Spraying device for anti-burning sticking coating

Abstract

The invention relates to the technical field of flame spraying devices, in particular to an anti-burning sticking coating spraying device which comprises a rack, a workbench is arranged on the rack, a ball valve element is clamped on the workbench and rotates around the rotating axis, and a spraying gun capable of swinging and an adjusting assembly are arranged on the rack. The adjusting assembly can adjust the swinging speed of the spraying gun around the hinged position according to the different sizes of the surfaces with different rotating radiuses of the ball valve element, so that the spraying gun sprays coatings with the same thickness on the surfaces with different rotating radiuses of the ball valve element drum as much as possible, and then the spraying quality of the surfaces of the ball valve element is improved. Meanwhile, the temperature difference of the surface of the ball valve element can be reduced, and therefore the probability that thermal stress is generated in the ball valve element is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of flame spraying devices, in particular to a spraying device for an anti-scorching coating. Background Art

[0002] Flame spraying device is a kind of thermal spraying equipment, which uses high temperature flame to heat the coating material to molten or semi-molten state, and sprays it onto the surface of the workpiece through high-speed airflow to form a coating. It is widely used in the field of surface engineering to improve the wear resistance, corrosion resistance or other surface properties of the workpiece.

[0003] For example, Chinese patent CN201933144U discloses a supersonic flame spraying device, which is mainly composed of a combustion chamber, a temperature control chamber, a Laval nozzle and a front nozzle; the temperature control chamber is located between the combustion chamber and the Laval nozzle; the front end of the Laval nozzle is connected to the front nozzle for spraying out powder particles; the combustion chamber is provided with a fuel nozzle, an oxygen nozzle and a cremation plug for introducing fuel and oxygen and igniting them to generate a high-temperature and high-pressure gas flame flow; the temperature control chamber is provided with an inactive cooling gas nozzle for spraying low-temperature inactive gas to reduce the temperature of the air flow; the connection between the Laval nozzle and the front nozzle is provided with a powder feeding nozzle for spraying raw material powder particles.

[0004] However, when the flame spraying device is used to process spherical workpieces, such as valve balls, uneven spraying is likely to occur due to the curved outer surface of the valve ball. In addition, if the spherical workpiece is large, uneven temperature is likely to occur, with high temperatures at the heated location and low temperatures at other locations. The gap between high and low temperatures is large, which leads to thermal stress inside the valve core and easily causes cracks in the coating on the surface of the valve core. Summary of the invention

[0005] Based on this, it is necessary to provide a spraying device for an anti-sticking coating to address the problem that the current flame spraying device is prone to uneven spraying when processing spherical workpieces and the high temperature easily leads to internal thermal stress.

[0006] The above purpose is achieved through the following technical solutions: A spraying device for an anti-sticking coating, comprising: A frame, wherein a workbench is arranged on the frame, and a clamping assembly is arranged on the workbench to clamp the ball valve core, and the clamping assembly can drive the ball valve core to rotate around its rotation axis; A spray gun, one end of which is hinged on the frame, the hinge position is far away from the ball valve core and the line connecting the hinge position and the center of the ball valve core is perpendicular to the rotation axis of the ball valve core, the other end of the spray gun is suspended in the air, and the spray gun is swung from one end of the rotation axis of the ball valve core to the other end with the hinge position as the center to spray the surface of the ball valve core; An adjusting component, wherein the adjusting component can adjust the swinging speed of the spray gun, and the swinging speed of the spray gun is positively correlated with the distance from the spray gun to the surface of the ball valve core along the spraying direction.

[0007] Furthermore, the adjusting assembly includes a rotating disk and an annular rack, the annular rack is fixed on the frame and the center of the annular rack is on the same vertical line as the center of the ball valve core, the rotating disk is eccentrically arranged inside the annular rack, the rotation center of the rotating disk is close to the hinge position of the spray gun, and the bottom of one suspended end of the spray gun is rotatably connected to a vertically arranged connecting rod, and the lower end of the connecting rod is sleeved with a driving shaft radially distributed along the annular rack, one end of the driving shaft is meshed with the upper surface of the rotating disk, and the other end of the driving shaft is meshed with the annular rack.

[0008] Furthermore, an annular slide rail is provided between the rotating disk and the annular rack, the annular slide rail is coaxial with the annular rack, a slider is slidably provided in the annular slide rail, and the slider is rotatably connected to the driving shaft.

[0009] Furthermore, the spray gun can approach or move away from the ball valve core along the length direction, and a sleeve is fixedly arranged at the bottom of the connecting rod, and the sleeve is sleeved on the outer periphery of the driving shaft, and a plurality of annular grooves are provided on the outer periphery of the driving shaft. A top block is provided on the side wall of the sleeve, and the top block can move radially along the sleeve. When the top block is located in the annular groove, the sleeve rotates along the driving shaft, and when the sleeve is out of the annular groove, the sleeve can move axially along the driving shaft to adjust the distance between the spray gun and the ball valve core.

