CN210700700U - Spray gun structure - Google Patents

Abstract

The utility model discloses a spray gun structure, which comprises a gun body, a liquid amount adjusting part, a liquid spray starting and stopping part, a partition part, a liquid spray amplitude adjusting part, a liquid spray atomizing part and a spray gun fixing part, wherein the liquid amount adjusting part, the liquid spray starting and stopping part and the spray gun fixing part are arranged at the gun body; the liquid spray starting and stopping part and the partition part are arranged between the liquid spray atomizing part and the liquid amount adjusting part, and the liquid spray starting and stopping part is arranged between the liquid amount adjusting part and the partition part. The utility model discloses a cut off part modern design, design are ingenious, and when the sharp pyramis of second guide pin bushing appeared wearing and tearing under long-term the use, middle spring can impel the second guide pin bushing, makes it continue to plug up the gap between needle of a gun and the rifle body tightly, realizes automatic compensation.

Description

Spray gun structure

Technical Field

The utility model relates to a spray gun technical field, in particular to spray gun structure.

Background

The spray gun is a spraying device which atomizes liquid and further sprays objects to be coated to obtain uniform and attractive coating layers. When the spray gun is used, the width (namely the spraying area) of the spraying surface can be changed according to the requirement of a user so as to meet the actual requirement of production. Under the long-term use, the internal important parts of the spray gun are inevitably worn, and the existing spray gun is lack of an automatic compensation mechanism for the important parts; in addition, the existing spray gun cannot effectively monitor the conditions of the internal parts, and when the internal important parts are damaged, which important parts are damaged cannot be accurately known.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a spray gun structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a spray gun structure comprises a gun body, a liquid amount adjusting part, a liquid spraying start-stop part, a partition part, a spraying amplitude adjusting part, a liquid spraying atomization part and a spray gun fixing part, wherein the liquid amount adjusting part, the liquid spraying start-stop part, the partition part, the spraying amplitude adjusting part, the liquid spraying atomization part and the spray gun fixing part are arranged at the gun body; the spray liquid starting and stopping part and the partition part are both arranged between the spray liquid atomizing part and the liquid amount adjusting part, and the spray liquid starting and stopping part is arranged between the liquid amount adjusting part and the partition part;

the spray starting and stopping part comprises a gun needle and a cylinder piston, a gun nozzle is installed at the gun body, the needle point of the gun needle is blocked on the gun nozzle, the gun needle sequentially penetrates through the cylinder piston and the partition part, a spray injection hole is formed at the gun body, and spray flows into the gun body through the spray injection hole; a spray liquid start-stop air inlet hole is formed in one side of the gun body and is communicated with a first air source, the first air source inflates the gun body through the spray liquid start-stop air inlet hole, the inflated air pushes the cylinder piston, the cylinder piston drives the gun needle to retreat, and the gun needle removes the blockage of the gun nozzle, so that spray liquid in the spray gun can pass through the gun nozzle of the spray gun;

the other side of the gun body is provided with a spray liquid atomization air inlet hole which is communicated with a second air source, the second air source inflates the gun body through the spray liquid atomization air inlet hole, and the inflated air flows to the spray liquid atomization part through the gun body so as to atomize spray liquid passing through a gun nozzle;

the partition part comprises a gas isolation sleeve, a first guide sleeve, a middle spring and a second guide sleeve, the gun needle sequentially penetrates through the gas isolation sleeve, the first guide sleeve, the middle spring and the second guide sleeve, the cylinder piston is inserted at one end of the gas isolation sleeve in a sliding manner, a concave cavity is formed in the other end of the gas isolation sleeve, the first guide sleeve, the middle spring and the second guide sleeve are all arranged in the concave cavity, and the middle spring is arranged between the first guide sleeve and the second guide sleeve;

the gas isolation sleeve is provided with a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are used for preventing gas at the spray liquid atomization air inlet from mutually communicating with gas at the spray liquid start-stop air inlet, the first sealing ring is arranged between the gas isolation sleeve and the cylinder piston, and the second sealing ring is arranged between the gas isolation sleeve and the gun body; the first guide sleeve is used for guiding the gun needle and also used for plugging the gas filled into the spray liquid atomization gas inlet hole, so that the gas filled into the spray liquid atomization gas inlet hole cannot leak out at the first guide sleeve; the second guide sleeve is used for guiding the gun needle and blocking the liquid spray, so that the liquid spray in the spray gun can only flow towards the gun nozzle.

