Convenient backwashing three-way valve for filter

Abstract

The invention discloses a convenient backwashing three-way valve for a filter, and relates to the technical field of valves. Comprising a three-way valve body, a control rod is arranged in the three-way valve body, and a driving assembly used for driving the control rod is arranged at the top of the three-way valve body; the three-way valve body comprises a valve body and a valve cover arranged at the top of the valve body, a water inlet and a filter port are formed in the two ends of the valve body respectively, a drain outlet is formed in the position, close to the filter port, of the bottom of the valve body, a diaphragm pad is arranged at the bottom of the valve cover, and flow collecting bases are arranged at the positions, located at the water inlet and the drain outlet, in the valve body. An inner hole of the flow collecting seat is round, and sliding grooves are formed in the two sides of the inner wall of the valve body. When sewage discharging operation is carried out, the diaphragm pad is protected through the baffle, the diaphragm pad is prevented from being washed by sewage, the diaphragm pad cannot be damaged, the service life of the diaphragm pad is guaranteed, the replacement frequency is reduced, the use cost is reduced, the use requirement of a user is met, meanwhile, the sewage can rapidly flow out of the valve body, and the water consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a convenient backwashing three-way valve for a filter. Background Art

[0002] The backwash three-way valve is mainly used on the filter. The filter is a precision device that uses a filter to directly intercept impurities in the water, remove suspended matter and particulate matter in the water, reduce turbidity, purify water quality, reduce system dirt, bacteria, algae, rust, etc., to purify water quality and protect the normal operation of other equipment in the system.

[0003] In the prior art, when the backwash three-way valve on the market is discharging sewage, the diaphragm will be directly flushed by sewage. The sewage contains a large amount of impurities, which will corrode the diaphragm. Some hard impurities will also scratch the surface of the diaphragm when flushing the diaphragm, which will greatly affect the sealing of the diaphragm and greatly increase the replacement frequency, causing serious troubles to users. At the same time, the sewage impacts the diaphragm pad, which will deform to a certain extent, which is not conducive to the discharge of sewage and causes a large amount of water consumption. Summary of the invention

[0004] To achieve the above object, the present invention provides the following technical solution: a convenient backwashing three-way valve for a filter, comprising a three-way valve body, a control rod is arranged inside the three-way valve body, and a driving assembly for driving the control rod is arranged on the top of the three-way valve body; The three-way valve body comprises a valve body and a valve cover arranged on the top of the valve body, a water inlet and a filter port are respectively arranged at two ends of the valve body, a sewage outlet is arranged at the bottom of the valve body near the filter port, a diaphragm pad is arranged at the bottom of the valve cover, a current collecting seat is arranged inside the valve body at the position of the water inlet and the sewage outlet, the inner hole of the current collecting seat is circular, and slide grooves are arranged on both sides of the inner wall of the valve body; The control rod is located inside the collector seat, one end of the control rod extends to the inside of the sewage outlet and is provided with a valve plate, the other end of the control rod extends to the bottom of the diaphragm pad and is provided with a transmission rod, and the top end of the transmission rod penetrates the diaphragm pad and the valve cover and extends to the inside of the drive assembly; A fixing rod is fixedly arranged inside the control rod, and two sleeves are movably sleeved on the fixing rod and are respectively located on both sides of the transmission rod, and a semicircular baffle is arranged on one side of the sleeve, and the two baffles are combined to form a circle, and one side of the two baffles combined to form a circle is fitted with one side of the current collecting seat to cover the inner hole of the current collecting seat; A rotating shaft connected to the two sleeves is movably arranged inside the two ends of the fixed rod, and the two ends of the fixed rod extend to the inside of the two slide grooves, and a rack is fixedly arranged on one side of the inner wall of the slide groove. One end of the rotating shaft extends to the inside of the slide groove and is provided with a sub-gear connected to the rack; The driving assembly comprises a screw rod and a motor for driving the screw rod. A nut seat is movably sleeved on the screw rod, and the top of the transmission rod is sleeved with the inside of the nut seat.

[0005] As a preferred technical solution of the present invention, two slides are symmetrically arranged at both ends of the fixed rod, and at least one ball is movably embedded in the end of the slide away from the fixed rod. The surface of the ball is slidably connected to one side of the inner wall of the slide groove, and support frames are fixedly arranged on the top of both ends of the fixed rod.

