CN1058927A - The improvement of sand blasting unit - Google Patents

The improvement of sand blasting unit Download PDF

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Publication number
CN1058927A
CN1058927A CN91103064A CN91103064A CN1058927A CN 1058927 A CN1058927 A CN 1058927A CN 91103064 A CN91103064 A CN 91103064A CN 91103064 A CN91103064 A CN 91103064A CN 1058927 A CN1058927 A CN 1058927A
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CN
China
Prior art keywords
pressure
blast media
carrier pipe
inch
pounds
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Granted
Application number
CN91103064A
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Chinese (zh)
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CN1027873C (en
Inventor
劳伦斯·克什倪尔
米歇尔·S·拉约尔
威廉姆·E·斯皮尔丝
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Church and Dwight Co Inc
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Church and Dwight Co Inc
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Publication of CN1058927A publication Critical patent/CN1058927A/en
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Publication of CN1027873C publication Critical patent/CN1027873C/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0084—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a mixture of liquid and gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
    • B24C7/0061—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier of feed pressure

Abstract

The pressure that is higher than the pipeline that medium and air mix mutually by control sand-spraying pot pressure makes mixture be transported to nozzle, be transported to workpiece then and improved conventional industrial pressure sand blasting unit as shown below, one have medium control appliance fixing but that be easy to change area be installed between sand-spraying pot and the medium/air mixing line with the measuring media flow and keep sand-spraying pot and pipeline between pressure reduction, when flow velocity is low (being lower than 10 Pounds Per Minutes), this is that the control medium flow is desired.

