CN112169446A - Device of ultrasonic wave back flush filter core - Google Patents

Abstract

The invention relates to a device for backwashing a filter element by ultrasonic waves. The invention comprises a closed back washing device and a circulating washing loop connected with the input and output ports of the back washing device, wherein an ultrasonic vibrating rod and a structure for positioning a filter element are arranged in the back washing device, the filter element to be cleaned is positioned and sleeved on the ultrasonic vibrating rod and two ports of the filter element are closed, the washing liquid is supplied into the filter element cylinder through the external circulation loop and is discharged from the outside of the filter element cylinder through the filter layer of the filter element cylinder, the flushing of the filter element is realized under the promoting action of the ultrasonic wave generated by the ultrasonic vibrating bar, the circulating flushing loop is provided with a filter and a graded filtering liquid storage tank body, the flushing liquid after flushing can be filtered, the flushing liquid can also be independently and circularly filtered, the circular flushing loop is also provided with an air source branch loop, can insert compressed gas and carry out the flowing back, be convenient for get fast and put the filter core, realized the high-efficient washing of old and useless filter core, with low costs, effectual.

Description

Device of ultrasonic wave back flush filter core

Technical Field

The invention belongs to the technical field of hydraulic filter element cleaning treatment, and particularly relates to a device for backwashing a filter element by ultrasonic waves.

Background

The net type filter element is composed of a metal net wound on a support frame, impurities in oil are blocked by the aid of tiny meshes of the metal net, the net type filter element can generally filter impurity particles with the diameter larger than 0.08-0.18 mm, pressure loss is low, and a filter of the net type filter element is generally used as an oil suction port of a pump and is used as a coarse filter to achieve large capacity and convenient cleaning; the sintered filter element is formed by sintering metal powder, the micropores among the metal particles are used for blocking impurities in oil from passing through, and the filter elements with different filtering precisions can be manufactured by changing the size of the metal particle powder. The sintered filter element can filter out impurity particles with the diameter larger than 0.01-0.1 mm, the pressure loss is low, the sintered filter element is used on a pressure oil circuit or a pressure return circuit, the manufacturing is simple, the filtering precision is high, and high pressure can be borne, so the application of the net filter element and the sintered filter element is wide in the hydraulic field, the filter element belongs to consumables, the filter element is scrapped after being used under the general condition, the aim of green energy conservation is fulfilled by recycling industrial products, the net filter element and the sintered filter element are cleaned, and the filter element is completely recovered or recovered to be close to the initial filtering state to enable the filter element to have secondary or repeated use conditions, so that the filter element is beneficial to environmental protection and capital expenditure saving, but the conventional cleaning technical equipment cannot effectively recover the filtering function of.

Disclosure of Invention

The invention discloses a device for backwashing a filter element by ultrasonic waves, which aims to solve the problem of cleaning the filter element.

The invention adopts the following technical scheme:

an ultrasonic device for backwashing a filter element comprises a backwashing device and a circulating system, wherein the backwashing device comprises a transverse outer barrel provided with a flushing fluid outlet and an inlet, a barrel body of the outer barrel is provided with a left end cover and a right end cover capable of being opened and closed, the outer barrel is sealed by the left end cover and the right end cover to form a sealed inner cavity, a middle partition plate is further arranged in the outer barrel and divides the inner cavity of the outer barrel into a left cavity and a right cavity, the inlet is communicated with the left cavity, the outlet is communicated with the right cavity, through holes are distributed on the middle partition plate, a connector sleeve is matched with the through holes and positioned in the right cavity, the connector sleeve is provided with an axial through hole, a left ring platform and a right ring platform, the left ring platform is in clearance fit with the through holes, the right ring platform is matched with the inner hole from the end of the filter element, the left end cover is fixedly provided with an ultrasonic vibration rod extending into the outer barrel, an annular gap through which fluid passes is reserved between the axial through hole of the interface sleeve and the ultrasonic vibrating rod penetrating through the axial through hole, so that the inner cylinder of the filter element is communicated with the left cavity;

the circulation loop includes: the device comprises a strong magnetic filter, a bag type filter, a first absorbent cotton wire wound filter, a flushing tank, a circulating power source and a second absorbent cotton wire wound filter which are sequentially connected, wherein the outlet of the second absorbent cotton wire wound filter is connected with the input port of a backwashing device, and the output port of the backwashing device is connected with the inlet of the strong magnetic filter.

