EP0045292B1 - Générateur pour produire des vibrations au moyen de la pression d'un fluide - Google Patents

Générateur pour produire des vibrations au moyen de la pression d'un fluide Download PDF

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Publication number
EP0045292B1
EP0045292B1 EP19810850128 EP81850128A EP0045292B1 EP 0045292 B1 EP0045292 B1 EP 0045292B1 EP 19810850128 EP19810850128 EP 19810850128 EP 81850128 A EP81850128 A EP 81850128A EP 0045292 B1 EP0045292 B1 EP 0045292B1
Authority
EP
European Patent Office
Prior art keywords
passage
inlet
nozzle
housing
outlet
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
EP19810850128
Other languages
German (de)
English (en)
Other versions
EP0045292A3 (en
EP0045292A2 (fr
Inventor
Charles E. Blakeslee
Ingemar Alsenfelt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KOCKUMATION AB
Original Assignee
KOCKUMATION AB
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 KOCKUMATION AB filed Critical KOCKUMATION AB
Publication of EP0045292A2 publication Critical patent/EP0045292A2/fr
Publication of EP0045292A3 publication Critical patent/EP0045292A3/en
Application granted granted Critical
Publication of EP0045292B1 publication Critical patent/EP0045292B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
    • B65D88/66—Large containers characterised by means facilitating filling or emptying preventing bridge formation using vibrating or knocking devices
    • B65D88/665—Large containers characterised by means facilitating filling or emptying preventing bridge formation using vibrating or knocking devices using a resonator, e.g. supersonic generator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid

