CN2130604Y - Spray way direct switching valve mechanism for coating spray gun - Google Patents

Abstract

The utility model relates to a spray way direct switching valve mechanism for coating spray gun. Primarily, a valve seat is arranged on one side of the spray gun head, and the valve seat is used for installing an air pressure switching control valve. The air pressure switching control valve is composed of a valve body, a rotating shaft body, an elastic element and a blocking sheet. When the air pressure switching control valve is in the status of full open or full closed by rotating the rotating shaft body, the blocking sheet can control the air inflow or not inflow into a coating cylinder to switch the mode of different supply coating and prevent the disappearance of the adverse current of the air pressure, the internal pressure in the coating cylinder is maintained, and the micro-gas explosion can be avoided because of the start-up again. The switch motion of the utility model is surely rapid and the delay phenomenon of supply coating can be avoided. The spray way direct switching valve mechanism for coating spray gun has the advantages of cleanness, long service life and simple and convenient operation and usage.

Description

Spray way direct switching valve mechanism for coating spray gun

The utility model relates to a kind of blackwash sprayer, particularly relate to a kind of air pressure conversion direction of controlling, to cooperate required spraying method and conditions such as various different coating working environments, coating article, reach good spraying function and effect, and can avoid being coated with that air inversion loses in the barrel, the direct switching valve body mechanism of the blackwash sprayer spraying method of dismounting spare part again.

General spray gun is that the processing that is used in the coated article surface is handled, and with required or other consideration, the suitable spraying method of essential selection, reach needed perfect effect, so, for with a pair of spray gun, how to have multiple spraying function, it is the target that the spray gun manufacturing industry should make great efforts to improve, therefore, a kind of spray gun is in the past arranged, see also Fig. 1, shown in Figure 2, this spray gun 1 is divided into lance head 1301 haply, spray gun body 1302 and spray gun handle 1303 three parts, spray gun handle 1303 is connected with air compressor, air is contracted in voltage supply can be in spray gun handle 1303 inflow spray guns 1, and be pivoted with plate machine 2 in spray gun body 1302 appropriate positions, whether flow in the spray gun 1 by plate machine 2 control air, lance head 1301 is used to spray coating, and be equipped with whirligig 3 at its front end place spiral shell, to be spray lids 3301 of being provided with two discharge orifices 1301 ' by inside cover 3301 nuts 3302 that are fixed on lance head 1301 front end places and constituted with will spraying whirligig 3, and portion is provided with the air room 3303 that communicates with the runner 1302 ' of spray gun body 1302 within it, be provided with coating room 4 in lance head 1301 central cross, coating room 4 inwalls are screw-like, solid for nozzle 5 spiral shells, nozzle 5 centers connect and are provided with discharge opening 5301, outer circle 5302 inner loop at nozzle 5 front ends are provided with pore 5303, form the end 6 that is spirally connected in lance head 1301 bottom surfaces, for being spirally connected coating cover 7, end 6 internal run-throughs that are spirally connected are provided with the through hole 6301 that communicates with coating room 4, and there is body 8 to be sheathed in the through hole 6301, carry for coating, in air room 3303 and appropriate location below lance head 1301, position be provided with perforation to the air intake duct 9 of end in 6 that be spirally connected, so that flowing to air flue port 9301 through air intake duct 9, the part pressure-air enters in the coating cover 7, and be provided with the threaded portion 9302 of suitable length at the front end of air intake duct 9, be provided with screw 7301 and run through, place in it for jam bolt 7302 spiral shells in coating cover 7 appropriate positions:

Then, it is shown in Figure 2 please to continue to consult Fig. 1 again, and when wanting application, as long as apply an active force in plate machine 2, make pressure-air flow between the spray lid 3301 of nozzle 5 and whirligig 3 through the runner 1302 ' of spray gun body 1302 from spray gun handle 1303, the pore 5303 that cover 3301 ones discharge orifice 3301 ' and nozzle 5 from spray sprays (the detailed enlarged drawing as 301 positions of Fig. 1 is promptly shown in Figure 2) at last, and cover 3301 and during the outflows of 5 at nozzle from spray at pressure-air, the part pressure-air enters air intake duct 9 to air flue port 9301 from air room 3303, flow into through coating cover 7 and to be coated with in the barrel 900, when pressure-air continues to be coated with in the barrel 900 from air intake duct 9 inflows, and cause the pressure that is coated with in the barrel 900 enough greatly the time, then be contained in the material that is coated with in the barrel 900, promptly can be extruded, and from body 8 via through holes 6301, flow to again in the coating room 4, and then flow into the discharge opening 5301 of nozzle 5, and be the power-assisted of extruding by air because of coating, so, denseer sticking mobile relatively poor coating is easier to the discharge opening 5301 of nozzle 5, cooperate pressure-air when the 3301 ' ejection of 3301 aperture cover in spray, reach the purpose that is the denseer coating that glues of atomizing spraying.

