CN111747549A - Shallow sand filter and use method thereof - Google Patents

Abstract

The invention discloses a shallow sand filter and a use method thereof, belonging to the technical field of filters. Can realize that simple structure is practical, the operation of being convenient for, convenient to use, the filter effect is good, can effectually avoid filter screen blocking, be convenient for take out by filterable impurity, and when intraductal atmospheric pressure was too big, can carry out the pressure release automatically.

Description

Shallow sand filter and use method thereof

Technical Field

The invention relates to the field of filters, in particular to a shallow sand filter and a using method thereof.

Background

The shallow sand filter is a medium filter system, and utilizes the medium to remove various suspended matters, microorganisms and other fine particles in water, so as to finally achieve the effects of reducing water turbidity and purifying water quality.

The filtering holes of the filter screen are easily blocked by sand and stone in the existing shallow sand filter, so that the filter screen is easily partially blocked, the filtering efficiency is low, impurities are filtered, the impurities are not convenient to clean, and the impurities after precipitation easily cause the problem of blockage. Therefore, we propose a shallow sand filter and method of use.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a shallow sand filter and a using method thereof, which have the advantages of simple and practical structure, convenience in operation and use, good filtering effect, capability of effectively avoiding the blockage of a filter screen, convenience in taking out filtered impurities and capability of automatically relieving pressure when the air pressure in a pipe is too high.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A shallow sand filter comprises a tank body, wherein a support frame is fixedly mounted on the outer wall of the bottom of the tank body, a water inlet pipe is communicated with the outer wall of the top of the tank body, a water outlet pipe is communicated with the outer wall of the bottom of the tank body, an exhaust pipe is communicated with the outer wall of the top of the tank body and positioned on the right side of the water inlet pipe, first bearings are fixedly mounted on the inner walls of the front side and the rear side of the tank body respectively, a rotating shaft is movably mounted between the first bearings, a disc is fixedly connected onto the outer wall of the rotating shaft, a plurality of blades which are uniformly distributed in an annular shape are fixedly connected onto the outer wall of the side surface of the disc, a swinging rod is fixedly connected onto the outer wall of one side of the front surface of the disc, a piston plate is movably mounted below the disc, a filter screen is fixedly mounted in the middle of, the top fixed mounting of fixed block has the montant, the top fixed mounting of montant has the dog, the cover is equipped with first spring on the outer wall of montant, the top fixedly connected with gangbar of piston plate.

Fixed mounting has the go-between on the inner wall of filter screen bottom, the inside movable mounting of go-between has the collecting vessel, fixedly connected with screw ring on the outer wall of collecting vessel, the left and right sides of collecting vessel all is equipped with sets up the inside slot at screw ring, fixed mounting has the horizontal pole on the inner wall of collecting vessel, the thread groove has been seted up at the middle part of horizontal pole, it has the connecting pipe to just be located the intercommunication between inlet tube and the blast pipe on the top outer wall of the jar body, the top threaded connection of connecting pipe has the tube cap, the left and right sides of connecting pipe all is equipped with the locating lever on the outer wall of fixed mounting jar.

The exhaust pipe is characterized in that a baffle is fixedly mounted on the inner wall of the exhaust pipe, a circulation hole is formed in the middle of the baffle, a fixed plate is fixedly mounted on the inner wall of the exhaust pipe and above the baffle, an adjusting block is fixedly mounted on the outer wall of the bottom of the fixed plate, an adjusting groove is formed in the adjusting block, a plunger is movably mounted in the adjusting groove, and a second spring is connected between the plunger and the inner wall of the adjusting groove.

Furthermore, the outer walls of the water inlet pipe and the water outlet pipe are respectively provided with a valve, and two ends of the rotating shaft are respectively fixedly connected with the inner walls of the two first bearing inner rings.

