CN201613510U

CN201613510U - Sand blasting head with highly concentrated impact force

Info

Publication number: CN201613510U
Application number: CN2010201543981U
Authority: CN
Inventors: 刘成
Original assignee: Chengdu Aircraft Industrial Group Co Ltd
Current assignee: Chengdu Aircraft Industrial Group Co Ltd
Priority date: 2010-03-31
Filing date: 2010-03-31
Publication date: 2010-10-27
Anticipated expiration: 2020-03-31

Abstract

The utility model relates to a sand blasting head with highly concentrated impact force for a sand blasting machine. A sand blasting nozzle comprises a sand blasting sleeve (2) and a sand blasting drum (3), wherein the sand blasting sleeve (2) is movably assembled and connected in a front sand blasting connector (1) and is provided with a tapered flared air tap (6); and the tapered flare of the sand blasting sleeve (2) extends backwards to the end surface at the bottom of the sand blasting drum (3), thus forming a flared air inlet passage the diameter of which is increased gradually from inside to outside. The sand blasting head utilizes aerodynamics for extending the tapered flare of the sand blasting sleeve to the sand blasting drum, and further increasing the passing stroke of high-pressure air-flow sand and the impact force with higher concentration ratio; and under the same pressure, the output speed of the sand blasting material is increased by more than one time, the working efficiency is improved by 15 to 40 percent than that of a straight-hole sand blasting gun, and the consumption of sand blasting material is reduced by 20 percent. The sand blasting drum is internally provided with an annular air vent which has cooling function, thus solving the problems that the front sand blasting connector and the sand blasting drum are heated easily, have ultrahigh temperature, and are easily deformed, and the sand blasting sleeve is replaced frequently.

Description

High concentration degree impulsive force blowhead

Technical field

The utility model is the blowhead about abrasive blast equipment.

Background technology

The prior art process of surface treatment, blowhead in the blowing machine, it comprises sandpipe and goes out blast pipe and the blowhead that the sandpipe rear end is connected, blowhead is to utilize aerodynamics, high velocity air from high pressure positive blower blows out produces a very big negative pressure at blast pipe, and ambient air is drawn in the sand-blasting gun, inhale the moving sand material that falls from sand mouth mouth, and under the promotion of follow-up air-flow, blow to the blast mouth device of surface of the work.Be to be used for all size part, particularly part Combination Welding part as: after steel part, foundry goods, aluminum component were stained with fire or annealing, the high pressure blast was removed and to be stained with a critical component of fire or annealing surface oxide layer.Because the frequency height that blowhead uses, consumption is big.In use, all to change the blowhead annex nearly every day, the blast cover 2 in the blast front connector.This blast by ceramic making overlaps not only will be changed one every day and abandon as waste product, contaminated environment, and change loaded down with trivial details, needs 5-10 of every replacing minute.When work, because, the blast cover of forming by flat segments and contraction section, because can't overcome the vortex phenomenon that entrance point exists, the pressure loss is big, often under the effect of abrasive material outlet high speed sand grains movement air flow, heating easily, temperature is too high and be easy to generate distortion, reduces the concentration degree of high pressure draught, reduces the ability of removing the piece surface oxide layer.With blast cover rear end loudspeaker concentric connection of inlet, the straight tube inner chamber of blast tube that is interconnected, when passing through owing to high pressure draught and sand grains, stroke is too short, and air-flow is not concentrated, and the pressure loss is big, the blast media muzzle velocity reduces, and causes gas shock power to diminish, and the piece surface oxide layer is difficult for removing.

Summary of the invention

The purpose of this utility model is to overcome the weak point that above-mentioned prior art exists, and provides a kind of gas shock power more concentrated, and it is few that consumable accessory is changed number of times, and long service life can reduce the high concentration degree impulsive force blowhead of technology cost.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of high concentration degree impulsive force blowhead, comprise, one with the concentric back joint that is connected of blast tracheae, a sandblast mouth of forming by blast front connector and blast tube, it is characterized in that, described blast mouth comprises that a movable assembling is connected in the blast front connector, and the blast that has the conical horn valve overlaps and the blast tube, the conical horn of this described blast cover extands rearward to the bottom end face of described blast tube, and then forms the tubaeform air intake air flue that an ascending flaring extends.

In the cylindrical shell of described blast tube (3), be shaped on the ring-shaped ventilation of the cylinder that is periphery.

The utility model has following beneficial effect than prior art.

The utility model utilizes aerodynamics, and the conical horn that blast is overlapped extands rearward to the blast tube, forms the tubaeform air intake air flue of lengthening that flaring extends, and the air capacity that makes ejection is greater than amount of air drawn.Further increase the high pressure draught sand grains by stroke and the bigger impulsive force of concentration degree, the entrance point vortex phenomenon is obviously improved or has not been existed, and the pressure loss reduces greatly.Further concentrating of high pressure draught, the oxide layer that makes piece surface be difficult to remove can be subjected to the direct strike of sand grains motion, is particularly suitable for the blasting treatment technology of difficult finished surface.Under the uniform pressure condition, the muzzle velocity of sandblast material can double above, and operating efficiency improves 15%-40% than straight hole sand-blasting gun, and the consumption of sandblast material reduces by 20%.The aerodynamics performance is better than the straight hole rifle.

