Scraper for filter

Abstract

The scraper for the filter comprises a scraper rest, a rotating shaft and blades, the upper side and the lower side of the rotating shaft are respectively connected with the scraper rest in a rotating mode, the rotating shaft is fixed with the multiple blades, the blades on the upper side and the lower side are in mirror symmetry, and the blades form a first cutting edge face. The scraper provided by the utility model is not integral but consists of a plurality of blades which are linearly arranged, and a single blade can rotate when encountering impurities, so that the bending deformation of the blades is avoided, and the service life of the blades is prolonged; when the blades in one row are damaged, only the damaged blades need to be replaced, and all the blades do not need to be replaced, so that the use cost of the blades is reduced; the rotating shaft rotates relative to the knife rest, so that the blades can rotate to be attached to the filter screen, and the scraping effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of filter scrapers, in particular to a scraper for filters. Background Art

[0002] In the context of the waste plastic machinery industry, in the existing process of using filters for granulation, waste plastics are squeezed into the filter to filter impurities. A filter screen is set in the filter, and the scraper moves up and down to scrape off the impurities attached to the filter screen. The current scraper is a whole blade. When the entire blade contacts impurities that are difficult to scrape off locally, it will be blocked by the impurities, causing the blade to bend and deform locally, which in turn causes damage to the blade and affects the life of the scraper. If the blade is partially damaged, the entire blade needs to be replaced, which increases the cost of use.

[0003] Moreover, the scraper is fixed to the blade holder, resulting in a gap between the scraper and the filter screen after wear, making it impossible for the scraper to scrape off impurities on the filter screen. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a scraper and a tray for a filter to solve the above problems.

[0005] A scraper for a filter comprises a blade holder, a rotating shaft and a blade. The upper and lower sides of the blade holder are rotatably connected to the rotating shaft respectively. The rotating shaft is fixed to a plurality of blades. The blades on the upper and lower sides are mirror-symmetrical. The blades are formed with a first cutting edge surface.

[0006] Preferably, cylindrical grooves are formed on the upper and lower sides of the tool holder respectively, the rotating shaft is embedded in the cylindrical groove, and the side surface of the rotating shaft is in contact with the inner wall of the cylindrical groove.

[0007] Preferably, the rotating shaft is radially formed with a plurality of insertion portions, the blades are inserted into the insertion portions, and the insertion portions are arranged in a straight line along the axis of the rotating shaft.

[0008] Preferably, it also includes a bolt, the shaft is radially formed with a second fixing hole, the second fixing hole is connected to the insertion portion, the blade is formed with a third fixing hole in the thickness direction, and the bolt passes through the third fixing hole and is threadedly connected with the second fixing hole.

[0009] Preferably, the insertion portion is a through hole or a slot.

[0010] Preferably, the blade is formed with a second cutting edge surface, the width of the second cutting edge surface is smaller than the width of the first cutting edge surface, and the second cutting edge surface intersects with the first cutting edge surface.

[0011] Preferably, a first fixing hole in the up-down direction is formed in the middle of the tool holder, and a sliding hole in the up-down direction is formed on the tool holder.

[0012] Preferably, the tool holder is formed with a first through hole in the up-down direction, and the tool holder is formed with through grooves penetrating up-down on the front and rear sides.

[0013] Preferably, it also includes a limit plate, and the front and rear ends of the rotating shaft are respectively fitted with the limit plates, and the limit plate is fixedly and detachably connected to the tool holder.

[0014] Preferably, the upper and lower sides of the left and right side surfaces of the tool holder are rotatably connected to the rotating shaft respectively.

[0015] The utility model has the following advantages:

[0016] 1. The scraper is not a whole but consists of multiple blades arranged in a straight line. When a single blade encounters impurities, it can rotate individually to avoid bending and deformation of the blade, thereby increasing the service life of the blade;

[0017] 2. When a row of multiple blades is damaged, only the damaged blade needs to be replaced instead of all the blades, which reduces the cost of blade use;

[0018] 3. The shaft rotates relative to the blade holder, so that the blade can rotate to fit the filter screen to ensure the scraping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only one embodiment of the utility model. For ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] Figure 1 : A schematic diagram of the three-dimensional structure of the utility model (part of the blade and the rotating shaft are not shown);

[0021] Figure 2 : A schematic diagram of the structure of the utility model from top view (part of the blade and the rotating shaft are not shown);

[0022] Figure 3 : Figure 2 A schematic cross-sectional view of the structure at AA in the middle (part of the blade and the rotating shaft are not shown);

[0023] Figure 4 : The second schematic diagram of the three-dimensional structure of the utility model (part of the blade and the rotating shaft are not shown). DETAILED DESCRIPTION

[0024] The utility model is further described below with reference to the accompanying drawings and examples:

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] like Figures 1 to 4 As shown, this embodiment provides a scraper for a filter, comprising: a tool holder 1, a rotating shaft 2 and a blade 3, wherein the tool holder 1 is rotatably connected to the rotating shaft 2 on the upper and lower sides respectively, the rotating shaft 2 is fixed to a plurality of blades 3, the blades 3 on the upper and lower sides are mirror-symmetrical along a horizontal plane, and the blades 3 are formed with a first cutting edge surface 32.

[0029] Preferably, the tool holder 1 is formed with cylindrical grooves 10 on both sides, the shaft 2 is embedded in the cylindrical grooves 10, and the side of the shaft 2 is in contact with the inner wall of the cylindrical groove 10. The corresponding angle of the arc surface of the inner wall of the cylindrical groove 10 is greater than 180 degrees, so as to prevent the shaft 2 from being separated from the cylindrical groove 10.

