An automatic cleaning filter device

Abstract

The present invention belongs to the technical field of filter devices, and specifically relates to an automatic cleaning filter device, comprising a pipe body, a filter body for accommodating the filter device is provided on the pipe body, a filter screen for filtering is provided on the inner side of the filter body, a valve cover is provided at one end of the filter body away from the pipe body, and the valve cover is detachably connected to the filter body; a floating scraper that can slide relative to the inner side of the filter screen is provided; the outer wall of the floating scraper fits the inner wall of the filter screen, and a plurality of filter windows for fluid to pass through are provided around the floating scraper, and the fluid enters the filter screen after passing through the filter windows. The present invention adds a floating scraper that can float up and down on the inner side of the filter screen; when the filter screen is clogged with impurities, the pressure in the lower chamber of the floating scraper increases and drives the floating scraper to move upward, thereby realizing the function of the floating scraper to automatically clean the impurities on the inner wall of the filter screen, thereby extending the service life of the filter screen and reducing the frequency of manual cleaning of the filter screen.

Description

Technical Field

[0001] The invention belongs to the technical field of filter devices, and in particular relates to an automatic cleaning filter device. Background Art

[0002] Y-type strainers are an indispensable filtering device in piping systems. They are typically installed at the inlet of pressure reducing valves, pressure relief valves, constant water level valves, or other equipment to remove impurities from the fluid, protecting the valves and equipment. When fluid enters the strainer through the pipe inlet, solid impurity particles are trapped within the strainer, while clean fluid passes through the strainer and is discharged from the pipe outlet. However, existing Y-type strainers, after a period of use, tend to retain filtered impurities, affecting the filtration efficiency. Consequently, frequent manual cleaning of the strainer is required, resulting in significant labor waste.

[0003] In view of the above problems, it is particularly important to design a filtering device that can automatically clean impurities in the filter. 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 automatic cleaning filter device.

[0005] In order to solve the above technical problems, the present invention provides an automatic cleaning filter device, including a pipe main body, a filter body for accommodating the filter device is provided on the pipe main body, the filter body is a hollow structure, the inner side of the filter body is provided with a filter screen for filtering, and the filter body is provided with a valve cover at one end away from the pipe main body, and the valve cover is detachably connected to the filter body; the inner side of the filter screen is provided with a floating scraper that can slide relative to it, and the upper and lower height dimensions of the floating scraper are smaller than the upper and lower height dimensions of the filter screen; the outer wall of the floating scraper is in contact with the inner wall of the filter screen, and a plurality of filter windows for fluid to pass through are provided around the floating scraper, and the fluid enters the filter screen after passing through the filter windows, and a partition is provided in the middle of the floating scraper, and the partition divides the interior of the floating scraper into two parts, an upper chamber and a lower chamber, and the lower chamber is connected to the pipe inlet.

[0006] The present invention adds a floating scraper that can float up and down on the inner side of the filter, and makes the outer wall of the floating scraper fit with the inner wall of the filter; when the filter is clogged with impurities, the pressure in the lower cavity of the floating scraper increases and drives the floating scraper to move upward, thereby realizing the function of the floating scraper to automatically clean the impurities on the inner wall of the filter, extending the service life of the filter and reducing the frequency of manual cleaning of the filter.

[0007] Preferably, the partition is provided with a plug rod that can slide relative to it, and the upper end of the plug rod is provided with a connecting 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, and an elastic member is provided between the valve cover and the partition, and the elastic member can make the floating scraper be in the lower end position.

[0008] Preferably, a force storage device is provided on the plug rod, and the force storage device can contact the partition and limit the movement of the partition relative to the plug rod. The force storage device includes a force storage plunger that can contact the partition, and the force storage plunger can slide relative to the plug rod. The outer circumferential surface of the plug rod is provided with a plunger mounting hole from the outside to the inside, and the force storage plunger is arranged on the inner side of the plunger mounting hole, and a limit sleeve is provided inside the end of the plunger mounting hole close to the outside, and the limit sleeve is slidably connected to the force storage plunger. A limit block piece for limiting its position is provided on the outside of the force storage plunger, and the limit block piece is provided on the inner side of the plunger mounting hole, and the limit block piece can contact the limit sleeve; a force storage spring is provided between the force storage plunger and the plunger mounting hole, and the force storage spring can make the force storage plunger be in the ejection position.

