CN116531812A - H-shaped automatic back flushing filtering device - Google Patents

Abstract

The invention relates to the technical field of filters, in particular to an H-shaped automatic back flushing filter device. Including inlet tube, outlet pipe, blow off pipe and a plurality of lamination formula filter, lamination formula filter includes casing, filter core, filter pulp and gland, lamination formula filter bottom sets up H type diverter valve, H type diverter valve includes the first valve of axis parallel, second valve and third valve, H type diverter valve still includes first regulation case and second regulation case, first regulation case synchronous control first valve and second valve present opposite open and shut state, second regulation case coaxial arrangement is in the third valve, second regulation case cooperation two tee bend valves control the liquid flow direction in the third valve. According to the technical scheme, the second regulating valve core and the first regulating valve core can be started simultaneously and automatically switch the circulation states of the sewage water inlet and the sewage water outlet, so that participation of electric elements is greatly reduced, production cost is reduced, and accuracy is guaranteed.

Description

H-shaped automatic back flushing filtering device

Technical Field

The invention relates to the technical field of filters, in particular to an H-shaped automatic back flushing filter device.

Background

The filter is very common liquid pretreatment equipment and is widely applied to agriculture, food, industry and engineering, wherein the laminated filter is one of the liquid pretreatment equipment and is mainly used for filtering large-particle impurities in water, so that cleaner water is obtained. The prior lamination type filter has the advantages of simple structure, convenient use, low cost and the like, and is a filter with the most wide application range at present.

The existing tile-type back flush filter is characterized in that a sewage water inlet, a sewage water outlet, a purified water outlet and a valve for controlling purified water to flow back into the filter are all electromagnetic valves, the structure is complex, the number of electrical elements is large, the accuracy requirement is high, the cost is high, the filter is composed of a plurality of filter sheets which are overlapped together, a circle of annular distributed radial filter groove channels are arranged on the upper surface and the lower surface of each filter cotton, after the filter cotton is overlapped with each other, if the filter groove channels on two adjacent filter cotton cannot be meshed with each other, the filter holes are too small, and the water passing rate is greatly reduced.

Disclosure of Invention

In view of the foregoing, it is desirable to provide an H-type automatic backwash filter device that addresses the problems of the prior art.

In order to solve the problems in the prior art, the invention adopts the following technical scheme:

an H-shaped automatic back flushing filter device comprises a water inlet pipe, a water outlet pipe, a sewage drain pipe and a plurality of laminated filters, wherein each laminated filter comprises a shell and a filter element coaxially arranged in the shell, a water purifying outlet is formed in the bottom of each filter element, a plurality of filter cottons are stacked on the outer side of each filter element, a gland is elastically arranged at the top of each shell, downward elasticity of each filter cottons is applied to each gland, and a sewage inlet and a sewage outlet are formed in the bottom of each shell; the bottom of each lamination type filter is provided with an H-shaped switching valve, and the H-shaped switching valve comprises a first valve, a second valve and a third valve which are parallel to each other in axis; the first valve is communicated with the sewage inlet and the water inlet pipe, the second valve is communicated with the sewage outlet and the sewage discharge pipe, the third valve is communicated with the purified water outlet and the water outlet pipe, and a two-position three-way valve is arranged between the third valve and the water outlet pipe; the H-shaped switching valve further comprises a first adjusting valve core and a second adjusting valve core, the first adjusting valve core synchronously controls the first valve and the second valve to be in opposite opening and closing states, the second adjusting valve core is coaxially arranged in the third valve, and the second adjusting valve core is matched with the two-position three-way valve to control the flowing direction of liquid in the third valve.

Preferably, the first valve and the second valve have the same structure, an upper runner and a lower runner are arranged in the first valve, one ends of the upper runner and the lower runner are communicated with an inner cavity of a valve cover arranged on one side of the first valve, and the valve covers of the first valve and the second valve are arranged oppositely; the two ends of the first regulating valve core are provided with plugging valve cores with the same cross-sectional shape as the inner cavity of the valve cover, and the plugging valve cores are slidably arranged in the inner cavity of the valve cover and move along the horizontal direction perpendicular to the axis of the first valve.

Preferably, the plugging valve core is provided with a horizontal guide rod, the guide rod is inserted into a guide hole arranged on the valve cover and extends to the outside of the valve cover, the guide rods on the first valve and the second valve are respectively connected with two ends of the connecting ring, and the third valve is positioned in the connecting ring.

Preferably, an upper limit ring and a lower limit ring surrounding the inner wall are arranged in the third valve, the second regulating valve core is slidably arranged between the upper limit ring and the lower limit ring, the outer wall of the second regulating valve core is attached to the inner wall of the third valve, and an inner channel is coaxially arranged in the second regulating valve core; the top end of the inner channel is hinged with a unidirectional valve plate which is turned downwards in a unidirectional way; and one side of the third valve is provided with a backflow channel, the bottom end of the backflow channel is communicated to the upper side of the lower limiting ring, the top end of the backflow channel is communicated to the upper side of the upper limiting ring, and the length of the second regulating valve core is smaller than the difference between the linear distance between the upper limiting ring and the lower limiting ring and the inner diameter of the backflow channel.

