JPH0742769U - Powder feeder - Google Patents

Abstract

(57) [Summary] [Object] To provide a powder feeder capable of smoothly discharging a granular material in a hopper that accommodates a large-capacity granular material with a small-sized, low-power device at a low cost. [Structure] A cylindrical body 4 is provided below a hopper 1 for accommodating powder and granules.
And the bottom surface of the cylindrical body 4 is used as a fixed platen 2.
And a small opening 5 between the side wall of the cylindrical body 4 and the cylindrical body 4.
A horizontal ring-shaped granular material transfer body 9 for receiving the granular material discharged from the opening 5 is arranged on the outer circumference of the stationary platen 2 of FIG. It is rotated by 11, and the powdery or granular material discharge part 12 is provided in the middle of the rotary transfer path of the powdery or granular material transfer body 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a powder feeder for discharging powder particles from a storage chamber (simply referred to as a hopper) such as a silo, container, or tank that stores a large amount of powder particles.

[0002]

[Prior art]

 In the conventional powder feeder, a rotating powder granule transfer plate is provided on the bottom surface of a cylindrical body that communicates with the lower part of the hopper, and the powder granules in the hopper are formed by the grooves, cells and blades of the powder granule transfer plate. The powder and granules are filled in the container, and rotated and discharged from the hopper outside or at a desired position inside the hopper to the outside of the hopper. In the structure of this conventional powder feeder, when the hopper becomes large and a large amount of powder is stored, a large weight of powder acts on the powder transfer board, and the powder moves under the high powder pressure. In addition to having to rotate the body transfer board and requiring a large amount of horsepower, a large thrust force must act on the rotary drive mechanism to be a large, axially resistant mechanism. There was a problem that it was large and costly. In addition, there are problems that it is difficult to rotate, and it is difficult to control the powder feed amount accurately due to the pressure of powder particles.

[0003]

[Problems to be solved by the device]

 The problem to be solved by the present invention is to solve the problem of the conventional powder feeder, and even in the hopper of a large-capacity powder, the powder can be discharged smoothly with a small-sized and low-power device at a low cost. To provide a powder feeder.

[0004]

[Means for Solving the Problems]

 The structure of the present invention which solves such a problem is as follows: 1) The bottom surface of the cylinder communicating with the lower part of the hopper for containing the granular material is used as a fixed plate, and a small opening is provided between the fixed plate and the side wall of the cylinder. A horizontal granular material transfer body that receives the granular material discharged from the opening is rotatably provided on the outer periphery of the fixed plate of the cylindrical body, and the granular material is provided in the middle of the rotary transfer path of the granular material transfer body. Powder feeder characterized in that a body discharge portion is provided 2) The powder feeder according to 1) above, wherein the opening area of the opening is adjustable.

[0005]

[Action]

 In the present invention, the weight of powder in the hopper acts on the fixed plate at the bottom of the cylinder, and the powder on the stationary plate leaks out from the small opening between the side wall of the hopper and the fixed plate. The particles are transferred to the granular material transfer body and are transferred together with the rotation of the granular material transfer body, and are discharged from the granular material discharge section to the outside. In this way, the powder and granule pressure in the hopper does not act directly on the powder and granular material transfer body, and only the slight weight of the powder and granular material leaking from the opening is received. Is significantly reduced to the order of 1 / 10,000. Therefore, the powdery- or granular-material transfer body is small in size, and the powdery or granular material can be smoothly discharged by the driving device having a small horsepower. Further, if the opening area of the opening can be adjusted, it is possible to adjust the powder supply amount and the leaking powdery particles to an appropriate state.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment, FIG. 2 is a vertical cross-sectional view showing a main part of the embodiment, and FIG. 3 is an explanatory view showing another example of a powder / particle transport body. In the figure, 1 is a hopper, 2 is a fixed plate serving as the bottom surface of the cylinder 4, 3 is an arm for supporting the fixed plate on the cylinder 4, 4 is a cylinder, 5 is an opening provided at the lower end of the cylinder 4, and 6 is A lifting cylinder for changing the opening area of the opening, 7 is a cylinder for moving the lifting cylinder 6 up and down, 8 is a connecting rod for moving the lifting cylinder 6 up and down by the cylinder, and 9 is an annular powder having a flat upper surface. Body transfer body, 10 is a rotary frame that supports and rotates the same powder and granular material transfer body 9, 11 is a rotary drive unit using a motor that drives the same rotary frame, 12 is a powder and granular material discharge unit, and 13 is the same powder and granular material A scraper that comes into contact with the upper surface of the granular material transfer body 9 in the body discharge part 12 to scrape off the granular material on the granular material transfer body 9, 14 is a discharge chute, and 15 is a rotational transfer of the granular material transfer body 9. An annular chamber that protects the road, P is a granular material.

