A blow-off device for a thermal spray gun

Abstract

The application relates to the technical field of thermal spraying devices, and discloses a blowing device for a thermal spraying gun, which comprises a hand-held handle, a mixing component is fixedly installed at the top of the hand-held handle, an air inlet valve is arranged at the top left side of the mixing component, an air inlet component is fixedly installed at the left end of the mixing component, a feeding component is arranged inside the mixing component and the air inlet component along the axis of the mixing component and the air inlet component, and a nozzle component is sleeved at the right end of the feeding component. By rotating the assembly of the straight cylinder part, the cylinder part, the contraction part and the annular flange, the straight cylinder part is separated from the right end of the connecting pipe, and then the supporting component is taken off from the right end of the feeding component, so that the nozzle component and the supporting component can be cleaned, the inclined part is exposed, the end of the inclined part is also convenient to clean, and in addition, high-speed air can be introduced into the air inlet pipe to discharge the solid particles such as coating materials in the spiral channel, so that the purpose of conveniently cleaning the coating materials at the nozzle is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermal spraying device, in particular to a blowing device for thermal spraying gun. BACKGROUND

[0002] Thermal spraying processing is to spray the molten coating material on the surface of the workpiece by high-pressure air. When thermal spraying is carried out, the operator usually holds the thermal spraying gun and aims at the surface of the workpiece for processing. The coating material channel and the blowing channel of the thermal spraying gun are connected at the front end of the thermal spraying gun, so that the coating material is sprayed under the action of blowing.

[0003] When thermal spraying processing is carried out by the thermal spraying gun, since the coating material is mainly sprayed by airflow, when the air supply part stops blowing, the molten coating material is easily attached to the head of the thermal spraying gun, causing the inner diameter of the spray head to gradually decrease, which is not easy to clean and affects the normal use of subsequent thermal spraying.

[0004] We set a thermal spraying gun with a detachable head, so that after processing is completed, the head can be easily detached for cleaning the coating material in the spray, and a spiral channel is arranged in the air supply channel, so that the combustible gas can be mixed with air and flow in the spiral channel by air, the solid stains in the spiral channel can be sprayed out for cleaning, thereby a blowing device for thermal spraying gun is provided. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present application provides a blowing device for thermal spraying gun, which has the advantages of convenient cleaning of coating material at the spray head, and solves the problem that the coating material is easily attached to the spray head of the thermal spraying gun.

[0007] (II) Technical solutions

[0008] In order to achieve the above-mentioned purpose of conveniently cleaning the coating material at the spray head, the present application provides the following technical solutions: a blowing device for thermal spraying gun, comprising a hand-held handle, a mixing part is fixedly installed at the top of the hand-held handle, an air inlet valve is arranged at the top left side of the mixing part, an air inlet part is fixedly installed at the left end of the mixing part, a feeding part is arranged inside the mixing part and the air inlet part along the axis thereof, a spray head part is sleeved at the right end of the feeding part, the spray head part is threadedly connected at the right end of the mixing part, and a supporting part is arranged between the spray head part and the feeding part.

[0009] Preferably, the mixing component comprises a connecting pipe fixedly installed at the top end of the handheld handle, a helical plate fixedly installed on the inner wall of the connecting pipe, and a threaded groove formed on the outer wall of the right end of the connecting pipe.

[0010] Preferably, the air inlet valve comprises a vertical pipe fixedly installed at the top of the left end of the connecting pipe, a steel ball rotatably connected to the inside of the vertical pipe, a ball-shaped groove formed on the connecting portion of the vertical pipe and the connecting pipe and matched with the steel ball, a through hole formed through the surface of the steel ball, the opening of the through hole initially horizontally facing the front side, a baffle fixedly installed at the bottom of the steel ball, the baffle being perpendicular to the axis of the steel ball, the baffle extending to the inside of the connecting pipe, springs fixedly installed on the front and back sides of the baffle, the other ends of the springs being fixedly installed on the inner wall of the connecting pipe, and a non-woven fabric detachably installed at the top end of the vertical pipe.

[0011] Preferably, the air inlet component comprises a connecting cylinder fixedly installed at the left end of the connecting pipe, and an air inlet pipe fixedly installed at the bottom of the connecting cylinder.

