WO2017028701A1 - 可自动清理的供粉中心 - Google Patents

可自动清理的供粉中心 Download PDF

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Publication number
WO2017028701A1
WO2017028701A1 PCT/CN2016/094064 CN2016094064W WO2017028701A1 WO 2017028701 A1 WO2017028701 A1 WO 2017028701A1 CN 2016094064 W CN2016094064 W CN 2016094064W WO 2017028701 A1 WO2017028701 A1 WO 2017028701A1
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WO
WIPO (PCT)
Prior art keywords
powder
air inlet
pressure
chamber
purging
Prior art date
Application number
PCT/CN2016/094064
Other languages
English (en)
French (fr)
Inventor
杨义远
Original Assignee
临朐远宏金属制品有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 临朐远宏金属制品有限公司 filed Critical 临朐远宏金属制品有限公司
Priority to EP16836565.8A priority Critical patent/EP3338899B1/en
Publication of WO2017028701A1 publication Critical patent/WO2017028701A1/zh

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16Arrangements for supplying liquids or other fluent material
    • B05B5/1683Arrangements for supplying liquids or other fluent material specially adapted for particulate materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404Arrangements for supplying particulate material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08Cleaning containers, e.g. tanks
    • B08B9/093Cleaning containers, e.g. tanks by the force of jets or sprays

Definitions

  • the present invention relates to an electrostatic powder coating apparatus, and more particularly to a powder supply center that can be automatically cleaned.
  • Electrostatic powder coating is a metal surface anti-corrosion decoration process. Compared with the traditional paint finishing process, electrostatic powder coating has the advantages of easy automatic production, good surface coating quality, economical and environmental protection, etc., so it is widely used in industrial production.
  • the powder supply center is a device commonly used in electrostatic powder coating, which comprises a powder bucket for containing powder, the powder bucket is a closed cylindrical structure, and the powder bucket is connected with the end thereof inserted into the powder bucket.
  • the powder tube and the powder tube are connected with the powder pump suction port.
  • the powder outlet of the powder pump is connected with the spray gun.
  • the powder pump sucks the powder from the powder tube inserted in the powder barrel, and then delivers it to the spray gun for spraying.
  • the existing powder supply center needs to change the powder. It needs to be smashed and the residual powder is removed and recovered. After cleaning, it is put back into the powder supply center to fill the new powder.
  • spray guns installed on the powder drum, it is necessary to clean the powder guns one by one. This process is cumbersome, consumes a long time and has low automation. Similarly, cleaning the powder drum outside is easy to cause pollution to the external environment.
  • the technical problem to be solved by the present invention is to provide a solution for quickly cleaning the powder supply center of the powder drum and each powder conveying pipeline.
  • the present invention includes a powder drum, which is characterized in that it further comprises a pressure maintaining casing, wherein the pressure maintaining casing is provided with a pressure detecting device, and the powder drum is suspended in the pressure maintaining casing.
  • the top of the pressure-retaining shell is provided with a closable hopper corresponding to the powder drum, a pressure-proof port is arranged on the top of the pressure-maintaining shell, and a powder-cleaning port is arranged at the bottom, and a voltage-regulating valve is installed on the voltage-stabilizing port.
  • the powder cleaning port is provided with a powder-filling valve; the top and bottom of the powder drum are open, and the bottom of the powder drum is provided with an air inlet chamber movable up and down in the pressure-retaining shell, and the top of the air inlet chamber is fixed There is a fluidized plate that can connect the air inlet chamber with the powder drum, and the air inlet chamber is installed at The drive device on the pressure-retaining casing is driven to close the bottom of the powder drum when the air inlet chamber is moved up to the highest point; the air inlet chamber is provided with an air inlet port, and the air inlet port is connected with the air inlet and outlet tube, The air inlet of the pressure-retaining casing is fixed with an air inlet pipe extending from the end of the pressure-retaining casing, the air-intake pipe is connected to the air inlet pipe, and the control pipe is connected to the air inlet pipe.
  • the air inlet valve has at least one powder outlet port on the side wall of the powder bucket, and a powder discharging pipe whose end portion protrudes from the pressure maintaining casing is connected to the powder discharging port;
  • a purging device for purging the inner cavity of the powder drum that can be moved up and down.
  • the pressure regulating valve is a three-way valve, wherein one port is connected with a communication tube, and the communication tube is in communication with the air inlet tube.
  • the top wall of the pressure holding casing is horizontally disposed, and any longitudinal section of the bottom wall of the pressure maintaining casing is curved, and the powder cleaning port is disposed at the lowest point of the bottom wall.
  • the bottom of the side wall of the powder bucket is provided with a powder discharge port, and the powder discharge port is connected with a powder discharge pipe whose end protrudes from the pressure maintaining casing, and the powder discharge pipe is arranged to control the pipe on and off. Discharge valve.
  • the purging device includes a driving cylinder fixed on the top of the pressure maintaining casing, the piston rod of the driving cylinder is extended and protrudes into the pressure maintaining casing, and the end of the piston rod is fixedly mounted a purging chamber that drives the cylinder to move up and down in the powder drum, the bottom wall of the purging chamber is provided with a plurality of purging holes, and the top wall of the purging chamber is provided with an air inlet.
  • An intake bellows is connected to the intake port, and the intake bellows is connected to an intake pipe fixed at the top of the pressure maintaining casing, and an intake valve for controlling the opening and closing of the pipeline is installed on the intake pipe.
  • the air inlet valve, the powder inlet valve, the intake valve and the pressure regulating valve are all electromagnetic valves and the control ends thereof are electrically connected to the control circuit respectively;
  • the pressure detecting device is a pressure sensor, and the signal output end and the control thereof The circuit is electrically connected.
