JPS6145897Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotor-type spraying machine.

A spraying machine that uses compressed air and a rotor with many pockets around it is commonly used as a device for spraying materials such as mortar, concrete, furnace materials, etc., but conventional spraying machines of this type The rotor is equipped with a bent or elbow-shaped compressed air blowing part and a nozzle on the machine side at each position above and below the rotor, and compressed air is supplied when the material filled in the pocket reaches the above position. Since the discharge structure was such that the blowing material was forced into the hose through the nozzle on the machine side, the conveying force was likely to be insufficient if the distance from the spraying machine body to the spraying nozzle was long, and the material being sprayed could contain moisture. If it contains a large amount of silica or has a strong viscosity, there is a problem in that it adheres to the nozzle on the machine side, where the initial velocity is low, and tends to gradually grow and cause a clogging phenomenon.

As a countermeasure against this, conventionally, a ring nozzle is installed at the tip of the machine side nozzle to add secondary compressed air. It is not possible to prevent materials from adhering to the Therefore, forming a rubber cylindrical wall in the rear zone of the secondary compressed air addition section has been carried out, but since this method simply utilizes the elasticity of the rubber wall, there are still no materials for spraying. In addition to insufficient adhesion prevention effect,
It was not possible to solve the problem of clogging of the nozzle on the machine side when spraying materials containing reinforcing fibers, which have been frequently applied recently, and there was a problem that complicated disassembly and cleaning had to be carried out quite frequently.

This invention was devised after repeated research based on the above-mentioned circumstances, and is suitable for spraying materials that contain a lot of water or have become highly viscous due to the use of admixtures, or materials containing reinforcing fibers that can easily form fiber balls. The object of the present invention is to provide a rotor-type spraying machine with a simple structure that can smoothly convey long distances without causing any adhesion or clogging at the nozzle on the machine side.

In order to achieve this objective, the present invention includes a flexible sleeve having a substantially similar shape inserted into the nozzle on the machine side, and a hole center located at the rear side of the nozzle on the machine side so that the center of the hole is aligned with the center of the nozzle. Fluid injection holes are provided in the curved portion of the flexible sleeve that are aligned or substantially parallel to each other and cooperate with changes in the internal pressure of the sleeve to create forced vibrations in the thickness direction, thereby simply increasing the elasticity of the sleeve. In addition, the dynamic pressure of the pressurized gas introduced from the fluid injection hole is used to forcefully deform the flexible sleeve with vibration, and at the same time, the flexible sleeve is It is designed to function as a jetting guide and improve material pressure feeding efficiency.

Embodiments of the rotor-type spraying machine according to the present invention will be described below with reference to the accompanying drawings.

In FIG. 1 and FIG. 2, 1 is a support plate 22.
The hopper 2 fitted in the rotor is a rotor whose upper and lower surfaces are sealed by seal plates 24 and 24' fixed to a support plate 22 and a chassis 23. Cylindrical pockets 3 are provided at regular intervals around the periphery, and pockets 3 are provided in the center. Drive shaft 25
It can be rotated freely. 4 is the material filling port,
Reference numeral 5 denotes a compressed air blow-in port bored at a position substantially opposite to the material filling port 4, and 6 denotes a machine-side nozzle fixed with a flange 61 at a position corresponding to the blow-in port 5. It is bent due to the curvature of , and the transport hose 7 is connected to the tip. 8 is a spray nozzle.

Such a structure is similar to that of a conventional spray machine, but the present invention has a structure in which the hole center is preferably aligned with the nozzle center or in a parallel relationship at the rear rear position (outside curved part) of the machine side nozzle 6. In addition to forming the fluid injection hole 9 as shown in FIG. A collar 11 formed on the upper part of the flexible sleeve 10 is engaged with an inner step 12 of the machine side nozzle 6, and is fixed by tightening bolts 13 to obtain a predetermined compression. The flexible sleeve 10 is specifically made of rubber or soft plastic, and a suitable amount of gap 16 is formed between the outer peripheral surface 14 of the sleeve and the inner surface 15 of the nozzle on the machine side. The flexible sleeve 10 may be smooth as shown;
In some cases, a spiral protrusion having a predetermined lead angle may be formed.

Conduits 17 and 17' from a compressed air supply source are connected to the inlet 5 and the fluid injection hole 19, and the conduit 17' is connected to a liquid source 20 via a valve 18 and a pump 19. A branch pipe 21 is connected.

The structure of the main body of the spraying machine is not limited to the type shown in the drawings, but also includes a structure in which a circular chain-shaped rotor is attached to the bottom of an airtight tank and the outlet is exposed to a pocket on the circumference of the rotor.

Next, to explain the operation of the present invention, if the rotor 2 is rotated while putting the material A into the hopper 1, and at the same time compressed air is fed from the conduits 17, 17', the material A can be transferred to the filling port 4. The pockets 3 and 3 of the rotor 2 are sequentially filled through the pump, and as the rotor 2 continues to rotate, the pockets 3 are filled with the machine side nozzle 6.
When the condition is met, compressed air is blown in from the air inlet 5 at the top, and the material A in the pocket is discharged to the machine nozzle 6 and fed under pressure through the conveyance hose 7.

