Pre-pumping filtering device and water supply system

Abstract

The utility model relates to the field of filtering, and discloses a pre-pumping filtering device and a water supply system. The pre-pumping filtering device comprises a support; the water outlet pipe is connected with the support and provided with a water inlet and a water outlet; the rotating shaft is rotationally connected with the support and the water outlet pipe; the impeller is arranged on the rotating shaft and located between the water inlet and the water outlet; the filter screen forms a cylindrical structure, the first end cover and the second end cover are arranged at the two ends of the filter screen respectively, the first end cover is arranged on the outer side of the water outlet pipe in a sleeving mode, the second end cover is connected with the rotating shaft, the supporting frame is arranged in the filter screen and connected with the filter screen and the rotating shaft, and the water inlet is located in the filter screen. The rotating shaft supports the filter screen through the supporting frame and the second end cover at the same time, the first end cover of the filter screen is not supported on the water outlet pipe, a non-standard bearing or a plurality of small bearings do not need to be arranged between the first end cover of the filter screen and the water outlet pipe, the bearing between the first end cover and the water outlet pipe is omitted, and therefore the cost of the pre-pumping filter device can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, in particular to a pre-pump microfiltration device and a water supply system. Background Art

[0002] The pre-pump filtration device is a filtration device placed in water, used to filter water before it enters the water pump.

[0003] In the related art, the pre-pump filtration device includes a support, a rotating shaft, blades, a water outlet pipe and a filter cartridge. The water outlet pipe is installed on the support. The rotating shaft is rotationally matched with the water outlet pipe, and the filter cartridge is rotatably sleeved on one end of the water outlet pipe through a bearing, and the filter cartridge is also connected to the rotating shaft. The part of the water outlet pipe located inside the filter cartridge is provided with a water inlet, and the part located outside the filter cartridge is provided with a water outlet. The blades are installed on the rotating shaft and located between the water outlet and the water inlet. During the filtration process, water enters the filter cartridge and is discharged through the water outlet pipe. During the process of flowing through the surface of the blades, the blades are driven to rotate. The blades drive the rotating shaft, and the rotating shaft drives the filter cartridge to rotate to prevent impurities from accumulating on the surface of the filter cartridge.

[0004] Since the diameter of the water outlet pipe is usually large, the size of the bearing between the filter cartridge and the water outlet pipe is also large. Therefore, non-standard bearings often need to be used, resulting in a high cost of the pre-pump filtration device. Or, a bearing bracket is sleeved on the water outlet pipe, and a plurality of bearings are arranged on the bearing bracket. The plurality of bearings are distributed along the circumferential direction of the water outlet pipe. In this way, the number of bearings increases, which also leads to a high cost of the pre-pump filtration device. Content of the Utility Model

[0005] In view of this, the utility model provides a pre-pump filtration device and a water supply system to solve the problem that in the pre-pump filtration device in the related art, the filter cartridge needs to be supported by a bearing provided outside the water outlet pipe, resulting in a high cost.

[0006] In the first aspect, the utility model provides a pre-pump filtration device, including:

[0007] A support;

[0008] A water outlet pipe, connected to the support, the water outlet pipe is provided with a water inlet and a water outlet;

[0009] A rotating shaft, rotationally connected to the support and the water outlet pipe respectively;

[0010] An impeller, arranged on the rotating shaft and located between the water inlet and the water outlet;

[0011] A filter screen, a first end cover, a second end cover and a support frame. The filter screen forms a cylindrical structure. The first end cover and the second end cover are respectively arranged at both ends of the filter screen. The first end cover is sleeved outside the water outlet pipe. The second end cover is connected to the rotating shaft. The support frame is arranged inside the filter screen and connects the filter screen and the rotating shaft. The water inlet is located inside the filter screen.

