Blanking device of ball press machine

Abstract

The utility model relates to the technical field of ball press machines, and particularly discloses a discharging device of a ball press machine. Comprising a hopper, a feeding pipe, a material conveying screw rod, a driving motor, a top cover, a material scraping device and a dust removal device, the feeding pipe is connected to the lower portion of the hopper in a sealed mode, the material conveying screw rod is coaxially and rotationally arranged in the feeding pipe, the top cover covers the hopper, the driving motor is fixedly installed on the top cover, and the upper end of the material conveying screw rod is in transmission connection with an output shaft of the driving motor; a scraping device is fixedly arranged on the upper portion of the material conveying screw in a sleeving mode, a dust removal device is fixedly installed on the top cover, materials accumulated in the hopper can be scraped off from the inner wall through a supporting rod fixedly installed on the material conveying screw, it is guaranteed that powder smoothly falls into the feeding end of the material conveying screw, and it is guaranteed that materials can be continuously supplied to a roller pair below; furthermore, a dust removal device is further arranged, powder flying dust in the hopper can be intercepted, meanwhile, high-pressure air is intermittently introduced into the dust removal bin through a back flushing pipe to clean powder on the filter screen in a back flushing mode, and waste of the powder is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ball press machines, in particular to a feeding device for a ball press machine. Background Art

[0002] In the metal smelting industry, most of the materials used for smelting are powders. The raw materials and additives need to be mixed into a certain proportion of powdered materials, and the powders are pressed into balls of the same diameter using a ball press. The balls are then put into the smelting furnace for smelting, which is more conducive to air flow in the furnace, thereby improving the efficiency of smelting.

[0003] The ball press uses two pairs of rollers with spherical grooves to press balls. During normal operation, the feeding device feeds material into the middle of the two pairs of rollers to ensure that there is material between the two pairs of rollers and that the discharged balls are uniform and complete. However, in actual production, the hopper of the feeding device is not tilted at an angle enough, and the powder is easily stuck in the hopper and cannot be smoothly discharged, resulting in insufficient feeding of the rollers by the feeding device. The balls squeezed out after lack of material between the rollers are loose or incomplete.

[0004] The existing ball press feeding device mostly adopts a rotating feeding screw, which drives the material to be fed by the rotation of the screw. However, the hopper space is large. If the powder material has a fine particle size, it is easy to form accumulation. There may still be a cavity in the screw in the hopper, causing the screw to run idle and thus leading to insufficient feeding to the rollers below. Utility Model Content

[0005] The utility model aims to provide a feeding device for a ball press machine to solve the problems existing in the prior art.

[0006] The utility model is implemented by the following technical scheme: a feeding device of a ball press machine, including a hopper, a feeding pipe, a feeding screw, a driving motor, a top cover, a scraper device and a dust removal device. The hopper is funnel-shaped, and a feeding pipe is sealed and connected below the hopper. A feeding screw is coaxially rotated in the feeding pipe. A top cover is provided above the hopper, and a driving motor is fixedly installed on the top cover. The upper end of the feeding screw is drivingly connected to the output shaft of the driving motor, a scraper device is fixedly sleeved on the upper part of the feeding screw, and a dust removal device is fixedly installed on the top cover.

[0007] Furthermore, the scraper device includes a fixed ring, a support rod and a scraper. The fixed ring is fixedly sleeved on the upper part of the feeding screw, and three groups of support rods are fixedly provided on the fixed ring. A scraper is fixedly installed on the free end of the support rod, and one side end of the scraper is in sliding contact with the inner wall of the hopper.

[0008] Furthermore, each group of support rods of the scraper device is composed of two cylindrical metal rods arranged symmetrically with respect to each axis, and the angle between each group of support rods and the feeding screw decreases successively from top to bottom.

[0009] Furthermore, the scraper is made of soft wear-resistant rubber material, a slot is provided at the free end of the support rod, the scraper is inserted into the slot, a bolt is passed through the support rod, and the bolt passes through the scraper to fix the scraper and the support rod.