Further, the montant runs through the piston board and its sliding connection, first spring is located between piston board and the fixed block, swinging arms and gangbar sliding connection, threaded ring and go-between threaded connection, the setting of threaded ring, go-between makes the rotation threaded ring make the threaded ring break away from the go-between, can take off the collecting vessel, through the setting of first bearing, pivot, disc, blade, swinging arms, piston board, filter screen, sewage gets into the jar body through the inlet tube after, can strike the blade, drive the disc anticlockwise rotation, and then drive the intermittent type nature of swinging arms and extrude the gangbar downwards, the setting of cooperation fixed block, montant, dog, first spring, under the effect of first spring elasticity, make the piston board drive the intermittent type nature emergence vibration of filter screen, tremble the impurity of jam in the filter screen, avoid the filter screen to block up, and sliding the filtered impurities into the collection bucket.

Further, the filter screen is conical, the top of collecting vessel is the opening form, be provided with the screw thread on the inner wall of thread groove, the setting of collecting vessel for be convenient for collect by filterable impurity.

Further, fixed mounting has the active carbon adsorption net on the inner wall of jar body, the active carbon adsorption net is located the below of collecting vessel, and the active carbon adsorption net adsorbs the sewage after filtering, improves the filter effect.

Further, the plunger runs through the adjustment tank, and plunger and circulation hole sliding connection, fixedly connected with sealing ring on the outer wall of plunger, the sealing ring pastes with the baffle mutually, and the setting of sealing ring can guarantee the leakproofness of the junction of plunger and adjustment tank, through the setting of baffle, circulation hole, fixed plate, regulating block, adjustment tank, plunger, second spring, when jar internal gas pressure was too big, atmospheric pressure can upwards push up the plunger, makes the circulation hole switch on, and then makes the blast pipe switch on, and gas is from circulation hole, small opening, blast pipe discharge to automatically carry out the pressure release, avoid jar internal gas pressure too big, treat that atmospheric pressure descends, under the effect of second spring elasticity, can make plunger automatic re-setting.

Furthermore, a plurality of leakage holes are formed in the fixing plate.

A use method of a shallow sand filter comprises the following steps:

s1, communicating a water inlet pipe with a sewage discharge pipeline, communicating a water outlet pipe with a drainage pipeline, and opening valves on the water inlet pipe and the water outlet pipe;

s2, sewage enters the tank body through a water inlet pipe, a filter screen filters the sewage, an active carbon adsorption net adsorbs the sewage, and the filtered and adsorbed sewage is discharged through a water outlet pipe;

s3, when sewage enters the tank body, the blades are impacted, the disc is driven to rotate anticlockwise, the oscillating rod intermittently extrudes the linkage rod downwards, the filter screen intermittently vibrates, the filter screen is prevented from being blocked, and filtered impurities slide into the collecting barrel;

s4, when the air pressure in the tank body is too high, the air pressure pushes the plunger upwards to enable the circulation hole to be communicated, the exhaust pipe is further communicated, the gas is discharged from the circulation hole, the leakage hole and the exhaust pipe, and the plunger can be automatically reset under the action of the elastic force of the second spring after the air pressure is reduced;

s5, when the impurities are cleaned and filtered, the valves on the water inlet pipe and the water outlet pipe are closed, the pipe cover is unscrewed, and the collecting barrel is taken out by using the material taking device, so that the filtered impurities can be taken out.

Further, extracting device includes the handle, fixedly connected with second bearing on the outer wall of handle, fixedly connected with holding ring on the outer wall of second bearing outer lane, the bottom fixedly connected with connecting rod of handle, the one end fixedly connected with U type pole of handle is kept away from to the connecting rod, the left and right sides of second bearing all is equipped with the locating hole of seting up in the holding ring inside, the inside threaded connection of handle has the screw rod.

Furthermore, the size of locating hole and locating lever looks adaptation, the screw rod and thread groove looks adaptation, U type pole and slot looks adaptation, the screw rod runs through connecting rod and U type pole.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) this scheme is through first bearing, the apparatus further comprises a rotating shaft, the disc, the blade, the swinging arms, the piston board, the setting of filter screen, sewage gets into jar body back through the inlet tube, can strike the blade, drive disc anticlockwise rotation, and then drive swinging arms intermittent type nature's downward extrusion gangbar, the cooperation fixed block, the montant, the dog, the setting of first spring, under the effect of first spring elasticity, make the piston board drive filter screen intermittent type nature's emergence vibration, tremble out the impurity of jam in the filter screen filter hole, avoid filter screen blocking.