Preferably, the cross section of the inner channel is rectangular, and the inner channel is blocked after the one-way valve plates are horizontally spliced.

Preferably, the elastic sheet is arranged on the lower side of the one-way valve plate, and the elastic sheet applies the upward overturning elasticity of the one-way valve plate; and the two sides of the top end of the inner channel of the second regulating valve core are provided with check blocks, and when the check valve plate is horizontal, the bottoms of the check blocks are attached to the upper side of the check valve plate.

Preferably, a limiting rod extending horizontally along the radial direction is arranged on the outer side of the second regulating valve core, the limiting rod is slidably arranged in a first waist-shaped hole arranged on the peripheral side of the third valve, and the first waist-shaped hole extends vertically along the axis direction of the third valve; the limiting rod is connected with the extension plate, and two ends of the extension plate are provided with horizontally extending ejector rods; the rotary drum is rotatably arranged on two sides of the outer part of the third valve, a spiral limit groove is formed in the peripheral side of the rotary drum, and the top end of the ejector rod is limited and inserted in the spiral limit groove; the bottom of the rotary drum is provided with a connecting arm which extends horizontally, and the connecting arm is provided with a second waist-shaped hole which extends along the length direction of the connecting arm; the two sides of the connecting ring of the first regulating valve core are provided with vertical upward straight rods which are slidably arranged in the second waist-shaped holes.

Preferably, a piston rod is arranged at the top of the gland of the laminated filter, the piston rod vertically extends to the outer side of the shell, and a spring sleeved on the piston rod is elastically connected with the gland and the top of the shell; and a connecting plate is fixedly arranged on the extension plate of the second regulating valve core, extends vertically upwards and is fixedly connected with the top end of the piston rod, and the second regulating valve core moves upwards to drive the gland to move upwards.

Preferably, the inner side of the filter cotton is provided with a lantern ring, the upper side of the lantern ring is provided with a plurality of positioning grooves, and the positioning grooves are arranged at equal intervals around the axis of the lantern ring; the downside of the lantern ring is provided with positioning teeth with the same number and positions as the positioning grooves, and the grooves on the filter cotton are aligned when the positioning teeth are inserted in the positioning grooves.

Preferably, the upper side of the lantern ring is provided with an arc-shaped flow guide strip, and two ends of the arc-shaped flow guide strip are respectively attached to the outer sides of two adjacent positioning grooves; the upper side surface of the arc-shaped flow guide strip is flush with the upper surfaces of the two sides of the positioning groove, and the upper surface of the arc-shaped flow guide strip is lower than the upper surface of the filter cotton.

Compared with the prior art, the invention has the beneficial effects that:

the first valve, the second valve and the third valve of the H-shaped switching valve are controlled by the first regulating valve core and the second regulating valve core, the first regulating valve core and the second regulating valve core are driven by a mechanical principle, and when the flow direction of purified water is changed, the second regulating valve core and the first regulating valve core are simultaneously started and automatically switch the circulation states of the sewage water inlet and the sewage water outlet, so that the participation of electric elements is greatly reduced, the production cost is reduced, and the accuracy is ensured.

Secondly, the gland in the invention ensures the compression of the filter cotton through the elasticity of the spring, the piston rod on the upper side of the gland penetrates through the shell and extends to the outside to be connected with the connecting plate, and the second regulating valve core moves upwards to drive the connecting plate arranged on the extension plate to move upwards in the back flushing process, so that the gland is automatically driven to move upwards and compress the spring, the pressure on the filter cotton is reduced, the interval between the filter cotton is easier to be increased, and the back flushing effect is improved.

Thirdly, when the filter cotton positioned at the upper layer is inserted into the positioning groove on the filter cotton positioned at the lower side through the positioning teeth at the bottom of the lantern ring, the grooves on the filter cotton are aligned, the structure completion of the filter holes and the water passing rate are ensured, and when the water flow moves along the arc-shaped guide strips between the positioning grooves in the back flushing process, the positioning teeth are pushed to rotate the filter cotton, so that impurities are easier to separate from the filter cotton through centrifugal force.

