Feeding metal detection device of double-screw extruder

Abstract

The utility model provides a double-screw extruder feeding metal detection device which comprises a shell, a feeding pipe is arranged in the shell, a permanent magnet is arranged in the middle of the feeding pipe and connected with an induction coil arranged on the side face of the feeding pipe, the lower end of the permanent magnet is connected with a discharging pipe, and the lower end of the permanent magnet is connected with a feeding pipe. The lower end of the discharging pipe is communicated with an obliquely-arranged discharging pipe and a discharging port, a discharging valve is arranged in the discharging pipe, a metal object outlet is formed in the tail end of the discharging valve, a separating valve is arranged at the joint of the discharging pipe and the discharging port, and an intelligent limiting switch is arranged on the separating valve. By utilizing the permanent magnet, under the action of an external magnetic field of the induction coil, the permanent magnet is magnetic after being electrified, metal impurities in powder are adsorbed on the permanent magnet, the permanent magnet is demagnetized after being powered off, and metal articles are discharged along the discharge pipe on the inclined surface, so that the occurrence rate of equipment failure is greatly reduced, the production efficiency is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of powder equipment, in particular to a feeding metal detection device for a twin-screw extruder. Background Art

[0002] The twin-screw extruder used in the prior art is likely to have screws and nuts falling into it during production and use due to vibration in the material and during mixing operation. Once mixed into the material and entering the extruder, the rotating screw and screw body will be scrapped, the main motor's stall torque will increase, the motor current will be too high, the main motor will be damaged, the gearbox will be damaged, and the cost of accessories will be high, maintenance will be difficult, and production efficiency will be low. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a twin-screw extruder feeding metal detection device.

[0004] The technical solution of the utility model is achieved as follows: a twin-screw extruder feeding metal detection device comprises a shell, a feed pipe is arranged in the shell, a feed port is arranged on the feed pipe, the feed port is connected to a hopper, a permanent magnet is arranged in the middle of the feed pipe, the permanent magnet is connected to an induction coil arranged on the side of the feed pipe, the lower end of the permanent magnet is connected to a discharge pipe, the lower end of the discharge pipe is communicated with an obliquely arranged discharge pipe and the discharge port, a discharge valve is arranged in the discharge pipe, a metal outlet is arranged at the end of the discharge valve, a separation valve is arranged at the connection between the discharge pipe and the discharge port, an intelligent limit switch is arranged on the separation valve, an induction signal lamp is arranged in the upper middle part of the shell, and a permanent magnet button and a warning lamp are arranged on one side of the shell;

[0005] Preferably, a maintenance door and a maintenance door are provided on the outer side of the shell, and a handle is provided on the maintenance door.

[0006] The beneficial effects of the utility model are as follows: the utility model utilizes a permanent magnet, and under the action of the external magnetic field of the induction coil, the permanent magnet becomes magnetic after power is turned on. When powder falls into and passes through the hole of the permanent magnet, if metal impurities are detected, they are immediately adsorbed on the permanent magnet, the induction signal light flashes, the program system can start the discharge valve to open immediately, the separation valve to close instantly, the permanent magnet is powered off and demagnetized, and the metal objects are discharged along the inclined discharge pipe. After the program is completed, the separation valve automatically opens, and the discharge valve automatically closes to resume normal material discharge production process. When a detection fault occurs, the warning light flashes, the program automatically stops discharging, the separation valve automatically closes, the discharge valve automatically opens, and the extruder automatically stops running. After the fault is eliminated, the program automatically resumes the original production process, and the overall production process is smooth, which greatly reduces the incidence of equipment failures, improves production efficiency, and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0008] Figure 2 It is a left view of the utility model;

[0009] Figure 3 It is a schematic diagram of the permanent magnet of the utility model.