(2) Through the arrangement of the filter screen and the collecting barrel, the filtered impurities can slide into the collecting barrel along the filter screen, so that the filtered impurities can be conveniently collected.

(3) The arrangement of the activated carbon adsorption net enables the activated carbon adsorption net to adsorb the filtered sewage, and the filtering effect is improved.

(4) Through the setting of baffle, opening, fixed plate, regulating block, adjustment tank, plunger, second spring, when jar internal portion atmospheric pressure was too big, atmospheric pressure can upwards push up and move the plunger, makes the opening switch on, and then makes the blast pipe switch on, and gaseous from opening, small opening, blast pipe discharge to automatically, carry out the pressure release, avoid jar internal portion atmospheric pressure too big, improved the practicality.

(5) Through the handle, the second bearing, the holding ring, the connecting rod, U type pole, the screw rod, the locating hole, the connecting pipe, the tube cap, the setting of locating lever, unscrew the tube cap, it passes U type pole to remove the handle, the connecting rod inserts the jar body, and make the locating lever insert the locating hole, U type pole inserts the slot, it makes screw rod and thread groove be connected to twist to move the screw rod, the twist grip, it rotates to drive the screw ring through connecting rod and U type pole, make the screw ring break away from the go-between, it can take out the collecting vessel to lift the handle, and then take out by filterable impurity, the messenger is convenient for take out by filterable impurity, and.

Drawings

FIG. 1 is a cross-sectional view of the interior of a can body of the present invention;

FIG. 2 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;

FIG. 3 is an enlarged view taken at B of FIG. 1 in accordance with the present invention;

FIG. 4 is a side view of the present invention at the spindle;

FIG. 5 is a top view of the present invention at the piston plate;

FIG. 6 is a cross-sectional view of the interior of the exhaust pipe of the present invention;

FIG. 7 is a cross-sectional view of the interior of the conditioning block of the present invention;

FIG. 8 is a bottom view of the invention at the fixation plate;

FIG. 9 is a schematic view of a material extracting apparatus according to the present invention;

fig. 10 is a top view of the retaining ring of the present invention.

The reference numbers in the figures illustrate:

101. a tank body; 102. a support frame; 103. a water inlet pipe; 104. a water outlet pipe; 105. an exhaust pipe; 106. a first bearing; 107. a rotating shaft; 108. a disc; 109. a blade; 110. a swing lever; 111. a piston plate; 112. a filter screen; 113. a fixed block; 114. a vertical rod; 115. a stopper; 116. a first spring; 117. a connecting ring; 118. a collection barrel; 119. a threaded ring; 120. a slot; 121. a cross bar; 122. a thread groove; 123. a connecting pipe; 124. a tube cover; 125. positioning a rod; 126. a baffle plate; 127. a flow-through hole; 128. a fixing plate; 129. an adjusting block; 130. an adjustment groove; 131. a plunger; 132. a second spring; 133. a leak hole; 134. an activated carbon adsorption net; 135. a linkage rod; 136. a seal ring; 201. a handle; 202. a second bearing; 203. a positioning ring; 204. a connecting rod; 205. a U-shaped rod; 206. a screw; 207. and (7) positioning the holes.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-2 and 4-5, a shallow sand filter comprises a tank 101, a support frame 102 is fixedly mounted on the outer wall of the bottom of the tank 101, a water inlet pipe 103 is communicated with the outer wall of the top of the tank 101, a water outlet pipe 104 is communicated with the outer wall of the bottom of the tank 101, an exhaust pipe 105 is communicated with the outer wall of the top of the tank 101 and positioned on the right side of the water inlet pipe 103, first bearings 106 are fixedly mounted on the inner walls of the front and rear sides of the tank 101, a rotating shaft 107 is movably mounted between the first bearings 106, valves are arranged on the outer walls of the water inlet pipe 103 and the water outlet pipe 104, two ends of the rotating shaft 107 are respectively fixedly connected with the inner walls of the inner rings of the two first bearings 106, a disc 108 is fixedly connected to the outer wall of the rotating shaft 107, a plurality of blades 109 uniformly distributed in an annular shape are fixedly connected to the outer wall of the side of, make the sewage that inlet tube 103 got into, can strike blade 109, and then drive disc 108 and rotate, fixedly connected with swinging arms 110 on the outer wall of the positive one side of disc 108, swinging arms 110 is located the left side below of disc 108 center department, the below movable mounting of disc 108 has piston board 111, the middle part fixed mounting of piston board 111 has filter screen 112, equal fixed mounting has fixed block 113 on the inner wall of the jar body 101 left and right sides, fixed block 113 is located the below of piston board 111, the top fixed mounting of fixed block 113 has montant 114, the top fixed mounting of montant 114 has dog 115, the cover is equipped with first spring 116 on the outer wall of montant 114, the top fixedly connected with gangbar 135 of piston board 111.

