Filter element backwashing device of filter

Abstract

The invention discloses a filter element backwashing device of a filter, and relates to the technical field of filters, the filter element backwashing device comprises a filter tank and a top cover used for sealing the filter tank, a filter element is arranged in the filter tank, the filter element is mounted at the joint of the filter tank and the top cover, and a mounting plate is fixedly connected in the top cover; the bottom of the mounting plate is detachably connected with a cleaning mechanism for cleaning the filter element, and the cleaning mechanism comprises a fixed sealing ring, a positioning plate and a plurality of cleaning assemblies. Through the arrangement of the cleaning mechanism, efficient cleaning of the inner wall of the filter element of the filter is achieved, in the cleaning process, gas serves as a power source, rotation, stretching and retracting of the cleaning assembly are pushed, rotating airflow is formed through jetting of high-pressure gas, and the rotating airflow can comprehensively and deeply clean silicon powder residues on the inner wall of the filter element; the cleaning efficiency is improved, and the cleaned filter element can be repeatedly used, so that the service life of the filter element is prolonged, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filter, in particular to a filter core backwashing device of filter. BACKGROUND

[0002] Silicon powder, also known as micro-silicon powder, is a kind of industrial dust that is collected from the exhaust gas of industrial electric furnace during the process of high-temperature smelting of industrial silicon and ferrosilicon. In the exhaust dust, SiO 2 The content accounts for about 90% of the total amount of dust, and the particle size is very small, almost at the nanometer level, so it is called silicon powder.

[0003] The working principle of tail gas filtration is that the dust is captured by the filter element due to the effects of screening, inertia, adhesion, diffusion and static electricity. Inertia is that the dust directly hits the filter layer and is captured, particles smaller than the pore size bypass the fiber with the airflow, and particles larger than the pore size are captured. The larger the particle size of the dust, the greater the inertia; the higher the filtration air speed, the greater the inertia. However, the higher the filtration air speed, the more serious the penetration phenomenon, the higher the dust concentration of the outlet gas, and the lower the filtration efficiency. When the dust particles are at the nanometer level, due to their extremely small size, Brownian motion like gas molecule thermal motion occurs, increasing the chances of dust contacting the filter layer surface, making the dust captured. The silicon powder filter needs to pass through two-stage filtration: first, remove large particles by gravity sedimentation separation; second, intercept fine particles by precise stainless steel fiber filter core, and the filtration precision can reach submicron level.

[0004] The filter core of the traditional silicon powder filter accumulates silicon powder on the surface of the filter core after long-term use, causing the filter core to be blocked, affecting the filtration of the silicon powder filter, resulting in poor filtration efficiency of the silicon powder filter. The filter core is usually fixedly installed inside the tank body and cannot be disassembled and replaced. When the filtering effect of the filter core cannot meet the filtering requirements after long-term use, it needs to be replaced, which not only increases the maintenance cost but also affects the continuous operation of the silicon powder filter.

[0005] In view of the above problems, a filter core backwashing device of filter is provided. SUMMARY

[0006] The purpose of the present application is to provide a filter core backwashing device of filter to solve the above problems.

[0007] To solve the above technical problems, the present application specifically provides the following technical solutions: The utility model provides a filter's filter core backflushing device, including filter jar and the top cover for enclosing filter jar, the input pipe is connected with filter jar bottom, the output pipe is connected with the top cover one side, the filter core is arranged in filter jar inside, and the filter core is installed in filter jar and top cover junction, the fixed connection of inside of top cover is equipped with the mounting plate, the bottom of mounting plate is detachably connected with the cleaning mechanism for cleaning filter core, the cleaning mechanism includes fixed sealing ring, positioning plate and a plurality of cleaning components, the fixed sealing ring is detachably connected to the bottom of mounting plate, the positioning plate is fixedly connected in the fixed sealing ring, a plurality of through holes corresponding with the core rod of filter core are formed in the positioning plate, all the cleaning components are rotatably arranged at the bottom of positioning plate and are respectively located below the plurality of through holes, the vacuum adsorption pipe is communicated with the bottom of filter jar one side, and the connecting pipe is connected with the top of top cover.

