A drainage filter device with self-cleaning function

Abstract

The present invention relates to the technical field of coal mine drainage filter devices, and in particular to a drainage filter device with a self-cleaning function, comprising a shell, a first filter cartridge, a second filter cartridge, a ring plate, and a third filter cartridge, wherein the shell is fixedly arranged, a first cavity and a second cavity are provided in the shell, the first filter cartridge is fixedly arranged in the shell, the second cavity is connected to the first cavity through the first filter cartridge, one end of the second filter cartridge is slidably arranged in the first filter cartridge, the ring plate is fixedly installed at an end of the second filter cartridge away from the first filter cartridge, and the ring plate is located in the first cavity, the third filter cartridge is arranged in the second filter cartridge, and one end of the third filter cartridge is fixedly connected to the ring plate. Through the coordinated arrangement of the second filter cartridge and the ring plate, water in the first cavity will pass through the ring plate and enter the third filter cartridge, and at the same time, impurities in the first cavity will flow into the third filter cartridge through the ring plate, thereby reducing the degree of blockage of the second filter cartridge and increasing the water filtration capacity of the first and second filter cartridges.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine drainage filtering devices, in particular to a drainage filtering device with a self-cleaning function. Background Art

[0002] During the coal mining process, whether in vertical shafts, inclined shafts, adit or open pits, a large amount of water will seep out. If this water is not drained in time, it may cause water accumulation in the mine, posing a serious threat to the lives and safety of miners. Therefore, it is necessary to install drainage devices in coal mines to extract the water out of the mine.

[0003] To ensure safe production in mines, mine sub-areas generally have multiple drainage systems, and are equipped with corresponding water tanks, drainage tunnels and other power supply systems. During the drainage process, impurities in the water and small particles of coal falling into the water will cause blockages in the pipes. After the drainage pipes are blocked, workers need to repair and clean them, which will increase the difficulty of management and require more operators. At the same time, it will cause the gushing water to not be discharged efficiently.

[0004] Although in existing drainage filtration devices, impurities accumulated and clogged on the filter screen are removed by negative pressure suction, a large amount of water is also removed in the process, and subsequent processing still requires a large amount of work. Summary of the Invention

[0005] Based on this, it is necessary to provide a drainage filter device with a self-cleaning function to address the problem that impurities accumulate in the current drainage filter device and affect the filtration efficiency and water discharge efficiency.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A drainage filter device with a self-cleaning function comprises a shell, a filtering mechanism and an extraction mechanism. The shell is fixedly arranged, and the filtering mechanism comprises a first filter cartridge, a second filter cartridge, a ring plate, a third filter cartridge and a positioning assembly. The first filter cartridge is horizontally arranged in the shell, and a fixing ring is provided on the circumferential surface of both ends of the first filter cartridge. The two fixing rings are fixedly connected to the shell, and the two fixing rings divide the interior of the shell plate into a first cavity, a second cavity and a third cavity. The first cavity, the second cavity and the third cavity are arranged in sequence along the axial direction of the first filter cartridge. The second cavity is connected to the first cavity and the third cavity respectively through the first filter cartridge. The second filter cartridge is sleeved in the first filter cartridge, and one end of the second filter cartridge is along the axial direction of the first filter cartridge. The filter element is slidingly arranged in the first filter cartridge, the ring plate is arranged in the first cavity, and the ring plate is fixedly installed on the end of the second filter cartridge away from the first filter cartridge, the third filter cartridge is fixedly installed on the ring plate, and the third filter cartridge is arranged in the second filter cartridge, and the first filter cartridge, the second filter cartridge, the third filter cartridge and the ring plate are coaxial; an inlet pipe and an outlet pipe are provided on the shell, the inlet pipe is connected to the first cavity, and the outlet pipe is connected to the second cavity; the positioning assembly is used to seal the ring plate and control the position of the ring plate in the first cavity, when the circumference of the second filter cartridge is blocked, the water in the first cavity will exert a force on the ring plate along the axis of the second filter cartridge to approach the second cavity; the extraction mechanism is arranged inside the shell, for extracting impurities in the third filter cartridge and the inner surface of the first filter cartridge;

[0008] The filtering mechanism has a first state and a second state. In the first state, the positioning assembly limits the position of the ring plate in the first cavity, and the second filter cartridge filters the water in the first cavity normally; in the second state, the second filter cartridge is blocked, and the ring plate drives the second filter cartridge in the first cavity along the axis extension direction of the second filter cartridge to approach the second cavity, and the impurities in the first cavity flow into the third filter cartridge under the action of water flow.

[0009] Preferably, the extraction mechanism includes a trigger assembly, an airbag and a force storage assembly, the airbag is arranged in the third cavity, the trigger assembly includes a fixed column, a limiting ring, a slider and a pushing portion, the fixed column is fixedly installed inside the shell, and the fixed column is located in the third cavity, the fixed column extends along the axial direction of the first filter cartridge, and the central axis of the fixed column coincides with the axis of the first filter cartridge, the limiting ring is sleeved on the fixed column, and the limiting ring is slidably arranged on the fixed column along the axial direction of the fixed column, the airbag is arranged on the side of the limiting ring away from the first filter cartridge, and one end of the airbag is fixedly connected to the limiting ring, and the other end of the airbag is fixedly connected to the limiting ring. The filter element is connected to the shell, and the airbag is extended and retracted along the moving direction of the limit ring. A groove is provided at one end of the fixing column close to the first filter cartridge, and the groove runs through the circumference of the fixing column. The slider is set in the groove for sliding along the radial direction of the first filter cartridge, and the side of the slider close to the first filter cartridge can be clamped with the side of the limit ring away from the first filter cartridge. The pushing part is set on the fixing column for sliding along the axial direction of the first filter cartridge. The pushing part is located between the third filter cartridge and the slider, and is used to disengage the slider from the limit ring after the third filter cartridge abuts against it. The force storage component is used to provide energy for rapid contraction of the airbag when the ring plate moves toward the second cavity.

