PVB (polyvinyl butyral) feeding and filtering device

Abstract

The utility model relates to the technical field of hoppers, in particular to a PVB (polyvinyl butyral) feeding and filtering device. The device comprises a hopper provided with a feeding port and a discharging port, and a first magnetic attraction assembly and a second magnetic attraction assembly which are sequentially arranged in the hopper in the direction from the feeding port to the discharging port. The first magnetic attraction assembly comprises two magnetic attraction plates which are oppositely arranged, the first side edges of the two magnetic attraction plates are hinged to the inner wall of the hopper, the main body parts of the two magnetic attraction plates are connected with the inner wall of the hopper through elastic pieces, and a buffering material opening is formed between the second side edges of the two magnetic attraction plates; and the second magnetic suction assembly comprises a magnetic suction filter screen. The magnetic suction plate is arranged above the magnetic suction filter screen, the magnetic suction plate has a reciprocating vibration effect, the flow speed of materials passing through the magnetic suction filter screen can be reduced, the materials can be elastically spread out, metal impurities are exposed and not wrapped, and therefore the metal impurities are more easily adsorbed and removed at the magnetic suction filter screen.

Description

Technical Field

[0001] This utility model relates to the field of hopper technology, and in particular to a PVB feeding and filtering device. Background Technology

[0002] PVB film is a reprocessable material. The strips cut during the production process will be reused by cutting / crushing. During the cutting and crushing process, the film and metal (such as cutting blades) rub against each other at high intensity, causing some metal powder or metal particles to enter the machine along with the material for processing, which has a huge impact on the machine's lifespan and product data.

[0003] To remove metallic impurities from rubber compounds, patent document CN204488012U discloses an extruder feed hopper capable of adsorbing metal particles. The hopper includes a feed hopper body with a feed inlet at the top and a discharge outlet at the bottom. The cross-sectional area of ​​the feed hopper body gradually decreases from the feed inlet to the discharge outlet. The feed hopper body contains at least two layers of magnetic frames, each layer parallel to the others. The edges of the magnetic frames abut against the inner wall of the feed hopper body. Each magnetic frame comprises a metal tube made of hard magnetic material, welded in a crisscross pattern. The metal tube has an internal cavity containing a magnet. The cross-section of the metal tube is annular.

[0004] Current technologies typically employ magnetic filters, where metallic impurities are adsorbed the moment the material passes through, resulting in a short adsorption time. However, if the material feed rate is too high, or if the metallic impurities are encapsulated by non-magnetic materials, they may pass directly through the magnetic filter before being adsorbed, leading to insufficient adsorption and affecting the filtration effect. Utility Model Content

[0005] The present invention aims to solve the above problems by providing a PVB feeding and filtering device that can fully adsorb metal impurities.

[0006] The technical solution of this utility model is to provide a PVB feeding and filtering device, including a hopper with an inlet and an outlet, and a first magnetic suction assembly and a second magnetic suction assembly arranged sequentially in the hopper along the direction from the inlet to the outlet; the first magnetic suction assembly includes two magnetic suction plates arranged opposite each other, each magnetic suction plate including a first side edge near the inlet, a second side edge opposite to the first side edge, and a main body located between the first side edge and the second side edge; the first side edges of the two magnetic suction plates are respectively hinged to the inner wall of the hopper, and the main bodies of the two magnetic suction plates are respectively connected to the inner wall of the hopper through elastic members, and a buffer inlet is formed between the second side edges of the two magnetic suction plates; the second magnetic suction assembly includes a magnetic filter screen.

[0007] As a preferred embodiment of this invention, the magnetic plate and / or magnetic filter is a permanent magnet.

[0008] As a preferred embodiment of this invention, the magnetic plate and / or magnetic filter is an electromagnet.

[0009] As a preferred embodiment of this utility model, the hopper is provided with a rotating shaft, and the first side edge is disposed on the rotating shaft; the end of the rotating shaft extends out of the hopper to form a control end.

[0010] As a preferred embodiment of this utility model, the control end is provided with a handle, and the outer wall of the hopper is provided with a fixing part for fixing the handle.

[0011] As a preferred embodiment of the present invention, the magnetic filter screen has a circular cross-section and a toothed ring is provided on the outer ring of the magnetic filter screen; the second magnetic assembly further includes a plurality of gears meshing with the toothed ring and a driving component for driving the gears to rotate.

[0012] As a preferred embodiment of the present invention, the hopper includes an outer shell and an inner shell, and an installation cavity is formed between the outer shell and the inner shell for mounting the gear and the drive component. The inner shell is provided with an opening through which the side edge of the gear ring and the magnetic filter can pass.

