CN115646678B

CN115646678B - Powder spraying device

Info

Publication number: CN115646678B
Application number: CN202211569088.XA
Authority: CN
Inventors: 董京勇
Original assignee: Shandong Yian Aluminum Co ltd
Current assignee: Shandong Yian Aluminum Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-05-16
Anticipated expiration: 2042-12-08
Also published as: CN115646678A

Abstract

The invention discloses a powder spraying device which comprises a storage barrel, a material pipe rotationally arranged on the axial middle line of the storage barrel, a dispersing assembly and a dispersing assembly, wherein gas is utilized to flow through the material pipe body to absorb powder coating in the storage barrel to be sprayed out of a spray gun during operation, the dispersing assembly comprises an annular partition plate arranged in the storage barrel, a plurality of circular arc-shaped elastic pieces are arranged between the material pipe and the partition plate in parallel in the circumferential direction, a plurality of pulling pieces are arranged between the inner side wall of the storage barrel and the partition plate in the circumferential direction, the elastic pieces are in one-to-one correspondence with the pulling pieces, and the elastic pieces are intermittently straightened by the pulling pieces based on the rotating force of the material pipe.

Description

Powder spraying device

Technical Field

The invention relates to the technical field related to powder spraying processing, in particular to a powder spraying device.

Background

Powder spraying is known to spray powder coating onto the surface of a workpiece by using powder spraying equipment, wherein powder can be uniformly adsorbed on the surface of the workpiece under the action of static electricity to form a powdery coating, and the powdery coating is baked, leveled and solidified at high temperature to form a final coating with different effects (different types of effects of the powder coating).

When powder is sprayed, sprayed powder stored in the storage barrel is easy to agglomerate under the environmental influences of pressure, temperature, humidity and the like, so that the spraying equipment is influenced to smoothly spray the powder, and therefore, the powder in the storage barrel is required to be continuously stirred, the blocks are scattered, and meanwhile, the powder agglomeration is prevented; the patent of the invention is issued as CN108067369B, and the publication day is 10/02/2020, and discloses a powder coating treatment device for electrostatic spraying equipment, wherein the electrostatic spraying equipment comprises a machine body, the powder coating treatment device comprises a storage vat fixedly arranged on the machine body, a bottom plate is fixedly arranged in the storage vat and close to the bottom position, the bottom plate is fixedly arranged at the bottom of the storage vat through a plurality of connecting springs, a sieve plate surrounding the bottom plate is arranged at the edge position of the bottom plate, a plurality of sieve holes for penetrating powder coating are formed in the sieve plate, and a vibrator is fixedly arranged at the bottom of the bottom plate; the powder coating treatment device can effectively decompose the coagulated particles in the powder coating, avoid the waste of materials, ensure that the coating smoothly enters the electrostatic spray gun to ensure the electrostatic spraying work

Is carried out smoothly.

The disadvantage of the above technique is that the amount of powder paint added in the storage tank is relatively large during operation, and only the powder paint in the form of a block close to the screen plate is decomposed by simple vibration, and the powder paint in the form of a block of other parts is relatively small in force due to the powder paint in the form of a block of other parts, so that the powder paint in the form of a block of parts is not easy to decompose along with the powder paint in the form of a block close to the screen plate.

Disclosure of Invention

The invention aims to provide a powder spraying device which solves the technical problems in the related art.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a powder spraying device, includes the storage vat to and rotate the material pipe of locating on the storage vat axial middle line, utilize the gas flow to pass through during operation the material pipe body absorbs powder coating in the storage vat is from the spray gun blowout, still includes:

the dispersing assembly comprises an annular partition plate arranged in the storage barrel, a plurality of circular arc-shaped elastic pieces are arranged in parallel in the circumferential direction between the material pipe and the partition plate, a plurality of pulling pieces are arranged in the circumferential direction between the inner side wall of the storage barrel and the partition plate, the elastic pieces are in one-to-one correspondence with the pulling pieces, and the pulling pieces are based on the rotating force of the material pipe to intermittently straighten the elastic pieces.