[0006] As a preferred technical solution of the present invention, a pinion is provided on one side of the top of the support frame for rotation through an axis rod, a main gear is provided on the side of the pinion away from the support frame, the diameter of the main gear is larger than that of the pinion, the main gear and the sub-gear have the same diameter, the main gear and the pinion are coaxially arranged, the main gear is meshed with the rack, and the pinion and the sub-gear are connected through a transmission chain.

[0007] As a preferred technical solution of the present invention, a rubber sleeve is provided on the inner wall of the valve body and is located outside the slide groove. The interior of the rubber sleeve is fixedly sleeved with the surface of the fixed rod. A slide hole is provided on the surface of the fixed rod located inside the sleeve. A connecting block is provided at one end of the rotating shaft away from the pinion gear. An end of the connecting block away from the rotating shaft passes through the slide hole and is fixedly connected to the interior of the sleeve.

[0008] As a preferred technical solution of the present invention, a circular hole which is sleeved with the surface of the control rod is opened in the two baffles and a rubber ring is arranged inside the circular hole. The outer ring of the baffle is provided with a deflector which is arc-shaped.

[0009] As a preferred technical solution of the present invention, the drive assembly also includes a shell, which is fixedly arranged on the top of the valve cover, and the screw rod and the motor are arranged inside the shell. An opening is also arranged on one side of the shell, and the internal movable sleeve of the opening is provided with a silicone sealing cover.

[0010] As a preferred technical solution of the present invention, the sewage outlet is in the shape of a cone with a small diameter at the top and a large diameter at the bottom. A circle of sealing gasket 1 and a sealing ring located inside the sealing gasket 1 are provided at the top of the inner wall of the sewage outlet. A sealing gasket 2 is provided on one side of the collecting seat and fits with one side of the baffle.

[0011] As a preferred technical solution of the present invention, the top of the valve plate is conical, a sealing edge matching with a sealing ring is arranged on the top of the valve plate, and a spring is arranged between the bottom of the valve cover and the diaphragm pad.

[0012] As a preferred technical solution of the present invention, a top plate is fixedly provided at the bottom of the transmission rod, the top of the top plate is in contact with the bottom of the diaphragm pad, a threaded section is provided on the surface of the control rod, a pressure plate is movably mounted on the threaded section, a convex ring with its bottom embedded in the diaphragm pad is provided at the bottom of the pressure plate, a nut for tightening the pressure plate is also threadedly mounted on the threaded section, and the top of the transmission rod is connected to the nut seat by bolts.

[0013] As a preferred technical solution of the present invention, a circle of clamping ring is arranged on the top of the diaphragm pad, and the clamping ring is pressed between the valve cover and the valve body. The valve cover and the valve body are fixedly connected by a plurality of screws. A circle of supporting ring close to the bottom of the diaphragm pad is buried inside the diaphragm pad, and a plurality of support rods are arranged on the inner side of the support ring. The support rods are arranged at an angle, and a sliding sleeve is commonly arranged at one end of the plurality of support rods, and the interior of the sliding sleeve is movably sleeved with the surface of the transmission rod.

[0014] Compared with the prior art, the present invention provides a convenient backwashing three-way valve for a filter, which has the following beneficial effects: 1. The convenient backwash three-way valve used in the filter protects the diaphragm pad through the baffle during sewage discharge, preventing the diaphragm pad from being washed by sewage and damaging it, thus ensuring the service life of the diaphragm pad, reducing the replacement frequency, reducing the use cost, and meeting the needs of users. At the same time, the baffle can effectively reduce the deformation of the diaphragm pad, allowing sewage to quickly flow out of the valve body and reduce water consumption.

[0015] 2. The convenient backwash three-way valve used in the filter is equipped with a rack, a main gear, a pinion, a sub-gear and a rotating shaft, so that the motor drives the diaphragm pad to close. At the same time, the transmission rod automatically drives the control rod, the valve plate, the main gear, the pinion, the sub-gear and the rotating shaft to work in conjunction, so that the two baffles are deployed to protect the diaphragm pad. No additional power source is required to control the baffle, which is more energy-efficient.