[0012] Advantageous effects: In the pre-pump filtering device provided in this embodiment, the filter screen is arranged on the rotating shaft through the support frame and the second end cover, that is, the rotating shaft supports the filter screen through the support frame and the second end cover at the same time, which can ensure the support effect on the filter screen. The first end cover of the filter screen does not support on the water outlet pipe. Therefore, there is no need to set non-standard bearings or multiple small bearings between the first end cover of the filter screen and the water outlet pipe. Compared with the pre-pump filtering device in the related art, the bearings between the first end cover and the water outlet pipe are saved, thereby reducing the cost of the pre-pump filtering device.

[0013] In addition, since the bearings between the first end cover and the water outlet pipe are saved, the loss of the rotating power of the filter screen caused by the bearings between the first end cover and the water outlet pipe is reduced, making the rotation resistance of the filter screen smaller and the rotation smoother.

[0014] In an optional embodiment, the pre-pump filtering device further includes a first connection disk connected to the rotating shaft. The support frame includes a plurality of support rods. The plurality of support rods are sequentially arranged along the circumferential direction of the rotating shaft. Both ends of the support rod are respectively connected to the first connection disk and the filter screen.

[0015] Advantageous effects: By setting the first connection disk on the rotating shaft, the installation area on the rotating shaft can be increased, so that the support rod can be connected to the rotating shaft through the first connection disk. The support frame includes a plurality of support rods distributed along the circumferential direction of the rotating shaft. On the one hand, an avoidance space for water flow to pass through is formed between adjacent support rods. On the other hand, the weight of the support frame can be reduced, thereby making the rotation of the filter screen smoother.

[0016] In an optional embodiment, the pre-pump filtering device further includes a connecting rod. The connecting rod is connected between the first end cover and the second end cover, and the connecting rod abuts against the inner wall of the filter screen. Each support rod is connected to the corresponding connecting rod.

[0017] Advantageous effects: By setting the connecting rod between the first end cover and the second end cover, and the connecting rod supports the inner wall of the filter screen, the overall rigidity of the filter screen can be improved, avoiding the problem that the filter screen collapses inward due to the water pressure. By connecting the support rod to the corresponding connecting rod, the support rod can support the connecting rod, improve the rigidity of the connecting rod, reduce the problem of bending deformation of the connecting rod, and ensure the support effect of the connecting rod on the filter screen.

[0018] In an alternative embodiment, a bent portion is provided at one end of the support rod away from the rotating shaft, the extending direction of the bent portion is consistent with the axial direction of the rotating shaft, and the bent portion is connected to the filter screen.

[0019] Advantageous effects: By providing a bent portion at one end of the support rod away from the rotating shaft, the bent portion extends along the axial direction of the rotating shaft, and the bent portion is connected to the filter screen or the connecting rod. The contact area between the bent portion and the filter screen or the connecting rod is relatively large. On the one hand, it can improve the supporting effect on the connecting rod or the filter screen, and on the other hand, it is convenient for the bent portion to be connected to the filter screen or the connecting rod. For example, the bent portion can be connected to the connecting rod or the filter screen through a threaded fastener, so as to facilitate the disassembly of the bent portion from the connecting rod or the filter screen.

[0020] In an alternative embodiment, the pre-pump filtering device further includes a rotary seal structure, which is arranged between the first end cover and the water outlet pipe and is used to seal the gap between the first end cover and the water outlet pipe.

[0021] Advantageous effects: By providing a rotary seal structure between the first end cover and the water outlet pipe, the gap between the first end cover and the water outlet pipe can be sealed, avoiding the problem that water directly enters the interior of the filter screen from the gap between the first end cover and the water outlet pipe without passing through the filter screen.

[0022] In an alternative embodiment, the pre-pump filtering device further includes a floating cylinder, the floating cylinder is connected to the support, and the floating cylinder is used to make the pre-pump filtering device float on the water surface. Wherein, in the floating state of the pre-pump filtering device, the water outlet pipe is located below the water surface, and a part of the filter screen is located above the water surface and another part is located below the water surface.

