Self-cleaning filter for non-stop screen replacement

Abstract

The utility model relates to a self-cleaning filter for non-stop screen replacement, which effectively solves the problems that impurities block a filter plate and are scraped off to block the filter plate again. According to the technical scheme, the device comprises a cylindrical shell, a coaxial rotating shaft is rotationally arranged in the middle of the shell, a disc is fixed to the portion, located in the shell, of the lower end of the rotating shaft, the lower end face of the disc makes contact with the lower end face of the shell and is not fixed, a plurality of through holes evenly distributed in the circumference are formed in the upper end face of a round rod, and a circular ring is arranged in each through hole; the outer edge of the ring is in contact with the inner edge of the through hole and is not fixed, and the ring always bears downward force; a filter plate is fixed on the lower side of the inner edge of the ring and divides the inner side of the ring into an upper part and a lower part; after the filter plate is blocked, impurities blocked on the lower side of the filter plate and raw materials which are remained in the through holes, are positioned on the lower side of the filter plate and contain more impurities are discharged through the slag discharge port by the reverse blowing force of downward pushing of the partition plate, and meanwhile, the problem that the filter plate is blocked again due to the fact that the impurities are scraped off by a scraper and cannot be discharged in time can be solved by a reverse blowing mode.

Description

Technical Field

[0001] The utility model relates to the field of filters, in particular to a self-cleaning filter for changing nets without stopping the machine. Background Art

[0002] On September 27, 2019, our company applied for an authorization publication number of CN210613077U and the name of the fully automatic metal mesh filter. The scraper 8 scrapes the impurities and stores them in the cavity 13. When the amount of impurities in the cavity 13 is large, the slag discharge port 9 is opened to discharge the impurities in the cavity 13. This method can better achieve the removal of impurities, but there are still the following problems;

[0003] 1. As the impurities on the filter plate are scraped off by a scraper, it is inevitable that some impurities will be stuck on the filter plate. Scraping by the scraper will cause the impurities stuck on the filter plate to be cut off and cannot be scraped out, affecting the filtering effect.

[0004] 2. When discharging after scraping, since the scraped impurities will be suspended in the molten raw material, when there are more impurities in the cavity 13, some impurities will overflow from the cavity 13 and cannot be removed in time, resulting in the problem of clogging the filter again. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a self-cleaning filter for changing the screen without stopping the machine, which effectively solves the problem of impurities clogging the filter plate and being scraped off and clogging the filter plate again.

[0006] The technical solution is a self-cleaning filter for non-stop screen replacement, comprising a cylindrical shell, a coaxial rotating shaft rotating in the middle of the shell, a disc fixed at the lower end of the rotating shaft inside the shell, the lower end surface of the disc in contact with the lower end surface of the shell and not fixed, a plurality of through holes evenly distributed around the circumference are opened on the upper end surface of the round rod, each through hole is equipped with a circular ring that moves up and down, the outer edge of the circular ring in contact with the inner edge of the through hole and not fixed, and the circular ring is always subjected to a downward force; a filter plate is fixed on the lower side of the inner edge of the circular ring, and the filter plate divides the inner side of the circular ring into upper and lower parts; a circular plate is fixed on the upper side of the shell, and the circular plate divides the inside of the shell into two parts, and the circular disk is in contact with the circular plate and not fixed;

[0007] A feed port is provided on the left side of the lower end surface of the shell, a clearance hole is provided on the upper end surface of the circular plate just above the feed port, a liquid outlet pipe is fixed on the upper end of the clearance hole, and the liquid outlet pipe passes through the outer edge of the shell and is placed outside; a slag discharge port is provided on the rear side of the lower end surface of the shell, and the slag discharge port can be opened and closed, an air inlet is provided on the rear side of the upper end surface of the circular plate, a cylinder with upper and lower openings is fixed on the circular plate just above the air inlet, and a partition plate that moves up and down is installed in the cylinder, and the partition plate can move downward quickly;

[0008] When one of the through holes on the disc is located directly above the feed port, the disc stops rotating. Every time the ring in the circular hole directly above the feed port moves upward, the rotating shaft can rotate the through hole directly above the feed port to directly above the slag discharge port on the rear side, the slag discharge port opens, and the partition moves downward.