The flushing tank includes first flushing tank, second flushing tank, third flushing tank, the export of three flushing tank, entry set up independent control's electric valve respectively, the input port interconnect confluence before the entry electric valve of three flushing tank, the delivery outlet interconnect confluence behind the export electric valve of three flushing tank, the confluence input port of the three flushing tank of exit linkage of first cotton wool winding filter, the circulation power source entry is connected to the confluence output port of three flushing tank, backwash assembly's flush fluid delivery outlet includes: set up in the urceolus lower part and connect the first export in left chamber, set up export and the third export under the second that urceolus lower part and right chamber are connected, set up in urceolus upper portion and connect the last export in right chamber, export under the first wash tank is connected through electric valve, export under the second and the third export the strong magnetic filter entry of connection through electric valve after the confluence, go up the export and connect strong magnetic filter entry through electric valve.

Circulation circuit sets up logic component and the gas-liquid switching circuit that is used for the flush fluid evacuation, specifically sets up the second check valve for circulation power supply export, the second check valve with set up the air supply input branch road between the second cotton wool winding filter, the air supply input branch road is: the valve is composed of an electric valve and a first one-way valve which are arranged in a branch in sequence after being connected to an air source input port.

The circulating power source is a diaphragm pump, pressure gauges are arranged in front of and behind a loop of the bag filter respectively, and the pressure gauges are arranged in front of and behind a loop of the second absorbent cotton wire wound filter respectively.

The box body of the flushing box is provided with a respirator, the side of the box body is provided with a liquid level meter, and a heater is arranged in the box body.

The opening and closing are realized by arranging a flange at the right port of the outer cylinder and connecting the flange with a right end cover through a bolt.

The back washing device is provided with three filter element installation setting positions, the middle partition plate body is provided with three through holes which are used for being matched with the installation interface sleeve, and correspondingly, the position and the number of the ultrasonic vibration rods arranged on the left end cover are matched with the position and the number of the through holes of the middle partition plate.

The change can be dismantled to the interface cover, and right side ring platform external diameter can be according to the filter core rather than the link hole diameter do the adaptability change, and interface cover length can be according to filter core length do the adaptability change.

The active extension length of the ultrasonic tool head covers the length of the right cavity.

Compared with the prior art, the invention can obtain the following technical effects: can pack into back flush unit with the old and useless filter core of a plurality of different specifications simultaneously in, carry out the back flush treatment under the independent ultrasonic action, wash the in-process, the washing liquid filters the recovery that realizes impurity through the multichannel filter, through tertiary circulation treatment, it is more thorough to make old and useless filter core wash, and recycle ratio is higher, has the independent circulation filtering capability of flush fluid simultaneously concurrently, sets up air supply logic branch return circuit, can empty the flush fluid in the back flush unit, need not artifical flowing back, realizes that the filter core of low manpower output gets and puts.

The invention realizes the high-efficiency cleaning of the waste filter elements such as net type filter elements, sintered type filter elements and the like, and has low cost and good effect.

Drawings

FIG. 1 is a schematic diagram of the present invention;

FIG. 2 is a schematic view of the construction of a backwash assembly according to the present invention;

fig. 3 is a cross-sectional view of the interface sleeve of the present invention.