[0016] 3. The filter uses a convenient backwash three-way valve. The transmission rod and the nut seat are connected by bolts, which will not affect the removal of the valve cover. The transmission rod is connected to the diaphragm pad through the top plate and the nut, which is convenient for the removal and replacement of the diaphragm pad. The structural design is ingenious, which is convenient for later maintenance, improves maintenance efficiency and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a convenient backwashing three-way valve for a filter proposed by the present invention; Figure 2 A structural side view of a convenient backwashing three-way valve for a filter proposed by the present invention; Figure 3 A cross-sectional view of the valve body structure of a convenient backwashing three-way valve for a filter proposed by the present invention; Figure 4 A cross-sectional view of the structure of a manifold seat of a convenient backwashing three-way valve for a filter proposed by the present invention; Figure 5 A cross-sectional view of the diaphragm pad structure of a convenient backwashing three-way valve for a filter proposed by the present invention; Figure 6 A cross-sectional view of the valve plate structure of a convenient backwashing three-way valve for a filter proposed by the present invention; Figure 7 A cross-sectional view of the shell structure of a convenient backwashing three-way valve for a filter proposed by the present invention; Figure 8 A schematic diagram of the baffle structure of a convenient backwash three-way valve for a filter proposed by the present invention; Fig. 9 A side cross-sectional view of a sleeve structure of a convenient backwashing three-way valve for a filter proposed by the present invention; Fig.10 A side cross-sectional view of a rubber sleeve structure of a convenient backwashing three-way valve for a filter proposed by the present invention; Fig.11 A schematic diagram of the folded state of a baffle of a convenient backwash three-way valve for a filter proposed by the present invention.

[0018] In the figure: 1, three-way valve body; 11, valve body; 12, valve cover; 13, diaphragm pad; 131, clamp ring; 132, support ring; 133, support rod; 134, sliding sleeve; 14, water inlet; 15, filter port; 16, sewage outlet; 161, sealing gasket 1; 162, blocking ring; 17, spring; 18, slide groove; 181, rack; 182, rubber sleeve; 19, collector seat; 191, sealing gasket 2; 2, control rod; 21, valve plate; 211, blocking edge; 22, transmission rod; 221, top plate; 2 22. Pressure plate; 223. Raised ring; 224. Nut; 225. Bolt; 23. Fixing rod; 231. Sliding hole; 232. Slide plate; 233. Ball; 234. Support frame; 24. Sleeve; 25. Rotating shaft; 251. Connecting block; 26. Baffle; 261. Air guide cover; 262. Rubber ring; 27. Pinion; 271. Main gear; 28. Sub gear; 29. ​​Transmission chain; 3. Drive assembly; 31. Housing; 32. Screw rod; 33. Motor; 34. Nut seat; 35. Silicone sealing cover. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-11 A convenient backwashing three-way valve for a filter comprises a three-way valve body 1, a control rod 2 is arranged inside the three-way valve body 1, and a driving component 3 for driving the control rod 2 is arranged on the top of the three-way valve body 1.

[0021] The three-way valve body 1 includes a valve body 11 and a valve cover 12 arranged on the top of the valve body 11, a water inlet 14 and a filter port 15 are respectively arranged at both ends of the valve body 11, a sewage outlet 16 is arranged at the bottom of the valve body 11 near the filter port 15, a diaphragm pad 13 is arranged at the bottom of the valve cover 12, and a current collecting seat 19 is arranged inside the valve body 11 at the positions of the water inlet 14 and the sewage outlet 16, the inner hole of the current collecting seat 19 is circular, and slide grooves 18 are arranged on both sides of the inner wall of the valve body 11.

[0022] The control rod 2 is located inside the collecting seat 19, one end of the control rod 2 extends to the inside of the sewage outlet 16 and is provided with a valve plate 21, the other end of the control rod 2 extends to the bottom of the diaphragm pad 13 and is provided with a transmission rod 22, the top end of the transmission rod 22 penetrates the diaphragm pad 13, the valve cover 12 and extends to the inside of the drive assembly 3.

[0023] A fixing rod 23 is fixedly provided inside the control rod 2, and two sleeves 24 are movably sleeved on the fixing rod 23 and are respectively located on both sides of the transmission rod 22. Both ends of the sleeve 24 are movably sleeved with the fixing rod 23 through sealed bearings, and a semicircular baffle 26 is provided on one side of the sleeve 24. The two baffles 26 are combined to form a circle, and one side of the two circular baffles 26 is fitted with one side of the collector seat 19 to shield the inner hole of the collector seat 19.