  • the purging chamber is annular, and the inner surface thereof is connected to the piston rod of the driving cylinder through a connecting rod; the bottom wall of the purging chamber is provided with a plurality of purging holes, and the plurality of purging holes are arranged in a ring shape , and each purge hole is inclined, and all the purge holes are inclined in the same direction.
  • the driving device includes a main cylinder fixed on the pressure maintaining casing; the outer diameter of the air inlet chamber is larger than the outer diameter of the powder drum, and the outer edge of the top wall of the air inlet chamber is fixed with at least one A pull rod is disposed on the root, and the top end of the pull rod is connected to the piston rod of the main cylinder.
  • the driving device includes a driving cylinder, a purging chamber, an outer diameter of the air inlet chamber is larger than an outer diameter of the powder drum, and an outer edge of the top wall of the air inlet chamber is fixed with at least one tension rod
  • the top end of the pull rod is fixed with a horizontally extending pressing rod, and the end of the pressing rod can be press-fitted on the upper surface of the purging chamber, and the stroke of the driving cylinder can ensure that when the purging chamber is at the highest point ⁇
  • the fluidization plate of the air inlet chamber can close the bottom of the powder bucket;
  • the length of the drawbar is greater than the height of the powder bucket.
  • the outer surface of the powder bucket is fixed with a horizontally extending support rod, and the end of the support rod is fixed with a limit ring for limiting the pull rod, and the pull rod is worn at the limit position. Inside the ring.
  • the powder drum of the invention is suspended in the pressure-maintaining casing, and a voltage-stabilizing cavity is formed between the pressure-maintaining casing and the powder drum, and the air inlet valve and the pressure regulating valve are disposed through the air inlet chamber.
  • the space between the pressure-retaining shell and the powder drum is formed into a stabilizing space, and the pressure in the pressure-retaining shell is maintained at a set value by the opening and closing of the pressure-regulating valve.
  • Adjust the size of the inlet valve to adjust the intake air volume, and then adjust the fluidization effect and powdering speed of the powder.
  • the invention always maintains the pressure in the pressure-retaining shell at the set value, realizes the constant pressure powder supply of the powder drum, and improves the powder content in the unit volume by the fluidization of the powder by the air inlet. Powder amount.
  • a purging chamber which can move up and down is arranged, and the air inlet chamber can move up and down with the purging chamber to form a powder gap between the powder drum and the air inlet chamber, thereby realizing automatic cleaning of the powder barrel, and the powder barrel is cleaned up.
  • the powder discharging pipe can be cleaned by the dusting pipe, and the automatic cleaning of the invention can be realized by gas purging.
  • the invention adopts the control circuit control, improves the simplicity of the operation of the invention, and improves the degree of automation.
  • FIG. 2 is a schematic structural view of FIG. 1 taken along line A-A.
  • the powder supply center that can be automatically cleaned includes a powder drum 2 and a pressure maintaining casing 1 which are both cylindrical and coaxially arranged, and the powder drum 2 is suspended in the pressure holding casing 1
  • the suspension referred to herein means that the outer diameter of the powder drum 2 is smaller than the inner diameter of the pressure-retaining casing 1, and the top and bottom of the powder drum 2 respectively have a certain gap with the top and bottom of the pressure-retaining casing 1, respectively, so that the powder drum 2 An entire voltage stabilizing cavity is formed between the outer surface and the inner surface of the pressure holding casing 1.
  • This embodiment The outer surface of the intermediate powder bucket 2 is fixed with two horizontally disposed support rods 7, and the other end of the support rod 7 is fixed to the inner surface of the pressure-retaining casing 1 to realize the suspension of the powder drum 2.
  • the pressure detecting device 1 is provided with a pressure detecting device.
  • the top of the pressure maintaining casing 1 is provided with a closable hopper 12 corresponding to the powder drum 2, and a feeding pipe 13 extending into the powder drum 2 is disposed below the hopper 12.
  • the feeding pipe 13 is provided with a feeding valve 14 for controlling the opening and closing of the pipeline.
  • the top of the pressure maintaining casing 1 is provided with a voltage-stabilizing port, the bottom is provided with a powder cleaning port, and the pressure regulating port is provided with a pressure regulating valve 23, which is installed on the powder cleaning port. There is a powder valve.
  • the pressure-retaining casing 1 is provided with a purging device for blowing the inner cavity of the powder drum 2 so as to be movable up and down.
  • the top wall of the pressure-retaining casing 1 is horizontally disposed, and any longitudinal section of the bottom wall of the pressure-retaining casing 1 is curved, and the powder cleaning port is disposed at the lowest point of the bottom wall, and the pressure-proof casing of the structure is
  • the top wall level of the body 1 ensures the stability of the pressure above the powder drum 2, and the bottom wall is curved to facilitate powder cleaning.
  • the side of the pressure-retaining casing 1 is provided with a serviceable door for inspection.
  • the top and bottom of the powder bucket 2 are both open, and at least one powder outlet is arranged on the side wall of the powder bucket 2, and the powder outlet is disposed near the lower part of the powder bucket 2, which is convenient for powder discharge and connection on the powder outlet.
  • the bottom of the powder drum 2 is provided with an air inlet chamber 20 movable up and down within the pressure-retaining casing 1, and the air inlet chamber 20 is driven by a driving device mounted on the pressure-retaining casing 1, and moves up to the highest point on the air inlet chamber 20. ⁇ The bottom of the powder bucket 2 can be closed.
  • the air inlet chamber 20 is composed of a top wall, a bottom wall and a ring-shaped side wall.
  • the air inlet chamber 20 is disposed coaxially with the powder drum 2, and the outer diameter of the top wall of the air inlet chamber 20 is larger than the outer diameter of the powder drum 2, and the air inlet
  • the top wall of the chamber 20 is provided with a cornice whose outer diameter is slightly smaller than the inner diameter of the powder drum 2, and a fluidized plate 21 for connecting the inlet air chamber 20 and the powder drum 2 is fixed at the cornice, and the fluidizing plate 21 is provided.
