Plastic filter capable of automatically removing slag

Abstract

The utility model belongs to the technical field of plastic processing equipment, and particularly relates to a plastic filter capable of automatically removing slag, which comprises a machine body and a filter cavity arranged in the machine body, a feeding channel, a discharging channel and an impurity discharging channel are arranged in the filter cavity, and a scraper rotating shaft is rotatably connected in the filter cavity. The rear end of the scraper rotating shaft is in transmission fit with the power device, the front end of the scraper rotating shaft is provided with an impurity discharging screw, the outer ring wall of the scraper rotating shaft is provided with a spiral scraper, a filter screen sleeve is arranged in the filter cavity, the inner ring wall of the filter screen sleeve is matched with the spiral scraper, and the inner end of the feeding channel is located between the filter screen sleeve and the scraper rotating shaft. The inner end of the discharging channel is located on the outer ring side of the filter screen sleeve. The spiral scraper is driven by the scraper rotating shaft to circumferentially rotate in the cylindrical filter screen sleeve so as to scrape impurities on the filter screen sleeve, the space is reasonably utilized through the overall design structure, and meanwhile, under the spiral action of the spiral scraper and the impurity discharging screw rod, the impurities can be discharged outwards through the impurity discharging channel without blocking.

Description

Technical field:

[0001] The utility model belongs to the technical field of plastic processing equipment, in particular to an automatic slag-clearing plastic filter. Background technology:

[0002] In the process of plastic recycling, since there are a lot of impurities in the recycled plastic, it is necessary to use a filtering device to filter the plastic melt in the molten state to remove the impurities. The existing Chinese utility model patent (authorization announcement number CN2041962707U) discloses a netless self-cleaning filter, which includes a filter box with a filter cavity, a feed port and a discharge port are provided on the filter box, a filter plate and a scraper parallel to the filter plate are provided in the filter cavity, the scraper is connected to the driving device through a transmission rod, the filter plates are respectively placed on both sides of the feed port, the filter plates separate the filter cavity into independent first chambers, second chambers and third chambers, the first chamber is connected to the second chamber and the third chamber respectively through the filter holes of the filter plate, the filter box body at the front end of the second chamber and / or the third chamber is provided with holes, and the second chamber and / or the third chamber is connected to the discharge port through the holes; the filter box body below the first chamber is provided with impurity removal holes connected to the outside.

[0003] That is, the above structure is driven by the drive device through the transmission rod to drive the scraper to move inward, so that the scraper can scrape off the impurities attached to the filter plate, and push the impurities to accumulate at the impurity discharge hole of the filter chamber, and then discharge the impurities by opening and closing the discharge valve; however, since the filter plate adopts a plate-like structure and is relatively arranged left and right, and the scraper adopts telescopic movement to scrape off the impurities on the filter plate, it is bound to cause the overall volume to be bloated and occupy a large space. At the same time, impurities accumulate at the impurity discharge hole and are easy to block the impurity discharge hole, and the blocked impurity discharge hole can only be dredged by disassembling the filter box, which is very inconvenient to use and leads to low overall filtration efficiency. Summary of the invention:

[0004] The utility model aims to provide a plastic filter with automatic slag cleaning, which uses a scraper shaft to drive a spiral scraper to rotate circumferentially in a cylindrical filter mesh sleeve to scrape off impurities on the filter mesh sleeve. The size of the whole machine can be effectively reduced. At the same time, under the spiral action of the spiral scraper and the impurity removal screw, impurities can be discharged outward through the impurity removal channel without being blocked.

[0005] The utility model is achieved in this way:

[0006] A plastic filter for automatic slag cleaning comprises an organism and a filter chamber arranged in the organism, wherein a feed channel, a discharge channel and a debris removal channel connected to the outside are provided in the filter chamber, a scraper shaft is rotatably connected in the filter chamber, the rear end of the scraper shaft is transmission-matched with a power device, and the front end is provided with a debris removal screw along its axis which is rotatably matched in the debris removal channel and can drive waste to move forward, more than one spiral scraper is circumferentially distributed on the outer ring wall of the scraper shaft and is spirally bent, and the spiral bending direction of the spiral scraper is the same as the spiral direction of the debris removal screw, a filter mesh sleeve which separates the filter chamber inside and outside is provided in the filter chamber located at the outer periphery of the scraper shaft, the inner ring wall of the filter mesh sleeve cooperates with the spiral scraper, the inner end of the feed channel is located between the filter mesh sleeve and the scraper shaft, and the inner end of the discharge channel is located on the outer ring side of the filter mesh sleeve.