[0010] Furthermore, a driving mechanism is provided on the frame, and the driving mechanism can drive the rotating disk to rotate around a rotation center.

[0011] Furthermore, the driving mechanism includes a driving motor and a first transmission rod, the first transmission rod is distributed radially along the rotating disk, one end of the first transmission rod is engaged with the bottom of the rotating disk, and the other end of the first transmission rod is engaged with the rotating shaft of the driving motor.

[0012] Furthermore, the clamping assembly includes two vertically arranged support rods and two support frames, the two vertically arranged support rods are fixed on the workbench, the two support frames are respectively connected to the top ends of the two support frames, and an axial through groove is opened on the ball valve core. The two support frames can be inserted into the axial through groove to clamp the ball valve core.

[0013] Furthermore, a telescopic member distributed along the length direction of the axial through slot is provided at the top of the support frame, the telescopic member connects the support frame, and the two support frames are close to each other to make the axis of the axial through slot of the ball valve core coincide with the axis of the telescopic member.

[0014] Furthermore, the telescopic part can rotate around its own axis, and a second transmission rod is rotatably arranged on the frame, one end of the second transmission rod is engaged with the fixed end of the telescopic part, and the second transmission rod rotates to drive the telescopic part to rotate, the telescopic part drives the support frame to rotate, and the support frame drives the ball valve core to rotate.

[0015] Furthermore, a mounting groove is provided on the upper surface of the workbench, and a shift lever is provided on the mounting groove.

[0016] The beneficial effects of the present invention are: The present invention provides an adjustment component, which can adjust the swing speed of the spray gun around the hinge position according to the different sizes of the surfaces of the ball valve core with different rotating radii, so that the spray gun can spray coatings of the same thickness as much as possible on the surfaces of the ball valve core with different rotating radius, thereby improving the spraying quality of the ball valve core surface and reducing the temperature difference on the surface of the ball valve core, thereby reducing the probability of thermal stress generated inside the ball valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a spraying device for an anti-sticking coating provided in one embodiment of the present invention; Figure 2 for Figure 1 A left side view of a spraying device for an anti-stick coating provided in one embodiment; Figure 3 for Figure 2 A cross-sectional view along AA of a spraying device for an anti-stick coating provided in one embodiment; Figure 4 for Figure 2 A cross-sectional view along line BB of a spraying device for an anti-stick coating provided in one embodiment; Figure 5 for Figure 1 A rear view of a spraying device for an anti-stick coating provided in one embodiment; Figure 6 A top view of a spray gun of a spray device for spraying an anti-stick coating provided by an embodiment of the present invention in a state where the spray gun is closest to a ball valve core; Figure 7 A top view of a spray gun of a spray device for spraying an anti-stick coating provided by an embodiment of the present invention in a state where the spray gun is farthest from a ball valve core; Figure 8 A schematic diagram of the structure of a spraying device for an anti-stick coating provided by an embodiment of the present invention without a portion of the frame; Fig. 9 for Figure 8 A front view of a spraying device for an anti-stick coating provided in one embodiment of the present invention with a portion of the frame removed; Fig.10 A schematic diagram of the spraying principle of a spraying device for an anti-sticking coating provided in one embodiment of the present invention.

[0018] in: 100, frame; 110, spray gun; 120, workbench; 130, mounting slot; 140, stop rod; 150, support rod; 160, telescopic member; 170, support frame; 171, fixed plate; 172, hinged rod; 173, abutment plate; 180, fixed block; 190, connecting column; 200, adjustment assembly; 210, rotating disk; 220, annular rack; 230, annular slide rail; 231, slider; 240, vertical rod; 250, telescopic rod; 260, connecting rod; 270, sleeve; 271, top block; 280, driving shaft; 281, friction wheel; 282, transmission gear; 300, driving motor; 310, first transmission rod; 320, second transmission rod; 400, ball valve core; 410, axial through groove; 500, spraying material; 510, heat source; 520, spraying particle beam; 530, coating. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] Refer to the following Figure 1-Figure 10 A spraying device for an anti-sticking coating provided by the present invention is described below.

