CN115976450A - Automatic spraying device for metal surface coating - Google Patents

Abstract

The invention belongs to the technical field of surface treatment of metal parts, and particularly relates to an automatic spraying device for a metal surface coating. Including spray gun and feeding system, feeding system includes the powder jar, and powder jar discharge opening department is equipped with automatically controlled discharge device, and automatically controlled discharge device's discharge end and blender through connection. The blender both ends are connected with antithetical couplet accuse box and terminal intake pipe respectively, and terminal intake pipe and spray gun air inlet through connection. The inside board that turns over that is equipped with of antithetical couplet accuse box, turn over board one end and articulate with antithetical couplet accuse box inner wall through the pivot, the pivot all wears to establish to antithetical couplet accuse box outside. The pivot of turning over board one end is connected with the connecting rod, and the outside cover of connecting rod is equipped with the torsional spring, torsional spring both ends respectively with connecting rod and antithetical couplet accuse box fixed connection. The pivot of turning over the board other end is connected with the voltage regulator, voltage regulator and automatically controlled discharge device electric connection. The invention automatically adjusts the supply amount of the spraying material according to the air supply amount, so that the spraying material entering the combustion chamber can be fully melted.

Description

Automatic spraying device for metal surface coating

Technical Field

The invention belongs to the technical field of surface treatment of metal parts, and particularly relates to an automatic spraying device for a metal surface coating.

Background

Flame spraying means that a spraying material is melted by utilizing the high temperature of gas combustion flame, the spraying material comprises metal wires or powder, and the spraying material is sprayed on the surface of a workpiece by using compressed air flow to form a coating, and the flame spraying method belongs to the technical field of surface treatment of parts.

The flame spraying technology is a new surface protection and surface strengthening technology, which is rapidly developed in nearly 20 years and becomes a very active branch in the field of metal surface engineering. The flame is used as a heat source to heat metal and nonmetal materials to a molten state, fog flow is formed under the pushing of high-speed airflow and is sprayed on a workpiece, and when the sprayed tiny molten particles impact on the workpiece, plastic deformation is generated to form a sheet-shaped superposed deposition coating.

The flame spraying can spray carbon powder, tungsten carbide, ceramic powder, zinc and the like, and different spraying materials form different coatings to adapt to different working scenes.

The flame spraying equipment mainly comprises a gas supply unit, a feeding unit and a spray gun, wherein the gas supply unit supplies combustible gas and oxygen to a combustion chamber inside the spray gun, and the feeding unit supplies spraying materials to the inside of the combustion chamber of the spray gun. The combustible gas and the oxygen are combusted in the combustion chamber to melt the spraying material, and the melted spraying material is sprayed out from the nozzle along with heat flow and sprayed to the surface of the workpiece to form a coating.

In the existing flame spraying equipment, an air supply unit and a feeding unit are separately arranged and are not related, the air supply amount is controlled by a pressure regulating valve, and the feeding amount of the feeding unit is controlled by a feeding pump. When the air supply quantity changes, the supply quantity of the spraying material cannot be adjusted in time, so that the proportion of the spraying material and the air supply in the spray gun is not proper, and the spraying material in the combustion chamber cannot be completely melted.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the invention overcomes the defects of the prior art and provides the automatic spraying device for the metal surface coating.

The technical scheme adopted by the invention for solving the problems in the prior art is as follows:

metal surface coating automatic spraying device, including spray gun and feeding system, feeding system includes powder jar, and powder jar lower extreme discharge gate department is equipped with automatically controlled discharge device, and automatically controlled discharge device discharge end passes through unloading pipe and blender through connection.

The air inlet end of the mixer is connected with a joint control box through a pipeline in a through mode, the air outlet end of the mixer is connected with a terminal air inlet pipe through a through mode, and the terminal air inlet pipe is connected with an air inlet of a spray gun through a through mode.

The inside board that turns over that is equipped with of joint accuse box, turn over board one end and articulate through pivot and joint accuse box inner wall, the pivot of turning over board both sides all wears to establish to the joint accuse box outside.

The coaxial fixedly connected with connecting rod of pivot of turning over board one end, the outside cover of connecting rod is equipped with the torsional spring, the torsional spring both ends respectively with connecting rod and antithetical couplet accuse box fixed connection, under the torsion effect of torsional spring, turn over the board and will antithetical couplet accuse box stifled.

The pivot of turning over the board other end is connected with the voltage regulator, voltage regulator and automatically controlled discharge device electric connection.

Preferably, the mixer is arranged horizontally, the inlet and the outlet of the mixer are positioned at two ends of the axis of the mixer, a plurality of mixed flow plates which are arranged at intervals are arranged in the mixer, the mixed flow plates are obliquely arranged along the direction of the airflow, the mixed flow plates are arranged at intervals from top to bottom, and the height of the mixed flow plates is more than or equal to the radius of the mixer.

