JPH024941Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a powder charging device for a powder transport tank.

2. Description of the Related Art A device shown in FIG. 1 is conventionally known as a powder charging device provided in a transportation tank for loading powder and granular materials such as bulk cement. In this device, an intake tube 2 is attached to the ceiling wall 1 by penetrating through the ceiling wall 1 of the tank, and an intake tube 2 is attached to the periphery of the intake tube 2.
A hatch 3 for opening and closing the upper opening surface of the tank is provided so as to be freely raised and folded, and a tube bag 4, which is longer than the intake tube 2, is attached to the lower part of the intake tube 2 inside the tank. This tube bag 4 is fitted into the outer circumference of the lower end of the intake tube 2, and is attached to the intake tube 2 by being tightened with a band 5 from the outside of the fitted tube bag 4.

By the way, in order to load powder into the tank mentioned above,
As shown in Fig. 2, the lower end of the tube bag 4 is rolled up and taken out from the intake tube 2, and after this is connected to the take-out tube 6 of the powder silo, the powder and granules are transferred from the take-out tube 6 into the tank. We are trying to do this by investing in

By the way, the tube bag 4 needs to be replaced with a new one from time to time. Conventionally, the tube bag 4 is secured with a band to the outer circumferential surface of the lower end of the intake tube 2. You have to come in and do the work. For this reason, the person performing the replacement work has to remove and attach the cylinder bag while being covered in powder inside the tank, which not only complicates the work but also poses a risk of health problems for the worker. It was hot.

This idea was made to solve the above problems, and consists of an expansion ring made of a plurality of arc-shaped connecting rods and a turnbuckle part corresponding to the chord of the arc, and this expansion ring is placed inside the intake tube. By arranging an expansion ring and attaching it to the intake cylinder by pressing the bag cylinder against the circumferential groove on the inner circumferential surface of the intake cylinder with this expansion ring, it is possible to operate the tank from outside. It is an object of the present invention to provide a powder and granular material feeding device which makes it possible to exchange tube bags, facilitates the tube bag exchange work, and allows an operator to carry out the exchange work without getting covered in powder. do.

This invention will be explained below based on embodiments shown in the drawings.

Figures 3 to 5 show an embodiment of this invention, and parts that are the same as those of the conventional example shown in Figure 1 are given the same reference numerals, and their explanations are omitted or simplified. do. In the figure, 10 indicates the intake cylinder,
The portion of this intake tube 10 inside the tank is formed shorter than the conventional intake tube 2, and its lower end 10a is located slightly below the ceiling wall 1 of the tank. Further, a base 11 is provided on the side of the intake tube 10,
An arm 1 hinged to the upper end of this base 11
A hatch 13 is attached to 2, and the hatch 13 can be raised and lowered freely, and the upper end opening surface of the intake tube 10 can be opened and closed by the hatch 13. In addition, a screw shaft 13a is provided at the center of the hatch 13.
A moving block 14 having a screw hole opened on the lower surface is screwed into the upper part of the screw shaft 13a, and a handle 15 is fixed to the outer peripheral surface of the moving block 14. Furthermore, a fixed plate 16 having a center hole in the peripheral part formed at the bottom of the moving block 14
are fitted, and a locking rod 17 is bolted to the lower surface of this fixing plate 16 facing the opposite side to the base 11 side, and the side of the intake tube 10 on which the base 11 is provided. A locking stand 18 having a locking portion 18a is provided on the opposite side, and by hooking the locking rod 17 to the locking portion 18a and turning the handle 15, the moving block 14 is moved along the screw shaft 13a. By moving and pressing the locking rod 17 against the locking portion 18a, the hatch 13 with the opening surface of the intake tube 10 closed can be pressed against the intake tube 10.

On the other hand, a pair of ring members 19, 1 are provided on the inner circumference of the intake cylinder 10 slightly above the ceiling wall 1 of the tank.
9 are attached vertically at intervals, a circumferential groove 20 is formed between each ring member 19, 19, and a powder/granular material is placed inside the transport tank in the intake cylinder 10. A tube bag 4 is inserted to cover the silo's take-out tube. This tube bag 4 is fixed to the intake tube 10 by pressing the outer circumference of the upper opening side of the tube bag 4 against the inner surface of the circumferential groove 20 by an expansion ring 21 described below. A rubber ring 22 is attached to the periphery of the opening on the free side of the tube bag 4 (periphery of the lower opening), and the rubber ring 22 closes the tube bag while covering the lower end of the take-out tube of the silo with this opening. 4 is pressed against the outer circumferential surface of the take-out cylinder of the silo.

The expansion ring 21 includes a pair of semicircular connecting rods 21A, 21A, and
It consists of a pair of cylindrical nuts 21B, 21B that connect the connecting rods 21A, 21A by screwing into threaded portions 21a formed at both ends of the rods 21A, 21A. In addition, a connecting rod 21A having a threaded portion 21a is formed.
Each end of the ring is positioned on a straight line corresponding to a pair of parallel chords of a circle including the connecting rod 21A, and when the expansion ring 21 is fitted into the circumferential groove 20 of the intake cylinder 10, The cylindrical nut 21B is arranged to come out of the circumferential groove 20 as shown in FIG.