[0010] Preferably, the pushing part includes a pushing block, a first connecting rod and a retaining ring, the pushing block is slidably arranged in the groove along the axial direction of the fixed column, the pushing block is located on the side of the slider close to the first filter cartridge, and the pushing block can abut against the slider, and the side of the push block abutting the slider is provided with an inclined surface, and the inclined surfaces on the push block and the slider gradually move away from the first filter cartridge from the side close to the axis of the fixed column to the side away from the axis of the fixed column, one end of the first connecting rod is connected to the push block, and the first connecting rod is located on the side of the push block close to the first filter cartridge, the retaining ring is connected to the end of the first connecting rod away from the push block, the retaining ring is coaxial with the third filter cartridge, and the retaining ring can abut against the end of the third filter cartridge away from the ring plate.

[0011] Preferably, the force storage assembly includes a hydraulic damping rod and a telescopic rod, one end of the hydraulic damping rod is fixedly mounted on the third filter cartridge, the hydraulic damping rod extends along the axial direction of the third filter cartridge, the telescopic rod includes a fixed part and a movable part, one end of the fixed part is fixedly mounted on the end of the hydraulic damping rod away from the third filter cartridge, the fixed part extends along the axial direction of the third filter cartridge, the movable part is sleeved on the fixed part, the movable part can abut against the limiting ring, a second spring is fixedly mounted on the end of the fixed part away from the hydraulic damping rod, the other end of the second spring is connected to the movable part, and the second spring is telescopic along the axial direction of the third filter cartridge.

[0012] Preferably, the end of the third filter cartridge away from the ring plate is a conical mouth, and the diameter of the conical mouth of the third filter cartridge is smaller than the end of the third filter cartridge close to the ring plate, and a plurality of sealing blocks are slidingly provided on the inner surface of the conical mouth of the third filter cartridge, and the plurality of sealing blocks are evenly distributed around the axis of the third filter cartridge, and each sealing block slides along the extension direction of a busbar of the conical mouth of the third filter cartridge, and the plurality of sealing blocks can open or close the conical mouth end face of the third filter cartridge when sliding along the extension direction of the busbar of the corresponding conical mouth; a second connecting rod is fixedly installed on the end of the fixing column close to the third filter cartridge, and a top ring is fixedly installed on the end of the second connecting rod away from the fixing column, the top ring is coaxial with the third filter cartridge, and the outer diameter of the top ring is consistent with the inner diameter of the end of the third filter cartridge with the conical mouth, the top ring can abut against the sealing block, and the top ring is located between the retaining ring and the ring plate.

[0013] Preferably, the filter holes on the third filter cartridge are gradually denser from one end close to the ring plate to the other end.

[0014] Preferably, a surface of the ring plate away from the third filter cartridge is a conical surface, and the conical surface gradually approaches the third filter cartridge from the outer ring of the ring plate to the inner ring of the ring plate.

[0015] Preferably, the positioning assembly includes a positioning rod and a stop rod. The positioning rod is rotatably arranged on the shell, and the positioning rod is arranged on the side of the second filter cartridge away from the first filter cartridge. The rotation axis of the positioning rod coincides with the axis of the second filter cartridge. The diameter of the positioning rod is consistent with the diameter of the inner ring of the ring plate. The positioning rod is slidingly connected to the ring plate. The stop rod is fixedly installed on the circumferential surface of the positioning rod. A through groove is opened on the ring plate, and the through groove is connected to the inner circumferential surface of the ring plate. The stop rod is slidingly connected to the through groove.

[0016] Preferably, pressure sensors are provided in the water inlet pipe and the water outlet pipe, a first water pump is provided at the water inlet pipe, a second water pump is installed at the water outlet pipe, a control panel is provided outside the shell, and the pressure sensor, the first water pump, and the second water pump are all electrically connected to the control panel.

[0017] Preferably, a scraper ring is provided on the end surface of the second filter cartridge located inside the first filter cartridge, the outer circumference of the scraper ring is slidably connected to the inner surface of the first filter cartridge, and the inner diameter of the scraper ring is larger than the outer diameter of the third filter cartridge and smaller than the inner diameter of the second filter cartridge.

[0018] The beneficial effect of the present invention is that: through the coordinated arrangement of the second filter cartridge and the ring plate, when the water filtration amount of the circumference of the second filter cartridge decreases, it means that the impurities on the circumference of the second filter cartridge increase, and the water in the first cavity will pass through the ring plate and enter the third filter cartridge, then the horizontal thrust applied to the ring plate will increase, and a positioning component is provided. After being subjected to a certain thrust, the ring plate drives the second filter cartridge closer to the first filter cartridge, and one end of the second filter cartridge sliding in the first filter cartridge can scrape off impurities on the inner surface of the first filter cartridge. At the same time, the end of the first filter cartridge and the second filter cartridge slidingly connected scrapes off impurities on the outer surface of the second filter cartridge, and the impurities in the first cavity will flow into the third filter cartridge with the water flow, thereby reducing the blockage degree of the second filter cartridge and increasing the water filtration amount of the first filter cartridge and the second filter cartridge; an extraction mechanism is provided to extract impurities accumulated in the third filter cartridge and the first filter cartridge when they reach a certain amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a drainage filter device with a self-cleaning function provided by an embodiment of the present invention;

[0020] Figure 2 A top view of a drainage filter device with a self-cleaning function provided by an embodiment of the present invention;

[0021] Figure 3 for Figure 2 Cross-sectional view along the AA axis;

[0022] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0023] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0024] Figure 6 for Figure 3 Enlarged view of point D in the middle.