Referring to fig. 1, 3 and 5, a connection ring 117 is fixedly installed on an inner wall of a bottom end of a filter screen 112, a collection barrel 118 is movably installed inside the connection ring 117, the filter screen 112 is conical, a top end of the collection barrel 118 is open, threads are arranged on an inner wall of a thread groove 122, the collection barrel 118 is arranged to facilitate collection of filtered impurities, an activated carbon adsorption net 134 is fixedly installed on an inner wall of a tank body 101, the activated carbon adsorption net 134 is located below the collection barrel 118, the activated carbon adsorption net 134 adsorbs filtered sewage to improve a filtering effect, a vertical rod 114 penetrates through a piston plate 111 and is in sliding connection with the piston plate 111, a first spring 116 is located between the piston plate 111 and a fixed block 113, a swing rod 110 is in sliding connection with a linkage rod 135, a threaded ring 119 is in threaded connection with the connection ring 117, and the threaded rings 119 and 117 are arranged to enable the threaded ring 119 to be rotated to separate the threaded ring 119 from the connection ring, namely, the collecting barrel 118 can be taken down, through the arrangement of the first bearing 106, the rotating shaft 107, the disc 108, the blades 109, the oscillating rod 110, the piston plate 111 and the filter screen 112, after the sewage enters the tank body 101 through the water inlet pipe 103, the sewage can impact the blades 109 to drive the disc 108 to rotate anticlockwise so as to drive the oscillating rod 110 to intermittently and downwards extrude the linkage rod 135, in cooperation with the arrangement of the fixed block 113, the vertical rod 114, the stop block 115 and the first spring 116, under the action of the elastic force of the first spring 116, the piston plate 111 drives the filter screen 112 to intermittently vibrate to shake out impurities blocked in the filter holes of the filter screen 112 so as to avoid the blockage of the filter screen 112, and the filtered impurities slide into the collecting barrel 118, the outer wall of the collecting barrel 118 is fixedly connected with the threaded ring 119, the left side and the right side of the collecting barrel 118 are both provided with the slots 120 arranged inside the threaded ring 119, the inner wall, threaded groove 122 has been seted up at the middle part of horizontal pole 121, and the intercommunication has connecting pipe 123 between just being located inlet tube 103 and the blast pipe 105 on the top outer wall of jar body 101, and the top threaded connection of connecting pipe 123 has tube cap 124, and the both sides all are equipped with the locating lever 125 of fixed mounting on the outer wall of jar body 101 top about connecting pipe 123.

Referring to fig. 1 and 6-8, a baffle plate 126 is fixedly mounted on an inner wall of the exhaust pipe 105, a flow hole 127 is formed in the middle of the baffle plate 126, a fixing plate 128 is fixedly mounted on the inner wall of the exhaust pipe 105 and above the baffle plate 126, an adjusting block 129 is fixedly mounted on an outer wall of the bottom of the fixing plate 128, an adjusting groove 130 is formed in the adjusting block 129, a plunger 131 is movably mounted in the adjusting groove 130, a second spring 132 is connected between the plunger 131 and the inner wall of the adjusting groove 130, the plunger 131 penetrates through the adjusting groove 130, the plunger 131 is slidably connected with the flow hole 127, a sealing ring 136 is fixedly connected to an outer wall of the plunger 131, the sealing ring 136 is attached to the baffle plate 126, the sealing performance of a joint between the plunger 131 and the adjusting groove 130 can be ensured by the arrangement of the baffle plate 126, the flow hole 127, the fixing plate 128, the adjusting block 129, the adjusting groove 130, the, when the air pressure in the tank 101 is too high, the plunger 131 is pushed upwards by the air pressure to conduct the circulation hole 127, so that the exhaust pipe 105 is conducted, and the gas is discharged from the circulation hole 127, the leak hole 133 and the exhaust pipe 105, thereby automatically relieving the pressure, avoiding the excessive air pressure in the tank 101, and enabling the plunger 131 to automatically reset under the action of the elastic force of the second spring 132 after the air pressure is reduced.