Wherein, 1-a backwashing device, 2-a strong magnetic filter, 3-a bag filter, 4-a first degreasing cotton thread-wound filter, 5-a pressure gauge, 6-a first flushing tank, 7-a second flushing tank, 8-a third flushing tank, 9-a respirator, 10-a liquid level meter, 11-a heater, 12-a diaphragm pump, 13-an air source input port, 14-a first one-way valve, 15-a second one-way valve, 16-a second degreasing cotton thread-wound filter, 17-a filter element, 101-a left end cover, 102-an outer cylinder, 103-a middle clapboard, 104-a flange, 105-a right end cover, 106-an interface sleeve, 107-an ultrasonic vibration rod, 108-an upper inlet, 109-a first lower outlet and 110-a second lower outlet, 111-third lower outlet, 112-upper outlet, 106-1-left loop platform, 106-2-right loop platform.

Detailed Description

Referring to fig. 1, an apparatus for ultrasonically backwashing a filter element includes: the device comprises a backwashing device 1, a strong magnetic filter 2, a bag filter 3, a first absorbent cotton wire wound filter 4, a pressure gauge 5, a flushing tank, a diaphragm pump 12, a second one-way valve 15, a second absorbent cotton wire wound filter 16, an air source input port 13, a first one-way valve 14, an electric ball valve and a system circulation loop formed by the above components;

the flushing tank comprises a first flushing tank 6, a second flushing tank 7 and a third flushing tank 8, the three flushing tanks are identical in structure, for example, the first flushing tank 6 is provided with a breather 9 on the tank body, a liquid level meter 10 is arranged on the side of the tank body, and a heater 11 is arranged in the tank body; the outlets and inlets of the three flushing tanks are respectively provided with independently controlled electric valves, the inlets in front of the electric valves at the inlets of the three flushing tanks are mutually connected and converged, and the outlets behind the electric valves at the outlets of the three flushing tanks are mutually connected and converged;

the backwashing device 1 is provided with a flushing liquid output port and an input port, a primary filtering loop is connected and arranged between the flushing liquid output port of the backwashing device 1 and the input ports of the three flushing tanks, a strong magnetic filter 2, a bag filter 3 and a first absorbent cotton wire wound filter 4 which are sequentially connected in series are arranged in the loop, wherein the front end and the rear end of the bag filter 3 are respectively provided with a pressure gauge 5;

the loop between the confluence output port of the three flushing tanks and the input port of the flushing tank backwashing device 1 is provided with a circulating liquid power source and a filter at the input end of the backwashing device 1 in series, and the circulating power source is as follows: the diaphragm pump 12 has better conveyer belt particles and high-viscosity liquid, the filter at the input end of the back washing device 1 is a second absorbent cotton wire-wound filter 16, and pressure gauges are respectively arranged in series in the front and at the back of a loop of the second absorbent cotton wire-wound filter 16 and can be used for independently and circularly filtering flushing liquid;

the circulation loop sets up logic element and the gas-liquid switching circuit that is used for backwash device 1 flush fluid evacuation, specifically sets up second check valve 15 for diaphragm pump 12 export, and second check valve 15 and second absorbent cotton wire set up the air supply input branch between wound filter 16, and the air supply input branch is: the first check valve 14 prevents flushing liquid from reversely entering the air source branch by an electric valve and the first check valve 14 which are sequentially arranged in the branch after the air source input port 13 is connected.

As shown in fig. 1-2, the backwashing device 1 comprises an outer cylinder 102 provided with a flushing liquid outlet and an inlet, the outer cylinder 102 is provided with a left end cover 101 and a right end cover 105, the left end cover 101 is fixedly provided with an ultrasonic vibration rod 107 extending into the outer cylinder 102, the right end cover 105 is a detachable sealing cover, the opening and closing are realized by the bolt connection of a flange 104 arranged at the right end opening of the outer cylinder 102 and the right end cover 105, a filter element can be placed in the cylinder of the outer cylinder 102, and the left end cover 101 and the right end cover 105 seal the outer cylinder 102 to form a closed.

