CN211752899U

CN211752899U - Pre-filter with filter screen self-cleaning function

Info

Publication number: CN211752899U
Application number: CN201921023842.3U
Authority: CN
Inventors: 曹开军
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-03
Filing date: 2019-07-03
Publication date: 2020-10-27
Anticipated expiration: 2029-07-03

Abstract

The utility model relates to a pre-filter with a filter screen self-cleaning function, which comprises a machine head provided with a water inlet port and a water outlet port, a filter flask connected with the machine head and a drainage structure connected with the lower end of the filter flask, wherein a filtering mechanism is arranged in the filter flask, the filtering mechanism comprises a water diversion cover, a filter screen framework, a central water inlet pipe and a filter screen, the top of the machine head is provided with an assembly cavity, and a driving mechanism is fixedly arranged in the assembly cavity; the driving mechanism comprises a driving control assembly and a driving shaft, the driving shaft axially extends into the filtering mechanism and is fixed with the filtering mechanism, the power output end of the driving control assembly is in variable clutch linkage with the driving shaft, when the power output end of the driving control assembly is disconnected from the driving shaft for linkage, the sewage discharge waterway of the drainage structure is closed, when the power output end of the driving control assembly is in linkage with the driving shaft, the sewage discharge waterway of the drainage structure is opened, and when linkage is kept, the filtering mechanism can rotate under the driving of the driving control assembly to realize self-cleaning and decontamination of the filter screen by means of centrifugal force.

Description

Pre-filter with filter screen self-cleaning function

Technical Field

The utility model relates to a leading filter with filter screen self-cleaning function belongs to quality of water clarification plant technical field.

Background

The prior art pre-filter comprises: the machine head is provided with a water inlet port and a water outlet port, the filter flask is connected with the machine head, and the drainage structure is connected with the lower end of the filter flask, and the filter flask is internally provided with a filter mechanism. In the using process, water flows into a gap between the filter flask and the filter mechanism from the water inlet port, flows into the center of the filter mechanism after being filtered by the filter mechanism, and then flows to the water outlet port from the center of the filter mechanism.

Current leading filter, long-time use back filter mechanism can block up, needs to change or wash, and its cleaning methods of current leading filter are mostly manual rotation filter mechanism in order to realize that the normal position is scraped and is washed or wash, perhaps scrapes through the rotatory normal position of realization of motor drive filter mechanism and washes or wash.

The washing of current leading filter screen is mainly washd, back flush principle by the siphon and is realized, the utility model discloses the brand-new mode that utilizes centrifugal force to take off the washing aims at solving the technological not enough of the aspects such as the cost is higher, the structure is complicated relatively, the cleaning efficiency is lower, the operation is hard that exist among the above-mentioned principle scheme, creatively provides a leading filter with filter screen self-cleaning function.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to solve the defects of the prior art and provide a pre-filter with a self-cleaning function of a filter screen.

The utility model provides a technical scheme that its technical problem adopted is:

the pre-filter with the function of self-cleaning the filter screen comprises a machine head provided with a water inlet port and a water outlet port, a filter flask connected with the machine head and a drainage structure connected with the lower end of the filter flask, wherein a filter mechanism is arranged in the filter flask, the filter mechanism comprises a water diversion cover, a filter screen framework, a central water inlet pipe and a filter screen,

the top of the machine head is provided with an assembly cavity, and a driving mechanism is fixedly arranged in the assembly cavity;

the driving mechanism comprises a driving control assembly and a driving shaft, the driving shaft axially extends into the filtering mechanism and is fixed with the filtering mechanism, the power output end of the driving control assembly is in variable clutch linkage with the driving shaft, when the power output end of the driving control assembly is disconnected from the driving shaft for linkage, the sewage discharge waterway of the drainage structure is closed, when the power output end of the driving control assembly is in linkage with the driving shaft, the sewage discharge waterway of the drainage structure is opened, and when linkage is kept, the filtering mechanism can rotate under the driving of the driving control assembly to realize self-cleaning and sewage removal of the filter screen by virtue of centrifugal force.

Defining: the variable clutch is linked, and the linked state can be freely (manually or electrically) disconnected or maintained again as required under the action of external force. When the linkage is disconnected, the pre-filter is in a normal filtering state; when linkage is maintained, the pre-filter is in a self-cleaning and decontamination state. The switching of the linkage mode does not change the structure of the pre-filter.

Preferably, the utility model provides a manual mode, the drive control subassembly includes:

the impeller is arranged in the assembly cavity, and the fins of the impeller correspond to the water inlet port of the machine head and receive the power of water flow at the water inlet port;

the manual adjusting mechanism comprises an adjusting knob, a sealing element and an adjusting knob assembling seat, a driving shaft penetrates through the adjusting knob assembling seat and is sealed through the sealing element, the adjusting knob is fixed with the end part of the driving shaft, the adjusting knob assembling seat is fixed with the machine head, the adjusting knob is supported by the adjusting knob assembling seat and can axially move at least up and down, after the adjusting knob moves up for a certain stroke, the impeller and the driving shaft are kept in linkage, and after the adjusting knob moves down for a certain stroke, the impeller and the driving shaft are disconnected and linked;

the axial stroke value of the adjusting knob relative to the adjusting knob assembling seat is adapted to the stroke value of the linkage and the release of the linkage of the impeller and the driving shaft.

Preferably, the utility model provides a manual-automatic mode, the drive control subassembly includes:

the manual-automatic integrated adjusting mechanism comprises an adjusting knob, a sealing piece, a transmission buckle, a driving motor, a motor support and an adjusting knob assembling seat, wherein a driving shaft penetrates through the adjusting knob assembling seat and is sealed through the sealing piece, the adjusting knob is fixed with the end part of the driving shaft, and the adjusting knob assembling seat is fixed with a machine head;

the motor bracket is fixedly arranged at the top of the adjusting knob assembling seat, the end part of the driving motor is vertically and fixedly provided with a screw rod, the screw rod is in threaded connection with the transmission buckle, the transmission buckle and the adjusting knob can be detachably fixed after penetrating through the motor bracket,

the adjusting knob can be supported by the adjusting knob assembling seat and can axially move at least up and down, the impeller and the driving shaft keep linkage after moving upwards for a certain stroke, and the impeller and the driving shaft are disconnected after moving downwards for a certain stroke;

the length of the screw rod is adapted to a stroke value required by linkage or linkage release of the driving shaft and the impeller, and is also adapted to a stroke value of the adjusting knob relative to the upper and lower axial actions of the adjusting knob assembling seat.