[0023] Advantageous effects: By providing a floating cylinder, the pre-pump filtering device can float on the water surface, which can reduce the influence of sand or fish larvae. By making the water outlet pipe located below the water surface, the problem of the water outlet pipe sucking air can be reduced, avoiding damage to the water pump due to air suction. By making a part of the filter screen located above the water surface and another part located below the water surface, it can not only allow water to enter the filter screen, but also reduce the resistance of the water body to the filter screen, making the filter screen rotate more smoothly.

[0024] In an alternative embodiment, the pre-pump filtering device further includes a water delivery pipe and a nozzle. The water delivery pipe is connected to the support, the nozzle is located outside the filter screen and is connected to the water delivery pipe, and the nozzle faces the filter screen;

[0025] Wherein, the spraying direction of the nozzle is tangent to the outer surface of the filter screen, or the spraying direction of the nozzle is skew to the axis of the filter screen, so that the nozzle can wash the surface of the filter screen and drive the filter screen to rotate.

[0026] Beneficial effects: By providing a water delivery pipe and a nozzle, and the spraying direction of the nozzle is tangent to the outer surface of the filter screen or skewed with the axis of the filter screen. During the process of the nozzle spraying water, the water flow impacts the surface of the filter screen. On the one hand, it can wash away the impurities intercepted by the filter screen, reduce the problem of impurity blockage of the filter screen, and ensure the filtration efficiency of the filter screen. On the other hand, the impact force of the water flow can drive the filter screen to rotate, that is, the impact force of the water flow and the driving force of the impeller act together to drive the filter screen to rotate, thereby providing a greater driving force for the filter screen and improving the reliability of the rotation of the filter screen.

[0027] In an alternative embodiment, the pre-pump filtering device further includes a cover, the cover seals the pipe orifice of the water outlet pipe located inside the filter screen, the cover is provided with a through hole for the rotating shaft to pass through, the cover is rotatably connected to the rotating shaft, the pipe orifice of the water outlet pipe located outside the filter screen forms the water outlet, and the water inlet is arranged on the side wall of the water outlet pipe.

[0028] In an alternative embodiment, the water inlet faces the bottom of the support.

[0029] Beneficial effects: By arranging the water inlet towards the bottom of the support, it can prevent air from entering the air inlet and causing damage to the water pump.

[0030] In a second aspect, the present invention further provides a water supply system, including a water pump and the pre-pump filtering device as described above, and the inlet of the water pump is connected to the water outlet.

[0031] Beneficial effects: The water supply system includes the pre-pump filtering device, and thus includes all the above advantages of the pre-pump filtering device, so it will not be elaborated here. Description of the Drawings

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related technical solutions. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 It is the front view of a pre-pump filtering device according to an embodiment of the present invention;

[0034] Figure 2 It is Figure 1 The A-A cross-sectional view of the view shown;

[0035] Figure 3 It is Figure 1 The top view of the view shown;

[0036] Figure 4 For Figure 1 the left view of the shown figure;

[0037] Figure 5 the schematic structural view of the support rod and the connecting rod connected in the embodiment of the present utility model;

[0038] Figure 6 the schematic principle view of the pre-pump filtration device in the embodiment of the present utility model.

[0039] Explanation of reference numerals:

[0040] 1, support; 2, water outlet pipe; 201, water inlet; 202, water outlet; 3, rotating shaft; 4, impeller; 5, filter screen; 6, first end cover; 7, second end cover; 8, support frame; 801, support rod; 802, bending part; 9, connecting rod; 10, rotary sealing structure; 11, first connecting disc; 12, water delivery pipe; 13, nozzle; 14, cover; 15, mounting seat; 16, second connecting disc. Specific embodiments

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0042] In the related art, the pre-pump filtration device includes a support, a rotating shaft, blades, a water outlet pipe and a filter cartridge. The water outlet pipe is installed on the support. The rotating shaft is rotationally matched with the water outlet pipe, and the filter cartridge is rotatably sleeved on one end of the water outlet pipe through a bearing, and the filter cartridge is also connected to the rotating shaft. That is, in order to improve the rigidity of the filter cartridge and ensure the support effect on the filter cartridge, one end of the filter cartridge is supported on the water outlet pipe, and the other end is supported on the rotating shaft. The part of the water outlet pipe located inside the filter cartridge is provided with a water inlet, and the part located outside the filter cartridge is provided with a water outlet. The blades are installed on the rotating shaft and are located between the water outlet and the water inlet.