In this embodiment, the weight of the powder or granular material P stored in the hopper 1 is directly applied to the fixed platen 2 via the cylindrical body 4 communicating with the lower part thereof, and the fixed platen 2 is powdered. Supports the weight of the granules P. The granular material P near the fixed board 2 leaks from the opening 5 below the lower end of the cylindrical body 4 and moves to the upper surface of the granular material transfer body 9. The amount of the granular material P leaking from the opening 5 is determined by the angle of repose of the granular material P, and the amount of the leakage is larger than the amount of the granular material P in the hopper 1 (several hundred kg to several hundred tons). , Which is significantly smaller than the order of magnitude of 10,000. Therefore, the number of powder particles on the upper surface of the powder / particle transfer body 9 is small, the thrust load applied to the powder / particle transfer body 9 is also reduced to about 1 / 10,000, and the rotation speed is small and the horsepower is small. The drive unit 11 smoothly rotates the powder or granular material, and in the powder or granular material discharging unit 12, the powder or granular material is scraped out by the scraper 13 and discharged to the discharge chute 14. Here, the effective opening area of the opening 5 can be changed by moving the elevating cylinder 6 up and down by the cylinder 7 and the connecting rod 8. As a result, the amount of powder or granules leaking through the opening 5 can be adjusted and the amount of powder supplied can be changed. Further, it is possible to adjust the effective opening area of the opening 5 according to the amount of powder or granular material stored so that a fixed amount of powder can be fed. Further, it is possible to prevent an excessive amount of powder from leaking to the opening 5. Further, it is possible to rotate and transfer the powdery or granular material transfer body 9 with the elevating cylinder 6 lowered and the opening 5 closed.

It should be noted that the powder / particle transport body 9 does not have to be at the same level as the fixed platen 2, and may be at a position lower than the fixed platen 2 as shown in FIG. Further, the method of accommodating the granular material of the granular material transferring body 9 may be simply placing the granular material on a flat plane as in the present embodiment, or the granular material transferring method as in the conventional accommodating method. A method may be used in which a groove is formed in an annular shape on the upper surface of the body 6, the powder or granular material is housed in the groove, and the powder or granular material is discharged from the groove by a scraper inserted into this groove at the powder or granular material discharging portion. Alternatively, the powder / particle carrier 9 has a structure in which blades are radially provided, the blades are rotated on a fixed bottom plate, and the powder accommodated between the blades is moved downward at a position where the bottom plate has a discharge hole. The particulate discharge unit may be designed to discharge. Further, it is also possible to adopt a masu type powder / granular material transport structure.

[0009]

[Effect of device]

 As described above, according to the present invention, the structure of the fixed plate on the bottom surface of the fixed cylindrical body, the opening at the lower end of the cylindrical body, and the granular material transfer body rotating around the outer periphery of the cylindrical body accommodates a large amount of granular material. Even in all hoppers, the compact and small horsepower drive device can smoothly discharge the granular material. Further, the discharge amount of the powder supply can be controlled easily and accurately. If the opening area of the opening can be adjusted, it is possible to adjust the powder supply amount, adjust the opening area according to the amount of powder or granular material, and prevent excessive leakage of powder or granular material.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a main part of the embodiment.

FIG. 3 is an explanatory diagram showing another example of a powdery- or granular-material transport body.

[Explanation of symbols]

 1 Hopper 2 Fixed board 3 Arm 4 Cylindrical body 5 Opening 6 Elevating cylinder 7 Cylinder 8 Connecting rod 9 Powder and granular material transfer body 10 Rotating frame 11 Rotation drive unit 12 Powder and granular material discharging unit 13 Scraper 14 Discharging chute 15 Annular chamber P Powder and granular material body

Claims (2)

[Scope of utility model registration request] 1. A bottom plate of a cylinder communicating with a lower portion of a hopper for containing powder and granules is used as a fixed plate, and a small opening is provided between the fixed plate and a side wall of the cylinder, and a plate of the cylinder is fixed. A horizontal granular material transfer body that receives the granular material discharged from the opening is rotatably provided on the outer periphery of the, and a granular material discharge part is provided in the middle of the rotary transfer path of the granular material transfer body. Characterized powder feeder. 2. The powder feeder according to claim 1, wherein the opening area of the opening is adjustable.