WO2002060647A1 - Feeder for cryogenic particles - Google Patents

Feeder for cryogenic particles Download PDF

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Publication number
WO2002060647A1
WO2002060647A1 PCT/NL2001/000919 NL0100919W WO02060647A1 WO 2002060647 A1 WO2002060647 A1 WO 2002060647A1 NL 0100919 W NL0100919 W NL 0100919W WO 02060647 A1 WO02060647 A1 WO 02060647A1
Authority
WO
WIPO (PCT)
Prior art keywords
feeder
feeding cylinder
cryogenic particles
treating surfaces
cryogenic
Prior art date
Application number
PCT/NL2001/000919
Other languages
French (fr)
Inventor
Huibert Konings
Original Assignee
Huibert Konings
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 Huibert Konings filed Critical Huibert Konings
Publication of WO2002060647A1 publication Critical patent/WO2002060647A1/en

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
    • 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
    • B24C7/0092—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed by mechanical means, e.g. by screw conveyors

Definitions

  • the invention concerns a feeder for metering of cryogenic particles which are used for treating surfaces.
  • Feeders of this type are known from the patent publication NL-A-1007421. This appliance has the disadvantage that metal parts are freezing and the feeding is not continue. Also is found that the friction of the feeding cylinder asks for a high torque from the drive.
  • a good working appliance is acquired.
  • Preferably modified polytetrafluoraetylene is used.
  • the feeder is foreseen with a feeding cylinder with cavities which transport the cryogenic particles from the bunker to a venturi which is formed by a conical supply and a conical discharge where within the spacing an element in the shape of a roof the cleft between supply and discharge cone enlarge or reduces.
  • the element in the shape of a roof is moved by gas pressure in the direction of the feeding cylinder.
  • Fig. 1 shows the scheme of the appliance.
  • Fig. 2 shows crossection I - 1 through the feeder partition.
  • Fig. 3 shows crossection II - II through the feeder partition.
  • Fig. 4 shows the top view without the bunker.
  • the cryogenic particles are stored in bunker (1) which is adequately isolated.
  • the cryogenic particles are feeded in feeder (2) and transported with gas which is supplied through inlet compressed gas (3) via discharge (4) to the nozzle.
  • On the inlet compressed gas (3) is a branch (5) which is connected to housing (6) and is connected with space (7).
  • feeder (2) In feeder (2) is feeding cylinder (8) with preferable 5 cavities (9) and driven by shaft (10) by a drive with variable number of revolutions per minute. Cavities (9) are in preference oblong and have the shape of a half hollow cylinder with rounded ends. Feeding cylinder (8) fits in housing (3) and is boxed up between blocks (11) and (12) which are boxed up between parts (13) and (14).
  • a plunger (18) which has a right-angled crossection and at (19) the shape of a roof.
  • the space (17) is bordered on one side by feeding cylinder (8) and roofform (19) and on the other side by conical openings (15) and (16).
  • This structure takes the form of a venturi.
  • Plunger (18) can slide axial in part (14) and block (12) and is connected via space (7) with branch (5). Plunger (18) will be pressed by gas pressure of the inlet compressed gas (3) elastic against feeding cylinder (8).
  • ln housing (3) is at (20) a chamber which is connected to open air to equalise the gas pressure in cavity (9). Feeding cylinder rotates in the direction of arrow (21).
  • Filling opening (22) is about two times wider than cavity (9) and is placed under an angle between 13 and 17 degrees in relationship with the axis of feeding cylinder (8).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention concerns a feeder for metering of cryogenic particles. The feeder is foreseen with a feeding cylinder (8) with cavities (9) which transport the cryogenic particles from the bunker (1) to a venturi which takes form by a conical supply (15) and a conical discharge (16) where in the intervening space an element in the form of a roof the cleft between supply and discharge cone enlarges or reduces. The element with the form of a roof is moved with the help of gas-pressure to the feeding cylinder.