[0024] A rotating shaft 25 connected to the two sleeves 24 is movably provided inside the two ends of the fixed rod 23, and the two ends of the fixed rod 23 extend to the inside of the two slide grooves 18 respectively. A rack 181 is fixedly provided on one side of the inner wall of the slide groove 18. One end of the rotating shaft 25 extends to the inside of the slide groove 18 and is provided with a sub-gear 28 connected to the rack 181. Both ends of the rotating shaft 25 are movably sleeved with the inside of the fixed rod 23 through sealed bearings.

[0025] The driving assembly 3 includes a screw rod 32 and a motor 33 for driving the screw rod 32 . A nut seat 34 is movably sleeved on the screw rod 32 , and the top of the transmission rod 22 is sleeved with the inside of the nut seat 34 .

[0026] As a specific technical solution of this embodiment, two slide plates 232 are symmetrically arranged at both ends of the fixed rod 23. The slide plate 232 is movably embedded with at least one ball 233 at one end away from the fixed rod 23. The surface of the ball 233 is slidably connected to one side of the inner wall of the slide groove 18. Support frames 234 are fixedly arranged on the top of both ends of the fixed rod 23. The two slide plates 232 at the ends of the fixed rod 23 contact the inner walls of the two sides of the slide groove 18 through the ball 233. This design method is mainly to prevent the fixed rod 23 and the control rod 2 from rotating, thereby ensuring the stability of the fixed rod 23 and the control rod 2, so that the fixed rod 23, the control rod 2 and the transmission rod 2 can only move up and down. The setting of the ball 233 prevents the slide plate 232 from directly contacting the inner wall of the slide groove 18, reduces friction, and avoids the occurrence of jamming.

[0027] As a specific technical solution of this embodiment, a pinion 27 is provided on one side of the top of the support frame 234 through the rotation of the shaft, and a main gear 271 is provided on the side of the pinion 27 away from the support frame 234. The diameter of the main gear 271 is larger than that of the pinion 27, and the main gear 271 has the same diameter as the sub-gear 28. The main gear 271 and the pinion 27 are coaxially arranged, and the main gear 271 is meshed with the rack 181. The pinion 27 and the sub-gear 28 are connected by a transmission chain 29. The support frame 234 is provided to support the shaft to install the pinion 27 and the main gear 271. See Figure 3-4 As for 8-10, since the baffle plate 26 can be unfolded and stored by rotating only ninety degrees, the sub-gear 28 only needs to drive the rotating shaft 25 and the sleeve 24 to rotate within a range of ninety degrees. However, the rising distance of the diaphragm pad 13 is relatively large. In order to match the rising distance of the diaphragm pad 13 with the rotation angle of the sub-gear 28, a main gear 271 is provided. When the main gear 271 rotates one circle, the circumference of the main gear 271 matches the rising distance of the diaphragm pad 13. When the main gear 271 rotates one circle, the main gear 271 drives the pinion 27 to rotate one circle. The circumference of the pinion 27 is one quarter of the circumference of the sub-gear 28, so that when the pinion 27 rotates one circle, the sub-gear 28 is driven to rotate ninety degrees through the transmission chain 29, so that the sub-gear 28 drives the sleeve 24 and the baffle plate 26 to rotate ninety degrees through the rotating shaft 25 and the connecting block 251 to unfold or fold and store. The pinion 27 is fixedly connected to the main gear 271, so that the pinion 27 and the main gear 271 rotate synchronously. Figure 3-6Since the fixed rod 23 cannot rotate, when the transmission rod 22 drives the control rod 2 to rise, the control rod 2 drives the fixed rod 23 to rise, and the slides 232 at both ends of the fixed rod 23 cooperate with the fixed rod 23 to rise stably. The fixed rod 23 drives the shaft rod to rise through the support frame 234, and the shaft rod drives the pinion 27 and the main gear 271 to rise. Since the main gear 271 is engaged with the rack 181, the main gear 271 is engaged with the rack 181 during the rising process, and it rotates while rising, so that the main gear 271 drives the pinion 27 to rotate.