Drawings

FIG. 1 is a top view of an H-type automatic backwash filter device;

FIG. 2 is a side view of an H-type automatic backwash filter device;

FIG. 3 is a perspective view of a laminated filter and H-switch valve of an H-type automatic backwash filter assembly in a filter configuration;

FIG. 4 is a front view of a laminated filter and H-switch valve of an H-type automatic backwash filter assembly in a filter configuration;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 4;

FIG. 6 is an enlarged view of a portion at B of FIG. 5;

FIG. 7 is a perspective view of a laminated filter and H-switch valve of an H-type automatic backwash filter assembly in a backwash state;

FIG. 8 is an enlarged view of a portion of FIG. 7 at C;

FIG. 9 is a front view of a laminated filter and H-switch valve of an H-type automatic backwash filter assembly in a backwash state;

FIG. 10 is a cross-sectional view taken at D-D of FIG. 9;

FIG. 11 is an enlarged view of a portion of FIG. 10 at E;

FIG. 12 is a perspective view of a filter element of an H-type automatic backwash filter device;

fig. 13 is a perspective view of a filter element of an H-type automatic backwash filter device.

The reference numerals in the figures are: 1. a water inlet pipe; 11. a water outlet pipe; 12. a blow-down pipe; 13. a two-position three-way valve; 2. a laminated filter; 21. a housing; 211. a sewage inlet; 212. a sewage outlet; 22. a filter element; 221. a purified water outlet; 23. filtering cotton; 231. a collar; 232. a positioning groove; 233. positioning teeth; 234. arc-shaped guide strips; 24. a gland; 241. a piston rod; 242. a spring; 3. a switching valve; 31. a first valve; 311. an upper flow passage; 312. a lower flow passage; 313. a valve cover; 314. a guide hole; 32. a second valve; 33. a third valve; 331. an upper limit ring; 332. a lower limit ring; 333. a return passage; 334. a first waist-shaped hole; 335. a rotating drum; 336. a spiral limit groove; 337. a connecting arm; 338. a second waist-shaped hole; 34. a first regulating valve core; 341. plugging the valve core; 342. a guide rod; 343. a connecting ring; 344. a straight rod; 35. a second regulating valve core; 351. an inner channel; 352. a one-way valve plate; 353. an elastic sheet; 354. a stop block; 355. a limit rod; 356. an extension plate; 357. a push rod; 358. and (5) connecting a plate.

Description of the embodiments

The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.

Referring to fig. 1 to 13:

an H-shaped automatic back flushing filtering device comprises a water inlet pipe 1, a water outlet pipe 11, a blow-off pipe 12 and a plurality of laminated filters 2, wherein each laminated filter 2 comprises a shell 21 and a filter element 22 coaxially arranged in the shell 21, a purified water outlet 221 is formed in the bottom of each filter element 22, a plurality of filter cotton 23 are stacked on the outer side of each filter element 22, a gland 24 is elastically arranged at the top of the shell 21, downward elasticity of each filter cotton 23 is exerted by each gland 24, and a sewage water inlet 211 and a sewage water outlet 212 are formed in the bottom of the shell 21; the bottom of each lamination type filter 2 is provided with an H-shaped switching valve 3, and the H-shaped switching valve 3 comprises a first valve 31, a second valve 32 and a third valve 33 which are parallel in axis; the first valve 31 is communicated with the sewage inlet 211 and the water inlet pipe 1, the second valve 32 is communicated with the sewage outlet 212 and the sewage discharge pipe 12, the third valve 33 is communicated with the purified water outlet 221 and the water outlet pipe 11, and a two-position three-way valve 13 is further arranged between the third valve 33 and the water outlet pipe 11; the H-type switching valve 3 further comprises a first regulating valve core 34 and a second regulating valve core 35, the first regulating valve core 34 synchronously controls the first valve 31 and the second valve 32 to be in opposite opening and closing states, the second regulating valve core 35 is coaxially arranged in the third valve 33, and the second regulating valve core 35 is matched with the two-position three-way valve 13 to control the flow direction of liquid in the third valve 33.