[0007] In the above-mentioned automatic slag cleaning plastic filter, the filter mesh sleeve is a conical sleeve structure with a smaller inner diameter and a larger outer diameter at the front and a larger outer diameter at the back, and the outer ring wall structure of the scraper shaft corresponds to the filter mesh sleeve structure.

[0008] In the above-mentioned automatic residue cleaning plastic filter, a discharge sleeve is arranged in the filter cavity located at the outer periphery of the filter mesh sleeve, a filter cavity is formed between the discharge sleeve and the filter mesh sleeve, and the filter cavity completely covers the filter mesh holes of the filter mesh sleeve, a discharge cavity is formed between the discharge sleeve and the filter cavity, a flow channel connecting the filter cavity and the discharge cavity is opened on the discharge sleeve, and the inner end of the discharge channel is connected to the discharge cavity.

[0009] In the above-mentioned automatic slag cleaning plastic filter, a filter groove is provided on the inner ring wall of the discharge sleeve, the filter cavity is formed between the filter groove and the filter mesh sleeve, and the flow passage is provided on the filter groove.

[0010] In the above-mentioned automatic slag cleaning plastic filter, the filter groove is arranged in a spiral coil, and the flow passage is a flow hole opened on each spiral layer of the filter groove along the axial direction of the discharge sleeve.

[0011] In the above-mentioned automatic slag cleaning plastic filter, a discharge groove is provided on the inner wall surface of the filter cavity, the discharge cavity is formed between the discharge groove and the discharge sleeve, and the inner end of the discharge channel is provided on the discharge groove.

[0012] In the above-mentioned automatic slag cleaning plastic filter, the discharge groove includes a front groove portion and a rear groove portion which are spirally wound and have opposite spiral directions, and the inner end of the discharge channel is opened at the connecting junction of the front groove portion and the rear groove portion.

[0013] In the above-mentioned automatic slag cleaning plastic filter, the rear end of the scraper shaft extends out of the machine body and is connected to the power device through a gear box. The rear end of the scraper shaft rotates synchronously circumferentially and slides axially relative to the output gear of the gear box through a spline groove. A compression spring is arranged between the rear end of the scraper shaft and the gear box to exert elastic force on the scraper shaft forward.

[0014] The outstanding advantages of the utility model compared with the prior art are:

[0015] The utility model has reasonable design, stable transmission and high filtration efficiency. The scraper shaft drives the spiral scraper to rotate circumferentially in the cylindrical filter mesh sleeve to scrape off impurities on the filter mesh sleeve. The overall design structure makes reasonable use of space, so that the size of the whole machine can be effectively reduced and it can ensure that the plastic solution has sufficient flow space. At the same time, under the spiral action of the spiral scraper and the impurity removal screw, impurities can also be discharged outward through the impurity removal channel without being blocked. Description of the drawings:

[0016] Figure 1 It is a sectional view of the overall structure of the utility model;

[0017] Figure 2 It is an exploded view of the scraper shaft, the filter screen sleeve and the discharging sleeve of the utility model.

[0018] In the figure: 1. machine body; 2. feed channel; 3. discharge channel; 4. scraper shaft; 5. impurity removal screw; 6. spiral scraper; 7. filter mesh sleeve; 8. discharge sleeve; 9. filter groove; 10. flow hole; 11. discharge groove; 12. front groove; 13. rear groove; 14. gear box; 15. spline groove; 16 compression spring. Specific implementation method:

[0019] The present invention is further described below with reference to specific embodiments. Figure 1 —2:

[0020] A plastic filter for automatic slag removal comprises a body 1 and a filter chamber arranged in the body 1, wherein a feed channel 2, a discharge channel 3 and a waste removal channel communicating with the outside are provided in the filter chamber, a scraper shaft 4 is rotatably connected in the filter chamber, the rear end of the scraper shaft 4 is matched with a power device for transmission, and a waste removal screw 5 is provided along its axis for rotationally matching in the waste removal channel and capable of driving waste to move forward, more than one spiral scraper 6 is circumferentially distributed on the outer ring wall of the scraper shaft 4 and is arranged in a spiral bending manner, and the spiral bending direction of the spiral scraper 6 is the same as the spiral direction of the waste removal screw 5, a filter mesh sleeve 7 is arranged in the filter chamber located on the outer periphery of the scraper shaft 4 to separate the filter chamber inside and outside, the inner ring wall of the filter mesh sleeve 7 is matched with the spiral scraper 6, the inner end of the feed channel 2 is located between the filter mesh sleeve 7 and the scraper shaft 4, and the inner end of the discharge channel 3 is located on the outer ring side of the filter mesh sleeve 7. The power device can be an existing rotary oil cylinder or a driving motor.