Please consult Fig. 3 again, if during the generally thinner lacquer of spray, then as long as just coating can be drawn in the discharge opening 5301 of nozzle 5 by siphonage, must flow into the pressure-air that is coated with in the barrel 900 through air intake duct 9 with part and close this moment, therefore, at first the nut 3302 of whirligig 3 must be screwed out, cover 3301 to take out spray, and dismantle nozzle 5 again, then jam bolt 7302 is screwed out from screw 7301, then, spiral shell is put in the threaded portion 9302 of air intake duct 9 front ends again, and is last, again with nozzle 5, the spray cover 3301 and nut 3302 reinstall, so, just can reach to hinder and close pressure-air and enter and be coated with in the barrel 900, so pressure-air can be all sprays with spraying to cover between 3301 discharge orifice 3301 ' from the pore 5303 of nozzle 5, can be the siphon shape and draw coating, to reach the purpose of the thinner lacquer of general spraying; So, put spiro union portion 9302 by jam bolt 7302 spiral shells at air intake duct 9, so that coating enters the discharge opening 5302 of nozzle 5 by air extrusion or siphon mode, just can reach dense lacquer of spray and the thin lacquer of spray, or a large amount of spraying and the purpose of spraying in a small amount; But in the actual use of workmen, operation, there is following shortcoming in the design of above-mentioned spray gun:

One, be " opening " or " pass " state in order to switch air intake duct 9, with reach the change spraying method purpose the time, must be earlier with the lid of the spray in the whirligig 3 3301, parts such as nut 3302 and nozzle 5 are dismantled in regular turn and are taken off, then, re-use hand-held tools such as screwdriver, spiro union portion 7301 is put or screwed out to jam bolt 7302 spiral shells, then, again with the lid of the spray in the whirligig 3 3301, parts such as nut 3302 and nozzle 5 restore to the original state, so, along with needs or do not need to borrow pressure air force feed coating and when making switch operating, it need carry out above-mentioned steps and just can finish, so, when it switched air intake duct 9 for " pass " or " opening ", the step trouble was also lost time, and need hand-held tool just can carry out switch operating again.

They are two years old, when doing air intake duct 9 for the switch operating of " pass " or " opening ", all need to dismantle jam bolt 7302, and jam bolt 7302 volumes too little (external diameter and length are about about 3mm), so, cause the thread damage and loss of jam bolt 7302 easily, and the pitch because of thread is finer again, so, when jam bolt 7302 spiral shells are put in screw 7301, easier thread damage and the paint of making at work glues plug, and then causes spray gun 1 can not remake switch operating.

They are three years old, when carrying out the work of spraying paint of low pressure force feed, and need temporarily stop painting work the time, because air intake duct does not have jam bolt 7302 sealings 9 this moments, so, the air that is coated with in the barrel 900 can release via air intake duct 9, makes in the time of must remaking painting work, after need waiting for a period of time, allow the air pressure that is coated with in the barrel 900 reach the state that is enough to make crowded past body 8 outflows of coating, so, when carrying out application again after the break-off, can produce the phenomenon that feed postpones.

They are four years old, after aforementioned break-off, again under the variation of work, make when pressure-air enters in the spray gun 1 again, can be coated with in the barrel 900 because of flowing into rapidly, and cause pressure-air rapid expansion in being coated with barrel 900, and cause little gas explosion to produce, the generation meeting of this little gas explosion is decided along with suspending count, therefore, can produce harmful effect to being coated with barrel 900.

They are five years old, when closing at the thin lacquer of spray and with the spiro union portion 9302 of air intake duct 9 with siphon mode, then screw 7301 is put because of the spiral shell that is not subjected to jam bolt 7302, and present open shape, and in painting process, spray gun needs moving of upper and lower, left and right, and cause the coating that is coated with in the barrel 900 can form fluctuation, under the situation that is coated with the some angles of barrel 900 inclinations, part coatings can flow out from screw 7301, except causing waste of material, can cause the surface that is coated with barrel 900 unclean again, and screw, thread are clung by coating and block, cover.