The drive control assembly drives the drive shaft to move up and down and perform circular motion by adding a drive motor on the basis of relying on the impeller, so that manual, automatic or semi-automatic operation, regular cleaning and pollution discharge can be realized under the control of an external electric control assembly (matched according to an application scene during specific application).

In the scheme, the transmission shaft end of the driving motor is a threaded screw rod, the length of the threaded screw rod is consistent with the stroke value of the driving shaft, the inner hole of the transmission buckle is a threaded hole and is fixedly assembled with the adjusting knob in a clamping mode, when the electric control assembly controls the driving motor to rotate, and the transmission buckle moves upwards, the adjusting knob is limited by the adjusting knob assembling seat and can only move upwards along with the axial direction, when the stroke is finished, the screw rod reaches the limit, and the adjusting knob is not limited by the adjusting knob assembling seat any more, so that the circular motion is started under the action of the driving motor, and the centrifugal pollution discharge is realized; when the sewage discharge is finished, the driving motor rotates reversely and moves axially downwards, and after the stroke is finished, the movement is stopped.

Preferably, the drive control assembly includes:

the electric adjusting mechanism comprises a driving motor, a worm and gear structure, a sealing element and an adjusting mechanism assembling seat, wherein any one of the worm and gear is connected with an output shaft of the driving motor, the other one of the worm and gear is fixed with the end part of the driving shaft, the driving shaft penetrates through the adjusting mechanism assembling seat and is sealed through the sealing element, the adjusting mechanism assembling seat is fixed with the machine head, the driving motor drives the worm or gear to drive the driving shaft to move up and down axially, an impeller is linked with the driving shaft after moving up for a certain stroke, and the impeller is disconnected from the driving shaft after moving down for a certain stroke;

the worm gear structure can realize the adaptation of the axial stroke value and the stroke value required by the linkage or the release of the linkage of the driving shaft and the impeller.

Preferably, the drive control assembly includes:

pneumatic adjustment mechanism, including telescopic cylinder, sealing member and adjustment mechanism assembly seat, the drive shaft passes adjustment mechanism assembly seat and is sealed through the sealing member, the vertical setting of telescopic cylinder, telescopic cylinder's piston rod and drive shaft end fixing, adjustment mechanism assembly seat is fixed with the aircraft nose, telescopic cylinder drives the upper and lower axial action of drive shaft, after up action certain stroke, the impeller keeps the linkage with the drive shaft, after down action certain stroke, impeller and drive shaft disconnection linkage, telescopic cylinder's stroke value and drive shaft and impeller linkage or release the required stroke value of linkage and adapt to.

Preferably, the driving shaft is further provided with a rotation resistance reducing structure to ensure that the impeller and the driving shaft can freely move circularly under the power of water flow transmitted by the impeller and the condition of overcoming the power loss of the water flow to the maximum extent after the impeller and the driving shaft are kept in linkage.

More preferably, the rotation resistance reducing structure is implemented as follows: the driving shaft is arranged in at least two sections, the first section is an adjusting section, the other section is a driving section, at least the top of the driving section is provided with a cavity, and the driving section is also provided with a first linkage part linked with the impeller and a second linkage part linked with the central water inlet pipe;

the adjusting section and the driving section are sleeved and can rotate relatively, and the driving section and the central water inlet pipe can be driven to move axially integrally;

the tail end of the driving section penetrates through the central water inlet pipe, extends into the sewage discharging structure and is connected with the sewage discharging structure in a rotating and sealing mode.

Preferably, the driving shaft is arranged in at least three sections, the first section is an adjusting section, the second section is a driving section, the third section is a guiding fixing section, at least the top of the driving section is provided with a cavity, and the first linkage part and the double linkage part are arranged at two ends of the driving section;

the adjusting section and the driving section are sleeved and can rotate relatively, the bottom end of the adjusting section extends out of the driving section and is axially limited with the central water inlet pipe through a limiting piece, and the adjusting section can drive the driving section and the central water inlet pipe to integrally and axially move;

one section of the guide fixing section is sleeved on the central water inlet pipe, is axially limited through the limiting part and can move along with the central water inlet pipe in the axial direction, the central water inlet pipe and the guide fixing section can rotate synchronously or asynchronously, and the other end of the guide fixing section extends into the pollution discharge structure and is hermetically connected with the pollution discharge structure.

Preferably, the assembly cavity of the front filter is also provided with a closure cover, the side face of the closure cover is provided with a water through hole, the closure cover is sleeved with the adjusting section and covers the outer part of the impeller, the closure cover is linked with the adjusting section, after the impeller is linked with the driving section, the impeller and the closure cover can independently rotate for a certain angle, preferably, the assembly cavity is also provided with a limiting part for limiting the rotation angle of the closure cover, and the maximum rotation angle of the closure cover is 90 degrees.

The intercepting cover is added on the basis of the original impeller, and after the driving shaft finishes the upward stroke, the intercepting cover can be driven to do circular motion for a certain angle through the transmission of the adjusting knob; at the moment, the water through hole on the closure cover and the water inlet port of the machine head can change the water flow passing section entering the impeller due to mutual staggering; under the design, when the water inlet pressure is constant, the water inlet section is reduced, and the water flow pressure of the water inlet impeller is doubled, so that the stress of the impeller is increased, and the rotating speed is increased; otherwise, the rotating speed is reduced, namely the stress of the impeller can be adjusted through the size of the through hole, and then the rotating speed is adjusted.

The scheme also comprises a scheme that an electric adjusting mechanism is used as a driving control mode, a transmission shaft end of a driving motor is a threaded lead screw, the length of the lead screw is consistent with the stroke value of the driving shaft, an inner hole of a transmission buckle is a threaded hole and is fixedly assembled with an adjusting knob in a clamping mode, when an electric control assembly controls the driving motor to rotate, and the transmission buckle moves upwards, the adjusting knob is limited by an adjusting knob assembling seat and only moves upwards along with the axial direction, when the stroke is finished, the lead screw reaches the limit, the adjusting knob is not limited by the adjusting knob assembling seat any more at the moment, circular motion is started under the action of the driving motor, and a flow-stopping cover is controlled to change the passing section of water flow, so that the function of adjusting the size of water; when the sewage discharge is finished, the driving motor rotates reversely, the screw rod is released from the screwing state after the circular motion of the closure cover reaches the limiting part, the screw rod moves downwards in the axial direction, and the motion is stopped after the stroke is finished.