[0043] Since the diameter of the water outlet pipe is usually large, the size of the bearing between the filter cartridge and the water outlet pipe is also large. Therefore, non-standard bearings are often required, resulting in a high cost of the pre-pump filtration device. Or, a bearing bracket is sleeved on the water outlet pipe, and a plurality of bearings are arranged on the bearing bracket. The plurality of bearings are distributed along the circumferential direction of the water outlet pipe, and the plurality of bearings jointly support the filter cartridge. In this way, the number of bearings increases, which also leads to a high cost of the pre-pump filtration device.

[0044] Therefore, to solve the problem that in the pre-pump filtering device in the related art, the filter cartridge needs to be supported by a bearing provided outside the water outlet pipe, resulting in a relatively high cost, an embodiment of the present utility model provides a pre-pump filtering device and a water supply system.

[0045] The following will describe the pre-pump filtering device provided in the embodiments of the present utility model in conjunction with Figures 1 to 6 ,

[0046] Specifically, the pre-pump filtering device includes a support 1, a water outlet pipe 2, a rotating shaft 3, an impeller 4, a filter screen 5, a first end cover 6, a second end cover 7, and a support frame 8.

[0047] Among them, the water outlet pipe 2 is connected to the support 1. For example, the water outlet pipe 2 can be connected to the support 1 by welding or by means of threaded fasteners. An inlet 201 and an outlet 202 are provided on the water outlet pipe 2.

[0048] The rotating shaft 3 is rotatably connected to the support 1 and the water outlet pipe 2 respectively. For example, one end of the rotating shaft 3 is rotatably connected to the support 1 through a bearing, and the other end of the rotating shaft 3 extends into the water outlet pipe 2 and is rotatably connected to the water outlet pipe 2 through a bearing.

[0049] The impeller 4 is arranged on the rotating shaft 3, and the impeller 4 is located between the inlet 201 and the outlet 202, so that when water flows from the inlet 201 to the outlet 202, it can flow through the surface of the impeller 4 to drive the impeller 4 to rotate.

[0050] The filter screen 5 forms a cylindrical structure, and the first end cover 6 and the second end cover 7 are respectively arranged at both ends of the filter screen 5, that is, the first end cover 6 and the second end cover 7 are respectively arranged at both ends of the cylindrical structure. Among them, the first end cover 6 is sleeved outside the water outlet pipe 2, and there is a gap between the first end cover 6 and the water outlet pipe 2 or they are in clearance fit, so that the first end cover 6 can rotate relative to the water outlet pipe 2. The second end cover 7 is connected to the rotating shaft 3. The support frame 8 is arranged inside the filter screen 5, and the support frame 8 connects the filter screen 5 and the rotating shaft 3, that is, the part of the rotating shaft 3 located outside the water outlet pipe 2 is connected to the filter screen 5 through the support frame 8. The inlet 201 is located inside the filter screen 5, so that the water inside the filter screen 5 can enter the water outlet pipe 2 through the inlet 201. It can be understood that the inside of the filter screen 5 described herein refers to the internal space of the cylindrical structure formed by the filter screen 5.

[0051] In this embodiment, in use, the outlet 202 of the water outlet pipe 2 is connected to the inlet of the water pump, and the water passes through the filter screen 5 and then enters the inside of the filter screen 5. Under the action of the water pump, the water inside the filter screen 5 enters the water pump through the inlet 201 and the outlet 202, and when the water flow passes through the surface of the impeller 4, it drives the impeller 4 to rotate. The impeller 4 drives the rotating shaft 3 to rotate, and the rotating shaft 3 drives the filter screen 5 to rotate through the support frame 8 and the second end cover 7, reducing the accumulation of impurities on the surface of the filter screen 5.