[0025] 1. The filter element of the embodiment of the present invention is as follows: 100, housing; 101, first filter cartridge; 102, second filter cartridge; 103, ring plate; 104, third filter cartridge; 105, fixing ring; 106, first cavity; 107, second cavity; 108, third cavity; 109, water inlet pipe; 110, water outlet pipe; 111, discharge pipe; 200, air bag; 201, fixing column; 202, limiting ring; 203, slider; 204, groove; 205, push block; 206, first connecting rod; 207, retaining ring; 208, first spring; 209, hydraulic damping rod; 210, telescopic rod; 211, tapered mouth; 212, sealing block; 213, second connecting rod; 214, top ring; 215, positioning rod; 216, retaining rod; 217, through groove; 218, pressure sensor; 219, scraper ring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention include direct and indirect connections (couplings) unless otherwise specified. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0028] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0029] like Figures 1 to 6As shown, an embodiment of the present invention provides a drainage filter device with a self-cleaning function, including a housing 100, a filtering mechanism and an extraction mechanism. The housing 100 is fixedly arranged, and the filtering mechanism includes a first filter cartridge 101, a second filter cartridge 102, a ring plate 103, a third filter cartridge 104 and a positioning assembly. The first filter cartridge 101 is horizontally arranged in the housing 100, and a fixing ring 105 is provided on the circumferential surface of both ends of the first filter cartridge 101. The two fixing rings 105 are fixedly connected to the housing 100, and The two fixing rings 105 divide the interior of the shell 100 into a first cavity 106, a second cavity 107 and a third cavity 108. The first cavity 106, the second cavity 107 and the third cavity 108 are arranged in sequence along the axial direction of the first filter cartridge 101. The second cavity 107 is connected to the first cavity 106 and the third cavity 108 respectively through the first filter cartridge 101. The second filter cartridge 102 is sleeved in the first filter cartridge 101, and one end of the second filter cartridge 102 is arranged along the axial direction of the first filter cartridge 101. The first filter cartridge 101 is slidingly arranged in the direction, the ring plate 103 is arranged in the first cavity 106, and the ring plate 103 is fixedly installed on the end of the second filter cartridge 102 away from the first filter cartridge 101, the third filter cartridge 104 is fixedly installed on the ring plate 103, and the third filter cartridge 104 is arranged in the second filter cartridge 102, the first filter cartridge 101, the second filter cartridge 102, the third filter cartridge 104 and the ring plate 103 are coaxial; the housing 100 is provided with an inlet pipe 109 and an outlet pipe 110, and the inlet pipe 1 09 is in communication with the first cavity 106, and the outlet pipe 110 is in communication with the second cavity 107; the positioning assembly is used to block the ring plate 103 and control the position of the ring plate 103 in the first cavity 106. When the peripheral surface of the second filter cartridge 102 is blocked, the water in the first cavity 106 will exert a force on the ring plate 103 along the axis of the second filter cartridge 102 to move closer to the second cavity 107; the extraction mechanism is provided inside the housing 100 and is used to extract impurities in the third filter cartridge 104 and the inner surface of the first filter cartridge 101;

[0030] The filtering mechanism has a first state and a second state. In the first state, the positioning assembly limits the position of the ring plate 103 in the first cavity 106, and the second filter cartridge 102 normally filters the water in the first cavity 106; in the second state, the second filter cartridge 102 is blocked, and the ring plate 103 drives the second filter cartridge 102 in the first cavity 106 along the axial extension direction of the second filter cartridge 102 to approach the second cavity 107, and the impurities in the first cavity 106 flow into the third filter cartridge 104 under the action of the water flow.

[0031] Through the coordination of the second filter cartridge 102 and the ring plate 103, when the amount of water filtered by the second filter cartridge 102 decreases, it means that the impurities on the second filter cartridge 102 increase, and the water in the first cavity 106 will pass through the ring plate 103 and enter the third filter cartridge 104. Then, the horizontal thrust on the ring plate 103 will increase. A positioning assembly is provided, and the ring plate 103 drives the second filter cartridge 102 to approach the first filter cartridge 101 after receiving a certain thrust, and the second filter cartridge 102 slides at one end inside the first filter cartridge 101. It is capable of scraping off impurities on the inner surface of the first filter cartridge 101, and at the same time, one end of the first filter cartridge 101 and the second filter cartridge 102 being slidably connected can scrape off impurities on the outer surface of the second filter cartridge 102, and the impurities in the first cavity 106 will flow into the third filter cartridge 104, thereby reducing the degree of blockage of the second filter cartridge 102 and increasing the water filtration capacity of the first filter cartridge 101 and the second filter cartridge 102; an extraction mechanism is provided to extract impurities accumulated in the third filter cartridge 104 and the first filter cartridge 101 when the amount reaches a certain level.

