CN203556486U - Spray gun - Google Patents

Abstract

The utility model provides a spray gun which includes a spray gun body. The spray gun body includes a gun body head used for being connected with a nozzle, an upper gun body abutted with the gun body head, and a handle attached to the upper gun body, wherein at least one horizontal air passage is formed in the spray gun body, and the horizontal air passage starts at the end of the gun body head and ends inside the upper gun body. The spray gun provided by the utility model can overcome multiple defects in the prior art, the manufacture is easier, and the functionality of the spray gun is not affected.

Description

Spray gun

Technical field

The utility model relates to a kind of spray gun, especially a kind of blackwash sprayer.

Background technology

Spray gun is a kind of instrument conventional in industry, and for example, it can be for being ejected into coating on the surface such as the various objects of furniture, machine and especially vehicle (corresponding automobile body).Spray gun can comprise for holding the watering can of sprayed on material and for the spray gun body of spray paint material.Watering can be arranged on upside, downside or the cross side of spray gun.When watering can is arranged on upside, spray gun is called gravity type spray gun, and when watering can is on downside, it is hydrocone type or pressure sending type spray gun, and it is called side sprinkling can type spray gun when spray gun has horizontal watering can.Substitute watering can, spray gun can also comprise with pressurized tank or to spray gun supplies with the flexible pipe that the pump of coating is connected.

Fig. 1 shows the cutaway view of the gravity type spray gun of prior art.Spray gun 1 comprises single-piece spray gun body 2, and spray gun body has handle 21, upper gun body 22 and rifle body head 23.Via air connector 3 to spray gun supplied with compressed air.On upper gun body 22, be formed with watering can connector 4, by watering can connector 4, watering can be connected to spray gun.

The compressed air that is supplied to spray gun 1 is directed into air nozzle 5, and air nozzle 5 is the circular ports around paint spray nozzle 6.Compressed air is blown into the outside of air nozzle 5 under pressure, produces vacuum thus and coating is drawn onto to the outside of paint spray nozzle 6.In addition, the pressure-acting of the coating by below makes coating be forced out nozzle 6.In the situation that spray gun is gravity type spray gun, due to Action of Gravity Field, the direction along nozzle 6 flows coating, in the situation that spray gun is hydrocone type or pressure sending type spray gun or in the situation that via flexible pipe by the paint supply from paint can to spray gun, coating flows along the direction of nozzle due to pressure-acting.When coating flows to paint spray nozzle 6 outside, coating is atomized and is blown in forward direction.Here, produce cone shape circular spray (round spray) substantially.

Yet for multiple spraying and powdering work, it is preferred that plane is sprayed, this is because can spray larger surface in the shorter time.In addition, it can realize more even and more effective coating.Therefore, most of spray guns have two horizontal blast cap angles 7 on air nozzle, and its direction of spraying along coating is outstanding.These two blast cap angles 7 are also supplied to compressed air.Compressed air is released by the one or more blast caps angle air nozzle 71 in each blast cap angle.In most of situations, nozzle 71 is cylindrical holes, but they also can have other shapes.Many spray guns all have two different blast cap angle nozzles of diameter in each blast cap angle.Blast cap angle air is directed into coating injection and from both sides, makes its distortion.Thus, coating sprays and becomes smooth.Be injected in and in the direction that blast cap angle air exposure goes out, diminish and on other both direction, become large.Air nozzle and thus blast cap angle can rotate around jet axis, thus, can change the angle that the plane relevant to spray gun sprayed.In most of situation, expectation be vertical injection.The deformation extent that amount and pressure by blast cap angle air can regulate injection.For this reason, most of spray gun all to have compressed air distributor 8(only schematically illustrated in Fig. 1).By this compressed air distributor 8, from the compressed air of air supply part 9 along two different channel separation.One of them passage (so-called circular injection channel) is supplied with compressed air to air nozzle 5, and another passage (so-called plane injection channel) is 7 supply compressed air to blast cap angle.Can regulate the air of these two passages is distributed by compressed air distributor 8.

Fig. 2 shows the plan view of spray gun shown in Fig. 11, wherein shows spray gun body 2, and this spray gun body has rifle body head 23 and for the hole of compressed air distributor 8.