Further elaborating, the liquid spraying start-stop part also comprises a first return spring and a second return spring, wherein one end of the first return spring is abutted against the cylinder piston, and the other end of the first return spring is abutted against the liquid quantity adjusting part; one end of the second reset spring is abutted against the gun needle, and the other end of the second reset spring is abutted against the rear seat of the gun body.

Further elaborating, liquid measure adjusting part is including liquid measure adjust knob, liquid measure adjusting intermediate member, liquid measure adjust knob with the back seat of the rifle body passes through threaded connection, liquid measure adjusting intermediate member fixed mounting in liquid measure adjust knob, liquid measure adjusting intermediate member is located liquid measure adjust knob with between the rifle needle.

Further elaborating, liquid measure adjustment part is including the back lock nut, the back lock nut is located liquid measure adjust knob's screw thread port department, the back lock nut with the back seat of the rifle body passes through threaded connection.

Further elaborating, the rifle body is opened has the spray amplitude and adjusts the chamber, the inner chamber department of rifle body has first dark way, second dark way, first dark way intercommunication the inner chamber of rifle body with spray amplitude adjusts the chamber, the second dark way intercommunication spray amplitude adjust the chamber to rifle mouth department, spray amplitude adjust the chamber with it has the spray amplitude regulation hole to open between the rifle mouth.

Further elaborating, the spray width adjusting part comprises a spray width adjusting rod, a third guide sleeve and a guide sleeve pressing piece, wherein an inner thread is arranged at the cavity opening of the spray width adjusting cavity, the guide sleeve pressing piece is in threaded connection with the cavity opening of the spray width adjusting cavity, the third guide sleeve is pressed by the guide sleeve pressing piece to the spray width adjusting cavity, the spray width adjusting rod is installed on the guide sleeve pressing piece, the outer thread of the spray width adjusting rod is matched with the inner thread of the guide sleeve pressing piece, and the rod tip of the spray width adjusting rod is pressed against the spray width adjusting hole; the third guide sleeve is used for guiding the spray width adjusting rod and blocking the gas filled into the spray liquid atomization air inlet hole, so that the gas cannot leak out of the orifice of the spray width adjusting cavity.

Further elaborating, the spray atomizing part comprises an atomizing cap which is fixedly arranged on a front seat of the gun body, a main atomizing hole is formed in the middle of the atomizing cap, two symmetrical atomizing chutes are arranged around the main atomizing hole, and amplitude side holes are formed in the upper side and the lower side of the atomizing cap; the muzzle of the muzzle protrudes out of the main atomization hole.

Further elaborating, the rifle body department has still seted up gas-liquid and has cut off the monitoring hole, gas-liquid cuts off the monitoring hole set up in between first guide pin bushing and the second guide pin bushing.

Further elaborating, the spray gun fixing part comprises a locking screw, the gun body is provided with a mounting hole, and the locking screw is arranged at the mounting hole.

The beneficial effects of the utility model reside in that:

the partition part adopted by the utility model has novel design and ingenious conception, when the sharp cone part of the second guide sleeve is worn after long-term use, the middle spring can push the second guide sleeve to enable the second guide sleeve to continuously and tightly block the gap between the gun needle and the gun body, thereby realizing automatic compensation;

secondly, the gas-liquid separation monitoring hole is arranged at the gun body, so that the conditions of the first guide sleeve and the second guide sleeve in the spray gun can be effectively monitored only through the gas-liquid separation monitoring hole, the design is simple, and the effect is obvious;