[0008] As a preferred scheme of the utility model, the cleaning mechanism of the cleaning component includes a hollow tube cleaning mechanism, a rotating seat cleaning mechanism, and a plurality of nozzle cleaning mechanisms. The hollow tube cleaning mechanism is fixedly arranged at the bottom of the positioning plate cleaning mechanism and is communicated with the corresponding through hole cleaning mechanism. The rotating seat cleaning mechanism is rotatably arranged at the bottom of the hollow tube cleaning mechanism and is communicated with the hollow tube cleaning mechanism. The plurality of nozzle cleaning mechanisms are uniformly arranged on the outer side of the rotating seat cleaning mechanism in the circumferential direction, and all the nozzle cleaning mechanisms are communicated with the rotating seat cleaning mechanism.

[0009] As a preferred scheme of the utility model, the cleaning component includes a fixed sleeve, a rotating sleeve, an extension tube, and a spiral blade. The fixed sleeve is fixedly connected to the bottom of the positioning plate and is communicated with the corresponding through hole. The rotating sleeve is sleeved on the outside of the fixed sleeve and is rotatably connected with the fixed sleeve. The extension tube is limitingly and slidingly connected to the outside of the fixed rotating sleeve. The spiral blade is fixedly connected to the inside of the rotating sleeve. A spring is fixedly connected to the inner bottom wall of the extension tube, and the top of the spring is fixedly connected with the bottom of the spiral blade. A plurality of openings are formed in the outer walls of the rotating sleeve and the extension tube. When the external pressure medium is delivered to the inside of the rotating sleeve, the pressure medium can push the rotating sleeve to rotate and push the extension tube to move downward.

[0010] As a preferred scheme of the utility model, the outer wall of the extension tube is provided with a cleaning brush. When the extension tube extends into the inside of the core rod of the filter core, the cleaning brush abuts against the inner wall of the core rod.

[0011] As a preferred scheme of the utility model, a sending inlet is formed in the middle of the mounting plate, and a one-way valve is arranged in the inside of the sending inlet.

[0012] As a preferred scheme of the present application, the output pipe is located below the mounting plate, and the height of the fixed sealing ring is equal to the gap distance between the mounting plate and the filter core. When the fixed sealing ring is installed at the bottom of the mounting plate, the passage between the output pipe and the filter pipe is closed.

[0013] As a preferred scheme of the present application, the length of the telescopic pipe is greater than that of the rotating sleeve pipe, and the diameter of the telescopic pipe is smaller than the inner diameter of the core rod of the filter core.

[0014] As a preferred scheme of the present application, the rotating sleeve pipe and the telescopic sleeve pipe are both made of stainless steel material.

[0015] As a preferred scheme of the present application, the bottom of the telescopic pipe is closed.

[0016] Compared with the prior art, the present application has the following beneficial effects: By the arrangement of the cleaning mechanism, the present application realizes efficient cleaning of the inner wall of the filter core. In the cleaning process, the gas serves as a power source, which not only drives the rotation and telescoping of the cleaning assembly, but also forms a rotating gas flow through the injection of high-pressure gas. This rotating gas flow can comprehensively and deeply clean the silicon powder residues on the inner wall of the filter core. In addition, due to the limiting sliding connection design of the telescopic pipe and the rotating sleeve pipe, the telescopic pipe can automatically move downward and rotate under the pushing of the gas, further enhancing the cleaning effect. The present application not only improves the cleaning efficiency, but also realizes the automation of the cleaning process, greatly reducing the burden of manual maintenance. The cleaned filter core can be repeatedly used, thereby prolonging the service life of the filter core and reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0018] Figure 1 The present application provides a whole structure schematic diagram of a filter core backflushing device of a filter; Figure 2 The present application provides a front view structure sectional view of a filter core backflushing device of a filter; Figure 3 The present application provides a cleaning mechanism and filter core connection structure schematic diagram; Figure 4 The present application provides a structure schematic diagram of embodiment 1 of a cleaning assembly; Figure 5 Provides a structural schematic diagram of a cleaning component embodiment 2 of the present invention; Figure 6 Provides a front structural cross-sectional view of a cleaning assembly embodiment 2 of the present invention; Figure 7 The present invention provides Figure 6 A magnified view of the structure at point A; Figure 8 The present invention provides Figure 6 A magnified view of the structure at point B.