Fig. 3 shows the front view of the body of spray gun shown in Fig. 2.Can find out, rifle body head 23 has blind hole 10, and its admission of air distributes the pin (not shown in this Figure) of ring.The position of blind hole is not optional.It limits the arrangement that air distributes ring together with distributing the pin on ring with air, and air distributes ring must have suitable position with respect to hole 12 and 13, and hole 12 and 13 is ends of aforementioned circle injection channel and plane injection channel.In the middle part of rifle body head 23, there is internal thread 11, there is corresponding externally threaded nozzle and be tightened against securely rifle body head via this internal thread.

Fig. 4 shows the cutaway view dissecing along the line A-A of Fig. 3 by plane injection channel 12a, 12b and circular injection channel 13a, 13b.Can find out, each in two passages comprises two parts, i.e. rear channels part 12a, 13a and front channels part 12b, 13b.Normally, rear channels part 12a can have identical diameter with rear channels part 13a, and the diameter of front channels part 12b is different from the diameter of front channels part 13b. Front channels part 12b, 13b in the past side are drilled in spray gun body.Front channels part must have very little diameter, for example, between 1.6mm and 2.3mm, this be because, as appreciable in Fig. 3, very limited for the space of holing.Yet in order to have the air of q.s, near channel part air distributor must have larger diameter.This makes to drill through from the rear portion of spray gun rear channels part 12a, 13a.Rear side at spray gun body has enough borehole space.Yet a drawback of this solution is, must seal the boring on the rear side that is formed on spray gun body, this is that spray gun cannot normally be worked because when air leaves spray gun by the boring at rear portion.According to the prior art shown in Fig. 4, these borings seal by ball plug or other embolisms 12c, 13c.Therefore, because the front channels part of air duct must be drilled in rifle body head, so spray gun must be overturn when drilling through rear channels part, and because the rear channels part of air duct must be drilled in the rear portion of spray gun body, so must be by the borehole sealing in rear portion.These steps cause producing much boring and assembly work and therefore need to spend plenty of time and cost.In addition, can form dead space 12d, 13d.Because dead space is not the direction along air-flow, so dust can accumulate in this, thereby can affect the function of air distributor and the function of whole spray gun.

In addition,, if the air capacity that different spray gun needs is different from pressure, so just must change the internal diameter of air duct.According to prior art, by piercing the different boring of spray gun body, make a change.This means, if expect a certain special air amount and pressure, just need in spray gun body, drill through the boring with a special diameter or a plurality of special diameters.If expect another air capacity and pressure, just need in spray gun body, drill through and there is another different special diameters or the hole of a plurality of special diameters.Therefore,, once spray gun is out manufactured, it just cannot be suitable for different air capacities and pressure.Spray gun manufacturer need to be for different air capacities the different boring workbench from pressure.This is consuming time and expensive and the have to quantity of the clear spray gun of certain type that must produce of manufacturer.

For this reason, can consider the choke valve with the internal diameter less than air duct to be inserted in air duct.This provides the possibility that manufacturer drills through the air duct with constant diameter or a plurality of constant diameters in spray gun body and air capacity and the pressure producing by changing spray gun during choke valve is inserted into air duct.

Yet, if the diameter of air duct self less (for example, because the overall dimensions proportion requirement of spray gun is more and more less), be difficult to insert choke valve, because choke valve must have certain wall thickness and this may cause the internal diameter of choke valve to become too little, thereby they cannot transmit enough air.In other situations, when expecting certain internal diameter, due to the certain air capacity of expectation and pressure, therefore when air duct is only greater than the expectation internal diameter of choke valve slightly, the wall of choke valve must be very thin.The choke valve with thin-walled easily damages in being inserted into air duct time, or may at least produce less desirable distortion and affect air-flow and therefore affect the function of spray gun.

Utility model content

For solving the aforementioned problems in the prior, propose the utility model, and the purpose of this utility model is to provide a kind of spray gun, it can more easily be manufactured, and can not exert an influence to the functional of spray gun.

Preferred embodiment of the present utility model provides a kind of spray gun, described spray gun comprises spray gun body, described spray gun body comprise rifle body head for engagement nozzle, with the upper gun body of described rifle body head adjacent and the handle that attaches to described upper gun body, wherein, at least one horizontal air passage is formed in described spray gun body, and described at least one horizontal air passage originates in the end of described rifle body head and ends at the inside of described upper gun body.

Further, described at least one horizontal air passage ends at the part place engaging with air distributor of described upper gun body inside, and described at least one horizontal air passage is communicated with the longitudinal air duct gas that extends through described handle via described air distributor.

Further, described at least one horizontal air passage comprises that the central axis with respect to described rifle body head is arranged on Different Diameter at least one first horizontal air passage and at least one second horizontal air passage of position.