Definitions

  • the present invention relates to a fluid operated pressure oscillation generator of the type comprising a housing forming an outlet passage and an inlet compartment surrounding the outlet passage, an annular seat formed by the housing between the outlet passage and the inlet compartment, a diaphragm and a cover detachably mounted to the housing and engaging the diaphragm at the periphery thereof to bias the diaphragm against the seat, said diaphragm forming together with the seat a valve to control a connection for operating fluid between the inlet compartment and the outlet passage.
  • the outlet passage joins a resonator, such as a resonator horn.
  • Pressure oscillation generators of this kind are used for cleaning spaces in furnaces and process apparatus as well as other similar spaces through which gases are flown such as hot flue gases from combustion processes and exhaust and waste gases from chemical processes with dust and other fine particulate material entrained therein, which tends to deposit on the surfaces of the space passed by the gas and to form a coating on such surfaces.
  • the coating forms an insulation layer on the heat exchange surfaces of the furnace or apparatus and therefore should be removed continuously or intermittently in order to maintain a high heat exchange efficiency.
  • This type of cleaning is often called "sonic cleaning".
  • the coatings which may be hard and compact and may firmly adhere to the surfaces are actuated mechanically by the air propagated pressure oscillations transmitted from the pressure oscillation generator so as to be loosened from the surfaces and fall down to the bottom of the space to be cleaned.
  • the oscillations involved may have a frequency in the audible frequency range or in the infrasonic frequency range (below about 20 cps).
  • pressure oscillation generators of the type referred to When pressure oscillation generators of the type referred to are used for sonic cleaning in the manner described they are mounted in a wall of the space to be cleaned with the resonator opening into the space to transmit the pressure oscillations thereinto, while the diaphragm housing is located on the outside of the wall. Since the generator is subject to normal wear and also may be exposed to abnormal temperature conditions due to heat radiation from the space to be cleaned, it must be serviced from time to time for maintenance and repair including replacement of wearing parts usually the diaphragm which is the most easily damaged element of the generator.
  • the primary object of the invention is to provide a fluid operated pressure oscillation generator of the type referred to wherein such back flow through the diaphragm housing is effectively prevented by providing a continuous flow of gas such as air, or other fluid through the passage inside the seat and through the resonator connected thereto, said flow being directed into the space to be cleaned, when the cover and the diaphragm are removed from the diaphragm housing, so as to hold back or impede the gas pressing from the interior of said space without interference with the service work to be done. More particularly the seat will be fully exposed and available for servicing during the supply of the fluid.
  • the invention provides a fluid operated pressure oscillation generator of the type referred to above, which has obtained the characteristics defined in claim 1.
  • the fluid operated pressure osillation generator disclosed in Fig. 1 comprises a diaphragm housing 10 which forms an annular seat 11.
  • a diaphragm 12 is biased against the seat by means of a cover 13 mounted to the housing by means of screws or bolts 14, a circumferential rib 15 on the inner side of the cover engaging the diaphragm at the periphery thereof.
  • Inside the seat 11 the housing 10 forms a central passage 16, and the passage 17 of a resonator horn 18 connected to the housing by screws 19 forms an extension of the central passage 16.
  • An annular inlet compartment 20 surrounding the seat is provided with a tube connection 21 for the supply of pressurized gas such as air to the inlet compartment.
  • the diaphragm 12 When pressurized gas is supplied to the inlet compartment 20 the diaphragm 12 in cooperation with the seat 11 controls the gas flow from the inlet compartment 20 to the central passage 16 in the housing 10 and thus to the passage 17 of the resonator horn 18 for the generation of air propagated pressure oscillations transmitted from the opening of the resonator horn 18, in a manner which is well known in the art.
  • the diaphragm housing 10 forms a further annular compartment 22 between the passage 16 and the inlet compartment 20 a partition wall 23 being connected to the housing as by welding between compartments 16 and 22.
  • a tube connection 24 is provided for the supply of pressurized air to the inner compartment 22, and this compartment has a number of outlet bores 25 opening into the passage 16. These bores converge towards a common point on the axis of the passage 16 and are directed towards the outlet end thereof, which is connected to the resonator horn.
  • the bores 25 each include an angle of the order of 25° with the axis of the passage, and they are equally spaced around the passage. The number thereof is four but any other suitable number of bores may be provided.
  • the housing must be of a specific construction including the partition wall 23, and the arrangement of such wall makes the manufacture of the housing more complicated.
  • a specifically constructed housing must be included in a fluid operated pressure oscillation generator which is to be used for sonic cleaning under the conditions described.
  • Figs. 2 to 4 disclose an embodiment including a standard diaphragm housing which has been modified in a simple manner for the purpose of the invention.
  • a tube 26 extends from the outside of the diaphragm housing 10 through the inlet compartment 20, the opposite open ends of the tube communicating with the surroundings and the passage 16, respectively.
  • the tube 26 is fixedly connected to the housing as by welding and the inner end thereof is flush with the bounding surface of the passage 16.
  • a tubular nozzle 27, Figs. 2 to 4 is inserted into the tube 26 and has a slide fit therein.
  • the nozzle shown separately in Fig. 4, has a bend 28 at the outer end thereof for connection to a source of pressurized gas such as air, or other fluid and a guide flange 29 is fixedly connected to the nozzle.
  • the closed inner end of the nozzle abuts the inside wall of the passage 16, and the portion of the nozzle extending across the passage 16 is formed with outlet bores 30, which are directed axially of the passage 16 into the passage 17 of the resonator horn 18, and outlet bores 30a which form an angle with the axis of said bore and are also directed into the passage 17 of the resonator horn.
  • An edge 31 on the guide flange 29 cooperates with a surface 32 on the diaphragm housing in order to accurately define the rotational position of the nozzle when it is inserted into the tube 26 so that the bores 30 and. 30a will be directed as described.
  • a standard diaphragm housing can easily be modified by arranging the tube 26 therein for the purpose of the invention. Since the nozzle is a separate part it can be used for servicing several generators.
  • FIG. 6 and 7 A more eleborate embodiment of the invention is shown in Figs. 6 and 7 and can be considered as a further development of the embodiment of Figs. 2 to 5.
  • the nozzle 27 comprising two tubes connected together in axial alignment, has a slide fit in a guide bore 37 in the diaphragm housing 10 between the inlet compartment 20 and the passage 16.
  • the outer end of the nozzle is closed by a plug 38, Fig. 6, and at the inner end which is also closed, bores 30 and 30a are arranged as described with reference to the embodiment of Figs. 2 to 5.
  • the nozzle extends through an inlet passage 39 communicating with the tube inlet 21 opening in the side wall of said passage.
  • One end of the passage 39 opens into the inlet compartment 20 through an opening 40, and at the other end a male connector 41 is screwed into the passage.
  • the nozzle extends through this male connector 41, and a screw gland 42 is mounted at the outer end of the connector, a packing material 43 being arranged therein.
  • a cross pin 44 mounted in the housing 10 extends through opposite elongated axial slots 45 in the nozzle in order to define the rotational position of the nozzle so that the bores 30 and 30a are maintained in the desired position.
  • a valve head 46 is fixedly connected to the nozzle and is slidable in the passage 39. In the position shown in Fig. 6 the valve head 46 engages a seat 47 formed in the passage 39 at the opening 40 in order to close the passage to the inlet compartment 20.
  • pressurized gas such as air can be supplied to the inlet passage 39 from the tube inlet 21 and will pass through the slots 45 into the nozzle 27 to be discharged in the passage 16 through the bores 30 and 30a.
  • No gas can pass through the passage 39 into the inlet compartment 20 because the communication between said passage and the inlet compartment 20 is interrupted by the valve head 46 engaging the seat 47.
  • the valve head will be biased against the seat by the pressure of the gas supplied to the inlet passage.
  • the position of the nozzle shown in Fig. 6 accordingly is that used for producing the gas curtain in the passage 16 when it is desired to remove the cover and the diaphragm (not shown in Figs. 6 and 7) as described above.
  • the nozzle 27 In the operative condition of the pressure oscillation generator the nozzle 27 is withdrawn to the position shown in Fig. 7 in which the inlet passage 39 communicates with the inlet compartment and the generator can be operated in the conventional way.
  • the slots 45 are displaced from the inlet passage and are received in the connector 41 so that no gas can pass into the nozzle through said slots.
  • the inner end of the nozzle closes the guide bore 37, so that no gas can pass into the passage 16 through the guide bore. Gas passing from the inlet compartment 20 into the nozzle through the bores 30 and 30a has no way out of the nozzle.
  • the gland 42 can be tightened in order to lock the nozzle in either position thereof, if necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (5)