Above-mentioned, the material pipe runs through the storage vat, a plurality of material absorbing openings have been seted up side by side in the circumference of material pipe, a plurality of shell fragment with a plurality of material absorbing openings one-to-one, just the material absorbing opening is close to the bottom in the storage vat, every material absorbing opening on the material pipe is gone up and is all installed the sieve that an slope set up, the lower extreme of sieve with the laminating of bottom slip in the storage vat, the high end of sieve pass through elastic cloth with the shell fragment is connected.

The inner bottom of the storage barrel is of an inverted cone frustum structure.

The flow direction of the gas in the material pipe is from the bottom of the storage barrel to the barrel opening, and the radial dimension of the inner structure of the material pipe is gradually reduced from the gas inlet to the part of the material suction opening away from the gas inlet.

The drying mechanism for removing the water in the powder coating is arranged on the part of the material pipe from the material suction opening to the air outlet from the air inlet.

Above-mentioned, the material pipe with be provided with annular connecting plate in the circumference between the baffle, the connecting plate orientation the surface mounting of storage vat inner bottom has the otter board, the shell fragment spring up powder coating striking otter board.

Above-mentioned, the mesh on the otter board is three-dimensional irregularly shaped structure and arranges.

The pull piece comprises a pull rod which is connected with the partition plate in a sliding way along the radial direction of the material pipe, a first chute is arranged on the inner side wall of the material storage barrel, one end of the pull rod is connected with the first chute in a sliding way, and the other end of the pull rod is fixedly connected with the elastic sheet;

along the direction of rotation of material pipe, first spout comprises a plurality of sections L type grooves and a plurality of sections circular arc shape groove alternate connection each other, the short section of L type groove is close to the baffle, the circular arc shape groove be close to the one end of baffle is connected with the preceding short section of L type groove, the other end and the later one of circular arc shape groove the long section of L type groove is kept away from the one end of baffle is connected.

The arc-shaped groove is close to the inner side wall of the baffle plate, a plurality of protruding blocks are arranged in parallel along the track direction of the arc-shaped groove, and second sliding grooves are formed in the positions, corresponding to the two ends of the length direction of the screen plate, of the material pipe and the baffle plate;

when one end of the pull rod slides in the circular arc groove, the sieve plate reciprocates in the second chute.

Above-mentioned, the outer wall circumference of storage vat is equipped with a plurality of storage tanks side by side, during operation, can be through the storage tank at any time to add powder coating in the storage vat.

The invention has the beneficial effects that: firstly, through setting up convex shell fragment, in the material pipe drive its synchronous rotation stroke, the shell fragment can play the effect of transversely stirring and scattering to the powder coating in the storage vat.

Secondly, through setting up the piece that draws, can make to draw the piece intermittent type with the shell fragment straightening under the drive of material pipe, so the shell fragment can be between straightening and arch back and forth change, then the shell fragment is when the arch structure changes from straightening, can produce vertical bullet top to the powder coating and break up the effect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

Fig. 1 is a schematic perspective view of a powder spraying device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the overall cross-sectional structure of a powder spraying device according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a pull member of a powder spraying apparatus according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of another pull member structure of a powder spraying apparatus according to an embodiment of the present invention.

Reference numerals illustrate:

1. a storage barrel; 2. a material pipe; 20. a material suction port; 3. a dispersion assembly; 30. a partition plate; 31. a spring plate; 32. a pull member; 320. a pull rod; 321. a first chute; 322. an L-shaped groove; 323. a circular arc-shaped groove; 324. a gear ring; 325. a rack; 326. a gear; 33. a sieve plate; 34. an elastic cloth; 35. a connecting plate; 36. a screen plate; 37. a bump; 38. a second chute; 4. a storage tank; 5. a material adding mechanism; 50. an opening plate; 51. a slide bar; 52. a first block; 53. a connecting rod; 54. a material conveying port; 55. a second block; 56. a first limiting step; 57. a second limiting step; 58. a cone.

