Filtering device with automatic cleaning function

Abstract

The invention belongs to the technical field of filtering devices, and particularly relates to an automatic cleaning filtering device which comprises a pipeline main body, a filtering main body used for containing the filtering device is arranged on the pipeline main body, a filtering net used for filtering is arranged on the inner side of the filtering main body, a valve cover is arranged at the end, away from the pipeline main body, of the filtering main body, and the valve cover is detachably connected with the filtering main body; a floating scraping net capable of sliding relative to the filter screen is arranged on the inner side of the filter screen; the outer wall of the floating scraping net is attached to the inner wall of the filter net, a plurality of filter windows for fluid to pass through are formed in the periphery of the floating scraping net, and the fluid enters the filter net after passing through the filter windows. The floating scraping net capable of floating up and down is additionally arranged on the inner side of the filter net; when the filter screen is blocked by impurities, the pressure of the lower cavity of the floating scraping screen is increased, and the floating scraping screen is driven to move upwards, so that the function of automatically cleaning the impurities on the inner wall of the filter screen by the floating scraping screen is realized, the service life of the filter screen is prolonged, and the manual cleaning frequency of the filter screen is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of filtering devices, and particularly relates to an automatically cleaned filtering device. Background Art

[0002] The Y-type filter is an indispensable filtering device in the pipeline system. The Y-type filter is usually installed at the inlet end of a pressure reducing valve, a pressure relief valve, a constant water level valve or other equipment to remove impurities in the fluid to protect the normal use of valves and equipment. When the fluid enters the filter screen through the pipeline inlet, solid impurity particles are blocked inside the filter screen, and the clean fluid passes through the filter screen and is discharged from the pipeline outlet. In the prior art, after the filter screen of the existing Y-type filter is used for a period of time, the filtered impurities will adhere to the filter screen, affecting the filtering effect of the fluid. Therefore, it is necessary to manually clean the filter screen frequently, wasting a lot of manpower.

[0003] In view of the above problems, it is particularly important to design a filtering device that can automatically clean the impurities on the filter screen. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to reduce the cleaning frequency of the filter, and provide an automatically cleaned filtering device.

[0005] To solve the above technical problem, the present invention provides an automatically cleaned filtering device, including a pipeline main body, a filtering main body for accommodating the filtering device is provided on the pipeline main body. The filtering main body is of a hollow structure, and a filter screen for filtering is provided inside the filtering main body. A valve cover is provided at one end of the filtering main body away from the pipeline main body, and the valve cover is detachably connected to the filtering main body; a floating scraping net capable of sliding relative to it is provided inside the filter screen. The vertical height dimension of the floating scraping net is smaller than the vertical height dimension of the filter screen; the outer wall of the floating scraping net is mutually attached to the inner wall of the filter screen. A plurality of filter windows for the fluid to pass through are provided around the floating scraping net. After the fluid passes through the filter windows, it enters the filter screen. A partition plate is provided in the middle of the floating scraping net, and the inner part of the floating scraping net is divided into two parts, an upper cavity and a lower cavity by the partition plate. The lower cavity communicates with the pipeline inlet.

[0006] The present invention adds a floating scraping net that can float up and down inside the filter screen, and makes the outer wall of the floating scraping net attached to the inner wall of the filter screen; when the filter screen is blocked by impurities, the pressure in the lower cavity of the floating scraping net increases and drives the floating scraping net to move upward, realizing the function of automatically cleaning the impurities on the inner wall of the filter screen by the floating scraping net, prolonging the service life of the filter screen, and reducing the manual cleaning frequency of the filter screen.

[0007] Preferably, a plug rod capable of sliding relative to the partition is provided on the partition. A connecting rod is provided at the upper end of the plug rod. The diameter of the connecting rod is smaller than that of the plug rod. One end of the connecting rod is connected to the plug rod, and the other end of the connecting rod is connected to the valve cover. An elastic member is provided between the valve cover and the partition, and the elastic member can make the floating scraping net in the lower position.

[0008] Preferably, a power storage device is provided on the plug rod. The power storage device can contact the partition and limit the movement of the partition relative to the plug rod. The power storage device includes a power storage plunger capable of contacting the partition. The power storage plunger can slide relative to the plug rod. A plunger installation hole is opened from the outside to the inside on the outer circumferential surface of the plug rod. The power storage plunger is arranged inside the plunger installation hole. A limit sleeve is arranged inside the plunger installation hole near the outside end. The limit sleeve is slidably connected with the power storage plunger. A limit retaining piece for limiting its position is arranged outside the power storage plunger. The limit retaining piece is arranged inside the plunger installation hole and can contact the limit sleeve; a power storage spring is arranged between the power storage plunger and the plunger installation hole, and the power storage spring can make the power storage plunger in the ejected position.

