CN220047284U - Self-cleaning filtration equipment - Google Patents

Abstract

The utility model relates to self-cleaning filter equipment, which comprises an outer shell, a first filter and a second filter, wherein the outer shell is provided with a first cavity; a bracket detachably coupled to a top of the outer case; the inner shell is connected with the bracket and is accommodated in the first cavity, and the inner shell is provided with a second cavity communicated with the first cavity; one end of the filter screen is connected with the inner shell, and the other end of the filter screen is connected with the inner side wall defining the first cavity; the sewage drain pipe is connected to the bottom of the outer shell, is communicated with the first cavity, and is provided with a sewage drain outlet at one end far away from the outer shell; the buoyancy block is arranged in the second cavity; the valve plate is hinged to the drain pipe and used for sealing the drain outlet; and one end of the rope is connected with the buoyancy block, and the other end of the rope is connected with the valve plate. According to the self-cleaning filter equipment provided by the utility model, the opening and closing of the valve plate are not required to be controlled manually, and the full-automatic cleaning of the filter screen can be realized.

Description

Self-cleaning filtration equipment

Technical Field

The utility model relates to the technical field of water treatment equipment, in particular to self-cleaning filter equipment.

Background

The filter device is an important device in the water treatment system, and plays an important role in the normal operation of the water treatment device and in obtaining good water quality. The water to be treated flows through the filter screen after entering from the water inlet, then enters into a pipeline required by a user through the water outlet for process circulation, and residues and sludge in the water are trapped inside the filter screen. So continuous circulation, the residue and the mud that are held back on the filter screen are more and more, lead to the filter screen to block up, and then influence the filter effect, consequently need regularly wash the filter screen, traditional filtration equipment need demolish the back washing with the filter screen, waste time and energy, and the cleaning performance is poor. In order to solve the above problems, a filtering apparatus that can be self-cleaning is required. Most of the existing filtering equipment capable of realizing self-cleaning adopts siphoning or a water pump to realize self-cleaning of a filter screen, and has a complex structure.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

Therefore, an object of the present utility model is to provide a self-cleaning filter device, which uses filtered water as backwash water to enable water flow to backwash a filter screen, so as to realize self-cleaning of the filter screen; meanwhile, the filter equipment is provided with the impeller cleaning brush for cleaning the filter screen, so that the kinetic energy of the inflow water can be utilized to drive the impeller cleaning brush to rotate to clean the filter screen, and the cleaning efficiency of the filter screen is improved.

The embodiment of the utility model provides self-cleaning filter equipment, which comprises an outer shell, wherein the outer shell is provided with a first cavity; a bracket detachably coupled to a top of the outer case; an inner housing coupled with the bracket and received in the first cavity, the inner housing having a second cavity in communication with the first cavity; one end of the filter screen is connected with the inner shell, and the other end of the filter screen is connected with the inner side wall defining the first cavity; the drain pipe is connected to the bottom of the outer shell, the drain pipe is communicated with the first cavity, and a drain outlet is formed in one end, away from the outer shell, of the drain pipe; the buoyancy block is arranged in the second cavity; a valve plate hinged to the drain pipe for closing the drain outlet; and one end of the rope is connected with the buoyancy block, and the other end of the rope is connected with the valve plate.

In the self-cleaning filter equipment provided by the embodiment of the utility model, when the filter screen is blocked and can not be filtered, the water level in the second cavity rises to drive the buoyancy block to rise, the buoyancy block pulls the valve plate through the rope, water and deposited sludge in the shell are discharged from the drain pipe at the bottom, the water level on the upper side of the filter screen also falls along with the water level to reversely wash the filter screen, so that residues and sludge accumulated on the filter screen are discharged from the drain pipe along with the deposited sludge in the shell, the valve plate for sealing the drain pipe is not required to be opened manually, and the filter screen and the automatic sludge discharge can be realized.

In addition, a self-cleaning filter apparatus according to the above-described embodiment of the present utility model may have the following additional technical features.

In some embodiments, the self-cleaning filtration apparatus further comprises a water outlet pipe coupled to the outer sidewall of the outer housing and in communication with the first cavity, a minimum height of the water outlet pipe in an axial direction of the outer housing being greater than a maximum height of the filter screen in an axial direction of the outer housing, a minimum height of the buoyancy block in an axial direction of the outer housing being greater than a minimum height of the water outlet pipe in an axial direction of the outer housing. The water outlet pipe is higher than the filter screen, so that water between the water outlet pipe and the filter screen can be used as backwash water to realize self-cleaning of the filter screen; the buoyancy block is higher than the water outlet pipe, so that the valve plate is prevented from being opened by the buoyancy block rising when the filtering equipment filters normally.

