US2953411A - Apparatus for gas borne powder distribution - Google Patents

Apparatus for gas borne powder distribution Download PDF

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Publication number
US2953411A
US2953411A US607656A US60765656A US2953411A US 2953411 A US2953411 A US 2953411A US 607656 A US607656 A US 607656A US 60765656 A US60765656 A US 60765656A US 2953411 A US2953411 A US 2953411A
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United States
Prior art keywords
gas
powder
pinch
stream
injector
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Expired - Lifetime
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US607656A
Inventor
Byron H Acomb
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Union Carbide Corp
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Union Carbide Corp
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Priority to US607656A priority Critical patent/US2953411A/en
Priority to ES0237257A priority patent/ES237257A1/en
Priority to US77903258 priority patent/US2986160A/en
Application granted granted Critical
Publication of US2953411A publication Critical patent/US2953411A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying 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
    • B05B7/1404—Arrangements for supplying particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K7/00—Cutting, scarfing, or desurfacing by applying flames
    • B23K7/08—Cutting, scarfing, or desurfacing by applying flames by applying additional compounds or means favouring the cutting, scarfing, or desurfacing procedure
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/365—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a diaphragm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/02—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm
    • F16K7/04—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by external radial force
    • F16K7/06—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by external radial force by means of a screw-spindle, cam, or other mechanical means

Definitions

  • This invention relates to apparatus for gas borne powder distribution employing pinch valves, and more particularly employing diaphragm operated valves of this character for turning on and oif the flow of powder-laden gas used, for example, in electric welding and in the thermochemical removal or deposition of metal.
  • the main objects of the present invention are to provide apparatus employing a valve of this character which can be operated by the conveying gas, thereby eliminating the necessity of a separate gas source, and to maintain a pressure difierential between the chamber and conveying tube so that the tube can withstand pressures in excess of the bursting limit of the material thereof.
  • a stream of gas is passed along a first circumferentially confined path, powder is aspirated into said path to form a gas borne powder stream which is passed along a flexibly confined further path.
  • the stream of compressed gas is diverted from ahead of said aspiration step to a confined zone surrounding said confined path, and the pressure of said diverted compressed gas in said confined zone is utilized to pinch said flexibly confined path and cut off the flow of said gas borne powder therethrough.
  • Fig. 1 is a diagram or flow sheet for the method of powder distribution according to the present invention, showing the injector and by-pass, with the pinch valve open;
  • Fig. 2 is a similar diagram with the pinch valve closed.
  • a stream of compressed gas is passed along a first circumferentially confined path 37. Powder is aspirated into this path at 39 to form a gas borne powder stream.
  • the gas borne powder stream is passed along a. flexibly circumferentially confined further path 30.
  • the stream of compressed gas is diverted at 36 from said first path 37 ahead of the aspiration step at 39 to a confined zone '10 surrounding the flexibly confined path 30.
  • the pressure of the diverted gas is utilized in the confined zone to pinch the path 30 and cut off the flow of gas borne powder therethrough.
  • the body 10 is provided with a by-pass 35 for pressurizing the chamber under the diaphragm 14 and surrounding the pinch tube 30.
  • the by-pass 35 is connected to a two-way valve 36, preferably solenoid operated.
  • the valve 36 is connected to a supply line 37, and through a check valve 38 and injector 39 to the pinch tube 30.
  • the pinch valve When the pinch valve is in its normally open position shown in Fig. 1, the loading of the spring 15 on the diaphragm 14 depresses the pinching arm 22 so that the pinch tube 30 is wide open.
  • the carrier gas from the supply line 37 passes through the valve 36 and check valve 38 to the injector 39 where it picks up the powder and carries it through the open pinch tube 30 for delivery and use.
  • valve 36 is turned to the position shown in Fig. 2.
  • the carrier gas from the supply 37 passes through the valve 36 and 35 to the pinch valve chamber in the body 10.
  • the gas pressure against the diaphragm 14 is sufficient to overcome the loading of the spring 15 and the pinching arm is raised, thus compressing the pinch tube 30 between the roller 25 and the yoke 28.
  • Apparatus for gas borne powder distribution which comprises a supply conduit for a stream of compressed gas, a two-way valve in said conduit operable in one position for passing said stream through an injector to entrain powder therein, an outlet conduit from said injector for passing said gas borne powder stream through a pinch tube, a diaphragm having means connected thereto for pinching said tube, a second conduit forming a bypass from said two-way valve to said diaphragm, said valve being operable in a second position for cutting ofl. said stream of compressed gas to prevent it going through said injector, but instead directing it through said second conduit to said diaphragm to cause said pinching means connected thereto to pinch said tube and cut off the flow of said gas borne powder.
  • Apparatus for gas borne powder distribution which comprises means for passing carrier gas from a supply line to a powder injector to entrain powder therein, means for passing the gas borne powder stream through a pinch tube to a delivery line, means for by-passing carrier gas from said supply line ahead of said injector to a pressure chamber, and means for pinching said tube in response to pressure in said chamber to decrease the flow in said gas borne powder delivery line.
  • Apparatus for gas-borne powder distribution which comprises means for passing a non-powder laden stream of compressed gas from a supply line along a predetermined path and through an injector to entrain powder therein, means for passing the gas-borne powder stream from said injector through the tube of a diaphragm-operated pinch valve, means for discontinuing the flow of said non-powder laden compressed gas from said supply line to said injector at a point ahead of said injector before said compressed gas can become powder entrained, means for simultaneously diverting said stream of non-powder laden compressed gas from said supply line along a different path away from said injector, and means for recontinuing said stream of non-powder entrained gas from said supply line along said difierent path and directing it to the diaphragm of said pinch valve to cut oil the flow of said gas-home powder.
  • Apparatus for gas-bome powder distribution which comprises means for passing carrier gas from a supply line to a powder injector to entrain powder therein, means for passing said carrier gas from said injector through a pinch tube to a delivery line, means for by-passing carrier gas from one of said lines to a pressure chamber, and means for pinching said tube in response to pressure in said chamber to decrease the flow in said delivery line.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Nozzles (AREA)