[0013] As a preferred embodiment of this invention, the surface of the gear ring is provided with a lubricating coating.

[0014] As a preferred embodiment of the present invention, the hopper has a rectangular cross-section, and the magnetic suction plate further includes a third side edge and a fourth side edge that are adjacent to both the first side edge and the second side edge, and the third side edge and the fourth side edge abut against the inner wall of the hopper respectively.

[0015] As a preferred embodiment of the present invention, the discharge port includes a main discharge port and a secondary discharge port, and the hopper is further provided with a guide plate for closing the main discharge port or the secondary discharge port.

[0016] The beneficial effects of this utility model are:

[0017] 1. In this application, a magnetic plate is provided above the magnetic filter screen. First, the magnetic plate also has the function of adsorbing metal impurities, and the dual adsorption with the magnetic filter screen improves the filtration effect of metal impurities. Second, the magnetic plate is hinged and provided with elastic elements. When the weight of the material on it changes, the magnetic plate has a reciprocating vibration effect, which can reduce the flow rate of the material through the magnetic filter screen and can elastically spread the material, so that the metal impurities are exposed and not covered, thereby making it easier for the metal impurities to be adsorbed and removed at the magnetic filter screen.

[0018] 2. In some embodiments, the magnetic filter screen can be reciprocated by a gear ring and gear structure, so as to shake off non-magnetic impurities on the magnetic filter screen, reduce the clogging of the magnetic filter screen, and further improve its filtration effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a PVB feeding and filtering device;

[0020] Figure 2 This is a top view of the second magnetic suction component of a PVB feeding and filtering device;

[0021] In the figure: hopper 1, feed inlet 11, discharge outlet 12, outer shell 13, inner shell 14, first magnetic suction assembly 21, magnetic suction plate 211, elastic element 212, rotating shaft 213, second magnetic suction assembly 22, magnetic suction filter 221, gear ring 222, gear 223, driving element 224. Detailed Implementation

[0022] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] A PVB feeding and filtering device, such as Figure 1 As shown, the hopper 1 includes a feed inlet 11 and a discharge outlet 12, and a first magnetic attraction component 21 and a second magnetic attraction component 22 are sequentially arranged inside the hopper 1 along the direction from the feed inlet 11 to the discharge outlet 12. Typically, the feed inlet 11 is located at the top of the hopper 1 and the discharge outlet 12 is located at the bottom of the hopper 1. In use, the material enters from the feed inlet 11 and falls under its own gravity. It is attracted by the first magnetic attraction component 21 and the second magnetic attraction component 22 in the inner cavity of the hopper 1, thus removing the metal impurities inside. Finally, the non-magnetically attracted material falls from the discharge outlet 12 into the downstream equipment.

[0024] In this embodiment, the hopper 1, from top to bottom, consists of a filtering chamber, a gathering chamber, and a discharging chamber. The inlet 11 is located in the filtering chamber, and the outlet 12 is located in the discharging chamber. The filtering chamber can be prismatic or cylindrical, with the first magnetic suction component 21 and the second magnetic suction component 22 disposed within it for magnetic filtration. The gathering chamber can be an inverted frustum or an inverted truncated cone shape, used to gather the material. The discharging chamber can be prismatic or cylindrical, used to discharge the material. In this embodiment, the filtering chamber is a quadrangular prism, meaning its cross-section is rectangular, and both the gathering chamber and the discharging chamber are quadrangular prisms.

[0025] The above describes the vertical structure of hopper 1. The horizontal structure of hopper 1 is unrestricted. In this embodiment, to facilitate the subsequent installation and use of the second magnetic assembly 22, further adjustments were made to hopper 1: such as... Figure 1 As shown, the hopper 1 includes an outer shell 13 and an inner shell 14, with an installation cavity formed between the outer shell 13 and the inner shell 14. The top and bottom of the outer shell 13 are connected to the top and bottom of the inner shell 14, respectively.

[0026] The first magnetic attraction component 21 is disposed within a prism-shaped filter media chamber. The first magnetic attraction component 21 includes two opposing magnetic attraction plates 211, such as... Figure 1 As shown, both magnetic suction plates 211 include a first side edge near the feed inlet 11, that is, the upper side edge, and a second side edge opposite to the first side edge, that is, the lower side edge, and a main body located between the first side edge and the second side edge. The first side edge of one magnetic suction plate 211 is hinged to the left inner wall of the hopper 1, and the portion of its main body near the second side edge is connected to the left inner wall by an elastic member 212; the first side edge of the other magnetic suction plate 211 is hinged to the right inner wall of the hopper 1, and the portion of its main body near the second side edge is connected to the right inner wall by an elastic member 212; a buffer feed inlet is formed between the second side edges of the two magnetic suction plates 211.

