Hopper capable of adsorbing ferromagnetic impurities and preventing caking from blocking feed opening

Abstract

The utility model relates to the field of plastic processing, in particular to a hopper capable of adsorbing ferromagnetic impurities and preventing caking from blocking a feed opening. Comprising a hopper body, the upper portion of the hopper body is cylindrical, the lower portion of the hopper body is in a circular truncated cone shape, a material shortage sensor is arranged at the position, above a discharging opening, of the lower portion of the hopper body, and a magnetic grid plate with the grid size smaller than that of the discharging opening is arranged at the position, above the material shortage sensor, of the lower portion of the hopper body. The magnetic grid plate comprises a plurality of transverse stainless steel battens and a plurality of longitudinal magnetic bars, and the stainless steel battens are connected to the magnetic bars at a certain inclination angle. When material particles are added into the hopper from the material feeding opening, ferromagnetic impurities in the material particles are attracted to the periphery when passing through grids through the arrangement of the magnetic grid plate; and if the particles are agglomerated, the particles can block the upper part of the grid, the material shortage sensor above the feed opening senses the material shortage of the hopper, and the alarm and the shutdown are triggered, so that the material shortage production is prevented. And by arranging the material suction monitoring control device, continuous feeding of the materials is ensured.

Description

Technical Field

[0001] The utility model relates to the field of plastic processing, in particular to a hopper which can absorb ferromagnetic impurities and prevent agglomeration from blocking a feed outlet. Background Art

[0002] At present, screw extrusion equipment is generally used for extrusion of plastic particles. Ferromagnetic impurities are occasionally mixed into the pellets used for extrusion due to the processing, transportation and addition of raw materials. The impurities are added to the extrusion equipment through the hopper. Because they cannot be melted, the rotation of the screw during the extrusion process drives the impurities to contact the barrel, which can easily cause damage to the screw and barrel. If the surface of the extruded plastic contains the above impurities, it will also cause spark alarms.

[0003] In addition, due to the poor fluidity of the material and the flying of dust, the material will stick, accumulate and precipitate. If the particles are agglomerated, they will be blocked at the discharge port. However, the shortage sensor above the discharge port still senses that there is material in the hopper, and thus does not trigger the alarm and shutdown, resulting in shortage of material production. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a hopper which can absorb ferromagnetic impurities and prevent agglomeration from blocking a feed outlet.

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

[0006] A hopper capable of absorbing ferromagnetic impurities and preventing agglomerates from clogging a feed port, comprises a hopper body, wherein the upper portion of the hopper body is cylindrical, and the lower portion is truncated cone-shaped, the lower portion is provided with a material shortage sensor above the feed port, the lower portion is provided with a magnetic grid plate with a grid size smaller than the feed port above the material shortage sensor, the magnetic grid plate comprises a plurality of transverse stainless steel strips and a plurality of longitudinal magnetic bars, the stainless steel strips being connected to the magnetic bars at a certain inclination angle.

[0007] Furthermore, the magnetic bar is a neodymium iron boron magnetic bar.

[0008] Furthermore, the shapes of the two ends of the stainless steel strip match the inner side wall of the lower part.

[0009] Furthermore, the magnetic grid plate is circular.

[0010] Furthermore, a material delivery port is provided at the top of the hopper body, and a material suction monitoring and control device is provided at the material delivery port.

[0011] Furthermore, the material suction monitoring and control device includes a counterweight block, a weight connected to the counterweight block through a supporting rotating rod, and a proximity switch that senses contact with the weight. The supporting rotating rod passes through the inside of the material feeding port so that the counterweight block and the weight are located on both sides of the material feeding port; the supporting rotating rod is fixedly connected to a gravity valve plate in the material feeding port for opening and closing the upper feeding port.

[0012] The advantages of the utility model are: when the particles are added to the hopper from the material delivery port, the ferromagnetic impurities in the particles are adsorbed around the mesh when passing through the mesh; if the particles are agglomerated, they will be blocked above the mesh, and the material shortage sensor above the discharge port will sense the lack of material in the hopper, triggering an alarm and stopping the machine to prevent production due to lack of material. By setting a suction monitoring and control device, the material is ensured to be continuously fed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 Schematic diagram of the structure of the magnetic grid plate.

[0016] Figure 3 It is a structural schematic diagram of the suction monitoring and control device.

[0017] The numbers in the figure are: hopper body 100, material shortage sensor 101, material delivery port 102, magnetic grid plate 1, the stainless steel strips 11, magnetic rod 12, material suction monitoring control device 2, counterweight block 21, L-shaped supporting rotating rod 22, weight 23, proximity switch 24, gravity valve plate 25. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The technical solution of the utility model is as follows:

[0021] See also Figure 1 and Figure 2 As shown, the utility model is a hopper which can absorb ferromagnetic impurities and prevent agglomerates from clogging a feed port, comprising a hopper body 100, wherein the upper portion of the hopper body 100 is cylindrical, and the lower portion is truncated, and the lower portion is provided with a shortage sensor 101 above the feed port, and a magnetic grid plate 1 having a grid size smaller than that of the feed port is fixedly installed above the shortage sensor 101, and the magnetic grid plate 1 comprises a plurality of transverse stainless steel strips 11 and a plurality of longitudinal magnetic bars 12, and the stainless steel strips 11 are connected to the magnetic bars 12 at a certain inclination angle.

