Filter capable of automatically cleaning impurities

Abstract

The utility model discloses a filter capable of automatically cleaning impurities, which comprises a tank body, a filter screen, a back flushing mechanism and a driving mechanism, and the inner space of the tank body is divided into a filter space and an impurity storage space; the filter screen is mounted in the filter space; the back-flushing mechanism comprises a shell and a back-flushing medium supply assembly, the shell is arranged on the two faces of the filter screen in a clamped mode, the output end of the back-flushing medium supply assembly is connected with the shell, and a back-flushing medium is supplied in the shell to conduct back-flushing on the filter screen; the movable end of the driving mechanism is connected with the back-flushing mechanism and drives the back-flushing mechanism to move, so that the back-flushing mechanism has a first position state on the filter screen and a second position state on the impurity storage space. Local areas of the filter screen are wrapped and clamped through the back-flushing mechanism, the normal liquid fertilizer filtering process is not interrupted, impurities of the filter screen are cleaned through back-flushing, the position of the filter screen is moved in cooperation with the driving mechanism, and back-flushing is carried out on other areas of the filter screen.

Description

Technical Field

[0001] This utility model relates to the field of foliar fertilizer production technology, specifically to a filter that can clean impurities. Background Technology

[0002] Foliar fertilizer is a type of fertilizer that is directly absorbed through the surface of leaves. It is usually in liquid form and is a subcategory of liquid fertilizers. Foliar fertilizers are mainly used to supplement the various nutrients required for plant growth, especially when certain nutrients in the soil are insufficient, or to quickly correct nutrient deficiency symptoms in crops. Foliar fertilizers act directly on plant leaves, utilizing the direct absorption of nutrients by the leaves to improve fertilization efficiency, especially during critical growth stages. In the preparation of foliar fertilizers, the raw materials may contain insoluble particles or impurities. If these substances are not removed by filtration, they may clog nozzles or other equipment components during spraying, affecting the fertilization effect. Therefore, the filtration unit is an important component in the preparation of foliar fertilizers. For example, Chinese Patent 202320297893.5 discloses a filtration device for liquid fertilizer production, including a filter tank with a horizontally arranged filter screen inside. The filter screen is rotated around the horizontal line by a drive component.

[0003] The existing technology has the following drawbacks: the filter screen backwash slag discharge channel and the liquid fertilizer discharge channel are the same channel. Not only does the filtration need to be interrupted during backwash cleaning, but impurities are also easily left in the discharge channel. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a self-cleaning impurity filter to solve the technical problem that in the prior art, the filter screen backwash slag discharge channel and the discharge channel after liquid fertilizer filtration are the same channel, which not only requires interruption of filtration during backwash cleaning, but also easily leaves residual impurities in the discharge channel.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a self-cleaning filter, comprising:

[0007] The tank body, the internal space of which is divided into a filtration space and an impurity storage space;

[0008] A filter screen, which is installed within the filtration space;

[0009] A backwash mechanism includes a housing and a backwash medium supply assembly. The housing is sandwiched between two sides of the filter screen. The output end of the backwash medium supply assembly is connected to the housing, supplying backwash medium within the housing to backwash the filter screen.

[0010] A drive mechanism, the movable end of which is connected to the backwash mechanism, drives the backwash mechanism to move, so that the backwash mechanism has a first position state located on the filter screen and a second position state located on the impurity storage space.

[0011] In some embodiments, the filter screen is installed at an angle inside the tank, and the impurity trough is arranged between the angled top side of the filter screen and the inner wall of the tank.

[0012] In some embodiments, the tank body is provided with a baffle at the same tilt angle as the filter screen, and the filter screen is mounted on the baffle.

[0013] In some embodiments, the drive mechanism includes a drive motor mounted on the tank body, and its output shaft is connected to the recoil mechanism.

[0014] In some embodiments, the housing includes an upper housing and a lower housing, the upper housing is connected to the lower housing, the top of the upper housing has an opening, a sealing ring is provided between the opposite sides of the upper housing and the lower housing to abut against the surface of the filter screen, and the output end of the backwash medium supply assembly is connected to the lower housing.