Description

The improvement of sand blasting unit
The present invention relates to a kind of improved sand blasting unit that particulate in the Compressed Gas is directly sprayed to workpiece.
Common sand blasting unit comprises a pressure vessel or is used for storing sand-spraying pot as this class ejection medium of sand, they are connected with compressed gas source by a pipe unit, and a measurement mechanism of measuring from the sand-spraying pot medium arranged, during work, the pressure of sand-spraying pot a little more than or equal the pressure of carrier pipe.Sand and (or) mixture of Compressed Gas sends into a nozzle, at this, sand is accelerated and directly sprays to workpiece.The flow of sand or other ejection medium is determined by device size.Usually the rate-of flow that industrial abrasive blast equipment is commonly used is 20 to 30 pounds of per minutes, and about 1.2 pounds sand is about 1.0 pounds with the standard consumption of air, draw like this one quantitative than being 1.20.
When needs are removed as coating with lacquer this type coating or clean as aluminium, when the synthetic of magnesium and plastics or similar object are surperficial, traditionally often will be as sodium chloride, the inorganic salts of making abrasive of this class low-corrosiveness of sodium acid carbonate are used for abrasive blast equipment.When using similar abrasive blast equipment, few many of the flow during with the flow-rate ratio usefulness sand sandblast of the medium of making abrasive of low-corrosiveness generally are about 0.5 Pounds Per Minute to 10 Pounds Per Minutes.Like this, the medium that needs and the ratio of gas are just very low, and the scope of its ratio is between 0.05 to 0.25.
Yet, under low like this flow, use traditional abrasive blast equipment, the continuity that keep flow is difficult, as the sub-medium of this based fine particles of sodium acid carbonate, according to they proper properties own, it is difficult utilizing pneumatic system to transmit.Furtherly, when they place malaria, be easy to the caking, and when sandblast employed such just Compressed Gas.Endeavouring to improve in the process of media flow, often in bicarbonate, add glidant, as hydrophobic silex.But up to the present, in fact evenly to flow to nozzle be impossible to the bicarbonate material, and the inhomogeneous mobile meeting of blast media causes erratic operation, this volatile operation, the result has increased scavenging period, even has damaged meticulous surface to a certain extent.
Like this, just wish to have a kind of sand blasting unit, can transmit blast media with uniform flow rate, its flow can be controlled in the intended manner, the medium that produces when flowing and the weight ratio of gas are between 0.05～0.25, the structure of this device is similar to traditional industrial, effectively abrasive blast equipment.
The present invention provides the gas source of an independent gas piping, by a pressure regulator gas is delivered in the sand-spraying pot, and the pressure that described pressure regulator provides for sand-spraying pot is greater than the pressure in the carrier pipe.The pressure differential that is produced is kept by an orifice plate, and this orifice plate has a predetermined hole area to be located between sand-spraying pot and the carrier pipe.Like this, this orifice plate provides outlet for blast media, and the medium that allows the gas of relatively small amount be discharged by sand-spraying pot enters carrier pipe, finally enters nozzle, sprays to workpiece at last.The pressure differential of gas is generally at 1.0 pounds/inch 2To 5.0 pounds/inch 2Between, at this moment, orifice plate has a suitable hole area, under the mode of being controlled, produces an acceptable medium flow.
Fig. 1 represents the schematic diagram according to sand blasting unit of the present invention.
Fig. 2 and Fig. 3 are the flow of medium and the relation property curve map of pressure.
In order to carry as the sub-material of this based fine particles of sodium acid carbonate with uniform flow rate, the pressure in the sand-spraying pot comprises the pressure of blast tube, and relative nozzle must determine that all the span of this pressure is generally at 20-125 pound/inch 2Between.The average-size of the particulate of described sodium acid carbonate is the 50-1000 micron, and its optimum value is about 250～300 microns.
Because sand-spraying pot is approximately identical with carrier pipe its pressure when working, therefore, in traditional abrasive blast equipment, flowing of medium controlled by the deadweight charging and by a measurement valve.We find that sand-spraying pot is very little with respect to the pressure differential of sandblast carrier pipe, and it fluctuates between positive and negative, and the result also fluctuates the flow of blast media along with the variation of pressure differential.Yet, according to the present invention, a differential manometer has been installed between carrier pipe and sand-spraying pot, it is poor to be used for direct detected pressures.By a pressure regulator, rely on the gas pressure that is provided, from 10 pounds/inch 2～125 pounds/inch 2Or the higher pressure of strictly controlling described pipe.The present invention has eliminated the cause of this changes in flow rate, has improved traditional equipment, and the control blast media is changing between about 0.5～10 Pounds Per Minute under the low discharge state, and its optimum value is 5 Pounds Per Minutes.