Referring to fig. 1 and 9-10, the material taking device includes a handle 201, a second bearing 202 is fixedly connected to an outer wall of the handle 201, a positioning ring 203 is fixedly connected to an outer wall of an outer ring of the second bearing 202, a connecting rod 204 is fixedly connected to a bottom end of the handle 201, a U-shaped rod 205 is fixedly connected to an end of the connecting rod 204 away from the handle 201, positioning holes 207 formed in the positioning ring 203 are formed in left and right sides of the second bearing 202, a threaded rod 206 is connected to an inner portion of the handle 201, the positioning hole 207 is sized to fit the positioning rod 125, the threaded rod 206 fits the threaded groove 122, the U-shaped rod 205 fits the slot 120, the threaded rod 206 penetrates the connecting rod 204 and the U-shaped rod 205, the pipe cover 124 is unscrewed, the handle 201 is moved to insert the U-shaped rod 205 and the connecting rod 204 into the tank 101 through the connecting pipe 123, the positioning rod 125 is inserted into the positioning hole 207 and the, the handle 201 is rotated, the threaded ring 119 is driven to rotate through the connecting rod 204 and the U-shaped rod 205, the threaded ring 119 is separated from the connecting ring 117, the collecting barrel 118 can be taken out by lifting the handle 201, and then the filtered impurities can be taken out.

A use method of a shallow sand filter comprises the following steps:

s1, communicating a water inlet pipe 103 with a sewage discharge pipeline, communicating a water outlet pipe 104 with a drainage pipeline, and opening valves on the water inlet pipe 103 and the water outlet pipe 104;

s2, sewage enters the tank body 101 through the water inlet pipe 103, the filter screen 112 filters the sewage, the activated carbon adsorption screen 134 adsorbs the sewage, and the filtered and adsorbed sewage is discharged through the water outlet pipe 104;

s3, when sewage enters the tank body 101, the blades 109 are impacted, the disc 108 is driven to rotate anticlockwise, the oscillating rod 110 intermittently extrudes the linkage rod 135 downwards, the filter screen 112 intermittently vibrates, the filter screen 112 is prevented from being blocked, and filtered impurities slide into the collecting barrel 118;

s4, when the air pressure in the tank body 101 is too high, the air pressure pushes the plunger 131 upwards to enable the circulation hole 127 to be communicated, the exhaust pipe 105 is further communicated, the gas is discharged from the circulation hole 127, the leakage hole 133 and the exhaust pipe 105, and after the air pressure is reduced, the plunger 131 can be automatically reset under the action of the elastic force of the second spring 132;

s5, when the impurities are cleaned and filtered, the valves on the water inlet pipe 103 and the water outlet pipe 104 are closed, the pipe cover 124 is screwed off, and the collecting barrel 118 is taken out by using the material taking device, so that the filtered impurities can be taken out.