  • the structure is prior art, and those skilled in the art can select a suitable fluidization plate 21 according to the specific fluidization requirements of the powder, so the structure of the fluidization plate 21 will not be described herein.
  • An air inlet is arranged on the side wall of the air inlet chamber 20, and an air inlet and outlet tube 25 is connected to the air inlet port.
  • the corresponding air inlet of the pressure maintaining housing 1 is fixed with an air inlet extending from the pressure-retaining housing 1 at its end.
  • the tube 26 is connected to the inlet duct 26, and the inlet duct 26 is provided with an inlet valve 27 for controlling the passage of the line.
  • the top of the pressure-retaining casing 1 can also be pressurized into the powder drum 2 to increase the powder output.
  • the pressure-regulating valve 23 is a three-way valve, and one of the ports is connected with a connecting pipe. 24, the communication pipe 24 is in communication with the air inlet pipe 26, and the communication between the two is located on the pipe section between the pressure maintaining casing 1 and the air inlet valve 27, and the other port is used for exhausting.
  • the foregoing purging device includes a driving cylinder 15 fixed on the top of the pressure-retaining casing 1, and the driving cylinder 15 is a double-acting cylinder having a simple structure, large stroke, and adjustable.
  • the piston rod 16 of the driving cylinder 15 is extended and protrudes into the pressure-retaining casing 1.
  • the end of the piston rod is fixed with a purging which can be moved up and down in the powder drum 2 under the driving of the driving cylinder 15.
  • the purging chamber 11 is in a ring shape.
  • the gas outlet pressure is larger, the purging can be cleaner, and the second is to facilitate the setting of the feeding tube 13, and the feeding tube 13 can be directly worn.
  • the central through hole of the purge chamber 11 extends into the powder drum 2 so that the two do not interfere.
  • the inner surface of the purge chamber 11 is connected to the piston rod of the drive cylinder 15 through a plurality of connecting rods 29, and the outer diameter of the purge chamber 11 is smaller than the inner diameter of the powder drum 2 and disposed coaxially with the powder drum 2, facilitating the purge chamber 11 It can be inserted into the powder bucket 2 and moved up and down in the powder bucket 2, thereby effectively purging the powder bucket 2.
  • the bottom wall of the purging chamber 11 is provided with a plurality of purging holes, and the plurality of purging holes are arranged in an annular shape, and each of the purging holes is inclined, and all the purging holes are inclined in the same direction, so that the purging chamber 11 is blown out.
  • the wind can form a whirlwind, ensuring that there is no dead angle in the purge.
  • An air inlet is arranged on the top wall of the purging chamber 11, and an air inlet and exhaust tube 17 is connected to the air inlet.
  • the air inlet tube 17 is connected to the air inlet tube 18 fixed on the top of the pressure maintaining housing 1, and the air inlet tube 18
  • An intake valve 19 that controls the opening and closing of the pipeline is mounted thereon.
  • the arrangement of the inlet bellows 25 and the inlet bellows 17 ensures that the inlet chamber 20 and the purge chamber 11 move up and down without affecting the connection structure of the tubes.
  • the driving device may include a main cylinder fixed on the pressure maintaining casing 1; the outer diameter of the air inlet chamber 20 is larger than the outer diameter of the powder drum 2, and the outer edge of the top wall of the air inlet chamber 20 is fixed. At least one pull rod is provided, and the top end of the pull rod is connected with the piston rod of the master cylinder.
  • the main cylinder drives the lever to move up and down, thereby moving the inlet chamber 20 up and down.
  • the purging device and the driving device are arranged in linkage with each other. That is, the driving device and the purging device share the driving cylinder 15 and the purging chamber 11.
  • the outer edge of the top wall of the air inlet chamber 20 is fixed with at least one pull rod 3 extending upward. In this embodiment, the two pull rods 3 are opposite.
  • each tie rod 3 is fixed with a horizontally extending pressure rod 4, and the distance between the ends of the two pressure rods 4 is smaller than the outer diameter of the purge chamber 11, so that the end portion of the pressure rod 4 can be press-fitted
  • the stroke of the driving cylinder 15 ensures that the fluidizing plate 21 at the highest point of the inlet chamber 20 when the purge chamber 11 is located at the highest point can close the bottom of the powder drum 2, that is, when the driving cylinder 15 is driven to blow
  • the sweeping chamber 11 is moved upwards, and the pressing rod 4 moves up with the purging chamber 11, thereby driving the air inlet chamber 20 to move upward, so that the fluidizing plate 21 of the air inlet chamber 20 closes the bottom of the powder drum 2, in view of the foregoing structural requirements,
  • the length of the tie rod 3 needs to be greater than the height of the powder drum 2.
  • the difference between the length of the tie rod 3 and the height of the powder drum 2 determines the powder discharge gap between the bottom of the powder drum 2 and the air inlet chamber 20 after the air inlet chamber 20 is moved down.
  • the driving device of this structure ensures that the air inlet chamber 20 is only moved in the up and down direction, and lateral turbulence does not occur, which affects the sealing between the fluidizing plate 21 and the powder drum 2, and the outer surface of the powder drum 2 is fixed.
  • the limiting rod 5 is arranged horizontally, and the end of the limiting rod 5 is fixed with a limiting ring 6 for limiting the rod 3, and the rod 3 is worn in the limiting ring 6, and the limiting ring 6 is Pull rod 3 is limited
  • the position prevents the air inlet chamber 20 from laterally swaying, affecting the sealing of the fluidized plate 21 and the bottom of the powder drum 2, and the limiting mechanism can also be limited by other prior art techniques.