Description

Sept. 20, 1960 B. H. ACOMB APPARATUS FOR GAS some: POWDER DISTRIBUTION Filed Sept. 4, 1956 INVENTOR. BYRON H. ACOMB ATTORNEY United States Patent APPARATUS FOR GAS BORNE POWDER DISTRIBUTION Byron H. Acomb, Watchung, N.J., assignor to Union Carbide Corporation, a corporation of New York Filed Sept. 4, 1956, Ser. No. 607,656
4 Claims. (Cl. 302-17) This invention relates to apparatus for gas borne powder distribution employing pinch valves, and more particularly employing diaphragm operated valves of this character for turning on and oif the flow of powder-laden gas used, for example, in electric welding and in the thermochemical removal or deposition of metal.
The main objects of the present invention are to provide apparatus employing a valve of this character which can be operated by the conveying gas, thereby eliminating the necessity of a separate gas source, and to maintain a pressure difierential between the chamber and conveying tube so that the tube can withstand pressures in excess of the bursting limit of the material thereof.
Other objects are to provide apparatus employing a valve of this character to turn on the flow of carrier gas before turning on the flow of powder, and for turning ofi the flow of powder While continuing the How of carrier gas. According to the present invention, a stream of gas is passed along a first circumferentially confined path, powder is aspirated into said path to form a gas borne powder stream which is passed along a flexibly confined further path. The stream of compressed gas is diverted from ahead of said aspiration step to a confined zone surrounding said confined path, and the pressure of said diverted compressed gas in said confined zone is utilized to pinch said flexibly confined path and cut off the flow of said gas borne powder therethrough.
In the drawings:
Fig. 1 is a diagram or flow sheet for the method of powder distribution according to the present invention, showing the injector and by-pass, with the pinch valve open; and
Fig. 2 is a similar diagram with the pinch valve closed.
As shown in the drawing, a stream of compressed gas is passed along a first circumferentially confined path 37. Powder is aspirated into this path at 39 to form a gas borne powder stream. The gas borne powder stream is passed along a. flexibly circumferentially confined further path 30. The stream of compressed gas is diverted at 36 from said first path 37 ahead of the aspiration step at 39 to a confined zone '10 surrounding the flexibly confined path 30. The pressure of the diverted gas is utilized in the confined zone to pinch the path 30 and cut off the flow of gas borne powder therethrough.
The body 10 is provided with a by-pass 35 for pressurizing the chamber under the diaphragm 14 and surrounding the pinch tube 30. As shown in Figs. 1 and 2 the by-pass 35 is connected to a two-way valve 36, preferably solenoid operated. The valve 36 is connected to a supply line 37, and through a check valve 38 and injector 39 to the pinch tube 30.
When the pinch valve is in its normally open position shown in Fig. 1, the loading of the spring 15 on the diaphragm 14 depresses the pinching arm 22 so that the pinch tube 30 is wide open. The carrier gas from the supply line 37 passes through the valve 36 and check valve 38 to the injector 39 where it picks up the powder and carries it through the open pinch tube 30 for delivery and use.
2,953,411 Patented Sept. 20, 1960 "ice To close off the pinch valve 30, the valve 36 is turned to the position shown in Fig. 2. The carrier gas from the supply 37 passes through the valve 36 and 35 to the pinch valve chamber in the body 10. The gas pressure against the diaphragm 14 is sufficient to overcome the loading of the spring 15 and the pinching arm is raised, thus compressing the pinch tube 30 between the roller 25 and the yoke 28.
What is claimed is:
1. Apparatus for gas borne powder distribution which comprises a supply conduit for a stream of compressed gas, a two-way valve in said conduit operable in one position for passing said stream through an injector to entrain powder therein, an outlet conduit from said injector for passing said gas borne powder stream through a pinch tube, a diaphragm having means connected thereto for pinching said tube, a second conduit forming a bypass from said two-way valve to said diaphragm, said valve being operable in a second position for cutting ofl. said stream of compressed gas to prevent it going through said injector, but instead directing it through said second conduit to said diaphragm to cause said pinching means connected thereto to pinch said tube and cut off the flow of said gas borne powder.
2. Apparatus for gas borne powder distribution which comprises means for passing carrier gas from a supply line to a powder injector to entrain powder therein, means for passing the gas borne powder stream through a pinch tube to a delivery line, means for by-passing carrier gas from said supply line ahead of said injector to a pressure chamber, and means for pinching said tube in response to pressure in said chamber to decrease the flow in said gas borne powder delivery line.
3. Apparatus for gas-borne powder distribution which comprises means for passing a non-powder laden stream of compressed gas from a supply line along a predetermined path and through an injector to entrain powder therein, means for passing the gas-borne powder stream from said injector through the tube of a diaphragm-operated pinch valve, means for discontinuing the flow of said non-powder laden compressed gas from said supply line to said injector at a point ahead of said injector before said compressed gas can become powder entrained, means for simultaneously diverting said stream of non-powder laden compressed gas from said supply line along a different path away from said injector, and means for recontinuing said stream of non-powder entrained gas from said supply line along said difierent path and directing it to the diaphragm of said pinch valve to cut oil the flow of said gas-home powder.
4. Apparatus for gas-bome powder distribution which comprises means for passing carrier gas from a supply line to a powder injector to entrain powder therein, means for passing said carrier gas from said injector through a pinch tube to a delivery line, means for by-passing carrier gas from one of said lines to a pressure chamber, and means for pinching said tube in response to pressure in said chamber to decrease the flow in said delivery line.
References Cited in the file of this patent UNITED STATES PATENTS 1,123,155 Woodley Dec. 29, 1914 1,223,586 Johnson Apr. 24, 1917 2,183,835 Foulke Dec. 19, 1939 2,588,212 Custer Mar. 4, 1952 2,590,215 Sausa Mar. 25, 1952 2,590,396 Garretson Mar. 25, 1952 2,649,340 Weinrich Aug. 18, 1953 2,816,803 Clark Dec. 17, 1957 FOREIGN PATENTS 208.801 Switzerland 194g
US607656A 1956-09-04 1956-09-04 Apparatus for gas borne powder distribution Expired - Lifetime US2953411A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US607656A US2953411A (en) 1956-09-04 1956-09-04 Apparatus for gas borne powder distribution
ES0237257A ES237257A1 (en) 1956-09-04 1957-08-23 Apparatus for gas borne powder distribution
US77903258 US2986160A (en) 1956-09-04 1958-12-08 Pinch valves