Description

Feeder for cryogenic particles.
The invention concerns a feeder for metering of cryogenic particles which are used for treating surfaces. Feeders of this type are known from the patent publication NL-A-1007421. This appliance has the disadvantage that metal parts are freezing and the feeding is not continue. Also is found that the friction of the feeding cylinder asks for a high torque from the drive.
By using synthetic material with a low coefficient of friction and a drastic reduction of the diameter of the feeding cylinder a good working appliance is acquired. Preferably modified polytetrafluoraetylene is used. The feeder is foreseen with a feeding cylinder with cavities which transport the cryogenic particles from the bunker to a venturi which is formed by a conical supply and a conical discharge where within the spacing an element in the shape of a roof the cleft between supply and discharge cone enlarge or reduces. The element in the shape of a roof is moved by gas pressure in the direction of the feeding cylinder.
The invention will be discussed with the help of the drawing.
Fig. 1 shows the scheme of the appliance. Fig. 2 shows crossection I - 1 through the feeder partition. Fig. 3 shows crossection II - II through the feeder partition. Fig. 4 shows the top view without the bunker.
The cryogenic particles are stored in bunker (1) which is adequately isolated. The cryogenic particles are feeded in feeder (2) and transported with gas which is supplied through inlet compressed gas (3) via discharge (4) to the nozzle. On the inlet compressed gas (3) is a branch (5) which is connected to housing (6) and is connected with space (7).
In feeder (2) is feeding cylinder (8) with preferable 5 cavities (9) and driven by shaft (10) by a drive with variable number of revolutions per minute. Cavities (9) are in preference oblong and have the shape of a half hollow cylinder with rounded ends. Feeding cylinder (8) fits in housing (3) and is boxed up between blocks (11) and (12) which are boxed up between parts (13) and (14).
In block (12) are conical openings (15) and (16) near the inlet compressed gas (3) and discharge (4) which end with the smallest opening into space (17). In space (7) is a plunger (18) which has a right-angled crossection and at (19) the shape of a roof. The space (17) is bordered on one side by feeding cylinder (8) and roofform (19) and on the other side by conical openings (15) and (16). This structure takes the form of a venturi. Plunger (18) can slide axial in part (14) and block (12) and is connected via space (7) with branch (5). Plunger (18) will be pressed by gas pressure of the inlet compressed gas (3) elastic against feeding cylinder (8). ln housing (3) is at (20) a chamber which is connected to open air to equalise the gas pressure in cavity (9). Feeding cylinder rotates in the direction of arrow (21).
Filling opening (22) is about two times wider than cavity (9) and is placed under an angle between 13 and 17 degrees in relationship with the axis of feeding cylinder (8). When a cavity (9) which is filled with cryogenic particles is connected with space (17) the yet of gas from inlet pressurised gas (3) will bring cryogenic particles in whirling and drive them via roofform (19) to discharge (4).

Claims

Claims.
1. Feeder for cryogenic particles destined for treating surfaces where the particles are transported with a feeding cylinder (8) to a venturi characterised by that the venturi is shaped by a conical inlet pressured gas (15) and a conical discharge (16) and feeding cylinder (8) with cavities (9) where space (17) is varied by plunger (18) with roof form (19) where plunger (18) is pressed with compressed gas via a connection (5) with inlet compressed gas (15)
2. Feeder for cryogenic particles destined for treating surfaces as per claim 1 characterised by that the feederjs completely manufactured from a modified polytetrafuoraetylene.
3. Feeder for cryogenic particles destined for treating surfaces as per claim 1 and 2 characterised by that feeding cylinder (8) has 5 cavities (9) which have the form of a half cylinder with rounded ends.
4. Feeder for cryogenic particles destined for treating surfaces as per claim 1, 2 and 3 characterised by that filling opening is two times wider than cavity (9) and is placed under an angle between 13 and 17 degrees in relation to the axis of feeding cylinder (8).
PCT/NL2001/000919 2001-01-29 2001-12-18 Feeder for cryogenic particles WO2002060647A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1017210 2001-01-29
NL1017210A NL1017210C2 (en) 2001-01-29 2001-01-29 Cryogenic particle dosing device.

