Multi-layer filter

Abstract

This utility model relates to the field of filter technology and discloses a multi-layer filter, including a housing. A support frame is fixedly connected to the outer wall of the housing, and a multi-layer filter assembly is arranged on the inner wall of the housing. The multi-layer filter assembly includes a coarse filter screen, a medium-coarse filter screen, and a fine filter screen, which are arranged from high to low on the inner wall of the housing. A motor is fixedly connected to the upper surface of the support frame, and a pinion gear is fixedly connected to the output end of the motor. In this utility model, after the motor starts, it drives the pinion gear to rotate, and the large gear meshing with it rotates accordingly. Through transmission, the coarse filter screen rotates synchronously. When the filter material enters through the feeding funnel, it is evenly dispersed under the action of the rotating coarse filter screen, and then passes through the medium-coarse filter screen and the fine filter screen in sequence to complete the graded filtration. This achieves the effect of preventing large particles from entering the pesticide tank from the source, avoiding nozzle clogging, and ensuring the continuous normal operation of the pesticide spraying equipment.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to multilayer filters. Background Technology

[0002] In agricultural pesticide spraying operations, the purity of the pesticide solution directly affects the spraying effect and equipment lifespan. To prevent impurities in the pesticide solution from clogging the nozzles and to ensure a stable spraying process, multi-layer filters have emerged as a key auxiliary device. These filters, through their multi-stage filtration structure, intercept impurities of different particle sizes, playing a crucial role in the pesticide tank feeding stage of pesticide spraying equipment.

[0003] Most existing pesticide spraying equipment uses a single fixed filter screen for feed filtration. The pesticide solution relies solely on its own gravity or flow inertia to pass through the filter screen, using the filter screen's pore size to intercept particles larger than the pore size. In some scenarios, simple manual shaking of the filter screen is added to reduce clogging.

[0004] However, when using this single fixed filter screen, impurities in the liquid tend to accumulate locally on the screen, resulting in insufficient filtration. Large particles that are not filtered can easily clog the spray nozzles after entering the tank, forcing the operation to be interrupted. Manual cleaning is required before the operation can continue, which affects the spraying efficiency. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a multi-layer filter, which aims to improve the problem that large particles in pesticide spraying equipment clog the nozzles due to the lack of a dedicated filtration device, making the equipment difficult to use normally.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-layer filter, including a housing, a support frame fixedly connected to the outer wall of the housing, and a multi-layer filter assembly provided on the inner wall of the housing;

[0007] The multi-layer filter assembly includes a coarse filter screen, a medium-coarse filter screen, and a fine filter screen. The coarse filter screen, the medium-coarse filter screen, and the fine filter screen are arranged in descending order on the inner wall of the housing. A motor is fixedly connected to the upper surface of the support frame. A small gear is fixedly connected to the output end of the motor. A large gear is rotatably connected to the upper side of the outer wall of the housing. The teeth of the small gear mesh with the teeth of the large gear. A feeding funnel is provided on the upper side of the inner wall of the housing. A disassembly assembly is provided on the upper surface of the coarse filter screen, the medium-coarse filter screen, and the fine filter screen.

[0008] Furthermore, the disassembly assembly includes a first fixing ring, the lower surface of which is attached to the upper surface of the coarse filter screen, a second fixing ring attached to the lower surface of the coarse filter screen, a positioning rod fixedly connected to the lower surface of the fixing ring, a spring fixedly connected to the inner wall of the second fixing ring, positioning holes provided in the coarse filter screen, the second fixing ring, the medium coarse filter screen, and the fine filter screen, and a fixing rod threadedly connected to the inner wall of the first fixing ring.

[0009] Furthermore, a second fixing ring is rotatably connected to the outer wall of the fixing rod, and the outer wall of the fixing rod is rotatably connected to the inner wall of the filter coarse screen.

[0010] Furthermore, the outer wall of the positioning rod is slidably connected to the inner wall of the positioning hole, and the outer wall of the positioning rod is slidably connected to the inner wall of the coarse filter screen.

[0011] Furthermore, the feeding funnel is located on the upper side of the inner wall of the outer shell, and the feeding funnel is located above the coarse filter screen.

[0012] Furthermore, the coarse filter screen is positioned below the coarse filter screen, and the fine filter screen is positioned below the coarse filter screen.

[0013] Furthermore, the coarse filter screen, the medium-coarse filter screen, and the fine filter screen are all disposed between the first fixed ring and the second fixed ring.

[0014] Furthermore, one end of the spring is attached to the lower surface of the fixing ring.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, after the motor starts, it drives the small gear to rotate, and the large gear meshing with it rotates accordingly. Through transmission, it drives the coarse filter screen to rotate synchronously. When the filter material enters through the feeding funnel, it is evenly dispersed under the action of the rotating coarse filter screen. Then, it passes through the medium coarse filter screen and the fine filter screen in sequence to complete the graded filtration. This solves the problem that pesticide spraying equipment lacks a dedicated filtration device, which causes large particles in the pesticide solution to clog the nozzles and make the equipment difficult to use normally. It achieves the effect of preventing large particles from entering the pesticide tank from the source, avoiding nozzle clogging, and ensuring the continuous normal operation of the pesticide spraying equipment.