[0009] Preferably, a retention box for temporarily storing impurities is provided in the upper chamber of the floating scraper screen. The retention box is hollow and has filter holes on the outer wall. The retention box is fixed to the upper part of the connecting rod. A limiting sleeve extending inwardly is provided on the side of the retention box close to the partition. The limiting sleeve passes through the inner side of the retention box and the upper chamber of the floating scraper screen. When the partition is within the height range of the connecting rod, the fluid in the lower chamber of the floating scraper screen enters the inner side of the retention box from the inner side of the limiting sleeve.

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

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0013] Figure 2 A schematic diagram of another aspect of the present invention;

[0014] Figure 3 Schematic diagram of the internal structure of the present invention;

[0015] Figure 4 This is a schematic diagram of the installation of another elastic member of the present invention;

[0016] Figure 5 This is a schematic structural diagram of the floating scraper net of the present invention;

[0017] Figure 6 This is a schematic diagram of the installation of the retention box of the present invention;

[0018] Figure 7 This is a schematic structural diagram of another elastic member of the present invention;

[0019] Figure 8 This is a partial enlarged schematic diagram of point B of the present invention;

[0020] Figure 9 This is a schematic diagram of the dimensional relationship between the retention box and the partition of the present invention;

[0021] Figure 10 Schematic diagram of the installation position of the rubber pad of the present invention;

[0022] In the figure: 100 - pipe body, 101 - pipe inlet, 102 - pipe outlet, 201 - filter body, 202 - valve cover, 203 - filter screen, 204 - floating scraper screen, 205 - plug rod, 206 - connecting rod, 207 - elastic member, 208 - partition, 209 - filter window, 210 - fixing rod, 211 - moving rod, 212 - limiting convex ring, 213 - telescopic spring, 214 - telescopic rubber waterproof sleeve, 215 - plunger mounting hole, 216 - limiting sleeve, 217 - storage plunger, 218 - limiting baffle, 219 - storage spring, 220 - retention box, 221 - limiting sleeve, 222 - rubber pad; DETAILED DESCRIPTION

[0023] Refer to the attached Figures 1 to 3 The present invention provides a filtering device with an automatic cleaning function, including a pipe body 100, a filter body 201 for accommodating the filtering device is provided on the pipe body 100, the filtering device can be a filter screen, and a pipe inlet 101 and a pipe outlet 102 for fluid to pass through are respectively provided at both ends of the pipe body 100, a filter body 201 is provided between the pipe inlet 101 and the pipe outlet 102, the filter body 201 passes through the pipe body 100, and the pipe inlet 101 and the pipe outlet 102 are mutually connected through the filter body 201.

[0024] The filter body 201 has a hollow structure, and its upper and lower ends are interconnected. A filter screen 203 for filtering is provided on the inner side of the filter body 201. The filter screen 203 has a hollow annular structure. The filter screen 203 is mounted on the inner side of the filter body 201. The axis of the filter screen 203 and the filter body 201 are parallel to each other. 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 the end of the filter body 201 away from the pipeline body 100. A sealing ring is provided between the valve cover 202 and the filter body 201 to prevent fluid overflow. The valve cover 202 and the filter body 201 are detachably connected, 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 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 in the pipe inlet 101 can all enter the interior of the filter screen 203. The other end of the filter screen 203 abuts the valve cover 202. After the valve cover 202 is fixed to the filter body 201, it can limit the filter screen 203 from moving along its axial direction. 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. This structure facilitates the installation of the filter screen 203 and the cleaning of impurities inside the filter body 201.

