Self-cleaning filter device and self-cleaning sprayer or filter system

Abstract

The present invention discloses a self-cleaning filter device and a self-cleaning sprayer or filter system thereof. The self-cleaning filter device comprises a hydraulic pump (3) and a filter core. The filter core is provided with a liquid inlet pipe (44) and a liquid outlet pipe (41). The liquid outlet pipe (41) is connected to the hydraulic pump (3). The hydraulic pump (3) is provided with at least two outputs, one of which is connected to the liquid inlet pipe (44). A flow guide device (5) is provided in the filter inner cavity at the outlet of the liquid inlet pipe (44). Compared with the prior art, the present invention only needs to set up a filter core to form a backwashing filter system, so that the filter system is simpler and has a good self-cleaning effect, and can greatly improve the system efficiency.

Description

Technical Field

[0001] The invention relates to a self-cleaning filtering device and a self-cleaning sprayer or filtering system thereof. Background Art

[0002] After the filter has been used for a period of time, the impurities on the filter will accumulate over time and will easily become clogged, so the filter needs to be cleaned regularly.

[0003] The current treatment method is generally to replace the filter element or clean it, and the cleaning includes manual cleaning and self-cleaning.

[0004] For complex filtering mechanisms, manual cleaning is often used, which is inefficient and labor-intensive. For some special equipment, such as the filters in agricultural plant protection sprayers, they must be cleaned during operation. In this case, manual cleaning is prone to safety problems.

[0005] The current self-cleaning filters usually have the following cleaning methods: setting a cleaning brush on the filter screen or filter element wall for cleaning and using a reverse liquid flow for cleaning. The cleaning brush generally needs to drive the brush body, has a complex structure, and has a high failure rate. The self-cleaning filter disclosed in CN206366239U and CN203971553U is a filtering device that uses a reverse liquid flow to remove impurities. It usually uses more than two filter elements to input the clean water filtered by one of the filter elements into the clean water part of another filter element for reverse flushing. Such as the backwash self-cleaning filter disclosed in CN200939363Y, CN202921080U, and CN205031972U. This type of filter uses more than two filter elements in parallel. First, the structure is complex and more than two filter elements need to be set. It is difficult to apply to situations where there are restrictions on the filter element setting. Second, the pressure of the liquid water flow generated by the parallel filter element is relatively small, and the backwashing effect is not good.

[0006] Therefore, a self-cleaning filter device and a self-cleaning sprayer or a filter system which only needs to be provided with one filter element and can realize backwashing and has a good self-cleaning effect have been developed. Summary of the invention

[0007] The object of the present invention is to provide a self-cleaning filter device and a self-cleaning sprayer or a filter system which only needs to be provided with one filter element and can realize backwashing and has a good self-cleaning effect.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: the self-cleaning filter device comprises a hydraulic pump (3) and a filter core, the filter core comprises at least a filter screen (42) and a filter screen frame (43), and the filter screen (42) and the filter screen frame (43) constitute a filter inner cavity, a liquid inlet pipe (44) and a liquid outlet pipe (41) are provided on the filter core, the liquid outlet pipe (41) is connected to the hydraulic pump (3), the hydraulic pump (3) is provided with at least two outputs, one of which is connected to the liquid inlet pipe (44), and a flow guide device (5) is provided in the filter inner cavity at the outlet of the liquid inlet pipe (44), and the flow guide device (5) is a mechanism for guiding the liquid in the liquid inlet pipe (44) to the inner wall of the filter screen (42).

[0009] Furthermore, the filter screen (42) constitutes the barrel wall, the filter screen frame (43) is arranged at both ends of the barrel wall to form a barrel-shaped body, and the guide device (5) includes a guide plate (51), which is an umbrella-shaped conical disc-shaped body, and the conical disc-shaped body has a vertebral tip facing the pipe opening of the liquid inlet pipe (44).

[0010] Furthermore, the guide plate (51) is arranged on the shaft (55), and a propulsion blade (53) is arranged on the conical surface of the guide plate (51), and the propulsion blade (53) is spirally inclined on the guide plate (51). A collecting plate (52) is arranged on the outer edge of the guide plate (51), and the collecting plate (52) is an annular plate. The collecting plate (52) and the guide plate (51) are interlocked to form a disc-shaped cavity, and the mouth of the disc-shaped cavity is opposite to the liquid inlet pipe (44). At least one liquid outlet is arranged at the edge of the disc-shaped cavity, and a backwash nozzle (54) is arranged at the liquid outlet.

[0011] Furthermore, the outlet of the backwash nozzle (54) is a long strip-shaped outlet along the axial direction of the filter screen (42), or is an array of a plurality of spray holes.