As shown in fig. 1-3, the outer cylinder 102 is horizontally arranged, a middle partition plate 103 is further arranged in the outer cylinder 102, the middle partition plate 103 divides the inner cavity of the outer cylinder into a left cavity and a right cavity, through holes are distributed on the middle partition plate 103, the interface sleeve 106 is matched with the via hole and is arranged in the right cavity, the interface sleeve 106 is provided with an axial through hole, a left annular table 106-1 and a right annular table 106-2, the left annular table 106-1 is in clearance fit with the via hole, the right annular table 106-2 is matched with the inner hole at the end of the filter element, the filter element is fixed in the outer cylinder through the butt-clamping positioning of the interface sleeve 106 and the right end cover 105, the specifications of the filter element are different, the inner hole and the length of the filter element are different, the right annular table 106-2 outer diameter M1 and the length M2 of the interface sleeve can be adaptively changed according to the size of the filter element, the interface sleeve 106 can be replaced and adjusted, the axial direction of the interface sleeve 106 is provided with a hole for the ultrasonic vibration rod 107 to pass through, and the flushing fluid of an input port of the backwashing device 1 is: an upper inlet 108 disposed at the upper portion of the outer tub 102 and connected to the left chamber, the outlet comprising: a first lower outlet 109 arranged at the lower part of the outer cylinder 102 and connected with the left cavity, a second lower outlet 110 and a third lower outlet 111 arranged at the lower part of the outer cylinder 102 and connected with the right cavity, an upper outlet 112 arranged at the upper part of the outer cylinder 102 and connected with the right cavity, the first lower outlet 109 is connected with the first flushing tank 6 through an electric valve, the second lower outlet 110 and the third lower outlet 111 are connected with the inlet of the strong magnetic filter 2 through the electric valve after confluence, the upper outlet 112 is connected with the inlet of the strong magnetic filter 2 through the electric valve, the ultrasonic vibration rod 107 extending into the outer cylinder 102 passes through the axial through hole of the interface sleeve 106 and extends to the right cavity, the length of the action extension section of the ultrasonic tool head covers the length of the right cavity, the ultrasonic tool head is used for generating ultrasonic vibration, and the vibration energy is emitted into the liquid, and an annular gap for passing the fluid is reserved between the axial through hole of the interface sleeve 106 and the ultrasonic vibrating rod 107 penetrating through the axial through hole.

The cleaning efficiency and the cleaning quality of the filter element 17 are comprehensively considered, as shown in fig. 2, the backwashing device 1 preferably has three filter element installation setting positions, three through holes for being matched with the interface sleeves 106 are distributed on the plate body of the middle partition plate 103, and correspondingly, the positions and the numbers of the ultrasonic vibration rods 107 arranged on the left end cover 101 are matched with the positions and the numbers of the through holes of the middle partition plate 103.

The flushing working method comprises the following steps:

as shown in fig. 2-3, in a first step, the installation of the cartridge 17: the right cavity of the outer cylinder 106 is opened by a bolt connected with the dismounting flange 104 and the right end cover 105, the interface sleeve 106 matched with the specification of the filter element 17 is selected to be inserted into a through hole of the middle partition plate 103, the filter element 17 is installed at the installation position of the interface sleeve 106 matched with the filter element 17 to be cleaned, the ultrasonic vibration rod 107 is sleeved on the filter element 17 in a penetrating mode, the right annular table 106-2 is matched with an inner hole of the filter element 17, the right cavity is sealed by the bolt connecting flange 104 and the right end cover 105, the requirement that M2+ the length of the filter element = M3 is met, and.

As shown in fig. 1-2, the second step, the step of the staged loop flushing method:

step 1, a first filtering cycle is carried out, electric valves D4, D5, D9, D10, D2 and D1 are closed, the diaphragm pump 12 works, circulating liquid is extracted from the first flushing tank 6, the circulating liquid is output from a pressure port of the diaphragm pump 12 and enters a left cavity of the backwashing device 1 through a second one-way valve 15 and a second degreasing cotton wire wound filter 16 from an upper inlet 108, flushing liquid in the left cavity enters a through hole of a plate body of a middle partition plate 103 and an axial through hole of a connector sleeve 106 and enters an inner hole of a filter element 17 and passes through a filter screen of a cylinder body of the filter element 17 from inside to outside, impurities in the body of the filter element 17 are discharged, an ultrasonic vibration rod 107 works simultaneously to generate ultrasonic vibration and emit the ultrasonic vibration energy into the liquid to promote efficient separation of the filtered impurities in the body of the filter element 17 from the filter screen, flushing liquid containing the impurities flows out from a second lower outlet 110, a third lower outlet 111 and an upper, Bag filter 3, first cotton wool wound filter 4 flow back to first flush tank 6, and the flush fluid carries out impurity filtering through strong magnetic filter 2, bag filter 3, first cotton wool wound filter 4, can handle and filter magnetic impurity, particle, suspended solid etc. and bag filter 3's jam accessible sets up around manometer pressure differential judge.

And 2, after continuous circulating filtration is carried out for a certain time, according to the circulating resistance condition of the pressure gauge 5, carrying out filter element replacement on the strong magnetic filter 2, the bag filter 3, the first absorbent cotton wire-wound filter 4 and the second absorbent cotton wire-wound filter 16 through which the flushing liquid passes.

Step 3, a second filtering cycle, wherein the electric valves D4, D5, D8, D10, D3 and D1 are closed, the diaphragm pump 12 works, circulating liquid is extracted from the second flushing tank 7, the circulating liquid is output from a pressure port of the diaphragm pump 12, passes through the second one-way valve 15 and the second degreasing cotton wire wound filter 16, enters a left cavity of the backwashing device 1 from the upper inlet 108, flushing liquid in the left cavity enters a through hole of a plate body of the middle partition plate 103 and an axial through hole of the interface sleeve 106, enters an inner hole of the filter element 17, passes through a filter screen of a cylinder body of the filter element 17 from inside to outside, impurities in the body of the filter element 17 are discharged, the ultrasonic vibration rod 107 works simultaneously to generate ultrasonic vibration and emit the ultrasonic vibration energy into the liquid to promote efficient separation of the filtered impurities in the body of the filter element 17 from the filter screen, flushing liquid containing the impurities flows out from the second lower outlet 110, the third lower outlet 111 and the, And (3) refluxing the bag filter 3 and the first absorbent cotton thread-wound filter 4 to a second flushing tank 7, and repeating the step (2).

Step 4, a third filtration cycle, wherein the electric valves D4, D5, D8, D9, D3 and D2 are closed, the diaphragm pump 12 works, the circulating liquid is extracted from the third flushing tank 8, the circulating liquid is output from a pressure port of the diaphragm pump 12, passes through the second one-way valve 15 and the second absorbent cotton wire-wound filter 16, enters a left cavity of the backwashing device 1 from the upper inlet 108, flushing liquid in the left cavity enters a through hole of a plate body of the middle partition plate 103 and an axial through hole of the interface sleeve 106, enters an inner hole of the filter element 17, passes through a filter screen of a cylinder body of the filter element 17 from inside to outside, impurities in the body of the filter element 17 are discharged, the ultrasonic vibration rod 107 works simultaneously to generate ultrasonic vibration and emit the ultrasonic vibration energy into the liquid to promote efficient separation of the filtered impurities in the body of the filter element 17 from the filter screen, flushing liquid containing the impurities flows out from the second lower outlet 110, the third lower outlet 111, And (3) refluxing the bag filter 3 and the first absorbent cotton thread-wound filter 4 to a third flushing tank 8, and repeating the step (2).

As shown in fig. 1-2, the third step, emptying the rinse:

the diaphragm pump 12 stops working, the electric valve D4 is opened, compressed gas is introduced from the gas source input port 13 and sequentially passes through the first one-way valve 14 and the second absorbent cotton wire-wound filter 16, and enters the backwashing device 1 from the upper inlet 108, the electric valves D5 and D6 are opened, any one of the electric valves D8, D9 and D10 is opened, flushing liquid in the left and right cavities of the backwashing device 1 flows through the low-level first lower outlet 109, the second lower outlet 110 and the third lower outlet 111, flows back to the first flushing tank 6 from the electric valve D5, flows back to the connected flushing tank from the electric valve D6 through the initial filtering loop, and flows back to any one of the electric valves D8, D9 and D10 to open the connected flushing tank, and the second one-way valve 15 prevents the compressed gas from flowing back to the diaphragm pump 12.

