] Figure 8 It is a cutaway schematic diagram of the anti-blocking structure in the recoil part of the present invention;

[0039] Fig. 9 It is a schematic cross-sectional view of the recoil portion of the present invention.

[0040] In the figure: purification pipe 1, main pipe 11, connecting ring 12, water distribution groove 121, water pipe 13, connecting part 2, self-cleaning pipe 3, transition pipe 31, recoil part 4, clamp 41, water supply channel 42, relay pipe 421, water inlet part 422, water distribution ring groove 423, water return part 424, recoil hole 43, cone head 431, outer pipe 432, inner pipe 433, connecting rope 434, through-hole 435, support rope 436, inner spring 437, clamping groove 44, sealing ring 441, inner folded skirt 442, connecting hole 443, sliding plug 4 5. Spring 451, end cap 452, plane part 453, limit slide 454, serial hole 455, sewage discharge part 5, shell 51, outward protrusion 511, wide diameter cavity 52, drainage pipe 53, slag collection port 531, rotary push part 54, central axis 541, roller 542, spiral part 543, blade 544, bypass pipe 545, filter element assembly 6, middle rope 61, wear-resistant ring 611, lock 612, filter frame 62, circumferential side wall 621, filter screen 622, conical convex part 623, ring cloth 63, filter cotton 64, filter sand 65. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example 1

[0042] Reference Figure 1-5 A central water purification device, a central water purification device, comprises a purification pipe 1, a connection part 2, a self-cleaning pipe 3, a recoil part 4, a sewage discharge part 5 and a filter element assembly 6, the purification pipe 1 and the self-cleaning pipe 3 are connected in series through the connection part 2 to form a ring shape, the filter element assembly 6 is filled in the purification pipe 1, the self-cleaning pipe 3 and the connection part 2 in an annular manner, the recoil part 4 and the sewage discharge part 5 are installed in series on the self-cleaning pipe 3, the purification pipe 1: comprises a main pipe 11 with connecting rings 12 at both ends, and the connecting ring 12 is provided with a water distribution groove 121 on the side facing the filter element assembly 6; the recoil part 4: comprises a clamp 41 combined with an upper and a lower part, the clamp 41 is provided with a water supply channel 42, the clamp 41 faces the filter element assembly 6 on one side One side is provided with a circular array of backflushing holes 43; the sewage discharge part 5: includes a shell 51 with a wide-diameter cavity 52 built in, the shell 51 is located at the lower inner side of the wide-diameter cavity 52 and is provided with a rotary push part 54 for pushing the filter element assembly 6 to the left by rotation, a blade 544 is installed at the right end of the rotary push part 54, and a bypass pipe 545 for driving the blade 544 to rotate by water flow is installed on the water supply channel 42; the filter element assembly 6: includes a middle rope 61 connected end to end by a locking piece 612, a filter frame 62 with a filter screen 622 embedded in it is installed in series on the middle rope 61, and the side walls at the edges of adjacent filter frames 62 are connected in series through a ring cloth 63, the filter frame 62 and the ring cloth 63 are surrounded to form a filter cavity, and a filter filler is arranged in the filter cavity.

[0043] When filtering tap water, the tap water will pass through the main pipe 11 of the purification pipe 1 from left to right. The filter element assembly 6 connects the filter frame 62 in series through the middle rope 61 to form a ring. The filter cavity between the filter frame 62 is filled with filter fillers to improve the interception effect of solid debris. The tap water contacts the left part of the rear half of the filter element assembly 6 through the water distribution groove 121 of the connecting ring 12, and then flows to the right by water pressure. The filter filler and the filter screen 622 will filter the tap water to remove solid impurities. After the rear half of the filter element assembly 6 is used for filtering for a period of time, water is supplied to the recoil hole 43 of the clamp 41 through the water supply channel 42, and the clamp 41 is combined up and down to form a The backwash hole 43 with an opening tilted to the left will evenly flush the filter filler to the left. When the filter element assembly 6 moves to the wide-diameter cavity 52, the backwash water will flow out of the filter element assembly 6 from the ring cloth 63 to clean the filter filler. The backwash water will impact the blade 544 at the bypass pipe 545 to rotate the rotary push part 54, and then the spiral part 543 will use the threaded push method to drive the front half of the filter element assembly 6 to move to the left, so that the filter element assembly 6 moves as a whole, ensuring that the left part of the front half of the filter element assembly 6 after cleaning will be replaced in the purification pipe 1, so as to realize continuous self-cleaning without stopping the machine. Example 2

[0044] Reference Figure 1-4A central water purification device includes a purification pipe 1, a connecting part 2, a self-cleaning pipe 3, a backwash part 4, a sewage discharge part 5 and a filter element assembly 6. The filter element assembly 6 includes a middle rope 61 connected end to end by a locking part 612, a filter frame 62 with a filter screen 622 embedded therein is installed in series on the middle rope 61, and the side walls at the edges of adjacent filter frames 62 are connected in series through a ring cloth 63. The filter frame 62 and the ring cloth 63 are surrounded to form a filter cavity, and a filter filler is arranged in the filter cavity.