[0017] 2. In this utility model, during the filtration process, fixing ring one and fixing ring two, together with positioning rod and spring, form a stable fixation for each filter screen. When the filter screen needs to be replaced, the fixing rod can be rotated to release the fixation, making it convenient and quick to disassemble and replace each filter screen, thus ensuring the stability and reliability of the filtration process, and making the filter screen maintenance operation simpler, more efficient and reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the multilayer filter proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the large gear section of the multilayer filter proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the feeding funnel part of the multi-layer filter proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of a portion of the limiting ring structure of the multilayer filter proposed in this utility model.

[0022] Legend:

[0023] 1. Outer shell; 2. Support frame; 3. Motor; 4. Pinion; 5. Gear; 6. Coarse filter screen; 7. Medium-coarse filter screen; 8. Fine filter screen; 9. Fixing ring one; 10. Fixing ring two; 11. Spring; 12. Positioning rod; 13. Fixing rod; 14. Positioning hole; 15. Feeding funnel. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1-3 The present invention provides an embodiment of a multi-layer filter, including a housing 1, a support frame 2 fixedly connected to the outer wall of the housing 1, and a multi-layer filter assembly provided on the inner wall of the housing 1;

[0026] The multi-layer filter assembly includes a coarse filter screen 6, a medium-coarse filter screen 7, and a fine filter screen 8. Driven by a large gear 5, they rotate, evenly dispersing the material to be filtered onto the surface, initially filtering larger particles and reducing localized accumulation. The medium-coarse filter screen 7, located below the coarse filter screen 6, performs secondary filtration on the material that has passed through the coarse filter screen 6, intercepting medium-sized particles and achieving graded filtration. The fine filter screen 8, located below the medium-coarse filter screen 7, performs fine filtration on the material after the first two stages of filtration, intercepting smaller particles and improving filtration accuracy. The coarse filter 6, the medium-coarse filter 7, and the fine filter 8 are arranged in descending order on the inner wall of the outer casing 1. A motor 3 is fixedly connected to the upper surface of the support frame 2. A small gear 4 is fixedly connected to the output end of the motor 3. A large gear 5 is rotatably connected to the upper side of the outer wall of the outer casing 1. The gear 5 rotates under the drive of the small gear 4 and then transmits power to the coarse filter 6 through a transmission structure such as a connecting shaft. The tooth ends of the small gear 4 mesh with the tooth ends of the large gear 5. There is a feeding funnel 15 on the upper side of the inner wall of the outer casing 1. Disassembly components are provided on the upper surfaces of the coarse filter 6, the medium-coarse filter 7, and the fine filter 8.

[0027] Specifically, when using a multi-layer filter, the output of motor 3 drives the small gear 4 to rotate. The small gear 4 meshes with the large gear 5, causing the large gear 5 to rotate. The large gear 5 transmits power to the coarse filter screen 6 through a transmission structure such as a connecting shaft, causing the coarse filter screen 6 to rotate synchronously. After the filter material enters through the feeding funnel 15, it first falls onto the rotating coarse filter screen 6. The rotation of the coarse filter screen 6 disperses the filter material evenly, and then it passes through the medium coarse filter screen 7 and the fine filter screen 8 in sequence to complete the graded filtration.

[0028] Reference Figures 1-4The disassembly assembly includes a first retaining ring 9, which is attached to the upper and lower surfaces of each filter screen to clamp the coarse filter screen 6, the medium-coarse filter screen 7, and the fine filter screen 8. The lower surface of the first retaining ring 9 is attached to the upper surface of the coarse filter screen 6, and a second retaining ring 10 is attached to the lower surface of the coarse filter screen 6. A positioning rod 12 is fixedly connected to the lower surface of the first retaining ring 9, and a spring 11 is fixedly connected to the inner wall of the second retaining ring 10. Positioning holes 14 are provided in the coarse filter screen 6, the second retaining ring 10, the medium-coarse filter screen 7, and the fine filter screen 8. A retaining rod 13 is threadedly connected to the inner wall of the first retaining ring 9, and the retaining rod 13 is threaded into the inner wall of the first retaining ring 9. Rotation can control the connection state between the first retaining ring 9 and the second retaining ring 10. The system allows for locking and unlocking of the filter screen for easy assembly and disassembly. A second fixing ring 10 is rotatably connected to the outer wall of the fixing rod 13, which is rotatably connected to the inner wall of the coarse filter screen 6. The outer wall of the positioning rod 12 is slidably connected to the inner wall of the positioning hole 14, and the outer wall of the positioning rod 12 is slidably connected through the inner wall of the coarse filter screen 6. A feeding funnel 15 is located on the upper side of the inner wall of the outer shell 1, above the coarse filter screen 6. A medium-coarse filter screen 7 is located below the coarse filter screen 6, and a fine filter screen 8 is located below the medium-coarse filter screen 7. The coarse filter screen 6, medium-coarse filter screen 7, and fine filter screen 8 are all located between the first fixing ring 9 and the second fixing ring 10. One end of the spring 11 is attached to the lower surface of the first fixing ring 9.