thirdly, the utility model is provided with a spray liquid start-stop air inlet and a spray liquid atomization air inlet on two sides of the gun body respectively, and under the matching of the spray liquid start-stop part and the partition part, the gas filled into the spray liquid start-stop air inlet and the gas filled into the spray liquid atomization air inlet are not influenced mutually;

the liquid amount sprayed from the gun nozzle can be adjusted steplessly by the liquid amount adjusting knob, so that the liquid amount can be accurately controlled;

the utility model adopts the atomizing cap with special structure, which can realize the atomizing of the spray liquid and present the effect of fan-shaped spray amplitude;

sixth, the utility model discloses the gas flow of spraying width of cloth regulation hole department is adjusted to the accessible spraying width of cloth regulation pole to reach the effect of the size of control fan-shaped spraying width of cloth.

Drawings

Fig. 1 is a left side view of the present invention.

Fig. 2 is a left cross-sectional view of the utility model in the "gun-closing" state.

Fig. 3 is a left cross-sectional view of the present invention in the "gun on" state.

Fig. 4 is a right side view of the present invention.

Fig. 5 is a right sectional view of the present invention in the "gun on" state.

Fig. 6 is a cross-sectional view of the gun body.

Reference numerals:

10. a gun body; 101. injecting a spray liquid; 102. a spray start-stop air inlet; 103. a spray atomization inlet; 104. a spray amplitude adjusting cavity; 105. a first dark channel; 106. a second hidden channel; 107. a spray width adjusting hole; 108. gas-liquid separation monitoring holes; 109. mounting holes; 11. a gun nozzle; 111. a muzzle; 12. a rear seat; 13. a front seat;

20. a liquid amount adjusting section; 21. a liquid amount adjusting knob; 22. liquid amount adjusting intermediate member; 23. reversely locking the nut;

30. a liquid spraying start-stop part; 31. a gun needle; 311. a needle tip; 32. a cylinder piston; 33. a first return spring; 34. a second return spring;

40. a partition portion; 41. a gas isolation sleeve; 411. a first seal ring; 412. a second seal ring; 42. a first guide sleeve; 43. a middle spring; 44. a second guide sleeve;

50. a spray width adjusting part; 51. a spray width adjusting rod; 52. a third guide sleeve; 53. a guide sleeve pressing piece;

60. a spray atomizing part; 61. an atomizing cap; 611. a primary atomization orifice; 612. an atomizing chute; 613. side holes of the spraying frame;

70. a spray gun fixing part; 71. and locking the screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 6, a spray gun structure includes a gun body 10, and a liquid amount adjusting part 20, a spray start/stop part 30, a partition part 40, a spray width adjusting part 50, a spray atomizing part 60, and a spray gun fixing part 70 which are disposed at the gun body 10, wherein the spray width adjusting part 50 and the spray gun fixing part 70 are respectively disposed at upper and lower ends of the gun body 10, the spray atomizing part 60 and the liquid amount adjusting part 20 are respectively disposed at front and rear ends of the gun body 10, and the spray start/stop part 30 and the partition part 40 are both disposed in an inner cavity of the gun body 10; the spray start-stop portion 30 and the partition portion 40 are both provided between the spray atomizing portion 60 and the liquid amount adjusting portion 20, and the spray start-stop portion 30 is provided between the liquid amount adjusting portion 20 and the partition portion 40;

referring to fig. 2, fig. 3 and fig. 5, the spray start/stop portion 30 includes a gun needle 31 and a cylinder piston 32, a gun nozzle 11 is installed at the gun body 10, a needle tip 311 of the gun needle 31 blocks the gun nozzle 11, and the gun needle 31 sequentially penetrates through the cylinder piston 32 and the partition portion 40; referring to fig. 2 and 3, a spray injection hole 101 is formed in the gun body 10, as shown in fig. 3, spray flows into the gun body 10 through the spray injection hole 101 (the spray injected into the gun body is indicated by a small gray arrow), a spray start/stop air inlet 102 is formed in one side of the gun body 10, the spray start/stop air inlet 102 is communicated with a first air source, the first air source inflates the gun body 10 through the spray start/stop air inlet 102, the cylinder piston 32 is pushed by the inflated air, the cylinder piston 32 drives the gun needle 31 to retreat, and the gun needle 31 removes the blockage of the gun nozzle 11, so that the spray in the spray gun can pass through the gun nozzle 11 of the spray gun;