Further, described the first horizontal air passage has and is arranged in the first front channels part of described rifle body head and is communicated with described the first front channels portion gas and away from the first rear channels part of described rifle body head, the internal diameter of described the first front channels part is greater than described the first rear channels internal diameter partly.

Further, described the second horizontal air passage has and is arranged in the second front channels part of described rifle body head and is communicated with described the second front channels portion gas and away from the second rear channels part of described rifle body head, the internal diameter of described the second front channels part is greater than described the second rear channels internal diameter partly.

Further, in described the first front channels part, be furnished with first throttle valve, and be furnished with the second choke valve in described the second front channels part.

Further, described the first front channels part is identical with the internal diameter of described the second front channels part.

Further, described first throttle valve and described the second choke valve have mutually the same external diameter and the internal diameter differing from one another.

Further, described the first rear channels part is identical with the internal diameter of described the second rear channels part.

Further, the ratio of the external diameter of the width of described upper gun body and described rifle body head is between 0.48 and 0.65.Preferably, the width of described upper gun body is 0.53 with the ratio of the external diameter of described rifle body head.

Further, the ratio between the ratio between the internal diameter of described the first rear channels part and the internal diameter of described the first front channels part or the internal diameter of described the second rear channels part and the internal diameter of described the second front channels part is between 0.7 and 0.85.Preferably, the ratio between the ratio between the internal diameter of described the first rear channels part and the internal diameter of described the first front channels part or the internal diameter of described the second rear channels part and the internal diameter of described the second front channels part is 0.76.

Further, described the first front channels part is coaxial with described the first rear channels part.

Further, described the second front channels part is coaxial with described the second rear channels part.

Further, described the first horizontal air passage and described the second horizontal air passage are parallel to each other.

Than prior art, according to spray gun of the present utility model, at least can realize following useful technique effect:

Can from the rifle body head of spray gun directly boring form horizontal air passage, and without the rear portion boring from upper gun body, avoid forming dead space and reduced time, easy and simple to handle of drilling operating;

Horizontal air passage can have the larger channel part of internal diameter that is arranged in rifle body head, be convenient to install choke valve and avoid choke valve to damage, and each horizontal air passage can form measure-alike each other, thereby reduced the quantity of boring workbench.

Accompanying drawing explanation

Accompanying drawing forms the part of this description, for helping further to understand the utility model.Accompanying drawing shows preferred embodiment of the present utility model and be used for illustrating principle of the present utility model together with description.In accompanying drawing:

Fig. 1 shows the cutaway view of the gravity type spray gun of prior art;

Fig. 2 shows the plan view of the spray gun body of spray gun shown in Fig. 1;

Fig. 3 shows the front view of the spray gun body of spray gun shown in Fig. 1;

Fig. 4 shows the cutaway view dissecing along the line A-A in Fig. 3;

Fig. 5 shows according to the plan view of the spray gun body of the spray gun of the utility model preferred embodiment;

Fig. 6 shows the front view of the body of spray gun shown in Fig. 5;

Fig. 7 shows the cutaway view dissecing along the line B-B in Fig. 6; And

Fig. 8 shows the partial view of the rifle body head of the body of spray gun shown in Fig. 7, wherein shows additional choke valve.

The specific embodiment

Hereinafter with reference to the accompanying drawing that shows the utility model preferred embodiment, the utility model is described more fully.But the utility model can, with multiple multi-form enforcement, not constructed and should not only limit to preferred embodiment set forth herein.Certainly, it is in order to make the disclosure more comprehensively with complete that preferred embodiment is provided, and can fully pass on scope of the present utility model to those skilled in the art.

Fig. 5 to Fig. 8 shows the spray gun body according to the spray gun of the utility model preferred embodiment.

Fig. 5 shows according to the plan view of the spray gun body of the spray gun of the utility model preferred embodiment.Spray gun comprises spray gun body 2a, spray gun body has the rifle body head 23a for engagement nozzle, the upper gun body 22a adjacent with rifle body head 23a and the handle 21a that is engaged to upper gun body 22a, and wherein rifle body head 23a has the external screw thread that is preferably trapezoidal thread.In spray gun body, be provided with air distributor 8a, air distributor 8a distributes for the gas of convection current in longitudinal air duct (not shown) of handle 21a.