[0052] Reference Figure 6 Figure 6 As shown, in the pre-pump filtering device provided in this embodiment, the filter screen 5 is arranged on the rotating shaft 3 through the support frame 8 and the second end cover 7, that is, the rotating shaft 3 supports the filter screen 5 through the support frame 8 and the second end cover 7 at the same time, which can ensure the support effect on the filter screen 5. The first end cover 6 of the filter screen 5 does not support on the water outlet pipe 2. Therefore, there is no need to set a non-standard bearing or multiple small bearings between the first end cover 6 of the filter screen 5 and the water outlet pipe 2, saving the bearing between the first end cover 6 and the water outlet pipe 2 compared with the pre-pump filtering device in the related art, thereby reducing the cost of the pre-pump filtering device.

[0053] In addition, since the bearing between the first end cover 6 and the water outlet pipe 2 is saved, the loss of the rotating power of the filter screen 5 caused by the bearing between the first end cover 6 and the water outlet pipe 2 is reduced, making the rotating resistance of the filter screen 5 smaller and the rotation smoother.

[0054] In some embodiments provided by the present utility model, the pre-pump filtering device further includes a floating cylinder. The floating cylinder is connected to the support 1, and the floating cylinder is used to make the pre-pump filtering device float on the water surface. For example, the number of floating cylinders is set to two, and the two floating cylinders are respectively arranged on both sides of the support 1. Among them, in the floating state of the pre-pump filtering device, the water outlet pipe 2 is below the water surface, and a part of the filter screen 5 is above the water surface and another part is below the water surface.

[0055] Since there are more underwater sand and gravel or fish and insects, by setting the floating cylinder, the pre-pump filtering device can float on the water surface, which can reduce the blockage of the filter screen by sand and gravel or fish and insects. By making the water outlet pipe 2 below the water surface, the problem of the water outlet pipe 2 sucking air can be reduced, avoiding the damage of the water pump by inhaling air. By making a part of the filter screen 5 above the water surface and another part below the water surface, not only can water enter the filter screen 5, but also the resistance of the water body to the filter screen 5 can be reduced, making the rotation of the filter screen 5 smoother.

[0056] In some embodiments provided by the present utility model, the pre-pump filtering device further includes a water delivery pipe 12 and a nozzle 13. The water delivery pipe 12 is connected to the support 1, the nozzle 13 is located outside the filter screen 5 and connected to the water delivery pipe 12, the nozzle 13 faces the filter screen 5, and is used to spray water flow onto the filter screen 5. Specifically, when the pre-pump filtering device is in a floating state, the nozzle 13 is above the liquid level to reduce the obstruction of the water flow ejected by the nozzle 13 caused by the water body.

[0057] Among them, the spraying direction of the nozzle 13 is tangent to the outer surface of the filter screen 5, or the spraying direction of the nozzle 13 is skew to the axis of the filter screen 5, so that the nozzle 13 can wash the surface of the filter screen 5 and drive the filter screen 5 to rotate.

[0058] In this embodiment, by providing a water delivery pipe 12 and a nozzle 13, and the jet direction of the nozzle 13 being tangent to the outer surface of the filter screen 5 or being skew to the axis of the filter screen 5, during the process of the nozzle 13 jetting water, the water flow impacts the surface of the filter screen 5. On the one hand, it can wash away the impurities intercepted by the filter screen 5, reduce the problem of impurity blockage of the filter screen 5, and ensure the filtration efficiency of the filter screen 5. On the other hand, the impact force of the water flow can drive the filter screen 5 to rotate, that is, the impact force of the water flow and the driving force of the impeller 4 act together to drive the filter screen 5 to rotate, so as to provide a greater driving force for the filter screen 5 and improve the reliability of the rotation of the filter screen 5.