  • the invention can also provide an annular groove on the lower surface of the powder drum 2, and a sealing ring is installed in the groove, thereby increasing the sealing property of the bottom of the powder drum 2 in contact with the air inlet chamber 20.
  • the intake valve 27, the powder inlet valve, the feed valve 14, the intake valve 19, and the pressure regulator 23 are all selected from solenoid valves and their control ends are electrically connected to the control circuit respectively;
  • the device is a pressure sensor whose signal output is electrically connected to the control circuit.
  • the control circuit can be selected by a PLC control program, and the specific structure thereof can be obtained by a person skilled in the art according to the interlocking requirement without spending any creative work, and will not be described herein.
  • the present invention is provided with a powder discharge port at the bottom of the side wall of the powder bucket, and a powder discharge pipe 28 whose end portion protrudes from the pressure maintaining casing is connected to the powder discharge port, and the powder discharge port may be plural, and the powder discharge port may be plural.
  • the side wall is evenly distributed, and the number of powder discharging pipes corresponds to each other.
  • Each of the discharging pipes is provided with a powder discharging valve which can control the opening and closing of the pipeline, and the powder discharging pipe can be connected with the original powder holding barrel.
  • the powder discharging pipe 22 is connected with the spray gun, and the air inlet valve 27 is opened, so that a certain pressure is reached in the pressure maintaining casing 1, and the pressure regulating valve 23 is intermittently opened to relieve the pressure regulating valve 23.
  • the pressure in the pressure-retaining casing 1 is maintained at a certain pressure, and the air entering the air inlet chamber 20 causes the powder to be fluidized.
  • the spray gun is smashed and sprayed, and the pressure inside the pressure-retaining casing 1 is lower than that.
  • the set value ⁇ the control circuit controls the regulator valve 23 to connect to the valve port of the communication tube 24, and the wind enters the pressure-retaining casing 1 from the inlet duct 26 and the surge port, and the powder in the powder bucket 2 is affected by
  • the blowing of the lower wind is also pressed by the wind entering from the pressure regulating port to increase the speed at which the powder is discharged from the powder outlet, and the powder content in the unit volume is also increased, and the spraying effect is improved.
  • the present invention always maintains the pressure inside the pressure-retaining casing 1 at a set value, and achieves constant pressure powder supply of the powder drum 2.
  • the powder bucket 2 cleans the powder replacement hopper, the air inlet valve 27 is closed, the powder discharge valve is snoring, and the air inlet valve of the purge device is snoring for purging, and the ⁇ drive cylinder is in a standby state, so that the purge device is quiet.
  • the purging most of the powder is discharged through the powder discharge pipe under the pressure of the upper wind. Through the setting of the powder discharge pipe, the utilization rate of the remaining powder in the powder drum is improved, and the running cost of the whole set of equipment is reduced.
  • the drive cylinder is further opened for purging up and down.
  • the driving cylinder 15 drives the purge chamber 11 to move downward and form a cyclone for purging.
  • the weaving air chamber 20 is moved downward by the self-gravity and separated from the powder drum 2, and the powder is blown out from the powder gap between the powder drum 2 and the air inlet chamber 20, and falls to the bottom of the pressure-retaining casing 1
  • the purging device and the air inlet chamber 20 return to the original position, and the powder valve is blown, and the airflow passes through the pores between the powder drum 2 and the pressure holding casing 1 and purifies the residual powder therein.
  • the recycled powder falling on the bottom of the pressure holding casing 1 is blown out.
  • the powder valve is closed, the powder tube 22 is blown one by one, and the 22 lines of each powder discharging tube are cleaned.
  • the pressure reducing valve 23 is used for pressure relief, the pressure relief is completed, and the hopper is provided.
  • the feeding valve 14 is powdered, and after the powder is added, the present invention is in a state to be operated.
  • a purging chamber 11 that can be moved up and down is provided, and the air inlet chamber 20 can move up and down with the purging chamber 11, so that a powder gap is formed between the powder drum 2 and the air inlet chamber 20, and the automatic cleaning of the powder drum 2 is realized.
  • the powder pipe 22 can be blown out to clean the 22-way powder pipe, and the automatic cleaning of the present invention is realized by gas purging.
  • the invention adopts the control circuit control, improves the simplicity of the operation of the invention, and improves the degree of automation.