[0019] The numbers in the figure represent the following: 1. Filter tank; 2. Top cover; 3. Inlet pipe; 4. Outlet pipe; 5. Filter element; 6. Cleaning mechanism; 7. Fixed sealing ring; 8. Positioning plate; 9. Cleaning assembly; 10. Through hole; 21. Mounting plate; 22. Vacuum adsorption tube; 23. Connecting tube; 24. Inlet; 91. Fixed ring; 92. Rotating sleeve; 93. Telescopic tube; 94. Spiral blade; 95. Spring; 96. Opening; 97. Cleaning brush; 98. Hollow tube; 99. Rotating seat; 90. Nozzle. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1 like Figure 1 - Figure 4As shown, the present invention provides a filter element backwashing device for a filter, comprising a filter tank 1 and a top cover 2 for closing the filter tank 1, the bottom of the filter tank 1 is connected to an inlet pipe 3, and one side of the top cover 2 is connected to an outlet pipe 4, a filter element 5 is fixedly arranged inside the filter tank 1, and the filter element 5 is installed at the connection between the filter tank 1 and the top cover 2, a mounting plate 21 is fixedly connected inside the top cover 2, a feed inlet 24 is opened in the middle of the mounting plate 21, and a one-way valve is arranged inside the feed inlet 24, and a cleaning mechanism 6 for cleaning the filter element 5 is detachably connected to the bottom of the mounting plate 21, the cleaning mechanism 6 includes a fixed sealing ring 7, a positioning plate 8 and a plurality of cleaning components 9, the fixed sealing ring 7 is detachably connected to the bottom of the mounting plate 21, the positioning plate 8 is fixedly connected to the inside of the fixed sealing ring 7, a plurality of through holes 10 corresponding to the filter rods of the filter element 5 are opened on the positioning plate 8, and all cleaning components 9 are rotatably arranged at the bottom of the positioning plate 8, and are respectively located directly below the plurality of through holes 10, a vacuum adsorption pipe 22 is connected to one side of the bottom of the filter tank 1, and a connecting pipe 23 is connected to the top of the top cover 2.

[0022] The filter element 5 of the present invention comprises a plurality of evenly spaced filter rods, each having a plurality of filter holes. During use, silicon powder is transported from the inlet pipe 3 into the filter tank 1, filtered by the plurality of filter rods on the filter element 5, and discharged through the outlet pipe 4, thereby completing the filtration of the silicon powder.

[0023] When the cleaning mechanism 6 of the present invention is working, if the filter element 5 in the filter tank 1 is small and the number of filter rods is small, the air pressure is sufficient at this time, and the air pressure conditions meet the one-to-one cleaning of the filter rods by all cleaning components 9. If the filter tank 1 is large, the number of filter rods in its filter element 5 is also relatively large. At this time, the air pressure conditions cannot meet the cleaning of the filter element 5 in such a large-capacity filter tank 1. Therefore, under this condition, the number of cleaning components 9 is set to one row or one column according to the arrangement of the filter rods of the filter element 5, and a rotating mechanism for driving the group of cleaning components 9 to rotate and a horizontal adjustment mechanism for driving the group of cleaning components 9 to move horizontally or vertically are provided at the bottom of the mounting plate 21 to adjust the arrangement of the group of cleaning components 9 and clean a whole group or a whole column according to the arrangement of the filter rods of the filter element 5 to ensure that the impact force of the air pressure meets the cleaning requirements when the cleaning component 9 is used.

[0024] Among them, the rotating mechanism is a motor and turntable combination structure in the prior art, or any mechanism and equipment that can be used to drive the group of cleaning components 9 to rotate. The horizontal adjustment mechanism is two groups of cross-distributed screw slides in the prior art, or any method that can adjust the cleaning component 9 to move horizontally to complete the rearrangement. The above-mentioned rotating mechanism and horizontal adjustment are both prior art, so they are not shown in the figure, and their working principles are not described in detail.

[0025] The cleaning assembly 9 includes a hollow tube 98, a rotating seat 99 and multiple nozzles 90. The hollow tube 98 is fixedly set at the bottom of the positioning plate 8 and is connected to the corresponding through hole 10. The rotating seat 99 is rotatably set at the bottom of the hollow tube 98 and is connected to the hollow tube 98. Multiple nozzles 90 are evenly arranged on the outside of the rotating seat 99 along the circumferential direction, and all nozzles 90 are connected to the rotating seat 99.