[0009] Preferably, a retention box for temporarily storing impurities is arranged in the upper cavity of the floating scraping net. The retention box is hollow and has filter holes on its outer wall. The retention box is fixedly connected to the upper part of the connecting rod. A limiting sleeve extending inward is arranged on one side of the retention box close to the partition. The limiting sleeve penetrates the inside of the retention box and the upper cavity of the floating scraping net. When the partition is within the height range of the connecting rod, the fluid in the lower cavity of the floating scraping net enters the inside of the retention box from the inside of the limiting sleeve.

[0010] Preferably, the minimum distance dimension from one end of the retention box close to the partition to the plug rod is greater than the thickness dimension of the partition. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described in detail below with reference to the drawings and specific embodiments: Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a schematic diagram of the present invention in another direction; Figure 3 is an internal structural schematic diagram of the present invention; Figure 4 is an installation schematic diagram of another elastic member of the present invention; Figure 5 is a structural schematic diagram of the floating scraping net of the present invention; Figure 6 is an installation schematic diagram of the retention box of the present invention; Figure 7 Schematic structural diagram of another elastic member of the present invention; Figure 8 Partial enlarged schematic diagram at position B of the present invention; Figure 9 Schematic diagram of the dimensional relationship between the retention box and the partition of the present invention; Figure 10 Schematic diagram of the installation position of the rubber pad of the present invention; In the figure: 100 - pipeline main body, 101 - pipeline inlet, 102 - pipeline outlet, 201 - filtration main body, 202 - valve cover, 203 - filter screen, 204 - floating scraping net, 205 - plug rod, 206 - connecting rod, 207 - elastic member, 208 - partition, 209 - filtration window, 210 - fixing rod, 211 - moving rod, 212 - limiting convex ring, 213 - telescopic spring, 214 - telescopic rubber waterproof sleeve, 215 - plunger installation hole, 216 - limiting sleeve, 217 - energy storage plunger, 218 - limiting stop piece, 219 - energy storage spring, 220 - retention box, 221 - limiting sleeve, 222 - rubber pad; Specific embodiments

[0012] Referring to the attached Figures 1 to 3 , the present invention provides a filtering device with an automatic cleaning function, including a pipeline main body 100. A filtration main body 201 for accommodating the filtering device is provided on the pipeline main body 100. The filtering device can be a filter screen. Pipeline inlets 101 and pipeline outlets 102 for fluid passage are respectively provided at both ends of the pipeline main body 100. A filtration main body 201 is provided between the pipeline inlet 101 and the pipeline outlet 102. The filtration main body 201 penetrates through the pipeline main body 100. The pipeline inlet 101 and the pipeline outlet 102 are mutually communicated through the filtration main body 201.

[0013] The filter body 201 has a hollow structure, and its upper and lower ends communicate with each other. A filter screen 203 for filtering is provided inside the filter body 201. The filter screen 203 has a hollow annular structure. The filter screen 203 is sleeved inside the filter body 201. The axis of the filter screen 203 is parallel to that of the filter body 201. There is a certain gap between the outer wall of the filter screen 203 and the filter body 201. A valve cover 202 is provided at one end of the filter body 201 away from the pipe body 100. A sealing ring for preventing fluid overflow is provided between the valve cover 202 and the filter body 201. The valve cover 202 is detachably connected to the filter body 201. For example, the valve cover 202 and the filter body 201 are connected by bolts. One end of the filter screen 203 is close to the pipe inlet 101 and abuts against the lower end of the filter body 201. The inner diameter of the filter screen 203 is larger than the inner diameter of the pipe inlet 101, ensuring that the fluid at the pipe inlet 101 can all enter the inside of the filter screen 203. The other end of the filter screen 203 abuts against the valve cover 202. After the valve cover 202 and the filter body 201 are fixed, the filter screen 203 is restricted from moving axially. At the same time, when the valve cover 202 is separated from the filter body 201, the filter screen 203 can be taken out from the upper end of the filter body 201. Through this structure, it is convenient to install the filter screen 203 and clean the impurities inside the filter body 201.