[0021] The working principle of the utility model is as follows: the plastic melt in the molten state flows into the space between the filter mesh sleeve 7 and the scraper shaft 4 through the feed channel 2, and then filters the impurities through the filter mesh sleeve 7 and flows into the discharge channel 3, and the scraper shaft 4 drives the spiral scraper 6 to rotate circumferentially in the filter mesh sleeve 7 to scrape off the impurities on the filter mesh sleeve 7, and driven by the spiral rotation of the spiral scraper 6, the impurities can move forward and enter the matching space between the impurity removal screw 5 and the discharge channel, and then driven by the spiral rotation of the impurity removal screw 5, the impurities are discharged outward through the impurity removal channel

[0022] The utility model has reasonable design, stable transmission and high filtering efficiency. The scraper shaft 4 drives the spiral scraper 6 to rotate circumferentially in the cylindrical filter mesh sleeve 7 to scrape off impurities on the filter mesh sleeve 7. The overall design structure makes reasonable use of space, so that the size of the whole machine can be effectively reduced, and it can ensure that the plastic solution has sufficient flow space. At the same time, under the spiral action of the spiral scraper 6 and the impurity removal screw 5, impurities can also be discharged outward through the impurity removal channel without being blocked.

[0023] Furthermore, in order to quickly separate the impurities near the impurity removal screw 5 from the plastic solution and ensure that the impurities scraped off the filter mesh sleeve 7 can be gathered at the impurity removal screw 5, the filter mesh sleeve 7 is a conical sleeve structure with an inner diameter and an outer diameter that are both small in the front and large in the back, and the outer ring wall structure of the scraper shaft 4 corresponds to the structure of the filter mesh sleeve 7.

[0024] Taking into account the filter cavity separated by the filter mesh sleeve 7 and the support strength required to bear the pressure of the plastic melt flowing through, a discharge sleeve 8 is arranged in the filter cavity located at the outer periphery of the filter mesh sleeve 7, a filter cavity is formed between the discharge sleeve 8 and the filter mesh sleeve 7, and the filter cavity completely covers the filter mesh holes of the filter mesh sleeve 7, a discharge cavity is formed between the discharge sleeve 8 and the filter cavity, a flow channel connecting the filter cavity and the discharge cavity is opened on the discharge sleeve 8, and the inner end of the discharge channel 3 is connected to the discharge cavity.

[0025] The specific structure formed by the filter cavity is as follows: a filter groove 9 is provided on the inner ring wall of the discharge sleeve 8, the filter cavity is formed between the filter groove 9 and the filter mesh sleeve 7, and the flow passage is provided on the filter groove 9. In addition, in order to make each filter mesh hole in the filter mesh sleeve 7 correspond to the slot hole of the filter groove 9 and guide the plastic melt to flow quickly into the flow passage, in this embodiment, the filter groove 9 is spirally wound, and the flow passage is a flow hole 10 provided on each spiral layer of the filter groove 9 along the axial direction of the discharge sleeve 8.

[0026] Correspondingly, the specific structure formed by the discharge cavity is as follows: a discharge groove 11 is provided on the inner wall surface of the filter cavity, the discharge cavity is formed between the discharge groove 11 and the discharge sleeve 8, and the inner end of the discharge channel 3 is provided on the discharge groove 11. At the same time, in order to enable the plastic melt in each filter through hole to quickly flow to the discharge channel 3, the discharge groove 11 includes a front groove portion 12 and a rear groove portion 13 which are spirally wound and have opposite spiral directions, and the inner end of the discharge channel 3 is provided at the connecting and converging place of the front groove portion 12 and the rear groove portion 13.

