Automatic deslagging device of screw extruder and operation method of automatic deslagging device

Abstract

The invention provides an automatic deslagging device of a screw extruder, which comprises a mounting sleeve and a filter screen sleeve which are detachably mounted on the extruder, a filter cavity is arranged in the mounting sleeve, the filter screen sleeve is arranged in the mounting sleeve, a discharge cavity is arranged between the filter screen sleeve and the inner wall of the mounting sleeve, a plurality of filter holes are circumferentially formed in the side wall of the filter screen sleeve, and the filter holes are communicated with the filter cavity. A plurality of filtering holes are formed in the mounting sleeve and used for communicating the filtering cavity with the discharging cavity, a discharging pipe communicating with the discharging cavity is arranged on the mounting sleeve, and a detachable induction deslagging assembly communicates with the end, away from the extruder, of the mounting sleeve. The device has the advantage of automatic deslagging.

Description

Technical Field

[0001] The invention relates to the technical field of extruder accessory device design, and in particular to an automatic slag discharge device for a screw extruder and an operating method thereof. Background Art

[0002] At present, the molten slurry in the extruder needs to be filtered and deslagging. The existing invention patent with publication number CN104816448B and the name of a filter for an extruder discloses the content, including a filter body; a porous plate, which supports the filter body from the downstream side and has a plurality of through holes that serve as passages for the polymer material; a support body, which supports the porous plate from the downstream side; the support body is composed of a frame portion that can abut against the outer diameter portion of the porous plate and a plurality of beam portions extending from the frame portion toward the inner circumference.

[0003] When the above-mentioned filtering device is actually used, it is generally installed at the port in the extension direction of the extruder screw. After long-term use, the filtered waste residue will accumulate on the filtering device. At this time, the filtering device needs to be taken out of the extruder and the waste residue on it needs to be cleaned. This method is not conducive to the continuous production of the extruder because the extruder needs to be shut down first, and then the extruder and the filtering device need to be disassembled and assembled. In addition, the trouble of disassembly will greatly reduce the work efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an automatic slag discharge device for a screw extruder and an operating method thereof, which are mainly used to solve the problem in the background art that the existing filtering device is troublesome to replace and is not conducive to the continuous production of the extruder.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] An automatic deslagging device for a screw extruder comprises a mounting sleeve and a filter sleeve which can be detachably mounted on the extruder, wherein a filter cavity is arranged in the mounting sleeve, the filter sleeve is arranged in the mounting sleeve, a discharge cavity is arranged between the filter sleeve and the inner wall of the mounting sleeve, a plurality of filter holes are circumferentially provided on the side wall of the filter sleeve, the plurality of filter holes are used to connect the filter cavity with the discharge cavity, a discharge pipe which is connected with the discharge cavity is arranged on the mounting sleeve, and a detachable induction deslagging component is arranged on the mounting sleeve and connected at the end away from the extruder.

[0007] The present invention is further configured as follows: the width of the discharge cavity is 10 mm to 20 mm.

[0008] The present invention is further configured as follows: the induction slag discharge assembly includes a connecting block, a fixed block and a valve member, the connecting block is detachably mounted on the end of the mounting sleeve away from the extruder, the fixed block is fixedly mounted on a side of the connecting block away from the mounting sleeve, a connecting hole connected to a discharge cavity is provided on the connecting block, a slag discharge hole connected to the connecting hole is provided on the fixed block, a slag discharge pipe connected to the slag discharge hole is provided on the fixed block, and the valve member is arranged on the fixed block and located between the slag discharge hole and the slag discharge pipe.

[0009] The present invention is further configured as follows: the valve component includes a fixing frame, a cylinder and a sealing sleeve, the fixing frame is fixed on the fixing block, the cylinder is arranged on the fixing frame with the telescopic end facing the fixing block, and the sealing sleeve is arranged on the telescopic end of the cylinder and is sealingly slidably penetrated between the slag discharge hole and the slag discharge pipe.

[0010] The present invention is further configured as follows: a sensing hole is provided on the connection block, the sensing hole is communicated with the discharge cavity, and the sensing hole is used for installing an external pressure sensor.

[0011] The present invention is further configured as follows: a plurality of first mounting holes for connection are provided at both ends of the mounting sleeve, and a plurality of second mounting holes for connection are provided on the connecting block.

[0012] A method for operating an automatic slag discharge device for a screw extruder, comprising the following steps:

[0013] S1. First, install the installation sleeve at the discharge end of the extruder, so that the extruder screw extends into the filter cavity, and the outer wall of the extruder screw slides against the inner wall of the filter sleeve;

[0014] S2, the molten slurry with waste residue moves into the filter cavity in the installation sleeve as the extruder screw rotates, and enters the discharge cavity through several filter holes on the filter sleeve, and finally is discharged from the discharge pipe on the installation sleeve;

[0015] S3. The waste residue that does not pass through the filter hole continues to move to one side of the induction slag discharge component as the screw rotates. When the waste residue accumulates to the process threshold, the waste residue in the filter cavity is discharged through the induction slag discharge component.