[0023] A spraying device for an anti-sticking coating is suitable for spraying the surface of a spherical workpiece, comprising a frame 100, a horizontally placed workbench 120 is fixedly arranged on the frame 100, a clamping assembly is arranged on the workbench 120, and the clamping assembly can clamp various spherical workpieces, such as a ball valve core 400, an axial through groove 410 is opened on the ball valve core 400, and the axial through groove 410 passes through the ball valve core 400, and the clamping assembly can clamp the ball valve core 400 and drive the ball valve core 400 to rotate along the axis of the axial through groove 410, and a spray gun 110 is also arranged on the frame 100, and the spray gun 110 is used to spray paint on the surface of the ball valve core 400, and one end of the spray gun 110 is hinged at On the frame 100, the other end of the spray gun 110 is suspended, and the hinge position of the spray gun 110 is away from the position of the ball valve core 400, so that when the spray gun 110 swings at the hinge position, the other end of the spray gun 110 can be sprayed toward the surface of the ball valve core 400, and the line connecting the hinge position of the spray gun 110 and the center of the ball valve core 400 is perpendicular to the axial through groove 410, that is, the line is perpendicular to the rotation axis of the ball valve core 400. The spray gun 110 swings from one end of the rotation axis of the ball valve core 400 to the other end with the hinge position as the center. When the ball valve core 400 rotates around the rotation axis, the spray gun 110 sprays and swings at the same time to spray paint on all surfaces of the ball valve core 400.

[0024] The rotation speed of the ball valve core 400 is constant. If the spray gun 110 also swings at a constant swing speed, uneven spraying will occur on the surface of the ball valve core 400. This is because the ball valve core 400 is a spherical workpiece. When the spray gun 110 swings at a constant speed, the spray gun 110 swings along the rotation axis of the ball valve core 400 from one end to the other end. During the process, the amount of paint sprayed by the spray gun 110 on the surface of the ball valve core 400 with different rotation radii is constant. When the ball valve core 400 rotates at a constant speed, the surface linear speeds of different rotation radii are different. The surface linear speed of a larger rotation radius is larger. The surface with a smaller rotation radius has a smaller linear velocity, that is, the smaller the surface rotation radius is closer to the end of the axial through groove 410 on the ball valve core 400, the smaller the linear velocity is, and the larger the surface rotation radius is closer to the middle of the axial through groove 410, the larger the linear velocity is. At this time, the spraying amount of the spray gun 110 on surfaces with different rotation radii is the same, which will result in the surface closer to the end of the axial through groove 410 being thicker, and the surface closer to the middle of the axial through groove 410 being thinner, which will lead to uneven spraying on the surface of the ball valve core 400 and poor spraying quality.

[0025] The present invention arranges an adjustment component 200 on the frame 100, and the adjustment component 200 can adjust the swing speed of the spray gun 110, so that the swing speed of the spray gun 110 is different when spraying surfaces with different rotation radiuses, that is, the swing speed of the spray gun 110 is positively correlated with the distance from the spray gun 110 to the surface of the ball valve core 400 along the spraying direction. It can be understood that during the swinging process of the spray gun 110, the opening of the spray gun 110 spraying paint (the paint sprayed by the spray gun 110 forms a spray particle beam 520, which is similar to a laser ray, and the spraying path is similar to a columnar ray) is closest to the surface at the middle position of the axial through groove 410 of the ball valve core 400 along the spraying direction. The specific state is as follows Figure 6 As shown, the surface farthest from the end of the axial through groove 410 of the ball valve core 400 is as follows. Figure 7 That is, the spray gun 110 swings at the slowest speed when spraying the surface in the middle of the axial groove 410 of the ball valve core 400, so that the time for the spray gun 110 to move at this position is increased, so that more paint can be sprayed on this surface, and the spray gun 110 swings at the fastest speed when spraying the surface at the end of the axial groove 410 of the ball valve core 400, so that the time for the spray gun 110 to move at this position is the shortest, reducing the paint sprayed on this surface, so as to make the surfaces of the ball valve core 400 with different rotation radii sprayed as consistent as possible, thereby improving the spraying quality.

[0026] It should be noted that the temperature of the paint is heated to an extremely high level during the spraying process of the spray gun 110. When the paint is sprayed on the surface of the ball valve core 400, the surface temperature of the paint increases rapidly, while the temperature of the unsprayed position changes slowly, resulting in a large temperature difference. This may cause thermal stress to be generated inside the ball valve core 400 to reduce the strength of the ball valve core 400, and even cause cracks in the coating 530 on the surface of the ball valve core 400. The above-mentioned adjustment component 200 also has the effect of reducing the probability of thermal stress generation when adjusting the swing speed of the spray gun 110.

[0027] It can be understood that when the spray gun 110 swings to the surface at the middle position of the axial through groove 410 of the ball valve core 400, the spray gun 110 is perpendicular to the tangent of the surface of the ball valve core 400, so that the coverage range of the sprayed paint is minimized, and when the spray gun 110 swings to the surface at the end position of the axial through groove 410 of the ball valve core 400, the spray gun 110 is in an inclined state with the surface at this position, and the range that the paint sprayed by the spray gun 110 can cover is increased, so that the spray gun 110 can heat a larger range of the surface, reduce the temperature difference on the surface of the ball valve core 400, and thus reduce the probability of thermal stress generated inside the ball valve core 400.