In some embodiments, the screen separates an inner sidewall defining the first cavity into a first inner sidewall and a second inner sidewall coupled to the first inner sidewall, the screen, and an outer wall of the inner housing defining a clean water chamber, the outlet pipe in communication with the clean water chamber; the second inner side wall, the filter screen and the inner wall surface limiting the second cavity define an intake chamber, and the drain pipe is communicated with the intake chamber. The clean water chamber is communicated with the water inlet chamber through the filter screen, so that water is filtered.

In some embodiments, the self-cleaning filtration apparatus further comprises a water blocking device disposed in the water inlet chamber, the water blocking device comprising a connecting shaft and a water blocking plate, the top end of the connecting shaft being fixedly coupled to the support, the bottom end of the connecting shaft being coupled to the water blocking plate. The water baffle can slow down the impact force of intaking, avoids water impact too big so that mud and the residue of intake chamber bottom turn up, and influence the filtration of filter screen.

In some embodiments, a fixing frame for supporting the buoyancy block is arranged on the connecting shaft, the buoyancy block is arranged above the fixing frame, one end, far away from the valve plate, of the rope penetrates through the fixing frame to be connected with the buoyancy block, and the maximum height of the fixing frame in the axial direction of the outer shell is larger than the minimum height of the water outlet pipe in the axial direction of the outer shell. The buoyancy block can be lifted to a certain height through the fixing frame, so that the valve plate is prevented from being opened by lifting the buoyancy block when the filtering equipment normally filters.

In some embodiments, the valve plate has a first end and a second end opposite the first end, the first end is hinged with the drain, a hanging ring is arranged on one side of the valve plate, which is close to the second end and opposite to the drain, and the rope is connected with the hanging ring. The rope is connected to one end opposite to the hinge joint, and is more beneficial to pulling the valve plate to rotate.

In some embodiments, the drain pipe is provided with a third cavity, the third cavity is communicated with the water inlet chamber, a pulley block is arranged on the inner peripheral surface of the third cavity, and a part of the rope is wound on the pulley block. The pulley block is arranged to change the direction of the rope conveniently, prevent the rope from contacting with the inner wall surfaces of the outer shell and the sewage drain pipe, and prolong the service life of the rope.

In some embodiments, an inner peripheral surface defining the third cavity protrudes outwardly at a hinge of the first end with the drain tube to form a recess, the first end being hinged with the drain tube within the recess. The concave part can limit the rotation angle of the valve plate, so that the valve plate can not be closed due to overlarge rotation angle.

In some embodiments, the water deflector further comprises an impeller brush disposed within the water inlet chamber, the impeller brush rotatably coupled to the connecting shaft, the impeller brush comprising a brush that conforms to the filter screen. When water is injected into the water inlet chamber, the impeller cleaning brush can be driven to rotate by the impact force of water, and the filter screen can be brushed by the rotating process brush, so that the self-cleaning of the filter screen is realized.

In some embodiments, the outer housing has legs on its outer side wall. Thereby, the filter device can be firmly fixed.

According to the self-cleaning filtering equipment provided by the embodiment of the utility model, water is injected from the top of the water inlet chamber, water enters the clean water chamber after being filtered by the filter screen, residues and sludge in the water are trapped on the filter screen, when the water level of the clean water chamber is higher than that of the water outlet pipe, the clean water can flow out of the water outlet pipe, the entering water can drive the impeller cleaning brush to rotate, and the rotating process brush also rotates relative to the filter screen, so that the filter screen is cleaned. However, after long-time use, when residues and sludge on the filter screen are retained too much to be filtered, water continuously flows into the water inlet chamber, the water level of the water inlet chamber rises, the buoyancy block floats, the valve plate is pulled to rotate, the valve plate is opened, the deposited sludge at the bottom of the water inlet chamber can be discharged from a sewage outlet of the sewage discharge pipe, the water level of the clean water chamber also falls along with the water level, clean water reserved from the upper part of the filter screen to the water outlet pipe is taken as backwash water, residues and sludge accumulated below the filter screen can be backflushed, and the clean water and the sludge deposited at the bottom of the water inlet chamber are discharged together through the sewage discharge pipe, so that the self cleaning of the filter screen is realized. After the filter screen is blocked, the valve plate does not need to be manually controlled to be opened or closed, the filter screen does not need to be manually replaced or cleaned, and the filter screen is simple in structure, convenient to operate, high in practicality and high in efficiency.

