JPS6147375A - Bridging formation preventive device in powdered and granular body storage tank - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The crosslinking phenomenon of the contents in a storage tank due to gravity discharge for storing powder and granules occurs at various locations depending on the shape of the tank and the properties of the contents, but it is generally observed in many cases. However, there are bridges near the outlet of the bottom hopper, and bridges formed on the inner wall surface of the tank when the contents of the center of the storage tank above the hopper outlet are drained out.

One of the well-known methods for breaking these bridges is to break the bridge above the hopper outlet, and to eliminate clogging, a beam (1) stretched over the hopper (1) as shown in Fig.
11) A rod (12) is hung down from the hopper so that it can swing freely, and a vibration motor (9) from outside the hopper is used to shake the field (12) via a rod (8) pin-connected to the lower part of the rod to prevent bridging. How to or.

A vibration motor is attached to a part of the hopper and the outer surface of the side plate of the tank.
There are methods to prevent crosslinking using the vibration.

The method using a swinging rod installed above the hopper outlet is effective in clogging the area above the hopper outlet, but it is not effective against bridging on the tank wall. In the case of tanks using thin steel plates, the steel plates vibrate and the vibrations can be transmitted to the contents, but in the case of concrete tanks, vibrations can be transmitted to the contents. In addition, even if the tank is made of steel plates, if the plate thickness is thick and rusty, it is difficult to cause the steel plate to resonate, so if the capacity of the vibration motor is increased, Attach the motor (A large local force is applied to the tank wall, which may cause the motor to fall off.)

When using a vibration motor, the position and shape of the bridge inside the tank cannot be determined from the outside of the tank, so if the vibration motor is not installed in an appropriate position or is used in an inappropriate manner, the contents may become trapped and cause problems. May form strong crosslinks.

To prevent bridging, it is effective to shake off the surface of the content forming the bridging from the bottom, but in the method of applying vibration from the outside of the tank using a vibration motor, the content is powder and granules, so It has vibration absorption properties, and vibrations are not effectively transmitted to the inner surface of the bridge.Bridge formation occurs at various heights within the tank, so to break the bridge at that location, a long rod must be swung. Although the crosslinks can be effectively broken no matter what height the crosslinks occur, the long rods are easily damaged by the enormous force caused by the movement of the contents when the bridges collapse.

The present invention relates to a new crosslinking prevention device that solves these problems.

Next, embodiments of the present invention will be described with reference to the drawings. Figure 2 (1)
(2) is a part of the silo hopper, (2) is a silo tank wall, (3) is a steel pipe forming a part of the device of the present invention, and (4) is an elastic joint that bendably connects the steel pipe (3). Consists of rusty springs.

In this way, a large number of steel pipes are connected by elastic bodies, and each of these steel pipes is attached to the inner surface of the tank wall (2) via a support (5) and a pin (6) so that it can swing freely.Because of this structure, the connecting rod vibrates. The lower end of this connecting rod is connected to a rod (8) that can penetrate the tank wall by means of a screw, and the rod is connected to a vibration motor (8) installed outside the tank. When the vibration from the vibration motor (8) slides the rod (8) back and forth, this force swings the steel pipe (3) at the bottom, and this force is transmitted to the top one after another, swinging each steel pipe. . Note that a sliding joint may be used as the joint of the steel pipe.If a vibrating body configured in this way is buried in the contents, the vibrating body will be long, so if a bridging phenomenon occurs,
As shown in FIG. 3, it penetrates the bridge surface (10) from the bottom.

When 4HtJJ is applied to such a vibrating body, the bridge begins to collapse from the vibrating body on the bridge surface, and a cavity is gradually created around the vibrating body from the bottom to the top, and the circumferential force of the bridge forming the bridge is reduced. The balance is disrupted and the crosslinking phenomenon disappears.

Furthermore, when used in a large storage tank cross-section, multiple rows of multi-node vibrators configured as described above can be provided along the inner wall of the powder storage tank, so that the bridging phenomenon can be more effectively eliminated.

In this way, vibration can be transmitted directly to the crosslinked surface, which is effective because the crosslink can be broken from the bottom using the weight of the contents; In order to effectively transmit the vibration, the effect can be increased without affecting the height at which the crosslinking phenomenon occurs, and the vibrating body is made of a steel pipe with a shape that reduces resistance due to the movement of the contents, and the structure is supported at multiple points. It is possible to create a strong structure that can withstand the force exerted by the contents on the vibrating body when the bridge collapses and the contents are discharged.

[Brief explanation of the drawing]

Figure 1 is a partial cross-sectional side view of a conventional clogging prevention device. FIG. 2 is a partial cross-sectional side view of the present invention; FIG. 3 is a partially sectional side view showing the state of use of the present invention; (1) Hopper (2) Tank wall (3) M tube (4) IAl sex joint (5) Support (6) Bottle (7) Pin (8) Rod (8) Vibration motor (10) Crosslinked surface (11) Beam (12) Rod

Claims (1)

[Claims] A crosslinking prevention device characterized in that a plurality of steel pipes are bendably joined to form a multi-jointed body, and the steel pipe portion is swingably supported on the inner wall of a powder storage tank.