[0015] In some embodiments, the backflushing medium supply assembly includes a compressed air tank and a control valve, the control valve being mounted on the compressed air tank and connected to the lower housing via a pipe.

[0016] In some embodiments, the backflushing medium supply assembly includes a water storage tank and a pump body, one end of the pump body being connected to the water storage tank and the other end being connected to the lower housing via a pipe.

[0017] In some embodiments, a cleaning blade is provided on the outer side of the upper housing.

[0018] In some embodiments, the top and bottom of the tank are respectively provided with an inlet and a outlet aligned with the filter screen.

[0019] In some embodiments, the tank body is provided with a slag removal port on the side corresponding to the impurity storage space, and a door panel is hinged inside the slag removal port.

[0020] Compared with the prior art, the self-cleaning impurity filter provided by this utility model uses a backwashing mechanism to clamp a local area of ​​the filter screen without interrupting the normal liquid fertilizer filtration process and backwashing the impurities on the filter screen. In addition, the drive mechanism moves the filter screen to backwash other areas of the filter screen, which also scrapes and pushes the impurities on the surface of the filter screen and guides the impurities into the impurity tank. The impurities are not discharged through the discharge channel, thus avoiding the presence of residual impurities in the discharge channel. Attached Figure Description

[0021] Figure 1 This is a three-dimensional view of the self-cleaning impurity filter provided in an embodiment of this utility model;

[0022] Figure 2 This is a three-dimensional exploded view of the self-cleaning impurity filter provided in this embodiment of the utility model;

[0023] Figure 3 This is a front view of the self-cleaning impurity filter provided in this embodiment of the present invention, using liquid backflushing;

[0024] Figure 4 This is a front sectional view of the self-cleaning impurity filter provided in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of a self-cleaning impurity filter using an arc-shaped filter screen provided in an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Tank body; 101. Impurity trough; 102. Semi-circular baffle; 103. Feed inlet; 104. Discharge outlet; 105. Slag removal outlet; 106. Door panel;

[0028] 2. Filter screen;

[0029] 3. Backflush mechanism; 31. Housing; 311. Upper housing; 3111. Opening; 312. Lower housing; 313. Cleaning blade; 32. Backflush medium supply assembly; 321. Compressed air tank; 322. Control valve; 323. Water storage tank; 324. Pump body;

[0030] 4. Drive mechanism; 41. Drive motor. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] To address the technical problem that the backwash slag discharge channel and the liquid fertilizer filtration discharge channel are the same, which not only requires interrupting the filtration during backwash cleaning but also easily leaves residual impurities in the discharge channel, this utility model provides a self-cleaning impurity filter. This filter can separate the backwash slag discharge channel and the liquid fertilizer filtration discharge channel, eliminating the need to deliberately interrupt the filtration during backwash cleaning and preventing residual impurities in the discharge channel.

[0033] It should be noted that the self-cleaning impurity filter described in this utility model is used in, but not limited to, the field of liquid fertilizer production. For ease of explanation, this utility model only uses the application of the self-cleaning impurity filter in the field of liquid fertilizer production as an example. The principle of the self-cleaning impurity filter applied to other fields is essentially the same as that applied to the field of liquid fertilizer production, and will not be elaborated here.