[0059] Optionally, a flow dividing valve is provided at the outlet of the water pump. The flow dividing valve is connected to the water delivery pipe 12 and the irrigation water pipe, so that the water pumped by the water pump can be used to wash the filter screen 5 and irrigate crops.

[0060] Reference Figures 1 - 4 As shown, in some embodiments provided by the present utility model, the pre-pump filtering device further includes a first connection disk 11 connected to the rotating shaft 3. For example, the first connection disk 11 can be connected to the rotating shaft 3 by welding or key connection. The support frame 8 includes a plurality of support rods 801. The plurality of support rods 801 are sequentially arranged along the circumferential direction of the rotating shaft 3. The two ends of the support rod 801 are respectively connected to the first connection disk 11 and the filter screen 5.

[0061] In this embodiment, by providing the first connection disk 11 on the rotating shaft 3, the installation area on the rotating shaft 3 can be increased, so that the support rod 801 can be connected to the rotating shaft 3 through the first connection disk 11. The support frame 8 includes a plurality of support rods 801 distributed along the circumferential direction of the rotating shaft 3. On the one hand, an avoidance space for the water flow to pass through is formed between adjacent support rods 801, and on the other hand, the weight of the support frame 8 can be reduced, so that the rotation of the filter screen 5 is smoother.

[0062] Optionally, the support rod 801 is connected to the first connection disk 11 through at least two threaded connectors, so as to facilitate disassembling the support rod 801 from the first connection disk 11.

[0063] In some embodiments provided by the present utility model, the pre-pump filtering device further includes a connecting rod 9. The connecting rod 9 is connected between the first end cover 6 and the second end cover 7. For example, the connecting rod 9 is respectively welded to the first end cover 6 and the second end cover 7 or connected by threaded fasteners. The connecting rod 9 abuts against the inner wall of the filter screen 5. For example, the connecting rod 9 can also be welded to the filter screen 5. All the support rods 801 are connected to the corresponding connecting rod 9. For example, each connecting rod 9 is connected to the corresponding support rod 801.

[0064] In this embodiment, a connecting rod 9 is arranged between the first end cover 6 and the second end cover 7, and the connecting rod 9 is supported on the inner wall of the filter screen 5, which can improve the overall rigidity of the filter screen 5 and avoid the problem that the filter screen 5 collapses inward due to the water pressure. By connecting the support rod 801 to the corresponding connecting rod 9, the support rod 801 can support the connecting rod 9, improve the rigidity of the connecting rod 9, reduce the problem of bending deformation of the connecting rod 9, and ensure the support effect of the connecting rod 9 on the filter screen 5.

[0065] In some embodiments provided by the present utility model, a bent portion 802 is arranged at one end of the support rod 801 away from the rotating shaft 3, the extending direction of the bent portion 802 is the same as the axial direction of the rotating shaft 3, and the bent portion 802 is connected to the filter screen 5. Specifically, the bent portion 802 is connected to the filter screen 5 through the connecting rod 9.

[0066] In this embodiment, by arranging the bent portion 802 at one end of the support rod 801 away from the rotating shaft 3, the bent portion 802 extends along the axial direction of the rotating shaft 3, and the bent portion 802 is connected to the filter screen 5 or the connecting rod 9. The contact area between the bent portion 802 and the filter screen 5 or the connecting rod 9 is relatively large. On the one hand, it can improve the support effect on the connecting rod 9 or the filter screen 5, and on the other hand, it is convenient for the bent portion 802 to be connected to the filter screen 5 or the connecting rod 9. For example, the bent portion 802 can be connected to the connecting rod 9 or the filter screen 5 through threaded fasteners, so as to facilitate the disassembly of the bent portion 802 from the connecting rod 9 or the filter screen 5.