Preferably, the impeller is axially provided with at least one assembling groove in the center, the part opposite to the driving shaft is provided with at least one adaptive assembling strip, linkage is realized through the matching of the assembling groove and the assembling strip by means of external force, and disconnection linkage is realized through the releasing of the matching of the assembling groove and the assembling strip.

Preferably, manual adjustment mechanism still includes first locating part and second locating part, and the drive shaft includes first spacing groove and second spacing groove, and adjust knob cup joints with the drive shaft, and both ends are spacing fixed through the cooperation of first locating part, first spacing groove and second locating part, second spacing groove respectively, and first locating part and second locating part all include a jump ring, steel wire clamp and mould die mould pressing or a class of limit structure of car-out boss.

Preferably, the adjusting knob assembly seat is in threaded connection with the machine head, at least one sliding groove is axially formed in the adjusting knob, at least one sliding block is correspondingly arranged on the adjusting knob, the adjusting knob can axially slide up and down under the action of external force through the matching of the sliding groove and the sliding block, and the adjusting knob can rotate for a certain angle circumferentially after the impeller slides to a certain stroke and keeps linked with the driving shaft.

Preferably, the manual-automatic adjusting mechanism further comprises a first limiting part and a second limiting part, the driving shaft comprises a first limiting groove and a second limiting groove, the adjusting knob is sleeved with the driving shaft, two ends of the adjusting knob are respectively matched and limited and fixed through the first limiting part, the first limiting groove, the second limiting part and the second limiting groove, and the first limiting part and the second limiting part respectively comprise a clamp spring, a steel wire clamp and a die pressing type or a type of limiting structure of a boss of a vehicle.

Preferably, the inlet water of the inlet port enters along the tangential direction to obtain the maximum contact area with the impeller and obtain the maximum impeller driving force, and the outlet of the assembly cavity is eccentrically arranged and close to the edge of the impeller.

Preferably, the blowdown structure includes blowdown water injection well choke and blowdown piston, and the blowdown water injection well choke rotates the drain of connecting in the filter flask bottom, and the bottom of blowdown piston and the bottom axial fixity of drive shaft, when the linkage is relieved down to the drive shaft, the airtight blowdown water route of blowdown piston and drain butt, when the drive shaft goes upward to keep the linkage, the butt is relieved with the drain to the blowdown piston, and the blowdown water route is opened.

Preferably, the central water inlet pipe is fully sealed in the circumferential direction, is sleeved with the driving shaft and is fixed in the radial relative position, the filter screen framework is sleeved outside the central water inlet pipe and is fixed in the radial relative position, a cavity between the filter screen framework and the central water inlet pipe forms a first raw water channel, the filter screen is sleeved and fixed outside the filter screen framework, a cavity between the filter bottle and the filter screen forms a second raw water channel, and the first raw water channel and the second raw water channel are at least communicated when a drainage water path of the sewage discharge structure is closed;

the top end of the filter screen framework is sleeved in an assembly cavity of the water diversion cover, a contact surface between the top end of the filter screen framework and the assembly cavity of the water diversion cover can be sealed, the diameter of the upper part of the assembly cavity of the water diversion cover is larger than that of the lower part of the assembly cavity of the water diversion cover, the water diversion cover and the driving shaft are sealed through a sealing element, the water diversion cover is provided with a raw water inlet and a purified water outlet, and a plurality of sealing elements for isolating the raw water inlet;

when the sewage discharge waterway is closed and the filtering mechanism is used for filtering normally, the water diversion cover is sealed with the filter screen framework, and raw water and purified water are not in series flow; when the sewage discharge waterway is opened, the water diversion cover and the filter screen framework are unsealed, and the water diversion cover assembly cavity is matched with the top end of the filter screen framework to realize that raw water and purified water are not in series flow.

Preferably, the filter mechanism further comprises a filter bottle scraping and washing piece, the filter bottle scraping and washing piece is sleeved outside the filter screen and can rotate synchronously along with the filter mechanism, and at least part of the filter bottle scraping and washing piece is abutted to the inner wall of the filter bottle.

Preferably, the filter flask scraping and washing piece comprises a framework and a plurality of scraping and washing fins fixedly arranged outside the framework, and the scraping and washing fins are abutted to the inner wall of the filter flask.

Preferably, the scraping and washing wing panel is arranged outside the framework in a spiral shape, and comprises a left spiral shape and a right spiral shape.

Preferably, the sewage discharging structure comprises a sewage discharging water nozzle and a sewage discharging piston, the sewage discharging water nozzle is rotatably connected to a sewage discharging port at the bottom of the filter bottle, the sewage discharging piston is fixed in the sewage discharging water nozzle, the top of the sewage discharging piston is provided with a sealing part with the diameter larger than that of other parts, and a sewage discharging water path is formed by a gap between the sewage discharging piston and the sewage discharging water nozzle;

the filter mechanism also comprises a filter bottle scraping and washing piece which is sleeved outside the filter screen and can synchronously rotate along with the filter mechanism, and at least part of the filter bottle scraping and washing piece is abutted against the inner wall of the filter bottle;

the filter flask scraping and washing piece comprises a framework and a plurality of scraping and washing fins fixedly arranged outside the framework, and the scraping and washing fins are abutted against the inner wall of the filter flask;

the framework can synchronously move up and down along with the filtering mechanism, when the framework moves down, the bottom end of the framework is abutted against the sealing part of the sewage discharge piston, the drainage structure is closed, and water flows into a cavity between the filtering mechanism and the filter flask from the outlet of the central water inlet pipe, is filtered and flows out from the purified water outlet; when the water-saving drainage device moves upwards, the bottom end of the framework is separated from the drainage piston, the drainage structure is closed, and water flows into the drainage waterway from the outlet of the central water inlet pipe and then flows out.