Publications (1)

Publication Number Publication Date
WO2002060647A1 true WO2002060647A1 (en) 2002-08-08

Family

ID=19772806

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2001/000919 WO2002060647A1 (en) 2001-01-29 2001-12-18 Feeder for cryogenic particles

Country Status (2)

Country Link
NL (1) NL1017210C2 (en)
WO (1) WO2002060647A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6904758B2 (en) * 2003-09-26 2005-06-14 Harsco Technologies Corporation Cryogenic vessel with an ullage space venturi assembly
EP1637282A1 (en) * 2004-09-15 2006-03-22 Alfred Kärcher GmbH & Co. KG Dry ice blasting device
WO2016144874A1 (en) * 2015-03-06 2016-09-15 Cold Jet, Llc Particle feeder
US11731243B2 (en) 2018-04-24 2023-08-22 Cold Jet, Llc Spring return actuator for rotary valves
US12036637B2 (en) 2018-04-24 2024-07-16 Cold Jet, Llc Particle blast apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2033483A (en) * 1978-10-20 1980-05-21 Toyota Motor Co Ltd Piston air valve constant suction carburettor
US4947592A (en) * 1988-08-01 1990-08-14 Cold Jet, Inc. Particle blast cleaning apparatus
NL9301237A (en) * 1993-07-14 1995-02-01 Harko Bv Method for treating surfaces with cryogenic particles
US5445553A (en) * 1993-01-22 1995-08-29 The Corporation Of Mercer University Method and system for cleaning a surface with CO2 pellets that are delivered through a temperature controlled conduit
NL1007421C2 (en) * 1997-11-03 1999-05-04 Huibert Konings Metering device for cryogenic particles.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2033483A (en) * 1978-10-20 1980-05-21 Toyota Motor Co Ltd Piston air valve constant suction carburettor
US4947592A (en) * 1988-08-01 1990-08-14 Cold Jet, Inc. Particle blast cleaning apparatus
US5445553A (en) * 1993-01-22 1995-08-29 The Corporation Of Mercer University Method and system for cleaning a surface with CO2 pellets that are delivered through a temperature controlled conduit
NL9301237A (en) * 1993-07-14 1995-02-01 Harko Bv Method for treating surfaces with cryogenic particles
NL1007421C2 (en) * 1997-11-03 1999-05-04 Huibert Konings Metering device for cryogenic particles.

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6904758B2 (en) * 2003-09-26 2005-06-14 Harsco Technologies Corporation Cryogenic vessel with an ullage space venturi assembly
US7131277B2 (en) 2003-09-26 2006-11-07 Harsco Technologies Corporation Cryogenic vessel with an ullage space venturi assembly
EP1637282A1 (en) * 2004-09-15 2006-03-22 Alfred Kärcher GmbH & Co. KG Dry ice blasting device
TWI657989B (en) * 2015-03-06 2019-05-01 美商冷卻噴射公司 Feeder assembly and method of sealing between a peripheral surface of a rotor of a feeder assembly and a surface of a lower seal
CN107820454A (en) * 2015-03-06 2018-03-20 冷喷有限责任公司 Particle feeder
JP2018514396A (en) * 2015-03-06 2018-06-07 コールド・ジェット・エルエルシーＣｏｌｄ Ｊｅｔ， ＬＬＣ Particle feeder
WO2016144874A1 (en) * 2015-03-06 2016-09-15 Cold Jet, Llc Particle feeder
US10315862B2 (en) 2015-03-06 2019-06-11 Cold Jet, Llc Particle feeder
RU2703762C2 (en) * 2015-03-06 2019-10-22 Колд Джет, Ллк Particle feed device
AU2016229994B2 (en) * 2015-03-06 2019-12-12 Cold Jet, Llc Particle feeder
AU2016229994C1 (en) * 2015-03-06 2020-05-14 Cold Jet, Llc Particle feeder
US10737890B2 (en) 2015-03-06 2020-08-11 Cold Jet, Llc Particle feeder
US11731243B2 (en) 2018-04-24 2023-08-22 Cold Jet, Llc Spring return actuator for rotary valves
US12036637B2 (en) 2018-04-24 2024-07-16 Cold Jet, Llc Particle blast apparatus

Also Published As

Publication number Publication date
NL1017210C2 (en) 2002-07-30

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