Vacuum powder metering tank

Abstract

The utility model relates to the technical field of feeding tanks, in particular to a powder vacuum metering tank. Comprising a metering tank, and the metering tank is provided with a blowback air bag, a weighing sensor, a filtering unit and a pneumatic vibrator. The pneumatic vibrator is arranged at the conical section of the metering tank, and the conical section of the metering tank is also provided with a side stirring mechanism; the side stirring mechanism comprises a rotating motor arranged on the outer wall of the conical section of the metering tank, a solid shaft driven by the rotating motor and penetrating through the conical section of the metering tank, a coupler arranged on the solid shaft, a vertical rotating shaft connected with the coupler and a stirring unit driven by the vertical rotating shaft; the coupler comprises a first bevel gear and a second bevel gear, the first bevel gear is meshed with the second bevel gear, the solid shaft is sleeved with the first bevel gear, and the vertical rotating shaft is sleeved with the second bevel gear. According to the utility model, the problem of smooth discharging in the powder vacuum metering tank is solved, and the side stirring mechanism can effectively prevent bridging of the powder and reduce the condition of material blockage.

Description

Technical Field

[0001] This utility model relates to the field of feeding tank technology, specifically a powder vacuum metering tank. Background Technology

[0002] In many industries such as rubber and plastics, pharmaceuticals, food, and chemicals, negative pressure conveying and replenishment of powders are required. Typically, a vacuum powder hopper and a replenishment hopper with vertical stirring and high / low level indicators are needed to complete the powder feeding, storage, and discharge. However, in many cases, due to space constraints and special process flows, customers require the vacuum powder hopper and replenishment hopper to be integrated. This results in a vacuum powder metering tank, using a weighing sensor instead of a level gauge. However, in this case, vertical stirring cannot be used, and due to the bridging properties of powder, it can cause blockage at the discharge port, preventing smooth discharge.

[0003] Existing vacuum metering tanks for powders employ pneumatic vibrators installed on the outer wall of the conical discharge compartment to facilitate powder discharge. While this addresses some powder clogging issues, the vibrator's effectiveness is limited due to the characteristics of certain materials; in some cases, it even has the opposite effect, compacting the powder and exacerbating clogging. Therefore, determining how to improve existing vacuum metering tanks to resolve clogging issues in the conical discharge compartment is a problem that warrants further investigation. Utility Model Content

[0004] The problem to be solved is to improve the existing powder vacuum metering tank to solve the problem of material blockage in the cone section of the discharge port.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a powder vacuum metering tank, comprising a metering tank, a backflush air manifold, a weighing sensor, a filter unit, and a pneumatic vibrator; the pneumatic vibrator is located at the conical section of the metering tank, and the conical section of the metering tank is also provided with a side stirring mechanism, the side stirring mechanism comprising a rotary motor located on the outer wall of the conical section of the metering tank, a solid shaft driven by the rotary motor and passing through the conical section of the metering tank, a coupling mounted on the solid shaft, a vertical rotating shaft connected to the coupling, and a stirring unit driven by the vertical rotating shaft; the coupling comprises a first bevel gear and a second bevel gear, the first bevel gear and the second bevel gear meshing with each other, the first bevel gear being sleeved on the solid shaft, and the second bevel gear being sleeved on the vertical rotating shaft.

[0006] Preferably, the stirring unit is fixed to the end of the vertical rotating shaft. The stirring unit includes a blade and a scraper located on the blade. The scraper is fitted into the inner wall of the conical section of the metering tank.

[0007] Preferably, the included angle between the axes of the first bevel gear and the second bevel gear is 90°.

[0008] Preferably, the pneumatic vibrator is located on the outer wall of the conical section of the metering tank.

[0009] Preferably, the solid shaft is fitted inside the hollow shaft on the side closest to the rotating motor, and the hollow shaft connects the coupling to the inner wall of the conical section of the metering tank.

[0010] Preferably, a hollow tube is welded to the outer wall of the conical section of the metering tank, and the hollow tube is connected in sequence to a first flange and a flange seat, and the rotary motor is connected to the flange seat.