The utility model discloses utilize water conservancy to promote the high-speed rotation of impeller and produce centrifugal force and clear away filter screen spot, can scrape and wash the filter flask in the preferred scheme simultaneously, and can accomplish the filtration purifier of the switch in bottom blowdown water route at the top.

The impeller and the filtering mechanism are in a variable clutch linkage design, and when the sewage drainage waterway is closed, the impeller and the filtering mechanism are disconnected and linked; when the sewage disposal waterway is opened, the linkage is kept; the linkage mode switching process does not need to adjust the structure of the pre-filter.

Stains attached to the filter screen of the filter mechanism are separated from the filter screen and attached under the action of centrifugal force; the filtered water in the filter screen framework can also assist the back washing of the filter screen under the action of centrifugal force; the water entering the machine head enters the cavity of the impeller at a certain angle and is matched with the angle of the impeller, so that the maximum impact force is ensured; the water outlet of the assembly cavity is eccentric and close to the edge of the impeller, so that the impeller can be guaranteed to generate the optimal rotating speed, if the water outlet is arranged in the middle, the water flow cannot form vortex, and the obtained efficiency of the impeller is greatly reduced, so that the impeller rotates slowly or cannot rotate;

the whole filtering mechanism and the sewage draining mechanism are also in an integrated conversion design, when the driving shaft descends and the sewage draining waterway is closed, the waterway is in a path shown in figure 1, the filtering working state is normal, and the impeller and the filtering mechanism are separated from linkage at the moment; when the driving shaft drives the filtering mechanism to move upwards, the sewage discharge waterway is opened, the central water inlet pipe channel is directly communicated with the sewage discharge waterway, the inflow water is directly discharged and flows out, the water supply in the filter flask is stopped, so that no water flow generates huge resistance to the rotation of the filtering mechanism, at the moment, the impeller is linked with the filtering mechanism, all the water flow pressure is used for pushing the impeller, and under the simultaneous action of the two conditions, the filtering mechanism rotates at high speed, and the filtering mechanism can be ensured to fully exert the decontamination of the filter screen;

the filtering mechanism is provided with a filter flask scraping piece, so that when the filter flask is scraped, sewage can be discharged in an auxiliary manner, residual water in the filter flask can be removed, and wind resistance which influences the filtering mechanism to keep high speed can not be generated;

the part of whole filter mechanism except that divide the water cover adopts the design of changeable on-off formula with dividing the water cover: when the driving shaft moves downwards, the filtering mechanism is separated from the impeller in linkage, and the part of the filtering mechanism except the water diversion cover and the water diversion cover are kept in a sealing state; when the driving shaft moves upwards, the filtering mechanism and the impeller are linked again, in order to ensure that the resistance is minimum, the part of the filtering mechanism except the water diversion cover is separated from the sealing state, and the inlet of the central water inlet pipe and the lower end of the water inlet of the water diversion cover adopt an anti-wrapping type design, so that the other parts of the filtering assembly can be separated from the sealing state of the water diversion cover;

the drive shaft still is equipped with the rotational resistance and reduces the structure to ensure that impeller and drive shaft keep the linkage back, can be under the power of impeller transmission rivers free, under the condition that rivers power loss is overcome to the at utmost circular motion, as the best realization mode of a resistance reduction structure: the driving shaft adopts a three-section split design: the adjusting section, the driving section and the guide fixing section are designed in a split mode, at least the top of the driving section is provided with a cavity, and the cavity rotates around the adjusting section to transmit the power of the impeller to the filtering mechanism, so that the adjusting section cannot rotate along with the filtering mechanism, the friction loss is greatly reduced, and the influence of the damping of the sealing piece on the rotating speed of the driving control assembly is eliminated;

in the fixed section of lower direction extends to blowdown structure, improved the stability when filtering mechanism rotates, avoided eccentric or shake, in addition, the drive shaft segmentation design has reduced the length of part separately, very big reduction the processing risk, reduced the processing degree of difficulty.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded view of the present invention;

fig. 2 is a perspective view of the present invention in a filtering state;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a perspective view of the cleaning device of the present invention

FIG. 5 is a cross-sectional view of FIG. 4

FIG. 6 is a cross-sectional view of the head of the present invention;

fig. 7 is a partially exploded view of the present invention in a manual adjustment mode;

fig. 8 is a partial perspective view of the present invention in a manual adjustment mode filtration state;

FIG. 9 is a cross-sectional view of this FIG. 8;

fig. 10 is a partial perspective view of the cleaning device in a manual adjustment mode of the present invention;

FIG. 11 is a cross-sectional view of FIG. 10;

fig. 12 is a partially exploded view of the present invention in the motoring mode;

fig. 13 is a partial perspective view of the electric adjustment mode of the present invention in a filtration state;

FIG. 14 is a cross-sectional view of FIG. 13;

fig. 15 is a partial perspective view of the cleaning device in the electrically controlled mode of the present invention;

FIG. 16 is a cross-sectional view of FIG. 15;

in the figure: 1. the automatic water-saving filter comprises a first limiting part, 2, an adjusting knob, 3, a second limiting part, 4, an adjusting knob assembling seat, 5, a sealing part, 6, an impeller, 7, a machine head, 8, a water diversion cover, 9, a filter screen framework, 10, a filter screen, 11, an adjusting section, 12, a driving section, 13, a guide fixing section, 14, a central water inlet pipe, 15, a scraping and washing fin, 16, a framework, 17, a filter bottle, 18, a sewage discharging piston, 19, a sewage discharging water nozzle, 21, a transmission buckle, 22, a driving motor, 23, a motor support, 24, a screw rod, 25, a closure cover, 25a and a water through hole.

Detailed Description

Example 1:

as shown in fig. 1, 2, 3, 4 and 5, the pre-filter with the filter screen self-cleaning function comprises a machine head 7 with water inlet and outlet ports, a filter flask 17 connected with the machine head 7 and a drainage structure connected with the lower end of the filter flask 17, wherein a filter mechanism is arranged in the filter flask 17, the filter mechanism comprises a water diversion cover 20, a filter screen framework 21, a central water inlet pipe 14 and a filter screen 23,

the top of the machine head 7 is provided with an assembly cavity, and a driving mechanism is fixedly arranged in the assembly cavity;

The utility model discloses in, the linkage of variable separation and reunion, linkage state under the exogenic action, can be free (manual or electronic) break off the linkage as required or maintain the linkage again. When the linkage is disconnected, the pre-filter is in a normal filtering state; when linkage is maintained, the pre-filter is in a self-cleaning and decontamination state. The switching of the linkage mode does not change the structure of the pre-filter.