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US607656A US2953411A (en) 1956-09-04 1956-09-04 Apparatus for gas borne powder distribution

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1176010B (en) * 1961-01-05 1964-08-13 Daimler Benz Ag Device to prevent the vehicle wheels from locking up

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1123155A (en) * 1911-04-15 1914-12-29 Whitford W Woodley Art of dust-handling.
US1223586A (en) * 1916-08-22 1917-04-24 Pittsburgh Plate Glass Co Cement-gun apparatus.
US2183835A (en) * 1938-02-25 1939-12-19 Du Pont Valve
CH208807A (en) * 1939-03-11 1940-02-29 Jules Schloer Aktiengesellscha Automatic regulator responsive to pressure changes.
US2588212A (en) * 1948-10-28 1952-03-04 Ansul Chemical Co Fluid pressure actuated tube compressor
US2590215A (en) * 1947-02-21 1952-03-25 Frank C Sausa Variable throat restricter valve
US2590396A (en) * 1945-12-26 1952-03-25 Phillips Petroleum Co Regulator
US2649340A (en) * 1950-06-14 1953-08-18 Houdry Process Corp Operation procedure for gas lifts
US2816803A (en) * 1954-11-15 1957-12-17 Union Oil Co Conveyance of granular solids

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1123155A (en) * 1911-04-15 1914-12-29 Whitford W Woodley Art of dust-handling.
US1223586A (en) * 1916-08-22 1917-04-24 Pittsburgh Plate Glass Co Cement-gun apparatus.
US2183835A (en) * 1938-02-25 1939-12-19 Du Pont Valve
CH208807A (en) * 1939-03-11 1940-02-29 Jules Schloer Aktiengesellscha Automatic regulator responsive to pressure changes.
US2590396A (en) * 1945-12-26 1952-03-25 Phillips Petroleum Co Regulator
US2590215A (en) * 1947-02-21 1952-03-25 Frank C Sausa Variable throat restricter valve
US2588212A (en) * 1948-10-28 1952-03-04 Ansul Chemical Co Fluid pressure actuated tube compressor
US2649340A (en) * 1950-06-14 1953-08-18 Houdry Process Corp Operation procedure for gas lifts
US2816803A (en) * 1954-11-15 1957-12-17 Union Oil Co Conveyance of granular solids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1176010B (en) * 1961-01-05 1964-08-13 Daimler Benz Ag Device to prevent the vehicle wheels from locking up

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ES237257A1 (en) 1958-03-01

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