Drawings

Other features and advantages of the utility model are seen in the following description, which explains the utility model in more detail on the basis of embodiments with reference to the drawings.

Fig. 1 is a cross-sectional view of a self-cleaning filter apparatus according to an embodiment of the present utility model.

Fig. 2 is a partial enlarged view of the portion a of fig. 1.

Fig. 3 is a partial enlarged view of part B of fig. 1.

Fig. 4 is a partial enlarged view of the portion C of fig. 1.

Fig. 5 is a top view (with the screen omitted) of a self-cleaning filter apparatus according to an embodiment of the present utility model.

Reference numerals illustrate:

self-cleaning filtration apparatus 100;

an outer housing 110, a first cavity 111, a top 112, an inner side wall 113, a first inner side wall 1131, a second inner side wall 1132, an outer side wall 114, a bottom 115;

brackets 120, cross members 121, stringers 122;

an inner housing 130, a second chamber 131, an inner wall surface 132, and an outer wall surface 133;

a screen 140;

drain 150, drain 151, third cavity 152, inner perimeter 1521, recess 153, right wall 1531, standpipe 154, left cavity 1541, cross tube 155;

a buoyancy block 160;

valve plate 170, first end 171, second end 172, inner side 173, suspension ring 174;

a rope 180, an upper end 181, a lower end 182;

a water outlet pipe 190;

a clean water chamber 10; a water inlet chamber 20;

the water retaining device 30, the connecting shaft 31, the top end 311, the bottom end 312, the water retaining plate 32, the fixing frame 33, the cross rod 331, the longitudinal rod 332, the bearing 34 and the supporting plate 35;

impeller cleaning brush 40, brush 41, impeller blade 42;

pulley block 50, left fixed pulley 51, right fixed pulley 52;

legs 60, fixing plates 61.

Detailed Description

Preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower", "left", "right", "front", "rear" and the like are used herein for illustrative purposes only and are not limiting of the present utility model.

Referring to fig. 1, an embodiment of the present utility model provides a self-cleaning filter apparatus 100 including an outer housing 110, the outer housing 110 having a lower cavity 111 (as an example of a first cavity); a bracket 120, the bracket 120 being detachably coupled to the top 112 of the outer case 110; an inner case 130, the inner case 130 being coupled with the bracket 120 and accommodated in the lower cavity 111, the inner case 130 having an upper cavity 131 (as an example of a second cavity) communicating with the lower cavity 111; the filter screen 140, one end of the filter screen 140 is coupled with the inner case 130, and the other end of the filter screen 140 is coupled with the inner sidewall 113 defining the lower cavity 111; a drain pipe 150, the drain pipe 150 being coupled to the bottom 115 of the outer case 110, the drain pipe 150 being in communication with the lower cavity 111, one end of the drain pipe 150 remote from the outer case 110 being provided with a drain outlet 151; the buoyancy block 160, the buoyancy block 160 is disposed in the upper cavity 131; valve plate 170, valve plate 170 being hinged to drain 150, valve plate 170 being adapted to close drain 151; a rope 180, an upper end 181 of the rope 180 being coupled to the bottom of the buoyancy block 160, and a lower end 182 of the rope 180 being coupled to the inner side 173 of the valve plate 170.

As shown in fig. 1, the self-cleaning filter apparatus 100 further includes a water outlet pipe 190, the water outlet pipe 190 being coupled to the outer sidewall 114 of the outer housing 110, the water outlet pipe 190 being in communication with the lower chamber 111, a minimum height of the water outlet pipe 190 in an axial direction of the outer housing 110 being greater than a maximum height of the filter screen 140 in an axial direction of the outer housing 110, and a minimum height of the buoyancy block 160 in an axial direction of the outer housing 110 being greater than a minimum height of the water outlet pipe 190 in an axial direction of the outer housing 110.