The water inlet pipe 1, the water outlet pipe 11, the sewage draining pipe 12 and the two-position three-way valve 13 in the application are all in the prior art, and are not described in detail herein, the laminated filter 2 can be multiple, five in the embodiment, the specific number can be set according to actual requirements, sewage is conveyed through the water outlet pipe 11, when the sewage is in a filtering state, the first valve 31 is controlled to be opened by the first regulating valve core 34 of the H-shaped switching valve 3, the second valve 32 is closed, at the moment, the sewage enters the first valve 31 through the water outlet pipe 11, enters the shell 21 through the first valve 31 along the sewage water inlet 211 of the laminated filter 2, clean water is discharged through the filter core 22 along the clean water outlet 221 after being filtered through the filter holes formed by the grooves on the filter cotton 23 stacked together, at the moment, the two-position three-way valve 13 at the bottom of the clean water outlet 221 keeps the communication between the clean water outlet 221 and the water outlet pipe 11, and the clean water is discharged through the water outlet pipe 11; the two-position three-way valve 13 can be connected with monitoring devices such as a water pressure gauge or a water level monitor through signals, when impurities in sewage plug a plurality of filter holes among the filter cotton 23, the water level and the pressure in the shell 21 are raised and are detected by the water level monitor or the water pressure gauge, the signals are sent to the two-position three-way valve 13, the two-position three-way valve 13 cuts off the communication between the purified water outlet 221 and the water outlet pipe 11, the purified water filtered by other laminated filters 2 is reversely conveyed into the laminated filters 2, at the moment, the first regulating valve core 34 plugs the first valve 31 to prevent the sewage from entering the laminated filters 2, the second valve 32 is opened, the laminated filters 2 enter a back flushing working state, reversely flowing purified water is matched with the second regulating valve core 35 to enter the filter core 22 to flush out the impurities in the filter holes of the filter cotton 23, the sewage with the impurities is discharged into the sewage discharge pipe 12 through the second valve 32 and 222, the time of single starting can be set, so that the time of back flushing is controlled, the laminated filters 2 are restored after the back flushing is finished, and the H-shaped switching valve 3 is reset again to repeat the filtering effect. The first valve 31, the second valve 32 and the third valve 33 of the H-shaped switching valve 3 in this embodiment are controlled by the first adjusting valve core 34 and the second adjusting valve core 35, and the first adjusting valve core 34 and the second adjusting valve core 35 are driven by a mechanical principle, so that participation of electrical elements is greatly reduced, production cost is reduced, and accuracy is ensured.

In order to achieve the purpose that the first valve element 34 can control the first valve 31 and the second valve 32 to maintain opposite opening and closing states, the following features are specifically provided:

the first valve 31 and the second valve 32 have the same structure, an upper flow channel 311 and a lower flow channel 312 are arranged in the first valve 31, one ends of the upper flow channel 311 and the lower flow channel 312 are communicated with an inner cavity of a valve cover 313 arranged at one side of the first valve 31, and the valve covers 313 of the first valve 31 and the second valve 32 are oppositely arranged; the two ends of the first adjusting valve core 34 are provided with plugging valve cores 341 with the same cross-sectional shape as the inner cavity of the valve cover 313, and the plugging valve cores 341 are slidably mounted in the inner cavity of the valve cover 313 to move along the horizontal direction perpendicular to the axis of the first valve 31.

The plugging valve core 341 is provided with a horizontal guide rod 342, the guide rod 342 is inserted into a guide hole 314 provided on the valve cover 313 to extend to the outside of the valve cover 313, the guide rods 342 on the first valve 31 and the second valve 32 are respectively connected with two ends of a connecting ring 343, and the third valve 33 is positioned inside the connecting ring 343.

In this embodiment, the first valve 31 and the second valve 32 adopt the same structure, when the upper flow channel 311 and the lower flow channel 312 in the first valve 31 and the second valve 32 are opened when one end of the valve cover 313 is released by the plugging valve core 341, sewage can pass through the first valve 31 and the second valve 32, the plugging valve cores 341 in the valve covers 313 of the first valve 31 and the second valve 32 are connected through the guide rod 342 and the connecting ring 343, and the synchronous movement of the two plugging valve cores 341 is kept, in the back flushing process, the first regulating valve core 34 moves to enable the plugging valve core 341 in the first valve 31 to be attached to one end of the upper flow channel 311 and one end of the lower flow channel 312, the first valve 31 is plugged, at this time, the plugging valve core 341 in the second valve 32 is attached to the top end of the valve cover 313, and the inner cavity of the valve cover 313 of the second valve 32 is kept communicated with the upper flow channel 311 and the lower flow channel 312, so that sewage with impurities can be conveniently discharged out of the laminated filter 2; in the filtering process, when the first regulating valve core 34 moves to enable the plugging valve core 341 in the second valve 32 to be attached to one end of the upper flow channel 311 and one end of the lower flow channel 312, the second valve 32 is plugged, at the moment, the plugging valve core 341 in the first valve 31 is attached to the top end of the valve cover 313, and the inner cavity of the valve cover 313 of the first valve 31 is communicated with the upper flow channel 311 and the lower flow channel 312, so that sewage with impurities can conveniently enter the laminated filter 2 for filtering; the plugging valve core 341 in this embodiment may be an elastic diaphragm or a rubber sealing sheet, the peripheral side of the plugging valve core 341 is attached to the inner wall of the valve cover 313, so as to maintain air tightness, the guide rods 342 on the two first adjusting valve cores 34 keep the same axis, the guide rods 342 are inserted into the guide holes 314 of the valve cover 313 to ensure that the plugging valve core 341 moves along the radial direction of the first valve 31 and the second valve 32 inside the valve cover 313, the guide rods 342 are connected through the connecting ring 343, and the connecting ring 343 facilitates the avoidance of the third valve 33 when the first adjusting valve core 34 moves.