As shown in fig. 7-11, firstly, the utility model provides a manual mode's linkage and release realization scheme of linkage, the drive control subassembly includes:

the impeller 6 is arranged in the assembly cavity, and fins of the impeller 6 correspond to the water inlet port of the machine head 7 and receive the power of water flow at the water inlet port;

the manual adjusting mechanism comprises an adjusting knob 2, a sealing piece 5 and an adjusting knob assembling seat 4, wherein a driving shaft penetrates through the adjusting knob assembling seat 4 and is sealed through the sealing piece 5, the adjusting knob 2 is fixed with the end part of the driving shaft, the adjusting knob assembling seat 4 is fixed with a machine head 7, the adjusting knob 2 is supported by the adjusting knob assembling seat 4 and can axially move up and down at least, after the upward movement is carried out for a certain stroke (the lowest value is the stroke value of the impeller and the driving shaft which are completely and effectively linked), the impeller and the driving shaft are kept linked, and after the downward movement is carried out for a certain stroke (the lowest value is the stroke value of the impeller and the driving shaft which are completely and effectively decoupled), the impeller and the driving shaft;

the axial travel value of the adjusting knob 2 relative to the adjusting knob mounting seat 4 is adapted to the travel value of the linkage and the linkage release of the impeller 6 and the driving shaft.

As shown in fig. 12-16, in addition, the utility model provides an implementation scheme of linkage and release linkage of manual-automatic mode, the drive control subassembly includes:

the impeller 6 is arranged in the assembly cavity, and fins of the impeller 6 correspond to the water inlet port of the machine head and receive the power of water flow at the water inlet port;

the manual-automatic integrated adjusting mechanism comprises an adjusting knob 2, a sealing piece 5, a transmission buckle 23, a driving motor 22, a motor support 23 and an adjusting knob assembling seat 4, wherein a driving shaft penetrates through the adjusting knob assembling seat 4 and is sealed through the sealing piece 5, the adjusting knob 2 is fixed with the end part of the driving shaft, the adjusting knob assembling seat 4 is fixed with a machine head 7, and the fixing mode is mostly a bolt connection mode and is the fixing mode which is most easily realized;

the motor support 23 is fixedly arranged at the top of the adjusting knob assembly seat 4, the end part of the driving motor 22 is vertically and fixedly provided with a screw rod 24, the screw rod 24 is in threaded connection with the transmission buckle 23, and after the screw rod passes through the motor support 23, the transmission buckle 23 and the adjusting knob 2 are detachably fixed, particularly in a clamping manner;

the adjusting knob 2 can be supported by the adjusting knob assembling seat 4 and can axially move at least up and down, after moving upwards for a certain stroke (the lowest value is the stroke value of the impeller 6 and the driving shaft which are completely and effectively linked), the impeller 6 and the driving shaft are kept linked, and after moving downwards for a certain stroke (the lowest value is the stroke value of the impeller 6 and the driving shaft which are completely and effectively decoupled), the impeller 6 and the driving shaft are disconnected;

the length of the screw rod 24 is adapted to a stroke value required by linkage or linkage release of the driving shaft and the impeller 6, and is also adapted to a stroke value of the adjusting knob 2 relative to the up-and-down axial action of the adjusting knob assembling seat 4, so that the screw rod can be ensured to do circumferential rotation without being constrained by the adjusting rotary assembling seat 4.

In this implementation scheme, drive control assembly is on the basis of relying on impeller 6, newly-increased driving motor 22, drives drive shaft up-and-down motion and circular motion function to under the control of outside automatically controlled subassembly (when specifically using, carry out supporting according to the application scene), can realize artificial, automatic or semi-automatization's operation, regularly wash and the blowdown.

In the scheme, the transmission shaft end of the driving motor 22 is provided with a threaded screw rod 24, the length of the threaded screw rod 24 is consistent with the stroke value of the driving shaft, the inner hole of the transmission buckle 23 is a threaded hole and is fixedly assembled with the adjusting knob 2 in a clamping manner, when the electric control assembly controls the driving motor 22 to rotate, and the transmission buckle 23 moves upwards, the adjusting knob 2 is limited by the adjusting knob assembling seat 4 and can only move upwards along with the axial direction, when the stroke is finished, the screw rod 24 reaches the limit, and at the moment, the adjusting knob 2 is not limited by the adjusting knob assembling seat 4 any more, so that the circular motion is started under the action of the driving motor 22, and the centrifugal pollution discharge is; when the sewage discharge is finished, the driving motor 22 rotates reversely and moves downwards in the axial direction, and the movement is stopped after the stroke is finished.

It specifically arrives the utility model discloses in, the drive shaft still is equipped with the turning resistance and reduces the structure to ensure that impeller 6 keeps linking the back with the drive shaft, can be under the power of impeller 6 transmission rivers free, the at utmost overcome circular motion under the condition of rivers power loss.

More specifically, the rotation resistance reducing structure is realized by the following means: the driving shaft is arranged in at least two sections, the first section is an adjusting section 11, the other section is a driving section 12, at least the top of the driving section 12 is provided with a cavity, and the driving section 12 is also provided with a first linkage part 12a linked with the impeller 6 and a second linkage part 12b linked with the central water inlet pipe 14;

the adjusting section 11 and the driving section 12 are sleeved and can rotate relatively, and the driving section 12 and the central water inlet pipe 14 can be driven to move axially integrally;

the tail end of the driving section 12 extends into the sewage draining structure after passing through the central water inlet pipe 14 and is connected with the sewage draining structure in a rotating and sealing way.