Abstract

一种可自动清理的供粉中心,其粉桶(2)悬装在保压壳体(1)内,保压壳体(1)顶部设有稳压口、底部设有清粉口;粉桶(2)顶部、底部均敞口,粉桶(2)底部设有可上下移动的进风室(20),进风室(20)顶部固装有流化板(21),进风室(20)由驱动装置驱动;进风室(20)上设有进风口,进风口上连接有进风伸缩管(25),保压壳体(1)上固装有进风管(26),进风伸缩管(25)与进风管(26)连接,进风管(26)上安装有进风阀(27);粉桶(2)侧壁上至少开设有一个出粉口,出粉口上连接有出粉管(22);保压壳体(1)上固装有可上下移动的吹扫装置。进风室可随吹扫装置上下移动,使粉桶与进风室之间形成出粉间隙,通过气体吹扫实现了粉桶的自动清理。

Description

可自动清理的供粉中心 技术领域
[0001] 本发明涉及一种静电粉末喷涂设备, 特别是涉及一种可自动清理的供粉中心。
背景技术
[0002] 静电粉末喷涂是一种金属表面防腐装饰工艺, 相对传统的油漆涂饰工艺, 静电 粉末喷涂具有易于自动化生产、 表面喷涂质量好、 经济环保等优势, 因而在工 业生产中应用十分广泛。
[0003] 其中, 供粉中心是静电粉末喷涂中常用的一个设备, 其包括用于盛装粉末的粉 桶, 粉桶为封闭的筒状结构, 粉桶上连接有其端部插入粉桶内的粉管, 粉管与 粉泵吸粉口连接, 粉泵的出粉口与喷枪连接, 使用吋, 粉泵从插在粉桶内的粉 管吸出粉末, 然后输送到喷枪内进行喷涂。 现有的供粉中心在需要换粉吋, 需 要将粉桶打幵将其中残余粉末清除及回收, 清理完后再重新放入供粉中心进行 装填新粉。 当粉桶上安装的喷枪较多吋, 需要逐个粉枪粉管进行清理, 此过程 较为繁琐, 耗费吋间较长, 自动化程度低; 同吋, 在外部清理粉桶容易对外部 环境造成污染。
技术问题
[0004] 本发明要解决的技术问题是提供一种能快速清理粉桶及各输粉管线的供粉中心 问题的解决方案
技术解决方案
[0005] 为解决上述技术问题, 本发明包括粉桶, 其结构特点是其还包括保压壳体, 所 述保压壳体内安装有压力检测装置, 所述粉桶悬装在保压壳体内, 所述保压壳 体顶部对应粉桶设有可封闭的加料斗, 所述保压壳体顶部设有稳压口、 底部设 有清粉口, 所述稳压口上安装有稳压阀, 所述清粉口上安装有淸粉阀; 所述粉 桶顶部、 底部均敞口, 所述粉桶底部设有可在保压壳体内上下移动的进风室, 所述进风室顶部固装有可将进风室与粉桶连通的流化板, 所述进风室由安装在 保压壳体上的驱动装置驱动, 当进风室上移至最高点吋可将粉桶底部封闭; 所 述进风室上设有进风口, 进风口上连接有进风伸缩管, 所述保压壳体上对应进 风口固装有其端部伸出保压壳体的进风管, 所述进风伸缩管与进风管连接, 所 述进风管上安装有控制管路通断的进风阀; 所述粉桶侧壁上至少幵设有一个出 粉口, 出粉口上连接有其端部伸出保压壳体的出粉管; 所述保压壳体上固装有 可上下移动的用于吹扫粉桶内腔的吹扫装置。
[0006] 所述稳压阀为三通阀, 其中一个口连接有连通管, 所述连通管与进风管连通。
[0007] 所述保压壳体的顶壁水平设置, 所述保压壳体的底壁的任一纵截面呈弧形, 所 述清粉口设置在底壁的最低处。
[0008] 所述粉桶侧壁的底部幵设有排粉口, 所述排粉口上连接有其端部伸出保压壳体 的排粉管, 排粉管上设置可控制管路通断的排粉阀。
[0009] 所述吹扫装置包括固装在保压壳体顶部的驱动气缸, 所述驱动气缸的活塞杆下 伸并伸入保压壳体内, 所述活塞杆的端部固装有可在驱动气缸驱动下在粉桶内 上下移动的吹扫室, 所述吹扫室的底壁上幵设有多个吹扫孔, 所述吹扫室的顶 壁上幵设有进气口, 所述进气口上连接有进气伸缩管, 所述进气伸缩管与固装 在保压壳体顶部的进气管连接, 所述进气管上安装有控制管路通断的进气阀。
[0010] 所述进风阀、 淸粉阀、 进气阀和稳压阀均为电磁阀且其控制端分别与控制电路 电连接; 所述压力检测装置为压力传感器, 其信号输出端与控制电路电连接。
[0011] 所述吹扫室呈环状, 其内表面与驱动气缸的活塞杆通过连接杆连接; 吹扫室的 底壁上幵设有多个吹扫孔, 多个吹扫孔呈环状排布, 且每个吹扫孔倾斜设置、 所有吹扫孔倾斜方向相同。
[0012] 所述驱动装置包括固装在保压壳体上的主气缸; 所述进风室的外径大于粉桶的 外径, 所述进风室顶壁的外缘固装有至少一根上伸设置的拉杆, 所述拉杆的顶 端与主气缸的活塞杆连接。
[0013] 所述驱动装置包括驱动气缸、 吹扫室, 所述进风室的外径大于粉桶的外径, 所 述进风室顶壁的外缘固装有至少一根上伸设置的拉杆, 所述拉杆的顶端固装有 水平内伸设置的压杆, 所述压杆的端部可压装在吹扫室的上表面, 且驱动气缸 的行程可保证当吹扫室位于最高点吋进风室的流化板可将粉桶底部封闭; 所述 拉杆的长度大于粉桶的高度。
[0014] 所述粉桶的外表面固装有水平外伸设置的支撑杆, 所述支撑杆的端部固装有用 于对拉杆进行限位的限位环, 所述拉杆穿装在限位环内。
发明的有益效果
有益效果