[0032] In this embodiment, the extraction mechanism includes a trigger assembly, an airbag 200 and a force storage assembly. The airbag 200 is arranged in the third cavity 108. The trigger assembly includes a fixed column 201, a limiting ring 202, a slider 203 and a pushing portion. The fixed column 201 is fixedly installed inside the shell 100, and the fixed column 201 is located in the third cavity 108. The fixed column 201 extends along the axial direction of the first filter cartridge 101, and the central axis of the fixed column 201 coincides with the axis of the first filter cartridge 101. The limiting ring 202 is sleeved on the fixed column 201, and the limiting ring 202 is on the fixed column 201 along the axial direction of the fixed column 201. The airbag 200 is arranged to slide in the direction of the limit ring 202 away from the first filter cartridge 101, and one end of the airbag 200 is fixedly connected to the limit ring 202, and the other end of the airbag 200 is connected to the housing 100. The airbag 200 is extended and retracted along the moving direction of the limit ring 202. There are multiple airbags 200, and the multiple airbags 200 are evenly distributed around the fixed column 201. A groove 204 is opened at one end of the fixed column 201 close to the first filter cartridge 101. The groove 204 runs through the circumference of the fixed column 201. The slider 203 is set in the groove 204 along the radial direction of the first filter cartridge 101, and the slider 203 is close to the first filter cartridge 101. The side close to the first filter cartridge 101 can be clamped with the side of the limiting ring 202 away from the first filter cartridge 101. The side of the limiting ring 202 close to the first filter cartridge 101 is provided with an inclined surface. When the limiting ring 202 is located between the first filter cartridge 101 and the slider 203, the limiting ring 202 is clamped with the slider 203. When the limiting ring 202 is located on the side of the slider 203 away from the first filter cartridge 101, and when the limiting ring 202 approaches the slider 203 and contacts the slider 203, the limiting ring 202 can push the slider 203 to move along the radial direction of the fixed column 201 through the inclined surface, and the limiting ring 202 can pass over the slider 203. The pushing portion is slidably arranged on the fixed column 201 along the axial direction of the first filter cartridge 101. The pushing portion is located between the third filter cartridge 104 and the slider 203, and is used to disengage the slider 203 from the limiting ring 202 after the third filter cartridge 104 abuts against it. The force storage component can abut against the limiting ring 202 to store energy. Before the pushing portion abuts against the third filter cartridge 104, the force storage component has abutted against the limiting ring 202 and started to store energy. When the pushing portion abuts against the third filter cartridge 104 and the slider 203 disengages from the limiting ring 202, the energy stored in the force storage component begins to be released and pushes the limiting ring 202 to compress the airbag 200.

[0033] An airbag 200 is provided, and the change in the volume of the airbag 200 can change the pressure in the third cavity 108, so that the third cavity 108 generates suction or thrust relative to the second cavity 107. Through the cooperation of the force storage component and the trigger component, when the third filter cartridge 104 continues to move toward the first filter cartridge 101, the force storage component abuts against the trigger component and starts to store energy. After the energy storage reaches a certain level, the trigger component can make the energy stored in the force storage component act on the airbag 200. After the airbag 200 shrinks, the volume in the third cavity 108 increases, and the third cavity 108 will suck impurities in the third filter cartridge 104 and the first filter cartridge 101, so that the impurities enter the third cavity 108, thereby allowing the first filter cartridge 101 and the second filter cartridge 102 to be used continuously.

[0034] In this embodiment, the pushing portion includes a pushing block 205, a first connecting rod 206 and a retaining ring 207. The pushing block 205 is slidably arranged in the groove 204 along the axial direction of the fixed column 201. The pushing block 205 is located on the side of the slider 203 close to the first filter cartridge 101, and the pushing block 205 can abut against the slider 203. The side of the pushing block 205 abutting against the slider 203 is provided with an inclined surface. The inclined surfaces on the pushing block 205 and the slider 203 gradually move away from the first filter cartridge 101 from the side close to the axis of the fixed column 201 to the side away from the axis of the fixed column 201. When the pushing block 205 approaches the slider 203, the pushing block 205 will push the slider 203 along the radial direction of the fixed column 201 to the axis of the fixed column 201 under the action of its own inclined surface and the inclined surface on the slider 203, and the slider 203 will gradually reduce The contact area with the limit ring 202 is adjusted until it is out of contact with the limit ring 202. A first spring 208 is provided in the groove 204, one end of the first spring 208 is connected to the slider 203, and the other end of the slider 203 is connected to the fixed column 201. The first spring 208 is extended and retracted along the sliding direction of the slider 203 in the groove 204, that is, after the push block 205 is away from the slider 203, the slider 203 will be reset under the action of the first spring 208, one end of the first connecting rod 206 is connected to the push block 205, and the first connecting rod 206 is located on the side of the push block 205 close to the first filter cartridge 101, and the retaining ring 207 is connected to the end of the first connecting rod 206 away from the push block 205. The retaining ring 207 is coaxial with the third filter cartridge 104, and the retaining ring 207 can abut against the end of the third filter cartridge 104 away from the ring plate 103.

[0035] In this embodiment, the force storage assembly includes a hydraulic damping rod 209 and a telescopic rod 210. One end of the hydraulic damping rod 209 is fixedly mounted on the third filter cartridge 104, and the hydraulic damping rod 209 extends in the axial direction of the third filter cartridge 104. The telescopic rod 210 includes a fixed portion and a movable portion. One end of the fixed portion is fixedly mounted on the end of the hydraulic damping rod 209 away from the third filter cartridge 104, and the fixed portion extends in the axial direction of the third filter cartridge 104. The movable portion is sleeved on the fixed portion and can abut against the limit ring 202. A second spring is fixedly mounted on the end of the fixed portion away from the hydraulic damping rod 209, and the other end of the second spring is connected to the movable portion. The second spring is telescopic in the axial direction of the third filter cartridge 104. The force storage assembly is provided with multiple force storage assemblies, and the multiple force storage assemblies are arranged around the third filter cartridge 104. The cylinders 104 are evenly distributed, a first synchronization ring is provided between the multiple hydraulic damping rods 209, the first synchronization ring is fixedly connected to the multiple hydraulic damping rods 209, and the multiple hydraulic damping rods 209 can be extended and retracted at the same time, a second synchronization ring is provided between the multiple telescopic rods 210, the second synchronization ring is fixedly connected to the multiple telescopic rods 210, and the multiple telescopic rods 210 can be extended and retracted at the same time, and the multiple force storage components exert the same force on each position of the limit ring 202, so that the limit ring 202 slides more smoothly on the fixed column 201.

[0036] A third spring is provided inside the hydraulic damping rod 209 , and the third spring can reset the hydraulic damping rod 209 .