Detailed Description

In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, the powder spraying device provided by the embodiment of the invention comprises a storage barrel 1 and a material pipe 2 rotatably arranged on the axial middle line of the storage barrel 1, wherein during operation, powder coating in the storage barrel 1 is sucked through the material pipe 2 by utilizing gas flow and conveyed to a spray gun to be sprayed out of the spray gun, during operation of powder spraying equipment, when compressed air is sprayed from a spray gun nozzle at a high speed, negative pressure is generated at a position connected with the material pipe 2, the powder coating is carried out of the storage barrel 1, mixed air is sprayed out from a spray gun nozzle at a high speed, static is given to the powder coating by a high-voltage electric field when the powder coating passes through the spray gun, then the powder coating is combined with the surface of a sprayed workpiece under the action of static to form a powdery coating, and the powdery coating is baked, leveled and solidified at a high temperature to form a final coating with different effects, and the powder coating device further comprises:

the dispersing component 3 comprises an annular baffle plate 30 arranged in the storage vat 1, the baffle plate 30 is rotationally connected with the bottom in the storage vat 1, a plurality of circular arc-shaped elastic pieces 31 are arranged between the material pipe 2 and the baffle plate 30 in parallel in the circumferential direction, a plurality of pulling pieces 32 are arranged between the inner side wall of the storage vat 1 and the baffle plate 30 in the circumferential direction, the plurality of elastic pieces 31 are in one-to-one correspondence with the plurality of pulling pieces 32, the plurality of pulling pieces 32 intermittently straighten the plurality of elastic pieces 31 based on the rotating force of the material pipe 2.

Specifically, during operation, a proper amount of powder coating is added in the part between the material pipe 2 and the partition board 30, then the driving piece drives the material pipe 2 to rotate, the elastic piece 31 is driven to rotate in the synchronous circumferential direction in the rotation process of the material pipe 2, the elastic piece 31 can play a role in stirring and scattering the powder coating, at the moment, the role of the elastic piece 31 is similar to that of a stirring blade, the stirred and scattered powder coating can be sucked away from the storage vat 1 under the driving of air flow, the rotation of the material pipe 2 drives the partition board 30 to rotate in the synchronous direction through the connecting rod, and the pulling piece 32 performs intermittent straightening action on the elastic piece 31 which moves in the circumferential direction based on the power.

The embodiment of the present invention may provide the pull member 32 in the following first configuration:

the annular gear ring 324 is arranged on the inner side wall of the storage bucket 1, the teeth on the annular gear ring 324 are divided into a plurality of groups and are arranged at intervals, then the racks 325 are arranged on the partition plate 30 along the radial direction of the material pipe 2, the gears 326 are further arranged on the partition plate 30, the racks 325 are meshed with the teeth on the annular gear ring 324 and are arranged together, the gears 326 and the teeth on the annular gear ring 324 can be meshed, so that the partition plate 30 drives the racks 325 and the gears 326 to synchronously rotate in the rotating process, the gears 326 intermittently mesh with each group of teeth on the annular gear ring 324, the gears 326 rotate in the meshing process, the racks 325 are driven to gradually move away from the material pipe 2, one end of the racks 325 is connected with the elastic sheet 31, the movement of the racks 325 gradually straightens the elastic sheet 31, the elastic force of the elastic sheet 31 gradually increases, and when the gears 326 are positioned between the two groups of teeth, the gears 326 are not limited by the teeth, the elastic sheet 31 can instantaneously pull the racks to reset, so that the elastic sheet 31 can play a role of bouncing and scattering the powder coating in the process that the elastic sheet 31 is pulled from the straightened state to the state, and the powder coating can stir the powder coating from the high to the low level of the whole storage bucket (see figure 1).