They are six years old, be coated with barrel 900, coating cover 7, body 8 when pulling down, reach jam bolt 7302 plug screws in air intake duct 9 threaded portions 9302, because the air intake duct 9 of position in the end 6 that is spirally connected, its air flue port 9301 is that the position is at 6302 places, inclined-plane that are spirally connected end 6, so, when doing the high pressure force feed and spraying in a large number, when its end 6 that is spirally connected is will be with the body 8 of force feed coating affixed, between must add that part blocks liner 9303 and could use, but it is too little that it blocks liner 9303, normal loss and damage arranged and the defective of seepage coating.

The direct switching valve body mechanism that main purpose of the present utility model provides a kind of blackwash sprayer spraying method is to be arranged on the valve seat of the first side of spray gun of spray gun by the air pressure switchover control valve, enter and be coated with in the barrel with the control air, make the utility model not need hand-held tool, just can be according to spray dense lacquer or thin lacquer, and in a large number or the working environment that sprays paint on a small quantity and doing the at any time work of switching save time and coating more can keep peace and quiet practicality to reach.

Secondary objective of the present utility model provides a kind of direct switching valve body mechanism of coating spraying method, is by the air pressure switchover control valve.Has non-return effect, make when break-off, the air that is coated with in the barrel can't adverse current, and permanent maintenance is coated with the interior air pressure of barrel with identical at first, in the time will working again, be coated with and do not have moment inflation in the barrel and produce the time difference phenomenon that little gas is sudden and violent and supply pressure, and can carry out the spraying work of countless repetitions immediately:

It is the outer appropriate position of thread that is arranged on the end that is spirally connected by air duct that a purpose more of the present utility model provides the direct switching valve body mechanism of a kind of blackwash sprayer spraying method, be coated with barrel, coating cover, body when pulling down, the knob of rotation axis body screwed close, when doing the high pressure force feed and spraying in a large number, when the scalene cone that is spirally connected in the port is will be with force feed coating body affixed, needn't blocks liner fully in addition in the middle of it and just can use.

The purpose of this utility model is realized by following technical scheme, the direct switching valve body mechanism of the utility model blackwash sprayer spraying method, be whirligig to be set at the lance head front end, be formed with the air room in the lance head interior forward end, and be formed with the coating room that communicates with the air room in the rear end, the air room communicates with the gas off-take that circulates for pressure-air, so that pressure-air sprays via the air room, be provided with the end that is spirally connected in the lance head bottom surface, be spirally connected to hold to be equiped with and be coated with barrel, the inner through hole that communicates with the coating room that is provided with of the end that is spirally connected, and in through hole, be equipped with body, the nozzle spiral shell is put at coating room front end, and nozzle center connects and is provided with discharge opening, is equipped with nozzle needle on the discharge opening, when the coating that is coated with barrel flows in the coating room by body, via the discharge opening of nozzle, just can be spray painting and go out application again, be primarily characterized in that with pressure-air:

On bolt apertures, be concaved with valve seat in first side of spray gun and position, the valve seat bottom surface is provided with the air intake duct that communicates with the air room, it flows into for the part pressure-air, be that pressure-air is flowed in the air intake duct by the air room, and be provided with towards the passage of the thread appropriate position of the end that is spirally connected in the valve base inner wall appropriate position, so that being flow to be spirally connected to hold and then flow into by passage again, pressure-air is coated with in the barrel.

Also include the air pressure switchover control valve, the hub setting of air pressure switchover control valve is in valve seat, it is made of valve body, rotation axis body, flexible member and barrier sheet, the valve body spiral shell is put in valve seat, and the rotation axis body is set in the valve body, be concaved with containing hole in rotation axis body bottom, containing hole is nested with for the elasticity element, and barrier sheet also is to be nested with in the containing hole of rotation axis body, and the position is on the flexible member bottom, with make by the structure of the elastic force of flexible member and rotation axis body the air pressure switchover control valve can be forward, move backward.

The purpose of this utility model can also further be realized by following technical measures:

The pre-position is provided with through hole on the valve body, and it flows into for air.The oblique shape anchor ring of circle in valve body bottom inner edge is formed with, and the oblique shape anchor ring of circle is formed with conus portion in rotation axis body bottom cooperates, so that the conus portion of valve body bottom and rotation axis body bottom fits tightly.