[0015] 采用上述结构后, 本发明中粉桶悬装在保压壳体内, 保压壳体与粉桶之间形成 稳压腔, 通过进风室进风阀和稳压阀的设置, 可在进风对粉末进行流化的同吋 , 使保压壳体与粉桶之间的空间形成稳压空间, 通过稳压阀的幵启关闭使保压 壳体内压力维持在设定值, 通过调节进风阀幵启的大小, 调节进气量, 进而调 节粉末的流化效果及出粉速度。 本发明始终保持保压壳体内压力维持在设定值 , 实现了粉桶的恒压供粉, 且由于是通过进风对粉末流化加压出粉, 提高了出 粉吋单位体积内的含粉量。 本发明中设置可上下移动的吹扫室, 进风室可随吹 扫室上下移动, 使粉桶与进风室之间形成出粉间隙, 实现了粉桶的自动清理, 粉桶清理完毕, 即可打幵出粉管对出粉管路进行清理, 通过气体吹扫实现本发 明的自动清理。 本发明采用控制电路控制, 提高了本发明操作的简便性, 自动 化程度提高。
对附图的简要说明
附图说明
[0016] 下面结合附图及具体实施方式对本发明作进一步详细说明:
[0017] 图 1为本发明的结构示意图;
[0018] 图 2为图 1沿 A-A线剖视的结构示意图。
本发明的实施方式
[0019] 如图所示, 可自动清理的供粉中心包括均呈圆筒状且同轴线设置的粉桶 2和保 压壳体 1, 粉桶 2悬装在保压壳体 1内, 此处所说的悬装, 即指粉桶 2的外径小于 保压壳体 1的内径、 粉桶 2顶部和底部分别与保压壳体 1的顶部和底部保留一定间 隙, 从而使粉桶 2外表面与保压壳体 1内表面之间形成一整个稳压腔。 本实施例 中粉桶 2的外表面固接有两根水平设置的支撑杆 7, 支撑杆 7的另一端部与保压壳 体 1内表面固接实现粉桶 2的悬装。
[0020] 保压壳体 1内安装有压力检测装置, 保压壳体 1顶部对应粉桶 2设有可封闭的加 料斗 12, 加料斗 12下方设有伸入粉桶 2内的加料管 13, 加料管 13上安装有控制管 路通断的加料阀 14, 保压壳体 1顶部设有稳压口、 底部设有清粉口, 稳压口上安 装有稳压阀 23, 清粉口上安装有淸粉阀。 保压壳体 1上固装有可上下移动的用于 吹扫粉桶 2内腔的吹扫装置。 本实施例中保压壳体 1的顶壁水平设置, 保压壳体 1 的底壁的任一纵截面呈弧形, 清粉口设置在底壁的最低处, 此种结构的保压壳 体 1其顶壁水平可保证粉桶 2上方压力的稳定, 其底壁呈弧形, 便于清粉。 为便 于检修, 保压壳体 1的侧部安装有可幵关的检修操作门。
[0021] 本实施例中粉桶 2顶部、 底部均敞口, 粉桶 2侧壁上至少幵设有一个出粉口, 出 粉口靠近粉桶 2下部设置, 便于出粉, 出粉口上连接有其端部伸出保压壳体 1的 出粉管 22。 粉桶 2底部设有可在保压壳体 1内上下移动的进风室 20, 进风室 20由 安装在保压壳体 1上的驱动装置驱动, 当进风室 20上移至最高点吋可将粉桶 2底 部封闭。 进风室 20由顶壁、 底壁及环形设置的侧壁组成, 进风室 20与粉桶 2同轴 线设置, 进风室 20顶壁的外径大于粉桶 2的外径, 进风室 20的顶壁上幵设有其外 径略小于粉桶 2内径的幵口并在幵口处固装有可将进风室 20与粉桶 2连通的流化 板 21, 流化板 21的结构为现有技术, 本领域的技术人员根据粉末的具体流化要 求即可选用出适合的流化板 21, 所以此处不再赘述流化板 21的结构。 进风室 20 的侧壁上幵设有进风口, 进风口上连接有进风伸缩管 25, 保压壳体 1上对应进风 口固装有其端部伸出保压壳体 1的进风管 26, 进风伸缩管 25与进风管 26连接, 进 风管 26上安装有控制管路通断的进风阀 27。 为使本发明当保压壳体 1内压力低于 一定值吋其顶部也可向粉桶 2内补压, 提高出粉量, 稳压阀 23选用三通阀, 其中 一个口连接有连通管 24, 连通管 24与进风管 26连通, 两者连通处位于保压壳体 1 与进风阀 27之间的管段上, 其中另一个口用于排气。
[0022] 前述吹扫装置包括固装在保压壳体 1顶部的驱动气缸 15, 驱动气缸 15选用结构 简单、 行程大且可调的双作用气缸。 驱动气缸 15的活塞杆 16下伸并伸入保压壳 体 1内, 活塞杆的端部固装有可在驱动气缸 15驱动下在粉桶 2内上下移动的吹扫 室 11, 吹扫室 11呈环状, 一是在同等进气压力下, 气体的出气压力会较大, 可 吹扫的更干净, 二是便于加料管 13的设置, 加料管 13可直接穿过吹扫室 11的中 部通孔伸入粉桶 2内, 这样两者不会发生干涉。 吹扫室 11的内表面与驱动气缸 15 的活塞杆通过多根连接杆 29连接, 吹扫室 11的外径小于粉桶 2的内径并与粉桶 2 同轴线设置, 便于吹扫室 11可伸入粉桶 2内并在粉桶 2内上下移动, 从而对粉桶 2 进行有效的吹扫。 吹扫室 11的底壁上幵设有多个吹扫孔, 多个吹扫孔呈环状排 布, 且每个吹扫孔倾斜设置、 所有吹扫孔倾斜方向相同, 从而使吹扫室 11吹出 的风可以形成旋风, 保证吹扫无死角。 吹扫室 11的顶壁上幵设有进气口, 进气 口上连接有进气伸缩管 17, 进气伸缩管 17与固装在保压壳体 1顶部的进气管 18连 接, 进气管 18上安装有控制管路通断的进气阀 19。 进风伸缩管 25和进气伸缩管 1 7的设置可保证进风室 20和吹扫室 11上下移动吋不影响管路的连接结构。
[0023] 本发明中驱动装置可包括固装在保压壳体 1上的主气缸; 进风室 20的外径大于 粉桶 2的外径, 进风室 20顶壁的外缘固装有至少一根上伸设置的拉杆, 拉杆的顶 端与主气缸的活塞杆连接。 主气缸驱动拉杆上下移动, 进而使进风室 20上下移 动。