The pull member 32 of the present embodiment may also be provided in a second configuration as follows: the pull piece 32 comprises a pull rod 320 which is radially and slidably connected with the baffle plate 30 along the material pipe 2, a first chute 321 is arranged on the inner side wall of the material storage barrel 1, one end of the pull rod 320 is slidably connected with the first chute 321, the other end of the pull rod 320 is fixedly connected with the elastic sheet 31, the first chute 321 is formed by alternately connecting a plurality of sections of L-shaped grooves 322 and a plurality of sections of circular arc-shaped grooves 323 along the rotation direction of the material pipe 2, the short sections of the L-shaped grooves 322 are close to the baffle plate 30, one end of the circular arc-shaped grooves 323 close to the baffle plate 30 is connected with the short section of the former L-shaped groove 322, the other end of the circular arc-shaped grooves 323 is connected with one end of the latter long section of the L-shaped grooves 322 far away from the baffle plate 30, when the baffle plate 30 rotates, the pull rod 320 is driven to slide in the first chute 321, the pull rod 320 gradually moves away from the partition plate 30 from the circular arc-shaped groove 323 to the L-shaped groove 322, namely, at the moment, one end of the pull rod 320 in the first groove gradually moves away from the partition plate 30, so that the pull rod 320 gradually moves towards the partition plate 30, the elastic plate 31 plays a role in ejecting powder paint in the process of straightening the plate from the circular arc-shaped structure, the powder paint in the storage bucket 1 can be completely stirred, when the pull rod 320 reaches the junction of the circular arc-shaped groove 323 and the L-shaped groove 322 to a point, namely, when the pull rod 320 is positioned at the position of the long section of the L-shaped groove 322 farthest from the partition plate 30, the limit of the inner side wall of the first groove is lost, and under the action of the resilience force of the elastic plate 31, the elastic plate 31 plays a role in ejecting powder paint, and has an instant accelerating effect due to the extremely high resetting speed, so that the scattering effect is excellent (see fig. 4).

Of course, the structure of the pull member 32 in the embodiment of the present invention is not limited to the above two types, and the pull member 32 structure capable of realizing the above-mentioned structure change of the elastic sheet 31 can be used, so that the decomposition effect of the elastic sheet 31 structure change process on the powder coating is difficult to realize by other powder coating stirring mechanisms in the prior art, and the structure of the second pull member 32 is also preferably used in the embodiment of the present invention, which is simpler and lower in cost compared with the first type.

The embodiment of the invention has the beneficial effects that: firstly, through setting up convex shell fragment 31, in material pipe 2 drive its synchronous rotation stroke, shell fragment 31 can play the effect that horizontal stirring was broken up to the powder coating in the storage vat 1.

Secondly, through setting up the pulling piece 32, can make the pulling piece 32 intermittent type with shell fragment 31 flare-out under the drive of material pipe 2, so shell fragment 31 can make a round trip to change between flare-out and arch, then shell fragment 31 is when the structure changes from flare-out to arch, can produce vertical bullet top and break up the effect to powder coating.

Further, the material pipe 2 penetrates through the material storage barrel 1, a plurality of material sucking openings 20 are arranged in parallel in the circumferential direction of the material pipe 2, a plurality of elastic plates 31 are in one-to-one correspondence with the plurality of material sucking openings 20, and the material sucking openings 20 are close to the inner bottom of the material storage barrel 1, so that preferably, the flow direction of gas in the material pipe 2 is from the bottom of the material storage barrel 1 to the barrel opening direction, the radial dimension of the inner structure of the material pipe 2 is gradually reduced from the air inlet to the part of the material sucking openings 20 away from the air inlet, a sieve plate 33 which is obliquely arranged is arranged on each material sucking opening 20 on the material pipe 2, the lower end of the sieve plate 33 is in sliding fit with the inner bottom of the material storage barrel 1, and the upper end of the sieve plate 33 is connected with the elastic plates 31 through elastic cloth 34 (the elastic plates 31 are in a motion change process from straightening to arching, and the elastic cloth 34 can be adapted to change, so that gaps between the elastic plates 31 and 33 are avoided, and the powder coating in a part of the sieve plate is difficult to be broken.

Specifically, in the rotation process of the material pipe 2, the obliquely arranged sieve plate 33 can scoop up the powder coating at the inner bottom of the material storage barrel 1, so that the powder coating can separate finer particles from caking through the sieve plate 33, as the sieve plate 33 is arranged at the material suction opening 20, the powder coating falling from the sieve holes after being screened by the sieve plate 33 is closer to the material suction opening 20, the powder coating can be preferentially taken away by airflow than the powder coating at other positions, the sieve plate 33 can prevent some powder coating with caking from being mixed into the screened powder coating to a certain extent, the caking can fly from the elastic sheet 31 to form oblique throwing action, the caking coating which is thrown up and falls down can impact with other powder coating, a certain crushing effect can be achieved, and in addition, the crushing action can be carried out on the caking powder coating in the process of the elastic sheet 31 in an instant arching, so that the decomposition efficiency of the block powder coating can be improved.