Further preferably, the driving shaft of the present invention is divided into three sections, the first section is an adjusting section 11, the second section is a driving section 12, the third section is a guiding fixing section 13, at least the top of the driving section 12 is provided with a cavity, and the first linkage part 12a and the second linkage part 12b are arranged at two ends of the driving section 12;

the adjusting section 11 and the driving section 12 are sleeved and can relatively rotate, the bottom end of the adjusting section 11 extends out of the driving section 12 and is axially limited with the central water inlet pipe 14 through a limiting piece, and the adjusting section 11 can drive the driving section 12 and the central water inlet pipe 14 to integrally move axially;

one section of the guide fixing section 13 is sleeved on the central water inlet pipe 14 and axially limited by the limiting piece, and can axially move along with the central water inlet pipe 14, the central water inlet pipe 14 and the guide fixing section 13 can synchronously or asynchronously rotate, and the other end of the guide fixing section extends into the sewage discharging structure and is hermetically connected with the sewage discharging structure.

As shown in fig. 4, the assembly cavity of the pre-filter is further provided with a closure cover 25, a water through hole 25a is formed in the side surface of the closure cover 25, the closure cover 25 is sleeved with the adjusting section 11 and covers the outer portion of the impeller 6, the closure cover 25 is linked with the adjusting section 11, after the impeller 6 is linked with the driving section 12, the impeller 6 and the closure cover 25 can independently rotate, preferably, the assembly cavity is further provided with a limiting portion for limiting the rotation angle of the closure cover, and the maximum rotation angle of the closure cover is 90 °.

The intercepting cover 25 is added on the basis of the original impeller 6, and after the driving shaft finishes the upward stroke, the intercepting cover 25 can be driven to do circular motion through the transmission of the adjusting knob 2; at this time, the water through hole 25a on the closure cover 25 and the water inlet port of the machine head 7 can change the water flow passing section entering the impeller 6 due to mutual alternation; under the design, when the water inlet pressure is constant, the water inlet section is reduced, and the water flow pressure of the water inlet impeller 6 can be increased in multiples, so that the stress of the impeller 6 is increased, and the rotating speed is increased; otherwise, the rotation speed is reduced, that is, the stress of the impeller 6 can be adjusted by the size of the water through hole 25a, so that the rotation speed is adjusted.

The utility model discloses in, 6 central axial of impeller are equipped with an at least assembly groove, and the position that the drive shaft is relative is equipped with the assembly strip of an at least adaptation, borrow by external force, realize the linkage through the cooperation of assembly groove and assembly strip, realize the disconnection linkage through the cooperation of removing of assembly groove and assembly strip.

It specifically arrives the utility model discloses, manual adjustment mechanism still includes first locating part 1 and second locating part 3, and the drive shaft includes first spacing groove and second spacing groove, and adjust knob 2 cup joints with the drive shaft, and both ends are spacing fixed through the cooperation of first locating part 1, first spacing groove and second locating part 3, second spacing groove respectively, and first locating part 1 and second locating part 3 all include jump ring, steel wire clamp and mould die mould or the first class limit structure of car-out boss, jump ring commonly used.

In particular, in the utility model, the adjusting knob assembly seat 4 is in threaded connection with the machine head 7, the axial direction of the adjusting knob assembly seat is provided with at least one sliding chute, the adjusting knob is correspondingly provided with at least one sliding block, through the matching of the sliding chute and the sliding block, under the action of external force, the impeller 6 can axially slide up and down, after the impeller 6 slides to a certain stroke and keeps linked with the driving shaft, the adjusting knob 2 can also circumferentially rotate for a certain angle, manual-automatic adjustment mechanism still includes first locating part 1 and second locating part 3, and the drive shaft includes first spacing groove and second spacing groove, and adjust knob 2 cup joints with the drive shaft, and both ends are spacing fixed through the cooperation of first locating part 1, first spacing groove and second locating part 3, second spacing groove respectively, and first locating part 1 and second locating part 3 all include jump ring, steel wire clamp and mould die mould pressing or the like limit structure of car-out boss.

As shown in fig. 6, the inlet water of the inlet port enters along the tangential direction to obtain the maximum contact area with the impeller 6 and obtain the maximum driving force of the impeller 6, and the outlet of the assembly cavity is eccentrically arranged and close to the edge of the impeller 6.

The utility model discloses in, blowdown structure includes blowdown water injection well choke 19 and blowdown piston 18, and blowdown water injection well choke 19 rotates to be connected in the drain of filter flask 17 bottom, and the bottom of blowdown piston 18 and the bottom axial fixity of drive shaft, when the linkage is removed down to the drive shaft, the airtight blowdown water route of blowdown piston 18 and drain butt, when the drive shaft goes upward to keep linking, the butt is removed with the drain to blowdown piston 18, and the blowdown water route is opened.

In the utility model, more specifically, the central water inlet pipe 14 is circumferentially closed, is sleeved with the drive shaft and has a fixed radial relative position, the filter screen framework 9 is sleeved outside the central water inlet pipe 14, and has a fixed radial relative position, the cavity between the filter screen framework 9 and the central water inlet pipe 14 forms a first raw water channel, the filter screen 10 is sleeved and fixed outside the filter screen framework 9, the cavity between the filter bottle 17 and the filter screen 10 forms a second raw water channel, and the first and second raw water channels are communicated at least when the drainage water path of the sewage structure is closed;

the top end of the filter screen framework 9 is sleeved in an assembly cavity of the water diversion cover 8, the contact surface between the top end and the assembly cavity can be sealed, the diameter of the upper part of the assembly cavity of the water diversion cover 8 is larger than that of the lower part of the assembly cavity of the water diversion cover 8, the water diversion cover 8 and the driving shaft are sealed through a sealing element, the water diversion cover 8 is provided with a raw water inlet and a purified water outlet, and a plurality of sealing elements for isolating the raw water inlet and the purified water outlet are arranged between the water diversion;

when the sewage discharge waterway is closed and the filtering mechanism filters normally, the water diversion cover 8 and the filter screen framework 9 are sealed, and the raw water and the purified water are not in series flow; when the sewage discharge waterway is opened, the water diversion cover 8 and the filter screen framework 9 are unsealed, and the assembly cavity of the water diversion cover 8 is matched with the top end of the filter screen framework 9 to realize that raw water and purified water are not in series flow.