[0026] When the filter element 5 needs to be cleaned, first, the inlet pipe 3 and the outlet pipe 4 are closed to ensure that the interior of the filter tank 1 is in a closed state. Next, high-pressure gas is fed into the top cover 2 through the connecting pipe 23, and the high-pressure gas enters the cavity between the cleaning mechanism 6 and the mounting plate 21 through the inlet 24. Then, the gas is diverted to the multiple cleaning components 9 through the multiple through holes 10 on the positioning plate 8. After the gas enters the hollow tube 98 through the through hole 10, it is transported to the rotating seat 99 along the bottom of the hollow tube 98 and ejected from the multiple nozzles 90. Since the rotating seat 99 and the hollow tube 98 are rotatably connected, when the high-pressure gas ejected from the nozzle 90 hits the inner wall of the filter element 5, a certain reaction force is generated, so that the rotating seat 99 drives the nozzle 90 to rotate around the axis of the hollow tube 98. The rotation of the rotating seat 99 drives the nozzle 90 to spirally eject gas, so that the impact force of the high-pressure gas can effectively remove impurities and particulate matter attached to the filter element 5, restore its filtering performance, and achieve rapid cleaning of the filter element 5, greatly improving the maintenance efficiency and service life of the equipment.

[0027] It is worth noting that in order to ensure the rotation effect of the connecting seat, the multiple nozzles 90 are arranged as curved oblique nozzles to ensure that the jet air flow forms a spiral shape.

[0028] Furthermore, in order to ensure the cleaning effect of the nozzle 90, a lifting mechanism for driving all cleaning components 9 to be raised and lowered can be provided at the bottom of the mounting plate 21. The lifting mechanism can be an electric push rod in the prior art, or any mechanism or device that can drive the cleaning components 9 to be raised and lowered. This is the prior art, so it is shown in the figure, and its structure and working method will not be described in detail. In addition, by providing a lifting mechanism, all cleaning components 9 can be driven to move up and down along the length direction of the inner wall of the filter rod, which not only expands the cleaning range, but also ensures that all parts of the inner wall of the filter rod of the filter element 5 can be fully cleaned. Moreover, since the lifting mechanism can adjust the moving speed and stroke according to actual needs, it can flexibly adapt to filter elements 5 of different lengths and diameters, further improving the versatility and practicality of the equipment.

[0029] Example 2 like Figure 1 、 Figure 3 、 Figure 5 - Figure 8As shown, the present invention provides a filter element backwashing device for a filter, comprising a filter tank 1 and a top cover 2 for closing the filter tank 1, the bottom of the filter tank 1 is connected to an inlet pipe 3, and one side of the top cover 2 is connected to an outlet pipe 4, a filter element 5 is fixedly arranged inside the filter tank 1, and the filter element 5 is installed at the connection between the filter tank 1 and the top cover 2, a mounting plate 21 is fixedly connected inside the top cover 2, a feed inlet 24 is opened in the middle of the mounting plate 21, and a one-way valve is arranged inside the feed inlet 24, and a cleaning mechanism 6 for cleaning the filter element 5 is detachably connected to the bottom of the mounting plate 21, the cleaning mechanism 6 includes a fixed sealing ring 7, a positioning plate 8 and a plurality of cleaning components 9, the fixed sealing ring 7 is detachably connected to the bottom of the mounting plate 21, the positioning plate 8 is fixedly connected to the inside of the fixed sealing ring 7, a plurality of through holes 10 corresponding to the filter rods of the filter element 5 are opened on the positioning plate 8, and all cleaning components 9 are rotatably arranged at the bottom of the positioning plate 8, and are respectively located directly below the plurality of through holes 10, a vacuum adsorption pipe 22 is connected to one side of the bottom of the filter tank 1, and a connecting pipe 23 is connected to the top of the top cover 2.

[0030] The filter element of the present invention comprises a plurality of evenly spaced filter rods, each having a plurality of filter holes. During use, silicon powder is transported from an inlet pipe 3 into the filter tube, filtered by the multiple filter rods on the filter element 5, and discharged through an outlet pipe 4, completing the filtration of the silicon powder.