[0045] Specifically, the circumferential inner diameter of the water distribution tank 121 is larger than the inner diameter of the main pipe 11 , the filter element assembly 6 slides in the main pipe 11 , the circumferential side wall 621 of the filter frame 62 is pressed against the inner wall of the main pipe 11 , and a water pipe 13 is provided at the top of the connecting ring 12 .

[0046] Furthermore, a middle hole is provided in the middle of the filter frame 62, and a wear-resistant ring 611 is installed at the middle hole position to be in sliding contact with the middle rope 61. A ridge is provided in the middle of the wear-resistant ring 611, and the filter frame 62 is clamped with the outer wall of the wear-resistant ring 611 through the ridge.

[0047] Furthermore, the middle part of the filter frame 62 protrudes horizontally to form a conical convex part 623, and the filter filler includes filter cotton 64 and filter sand 65. The filter cotton 64 is attached to the filter screen 622, and the filter sand 65 fills at most two-thirds of the total volume of the filter cavity.

[0048] When supplying water, in order to ensure the passage rate of tap water, the water pipe 13 on the left supplies water, and the water pipe 13 on the right discharges the purified tap water. The tap water to be filtered that enters the main pipe 11 will be dispersed in the water distribution tank 121, so that the tap water passes evenly around the filter frame 62, and the dispersed passage can ensure the full utilization of the filter screen 622 and the filter filler. In order to prevent the middle hole of the filter frame 62 from being worn, resulting in a gap that is too large and the tap water does not pass through the filter screen 622 directly from the middle hole, the wear-resistant ring 611 is used for anti-wear reinforcement to prevent the gap from being too large, so as to ensure the cleaning effect of the filtration. The middle part of the wear-resistant ring 611 is clamped with the wear-resistant ring 611 through a ridge to prevent the two from detaching and ensure a stable connection. The wear-resistant ring 611 can also be pushed out and replaced after wear, which is convenient for maintenance. The filter cotton 64 and the filter sand 65 are arranged in a ring, and the filter sand 65 can accommodate approximately The conical convex part 623 can accommodate more filter sand 65, and when squeezed, they can be plugged into each other to prevent dislocation. The filter cotton 64 can ensure that small-volume particles are filtered out, and when the filter element assembly 6 passes through the curved connection part 2, the filter frame 62 is close to each other due to friction, resulting in the filter sand 65 being compacted to reduce the water passing rate, preventing the rear tap water and the front backwash water from communicating with each other, and ensuring the cleanliness of the tap water; and at the position of the rotary push part 54, when the filter frame 62 is pushed, the ring cloth 63 is unfolded, and at this time, the filter sand 65 and the filter cotton 64 are relaxed to enlarge the gap between them, which can improve the backwash water to more thoroughly penetrate and flush the filter filler. The filter sand 65 fills at most two-thirds of the total volume of the filter chamber, which can leave space for the gap change when the filter frame 62 is squeezed and relaxed, and also avoid being too tight to affect the cleaning effect. Example 3

[0049] Reference Figure 2 , 5 -7, a central water purification device, comprising a purification pipe 1, a connecting part 2, a self-cleaning pipe 3, a backwash part 4, a sewage discharge part 5 and a filter element assembly 6, the purification pipe 1 and the self-cleaning pipe 3 are connected in series through the connecting part 2 to form a ring shape, the filter element assembly 6 is filled in the purification pipe 1, the self-cleaning pipe 3 and the connecting part 2 in a ring shape, the backwash part 4 and the sewage discharge part 5 are installed in series on the self-cleaning pipe 3, the sewage discharge part 5: comprises a shell 51 with a wide diameter cavity 52 built in, the shell 51 is located at the lower inner side of the wide diameter cavity 52 and is provided with a rotary push part 54 for pushing the filter element assembly 6 to the left through a spiral part 543, a blade 544 is installed at the right end of the rotary push part 54, and a bypass pipe 545 for driving the blade 544 to rotate by water flow is installed on the water supply channel 42.