[0030] Preferably, a limit plate 15 is further included, and the front and rear ends of the rotating shaft 2 are respectively fitted with the limit plates 15, and the limit plates 15 are fixedly and detachably connected to the tool holder 1. During installation, one limit plate 15 is removed, and then the rotating shaft 2 is axially inserted into the cylindrical groove 10, and finally a screw is used to pass through the limit plate 15 and threadedly connected to the tool holder 1, and the limit plate 15 is fitted with the end surface of the rotating shaft 2 to limit the rotating shaft 2.

[0031] Preferably, the rotating shaft 2 is radially formed with a plurality of inserting portions 21 , the blades 3 are inserted into the inserting portions 21 , the inserting portions 21 are evenly arranged in a straight line along the axis of the rotating shaft 2 , and adjacent blades 3 are in contact with each other.

[0032] Preferably, the insertion portion 21 is a through hole or a slot.

[0033] Preferably, it also includes a bolt, the shaft 2 is radially formed with a second fixing hole 22, the second fixing hole 22 is connected to the insertion portion 21, the blade 3 is formed with a third fixing hole 31 in the thickness direction, and the bolt passes through the third fixing hole 31 and is threadedly connected with the second fixing hole 22.

[0034] Preferably, the blade 3 is formed with a second blade surface 33 , the width of the second blade surface 33 is smaller than the width of the first blade surface 32 , and the second blade surface 33 intersects with the first blade surface 32 .

[0035] Preferably, a first fixing hole 11 is formed in the middle of the tool holder 1 in the up-down direction, and a sliding hole 12 is formed in the up-down direction. When in use, the first fixing hole 11 is fixed to the piston rod of the cylinder, and the guide column passes through the sliding hole 12.

[0036] Preferably, the tool holder 1 is formed with a first through hole 13 in the up-and-down direction, and the tool holder 1 is formed with a through groove 14 that passes through from top to bottom on the front and rear sides. The first through hole 13 and the through groove 14 reduce the material used in the tool holder 1 and allow the liquid in the filter to pass through, thereby reducing the resistance during up-and-down movement.

[0037] Preferably, the upper and lower sides of the left and right side surfaces of the tool holder 1 are rotatably connected to the rotating shaft 2 respectively, so that impurities attached to the filter screens on the left and right sides can be scraped off simultaneously.

[0038] When working, the upper and lower blades 3 are in contact with the filter screen, and the cylinder drives the knife holder 1 to move up and down. When the knife holder 1 moves upward, the scraped impurities leave the filter screen from the second blade surface 33 of the upper blade 3; when the knife holder moves downward, the scraped impurities leave the filter screen from the second blade surface 33 of the lower blade 3.

[0039] The rotating shaft 2 rotates relative to the blade holder 1, so that the blade 3 can keep in contact with the filter. It should be noted that the rotation range of the blade 3 below and below is limited by the cylindrical groove 10, so that the blade 3 will not be rotated by gravity and lose contact with the filter.

[0040] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A scraper for a filter, characterized in that: include: A tool holder (1), a rotating shaft (2) and a blade (3), wherein the tool holder (1) is rotatably connected to the rotating shaft (2) at the upper and lower sides respectively, the rotating shaft (2) is fixed to a plurality of blades (3), the blades (3) at the upper and lower sides are mirror-symmetrical, and the blades (3) are formed with a first blade surface (32).

2. A filter scraper according to claim 1, characterized in that: The tool holder (1) is formed with cylindrical grooves (10) on the upper and lower sides respectively, the rotating shaft (2) is embedded in the cylindrical groove (10), and the side surface of the rotating shaft (2) is in contact with the inner wall of the cylindrical groove (10).

3. A filter scraper according to claim 1, characterized in that: The rotating shaft (2) is radially formed with a plurality of insertion portions (21), the blades (3) being inserted into the insertion portions (21), and the insertion portions (21) being arranged in a straight line along the axis of the rotating shaft (2).

4. A filter scraper according to claim 3, characterized in that: The invention also comprises a bolt, wherein the rotating shaft (2) is radially formed with a second fixing hole (22), the second fixing hole (22) is communicated with the insertion portion (21), the blade (3) is formed with a third fixing hole (31) in the thickness direction, and the bolt passes through the third fixing hole (31) and is threadedly connected with the second fixing hole (22).

5. A filter scraper according to claim 3, characterized in that: The insertion portion (21) is a through hole or a groove.

6. A filter scraper according to claim 1, characterized in that: The blade (3) is formed with a second blade surface (33), the width of the second blade surface (33) is smaller than the width of the first blade surface (32), and the second blade surface (33) intersects with the first blade surface (32).

7. A filter scraper according to claim 1, characterized in that: A first fixing hole (11) is formed in the middle of the tool holder (1) in the up-down direction, and a sliding hole (12) is formed in the up-down direction.

8. A filter scraper according to claim 1, characterized in that: The tool holder (1) is formed with a first through hole (13) in the up-down direction, and the tool holder (1) is formed with through grooves (14) that penetrate up-down on both the front and rear sides.

9. A filter scraper according to claim 1, characterized in that: It also includes a limit plate (15), with the front and rear ends of the rotating shaft (2) respectively fitting on the limit plate (15), and the limit plate (15) is fixedly and detachably connected to the tool holder (1).

10. The filter scraper according to claim 1, characterized in that: The upper and lower sides of the left and right side surfaces of the tool holder (1) are respectively rotatably connected to the rotating shaft (2).

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