[0028] Specifically, the adjustment assembly 200 in the embodiment of the present invention includes a rotating disk 210 and an annular rack 220. Figure 1 As shown, the annular rack 220 is fixedly arranged on the frame 100 and the annular rack 220 is arranged horizontally, the upper end surface of the annular rack 220 is evenly distributed with teeth, and the center of the annular rack 220 and the center of the ball valve core 400 are on the same vertical line, as shown in FIG. Figure 1 and Figure 4 As shown, the annular rack 220 in this embodiment is a half ring, of course, it can also be a complete ring. This embodiment only takes a half ring as an example, and the half ring is located on the right side of the center of the circle. The rotating disk 210 and the annular rack 220 are in the same plane and are eccentrically arranged, such as Figure 8 and Fig. 9 As shown, a connecting column 190 is vertically and fixedly arranged on the frame 100, and a rotating disk 210 is rotatably arranged on the connecting column 190, and the rotation center of the rotating disk 210 is biased toward the hinge position of the spray gun 110, that is, the rotation center of the rotating disk 210 is biased toward the right side of the center of the annular rack 220, and the bottom of one suspended end of the spray gun 110 is rotatably connected with a vertically distributed connecting rod 260, and a driving shaft 280 radially distributed along the annular rack 220 is sleeved on the bottom end of the connecting rod 260, and a friction wheel 281 is coaxially and fixedly connected to one end of the driving shaft 280, and the friction wheel 281 is frictionally engaged with the upper surface of the rotating disk 210, and the engaging position is located on the right side of the rotation center of the rotating disk 210, and the other end of the driving shaft 280 is coaxially and fixedly connected with a transmission gear 282, and the transmission gear 282 is engaged with the teeth on the annular rack 220.

[0029] When the rotating disk 210 rotates around the rotation center, the rotating disk 210 drives the friction wheel 281 to rotate on the rotating disk 210, and the friction wheel 281 drives the driving shaft 280 to rotate, and the driving shaft 280 drives the transmission gear 282 to rotate, so that the driving shaft 280 can move circumferentially along the annular rack 220, and the driving shaft 280 drives the suspended end of the spray gun 110 to swing around the hinge position through the connecting rod 260. Since the rotating disk 210 is eccentrically arranged, the friction wheel 281 will gradually move away from the rotation center of the rotating disk 210 on the rotating disk 210 when the driving shaft 280 moves circumferentially along the annular rack 220. The farther away from the rotation center of the rotating disk 210, the larger the radius of the contact position between the friction wheel 281 and the rotating disk 210, and the linear velocity at this position increases, so that the rotating disk 210 drives the friction wheel 281 to rotate faster.

[0030] It should be noted that when the rotating disk 210 rotates, the linear velocity v at different radial positions on its surface is different, but the angular velocity v at different radial positions is different. is constant, according to the formula It can be seen that when the radius r of the contact position between the friction wheel 281 and the surface of the rotating disk 210 increases, the linear velocity v also increases, so the rotation speed of the friction wheel 281 increases.

[0031] For example, Figure 1 , Figure 4 and Figure 6 As shown, at this time, the spray gun 110 is facing the surface close to the middle position of the axial through groove 410 of the ball valve core 400, and the friction wheel 281 is located on the rotating disk 210 at a position closest to the rotation center of the rotating disk 210, indicating that the rotation speed of the friction wheel 281 is the slowest at this time, that is, the speed at which the drive shaft 280 drives the spray gun 110 to swing is the slowest at this time; Figure 7 As shown, at this time, the spray gun 110 is facing the surface close to the end position of the axial through groove 410 of the ball valve core 400, and the friction wheel 281 is located at a position farther away from the rotation center of the rotating disk 210. At this time, the rotation speed of the friction wheel 281 increases, that is, at this time, the driving shaft 280 drives the spray gun 110 to swing faster.

[0032] More specifically, in order to achieve the above functions, an annular slide rail 230 is provided between the rotating disk 210 and the annular rack 220. Figure 1 and Figure 4As shown, a fixing block 180 is vertically and fixedly arranged on the frame 100, and the fixing block 180 is fixedly connected to the annular slide rail 230, so that the annular slide rail 230 is fixedly connected to the frame 100, and the annular slide rail 230 is also a half-circle ring. The annular slide rail 230 and the annular rack 220 are both located on the right side, and the annular slide rail 230 and the annular rack 220 are coaxial, and a slider 231 is slidingly arranged in the annular slide rail 230, and the slider 231 is rotatably connected to the drive shaft 280. The specific connection method is that a connecting groove is opened on the slider 231, and a bearing (not shown in the figure) is coaxially fixedly arranged in the connecting groove, and the inner ring of the bearing is tightly connected to the outer periphery of the drive shaft 280, so that the drive shaft 280 can only rotate relative to the slider 231 but cannot move relative to the axial direction. When the rotating disk 210 drives the friction wheel 281 to rotate so that the drive shaft 280 moves circumferentially along the annular rack 220, the slider 231 slides in the annular slide rail 230 to limit the axial movement of the drive shaft 280, causing the transmission gear 282 to disengage from the annular rack 220, thereby improving the stability of the rotation of the drive shaft 280.