In order to achieve the purpose that the second regulating valve core 35 can pass the clean water through the third valve 33 in different directions during the filtering and back flushing processes, the following features are specifically provided:

an upper limiting ring 331 and a lower limiting ring 332 surrounding the inner wall are arranged in the third valve 33, the second regulating valve core 35 is slidably arranged between the upper limiting ring 331 and the lower limiting ring 332, the outer wall of the second regulating valve core 35 is attached to the inner wall of the third valve 33, and an inner channel 351 is coaxially arranged in the second regulating valve core 35; the top end of the inner channel 351 is hinged with a unidirectional valve plate 352 which is turned downwards in a unidirectional way; the third valve 33 is provided with a return passage 333 on one side, the bottom end of the return passage 333 is connected to the upper side of the lower limiting ring 332, the top end of the return passage 333 is connected to the upper side of the upper limiting ring 331, and the length of the second regulating valve core 35 is smaller than the difference between the linear distance between the upper limiting ring 331 and the lower limiting ring 332 and the inner diameter of the return passage 333.

The cross section of the inner channel 351 is rectangular, and the check valve plate 352 is horizontally spliced to seal the inner channel 351.

The elastic piece 353 is arranged at the lower side of the one-way valve plate 352, and the elastic piece 353 applies the upward overturning elastic force to the one-way valve plate 352; the stopper 354 is provided on both sides of the top end of the inner passage 351 of the second regulating valve core 35, and when the check valve plate 352 is horizontal, the bottom of the stopper 354 is attached to the upper side of the check valve plate 352.

The second adjusting valve core 35 in this embodiment is slidably installed between the upper limit ring 331 and the lower limit ring 332 in the third valve 33, during the filtration process, purified water flows from the purified water outlet 221 to the lower third valve 33, the second adjusting valve core 35 keeps the bottom attached to the lower limit ring 332 under the action of water flow impact and gravity, at this time, the bottom end of the backflow channel 333 at one side of the third valve 33 is blocked by the second adjusting valve core 35, the impact of water flow causes the unidirectional valve plate 352 of the second adjusting valve core 35 to compress the elastic sheet 353 downwards, and the inner channel 351 blocked by the unidirectional valve plate 352 is opened, so that water flow enters the water outlet pipe 11 below; when the back flushing process is carried out, the two-position three-way valve 13 enables purified water to flow back into the filter element 22 from bottom to top, at the moment, the one-way valve plate 352 is reset to a horizontal state under the action of water flow impact and the elasticity of the elastic sheet 353, the upper side joint stop 354 of the one-way valve plate 352 keeps blocking the top of the inner channel 351, the impact of water flow drives the second regulating valve core 35 to move upwards along the axis of the third valve 33 to the bottom of the joint upper limiting ring 331, and as the length of the second regulating valve core 35 is smaller than the difference between the linear distance between the upper limiting ring 331 and the lower limiting ring 332 and the inner diameter of the return channel 333, when the top of the second regulating valve core 35 is jointed with the bottom of the upper limiting ring 331, the bottom opening of the return channel 333 is completely released, and water flow enters the third valve 33 through the return channel 333 and flows into the filter element 22 to carry out back flushing on the filter cotton 23; in this embodiment, the cross section of the inner channel 351 is rectangular, so that the check valve plate 352 can be spliced to complete the blocking of the inner channel 351, the overturning effect of the check valve plate 352 is guaranteed, and the elastic piece 353 and the stop block 354 cooperate to ensure that the check valve plate 352 can overturn to release the inner channel 351 and also can keep the blocking of the inner channel 351.

In order to solve the problem of how to realize the synchronous change of the working states of the first valve 31, the second valve 32 and the third valve 33 by the first regulating valve core 34 and the second regulating valve core 35, the following features are specifically provided:

a limiting rod 355 extending horizontally along the radial direction is arranged on the outer side of the second regulating valve core 35, the limiting rod 355 is slidably arranged in a first waist-shaped hole 334 arranged on the periphery side of the third valve 33, and the first waist-shaped hole 334 extends vertically along the axial direction of the third valve 33; the limiting rod 355 is connected with the extension plate 356, and two ends of the extension plate 356 are provided with horizontally extending ejector rods 357; the rotary drum 335 is rotatably installed on two sides of the outer part of the third valve 33, a spiral limit groove 336 is formed in the periphery of the rotary drum 335, and the top end of the ejector rod 357 is limited and inserted in the spiral limit groove 336; the bottom of the rotary drum 335 is provided with a connecting arm 337 extending horizontally, and the connecting arm 337 is provided with a second waist-shaped hole 338 extending along the length direction of the connecting arm 337; two sides of the connecting ring 343 of the first adjusting valve core 34 are provided with vertical upward straight rods 344, and the straight rods 344 are slidably mounted in the second waist-shaped holes 338.