[0009] A plurality of fixed blocks evenly distributed around the circumference are fixed in the middle of the outer edge of each of the circular rings, and the number of fixed blocks is greater than or equal to two. A plurality of evenly distributed sink grooves are opened in the middle of the inner edge of the through hole on the disc, and the sink grooves are arranged up and down. The number of sink grooves in each through hole is the same as the number of fixed blocks on a corresponding circular ring; the fixed blocks on the circular ring are placed in the sink grooves in the through hole and slide up and down. When the fixed blocks slide up and down in the sink grooves, the circular ring always blocks the sink grooves;

[0010] A compression spring is fixed on the upper side of each fixed block, and the upper end of the compression spring is fixed on the upper side of the sink groove. The compression spring gives the fixed block a force to move downward.

[0011] The lower end surface of the shell is located at the rear side of the slag discharge port and is fixed with round rods arranged up and down. The rotating rods are covered with baffles, which can rotate around the axis of the round rods. The baffles rotate forward to block the slag discharge port.

[0012] A torsion spring is sleeved on the round rod, one end of the torsion spring is fixed on the round rod, and the other end of the torsion spring is fixed on the baffle. The torsion spring gives the baffle a force to rotate forward to block the slag discharge port;

[0013] The lower end of the rotating shaft passes through the lower end surface of the shell and is placed outside the shell. The outer edge of the rotating shaft is located on the lower side of the shell and is fixed with multiple straight rods pointing to the axis of the rotating shaft. The number of the straight rods is the same as the number of through holes. After the straight rods rotate with the rotating shaft, the straight rods can push the baffle to rotate, so that the slag discharge port is opened.

[0014] A vertical rod that can only move up and down is fixed on the upper end surface of the partition, the upper end of the vertical rod passes through the upper end surface of the shell and is placed outside the shell, a tension spring is sleeved on the vertical rod, the lower end of the tension spring is fixed on the shell, the upper end of the tension spring is fixed on the vertical rod, and a crossbar pointing to the axis of the rotating shaft is fixed on the upper end of the vertical rod;

[0015] The upper end of the rotating shaft passes through the upper end surface of the shell and is placed outside the shell. The outer edge of the rotating shaft is located on the upper side of the shell and a ring block is fixed. The upper end of the ring block is unfolded around the axis into a serrated shape, and the number of serrations is the same as the number of through holes. The cross bar contacts the upper end of the ring block. The ring block can move upward through the cross bar to drive the vertical bar as the rotating shaft rotates. After the cross bar reaches the highest position of the ring block, it can move downward under the action of the tension spring, and the rotating shaft does not rotate at this time.

[0016] A switch is fixed on the upper side of one of the troughs in each of the through holes, and a motor is installed above the rotating shaft. The motor and the rotating shaft are connected via a coupling. The switch can control the start of the motor alone. Each rotation of the motor can rotate the through hole directly above the feed port to directly above the slag discharge port on the rear side.

[0017] The utility model discloses that after the filter plate is blocked, the back-blowing force pushed down by the partition makes the impurities blocked on the lower side of the filter plate and the raw materials containing more impurities remaining in the through holes and located on the lower side of the filter plate be discharged through the slag discharge port. The back-blowing effect can make the filter screen cleaner, and there will be no problem that the scraper will cut off the impurities and still get stuck on the filter plate. At the same time, the back-blowing method can also prevent the scraper from scraping off the impurities and failing to discharge them in time to block the filter plate again. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the utility model.

[0019] Figure 2 This is a front cross-sectional view of the utility model without the motor.

[0020] Figure 3 It is a front cross-sectional view of the shell and the disc of the utility model.

[0021] Figure 4 This is a left side cross-sectional view of the utility model without the motor.