[0033] It should be noted that the adjustment component 200 is not limited to the above structure. The adjustment component 200 can also be a combination of an intelligent control program and a motor. For example, the rotating shaft of the motor is directly connected to the hinge position of the spray gun 110, and the motor directly drives the spray gun 110 to swing. The intelligent control program controls the rotation speed of the motor and adjusts the rotation speed according to the surface size of the ball valve core 400 with different rotation radii, thereby realizing the above functions. Of course, it can also be other structures, which are not specifically limited here.

[0034] In a further embodiment, the spray gun 110 of the present invention can be moved closer to or farther from the ball valve core 400 along its length direction, which is specifically achieved by the telescopic rod 250, and the structure is as follows: The frame 100 is fixedly connected with a vertical rod 240. Figure 1 , Figure 2 and Figure 4As shown, the vertical pole 240 is arranged vertically, and a telescopic rod 250 is hinged on the top of the vertical pole 240, and the other end of the telescopic rod 250 is fixedly connected to one end of the spray gun 110, that is, the hinge position of the spray gun 110 refers to the hinge between the telescopic rod 250 and the vertical pole 240, and the bottom of the connecting rod 260 at the lower end of the spray gun 110 is fixedly connected to the sleeve 270, and the sleeve 270 is sleeved on the driving shaft 280. A top block 271 is arranged on the side wall of the sleeve 270, and the top block 271 can move radially along the sleeve 270, and A plurality of annular grooves (not shown in the figure) are provided on the outer periphery of the driving shaft 280 along its axial direction. When the top block 271 on the sleeve 270 moves toward the inside of the sleeve 270, the top block 271 is located in one of the annular grooves. At this time, the sleeve 270 is limited so that it can only rotate circumferentially relative to the driving shaft 280 but cannot move axially. When the top block 271 on the sleeve 270 moves outward, the top block 271 is disengaged from the annular groove. At this time, the sleeve 270 can both move along the axial direction of the driving shaft 280 and rotate relative to the driving shaft 280.

[0035] It can be understood that the sleeve 270 is fixedly connected to the connecting rod 260, and the connecting rod 260 is connected to the spray gun 110, so when the sleeve 270 moves axially on the drive shaft 280, the distance between the spray gun 110 and the surface of the ball valve core 400 can be adjusted, thereby adapting to the surface spraying operation of the ball valve core 400 with different diameters. For example, when the diameter of the ball valve core 400 is large, the top block 271 is separated from the annular groove, and the sleeve 270 is pushed to move away from the ball valve core 400. When it moves to a suitable annular groove position, the top block 271 is pushed into the annular groove to limit the axial movement of the sleeve 270; if the diameter of the ball valve core 400 is small, the top block 271 is separated from the annular groove, and the sleeve 270 is pushed to move toward the ball valve core 400. When it moves to a suitable annular groove position, the top block 271 is pushed into the annular groove to limit the axial movement of the sleeve 270.

[0036] It should be noted that more annular grooves can be opened on the drive shaft 280 to accommodate ball valve cores 400 of more different diameters. The number of annular grooves determines the number of ball valve cores 400 that can accommodate different diameters. The number of annular grooves can be set according to demand and is not specifically limited here.

[0037] In a further embodiment, in order to drive the rotating disk 210 to rotate, a driving assembly is provided on the frame 100, and the driving assembly includes a driving motor 300 and a first transmission rod 310, the first transmission rod 310 is rotatably connected to the frame 100, and the first transmission rod 310 is distributed along the radial direction of the rotating disk 210, and a transmission wheel is coaxially and fixedly provided on one end of the first transmission rod 310, and the transmission wheel is frictionally engaged with the bottom of the rotating disk 210, as shown in FIG8 and FIG9 . Fig. 9As shown, the transmission wheel is also conical and is in frictional contact with the bottom surface of the rotating disk 210. The other end of the first transmission rod 310 is coaxially and fixedly provided with a first bevel gear, and the driving motor 300 is fixed on the frame 100. The rotating shaft of the driving motor 300 is meshed with the first bevel gear. The driving motor 300 drives the first transmission rod 310 to rotate through the first bevel gear, and the first transmission rod 310 drives the rotating disk 210 to rotate through the transmission wheel.

[0038] It should be noted that if Figure 8 and Fig. 9 As shown, in this embodiment, there are two drive motors 300 and two first transmission rods 310. The outer circumferences of the two first transmission rods 310 are each provided with a ring sleeve, which is fixedly arranged on the frame 100. The two first transmission rods 310 can rotate relative to the ring sleeve. The function of the ring sleeve is to position the first transmission rod 310. There is no transmission wheel on the end of the other first transmission rod 310 close to the rotating disk 210, so only one drive motor 300 can drive the rotating disk 210 to rotate.