[0028] As a specific technical solution of this embodiment, a rubber sleeve 182 is provided on the inner wall of the valve body 11 and is located outside the slide groove 18. The interior of the rubber sleeve 182 is fixedly sleeved with the surface of the fixed rod 23. The surface of the fixed rod 23 is located inside the sleeve 24 and is provided with a slide hole 231. The end of the rotating shaft 25 away from the pinion 28 is provided with a connecting block 251. The end of the connecting block 251 away from the rotating shaft 25 passes through the slide hole 231 and is fixedly connected to the interior of the sleeve 24. The inner wall of the rubber sleeve 182 is fixedly sleeved with the surface of the fixed rod 23. The surface of the fixed rod 23 is located inside the sleeve 24 and is provided with a slide hole 231. The surface of the connecting block 251 is sleeved with the fixed rod 23 to achieve the sealing of the slide groove 18, and the rubber sleeve 182 is made of wear-resistant and corrosion-resistant rubber and has the characteristics of arbitrary stretching, which will not affect the up and down movement of the fixed rod 23. The movable angle of the connecting block 251 inside the sliding hole 231 is ninety degrees, which just corresponds to the folding and unfolding state of the baffle 26. The sub-gear 28 drives the connecting block 251 to rotate through the rotating shaft 25, and the connecting block 251 rotates inside the sliding hole 231. At the same time, the connecting block 251 drives the baffle 26 to rotate through the sleeve 24.

[0029] As a specific technical solution of this embodiment, a circular hole is formed inside the two baffles 26, which is sleeved with the surface of the control rod 2, and a rubber ring 262 is arranged inside the circular hole. The outer ring of the baffle 26 is provided with a guide cover 261, and the guide cover 261 is arc-shaped. When the two baffles 26 are combined into a circle, the inner hole of the collector 19 can be blocked to prevent sewage from contaminating the diaphragm pad 13 during the sewage discharge process. The setting of the rubber ring 262 ensures the sealing of the connection between the baffle 26 and the control rod 2, and further prevents sewage from contaminating the diaphragm pad 13. The rubber ring 262 is divided into two halves and installed inside the two baffles 26, which will not affect the movement of the two baffles 26. See Fig.11 The arrangement of the guide cover 261 can reduce the resistance of the outer surface of the baffle 26 to the water flow when the two baffles 26 are folded and the water flows from the water inlet 14 to the filter port 15, thereby ensuring the water delivery efficiency.

[0030] As a specific technical solution of this embodiment, the drive assembly 3 also includes a housing 31, the housing 31 is fixedly arranged on the top of the valve cover 12, the screw rod 32 and the motor 33 are both arranged inside the housing 31, and one side of the housing 31 is also provided with an opening and the internal movable sleeve of the opening is provided with a silicone sealing cover 35, see Figure 4 and 11 The output end of the motor 33 is connected to one end of the screw rod 32 through a toothed belt transmission. The motor 33 is started to drive the screw rod 32 to rotate, and the screw rod 32 drives the nut seat 34 thereon to move upward. The nut seat 34 lifts the transmission rod 22 up through the bolt 225, and the bolt 225 is screwed into the transmission rod 22 and the nut seat 34 from one side of the nut seat 34. When the bolt 225 needs to be removed to separate the nut seat 34 and the transmission rod 22, the silicone sealing cover 35 on one side of the shell 31 is opened to remove the bolt 225. After the bolt 225 is removed, it can be removed together with the shell 31 when the valve cover 12 is removed, so that the nut seat 34 is separated from the transmission rod 22, and the diaphragm pad 13 can be replaced.

[0031] As a specific technical solution of this embodiment, the sewage outlet 16 is in a conical shape with a small top diameter and a large bottom diameter. A circle of sealing gasket 161 and a sealing ring 162 located inside the sealing gasket 161 are arranged on the top of the inner wall of the sewage outlet 16. A sealing gasket 2 191 that fits with one side of the baffle 26 is arranged on one side of the collector seat 19. The top of the valve plate 21 is conical, and a circle of sealing edge 211 matching the sealing ring 162 is arranged on the top of the valve plate 21. A spring 17 is arranged between the bottom of the valve cover 12 and the diaphragm pad 13, see Figure 3 The conical design of the sewage outlet 16, together with the conical design of the valve plate 21, can effectively increase the sewage discharge space, ensure the sewage discharge efficiency, and avoid blockage. The setting of the sealing ring 162 can reduce the scouring of the inner ring of the sealing gasket 161 by sewage during sewage discharge, and increase the durability of the sealing gasket 161. The setting of the spring 17 ensures the sealing effect of the diaphragm pad 13 on the connection between the water inlet 14 and the filter port 15. The bottom of the sealing ring 162 is arc-shaped, and the sealing edge 211 is arc-shaped. When the valve plate 21 rises to block the filter port 15, the sealing edge 211 contacts the inner wall of the sealing ring 162, and at the same time, the valve plate 21 presses the sealing gasket 161. The sealing edge 211 cooperates with the sealing ring 162 to further increase the sealing effect of the filter port 15.