Fig. 6 shows the front view of spray gun shown in Fig. 5, wherein the clear front that shows rifle body head 23a.Fig. 7 shows along the cutaway view of the cutting line B-B intercepting in Fig. 6.According to the spray gun of the utility model preferred embodiment, comprise the horizontal air passage being formed in upper gun body 22a, the first horizontal air passage 14 and the second horizontal air passage 15 have been shown in this embodiment, the two can be parallel to each other so that drilling operation.Referring to Fig. 7, the first horizontal air passage 14 and the second horizontal air passage 15 originate in the end of rifle body head 23a and end at the part place engaging with air distributor 8a in gun body 22a inside, and the first horizontal air passage 14 and the second horizontal air passage 15 are communicated with longitudinal air duct gas via air distributor 8a thus.As shown in Figure 6, the first horizontal air passage 14 and the second horizontal air passage 15 are arranged on Different Diameter to position with respect to the central axis of rifle body head 23a, and for example the first horizontal air passage 14 is that plane injection channel and the second horizontal air passage 15 are circular injection channel.

Can find out, compare with the spray gun of prior art, according in the spray gun of the utility model preferred embodiment, rifle body head 23a is obviously larger with respect to the upper gun body 22a size being located immediately at after rifle body head 23a of spray gun body.Thereby as shown in Figure 6, the first air duct 14 and the second air duct 15 can form greatlyr than the respective air passage of the prior art spray gun body shown in Fig. 3.

That is to say, according in the spray gun of the utility model preferred embodiment, the width W of upper gun body 22a and the ratio of the outer diameter D of rifle body head 23a are less than the width W 1 of upper gun body and the ratio of the outer diameter D 1 of rifle body head of prior art spray gun.Preferably, for example, in the Comparative Example of prior art, the width W 1 that the outer diameter D 1 of rifle body head 23 is about 26mm and upper gun body is about 16mm.On in this preferred embodiment of the present utility model, the width of gun body 22a is about between 14mm and 18mm, and the external diameter of rifle body head 23a can be between 28mm and 34mm, and the external diameter that preferably, the width of upper gun body 22a is about 16mm and rifle body head 23a is about 30mm.For according to the spray gun of the utility model preferred embodiment, the ratio on spray gun between the width W of gun body and rifle body head outer diameter D, between 0.48 to 0.65, and is preferably 0.53.By this ratio, can in upper gun body 22a, drill through the air duct of enough large diameters.

According in the spray gun of the utility model preferred embodiment, rifle body head is enough large, directly to drill through enough large holes for transmitting q.s air from rifle body head side as air duct, and without the rear side boring from upper gun body.As can be seen from Figure 7, after air distributor 8a, there is no dead space, this is the not further upwards rear portion of gun body extension because the first horizontal air passage 14 and the second horizontal air passage 15 only arrive air distributor 8a.In the spray gun of the utility model preferred embodiment, because air enters longitudinal air duct (not shown) and flows through whole horizontal air passage 14 or 15 via air distributor 8 from the air connector (not shown) of handle bottom, thereby can not form dead space and therefore not have dust or dirt to accumulate in wherein.

Further, as shown in Figure 7, according in preferred embodiment of the present utility model, the first horizontal air passage 14 can comprise the first anterior air duct part 14b being formed in rifle body head 23a and be communicated with the first anterior air duct part 14b and away from the first rear portion air duct part 14a of rifle body head 23a, the internal diameter of the first anterior air duct part 14b is greater than the first rear portion air duct part 14a; And the second horizontal air passage 15 can comprise the second anterior air duct part 15b being formed in rifle body head 23a and be communicated with the second anterior air duct part 15b and away from the first rear portion air duct part 15a of rifle body head 23a, the internal diameter of the second anterior air duct part 15b is greater than the second rear portion air duct part 15a.

As shown in Figure 8, in the first anterior air duct part 14b that internal diameter is larger and the second anterior air duct part 15b, can be furnished with respectively choke valve 16a and choke valve 16b.Wherein, the first anterior air duct part 14b and the second anterior air duct part 15b can form has identical internal diameter, and choke valve 16a and choke valve 16b can form and have identical external diameter and have different internal diameters, make to realize different air mass flows and pressure.That is to say, according in the spray gun of the utility model preferred embodiment, can utilize identical boring work bench drill to get a plurality of air ducts, and by thering is the choke valve of different inner diameters, realize the adjusting of air mass flow and pressure, so that applicable different occasion.And, can be mutually the same due to choke valve external diameter and only there is different internal diameters, thereby also simplified the manufacture of choke valve.