[0024] 为使本发明结构更简单, 本实施例中将吹扫装置和驱动装置相互联动设置。 即 驱动装置和吹扫装置共用驱动气缸 15和吹扫室 11, 进风室 20顶壁的外缘固装有 至少一根上伸设置的拉杆 3, 本实施例中拉杆 3为两根, 其相对设置, 每根拉杆 3 的顶端固装有水平内伸设置的压杆 4, 两压杆 4端部之间的距离小于吹扫室 11的 外径, 从而使压杆 4的端部可压装在吹扫室 11的上表面, 且驱动气缸 15的行程可 保证当吹扫室 11位于最高点吋进风室 20的流化板 21可将粉桶 2底部封闭, 即当驱 动气缸 15驱动吹扫室 11上移吋, 压杆 4随吹扫室 11上移, 从而带动进风室 20上移 , 进而使进风室 20的流化板 21将粉桶 2底部封闭, 鉴于前述结构要求, 拉杆 3的 长度需大于粉桶 2的高度, 拉杆 3长度与粉桶 2高度之差的大小决定进风室 20下移 后粉桶 2底部与进风室 20之间的出粉间隙。 此种结构的驱动装置, 为保证进风室 20仅做上下方向的移动、 不会发生横向窜动, 影响流化板 21与粉桶 2之间的密封 性, 粉桶 2的外表面固装有水平外伸设置的限位杆 5, 限位杆 5的端部固装有用于 对拉杆 3进行限位的限位环 6, 拉杆 3穿装在限位环 6内, 限位环 6对拉杆 3进行限 位, 防止进风室 20横向窜动, 影响流化板 21与粉桶 2底部的密封, 限位机构也可 采用其他现有技术进行限位。 本发明还可在粉桶 2的下表面设置环形的凹槽, 凹 槽内安装密封圈, 从而增大粉桶 2底部与进风室 20接触吋的密封性。
[0025] 为提高本发明的自动化程度, 进风阀 27、 淸粉阀、 加料阀 14、 进气阀 19和稳压 阀 23均选用电磁阀且其控制端分别与控制电路电连接; 压力检测装置为压力传 感器, 其信号输出端与控制电路电连接。 控制电路可选用 PLC控制程序, 其具体 结构, 本领域技术人员根据联锁要求即可不花费创造性劳动得出, 在此不再赘 述。
[0026] 由于喷涂吋, 每次清理后保压壳体内表面可能会存留部分粉末, 每批次使用的 粉末的颜色等可能不同, 若粉桶内存留较多的粉末, 进行清理吋, 较多粉末可 能会与保压壳体内表面的残留粉末混合, 造成粉末被污染, 无法再次使用。 所 以本发明在粉桶侧壁的底部幵设有排粉口, 排粉口上连接有其端部伸出保压壳 体的排粉管 28, 排粉口可以为多个, 其在粉桶的侧壁上均匀环布, 排粉管数量 与其相对应, 每根排粉管上设置可控制管路通断的排粉阀, 排粉管可与原粉末 盛装桶连接。
[0027] 喷涂预备吋, 出粉管 22与喷枪连接, 幵启进风阀 27, 使保压壳体 1内达到一定 压力, 并间断式幵启稳压阀 23, 使稳压阀 23泄压使保压壳体 1内压力维持在一定 压力, 同吋进风室 20的进风使粉末流化, 流化好后, 打幵喷枪, 幵始喷涂, 当 保压壳体 1内压力低于设定值吋, 控制电路控制稳压阀 23连接连通管 24的阀口打 幵, 风同吋从进风管 26和稳压口进入保压壳体 1, 此吋粉桶 2内粉末既受下部风 的吹动, 又受从稳压口进入的风的下压, 提高粉末从出粉口出粉的速度, 同吋 还提高了单位体积内的含粉量, 提高喷涂效果。 且本发明始终保持保压壳体 1内 压力维持在设定值, 实现了粉桶 2的恒压供粉。
[0028] 粉桶 2清理换粉吋, 进风阀 27关闭, 排粉阀打幵, 吹扫装置的进风阀打幵进行 吹扫, 此吋驱动气缸处于待运行状态, 使吹扫装置静置吹扫, 大部分粉末在上 部风的压力下经排粉管排出, 通过排粉管的设置, 提高了粉桶内剩余粉末的利 用率, 降低了整套设备的运行成本。 粉桶内粉末清理完毕后, 再幵启驱动气缸 进行上下吹扫。 驱动气缸 15驱动吹扫室 11向下移动并同吋形成旋风进行吹扫, 此吋进风室 20在自身重力作用下下移与粉桶 2分离, 粉末幵始从粉桶 2与进风室 2 0之间的出粉间隙吹出, 落到保压壳体 1底部, 经过多次往复吹扫, 吹扫装置与 进风室 20回到原位置, 打幵淸粉阀, 气流从粉桶 2与保压壳体 1之间的孔隙经过 并吹扫此处的残存粉, 同吋将落在保压壳体 1底部的回收粉吹出。 回收粉吹出后 , 关闭淸粉阀, 逐个打幵出粉管 22, 对各个出粉管 22线进行清理, 清理完毕, 打幵稳压阀 23进行泄压, 泄压完成, 打幵加料斗 12的加料阀 14, 进行加粉, 粉 末添加完毕, 本发明即处于待运行状态。 本发明中设置可上下移动的吹扫室 11 , 进风室 20可随吹扫室 11上下移动, 使粉桶 2与进风室 20之间形成出粉间隙, 实 现了粉桶 2的自动清理, 粉桶 2清理完毕, 即可打幵出粉管 22对出粉管 22路进行 清理, 通过气体吹扫实现本发明的自动清理。 本发明采用控制电路控制, 提高 了本发明操作的简便性, 自动化程度提高。
以上所述仅为本发明的优选实施例, 并不用于限制本发明。 前述实施例对本发 明进行了详细的说明, 对于本领域的技术人员来说, 其依然可以对前述各实施 例所记载的技术方案进行修改, 或者对其中部分技术特征进行等同替换。 但凡 在本发明的发明构思范围之内, 所做的任何修改、 等同替换、 改进等, 均包含 在本发明的保护范围之内。