[0050] Specifically, the rotary push portion 54 includes a cylindrical roller 542 , a central axis 541 is coaxially arranged at the axis of the roller 542 , and a spiral portion 543 that is in compression contact with the filter frame 62 is arranged on the circumferential outer wall of the roller 542 .

[0051] It is worth noting that the water supply channel 42 includes a relay pipe 421 arranged in the middle of the arc side wall of the clamp 41, and the relay pipe 421 has a water inlet part 422 and a water return part 424 that block each other. The bypass pipe 545 is connected in series between the water inlet part 422 and the water return part 424. A straight pipe section for the blades 544 to rotate is arranged at the rear of the bypass pipe 545, and the straight pipe section is coaxially arranged with the central axis 541.

[0052] It is worth noting that the outer edge of the spiral portion 543 located below the roller 542 is close to the inner wall of the lower part of the shell 51, and the shell 51 is provided with a drainage pipe 53 at the lower left part of the roller 542. The top of the drainage pipe 53 is provided with a slag collecting port 531 which is higher on the left and lower on the right.

[0053] To ensure thorough cleaning, the central axis 541 can connect the roller 542 and the blade 544. The central axis 541 is rotatably connected to the right side wall of the shell 51 through a sealed bearing. The upper part of the spiral portion 543 presses against the outer wall of the filter frame 62, which can ensure that the spiral portion 543 squeezes the ring cloth 63 and overlaps with the circumferential side wall 621 of the filter frame 62, ensuring a large contact area at the overlapping position, thereby ensuring stable contact during pushing and preventing slippage from affecting the pushing efficiency. The water inlet portion 422 and the water return portion 424 on the relay pipe 421 block each other, so that the bypass pipe 545 can be installed in series on the left side of the relay pipe 421, and form a connected water channel. The straightness of the bypass pipe 545 is The pipe section is long enough to accommodate multiple groups of blades 544 rotating synchronously, thereby increasing the contact area to fully utilize the water flow, and the straight pipe section is coaxially arranged with the central axis 541, so that the water flow can vertically impact the blades 544, providing as much rotational driving force as possible. The lower outer edge of the spiral portion 543 is close to the lower inner wall of the outer shell 51, which can push the impurities in the lower inner side of the outer shell 51 to the left while pushing the filter element assembly 6 to move left, thereby avoiding the accumulation of debris inside the outer shell 51, and the slag collecting port 531 with a higher left and lower right position ensures that all debris can enter the drain pipe 53, preventing debris from passing over the left part of the drain pipe 53 and failing to enter, thereby ensuring thorough slag discharge. Example 4

[0054] Reference Figure 2 and 6-9, a central water purification device, comprising a purification pipe 1, a connecting part 2, a self-cleaning pipe 3, a backwash part 4, a sewage discharge part 5 and a filter element assembly 6, the purification pipe 1 and the self-cleaning pipe 3 are connected in series through the connecting part 2 to form an annular shape, the filter element assembly 6 is filled in the purification pipe 1, the self-cleaning pipe 3 and the connecting part 2 in an annular manner, the backwash part 4 and the sewage discharge part 5 are installed in series on the self-cleaning pipe 3, the backwash part 4: comprises a clamp 41 combined with an upper and a lower part, a water supply channel 42 is arranged in the clamp 41, and a backwash hole 43 arranged in an annular array is opened on one side of the clamp 41 facing the filter element assembly 6; the sewage discharge part 5: comprises a shell 51 with a wide-diameter cavity 52 built in, the shell 51 is located at the lower inner side of the wide-diameter cavity 52 and is provided with a rotary push part 54 that pushes the filter element assembly 6 to the left through a spiral part 543, a blade 544 is installed on the right end of the rotary push part 54, and a bypass pipe 545 that drives the blade 544 to rotate by water flow is installed on the water supply channel 42.

[0055] Specifically, the water supply channel 42 includes a semi-annular water distribution groove 423 arranged in the clamp 41, the water distribution groove 423 is connected to the recoil hole 43, the anti-blocking component includes a cone head 431 inserted in the recoil hole 43, the end of the cone head 431 is installed with a sliding outer tube 432 and an inner tube 433, an inner spring 437 is installed between the cone head 431 and the inner tube 433, the cone head 431 is connected to the middle notch of the sliding plug 45 through a support rope 436 and a connecting rope 434, and the inner tube 433 is provided with a through hole 435 at one end away from the cone head 431 for the connecting rope 434 to pass freely.