When the air flows from one end of the material pipe 2 near the bottom of the material storage barrel 1 to the other end, negative pressure is generated at the material suction opening 20 by the air flow, so that the powder coating screened by the screen plate 33 can be taken away by the air flow, so that the lump-shaped powder coating can be taken away together, the part of the material pipe 2 from the air inlet to the material suction opening 20 far away from the air inlet is reduced in radial dimension, the air flow is thinned gradually, the flow speed of the air flow is accelerated when the air flow passes through the material pipe, the negative pressure generated at the material suction opening 20 is stronger, the powder coating is easier to take away, and in the embodiment of the invention, the inner bottom of the material storage barrel 1 is in an inverted conical platform structure, so that the powder coating contacted with the screen plate 33 can be moved circumferentially under the pushing of the screen plate 33 in the circumferential movement of the screen plate 33, centrifugal effect can be generated, the centrifugal force is related to the mass of the object, therefore, the agglomerated powder coating can be kept away from the material pipe 2, and the powder coating with small particles also has centrifugal trend, but the powder coating can be taken away from the material pipe 2, the air flow is required to be taken away by the air flow, the inner bottom of the material suction opening 20 is more easily to be taken away, and the situation of the material storage barrel can be prevented from slipping down towards the bottom of the material suction opening 20.

The spraying powder stored in the storage bucket 1 is easy to agglomerate under the environmental influence of pressure, temperature, humidity and the like, while the pressure and temperature of a spraying workshop are basically unchanged, and the humidity in the powder coating is an important reason for agglomeration of the powder coating, even if the decomposed powder coating is scattered, the agglomeration possibility still exists, so that a drying mechanism (which is not shown in the drawings and is not described in detail in the prior art) for removing the moisture in the powder coating is preferably arranged on the part of the material pipe 2 from the position of the material suction opening 20 away from the air inlet to the air outlet, and the drying mechanism is used for drying the powder coating flowing along with the airflow to remove the redundant moisture, so that the agglomeration is avoided again when the powder coating flows to the nozzle, and the condition of affecting the spraying operation is avoided.

Further, an annular connecting plate 35 is arranged in the circumferential direction between the material pipe 2 and the partition plate 30, the partition plate 30 is fixedly connected with the outer edge of the connecting plate 35, the material pipe 2 is fixedly connected with the inner edge of the connecting plate 35, a net plate 36 is arranged on the surface of the connecting plate 35 facing the inner bottom of the storage vat 1, the elastic sheet 31 ejects powder coating to strike the net plate 36, in particular, when the blocky powder coating is ejected, due to the action of elastic force from the elastic sheet 31, a certain breaking effect is already achieved, but still small blocky blocks which are not completely dispersed still exist, so that the continuous upward movement of the blocky powder coating can be prevented when the blocky powder coating is ejected, thus, the bulk powder coating impacts the screen plate 36 and is crushed and decomposed again, and in the embodiment of the invention, the mesh holes on the screen plate 36 are arranged in a three-dimensional irregular structure, which is equivalent to the staggered superposition of the multi-layer sheet-shaped screen plates 36, so that the bulk powder coating is crushed once when impacting the first layer of screen plate 36, the bulk powder coating existing after the primary crushing contacts the second layer of screen plate 36 to generate secondary crushing, the bulk powder coating existing after the secondary crushing contacts the third layer of screen plate 36 to generate tertiary crushing, and the size of the bulk powder coating subjected to the multiple crushing is gradually reduced.

The distance between the net plate 36 and the spring plate 31 is configured to be a suitable distance for realizing multiple crushing of the bulk powder coating, if the spring plate 31 can spring up the bulk powder coating to a height of 10cm, the net plate 36 is configured at a position where the powder coating flies up to a height of 5cm, so that the bulk powder coating has enough lifting force for multiple crushing.

Further, the circular arc groove 323 is close to the inner side wall of the separator 30, and is provided with a plurality of bumps 37 in parallel along the track direction, and the positions of the material pipe 2 and the separator 30 corresponding to the two ends of the sieve plate 33 in the length direction are provided with second sliding grooves 38;

when one end of the pull rod 320 slides in the circular arc groove 323, the screen plate 33 reciprocates in the second chute 38.