Claims

权利要求书
一种可自动清理的供粉中心, 包括粉桶 (2) , 其特征是其还包括保 压壳体 (1) , 所述保压壳体 (1) 内安装有压力检测装置, 所述粉桶
(2) 悬装在保压壳体 (1) 内, 所述保压壳体 (1) 顶部对应粉桶 (2 ) 设有可封闭的加料斗 (12) , 所述保压壳体 (1) 顶部设有稳压口 、 底部设有清粉口, 所述稳压口上安装有稳压阀 (23) , 所述清粉口 上安装有淸粉阀; 所述粉桶 (2) 顶部、 底部均敞口, 所述粉桶 (2) 底部设有可在保压壳体 (1) 内上下移动的进风室 (20) , 所述进风 室 (20) 顶部固装有可将进风室 (20) 与粉桶 (2) 连通的流化板 (2 1) , 所述进风室 (20) 由安装在保压壳体 (1) 上的驱动装置驱动, 当进风室 (20) 上移至最高点吋可将粉桶 (2) 底部封闭; 所述进风 室 (20) 上设有进风口, 进风口上连接有进风伸缩管 (25) , 所述保 压壳体 (1) 上对应进风口固装有其端部伸出保压壳体 (1) 的进风管
(26) , 所述进风伸缩管 (25) 与进风管 (26) 连接, 所述进风管 ( 26) 上安装有控制管路通断的进风阀 (27) ; 所述粉桶 (2) 侧壁上 至少幵设有一个出粉口, 出粉口上连接有其端部伸出保压壳体 (1) 的出粉管 (22) ; 所述保压壳体 (1) 上固装有可上下移动的用于吹 扫粉桶 (2) 内腔的吹扫装置。
根据权利要求 1所述的可自动清理的供粉中心, 其特征是所述稳压阀
(23) 为三通阀, 其中一个口连接有连通管 (24) , 所述连通管 (24 ) 与进风管 (26) 连通。
根据权利要求 1所述的可自动清理的供粉中心, 其特征是所述保压壳 体 (1) 的顶壁水平设置, 所述保压壳体 (1) 的底壁的任一纵截面呈 弧形, 所述清粉口设置在底壁的最低处。
根据权利要求 1所述的可自动清理的供粉中心, 其特征是所述粉桶侧 壁的底部幵设有排粉口, 所述排粉口上连接有其端部伸出保压壳体的 排粉管 (28) , 排粉管上设置可控制管路通断的排粉阀。
根据权利要求 1所述的可自动清理的供粉中心, 其特征是所述吹扫装 置包括固装在保压壳体 (1) 顶部的驱动气缸 (15) , 所述驱动气缸 ( 15) 的活塞杆下伸并伸入保压壳体 (1) 内, 所述活塞杆的端部固 装有可在驱动气缸 (15) 驱动下在粉桶 (2) 内上下移动的吹扫室 (1 1) , 所述吹扫室 (11) 的底壁上幵设有多个吹扫孔, 所述吹扫室 (1 1) 的顶壁上幵设有进气口, 所述进气口上连接有进气伸缩管 (17) , 所述进气伸缩管 (17) 与固装在保压壳体 (1) 顶部的进气管 (18 ) 连接, 所述进气管 (18) 上安装有控制管路通断的进气阀 (19) 。
[权利要求 6] 根据权利要求 5所述的可自动清理的供粉中心, 其特征是所述进风阀
(27) 、 淸粉阀、 进气阀 ( 19) 和稳压阀 (23) 均为电磁阀且其控制 端分别与控制电路电连接; 所述压力检测装置为压力传感器, 其信号 输出端与控制电路电连接。
[权利要求 7] 根据权利要求 5所述的可自动清理的供粉中心, 其特征是所述吹扫室
( 11) 呈环状, 其内表面与驱动气缸 (15) 的活塞杆通过连接杆 (29 ) 连接; 吹扫室 (11) 的底壁上幵设有多个吹扫孔, 多个吹扫孔呈环 状排布, 且每个吹扫孔倾斜设置、 所有吹扫孔倾斜方向相同。
[权利要求 8] 根据权利要求 1至 7中任一项所述的可自动清理的供粉中心, 其特征是 所述驱动装置包括固装在保压壳体 (1) 上的主气缸; 所述进风室 (2 0) 的外径大于粉桶 (2) 的外径, 所述进风室 (20) 顶壁的外缘固装 有至少一根上伸设置的拉杆 (3) , 所述拉杆 (3) 的顶端与主气缸的 活塞杆连接。
[权利要求 9] 根据权利要求 5至 7中任一项所述的可自动清理的供粉中心, 其特征是 所述驱动装置包括驱动气缸 (15) 、 吹扫室 (11) , 所述进风室 (20 ) 的外径大于粉桶 (2) 的外径, 所述进风室 (20) 顶壁的外缘固装 有至少一根上伸设置的拉杆 (3) , 所述拉杆 (3) 的顶端固装有水平 内伸设置的压杆 (4) , 所述压杆 (4) 的端部可压装在吹扫室 (11) 的上表面, 且驱动气缸 (15) 的行程可保证当吹扫室 (11) 位于最高 点吋进风室 (20) 的流化板 (21) 可将粉桶 (2) 底部封闭; 所述拉 杆 (3) 的长度大于粉桶 (2) 的高度。 [权利要求 10] 根据权利要求 9所述的可自动清理的供粉中心, 其特征是所述粉桶 (2 ) 的外表面固装有水平外伸设置的限位杆 (5) , 所述限位杆 (5) 的 端部固装有用于对拉杆 (3) 进行限位的限位环 (6) , 所述拉杆 (3 ) 穿装在限位环 (6) 内。
PCT/CN2016/094064 2015-08-17 2016-08-09 可自动清理的供粉中心 WO2017028701A1 (zh)

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