[0014] A floating scraping net 204 that can slide relative to it is provided inside the filter screen 203. The vertical height dimension of the floating scraping net 204 is smaller than the vertical height dimension of the filter screen 203. The outer wall of the floating scraping net 204 fits with the inner wall of the filter screen 203. Refer to Figure 5 , a plurality of filter windows 209 for fluid to pass through are provided around the floating scraping net 204. There is a certain distance between two adjacent upper and lower filter windows 209. The fluid first enters the inside of the floating scraping net 204 through the pipe inlet 101, and then enters the filter screen 203 through the filter windows 209 for filtering.

[0015] A partition plate 208 is provided in the middle of the floating scraping net 204. The partition plate 208 is perpendicular to the axis of the floating scraping net 204. The partition plate 208 divides the inside of the floating scraping net 204 into two parts: an upper cavity and a lower cavity. The fluid in the upper cavity and the lower cavity of the floating scraping net 204 can enter the filter screen 203 through the corresponding filter windows 209 on one side for filtering. The lower cavity communicates with the pipe inlet 101. A plug rod 205 that can slide relative to it is provided on the partition plate 208. A connecting rod 206 is provided at the upper end of the plug rod 205. The diameter of the connecting rod 206 is smaller than the diameter of the plug rod 205. One end of the connecting rod 206 is connected to the plug rod 205, and the other end of the connecting rod 206 is connected to the valve cover 202. An elastic member 207 is provided between the valve cover 202 and the partition plate 208. Figure 3Among them, the elastic member 207 can be a spring, and the elastic member 207 can keep the floating screen 204 in the lower position, that is, the elastic member 207 applies a pre-pressure to the partition plate 208 to keep the floating screen 204 away from the valve cover 202.

[0016] Limit the length dimension of the elastic member 207. When the floating screen 204 is in the lower position, the distance dimension from the valve cover 202 to the partition plate 208 is smaller than the length dimension of the elastic member 207 in the free elongation state. Ensure that when the valve cover 202 is fastened to the filter body 201, the elastic member 207 is in a compressed state, that is, the elastic member 207 applies a pre-pressure to the floating screen 204 to ensure that the floating screen 204 is in the lower position.