The utility model discloses a synchronous scraping of realizing the filter flask, filtering mechanism still includes the filter flask scraping piece, and the outside of filter screen 10 is located to the cover, can be along with the synchronous revolution of filtering mechanism, and filter flask scraping piece at least part and filter flask 17 inner wall butt, filter flask scraping piece includes framework 16 and fixed a plurality of scraping wings 15 of locating framework 16 outside, scrapes wings 15 and filter flask 17 inner wall butt, scraping wings 15 is the spiral setting in framework 16 outside, including left spiral and right spiral.

The utility model discloses in, the blowdown structure has an implementation also, explains as follows: the sewage discharge structure comprises a sewage discharge water nozzle 19 and a sewage discharge piston 18, the sewage discharge water nozzle 19 is rotatably connected to a sewage discharge port at the bottom of the filter flask 17, the sewage discharge piston 18 is fixed in the sewage discharge water nozzle 19, the top of the sewage discharge piston 18 is provided with a sealing part 18a with the diameter larger than that of other parts, and a sewage discharge water path is formed by a gap between the sewage discharge piston 18 and the sewage discharge water nozzle 19;

the filtering mechanism further comprises a filter bottle scraping and washing piece, the filter bottle scraping and washing piece is sleeved outside the filter screen 10 and can synchronously rotate along with the filtering mechanism, and at least part of the filter bottle scraping and washing piece is abutted against the inner wall of the filter bottle 17;

the filter flask scraping and washing piece comprises a framework 16 and a plurality of scraping and washing fins 15 fixedly arranged outside the framework 16, and the scraping and washing fins 15 are abutted against the inner wall of the filter flask 17;

the framework 16 can synchronously move up and down along with the filtering mechanism, when the framework moves down, the bottom end of the framework 16 is abutted against the sealing part 18a of the sewage discharge piston 18, the drainage structure is closed, and water flows into a cavity between the filtering mechanism and the filter flask 17 from the outlet of the central water inlet pipe 14, is filtered and flows out from the purified water outlet; when moving upwards, 16 bottom and blowdown pistons 18 of skeleton break away from, and drainage structures closes, and rivers flow out behind the blowdown water route by central inlet tube 14 export inflow, scrape and wash fin 15 and be the spiral setting in 16 outsides of skeleton, including left spiral and right spiral.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.

For example, the drive control assembly can also adopt a worm gear structure, and the specific construction mode is as follows:

the electric adjusting mechanism comprises a driving motor 22, a worm and gear structure, a sealing piece 5 and an adjusting mechanism assembling seat 4, wherein any one of a worm and a gear is connected with an output shaft of the driving motor 22, the other worm and gear is fixed with the end part of a driving shaft, the driving shaft penetrates through the adjusting mechanism assembling seat 4 and is sealed through the sealing piece 5, the adjusting mechanism assembling seat 4 is fixed with a machine head 7, the driving motor 22 drives the worm or gear to drive the driving shaft to move up and down axially, an impeller 6 is linked with the driving shaft after moving up for a certain stroke, and the impeller 6 is disconnected from the driving shaft after moving down for a certain stroke;

the worm gear structure can realize the adaptation of the axial stroke value and the stroke value required by the linkage or the release of the linkage of the driving shaft and the impeller 6.

In addition, the drive control assembly can also adopt the realization mode of a telescopic cylinder, and the drive control assembly comprises:

pneumatic adjustment mechanism, including telescopic cylinder, sealing member 5 and adjustment mechanism assembly seat 4, the drive shaft passes adjustment mechanism assembly seat 4 and is sealed through sealing member 5, the vertical setting of telescopic cylinder, telescopic cylinder 4's piston rod and drive shaft end fixing, adjustment mechanism assembly seat is fixed with aircraft nose 7, telescopic cylinder drive shaft upper and lower axial motion, after up action certain stroke, impeller 6 keeps the linkage with the drive shaft, after down action certain stroke, impeller 6 and drive shaft disconnection linkage, telescopic cylinder's stroke value and drive shaft and impeller 6 linkage or release the required stroke value of linkage and adapt to.

The structure of concrete worm gear screw rod and telescopic cylinder's structure all derives from prior art, the utility model discloses only to its integration application as the power supply, the condition that can not pay out creative work is realized to the description of ordinary technical staff technical writing scheme in this field the technical scheme of the utility model.

Claims

1. The pre-filter with the filter screen self-cleaning function comprises a machine head provided with a water inlet port and a water outlet port, a filter flask connected with the machine head and a drainage structure connected with the lower end of the filter flask, wherein a filter mechanism is arranged in the filter flask, the filter mechanism comprises a water diversion cover, a filter screen framework, a central water inlet pipe and a filter screen, and is characterized in that,

2. The pre-filter having a screen self-cleaning function according to claim 1, characterized in that: the drive control assembly includes:

3. The pre-filter having a screen self-cleaning function according to claim 1, characterized in that: the drive control assembly includes:

4. The pre-filter having a screen self-cleaning function according to claim 1, characterized in that: the drive control assembly includes:

5. The pre-filter having a screen self-cleaning function according to claim 1, characterized in that: the drive control assembly includes:

6. The pre-filter having a screen self-cleaning function according to claim 2, 3, 4 or 5, wherein: the driving shaft is also provided with a rotation resistance reducing structure to ensure that the impeller and the driving shaft can freely move circularly under the condition of overcoming the power loss of water flow to the maximum extent under the power of water flow transmitted by the impeller after keeping linkage.

7. The pre-filter having a screen self-cleaning function according to claim 6, wherein: the rotation resistance reducing structure is realized by adopting the following modes: the driving shaft is arranged in at least two sections, the first section is an adjusting section, the other section is a driving section, at least the top of the driving section is provided with a cavity, and the driving section is also provided with a first linkage part linked with the impeller and a second linkage part linked with the central water inlet pipe;

8. The pre-filter having a screen self-cleaning function according to claim 7, wherein: the driving shaft is at least divided into three sections, the first section is an adjusting section, the second section is a driving section, the third section is a guiding and fixing section, at least the top of the driving section is provided with a cavity, and the first linkage part and the second linkage part are arranged at two ends of the driving section;

the direction canned paragraph one end cup joints in central authorities ' inlet tube, and is spacing through the locating part axial, can follow central authorities ' inlet tube axial displacement, and central authorities ' inlet tube and direction canned paragraph can be synchronous or asynchronous rotation, and the other end extends to in the blowdown structure, and with blowdown structure sealing connection.