[0022] Figure 5 This is a top view of the utility model without the motor and the upper end surface of the shell.

[0023] Figure 6 It is a bottom view of the utility model.

[0024] Figure 7 It is a top view of the disc, filter plate and ring of the utility model.

[0025] Figure 8 For the utility model Figure 7 AA section view.

[0026] Fig. 9 It is a three-dimensional diagram of the disc of the utility model.

[0027] Fig.10 It is a three-dimensional diagram of a cylindrical block of the present utility model. DETAILED DESCRIPTION

[0028] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0029] Depend on Figures 1 to 10The utility model comprises a cylindrical shell 1, a coaxial rotating shaft 2 is rotated in the middle of the shell 1, a disc 3 is fixed at the lower end of the rotating shaft 2 inside the shell 1, the lower end surface of the disc 3 is in contact with the lower end surface of the shell 1 and is not fixed, a plurality of through holes 4 evenly distributed around the circumference are opened on the upper end surface of the round rod 16, each through hole 4 is equipped with a circular ring 5 that moves up and down, the outer edge of the circular ring 5 is in contact with the inner edge of the through hole 4 and is not fixed, and the circular ring 5 is always subjected to a downward force; a filter plate 6 is fixed on the lower side of the inner edge of the circular ring 5, and the filter plate 6 divides the inner side of the circular ring 5 into upper and lower parts; a circular plate 7 is fixed on the upper side of the shell 1 on the disc 3, and the circular plate 7 divides the inside of the shell 1 into two parts, and the disc 3 is in contact with the circular plate 7 and is not fixed;

[0030] A feed port 8 is provided on the left side of the lower end surface of the shell 1, and a clearance hole 9 is provided on the upper end surface of the circular plate 7 just above the feed port 8. A liquid outlet pipe 10 is fixed on the upper end of the clearance hole 9, and the liquid outlet pipe 10 passes through the outer edge of the shell 1 and is placed outside; a slag discharge port 11 is provided on the rear side of the lower end surface of the shell 1, and the slag discharge port 11 can be opened and closed, and an air inlet 12 is provided on the rear side of the upper end surface of the circular plate 7, and a cylinder 24 with upper and lower openings is fixed on the circular plate 7 just above the air inlet 12, and a partition plate 13 that moves up and down is installed in the cylinder 24, and the partition plate 13 can move downward quickly;

[0031] When one of the through holes 4 on the disc 3 is located directly above the feed port 8, the disc 3 stops rotating. Whenever the ring 5 in the circular hole directly above the feed port 8 moves upward, the rotating shaft 2 can rotate the through hole 4 directly above the feed port 8 to directly above the slag discharge port 11 on the rear side, the slag discharge port 11 opens, and the partition 13 moves downward.

[0032] A plurality of evenly distributed fixing blocks 14 are fixed to the middle of the outer edge of each of the circular rings 5, and the fixing blocks 14 are greater than or equal to two. A plurality of evenly distributed sinking grooves 15 are opened in the middle of the inner edge of the through hole 4 on the disc 3, and the sinking grooves 15 are arranged up and down. The number of sinking grooves 15 in each through hole 4 is the same as the number of fixing blocks 14 on a corresponding circular ring 5; the fixing blocks 14 on the circular ring 5 are placed in the sinking grooves 15 in the through hole 4 and slide up and down. When the fixing blocks 14 slide up and down in the sinking grooves 15, the circular ring 5 always blocks the sinking grooves 15;

[0033] A compression spring is fixed on the upper side of each fixing block 14 , and the upper end of the compression spring is fixed on the upper side of the sink 15 . The compression spring applies a force to the fixing block 14 to move downward.

[0034] The lower end surface of the shell 1 is located at the rear side of the slag discharge port 11 and is fixed with a round rod 16 arranged up and down. A baffle 17 is sleeved on the rotating rod. The baffle 17 can rotate around the axis of the round rod 16. The baffle 17 rotates forward to block the slag discharge port 11.