Concrete structure of the present utility model is provided in detail by following examples and accompanying drawing thereof, below by most preferred embodiment and accompanying drawing the direct switching valve body mechanism of blackwash sprayer spraying method of the present utility model is elaborated.

Fig. 1 is the cross-sectional schematic of spray gun in the past.

Fig. 2 is the detailed structure enlarged drawing at 301 positions among Fig. 1.

Fig. 3 is the action schematic diagram of spray gun in the past.

Fig. 4 is the spray gun schematic appearance of the utility model preferred embodiment.

Fig. 5 is the air pressure switchover control valve exploded perspective schematic diagram of the utility model preferred embodiment.

Fig. 6 is the air pressure switchover control valve combination schematic perspective view of the utility model preferred embodiment.

Fig. 7 is air intake duct, valve seat and the passage schematic perspective view of the utility model preferred embodiment.

Fig. 8 is the spray gun partial schematic sectional view of the above-mentioned preferred embodiment of the utility model.

Fig. 9 is the detailed structure enlarged drawing at 800 positions among Fig. 8.

Figure 10 is another partial schematic sectional view of spray gun of the above-mentioned preferred embodiment of the utility model.

Figure 11, the 12nd, the spray gun action schematic diagram of the above-mentioned preferred embodiment of the utility model.

Please cooperate that to consult Fig. 4 Fig. 8 shown in Figure 9, it is the direct rotary valve body mechanism of the utility model blackwash sprayer spraying method, spray gun 10 is integrated, it divides into the lance head 11 for the coating ejection, supplied gas circulation also is connected with at the spray gun body 12 of lance head 11 back and the three parts such as spray gun handle 13 that are connected with in spray gun body 12 back lower places and grip for the user, be pivoted with plate machine 121 in appropriate location, spray gun body 12 outside, and portion is provided with the gas off-take 122 of supplied gas circulation within it, lance head 11 front end spiral shells are equipped with whirligig 20, whirligig 20 be by the spray cover 21 and nut 22 constituted, and be provided with air room 14 in lance head 11 interior forward end, be provided with stair-stepping coating room 15 and communicate laterally and with air room 14 in lance head 11 inside center, air room 14 communicates with gas off-take 122, and coating room 15 place in the middle of front end is provided with threaded portion 151, shown in the detailed enlarged drawing of Fig. 9, in addition, extension being provided with the end 16 that is spirally connected downwards in lance head 11 bottom surfaces, for 30 installings of coating cover, appropriate position, coating cover 30 top connects and is provided with air duct 31, and its bottom surface be coated with barrel 40 and be spirally connected, end 16 inside middle that are spirally connected are provided with the through hole 161 that communicates with coating room 15, and in through hole 161, be equipped with body 50, nozzle 17 spiral shells are put in the threaded portion 151 of coating room 15 front ends, nozzle 17 centers connect and are provided with discharge opening 171, be nested with for nozzle needle 60, when the coating that is coated with barrel 40 flows in the coating room 15 by body 50, via the discharge opening 171 of nozzle 17, just can be vaporific ejection application again with pressure-air.

See also Fig. 7, Fig. 8, shown in Figure 9, creation characteristic of the present utility model is that the end that is being spirally connected in lance head 11 1 sides and position is concaved with valve seat 18 valve seats 18 inwalls on 16 and is screw-like, and be provided with the air intake duct 181 that communicates with air room 14 in valve seat 18 bottom surfaces, for partly pressure-air inflow, be provided with the passage 182 of the external screw teeth appropriate position that leads to the end 16 that is spirally connected in valve seat 18 inwall appropriate positions, passage 182 communicates with the air duct 31 of coating cover 30, so that pressure-air flow to passage 182 through air intake duct 181, be coated with in the barrel 40 by air duct 31 inflows again.

70 hub settings of air pressure switchover control valve are in valve seat 18, see also Fig. 5, shown in Figure 6, air pressure switchover control valve 70 is by valve body 71, rotation axis body 72, flexible member 73 and barrier sheet 74 constitute, valve body 71 spiral shells are put in valve seat 18 (with reference to Fig. 7, Figure 10, Figure 11, shown in 12), and general T-shaped shape, heart place connects and is provided with guide hole 711 therein, be provided with the through hole 712 that communicates with guide hole 711 in its pre-position, top, the oblique shape anchor ring 713 of circle in its bottom inner edge is formed with, rotation axis body 72 spiral shells are through in the guide hole 711 of valve body 71, be provided with knob 721 on its top, and the oblique shape anchor ring 713 of circle in cooperating, be formed with conus portion 722 in its bottom, so that conus portion 722 can be close to driving fit with the oblique shape anchor ring 713 of interior circle, and be concaved with the containing hole 723 of suitable length in its bottom, flexible member 73 is nested with (flexible member 73 in containing hole 723, at present embodiment is to be example with the spring), barrier sheet 74 is inverted T-shaped, it is nested with in the containing hole 723 of rotation axis body 72, and the position is on flexible member 73 bottoms.