[0012] Preferably, the feeding component comprises a straight pipe portion arranged along the axis of the connecting cylinder and the helical plate, the straight pipe portion being fixedly installed with the helical plate and the connecting cylinder, an arc-shaped portion arranged at the right end of the straight pipe portion, an inclined portion arranged at the right side of the arc-shaped portion, and the right end of the inclined portion being arranged inside the opening of the nozzle component.

[0013] Preferably, the nozzle component comprises a straight cylinder portion, a cylindrical portion and a shrinkage portion integrally formed at the right side of the straight cylinder portion, the shrinkage portion being arranged at the right side of the cylindrical portion, a thread matched with the threaded groove arranged on the left end inner wall of the straight cylinder portion, the straight cylinder portion being threadedly connected at the threaded groove of the right end of the connecting pipe, the inner wall of the cylindrical portion being parallel to the outer wall of the inclined portion, the right end of the inclined portion being arranged at the middle portion of the shrinkage portion, an annular flange integrally formed at the left end of the straight cylinder portion, a rubber ring arranged at the left end of the annular flange, the rubber ring being sleeved at the right end of the connecting pipe, the cross section of the rubber ring being in the shape of C, and the annular flange being inserted into the inside of the rubber ring.

[0014] Preferably, the supporting component comprises a plurality of partition plates arranged between the outer wall of the inclined portion and the inner wall of the cylindrical portion, an annular baffle fixedly installed at the left end of the partition plate, the outer diameter of the annular baffle being equal to the outer diameter of the right end of the connecting pipe, the annular baffle abutting against the right end of the connecting pipe, a plurality of insertion blocks arranged at the left side of the annular baffle, the insertion blocks being inserted into the right end of the connecting pipe, and the side of the insertion blocks away from the axis of the annular baffle abutting against the inner wall of the connecting pipe.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the present application provides a blowing device for thermal spraying gun, which has the following beneficial effects:

[0017] 1. The blowing device for thermal spraying gun, after the thermal spraying process is completed, the straight cylinder part is separated from the right end of the connecting pipe by rotating the assembly of the straight cylinder part, the cylindrical part, the constricted part and the annular flange, and then the supporting part is removed from the right end of the feeding part, so that the nozzle part and the supporting part can be cleaned, the inclined part is exposed, and the end of the inclined part is also convenient to clean. In addition, high-speed air can be introduced into the air inlet pipe, so that the high-speed air is sprayed from the spiral channel to discharge the solid particles such as coating material in the spiral channel. Thus, the purpose of conveniently cleaning the coating material at the nozzle is achieved.

[0018] 2. The blowing device for thermal spraying gun, the combustible gas enters the inside of the connecting cylinder through the air inlet pipe, and then enters the spiral channel inside the connecting pipe through the connecting hole. Since the flow rate of the combustible gas is large, the air pressure in the spiral channel is less than the air pressure outside the connecting pipe, and the deflector is deflected by the flow of the combustible gas. The through hole connects the connecting pipe and the vertical pipe, and under the action of the pressure difference, the external air enters the spiral channel through the vertical pipe and the through hole. The mixture of combustible gas and air in the spiral channel is mixed uniformly, and the mixed gas enters the nozzle part and is separated into multiple channels by the partition, so that the mixed gas is uniformly sprayed from the constricted part, and the flow of the mixed gas drives the coating material to be sprayed through the straight pipe part, the arc part and the inclined part, so that the filamentous coating material is heated and melted by the combustion of the combustible gas and is sprayed along the airflow. Thus, the effect of automatically mixing the combustible gas and air uniformly is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The present application provides a blowing device for thermal spraying gun, which has the following beneficial effects:

[0020] Figure 2 The present application provides a blowing device for thermal spraying gun, which has the following beneficial effects:

[0021] Figure 3 The present application provides a blowing device for thermal spraying gun, which has the following beneficial effects:

[0022] Figure 4 The present application provides a blowing device for thermal spraying gun, which has the following beneficial effects:

[0023] Figure 5 The present application provides a blowing device for thermal spraying gun, which has the following beneficial effects: Figure 2A schematic diagram of the enlarged structure of the details in the middle;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the support component of a blowing device for a thermal spray gun proposed by the present invention.