[0039] Specifically, the clamping assembly in the embodiment of the present invention includes two vertically arranged support rods 150 and two support frames 170. The two vertically arranged support rods 150 are fixedly arranged on the workbench 120. The distance between the two support rods 150 is large enough to adapt to a ball valve core 400 with a larger diameter, and of course, it can also adapt to a ball valve core 400 with a smaller diameter. The two support frames 170 are connected to the tops of the two support rods 150. The two support frames 170 can pass through the axial through groove 410 of the ball valve core 400, thereby clamping the ball valve core 400.

[0040] More specifically, the top ends of the two vertically arranged support rods 150 are provided with telescopic members 160 distributed along the length direction of the axial through slot 410, and the telescopic ends of the telescopic members 160 are connected to the support frame 170, which specifically includes a fixed plate 171, an abutment plate 173 and at least three sets of articulated arms, such as Figure 3As shown, each set of articulated arms is composed of two articulated rods 172, the two articulated rods 172 are articulated to each other, and a torsion spring (not shown in the figure) is provided at the articulated position, the torsion spring can make the two articulated rods 172 maintain a certain angle, and the tips formed at the articulated positions of the two articulated rods 172 are close to the inner wall of the axial through groove 410, and the ends of the two articulated rods 172 that are away from each other are respectively articulated to the fixed plate 171 and the abutment plate 173. The fixed disk 171 is fixedly connected to the telescopic end of the telescopic member 160. When the two telescopic members 160 push the two fixed disks 171 towards each other, the two abutting disks 173 abut against each other. When the two telescopic members 160 continue to push the fixed disks 171, the angle formed by the two hinged rods 172 of each group of hinged arms gradually decreases, and the hinged positions of the two hinged rods 172 gradually approach the inner wall of the axial through groove 410 of the ball valve core 400. When the hinged positions of the two hinged rods 172 are tightly abutted against the inner wall of the axial through groove 410, the axis of the axial through groove 410 of the ball valve core 400 coincides with the axis of the telescopic member 160, thereby completing the clamping of the ball valve core 400.

[0041] It should be noted that the telescopic member 160 may be a telescopic structure such as a hydraulic cylinder or a telescopic cylinder, and is not specifically limited here.

[0042] In a further embodiment, in order to drive the ball valve core 400 to rotate around the rotation axis, the fixed end of the telescopic member 160 is rotatably set on the support rod 150, the fixed end of the telescopic member 160 is coaxially and fixedly connected with a second bevel gear, and a second transmission rod 320 is rotatably set on the frame 100, and the two ends of the second transmission rod 320 are respectively coaxially and fixedly set with a third bevel gear, and at the same time, a fourth bevel gear is coaxially and fixedly connected to the outer end of the first bevel gear of the first transmission rod 310, and the third bevel gears at both ends of the second transmission rod 320 are respectively connected with the second bevel gear on the fixed end of the telescopic member 160 and the first transmission rod 310 The fourth bevel gear at the outer end is meshed, and the diameters of multiple bevel gears are set as required to achieve the required transmission ratio. The two drive motors 300 in this embodiment rotate to drive the first transmission rod 310 to rotate while driving the second transmission rod 320 to rotate. The second transmission rod 320 can drive the ball valve core 400 to rotate through multiple bevel gears. The two drive motors 300 rotate in opposite directions to ensure that the ball valve core 400 is driven to rotate in the same direction. If the two drive motors 300 rotate in the same direction, the ball valve core 400 cannot be driven to rotate. Therefore, in this embodiment, the two drive motors 300 are set to have opposite rotation directions.

[0043] In a further embodiment, in order to facilitate the installation of the ball valve core 400, a mounting groove 130 is opened on the workbench 120, and the mounting groove 130 is a V-shaped groove. The length direction of the mounting groove 130 is perpendicular to the line connecting the two vertical poles 240, and the mounting groove 130 is located in the middle of the two vertical poles 240. The ball valve core 400 can be positioned through the mounting groove 130 for easy installation.

[0044] More specifically, a stopper rod 140 is further provided on the installation groove 130 . The stopper rod 140 is horizontally distributed on the surface of the workbench 120 . The stopper rod 140 is perpendicular to the installation groove 130 . The stopper rod 140 can prevent the ball valve core 400 from being separated from the workbench 120 during installation.

[0045] Specifically, in the embodiment of the present invention, the spray gun 110 is a supersonic flame spray gun 110, and the coating is prepared as follows: The alloy powders used in the preparation of coatings mainly include base powder, bottom powder, anti-corrosion powder, qualitative powder, filling powder and adjusting powder. The six alloy powders are ball-milled, screened and stirred in a certain proportion to finally synthesize three alloy powders: composite alloy powder A, composite alloy powder B and composite alloy powder C.