In this embodiment, the limiting rod 355 disposed on the second regulating valve core 35 is moved in the first waist-shaped hole 334 of the third valve 33 in a limiting manner, the first waist-shaped hole 334 is blocked by the second regulating valve core 35 to avoid water leakage, in the filtration process, the limiting rod 355 is located at the lowest end of the first waist-shaped hole 334, when the two-position three-way valve 13 returns purified water to the laminated filter 2, the second regulating valve core 35 moves up to drive the limiting rod 355 to move up in the first waist-shaped hole 334, the limiting rod 355 synchronously drives the extension plate 356 to move up, and when the horizontal ejector rods 357 disposed at two ends of the extension plate 356 move up, as the ejector rods 357 are inserted into the spiral limiting grooves 336 at the periphery of the outer wall of the rotary drum 335, the rotary drum 335 is driven to rotate by the ejector rods 357, so that the connecting arm 337 at the bottom of the rotary drum 335 drives the straight rod 344 inserted into the second waist-shaped hole 338 to move horizontally to one side, thereby realizing the synchronous movement of the blocking plugs 341 at two ends of the first regulating valve core 34, changing the first valve core 31 from open to closed, the second valve core 32 from closed to open, and the sewage flowing through the first regulating valve core 34 and the sewage flow through the transmission structure, and the sewage flow efficiency of the first regulating valve core 34 is changed to be higher than that the sewage flowing through the first regulating valve core 34 and the first regulating valve core 35 and the sewage valve core 212 is changed to be automatically opened and the sewage regulating valve core 212.

In order to solve the problem that impurities between the filter cottons 23 stacked below are difficult to be discharged only by changing the interval of the filter cottons 23 by water pressure, the following features are specifically provided:

a piston rod 241 is arranged at the top of the gland 24 of the laminated filter 2, the piston rod 241 vertically extends to the outer side of the shell 21, and a spring 242 sleeved on the piston rod 241 is elastically connected with the top of the gland 24 and the shell 21; a connecting plate 358 is fixedly installed on the extension plate 356 of the second adjusting valve core 35, the connecting plate 358 extends vertically upwards and is fixedly connected with the top end of the piston rod 241, and the second adjusting valve core 35 moves upwards to drive the gland 24 to move upwards.

In this embodiment, when the filter cottons 23 are stacked in the laminated filter 2, the pressure of the upper gland 24 keeps the filtering holes formed by splicing the grooves of the upper and lower filter cottons 23 stable, and when the water flows from bottom to top in the back flushing process, the stacked filter cottons 23 can be driven to move upwards, so that the interval between the two adjacent filter cottons 23 is increased, impurities are convenient to separate from the filtering holes of the filter cottons 23, but when the interval between the filter cottons 23 is increased, the pressure of the upper filter cottons 23 and the elastic force of the gland 24 need to be overcome, the gland 24 in this embodiment ensures the pressing of the filter cottons 23 through the elastic force of the spring 242, the piston rod 241 on the upper side of the gland 24 extends to the outside through the shell 21 to be connected with the connecting plate 358, and the second regulating valve core 35 moves upwards to drive the connecting plate 358 arranged on the extension plate 356 in the back flushing process, thereby automatically driving the gland 24 to move upwards and compress the spring 242, reducing the pressure applied to the filter cottons 23, so that the interval between the filter cottons 23 is easier to be increased, and the back flushing effect is improved.

In order to solve the problem that the water flow rate is low due to the easy misalignment of the grooves of the filter cotton 23, the following features are specifically provided:

the inner side of the filter cotton 23 is provided with a collar 231, the upper side of the collar 231 is provided with a plurality of positioning grooves 232, and the positioning grooves 232 are arranged at equal intervals around the axis of the collar 231; the underside of the collar 231 is provided with positioning teeth 233 in the same number and positions as the positioning grooves 232, and the grooves on the filter plug 23 are aligned when the positioning teeth 233 are inserted into the positioning grooves 232.

An arc-shaped flow guide strip 234 is arranged on the upper side of the lantern ring 231, and two ends of the arc-shaped flow guide strip 234 are respectively attached to the outer sides of two adjacent positioning grooves 232; the upper side surfaces of the arc-shaped guide strips 234 are flush with the upper surfaces of the two sides of the positioning groove 232, and the upper surfaces of the arc-shaped guide strips 234 are lower than the upper surfaces of the filter cotton 23.