Be described as follows with reference to 1 couple of the present invention of figure, though the blast media of enumerating is a sodium acid carbonate,, as use saleratus, and carbonic hydroammonium, sodium chloride and other water-soluble salt are made blast media, do not exceed the present invention.
With reference to figure 1, sand blasting unit 8 comprises sand-spraying pot 10, its part blast media 12 of having packed into, and the reasonable value of the capacity of this sand-spraying pot 10 is about 6 cubic feet.On its termination, be connected to the media outlet 14 of a valve 16 controls.The control of medium typically but be not limited to orifice plate 18, this orifice plate further limits the flow of medium 12, makes its flow reach desired value.One pipeline 20 is connected in the gas (not shown) of a source of the gas or compression, and Compressed Gas is monitored by a monitor controller 22.Gas trap 24 is remote control switch valves, and control sprays to the air-flow of nozzle, opens or closes the medium stop valve.During system works, nozzle exit pressure control valve 26 utilizes monitor controller 28 to regulate the pressure of nozzle.This nozzle exit pressure control valve 26 can keep desirable nozzle exit pressure, nozzle exit pressure monitor controller 28 can make the pressure of being controlled act on the nozzle 30, the recess diameter of nozzle 30 is about 0.5 inch, the pressure that differential manometer 32 detects between sand-spraying pot 10 and the carrier pipe 34.Sand-spraying pot pressure regulator 36, its pressure is measured by pressure gauge 38, be used to provide a pressure that is higher than carrier pipe 34, and the pressure differential of being allowed detects by differential manometer 32.Being used to of being equipped with protected and the optional equipment that cools off workpiece and control dust is a water guiding tube 40, and water is introduced nozzle 30.
In service, blast media 12 is supplied with orifice plate 18 by medium efferent duct 14 and valve 16, and orifice plate 18 is adjusted to the rate-of flow in the Compressed Gas pipeline 20.The bore of orifice plate changes in 0.063～0.156 inch diameter range.In other words, the respective openings surface that is provided is a circular port, and its diameter is 0.063～0.156 inch.Use the sodium acid carbonate medium, the average-size of its particulate is about 70 microns, and corresponding orifice plate bore optimum value is about 0.125 inch, and when the average-size of particulate was 250～300 microns, corresponding orifice plate bore optimum value was about 0.156 inch.Definite force value between medium efferent duct 14 and carrier pipe 34 remains on 1 pound/inch always 2To 5 pounds/inch 2, its optimum value is about 2 pounds/inch 2To 4 pounds/inch 2Compressed gas source also infeeds gas pipeline 20, is adjusted to desired air pressure and nozzle exit pressure respectively by valve 26 and 24, and the best value of gas pressure and nozzle exit pressure is 15 pounds/inch 2To 125 pounds/inch 2Between.Sand-spraying pot pressure regulator 36 controls to the pressure at sand-spraying pot 10 tops, further guarantees the flow homogeneous and controllable of blast media 12.The pressure differential that pressure gauge differential pressure meter 32 is measured is directly proportional with the rate-of flow by orifice plate 18.Blast media, Compressed Gas and water are delivered to nozzle 30 together and are mapped to (not shown) on the work package with uniform controlled flow.
The pressure of sodium acid carbonate MEDIA FLOW is 64 pounds/inch 2, supply flow rate is 2 Pounds Per Minutes, nozzle exit pressure pound/inch 2With 200 pounds/inch of hydraulic pressure 2The time, directly spray to length and width and respectively be 2 inches, thick is the aluminium sheet that 0.032 inch lacquer is crossed, and plate is placed from 18 inches places of nozzle aperture, and the aluminium sheet paint removal was also removed all rust things with 4 minutes, and aluminium sheet is not subject to any damage.
Fig. 2 be rate-of flow from 1 Pounds Per Minute to 5 Pounds Per Minutes and pressure differential at 1 Pounds Per Minute to 5 pounds/inch 2Curve relation figure during variation.Data among the figure are that medium is a sodium acid carbonate, and the average-size of its particulate is 65 microns, and nozzle exit pressure is 60 pounds/inch 2, describe during 5/32 inch of orifice plate bore.Clearly, rate-of flow is along with the variation of pressure is linear relation.
Fig. 3 be rate-of flow (Pounds Per Minute) and pressure differential (pound/inch 2) performance diagram, make medium with sodium acid carbonate, its micron mean size is 250 microns.Illustrated that once more rate-of flow is along with the variation of pressure differential is linear.
Another advantage of this device is, when removing body surface rust thing, can spray the method for gone to disappear difference manual grinding or dissolution with solvents. Furtherly, this device can remove coating removal or other coating effectively, and it is the most effective to remove japanning or other coating of precision metallic surface of the work, the joint that comprises the weldment seam, rivet, bolt etc. are hardware similarly, needs before this special technology of separately carrying out. Native system can be controlled with robot effectively.