Preferably, the joint control box with the rectangular internal section is horizontally arranged, and the turning plate is vertically arranged to block the joint control box under the torsion action of the torsion spring.

The one side that turns over the board and deviate from the blender is equipped with the stopper, stopper and antithetical couplet accuse box inner wall fixed connection, and the stopper is located the relative one side of pivot, when turning over the board and arranging perpendicularly, turns over the terminal surface and the stopper butt that the board deviates from the blender.

Preferably, an inlet of the joint control box is connected with an electric control three-way valve through a middle pipe, an inlet of the electric control three-way valve is connected with an air inlet pipe in a penetrating manner, two outlets of the electric control three-way valve are respectively connected with a bypass pipe and the middle pipe in a penetrating manner, and the tail end of the bypass pipe is connected with a terminal air inlet pipe in a penetrating manner.

Preferably, the spray gun comprises a nozzle, a combustion chamber, a first diameter-changing area, a second diameter-changing area and a spray hole are sequentially communicated and connected with one another, the first diameter-changing area is waist-shaped, the second diameter-changing area is shuttle-shaped, and the spray hole is horn-shaped.

A first spiral air passage and a second spiral air passage are arranged in the inner wall of the nozzle, and the first spiral air passage and the second spiral air passage are wound outside the combustion chamber.

The outlet of the first spiral air passage and the outlet of the second spiral air passage are communicated with the combustion chamber, the inlet of the first spiral air passage and the outlet of the second spiral air passage are positioned outside the nozzle and are respectively connected with a first connecting air pipe and a second connecting air pipe, and the first connecting air pipe or the second connecting air pipe is communicated with the terminal air inlet pipe.

The end face of the nozzle is provided with a spark plug mounting hole communicated with the combustion chamber, and a spark plug is mounted in the spark plug mounting hole.

Preferably, a sliding plate is connected above the nozzle and is in sliding connection with a vertically arranged middle block, a rack is fixed above the middle block, the upper end of the rack penetrates through the upper platform, a clamping gear is rotatably connected to the upper platform, a driving gear and a first transmission gear are coaxially fixed to the clamping gear, and the clamping gear is in meshed connection with the rack.

The nozzle is provided with a base below, and the upper platform is fixedly connected with the base through a support.

The base is provided with a horizontally-arranged carrying gear in a rotating mode, the carrying gear is connected with a driving gear in a meshed mode, the driving gear is connected with a motor output shaft, and the motor is fixedly connected with the base.

An output shaft of the motor drives the first transmission gear to rotate through the linkage speed regulating device.

Preferably, the linkage speed adjusting device includes the casing, and the casing is inside to be equipped with the gear chamber, and gear chamber inside one side is equipped with the driven gear group, and the opposite side is equipped with speed governing gear group, and driven gear group and speed governing gear group all include a plurality of gear, and the corresponding gear intermeshing of driven gear group and speed governing gear group connects, and the gear ratio that every group meshing is connected is different.

All gears contained in the driven gear set are coaxially and fixedly connected, and the driven gear set is coaxially and fixedly connected with a second transmission gear.

All gears that speed governing gear train contained are swing joint each other, are equipped with the through-hole on the gear axis, and the concave joint spout that is equipped with in through-hole inner wall, and speed governing gear train coaxial insertion is equipped with the sleeve pipe, and the cover pipe periphery epirelief is equipped with the joint piece, and the height that highly is less than single gear joint spout of joint piece, joint piece slide to set up inside the joint spout.

The upper end of the sleeve penetrates through the outer portion of the shell, a vertical rod penetrates through the middle of the sleeve, the sleeve is connected with the vertical rod in a vertical sliding mode, and the vertical rod drives the sleeve to rotate.

The lower end of the vertical rod penetrates through the lower part of the shell and is fixedly connected with a first belt pulley.

The output shaft of the motor is connected with a second belt pulley, and a synchronous belt is sleeved between the first belt pulley and the second belt pulley.

The second transmission gear is arranged outside the shell and drives the first transmission gear to rotate through the intermediate connection gear set.

Preferably, the shell is provided with a plurality of inserting plate sliding grooves, the inserting plate sliding grooves are communicated with the gear cavity, and inserting plates are arranged inside the inserting plate sliding grooves in a sliding mode.

The spiles correspond to the gears contained in the speed regulating gear set one by one.

Preferably, the orifice exit is located on the carrier gear axis.

Preferably, the middle block is connected with two sliding plates in a sliding manner, the lower ends of the two sliding plates are connected with a connecting block in a rotating manner, and the connecting block is fixedly connected with one end of the nozzle, which faces away from the spray hole.