According to the invention, through the arrangement of the first bearing 106, the rotating shaft 107, the disc 108, the blades 109, the swing rod 110, the piston plate 111 and the filter screen 112, after sewage enters the tank body 101 through the water inlet pipe 103, the sewage can impact the blades 109 to drive the disc 108 to rotate anticlockwise so as to drive the swing rod 110 to intermittently extrude the linkage rod 135 downwards, and under the action of the elastic force of the first spring 116, the piston plate 111 drives the filter screen 112 to intermittently vibrate to shake out impurities blocked in filter holes of the filter screen 112 so as to avoid the blockage of the filter screen 112 by matching with the arrangement of the fixed block 113, the vertical rod 114, the stop block 115 and the first spring 116; the provision of a collection tank 118 facilitates the collection of the filtered impurities; the activated carbon adsorption net 134 adsorbs the filtered sewage, so that the filtering effect is improved; through the arrangement of the baffle plate 126, the flow hole 127, the fixing plate 128, the adjusting block 129, the adjusting groove 130, the plunger 131 and the second spring 132, when the air pressure in the tank body 101 is too high, the air pressure pushes the plunger 131 upwards to enable the flow hole 127 to be conducted, the exhaust pipe 105 is conducted, and the air is exhausted from the flow hole 127, the leak hole 133 and the exhaust pipe 105, so that the pressure is automatically relieved, the phenomenon that the air pressure in the tank body 101 is too high is avoided, and the plunger 131 can be automatically reset under the action of the elastic force of the second spring 132 after the air pressure is reduced; through the arrangement of the handle 201, the second bearing 202, the positioning ring 203, the connecting rod 204, the U-shaped rod 205, the screw 206, the positioning hole 207, the connecting pipe 123, the pipe cover 124 and the positioning rod 125, the pipe cover 124 is unscrewed, the movable handle 201 penetrates through the connecting pipe 123 to insert the U-shaped rod 205 and the connecting rod 204 into the tank body 101, the positioning rod 125 is inserted into the positioning hole 207 and the U-shaped rod 205 is inserted into the insertion groove 120, the screw 206 is screwed to connect the screw 206 with the thread groove 122, the handle 201 is rotated, the threaded ring 119 is driven to rotate through the connecting rod 204 and the U-shaped rod 205, the threaded ring 119 is separated from the connecting ring 117, the collecting barrel 118 can be taken out by lifting the; compared with the prior art, can realize simple structure practicality, the operation of being convenient for, convenient to use, the filter effect is good, can effectually avoid filter screen 112 to block up, is convenient for take out by filterable impurity, and when intraductal atmospheric pressure was too big, can carry out the pressure release automatically.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims (10)

1. The utility model provides a shallow sand filter, includes jar body (101), its characterized in that: the water tank is characterized in that a support frame (102) is fixedly mounted on the outer wall of the bottom of the tank body (101), a water inlet pipe (103) is communicated with the outer wall of the top of the tank body (101), a water outlet pipe (104) is communicated with the outer wall of the bottom of the tank body (101), an exhaust pipe (105) is communicated with the outer wall of the top of the tank body (101) and positioned on the right side of the water inlet pipe (103), first bearings (106) are fixedly mounted on the inner walls of the front side and the rear side of the tank body (101), a rotating shaft (107) is movably mounted between the first bearings (106), a disc (108) is fixedly connected to the outer wall of the rotating shaft (107), a plurality of blades (109) which are uniformly distributed in an annular shape are fixedly connected to the outer wall of the side face of the disc (108), a swing rod (110) is fixedly connected to the outer wall of one, a filter screen (112) is fixedly installed in the middle of the piston plate (111), fixed blocks (113) are fixedly installed on the inner walls of the left side and the right side of the tank body (101), the fixed blocks (113) are located below the piston plate (111), vertical rods (114) are fixedly installed at the top ends of the fixed blocks (113), check blocks (115) are fixedly installed at the top ends of the vertical rods (114), first springs (116) are sleeved on the outer walls of the vertical rods (114), and linkage rods (135) are fixedly connected to the top ends of the piston plate (111);

a connecting ring (117) is fixedly installed on the inner wall of the bottom end of the filter screen (112), a collecting barrel (118) is movably installed inside the connecting ring (117), a threaded ring (119) is fixedly connected to the outer wall of the collecting barrel (118), inserting grooves (120) formed in the threaded ring (119) are formed in the left side and the right side of the collecting barrel (118), a cross rod (121) is fixedly installed on the inner wall of the collecting barrel (118), a threaded groove (122) is formed in the middle of the cross rod (121), a connecting pipe (123) is communicated between the water inlet pipe (103) and the exhaust pipe (105) and is formed in the outer wall of the top of the tank body (101), a pipe cover (124) is connected to the top end of the connecting pipe (123) in a threaded mode, and positioning rods (125) on the outer wall of the top of the tank body (101);

fixed mounting has baffle (126) on the inner wall of blast pipe (105), circulation hole (127) have been seted up at the middle part of baffle (126), the top fixed mounting who just is located baffle (126) on the inner wall of blast pipe (105) has fixed plate (128), fixed mounting has regulating block (129) on the bottom outer wall of fixed plate (128), adjustment tank (130) have been seted up to the inside of regulating block (129), the inside movable mounting of adjustment tank (130) has plunger (131), be connected with second spring (132) between the inner wall of plunger (131) and adjustment tank (130).