Claims (23)

1, a kind of sand blasting unit that is used to carry blast media, described medium comprise that the average-size of its particulate is about 50 to 1000 microns particulate, and this device comprises:
The pressure vessel that holds described blast media;
Be communicated with fluid between the compressed gas source that is used for guiding blast media and pressure vessel;
Carrier pipe is communicated with the fluid media (medium) between described compressed gas source and pressure vessel, and in this pipeline, the Compressed Gas of blast media and outflow mixes mutually.
With the nozzle that described carrier pipe is connected, the Compressed Gas of mixing and blast media are by this nozzle ejection;
Carrier pipe and pressure vessel are connected to the gas connection pipe of compressed gas source;
The efferent duct that pressure vessel is connected with carrier pipe;
Feature of the present invention is:
On efferent duct and carrier pipe, be connected with sensing device.Be used for monitoring the pressure differential between output channel and the conveyance conduit;
Described sensing device be connected with pressure-regulating device, described pressure-regulating device comprises independent pressure vessel adjusting device that is connected with gas pipeline and the line pressure adjusting device that is connected with conveyance conduit, it is a determined value that described two pressure-regulating devices are used for the pressure of pressure of pressure vessel internal pressure and carrier pipe, with the predetermined pressure differential between container and the carrier pipe that keep-ups pressure.
2, sand blasting unit according to claim 1 is characterized in that, the pressure of the efferent duct that described sensing device monitoring is connected with pressure vessel herein.
3, sand blasting unit according to claim 1 is characterized in that, the average-size of the particulate of described blast media is approximately 250 to 300 microns.
4, sand blasting unit according to claim 1 is characterized in that, described blast media is a sodium acid carbonate.
5, sand blasting unit according to claim 1 is characterized in that, described predetermined pressure differential is at 1 pound/inch 2To 5.0 pounds/inch 2Between.
6, sand blasting unit according to claim 1 is characterized in that, described predetermined pressure differential is at 2.0 pounds/inch 2To 4.0 pounds/inch 2Between.
7, sand blasting unit according to claim 1 is characterized in that, the selection of described predetermined pressure differential is can keep even by the flow of nozzle.
8, sand blasting unit according to claim 7 is characterized in that, the uniform flux of described blast media is between 0.5 Pounds Per Minute to 10.0 Pounds Per Minutes.
9, a kind of blasting method may further comprise the steps:
A certain amount of blast media is contained in the pressure vessel, and the average-size of described blast media particulate is about 50 to 1000 microns particulate;
Give described pressure vessel pressurization by the fluid that is communicated with between a described pressure vessel and the compressed gas source;
From described pressure vessel, described blast media is supplied with a carrier pipe by an efferent duct, described carrier pipe is communicated with fluid by a flue with described compressed gas source.
In described carrier pipe, described blast media mixes with the Compressed Gas that flows in this pipe;
Detect the pressure differential between described pressure vessel and the described carrier pipe;
Keep described pressure differential on a predetermined stress level promptly: the pressure that makes described pressure vessel is greater than the pressure in the described carrier pipe;
By a nozzle mixture of described blast media and described flow of the compressed gas is discharged in the end of described carrier pipe.
10, blasting method according to claim 9 is characterized in that, described predetermined pressure differential is at 1.0 pounds/inch 2To 5.0 pounds/inch 2Between.
11, blasting method according to claim 9 is characterized in that, described predetermined pressure differential is at 2.0 pounds/inch 2To 4.0 pounds/inch 2Between.
12, blasting method according to claim 9 is characterized in that, it is even by the flow of described nozzle that selected predetermined pressure differential can keep.
13, blasting method according to claim 9 is characterized in that, the average-size of the particulate of described blast media is between 250 to 300 microns.
14, blasting method according to claim 9 is characterized in that, described blast media is a sodium acid carbonate.
15, a kind of blasting method may further comprise the steps:
A certain amount of blast media is contained in the pressure vessel, and the average-size of described its particulate of blast media is 50 to 1000 microns a particle.
Give described pressure vessel pressurization by the fluid that is communicated with between a described pressure vessel and a compressed gas source,
From described pressure vessel described blast media is supplied with a carrier pipe by an efferent duct, described carrier pipe is communicated with by a flue with described compressed gas source;
The flow that will arrive the blast media of described carrier pipe is limited in 0.5 Pounds Per Minute to 10 Pounds Per Minutes by orifice plate, and this orifice plate has an area of being scheduled to and is arranged in described efferent duct;
In described carrier pipe, the Compressed Gas that flows in described blast media and this pipe is mixed;
Detect the pressure between described pressure vessel and the described carrier pipe;
Control in the described flue and described carrier pipe in pressure, the pressure differential of such stress level is provided, that is: make pressure in the described pressure vessel greater than the pressure in the described carrier pipe;
Regulate described pressure differential, be directly proportional with the flow of blast media by described orifice plate, the ratio of the blast media that provides in carrier pipe and the weight of gas is between 0.05～0.25;
By a nozzle mixture of described blast media and described flow of the compressed gas is discharged in described carrier pipe end.
16, blasting method according to claim 15 is characterized in that, the average-size of described blast media particulate is 250 to 300 microns.
17, blasting method according to claim 15 is characterized in that, described blast media comprises sodium acid carbonate, saleratus, carbonic hydroammonium, sodium chloride or their mixture.
18, blasting method according to claim 15 is characterized in that, the pressure of added Compressed Gas is greatly about 20 pounds/inch 2To 125 pounds/inch 2Between.
19, blasting method according to claim 15 is characterized in that, described pressure differential is at 1 pound/inch 2To 5 pounds/inch 2Between.
20, blasting method according to claim 19 is characterized in that, described pressure differential is at 2 pounds/inch 2To 4 pounds/inch 2Between.
21, blasting method according to claim 15 is characterized in that, the flow of the blast media by orifice plate is approximately between 0.5 Pounds Per Minute to 5 Pounds Per Minutes.
22, blasting method according to claim 15 is characterized in that, the corresponding open surface of described orifice plate is circular, and the orifice diameter that is provided is 0.063～0.156 inch.
23, blasting method according to claim 22 is characterized in that, described orifice plate is a circular port.
CN91103064A 1990-04-06 1991-04-06 Blasting apparatus Expired - Fee Related CN1027873C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US50591890A 1990-04-06 1990-04-06
US07/505,918 1990-04-06