referring to fig. 2 and fig. 3, a spray atomization air inlet 103 is disposed on the other side of the gun body 10, the spray atomization air inlet 103 is communicated with a second air source, the second air source inflates the gun body 10 through the spray atomization air inlet 103, and the inflated air flows to the spray atomization portion 60 through the gun body 10, so as to atomize the spray passing through the gun nozzle 11;

the partition part 40 comprises a gas isolation sleeve 41, a first guide sleeve 42, a middle spring 43 and a second guide sleeve 44, the gun needle 31 sequentially penetrates through the gas isolation sleeve 41, the first guide sleeve 42, the middle spring 43 and the second guide sleeve 44, the cylinder piston 32 is slidably inserted into one end of the gas isolation sleeve 41, a concave cavity is formed in the other end of the gas isolation sleeve 41, the first guide sleeve 42, the middle spring 43 and the second guide sleeve 44 are all arranged in the concave cavity, and the middle spring 43 is arranged between the first guide sleeve 42 and the second guide sleeve 44;

the gas isolation sleeve 41 is provided with a first sealing ring 411 and a second sealing ring 412, the first sealing ring 411 and the second sealing ring 412 are both used for preventing gas at the spray liquid atomization gas inlet 103 from communicating with gas at the spray liquid start-stop gas inlet 102, the first sealing ring 411 is arranged between the gas isolation sleeve 41 and the cylinder piston 32, and the second sealing ring 412 is arranged between the gas isolation sleeve 41 and the gun body 10; the first guide sleeve 42 is used for guiding the gun needle 31 and blocking the gas filled into the spray atomization gas inlet 103, so that the gas filled into the spray atomization gas inlet 103 cannot leak out at the first guide sleeve 42; the second guide sleeve 44 serves both for guiding the gun needle 31 and for blocking the spray, so that the spray in the spray gun can only flow toward the gun nozzle 11.

Referring to fig. 3, the spray start-stop portion 30 further includes a first return spring 33 and a second return spring 34, one end of the first return spring 33 abuts against the cylinder piston 32, and the other end of the first return spring 33 abuts against the liquid amount adjusting portion 20; one end of the second return spring 34 abuts against the gun needle 31, and the other end of the second return spring 34 abuts against the rear seat 12 of the gun body 10.

Referring to fig. 3, the liquid amount adjusting part 20 includes a liquid amount adjusting knob 21, and a liquid amount adjusting intermediate member 22, the liquid amount adjusting knob 21 is screwed to the rear seat 12 of the gun body 10, the liquid amount adjusting intermediate member 22 is fixedly mounted to the liquid amount adjusting knob 21, and the liquid amount adjusting intermediate member 22 is disposed between the liquid amount adjusting knob 21 and the gun needle 31. As shown in fig. 5, when the first air source inflates the gun body 10 through the liquid spray start/stop air inlet hole 102 (the filled gas is indicated by a black arrow), the filled gas pushes the cylinder piston 32, the first return spring 33 is pressed to elastically deform, the cylinder piston 32 drives the gun needle 31 to retreat to the liquid amount adjusting intermediate member 22, the second return spring 34 is pressed to elastically deform, and the liquid amount adjusting intermediate member 22 abuts against the tail end of the gun needle 31, so that the gun is started. At this time, the liquid amount adjusting knob 21 is screwed, the liquid amount adjusting knob 21 drives the liquid amount adjusting intermediate piece 22, and the liquid amount adjusting intermediate piece 22 drives the gun needle 31, so that the gap between the needle point 311 of the gun needle 31 and the gun nozzle 11 can be adjusted, and the liquid amount sprayed out of the gun nozzle 11 can be adjusted. When the gas is not filled into the liquid spray start-stop air inlet hole 102 any more, the first return spring 33 recovers elastic deformation, the first return spring 33 drives the cylinder piston 32 to move back to the original position, then the second return spring 34 recovers elastic deformation, the second return spring 34 drives the gun needle 31 to move back to the original position, and the needle point 311 of the gun needle 31 blocks the gun nozzle 11, so that the gun is closed. The needle tip 311 guides the muzzle 11 to seal. Since the liquid amount adjusting knob 21 is screwed to the rear seat 12 of the gun body 10, the liquid amount sprayed from the gun nozzle 11 can be adjusted steplessly by screwing the liquid amount adjusting knob 21. In addition, a flange for limiting is provided at the axial surface of the liquid amount adjusting intermediate member 22 to prevent the liquid amount ejected from the gun nozzle 11 from being excessively adjusted.