The filter cotton 23 in the embodiment is sleeved outside the filter element 22 through the inner sleeve ring 231, and when the filter cotton 23 positioned at the upper layer is inserted into the positioning groove 232 positioned on the filter cotton 23 positioned at the lower side through the positioning teeth 233 at the bottom of the sleeve ring 231, the grooves on the filter cotton 23 are aligned, so that the structure completion of the filter holes and the water passing rate are ensured; the positioning grooves 232 and the positioning teeth 233 are distributed at equal intervals around the axis of the collar 231, so that enough space is reserved between the collar 231 for water to pass through after the positioning teeth 233 are inserted into the lower positioning groove 232, when purified water flows from bottom to top in the back flushing process, the water moves along the arc guide strips 234 between the positioning grooves 232 at this time, thrust is generated on the positioning teeth 233, the filter cotton 23 rotates, impurities are easier to separate from the filter cotton 23 through centrifugal force, the back flushing effect is improved, when the separation distance of the filter cotton 23 is too large, the positioning grooves 232 and the positioning teeth 233 are separated, during resetting, the upper side surfaces of the arc guide strips 234 are flush with the upper surfaces of two sides of the positioning grooves 232, the positioning teeth 233 can only be attached to the upper sides of the arc guide strips 234 when not entering the positioning grooves 232, and can restore the alignment of the grooves as the positioning teeth 233 are inserted into the positioning grooves 232 along with the rotation of the filter cotton 23, and the upper surfaces of the arc guide strips 234 are lower than the upper surfaces of the filter cotton 23, so that gaps between the arc guide strips 234 can be reserved when the filter cotton 23 is stacked.

Working principle: when the sewage is in a filtering state, the first valve 31 is controlled to be opened by the first regulating valve core 34 of the H-shaped switching valve 3, the second valve 32 is closed, the sewage enters the first valve 31 through the water outlet pipe 11, enters the shell 21 through the first valve 31 along the sewage water inlet 211 of the laminated filter 2, and after being filtered by the filter cotton 23, clean water is discharged to the water outlet pipe 11 along the purified water outlet 221 through the filter core 22; when impurities in the sewage block filter holes among filter cotton 23 more, the water level and the pressure in the shell 21 are raised to be detected by a water level monitor or a water pressure meter, a signal is sent to the two-position three-way valve 13, the two-position three-way valve 13 cuts off the communication between the purified water outlet 221 and the water outlet pipe 11, the purified water filtered by other laminated filters 2 is reversely conveyed into the laminated filters 2, at the moment, the first valve 31 is blocked by the first regulating valve core 34, the second valve 32 is opened, the laminated filters 2 enter a back flushing working state, reversely flowing purified water is matched with the second regulating valve core 35 to enter the filter core 22, the impurities in the filter holes of the filter cotton 23 are flushed out, the sewage with the impurities is discharged into the sewage draining pipe 12 through the 222 and the second valve 32, the laminated filters 2 recover the filtering effect after the back flushing is finished, and the H-shaped switching valve 3 resets the repeated filtering effect again.

The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. The utility model provides an H type automatic back flush filter equipment, including inlet tube (1), outlet pipe (11), blow off pipe (12) and a plurality of lamination formula filter (2), its characterized in that, lamination formula filter (2) include casing (21) and coaxial arrangement at inside filter core (22) of casing (21), filter core (22) bottom sets up water outlet (221), filter core (22) outside piles up and is provided with a plurality of filter pulp (23), casing (21) top elastic mounting gland (24), gland (24) apply filter pulp (23) decurrent elasticity, casing (21) bottom is provided with sewage water inlet (211) and sewage delivery port (212);

the bottom of each lamination type filter (2) is provided with an H-shaped switching valve (3), and the H-shaped switching valves (3) comprise a first valve (31), a second valve (32) and a third valve (33) which are parallel to each other in axis;

the first valve (31) is communicated with the sewage inlet (211) and the water inlet pipe (1), the second valve (32) is communicated with the sewage outlet (212) and the sewage discharge pipe (12), the third valve (33) is communicated with the purified water outlet (221) and the water outlet pipe (11), and a two-position three-way valve (13) is further arranged between the third valve (33) and the water outlet pipe (11);

the H-shaped switching valve (3) further comprises a first adjusting valve core (34) and a second adjusting valve core (35), the first adjusting valve core (34) synchronously controls the first valve (31) and the second valve (32) to be in opposite opening and closing states, the second adjusting valve core (35) is coaxially arranged in the third valve (33), and the second adjusting valve core (35) is matched with the two-position three-way valve (13) to control the flowing direction of liquid in the third valve (33).

2. The H-type automatic backwash filter device according to claim 1, wherein the first valve (31) and the second valve (32) have the same structure, an upper flow passage (311) and a lower flow passage (312) are arranged in the first valve (31), one ends of the upper flow passage (311) and the lower flow passage (312) are communicated with an inner cavity of a valve cover (313) arranged at one side of the first valve (31), and the valve covers (313) of the first valve (31) and the second valve (32) are arranged oppositely;

the two ends of the first regulating valve core (34) are provided with plugging valve cores (341) with the same cross-sectional shape as the inner cavity of the valve cover (313), and the plugging valve cores (341) are slidably arranged in the inner cavity of the valve cover (313) and move along the horizontal direction perpendicular to the axis of the first valve (31).