[0010] Parts Description: 1. Shell, 2. Maintenance door, 3. Handle, 4. Hopper, 5. Feed port, 6. Metal object outlet, 7. Permanent magnet button, 8. Warning light, 9. Permanent magnet, 10. Induction coil, 11. Discharge port, 12. Separation valve, 13. Intelligent limit switch, 14. Feed pipe, 15. Discharge pipe, 16. Discharge pipe, 17. Induction signal light, 18. Maintenance door, 19. Discharge valve. DETAILED DESCRIPTION

[0011] 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 of the embodiments.

[0012] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0013] See attached Figure 1-3 A twin-screw extruder feeding metal detection device comprises a shell 1, a feed pipe 14 is arranged in the shell 1, a feed port 5 is arranged on the feed pipe 14, the feed port 5 is connected to a hopper 4, a permanent magnet 9 is arranged in the middle of the feed pipe 14, the permanent magnet 9 is connected to an induction coil 10 arranged on the side of the feed pipe 14, the lower end of the permanent magnet 9 is connected to a discharge pipe 15, the lower end of the discharge pipe 15 is communicated with an obliquely arranged discharge pipe 16 and a discharge port 11, a discharge valve 19 is arranged in the discharge pipe 16, a metal object outlet 6 is arranged at the end of the discharge valve 19, a separation valve 12 is arranged at the connection between the discharge pipe 16 and the discharge port 11, an intelligent limit switch 13 is arranged on the separation valve 12, an induction signal lamp 17 is arranged in the upper and middle part of the shell 1, a permanent magnet button 7 and a warning lamp 8 are arranged on one side of the shell 1; a maintenance door 2 and a maintenance door 18 are arranged on the outer side of the shell 1, and a handle 3 is arranged on the maintenance door 2.

[0014] Specifically, the permanent magnet button 7 is pressed, and the permanent magnet 9 is energized. Under the action of the external magnetic field of the induction coil 10, the permanent magnet 9 is magnetic after being energized. When the powder falls into the hole passing through the permanent magnet 9, if metal impurities are detected, they are immediately adsorbed on the permanent magnet 9, and the induction signal light 17 flashes. The program system can start the discharge valve 19 to open immediately, and the separation valve 12 is closed instantly. At this time, the discharge pipe 15 is connected to the discharge pipe 16, and the discharge pipe 15 is not connected to the discharge port 11. The permanent magnet 9 is powered off and demagnetized, and the metal objects are discharged along the discharge pipe 16 on the inclined surface. After this program is completed, the separation valve 12 automatically opens, and the discharge valve 19 automatically closes. At this time, the discharge pipe 15 is not connected to the discharge pipe 16, and the discharge pipe 15 is connected to the discharge port 11, and the normal unloading production process is restored. When the device detects a fault, the warning light 8 flashes, the program automatically stops unloading, the separation valve 12 automatically closes, the discharge valve 19 automatically opens, and the extruder automatically stops running. After the fault is eliminated, the program automatically restores the original production process.

[0015] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A twin-screw extruder feed metal detection device, comprising a housing (1), wherein a feed pipe (14) is provided in the housing (1), wherein a feed port (5) is provided on the feed pipe (14), wherein the feed port (5) is connected to a hopper (4), and wherein the metal detector comprises: A permanent magnet (9) is provided in the middle of the feed pipe (14), the permanent magnet (9) is connected to an induction coil (10) provided on the side of the feed pipe (14), the lower end of the permanent magnet (9) is connected to a discharge pipe (15), the lower end of the discharge pipe (15) is in communication with an obliquely arranged discharge pipe (16) and a discharge port (11), a discharge valve (19) is provided in the discharge pipe (16), a metal outlet (6) is provided at the end of the discharge valve (19), a separation valve (12) is provided at the connection between the discharge pipe (16) and the discharge port (11), an intelligent limit switch (13) is provided on the separation valve (12), an induction signal lamp (17) is provided in the middle and upper part of the housing (1), and a permanent magnet button (7) and a warning lamp (8) are provided on one side of the housing (1).

2. A twin-screw extruder feed metal detection device as claimed in claim 1, characterized in that A maintenance door (2) and a maintenance door (18) are provided on the outside of the housing (1), and a handle (3) is provided on the maintenance door (2).

Images