[0022] The stainless steel strips 11 can disperse the material blocks. The material blocks falling vertically are knocked down by the stainless steel strips 11 under the action of gravity, thereby reducing the agglomeration of the material particles. The stainless steel strips 11 are tilted (10°-45°) so that the material blocks falling vertically and not easily dispersed are blocked above the grid and will not slide down the grid.

[0023] The magnetic grid plate 1 is composed of magnetic bars 12 and stainless steel strips 11 arranged in a crisscross pattern.

[0024] In a specific embodiment, the magnetic bar 12 is a neodymium iron boron magnetic bar having excellent magnetic properties.

[0025] The shapes of the two ends of the stainless steel strip 11 match the inner side wall of the lower part, and the magnetic grid plate 1 is circular, so that the connection between the magnetic grid plate 1 and the hopper is more stable.

[0026] Specifically, the magnetic grid plate 1 is assembled and fixed by passing the magnetic rods 12 through the perforated stainless steel strips 11, and the grid size of the magnetic grid plate 1 should be smaller than the feed opening.

[0027] In a specific embodiment, a material delivery port 102 is provided at the top of the hopper body 100 , and a material suction monitoring and control device 2 is provided at the material delivery port 102 .

[0028] like Figure 3As shown, the material suction monitoring and control device 2 includes a counterweight block 21, a weight 23 connected to the counterweight block 21 through an L-shaped supporting rotating rod 22, and a proximity switch 24 that senses contact with the weight 23. The supporting rotating rod 22 passes through the inside of the material feeding port 102, so that the counterweight block 21 and the weight 23 are located on both sides of the material feeding port 102; the supporting rotating rod 22 is fixedly connected in the material feeding port 102 with a gravity valve plate 25 for switching the upper discharge port.

[0029] The counterweight block 21 and the weight 23 are both fixed on the L-shaped support rotating rod 22. The weight 23 is located at the other end of the long cross bar of the L-shaped support rotating rod 22 and is eccentrically connected to the rotating rod 22 so that the weight can press the proximity switch 24 when it rotates, so that the proximity switch 24 is activated.

[0030] When the upper hopper is not full of material, the gravity valve plate 25 closes the upper discharge port, and the weight of the counterweight block 21 presses down, driving the supporting rotating rod 22 to rotate, thereby driving the weight 23 to press the proximity switch 24, and the power is turned on to start sucking the material; when the hopper is full, the material presses against the gravity valve plate 25, pushing the gravity valve plate 25 open, and the counterweight block 21 cannot fall, then the proximity switch 24 is closed, and the suction of the material stops.

[0031] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A hopper capable of absorbing ferromagnetic impurities and preventing agglomeration from blocking a feed outlet, comprising a hopper body, wherein the upper portion of the hopper body is cylindrical and the lower portion is truncated, and a material shortage sensor is provided above the feed outlet at the lower portion, characterized in that: The lower part is provided with a magnetic grid plate with a grid size smaller than the feeding port above the material shortage sensor, and the magnetic grid plate includes a plurality of transverse stainless steel strips and a plurality of longitudinal magnetic bars, and the stainless steel strips are connected to the magnetic bars at a certain inclination angle.

2. The hopper capable of absorbing ferromagnetic impurities and preventing agglomeration from blocking the feed outlet as claimed in claim 1, characterized in that: The magnetic bar is a neodymium iron boron magnetic bar.

3. The hopper capable of absorbing ferromagnetic impurities and preventing agglomeration from blocking the feed outlet as claimed in claim 1, characterized in that: The shapes of the two ends of the stainless steel strip match the inner side wall of the lower part.

4. The hopper capable of absorbing ferromagnetic impurities and preventing agglomeration from blocking the feed outlet as claimed in claim 1, characterized in that: The magnetic grid plate is circular.

5. The hopper capable of absorbing ferromagnetic impurities and preventing agglomeration from blocking the feed outlet as claimed in claim 1, characterized in that: A material delivery port is provided on the top of the hopper body, and a material suction monitoring and control device is provided on the material delivery port.

6. The hopper capable of absorbing ferromagnetic impurities and preventing agglomeration from blocking the feed outlet as claimed in claim 5, characterized in that: The material suction monitoring and control device includes a counterweight block, a weight connected to the counterweight block through a supporting rotating rod, and a proximity switch that senses contact with the weight. The supporting rotating rod passes through the inside of the material feeding port so that the counterweight block and the weight are located on both sides of the material feeding port; the supporting rotating rod is fixedly connected to a gravity valve plate in the material feeding port for opening and closing the upper feeding port.

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