At this time, in the present invention, a fluid injection hole 9 is formed on the rear side of the machine side nozzle 6, and a flexible sleeve 10 having a similar shape is inserted into the machine side nozzle. In the axial direction of the fluid injection hole 9, the flexible sleeve 10 has its curved back 101.
It is located in a hollow shape such that it faces the fluid injection hole 9. Therefore, if compressed air is blown through the fluid injection hole 9 during operation, the curved back portion 101 will bulge inward due to this dynamic pressure, while the pockets 3 of the rotor 2 will be spaced at a certain interval inside the flexible sleeve 10. Because the tube is formed in a vacuum, compressed air, which is responsible for pushing out the material, passes through it intermittently at very short intervals. Therefore, due to the change in internal pressure and the action of external pressure, the flexible sleeve 10 vibrates continuously around the curved back portion 101 as shown in FIG.

Mechanically, the curved back portion 101 is a location where materials are likely to adhere, but as this portion is constantly subjected to forced vibrations during operation as described above, it is difficult to avoid materials being wet or having a highly viscous composition. No adhesion occurs. In addition, when materials contain reinforcing fibers, when mixed with other wet ingredients, they often form lump-like materials called fiber balls, which often fall into curved areas and accumulate.
Even in the case of such materials, the flexible sleeve vibrates in the thickness direction, so that they are effectively ejected and no clogging occurs.

As described above, while the compressed air from the fluid injection hole 9 acts as a source of vibration for the flexible sleeve 10, the flexible sleeve 10
In order to act as a guide for compressed air, the compressed air passes through the gap 16 between the flexible sleeve outer circumferential surface 14 and machine side nozzle inner circumferential surface 15 as an annular high-speed flow, and continues in the nozzle axial direction. gushes out.
As a result, an annular membrane flow is formed from the tip of the machine side nozzle to the transfer hose 7, so that the material discharged from the tip of the flexible sleeve 10 is effectively given buoyancy and is efficiently pumped.

In addition, if the valve 18 is opened during operation and an admixture such as water, quick-setting material, or reducing material is supplied from the branch pipe 21, the flexible sleeve 10 is vibrated as described above by being entrained in the compressed air. Afterwards, it is sprayed from the outer periphery of the tip into the machine nozzle, making it possible to easily control the composition and properties of the material.

According to the present invention described above, in a rotor-type spraying machine, a flexible sleeve 10 having a substantially similar shape is inserted into the machine side nozzle 6, and the rear surface of the machine side nozzle 6 is inserted into the machine side nozzle 6. At this position, the hole center is aligned with or substantially parallel to the nozzle center, and fluid is injected into the curved portion 101 of the flexible sleeve 10 to create forced vibrations in the thickness direction in cooperation with changes in the internal pressure of the sleeve. Since the holes 9 are provided, the following excellent effects can be obtained.

When the fluid is injected through the fluid injection hole 9 while the rotor is operating, the center of the fluid injection hole 9 is aligned with the center of the nozzle or is in a substantially parallel relationship. As the portion 101 bulges inward, compressed air and the material pass intermittently in short cycles inside the flexible sleeve 10, and the resulting change in internal pressure and the external pressure cause the curved portion 101 to become centered. As a result, forced vibrations are constantly generated, and for this reason, even if the material is not sufficiently dry and contains considerable moisture, has a highly viscous composition, or contains reinforcing fibers with a high specific gravity. , it can be discharged smoothly without sticking to the machine side nozzle elbow or getting stuck.

Moreover, the fluid to which external pressure has been applied is transferred to the fluid injection hole 9
Since the hole center of the nozzle is aligned or substantially parallel to the nozzle center, the flexible sleeve 10 is not brought into close contact with the inner wall of the nozzle on the machine side, and vibrations can be applied all the way to the tip while maintaining an appropriate gap. give,
Then, it is ejected in a straight line along the outer periphery of the flexible sleeve 10. Therefore, while taking advantage of the advantages of the flexible sleeve 10, it is possible to efficiently and reliably impart buoyancy to the material discharged from the tip and transport it at high speed.

Furthermore, in terms of structure, the fluid injection hole 9 is formed integrally with the machine nozzle 6, so the number of parts is small, and the degree of wear on the flexible sleeve can be determined without disassembling each machine nozzle. can.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a rotor-type spraying machine according to the present invention, and FIG. 2 is a cross-sectional view showing essential parts of the present invention. 2... Rotor, 3... Pocket, 5... Compressed air inlet, 6... Machine side nozzle, 9... Fluid injection hole, 10... Flexible sleeve, 16... Gap, 101... Curved back.

Claims (1)

[Scope of utility model registration request] A rotor with many pockets is rotated under the material loading section, and the materials in each pocket are discharged from the inlet to a nozzle on the machine side using compressed air, and are then force-fed to the spray nozzle at the end of the hose. In the spraying machine, a flexible sleeve 10 having a substantially similar shape is inserted into the machine side nozzle 6, and the hole center is aligned with the center of the nozzle at the back side position of the machine side nozzle 6. A rotor characterized in that a fluid injection hole 9 is provided in a curved portion 101 of a flexible sleeve 10 in a substantially parallel relationship to create forced vibration in the thickness direction in cooperation with changes in the internal pressure of the sleeve. Type spraying machine.