As shown in fig. 1, the screen 140 divides the inner side wall 113 defining the lower cavity 111 into an upper inner side wall 1131 and a lower inner side wall 1132 fixedly coupled to the upper inner side wall 1131, i.e., the upper inner side wall 1131 is above the screen 140 and the lower inner side wall 1132 is below the screen 140. The upper inner sidewall 1131, the upper surface of the filter screen 140 and the outer wall surface 133 of the inner housing 130 define the clean water chamber 10, and the water outlet pipe 190 communicates with the clean water chamber 10; the lower inner sidewall 1132, the lower surface of the screen 140, and the inner wall surface 132 defining the upper chamber 131 define the intake chamber 20, and the drain 150 communicates with the intake chamber 20.

As shown in fig. 1, the self-cleaning filtering apparatus 100 further includes a water blocking device 30, the water blocking device 30 is disposed in the water inlet chamber 20, the water blocking device 30 is of a hollow structure, an inner cavity of the water blocking chamber 30 is communicated with the water inlet chamber 20, the water blocking device 30 can buffer water entering the water inlet chamber 20, and the excessive impact is avoided so that sludge accumulated at the bottom of the water inlet chamber 20 is turned up. The water blocking device 30 includes a connection shaft 31 and a water blocking plate 32, a top end 311 of the connection shaft 31 is fixedly coupled to the bracket 120, and a bottom end 312 of the connection shaft 31 is coupled to the water blocking plate 32.

As shown in fig. 1 and 4, a fixing frame 33 for supporting a buoyancy block 160 is provided on the connection shaft 31, the buoyancy block 160 is provided above the fixing frame 33, and an upper end 181 of a rope 180 is coupled with the buoyancy block 160 through the fixing frame 33.

As shown in fig. 4, the connection shaft 31 is a hollow circular tube having an outer diameter smaller than an inner diameter of the inner housing 140. The fixing frame 33 includes a vertical rod 331 and a cross rod 332, the vertical rod 331 is connected with the cross rod 332 in a T shape, a through hole penetrating through the vertical rod 331 is formed in the center of the upper end face of the vertical rod 331, the vertical rod 331 may be a hollow circular tube, the left end of the cross rod 332 is fixedly connected with the vertical rod 331, and the right end of the cross rod 332 is connected with the inner peripheral face of the connecting shaft 31. The buoyancy block 160 is disposed in the inner cavity of the connecting shaft 31, and the upper end 181 of the rope 180 passes through the central hole of the longitudinal rod 331 of the fixing frame 33 and is connected with the bottom of the buoyancy block 160. In an initial state, that is, when the buoyancy block 160 is not floating, the bottom of the buoyancy block 160 is in contact with the upper end surface of the vertical rod 331 of the fixing frame 33, that is, the height of the upper end surface of the vertical rod 331 is higher than the minimum height of the water outlet pipe 190 in the vertical direction.

As shown in fig. 3, valve plate 170 has an upper end 171 (as an example of a first end) and a lower end 172 (as an example of a second end) opposite upper end 171, upper end 171 being hinged to drain 150, a lifting ring 174 being provided on an inner side 173 of valve plate 170 proximate to lower end 1722, and lower end 182 of cord 180 being coupled to lifting ring 174.

As shown in fig. 3, the drain pipe 150 includes a hollow standpipe 154 and a hollow lateral pipe 155, the standpipe 154 is the same as the lateral pipe 155 in pipe diameter, the standpipe 154 is disposed in a vertical direction, and the lateral pipe 155 is disposed in a horizontal direction. The top end of the standpipe 154 is connected to the bottom 115 of the outer housing 110 and communicates with the interior cavity of the standpipe 154 and the intake chamber 20, the bottom end of the standpipe 154 is connected to the left end of the cross tube 155, and the interior cavity of the standpipe 154 communicates with the interior cavity of the cross tube 155. The drain pipe 150 has a right cavity 152 (as an example of a third cavity) and a left cavity 154 in communication with the right cavity 152, it being understood that the left cavity 154 is an interior of the standpipe 154, the right cavity 152 is an interior of the cross pipe 155, and the right cavity 152 is in communication with the intake chamber 20 through the standpipe 154.