[0031] When cleaning the filter element 5, the following steps are performed: First, close the inlet pipe 3 and the outlet pipe 4 to ensure that the interior of the filter canister 1 is sealed. Next, high-pressure gas is introduced into the top cover 2 through the connecting pipe 23. The high-pressure gas enters the cavity between the cleaning mechanism 6 and the mounting plate 21 through the inlet 24. Due to the one-way valve inside the inlet 24, the gas can only flow in one direction, preventing the gas from entering the top cover 2 from the connecting pipe 23 during filtration. Once the gas enters the top cover 2, it enters the fixed sealing ring 7 through the inlet 24. As the air pressure inside the fixed sealing ring 7 continues to increase, the gas pressure pushes the cleaning mechanism 6 downward, causing the cleaning assembly 9 to move downward and extend, diverting the gas flow into the filter rod, thereby flushing the interior of the filter element 5 with high-pressure gas, effectively removing the silicon powder residue attached to the filter element 5. As the high-pressure gas continues to flow, the vacuum adsorption tube 22 is simultaneously activated, and the negative pressure is used to suck the washed silicon powder residue and impurities out from the bottom of the filter canister 1, further ensuring the thoroughness of the cleaning. After cleaning, stop feeding high-pressure gas and close the vacuum adsorption tube 22. At this time, the cleaning mechanism 6 is reset. In addition, since the cleaning assembly 9 is rotatable, it is possible to ensure that the inside of the filter rod is fully flushed without dead angles, further improving the cleaning effect.

[0032] It is worth noting that, since the cleaning mechanism 6 is detachably connected with the mounting plate 21, the filtering of the silicon powder and the cleaning of the filter core 5 are carried out in two stages. During the daily operation of the filter tank 1, the cleaning mechanism 6 is not installed in the filter tank 1. Only when the filtering effect is reduced due to the attachment of dust after the filter tank 1 has been operated for a period of time and needs to be cleaned, the filter tank 1 is stopped, at this time, the top cover 2 at the upper part of the filter tank 1 is opened, the cleaning mechanism 6 is installed in the filter tank 1, and the fixed sealing ring 7 of the cleaning mechanism 6 is fixedly connected at the bottom of the mounting plate 21 by bolts or buckles. After the fixed sealing ring 7 is installed at the bottom of the mounting plate 21, a plurality of cleaning assemblies 9 are inserted into a plurality of filter rods of the filter core 5, and then the filter core 5 is further fixed in the filter tank 1 through the top cover 2.

[0033] Further, the cleaning assembly 9 comprises a fixed sleeve 91, a rotating sleeve 92, an extension tube 93 and a spiral blade 94. The fixed sleeve 91 is fixedly connected to the bottom of the positioning plate 8 and communicates with the corresponding through hole 10. The rotating sleeve 92 is sleeved outside the fixed sleeve 91 and is rotatably connected with the fixed sleeve 91. The extension tube 93 is limitingly and slidingly connected outside the fixed rotating sleeve. The spiral blade 94 is fixedly connected inside the rotating sleeve 92. The spring 95 is fixedly connected to the inner bottom wall of the extension tube 93, and the top of the spring 95 is fixedly connected with the bottom of the spiral blade 94. A plurality of openings 96 are formed in the outer walls of the rotating sleeve 92 and the extension tube 93. When the external pressure medium is delivered into the rotating sleeve 92, the pressure medium can push the rotating sleeve 92 to rotate and push the extension tube 93 to move downward.

[0034] The bottom of the extension tube 93 is closed.

[0035] When the gas enters the cavity inside the mounting plate 21 and the fixed sealing ring 7, it is shunted into the plurality of cleaning assemblies 9 through the plurality of through holes 10. When the gas enters the rotating sleeve 92 through the fixed sleeve 91, it first impacts on the spiral blade 94, thereby pushing the spiral blade 94 to rotate. Since the spiral blade 94 is fixedly connected inside the rotating sleeve 92, it can make the rotating sleeve 92 rotate under the pushing of the gas pressure. Then the gas enters the extension tube 93 along the spiral blade 94. Since the extension tube 93 is limitingly and slidingly arranged with the rotating sleeve 92, and the bottom of the extension tube 93 is closed, the gas pressure can push the extension tube 93 to move downward. During the downward movement of the extension tube 93, the spring 95 is stretched. When the extension tube 93 moves to the limit position, the tension of the spring 95 and the pushing force of the gas pressure reach a balanced state. At this time, the spiral blade 94 and the rotating sleeve 92 continue to rotate under the continuous pushing of the gas, and the high-pressure gas is sprayed out from the openings 96. Due to the arrangement of the spiral blade 94, the high-pressure gas sprayed out from the openings 96 can form a rotating gas flow to clean the inner wall of the filter rod of the filter core 5.