[0025] The inner side of the filter 203 is provided with a floating scraper 204 that can slide relative to it. The upper and lower height dimensions of the floating scraper 204 are smaller than the upper and lower height dimensions of the filter 203. The outer wall of the floating scraper 204 fits in with the inner wall of the filter 203. Figure 5 The floating scraper 204 is surrounded by a plurality of filter windows 209 for fluid to pass through. The upper and lower adjacent filter windows 209 have a certain distance between them. The fluid first enters the interior of the floating scraper 204 through the pipe inlet 101, and then enters the filter screen 203 through the filter window 209 for filtration.

[0026] A partition 208 is provided in the middle of the floating scraper 204, and the partition 208 is arranged perpendicular to the axis of the floating scraper 204. The partition 208 divides the interior of the floating scraper 204 into two parts, an upper chamber and a lower chamber. The fluid in the upper chamber and the lower chamber of the floating scraper 204 can pass through the filter window 209 on the corresponding side and enter the filter 203 for filtration. The lower chamber is connected to the pipeline inlet 101. A plug rod 205 that can slide relative to it is provided on the partition 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 208. Figure 3In the embodiment, the elastic member 207 can be a spring, and the elastic member 207 can make the floating scraper 204 be in the lower end position, that is, the elastic member 207 applies pre-pressure to the partition 208 to make the floating scraper 204 be in a position away from the valve cover 202.

[0027] The length of the elastic member 207 is limited. When the floating scraper 204 is in the lower position, the distance between the valve cover 202 and the partition 208 is smaller than the length of the elastic member 207 in its freely extended state. This ensures 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 pre-pressure to the floating scraper 204, ensuring that the floating scraper 204 is in the lower position.

[0028] With the above structure, when the filtering device of the present invention is working normally, the floating scraper 204 is in the lower end position under the action of the elastic member 207, and the partition 208 is in contact with the plug rod 205, that is, the partition 208 is within the height range of the plug rod 205. The fluid enters the inner side of the lower cavity of the floating scraper 204 from the pipe inlet 101. Since the partition 208 is within the range of the plug rod 205, the fluid in the lower cavity cannot enter the upper cavity. The fluid flows from the filter window 209 on the floating scraper 204 through the filter screen 203 to realize the filtering function of the fluid. The filtered fluid flows out of the filtering device through the pipe 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 filtration, the impurities gather 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 scraper screen 204 remains unchanged, the filtering effect of the filter screen 203 decreases, and the flow rate of the fluid flowing into the lower cavity of the floating scraper screen 204 remains unchanged, which can cause the pressure in the lower cavity of the floating scraper screen 204 to increase. When the pressure in the lower cavity of the floating scraper screen 204 is greater than the pre-pressure of the elastic member 207, the fluid pressure in the lower cavity can cause the floating scraper screen 204 to move upward, and at the same time compress the elastic member 207, causing the floating scraper screen 204 to move upward. 204 and the filter screen 203 experience relative displacement. Since the outer wall of the floating scraper 204 is in contact with the inner wall of the filter screen 203, the floating scraper 204 can clean impurities on the filter screen 203 within the filter window 209 as it moves relative to the filter screen 203, separating impurities attached to the filter screen 203 from the filter screen 203. The cleaned impurities are then separated from the filter screen 203 and re-mixed with the fluid. After the impurities on the filter screen 203 are cleaned, the filtration efficiency of the filter screen 203 is improved, and the fluid in the lower chamber of the floating scraper 204 is quickly filtered. The pressure in the lower chamber of the floating scraper 204 decreases, and the floating scraper 204 can move downward under the elastic force of the elastic member 207. The up and down movement of the floating scraper 204 cleans impurities on the inner surface of the filter screen 203. After the impurities on the filter screen 203 are cleaned by the above structure, the impurities still remain in the lower cavity of the floating scraper 204 and will continue to accumulate with the flow of the fluid. Since the fluid at the pipe inlet 101 continues to enter, the separated impurities can be concentrated at a position away from the pipe inlet 101, that is, close to the partition 208.Therefore, when the impurities in the lower cavity of the floating scraper 204 accumulate to a certain extent, the cleaned filter 203 will be immediately blocked by the impurities, and the lower cavity of the floating scraper 204 will continue to move upward under the pressure of the fluid. When the floating scraper 204 moves upward, the partition 208 continues to slide relative to the plug rod 205. After the partition 208 moves upward relative to the plug rod 205 to a certain extent, as the floating scraper 204 moves upward, the partition 208 can be separated from the contact with the plug rod 205. When the partition 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 scraper 204 can enter the upper cavity of the floating scraper 204 from the gap between the partition 208 and the connecting rod 206. Since the separated impurities are close to the partition 208, the impurities in the fluid are removed by the flow of the fluid. The lower cavity of the floating scraper 204 enters the upper cavity, reducing the density of impurities in the lower cavity of the floating scraper 204; as the fluid in the lower cavity of the floating scraper 204 continuously enters the upper cavity, the pressure in the lower cavity of the floating scraper 204 decreases, and the floating scraper 204 moves downward under the action of the elastic member 207. The floating scraper 204 moves relative to the filter 203 to clean the impurities on the filter 203, and the filter 203 can filter the fluid again; the floating scraper 204 moves downward, and the partition 208 is again within the height range of the plug rod 205, and the fluid in the lower cavity of the floating scraper 204 cannot enter the upper cavity. At the same time, the fluid in the upper cavity is filtered by the filter 203 and flows out from the pipe outlet 102, and the impurities in the fluid are filtered in the upper cavity of the floating scraper 204, avoiding the accumulation of impurities in the lower cavity of the floating scraper 204, thereby reducing the frequency of the filter 203 being blocked. With the above structure, when impurities accumulate on the filter 203, the floating scraper 204 automatically moves upward, contacting the filter 203 to remove impurities adhering to the surface of the filter 203. By changing the position of the partition 208, when the partition 208 is within the height range of the connecting rod 206, impurities can enter the upper cavity of the floating scraper 204, temporarily storing the impurities. The staff only needs to regularly clean the impurities in the upper cavity of the floating scraper 204. This extends the maintenance period of the filter 203.