Compared with the prior art, the invention has the following beneficial effects:

(1) After the flame spraying operation is completed, the supply of coating material can be cut off and the spray gun cleaned.

(2) The solution passes through two continuous Laval tube structures before being sprayed out, and through the structure, the solution flow is accelerated, and the spraying effect is optimized.

(3) Combustible gas, oxygen and coating material flow into inside first spiral air flue and the second spiral air flue, preheat, make it can abundant burning inside the combustion chamber, improve combustion efficiency, also accelerate melting of coating material simultaneously.

(4) Through linkage speed adjusting device, can realize that the delivery gear rotates the time, drive the nozzle and reciprocate, realize the linkage between them, the column rule of spraying is the heliciform like this, and the spraying is more even.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the external form of a feed assembly of the automatic metal surface coating device of the present invention,

figure 2 is a view of the feeding assembly of the present invention without the support stand,

figure 3 is a cross-sectional view of a mixer of the feed assembly of the present invention,

FIG. 4 is a first external view of the feeding assembly joint control box of the present invention,

FIG. 5 is a second external view of the feed assembly gang control box of the present invention,

figure 6 is a transverse cross-sectional view of the feed assembly gang control box of the present invention,

figure 7 is a longitudinal cross-sectional view of a feed assembly gang control box of the present invention,

FIG. 8 is a view showing the external appearance of the coating assembly in the automatic coating apparatus for metal surface coating according to the present invention,

figure 9 is an external view of the spray gun in the spray assembly,

figure 10 is a rear view of figure 9,

figure 11 is a diagram of the effect of the figure 9 position after movement,

figure 12 is a horizontal cross-sectional view of the locking bolt of figure 9,

figure 13 is a cross-sectional view of a nozzle in the spray assembly,

figure 14 is a diagram of the shape of two helical air passages inside the nozzle,

figure 15 is an exploded view of the nozzle end,

figure 16 is an enlarged view of the upper portion of the spray end,

figure 17 is a bottom view of the linkage assembly in the spray assembly,

figure 18 is an exploded view of the linkage governor device,

figure 19 is a cross-sectional view of a speed gearset of the ganged speed device,

figure 20 is a cross-sectional view of the speed drive gear,

figure 21 is an exploded view of the speed gearset,

figure 22 is an exterior view of the workpiece placement unit in the spray assembly,

fig. 23 is a bottom view of the carrier gear.

In the figure: 1-powder tank, 101-electric control discharge device, 102-discharge pipe, 2-mixer, 201-mixed flow plate, 3-joint control box, 301-limit block, 4-turning plate, 401-rotating shaft, 402-connecting rod, 5-torsion spring, 6-protective sleeve, 7-pressure regulator, 8-electric control three-way valve, 801-air inlet pipe, 802-intermediate pipe, 9-bypass pipe, 10-terminal air inlet pipe and 11-support;

12-nozzle, 1201-combustion chamber, 1202-first variable diameter area, 1203-second variable diameter area, 1204-spray hole, 1205-first spiral air channel, 1206-second spiral air channel, 1207-first installation hole, 1208-spark plug installation hole, 1209-rear cover shell, 13-sliding plate, 1301-connecting block, 14-middle block, 1401-locking bolt, 15-rack, 16-guide rod, 17-clamping gear, 18-driving gear, 19-first transmission gear, 20-middle connecting gear set, 21-first belt pulley, 2101-vertical rod, 22-shell, 2201-left shell, 2202-right shell, 2203-gear cavity, 2204-plug board sliding groove, 23-passive gear set, 2301-second transmission gear, 24-gear set, 2401-clamping sliding groove, 25-sleeve, 2501-handle, 2502-clamping block, 26-clamping plate, 27-synchronous belt, 28-driving gear, 2801-second belt pulley, 29-motor, 30-speed regulating gear, 3001-conveying gear, 3002-conveying sliding table, 2502-handle, 26-connecting plate, 27-synchronous belt, 28-carrying ring, 28-driving gear, 29-second belt pulley, 29-motor table, 30-motor table, 3001-conveying belt, 3002-spark plug, 33-connecting platform, 35-connecting platform, and 35-connecting platform.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The description and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The automatic spraying device for metal surface coating of the present invention will be described in further detail with reference to the accompanying drawings, but the present invention is not limited thereto.

Metal surface coating automatic spraying device, including spray gun and feeding system, feeding system includes powder jar 1, and 1 lower extreme of powder jar is for leaking hopper-shaped, and the discharge gate is located the lowermost extreme that leaks hopper-shaped. The powder tank 1 stores a powdery coating material, inputs the coating material into the spray gun through the conveying unit, is externally connected with combustible gas and oxygen, and burns the combustible gas and the oxygen in a combustion chamber of the spray gun to melt the coating material in the combustion chamber, and then sprays the coating material through a spray hole to a workpiece to form a coating.