[0032] As a specific technical solution of this embodiment, a top plate 221 is fixedly provided at the bottom of the transmission rod 22, and the top of the top plate 221 fits with the bottom of the diaphragm pad 13. A threaded section is provided on the surface of the control rod 2, and a pressure plate 222 is movably sleeved on the threaded section. The bottom of the pressure plate 222 is also provided with a convex ring 223 embedded in the diaphragm pad 13, and a nut 224 for tightening the pressure plate 222 is also threadedly sleeved on the threaded section. The top of the transmission rod 22 is connected to the nut seat 34 by a bolt 225. When the valve cover 12 is disassembled and the diaphragm pad 13 needs to be replaced, the elastic The spring 17 is taken out, and then the nut 224 is turned to disconnect it from the transmission rod 22, and then the pressure plate 222 is removed, and the diaphragm pad 13 can be lifted and removed from the transmission rod 22. With this design, the transmission rod 22, the drive assembly 3 and other structures cooperate with the diaphragm pad 13 more cleverly, and will not affect the replacement of the diaphragm pad 13, and at the same time ensure the stability of the diaphragm pad 13. The setting of the convex ring 223 can tightly hold the middle of the diaphragm pad 13 and the fitting part of the transmission rod 22, so that the middle part of the diaphragm pad 13 will not be pressed outward by the nut 224, thereby ensuring the stability of the diaphragm pad 13.

[0033] As a specific technical solution of this embodiment, a circle of clamping ring 131 is arranged on the top of the diaphragm pad 13, and the clamping ring 131 is pressed between the valve cover 12 and the valve body 11. The valve cover 12 and the valve body 11 are fixedly connected by a plurality of screws. A circle of supporting ring 132 close to the bottom of the diaphragm pad 13 is buried inside the diaphragm pad 13, and a plurality of supporting rods 133 are arranged on the inner side of the supporting ring 132. The supporting rods 133 are arranged obliquely, and a sliding sleeve 134 is commonly arranged at one end of the plurality of supporting rods 133. The interior of the sliding sleeve 134 is movably connected to the surface of the transmission rod 22. After the valve stem and the valve body 11 are fixed by screws, the valve cover 12 cooperates with the valve body 11 to tighten the clamping ring 131, thereby ensuring the sealing between the diaphragm pad 13 and the valve body 11 and the valve cover 12. The provision of the support ring 132 ensures the overall stability of the diaphragm pad 13, making the bottom of the diaphragm pad 13 smoother, the sealing effect better, and the use more durable. The support rod 133 cooperates with the sliding sleeve 134 to ensure the stability of the relative position of the diaphragm pad 13 and the transmission rod 22.

[0034] When in use, connect the water inlet 14 to the water source to be filtered, connect the filter port 15 to the filter, and connect the sewage outlet 16 to the sewage pipe. Fig.11When the filter is not discharging sewage, the starting motor 33 drives the screw rod 32 to rotate, and the screw rod 32 drives the nut seat 34 to rise and lift the transmission rod 22, the control rod 2 and the valve plate 21. The valve plate 21 blocks the filter port 15, and the fixing rod 23 drives the shaft rod to rise through the support frame 234, and the shaft rod drives the pinion gear 27 and the main gear 271 to rise. Since the main gear 271 is meshed with the rack 181, the main gear 271 meshes with the rack 181 during the rising process, and the main gear 271 is raised and rotates while rising. When the main gear 271 rotates one circle, the main gear 271 drives the pinion gear 27 to rotate one circle. The circumference of the pinion gear 27 is one quarter of the circumference of the sub-gear 28, so that when the pinion gear 27 rotates one circle, the sub-gear 28 is driven to rotate ninety degrees through the transmission chain 29, so that the sub-gear 28 drives the sleeve 24 and the baffle 26 to rotate ninety degrees through the rotating shaft 25 and the connecting block 251, so that the water at the water inlet 14 can flow to the filter port 15. Figure 3 When the filter needs to discharge sewage, the motor 33 is started to drive the screw rod 32 to flip, so that the screw rod 32 drives the nut seat 34 to descend, and the fixing rod 23 drives the shaft rod to descend, so that the main gear 271 descends and rotates one circle, so that the rotating shaft 25 drives the baffle 26 that was originally folded to flip 90 degrees and unfold again, so that the two baffles 26 are combined into a circle and contact the sealing gasket 2 191 on one side of the collecting seat 19, so that the sewage can be blocked during the sewage discharge operation, thereby preventing the sewage from scouring the diaphragm pad 13 and damaging the diaphragm pad 13, thereby ensuring the service life of the diaphragm pad 13.