[0025] In the figure: 1. Handle; 2. Mixing component; 3. Inlet valve; 4. Inlet component; 5. Feeding component; 6. Nozzle component; 7. Support component; 21. Connecting pipe; 22. Spiral plate; 23. Threaded groove; 31. Vertical pipe; 32. Steel ball; 33. Through hole; 34. Baffle; 35. Spring; 36. Non-woven fabric; 41. Connecting cylinder; 42. Inlet pipe; 43. Connecting hole; 51. Straight pipe portion; 52. Arc portion; 53. Inclined portion; 61. Straight tube portion; 62. Cylindrical portion; 63. Contraction portion; 64. Annular flange; 65. Rubber ring; 71. Partition; 72. Annular baffle; 73. Insert block. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figures 1-2 A blowing device for a thermal spray gun includes a hand-held handle 1, a mixing component 2 is fixedly installed on the top of the hand-held handle 1, an air intake valve 3 is provided on the left side of the top of the mixing component 2, an air intake component 4 is fixedly installed on the left end of the mixing component 2, a feeding component 5 is provided inside the mixing component 2 and the air intake component 4 along their axis, a nozzle component 6 is sleeved on the right end of the feeding component 5, the nozzle component 6 is threadedly connected to the right end of the mixing component 2, and a supporting component 7 is provided between the nozzle component 6 and the feeding component 5.

[0028] See also Figures 1-4, the mixing component 2 comprises a connecting pipe 21 fixedly installed at the top end of the handle 1, the inner wall of the connecting pipe 21 is fixedly installed with a spiral plate 22, the outer wall of the right end of the connecting pipe 21 is provided with a threaded groove 23, the air inlet component 4 comprises a connecting cylinder 41 fixedly installed at the left end of the connecting pipe 21, the bottom of the connecting cylinder 41 is fixedly installed with an air inlet pipe 42, the combustible gas enters the inside of the connecting cylinder 41 through the air inlet pipe 42, and then enters the inside of the connecting pipe 21 through the connecting hole 43. The right lower part of the air inlet pipe 42 is provided with the connecting hole 43. The feeding component 5 comprises a straight pipe part 51, the straight pipe part 51 is arranged along the axis of the connecting cylinder 41 and the spiral plate 22, the straight pipe part 51 is fixedly installed with the spiral plate 22 and the connecting cylinder 41, so that the connecting pipe 21, the spiral plate 22 and the straight pipe part 51 form a spiral channel in the inside of the connecting pipe 21, the combustible gas enters the spiral channel from the connecting hole 43, and flows from right to left along the spiral channel. The right end of the straight pipe part 51 is provided with an arc-shaped part 52, the right side of the arc-shaped part 52 is provided with an inclined part 53, the right end of the inclined part 53 is arranged in the opening of the nozzle component 6, and the filamentous coating material is continuously transported to the right through the inside of the straight pipe part 51, the arc-shaped part 52 and the inclined part 53.

[0029] Please refer to Figures 1-4 , the air inlet valve 3 is communicated at the top of the left end of the connecting pipe 21, and the vertical projection of the air inlet valve 3 in the vertical direction is located between the gaps of the spiral plate 22. The air inlet valve 3 comprises a vertical pipe 31 fixedly installed at the top of the left end of the connecting pipe 21, a steel ball 32 rotatably connected in the inside of the vertical pipe 31, a ball-shaped groove matched with the steel ball 32 is arranged at the connecting position of the vertical pipe 31 and the connecting pipe 21, a through hole 33 is arranged through the surface of the steel ball 32, the opening of the through hole 33 is initially horizontally directed to the front side, so that in the normal state, the opening of the through hole 33 is blocked by the inner wall of the vertical pipe 31 and the connecting pipe 21, and the vertical pipe 31 is in a closed state. The bottom of the steel ball 32 is fixedly installed with a baffle 34, the baffle 34 is perpendicular to the axis of the steel ball 32, the baffle 34 extends to the inside of the connecting pipe 21, the front and back sides of the baffle 34 are fixedly installed with springs 35, the other ends of the springs 35 are fixedly installed on the inner wall of the connecting pipe 21, so that when the combustible gas flows in the spiral channel, the baffle 34 is pushed by the gas flow, so as to drive the steel ball 32 to deflect in the ball-shaped groove, so that the through hole 33 connects the vertical pipe 31 and the connecting pipe 21 together, and then the external air can enter the inside of the connecting pipe 21 through the vertical pipe 31, so as to mix the air and the combustible gas uniformly. The top end of the vertical pipe 31 is detachably installed with a non-woven fabric 36. Through the arrangement of the non-woven fabric 36, the top end of the vertical pipe 31 is sealed, so as to filter the air entering the vertical pipe 31.