In order to realize the appropriate proportion of the combustible gas and the coating material, even the combustible gas, the oxygen and the coating material and ensure that the coating material in the combustion chamber can be melted, the linkage function of the gas supply amount and the coating material discharge amount is increased.

In this embodiment, a discharge port at the lower end of the powder tank 1 is provided with an electronic control discharge device 101, and a discharge end of the electronic control discharge device 101 is connected with the mixer 2 through a discharge pipe 102. The mixer 2 is arranged horizontally, the through connection between the blanking pipe 102 and the mixer 2 is arranged obliquely and close to the inlet end of the mixer 2, and the blanking direction of the coating material is along the air inlet direction inside the mixer 2, so that the air flow is prevented from entering the blanking pipe 102.

The air inlet end of the mixer 2 is connected with a joint control box 3 through a pipeline in a through mode, the air outlet end of the mixer is connected with a terminal air inlet pipe 10 through a through mode, and the terminal air inlet pipe 10 is connected with an air inlet of a spray gun in a through mode.

Powder tank 1, blender 2 and allies oneself with accuse box 3 all fixed mounting on support 11.

The inside board 4 that turns over that is equipped with of antithetical couplet accuse box 3, turn over 4 one ends of board and articulate through pivot 401 and antithetical couplet accuse box 3 inner wall, turn over pivot 401 of 4 both sides of board and all wear to establish to antithetical couplet accuse box 3 outsides.

The coaxial fixedly connected with connecting rod 402 of pivot 401 of turning over 4 one end, the outside cover of connecting rod 402 is equipped with torsional spring 5, 5 both ends of torsional spring respectively with connecting rod 402 and ally oneself with accuse box 3 fixed connection, under torsional spring 5's torsion effect, turn over 4 and will ally oneself with accuse box 3 stifled. In order to eliminate potential safety hazards and avoid risks such as spring flying after the torsion spring 5 is broken, a protective sleeve 6 is covered outside the torsion spring 5 and the connecting rod 402, and the protective sleeve 6 is fixedly connected with the outer wall of the joint control box 3.

The joint control box 3 with the rectangular inner section is horizontally arranged, and the turning plate 4 is vertically arranged to block the joint control box 3 under the torque force action of the torsion spring 5.

Turn over one side that board 4 deviates from blender 2 and be equipped with stopper 301, stopper 301 and 3 inner wall fixed connection of joint control box, stopper 301 are located the relative one side of pivot 401, when turning over board 4 and arranging perpendicularly, turn over the terminal surface and the stopper 301 butt that board 4 deviates from blender 2. The side of the limiting block 301 facing the inlet of the joint control box 3 is an inclined plane, so that the wind resistance is reduced.

The pivot 401 of turning over the board 4 other end is connected with voltage regulator 7, and voltage regulator 7 adopts prior art, installs on 3 outer walls of antithetical couplet accuse box, and voltage regulator 7's knob and the coaxial fixed connection of pivot 401.

The pressure regulator 7 is electrically connected with the electronic control discharging device 101, the electronic control discharging device 101 can adopt an electronic control valve or a metering pump, and the opening degree or the feeding amount of the electronic control discharging device 101 can be controlled by rotating a knob of the pressure regulator 7. Because the pipe diameter is unchangeable, therefore the inside inlet pressure of antithetical couplet accuse box 3 is big more, and the air input is more, and it is rotatory to admit air the promotion board 4 that turns over, and inlet pressure is big more, turns over the rotatory angle of board 4 big more, and the rotation angle of 7 knobs of voltage regulator is big more, and then increases row material volume through the automatically controlled discharge device 101 of voltage regulator 7 control. On the contrary, when the air inflow is reduced, the air pressure is reduced, the rotating angle of the turning plate 4 is reduced, and the electric control discharging device 101 reduces the discharging amount.

The air inlet meets the coating material inside the mixer 2, in order to increase the mixing effect of the air inlet and the coating material, the inlet and the outlet of the mixer 2 are positioned at two ends of the axis of the mixer, a plurality of flow mixing plates 201 which are arranged at intervals are arranged inside the mixer 2, the flow mixing plates 201 are obliquely arranged along the direction of the air flow, the flow mixing plates 201 are arranged at intervals up and down, and the height of the flow mixing plates 201 is more than or equal to the radius of the mixer 2. Thus, when the air flow flows in the mixer 2, the air flow moves in a snake shape under the guiding action of the flow mixing plate 201, and when passing through the flow mixing plate 201, the air flow throws the coating material.