Operating principle of the present utility model, see also Figure 11, shown in Figure 12, when pushing coating by air, with reach the spray dense lacquer purpose the time, need only the rotation axis body 72 of rotary air pressure switchover control valve 70 during use and be the standard-sized sheet shape, the meaning of standard-sized sheet is that the oblique shape anchor ring 713 of interior circle of conus portion 722 and the valve body 71 of rotation axis body 72 is and is close to the driving fit shape, as Figure 11, shown in Figure 12, and make barrier sheet 74 is the compacting that is not subjected to rotate the conus portion 722 of axis body 72, but, barrier sheet 74 is subjected to the elastic force effect of flexible member 73 and closes air intake duct 181, when making pressure-air enter in the spray gun 10 when spraying paint work, pressure-air can flow into (with reference to shown in Figure 8) nozzle 17 from gas off-take 122 respectively and spray the preceding splaying ejection of covering 21, there is the part pressure-air can flow into air intake duct 181 in addition, please refer to Figure 11, shown in Figure 12, and its pressure is during greater than flexible member 73, pressure-air just can be pushed barrier sheet 74(such as Figure 11 open, shown in Figure 12), and in the flow channel 182, and flow into again through air duct 31 and to be coated with in the barrel 40 (with reference to Figure 11, shown in Figure 12), so, be coated with barrel 40 and be full of pressure air, then coating just can be subjected to air extrusion, and in body 50 flow to coating room 15, and flow to discharge opening 171 again, then along with pressure-air is the ejection of atomizing shape, because coating is subjected to the air pressure extruding and flows out from body 50, so, so just can reach the purpose of the dense lacquer of spray, this is because utilize the air extrusion, the coating that can make denseer mobile difference makes and can spray denseer sticking coating than the discharge opening 171 that is easier to be fed into nozzle 17.

Among work is carried out, when needing break-off, pressure-air just can not flow in the spray gun 10 again, and the part pressure-air also no longer flows in the air intake duct 181, so, barrier sheet 74 be not subjected under the pressure-air promotion, can be pushed back air intake duct 181 states (as shown in figure 11) of closing by flexible member 73 again, therefore, be coated with the air pressure in the barrel 40, just can't form non-return effect from passage 182 adverse currents to air intake duct 181, so that be coated with the barrel 40 permanent certain pressures that keep, and will continue to spray paint work again the time, be coated with and do not have the moment inflation in 40 of the barrels and produce little gas explosion and supply the time elementary errors of air pressure, and can carry out the work of spraying paint of countless repetitions immediately:

See also shown in Figure 10, and when using siphon principle to draw coating, when reaching the purpose of a small amount of spraying to reach the thin lacquer of spray, need only the rotation axis body 72 of rotary air pressure switchover control valve 70 and be the complete shut-down shape, the meaning of complete shut-down is that conus portion 722 front end faces of rotation axis body 72 are tightly suppressed barrier sheet 74 and closed air intake duct 181, as shown in figure 10, making air intake duct 181 be blocked sheet 74 blocks and interrupts and can't communicate with passage 182, therefore, pressure-air just can only be from the gap ejection of 21 of nozzle 17 and cappings, and the pressure-air that flow through rapidly in nozzle 17 ports this moment can form siphon, so, coating just can flow out (please refer to shown in Figure 9) from being coated with to be drawn in the barrel 40, because coating utilizes siphon principle to flow out from being coated with barrel, so it just can reach the purpose of the thinner lacquer of spray and a small amount of spraying, because it is lighter to utilize siphon principle to draw, the coating that does not have viscosity is so can only spray thinner lacquer.

Advantage of the present utility model is described below:

One, the utility model is when carrying out standard-sized sheet, complete shut-down switch operating, do not need hand-held tool, do not need to rotate the action of dismounting screw yet, and need only rotary air pressure switchover control valve 70, just can reach easily the purpose of standard-sized sheet, complete shut-down switching, so, can exempt and use hand-held tool and the trouble of dismantling screw, therefore, change action of the present utility model is really rapid, and can not lose time again.