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CN1058927A true CN1058927A (en) 1992-02-26
CN1027873C CN1027873C (en) 1995-03-15

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CN91103064A Expired - Fee Related CN1027873C (en) 1990-04-06 1991-04-06 Blasting apparatus

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EP (1) EP0523181A4 (en)
JP (1) JPH0755450B2 (en)
CN (1) CN1027873C (en)
AU (1) AU638130B2 (en)
CA (1) CA2079894A1 (en)
IL (1) IL97704A0 (en)
NZ (1) NZ237595A (en)
WO (1) WO1991015336A1 (en)
ZA (1) ZA912536B (en)

Cited By (14)

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CN1073576C (en) * 1998-03-17 2001-10-24 王金程 Method for making composite type ultrastrong water-absorption resin
CN102653077A (en) * 2010-12-10 2012-09-05 株式会社富士工程 A blasting material and a blasting method
CN102672623A (en) * 2012-05-25 2012-09-19 太仓凯鑫电子有限公司 Shot blasting polishing machine
CN103447971A (en) * 2013-09-12 2013-12-18 厦门四缘环保技术有限公司 Sand sprayer
CN104493725A (en) * 2014-11-28 2015-04-08 德清透平机械制造有限公司 Sand blasting surface treatment device
CN104924470A (en) * 2015-06-05 2015-09-23 江苏塞维斯数控科技有限公司 Slurry nozzle for multi-wire cutting machine
CN105033869A (en) * 2015-07-14 2015-11-11 浙江新工机械制造有限公司 Sand blasting apparatus used for welded workpiece
CN105712084A (en) * 2016-02-01 2016-06-29 北京理工大学 Gas pressure-driven type even powder supply device and method
CN108908137A (en) * 2018-08-22 2018-11-30 南通理工学院 A kind of hemi-closure space auxiliary sand blasting machine people
CN111249990A (en) * 2020-01-17 2020-06-09 儒众智能科技（苏州）有限公司 Enhanced dry ice formula applied to burr of middle frame of mobile phone and production process thereof
CN111843849A (en) * 2020-08-05 2020-10-30 江苏佰健环保科技有限公司 Physical clearing process and clearing system for safe and environment-friendly aircraft skin paint layer
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CN113996602A (en) * 2021-11-02 2022-02-01 东南大学 Method for cleaning drill dirt of hole channel of printed circuit board
CN114012608A (en) * 2021-11-02 2022-02-08 东南大学 Nondestructive cleaning method for corrosion on surface of copper object