[0010] Furthermore, the dust removal device includes a dust removal bin, a filter and a backblowing pipe. The lower end of the dust removal bin is fixedly installed on the top cover, the dust removal bin is connected to the inner cavity of the hopper, a filter is installed in the dust removal bin, the filter is sealed to the inner wall of the dust removal bin, and is sealed to the dust collector pipe at the top of the dust removal bin. A backblowing pipe is provided on the side wall of the dust removal bin, the air inlet of the backblowing pipe is placed above the filter, the backblowing pipe is connected to the high-pressure air source, and an electromagnetic valve is installed between the backblowing pipe and the high-pressure air source.

[0011] The advantages of the utility model are as follows: by fixing a support rod which rotates together with the feed screw on the feed screw in the hopper, the material accumulated in the hopper can be scraped off from the inner wall, ensuring that the powder falls smoothly into the feed end of the feed screw, thereby ensuring that the feed screw can continuously feed the pair of rollers below, reducing the occurrence of low density and incomplete pellets caused by lack of material between the pair of rollers; further, a dust removal device is provided, which can intercept dust from the powder in the hopper and reduce environmental pollution. At the same time, the backflush pipe intermittently passes high-pressure air into the dust removal bin for backflush, which can clean the powder on the filter screen and reduce the waste of powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 This is a schematic diagram of the local structure of the dust removal device.

[0014] In the figure: hopper 1, feeding pipe 2, feeding screw 3, driving motor 4, top cover 5, scraper device 6, dust removal device 7, fixing ring 601, support rod 602, scraper 603, dust removal bin 701, filter screen 702, backblowing pipe 703. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside" and "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, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0017] like Figure 1 As shown: a feeding device of a ball press machine, comprising a hopper 1, a feeding pipe 2, a feeding screw 3, a driving motor 4, a top cover 5, a scraping device 6 and a dust removal device 7. The hopper 1 is funnel-shaped, and the internal accommodating cavity can be used for temporary storage of powder. A feeding pipe 2 is sealed and connected below the hopper 1. The lower end of the feeding pipe 2 is connected to the roller bin of the ball press machine. A feeding screw 3 is coaxially rotated in the feeding pipe 2. A part of the feeding screw 3 is placed in the feeding pipe 2, and a part is placed in the hopper 1. The upper part is an optical axis for transmission. The feeding screw 3 rotates to transfer the material The powder in the hopper 1 is continuously transported to the roller bin of the ball press. A top cover 5 is provided above the hopper 1. A driving motor 4 is fixedly installed on the top cover 5. The upper end of the feeding screw 3 is drivingly connected to the output shaft of the driving motor 4. A scraper device 6 is fixedly sleeved on the upper part of the feeding screw 3. The scraper device 6 includes a fixed ring 601, a support rod 602 and a scraper 603. The fixed ring 601 is fixedly sleeved on the upper part of the feeding screw 3. Three groups of support rods 602 are fixedly provided on the fixed ring 601. Each group of support rods of the scraper device 6 602 is composed of two cylindrical metal rods arranged symmetrically on an axis. The angle between each group of support rods 602 and the feeding screw 3 decreases from top to bottom, so as to ensure that the scrapers 603 installed at the ends of the three groups of support rods 602 can cover the entire inner wall of the hopper 1. The scrapers 603 are fixedly installed at the free ends of the support rods 602. The scrapers 603 are made of soft wear-resistant rubber material. A slot is opened at the free end of the support rods 602. The scrapers 603 are inserted into the slot. Bolts are pierced on the support rods 602. The bolts pass through the scrapers 603 to fix the scrapers. 603 is fixedly connected to the support rod 602, and one side end of the scraper 603 is in sliding contact with the inner wall of the hopper 1; while the driving motor 4 drives the feeding screw 3 to rotate, the three groups of support rods 602 also rotate together in the hopper 1, and the scraper 603 is driven by the support rod 602 to slide along the inner wall of the hopper 1, and the material attached to the inner wall of the hopper 1 is scraped off. The scraper 603 is made of soft and wear-resistant rubber material and can fit closely with the inner wall of the hopper 1, so as to better scrape off the powder on the inner wall of the hopper 1, thereby solving the problem of powder accumulation.