[0029] The elastic member 207 can be a spring. When the staff cleans the impurities in the upper cavity of the floating scraper 204, they also clean the impurities on the spring and replace it according to the degree of damage to the spring.

[0030] Therefore, another embodiment of the elastic member 207 is provided, see Figure 4 and Figure 7The elastic member 207 includes a fixed rod 210 and a mobile rod 211 that can move relative to each other. A telescopic spring 213 is provided between the fixed rod 210 and the mobile rod 211. One end of the fixed rod 210 is fixed to the valve cover 202, and the other end of the fixed rod 210 is provided with a telescopic spring 213. The other end of the fixed rod 210 is provided with a limiting round table, which extends into one end of the telescopic spring 213 to limit the position of the telescopic spring 213. The other end of the telescopic spring 213 is sleeved on the end of the mobile rod 211. A limiting convex ring 212 is provided on the mobile rod 211, and the limiting convex ring 212 abuts against the telescopic spring 213. A telescopic rubber waterproof sleeve 214 is sleeved on the outside of the telescopic spring 213. The two ends of the telescopic rubber waterproof sleeve 214 are respectively connected to the fixed rod 210 and the mobile rod 211. The telescopic rubber waterproof sleeve 214 can prevent the fluid from contacting the telescopic spring 213, thereby preventing impurities in the fluid from contacting the telescopic spring 213.

[0031] See also Figure 10 The partition 208 is provided with a rubber pad 222 capable of contacting the plug rod 205. The rubber pad 222 is disposed around the plug rod 205 and is detachably connected to the partition 208. With the above structure, the rubber pad 222 can also slide relative to the plug rod 205 when the partition 208 slides relative to the plug rod 205. Since the rubber pad 222 can contact the plug rod 205, it can remove impurities from the plug rod 205 when sliding relative to the plug rod 205. Furthermore, the rubber pads 222 are provided on both the upper and lower sides of the partition 208 to prevent impurities in the fluid from entering between the partition 208 and the plug rod 205, ensuring the flexibility of the partition 208 in sliding relative to the plug rod 205 and thus providing a seal.