[0056] Furthermore, the water supply channel 42 includes a serial connection hole 455 arranged at the bottom end of the water distribution ring groove 423, and a sliding plug 45 is provided in the water supply channel 42 to slide and block the lower part of the serial connection hole 455. A notch is provided in the middle of the sliding plug 45, and a spring 451 is installed at the rear end of the sliding plug 45. The rear end of the spring 451 is fixed by an end cap 452. Planar portions 453 are provided at the rear of the left and right sides of the sliding plug 45, and a limiting slide 454 that slides with the planar portion 453 is provided on the inner wall of the water supply channel 42.

[0057] Furthermore, a plurality of recoil parts 4 and sewage discharge parts 5 are arranged side by side, and the outer shells 51 are connected and conducted via the transition pipe 31. The ends of the outer shell 51 and the transition pipe 31 are provided with outward-turned flanges 511. The clamp 41 is sealed and clamped with the transition pipe 31 and the outward-turned flange 511 of the outer shell 51 through the clamping groove 44. A sealing ring 441 is provided in the clamping groove 44. A connecting hole 443 is opened between the clamping groove 44 and the water distribution ring groove 423. The sealing ring 441 is provided with an inward folded skirt 442 on the side facing the water distribution ring groove 423.

[0058] To ensure stable recoil operation, the cone head 431 can be inserted into the recoil hole 43 when not flushing, and is compressed by the inner spring 437. The flexible cone head 431 and the inner spring 437 are guided by the outer tube 432 and the inner tube 433 that are slidably mounted to prevent the cone head 431 from being completely separated from the cone head 431 due to twisting or deviation. When water is supplied for recoil, the sliding plug 45 moves backward and drives the supporting rope 436 through the connecting rope 434, so that all the cone heads 431 are synchronously pulled out of the recoil hole 43 for a distance, so that the recoil hole 43 is turned on to spray water, and the inner tube 433 is away from the cone head 431. A through hole 435 is provided at one end of the water supply channel 42 for the free passage of the connecting rope 434, which can ensure that the position of the connecting rope 434 is limited to a certain range for pulling and pulling, and avoids entanglement and knotting caused by being close to each other. After the backwash water enters the water supply channel 42, the sliding plug 45 is driven by water pressure to move backward, and the front part of the serial hole 455 is released, so that the water flow can smoothly pass through the serial hole 455 into the water distribution ring groove 423. The notch is used to install a pin rod to facilitate fixing the lower end of the connecting rope 434, and the flat part 453 and the limiting slide 454 are slidably connected to ensure that the sliding plug 45 slides vertically without twisting. To prevent the sliding plug 45 from being entangled with the connecting rope 434 and getting stuck in the water supply channel 42, when there is no water supply, because the end cap 452 fixes the rear end of the spring 451, the rebound of the spring 451 will push the sliding plug 45 to move forward and reset, loosen the cone head 431 to achieve reset. When the cone head 431 is stuck and cannot be reset, the sliding plug 45 can block the serial hole 455. When the water is supplied next time, the water pressure can spray out the debris on the upper part, preventing the debris from penetrating into the water supply channel 42 without obstruction and being unable to be discharged. A plurality of recoil parts 4 and sewage discharge parts 5 are arranged side by side, so that continuous multiple flushing can be performed. , to ensure thorough cleaning, the outward-turned convex edge 511 of the transition pipe 31 and the outer shell 51 can be clamped with the clamping groove 44 of the clamping hoop 41 to ensure the sealing effect of the joint position, and the sealing ring 441 can seal the joint position through its own expansion deformation, and during backwashing, in order to avoid water leakage at the joint caused by the increased water pressure, water will enter the annular cavity formed by the inner folded skirt 442, the sealing ring 441 and the inner wall of the clamping groove 44 through the connecting hole 443, and the sealing ring 441 will be further squeezed toward the outward-turned convex edge 511 by the water pressure, thereby improving the sealing effect of the joint position.

[0059] The automatic equipment involved in the embodiment adopts a molded product provided by the manufacturer, and its supporting control system, electromagnetic switch and circuit pipeline can also be provided by the manufacturer. In addition, the power supply module, circuit and electronic components and control module involved in the present invention are all prior art, which can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to the internal structure and method.