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TW218852B (en) * 1992-12-23 1994-01-11 D Fraresso William Apparatus for real time ice supply to ice blasting system
CN101670562B (en) * 2009-09-15 2011-06-22 重庆大学 Online monitoring system, device and method of abrasive of high-pressure water-jet cutting machine
CN102690051A (en) * 2011-03-25 2012-09-26 海邦科技股份有限公司 Device and method for processing glass sheet material
CN105666344A (en) * 2016-02-04 2016-06-15 重庆明治百通机械制造有限公司 Sand blasting machine and sand supply system and flow control valve thereof
DE102016118081B4 (en) * 2016-09-26 2018-09-20 Ferton Holding S.A. Tooth cleaning system, powder container and insert for a powder container
JP2021186803A (en) * 2020-06-01 2021-12-13 江蘇佰健環保科技有限公司 Method of cleaning and removing non-adhesive coating of cooking utensil friendly to environment and its equipment

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1073576C (en) * 1998-03-17 2001-10-24 王金程 Method for making composite type ultrastrong water-absorption resin
CN102653077B (en) * 2010-12-10 2016-06-29 株式会社富士工程 Sand-blast material and blasting method
CN102653077A (en) * 2010-12-10 2012-09-05 株式会社富士工程 A blasting material and a blasting method
CN102672623A (en) * 2012-05-25 2012-09-19 太仓凯鑫电子有限公司 Shot blasting polishing machine
CN103447971A (en) * 2013-09-12 2013-12-18 厦门四缘环保技术有限公司 Sand sprayer
CN104493725A (en) * 2014-11-28 2015-04-08 德清透平机械制造有限公司 Sand blasting surface treatment device
CN104924470A (en) * 2015-06-05 2015-09-23 江苏塞维斯数控科技有限公司 Slurry nozzle for multi-wire cutting machine
CN105033869A (en) * 2015-07-14 2015-11-11 浙江新工机械制造有限公司 Sand blasting apparatus used for welded workpiece
CN105712084A (en) * 2016-02-01 2016-06-29 北京理工大学 Gas pressure-driven type even powder supply device and method
CN108908137A (en) * 2018-08-22 2018-11-30 南通理工学院 A kind of hemi-closure space auxiliary sand blasting machine people
CN108908137B (en) * 2018-08-22 2023-11-17 南通理工学院 Semi-closed space auxiliary sand blasting robot
CN111249990A (en) * 2020-01-17 2020-06-09 儒众智能科技（苏州）有限公司 Enhanced dry ice formula applied to burr of middle frame of mobile phone and production process thereof
CN111843849A (en) * 2020-08-05 2020-10-30 江苏佰健环保科技有限公司 Physical clearing process and clearing system for safe and environment-friendly aircraft skin paint layer
CN111843849B (en) * 2020-08-05 2022-03-01 江苏佰健环保科技有限公司 Physical clearing process and clearing system for safe and environment-friendly aircraft skin paint layer
CN113652935A (en) * 2021-08-26 2021-11-16 蔡平 Intelligent road marking removing machine
CN113996602A (en) * 2021-11-02 2022-02-01 东南大学 Method for cleaning drill dirt of hole channel of printed circuit board
CN114012608A (en) * 2021-11-02 2022-02-08 东南大学 Nondestructive cleaning method for corrosion on surface of copper object

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Publication number Publication date
EP0523181A4 (en) 1993-02-10
NZ237595A (en) 1993-09-27
JPH05507242A (en) 1993-10-21
IL97704A0 (en) 1992-06-21
AU7744691A (en) 1991-10-30
JPH0755450B2 (en) 1995-06-14
AU638130B2 (en) 1993-06-17
CN1027873C (en) 1995-03-15
EP0523181A1 (en) 1993-01-20
ZA912536B (en) 1991-12-24
WO1991015336A1 (en) 1991-10-17
CA2079894A1 (en) 1991-10-07

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