Specifically, when the pull rod 320 passes through the circular arc groove 323, the pull rod 320 is blocked by the protruding block 37, the phenomenon that the pull rod 320 is intermittently away from the inner side wall of the circular arc groove 323 occurs, so that the pull rod 320 pulls the elastic sheet 31 to straighten, the wavy change condition occurs, the wavy shape of the elastic sheet 31 also moves in the radial direction of the material pipe 2, and the elastic cloth 34 drives the screen plate 33 to reciprocally slide in the second sliding groove 38 to form a reciprocal screening action, so that powder paint is further screened.

Preferably, a plurality of storage tanks 4 are arranged in parallel on the peripheral direction of the outer wall of the storage tank 1, and during operation, powder paint can be added into the storage tank 1 at any time through the storage tanks 4; specifically, in the prior art, after the paint in the storage tanks 1 is used up, a new powder paint needs to be stopped and added again, so that the spraying efficiency is reduced.

Further, a feeding mechanism 5 is arranged at the inner bottom of the storage tank 4, the feeding mechanism 5 comprises an opening and closing plate 50 hinged at the inner bottom of the storage tank 4, the hinge point is close to the baffle plate 30, a sliding rod 51 is arranged at the bottom of the storage tank 4, a first block 52 is slidably arranged on the sliding rod 51, a connecting rod 53 is jointly hinged between the first block 52 and the opening and closing plate 50, the hinge point of the connecting rod 53 and the opening and closing plate 50 is close to the inner side wall of the storage tank 1, a material conveying opening 54 is formed at the bottom of one side of the storage tank 4 close to the baffle plate 30, the pull rod 320 corresponds to one storage tank 4, a second block 55 is fixedly connected to the pull rod 320, and in the stroke of the pull rod 320 straightening the elastic sheet 31, the second block 55 pushes the first block 52 to move towards the direction away from the baffle plate 30;

the storage tank 4 is far away from be equipped with first spacing order 56 on the one side inner wall of baffle 30, utilize the gravity of powder coating in the storage tank 4, open and shut the board 50 one end and lean on the first spacing order 56, at this moment, open and shut the board 50 other end and seal the material conveying mouth 54, the storage tank 4 is close to be equipped with second spacing order 57 on the one side inner wall of baffle 30, when first piece 52 is kept away from when the direction of baffle 30 is removed, open and shut the board 50 one end and keep away from first spacing order 56 gradually, open and shut the board 50 the other end and be close to gradually second spacing order 57, the material conveying mouth 54 is opened gradually and is made be in powder coating in the storage tank 4 get into in the cavity between material pipe 2 and the baffle 30.

Specifically, when the pull rod 320 moves circumferentially, during the process that one end of the pull rod 320 in the first chute 321 moves along the track thereof, the pull rod 320 moves in the circular arc-shaped groove 323, the pull rod 320 gradually straightens the elastic sheet 31, at this time, the pull rod 320 drives the second block 55 to move towards the first block 52 and generates thrust force to the first block 52, so that the first block 52 gradually moves away from the partition plate 30, the movement of the first block 52 on the slide rod 51 generates an upward trend on one end of the opening plate 50 away from the partition plate 30 through the connecting rod 53, the end of the opening plate 50 deflects upwards by taking the hinge point of the opening plate 50 and the storage tank 4 as a rotation axis, and gradually moves away from the first limiting step 56, the other end of the opening plate 50 gradually approaches the second limiting step 57, the material delivery port 54 gradually opens, the powder coating entering between the material pipe 2 and the partition plate 30 also gradually increases, when the pull rod 320 slides in the L-shaped groove 322, the elastic piece 31 returns to drive the pull rod 320 to gradually approach the partition board 30, the second block 55 moves towards the direction approaching the partition board 30, the first block 52 is not influenced by the movement of the second block 55, the powder coating in the storage tank 4 has gravity action on the opening and closing plate 50, the opening and closing plate 50 can reversely deflect, one end of the opening and closing plate is gradually close to the first limiting step 56, the other end of the opening and closing plate is gradually far away from the second limiting step 57, the material conveying opening 54 is gradually sealed, the first block 52 also gradually slides on the slide rod 51 towards the direction approaching the partition board 30, so that the powder coating in the storage tank 4 can be intermittently added into a cavity between the material pipe 2 and the partition board 30 in the process of stirring and ejecting the powder coating by the elastic piece 31, and the timing addition of the powder coating is realized.