Referring to fig. 3, the liquid amount adjusting part 20 includes an anti-lock nut 23, the anti-lock nut 23 is disposed at a threaded port of the liquid amount adjusting knob 21, and the anti-lock nut 23 is threadedly connected to the rear seat 12 of the gun body 10. After the liquid amount sprayed from the gun nozzle 11 is adjusted by the liquid amount adjusting knob 21, the liquid amount adjusting knob 21 can be locked by reversely screwing the back locking nut 23, so that the liquid amount sprayed from the gun nozzle 11 is prevented from being affected by looseness of the liquid amount adjusting knob 21.

Referring to fig. 3 and 6, the gun body 10 is provided with a spray width adjusting cavity 104, the inner cavity of the gun body 10 is provided with a first hidden channel 105 and a second hidden channel 106, the first hidden channel 105 communicates the inner cavity of the gun body 10 and the spray width adjusting cavity 104, the second hidden channel 106 communicates the spray width adjusting cavity 104 to the gun nozzle 11, and a spray width adjusting hole 107 is provided between the spray width adjusting cavity 104 and the gun nozzle 11.

Referring to fig. 3, the nozzle-width adjusting part 50 includes a nozzle-width adjusting rod 51, a third guide sleeve 52, and a guide sleeve pressing member 53, wherein an inner thread is provided at a cavity opening of the nozzle-width adjusting cavity 104, the guide sleeve pressing member 53 is in threaded connection with the cavity opening of the nozzle-width adjusting cavity 104, the third guide sleeve 52 is pressed against the nozzle-width adjusting cavity 104 by the guide sleeve pressing member 53, the nozzle-width adjusting rod 51 is mounted on the guide sleeve pressing member 53, an outer thread of the nozzle-width adjusting rod 51 is matched with the inner thread of the guide sleeve pressing member 53, and a rod tip of the nozzle-width adjusting rod 51 abuts against the nozzle-width adjusting hole 107; the third guide sleeve 52 is used for guiding the spray width adjusting rod 51, and also for blocking the gas filled into the spray atomization gas inlet hole 103, so that the gas cannot leak out of the orifice of the spray width adjusting cavity 104. The third guide sleeve 52 is made of elastic nylon material, and the guide sleeve pressing piece 53 presses the third guide sleeve 52 to the spray width adjusting cavity 104, so that the effect of preventing gas from leaking to the cavity opening of the spray width adjusting cavity 104 can be achieved; in addition, since the jet width adjusting rod 51 passes through the third guide sleeve 52, the third guide sleeve 52 also plays a role in guiding the jet width adjusting rod 51, so that the rod tip of the jet width adjusting rod 51 can accurately support the jet width adjusting hole 107 without generating a leak. When the device is used, the spray width adjusting rod 51 can be screwed to adjust the plugging condition of the rod tip of the spray width adjusting rod 51 on the spray width adjusting hole 107, so that the effect of controlling the gas flow at the spray width adjusting hole 107 is achieved.