[0011] Compared with the prior art, this utility model provides a powder vacuum metering tank with the following advantages: This utility model solves the problem of smooth material discharge in the powder vacuum metering tank; the side stirring mechanism can effectively prevent powder bridging and reduce material blockage; the horizontally set stirring motor is externally mounted to avoid powder intrusion and damage; the failure rate of the bevel gear transmission is lower than that of the traditional vertical stirring shaft sealing structure; the blades of the stirring unit directly act on the powder bridging area of ​​the conical section, and together with the scraper, remove the material adhering to the inner wall, solving the stubborn blockage that the pneumatic vibrator cannot handle. Attached Figure Description

[0012] Figure 1 This is a front view of the metering tank of this utility model;

[0013] Figure 2 This is a top view of the metering tank of this utility model;

[0014] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0015] Explanation of reference numerals in the attached drawings: 1. Metering tank; 11. Conical section of metering tank; 12. Hollow tube; 13. First flange; 14. Flange seat; 2. Backflush air manifold; 3. Weighing sensor; 4. Filter unit; 5. Pneumatic vibrator; 6. Side stirring mechanism; 61. Rotary motor; 62. Solid shaft; 612. Hollow shaft; 63. Coupling; 64. First bevel gear; 65. Second bevel gear; 66. Vertical rotating shaft; 67. Stirring unit; 68. Paddle; 69. Scraper; 610. Second flange. Detailed Implementation

[0016] The technical solutions of the present utility model will now be described with reference to the accompanying drawings in the embodiments of the present utility model:

[0017] A side stirring mechanism 6 is added to the existing structure of the powder vacuum metering tank. The side stirring mechanism 6 is set at the discharge cone section, so that the stirring motor drives the stirring rod to rotate through the coupling, which breaks up and loosens the bridged powder. Combined with the vibration effect of the vibrator, the powder is discharged smoothly.

[0018] To address the problems mentioned in the background art, this utility model provides a powder vacuum metering tank, as shown in the figure, comprising a metering tank 1. The metering tank 1 is equipped with a backflush air manifold 2, a weighing sensor 3, a filter unit 4, and a pneumatic vibrator 5. The pneumatic vibrator 5 is located at the conical section 11 of the metering tank and on the outer wall of the conical section 11. The pneumatic vibrator 5 loosens the powder layer by vibration, improving its flowability. The backflush air manifold 2 pulses air into the filter unit 4 to prevent the filter unit 4 from clogging. The weighing sensor 3 monitors the weight of the powder in the metering tank 1 in real time, accurately controlling the feeding / discharging of powder. The filter unit 4 filters dust to prevent contamination of the vacuum system. Since the backflush air manifold 2, the weighing sensor 3, the filter unit 4, and the pneumatic vibrator 5 are all existing structures, their individual structural details will not be described in detail here. The metering tank cone section 11 is also equipped with a side stirring mechanism 6, which includes a rotary motor 61, a solid shaft 62, a coupling 63, a vertical rotating shaft 66, and a stirring unit 67. The rotary motor 61 is located on the outer wall of the metering tank cone section 11 to provide a power source for the side stirring mechanism 6. The external design prevents powder from entering and causing malfunctions. The rotary motor 61 drives the solid shaft 62 to rotate, and the solid shaft 62 transmits the torque of the rotary motor 61 to the coupling 63. The side of the solid shaft 62 closest to the rotary motor 61 is fitted inside the hollow shaft 612, and the hollow shaft 612 connects the coupling 63 to the inner wall of the metering tank cone section 11. The coupling 63 is mounted on the solid shaft 62 to achieve 90° power steering (horizontal to vertical), reducing the difficulty of sealing. The vertical shaft 66 is connected to the coupling 63 and drives the stirring unit 67 to rotate. The stirring unit 67 is connected to the vertical shaft 66. The coupling 63 includes a first bevel gear 64 and a second bevel gear 65, which mesh with each other. The included angle between the axes of the first bevel gear 64 and the second bevel gear 65 is 90°. The first bevel gear 64 is sleeved on the solid shaft 62, and the second bevel gear 65 is sleeved on the vertical shaft 66.

[0019] The mixing unit 67 is fixed to the end of the vertical rotating shaft 66. The mixing unit 67 includes a blade 68 and a scraper 69 located on the blade 68. The scraper 69 is installed in close contact with the inner wall of the metering tank cone section 11. The blade 68 is responsible for rotating and breaking up powder clumps and destroying the bridging structure; the scraper 69 is in close contact with the inner wall of the metering tank cone section 11 (gap ≤ 2mm) to scrape off the adhering powder and eliminate dead corner residue.