[0016] Compared with the prior art, the beneficial effects obtained are:

[0017] This device is an automatic slag discharge device for a screw extruder, which is mainly used to be installed at the discharge end of the extruder and used in conjunction with the extruder. The device can be effectively installed at the end of the extruder through the installation sleeve, and the filter sleeve set in the installation sleeve can effectively filter the molten slurry passing through. The induction slag discharge component can effectively discharge the waste residue filtered out of the slurry to prevent the waste residue from accumulating on the installation sleeve filter sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 2 It is a schematic cross-sectional diagram of the overall structure of an embodiment of the present invention;

[0020] Figure 3 for Figure 2 A schematic diagram of the structure at A;

[0021] Figure 4 It is a schematic diagram of the connection structure of the present invention with an extruder and a screw.

[0022] In the above drawings: 1. Installation sleeve; 2. Filter sleeve; 3. Filter cavity; 4. Discharge cavity; 5. Filter hole; 6. Discharge pipe; 7. Connecting block; 8. Fixing block; 9. Connecting hole; 10. Slag discharge hole; 11. Slag discharge pipe; 12. Fixing frame; 13. Cylinder; 14. Sealing sleeve; 15. Induction hole; 16. First installation hole; 17. Second installation hole; 18. Extruder; 19. Screw. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Example:

[0025] Reference Figure 1 to Figure 4 The device is an automatic slag discharge device for a screw extruder, comprising a mounting sleeve 1 and a filter sleeve 2 which can be detachably mounted on an extruder 18. Both the mounting sleeve 1 and the filter sleeve 2 are through-set at both ends. Both ends of the mounting sleeve 1 are provided with a plurality of first mounting holes 16 for connection, and external bolts and nuts can be connected and fixed to the extruder 18 through the provision of the first mounting holes 16. A filter cavity 3 is provided in the mounting sleeve 1, and the filter sleeve 2 is provided in the mounting sleeve 1. A discharge cavity 4 is provided between the filter sleeve 2 and the inner wall of the mounting sleeve 1, and the width of the discharge cavity 4 is 10 mm to 20 mm. A plurality of filter holes 5 are provided in the circumferential direction of the side wall of the filter sleeve 2, and the plurality of filter holes 5 are used to connect the filter cavity 3 with the discharge cavity 4. A discharge pipe 6 which is connected with the discharge cavity 4 is provided on the mounting sleeve 1, and the provision of the discharge pipe 6 can facilitate the discharge of the filtered slurry from the mounting sleeve 1.

[0026] like Figure 2 , Figure 3As shown, a detachable induction slag removal assembly is provided on the mounting sleeve 1 and at the end away from the extruder 18. The induction slag removal assembly includes a connecting block 7, a fixing block 8 and a valve member. The connecting block 7 is detachably mounted on the end of the mounting sleeve 1 away from the extruder 18. The connecting block 7 is provided with a plurality of second mounting holes 17 for connection. The second mounting holes 17 and the first mounting holes 16 are matched to complete the fixing of the connecting block 7 by connecting with external bolts and nuts. The fixing block 8 is fixed to the end of the connecting block 7 away from the mounting sleeve 1. On one side, the connection block 7 is provided with a connection hole 9 connected to the discharge cavity 4, the fixed block 8 is provided with a slag discharge hole 10 connected to the connection hole 9, the fixed block 8 is provided with a slag discharge pipe 11 connected to the slag discharge hole 10, and the valve member includes a fixing frame 12, a cylinder 13 and a sealing sleeve 14. The fixing frame 12 is fixed on the fixed block 8, the cylinder 13 is arranged on the fixing frame 12 and the telescopic end faces the fixed block 8, and the sealing sleeve 14 is arranged on the telescopic end of the cylinder 13 and is sealed and slidably penetrated between the slag discharge hole 10 and the slag discharge pipe 11. This arrangement can effectively drive the sealing sleeve 14 on the telescopic end of the cylinder 13 to slide in the slag discharge hole 10 on the fixed block 8 through the cylinder 13, so that the slag discharge hole 10 and the slag discharge pipe 11 are connected or separated, and prevent the continuous slag discharge from affecting the slurry discharge. A sensing hole 15 is provided on the connecting block 7, and the sensing hole 15 is connected to the discharge cavity 4. Through the setting of the sensing hole 15, when in use, an external pressure sensor can be connected in the sensing hole 15 to detect the waste slag located on the side of the connecting block 7 facing the discharge cavity 4. Specifically, through the continuous rotation of the screw 19 on the extruder 18, the filtered waste slag will continue to move toward the connecting block 7. When the pressure received by the pressure detector reaches a certain threshold, the sealing sleeve 14 can be driven by the cylinder 13 to further discharge the waste slag from the connecting hole 9, the slag discharge hole 10 and the slag discharge pipe 11.