2. The shallow sand filter of claim 1, wherein: the outer walls of the water inlet pipe (103) and the water outlet pipe (104) are respectively provided with a valve, and two ends of the rotating shaft (107) are respectively fixedly connected with the inner walls of the inner rings of the two first bearings (106).

3. The shallow sand filter of claim 1, wherein: the vertical rod (114) penetrates through the piston plate (111) and is in sliding connection with the piston plate, the first spring (116) is located between the piston plate (111) and the fixed block (113), the swinging rod (110) is in sliding connection with the linkage rod (135), and the threaded ring (119) is in threaded connection with the connecting ring (117).

4. The shallow sand filter of claim 1, wherein: the filter screen (112) is conical, the top end of the collecting barrel (118) is open, and threads are arranged on the inner wall of the thread groove (122).

5. The shallow sand filter of claim 1, wherein: the inner wall of the tank body (101) is fixedly provided with an activated carbon adsorption net (134), and the activated carbon adsorption net (134) is positioned below the collecting barrel (118).

6. The shallow sand filter of claim 1, wherein: the plunger (131) penetrates through the adjusting groove (130), the plunger (131) is in sliding connection with the flow hole (127), a sealing ring (136) is fixedly connected to the outer wall of the plunger (131), and the sealing ring (136) is attached to the baffle (126).

7. The shallow sand filter of claim 1, wherein: a plurality of leakage holes (133) are formed in the fixing plate (128).

8. The method of using a shallow sand filter as claimed in any one of claims 1 to 7, wherein: the method comprises the following steps:

s1, communicating a water inlet pipe (103) with a sewage discharge pipeline, communicating a water outlet pipe (104) with a drainage pipeline, and opening valves on the water inlet pipe (103) and the water outlet pipe (104);

s2, sewage enters the tank body (101) through the water inlet pipe (103), the filter screen (112) filters the sewage, the activated carbon adsorption screen (134) adsorbs the sewage, and the filtered and adsorbed sewage is discharged through the water outlet pipe (104);

s3, when sewage enters the tank body (101), the blades (109) are impacted, the disc (108) is driven to rotate anticlockwise, the oscillating rod (110) intermittently extrudes the linkage rod (135) downwards, the filter screen (112) intermittently vibrates, the filter screen (112) is prevented from being blocked, and filtered impurities slide into the collecting barrel (118);

s4, when the air pressure in the tank body (101) is too high, the air pressure pushes the plunger (131) upwards to enable the circulation hole (127) to be communicated, so that the exhaust pipe (105) is communicated, the gas is discharged from the circulation hole (127), the leakage hole (133) and the exhaust pipe (105), and after the air pressure is reduced, the plunger (131) can be automatically reset under the action of the elastic force of the second spring (132);

s5, when the impurities are cleaned and filtered, the valves on the water inlet pipe (103) and the water outlet pipe (104) are closed, the pipe cover (124) is screwed off, and the collecting barrel (118) is taken out by using the material taking device, so that the filtered impurities can be taken out.

9. The use method of the shallow sand filter as claimed in claim 8, wherein: the extracting device includes handle (201), fixedly connected with second bearing (202) on the outer wall of handle (201), fixedly connected with holding ring (203) on the outer wall of second bearing (202) outer lane, the bottom fixedly connected with connecting rod (204) of handle (201), the one end fixedly connected with U type pole (205) of handle (201) are kept away from in connecting rod (204), the left and right sides of second bearing (202) all is equipped with sets up locating hole (207) inside holding ring (203), the inside threaded connection of handle (201) has screw rod (206).

10. The use method of the shallow sand filter as claimed in claim 9, wherein: the size of the positioning hole (207) is matched with that of the positioning rod (125), the screw rod (206) is matched with the thread groove (122), the U-shaped rod (205) is matched with the insertion groove (120), and the screw rod (206) penetrates through the connecting rod (204) and the U-shaped rod (205).

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