JPS5920384Y2 - dry spraying machine - Google Patents

Description

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

As a means of quantitatively spraying powder and granular materials such as mortar, concrete, and furnace materials, a housing with a built-in drop tube is installed below the hopper, and a rotor with a bottomed pocket is rotated at the bottom of the housing to allow the drop to fall. When the pocket filled with material reaches the discharge zone from the cylinder, compressed air is blown from above the rotor into a location near the inner circumference of the pocket, and the material inside the pocket is discharged through a vent-shaped discharge port provided near the outer circumference. There is known an apparatus in which the liquid is discharged upward and the air is blown to a nozzle via a conveyance hose.

In this type of spraying machine, in order to efficiently discharge material using compressed air, it is customary to place a rubber seal plate or pad in close contact with the upper surface of the rotor in the discharge zone. If the contact pressure is too low, the seal will fail, resulting in air leakage or material entrapment, while if the contact pressure is too high, the wear of the seal plate will increase unnecessarily or create excessive resistance to rotor rotation. It turns out.

Therefore, it is important to set an appropriate tightening margin for the rubber seal plate, but in conventional spraying machines of this type, a flat fan-shaped rubber seal is attached to the recessed part of the housing, which is formed symmetrically with the drop tube. The rubber seal plate was rolled down with several cam rolls with the rubber seal plate attached to the outer diameter side of the rubber seal plate, so the band plate got in the way. This has the drawback that the actual tightening allowance of the rubber seal plate cannot be easily determined and confirmed, and appropriate retightening cannot be performed in response to wear. Failures such as failure to occur or failure to use the seal plate without knowing that it has reached the end of its lifespan, resulting in major operational troubles, cannot be avoided.

The present invention eliminates the drawbacks of the above-mentioned spraying machine, and provides a dry spraying machine with a simple structure that allows the actual tightening margin of the rubber seal plate to be confirmed and determined, and that allows the tightening margin to be easily and appropriately adjusted. The feature is that a rubber seal plate and an elastic plate as a back plate are placed in the recessed part of the housing, and when this elastic plate is pressed by the stem member, the reaction force generated is used to seal the rubber seal. The reason is that the plate is fastened to the top of the rotor.

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

In Figures 1 and 2, 1 is a hopper into which the powder and granular material to be sprayed is placed, 2 is a cylindrical housing provided below the hopper 1, and 3 is a rotor located near the bottom of the housing. It is adapted to be rotated by a main shaft 4 which is pierced through the main shaft, and a number of pockets 5 having a bowl-shaped bottom 51 are provided at regular intervals in a zone around the main shaft.

Reference numeral 6 denotes a material drop tube for filling the pocket with the material in the hopper, and is attached to the housing 2 by welding, locking, or other means.

Reference numeral 7 denotes a recess formed in the housing 2 at a position shifted from the rotational angle of the material drop tube 6, and is composed of an inner diameter wall 71, a top wall 72, and peripheral end walls 73, 73, and the bottom and outer diameter sides are open. There is.

Reference numeral 8 denotes a rubber seal plate inserted into the recess 7 and arranged so as to be in contact with the top surface of the rotor through the open bottom. An air injection part 10 is provided near the inner diameter at the center position in the width direction of the push plate 9 and the rubber seal plate 8, and a material discharge part 11 is provided near the outer diameter. is provided.

Reference numeral 12 denotes a belt-shaped patch plate that covers the outer peripheral surface of the rubber seal plate 8, and is removably attached by a fixing means 13, such as a nut, into which a bolt provided on the housing 2 is screwed.

In the above configuration, the present invention provides the recessed portion top wall 7.
An elastic plate 8' is disposed on the rubber seal plate 8 and the rubber seal plate 8, and a stem member 14, 14 is interposed between the elastic plate 8' and the rubber seal plate 8. 1
4.14, the rubber seal plate 8 is tightened to the upper surface of the rotor by applying pressure to the elastic plate 8'.

Here, the stem member 14.14 is composed of two groove-shaped metal parts with flanges 142 and 142' formed at both ends of the web 141, and the flange ends are arranged in the circumferential direction so as to face each other across the material discharge part 11. It is arranged close to the end wall 73.73, and is prevented from falling by a long hole 15 formed in the web 141 and a stopper 16 projecting from the circumferential end wall 73.73 so as to pass through the long hole 15.