3. The H-type automatic backwash filter device according to claim 2, wherein a horizontal guide rod (342) is provided on the plugging valve core (341), the guide rod (342) is inserted into a guide hole (314) provided on the valve cover (313) to extend to the outside of the valve cover (313), the guide rods (342) on the first valve (31) and the second valve (32) are respectively connected to two ends of the connecting ring (343), and the third valve (33) is located inside the connecting ring (343).

4. An H-type automatic backwash filter device according to claim 3, wherein an upper limit ring (331) and a lower limit ring (332) surrounding the inner wall are arranged in the third valve (33), a second adjusting valve core (35) is slidably arranged between the upper limit ring (331) and the lower limit ring (332), the outer wall of the second adjusting valve core (35) is attached to the inner wall of the third valve (33), and an inner channel (351) is coaxially arranged in the second adjusting valve core (35);

the top end of the inner channel (351) is hinged with a unidirectional valve plate (352) which is turned downwards in a unidirectional way;

and a return channel (333) is arranged on one side of the third valve (33), the bottom end of the return channel (333) is communicated to the upper side of the lower limiting ring (332), the top end of the return channel (333) is communicated to the upper side of the upper limiting ring (331), and the length of the second regulating valve core (35) is smaller than the difference between the linear distance between the upper limiting ring (331) and the lower limiting ring (332) and the inner diameter of the return channel (333).

5. The H-type automatic backwash filter device according to claim 4, wherein the cross-sectional shape of the inner passage (351) is rectangular, and the check valve plate (352) seals the inner passage (351) after being horizontally spliced.

6. The H-type automatic backwash filter device according to claim 4, wherein an elastic sheet (353) is provided at the lower side of the check valve plate (352), the elastic sheet (353) applying an upward-turning elastic force of the check valve plate (352);

and a stop block (354) is arranged on two sides of the top end of the inner channel (351) of the second regulating valve core (35), and when the check valve plate (352) is horizontal, the bottom of the stop block (354) is attached to the upper side of the check valve plate (352).

7. The H-type automatic backwash filter device according to claim 4, wherein a stop lever (355) extending horizontally in the radial direction is provided on the outer side of the second regulating valve core (35), the stop lever (355) is slidably mounted in a first waist-shaped hole (334) provided on the peripheral side of the third valve (33), and the first waist-shaped hole (334) extends vertically along the axial direction of the third valve (33);

the limiting rod (355) is connected with the extension plate (356), and two ends of the extension plate (356) are provided with horizontally extending ejector rods (357);

the rotary drum (335) is rotatably arranged on two sides of the outer part of the third valve (33), a spiral limit groove (336) is formed in the peripheral side of the rotary drum (335), and the top end of the ejector rod (357) is in limit insertion in the spiral limit groove (336);

the bottom of the rotary drum (335) is provided with a connecting arm (337) which extends horizontally, and the connecting arm (337) is provided with a second waist-shaped hole (338) which extends along the length direction of the connecting arm (337);

two sides of a connecting ring (343) of the first regulating valve core (34) are provided with vertical upward straight rods (344), and the straight rods (344) are slidably arranged in the second waist-shaped holes (338).

8. The H-type automatic backwash filter device according to claim 7, wherein a piston rod (241) is arranged at the top of the gland (24) of the laminated filter (2), the piston rod (241) vertically extends to the outer side of the shell (21), and a spring (242) sleeved on the piston rod (241) is elastically connected with the top of the gland (24) and the top of the shell (21);

and a connecting plate (358) is fixedly arranged on an extension plate (356) of the second regulating valve core (35), the connecting plate (358) vertically extends upwards and is fixedly connected with the top end of the piston rod (241), and the second regulating valve core (35) moves upwards to drive the gland (24) to move upwards.

9. The H-type automatic backwash filter device according to claim 8, wherein a collar (231) is provided on the inner side of the filter cotton (23), a plurality of positioning grooves (232) are provided on the upper side of the collar (231), and the positioning grooves (232) are arranged at equal intervals around the axis of the collar (231);

the lower side of the lantern ring (231) is provided with positioning teeth (233) with the same number and positions as the positioning grooves (232), and grooves on the filter cotton (23) are aligned when the positioning teeth (233) are inserted into the positioning grooves (232).

10. The H-type automatic backwash filter device according to claim 9, wherein an arc-shaped guide strip (234) is arranged on the upper side of the collar (231), and two ends of the arc-shaped guide strip (234) are respectively attached to the outer sides of two adjacent positioning grooves (232);

the upper side surfaces of the arc-shaped guide strips (234) are flush with the upper surfaces of the two sides of the positioning groove (232), and the upper surfaces of the arc-shaped guide strips (234) are lower than the upper surfaces of the filter cotton (23).