Note that the threaded portions 21 at both ends of the connecting rod 21A
a, 21a are threaded in opposite directions, and the threaded portions 21a, 21a of the connecting rods 21A, 21A connected by the cylinder nut 21B are also threaded in opposite directions, so that each cylinder nut 21
By turning B and 21B, each connecting rod 2
The distance between 1A and 21A can be increased or decreased. That is, each threaded portion 21a, 21a and the cylindrical nut 21B constitute a turnbuckle portion 21c.

Next, the operation of this device configured as described above will be explained.

When it becomes necessary to replace the tube bag 4, the operator first opens the hatch 13, turns the tube nut 21B inside the intake tube 10, and removes the connecting rods 21A, 21A.
The connecting rods 21A, 21A are removed from the circumferential groove 20, and the tube bag 4 and expansion ring 21 are taken out of the intake tube 10. Next, take in a new tube bag and tube 1.
0, position the upper opening periphery of the tube bag slightly above the circumferential groove 20, and place the remaining part of the tube bag into the tank. Next, insert the expansion ring 21 into the tube bag.
Insert and position it inside the circumferential groove 20, turn the cylindrical nut 21B to widen the interval between the connecting rods 21A, 21A, and insert the connecting rods 21A, 21A into the circumferential groove 20.
is inserted to press the outer circumference of the tube bag against the inner surface of the circumferential groove 20 to fix the tube bag. For the above work, the worker can work from above the ceiling wall 1 of the tank and does not need to go inside the tank, so the worker does not inhale powder or become covered in powder, and the work environment is is better than before. Further, since the expansion ring can be removed and attached only by operating the turnbuckle portion, the tube bag can be easily replaced.

In the above embodiment, the expansion ring 21 was configured with two connecting rods 21A and two cylindrical nuts 21B, but the expansion ring 21 may be configured with three or more connecting rods and three or more cylindrical nuts. may be configured. That is, it is also possible to use arc-shaped connecting rods that form a circle when three or more are connected.

As explained above, this invention forms a circumferential groove on the inner circumferential surface of the intake cylinder of a powder transport tank, and connects a plurality of arc-shaped connecting rods in an annular shape with a turnbuckle portion corresponding to the chord of the arc. They are connected to form an expansion ring, and this expansion ring is fitted into the circumferential groove with the cylinder bag in between, thereby fixing the cylinder bag to the circumferential groove, so that the turnbuckle can be attached to the inner wall of the intake cylinder. Since it protrudes further inward, it can be easily operated from the open side of the transport tank. Therefore, by operating the turnbuckle from outside the tank above the intake tube and removing the expansion ring, the tube bag can be easily removed, and the tube bag can be inserted into the intake tube and expanded. Put the ring into the tube bag,
The tube bag can be attached by operating the turnbuckle and expanding the expansion ring. Furthermore, since all of the above work can be done outside the tank, replacing the cylinder bag is easier than in the past, which required entering the tank. Furthermore, since there is no need to enter the tank, the worker will not be covered in powder, and the working environment will be better than before. Furthermore, since the tube bag is fixed by being fitted into the circumferential groove around its entire circumference, no gaps are created and misalignment does not occur. There is no need to perform any reinforcement or other processing on the cylinder bag, and it can be used as is.

[Brief explanation of the drawing]

Figures 1 and 2 show an example of a conventional charging device, with Figure 1 being a cross-sectional view, Figure 2 being a cross-sectional view showing how the powder silo is connected to the take-out tube, and Figures 3 to 3. Fig. 8 shows an embodiment of this invention, Fig. 3 is a sectional view, Fig. 4 is an enlarged sectional view of the intake tube, Fig. 5 is an exploded plan view of the expansion ring, and Fig. 6 is a sectional view. FIG. 7 is a plan view of the turnbuckle portion, FIG. 7 is a cross-sectional view showing the mounting portion of the tube bag, and FIG. 8 is a cross-sectional view showing the position of the turnbuckle portion when the tube bag is attached. 1... Ceiling wall, 4... Tube bag, 6... Removal tube, 1
0... Intake tube, 20... Peripheral groove, 21... Expansion ring, 21A... Connection rod, 21B... Cylinder nut, 21C... Turnbuckle portion.

Claims (1)

[Scope of utility model registration request] An intake tube is attached to the ceiling wall of the powder transport tank by penetrating the ceiling wall, and a circumferential groove is formed on the inner peripheral surface of the intake tube. A cylinder bag, which is connected with one end over a retrieval cylinder of a body silo, etc., connects a plurality of arc-shaped connecting rods in an annular manner with a turnbuckle portion corresponding to the chord of the arc, into the circumferential groove of the expansion ring. A powder and granular material charging device for a powder and granular material transport tank, characterized in that the other end is fixedly attached to the circumferential groove by fitting.