The ring-shaped ventilation hole that has cooling effect in the blast tube cylindrical shell has solved the blast front connector and the blast tube generates heat easily, and temperature is too high, and is yielding, and the blast cover is changed the frequent problem of number of times.Because the blast cover is that activity is assemblied in the connecting hole of blast front connector, so the blast cover changed production cost efficient and convenient, low, improved production efficiency.

Description of drawings

Fig. 1 is the cutaway view of the high concentration degree impulsive force of the utility model blowhead.

Fig. 2 is the cutaway view of blast cover among Fig. 1.

Fig. 3 be the B-B of Fig. 2 and A-A to cutaway view.

Among the figure: 1 blast front connector, 2 blast covers, 3 blast tubes, 4 back joints, 5 blast tracheaes, 6 conical horn valves, 7 ring-shaped ventilation holes, 8 valves, 9 radial bolts, 10 radial holes.

The specific embodiment

Consult Fig. 1, the described high concentration degree impulsive force blowhead of the utility model comprises, one with the blast tracheae 5 concentric back joints 4 that are connected, this back joint 4 connects firmly blast tracheae 5 in air admission hole by the radial bolts on its periphery 9.A sandblast mouth of forming by blast front connector 1 and blast tube 3.This blast mouth has a concentric locking collar to be contained in the blast front connector 1, and have the blast cover 2 and a coaxial blast tube 3 that links to each other of conical horn, the screw thread step of blast tube 3 front ends connects as one by the interior step screwed hole of blast front connector 1 end, and the blast that will have a conical horn overlaps in the 2 coaxial straight section holes that are fixed on described blast front connector 1.Blast cover 2 as shown in Figure 2 is shaped on conical horn valve 6, this conical horn extends back and connects above-mentioned blast tube 3 conical horns, and connect back joint 4 by the step that extends axially on its bottom end face, forms an ascending connection one, the tubaeform air intake air flue of flaring extension.

Consult Fig. 2～Fig. 4.Be shaped on ascending flaring and extend the ring-shaped ventilation hole 7 that is shaped on the cylinder that is periphery in its cylindrical shell of blast tube 3 of flaring air intake air flue, this ring-shaped ventilation hole can be uniform along the parallel bus of its cylinder, also can be the distributed layout that parallels with its tubaeform air intake air flue shown in the figure.Ring-shaped ventilation hole 7 communicates with atmosphere by radial hole 10.Cold air can be by the valve 8 in the blast tube 3, ring-shaped ventilation hole 7 from blast tube 3 end face annular grooves enters, cool air-flow then flows out from the radially pore of the B-B annular layout of blast tube 3, take away the excessive temperature that the effect of high speed sand grains movement air flow issues thermal energy and generation, reduce the interior force deformation of heat of blast tube.

Blast cover 2 in the blast front connector 1 has light weight to select for use, density is little, Wear-resistant, high-temperature resistant, make with the whole alloy material of strong acid and strong base Fails To Respond.Also can be that Mohs' hardness is 9.36, microhardness be 5400～6300 Kilograms Per Square Meters, and density is 2.52 kilograms every square metre, and fusing point is 2450 degrees centigrade, and six sides are that the hardest boron carbide artificial material of furvous is made.The boron carbide material of selecting for use can replace materials such as known carbide alloy and carborundum, silicon nitride, aluminium oxide, zirconia, and the life-span can reach 1,000 hours internal diameter abrasive jet wear 1-2 millimeters, reduces it and changes number of times.As in blasting craft, be 5～12 times of wolfram steel its friction durability, and the technology cost obviously reduces, and work efficiency obviously improves.

After high pressure cold air-flow and sand grains mixing, mix import through high pressure cold, enter fast in blast tube 3 inner chambers by blast tracheae 5, the taper surface loudspeaker air flue that sand grains and high pressure draught are concentrated, form the high pressure focused airflow, produce the impulsive force of removing the oxide layer of assaulting fortified position; Sand grains stream impacts the surface of the work oxide layer by blast cover 2 outlets that joint behind the blast connects, and the surface of the work oxide layer is removed.

Claims

1. one kind high concentration degree impulsive force blowhead, comprise, one with the concentric back joint (4) that is connected of blast tracheae (5), a sandblast mouth of forming by blast front connector (1) and blast tube (3), it is characterized in that, described blast mouth comprises that a movable assembling is connected in the blast front connector (1), and have the blast cover (2) and a blast tube (3) of conical horn valve (6), the conical horn of this described blast cover (2) extands rearward to the bottom end face of described blast tube (3), and then forms the tubaeform air intake air flue that an ascending flaring extends.

2. high concentration degree impulsive force blowhead as claimed in claim 1, it is characterized in that, be shaped on the ring-shaped ventilation hole (7) of the cylinder that is periphery in the cylindrical shell of described blast tube (3), described ring-shaped ventilation hole is uniform along the parallel bus of its cylinder, or the distribution that parallels with its described tubaeform air intake air flue.

3. high concentration degree impulsive force blowhead as claimed in claim 1, it is characterized in that, the screw thread step of described blast tube (3) front end connects as one by the interior step screwed hole of blast front connector (1) end, and will have in the coaxial straight section hole that is fixed on described blast front connector (1) of the blast cover (2) of conical horn.

4. high concentration degree impulsive force blowhead as claimed in claim 1 is characterized in that described blast cover (2) is made by whole alloy material.

5. high concentration degree impulsive force blowhead as claimed in claim 1 is characterized in that, described blast cover (2) is that dark-coloured boron carbide artificial material is made by six sides.