CN2180408Y

CN2180408Y - Circular sand-blasting machine

Info

Publication number: CN2180408Y
Application number: CN 94200843
Authority: CN
Inventors: 蒯执中; 庞志红
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-21
Filing date: 1994-01-21
Publication date: 1994-10-26
Anticipated expiration: 2004-01-21

Abstract

The utility model discloses a circular sand blasting machine which comprises a sand storage box, a spray gun, a sand supply pipe, and a recovery pipe. The utility model is characterized in that the spray gun is provided with a replaceable a blast nozzle with a conic flow channel and blast nozzle with double conic flow channels, and the outer part of each blast nozzle is provided with a recovery cover, a rubber sealing ring and a brush sealing ring; the top part of the sand storage box is provided with a centrifugal type air exhauster, a rigid bag type dust collector and a filter, both ends of the sand supply pipe are respectively connected with the bottom side of the sand storage box and a sand mixing chamber of the spray gun, and both ends of the recovery pipe are respectively connected with the top side of the sand storage box and a recovery chamber formed by the recovery cover. The utility model has the characteristics that the environment can not be polluted, sand material can be used circularly, the sand blasting quantity is large, the pressure is high, the blasting angle is large, the blast nozzle can be changed easily, etc.

Description

Circular sand-blasting machine

The utility model relates to a kind of abrasive jet machinery, specifically a kind of circulation sand-blasting machine that is used for derusting by sandblasting or eliminates welding stress.

The used sand-blasting machine of each factories and mines is a fixed at present, sand storage case injects with pressure-air in its principle system, suction pipe is embedded in the sand, make air and sand simultaneously by suction pipe through nozzle directive surface of the work, the rust that is removed, metallic dust and emergy splash simultaneously, fall in the collection emery disc, and its major defect is that operating environment is quite abominable, bring harm for operator's health, sand material utilization rate is low.Chinese patent CN2053133U discloses a kind of light self-priming circulation sand-blasting machine, it comprises that a bottom is that conical cylindrical shell is as sand storage case, the blasting cabinet of a separate assembling, adopt Laval formula air nozzle, and the blast media supply pipe and the recovery tube that are connected with sand-blasting gun with cylindrical shell respectively separately, the top of cylindrical shell is provided with separately independently cyclone separator, deduster and filter, and the cylindrical shell top is equipped with the dust quantity indicator.It is free from environmental pollution when though this sand-blasting machine has operation, the advantage of blast media reusable edible, but have following shortcoming: 1. the gas channel of Laval formula air nozzle rear is dolioform, high pressure restricted gas flow from the pneumatics unit is quickened in this compression earlier, then expand and enter the mulling chamber after the deceleration step-down, in the mulling chamber, be difficult to form high negative pressure, suction sand amount and blasting pressure have been significantly reduced like this, this has not only reduced the ability of derusting by sandblasting, and be difficult to utilize sandblast to eliminate welding stress, thereby limited the scope of application of this machine because of blasting pressure is low; 2. blast nozzle and sand-blasting gun are integrated, and blast nozzle is a consumable accessory, need when changing blast nozzle to carry out integral replacing together with sand-blasting gun, and waste, the inner passage of this blast nozzle is cylindrical circular simultaneously, and jet angle is little, and herewith the sandblast working face is little, and sandblast efficient is low; 3. set deduster and the filter surfaces in cylindrical shell top very easily gathers full dust, needs often to change, and can normally use, and this was both uneconomical, uses also inconvenient.

The purpose of this utility model provides a kind of free from environmental pollution, and dust and sand material fully parting sand material can be recycled, and the sandblast amount is big, the pressure height, and jet angle is big, and service time is long, the circulation sand-blasting machine that consumable accessory is changed easily.

The utility model is achieved in that a kind of circulation sand-blasting machine comprises sand storage case, spray gun, and separately respectively with sand storage case link to each other with spray gun for sandpipe and recovery tube, the end thread of source of the gas passage is connected with the air nozzle that shrinks cone cavity in the wherein said spray gun, the exit of spray gun is provided with removable double cone shape runner blast nozzle, be provided with around the blast nozzle and reclaim cover, reclaim cover and be provided with rubber seal and hairbrush sealing ring with the workpiece contact jaw, the top of sand storage case is equipped with centrifugal air exhauster, be equipped with the rigidity bag filter below the air exhauster, in dust-precipitator, be provided with filter, link to each other with the sand storage case bottom side for sandpipe one end, the other end links to each other with the mulling chamber of spray gun, and recovery tube one end links to each other with the sand storage case top side, and the other end links to each other with the recycling cavity that reclaims cover.

Now in conjunction with the accompanying drawings and embodiments the utility model is done specific descriptions:

Fig. 1. be a kind of circulation sand-blasting machine structural representation provided by the utility model.