[0032] Preferably, see Figure 3 and Figure 8 The plug rod 205 is provided with a force storage device, which can contact the partition 208 and limit the movement of the partition 208 relative to the plug rod 205 to a certain extent. Figure 8In the embodiment, the force storage device includes a force storage plunger 217 that can contact the partition 208, the force storage plunger 217 can slide relative to the plug rod 205, and the outer circumferential surface of the plug rod 205 is provided with a plunger mounting hole 215 from the outside to the inside. The force storage plunger 217 is arranged on the inner side of the plunger mounting hole 215, and a limiting sleeve 216 is provided inside the end of the plunger mounting hole 215 close to the outside. The limiting sleeve 216 is slidably connected to the force storage plunger 217, and the limiting sleeve 216 can be threadedly connected to the plunger mounting hole 215. In order to avoid relative loosening of the limiting sleeve 216 and the plunger mounting hole 215 caused by fluid impact, a position between the limiting sleeve 216 and the plunger mounting hole 215 can be provided. An anti-loosening agent, such as thread glue, is added between the force storage plunger 217; a limit baffle 218 is provided on the outer side of the force storage plunger 217 for limiting its position, and the limit baffle 218 is arranged on the inner side of the plunger mounting hole 215, and the limit baffle 218 can contact the limit sleeve 216; a force storage spring 219 is provided between the force storage plunger 217 and the plunger mounting hole 215, and the force storage spring 219 can make the force storage plunger 217 be in the ejection position, that is, the force storage spring 219 can make the end of the force storage plunger 217 protrude from the outer surface of the plug rod 205, so that the force storage plunger 217 can contact the partition 208 and limit the sliding of the partition 208 relative to the plug rod 205 to a certain extent.

[0033] Through the above structure, the present invention, when the filter screen 203 is blocked, the pressure in the lower cavity of the floating scraper 204 increases, which can make the floating scraper 204 move upward. When the floating scraper 204 moves upward, the partition 208 can contact the storage plunger 217. Since the storage spring 219 makes the storage plunger 217 in the ejection position, the partition 208 can be restricted by the storage plunger 217 during the upward movement. When the pressure in the lower cavity of the floating scraper 204 is large enough, the upward force of the partition 208 is greater than the force of the storage spring 219 on the storage plunger 217. At this time, the partition 208 can make the storage plunger 217 slide to the inner side of the plunger mounting hole 215, and the partition 208 continues to move upward, that is, the floating scraper 204 is blocked. As the net 204 continues to move upward, when the diaphragm 208 is within the height range of the connecting rod 206, the fluid in the lower chamber of the floating scraper 204 flows from the high-pressure lower chamber to the low-pressure upper chamber. Consequently, the fluid in the lower chamber of the floating scraper 204 can flow into the upper chamber of the floating scraper 204 at a higher velocity. This higher velocity of fluid can more efficiently flush impurities from the lower chamber to the upper chamber. Simultaneously, the high-pressure fluid in the lower chamber of the floating scraper 204 can cause the diaphragm 208 to remain within the height range of the connecting rod 206 for a certain period of time, giving the fluid sufficient flow time to facilitate the flow of impurities from the lower chamber of the floating scraper 204 to the upper chamber. Simultaneously, the high-pressure fluid flow can also flush impurities from the inner wall of the lower chamber of the floating scraper 204. As the fluid flows, the pressure in the lower chamber of the floating scraper 204 decreases, causing the elastic member 207 to move the diaphragm 208 downward and return to its original position, preventing the fluid in the lower chamber of the floating scraper 204 from continuing to flow into the upper chamber.