After the flame spraying operation is finished, if the spray gun is not cleaned in time, when the temperature of the spray gun is reduced, some spraying materials which do not leave the spray gun and are melted can be solidified again, and some parts of the spray gun, such as spray holes, are blocked. In order to avoid the phenomenon, the inlet of the joint control box 3 is connected with an electric control three-way valve 8 through a middle pipe 802, the inlet of the electric control three-way valve 8 is connected with an air inlet pipe 801 in a penetrating way, two outlets of the electric control three-way valve 8 are respectively connected with a bypass pipe 9 and the middle pipe 802 in a penetrating way, and the tail end of the bypass pipe 9 is connected with a terminal air inlet pipe 10 in a penetrating way. The bypass pipe 9 is provided with a check valve. After the flame spraying operation is finished, the gas flow path is changed by regulating and controlling the electric control three-way valve 8, the gas flows into the spray gun through the bypass pipe 9, the mixer continues to burn in the combustion chamber, meanwhile, the flame is sprayed out through the spray gun, the coating material left in the spray gun is sprayed out, and the function of cleaning the spray gun is achieved. The inside of the air inlet pipe 8 can be only filled with combustible gas or oxygen, or can be directly filled with mixed gas of the combustible gas and the oxygen.

The spray gun is used as a core component in spraying equipment and comprises a nozzle 12, wherein a combustion chamber 1201, a first diameter changing area 1202, a second diameter changing area 1203 and a spray hole 1204 which are sequentially connected in a penetrating mode are arranged inside the nozzle 12, the first diameter changing area 1202 is in a waist shape, the second diameter changing area 1203 is in a shuttle shape, and the spray hole 1204 is in a horn shape. The through connection positions among the combustion chamber 1201, the first reducing area 1202, the second reducing area 1203 and the spray holes 1204 are in transition through arc-shaped curved surfaces to form two continuous Laval tube structures, and through the structure, the acceleration of solution flow is realized, and the spraying effect is optimized.

The inner wall of the nozzle 12 is provided with a first helical air duct 1205 and a second helical air duct 1206, and the first helical air duct 1205 and the second helical air duct 1206 are wound outside the combustion chamber 1201.

Outlets of the first spiral duct 1205 and the second spiral duct 1206 are communicated with the combustion chamber 1201, inlets of the first spiral duct 1205 and the second spiral duct 1206 are positioned outside the nozzle 12 and are respectively connected with a first connecting air pipe 34 and a second connecting air pipe 35, and the first connecting air pipe 34 or the second connecting air pipe 35 is communicated with the terminal air inlet pipe 10.

Combustible gas, oxygen and coating material flow into inside first spiral air flue 1205 and the second spiral air flue 1206, preheat, make it inside can the abundant burning in the combustion chamber, improve combustion efficiency, also accelerate melting of coating material simultaneously.

Meanwhile, through the diversion of the spiral air passage, the fluid generates the inertia of spiral movement, so that when the gas flows into the combustion chamber 1201 through the outlet, the gas moves spirally in the combustion chamber at the earlier stage according to the inertia and the guidance of the inner wall of the combustion chamber. Therefore, the outlets of the first spiral air duct 1205 and the second spiral air duct 1206 are oppositely arranged, the rotating directions of the first spiral air duct 1205 and the second spiral air duct 1206 are opposite, and therefore fluid ejected from the first spiral air duct 1205 and the second spiral air duct 1206 collides in a spiral flow manner inside the combustion chamber 1201, the mixing effect between the two is increased, and combustion is facilitated.

The end surface of the nozzle 12 is provided with a spark plug mounting hole 1208 communicating with the combustion chamber 1201, and the spark plug 36 is mounted in the spark plug mounting hole 1208. The spark plug mounting hole 1208 is externally covered with a rear cover 1209, and the rear end of the spark plug 36 is located inside the rear cover 1209.

A sliding plate 13 is connected above the nozzle 12, the sliding plate 13 is slidably connected with a vertically arranged middle block 14, and the relative height between the nozzle 12 and the middle block 14 can be changed by pushing and pulling the sliding plate 13. In this embodiment, the middle block 14 is provided therein with a slot having an open lower end and being vertically disposed, and the insertion plate 13 is inserted into the slot. Meanwhile, a locking bolt 1401 is connected to the lower portion of the side wall of the middle block 14 in a threaded mode, the tail end of the locking bolt 1401 penetrates through the slot and is abutted against the inserting plate 13, and after the locking bolt 1401 is screwed down, the sliding plate 13 can be fixed.

In order to adjust the orientation of the orifice 1204 in the nozzle 12, the workpiece is sprayed on an inclined surface. The middle block 14 is connected with two sliding plates 13 in a sliding mode, the lower ends of the two sliding plates 13 are connected with a connecting block 1301 in a rotating mode, a through hole is formed in the connecting block 1301, one end, back to the jet hole 1204, of the nozzle 12 is provided with a first mounting hole 1207, the first mounting hole 1207 is a threaded hole, and the connecting block 1301 and the nozzle 12 are fixedly connected through bolts.