Because of the effect of the protrusion 37 on the inner side wall of the circular arc groove 323, the second block 55 also moves reciprocally along with the pull rod 320, so that the opening and closing plate 50 is frequently affected by this, the powder coating in the storage tank 4 is frequently extruded, the extrusion is helpful to crush the agglomerated powder coating, and in the embodiment of the invention, the surface of the opening and closing plate 50 facing the powder coating is provided with a plurality of conical bodies 58, and the conical bodies 58 are more beneficial to combine with the opening and closing plate to further generate a certain crushing effect on the powder coating in the non-additive stage.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.

Claims

1. The powder spraying device comprises a storage barrel and a material pipe which is rotationally arranged on the axial middle line of the storage barrel, wherein during operation, powder coating in the storage barrel is sucked through the material pipe by utilizing gas flow to be sprayed out of a spray gun;

the material pipe penetrates through the material storage barrel, a plurality of material absorbing openings are arranged in parallel in the circumferential direction of the material pipe, a plurality of elastic sheets are in one-to-one correspondence with the material absorbing openings, the material absorbing openings are close to the inner bottom of the material storage barrel, a sieve plate which is obliquely arranged is arranged on each material absorbing opening on the material pipe, the lower end of the sieve plate is in sliding fit with the inner bottom of the material storage barrel, the higher end of the sieve plate is connected with the elastic sheets through elastic cloth,

an annular connecting plate is arranged in the circumferential direction between the material pipe and the partition plate, a screen plate is arranged on the surface of the connecting plate, which faces the inner bottom of the material storage barrel, the elastic sheet bounces up the powder coating to strike the screen plate, meshes on the screen plate are arranged in a three-dimensional irregular structure, the pulling piece comprises a pull rod which is in radial sliding connection with the partition plate along the material pipe, a first sliding groove is arranged on the inner side wall of the material storage barrel, one end of the pull rod is in sliding connection with the first sliding groove, and the other end of the pull rod is fixedly connected with the elastic sheet; along the rotation direction of the material pipe, the first sliding groove is formed by alternately connecting a plurality of sections of L-shaped grooves and a plurality of sections of arc-shaped grooves, the short sections of the L-shaped grooves are close to the partition plate, one end of each arc-shaped groove close to the partition plate is connected with the short section of the former L-shaped groove, the other end of each arc-shaped groove is connected with one end of the long section of the latter L-shaped groove far away from the partition plate,

when the baffle rotates, the pull rod is driven to slide in the first chute, the arc-shaped groove slides in the L-shaped groove, namely, one end of the pull rod in the first groove is gradually far away from the baffle at the moment, the pull rod can gradually straighten the elastic sheet, when the pull rod reaches a point at the junction of the arc-shaped groove and the L-shaped groove, namely, the pull rod is positioned at the position of the long section of the L-shaped groove farthest from the baffle, the limit of the inner side wall of the first groove can be lost, and therefore, under the action of resilience force of the elastic sheet, the end of the pull rod is instantaneously close to the baffle, and the elastic sheet can play an elastic ejection effect on powder paint.

2. A powder spraying device according to claim 1, wherein the interior bottom of the storage barrel is of inverted truncated cone configuration.

3. A powder spraying device according to claim 1, wherein the flow direction of the gas in the pipe is from the bottom of the storage tank toward the mouth of the tank, and the radial dimension of the internal structure of the pipe is gradually reduced from the inlet to the portion of the suction port away from the inlet.

4. A powder spraying device according to claim 1, characterized in that the part of the tube from the suction opening to the outlet opening is provided with a drying mechanism for removing moisture from the powder coating.

5. The powder spraying device according to claim 1, wherein a plurality of storage tanks are arranged in parallel in the circumferential direction of the outer wall of the storage tank, and powder paint can be added into the storage tank at any time through the storage tanks during operation.