As shown in fig. 1 and 3, the pulley block 50 is disposed on the inner circumferential surface 1521 of the right cavity 152 of the drain pipe 150, and a portion of the rope 180 is wound around the pulley block 50. The pulley block 50 includes 2 sets of fixed pulleys, namely a left fixed pulley 51 and a right fixed pulley 52, which are arranged at intervals, the left fixed pulley 51 and the right fixed pulley 52 are arranged above the central axis of the transverse pipe 155 of the sewage pipe 150, the left fixed pulley 51 is arranged at one end of the inner peripheral surface 1521 of the right cavity 152, which is close to the standpipe 154, the right fixed pulley 52 is arranged at the middle position of the inner peripheral surface 1521 of the right cavity 152, the lower end 182 of the rope 180 is wound to the upper end of the right fixed pulley 52 through the left end and the bottom end of the left fixed pulley 51 and then connected with the hanging ring 174 on the valve plate 170, namely the rope 180 is tangent with the left end and the bottom end of the left fixed pulley 51 and tangent with the upper end of the right fixed pulley 52. Thus, the rope 180 can be prevented from contacting the inner wall surface of the drain pipe 150. In other embodiments, the pulley block 50 may also include a plurality of fixed pulleys, through which the rope 180 is wound and connected at one end to the buoyancy block 160 and at the other end to the valve plate 170.

An inner circumferential surface 1521 defining the right chamber 152 protrudes upward in a vertical direction to form a recess 153 at a hinge of the upper end 171 of the valve plate 170 with the drain pipe 150, and the valve plate 170 is hinged with the drain pipe 150 in the recess 153.

In some embodiments, recess 153 includes a right wall 1531 and valve plate 170 is parallel to right wall 1531 when valve plate 170 closes drain 151. The right wall surface 1531 of the recess 153 is provided with an ear plate for hinge connection, and the upper end 171 of the valve plate 170 is hinged to the ear plate on the right wall surface 1531 of the recess 153 by a hinge shaft.

In some embodiments, valve plate 170 is a circular thin plate, the outer diameter of valve plate 170 is greater than the inner diameter of drain 151, the inner diameter of drain 151 is less than the inner diameter of drain 150, lower end 172 of valve plate 170 is not in contact with inner circumferential surface 1521 of right cavity 152, and a seal is provided at the junction of valve plate 170 and drain 151.

In some embodiments, buoyancy block 160 is a block machined from a solid buoyancy material into a particular shape. The buoyancy block 160 may be a cuboid or a cube.

In some embodiments, when the water level in the water inlet chamber 20 rises, the water level in the inner cavity of the water blocking device 30 also rises, the buoyancy block 160 floats, and the pulling force of the buoyancy block 160 on the rope 180 is greater than the impact force of water on the valve plate 170 when the buoyancy block 160 floats, so that the valve plate 170 is opened, and the water and the sludge in the water inlet chamber 20 can be discharged from the drain outlet 151 of the drain pipe 150.

In some embodiments, as shown in FIG. 1, the rope 180 is in an initial state, i.e., when the buoyancy block 160 is not raised. The rope 180 is divided into three sections, a left section extending in a vertical direction, a middle section extending in a horizontal direction, and a right section inclined toward the lower end 172 of the valve plate 170.

In some embodiments, as shown in fig. 1, the self-cleaning filtration apparatus 100 further comprises an impeller brush 40, the impeller brush 40 being disposed within the intake chamber 20, the impeller brush 40 being rotatably coupled to the connecting shaft 31, the impeller brush 40 comprising a brush 41, the brush 41 being in engagement with the screen 140.

As shown in fig. 1 and 2, the water blocking device 30 further includes a bearing 34 and a support plate 35, the support plate 35 is fixedly coupled to the outer circumferential surface of the connection shaft 31, the bearing 34 is sleeved on the connection shaft 31, and the support plate 35 is used for supporting the fixed bearing 34, i.e., the lower surface of the bearing 34 is fixedly coupled to the upper surface of the support plate 35.

In this embodiment, the bearing 34 is a micro planar bearing, which may be a planar bearing with needle rollers or a planar bearing with balls, and has strong rust and corrosion resistance. The bearing 34 comprises a tightening ring and a loosening ring, as shown in fig. 2, an upper ring of the bearing 34 is a loosening ring, a lower ring of the bearing 34 is a tightening ring, and a needle roller or a steel ball with a retainer is arranged between the upper ring and the lower ring. The tight ring is in transition fit with the connecting shaft 31 and fixedly connected with the supporting plate 35, and the loose ring is in clearance fit with the connecting shaft 31, namely, the upper ring of the bearing 34 can rotate relative to the connecting shaft 31.

