JP2575856Y2 - Suction type air blast device - Google Patents

Description

[Detailed description of the invention]

[0001]

In the present invention, a hose for sucking a blast material is connected to the side of a nozzle for ejecting a compressed air, and the blast material is compressed by the suction action of the air of the compressed air. And a suction type air blasting device for ejecting the compressed air from a nozzle together with the compressed air.

[0002]

2. Description of the Related Art Conventionally, a suction type air as described above is used.
The blasting device uses the differential pressure of the nozzle part to directly suction the blast material from the blast material tank, and it is difficult to suck and transfer the steel blast material with a diameter of 0.3 mm or more due to the small amount of air suction. Met. For this reason, when using a steel blasting material having a diameter of 0.3 mm or more, a so-called pressurized air blast device is used in which the blasting material is put into a pressure tank and the blasting material is sent out together with a pressurized air. However, there is a problem that the size is increased and equipment cost is increased. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a suction-type air-blasting device that can be used even with a steel material having a particle diameter of 0.3 mm or more.

[0003]

In order to achieve the above object, a suction-type air-blasting device according to the present invention is provided at the lower end of a blast material tank with a blast material flowing down from the blast material tank through a vertical passage. Suction air sucked through a passage
And an inverted T-shaped mixing cylinder for mixing
An injection nozzle is communicatively connected to and attached to the tip of the compressed air jet pipe, and the inside of the tip of the compressed air jet pipe and one end of a horizontal passage in the mixing cylinder are connected and connected via a suction hose. A position upstream of the communication connection position with the suction hose in the compressed air ejection pipe and a position between the communication position with the suction hose and the vertical passage in the mixing cylinder are connected through a bypass hose. It is characterized by having done.

[0004]

According to the present invention, if the compressed air is supplied to the compressed air jet pipe by adopting the above-mentioned solution, the mixing cylinder for mixing the blast material flowing down from the blast material tank and the suction air is used. The air having the same pressure as the compressed air supplied to the compressed air jetting pipe is supplied, and is joined to the supplied air to increase the amount of supplied air. Even the granular shot material is sucked and transferred, and is further jetted at the projection nozzle portion while being carried on a compressed air flow.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. At the upper part of the base 1, there are provided a projection material tank 3 in which a separator 2 is communicated, and a dust collector 4 at appropriate intervals. The dust collector 4 is connected via a suction pipe 5 to the separator. -2. As shown in FIG. 2, an inverted T-shaped mixing cylinder 6 for mixing the blast material flowing down from the vertical passage 6A and the suction air sucked from the horizontal passage 6B is connected to the lower end of the blast material tank 3 as shown in FIG. ing. Further, in front of the blast material tank 3, as shown in FIG.
Is arranged so as to be in communication with the tip of the compressed air ejection pipe 8, and the inside of the tip of the compressed air ejection pipe 8 and one end of the horizontal passage 6 </ b> B in the mixing cylinder 6 are communicated via the suction hose 9. ing.

Further, a position of the compressed air ejection pipe 8 upstream of a communication position with the suction hose 9 and a position of the mixing cylinder 6 between the communication position with the suction hose 9 and the vertical passage 6A. Are connected to each other through a bypass hose 10 so that the compressed air of the compressed air ejection pipe 8 is supplied to a position near the suction hose 9 in the horizontal passage 6B of the mixing cylinder 6. A cover tube 11 surrounding the injection nozzle 7 and opening only at the front end is attached to the end of the compressed air jetting tube 8, and the upper part of the cover tube 11 is connected to a collecting pipe to the separator-2. 12 are connected. In the drawing, 13 is a joint pipe, 14 is an air passage, and 15 is an annular seal material.

[0007] In the above-mentioned structure, the dust collector 4 is operated in the state shown in FIG.
The compressed air is supplied to the compressed air ejection pipe 8 in a state where the compressed air is brought into contact with the surface to be processed via the metal material 15. As a result, while the compressed air passes through the injection nozzle 7 and is injected, a suction action is generated in the mixing cylinder 6 via the suction hose 9. Furthermore, the suction hose from the bypass hose 10 to the mixing cylinder 6
Since the compression air is also supplied to the suction pipe 9 side, in the mixing cylinder 6, in addition to the suction air sucked from the right end of the horizontal passage 6B, the compression air from the bypass hose 10 is merged, so that the suction air amount is increased. Is increased, mixed with the steel blast material flowing down from the vertical passage 6A, and sucked and transferred.

In this way, the amount of suction air is increased and the blasting material is sucked. Therefore, even if the blasting material has a large particle diameter of 0.3 mm or more, it is sucked and transferred and merges with the injection nozzle 7. Then, it is projected toward the surface to be processed and blasted. The blasted material blasted in this manner is reflected and sucked and collected by the separator 2 by the suction action of the dust collector 4 from the collection tube 12, separated from the dust-containing air, and falls into the blast material tank 3. Can be stored. In the above embodiment, the blasted material is collected by using the reflection and the suction of the dust collector 4, but after the blasted material is projected, the blasted material is naturally dropped and collected separately to form an air blast. , The separator-2, the dust collector 4, the governor cylinder 11 and the like can be omitted.

[0009]

As is apparent from the above description, the present invention is unique in that a compression cylinder having the same pressure as the compression air supplied to the injection nozzle is supplied to the mixing cylinder portion for mixing the blast material with the suction air. With this configuration, the projecting material is transferred while increasing the suction air amount. Therefore, even if the projecting material has a larger particle size than the conventional one, it can be sucked and ejected from the ejection nozzle. The places to benefit are enormous.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a portion A in FIG.

FIG. 3 is an enlarged sectional view of a portion B in FIG.

[Explanation of symbols]

 3 Projectile material tank 6A Vertical passage 6B Horizontal passage 6 Mixing cylinder 7 Injection nozzle 8 Compressed air ejection pipe 9 Suction hose 10 Bypass hose

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B24C 5/02 B24C 7/00 B24C 9/00

Claims (1)

(57) [Scope of request for utility model registration] 1. An inverted T-shape at the lower end of a blast material tank 3 for mixing blast material flowing down from the blast material tank 3 via a vertical passage 6A and suction air sucked through a horizontal passage 6B. The mixing cylinder 6 is provided in communication connection, and the injection nozzle 7 is connected to and attached to the tip of the compressed air ejection pipe 8, and the inside of the tip of the compressed air ejection pipe 8 and one end of the horizontal passage 6 </ b> B in the mixing cylinder 6 are provided. Are connected to each other via a suction hose 9 so that the upstream position of the compressed air jet pipe 8 with respect to the communication position with the suction hose 9 and the communication position of the mixing cylinder 6 with the suction hose 9. A suction type air blast device, wherein the suction air-blast device is connected to a position between the air passage and the vertical passage 6A via a bypass hose 10.