A vertically arranged rack 15 is fixed above the middle block 14, the upper end of the rack 15 penetrates through an upper platform 33, a clamping gear 17 is rotatably connected to the upper platform 33, a driving gear 18 and a first transmission gear 19 are coaxially fixed on the clamping gear 17, and the clamping gear 17 is meshed with the rack 15.

The clamping gear 17 rotates to drive the rack 15 to move up and down, and further drive the nozzle 12 to move up and down through the middle block 14. In order to improve the reliability of the operation, the rack 15 is double-sided, that is, two opposite surfaces are provided with teeth, two sides of the rack 15 are respectively provided with a clamping gear 17, and only one of the two clamping gears 17 is fixedly connected with a first transmission gear 19. The drive gears 18 fixed to the two gripper gears 17 are in meshing engagement with each other, which ensures that the two gripper gears 17 rotate in opposite directions in synchronism.

In order to play a role of guiding, a vertically arranged guide rod 16 is fixed on the top of the middle block 14, the guide rod 16 penetrates through the upper platform 33, and a limiting plate is arranged on the top of the guide rod 16 and prevents the guide rod 16 from being separated from the upper platform 33. A base 32 is arranged below the nozzle 12, and an upper platform 33 is fixedly connected with the base 32 through a bracket.

The base 32 is rotatably provided with a horizontally arranged carrying gear 30, the carrying gear 30 is engaged and connected with a driving gear 28, the driving gear 28 is connected with an output shaft of a motor 29, and the motor 29 is fixedly connected with the base 32. The orifice 1204 exit is located on the carrier gear 30 axis.

The top of the carrying gear 30 is provided with a carrying platform 3001, the top surface of the carrying platform 3001 is provided with a plurality of mounting holes for fixing a workpiece, the bottom of the carrying gear 30 is coaxially fixed with a convex shaft 3002, and the convex shaft 3002 is inserted into the base 32. The round axial surface of the carrying gear 30 is provided with a plurality of press rings 31, each press ring 31 comprises a horizontal surface and a vertical surface, the horizontal surface is pressed on the carrying gear 30, and the vertical surfaces are fixedly connected with the base 32. The pressure ring 31 carries the rotational connection between the gears 30.

An output shaft of the motor 29 drives the first transmission gear 19 to rotate through a linkage speed regulating device. Through linkage speed adjusting device, can realize that carrying gear 30 rotates, drive nozzle 12 and reciprocate, realize the linkage between them, the column line of spraying is the heliciform like this, and the spraying is more even.

The linkage speed regulation device comprises a shell 22, a gear cavity 2203 is formed in the shell 22, a driven gear set 23 is arranged on one side in the gear cavity 2203, a speed regulation gear set 24 is arranged on the other side, the driven gear set 23 and the speed regulation gear set 24 both comprise a plurality of gears, the gears corresponding to the driven gear set 23 and the speed regulation gear set 24 are meshed and connected, and the gear ratio of each group of meshed and connected gears is different.

In order to facilitate the installation of the driven gear set 23 and the speed regulating gear set 24, the housing 22 is divided into two parts, and comprises a left housing 2201 and a right housing 2202, and the two housings are fixedly connected through bolts.

All gears contained in the driven gear set 23 are coaxially and fixedly connected, a second transmission gear 2301 is coaxially and fixedly connected to the driven gear set 23, and the second transmission gear 2301 penetrates through the shell 22.

All gears that speed governing gear set 24 contained are coaxial each other, swing joint, are equipped with the through-hole on the gear axis, and the concave joint spout 2401 that is equipped with in through-hole inner wall, and speed governing gear set 24 coaxial is inserted and is equipped with sleeve pipe 25, and the sleeve pipe 25 periphery epirelief is equipped with joint piece 2502, and joint piece 2502 highly is less than the height of single gear joint spout 2401, and joint piece 2501 slides and sets up inside joint spout 2401.

The upper end of the sleeve 25 penetrates through the shell 22, a vertical rod 2101 penetrates through the middle of the sleeve 25, the sleeve 25 is connected with the vertical rod 2101 in a vertically sliding mode, and the vertical rod 2101 drives the sleeve 25 to rotate.

The cross-sectional shape of the vertical rod 2101 may be polygonal or spline-shaped, and the inner structure of the sleeve 25 is the same as the cross-sectional shape of the vertical rod 2101, so that both can slide only up and down.

The clamping block 2501 slides into the clamping sliding groove 2401 of the gear in the corresponding speed regulating gear set 24 through the upward moving sleeve 25, and the corresponding gear is driven to rotate. In order to move the sleeve 25 upwards conveniently, the handle 2501 is arranged at the top of the sleeve 25, and meanwhile, in order to prevent the sleeve 25 from moving in the transmission process, anti-slip rubber is wrapped outside the clamping block 2501, so that the friction force of the clamping block is improved.