[0017] With the above structure, when the filtering device is working properly, the floating scraping net 204 is in the lower position under the action of the elastic member 207, and the partition plate 208 contacts the plug rod 205, that is, the partition plate 208 is within the height range of the plug rod 205. The fluid enters the inner side of the lower cavity of the floating scraping net 204 from the pipeline inlet 101. Since the partition plate 208 is within the range of the plug rod 205, the fluid in the lower cavity cannot enter the upper cavity. The fluid flows through the filter window 209 on the floating scraping net 204 and passes through the filter screen 203 to achieve the filtering function of the fluid. The filtered fluid flows out of the filtering device through the pipeline outlet 102. As the impurities on the filter screen 203 increase, the filtering efficiency of the filter screen 203 decreases. Since the fluid first passes through the filter window 209 and then through the filter screen 203 for filtering, the impurities accumulate in the filter window 209. The flow rate of the fluid in the pipeline remains unchanged, so the flow rate of the fluid flowing into the lower cavity of the floating scraping net 204 remains unchanged. The filtering effect of the filter screen 203 decreases while the flow rate of the fluid flowing into the lower cavity of the floating scraping net 204 remains unchanged, which can cause the pressure in the lower cavity of the floating scraping net 204 to increase. When the pressure in the lower cavity of the floating scraping net 204 is greater than the pre-pressure of the elastic member 207, the fluid pressure in the lower cavity can cause the floating scraping net 204 to move upward, and at the same time compress the elastic member 207, causing a relative displacement between the floating scraping net 204 and the filter screen 203. Since the outer wall of the floating scraping net 204 fits with the inner wall of the filter screen 203, when the floating scraping net 204 moves relative to the filter screen 203, it can clean the impurities on the filter screen 203 that are within the filter window 209, separating the impurities adhering to the filter screen 203 from the filter screen 203. The cleaned impurities are separated from the filter screen 203 and re-mixed in the fluid. After the impurities on the filter screen 203 are cleaned, the filtering efficiency of the filter screen 203 increases, enabling the fluid in the lower cavity of the floating scraping net 204 to be quickly filtered, and the pressure in the lower cavity of the floating scraping net 204 decreases. Under the elastic force of the elastic member 207, the floating scraping net 204 can move downward. The cleaning of the impurities on the inner surface of the filter screen 203 is achieved by the up and down movement of the floating scraping net 204. After cleaning the impurities on the filter screen 203 through the above structure, the impurities still remain in the lower cavity of the floating scraping net 204 and will continue to accumulate as the fluid flows. Since the fluid at the pipeline inlet 101 continuously enters, the separated impurities can be concentrated at a position far from the pipeline inlet 101, that is, a position close to the partition plate 208.Therefore, when the impurities in the lower cavity of the floating scraping net 204 accumulate to a certain extent, the cleaned filter screen 203 will be immediately blocked by the impurities. After the lower cavity of the floating scraping net 204 is subjected to the pressure of the fluid, it will continue to move upward. When the floating scraping net 204 moves upward, the partition plate 208 continues to slide relative to the plug rod 205. After the partition plate 208 moves upward relative to the plug rod 205 to a certain extent, as the floating scraping net 204 moves upward, the partition plate 208 can be separated from the contact with the plug rod 205. When the partition plate 208 is within the height range of the connecting rod 206, since the diameter of the plug rod 205 is larger than the diameter of the connecting rod 206, the fluid in the lower cavity of the floating scraping net 204 can enter the upper cavity of the floating scraping net 204 from the gap between the partition plate 208 and the connecting rod 206. Since the separated impurities are close to the partition plate 208, the impurities in the fluid enter the upper cavity from the lower cavity of the floating scraping net 204 under the flow of the fluid, reducing the impurity density in the lower cavity of the floating scraping net 204. As the fluid in the lower cavity of the floating scraping net 204 continuously enters the upper cavity, the pressure in the lower cavity of the floating scraping net 204 decreases. Under the action of the elastic member 207, the floating scraping net 204 moves downward. The relative movement of the floating scraping net 204 with respect to the filter screen 203 can clean the impurities on the filter screen 203, and the filter screen 203 can filter the fluid again. When the floating scraping net 204 moves downward, the partition plate 208 is again within the height range of the plug rod 205, and the fluid in the lower cavity of the floating scraping net 204 cannot enter the upper cavity. At the same time, the fluid in the upper cavity flows out from the pipeline outlet 102 after being filtered by the filter screen 203, and the impurities in the fluid are filtered and stored in the upper cavity of the floating scraping net 204, avoiding the accumulation of impurities in the lower cavity of the floating scraping net 204 and reducing the frequency of blockage of the filter screen 203. Through the above structure, when impurities accumulate on the filter screen 203, the floating scraping net 204 automatically moves upward. By the mutual contact of the floating scraping net 204 and the filter screen 203, the impurities attached to the surface of the filter screen 203 are removed. By changing the position of the partition plate 208, when the partition plate 208 is within the height range of the connecting rod 206, the impurities can enter the upper cavity of the floating scraping net 204 for temporary storage, and the staff can regularly clean the impurities in the upper cavity of the floating scraping net 204. The maintenance period of the filter screen 203 is extended.

[0018] Among them, the elastic member 207 can be a spring. When the staff cleans the impurities in the upper cavity of the floating scraping net 204, the impurities on the spring are cleaned at the same time, and the spring is replaced according to the degree of damage.

[0019] Therefore, another embodiment of the elastic member 207 is provided. Refer to Figure 4 and Figure 7, the elastic member 207 includes a fixed rod 210 and a movable rod 211 that can move relative to each other. A telescopic spring 213 is provided between the fixed rod 210 and the movable rod 211. One end of the fixed rod 210 is fixedly connected to the valve cover 202, and the other end of the fixed rod 210 is provided with the telescopic spring 213. A frustum for limiting is provided at the other end of the fixed rod 210, and the end of the frustum extending into the telescopic spring 213 is used to limit the position of the telescopic spring 213. The other end of the telescopic spring 213 is sleeved on the end of the movable rod 211. A limiting convex ring 212 is provided on the movable rod 211, and the limiting convex ring 212 abuts against the telescopic spring 213. A telescopic rubber waterproof sleeve 214 is sleeved outside the telescopic spring 213. Two ends of the telescopic rubber waterproof sleeve 214 are respectively connected to the fixed rod 210 and the movable rod 211. The telescopic rubber waterproof sleeve 214 can prevent the fluid from contacting the telescopic spring 213, thereby avoiding the impurities in the fluid from contacting the telescopic spring 213.