[0012] Furthermore, the filter screen (42) is preferably provided with a debris collection mechanism outside, the debris collection mechanism comprising a connecting frame (61) linked to the guide plate (51), at least one debris collection tank (63) is provided on the connecting frame (61), the debris collection tank (63) is a tank body axially buckled outside the filter screen (42), and a liquid outlet is provided at the end of the tank body.

[0013] Furthermore, a first annular groove (62) is provided at the liquid outlet of the above-mentioned impurity liquid collecting groove (63), the bottom edge of the first annular groove (62) is connected to the liquid outlet of the impurity liquid collecting groove (63), the first annular groove (62) is linked to the connecting frame (61), and the impurity collecting mechanism is provided with a second annular groove (64) corresponding to the first annular groove (62), the second annular groove (64) and the first annular groove (62) are interlocked to form a closed cavity, and an impurity discharge pipe (65) is provided on the closed cavity.

[0014] Furthermore, a cleaning brush 66 is provided at the impurity-containing liquid collecting tank (63). Of course, the cleaning brush 66 can also be replaced by a scraper.

[0015] Furthermore, a liquid distributor (2) is preferably provided between the hydraulic pump (3) and the filter element, and at least one delivery pipeline is provided between the liquid distributor (2) and the hydraulic pump (3), and the liquid distributor (2) is provided with at least two outputs, one of which is connected to the liquid inlet pipe (44) of the filter element.

[0016] Furthermore, the self-cleaning filter device can further constitute a plant protection sprayer, and the filter element of the present invention is arranged in the medicine box (1). Since the self-cleaning filter device in the plant protection sprayer can greatly reduce the probability of clogging of the filter device, extend the maintenance cycle, and improve production efficiency, in particular, it can avoid maintenance and cleaning during the operation period, changing the previous situation of manual maintenance and cleaning of the plant protection sprayer during the operation period, which reduces production efficiency, has high labor intensity, and is particularly prone to endangering personal safety.

[0017] Furthermore, the filter screen (42) constitutes the barrel wall, the filter screen frame (43) is arranged at both ends of the barrel wall to form a barrel-shaped body, and the guide device (5) includes a guide plate (51), which is an umbrella-shaped conical disc-shaped body, and the conical disc-shaped body has a vertebral tip facing the pipe opening of the liquid inlet pipe (44).

[0018] Furthermore, the above-mentioned self-cleaning filter device can constitute other filter systems or devices, which also have the advantages of reducing the probability of filter device blockage, extending the maintenance cycle, reducing labor intensity and improving production efficiency.

[0019] Compared with the prior art, the present invention only needs to set up one filter element to form a backwash filtration system, which makes the filtration system simpler and has a good self-cleaning effect, and can greatly improve the system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of the filter element according to Example 1 of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of the filter element according to Example 2 of the present invention.

[0023] Figure 4 for Figure 3 Schematic diagram of the structure along section A_A.

[0024] Figure 5 for Figure 3Schematic diagram of the structure along section B_B.

[0025] Figure 6 This is a schematic diagram of the structure of the filter element according to Example 3 of the present invention.

[0026] Figure 7 for Figure 6 Schematic diagram of the structure along section C_C.

[0027] Figure 8 for Figure 6 Schematic diagram of the structure along the D_D section.

[0028] Fig. 9 for Figure 6 Schematic diagram of the structure along section E_E.

[0029] Fig.10 It is a schematic diagram of the structure of the filter element of Example 4 of the present invention.

[0030] Fig.11 This is a schematic diagram of the structure of Example 5 of the present invention.

[0031] The reference numerals include: medicine box 1, liquid distributor 2, nozzle 21, pressure relief valve 22, hydraulic pump 3, liquid outlet pipe 41, filter screen 42, filter screen frame 43, liquid inlet pipe 44, guide device 5, including guide plate 51, collecting plate 52, propulsion blade 53, backwash nozzle 54, shaft 55 connecting frame 61, first annular groove 62, debris collection groove 63, second annular groove 64, debris discharge pipe 65, cleaning brush 66. DETAILED DESCRIPTION