[0018] like Figure 2As shown: a dust removal device 7 is fixedly installed on the top cover 5; the dust removal device 7 includes a dust removal bin 701, a filter 702 and a back-blowing pipe 703. The lower end of the dust removal bin 701 is fixedly installed on the top cover 5. The dust removal bin 701 is communicated with the inner cavity of the hopper 1. A filter 702 is installed in the dust removal bin 701. The filter 702 is sealed to the inner wall of the dust removal bin 701 and is sealed to the dust collector pipe at the top of the dust removal bin 701. When working, the top cover 5 and the hopper 1 form a closed environment to prevent the dust generated by the falling powder from spreading. The dust collector pipe can provide negative pressure to collect the dust in the hopper 1. Most of the dust passes through the filter 702 and is filtered by the filter. 702 is intercepted, but the effective area of ​​the filter 702 is small and the dust holding capacity is small. Therefore, a back-blowing pipe 703 is connected to the side wall of the dust removal bin 701, and the air inlet of the back-blowing pipe 703 is placed above the filter 702. The back-blowing pipe 703 is connected to the high-pressure air source, and a solenoid valve is installed between the back-blowing pipe 703 and the high-pressure air source. The solenoid valve is connected to a timing controller, and the solenoid valve is controlled to open at regular intervals. The back-blowing pipe 703 back-blows the high-pressure air into the dust removal bin 701 and above the filter 702, so that the material retained in the filter 702 falls back into the hopper 1. The dust removal device 7 can ensure that the dust of the powder is effectively collected and the waste of the powder can be reduced.

Claims

1. A pelletizing machine feeding device, characterized in that: The invention comprises a hopper (1), a feeding pipe (2), a feeding screw (3), a driving motor (4), a top cover (5), a scraping device (6) and a dust removal device (7). The hopper (1) is funnel-shaped. A feeding pipe (2) is sealed and connected to the bottom of the hopper (1). A feeding screw (3) is coaxially rotatably arranged in the feeding pipe (2). A top cover (5) is arranged above the hopper (1). A driving motor (4) is fixedly mounted on the top cover (5). The upper end of the feeding screw (3) is drivingly connected to the output shaft of the driving motor (4). A scraping device (6) is fixedly sleeved on the upper part of the feeding screw (3). A dust removal device (7) is fixedly mounted on the top cover (5).

2. A ball press feeding device according to claim 1, characterized in that: The scraper device (6) comprises a fixed ring (601), a support rod (602) and a scraper (603); the fixed ring (601) is fixedly sleeved on the upper part of the feeding screw (3); three groups of support rods (602) are fixedly mounted on the fixed ring (601); a scraper (603) is fixedly mounted on the free end of the support rod (602); one side end of the scraper (603) is in sliding contact with the inner wall of the hopper (1).

3. A ball press feeding device according to claim 2, characterized in that: Each group of support rods (602) of the scraper device (6) is composed of two cylindrical metal rods arranged symmetrically with respect to each axis, and the angle between each group of support rods (602) and the feeding screw (3) decreases from top to bottom.

4. A ball press feeding device according to claim 3, characterized in that: The scraper (603) is made of a soft wear-resistant rubber material. A slot is provided at the free end of the support rod (602). The scraper (603) is inserted into the slot. Bolts are provided on the support rod (602). The bolts pass through the scraper (603) to fix the scraper (603) to the support rod (602).

5. A ball press feeding device according to any one of claims 1 to 4, characterized in that: The dust removal device (7) comprises a dust removal bin (701), a filter screen (702) and a back-blowing pipe (703). The lower end of the dust removal bin (701) is fixedly mounted on the top cover (5). The dust removal bin (701) is connected to the inner cavity of the hopper (1). A filter screen (702) is installed in the dust removal bin (701). The filter screen (702) is sealed to the inner wall of the dust removal bin (701). The top of the dust removal bin (701) is sealed to the dust collector pipeline. A back-blowing pipe (703) is provided in communication with the side wall of the dust removal bin (701). The air inlet of the back-blowing pipe (703) is located above the filter screen (702). The back-blowing pipe (703) is connected to a high-pressure gas source. A solenoid valve is installed between the back-blowing pipe (703) and the high-pressure gas source.

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