[0035] To sum up, the convenient backwash three-way valve used in the filter protects the diaphragm pad 13 through the baffle 26 during sewage discharge operations, thereby preventing sewage from scouring the diaphragm pad 13 and preventing damage to the diaphragm pad 13, thereby ensuring the service life of the diaphragm pad 13, reducing the replacement frequency, reducing the cost of use, and meeting user needs.

[0036] The convenient backwash three-way valve used in the filter is provided with a rack 181, a main gear 271, a pinion 27, a sub-gear 28 and a rotating shaft 25, so that the motor 33 drives the diaphragm pad 13 to close. At the same time, the transmission rod 22 automatically drives the control rod 2, the valve plate 21, the main gear 271, the pinion 27, the sub-gear 28 and the rotating shaft 25 to realize the deployment of the two baffles 26 to protect the diaphragm pad 13. No additional power source is required to control the baffle 26, which is more energy-efficient.

[0037] The filter uses a convenient backwash three-way valve, and the design in which the transmission rod 22 and the nut seat 34 are connected by bolts 225 will not affect the disassembly of the valve cover 12. The transmission rod 22 is connected to the diaphragm pad 13 through the top plate 221 and the nut 224, which facilitates the disassembly and replacement of the diaphragm pad 13. The structural design is ingenious, which is convenient for later maintenance, improves maintenance efficiency, and reduces maintenance costs.

[0038] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A convenient backwashing three-way valve for a filter, comprising a three-way valve body (1), characterized in that: A control rod (2) is arranged inside the three-way valve body (1), and a driving component (3) for driving the control rod (2) is arranged on the top of the three-way valve body (1); The three-way valve body (1) comprises a valve body (11) and a valve cover (12) arranged on the top of the valve body (11); a water inlet (14) and a filter port (15) are respectively arranged at two ends of the valve body (11); a sewage outlet (16) is arranged at the bottom of the valve body (11) near the filter port (15); a diaphragm pad (13) is arranged at the bottom of the valve cover (12); a current collecting seat (19) is arranged inside the valve body (11) at the positions of the water inlet (14) and the sewage outlet (16); the inner hole of the current collecting seat (19) is circular; and slide grooves (18) are arranged on both sides of the inner wall of the valve body (11); The control rod (2) is located inside the manifold seat (19), one end of the control rod (2) extends to the inside of the sewage outlet (16) and is provided with a valve plate (21), the other end of the control rod (2) extends to the bottom of the diaphragm pad (13) and is provided with a transmission rod (22), the top end of the transmission rod (22) penetrates the diaphragm pad (13) and the valve cover (12) and extends to the inside of the drive assembly (3); A fixing rod (23) is fixedly arranged inside the control rod (2), and two sleeves (24) are movably sleeved on the fixing rod (23) and are respectively located on both sides of the transmission rod (22), and a semicircular baffle (26) is arranged on one side of the sleeve (24), and the two baffles (26) are combined to form a circle, and one side of the two baffles (26) combined to form a circle is fitted with one side of the current collecting seat (19) to achieve shielding of the inner hole of the current collecting seat (19); Rotating shafts (25) which are transmission-connected to the two sleeves (24) are movably disposed inside the two ends of the fixed rod (23), respectively. The two ends of the fixed rod (23) extend into the two slide grooves (18), respectively. A rack (181) is fixedly disposed on one side of the inner wall of the slide groove (18), and one end of the rotating shaft (25) extends into the slide groove (18) and is provided with a sub-gear (28) which is transmission-connected to the rack (181). The driving assembly (3) comprises a screw rod (32) and a motor (33) for driving the screw rod (32); a nut seat (34) is movably sleeved on the screw rod (32); and the top of the transmission rod (22) is sleeved with the inside of the nut seat (34).