[0037] In this embodiment, the end of the third filter cartridge 104 away from the ring plate 103 is a tapered opening 211, and the diameter of the tapered opening 211 of the third filter cartridge 104 is smaller than the end of the third filter cartridge 104 close to the ring plate 103. A plurality of sealing blocks 212 are slidingly provided on the inner surface of the tapered opening 211 of the third filter cartridge 104. The plurality of sealing blocks 212 are evenly distributed around the axis of the third filter cartridge 104. Each sealing block 212 slides along a generatrix extension direction of the tapered opening 211 of the third filter cartridge 104. The inner surface of the tapered opening 211 is provided with a plurality of guide plates, each sealing block 212 is slidably connected to a guide plate, and the plurality of sealing blocks 212 can open or close the end surface of the tapered opening 211 of the third filter cartridge 104 when sliding along the extension direction of the generatrix of the corresponding tapered opening 211; the fixing post 201 is fixed at one end close to the third filter cartridge 104 A second connecting rod 213 is fixedly installed, and a top ring 214 is fixedly installed on one end of the second connecting rod 213 away from the fixed column 201. The top ring 214 is coaxial with the third filter cartridge 104, and the outer diameter of the top ring 214 is consistent with the inner diameter of the end of the third filter cartridge 104 with a tapered mouth 211. The top ring 214 can abut against the sealing block 212. The top ring 214 is located between the retaining ring 207 and the ring plate 103. When the top ring 214 does not contact the sealing block 212, the third filter cartridge 104 will not contact the retaining ring 207. At the same time, the sealing block 212 can block the end face of the tapered mouth 211 of the third filter cartridge 104 under the push of the water flow in the third filter cartridge 104, thereby reducing the interception area of ​​water flowing from the first cavity 106 to the second cavity 107, and increasing the power of the third filter cartridge 104 and the second filter cartridge 102 to approach the first filter cartridge 101.

[0038] Each sealing block 212 is provided with a through hole for discharging water to the outside of the second filter cartridge 102 .

[0039] In this embodiment, the distribution of the filter holes on the third filter cartridge 104 gradually becomes denser from one end close to the ring plate 103 to the other end. When impurities enter the third filter cartridge 104 with the water flow, most of the water in the third filter cartridge 104 will drive the impurities therein to move toward the position where the third filter cartridge 104 is provided with a tapered mouth 211. After suction is generated in the third cavity 108, the impurities in the third filter cartridge 104 can more easily enter the third cavity 108 through the tapered mouth 211.

[0040] In this embodiment, the side of the ring plate 103 away from the third filter cartridge 104 is a conical surface, and the conical surface gradually approaches the third filter cartridge 104 from the outer ring of the ring plate 103 to the inner ring of the ring plate 103. When the second filter cartridge 102 approaches the first filter cartridge 101 along its axial direction, the portion of the second filter cartridge 102 located in the first cavity 106 gradually decreases, and the water in the first cavity 106 will pass through the ring plate 103 into the third filter cartridge 104. The water flow will drive the impurities in the first cavity 106 into the third filter cartridge 104. The impurities passing through the ring plate 103 are more easily entered into the third filter cartridge 104 under the guidance of the conical surface.

[0041] In this embodiment, the positioning assembly includes a positioning rod 215 and a blocking rod 216. The positioning rod 215 is rotatably arranged on the housing 100, and the positioning rod 215 is arranged on the side of the second filter cartridge 102 away from the first filter cartridge 101. The rotation axis of the positioning rod 215 coincides with the axis of the second filter cartridge 102. The diameter of the positioning rod 215 is consistent with the diameter of the inner ring of the ring plate 103. The positioning rod 215 is slidably connected to the ring plate 103. The blocking rod 216 is fixedly installed on the circumference of the positioning rod 215. A through groove 217 is provided on the ring plate 103. The through groove 217 is communicated with the inner circumference of the ring plate 103. The blocking rod 216 is slidably connected to the through groove 217. The positioning rod 215 is positioned A motor is connected to one end outside the shell 100, and the motor is fixedly installed on the shell 100. The motor is used to drive the positioning rod 215 to rotate. When the drainage filter device with self-cleaning function drains normally, one end of the positioning rod 215 equipped with a baffle 216 extends into the third filter cartridge 104, and the baffle 216 abuts against the ring plate 103. The baffle 216 can apply resistance in the opposite direction to the ring plate 103, so that the second filter cartridge 102 cannot approach the first filter cartridge 101 under the impact of the water flow. Only by rotating the positioning rod 215 to make the baffle 216 slide into the through groove 217, the second filter cartridge 102 will approach the first filter cartridge 101 under the impact of the water flow.

[0042] In this embodiment, pressure sensors 218 are provided in the water inlet pipe 109 and the water outlet pipe 110, a first water pump is provided at the water inlet pipe 109, and a second water pump is installed at the water outlet pipe 110. A control panel is provided on the outside of the housing 100, and the pressure sensor 218, the first water pump, and the second water pump are all electrically connected to the control panel, and the motor is also electrically connected to the control panel. When the drainage filter device with a self-cleaning function is draining normally, the first water pump starts and the second water pump stops. The first water pump can draw water in the mine into the first cavity 106 and discharge it from the water outlet pipe 110 through the second cavity 107. When the pressure difference monitored by the two pressure sensors 218 in the water inlet pipe 109 and the water outlet pipe 110 reaches a preset value, it indicates that the first filter cartridge 101 or the second filter cartridge 102 is blocked. At this time, the control panel controls the motor to rotate, and the motor passes The positioning rod 215 drives the baffle rod 216 to slide on the ring plate 103, and the motor stops after rotating a certain angle. At this time, the baffle rod 216 moves to the position of the through groove 217, and the baffle rod 216 no longer restricts the ring plate 103. The second filter cartridge 102 and the ring plate 103 approach the first filter cartridge 101 under the impact of the water flow, and the baffle rod 216 slides in the through groove 217 and breaks contact with the ring plate 103. Then the extraction mechanism cleans the impurities in the second filter cartridge 102 and the first filter cartridge 101 into the third cavity 108. After the pressure difference monitored by the two pressure sensors 218 in the water inlet pipe 109 and the water outlet pipe 110 is restored, the control panel controls the first water pump to stop and the second water pump to start supplying water to the second cavity 107. During the backwashing process of the first filter cartridge 101 and the third filter cartridge 104, the water flow is used to drive the second filter cartridge 102 to reset.