[0032] To make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] Example 1: Reference Figure 1-2, is a structural schematic diagram of embodiment 1 of the present invention, which is a self-cleaning filter device and a self-cleaning sprayer constituted by the self-cleaning filter device, the self-cleaning filter device comprises a hydraulic pump 3 and a filter core body, the filter core body at least comprises a filter screen 42 and a filter screen frame 43, and the filter screen 42 and the filter screen frame 43 constitute a filter cavity, the filter core body is provided with a liquid inlet pipe 44 and a liquid outlet pipe 41, the liquid outlet pipe 41 is connected to the hydraulic pump 3, the hydraulic pump 3 is provided with at least two outputs, one of which is connected to the liquid inlet pipe on the filter core body. 44 is connected, and a guide device 5 is provided in the filtering inner cavity at the outlet of the liquid inlet pipe 44, and the guide device 5 is a mechanism for guiding the liquid in the liquid inlet pipe 44 to the inner wall of the filter screen 42. In this embodiment, the filter screen 42 constitutes the barrel wall, and the filter screen frame 43 is arranged at both ends of the barrel wall to form a barrel-shaped body. The guide device 5 includes a guide plate 51, and the guide plate 51 is an umbrella-shaped conical disc-shaped body. The apex of the conical disc-shaped body faces the pipe mouth of the liquid inlet pipe 44, and the rear part of the conical disc-shaped body is a cylindrical barrel-shaped grid or grid-shaped body.

[0034] In the present embodiment, the agricultural plant protection sprayer is constructed, in which the filter element of the present invention is arranged in a medicine box 1, a liquid distributor 2 is provided between the hydraulic pump 3 and the filter element, and three delivery pipelines are provided between the liquid distributor 2 and the hydraulic pump 3. The liquid distributor 2 is provided with four outputs, one of which is connected to the liquid inlet pipe 44 of the filter element, one is a pressure relief circuit, and the excess pressure in the liquid distributor 2 is released through the pressure relief valve 22 and sent back to the medicine box 1, and the other two outputs are spraying pipelines.

[0035] The working process is as follows: after the hydraulic pump 3 is started, the filter element starts to work, the spraying pipeline is in working state, and when the working pressure in the liquid distributor 2 is relatively large, backwashing liquid will be generated in the liquid inlet pipe 44. When the spraying pipeline is in full load working state, the backwashing liquid generated in the liquid inlet pipe 44 is relatively weak. When the sprayer is at the edge of the field, there will generally be a short stop in spraying. The backwashing liquid pressure in the liquid inlet pipe 44 will increase instantaneously, resulting in strong flushing of the filter element, ensuring that the filter element is always in a normal state during normal spraying operation.

[0036] The solid arrow in the figure shows the direction of the spray filtration water flow, and the dotted arrow shows the direction of the self-cleaning water flow.

[0037] Example 2: Reference Figure 3-5, is a structural schematic diagram of Example 2 of the present invention. Compared with Example 1, the difference of this embodiment is that: the guide plate 51 is arranged on the shaft 55, and a propulsion blade 53 is arranged on the vertebral surface of the guide plate 51. The propulsion blade 53 is spirally inclined on the guide plate 51, and a collecting plate 52 is arranged on the outer edge of the guide plate 51. The collecting plate 52 is an annular plate. The collecting plate 52 and the guide plate 51 are interlocked to form a disc-shaped cavity. The mouth of the disc-shaped cavity is opposite to the liquid inlet pipe 44. At least one liquid outlet is arranged at the edge of the disc-shaped cavity. A backwash nozzle 54 is arranged at the liquid outlet. In this embodiment, the outlet of the backwash nozzle 54 is a long strip-shaped opening along the axial direction of the filter screen 42.

[0038] Example 3: Reference Figure 6-9 , is a schematic diagram of the structure of Embodiment 3 of the present invention. Compared with the previous embodiments, the difference of this embodiment is that: the filter screen 42 is provided with a debris collection mechanism outside, and the debris collection mechanism includes a connecting frame 61 linked with the guide plate 51, and at least one debris collection tank 63 is provided on the connecting frame 61. The debris collection tank 63 is a tank body axially buckled outside the filter screen 42, and a liquid outlet is provided at the end of the tank body. The liquid outlet of the debris collection tank 63 is provided with a first annular groove 62, and the bottom edge of the first annular groove 62 is connected to the liquid outlet of the debris collection tank 63. The first annular groove 62 is linked with the connecting frame 61, corresponding to the first annular groove 62, and the debris collection mechanism is provided with a second annular groove 64, and the second annular groove 64 is buckled with the first annular groove 62 to form a closed cavity, and a debris discharge pipe 65 is provided on the closed cavity.

[0039] Example 4: Reference Fig.10 , is a schematic diagram of the structure of Example 4 of the present invention. Compared with the previous embodiments, the difference of this embodiment is that a cleaning brush 66 is further provided at the impurity liquid collecting tank 63.

[0040] Furthermore, the cleaning brush 66 mentioned above may also be replaced by a scraper.