As shown in fig. 1 and 2, the impeller brush 40 is disposed in the intake chamber 20, and the impeller brush 40 further includes a plurality of impeller blades 42 disposed at equal intervals along the circumferential direction of the connecting shaft 31, and the impeller blades 42 may be flat blades, circular arc blades or wing blades. The bottom of the impeller blade 42 is fixedly coupled with the upper surface of the bearing 34, i.e., the impeller blade 42 is provided on the loose ring of the bearing 34, one end of the impeller blade 42 close to the connection shaft 31 is not in contact with the outer circumferential surface of the connection shaft 31, and one end of the impeller blade 42 remote from the connection shaft 31 is not in contact with the inner sidewall 113 of the outer housing 110, whereby the impeller blade 42 is rotatable with respect to the connection shaft 31. After water is injected into the water inlet chamber 20, the impeller blades 42 can convert the kinetic energy of the water into mechanical energy of the impeller blades 42 under the impact of the water, so as to drive the impeller blades 42 to slightly rotate around the connecting shaft 31. Since the brush 41 is disposed on the upper surface of the impeller blades 42 and the brush 42 is closely attached to the filter screen 140, the filter screen 140 can be brushed by the brush 41 when the impeller blades 42 rotate.

As shown in fig. 1, the outer case 110 is a tank with an open top, and the outer case 110 includes an upper portion and a lower portion, the upper portion having a rectangular longitudinal section, and the lower portion having an inverted triangular longitudinal section. In this embodiment, the upper portion of the outer housing 110 is a hollow cylinder, the lower portion is a hollow cone, and the cross section of the upper portion is the same as the upper end surface of the lower portion. In other embodiments, the upper portion of the outer housing 110 is a hollow prism and the lower portion is a hollow pyramid.

As shown in fig. 1, the top and bottom of the inner case 130 are open, and it is understood that the inner case 130 has a hollow rectangular cross section. In this embodiment, the inner housing 130 is a hollow cylinder. In other embodiments, the inner housing 130 may be a hollow prism.

In some embodiments, as shown in fig. 1, the water guard 32 has a tapered structure with a smaller top and a larger bottom, and the bottom end of the water guard 32 is not in contact with the inner sidewall 113 of the outer housing 110, and it is understood that the maximum size of the periphery of the water guard 32 is smaller than the minimum size of the cross section of the outer housing 110 on the surface where the bottom of the water guard 32 is located. In the present embodiment, the area of the bottom of the water deflector 32 is larger than the maximum area of the bottom of the inner housing 130, i.e., the projection of the water deflector 32 onto the horizontal plane covers the projection of the inner housing 130 onto the horizontal plane. Therefore, the impact force of water inflow is more favorably slowed down.

In some embodiments, the support plate 35 is an annular plate or a square plate with a center hole, and an inner circumferential surface of the support plate 35 is fixedly coupled with an outer circumferential surface of the connection shaft 31.

In some embodiments, the outer diameter of the bearing 34 is less than the smallest dimension of the interior of the inner housing 130, and the outer peripheral dimension of the support plate 35 is no greater than the outer diameter of the bearing 34.

As shown in fig. 1 and 3, the bracket 120 includes two parallel and oppositely disposed cross members 121 and a longitudinal beam 122 disposed between the two cross members 121, and the bottom surface of the cross member 121 is coupled with the top 112 of the bracket 120. The bracket 120 is formed by welding two cross beams 121 and a longitudinal beam 122 in an H shape, two ends of the longitudinal beam 122 are respectively and vertically connected with the two cross beams 121, and the two cross beams 121 are symmetrically arranged about the central axis of the outer shell 110. The top of the inner case 130 is coupled to the bottom surfaces of the two cross members 121. The cross members 121 and stringers 122 may be square tubes, angle steel or other profiles.

The filter screen 140 is a net structure, the mesh number of the filter screen 140 can be determined according to the filter precision requirement, and the larger the mesh number is, the higher the filter precision is. In this embodiment. As shown in fig. 1, the filter screen 140 has a circular ring shape, and one end of the filter screen 140, which is close to the inner housing 130, is fixedly coupled to the bottom of the inner housing 130; the outer circumferential surface of the screen 140 is coupled with the inner sidewall 113 of the outer case 110. In other embodiments, the filter 140 may be hollow and tapered with openings at the top and bottom, i.e. the angle between the filter 140 and the outer wall 133 of the inner housing 130 is greater than 0 degrees and less than 180 degrees.