[0027] The hinge method is not limited; for example, in some implementations, such as... Figure 1 As shown, a rotating shaft 213 is provided inside the hopper 1. The two ends of the rotating shaft 213 along its length are rotatably connected to the front and rear inner walls of the hopper 1, respectively. The first side edge of the magnetic suction plate 211 is connected to the rotating shaft 213, allowing the magnetic suction plate 211 to rotate hingedly. In some embodiments, the end of the rotating shaft 213 can be extended, passing through the inner shell 14 and the outer shell 13, and extending outside the hopper 1 to form a control end. The operator can then manually or electrically control the rotation of the magnetic suction plate 211 inside the hopper 1 via the control end. In some embodiments, the control end is provided with a handle for easy gripping by the operator. In some embodiments, the outer wall of the hopper 1 is provided with a fixing part for securing the handle, so that after the rotating shaft 213 drives the magnetic suction plate 211 to rotate at an appropriate angle, that angle is fixed. For example, after controlling the magnetic suction plate 211 to rotate to fit against the inner wall of the hopper 1, the handle is fixed with the fixing part to prevent it from rebounding under the action of the elastic member 212. The method of fixing the handle is not limited. For example, in some embodiments, the fixing part includes a threaded hole provided on the outer wall of the hopper 1 and a screw, while the handle is provided with a through hole; when the handle is rotated to the point where its through hole corresponds to the threaded hole, the screw can be threaded through the through hole and threaded into the threaded hole.

[0028] The magnetic suction plate 211 is used to receive materials. In some embodiments, to prevent materials from falling through the gap between the magnetic suction plate 211 and the inner wall of the hopper 1, the magnetic suction plate 211 further includes a third side edge and a fourth side edge adjacent to both the first and second side edges. Figure 1 The front and rear side edges of the hopper; the third and fourth side edges abut against the front and rear inner walls of the hopper 1, respectively.

[0029] When the first magnetic suction component 21 is in use, the material is fed onto the surface of the two magnetic suction plates 211. The material slides down the inclined magnetic suction plates 211, and some of the metal impurities inside are attracted and fixed by the magnetic suction plates 211. The remaining material is also buffered and slowed down. At the same time, when the weight of the material on the magnetic suction plate 211 is greater than the elastic force of the elastic element 212, it will cause the elastic element 212 to contract and the second side edge to rotate downward, thereby expanding the buffer opening to allow the material to pass through. As the material passes through and the material on the magnetic suction plate 211 decreases, the pressing effect on the elastic element 212 gradually decreases, and the elastic element 212 will gradually rebound and the second side edge to rotate upward, thereby reducing the buffer opening and reducing the material passing through. As the feed inlet 11 continuously feeds, this process is repeated, and the magnetic suction plate 211 exhibits reciprocating vibration, which can vibrate and spread the material on it to further separate metal impurities and non-magnetic materials.

[0030] The second magnetic suction component 22 includes a magnetic suction filter 221. Material passing through the buffer inlet falls onto the magnetic suction filter 221, and metal impurities are subjected to secondary adsorption and filtration as they pass through the magnetic suction filter 221. The main purpose of the magnetic suction filter 221 is to separate metal impurities, rather than large-particle materials; therefore, its mesh size is not limited and only needs to be moderate.

[0031] In some embodiments, the magnetic filter 221 is fixedly or detachably installed inside the hopper 1 and is fixed in place during use. For example, the inner shell 14 has an opening, into which the side edge of the magnetic filter 221 can be inserted.

[0032] In other implementations, to improve filtration efficiency, such as Figure 1 and Figure 2 As shown, the magnetic filter 221 has a circular cross-section, and its outer ring is provided with a toothed ring 222. The second magnetic assembly 22 also includes several gears 223 that mesh with the toothed ring 222, and a drive component 224, such as a motor, for driving the gears 223 to rotate. The motor can rotate forward and reverse. The toothed ring 222, gears 223, and the output shaft of the drive component 224 are made of non-magnetic materials to avoid being affected by the magnetic attraction of the magnetic filter 221.