Referring to fig. 2 and fig. 3, the spray atomizing part 60 includes an atomizing cap 61, the atomizing cap 61 is fixedly mounted on the front seat 13 of the gun body 10, the front seat 13 is used for guiding and connecting the atomizing cap 61 with the gun nozzle 11, an O-ring made of teflon is disposed at the front seat 13, a main atomizing hole 611 is formed in the middle of the atomizing cap 61, two symmetric atomizing chutes 612 are disposed around the main atomizing hole 611, and both the upper and lower sides of the atomizing cap 61 are provided with a width-spraying side hole 613; the muzzle 111 of the muzzle 11 protrudes from the primary atomization hole 611. As shown in fig. 3, the second gas source charges gas into the gun body 10 through the spray atomization gas inlet hole 103 (note: the charged gas is indicated by a black large arrow), the charged gas firstly passes through the gas isolation sleeve 41, then passes through the first blind channel 105 and enters the spray amplitude adjusting cavity 104, the gas enters the spray amplitude adjusting cavity 104 and then is divided into two parts, and a part of the gas flows through the gun nozzle 11 through the second blind channel 106 and is respectively sprayed out from the main atomization hole 611 and the atomization chute 612 of the atomization cap 61; the other part of the gas flows into the width adjustment holes 613 of the atomizing cap 61 through the width adjustment holes 107 and is ejected from the width adjustment holes 613 of the atomizing cap 61. The gas sprayed from the main atomization hole 611 breaks the liquid spray at the muzzle 111 of the muzzle 11 into small liquid particles, and the gas sprayed from the atomization chute 612 further breaks the small liquid particles into smaller particles, i.e. the liquid spray is atomized; on the other hand, the gas ejected from the main atomizing hole 611 can also blow the atomized liquid spray toward the workpiece to be sprayed. The gas ejected from the swath side holes 613 drives the atomized spray liquid to exhibit the fan-shaped swath effect. When in use, the air flow at the spraying-amplitude adjusting holes 107 can be adjusted by adjusting the spraying-amplitude adjusting rod 51 so as to control the size of the fan-shaped spraying amplitude.

Referring to fig. 2, a gas-liquid separation monitoring hole 108 is further formed in the gun body 10, and the gas-liquid separation monitoring hole 108 is disposed between the first guide sleeve 42 and the second guide sleeve 44. Referring to fig. 2 and 3, the first guide sleeve 42 is fixedly installed in the cavity of the gas isolation sleeve 41, the middle spring 43 is disposed between the first guide sleeve 42 and the second guide sleeve 44, one end of the middle spring 43 abuts against the first guide sleeve 42, the other end of the middle spring 43 abuts against the second guide sleeve 44, and the second guide sleeve 44 tightly blocks the gap between the gun needle 31 and the gun body 10 under the action of the middle spring 43, so that the spray liquid in the spray gun can only circulate to the gun nozzle 11. When the taper of the second guide sleeve 44 is worn in long-term use, the middle spring 43 will push the second guide sleeve 44 to continuously and tightly block the gap between the gun needle 31 and the gun body 10, so as to realize automatic compensation. The gas-liquid separation monitoring hole 108 can play a role in monitoring whether the second guide sleeve 44 is completely damaged. When the second guide sleeve 44 is completely damaged, the spray can pass through the gap between the gun needle 31 and the gun body 10 and flow out of the gun body 10 through the gas-liquid separation monitoring hole 108, and at this time, the second guide sleeve 44 needs to be replaced. In addition, the gas-liquid separation monitoring hole 108 can also play a role in monitoring whether the first guide sleeve 42 is damaged or not. Because the second guide sleeve 44 is used for blocking the gas filled in the spray atomization gas inlet hole 103, the gas filled in the spray atomization gas inlet hole 103 can only circulate to the first blind channel 105. When the second guide sleeve 44 is damaged, the gas filled into the liquid spray atomization gas inlet 103 can pass through the second guide sleeve 44 and leak out of the gun body 10 through the gas-liquid separation monitoring hole 108, and at this time, the first guide sleeve 42 needs to be replaced. The second guide sleeve 44 is also made of an elastic teflon material.

In addition, the gun needle 31 sequentially passes through the first guide sleeve 42 and the second guide sleeve 44, and the first guide sleeve 42 and the second guide sleeve 44 both play a role in guiding the gun needle 31, so that the needle point 311 of the gun needle 31 can accurately prop against the muzzle 111 of the muzzle 11 without leaks.