[0029] Specifically, fixing ring 9 and fixing ring 10 fix the coarse filter screen 6, the medium coarse filter screen 7, and the fine filter screen 8. The positioning rod 12 slides and is positioned in the positioning hole 14. The spring 11 provides elastic pressure to enhance the fixation. When the filter screen needs to be replaced, the fixing rod 13 is rotated to disconnect the fixing ring 9 and the fixing ring 10, and each filter screen can be disassembled and replaced.

[0030] Working principle: When a multi-layer filter is needed, the output end of motor 3 drives the small gear 4 to rotate. Since the small gear 4 meshes with the teeth of the large gear 5, the large gear 5 rotates accordingly. The power of the large gear 5 can be transmitted to the coarse filter screen 6 through transmission. For example, the large gear 5 is connected to the coarse filter screen 6 through a connecting shaft. When the large gear 5 rotates, it can drive the coarse filter screen 6 to rotate synchronously. In this way, during the rotation of the coarse filter screen 6, the material to be filtered on its surface can be more evenly dispersed, reducing local accumulation and improving filtration efficiency.

[0031] In addition, fixing ring 9 and fixing ring 10 fix the coarse filter 6, the medium coarse filter 7 and the fine filter 8. The positioning rod 12 slides in the positioning hole 14 to achieve positioning. The spring 11 provides elastic pressure to enhance the fixing effect. By rotating the fixing rod 13, the connection between fixing ring 9 and fixing ring 10 can be released, making it easy to disassemble and replace each filter screen.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multilayer filter, comprising a housing (1), characterized in that: The outer wall of the outer shell (1) is fixedly connected to a support frame (2), and the inner wall of the outer shell (1) is provided with a multi-layer filter assembly; The multi-layer filter assembly includes a coarse filter screen (6), a medium-coarse filter screen (7), and a fine filter screen (8). The coarse filter screen (6), the medium-coarse filter screen (7), and the medium-coarse filter screen (8) are arranged in descending order on the inner wall of the outer shell (1). A motor (3) is fixedly connected to the upper surface of the support frame (2). A small gear (4) is fixedly connected to the output end of the motor (3). A large gear (5) is rotatably connected to the upper side of the outer wall of the outer shell (1). The tooth end of the small gear (4) meshes with the tooth end of the large gear (5). A feeding funnel (15) is provided on the upper side of the inner wall of the outer shell (1). A disassembly assembly is provided on the upper surface of the coarse filter screen (6), the medium-coarse filter screen (7), and the fine filter screen (8).

2. The multilayer filter according to claim 1, characterized in that: The disassembly assembly includes a first fixing ring (9), the lower surface of which is attached to the upper surface of the coarse filter screen (6), a second fixing ring (10) attached to the lower surface of the coarse filter screen (6), a positioning rod (12) fixedly connected to the lower surface of the first fixing ring (9), a spring (11) fixedly connected to the inner wall of the second fixing ring (10), and positioning holes (14) provided in the coarse filter screen (6), the second fixing ring (10), the medium coarse filter screen (7) and the fine filter screen (8), and a fixing rod (13) threadedly connected to the inner wall of the first fixing ring (9).

3. The multilayer filter according to claim 2, characterized in that: The outer wall of the fixed rod (13) is rotatably connected to a second fixed ring (10), and the outer wall of the fixed rod (13) is rotatably connected to the inner wall of the filter coarse screen (6).

4. The multilayer filter according to claim 2, characterized in that: The outer wall of the positioning rod (12) is slidably connected to the inner wall of the positioning hole (14), and the outer wall of the positioning rod (12) is slidably connected to the inner wall of the filter coarse screen (6).

5. The multilayer filter according to claim 1, characterized in that: The feeding funnel (15) is located on the upper side of the inner wall of the outer shell (1), and the feeding funnel (15) is located above the filter coarse screen (6).

6. The multilayer filter according to claim 1, characterized in that: The coarse filter (7) is located below the coarse filter (6), and the fine filter (8) is located below the coarse filter (7).

7. The multilayer filter according to claim 1, characterized in that: The coarse filter (6), medium coarse filter (7), and fine filter (8) are all arranged between the first fixed ring (9) and the second fixed ring (10).

8. The multilayer filter according to claim 2, characterized in that: One end of the spring (11) is attached to the lower surface of the fixing ring (9).

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