2. The convenient backwashing three-way valve for a filter according to claim 1, characterized in that: Two slide plates (232) are symmetrically arranged at both ends of the fixing rod (23), and at least one ball (233) is movably embedded in one end of the slide plate (232) away from the fixing rod (23), and the surface of the ball (233) is slidably connected to one side of the inner wall of the slide groove (18), and support frames (234) are fixedly arranged at the top of both ends of the fixing rod (23).

3. The convenient backwashing three-way valve for a filter according to claim 2, characterized in that: A pinion gear (27) is rotatably arranged on one side of the top of the support frame (234) via a shaft, a main gear (271) is arranged on a side of the pinion gear (27) away from the support frame (234), the diameter of the main gear (271) is larger than that of the pinion gear (27), the main gear (271) and the pinion gear (28) have the same diameter, the main gear (271) and the pinion gear (27) are coaxially arranged, the main gear (271) is meshed with a rack (181), and the pinion gear (27) and the pinion gear (28) are connected in transmission via a transmission chain (29).

4. The convenient backwashing three-way valve for a filter according to claim 3, characterized in that: A rubber sleeve (182) is provided on the inner wall of the valve body (11) and is located outside the slide groove (18); the interior of the rubber sleeve (182) is fixedly sleeved with the surface of the fixing rod (23); a sliding hole (231) is provided on the surface of the fixing rod (23) at an inner position of the sleeve (24); a connecting block (251) is provided at one end of the rotating shaft (25) away from the pinion gear (28); and the end of the connecting block (251) away from the rotating shaft (25) passes through the sliding hole (231) and is fixedly connected to the interior of the sleeve (24).

5. The convenient backwashing three-way valve for a filter according to claim 1, characterized in that: A circular hole is formed inside the two baffles (26) and is sleeved with the surface of the control rod (2). A rubber ring (262) is arranged inside the circular hole. A flow guide cover (261) is arranged on the outer ring of the baffle (26). The flow guide cover (261) is arc-shaped.

6. The convenient backwashing three-way valve for a filter according to claim 1, characterized in that: The drive assembly (3) further comprises a housing (31), wherein the housing (31) is fixedly arranged on the top of the valve cover (12), the screw rod (32) and the motor (33) are both arranged inside the housing (31), and an opening is also arranged on one side of the housing (31), and a silicone sealing cover (35) is arranged inside the movable sleeve of the opening.

7. The convenient backwashing three-way valve for a filter according to claim 1, characterized in that: The sewage outlet (16) is in the shape of a cone with a small diameter at the top and a large diameter at the bottom. A circle of sealing gasket 1 (161) and a sealing ring (162) located inside the sealing gasket 1 (161) are provided at the top of the inner wall of the sewage outlet (16). A sealing gasket 2 (191) is provided on one side of the current collecting seat (19) and is in contact with one side of the baffle (26).

8. The convenient backwashing three-way valve for a filter according to claim 7, characterized in that: The top of the valve plate (21) is conical, and a sealing edge (211) matching the sealing ring (162) is provided on the top of the valve plate (21). A spring (17) is provided between the bottom of the valve cover (12) and the diaphragm pad (13).

9. The convenient backwashing three-way valve for a filter according to claim 1, characterized in that: A top plate (221) is fixedly provided at the bottom of the transmission rod (22), and the top of the top plate (221) is in contact with the bottom of the diaphragm pad (13). A threaded section is provided on the surface of the control rod (2), and a pressure plate (222) is movably sleeved on the threaded section. A convex ring (223) is also provided at the bottom of the pressure plate (222), and the bottom is embedded in the interior of the diaphragm pad (13). A nut (224) for pressing the pressure plate (222) is also threadedly sleeved on the threaded section. The top of the transmission rod (22) is connected to the nut seat (34) via a bolt (225).

10. The convenient backwashing three-way valve for a filter according to claim 1, characterized in that: A circle of clamping ring (131) is arranged on the top of the diaphragm pad (13), and the clamping ring (131) is pressed between the valve cover (12) and the valve body (11). The valve cover (12) and the valve body (11) are fixedly connected by a plurality of screws. A circle of supporting ring (132) close to the bottom of the diaphragm pad (13) is buried inside the diaphragm pad (13), and a plurality of supporting rods (133) are arranged on the inner side of the supporting ring (132). The supporting rods (133) are arranged in an inclined manner, and a sliding sleeve (134) is commonly arranged at one end of the plurality of supporting rods (133), and the interior of the sliding sleeve (134) is movably sleeved with the surface of the transmission rod (22).

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