[0034] Please see Figure 1 and Figure 2 This utility model provides a self-cleaning impurity filter, which includes a tank 1, a filter screen 2, a backwashing mechanism 3, and a driving mechanism 4. The filter screen 2 is installed inside the tank 1, and an impurity groove 101 is formed between the filter screen 2 and the inner wall of the tank 1. That is, inside the tank 1, the internal space is divided into a filtration space and an impurity storage space. The filter screen 2 is installed in the filtration space, and the impurity groove 101 is the impurity storage space. The other side is the filtration space, which has a liquid fertilizer filtration channel for the filter screen 2 to flow from top to bottom, and an impurity discharge channel located next to the filter screen 2. The backwashing mechanism 3 includes a housing 31 and a backwashing medium supply assembly 32. The housing 31 is sandwiched between the two sides of the filter screen 2, forming a space separated from the filtration channel. The housing 31 can be strip-shaped, only wrapping a part of the filter screen 2. The filter screen 2 area is wrapped inside the housing 31, and then the backwashing medium is used to discharge the impurities. The output end of the material supply component 32 is connected to the housing 31, supplying backwash medium to backwash the filter screen 2 within the housing 31. This allows for the backwashing and cleaning of impurities in a specific area of ​​the filter screen 2 without affecting its normal filtration function (excluding the portion blocked by the housing 31). The movable end of the drive mechanism 4 is connected to the backwash mechanism 3, driving the backwash mechanism 3 to move. The backwash mechanism 3 is positioned in a first position on the filter screen 2 and in a second position on the impurity storage space. The movement of the backwash mechanism 3 by the drive mechanism 4 has two main functions: first, to sweep the entire surface of the filter screen 2, cleaning the accumulated impurities on the surface of the filter screen 2 and pushing them into the impurity trough 101 on the side; second, to gradually backwash each position during the sweeping process of the filter screen 2, completing the backwashing action of the entire filter screen 2.

[0035] Understandably, with the backwash mechanism 3 performing deep backwashing and cleaning of the filter screen 2 in a localized area, and in conjunction with the movement of its position by the drive mechanism 4, the surface of the filter screen 2 can also be cleaned without interrupting the normal liquid fertilizer filtration process. The impurity channel and the fertilizer filtration channel are two separate channels to prevent impurities from contaminating the liquid fertilizer inlet channel.

[0036] In this embodiment, please refer to Figure 1 and Figure 2 In order to concentrate the injection of liquid fertilizer into the filter screen 2, the top and bottom of the tank body 1 are respectively provided with an inlet 103 and a discharge port 104 aligned with the filter screen 2, thereby reducing the probability of the liquid fertilizer splashing into the impurity tank 101 during the filtration process.

[0037] For further details, please refer to Figure 4 In order to facilitate the discharge of impurities accumulated in the impurity tank 101, a slag cleaning port 105 is provided on the side of the tank body 1 corresponding to the impurity storage space. A door panel 106 is hinged inside the slag cleaning port 105. By opening the door panel 106, the accumulated impurities in the impurity tank 101 can be cleaned through the slag cleaning port 105.

[0038] Understandably, the door panel 106 may not be installed inside the slag cleaning port 105, and impurities and dirt may be directly discharged; alternatively, a receiving bucket may be directly installed at the slag cleaning port 105 to collect impurities.

[0039] In one embodiment, please refer to Figure 2 and Figure 4 In order to prevent liquid from flowing directly into the impurity tank 101 when the filtration speed is slow and liquid stagnation occurs above the filter screen, the filter screen 2 is installed at an angle inside the tank body 1, and the impurity tank 101 is arranged between the inclined top side of the filter screen 2 and the inner wall of the tank body 1, thereby forming a tank between the filter screen 2 and the tank body 1 that can accommodate the stagnant liquid, preventing liquid from flowing directly from the filter screen 2 area into the impurity tank 101.

[0040] Furthermore, to prevent overflow, an overflow hole can be opened at a relatively high point of the tank containing the stagnant liquid, and an external storage tank can be connected to it.

[0041] In one embodiment, please refer to Figure 2 In order to form a sweeping coverage of the filter screen 2 by the backwash mechanism 3, the tank 1 is provided with a partition 102 with the same tilt angle as the filter screen 2. The filter screen 2 is installed on the partition 102, that is, the area of ​​the filter screen 2 is smaller than the area of ​​the partition 102, and it is located in an area that can be completely covered by a semi-circular sweep.

[0042] Furthermore, in order to drive the covering sweeping of the filter screen 2 surface, the driving mechanism 4 includes a driving motor 41, which is mounted on the tank 1 and its output shaft is connected to the backwash mechanism 3. The driving motor 41 drives the backwash mechanism 3 to rotate, and the semi-circular area of ​​its rotation radius covers the filter screen 2.