9. The pre-filter having a screen self-cleaning function according to claim 7 or 8, characterized in that: the assembly cavity of the pre-filter is also provided with a closure cover, the side surface of the closure cover is provided with a water through hole, the closure cover is sleeved with the adjusting section and covers the outer part of the impeller, the closure cover is linked with the adjusting section, and after the impeller is linked with the driving section, the impeller and the closure cover can independently rotate for a certain angle.

10. The pre-filter having a screen self-cleaning function according to claim 9, characterized in that: the assembly cavity is also internally provided with a limiting part for limiting the rotation angle of the interception cover, and the maximum rotation angle of the interception cover is 90 degrees.

11. The pre-filter having a screen self-cleaning function according to claim 2, 3, 4 or 5, wherein: the impeller is characterized in that at least one assembling groove is axially arranged in the center of the impeller, at least one adaptive assembling strip is arranged at the position opposite to the driving shaft, linkage is realized through the matching of the assembling groove and the assembling strip by means of external force, and disconnection linkage is realized through the releasing of the matching of the assembling groove and the assembling strip.

12. The pre-filter having a screen self-cleaning function according to claim 2, characterized in that: the manual regulation mechanism further comprises a first limiting part and a second limiting part, the driving shaft comprises a first limiting groove and a second limiting groove, the adjusting knob is sleeved with the driving shaft, two ends of the adjusting knob are respectively matched and limited and fixed through the first limiting part, the first limiting groove, the second limiting part and the second limiting groove, and the first limiting part and the second limiting part respectively comprise a clamp spring, a steel wire clamp and a die pressing type or a type of limiting structure of a boss turned out.

13. The pre-filter having a screen self-cleaning function according to claim 2, characterized in that: the adjusting knob assembly seat is in threaded connection with the machine head, at least one sliding groove is axially formed in the adjusting knob, at least one sliding block is correspondingly arranged on the adjusting knob, the adjusting knob can axially slide up and down under the action of external force through the matching of the sliding groove and the sliding block, and the adjusting knob can also rotate at a certain angle circumferentially after the impeller slides to a certain stroke and keeps linked with the driving shaft.

14. The pre-filter having a screen self-cleaning function according to claim 3, wherein: the manual-automatic integrated adjusting mechanism further comprises a first limiting part and a second limiting part, the driving shaft comprises a first limiting groove and a second limiting groove, the adjusting knob is sleeved with the driving shaft, two ends of the adjusting knob are respectively matched and limited and fixed through the first limiting part, the first limiting groove, the second limiting part and the second limiting groove, and the first limiting part and the second limiting part respectively comprise clamp springs, steel wire clamps and die pressing or a type of limiting structure of a boss of a vehicle.

15. The pre-filter having a screen self-cleaning function according to claim 2, 3, 4 or 5, wherein: the inlet water of the water inlet port enters along the tangential direction to obtain the maximum contact area with the impeller and obtain the maximum impeller driving force, and the water outlet of the assembly cavity is eccentrically arranged and is close to the edge of the impeller.

16. The pre-filter having a screen self-cleaning function according to claim 2, 3, 4 or 5, wherein: drainage structures includes blowdown water injection well choke and blowdown piston, and the blowdown water injection well choke rotates to be connected in the drain of filter flask bottom, and the bottom of blowdown piston is fixed with the bottom axial of drive shaft, and when the drive shaft removes the linkage down, the airtight blowdown water route of blowdown piston and drain butt, when the drive shaft goes upward to keep the linkage, the butt is removed with the drain to the blowdown piston, and the blowdown water route is opened.

17. The pre-filter with screen self-cleaning function as recited in claim 16, wherein: the central water inlet pipe is fully sealed in the circumferential direction, is sleeved with the driving shaft and is fixed in the radial relative position, the filter screen framework is sleeved outside the central water inlet pipe and is fixed in the radial relative position, a cavity between the filter screen framework and the central water inlet pipe forms a first raw water channel, the filter screen is sleeved and fixed outside the filter screen framework, a cavity between the filter bottle and the filter screen forms a second raw water channel, and the first raw water channel and the second raw water channel are at least communicated when a drainage water path of the sewage discharge structure is closed;

18. The pre-filter having a screen self-cleaning function according to claim 1, characterized in that: the filter mechanism further comprises a filter bottle scraping piece, the filter bottle scraping piece is sleeved outside the filter screen and can rotate synchronously along with the filter mechanism, and at least part of the filter bottle scraping piece is abutted to the inner wall of the filter bottle.

19. The pre-filter with screen self-cleaning function as recited in claim 18, wherein: the filter flask scraping and washing piece comprises a framework and a plurality of scraping and washing fins fixedly arranged on the outer portion of the framework, and the scraping and washing fins are abutted to the inner wall of the filter flask.

20. The pre-filter with screen self-cleaning function as recited in claim 19, wherein: the scraping and washing wing pieces are arranged outside the framework in a spiral shape and comprise a left spiral shape and a right spiral shape.

21. The pre-filter having a screen self-cleaning function according to claim 2, 3, 4 or 5, wherein: the drainage structure comprises a sewage discharge water nozzle and a sewage discharge piston, the sewage discharge water nozzle is rotatably connected to a sewage discharge port at the bottom of the filter flask, the sewage discharge piston is fixed in the sewage discharge water nozzle, the top of the sewage discharge piston is provided with a sealing part with a diameter larger than that of the part outside the top, and a sewage discharge waterway is formed by a gap between the sewage discharge piston and the sewage discharge water nozzle;

the framework can synchronously move up and down along with the filtering mechanism, when the framework moves down, the bottom end of the framework is abutted against the sealing part of the sewage discharge piston, the drainage structure is closed, and water flows into a cavity between the filtering mechanism and the filter flask from the outlet of the central water inlet pipe, is filtered and flows out from the purified water outlet; when the water-saving drainage device moves upwards, the bottom end of the framework is separated from the drainage piston, the drainage structure is opened, and water flows into the drainage waterway from the outlet of the central water inlet pipe and then flows out.

22. The pre-filter with screen self-cleaning function as recited in claim 21, wherein: the scraping and washing wing pieces are arranged outside the framework in a spiral shape and comprise a left spiral shape and a right spiral shape.