After purging and emptying the flushing liquid, the diaphragm pump 12 is stopped, the electric valves D4, D5, D6 and D7 are closed, the right end cover 105 is opened, and the filter element is taken out and dried for storage.

As shown in fig. 1-2, the washing liquid is filtered circularly:

first flushing tank 6 is as elementary rose box, and the pollutant is more, therefore independently carries out the loop filter processing of flush fluid very necessary, and at this moment, back flush unit 1's left chamber is as circulating the overflow chamber, and right intracavity environmental condition and operating condition do not receive the influence of flush fluid loop filter, and flush fluid loop filter can carry out under the optional condition promptly, specifically is: when the electric valve D4 is closed, the diaphragm pump 12 works, the circulating liquid is output from the pressure port of the diaphragm pump 12, enters the left cavity of the backwashing device 1 through the second one-way valve 15 and the second cotton wool winding type filter 16 from the upper inlet 108, enters the first flushing box 6 from the first lower outlet 109 connected with the left cavity and the opened electric valve D5, and then flows back to the inlet of the diaphragm pump 12 from the first flushing box 6 through the opened electric valve D3, so that a circulating filtering closed loop is formed, the washing liquid is mainly filtered by the first flushing box 6, the left cavity of the backwashing device 1 and the main loop, the second cotton wool winding type filter 16 plays a role in filtering pollutants in the process, and the filter element of the second cotton wool winding type filter 16 is blocked and judged by the pressure difference value of the pressure gauges arranged in front and back of the second cotton wool winding type filter 16, so that the filter element is replaced.

Cleaning liquids of solvents with different proportions can be respectively added into the first flushing tank 6, the second flushing tank 7 and the third flushing tank 8, the first flushing tank 6, the second flushing tank 7 and the third flushing tank 8 can be respectively heated to the cleaning liquids with different temperatures, when the second step of grading circulation flushing is executed, the emptying flushing liquid program of the third step can be inserted between every two steps of circulation, the cleaning liquids of the solvents with different temperatures and different proportions are discharged back to the corresponding flushing tanks, the purpose of grading circulation flushing is achieved, and the effect of a filter element which is difficult to clean is better.

Claims (9)

1. The utility model provides a device of ultrasonic wave back flush filter core, includes back flush unit (1) and circulation system, its characterized in that: the backwashing device (1) comprises a transverse outer cylinder (102) provided with a flushing liquid outlet and a flushing liquid inlet, a left end cover (101) and a right end cover (105) capable of being opened and closed are arranged on a cylinder body of the outer cylinder (102), the left end cover (101) and the right end cover (105) seal the outer cylinder (102) to form a sealed inner cavity, a middle partition plate (103) is further arranged in the outer cylinder (102), the middle partition plate (103) divides the inner cavity of the outer cylinder into a left cavity and a right cavity, the inlet is communicated with the left cavity, the outlet is communicated with the right cavity, via holes are distributed on the middle partition plate (103), a connector sleeve (106) is matched with the via holes and is positioned in the right cavity, the connector sleeve (106) is provided with an axial through hole, a left annular table (106-1) and a right annular table (106-2), the left annular table (106-1) is in clearance fit with the via holes, and the right annular table (106-2, the left end cover (101) is fixedly provided with an ultrasonic vibration rod (107) extending into the outer barrel (102), an ultrasonic tool head of the ultrasonic vibration rod (107) penetrates through the interface sleeve (106) to extend to a right cavity, the interface sleeve (106) and the right end cover (105) clamp a positioning filter element and are fixed in the right cavity of the outer barrel (102), an annular gap for fluid to pass through is reserved between an axial through hole of the interface sleeve (106) and the ultrasonic vibration rod (107) penetrating through the axial through hole, and the inner cylinder of the filter element is communicated with the left cavity;

the circulation loop includes: the device comprises a loop consisting of a strong magnetic filter (2), a bag filter (3), a first absorbent cotton wire wound filter (4), a flushing tank, a circulating power source and a second absorbent cotton wire wound filter (16) which are sequentially connected, wherein the outlet of the second absorbent cotton wire wound filter (16) is connected with the inlet of a backwashing device (1), and the outlet of the backwashing device (1) is connected with the inlet of the strong magnetic filter (2).