The stem member 14.14 is attached to the lower 7 flange 1.
42' is in contact with the push plate 9 of the rubber seal plate 8, while the upper flange 142 has push holes H7, 17 at several places.
is screwed back, and the tip of the push pin 17.17 is brought into contact with the push plate 9' of the elastic plate 8'.

In principle, a rubber seal plate is used as the elastic plate 8, but if this is not the case, a rubber seal plate of the same material and size is used.

Incidentally, in order to make it easier to see the amount of compression or wear, a scale or an equivalent display may be provided on the front surface of the circumferential end wall 73, 73.

Further, the rotor 3 according to the present invention includes a case where a plate in the same arrangement as the pocket is attached to the top of the rotor 3.

Since the present invention has the above-mentioned configuration, when the rotor 3 rotates by driving the main shaft 4, the material in the hopper 1 is filled from the material falling tube 6 into the pockets 5, and then the pockets 5 are sequentially filled with the rubber seal plate. 8, compressed air is blown into the inner diameter side of the pocket from the air injection part 10, and the compressed air blows the material from the material discharge part 11 through the bent pipe to the hose.

At this time, in the present invention, the stem members 14, 14 are mounted on the rubber seal plate 8, and the stem members 14, 14 are mounted on the rubber seal plate 8.
．． Push holes H7 and 17 pass through the upper part of the rubber seal plate 8, and the tip presses the elastic plate 8' that is against the rubber seal plate 8, and the reaction force from the elastic plate 8' passes through the stem member 14 and 14 and seals the rubber seal. The tightening of the plate 8 acts as a force.

Therefore, if the elastic plate 8' is made of the same material and size as the rubber seal plate 8, preferably a spare rubber seal plate, the top wall 7
This corresponds to the compression of the elastic plate 8' pressed against the rotor 2, that is, the tightening of the rubber seal plate 8 against the rotor, and this is immediately visible through the outer peripheral opening of the recessed portion 7.

Therefore, it is possible to determine the actual sealing state of the rubber seal plate 8 without having to remove the backing plate 12 one by one.

In addition, the tightening of the rubber seal plate 8 is not performed locally by applying pressure using several cams, but is performed on a wide surface such as the lower flange of the stem member 14, 14, so that the contact pressure is dispersed. Therefore, uneven contact with the rotor is less likely to occur.

However, the stem part 14.14 is a push pole) 17.1
The rubber seal plate 8 can be moved up and down by screwing in, and the amount of tightening of the rubber seal plate 8 can be freely adjusted, so it is possible to easily and reliably tighten the rubber seal plate 8 according to the degree of wear. become.

According to the present invention explained above, the tightening margin of the rubber seal plate against the rotor can be easily confirmed and determined due to the simple structure, and the tightening margin can be adjusted appropriately, thereby achieving stable dry spraying. You can get excellent results.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a dry spraying machine according to the present invention, and FIG. 2 is an enlarged longitudinal sectional view thereof. 1...hopper, 2...housing, 3
...Rotor, 5...Pomat, 7...
...Recessed portion, 8...Rubber seal plate, 8'
......Elastic plate, 10... Air injection part, 1
1... Material discharge part, 14... Stee member.

Claims (1)

[Claims for Utility Model Registration] l A material dropping tube 6 is provided in the housing 2 below the hopper 1, and a rotor 3 having a number of bottomed pockets 5 is attached below the material dropping tube 6. A rubber seal plate 8 seals the top surface of the rotor in a recess 7 formed at a position with a rotational angle shifted from that of the rubber seal plate 8, and an air injection part 10 and a material discharge part 11 that pass through the pocket through the rubber seal plate 8.
In the dry spraying machine, an elastic plate 8' facing the rubber seal plate 8 is disposed in the recess, and a step member 14 is placed between the elastic plate 8' and the rubber seal plate 8.
．． 14, and the rubber seal plate 8 is tightened by pressurizing the elastic plate 8' with the step member 14.14. 2. The dry spraying machine according to claim 1, wherein the elastic plate 8' is a rubber seal plate.