In some embodiments, a sealing member is provided at the connection between the filter screen 140 and the inner housing 130, and a sealing member is also provided at the connection between the filter screen 140 and the inner sidewall 113 of the outer housing 110, so as to prevent water from entering the clean water chamber 10 without being filtered, thereby affecting the filtering effect.

In the present embodiment, as shown in fig. 1, a gap is provided between the outer peripheral surface of the connection shaft 31 and the inner wall surface 132 of the inner housing 130, and a gap is provided between the outer wall surface of the water deflector 32 and the lower inner sidewall 1132. Thus, water injected from the top of the intake chamber 20 may flow toward the bottom of the intake chamber 20.

In some embodiments, the central axis of the outer housing 110, the central axis of the inner housing 140, the central axis of the water deflector 160, the central axis of the impeller brush 40, and the central axis of the screen 140 are collinear.

In some embodiments, as shown in fig. 1 and 5, the outer side wall 114 of the outer case 110 near the bottom 115 is provided with the leg 60, the bottom of the leg 60 is fixedly coupled with the fixing plate 61, and the fixing plate 61 is provided with a through hole for passing through the anchor bolt, thereby ensuring that the self-cleaning filtering apparatus 100 is stably fixed on the ground. In the present embodiment, four legs 60 are provided on the self-cleaning filtering apparatus 100, the four legs 60 are uniformly coupled to the outer sidewall 114 of the outer housing 110 around the central axis of the outer housing 110, the tops of the legs 60 are coupled to the coupling portions of the upper and lower portions of the outer housing 110, the legs 60 include a stand column and a diagonal column fixedly coupled to the stand column, and the diagonal column is inclined toward the outer housing 110, whereby the contact area of the legs 60 with the outer housing 110 can be increased, making the legs 60 more stable.

The self-cleaning filter apparatus 100 according to the present utility model is described below. As shown in fig. 1 to 4, the self-cleaning filter apparatus 100 includes an outer housing 110, a bracket 120, an inner housing 130, a filter screen 140, a drain pipe 150, a buoyancy block 160, a valve plate 170, a rope 180, a water outlet pipe 190, a water blocking device 30, and an impeller brush 40. The self-cleaning filter apparatus 100 is classified into a filtering state and a cleaning state. In the filtering state, the valve plate 170 is closed, namely, the valve plate 170 seals the drain outlet of the drain pipe 150, water is injected from the top of the water inlet chamber 20, flows to the bottom of the water inlet chamber 20 after being buffered by the water baffle of the water baffle device 30, when the water level of the water inlet chamber 20 is higher than that of the filter screen 140, the water enters the clean water chamber 10 after being filtered by the filter screen 140, and part of residues and sludge are retained on the filter screen 140; when the water level of the clean water chamber 10 is higher than the water outlet pipe 190, clean water can be discharged from the water outlet pipe 190 to enter the next stage, and the water level of the clean water chamber 10 is equal to the water level of the water inlet chamber 20 during normal filtration. In the cleaning state, water is continuously introduced into the water inlet chamber 20, since the filter screen 140 is blocked by residues and sludge after long-time use, the water inlet amount of the water inlet chamber 20 is larger than the water outlet amount of the clean water chamber 10, the water level of the water inlet chamber 20 rises, the buoyancy block 160 arranged in the water inlet chamber 10 floats, the valve plate 170 is opened, water in the water inlet chamber 20 and sludge deposited at the bottom are discharged from the drain pipe 150, and water stored in the clean water chamber 10 reversely flows into the water inlet chamber 20 through the filter screen 140, so that residues and sludge deposited below the filter screen 140 are backflushed, and the water in the water inlet chamber 20 and the sludge deposited at the bottom are discharged through the drain pipe 150 together, thereby realizing self-cleaning of the filter screen 140. When the water flow in the water inlet chamber 20 gradually descends, the buoyancy block 160 returns to the original state, and the valve plate 170 is closed under the impact of the water flow, thereby completing the self-cleaning of the filter screen 140.