Referring to fig. 1 and 4, the spray gun fixing part 70 includes a locking screw 71, the gun body 10 is provided with a mounting hole 109, and the locking screw 71 is disposed at the mounting hole 109. When in use, the spray gun can be fixedly arranged on the columnar body through the mounting hole 109, and the spray gun can be locked on the columnar body through the locking screw 71.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

The above is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications to the above embodiments are all within the scope of the technical solution of the present invention.

Claims (9)

1. A spray gun structure characterized by: the spray gun comprises a gun body (10), and a liquid amount adjusting part (20), a spray start-stop part (30), a partition part (40), a spray amplitude adjusting part (50), a spray atomization part (60) and a spray gun fixing part (70) which are arranged at the gun body (10), wherein the spray amplitude adjusting part (50) and the spray gun fixing part (70) are respectively arranged at the upper end and the lower end of the gun body (10), the spray atomization part (60) and the liquid amount adjusting part (20) are respectively arranged at the front end and the rear end of the gun body (10), and the spray start-stop part (30) and the partition part (40) are both arranged in an inner cavity of the gun body (10); the spray liquid starting and stopping part (30) and the partition part (40) are arranged between the spray liquid atomizing part (60) and the liquid amount adjusting part (20), and the spray liquid starting and stopping part (30) is arranged between the liquid amount adjusting part (20) and the partition part (40);

the spray starting and stopping part (30) comprises a gun needle (31) and a cylinder piston (32), a gun nozzle (11) is installed at the gun body (10), a needle point (311) of the gun needle (31) plugs the gun nozzle (11), the gun needle (31) sequentially penetrates through the cylinder piston (32) and the partition part (40), a spray injection hole (101) is formed at the gun body (10), and spray flows into the gun body (10) through the spray injection hole (101); a spray liquid start and stop air inlet hole (102) is formed in one side of the gun body (10), the spray liquid start and stop air inlet hole (102) is communicated with a first air source, the first air source inflates the gun body (10) through the spray liquid start and stop air inlet hole (102), the inflated air pushes the air cylinder piston (32), the air cylinder piston (32) drives the gun needle (31) to retreat, the gun needle (31) is removed from the gun nozzle (11), and therefore spray liquid in the spray gun can pass through the gun nozzle (11) of the spray gun;

a spray atomization air inlet hole (103) is formed in the other side of the gun body (10), the spray atomization air inlet hole (103) is communicated with a second air source, the second air source inflates the gun body (10) through the spray atomization air inlet hole (103), and the inflated air flows to the spray atomization part (60) through the gun body (10), so that spray passing through a gun nozzle (11) is atomized;

the partition part (40) comprises a gas isolation sleeve (41), a first guide sleeve (42), a middle spring (43) and a second guide sleeve (44), the gun needle (31) sequentially penetrates through the gas isolation sleeve (41), the first guide sleeve (42), the middle spring (43) and the second guide sleeve (44), the cylinder piston (32) is inserted into one end of the gas isolation sleeve (41) in a sliding mode, a concave cavity is formed in the other end of the gas isolation sleeve (41), the first guide sleeve (42), the middle spring (43) and the second guide sleeve (44) are all arranged in the concave cavity, and the middle spring (43) is arranged between the first guide sleeve (42) and the second guide sleeve (44);

the gas isolating sleeve (41) is provided with a first sealing ring (411) and a second sealing ring (412), the first sealing ring (411) and the second sealing ring (412) are used for preventing gas at the position of the spray liquid atomization gas inlet hole (103) and gas at the position of the spray liquid start-stop gas inlet hole (102) from mutually communicating, the first sealing ring (411) is arranged between the gas isolating sleeve (41) and the cylinder piston (32), and the second sealing ring (412) is arranged between the gas isolating sleeve (41) and the gun body (10); the first guide sleeve (42) is used for guiding the gun needle (31) and blocking gas filled into the spray liquid atomization gas inlet hole (103), so that the gas filled into the spray liquid atomization gas inlet hole (103) cannot leak out at the first guide sleeve (42); the second guide sleeve (44) is used for guiding the gun needle (31) and blocking the spray liquid, so that the spray liquid in the spray gun can only flow towards the gun nozzle (11).