[0033] When using, follow Figure 2 In the direction of rotation, the drive unit 224 controls the gear 223 to rotate clockwise, which in turn drives the magnetic filter 221 to rotate counterclockwise via the gear ring 222; conversely, when the drive unit 224 controls the gear 223 to rotate counterclockwise, the magnetic filter 221 can be driven to rotate clockwise via the gear ring 222. Based on this, the magnetic filter 221 can reciprocate on the horizontal plane, shaking off non-magnetic impurities from the magnetic filter 221, reducing clogging, and further improving its filtration effect.

[0034] Since the magnetic filter 221 is circular and the hopper 1 has a rectangular cross-section, therefore... Figure 2 As shown, the area of ​​the magnetic filter 221 should be larger than the cross-section of the inner cavity of the hopper 1, i.e. the inner cavity of the inner shell 14. Preferably, the magnetic filter 221 is the outer circle of the inner cavity of the hopper 1, so as to ensure that a part of the magnetic filter 221 will cover the inner cavity of the hopper 1 during the rotation process.

[0035] During installation, gear 223 and drive component 224 can be placed in the mounting cavity between outer shell 13 and inner shell 14 of hopper 1. Inner shell 14 has an opening that allows the toothed ring 222 and magnetic filter 221 to pass through the side edge of the inner cavity of hopper 1. After the toothed ring 222 reaches the mounting cavity, it meshes with gear 223. At this time, the toothed ring 222 and magnetic filter 221 partially overlap on the lower inner wall of the opening. Since the toothed ring 222 and magnetic filter 221 need to rotate, in order to ensure smooth rotation, at least the surface of the toothed ring 222 near the discharge port 12, i.e., the lower surface, is provided with a lubricating coating to reduce friction with the lower inner wall of the opening. Regarding the magnetic filter 221: In some embodiments, the thickness of the toothed ring 222 can be greater than the thickness of the magnetic filter 221. When the toothed ring 222 overlaps the lower inner wall of the ring opening, there is a gap between the lower surface of the side edge of the magnetic filter 221 and the lower inner wall of the ring opening, which does not affect rotation. In other embodiments, the thickness of the toothed ring 222 is the same as the thickness of the magnetic filter 221, and the side edges of both the toothed ring 222 and the magnetic filter 221 overlap the lower inner wall of the ring opening. In this case, a lubricating coating, such as a polytetrafluoroethylene coating, can be applied to the warp and weft surfaces of the magnetic filter 221. This not only reduces friction with the lower inner wall of the ring opening but also reduces the adhesion and clogging of non-magnetic materials on the magnetic filter 221.

[0036] The surfaces of the toothed ring 222 and the magnetic filter 221 near the feed inlet 11, i.e., the upper surface and the inner wall of the ring opening, can have gaps that do not affect the rotation of the toothed ring 222 and the magnetic filter 221. In some embodiments, a sealing ring can also be provided on the inner wall of the ring opening, and a lubricating coating is provided on the upper surface of the toothed ring 222 and the warp and weft surfaces of the magnetic filter 221, which abut against the sealing ring.

[0037] The magnetic source of the magnetic plate 211 and the magnetic filter 221 is unrestricted. In some embodiments, both the magnetic plate 211 and the magnetic filter 221 are permanent magnets, that is, both the magnetic plate 211 and the magnetic filter 221 are made directly from permanent magnets. After they adsorb metal impurities, operators need to manually or mechanically peel them off and remove them, or directly replace them with new magnetic plates 211 and magnetic filters 221.

[0038] In other embodiments, the magnetic plate 211 can be configured as an electromagnet, meaning the magnetic plate 211 is hollow and filled with an electromagnet. When the electromagnet is energized, the magnetic plate 211 has a magnetic attraction effect; when the power is off, it no longer has the magnetic attraction effect, allowing metal impurities on it to fall off. In this case, the magnetic plate 211 can be rotated by the aforementioned rotating shaft 213, causing the metal impurities on it to fall onto the magnetic filter screen 221 and be cleaned together with the magnetic filter screen 221.

[0039] In some embodiments, the magnetic filter 221 is also an electromagnet. In some embodiments, like the magnetic suction plate 211, the radial and latitudinal tubes constituting the magnetic filter 221 can be hollow and filled with electromagnets. In other embodiments, the magnetic filter 221 can be designed as a metal filter and electrically connected to an electromagnetic generator. When the electromagnetic generator is energized, the metal filter becomes magnetic; when the power is turned off and the magnetic filter 221 loses its magnetism, the metal impurities adsorbed on it and the metal impurities detached from the magnetic suction plate 211 can fall to the discharge port 12 and be collected and removed. In embodiments where the magnetic filter 221 has a toothed ring 222 and is connected to the gear 223 and the drive member 224, the reciprocating oscillation of the magnetic filter 221 can also accelerate the detachment of metal impurities.