[0043] Understandably, during the rotation process, the backwash mechanism 3 can alternate between forward and reverse drive. Under the rotation drive of the drive motor 41, the two sides of the backwash mechanism 3 clean the surface impurities of the filter screen 2 respectively, and push the impurities into the impurity tank 101 when rotating and passing over the top of the partition plate 102 to the impurity tank 101.

[0044] It should be noted that the shape of the partition 102 and the filter screen 2 is not limited here. The effect can be achieved as long as the backflushing mechanism 3 can sweep the entire filter screen 2 during rotation. However, the shape of the inner cavity of the tank 1 is matched with the sweeping radius of the backflushing mechanism 3 in the top view projection. One side of the filter screen 2 is a semi-cylindrical shape, so that the impurities remaining on that side can be reduced when the backflushing mechanism 3 cleans.

[0045] In one embodiment, please refer to Figure 2 and Figure 4 To clamp onto the filter screen 2 and create a backflow, the housing 31 includes an upper housing 311 and a lower housing 312. The upper housing 311 is connected to the lower housing 312, and the upper housing 311 and lower housing 312 are respectively attached to both sides of the filter screen 2. One end of the upper housing 311 extending outside the filter screen 2 is connected to one end of the lower housing 312 extending outside the filter screen 2, and is connected to the output end of the drive mechanism 4. The top of the upper housing 311 has an opening 3111. A sealing ring that abuts against the surface of the filter screen 2 is provided between the opposite sides of the upper housing 311 and the lower housing 312. The upper housing 311 and the lower housing 312 form a compartment in their overlapping area. The backwash medium supply component 32 is connected to the compartment on the lower housing 312 through its output end, and backwash medium is introduced into the compartment. The backwash medium is introduced into the lower housing 312 and then passes through the mesh of the filter screen 2 from bottom to top through the closed lower housing 312 to form backwash and enter the interior of the upper housing 311. The outer periphery of the upper housing 311 is closed, and the upper opening 3111 serves as the medium outlet. The medium outlet extends above the impurity tank 101. Therefore, the impurities brought out by the backwash are also directly introduced into the impurity tank 101.

[0046] Specifically, the upper housing 311 is a housing with an opening at the bottom that communicates with the surface of the filter screen 2, and the lower housing 312 is a housing with an opening at the top that communicates with the surface of the filter screen 2. The opening 3111 at the end of the upper housing 311 near the impurity tank 101 is a media outlet. The backwash medium is introduced into the cavity inside the lower housing 312, passes through the filter screen 2 from the opening to form a backwash, enters the cavity inside the upper housing 311, and is discharged from the opening 3111, forming a backwash. The backwash medium and the impurities carried out are then introduced into the impurity tank 101.

[0047] In this embodiment, in order to enhance the cleaning effect on the surface of the filter screen 2 during rotation, a cleaning scraper 313 is provided on the outer side of the upper housing 311.

[0048] In an optional embodiment, for backflush using gas, please refer to [link to relevant documentation]. Figure 2 The backflush medium supply assembly 32 includes a compressed gas tank 321 and a control valve 322. The control valve 322 is installed on the compressed gas tank 321 and connected to the lower housing 312 through a pipeline. Compressed gas can be introduced into the lower housing 312 through the control valve 322, thereby forming gas backflush.

[0049] In another alternative embodiment, for backflushing using liquid, please refer to [link to relevant documentation]. Figure 3 The backwash medium supply assembly 32 includes a water storage tank 323 and a pump body 324. One end of the pump body 324 is connected to the water storage tank 323, and the other end is connected to the lower housing 312 through a pipe. By starting the pump body 324, liquid is drawn from the water storage tank 323, pressurized and transported to the lower housing 312, thereby forming liquid backwash.