[0030] Please refer to Figures 1-6The spray head component 6 comprises a straight cylinder part 61, a cylindrical part 62 and a shrink part 63 integrally formed on the right side of the straight cylinder part 61, the shrink part 63 is located on the right side of the cylindrical part 62, and the inner diameter of the shrink part 63 gradually decreases from left to right. The left end inner wall of the straight cylinder part 61 is provided with a thread matched with the thread groove 23, so that the straight cylinder part 61 can be detachably installed at the right end of the connecting pipe 21. The straight cylinder part 61 is threadedly connected at the thread groove 23 at the right end of the connecting pipe 21, the inner wall of the cylindrical part 62 is parallel to the outer wall of the inclined part 53, so that a hollow circular platform-shaped channel is formed at the inclined part 53 and the cylindrical part 62. The right end of the inclined part 53 is located in the middle of the shrink part 63. The left end of the straight cylinder part 61 is integrally formed with an annular flange 64, the left end of the annular flange 64 is provided with a rubber ring 65, the rubber ring 65 is sleeved on the right end of the connecting pipe 21, the cross section of the rubber ring 65 is C-shaped, and the annular flange 64 is inserted into the inside of the rubber ring 65, so that when the straight cylinder part 61 is installed at the right end of the connecting pipe 21, the rubber ring 65 and the annular flange 64 cooperate to seal between the straight cylinder part 61 and the connecting pipe 21.

[0031] Please refer to Figure 2 and Figure 6 The support component 7 comprises a partition plate 71 arranged in an array between the outer wall of the inclined part 53 and the inner wall of the cylindrical part 62, which equally divides the channel between the cylindrical part 62 and the inclined part 53 into multiple parts, so that the airflow is more uniform when sprayed from the shrink part 63, and the cylindrical part 62 is supported by the partition plate 71. The left end of the partition plate 71 is fixedly installed with an annular baffle 72, the outer diameter of the annular baffle 72 is equal to the outer diameter of the right end of the connecting pipe 21, the annular baffle 72 abuts against the right end of the connecting pipe 21, the left side of the annular baffle 72 is arranged with an insertion block 73, the insertion block 73 is inserted into the right end of the connecting pipe 21, and the side of the insertion block 73 away from the axis of the annular baffle 72 abuts against the inner wall of the connecting pipe 21. Therefore, when the insertion block 73 is inserted into the right end of the connecting pipe 21, the annular baffle 72 is blocked at the edge of the right end of the connecting pipe 21, and the inner wall of the cylindrical part 62 is tightly attached to the surface of the partition plate 71, so that the support component 7 is stably arranged between the spray head component 6 and the feeding component 5.

[0032] In use, the combustible gas enters the interior of the connecting cylinder 41 through the gas inlet pipe 42, and then enters the spiral channel in the interior of the connecting pipe 21 through the connecting hole 43. Since the flow rate of the combustible gas is large, the air pressure in the spiral channel is less than the air pressure outside the connecting pipe 21, and the deflector 34 is deflected by the flow of the combustible gas. The through hole 33 connects the connecting pipe 21 and the vertical pipe 31, and the outside air enters the spiral channel through the vertical pipe 31 and the through hole 33 under the action of the air pressure difference. The combustible gas and the air are mixed uniformly in the spiral channel, the mixed gas enters the spray head part 6, and is separated into multiple channels by the partition 71, so that the mixed gas is uniformly sprayed from the converging part 63, and the flow of the mixed gas drives the coating material to pass through the straight pipe part 51, the arc part 52 and the inclined part 53 to be sprayed, so that the filamentous coating material is heated and melted by the combustion of the combustible gas, and is sprayed along with the airflow.

[0033] After the thermal spraying process is completed, the assembly of the straight cylinder part 61, the cylindrical part 62, the converging part 63 and the annular flange 64 is rotated, the straight cylinder part 61 is separated from the right end of the connecting pipe 21, and the support part 7 is removed from the right end of the feeding part 5, so that the spray head part 6 and the support part 7 can be cleaned, the inclined part 53 is exposed, and the end of the inclined part 53 is also convenient to clean. In addition, high-speed air can be introduced into the gas inlet pipe 42, so that the high-speed air is sprayed from the spiral channel to discharge the solid particles such as the coating material in the spiral channel.