[0035] A torsion spring is sleeved on the round rod 16, one end of the torsion spring is fixed on the round rod 16, and the other end of the torsion spring is fixed on the baffle 17. The torsion spring gives the baffle 17 a force to rotate forward to block the slag discharge port 11;

[0036] The lower end of the rotating shaft 2 passes through the lower end surface of the shell 1 and is placed outside the shell 1. The outer edge of the rotating shaft 2 is located on the lower side of the shell 1 and is fixed with multiple straight rods 18 pointing to the axis of the rotating shaft 2. The number of the straight rods 18 is the same as the number of the through holes 4. After the straight rods 18 rotate with the rotating shaft 2, the straight rods 18 can push the baffle 17 to rotate, so that the slag discharge port 11 is opened.

[0037] A vertical rod 19 that can only move up and down is fixed on the upper end surface of the partition 13. The upper end of the vertical rod 19 passes through the upper end surface of the shell 1 and is placed outside the shell 1. A tension spring is sleeved on the vertical rod 19. The lower end of the tension spring is fixed on the shell 1. The upper end of the tension spring is fixed on the vertical rod 19. A crossbar 20 pointing to the axis of the rotating shaft 2 is fixed on the upper end of the vertical rod 19.

[0038] The upper end of the rotating shaft 2 passes through the upper end surface of the shell 1 and is placed outside the shell 1. The outer edge of the rotating shaft 2 is located on the upper side of the shell 1 and a ring block 21 is fixed. The upper end of the ring block 21 is unfolded around the axis to be serrated, and the number of serrations is the same as the number of through holes 4. The cross bar 20 contacts the upper end of the ring block 21. The ring block 21 can drive the vertical rod 19 to move upward through the cross bar 20 as the rotating shaft 2 rotates. After the cross bar 20 reaches the highest position of the ring block 21, it can move downward under the action of the tension spring, and the rotating shaft 2 does not rotate at this time.

[0039] A switch 22 is fixed on the upper side of one of the troughs 15 in each of the through holes 4, and a motor 23 is installed above the rotating shaft 2. The motor 23 is connected to the rotating shaft 2 via a coupling. The switch 22 can independently control the start of the motor 23. Each rotation of the motor 23 can rotate the through hole 4 directly above the feed port 8 to directly above the slag discharge port 11 on the rear side.

[0040] Before the utility model is used, the through hole 4 on the left side of the disc 3 is placed just above the feed port 8, and the through hole 4 on the rear side of the disc 3 is placed just above the slag discharge port 11; the ring 5 moves to the lowest side of the displacement under the action of the compression spring, the switch 22 is in the off state, and the motor 23 does not rotate; at this time, the cross bar 20 is located at the lowest side of the serrated upper end of the annular block 21, and the partition 13 is placed at the lowest side in the cylinder 24;

[0041] When the utility model is used, the raw material in a molten state enters the through hole 4 on the disc 3 located directly above through the feed port 8, is filtered through the filter plate 6, and finally flows out through the liquid outlet pipe 10;

[0042] When the filter plate 6 is gradually clogged, the filter plate 6 is pushed by the pressure of the raw material to drive the ring 5 to move upward. When the fixed block 14 on the ring 5 moves upward to trigger the switch 22, the motor 23 rotates, and the motor 23 drives the disc 3 to rotate via the rotating shaft 2, so that the through hole 4 located directly above the feed port 8 rotates to directly above the slag discharge port 11 on the rear side, and the through hole 4 on the front side of the disc 3 moves to directly above the feed port 8 to continue filtering without stopping the machine for operation;