[0050] It is understandable that whether gas or liquid is used as the backwash medium, the purpose of backwashing and cleaning the deep impurities in the mesh of filter screen 2 can be achieved. The medium flow channel is composed of the lower shell 312, the mesh of filter screen 2, the upper shell 311 and the opening 3111, and finally leads to the impurity tank 101.

[0051] In another embodiment, filter 2 is not limited to a flat filter, nor is it limited to an inclined arrangement; please refer to [reference needed]. Figure 5 The filter screen 2 is an arc-shaped filter screen, and the backwash mechanism 3 moves back and forth along the surface of the filter screen through the drive mechanism 4. Both sides of the filter screen 2 have an impurity groove 101, and the impurities are pushed to both sides for discharge. For backwash impurities, a soft conduit connected to the upper housing 311 can be used to extend to the impurity groove 101 for guidance, which can also achieve the purpose of self-cleaning impurities.

[0052] To better understand this utility model, the following is combined with... Figures 1 to 4The technical solution of this utility model is described in detail as follows: Liquid fertilizer is introduced through the feed inlet 103 and filtered through the filter screen 2 to remove impurities. The impurities are retained on the top of the filter screen 2, while the liquid fertilizer is discharged from the discharge outlet 104. During the filtration process, the drive motor 41 is started to drive the housing 31 to rotate. During the rotation, the cleaning scraper blades 313 on both sides of the upper housing 311 clean the impurities retained on the surface of the filter screen 2 and rotate and clean them into the impurity tank 101 on the side. During the cleaning process, the control valve 322 is opened to introduce compressed gas from the compressed gas tank 321 to backflush the impurities in the mesh of the filter screen 2. When the filter screen moves to the top of the impurity tank 101, the control valve 322 is closed to stop the introduction of backflushing medium.

[0053] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A self-cleaning impurity filter, characterized by, The utility model relates to a filter tank, comprising: a tank body, the inside space of which is divided into a filtering space and a impurity storage space; a filter screen installed in the filtering space; a backflushing mechanism comprising a casing and a backflushing medium supply assembly, the casing being sandwiched on both sides of the filter screen, the output end of the backflushing medium supply assembly being connected with the casing to supply backflushing medium to backflush the filter screen in the casing; and a driving mechanism, the active end of which is connected with the backflushing mechanism to drive the backflushing mechanism to move, so that the backflushing mechanism has a first position state on the filter screen and a second position state on the impurity storage space.

2. The self-cleaning contaminant filter of claim 1, wherein, The filter screen is installed obliquely in the filtering space.

3. The self-cleaning impurity filter according to claim 2, wherein, The tank body is provided with a partition plate with the same oblique angle as the filter screen, and the filter screen is installed on the partition plate.

4. The self-cleaning contaminant filter of claim 1, wherein, The driving mechanism comprises a driving motor, the output shaft of which is connected with the backflushing mechanism.

5. The self-cleaning contaminant filter of claim 1, wherein, The casing comprises an upper casing and a lower casing, the upper casing being connected with the lower casing, the top end of the upper casing being open, and the upper casing and the lower casing being provided with sealing rings on the opposite sides thereof to abut against the surface of the filter screen, and the output end of the backflushing medium supply assembly being connected with the lower casing.

6. The self-cleaning contaminant filter of claim 5, wherein, The backflushing medium supply assembly comprises a compressed gas tank and a control valve, the control valve being installed on the compressed gas tank and connected with the lower casing through a pipeline.

7. The self-cleaning contaminant filter of claim 5, wherein, The backflushing medium supply assembly comprises a water storage tank and a pump body, one end of the pump body being connected with the water storage tank and the other end being connected with the lower casing through a pipeline.

8. The self-cleaning contaminant filter of claim 5, wherein, The outer side of the upper casing is provided with a cleaning blade.

9. The self-cleaning contaminant filter of claim 1, wherein, The top and bottom of the tank body are respectively provided with a feeding port and a discharging port aligned with the filter screen.

10. The self-cleaning contaminant filter of claim 1, wherein, The side of the tank body corresponding to the impurity storage space is provided with a slag removal port, and the slag removal port is hingedly provided with a door plate.

Images