[0036] Due to the limited sliding connection between the telescopic tube 93 and the rotating sleeve 92, when the rotating sleeve 92 rotates, it can further drive the telescopic tube 93 to rotate. In addition, since the bottom of the telescopic tube 93 is closed, gas accumulates in the telescopic tube 93. When the air pressure reaches a certain level, the gas will be released to the outside through the opening 96 on the outer wall of the telescopic tube 93 and the rotating sleeve 92. During this process, the release of gas will generate a certain impact force, which helps to further clean the stubborn impurities on the inner wall of the filter element 5. After cleaning is completed, the gas input is turned off. At this time, the spring 95 loses the thrust from the air pressure and resets, allowing the telescopic tube 93 to automatically retract to its initial position. This process does not require additional energy consumption. The entire cleaning process is efficient and automatic, greatly improving the maintenance efficiency and cleanliness of the filter element 5. It is worth noting that in the present invention, the pressure medium supplied to the connecting pipe 23 can be gas or liquid, and the specific use and adjustment can be selected according to actual conditions.

[0037] The present invention achieves efficient cleaning of the inner wall of the filter element 5 by providing a cleaning mechanism 6. During the cleaning process, gas, as a power source, not only drives the rotation and extension of the cleaning assembly 9, but also forms a rotating airflow through the injection of high-pressure gas. This rotating airflow can comprehensively and deeply clean the silicon powder residue on the inner wall of the filter element 5. In addition, due to the limited sliding connection design of the telescopic tube 93 and the rotating sleeve 92, the telescopic tube 93 can automatically move downward and rotate under the push of the gas, further enhancing the cleaning effect, not only improving the cleaning efficiency, but also realizing the automation of the cleaning process. The cleaned filter element 5 can be reused many times, thereby extending the service life of the filter element 5 and reducing production costs.

[0038] Furthermore, a cleaning brush 97 is provided on the outer wall of the telescopic tube 93 . When the telescopic tube 93 is extended into the interior of the filter rod of the filter element 5 , the cleaning brush 97 comes into contact with the inner wall of the filter rod.

[0039] By arranging a cleaning brush 97 on the outer wall of the telescopic tube 93, the cleaning brush 97 can brush the inner wall of the filter rod when the telescopic tube 93 extends into and moves through the interior of the filter rod, effectively removing silicon powder attached to the wall surface, further improving cleaning efficiency and practicality.

[0040] The output tube 4 is located below the mounting plate 21, and the height of the fixed sealing ring 7 is equal to the gap between the mounting plate 21 and the filter element 5. When the fixed sealing ring 7 is installed at the bottom of the mounting plate 21, the passage between the output tube 4 and the filter tube is sealed. When the fixed sealing ring 7 is fixed to the bottom of the mounting plate 21, it can seal the passage between the output tube 4 and the filter tube, enhancing the sealing performance, preventing gas from entering and leaking into the output tube 4, and ensuring the effective transmission and utilization of high-pressure gas.

[0041] The telescopic tube 93 is longer than the rotating sleeve 92, and its diameter is smaller than the inner diameter of the filter element 5. This allows the telescopic tube 93 to smoothly extend and retract within the filter element 5 without encountering excessive resistance. Furthermore, the smaller diameter of the telescopic tube 93 than the inner diameter of the filter element 5 ensures that the telescopic tube 93 does not generate excessive friction with the filter rod during extension and retraction, thereby extending the service life of the device.

[0042] The rotating sleeve 92 and the telescopic sleeve spiral blade 94 are all made of stainless steel. Stainless steel has high strength and can withstand large impact forces.