[0043] During the rotation of the through hole 4 located just above the feed port 8 toward the top of the slag discharge port 11 at the rear side, the straight rod 18 at the lower side of the rotating shaft 2 gradually pushes the baffle 17 at the lower side to rotate, and at the same time, the cylindrical block pushes the cross bar 20 to move upward, and the cross bar 20 drives the partition 13 to move upward through the vertical rod 19 until the through hole 4 is placed just above the slag discharge port 11 at the rear side, and the slag discharge port 11 is opened, and at the same time, the cross bar 20 is separated from the highest point of the annular block 21, and the tension spring drives the partition 13 to move downward through the vertical rod 19, and the partition 13 moves downward to make the position The gas on the lower side of the partition plate 13 in the cylinder 24 and the filtered raw materials on the upper side of the filter plate 6 through the through hole 4 are pushed downward, so that the impurities blocked on the lower side of the filter plate 6 and the raw materials with more impurities remaining in the through hole 4 and located on the lower side of the filter plate 6 are discharged through the slag discharge port 11, completing one filter screen replacement. At the same time, the filter screen is made cleaner by the backblowing effect, and there will be no problem that the scraper cuts off the impurities and still gets stuck on the filter plate 6. The backblowing method can also prevent the scraper from damaging the filter plate 6, thereby extending the service life.

[0044] Afterwards, whenever the filter plate 6 is clogged, the above steps are repeated, eliminating the need for manual repeated replacement of the filter screen.

[0045] 1. After the filter plate 6 is blocked, the motor 23 moves the blocked filter plate 6 to the slag discharge port 11, and the back-blowing force pushed down by the partition 13 causes the impurities blocked on the lower side of the filter plate 6 and the raw materials containing more impurities remaining in the through hole 4 and located on the lower side of the filter plate 6 to be discharged through the slag discharge port 11; the back-blowing effect can make the filter screen cleaner, and there will be no problem that the scraper cuts off the impurities and still gets stuck on the filter plate 6. At the same time, the back-blowing method can also prevent the scraper from damaging the filter plate 6, thereby extending the service life.

[0046] 2. According to the utility model, after the filter plate 6 is blocked, the filter plate 6 moves upward, so that the motor 23 starts to change the net, which eliminates the need for manual net change and can also prevent the problem of difficulty in determining whether the net needs to be changed during net change.

Claims

1. A self-cleaning filter for non-stop screen replacement, characterized in that: The invention comprises a cylindrical shell (1), wherein a coaxial rotating shaft (2) is rotatable in the middle of the shell (1), a disc (3) is fixed at the lower end of the rotating shaft (2) inside the shell (1), the lower end surface of the disc (3) is in contact with the lower end surface of the shell (1) and is not fixed, a plurality of through holes (4) are opened on the upper end surface of the round rod (16), each through hole (4) is equipped with a circular ring (5) that moves up and down, the outer edge of the circular ring (5) is in contact with the inner edge of the through hole (4) and is not fixed, and the circular ring (5) is always subjected to a downward force; a filter plate (6) is fixed on the lower side of the inner edge of the circular ring (5), and the filter plate (6) divides the inner side of the circular ring (5) into upper and lower parts; a circular plate (7) is fixed on the upper side of the shell (1) and the circular plate (7) is located, and divides the inside of the shell (1) into two parts, and the circular plate (3) is in contact with the circular plate (7) and is not fixed; A feed port (8) is provided on the left side of the lower end surface of the shell (1); a clearance hole (9) is provided on the upper end surface of the circular plate (7) directly above the feed port (8); a liquid outlet pipe (10) is fixed at the upper end of the clearance hole (9); the liquid outlet pipe (10) passes through the outer edge of the shell (1) and is placed outside; a slag discharge port (11) is provided on the rear side of the lower end surface of the shell (1); the slag discharge port (11) can be opened and closed; an air inlet (12) is provided on the rear side of the upper end surface of the circular plate (7); a cylinder (24) with upper and lower openings is fixed on the circular plate (7) directly above the air inlet (12); a partition plate (13) that moves up and down is installed in the cylinder (24); the partition plate (13) can move downward quickly; When one of the through holes (4) on the disc (3) is located directly above the feed port (8), the disc (3) stops rotating, and each time the ring (5) in the circular hole directly above the feed port (8) moves upward, the rotating shaft (2) can rotate the through hole (4) directly above the feed port (8) to directly above the slag discharge port (11) on the rear side, the slag discharge port (11) opens, and the partition plate (13) moves downward.