As shown in Figure 1, a kind of circulation sand-blasting machine comprises sand storage case 15, spray gun 3 and supplies sandpipe 13 and recovery tube 12.The end thread of source of the gas passage connects a contraction cone cavity air nozzle 4 in the spray gun 3, the outlet of spray gun 3 is provided with removable double cone shape runner blast nozzle 7, blast nozzle 7 is fixed on the spray gun 3 by nut 6, be provided with around the blast nozzle 7 and reclaim cover 8, the contact jaw that reclaims cover 8 and workpiece 18 is provided with rubber seal 9, the rubber seal 9 outer hairbrush sealing rings 10 that also are with.Sand storage case 15 bottoms heap has emergy, the top is equipped with centrifugal air exhauster 14, be equipped with bag filter 16 below the air exhauster 14, bag filter 16 is a thin steel cylinder, its upper end has suction port, also be provided with filter 17 in the bag filter 16, it is to be made by the filter paper on the rigid net skeleton and the skeleton surface that is laid in.Link to each other with the bottom side of sand storage case 15 for sandpipe 13 1 ends, the other end links to each other with the mulling chamber 5 of spray gun 3, and an end of recovery tube 12 links to each other with the top side of sand storage case 15, and the other end links to each other with the recycling cavity 11 that reclaims cover 8 formation.

By pneumatics unit 1 pressure-air is ejected by air nozzle 4 through air inlet pipe 2 and spray gun 3, when restricted flow becomes free fluid, form negative pressure at air nozzle 4 rears, the emergy that sand storage case 15 bottoms are piled up sucks in the mulling chambeies (negative pressure cavity) 15 through supplying sandpipe 13, and gas, sand spray to workpiece 18 after blast nozzle 7 mixes, here, air nozzle 4 and blast nozzle 7 are dismountable threaded connector, change after being convenient to wear and tear, and needn't change whole spray gun 3, both economical, convenient.Conical because of the source of the gas passage in the air nozzle 4 again for shrinking, the high pressure restricted flow speedup supercharging of flowing through, so in mulling chamber 5, can form high negative, to improve the sand amount of inhaling, and the sand of spray can reach higher pressure, make the high speed sandblast both can be used for the workpiece rust cleaning, can be used for eliminating workpiece weld stress again, accomplish dual-use.Blast nozzle 7 adopts double cone shape runner, and its front tapered runner is convenient to mulling, and the back tapered runner then can strengthen jet angle, improves 2.5 times of sandblast work areas, and the runner angle of flare tapering of blast nozzle 7 can be calculated according to the sandblast current meter.18 of blast nozzle 7 and workpiece have rubber seal 9 and hairbrush sealing ring 10 two seals that emergy and dust can not be leaked, and return sand storage case 15 tops through recovery tube 12 in the recycling cavity 11 that can all rebound.At sand storage case 15 tops centrifugal air exhauster 14 is installed, make sand storage case 15 tops form negative pressure, because dust is different with emergy proportion, emergy enters sand storage case 15 rear portions and follows the double-lined arrow direction and fall into sand storage case 15 bottoms, dust then follows single line arrow A direction and enters bag filter 16, and dust is fully separated with the sand material.Air then follows single line arrow B direction through filter 17 by the impeller of centrifugal air exhauster 14 and arranges outside case.The employing bag filter can be collected more dust and needn't often change, to prolong its service time.

The utility model has the advantage of that it can not only improve operating environment greatly, pollution-free, dust can fully separate with the sand material, and emergy can the automatic recovery, recycle, and the sandblast amount is big, the pressure height, jet angle is big, the scope of application is wide, sandblast efficient height, and vulnerable part is changed conveniently simultaneously. The sandblast diameter is 100mm when prototype test shows the work of this machine, is used for workpiece rust cleaning 20m²/ min, being used for eliminating workpiece stress is 8～10m²/ min, no dust leaks, the emergy long service life.

Claims

1, a kind of circulation sand-blasting machine comprises sand storage case (15), spray gun (3) and separately respectively with sand storage case (15) be connected with spray gun (3) for sandpipe (13) and recovery tube (12), the end thread that it is characterized in that the interior source of the gas passage of said spray gun (3) connects a contraction cone cavity air nozzle (4), the exit of spray gun (3) is provided with the blast nozzle (7) of removable double cone shape runner, be provided with around the blast nozzle (7) and reclaim cover (8), the contact jaw that reclaims cover (8) and workpiece is provided with rubber seal (9) and hairbrush sealing ring (10), the top of sand storage case (15) is equipped with centrifugal air exhauster (14), be equipped with rigidity bag filter (16) below the air exhauster (14), in bag filter (16), be provided with filter (17), link to each other with sand storage case (15) bottom side for sandpipe (13) one ends, the other end links to each other with the mulling chamber (5) of spray gun (3), one end of recovery tube (12) links to each other with the top side of sand storage case (15), and the other end links to each other with the recycling cavity (11) that reclaims cover (8).