[0034] Preferably, see Figure 6 The upper cavity of the floating scraper 204 is provided with a retention box 220 for temporarily storing impurities. The retention box 220 is hollow and has filter holes on the outer wall. The retention box 220 is fixed to the upper part of the connecting rod 206. The retention box 220 has a certain volume and extends from one side close to the valve cover 202 to the other side. Figure 9 The minimum distance A between the end of the retention box 220 near the partition 208 and the plug rod 205 is greater than the thickness of the partition 208. A limiting sleeve 221 extending inward is provided on the side of the retention box 220 near the partition 208. The limiting sleeve 221 passes through the interior of the retention box 220 and the upper chamber of the floating scraper 204. With the above structure, when the partition 208 is within the height range of the connecting rod 206, the fluid in the lower chamber of the floating scraper 204 enters the interior of the retention box 220 through the inner side of the limiting sleeve 221. Because the outer wall of the retention box 220 has filter holes, impurities in the fluid are retained inside the retention box 220, preventing excessive accumulation of impurities in the upper chamber of the floating scraper 204. This would increase the weight of the upper chamber of the floating scraper 204, affect the upward mobility of the floating scraper 204, and thus affect the cleaning of impurities in the lower chamber of the floating scraper 204.

[0035] The present invention adds a floating scraper that can float up and down on the inner side of the filter, and makes the outer wall of the floating scraper fit with the inner wall of the filter; when the filter is clogged with impurities, the pressure in the lower cavity of the floating scraper increases and drives the floating scraper to move upward, so that the floating scraper cleans the impurities on the inner wall of the filter, thereby extending the service life of the filter and reducing the frequency of manual cleaning of the filter.

[0036] 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 technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. An automatic cleaning filter device, comprising a pipe body, characterized in that: The pipe body is provided with a filter body for accommodating the filter device, the filter body is a hollow structure, the inner side of the filter body is provided with a filter screen for filtering, the filter body is provided with a valve cover at one end away from the pipe body, and the valve cover is detachably connected to the filter body; the inner side of the filter screen is provided with a floating scraper screen that can slide relative to it, and the upper and lower height dimensions of the floating scraper screen are smaller than the upper and lower height dimensions of the filter screen; the outer wall of the floating scraper screen is in contact with the inner wall of the filter screen, and the periphery of the floating scraper screen is provided with a plurality of filter windows for fluid to pass through, and the fluid After passing through the filter window, it enters the filter screen. A partition is provided in the middle of the floating scraper screen, and the partition divides the interior of the floating scraper screen into two parts, an upper chamber and a lower chamber. The lower chamber is connected to the pipeline inlet; a plug rod that can slide relative to it is provided on the partition, and 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, and the elastic member can make the floating scraper screen be in the lower end position.

2. The automatic cleaning filter device according to claim 1, characterized in that: The piston rod is provided with a force storage device, which can contact the partition and limit the movement of the partition relative to the piston rod. The force storage device includes a force storage plunger that can contact the partition, and the force storage plunger can slide relative to the piston rod. The outer circumferential surface of the piston rod is provided with a plunger mounting hole from the outside to the inside, and the force storage plunger is arranged on the inner side of the plunger mounting hole, and a limit sleeve is provided inside the end of the plunger mounting hole close to the outside, and the limit sleeve is slidably connected to the force storage plunger. A limit block piece for limiting its position is provided on the outside of the force storage plunger, and the limit block piece is arranged on the inner side of the plunger mounting hole, and the limit block piece can contact the limit sleeve; a force storage spring is provided between the force storage plunger and the plunger mounting hole, and the force storage spring can make the force storage plunger be in the ejection position.

3. An automatic cleaning filter device according to any one of claims 1 or 2, characterized in that: A retention box for temporarily storing impurities is provided in the upper chamber of the floating scraper. The retention box is hollow and has filter holes on its outer wall. The retention box is fixed to the upper part of the connecting rod. A limiting sleeve extending inwardly is provided on the side of the retention box close to the partition. The limiting sleeve passes through the inner side of the retention box and the upper chamber of the floating scraper. When the partition is within the height range of the connecting rod, the fluid in the lower chamber of the floating scraper enters the inner side of the retention box from the inner side of the limiting sleeve.

4. The automatic cleaning filter device according to claim 3, characterized in that: The minimum distance between one end of the retention tank close to the partition and the plug rod is greater than the thickness of the partition.

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