Papermaking wastewater filtering device

Abstract

The utility model relates to the technical field of self-cleaning filters, and discloses a papermaking wastewater filtering device which comprises a filter main body, an upper positioning ring is fixedly connected to the inner wall of the upper end of the filter main body, a lower positioning ring is fixedly connected to the inner wall of the lower end of the filter main body, and a plurality of positioning grooves distributed at equal intervals are formed in the inner side of the upper positioning ring; a plurality of anti-falling grooves distributed at equal intervals are formed in the upper end of the inner side of the lower positioning ring, the number of the anti-falling grooves is matched with that of the positioning grooves, and a filter screen is slidably connected into the filter body. According to the papermaking wastewater filtering device, when a filter screen is mounted, only an anti-falling block is aligned with a positioning groove, then the filter screen is placed downwards, the anti-falling block is inserted into an anti-falling groove, then the filter screen is rotated, and the anti-falling block and the positioning groove are staggered, so that the filter screen is prevented from automatically moving upwards, and when the filter screen needs to be dismounted, only the filter screen needs to be rotated, and the filter screen can be dismounted. And then the filter screen can be pulled out, so that the structure is relatively simple and is not easy to damage.

Description

Technical Field

[0001] The utility model relates to the technical field of self-cleaning filters, in particular to a papermaking wastewater filtering device. Background Art

[0002] In the papermaking industry, wastewater usually contains a large amount of suspended matter, such as fibers, fillers, coating particles, etc. If these substances are discharged directly without effective treatment, they will cause serious pollution to the environment. Since self-cleaning filters can effectively remove these suspended matter and ensure that the wastewater meets the discharge standards or can be reused, self-cleaning filters are currently often used to filter papermaking wastewater.

[0003] For example, the prior art patent, patent authorization announcement number CN212975499U, discloses a self-cleaning filter, including a cylinder, a water inlet, a water outlet, a filter screen, a motor, a stainless steel brush, and a drain valve. The filter also includes at least one annular magnet, a placement chamber, a partition plate, and a top cover. The annular magnet is located in the placement chamber, the partition plate is fixed to the bottom side of the placement chamber, and the second limit plate is fixed to the bottom surface of the top cover. The upper and lower ends of the annular magnet respectively contact the partition plate and the second limit plate. The filter can absorb iron filings through the annular magnet to prevent iron filings from entering the filter screen.

[0004] Although the self-cleaning filter in the above patent can absorb iron chips through the annular magnet to prevent iron chips from entering the filter screen, it still has certain defects:

[0005] At present, the filter screen of the self-cleaning filter is mostly fixed inside the self-cleaning filter by bolts. However, since papermaking wastewater usually contains a variety of chemical substances (such as acids, alkalis and other corrosive substances), the bolts will be corroded if they are in the papermaking wastewater for a long time, resulting in a decrease in the strength of the bolts. In addition, solid particles and sediments in the wastewater will form deposits on the surface of the bolts, affecting the connection performance and service life of the bolts. Therefore, the current installation and fixing structure of the filter screen of the self-cleaning filter needs to be improved. Utility Model Content

[0006] In view of the deficiencies of the prior art, the present invention provides a papermaking wastewater filtering device to solve the problems raised in the background art, making the structure for fixing the filter screen in the filter body simpler and less prone to damage.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a papermaking wastewater filtering device, comprising a filter body, an upper positioning ring fixedly connected to the inner wall of the upper end of the filter body, a lower positioning ring fixedly connected to the inner wall of the lower end of the filter body, a plurality of equally distributed positioning grooves are provided on the inner side of the upper positioning ring, a plurality of equally distributed anti-slip grooves are provided on the upper end of the inner side of the lower positioning ring, and the number of the anti-slip grooves matches the number of the positioning grooves, a filter screen is slidably connected to the inside of the filter body, an upper connecting ring is fixedly connected to the top of the filter screen, a lower connecting ring is fixedly connected to the bottom of the filter screen, an anti-slip block is fixedly connected to the outer wall of the lower connecting ring, the anti-slip block matches the anti-slip groove, and a top plate is installed on the top of the upper connecting ring.