[0043] In another embodiment, the motor is started once at a certain interval. After the motor is started, the second water pump is started at a certain interval, and the first water pump is stopped at the same time. The degree of blockage of the second filter cartridge 102 is different each time, and the speed at which the water flow in the first cavity 106 drives the second filter cartridge 102 to approach the first filter cartridge 101 is different. The more serious the blockage of the second filter cartridge 102 is, the faster the second filter cartridge 102 moves, and the time from the contact between the telescopic rod 210 and the limit ring 202 to the trigger assembly triggering the compression airbag 200 is shorter. The movement of the hydraulic damping rod 209 is relatively reduced, and the compression amount of the telescopic rod 210 reaches the maximum value when the airbag 200 can be compressed. The airbag 200 can shrink to the maximum value, and the volume change of the third cavity 108 can be adjusted accordingly. While ensuring that the third cavity 108 can fully absorb impurities, the amount of water absorbed can also be controlled according to the amount of impurities, to avoid excessive water flow from impacting the impurities deposited in the third cavity 108 and causing them to escape.

[0044] In this embodiment, a discharge pipe 111 is provided on the shell 100, and the discharge pipe 111 is connected to the third cavity 108. The end of the discharge pipe 111 away from the third cavity 108 is connected to a storage bin for storing impurities in the third cavity 108. A valve is provided on the discharge pipe 111, and the valve is electrically connected to the control panel. When the impurities in the third cavity 108 accumulate to a certain amount and are deposited, the valve opens, and the impurities in the third cavity 108 flow into the storage bin under the action of water flow. The impurities are collected together and then flushed away with water flow, which can reduce the water collected in the storage bin and enable the storage bin to fully collect more impurities.

[0045] In this embodiment, a scraper ring 219 is provided on the end face of the second filter cartridge 102 located inside the first filter cartridge 101, and the outer peripheral surface of the scraper ring 219 is slidably connected to the inner surface of the first filter cartridge 101, and the inner diameter of the scraper ring 219 is larger than the outer diameter of the third filter cartridge 104 and smaller than the inner diameter of the second filter cartridge 102. When the second filter cartridge 102 approaches the third cavity 108 in the first filter cartridge 101, the scraper ring 219 is used to scrape off impurities on the inner surface of the first filter cartridge 101, and under the action of the scraper ring 219, the scraped impurities will be pushed to the position of the first filter cartridge 101 close to the third cavity 108, and will not fall on the second filter cartridge 102.

[0046] The working principle and working method of the drainage filter device with self-cleaning function provided in this embodiment are as follows:

[0047] First, connect the water inlet pipe 109 to the water source in the coal mine, then connect the water outlet pipe 110 to the drainage pipe, and start the first water pump. The first water pump draws the accumulated water in the coal mine into the first cavity 106 through the water inlet pipe 109. The water entering the first cavity 106 is filtered by the second filter cartridge 102, and larger impurities will remain in the first cavity 106. The filtered water enters the second filter cartridge 102, and then enters the first filter cartridge 101 and the third cavity 108 until the interior of the shell 100 is filled. The water inside the first filter cartridge 101 is filtered by the first filter cartridge 101 and flows to the water outlet pipe 110. The small impurities filtered out by the first filter cartridge 101 are concentrated on the inner surface of the first filter cartridge 101.

[0048] After the water flows into the first cavity 106, the water flow will generate a thrust on the second filter cartridge 102 to move toward the third cavity 108, and at the same time, the sealing block 212 in the third filter cartridge 104 will also be subjected to a thrust in the same direction. After being thrust, multiple sealing blocks 212 move on the surface of the third filter cartridge 104 toward the end face of the tapered mouth 211 of the third filter cartridge 104, and multiple sealing blocks 212 block one end of the tapered mouth 211 of the third filter cartridge 104; when the pressure sensor 218 in the water inlet pipe 109 and the water outlet pipe 110 detects that the pressure difference between the water inlet pipe 109 and the water outlet pipe 110 reaches a preset value, the motor starts, and the motor drives the positioning rod 215 to rotate a certain angle, and the positioning rod 215 drives the blocking rod 216 to rotate the same Angle, at this time, the blocking rod 216 moves to the position of the through groove 217 on the ring plate 103, and the blocking rod 216 no longer abuts against the ring plate 103. The second filter cartridge 102, the ring plate 103 and the third filter cartridge 104 approach the third cavity 108 under the action of the water flow, and the blocking rod 216 slides in the through groove 217 and gradually breaks away from contact with the ring plate 103. During the movement of the second filter cartridge 102, the part located in the first cavity 106 gradually decreases, and the first filter cartridge 101 scrapes off the impurities on the outer peripheral surface of the second filter cartridge 102, and all the impurities remain in the first cavity 106. The second filter cartridge 102 drives the scraping ring 219 to scrape off the impurities on the inner peripheral surface of the first filter cartridge 101, and the accumulated impurities move to the third cavity 108.