[0043] The scope of protection of the application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A filter element backwashing device for a filter, comprising a filter tank (1) and a top cover (2) for closing the filter tank (1), characterized in that: The bottom of the filter tank (1) is connected to an input pipe (3), and one side of the top cover (2) is connected to an output pipe (4). A filter core (5) is provided inside the filter tank (1), and the filter core (5) is installed at the connection between the filter tank (1) and the top cover (2). A mounting plate (21) is fixedly connected inside the top cover (2), and a cleaning mechanism (6) for cleaning the filter core (5) is detachably connected to the bottom of the mounting plate (21). The cleaning mechanism (6) includes a fixed sealing ring (7), a positioning plate (8) and a plurality of cleaning The assembly (9) is provided with a fixed sealing ring (7) which is detachably connected to the bottom of the mounting plate (21); the positioning plate (8) is fixedly connected to the inside of the fixed sealing ring (7); the positioning plate (8) is provided with a plurality of through holes (10) corresponding to the core rods of the filter element (5); all the cleaning assemblies (9) are rotatably arranged at the bottom of the positioning plate (8) and are respectively located directly below the plurality of through holes (10); a vacuum adsorption tube (22) is connected to one side of the bottom of the filter tank (1); and a connecting tube (23) is connected to the top of the top cover (2).

2. The filter element backwashing device of a filter according to claim 1, characterized in that: The cleaning assembly (9) includes a hollow tube (98), a rotating seat (99) and a plurality of nozzles (90), wherein the hollow tube (98) is fixedly arranged at the bottom of the positioning plate (8) and is communicated with the corresponding through hole (10), the rotating seat (99) is rotatably arranged at the bottom of the hollow tube (98) and is communicated with the hollow tube (98), and the plurality of nozzles (90) are evenly arranged on the outside of the rotating seat (99) along the circumferential direction, and all the nozzles (90) are communicated with the rotating seat (99).

3. The filter element backwashing device of a filter according to claim 1, characterized in that: The cleaning assembly (9) includes a fixed ring (91), a rotating sleeve (92), a telescopic tube (93) and a spiral blade (94), wherein the fixed ring (91) is fixedly connected to the bottom of the positioning plate (8) and communicates with the corresponding through hole (10), the rotating sleeve (92) is sleeved on the outside of the fixed ring (91) and is rotatably connected to the fixed ring (91), the telescopic tube (93) is limitedly slidably connected to the outside of the fixed rotating ring, the spiral blade (94) is fixedly connected to the inside of the rotating sleeve (92), a spring (95) is fixedly connected to the inner bottom wall of the telescopic tube (93), and the top of the spring (95) is fixedly connected to the bottom of the spiral blade (94), and the outer walls of the rotating sleeve (92) and the telescopic tube (93) are both provided with a plurality of openings (96); When the external pressure medium is delivered to the interior of the rotating sleeve (92), the pressure medium can push the rotating sleeve (92) to rotate and push the telescopic tube (93) to move downward.

4. The filter element backwashing device of a filter according to claim 3, characterized in that: A cleaning brush (97) is provided on the outer wall of the telescopic tube (93). When the telescopic tube (93) extends into the interior of the core rod of the filter element (5), the cleaning brush (97) comes into contact with the inner wall of the core rod.

5. The filter element backwashing device of a filter according to claim 1, characterized in that: A feed inlet (24) is provided in the middle of the mounting plate (21), and a one-way valve is provided inside the feed inlet (24).

6. The filter element backwashing device of a filter according to claim 3, characterized in that: The output pipe (4) is located below the mounting plate (21), and the height of the fixed sealing ring (7) is equal to the gap distance between the mounting plate (21) and the filter element (5); When the fixed sealing ring (7) is installed on the bottom of the mounting plate (21), the passage between the output pipe (4) and the filter pipe is closed.

7. The filter element backwashing device of a filter according to claim 3, characterized in that: The length of the telescopic tube (93) is greater than that of the rotating sleeve (92), and the diameter of the telescopic tube (93) is smaller than the inner diameter of the core rod of the filter element (5).

8. The filter element backwashing device of a filter according to claim 3, characterized in that: The rotating sleeve (92) and the telescopic sleeve spiral blades (94) are both made of stainless steel.

9. The filter element backwashing device of a filter according to claim 3, characterized in that: The bottom of the telescopic tube (93) is closed.

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