[0027] At the same time, in the process of transmission cooperation between the scraper shaft 4 and the power device, in order to enable the scraper shaft 4 to have a forward axial thrust to stably drive the impurities forward, in the present embodiment, the rear end of the scraper shaft 4 extends out of the machine body 1 and is connected to the power device through the gear box 14, and the rear end of the scraper shaft 4 rotates synchronously circumferentially and slides axially relative to the output gear of the gear box 14 through the spline groove 15, and a compression spring 16 is arranged between the rear end of the scraper shaft 4 and the gear box 14, the elastic force of which acts forward on the scraper shaft 4.

[0028] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A plastic filter with automatic slag removal, characterized in that: The invention comprises an organic body (1) and a filter chamber arranged in the organic body (1), wherein a feed channel (2), a discharge channel (3) and a waste removal channel communicating with the outside are provided in the filter chamber, a scraper shaft (4) is rotatably connected in the filter chamber, the rear end of the scraper shaft (4) is in driving cooperation with a power device, and the front end is provided with a waste removal screw (5) along its axis which is rotatably cooperated in the waste removal channel and can drive the waste to move forward, and the outer ring wall of the scraper shaft (4) has more than one impurity removal screw (5) circumferentially distributed. A spiral scraper (6) is arranged in a spiral bending direction, and the spiral bending direction of the spiral scraper (6) is the same as the spiral direction of the impurity removal screw (5). A filter mesh sleeve (7) is arranged in a filter cavity located on the periphery of the scraper rotating shaft (4) to separate the filter cavity inside and outside. The inner ring wall of the filter mesh sleeve (7) cooperates with the spiral scraper (6). The inner end of the feed channel (2) is located between the filter mesh sleeve (7) and the scraper rotating shaft (4), and the inner end of the discharge channel (3) is located on the outer ring side of the filter mesh sleeve (7).

2. The automatic slag-cleaning plastic filter according to claim 1, characterized in that: The filter mesh sleeve (7) is a conical sleeve structure with an inner diameter and an outer diameter both being smaller at the front and larger at the back, and the outer ring wall structure of the scraper shaft (4) corresponds to the structure of the filter mesh sleeve (7).

3. The automatic slag-cleaning plastic filter according to claim 1 or 2, characterized in that: A discharge sleeve (8) is arranged in the filter cavity located at the periphery of the filter mesh sleeve (7), a filter cavity is formed between the discharge sleeve (8) and the filter mesh sleeve (7), and the filter cavity completely covers the filter mesh holes of the filter mesh sleeve (7), a discharge cavity is formed between the discharge sleeve (8) and the filter cavity, a flow channel connecting the filter cavity and the discharge cavity is opened on the discharge sleeve (8), and the inner end of the discharge channel (3) is connected to the discharge cavity.

4. The automatic slag-cleaning plastic filter according to claim 3, characterized in that: A filtering groove (9) is provided on the inner ring wall of the discharge sleeve (8), the filtering cavity is formed between the filtering groove (9) and the filtering mesh sleeve (7), and the flow passage is provided on the filtering groove (9).

5. The automatic slag-cleaning plastic filter according to claim 4, characterized in that: The filter groove (9) is arranged in a spiral coil, and the flow passage is a flow hole (10) opened on each spiral layer of the filter groove (9) along the axial direction of the discharge sleeve (8).

6. The automatic slag-cleaning plastic filter according to claim 3, characterized in that: A discharge groove (11) is provided on the inner wall surface of the filter cavity, the discharge cavity is formed between the discharge groove (11) and the discharge sleeve (8), and the inner end of the discharge channel (3) is provided on the discharge groove (11).

7. The automatic slag-cleaning plastic filter according to claim 6, characterized in that: The discharge groove (11) comprises a front groove portion (12) and a rear groove portion (13) which are arranged in a spiral shape and have opposite spiral directions, and the inner end of the discharge channel (3) is opened at the connecting and converging point of the front groove portion (12) and the rear groove portion (13).

8. The automatic slag-cleaning plastic filter according to claim 1, characterized in that: The rear end of the scraper shaft (4) extends out of the machine body (1) and is connected to the power device through a gear box (14). The rear end of the scraper shaft (4) rotates synchronously in the circumferential direction and slides axially relative to the output gear of the gear box (14) through a spline groove (15). A compression spring (16) is provided between the rear end of the scraper shaft (4) and the gear box (14) to exert elastic force on the scraper shaft (4) in a forward direction.

Images