JP3363073B2 - Air slide device for powder storage tank - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method for fluidizing powder and granular material stored in a powder and granular material storage tank and increasing the pressure in the tank to discharge the powder and granular material to the outside. The present invention relates to an air slide device for a powdery material storage tank. 2. Description of the Related Art In a conventional air slide apparatus, an outer peripheral edge and an inner peripheral edge of a breathable cloth canvas are fixed to a concave bowl-shaped bottom wall formed at a tank bottom, and the canvas and the tank bottom wall are fixed. When air is supplied to the air chamber, the air is ejected through the canvas into the tank to fluidize the granular material. However, the above structure has a drawback that the canvas is loosened downward by the load of the granular material contained in the tank, so that the air chamber is narrowed, so that air cannot be supplied to the entire air chamber and the granular material does not flow smoothly. is there. [0003] In order to solve the above-mentioned problems, an air slide apparatus disclosed in Japanese Utility Model Publication No. 50-32953 has been provided. In the air slide device, an outer peripheral edge and an inner peripheral edge of a perforated plate formed of a single plate formed into a funnel by forming a number of small holes are fixed to a bottom wall, and a canvas is stretched on an upper surface of the perforated plate. It is configured to be installed. This allows the canvas to be supported by the perforated plate, so that the canvas can be prevented from sagging downward due to the load of the granular material contained in the tank. [0004] Generally, a manhole is formed in the upper portion of the powdery material storage tank so that the powdery material can be charged and stored in the tank. This manhole has a smaller diameter than the bottom wall. Therefore, a perforated plate having substantially the same diameter as the bottom wall cannot be put in the tank. Therefore, there is a problem that even if the perforated plate is broken, it cannot be replaced with a new perforated plate. [0005] In general, when a canvas is used for a certain period of time, clogging occurs in the granular material, and it is necessary to perform cleaning or replacement work. At this time, the worker enters the tank and performs work.However, since the inside of the tank is provided with an inclined plate that is inclined toward the bottom of the tank, the operator rides on a perforated plate that is inclined more gradually than the inclined plate and exchanges. Do the work. However, since the perforated plate only supports the inner and outer peripheries and does not support the intermediate portion of the perforated plate at all, there is a problem that the perforated plate is deformed downward or damaged by the operator's own weight during the operation. . Therefore, the present invention provides an air slide device for a powdery and granular material storage tank which allows replacement of a perforated plate and reliably prevents the perforated plate from being deformed and damaged even when an operator gets on it. Things. According to the present invention, a funnel-shaped perforated plate having a plurality of small holes is provided at the bottom of a powdery material storage tank, and a gas permeable plate is provided on the perforated plate. In the air / slide device for a powdery / granular material storage tank in which a canvas is stretched, the perforated plate is formed by at least two divided plates radially, and at least one of left and right side edges of each of the divided plates one support portion Ru extends granular material holding tank bottom side in
Form the body and support the split plate radially with the support.
This is a feature of the present invention. Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a powder / particle storage tank. The powder / particle storage tank 1 (hereinafter referred to as a tank) has a manhole 2 which is opened and closed by a manhole cover at a center portion of a ceiling wall thereof. The powdery and granular material is charged and accommodated in 1. In the lower part of the tank 1, there are formed three front / middle / rear-portion discharge portions 3 spaced apart in the longitudinal direction, and each of the discharge portions 3 has an elbow shape. A curved discharge pipe 4 penetrates the tank 1 and is fixed to the side wall of the tank 1, and the powder in the tank 1 is discharged to the outside through the discharge pipe 4 by air. I have. Each of the granular material discharge portions 3 comprises a sloped plate 5 inclined in a funnel shape at the bottom of the tank 1 and a bottom wall 6 formed in a concave bowl shape below the sloped plate 5. A powder discharge unit 3 is provided on the bottom wall 6 with a powder container 7 and an air pipe 8.
Air slide device 1 that is divided into an air chamber 9 through which air flows.
0 is laid. Hereinafter, the air slide device 10
As shown in FIGS. 2 and 3, the air slide device 10 is a perforated plate formed by combining four fan-shaped divided plates 12 having a plurality of small holes 11 and radially divided in a funnel shape. 13 and an air-permeable canvas 14 stretched on the upper surface of the perforated plate 13. The inner periphery of the outer edge 15 of the bottom wall 6 is shown in FIG.
An annular groove 16 is formed as shown in FIG.
The upper edge of each split plate 12 is placed on the lower surface of the ring, and a ring 17 is placed on the upper edge of the split plate 12 with the upper edge of the canvas 14 interposed therebetween.
It is fitted to. An adjusting bracket 18 is provided on the ring 17, and the ring 17 is expanded outward by the adjusting bracket 18 so as to be resilient. Reference numeral 19 denotes a seal rubber fixed to the annular groove 16, which fills a gap 27 formed between the canvas 14 and the annular groove 16 sandwiched between the rings 17, and securely fixes the canvas 14. A pedestal 20 fixed to the center of the bottom wall 6
As shown in FIG. 6, a step 21 is formed on the outer peripheral edge of the upper surface, and the inner edge of each split plate 12 is placed on the step 21.