In the Comparative Example of prior art as shown in Figure 4, the first air duct rear portion 12a and the second air duct rear portion 13a can all have the internal diameter of 3.8mm and the internal diameter of the first air duct front part 12b and the second air duct front part 13b is respectively 2.1mm and 1.8mm, and rear portion is separately greater than respectively front part and ratio is about respectively 1.8 and 2.1.And according in preferred embodiment of the present utility model, the first air duct rear portion 14a and the second air duct rear portion 15a can all have the internal diameter that the internal diameter of 3.8mm and the first air duct front part 14b and the second air duct front part 15b can all have 5mm, and rear portion is separately about 0.76 with the ratio of the internal diameter of front part.That is to say, in spray gun of the present utility model, the internal diameter that is formed on the air duct part in rifle body head can be relatively large, thereby can in this air duct part, suitably insert choke valve, damage and the less desirable distortion of choke valve have been avoided, guarantee to adjust exactly air capacity and pressure, guarantee the normal operating performance of spray gun.

Preferably, the first front channels part 14b is coaxial and/or the second front channels part 15b is coaxial with the second rear channels part 15a with the first rear channels part 14a, thereby can further simplify bore process.Alternatively, these passages can concentric manner location.

These are only preferred embodiment of the present utility model, be not limited to the utility model.For a person skilled in the art, the utility model can have various modifications and variations.All any modifications of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model within spirit of the present utility model and principle.

Claims (16)

1. a spray gun, described spray gun comprises spray gun body, described spray gun body comprise rifle body head for engagement nozzle, with the upper gun body of described rifle body head adjacent and the handle that attaches to described upper gun body, it is characterized in that, at least one horizontal air passage is formed in described spray gun body, and described at least one horizontal air passage originates in the end of described rifle body head and ends at the inside of described upper gun body.

2. spray gun according to claim 1, it is characterized in that, described at least one horizontal air passage ends at the part place engaging with air distributor of described upper gun body inside, and described at least one horizontal air passage is communicated with the longitudinal air duct gas that extends through described handle via described air distributor.

3. spray gun according to claim 1, it is characterized in that, described at least one horizontal air passage comprises that the central axis with respect to described rifle body head is arranged on Different Diameter at least one first horizontal air passage and at least one second horizontal air passage of position.

4. spray gun according to claim 3, it is characterized in that, described the first horizontal air passage has and is arranged in the first front channels part of described rifle body head and is communicated with described the first front channels portion gas and away from the first rear channels part of described rifle body head, the internal diameter of described the first front channels part is greater than described the first rear channels internal diameter partly.

5. spray gun according to claim 4, it is characterized in that, described the second horizontal air passage has and is arranged in the second front channels part of described rifle body head and is communicated with described the second front channels portion gas and away from the second rear channels part of described rifle body head, the internal diameter of described the second front channels part is greater than described the second rear channels internal diameter partly.

6. spray gun according to claim 5, is characterized in that, in described the first front channels part, is furnished with first throttle valve, and is furnished with the second choke valve in described the second front channels part.

7. spray gun according to claim 6, is characterized in that, described the first front channels part is identical with the internal diameter of described the second front channels part.

8. spray gun according to claim 7, is characterized in that, described first throttle valve and described the second choke valve have mutually the same external diameter and the internal diameter differing from one another.

9. according to the spray gun described in claim 7 or 8, it is characterized in that, described the first rear channels part is identical with the internal diameter of described the second rear channels part.

10. according to the spray gun described in any one in claim 1 to 5, it is characterized in that, the ratio of the external diameter of the width of described upper gun body and described rifle body head is between 0.48 and 0.65.

11. spray guns according to claim 10, is characterized in that, the width of described upper gun body is 0.53 with the ratio of the external diameter of described rifle body head.

12. spray guns according to claim 9, it is characterized in that, the ratio between the ratio between the internal diameter of described the first rear channels part and the internal diameter of described the first front channels part or the internal diameter of described the second rear channels part and the internal diameter of described the second front channels part is between 0.7 and 0.85.

13. spray guns according to claim 12, it is characterized in that, the ratio between the ratio between the internal diameter of described the first rear channels part and the internal diameter of described the first front channels part or the internal diameter of described the second rear channels part and the internal diameter of described the second front channels part is 0.76.

14. spray guns according to claim 4, is characterized in that, described the first front channels part is coaxial with described the first rear channels part.

15. according to the spray gun described in claim 5 or 14, it is characterized in that, described the second front channels part is coaxial with described the second rear channels part.

16. spray guns according to claim 3, is characterized in that, described the first horizontal air passage and described the second horizontal air passage are parallel to each other.

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