2. The self-cleaning filter for non-stop screen changing according to claim 1, characterized in that: A plurality of evenly distributed fixing blocks (14) are fixed to the middle of the outer edge of each of the circular rings (5), and the number of the fixing blocks (14) is greater than or equal to two. A plurality of evenly distributed sinking grooves (15) are opened in the middle of the inner edge of the through hole (4) on the circular disk (3), and the sinking grooves (15) are arranged up and down. The number of sinking grooves (15) in each through hole (4) is the same as the number of the fixing blocks (14) on the corresponding circular ring (5). The fixing blocks (14) on the circular ring (5) are placed in the sinking grooves (15) in the through hole (4) and slide up and down. When the fixing blocks (14) slide up and down in the sinking grooves (15), the circular ring (5) always blocks the sinking grooves (15); A compression spring is fixed on the upper side of each fixed block (14), and the upper end of the compression spring is fixed on the upper side of the sink groove (15). The compression spring applies a force to the fixed block (14) to move downward.

3. The self-cleaning filter for non-stop screen changing according to claim 1, characterized in that: The lower end surface of the shell (1) is located at the rear side of the slag discharge port (11) and is fixed with a round rod (16) arranged up and down, and a baffle (17) is sleeved on the rotating rod. The baffle (17) can rotate around the axis of the round rod (16). The baffle (17) rotates forward to block the slag discharge port (11); A torsion spring is sleeved on the round rod (16), one end of the torsion spring is fixed on the round rod (16), and the other end of the torsion spring is fixed on the baffle (17). The torsion spring gives the baffle (17) a force to rotate forward to block the slag discharge port (11); The lower end of the rotating shaft (2) passes through the lower end surface of the shell (1) and is placed outside the shell (1). The outer edge of the rotating shaft (2) is located on the lower side of the shell (1) and is fixed with a plurality of straight rods (18) pointing to the axis of the rotating shaft (2). The number of the straight rods (18) is the same as the number of the through holes (4). After the straight rods (18) rotate with the rotating shaft (2), the straight rods (18) can push the baffle (17) to rotate, so that the slag discharge port (11) is opened.

4. The self-cleaning filter for non-stop screen changing according to claim 1, characterized in that: A vertical rod (19) that can only move up and down is fixed on the upper end surface of the partition (13), the upper end of the vertical rod (19) passes through the upper end surface of the shell (1) and is placed outside the shell (1), a tension spring is sleeved on the vertical rod (19), the lower end of the tension spring is fixed to the shell (1), the upper end of the tension spring is fixed to the vertical rod (19), and a cross rod (20) pointing to the axis of the rotating shaft (2) is fixed to the upper end of the vertical rod (19); The upper end of the rotating shaft (2) passes through the upper end surface of the shell (1) and is placed outside the shell (1). The outer edge of the rotating shaft (2) is located on the upper side of the shell (1) and a ring block (21) is fixed. The upper end of the ring block (21) is spread out around the axis to form a sawtooth shape, and the number of sawteeth is the same as the number of through holes (4). The cross bar (20) contacts the upper end of the ring block (21). The ring block (21) can drive the vertical rod (19) to move upwards through the cross bar (20) as the rotating shaft (2) rotates. After the cross bar (20) reaches the highest position of the ring block (21), it can move downwards under the action of a tension spring, and at this time the rotating shaft (2) does not rotate.

5. The self-cleaning filter for non-stop screen changing according to claim 2, characterized in that: A switch (22) is fixed on the upper side of one of the troughs (15) in each of the through holes (4), and a motor (23) is installed above the rotating shaft (2). The motor (23) is connected to the rotating shaft (2) via a coupling. The switch (22) can independently control the start of the motor (23). Each rotation of the motor (23) can rotate the through hole (4) directly above the feed port (8) to directly above the slag discharge port (11) at the rear side.

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