JPS5920381Y2 - Rotor type spray machine - Google Patents

Description

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

As a device for spraying materials such as mortar, concrete, and furnace materials, a rotor with a large number of cylindrical holes on the periphery is placed under the hopper, and as the rotor rotates, the material in the hopper is filled into the cylindrical holes. Next, when the rotor rotates and reaches the fixed position, compressed air is blown into the cylinder hole from above, and the material is discharged from the discharge port, and the material is ejected from the nozzle via the hose. It has been known.

The most important thing in such a so-called rotor-type spray machine is the upper and lower sealing mechanism of the rotor.

This is because in this type of spray machine, the compressed air inlet for discharging materials is always open on the top of the rotor, and if compressed air leaks from the upper and lower surfaces of the rotor, materials cannot be discharged smoothly. Conventionally, as a countermeasure for this, rubber seal plates with approximately the same diameter as the rotor are attached to the bottom surface of the hopper and the top surface of the frame, and the top and bottom rubber seal plates are used to pinch the top and bottom surfaces of the rotor to seal the rotor. Ta.

However, with this rotor seal structure, the size of the seal plate is large and it is necessary to use a large amount of expensive wear-resistant rubber material, which increases the cost. Therefore, it was difficult to obtain an even sealing surface pressure all around the circumference, and the disadvantage was that it required skill to operate.

Furthermore, with this seal structure, when materials such as sand and gravel accumulated in the hopper are filled into the moving tube hole,
It is easy to get into the minute gap between the upper surface of the rotor around the cylindrical hole and the lower surface of the seal plate opening, and the granular or powdery material that has entered slides relative to the rotor and scrapes the lower surface of the stationary seal plate. As a result, the seal plate rapidly wears out due to the encroachment of such materials, and the seal plate must be replaced quite frequently.

As a result, there were problems in that it was not easy to use and the running cost was high.

This invention eliminates the drawbacks of the conventional rotor-type spraying machine as described above, and has a simple and compact structure that maintains an extremely good seal between the top and bottom of the rotor. The purpose of this project is to provide a practical rotor-type spraying machine that can effectively prevent such problems.The main features of this machine include a discharge air duct located at the peripheral edge of the rotor corresponding to the material discharge port, and a A rotor seal portion including a ring-shaped seal piece that contacts the lower surface is arranged, and a wiping member that rotates with its outer periphery touching the rotor upper surface is installed at a position in front of the rotor seal portion in the rotational direction, and this wiping member The object is to forcibly remove materials moving on the top surface of the rotor, and keep the top surface of the rotor always clean before entering the rotor seal section.

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

1 to 5 show a rotor-type spraying machine according to the present invention, in which 1 is a hopper for storing materials to be sprayed, and is supported on a frame 2 with a bottom plate 3.

A rotor 4 is located directly above the bottom plate 3, and has a large number of cylindrical holes 5 arranged vertically at regular intervals around the circumference, and a shaft 6 fixed to the center of the rotor. It is designed to rotate at a speed of .

Reference numeral 9 denotes a material discharge port disposed on the same axis as the cylindrical hole 5, and is connected to a spray nozzle (not shown) via a hose.

The above configuration is almost the same as that of a conventional rotor-type spray machine, but the present invention first provides a local rotor seal portion 10 at a portion of the peripheral edge of the rotor corresponding to the material discharge port 9, As shown in FIGS. 2 and 4, the rotor seal portion 10 is a thin shape that is inserted inward from the side of the hopper 1 so as to maintain a slight gap between the top and bottom of the rotor peripheral zone and the peripheral edge. Block 11, a discharge air duct drilled in the thin block 11 so that the hole center coincides with the material discharge port 9 and the cylinder hole 5) 12.13, and the rotor around these discharge air ducts [2, 13] Rubber seal pieces 14 and 15 are provided which are in contact with the upper friction plate 41 on the upper surface and the lower friction plate 42 on the lower surface of the rotor.

Furthermore, the present invention is to install a wiping rotor 16 whose outer periphery is in contact with the upper surface of the rotor at a position before the rotor seal portion 10 in the rotor rotation direction. A cover unit 17 having a required area is attached to the side of the rotor seal portion 10, and this cover unit 1
A hanging wall 18 extending toward the rotor 4 is formed on the rear side of the cover 7, and a bearing 19 is provided at the intermediate portion of the side wall of the cover unit 17.
Further, the other end of the shaft portion 161 is passed through the hopper wall, and a driving means 21 such as a gear motor is connected to this to provide rotation in a direction opposite to the moving direction of the rotor.

The wiping rotor 16 may be a roller having a core body 20 covered with a coating 201 made of rubber or synthetic resin as shown in FIGS. 2 and 3; 20
It may be a brush-like thing with flocked hair 201 around it.

Furthermore, the wiping rotor 16 needs to be longer than or equal to the diameter of the seal piece 14, and its arrangement may be in a centripetal direction with the core 20 facing the center of the rotor.
It may also be arranged eccentrically, deviating from the center of the rotor by a required angle.