When the engaging block 2501 is moved, there is a possibility that the engaging slide grooves 2401 of the upper and lower gears are misaligned, and it is necessary to rotate the sleeve 25 to make the two gears face each other.

The lower end of the vertical rod 2101 penetrates below the housing 22 and is fixedly connected with the first belt pulley 21, the output shaft of the motor 29 is connected with the second belt pulley 2801, and a synchronous belt 27 is sleeved between the first belt pulley 21 and the second belt pulley 2801.

The second transmission gear 2301 is disposed outside the housing 22, and the second transmission gear 2301 drives the first transmission gear 19 to rotate through the intermediate connection gear set 20.

The first transmission gear 19 and the second transmission gear 2301 both adopt conical gears, the intermediate connection gear set 20 comprises an intermediate rotating rod and conical gears at two ends of the rotating rod, and the conical gears at the two ends are respectively meshed with the first transmission gear 19 and the second transmission gear 2301.

A plurality of inserting plate sliding grooves 2204 are formed in the shell 22, the inserting plate sliding grooves 2204 are communicated with the gear cavities 2203, inserting plates 26 are slidably arranged in the inserting plate sliding grooves 2204, and the inserting plates 26 correspond to gears contained in the speed regulating gear set 24 one by one. An emergency stop can be achieved by means of the plug board 26.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. Metal surface coating automatic spraying device, including spray gun and feeding system, feeding system includes powder jar (1), its characterized in that:

an electric control discharge device (101) is arranged at a discharge port at the lower end of the powder tank (1), the discharge end of the electric control discharge device (101) is communicated with the mixer (2) through a discharge pipe (102),

the air inlet end of the mixer (2) is connected with a joint control box (3) through a pipeline in a run-through way, the air outlet end is connected with a terminal air inlet pipe (10) through a run-through way, the terminal air inlet pipe (10) is connected with the air inlet of the spray gun through a run-through way,

a turning plate (4) is arranged in the joint control box (3), one end of the turning plate (4) is hinged with the inner wall of the joint control box (3) through a rotating shaft (401), the rotating shafts (401) at two sides of the turning plate (4) are all arranged outside the joint control box (3) in a penetrating way,

a connecting rod (402) is coaxially and fixedly connected with a rotating shaft (401) at one end of the turning plate (4), a torsion spring (5) is sleeved outside the connecting rod (402), two ends of the torsion spring (5) are respectively and fixedly connected with the connecting rod (402) and the joint control box (3), the turning plate (4) blocks the joint control box (3) under the torsion action of the torsion spring (5),

a rotating shaft (401) at the other end of the turning plate (4) is connected with a voltage regulator (7), and the voltage regulator (7) is electrically connected with the electric control discharging device (101).

2. The automatic metal surface coating spraying device of claim 1, wherein:

mixer (2) level is arranged, and the exit of mixer (2) is located the both ends of its axis, and mixer (2) inside is equipped with mixed flow plate (201) of a plurality of interval arrangement, and mixed flow plate (201) are arranged along the direction slope of air current, and interval arrangement about mixed flow plate (201), and the radius of the height more than or equal to mixer (2) of mixed flow plate (201).

3. The automatic metal surface coating spraying device of claim 2, wherein:

the joint control box (3) with the rectangular inner section is horizontally arranged, the turning plate (4) is vertically arranged to block the joint control box (3) under the action of the torsion force of the torsion spring (5),

turn over one side that board (4) deviates from blender (2) and be equipped with stopper (301), stopper (301) and antithetical couplet accuse box (3) inner wall fixed connection, stopper (301) are located one side that pivot (401) are relative, when turning over board (4) and arranging perpendicularly, turn over terminal surface and stopper (301) butt that board (4) deviate from blender (2).

4. The automatic metal surface coating spraying device of claim 3, wherein:

the inlet of the joint control box (3) is connected with an electric control three-way valve (8) through a middle pipe (802), the inlet of the electric control three-way valve (8) is communicated with an air inlet pipe (801),

an inlet of the electric control three-way valve (8) is connected with an air inlet pipe (801) in a penetrating mode, two outlets of the electric control three-way valve (8) are respectively connected with a bypass pipe (9) and an intermediate pipe (802) in a penetrating mode, and the tail end of the bypass pipe (9) is connected with a terminal air inlet pipe (10) in a penetrating mode.