On this, the clamping plate 22 is clamped and fixed by clamping bolts 24 with the inner edge of the canvas 14 sandwiched via packing 23. As a result, the dividing plate 12 and the canvas 14 are fixed to the bottom wall 6. At this time, since the perforated plate 13 is divided into four dividing plates 12, when replacing, each dividing plate 1
2 can be put into the tank 1 from the manhole 2 and the divided plates 12 can be combined in the tank 1 to form the perforated plate 13, so that the perforated plate 13 can be easily replaced. As shown in FIG. 4, a support portion 25 bent downward is integrally formed on both left and right side edges of each of the divided plates 12, and an inner portion of the support portion 25 conforms to the shape of the bottom wall 6. The tapered portion 26 is formed.
6 and the outer portion abut against the bottom wall 6 so that the split plate 26
Is to be supported. A gap 27 is provided between the support 25 and the bottom wall 6.
The air passes through the air chamber 9 by passing the air through the air chamber 7. FIGS. 7 to 9 show another embodiment of the supporting portion. FIG. 7 shows a case where a supporting portion 30 having a horizontal surface 29 is integrally formed on one side edge of a dividing plate 28, and the horizontal surface 29 is formed.
, The other side edge of the adjacent split plate 28 is placed and supported. FIG. 8 shows that the lower edge of the support portion 31 is adapted to the shape of the bottom wall 6 so that the entire lower edge supports the dividing plate 32, and a plurality of passage holes 33 are formed in the middle portion thereof. By passing air through the passage hole 33,
Air is distributed throughout the air chamber 9. FIG.
A plurality of cutout grooves 35 are formed in the lower edge of the support portion 34, and when the air passes through the cutout grooves 35, the air reaches the entire air chamber 9. In this embodiment, the perforated plate is constituted by four divided plates. However, the perforated plate may be constituted by two or more divided plates, and the divided plates may be inserted into the tank through manholes. . Further, although the supporting portion is formed by bending the side edge of the divided plate, the supporting member may be welded to the side edge of the divided plate to form the supporting portion. The operation of the present invention will now be described with the above-described structure. First, air is supplied from the air pipe 8 into the air chamber 9. Then, the air spreads to the entire air chamber 9 through the gaps 27 between the divided plates 12, and at the same time, passes through the small holes 11 and the canvas 14 of the divided plate 12 and is blown into the storage chamber. As a result, the granular material is fluidized and the pressure in the granular material storage chamber 7 is increased, and the fluidized granular material is sent to the outside of the tank 1 through the discharge pipe 4. By the way, when the discharging operation is performed for a certain period,
Since the canvas 14 is clogged, it is necessary to perform an exchange operation. At this time, the worker enters the tank 1 from the manhole 2 at the upper part of the tank 1 and rides on the perforated plate 13 to exchange the canvas 14, but the perforated plate 13 is supported on the bottom wall by the support portions 25 at the inner and outer peripheral edges and both side edges. Because it is supported by 6,
Even if the operator rides on the perforated plate 13, there is no downward deformation or breakage. When replacing the perforated plate 13, each divided plate 12 is put into the tank 1 through the manhole 2 and
Since the perforated plate 13 can be formed by combining the divided plates 12 in the inside, the work of replacing the perforated plate 13 can be easily performed. As described above, according to the present invention, the perforated plate is composed of a plurality of divided plates and the support is integrally formed on each divided plate. Thus, the perforated plate can be formed, and the operation of replacing the perforated plate can be easily performed. Also, the left and right sides of the split plate
Since the supporting portion provided on the side edge supports the bottom of the tank, it is possible to reliably prevent the perforated plate from being deformed and damaged even when an operator rides on the perforated plate and works when replacing the canvas. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall view showing a granular material tank having an air slide device of the present invention. FIG. 2 is an enlarged view of a main part. FIG. 3 is an AOA sectional view of FIG. 2; FIG. 4 is a perspective view showing a split plate of the present invention. FIG. 5 is an enlarged view of a portion B in FIG. 3; FIG. 6 is an enlarged view of a portion C in FIG. 3; FIG. 7 is a perspective view showing another embodiment of the present invention. FIG. 8 is an enlarged view of a main part showing another embodiment of the present invention. FIG. 9 is an enlarged view of a main part showing another embodiment of the present invention. [Description of Signs] 1 Powder / particle storage tank 10 Air slide device 11 Small hole 12 Dividing plate 13 Perforated plate 14 Canvas 25 Support portion

Continuation of front page (56) References JP-A-52-15071 (JP, A) JP-A-1-270914 (JP, A) JP-A-55-98789 (JP, U) JP-B-51-49109 (JP, A) , B2) JP-B-55-21959 (JP, B2) US Patent 3,099,498 (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65D 88/00-90/66 B65G 53/00 -53/66

Claims (1)

(57) [Claim 1] A funnel-shaped perforated plate having a plurality of small holes is provided at the bottom of a powdery material storage tank, and a gas permeable canvas is placed on the perforated plate. In the air slide device for a powder-particle storage tank that is stretched, the perforated plate is formed of divided plates that are radially divided into at least two, and at least one of the left and right side edges of each divided plate is provided. the support portion integrally formed Ru extends granular material holding tank bottom, at the support portions
An air slide device for a powder-and-particle storage tank configured to radially support a divided plate .