[0020] The rotary motor 61 is fixedly mounted on the outside of the conical section 11 of the metering tank as follows: The conical section 11 of the metering tank has an opening corresponding to the output end of the rotary motor 61. A hollow tube 12 is welded to the opening. The side of the hollow tube 12 connecting to the conical section 11 of the metering tank is an inclined surface that mates with the conical end. A first flange 13 is welded to the other end of the hollow tube 12. The first flange 13 is connected to the rotary motor 61 by welding a flange seat 14, thus completing the fixation of the rotary motor 61 and the conical section 11 of the metering tank. A bearing is installed inside the flange seat 14. The output end of the rotary motor 61 passes through the inner ring of the bearing and the side wall of the conical section 11 of the metering tank before connecting to the solid shaft 62. The left side of the solid shaft 62 achieves a sealed connection with the conical section 11 of the metering tank through a skeleton seal. The skeleton seal is existing technology and will not be described in detail. The vertical rotating shaft 66 is connected to the stirring unit 67 via the second flange 610; a hollow shaft 612 is fitted on the side of the solid shaft 62 near the rotary motor 61. The hollow shaft 612 is a hollow shaft fixed on the inner wall of the metering tank cone section 11. The hollow shaft 612 is responsible for connecting the inner wall of the metering tank cone section 11 to the coupling 63, so that the coupling 63 is fixed in the middle of the solid shaft 62. The thinner solid shaft 62 fitted inside the hollow shaft 612 is connected to the output end of the rotary motor 61.

[0021] The side stirring mechanism 6 is triggered, and the rotary motor 61 drives the solid shaft 62 to rotate. The first bevel gear 64 and the second bevel gear 65 convert the horizontal rotation of the solid shaft 62 into vertical rotation, thereby driving the vertical rotating shaft 66 to rotate. The stirring unit 67 rotates under the drive of the vertical rotating shaft 66, which drives the paddle 68 to rotate and disperse the powder. The scraper 69 scrapes off the attached layer on the inner wall. The pneumatic vibrator 5 is started to assist the powder flow. The vibration duration is synchronized with the side stirring mechanism 6 to avoid material blockage in the powder bridging area of ​​the cone-shaped silo.

[0022] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A vacuum metering container for powder, comprising a metering container (1), wherein the metering container (1) is provided with a backflush air manifold (2), a weighing sensor (3), a filter unit (4), and a pneumatic vibrator (5); the pneumatic vibrator (5) is located at the conical section (11) of the metering container, characterized in that: The metering tank cone section (11) is also provided with a side stirring mechanism (6). The side stirring mechanism (6) includes a rotary motor (61) located on the outer wall of the metering tank cone section (11), a solid shaft (62) driven by the rotary motor (61) and passing through the metering tank cone section (11), a coupling (63) set on the solid shaft (62), a vertical rotating shaft (66) connected to the coupling (63), and a stirring unit (67) driven by the vertical rotating shaft (66). The coupling (63) includes a first bevel gear (64) and a second bevel gear (65). The first bevel gear (64) and the second bevel gear (65) mesh with each other. The first bevel gear (64) is sleeved on the solid shaft (62), and the second bevel gear (65) is sleeved on the vertical rotating shaft (66).

2. The powder vacuum metering container according to claim 1, characterized in that: The stirring unit (67) is fixed to the end of the vertical rotating shaft (66). The stirring unit (67) includes a blade (68) and a scraper (69) located on the blade (68). The scraper (69) is fitted to the inner wall of the metering tank cone section (11).

3. The powder vacuum metering container according to claim 1 or 2, characterized in that: The included angle between the axes of the first bevel gear (64) and the second bevel gear (65) is 90°.

4. The powder vacuum metering container according to claim 1 or 2, characterized in that: The pneumatic vibrator (5) is located on the outer wall of the cone section (11) of the metering tank.

5. The powder vacuum metering container according to claim 1, characterized in that: The solid shaft (62) is fitted inside the hollow shaft (612) on the side near the rotary motor (61). The hollow shaft (612) is connected to the coupling (63) and the inner wall of the metering tank cone section (11).

6. The powder vacuum metering container according to claim 1, characterized in that: A hollow tube (12) is welded to the outer wall of the cone section (11) of the metering tank. The hollow tube (12) is connected to the first flange (13) and the flange seat (14) in sequence. The rotary motor (61) is connected to the flange seat (14).

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