[0060] The above are only preferred specific implementation modes 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 solutions and inventive concepts 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 central water purification device, comprising a purification pipe (1), a connecting portion (2), a self-cleaning pipe (3), a backwashing portion (4), a sewage discharge portion (5) and a filter element assembly (6), wherein the purification pipe (1) and the self-cleaning pipe (3) are connected in series via the connecting portion (2) to form a ring shape, the filter element assembly (6) is filled in the purification pipe (1), the self-cleaning pipe (3) and the connecting portion (2) in a ring shape, and the backwashing portion (4) and the sewage discharge portion (5) are installed in series on the self-cleaning pipe (3). It is characterized in that The purification pipe (1) comprises a main pipe (11) with connecting rings (12) at both ends, the connecting ring (12) being provided with a water distribution trough (121) on the side facing the filter element assembly (6), and a water pipe (13) being provided at the top of the connecting ring (12), the water pipe (13) at the left side being used to supply water, and the water pipe (13) at the right side being used to discharge purified tap water; The recoil portion (4) comprises a hoop (41) combined with an upper and a lower part, wherein a water supply channel (42) is provided in the hoop (41), and recoil holes (43) arranged in an annular array are provided on one side of the hoop (41) facing the filter element assembly (6); The sewage discharge part (5) comprises a housing (51) having a wide-diameter cavity (52) therein, a rotary push part (54) for pushing the filter element assembly (6) to the left through a spiral part (543) being provided at the lower inner side of the wide-diameter cavity (52), a blade (544) being installed at the right end of the rotary push part (54), a bypass pipe (545) being installed on the water supply channel (42), and the bypass pipe (545) containing a blade (544) driven to rotate by water flow; The filter element assembly (6) comprises a middle rope (61) connected end to end by a locking member (612), a filter frame (62) embedded with a filter screen (622) being mounted in series on the middle rope (61), the side walls at the edges of adjacent filter frames (62) being connected in series by a ring cloth (63), the filter frame (62) and the ring cloth (63) being arranged to form a filter cavity, a filter filling material being arranged in the filter cavity, the filter filling material comprising filter cotton (64) and filter sand (65), the filter cotton (64) being attached to the filter screen (622), and the circumferential side wall (621) of the filter frame (62) being in pressing contact with the inner wall of the main pipe (11); The rotary push portion (54) comprises a roller (542) with a central axis (541) arranged at the axis center, a spiral portion (543) being arranged on the circumferential outer wall of the roller (542), and the spiral portion (543) is arranged to press against the outer wall of the filter frame (62); When the rotary push portion (54) pushes the filter element assembly (6), the filter frames (62) move away from each other to unfold the ring cloth (63), and when the filter element assembly (6) moves to the position of the wide-diameter cavity (52), the backwash water flows out of the filter element assembly (6) from the position of the ring cloth (63); When the filter element assembly (6) passes through the curved connection portion (2), the filter frames (62) are brought closer together due to friction, causing the filter sand (65) to be compacted, thereby reducing the water passing rate and preventing the tap water at the rear from flowing into the backwash water at the front.

2. A central water purification device according to claim 1, It is characterized in that The circumferential inner diameter of the cloth water tank (121) is greater than the inner diameter of the main pipe (11).

3. A central water purification device according to claim 2, characterized in that, a middle hole is provided in the middle of the filter rack (62), and a wear-resistant ring (611) that is in sliding contact with the middle rope (61) is installed at the position of the middle hole.

4. A central water purification device according to claim 3, characterized in that, the filter sand (65) fills at most two-thirds of the total volume of the filter chamber.

5. A central water purification device according to claim 1, characterized in that, a straight pipe section for multiple groups of blades (544) to rotate is provided at the rear of the bypass pipe (545), and the straight pipe section is coaxially arranged with the central axis (541).

6. A central water purification device according to claim 5, characterized in that, the spiral part (543) is close to the inner wall of the lower part of the outer shell (51) at the outer edge below the roller (542), a drain pipe (53) is provided through the lower left part of the outer shell (51) where the roller (542) is located, and a slag collection port (531) with a higher left side and a lower right side is opened at the top end of the drain pipe (53).

7. A central water purification device according to claim 1, characterized in that, it includes an anti-blocking component, the anti-blocking component includes a tapered head (431) inserted into the anti-punching hole (43), an inner spring (437) is provided at the end of the tapered head (431), and the tapered head (431) is connected to the sliding plug (45) through a connecting rope (434).

8. A central water purification device according to claim 7, characterized in that, the water supply channel (42) includes a series connection hole (455), a sliding plug (45) that is blocked at the lower part of the series connection hole (455) is provided in the water supply channel (42), and a spring (451) is installed at the rear end of the sliding plug (45).

9. A central water purification device according to claim 8, characterized in that, the hoop (41) is hermetically clamped with the transition pipe (31) and the outer turning flange (511) of the outer shell (51) through a clamping groove (44), a sealing ring (441) with an inner folded skirt (442) is provided in the clamping groove (44), and a communication hole (443) is opened between the clamping groove (44) and the water supply channel (42).

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