[0008] Furthermore, a positioning block is fixedly connected to the bottom of the top plate, the positioning block matches the positioning groove, and a positioning cylinder is fixedly connected to the top of the upper connecting ring in a sliding connection with the top plate.

[0009] Furthermore, the top of the top plate is fixedly connected to an outer sleeve that matches the positioning sleeve, and a pull-down elastic member is provided inside the positioning sleeve. The lower end of the pull-down elastic member is fixedly connected to the upper connecting ring, and the upper end of the pull-down elastic member is fixedly connected to the outer sleeve.

[0010] Furthermore, lifting handles are fixedly connected to both sides of the top of the top plate.

[0011] Furthermore, rotating handles are fixedly connected to both sides of the interior of the upper connecting ring.

[0012] Furthermore, the lifting handle and the rotating handle are both U-shaped.

[0013] Furthermore, the anti-slip groove is L-shaped.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] When installing the filter screen of this papermaking wastewater filtering device, it is only necessary to align the anti-slip block with the positioning groove first, then place the filter screen downward so that the anti-slip block is inserted into the anti-slip groove, and then rotate the filter screen so that the anti-slip block and the positioning groove are staggered, thereby preventing the filter screen from moving upward by itself. When the filter screen needs to be removed, it is only necessary to rotate the filter screen so that the anti-slip block is aligned with the positioning groove, and then the filter screen can be pulled out. Compared with bolts, the above structure is simpler and less prone to damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a partial cross-sectional view of the utility model as a whole;

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the local enlarged structure at A in the middle;

[0019] Figure 4 It is a partial cross-sectional view of the filter body of the utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure between the filter screen and the top plate of the utility model.

[0021] In the figure: 1. Filter body; 2. Upper positioning ring; 3. Lower positioning ring; 4. Positioning groove; 5. Anti-slip groove; 6. Filter screen; 7. Upper connecting ring; 8. Lower connecting ring; 9. Anti-slip block; 10. Rotating handle; 11. Positioning cylinder; 12. Pull-down elastic member; 13. Outer sleeve; 14. Top plate; 15. Lifting handle; 16. Positioning block. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-5 A papermaking wastewater filtering device includes a filter body 1, an upper positioning ring 2 is fixedly connected to the inner wall of the upper end of the filter body 1, and a lower positioning ring 3 is fixedly connected to the inner wall of the lower end of the filter body 1. A plurality of equally distributed positioning grooves 4 are opened on the inner side of the upper positioning ring 2, and a plurality of equally distributed anti-slip grooves 5 are opened on the upper end of the inner side of the lower positioning ring 3. The number of anti-slip grooves 5 matches the number of positioning grooves 4. A filter screen 6 is slidably connected to the inside of the filter body 1, and an upper connecting ring 7 is fixedly connected to the top of the filter screen 6. A lower connecting ring 8 is fixedly connected to the bottom of the filter screen 6. An anti-slip block 9 is fixedly connected to the outer wall of the lower connecting ring 8. The anti-slip block 9 matches the anti-slip groove 5, and a top plate 14 is installed on the top of the upper connecting ring 7.

[0024] The papermaking wastewater filtering device in the present invention, when installing the filter screen 6, only needs to align the anti-slip block 9 with the positioning groove 4 first, then place the filter screen 6 downward, so that the anti-slip block 9 enters the anti-slip groove 5, and then rotate the filter screen 6 to stagger the anti-slip block 9 with the positioning groove 4, thereby preventing the filter screen 6 from moving upward by itself. When the filter screen 6 needs to be removed, only needs to rotate the filter screen 6 to align the anti-slip block 9 with the positioning groove 4, and then the filter screen 6 can be pulled out. The above structure is relatively simple and not easy to be damaged. In addition, the structure of the filter body 1 in the present invention is similar to the self-cleaning filter structure disclosed in the prior art, patent authorization announcement number CN212975499U, so it will not be elaborated in detail here.

[0025] like Figure 3 and Figure 5As shown, a positioning block 16 is fixed to the bottom of the top plate 14 , and the positioning block 16 matches the positioning groove 4 . A positioning cylinder 11 is fixed to the top of the upper connecting ring 7 and is slidably connected to the top plate 14 .