[0067] In some embodiments provided by the present utility model, the pre-pump filtering device further includes a second connection disk 16. The second connection disk 16 is sleeved on the rotating shaft 3. For example, the second connection disk 16 is welded or key-connected to the rotating shaft 3. The second end cover 7 is connected to the second connection disk 16.

[0068] In this embodiment, by arranging the second connection disk 16 on the rotating shaft 3, the installation area on the rotating shaft 3 can be increased, so that the second end cover 7 can be connected to the rotating shaft 3 through the second connection disk 16.

[0069] Optionally, the second end cover 7 can be connected to the second connection disk 16 through threaded fasteners, so as to facilitate the disassembly of the second end cover 7 and the second connection disk 16.

[0070] In some embodiments provided by the present utility model, the pre-pump filtering device further includes a rotary seal structure 10. The rotary seal structure 10 is arranged between the first end cover 6 and the water outlet pipe 2 and is used to seal the gap between the first end cover 6 and the water outlet pipe 2. In this embodiment, by arranging the rotary seal structure 10 between the first end cover 6 and the water outlet pipe 2, the gap between the first end cover 6 and the water outlet pipe 2 can be sealed, avoiding the problem that water enters the inside of the filter screen 5 directly from the gap between the first end cover 6 and the water outlet pipe 2 without passing through the filter screen 5.

[0071] In some embodiments provided by the present utility model, the pre-pump filtering device further includes a sealing cover 14. The sealing cover 14 plugs the pipe orifice of the water outlet pipe 2 located inside the filter screen 5. The sealing cover 14 is provided with a through hole for the rotating shaft 3 to pass through. The sealing cover 14 is rotatably connected to the rotating shaft 3. For example, bearings are installed on the sealing cover 14, and the sealing cover 14 is rotatably connected to the rotating shaft 3 through the bearings. The pipe orifice of the water outlet pipe 2 located outside the filter screen 5 forms a water outlet 202, and the water inlet 201 is arranged on the side wall of the water outlet pipe 2.

[0072] In some embodiments provided by the present utility model, the pre-pump filtering device further includes a mounting seat 15. The mounting seat 15 is arranged inside the water outlet pipe 2. There is a distance between the mounting seat 15 and the sealing cover 14. The impeller 4 is arranged between the mounting seat 15 and the sealing cover 14. The rotating shaft 3 is rotationally matched with the mounting seat 15 through bearings.

[0073] In this embodiment, the support 1, the sealing cover 14 and the mounting seat 15 jointly support the rotating shaft 3, which can improve the rigidity of the rotating shaft 3, reduce the problem of bending deformation of the rotating shaft 3, and enable the rotating shaft 3 to provide a better supporting effect for the filter screen 5. In addition, the impeller 4 is arranged between the sealing cover 14 and the mounting seat 15. The common support of the sealing cover 14 and the mounting seat 15 can reduce the problem of deformation of the part of the rotating shaft 3 between the sealing cover 14 and the mounting seat 15 due to the acting force of the impeller 4, and enable the rotating shaft 3 to provide a better supporting effect for the impeller 4.

[0074] In some embodiments provided by the present utility model, the water inlet 201 faces the bottom of the support 1, that is, the water inlet 201 is arranged at the bottom of the water outlet pipe 2. In this embodiment, by arranging the water inlet 201 towards the bottom of the support 1, the problem of air entering the air inlet and causing damage to the water pump can be avoided.

[0075] An embodiment of the present utility model also provides a water supply system.

[0076] Specifically, the water supply system includes a water pump and the pre-pump filtering device as described above. Among them, the inlet of the water pump is connected to the water outlet 202 of the water outlet pipe 2.

[0077] It should be noted that since the water supply system includes the pre-pump filtering device, it also includes all the above advantages of the pre-pump filtering device, so it will not be elaborated here.

[0078] Optionally, the water supply system can be used in a drip irrigation system.