[0049] During the movement of the second filter cartridge 102, the flow of water passing through the ring plate 103 increases, and the water flow in the first cavity 106 drives the large impurities inside it to pass through the ring plate 103 and enter the third filter cartridge 104, and the impurities are close to the position of the sealing block 212 in the third filter cartridge 104. The water filtered by the third filter cartridge 104 enters the second filter cartridge 102, and then enters the first filter cartridge 101 through the second filter cartridge 102, and is finally discharged from the water outlet pipe 110; at the same time, the third filter cartridge 104 drives the hydraulic damping rod 209 to move toward the third cavity 108, and the hydraulic damping rod 209 is driven by the hydraulic damping rod 209. 09 drives the telescopic rod 210 to move toward the third cavity 108, and then the moving part of the telescopic rod 210 first abuts against the limit ring 202, and then the moving part of the telescopic rod 210 moves relative to the fixed part and compresses the second spring, and the telescopic rod 210 contracts and stores energy. At this time, the hydraulic damping rod 209 receives the reverse thrust from the telescopic rod 210 and begins to contract slowly. The third filter cartridge 104 continues to move, and then the top ring 214 contacts the sealing block 212, and then the top ring 214 pushes the sealing block 212 to slide in the third filter cartridge 104. Multiple sealing blocks 212 move away from each other, and the third filter cartridge 104 is provided with One end of the tapered mouth 211 is opened, and at this time the third filter cartridge 104 and the scraper ring 219 are both relatively close to the third cavity 108. Then the third filter cartridge 104 continues to move and abuts against the retaining ring 207. The retaining ring 207 pushes the push block 205 to slide in the groove 204 through the first connecting rod 206. The push block 205 approaches the slider 203. The push block 205 pushes the slider 203 to slide away from the limiting ring 202 under the action of its own inclined surface and the inclined surface on the slider 203. The slider 203 compresses the first spring 208, and then the slider 203 is disengaged from the limiting ring 202, and the limiting ring 202 is released. The ring 202 begins to release energy. Under the action of the telescopic rod 210, the limit ring 202 slides along the axial direction of the fixed column 201 and squeezes the airbag 200. The gas in the airbag 200 is compressed, the volume of the airbag 200 decreases, the volume of the third cavity 108 increases, and the pressure decreases. The third cavity 108 extracts water from the second cavity 107. When the water in the second cavity 107 is replenished into the third cavity 108, it pushes the impurities accumulated near the third cavity 108 in the first filter cartridge 101 and the third filter cartridge 104 into the third cavity 108, and the third cavity 108 completes the collection of impurities.

[0050] After the collection is completed, the first water pump is turned off and the second water pump is started. The second water pump extracts the water in the water pipe 110 and transports it to the second cavity 107. The pressure in the second cavity 107 increases, and the water flows through the ring plate 103 to drive the second filter cartridge 102 and the third filter cartridge 104 to move into the first cavity 106. The third filter cartridge 104 drives the telescopic rod 210 to move through the hydraulic damping rod 209. The pressure between the push block 205 and the slider 203 gradually decreases, and the first spring 208 pushes the slider 203 in the opposite direction. After the movement and reset, the slider 203 pushes the push block 205 to move. At the same time, the airbag 200 begins to slowly recover after being freed from pressure. The airbag 200 pushes the limiting ring 202 toward the slider 203 on the fixed column 201. When the limiting ring 202 contacts the slider 203, the limiting ring 202 is guided by its own inclined surface to pass over the slider 203 and compress the first spring 208. After the limiting ring 202 passes over the slider 203, the slider 203 is again engaged with the limiting ring 202 under the action of the first spring 208. The ring plate 103 gradually approaches the positioning rod 215 under the push of the water flow. Finally, the blocking rod 216 slides in the through groove 217 and re-enters the interior of the third filter cartridge 104. At this time, the motor rotates in the opposite direction by a certain angle, causing the blocking rod 216 to move away from the through groove 217. The second water pump then stops and the first water pump starts, and begins to pump the accumulated water in the coal mine again.

[0051] After a certain amount of impurities are deposited in the third cavity 108, the impurities are located at the bottom of the third cavity 108. The valve in the discharge pipe 111 is opened, and the impurities in the third cavity 108 enter the storage bin through the impact of the water flow above it. Only a small amount of water enters the storage bin, and then the valve is closed, reducing the workload of subsequent processing of these impurities.

