JPS5920379Y2 - rotor spray machine - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a rotor type spraying machine.

As a device for spraying materials such as mortar, furnace material, concrete, etc., a rotor with many cylindrical holes arranged around the periphery is attached to the bottom of the hopper, and the rotation of the rotor causes the material in the hopper to flow into the cylindrical holes (channels). A structure in which the material in the tube hole is filled sequentially, and when the rotor reaches the discharge port stationary at the bottom on the other side, the material in the tube hole is discharged to the discharge port by compressed air blown from above. It has been known.

In this so-called rotor-type spraying machine, the compressed air inlet for discharge is always open on the top surface of the rotor, so if compressed air leaks from the upper and lower contact surfaces of the rotor, it will not be possible to smoothly discharge materials. I can't do it.

Therefore, in this type of spraying machine, rubber seal plates with the same outer diameter as the rotor are fixed to the bottom surface of the hopper and the top surface of the fretum, and supports are set up on several frames outside the rotor. A bracket-shaped part extending from the outer periphery of the hopper is placed on this abutment, and by tightening it to the abutment with a spring and a push bolt, the upper and lower rubber seal plates are brought into contact with the upper and lower surfaces of the rotor, thereby sealing the rotating rotor. I was trying to figure it out.

However, in this type of structure, the rubber seal plate is large and requires the use of many expensive materials, and even if a part of it is damaged, it must be replaced entirely, and the sealing mechanism, including the abutment, must be replaced. The drawback is that the cost is high due to the complexity.

Moreover, with this sealing method, the rubber seal plate is mechanically tightened using springs and push bolts at several locations around the rotor's outer circumference, so it is difficult to bring the entire rubber seal plate into contact with the rotor with uniform surface pressure. If the rubber seal plate or the friction plate on the top and bottom of the rotor wears out, or if they are polished and reassembled, fluctuations in surface pressure or deviation may occur, resulting in leakage of compressed air. In order to prevent this from occurring, it is necessary to perform tightening adjustment or retightening, which has the disadvantage of not being easy to use since this operation requires a high degree of skill.

The present invention was developed through research to eliminate the above-mentioned drawbacks of the conventional technology.It has a simple and compact structure, and does not require complicated adjustment operations to maintain the seals above and below the rotor in good condition at all times. The aim is to provide a rotor-type spraying machine that can be used.

For this purpose, the present invention attaches a groove-shaped block so as to fit around a part of the peripheral edge of the rotor from the radial direction, and provides a compressed air duct for discharge in this block, and also provides a compressed air duct for discharge on the block. A ring-shaped rubber seal piece is attached and pressed from the back with compressed air to bring it into close contact with the upper and lower surfaces of the rotor.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figures 1 to 4 show a rotor-type spraying machine according to the present invention, where 1 is a hopper for storing materials to be sprayed, and is a frame or housing (hereinafter referred to as the frame).
It is supported on top of 2 with a lower plate 3.

The rotor 4 is located directly above the lower plate 3, and has a large number of cylindrical holes 5 arranged vertically at regular intervals on its periphery, and a shaft 6 fixed to the center, which is connected to a motor 17 and a transmission mechanism. 18 at a predetermined speed.

The shaft 6 extends into the hopper, and an agitator 19 is attached to the extending portion. 7 is a block for the material discharge mechanism and rotor seal mechanism, which is a feature of the present invention, and has a side groove shape. ing.

The block 7 is inserted into the hopper 1 from the side,
It encloses a part of the periphery of the rotor 4 with a slight gap.

The block 7 may have an integral structure as a whole, but in this embodiment, it includes an upper body 71 facing the upper surface of the rotor 4, a lower body 72 facing the lower surface of the rotor 4, and these upper bodies 7.
1 and a lower body 72, and these are integrally connected by bolts and nuts 74.

With this structure, rotors 4 of different thicknesses can be easily accommodated by increasing or decreasing the spacers 73.

The upper body 71 and the lower body 72 of the block 7 are provided with a discharge air duct (9.10) having an open chain cross section whose hole center coincides with the cylindrical hole 5 and the discharge port 8 of the rotor 4. The air duct 9 is open at its end face and is connected to a compressed air pipe (not shown).

In the embodiment, the front end of the air duct (9.10) is made of a metal sleeve, which is fitted into the upper body 71 and the lower body 72.

Air distribution holes 91 are provided in the air duct 9 of the upper body 71 .

Although the discharge port 8 is fixed to the lower body 72 in the drawing, it may of course be fixed to the frame 2.

Ring-shaped cavities 11 and 12 are formed around the air ducts l-9 and 10, and the front sides are open to the upper and lower surfaces of the rotor. Rubber seal pieces 13 and 14 that are in contact with the upper surface (upper friction plate) 41 and the lower surface of the rotor (lower friction plate) are installed inside, and a vacant space 11. is provided behind the seal pieces 13 and 14.
Air injection passages 15 and 16 for pressing the seal piece are opened in 12.