[0079] Although the embodiments of the present utility model are described with reference to the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A pre-pump filter device, characterized in that: include: Support (1); A water outlet pipe (2) connected to the support (1), the water outlet pipe (2) being provided with a water inlet (201) and a water outlet (202); A rotating shaft (3) is rotatably connected to the support (1) and the water outlet pipe (2) respectively; An impeller (4) is disposed on the rotating shaft (3) and is located between the water inlet (201) and the water outlet (202); A filter screen (5), a first end cover (6), a second end cover (7) and a support frame (8), wherein the filter screen (5) forms a cylindrical structure, the first end cover (6) and the second end cover (7) are respectively arranged at two ends of the filter screen (5), the first end cover (6) is sleeved on the outside of the water outlet pipe (2), the second end cover (7) is connected to the rotating shaft (3), the support frame (8) is arranged inside the filter screen (5) and connects the filter screen (5) and the rotating shaft (3), and the water inlet (201) is located inside the filter screen (5).

2. The pre-pump filter device according to claim 1, characterized in that: The pre-pump filter device also includes a first connecting plate (11) connected to the rotating shaft (3), and the support frame (8) includes a plurality of support rods (801), and the plurality of support rods (801) are arranged in sequence along the circumference of the rotating shaft (3), and the two ends of the support rods (801) are respectively connected to the first connecting plate (11) and the filter screen (5).

3. The pre-pump filter device according to claim 2, characterized in that: The pre-pump filter device also includes a connecting rod (9), which is connected between the first end cover (6) and the second end cover (7), and the connecting rod (9) is abutted against the inner wall of the filter screen (5), and the support rods (801) are all connected to the corresponding connecting rods (9).

4. The pre-pump filter device according to claim 2, characterized in that: A bent portion (802) is provided at one end of the support rod (801) that is away from the rotating shaft (3); the extending direction of the bent portion (802) is consistent with the axial direction of the rotating shaft (3); and the bent portion (802) is connected to the filter screen (5).

5. The pre-pump filter device according to any one of claims 1 to 4, characterized in that: The pre-pump filter device also includes a rotary sealing structure (10), which is arranged between the first end cover (6) and the water outlet pipe (2) and is used to seal the gap between the first end cover (6) and the water outlet pipe (2).

6. The pre-pump filter device according to any one of claims 1 to 4, characterized in that: The pre-pump filter device also includes a float, which is connected to the support (1) and is used to make the pre-pump filter device float on the water surface, wherein when the pre-pump filter device is floating, the water outlet pipe (2) is located below the water surface, and a part of the filter screen (5) is located above the water surface, and another part is located below the water surface.

7. The pre-pump filter device according to any one of claims 1 to 4, characterized in that: The pre-pump filtering device further comprises a water delivery pipe (12) and a nozzle (13), wherein the water delivery pipe (12) is connected to the support (1), and the nozzle (13) is located outside the filter screen (5) and connected to the water delivery pipe (12), and the nozzle (13) faces the filter screen (5); The spraying direction of the nozzle (13) is tangent to the outer surface of the filter (5), or the spraying direction of the nozzle (13) is not in the same plane as the axis of the filter (5), so that the nozzle (13) can wash the surface of the filter (5) and drive the filter (5) to rotate.

8. The pre-pump filter device according to any one of claims 1 to 4, characterized in that: The pre-pump filter device also includes a sealing cover (14), the sealing cover (14) blocks the pipe opening of the water outlet pipe (2) located inside the filter (5), the sealing cover (14) is provided with a through hole for the rotating shaft (3) to pass through, the sealing cover (14) is rotatably connected to the rotating shaft (3), the pipe opening of the water outlet pipe (2) located outside the filter (5) forms the water outlet (202), and the water inlet (201) is arranged on the side wall of the water outlet pipe (2).

9. The pre-pump filter device according to any one of claims 1 to 4, characterized in that: The water inlet (201) faces the bottom of the support (1).

10. A water supply system, characterized in that: It comprises a water pump and a pre-pump filter device as claimed in any one of claims 1 to 9, wherein the inlet of the water pump is connected to the water outlet (202).

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