5. The automatic metal surface coating spraying device of claim 4, wherein:

the spray gun comprises a nozzle (12), a combustion chamber (1201), a first diameter-changing area (1202), a second diameter-changing area (1203) and spray holes (1204) which are sequentially communicated are arranged in the nozzle (12), the first diameter-changing area (1202) is waist-shaped, the second diameter-changing area (1203) is fusiform, the spray holes (1204) are trumpet-shaped,

a first spiral air duct (1205) and a second spiral air duct (1206) are arranged in the inner wall of the nozzle (12), the first spiral air duct (1205) and the second spiral air duct (1206) are wound outside the combustion chamber (1201),

outlets of the first spiral air passage (1205) and the second spiral air passage (1206) are communicated with the combustion chamber (1201), inlets of the first spiral air passage and the second spiral air passage are positioned outside the nozzle (12) and are respectively connected with a first connecting air pipe (34) and a second connecting air pipe (35), the first connecting air pipe (34) or the second connecting air pipe (35) is communicated with the terminal air inlet pipe (10),

the end face of the nozzle (12) is provided with a spark plug mounting hole (1208) communicated with the combustion chamber (1201), and a spark plug (36) is mounted in the spark plug mounting hole (1208).

6. The automatic metal surface coating spraying device of claim 5, wherein:

a sliding plate (13) is connected above the nozzle (12), the sliding plate (13) is in sliding connection with a vertically arranged middle block (14), a rack (15) is fixed above the middle block (14), the upper end of the rack (15) penetrates through an upper platform (33), a clamping gear (17) is rotatably connected onto the upper platform (33), a driving gear (18) and a first transmission gear (19) are coaxially fixed on the clamping gear (17), the clamping gear (17) is in meshing connection with the rack (15),

a base (32) is arranged below the nozzle (12), an upper platform (33) is fixedly connected with the base (32) through a bracket,

the base (32) is rotatably provided with a horizontally arranged carrying gear (30), the carrying gear (30) is engaged and connected with a driving gear (28), the driving gear (28) is connected with an output shaft of a motor (29), the motor (29) is fixedly connected with the base (32),

an output shaft of the motor (29) drives the first transmission gear (19) to rotate through the linkage speed regulating device.

7. The automatic metal surface coating spraying device of claim 6, wherein:

the linkage speed regulating device comprises a shell (22), a gear cavity (2203) is arranged in the shell (22), one side in the gear cavity (2203) is provided with a driven gear set (23), the other side is provided with a speed regulating gear set (24), the driven gear set (23) and the speed regulating gear set (24) both comprise a plurality of gears, the corresponding gears of the driven gear set (23) and the speed regulating gear set (24) are meshed and connected with each other, the gear ratio of each group of meshed and connected gears is different,

all gears contained in the driven gear set (23) are coaxially and fixedly connected, the driven gear set (23) is coaxially and fixedly connected with a second transmission gear (2301),

all gears contained in the speed regulating gear set (24) are movably connected with each other, a through hole is arranged on a gear axis, a clamping sliding groove (2401) is concavely arranged in the inner wall of the through hole, a sleeve (25) is coaxially inserted into the speed regulating gear set (24), a clamping block (2502) is convexly arranged on the circumferential surface of the sleeve (25), the height of the clamping block (2502) is smaller than that of the single gear clamping sliding groove (2401), the clamping block (2501) is slidably arranged in the clamping sliding groove (2401),

the upper end of the sleeve (25) penetrates through the shell (22), a vertical rod (2101) penetrates through the middle of the sleeve (25), the sleeve (25) is connected with the vertical rod (2101) in a vertical sliding manner, the vertical rod (2101) drives the sleeve (25) to rotate,

the lower end of the vertical rod (2101) is arranged below the shell (22) in a penetrating way and is fixedly connected with a first belt pulley (21),

a second belt pulley (2801) is connected on the output shaft of the motor (29), a synchronous belt (27) is sleeved between the first belt pulley (21) and the second belt pulley (2801),

second drive gear (2301) sets up in casing (22) outside, and second drive gear (2301) drives first drive gear (19) rotation through intermediate junction gear train (20).

8. The automatic spraying device for metal surface coatings according to claim 7, characterized in that:

a plurality of inserting plate sliding grooves (2204) are arranged on the shell (22), the inserting plate sliding grooves (2204) are communicated with the gear cavity (2203), inserting plates (26) are arranged in the inserting plate sliding grooves (2204) in a sliding manner,

the inserting plates (26) correspond to the gears contained in the speed regulating gear set (24) one by one.

9. The automatic metal surface coating spraying device of claim 8, wherein:

the orifice (1204) outlet is located on the carrier gear (30) axis.

10. The automatic metal surface coating spraying device of claim 9, wherein:

the middle block (14) is connected with two sliding plates (13) in a sliding mode, the lower ends of the two sliding plates (13) are connected with a connecting block (1301) in a rotating mode, and the connecting block (1301) is fixedly connected with one end, back to the jet hole (1204), of the nozzle (12).

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