The air injection passages 15 and 16 pass through the block and are opened at the end face, and are connected to compressed air piping, but may be connected to the air duct 9 of the upper body 71.

The front half of the surrounding wall of the cavities 11 and 12 has a tapered surface 111, and the outer periphery of the sealing pieces 13, 14 also has a tapered surface with an angle that almost matches the tapered surface.

In other countries, 20 is an exhaust duct, and 21 is a cover plate.

Since the present invention has the above-mentioned configuration, if the shaft 6 rotates the rotor 4 while the block 7 supplies compressed air, the material stored in the hopper 1 will be transferred to the rotor 4.
When the tube holes 5 of the upper body 71 are filled with water and the tube holes reach the block mounting position due to the rotation of the rotor 4, the duct 9 of the upper body 71 communicates with the tube hole 5 and the duct 10 of the lower body 72. Compressed air is blown in from the upper duct 9, and the material in the tube hole is discharged to the discharge port 8 and conveyed to the nozzle via the hose, and this is repeated in sequence to perform continuous spraying.

Therefore, compressed air is supplied to the air injection passage 15.16 of the block 7 during the operation of the machine as described above, and in this way, the compressed air passes through the air injection passage 15.16 to the discharge air duct). Ring-shaped void around 9, 10 11.1
The press-fitted air presses the seal pieces 13 and 14 housed in the cavity from the back side, and the seal pieces 13 and 14 are pressed into close contact with the upper surface 41 and the lower surface 42 of the rotor 4 with their front surfaces.

Since the seal pieces 13 and 14 are pressed from behind by compressed air, there is no uneven contact with the rotor, and the contact pressure is uniform over the entire surface.Moreover, the above-mentioned action prevents wear of the seal pieces 13 and 14, and prevents wear of the rotor upper surface 41. Also, since it is not affected by wear on the lower surface 42, an extremely good sealing effect can always be obtained.

In addition, in terms of operation, simply supplying air at a predetermined pressure to the air injection path 15 is sufficient, and there is no need for any troublesome operations such as adjusting the tightening amount of numerous push bolts. Just by attaching a pressure gauge to the connected piping, you can immediately check whether the sealing condition is correct or not, and no skill is required.

Note that when the side surfaces of the container chamber and the seal piece are tapered, the tapered surfaces come into close contact with each other due to the pressing force of the compressed air applied to the back surface of the seal piece, so that no leakage occurs at the contact surfaces.

According to the present invention described above, the block 7 containing a part of the periphery of the rotor 4 is mounted above the discharge port 8, and the cylindrical hole 5 of the rotor is inserted into the upper body 71 and lower body 72 of this block 7.
A discharge air duct 9.10 that can communicate with the discharge air duct 1-9, 10 is provided, and a ring-shaped cavity 11.1 in which rubber seal pieces 13, 14 are inserted on the outer periphery of the discharge air duct 1-9, 10.
2, and the air injection passages 15 and 16 for pressing the seal pieces were connected to the spaces 11 and 12, so that rotor type spraying '
It is possible to make the rotor seal mechanism, which is important in the machine, into a very simple and compact structure, and the running cost is reduced because the expensive rubber seal only needs to have a small area that is concentric with one cylindrical hole. Can be done.

Furthermore, since the seal pieces are compressed and brought into contact with the top and bottom surfaces of the rotor using compressed air pressure rather than mechanical methods, there is no need for troublesome adjustment work even if the seal pieces or friction plates wear out.
Excellent effects such as sealing with uniform surface pressure can be achieved at all times, and ease of use can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an embodiment of the rotor-type spraying machine according to the present invention, Fig. 2 is a cross-sectional view showing the main parts of the present invention, and Fig. 3 is a cross-sectional view taken along the line III-III in Fig. 2. Figure 4 is the second
It is a partially enlarged view of the figure. 1...Hopper, 4...Lock, 5...
...Cylinder hole, 7...Block, 8...
・Discharge port, 9, 10...Discharge air duct, 1
1.12...Vacancy, 13.14...Rubber seal piece, 15.16...Air injection path.

Claims (1)

[Scope of utility model registration request] A rotor 4 with a cylindrical hole 5 arranged on the periphery is provided below the hopper that stores the materials, and when the rotor rotates and the cylindrical hole 5 reaches the discharge port where it remains stationary under the rotor, air is blown from the top to open the cylinder. In a rotor-type spraying machine that discharges the material filled in the hole, a block 7 containing a part of the periphery of the rotor 4 is attached above the discharge port 8, and an upper body 71 and a lower body 72 of this block 7 are attached. Discharge air ducts 9, 10 that can communicate with the cylindrical hole 5 are provided at the outer periphery of the discharge ducts 9, 10, and a ring-shaped cavity 11. in which rubber seal pieces 13, 14 are inserted. 12, and air injection passages 15 and 16 for pressing the seal piece are connected to these spaces.