[0026] like Figure 3 and Figure 5 As shown, the top of the top plate 14 is fixedly connected to an outer sleeve 13 that matches the positioning cylinder 11. A pull-down elastic member 12 is provided inside the positioning cylinder 11. The lower end of the pull-down elastic member 12 is fixedly connected to the upper connecting ring 7, and the upper end of the pull-down elastic member 12 is fixedly connected to the outer sleeve 13.

[0027] Specifically, after rotating the filter screen 6 so that the anti-falling block 9 is offset from the positioning groove 4, the top plate 14 is released. Under the pull of the pull-down elastic member 12, the outer sleeve 13 will be pulled downward, and the outer sleeve 13 will drive the top plate 14 to move downward, thereby allowing the positioning block 16 to be inserted into the positioning groove 4. This can prevent the filter screen 6 from moving upward on its own. When the filter screen 6 needs to be removed, the top plate 14 can be pulled upward first to disengage the positioning block 16 from the positioning groove 4, and then the filter screen 6 can be rotated to align the anti-falling block 9 with the positioning groove 4, and then the filter screen 6 can be pulled upward to remove the filter screen 6 from the filter body 1.

[0028] like Figure 5 As shown, both sides of the top of the top plate 14 are fixed with a lifting handle 15. Pulling the top plate 14 by pulling the handle 15 is more labor-saving and convenient.

[0029] like Figure 5 As shown, both sides of the interior of the upper connecting ring 7 are fixedly connected with a rotating handle 10. Driving the filter screen 6 to rotate by rotating the handle 10 will be more labor-saving and convenient.

[0030] like Figure 5 As shown, the lifting handle 15 and the rotating handle 10 are both U-shaped. The U-shaped lifting handle 15 and the rotating handle 10 are easier to grasp.

[0031] like Figure 4 As shown, the anti-slip groove 5 is L-shaped. The L-shaped anti-slip groove 5 has a better limiting effect on the anti-slip block 9.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A papermaking wastewater filtering device, comprising a filter body (1), characterized in that: The inner wall of the upper end of the filter body (1) is fixedly connected to an upper positioning ring (2), the inner wall of the lower end of the filter body (1) is fixedly connected to a lower positioning ring (3), the inner side of the upper positioning ring (2) is provided with a plurality of equally distributed positioning grooves (4), the upper end of the inner side of the lower positioning ring (3) is provided with a plurality of equally distributed anti-slip grooves (5), the number of the anti-slip grooves (5) matches the number of the positioning grooves (4), the interior of the filter body (1) is slidably connected to a filter screen (6), the top of the filter screen (6) is fixedly connected to an upper connecting ring (7), the bottom of the filter screen (6) is fixedly connected to a lower connecting ring (8), the outer wall of the lower connecting ring (8) is fixedly connected to an anti-slip block (9), the anti-slip block (9) matches the anti-slip groove (5), and a top plate (14) is installed on the top of the upper connecting ring (7).

2. A papermaking wastewater filtration device according to claim 1, characterized in that: A positioning block (16) is fixedly connected to the bottom of the top plate (14), and the positioning block (16) matches the positioning groove (4). A positioning cylinder (11) is fixedly connected to the top of the upper connecting ring (7) in a sliding manner with the top plate (14).

3. The papermaking wastewater filtration device according to claim 2, characterized in that: An outer sleeve (13) matching the positioning cylinder (11) is fixedly connected to the top of the top plate (14); a pull-down elastic member (12) is provided inside the positioning cylinder (11); the lower end of the pull-down elastic member (12) is fixedly connected to the upper connecting ring (7); and the upper end of the pull-down elastic member (12) is fixedly connected to the outer sleeve (13).

4. The papermaking wastewater filtration device according to claim 1, characterized in that: Both sides of the top of the top plate (14) are fixedly connected with lifting handles (15).

5. The papermaking wastewater filtration device according to claim 4, characterized in that: Rotating handles (10) are fixedly connected to both sides of the interior of the upper connecting ring (7).

6. The papermaking wastewater filtration device according to claim 5, characterized in that: The lifting handle (15) and the rotating handle (10) are both U-shaped.

7. The papermaking wastewater filtration device according to claim 1, characterized in that: The anti-slip groove (5) is L-shaped.

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