[0040] In some embodiments, to avoid secondary mixing of non-magnetic materials and metallic impurities at the discharge port, the discharge port 12 includes a main discharge port and a branch discharge port, used to discharge non-magnetic materials and metallic impurities respectively. Specifically, the discharge pipe of the hopper 1 used to form the discharge chamber is a quadrangular prism, with an opening on one side and a branch pipe connected to it. The bottom of the discharge pipe is the main discharge port, and the bottom of the branch pipe is the branch discharge port. Simultaneously, the hopper 1 is also provided with a guide plate for closing the main discharge port or the branch discharge port. The lower edge of the guide plate is hinged to the connection between the discharge pipe and the branch pipe, the upper edge is a free end, and the front and rear edges abut against the front and rear inner walls of the discharge pipe, respectively. Figure 1 As shown in the dotted line, by controlling the rotation of the guide plate so that its upper edge abuts against the right wall of the discharge pipe, the main discharge port can be closed and the metal impurities can be guided to the branch pipe; as shown in the solid line, by controlling the rotation of the guide plate so that its upper edge abuts against the inner wall of the branch pipe, the branch discharge port can be closed, ensuring that non-magnetic materials flow to the main discharge port.

[0041] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A PVB feeding and filtering device, characterized in that: It includes a hopper (1) with a feed inlet (11) and a discharge outlet (12), and a first magnetic suction component (21) and a second magnetic suction component (22) arranged sequentially in the hopper (1) along the direction from the feed inlet (11) to the discharge outlet (12). The first magnetic suction assembly (21) includes two magnetic suction plates (211) arranged opposite to each other. Each of the two magnetic suction plates (211) includes a first side edge near the feed inlet (11), a second side edge opposite to the first side edge, and a main body located between the first side edge and the second side edge. The first side edges of the two magnetic suction plates (211) are respectively hinged to the inner wall of the hopper (1), and the main bodies of the two magnetic suction plates (211) are respectively connected to the inner wall of the hopper (1) through an elastic member (212). A buffer feed inlet is formed between the second side edges of the two magnetic suction plates (211). The second magnetic component (22) includes a magnetic filter (221).

2. The PVB feeding and filtering device according to claim 1, characterized in that: The magnetic plate (211) and / or magnetic filter (221) are permanent magnets.

3. The PVB feeding and filtering device according to claim 1, characterized in that: The magnetic plate (211) and / or magnetic filter (221) are electromagnets.

4. The PVB feeding and filtering device according to claim 1, characterized in that: The hopper (1) is provided with a rotating shaft (213), and the first side edge is provided on the rotating shaft (213); the end of the rotating shaft (213) extends out of the hopper (1) to form a control end.

5. A PVB feeding and filtering device according to claim 4, characterized in that: The control terminal is provided with a handle, and the outer wall of the hopper (1) is provided with a fixing part for fixing the handle.

6. The PVB feeding and filtering device according to claim 1, characterized in that: The magnetic filter (221) has a circular cross-section, and the outer ring of the magnetic filter (221) is provided with a toothed ring (222). The second magnetic attraction assembly (22) also includes a plurality of gears (223) meshing with the gear ring (222) and a drive member (224) for driving the gears (223) to rotate.

7. A PVB feeding and filtering device according to claim 6, characterized in that: The hopper (1) includes an outer shell (13) and an inner shell (14), and an mounting cavity is formed between the outer shell (13) and the inner shell (14) for mounting the gear (223) and the drive unit (224). The inner shell (14) is provided with an opening through which the side edge of the gear ring (222) and the magnetic filter (221) can pass.

8. A PVB feeding and filtering device according to claim 7, characterized in that: The surface of the gear ring (222) is provided with a lubricating coating.

9. A PVB feeding and filtering device according to claim 1, characterized in that: The hopper (1) has a rectangular cross-section. The magnetic suction plate (211) also includes a third side edge and a fourth side edge that are adjacent to both the first and second side edges. The third side edge and the fourth side edge abut against the inner wall of the hopper (1) respectively.

10. A PVB feeding and filtering device according to claim 1, characterized in that: The discharge port (12) includes a main discharge port and a branch discharge port, and the hopper (1) is also provided with a guide plate for closing the main discharge port or the branch discharge port.

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