The self-cleaning filter equipment of the embodiment does not need to manually control the opening and closing of the valve plate, and can realize full-automatic cleaning of the filter screen. Simple structure, convenient operation and practicality are strong.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A self-cleaning filtration apparatus comprising:

-an outer housing (110), the outer housing (110) having a first cavity (111);

-a bracket (120), the bracket (120) being detachably coupled to the top (112) of the outer housing (110);

an inner housing (130), the inner housing (130) being coupled with the bracket (120) and being accommodated within the first cavity (111), the inner housing (130) having a second cavity (131) communicating with the first cavity (111);

-a screen (140), one end of the screen (140) being coupled to the inner housing (130), the other end of the screen (140) being coupled to an inner side wall (113) defining the first cavity (111);

a drain pipe (150), the drain pipe (150) is coupled to the bottom (115) of the outer housing (110), the drain pipe (150) is communicated with the first cavity (111), and a drain outlet (151) is arranged at one end of the drain pipe (150) away from the outer housing (110);

a buoyancy block (160), the buoyancy block (160) being disposed within the second cavity (131);

a valve plate (170), the valve plate (170) being hinged to the drain pipe (150) for closing the drain outlet (151); and

a rope (180), one end of the rope (180) is coupled with the buoyancy block (160), and the other end of the rope (180) is coupled with the valve plate (170).

2. The self-cleaning filtration device of claim 1, further comprising a water outlet pipe (190), the water outlet pipe (190) being coupled to an outer sidewall (114) of the outer housing (110) and in communication with the first cavity (111), a minimum height of the water outlet pipe (190) in an axial direction of the outer housing (110) being greater than a maximum height of the screen (140) in an axial direction of the outer housing (110), a minimum height of the buoyancy block (160) in an axial direction of the outer housing (110) being greater than a minimum height of the water outlet pipe (190) in an axial direction of the outer housing (110).

3. The self-cleaning filtration device of claim 2, wherein the screen (140) separates an inner sidewall (113) defining the first cavity (111) into a first inner sidewall (1131) and a second inner sidewall (1132) coupled to the first inner sidewall (1131), the screen (140), and an outer wall surface (133) of the inner housing (130) defining a clean water chamber (10), the outlet pipe (190) communicating with the clean water chamber (10); the second inner side wall (1132), the filter screen (140) and the inner wall surface (132) defining the second cavity (131) define an intake chamber (20), and the drain pipe (150) is communicated with the intake chamber (20).

4. A self-cleaning filtration device according to claim 3, further comprising a water deflector (30), said water deflector (30) being provided in said intake chamber (20), said water deflector (30) comprising a connecting shaft (31) and a water deflector (32), a top end (311) of said connecting shaft (31) being fixedly coupled to said bracket (120), a bottom end (312) of said connecting shaft (31) being coupled to said water deflector (32).

5. The self-cleaning filter apparatus according to claim 4, wherein a fixing frame (33) for supporting the buoyancy block (160) is provided on the connecting shaft (31), the buoyancy block (160) is provided above the fixing frame (33), and an end of the rope (180) away from the valve plate (170) is coupled with the buoyancy block (160) through the fixing frame (33).

6. The self-cleaning filtration device of claim 5, wherein the valve plate (170) has a first end (171) and a second end (172) opposite the first end (171), the first end (171) being hinged to the drain (150), a lifting ring (174) being provided on an inner side (173) of the valve plate (170) proximate the second end (172), the rope (180) being coupled to the lifting ring (174).

7. The self-cleaning filtration device of claim 6, wherein the drain pipe (150) has a third cavity (152), the third cavity (152) being in communication with the intake chamber (20), a pulley block (50) being provided on an inner circumferential surface (1521) defining the third cavity (152), a portion of the rope (180) being wound around the pulley block (50).

8. The self-cleaning filter apparatus according to claim 7, wherein an inner peripheral surface (1521) defining said third cavity (152) protrudes outwardly forming a recess (153) at a hinge of said first end (171) with said drain (150), said first end (171) being hinged with said drain (150) within said recess (153).

9. The self-cleaning filtration device of claim 8, further comprising an impeller brush (40), the impeller brush (40) being disposed within the intake chamber (20), the impeller brush (40) being rotatably coupled to the connecting shaft (31), the impeller brush (40) comprising a brush (41), the brush (41) conforming to the filter screen (140).

10. Self-cleaning filter device according to claim 9, characterized in that the outer side wall (114) of the outer housing (110) is provided with legs (60).