[0052] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A drainage filter device with self-cleaning function, characterized in that: include: The housing, the filtering mechanism and the extraction mechanism are fixedly arranged. The filtering mechanism includes a first filter cartridge, a second filter cartridge, a ring plate, a third filter cartridge and a positioning assembly. The first filter cartridge is horizontally arranged in the housing, and a fixing ring is provided on the circumferential surface of both ends of the first filter cartridge. The two fixing rings are fixedly connected to the housing, and the two fixing rings divide the interior of the housing plate into a first cavity, a second cavity and a third cavity. The first cavity, the second cavity and the third cavity are arranged in sequence along the axial direction of the first filter cartridge. The second cavity is connected to the first cavity and the third cavity respectively through the first filter cartridge. The second filter cartridge is sleeved in the first filter cartridge, and one end of the second filter cartridge is slidably arranged on the first filter cartridge along the axial direction of the first filter cartridge. In the filter, the ring plate is arranged in the first cavity, and the ring plate is fixedly mounted on the end of the second filter cartridge away from the first filter cartridge, the third filter cartridge is fixedly mounted on the ring plate, and the third filter cartridge is arranged in the second filter cartridge, and the first filter cartridge, the second filter cartridge, the third filter cartridge and the ring plate are coaxial; an inlet pipe and an outlet pipe are provided on the shell, the inlet pipe is connected with the first cavity, and the outlet pipe is connected with the second cavity; the positioning assembly is used to seal the ring plate and control the position of the ring plate in the first cavity, when the peripheral surface of the second filter cartridge is blocked, the water in the first cavity will exert a force on the ring plate along the axis of the second filter cartridge to approach the second cavity; the extraction mechanism is arranged inside the shell, for extracting impurities in the third filter cartridge and the inner surface of the first filter cartridge; The filter mechanism has a first state and a second state. In the first state, the positioning assembly limits the position of the ring plate in the first cavity, and the second filter cartridge normally filters the water in the first cavity. In the second state, the second filter cartridge is blocked, and the ring plate drives the second filter cartridge in the first cavity along the axis of the second filter cartridge toward the second cavity, and impurities in the first cavity flow into the third filter cartridge under the action of the water flow. The extraction mechanism includes a trigger assembly, an airbag and a force storage assembly. The airbag is arranged in the third cavity. The trigger assembly includes a fixed column, a limiting ring, a slider and a pushing portion. The fixed column is fixedly installed inside the shell, and the fixed column is located in the third cavity. The fixed column extends along the axial direction of the first filter cartridge, and the central axis of the fixed column coincides with the axis of the first filter cartridge. The limiting ring is sleeved on the fixed column, and the limiting ring is slidably arranged on the fixed column along the axial direction of the fixed column. The airbag is arranged on the side of the limiting ring away from the first filter cartridge, and one end of the airbag is fixedly connected to the limiting ring, and the other end of the airbag is connected to the shell. The filter element is connected to the filter element, the airbag is extended and retracted along the moving direction of the limiting ring, a groove is provided on one end of the fixing post close to the first filter cartridge, the groove runs through the circumference of the fixing post, the slider is slidably arranged in the groove along the radial direction of the first filter cartridge, and the side of the slider close to the first filter cartridge can be engaged with the side of the limiting ring away from the first filter cartridge, the pushing portion is slidably arranged on the fixing post along the axial direction of the first filter cartridge, the pushing portion is located between the third filter cartridge and the slider, and is used to disengage the slider from the limiting ring after the third filter cartridge abuts against it, and the force storage component is used to provide energy for rapid contraction of the airbag when the ring plate moves toward the second cavity; The pushing portion includes a pushing block, a first connecting rod and a retaining ring. The pushing block is slidably arranged in the groove along the axial direction of the fixed column. The pushing block is located on the side of the slider close to the first filter cartridge, and the pushing block can abut against the slider. The push block and the slider abutting side are both provided with an inclined surface. The inclined surfaces on the push block and the slider gradually move away from the first filter cartridge from the side close to the axis of the fixed column to the side away from the axis of the fixed column. One end of the first connecting rod is connected to the pushing block, and the first connecting rod is located on the side of the push block close to the first filter cartridge. The retaining ring is connected to the end of the first connecting rod away from the pushing block. The retaining ring is coaxial with the third filter cartridge, and the retaining ring can abut against the end of the third filter cartridge away from the ring plate. The force storage assembly includes a hydraulic damping rod and a telescopic rod, one end of the hydraulic damping rod is fixedly mounted on the third filter cartridge, the hydraulic damping rod extends along the axial direction of the third filter cartridge, the telescopic rod includes a fixed portion and a movable portion, one end of the fixed portion is fixedly mounted on an end of the hydraulic damping rod away from the third filter cartridge, the fixed portion extends along the axial direction of the third filter cartridge, the movable portion is sleeved on the fixed portion, the movable portion can abut against the limit ring, a second spring is fixedly mounted on an end of the fixed portion away from the hydraulic damping rod, the other end of the second spring is connected to the movable portion, and the second spring is telescopic along the axial direction of the third filter cartridge; The positioning assembly includes a positioning rod and a stop rod. The positioning rod is rotatably arranged on the shell, and the positioning rod is arranged on the side of the second filter cartridge away from the first filter cartridge. The rotation axis of the positioning rod coincides with the axis of the second filter cartridge. The diameter of the positioning rod is consistent with the diameter of the inner ring of the ring plate. The positioning rod is slidingly connected to the ring plate. The stop rod is fixedly installed on the circumferential surface of the positioning rod. A through groove is opened on the ring plate, and the through groove is connected to the inner circumferential surface of the ring plate. The stop rod is slidingly connected to the through groove.

2. A drainage filter device with self-cleaning function according to claim 1, characterized in that: The end of the third filter cartridge away from the ring plate is a tapered opening, and the diameter of the tapered opening of the third filter cartridge is smaller than the end of the third filter cartridge close to the ring plate. A plurality of sealing blocks are slidingly provided on the inner surface of the tapered opening of the third filter cartridge, and the plurality of sealing blocks are evenly distributed around the axis of the third filter cartridge. Each sealing block slides along the extension direction of a busbar of the tapered opening of the third filter cartridge, and the plurality of sealing blocks can open or close the end face of the tapered opening of the third filter cartridge when sliding along the extension direction of the busbar of the corresponding tapered opening; a second connecting rod is fixedly installed on the end of the fixing column close to the third filter cartridge, and a top ring is fixedly installed on the end of the second connecting rod away from the fixing column. The top ring is coaxial with the third filter cartridge, and the outer diameter of the top ring is consistent with the inner diameter of the end of the third filter cartridge with the tapered opening. The top ring can abut against the sealing block, and the top ring is located between the retaining ring and the ring plate.

3. The drainage filter device with self-cleaning function according to claim 1, characterized in that: The filter holes on the third filter cartridge are gradually denser from one end close to the ring plate to the other end.

4. The drainage filter device with self-cleaning function according to claim 1, characterized in that: A surface of the ring plate away from the third filter cartridge is a conical surface, and the conical surface gradually approaches the third filter cartridge from the outer circle of the ring plate to the inner circle of the ring plate.

5. The drainage filter device with self-cleaning function according to claim 1, characterized in that: Pressure sensors are provided in the water inlet pipe and the water outlet pipe, a first water pump is provided at the water inlet pipe, a second water pump is installed at the water outlet pipe, a control panel is provided outside the shell, and the pressure sensor, the first water pump and the second water pump are all electrically connected to the control panel.

6. The drainage filter device with self-cleaning function according to claim 1, characterized in that: The second filter cartridge is provided with a scraper ring on its end surface located inside the first filter cartridge. The outer circumference of the scraper ring is slidably connected to the inner surface of the first filter cartridge, and the inner diameter of the scraper ring is larger than the outer diameter of the third filter cartridge and smaller than the inner diameter of the second filter cartridge.

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