In the latter configuration, a force is applied to move the material on the rotor in the direction along the axis of the wiping rotor 16, so that the material can be successfully discharged from the cover unit 17 to the outside.

Note that the discharge air ducts 12 and 13 in the rotor seal portion 10 are constructed of metal sleeves, and are fitted into the upper and lower bodies that form the thin block 11.

And the seal pieces 14 and 15 are the discharge air ducts)
Air injection holes 24 and 25 are installed in the cavities 22 and 23 formed around 12 and 13, and are bored in the thin block 11.
It is pressed from behind by compressed air injected into the cavity through the rotor, and comes into contact with the upper and lower surfaces 41 and 42 of the rotor with a predetermined surface pressure.

Of course, the discharge air duct 12 on one side is the thin block 1.
It is connected to a compressed air supply source through a guide hole provided in 1.

Since the present invention has the above-mentioned configuration, the rotor 4 is rotated while the discharge air duct 12 and the air injection hole 24.
When compressed air is supplied to 25, the material A stored in the hopper 1 is filled into each cylinder hole 5 of the rotor 4, and then when the cylinder hole 5 reaches the rotor seal part 10 due to the rotation of the rotor 4, The upper and lower air blowing ducts) 12.13 and cylindrical hole 5 communicate with each other, whereby compressed air is blown into the cylindrical hole, and the material A in the cylindrical hole is discharged to the material discharge port 9, and the air is blown through the hose to the nozzle. is carried by air current.

At this time, the empty space 22 around the discharge air duct H2, 13
．． 23 is press-fitted with compressed air, and this press-fitted air causes the seal pieces 14 and 15 to receive a uniform back surface over the entire surface and come into close contact with the upper surface 41 and lower surface 42 of the rotor 4, so that there is no uneven contact on the contact surfaces. A tight seal is formed by a small-area member.

Further, a cover unit 17 is provided at a position rearward in the rotation direction from the seal pieces 14.15, and a wiping rotor 16 is horizontally suspended inside the cover unit 17, and this is in contact with the rotor upper surface 41 in a direction opposite to the rotor rotation direction. It is rotating.

Therefore, when material a' in the hopper other than material a filled in the cylindrical hole 5 accumulates on the upper surface of the rotor 4 and moves together with the rotor, the upper layer is removed by the hanging wall 18 of the integral cover 17. Then, the cover 1 went further under the hanging wall 18.
7, the material that has entered the wiping rotor 16 is forcibly removed backwards by the rotational movement of the rotor at the same time as the material that has risen from the cylindrical hole 5 above the level of the top surface of the rotor. a'' is also scraped off by the wiping rotor 16 so that it is approximately at the same level as the top surface of the rotor.

As a result, when the rotor 4 passes through the wiping rotor 16, the surface around the cylindrical hole of the rotor 4 has a clean surface with almost no material remaining, and in this state it slides with the previous seal pieces 14 and 15.

Therefore, the seal pieces 14 and 15 are less likely to be damaged by materials being caught in them, and a good rotor seal state can be maintained over a long period of time, taking full advantage of the one-sided back pressure type using compressed air.

When using the rotor-type spraying machine of the present invention as explained above,
Discharge air ducts 12 and 13 communicating with the material discharge port 9 are located at positions corresponding to the circumferential edge of the rotor 4 where the cylindrical hole 5 is arranged, and seal pieces 14 and 15 surrounding these are in contact with the upper and lower surfaces of the rotor.
The wiping rotor 16, whose outer periphery is in contact with the rotor upper surface 41, is disposed horizontally at a position closer to the rotor seal portion 10 in the rotational direction than the rotor seal portion 10.
The rotor seal mechanism, which is important in this type of spraying machine, can be made into an extremely simple and compact structure, and the wiping rotor 16 continuously wipes away excess material on the top of the rotor and allows it to enter the rotor seal section 10. As a result, the biting of the material and the resulting wear of the seal piece 14 are greatly reduced, and good sealing performance can be maintained over a long period of time.

Further, since the expensive rubber seal needs to be small in size and concentric with the cylindrical hole, and there is less wear, running costs can be greatly reduced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an embodiment of a rotor-type spray machine according to the present invention, FIG. 2 is a partially cutaway plan view showing the main parts thereof, and FIG. cross section,
Figure 4 is a sectional view of the rotor seal part in Figure 2, and
The figure is a sectional view showing another embodiment of the wiping rotor. 4... Rotor, 5... Cylindrical hole, 9... Material discharge port,
10...Rotor seal part, 12.13...For discharge,
Air duct, 14, 15... Seal piece, 16... Wiping rotor.

Claims (1)

[Scope of utility model registration request] A rotor seal portion 10 having a material discharge air duct 12.13 and a seal piece 14.15 in contact with the upper and lower surfaces of the rotor around this is arranged at a position corresponding to the circumferential edge of the rotor 4 where the cylindrical hole 5 is arranged. A rotor spraying machine characterized in that a wiping rotor 16 whose outer periphery is in contact with the upper surface of the rotor is mounted at a position before the rotor seal portion 10 in the rotational direction.