[0020] See Figure 10 , a rubber pad 222 that can contact the plug rod 205 is provided on the partition plate 208. The rubber pad 222 is arranged around the plug rod 205, and the rubber pad 222 and the partition plate 208 are detachably connected. With the above structure of the present invention, when the partition plate 208 slides relative to the plug rod 205, the rubber pad 222 can also slide relative to the plug rod 205. Since the rubber pad 222 can contact the plug rod 205, the impurities on the plug rod 205 can be removed when the rubber pad 222 slides relative to the plug rod 205. At the same time, rubber pads 222 are provided on both the upper and lower sides of the partition plate 208, which can prevent the impurities in the fluid from entering between the partition plate 208 and the plug rod 205, can ensure the flexibility of the partition plate 208 sliding relative to the plug rod 205, and play a sealing role.

[0021] Preferably, see Figure 3 and Figure 8 , a power storage device is provided on the plug rod 205. The power storage device can contact the partition plate 208 and limit the movement of the partition plate 208 relative to the plug rod 205 to a certain extent. Figure 8In it, the energy storage device includes an energy storage plunger 217 capable of contacting the partition plate 208. The energy storage plunger 217 can slide relative to the plug rod 205. A plunger mounting hole 215 is formed in the outer circumferential surface of the plug rod 205 from outside to inside. The energy storage plunger 217 is arranged inside the plunger mounting hole 215. A limit sleeve 216 is provided inside the end of the plunger mounting hole 215 close to the outside. The limit sleeve 216 is slidably connected to the energy storage plunger 217 and can be threadedly connected to the plunger mounting hole 215. To prevent the limit sleeve 216 from loosening relative to the plunger mounting hole 215 when impacted by the fluid, an anti-loosening agent, such as thread sealant, can be added between the limit sleeve 216 and the plunger mounting hole 215. A limit retaining piece 218 for restricting its position is provided outside the energy storage plunger 217. The limit retaining piece 218 is arranged inside the plunger mounting hole 215 and can contact the limit sleeve 216. An energy storage spring 219 is provided between the energy storage plunger 217 and the plunger mounting hole 215. The energy storage spring 219 can make the energy storage plunger 217 in the ejected position, that is, the energy storage spring 219 can make the end of the energy storage plunger 217 protrude from the outer surface of the plug rod 205, so that the energy storage plunger 217 can contact the partition plate 208 and restrict the relative sliding of the partition plate 208 relative to the plug rod 205 to a certain extent.

[0022] With the above structure of the present invention, when the filter screen 203 is blocked, the pressure increase in the lower cavity of the floating scraping net 204 can cause the floating scraping net 204 to move upward. When the floating scraping net 204 moves upward, the partition plate 208 can contact the energy storage plunger 217. Since the energy storage spring 219 makes the energy storage plunger 217 in the ejected position, the partition plate 208 can be restricted by the energy storage plunger 217 during the upward movement. When the pressure in the lower cavity of the floating scraping net 204 is large enough, the upward force of the partition plate 208 is greater than the acting force of the energy storage spring 219 on the energy storage plunger 217. At this time, the partition plate 208 can make the energy storage plunger 217 slide to the inside of the plunger mounting hole 215. The partition plate 208 continues to move upward, that is, the floating scraping net 204 continues to move upward. When the partition plate 208 is within the height range of the connecting rod 206, the fluid in the lower cavity of the floating scraping net 204 enters the upper cavity with lower pressure from the lower cavity with high pressure. Therefore, the fluid in the lower cavity of the floating scraping net 204 can enter the upper cavity of the floating scraping net 204 at a higher flow rate. The fluid with a higher flow rate can more efficiently wash the impurities in the lower cavity to the upper cavity. At the same time, the high-pressure fluid in the lower cavity of the floating scraping net 204 can make the partition plate 208 stay for a certain time within the height range of the connecting rod 206, that is, give the fluid a certain flow time to facilitate the impurities in the lower cavity of the floating scraping net 204 to flow to the upper cavity. At the same time, when the high-pressure fluid flows, it can also wash the impurities on the inner wall of the lower cavity of the floating scraping net 204. As the pressure in the lower cavity of the floating scraping net 204 decreases with the flow of the fluid, the elastic member 207 can make the partition plate 208 move downward and reset, and the partition plate 208 prevents the fluid in the lower cavity of the floating scraping net 204 from continuing to flow to the upper cavity.