[0034] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A blow device for a thermal spraying gun comprising a handgrip (1), characterized in that: The top of the handheld handle (1) is fixedly installed with a mixing part (2), the top left side of the mixing part (2) is provided with an air inlet valve (3), the left end of the mixing part (2) is fixedly installed with an air inlet part (4), the inside of the mixing part (2) and the air inlet part (4) is provided with a feeding part (5) along the axis thereof, the right end of the feeding part (5) is sleeved with a spray head part (6), the spray head part (6) is threadedly connected at the right end of the mixing part (2), and the spray head part (6) and the feeding part (5) are provided with a supporting part (7). The mixing part (2) comprises a connecting pipe (21) fixedly installed at the top end of the handheld handle (1), a spiral plate (22) is fixedly installed on the inner wall of the connecting pipe (21), a threaded groove (23) is formed in the outer wall of the right end of the connecting pipe (21), the air inlet valve (3) is communicated at the top of the left end of the connecting pipe (21), and the vertical projection of the air inlet valve (3) is located between the gaps of the spiral plate (22). The air inlet valve (3) comprises a vertical pipe (31) fixedly installed at the top of the left end of the connecting pipe (21), a steel ball (32) is rotatably connected in the vertical pipe (31), a ball-shaped groove matched with the steel ball (32) is formed at the connecting position of the vertical pipe (31) and the connecting pipe (21), a through hole (33) is formed in the surface of the steel ball (32), the opening of the through hole (33) initially faces the front side horizontally, a baffle (34) is fixedly installed at the bottom of the steel ball (32), the baffle (34) is perpendicular to the axis of the steel ball (32), the baffle (34) extends into the inside of the connecting pipe (21), springs (35) are fixedly installed on the front and rear sides of the baffle (34), the other end of the spring (35) is fixedly installed on the inner wall of the connecting pipe (21), and a non-woven fabric (36) is detachably installed at the top end of the vertical pipe (31).

2. The blowpipe for a thermal spray gun of claim 1, wherein: The air inlet part (4) comprises a connecting cylinder (41) fixedly installed at the left end of the connecting pipe (21), and an air inlet pipe (42) is fixedly installed at the bottom of the connecting cylinder (41).

3. The blowpipe for a thermal spray gun of claim 1, wherein: The feeding part (5) comprises a straight pipe part (51), the straight pipe part (51) is arranged along the axis of the connecting cylinder (41) and the spiral plate (22), the straight pipe part (51) is fixedly installed with the spiral plate (22) and the connecting cylinder (41), an arc-shaped part (52) is arranged at the right end of the straight pipe part (51), an inclined part (53) is arranged at the right side of the arc-shaped part (52), and the right end of the inclined part (53) is arranged in the opening of the spray head part (6).

4. The blowpipe for a thermal spray gun of claim 1, wherein: The nozzle part (6) comprises a straight cylinder part (61), a cylindrical part (62) and a shrink part (63) are integrally formed on the right side of the straight cylinder part (61), the shrink part (63) is located on the right side of the cylindrical part (62), the left end inner wall of the straight cylinder part (61) is provided with threads matched with the thread groove (23), the straight cylinder part (61) is threadedly connected at the thread groove (23) of the right end of the connecting pipe (21), the inner wall of the cylindrical part (62) is parallel to the outer wall of the inclined part (53), the right end of the inclined part (53) is located in the middle of the shrink part (63), the left end of the straight cylinder part (61) is integrally formed with an annular flange (64), the left end of the annular flange (64) is provided with a rubber ring (65), the rubber ring (65) is sleeved on the right end of the connecting pipe (21), the cross section of the rubber ring (65) is C-shaped, and the annular flange (64) is inserted into the inside of the rubber ring (65).

5. The blowpipe assembly for a thermal spray gun of claim 1, wherein: The support part (7) comprises a partition plate (71) arranged between the outer wall of the inclined part (53) and the inner wall of the cylindrical part (62), the left end of the partition plate (71) is fixedly installed with an annular baffle (72), the outer diameter of the annular baffle (72) is equal to the outer diameter of the right end of the connecting pipe (21), the annular baffle (72) abuts against the right end of the connecting pipe (21), and the left side of the annular baffle (72) is arranged with an insertion block (73) in an array, the insertion block (73) is inserted into the right end of the connecting pipe (21), and the side, away from the axis of the annular baffle (72), of the insertion block (73) abuts against the inner wall of the connecting pipe (21).

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