[0046] Among them, the main components of composite alloy powder A are Cr19-20, Ni5.0, Fe:Bal, the main components of composite alloy powder B are Al5.5, Mo5, Fe:Bal, and the main components of composite alloy powder C are Sn90, Sb7-8, W3-4.

[0047] Spraying steps: After the coating is prepared, it is loaded into the spray gun 110. Before spraying, a multifunctional sandblasting machine is first used to spray 36-mesh zirconium oxide shot peening to clean and roughen the surface of the ball valve core 400; Then, the alloy powder is fed into the supersonic flame of the spray gun 110 by using the supersonic flame spraying equipment to heat and accelerate the alloy powder. Fig.10 As shown, the alloy powder spray material 500 is heated and accelerated by the heat source 510 of the spray gun 110 to form a spray particle beam 520 which is sprayed on the surface of the ball valve core 400. During the spraying, the three composite alloy powders A, B, and C are sprayed alternately, so that the alloy powders collide with the surface of the ball valve core 400 at high speed, and finally a mechanical bond is formed between the alloy powders and the surface of the ball valve core 400, thereby forming a multifunctional composite coating 530. Finally, a diamond abrasive belt is used for rough grinding, multi-step fine grinding, and grinding and polishing to make the coating 530 reach a mirror surface.

[0048] The specific working process of the spraying device of the anti-sticking coating provided by the present invention is described in combination with the above embodiments: Install: The telescopic member 160 is controlled to shorten so that the two abutment plates 173 are disengaged, and the ball valve core 400 is positioned through the installation groove 130, and then the abutment plates 173 and multiple groups of articulated arms are inserted into the axial through groove 410 of the ball valve core 400, and the telescopic member 160 is controlled to extend to push the two fixed plates 171 closer to each other, and the two fixed plates 171 push the multiple groups of articulated arms and the abutment plates 173 closer to each other. After the two abutment plates 173 abut, the hinge positions of the two articulated rods 172 of each group of articulated arms gradually and tightly abut against the inner wall of the axial through groove 410 of the ball valve core 400, and the telescopic member 160 is stopped from continuing to extend, and the installation of the ball valve core 400 is completed.

[0049] Adjust the distance between the spray gun 110 and the surface of the ball valve core 400: In the initial state as shown in FIG. 7 , the spray gun 110 is facing the surface at the end of the axial through groove 410 of the ball valve core 400. The position of the sleeve 270 on the drive shaft 280 is adjusted according to the diameter of the ball valve core 400 to adjust the distance between the spray gun 110 and the surface of the ball valve core 400. After the adjustment is completed, the top block 271 on the sleeve 270 is pushed into the annular groove of the drive shaft 280. At the same time, the friction wheel 281 on the drive shaft 280 is located on the rotating disk 210 at a position far from the rotation center of the rotating disk 210.

[0050] Start spraying: The drive motor 300 and the spray gun 110 are started, and the spray gun 110 sprays at a uniform speed. The drive motor 300 drives the first transmission rod 310 and the second transmission rod 320 to rotate, and the second transmission rod 320 drives the ball valve core 400 to rotate around the rotation axis. The first transmission rod 310 drives the rotating disk 210 to rotate, and the rotating disk 210 drives the friction wheel 281 to rotate. The friction wheel 281 drives the transmission gear 282 to rotate through the drive shaft 280. Since the transmission gear 282 is meshed with the annular rack 220, the transmission gear 282 rotates on the annular rack 220 along the circumferential direction of the annular rack 220 to drive the drive shaft 280 to move. The drive shaft 280 drives the spray gun 110 to swing through the sleeve 270 and the connecting rod 260, specifically, the rotation center is counterclockwise (with the hinge position of the telescopic rod 250 and the vertical rod 240 as the rotation center). Figure 7 The spraying operation is started by swinging the paint in a counterclockwise direction (as shown when viewed from top to bottom).

[0051] Swing speed from fast to slow: During the swinging process, the friction wheel 281 on the driving shaft 280 first gradually moves to a position close to the rotation center of the rotating disk 210, and the rotating disk 210 drives the friction wheel 281 to rotate at a reduced speed, thereby reducing the counterclockwise swinging speed of the spray gun 110 driven by the driving shaft 280. When the spray gun 110 swings to the surface at the middle position of the axial through groove 410 of the ball valve core 400, as shown in FIG. Figure 6As shown, the friction wheel 281 on the drive shaft 280 is closest to the rotation center of the rotating disk 210. At this time, the rotation speed of the friction wheel 281 is reduced to the slowest, and the drive shaft 280 drives the spray gun 110 to swing at the slowest speed, so that more paint is sprayed on the position with the largest surface area of ​​the ball valve core 400.