2. The apparatus of claim 1, wherein the ultrasonic backwash filter comprises: the flushing tank comprises a first flushing tank (6), a second flushing tank (7) and a third flushing tank (8), the outlets and inlets of the three flushing tanks are respectively provided with independently controlled electric valves, the input ports in front of the electric valves of the inlets of the three flushing tanks are mutually connected and converged, the output ports behind the electric valves of the outlets of the three flushing tanks are mutually connected and converged, the outlet of a first degreasing cotton thread wound filter (4) is connected with the converging input port of the three flushing tanks, the converging output port of the three flushing tanks is connected with the inlet of a circulating power source, and the flushing liquid output port of the backwashing device (1) comprises: the washing machine comprises a first lower outlet (109) which is arranged at the lower part of the outer barrel (102) and is connected with a left cavity, a second lower outlet (110) and a third lower outlet (111) which are arranged at the lower part of the outer barrel (102) and are connected with a right cavity, and an upper outlet (112) which is arranged at the upper part of the outer barrel (102) and is connected with the right cavity, wherein the first lower outlet (109) is connected with the first flushing box (6) through an electric valve, the second lower outlet (110) and the third lower outlet (111) are converged and then connected with an inlet of the strong magnetic filter (2) through the electric valve, and the upper outlet (112) is connected with an inlet of the strong magnetic filter (2) through.

3. The apparatus of claim 2, wherein the ultrasonic backwash filter comprises: circulation circuit sets up logic component and the gas-liquid switching circuit that is used for the flush fluid evacuation, specifically sets up second check valve (15) for circulation power supply export, second check valve (15) with set up air supply input branch between second cotton wool wire winding filter (16), air supply input branch is: an electric valve and a first one-way valve (14) are sequentially arranged in the branch after the gas source input port (13) is connected.

4. The apparatus of claim 3, wherein the ultrasonic backwash filter comprises: the circulation power source is a diaphragm pump (12), pressure gauges are arranged around a loop of the bag filter (3) respectively, and the pressure gauges are arranged around a loop of the second absorbent cotton wound filter (16) respectively.

5. The apparatus of claim 1, wherein the ultrasonic backwash filter comprises: a breather (9) is arranged on the flushing tank body, a liquid level meter (10) is arranged on the tank body side, and a heater (11) is arranged in the tank body.

6. The apparatus of claim 1, wherein the ultrasonic backwash filter comprises: a flange (104) is arranged at the right end opening of the outer cylinder (102) and is connected with a right end cover (105) through bolts to realize opening and closing.

7. The apparatus of claim 1, wherein the ultrasonic backwash filter comprises: the back washing device (1) is provided with three filter element installation setting positions, three through holes for adapting to the installation of the interface sleeve (106) are distributed on the plate body of the middle partition plate (103), and correspondingly, the positions and the number of the ultrasonic vibration rods (107) arranged on the left end cover (101) are adapted to the positions and the number of the through holes of the middle partition plate (103).

8. The apparatus of claim 1, wherein the ultrasonic backwash filter comprises: the interface sleeve (106) can be detached and replaced, the outer diameter of the right annular table (106-2) is adaptively changed according to the diameter of an inner hole of a connecting end of the filter element, and the length of the interface sleeve is adaptively changed according to the length of the filter element.

9. The apparatus of claim 1, wherein the ultrasonic backwash filter comprises: the length of the action extension section of the ultrasonic tool head covers the length of the right cavity.

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