[0041] Example 5: Reference Fig.11 , is a schematic diagram of the structure of Example 4 of the present invention. Compared with the previous embodiments, the difference of this embodiment is that: the hydraulic pump 3 is provided with 3 outputs, one of which is connected to the liquid inlet pipe 44, at least one of which is a spraying pipeline, and the other can be used as a spraying pipeline or as a pressure relief pipeline.

[0042] A flow guide device 5 is provided in the filter inner cavity at the outlet of the liquid inlet pipe 44. The flow guide device 5 is a mechanism for guiding the liquid in the liquid inlet pipe 44 to the inner wall of the filter screen 42. The liquid inlet pipe 44 and the liquid outlet pipe 41 of the filter core are both arranged on the filter screen frame 43 at one end of the filter inner cavity. The flow guide device 5 comprises a flow guide plate 51, which is an umbrella-shaped conical disc-shaped body. The conical disc-shaped body has a conical tip facing the pipe opening of the liquid inlet pipe 44, and the front part of the conical disc-shaped body is a cylindrical barrel-shaped grid or grid-shaped body.

[0043] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A self-cleaning filter device, characterized in that: The invention comprises a hydraulic pump (3) and a filter core, wherein the filter core comprises at least a filter screen (42) and a filter screen frame (43), and the filter screen (42) and the filter screen frame (43) form a filter inner cavity, and a liquid inlet pipe (44) and a liquid outlet pipe (41) are provided on the filter core, and the liquid outlet pipe (41) is connected to the hydraulic pump (3), and the hydraulic pump (3) is provided with at least two outputs, one of which is connected to the liquid inlet pipe (44), and a flow guide device (5) is provided in the filter inner cavity at the outlet of the liquid inlet pipe (44), and the flow guide device (5) is a mechanism for guiding the liquid in the liquid inlet pipe (44) to the inner wall of the filter screen (42); The filter screen (42) forms a barrel wall, the filter screen frame (43) is arranged at both ends of the barrel wall to form a barrel-shaped body, and the flow guide device (5) comprises a flow guide plate (51), the flow guide plate (51) is an umbrella-shaped conical disc-shaped body, and the conical disc-shaped body has a vertebral tip facing the pipe opening of the liquid inlet pipe (44); The guide plate (51) is arranged on the shaft (55), and a propulsion blade (53) is arranged on the conical surface of the guide plate (51). The propulsion blade (53) is inclined in a spiral shape on the guide plate (51). A collecting plate (52) is arranged on the outer edge of the guide plate (51), and the collecting plate (52) is an annular plate. The collecting plate (52) and the guide plate (51) are interlocked to form a disc-shaped cavity. The mouth of the disc-shaped cavity is opposite to the liquid inlet pipe (44). At least one liquid outlet is arranged at the edge of the disc-shaped cavity, and a backwash nozzle (54) is arranged at the liquid outlet.

2. The self-cleaning filter device according to claim 1, characterized in that: The outlet of the backwash nozzle (54) is a long strip-shaped outlet along the axial direction of the filter screen (42), or is an array of a plurality of spray holes.

3. The self-cleaning filter device according to claim 2, characterized in that: The filter screen (42) is provided with a debris collection mechanism outside, the debris collection mechanism comprising a connecting frame (61) linked to the guide plate (51), at least one debris liquid collection groove (63) is provided on the connecting frame (61), the debris liquid collection groove (63) is a groove body axially buckled outside the filter screen (42), and a liquid outlet is provided at the end of the groove body.

4. The self-cleaning filter device according to claim 3, characterized in that: A first annular groove (62) is provided at the liquid outlet of the impurity-containing liquid collecting groove (63), the bottom edge of the first annular groove (62) is connected to the liquid outlet of the impurity-containing liquid collecting groove (63), the first annular groove (62) is linked to the connecting frame (61), and the impurity collecting mechanism is provided with a second annular groove (64) corresponding to the first annular groove (62), the second annular groove (64) and the first annular groove (62) are interlocked to form a closed cavity, and an impurity discharge pipe (65) is provided on the closed cavity.

5. The self-cleaning filter device according to claim 4, characterized in that: A cleaning brush (66) or a scraper is also provided at the impurity-containing liquid collection tank (63).

6. The self-cleaning filter device according to any one of claims 1 to 5, characterized in that: A liquid distributor (2) is provided between the hydraulic pump (3) and the filter element, at least one delivery pipeline is provided between the liquid distributor (2) and the hydraulic pump (3), and the liquid distributor (2) is provided with at least two outputs, one of which is connected to the liquid inlet pipe (44) of the filter element.

7. A self-cleaning sprayer, characterized in that: A self-cleaning filter device according to any one of claims 1 to 6 is provided.

8. A self-cleaning filtration system, characterized in that: A self-cleaning filter device according to any one of claims 1 to 6 is provided.

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