[0023] Preferably, referring to Figure 6 , a retention tank 220 for temporarily storing impurities is provided in the upper cavity of the floating scraping net 204. The retention tank 220 is hollow and has filter holes on its outer wall. The retention tank 220 is fixedly connected to the upper part of the connecting rod 206. The retention tank 220 has a certain volume and extends from the side close to the valve cover 202 to the other side. Referring to Figure 9 , the minimum distance dimension A from one end of the retention tank 220 close to the partition plate 208 to the plug rod 205 is greater than the thickness dimension of the partition plate 208; a limiting sleeve 221 extending inwards is provided on one side of the retention tank 220 close to the partition plate 208. The limiting sleeve 221 penetrates the inner side of the retention tank 220 and the upper cavity of the floating scraping net 204. With the above structure of the present invention, when the partition plate 208 is within the height range of the connecting rod 206, the fluid in the lower cavity of the floating scraping net 204 enters the inner side of the retention tank 220 from the inner side of the limiting sleeve 221. Since the outer wall of the retention tank 220 is provided with filter holes, the impurities in the fluid are retained inside the retention tank 220, avoiding excessive accumulation of impurities in the upper cavity of the floating scraping net 204, thereby increasing the weight of the upper cavity of the floating scraping net 204 and affecting the flexibility of the upward movement of the floating scraping net 204, and thus affecting the cleaning of impurities in the lower cavity of the floating scraping net 204.

[0024] In the present invention, a floating scraping net that can float up and down is added inside the filter screen, and the outer wall of the floating scraping net is fitted with the inner wall of the filter screen; when the filter screen is blocked by impurities, the pressure in the lower cavity of the floating scraping net increases and drives the floating scraping net to move upwards, realizing the cleaning of impurities on the inner wall of the filter screen by the floating scraping net, prolonging the service life of the filter screen, and reducing the frequency of manual cleaning of the filter screen.

[0025] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. An automatically cleaned filtering device, comprising a pipeline main body, characterized in that, A filter body for accommodating a filtering device is provided on the pipeline main body. The filter body has a hollow structure. A filter screen for filtering is provided inside the filter body. A valve cover is provided at one end of the filter body away from the pipeline main body. The valve cover is detachably connected to the filter body. A floating scraping net capable of sliding relative to it is provided inside the filter screen. The vertical height dimension of the floating scraping net is smaller than the vertical height dimension of the filter screen. The outer wall of the floating scraping net is in mutual contact with the inner wall of the filter screen. A plurality of filter windows for fluid to pass through are provided around the floating scraping net. After the fluid passes through the filter windows, it enters the filter screen. A partition is provided in the middle of the floating scraping net. The partition divides the inside of the floating scraping net into two parts, an upper cavity and a lower cavity. The lower cavity communicates with the pipeline inlet.

2. The automatic cleaning filter device according to claim 1, wherein, A plug rod capable of sliding relative to it is provided on the partition. A connecting rod is provided at the upper end of the plug rod. The diameter of the connecting rod is smaller than the diameter of the plug rod. One end of the connecting rod is connected to the plug rod, and the other end of the connecting rod is connected to the valve cover. An elastic member is provided between the valve cover and the partition. The elastic member can make the floating scraping net in the lower position.

3. An automatically cleaning filtration device according to claim 2, wherein, A power storage device is provided on the plug rod. The power storage device can contact the partition and limit the movement of the partition relative to the plug rod. The power storage device includes a power storage plunger capable of contacting the partition. The power storage plunger can slide relative to the plug rod. A plunger installation hole is opened from the outside to the inside on the outer circumferential surface of the plug rod. The power storage plunger is arranged inside the plunger installation hole. A limit sleeve is provided inside the plunger installation hole near the outside end. The limit sleeve is slidably connected to the power storage plunger. A limit retaining piece for limiting its position is provided outside the power storage plunger. The limit retaining piece is arranged inside the plunger installation hole. The limit retaining piece can contact the limit sleeve. A power storage spring is provided between the power storage plunger and the plunger installation hole. The power storage spring can make the power storage plunger in the ejected position.

4. An automatic cleaning filter device according to any one of claims 2 or 3, characterized in that A retention box for temporarily storing impurities is provided in the upper cavity of the floating scraping net. The retention box is hollow and has filter holes on its outer wall. The retention box is fixedly connected to the upper part of the connecting rod. A limiting sleeve extending inward is provided on one side of the retention box close to the partition. The limiting sleeve penetrates the inside of the retention box and the upper cavity of the floating scraping net. When the partition is within the height range of the connecting rod, the fluid in the lower cavity of the floating scraping net enters the inside of the retention box from the inside of the limiting sleeve.

5. The automatic cleaning filter device according to claim 4, wherein, The minimum distance dimension from one end of the retention box close to the partition to the plug rod is greater than the thickness dimension of the partition.

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