[0052] Swing speed from slow to fast: The friction wheel 281 on the drive shaft 280 begins to gradually move away from the rotation center of the rotating disk 210, the speed at which the rotating disk 210 drives the friction wheel 281 to rotate increases, the circumferential movement speed of the drive shaft 280 along the annular rack 220 increases, and the swing speed of the spray gun 110 driven by the drive shaft 280 increases until the spray gun 110 faces the surface of the other end position of the axial through groove 410 of the ball valve core 400, the swing speed reaches the fastest, the spray gun 110 can spray less paint on the position with the smallest surface area of ​​the ball valve core 400, thereby completing the spraying, and the spraying thickness on the surface of the ball valve core 400 is roughly the same, thereby improving the spraying quality of the ball valve core 400.

[0053] After spraying is completed, the driving motor 300 and the spray gun 110 are turned off, and the ball valve core 400 can be removed after the coating 530 on the surface of the ball valve core 400 cools down, and the ball valve core 400 is subsequently processed.

[0054] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A spraying device for an anti-stick coating, characterized in that: include: A frame, wherein a workbench is arranged on the frame, and a clamping assembly is arranged on the workbench to clamp the ball valve core, and the clamping assembly can drive the ball valve core to rotate around its rotation axis; A spray gun, one end of which is hinged on the frame, the hinge position is far away from the ball valve core and the line connecting the hinge position and the center of the ball valve core is perpendicular to the rotation axis of the ball valve core, the other end of the spray gun is suspended in the air, and the spray gun is swung from one end of the rotation axis of the ball valve core to the other end with the hinge position as the center to spray the surface of the ball valve core; An adjusting component, wherein the adjusting component can adjust the swinging speed of the spray gun, and the swinging speed of the spray gun is positively correlated with the distance from the spray gun to the surface of the ball valve core along the spraying direction.

2. The spraying device of the anti-stick coating according to claim 1, characterized in that: The adjusting assembly includes a rotating disk and an annular rack, the annular rack is fixed on the frame and the center of the annular rack is on the same vertical line as the center of the ball valve core, the rotating disk is eccentrically arranged inside the annular rack, the rotation center of the rotating disk is close to the hinge position of the spray gun, the bottom of one suspended end of the spray gun is rotatably connected with a vertically arranged connecting rod, the lower end of the connecting rod is sleeved with a driving shaft radially distributed along the annular rack, one end of the driving shaft is meshed with the upper surface of the rotating disk, and the other end of the driving shaft is meshed with the annular rack.

3. The spraying device of the anti-stick coating according to claim 2, characterized in that: An annular slide rail is arranged between the rotating disk and the annular rack, the annular slide rail and the annular rack are coaxial, a slider is slidably arranged in the annular slide rail, and the slider is rotationally connected to the driving shaft.

4. The spraying device of the anti-stick coating according to claim 3 is characterized in that: The spray gun can approach or move away from the ball valve core along the length direction, a sleeve is fixedly arranged at the bottom of the connecting rod, the sleeve is sleeved on the outer periphery of the driving shaft, a plurality of annular grooves are provided on the outer periphery of the driving shaft, a top block is arranged on the side wall of the sleeve, the top block can move along the radial direction of the sleeve, when the top block is located in the annular groove, the sleeve rotates along the driving shaft, when the sleeve is out of the annular groove, the sleeve can move along the axial direction of the driving shaft to adjust the distance between the spray gun and the ball valve core.

5. The spraying device of the anti-stick coating according to claim 2, characterized in that: The frame is provided with a driving mechanism, and the driving mechanism can drive the rotating disk to rotate around a rotation center.

6. The spraying device of the anti-stick coating according to claim 5, characterized in that: The driving mechanism includes a driving motor and a first transmission rod, wherein the first transmission rod is distributed radially along the rotating disk, one end of the first transmission rod is meshed with the bottom of the rotating disk, and the other end of the first transmission rod is meshed with the rotating shaft of the driving motor.

7. The spraying device of the anti-stick coating according to claim 1, characterized in that: The clamping assembly includes two vertically arranged support rods and two support frames. The two vertically arranged support rods are fixed on the workbench. The two support frames are respectively connected to the top ends of the two support frames. An axial through groove is opened on the ball valve core. The two support frames can be inserted into the axial through groove to clamp the ball valve core.

8. The spraying device of the anti-stick coating according to claim 7, characterized in that: The top of the support frame is provided with telescopic parts distributed along the length direction of the axial through slot, the telescopic parts connect the support frames, and the two support frames are close to each other so that the axis of the axial through slot of the ball valve core coincides with the axis of the telescopic parts.

9. The spraying device of the anti-stick coating according to claim 8, characterized in that: The telescopic member can rotate around its own axis. A second transmission rod is rotatably arranged on the frame. One end of the second transmission rod is engaged with the fixed end of the telescopic member. The second transmission rod rotates to drive the telescopic member to rotate. The telescopic member drives the support frame to rotate, and the support frame drives the ball valve core to rotate.

10. The spraying device of the anti-stick coating according to claim 1, characterized in that: The upper surface of the workbench is provided with a mounting groove, and a shift rod is arranged on the mounting groove.

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