[0027] like Figure 4 As shown, an operation method and working principle of an automatic slag discharge device of a screw 19 extruder 18 are as follows:

[0028] First, install the installation sleeve 1 at the discharge end of the extruder 18, so that the screw 19 of the extruder 18 extends into the filter cavity 3, and the outer wall of the screw 19 of the extruder 18 slides against the inner wall of the filter sleeve 2. Specifically, the gap between the screw 19 and the filter sleeve 2 is 0.1mm to 0.5mm.

[0029] Second, the molten slurry in the extruder 18 is continuously moved along with the screw 19 in the filter sleeve 2 , and the slurry is filtered through the filter sleeve 2 by extrusion. The filtered slurry enters the discharge cavity 4 and is further discharged from the discharge pipe 6 .

[0030] Third, the waste residue that does not pass through the filter hole 5 continues to move to one side of the connecting block 7 as the screw 19 rotates. The continuous rotation of the screw 19 will cause the waste residue to continue to accumulate on the connecting block 7. After the pressure sensor inside and outside the connecting hole 9 detects that the waste residue has accumulated on one side of the connecting block 7 to the process threshold, the sealing sleeve 14 slides out of the slag discharge hole 10 through the expansion and contraction of the cylinder 13. The continuous rotation of the screw 19 will cause the accumulated waste residue to pass through the connecting hole 9 in sequence, enter the slag discharge hole 10, and finally be discharged from the slag discharge pipe 11. This device has the advantage of automatic slag discharge without disassembly, greatly improving the convenience of the filtering device and improving production efficiency from the side.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An automatic slag discharge device for a screw extruder, characterized in that: The invention comprises a mounting sleeve (1) and a filter sleeve (2) which are detachably mounted on an extruder (18); a filter cavity (3) is arranged in the mounting sleeve (1); the filter sleeve (2) is arranged in the mounting sleeve (1); a discharge cavity (4) is arranged between the filter sleeve (2) and the inner wall of the mounting sleeve (1); a plurality of filter holes (5) are circumferentially provided on the side wall of the filter sleeve (2); the plurality of filter holes (5) are used to connect the filter cavity (3) with the discharge cavity (4); a discharge pipe (6) connected to the discharge cavity (4) is arranged on the mounting sleeve (1); and a detachable induction slag discharge component is arranged on the mounting sleeve (1) and connected at the end away from the extruder (18).

2. The automatic slag discharge device for a screw extruder according to claim 1, characterized in that: The width of the discharge cavity (4) is 10 mm to 20 mm.

3. The automatic slag discharge device for a screw extruder according to claim 1, characterized in that: The induction slag discharge assembly comprises a connecting block (7), a fixing block (8) and a valve member. The connecting block (7) is detachably mounted on the end of the mounting sleeve (1) away from the extruder (18). The fixing block (8) is fixedly mounted on a side of the connecting block (7) away from the mounting sleeve (1). The connecting block (7) is provided with a connecting hole (9) connected to a discharge cavity (4). The fixing block (8) is provided with a slag discharge hole (10) connected to the connecting hole (9). The fixing block (8) is provided with a slag discharge pipe (11) connected to the slag discharge hole (10). The valve member is arranged on the fixing block (8) and is located between the slag discharge hole (10) and the slag discharge pipe (11).

4. The automatic slag discharge device for a screw extruder according to claim 2, characterized in that: The valve member comprises a fixing frame (12), a cylinder (13) and a sealing sleeve (14); the fixing frame (12) is fixedly mounted on a fixing block (8); the cylinder (13) is mounted on the fixing frame (12) with its telescopic end facing the fixing block (8); and the sealing sleeve (14) is mounted on the telescopic end of the cylinder (13) and is sealingly slidably penetrated between the slag discharge hole (10) and the slag discharge pipe (11).

5. The automatic slag discharge device for a screw extruder according to claim 2, characterized in that: The connection block (7) is provided with a sensing hole (15), the sensing hole (15) is communicated with the discharge cavity (4), and the sensing hole (15) is used to connect and install an external pressure sensor.

6. The automatic slag discharge device for a screw extruder according to claim 2, characterized in that: Both ends of the installation sleeve (1) are provided with a plurality of first installation holes (16) for connection, and the connection block (7) is provided with a plurality of second installation holes (17) for connection.

7. The operating method of the automatic slag discharge device of a screw extruder according to claim 1, characterized in that: Follow these steps: S1. First, install the installation sleeve (1) at the discharge end of the extruder (18), so that the screw (19) in the extruder (18) extends into the filter cavity (3), and the side wall of the screw (19) slides against the inner wall of the filter sleeve (2); S2, the molten slurry containing waste residue moves into the filter cavity (3) in the installation sleeve (1) as the screw (19) rotates, enters the discharge cavity (4) through a plurality of filter holes (5) on the filter sleeve (2), and finally is discharged from the discharge pipe (6) on the installation sleeve (1); S3, the waste residue that does not pass through the filter hole (5) continues to move to one side of the induction slag discharge component as the screw (19) rotates. When the waste residue accumulates to a process threshold, the waste residue in the filter cavity (3) is discharged through the induction slag discharge component.

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