2. A lance construction in accordance with claim 1, wherein: the liquid spraying start-stop part (30) further comprises a first return spring (33) and a second return spring (34), one end of the first return spring (33) is abutted against the cylinder piston (32), and the other end of the first return spring (33) is abutted against the liquid amount adjusting part (20); one end of the second return spring (34) is abutted against the gun needle (31), and the other end of the second return spring (34) is abutted against the rear seat (12) of the gun body (10).

3. A lance construction in accordance with claim 2, wherein: the liquid quantity adjusting part (20) comprises a liquid quantity adjusting knob (21) and a liquid quantity adjusting intermediate piece (22), the liquid quantity adjusting knob (21) is connected with a rear seat (12) of the gun body (10) through threads, the liquid quantity adjusting intermediate piece (22) is fixedly installed on the liquid quantity adjusting knob (21), and the liquid quantity adjusting intermediate piece (22) is arranged between the liquid quantity adjusting knob (21) and the gun needle (31).

4. A lance construction in accordance with claim 3, wherein: the liquid quantity adjusting part (20) comprises an anti-locking nut (23), the anti-locking nut (23) is arranged at a thread port of the liquid quantity adjusting knob (21), and the anti-locking nut (23) is connected with a rear seat (12) of the gun body (10) through threads.

5. A lance construction in accordance with claim 1, wherein: the gun body (10) is provided with a spray width adjusting cavity (104), the inner cavity of the gun body (10) is provided with a first hidden channel (105) and a second hidden channel (106), the first hidden channel (105) is communicated with the inner cavity of the gun body (10) and the spray width adjusting cavity (104), the second hidden channel (106) is communicated with the spray width adjusting cavity (104) to the gun nozzle (11), and a spray width adjusting hole (107) is formed between the spray width adjusting cavity (104) and the gun nozzle (11).

6. A lance construction in accordance with claim 5, wherein: the spray width adjusting part (50) comprises a spray width adjusting rod (51), a third guide sleeve (52) and a guide sleeve pressing piece (53), an inner thread is arranged at the cavity opening of the spray width adjusting cavity (104), the guide sleeve pressing piece (53) is in threaded connection with the cavity opening of the spray width adjusting cavity (104), the third guide sleeve (52) is pressed on the spray width adjusting cavity (104) by the guide sleeve pressing piece (53), the spray width adjusting rod (51) is installed on the guide sleeve pressing piece (53), the outer thread of the spray width adjusting rod (51) is matched with the inner thread of the guide sleeve pressing piece (53), and the rod tip of the spray width adjusting rod (51) is abutted against the spray width adjusting hole (107); the third guide sleeve (52) is used for guiding the spray width adjusting rod (51) and also used for blocking the gas filled into the spray liquid atomization air inlet hole (103) so that the gas cannot leak out of the orifice of the spray width adjusting cavity (104).

7. A lance construction in accordance with claim 1, wherein: the spray atomizing part (60) comprises an atomizing cap (61), the atomizing cap (61) is fixedly arranged on a front seat (13) of the gun body (10), a main atomizing hole (611) is formed in the middle of the atomizing cap (61), two symmetrical atomizing chutes (612) are arranged around the main atomizing hole (611), and spray side holes (613) are formed in the upper side and the lower side of the atomizing cap (61); the muzzle (111) of the muzzle (11) protrudes out of the main atomization hole (611).

8. A lance construction in accordance with claim 1, wherein: the gun body (10) is further provided with a gas-liquid separation monitoring hole (108), and the gas-liquid separation monitoring hole (108) is arranged between the first guide sleeve (42) and the second guide sleeve (44).

9. A lance construction in accordance with claim 1, wherein: the spray gun fixing part (70) comprises a locking screw (71), the gun body (10) is provided with a mounting hole (109), and the locking screw (71) is arranged at the mounting hole (109).

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