Two, air pressure switchover control valve 70 of the present utility model is forever to be screwed in the valve seat 18, so the utility model air pressure switchover control valve 70 can't be lost, and causes the defective that can not make standard-sized sheet, complete shut-down switch operating.

Three, air pressure switchover control valve 70 of the present utility model is when break-off, by flexible member 73 and the barrier sheet 74 non-return effect that forms, so that the air pressure in the coating cylinder 40 can't be released, so, in the time of will reworking again, do not need to wait for whether the air pressure of coating cylinder 40 is enough, just can carry out painting work at once, therefore, the utlity model has feed and do not have the practicality that delay phenomenon produces.

Four, keep certain based on the air pressure in the aforementioned coating cylinder 40 is permanent, so, when the work of spraying paint again, and make pressure-air enter again coating cylinder 40 when interior, then in the situation that existing air pressure exists, so that flow into again pressure-air in the coating cylinder 40, can't produce little gas explosion to coating cylinder 40, to guarantee the long service life of coating cylinder 40.

Five, air pressure switchover control valve 70 is that position side and being spirally connected lance head 11 outside is held above in the of 16, but not in the interior plant air room 14, So outside it was easy to operate, most importantly, it can not attach coating, so that the utility model can keep than clean conditions.

Six, air pressure switchover control valve 70 of the present utility model, when making the switch operating of standard-sized sheet, complete shut-down, coating cylinder 40 is to be the sealing shape forever, so, lance tube does not move as upper and lower, left and right, even coating cylinder 40 is when tilting certain angle, and neither meeting causes the coating in the coating cylinder 40 to spill into the outside, and makes coating cylinder 40 surfaces forever clean.

When seven, the utility model conversion is done the high pressure force feed and sprayed in a large number, needn't dismounting change employed jam bolt and the standby liner that blocks in addition, just can directly use spraying, not lose part and damage the defective of seepage coating, the operation use is simple and easy.

In sum, the utility model obviously can improve the defective of conventional art, makes the work that must be engaged in switching simply easy, not having again the feed delay phenomenon produces, so the utility model is really very practical, in fact be one to have the new design of novelty, creative and practicality.

Claims (3)

1, the direct switching valve body mechanism of a kind of blackwash sprayer spraying method, it is at the lance head front end whirligig to be set, be formed with the air room in the lance head interior forward end, and be formed with the coating room that communicates with the air room in the rear end, the air room communicates with the gas off-take that circulates for pressure-air, pressure-air sprays via the air room, the lance head bottom surface is provided with the end that is spirally connected, be spirally connected to hold to be equiped with and be coated with barrel, the inner through hole that communicates with the coating room that is provided with of the end that is spirally connected, be equipped with body in the through hole, coating room front end spiral shell is equipped with nozzle, and nozzle center connects and is provided with discharge opening, be equipped with nozzle needle on the discharge opening, the coating that is coated with barrel flows into the interior discharge opening via described nozzle of coating room by described body, is vaporific ejection with pressure-air, it is characterized in that:

The first side of spray gun and the position be spirally connected the end on be concaved with valve seat, the valve seat bottom surface is provided with the air intake duct that communicates with the air room, pressure-air is flowed in the air intake duct by the air room, valve base inner wall is provided with the passage that leads to the end that is spirally connected, and pressure-air is flow to be spirally connected to hold and then flow into by passage again and is coated with in the barrel;

The direct switching valve body mechanism of described blackwash sprayer spraying method includes the air pressure switchover control valve, the hub setting of air pressure switchover control valve is in described valve seat, it is made of valve body, rotation axis body, flexible member and barrier sheet, the valve body spiral shell is put in described valve seat, the rotation axis body is set in the valve body, and rotation axis body bottom is concaved with containing hole, and containing hole is nested with for the elasticity element, barrier sheet is nested with in the containing hole of described rotation axis body, and the position is on the flexible member bottom.

2, the direct switching valve body mechanism of blackwash sprayer spraying method according to claim 1, it is characterized in that: valve body is provided with through hole.

3, the direct switching valve body mechanism of blackwash sprayer spraying method according to claim 1 is characterized in that: valve body bottom inner edge is formed with the oblique shape anchor ring of interior circle, and the bottom cooperation of rotation axis body is somebody's turn to do the interior oblique shape anchor ring of circle and is formed with conus portion.

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