1. Générateur pour produire des vibrations au moyen de la pression d'un fluide, comprenant un carter (10) délimitant un passage de sortie (16) et un compartiment d'entrée (20) entourant le passage de sortie, un siège annulaire (11) formé par le carter entre le passage de sortie et le compartiment d'entrée, un diaphragme (12) et un couvercle (13) monté de façon détachables sur le carter et s'engageant avec le diaphragme à la périphérie de celui-ci pour le presser contre le siège, ce diaphragme formant avec le siège une vanne qui contrôle une connection pour le fluide commandant entre le compartiment d'entrée et le passage de sortie, caractérisé par au moins une sortie (25, 30, 30a) pour le fluide, souvrant dans le passage de sortie (16) en s'éloignant de la face ju diaphragme (12), et des moyens (24; 27) pour amener le fluide depuis l'exterieur du carter (10) à la dite sortie.
2. Générateur selon la revendication 1, caractérisé en ce que le carter (10) forme un compartiment (22) pour l'alimentation d'un fluide gazeux entre le compartiment d'entrée (20) et le passage de sortie (16), la sortie (25) s'étendant entre le compartiment d'alimentation et le passage de sortie, et en ce que les moyens (24) pour amener le fluide à la sortie sont connectés au compartiment d'alimentation.
3. Générateur selon la revendication 1, caractérisé en ce que les moyens pour amener le fluide à la sortie (30, 30a) comprennent une buse (27) et des moyens (26; 37, 39, 46) pour monter la buse pour lui permettre un déplacement axial à travers le carter (10) et ayant une de ses extrémités à l'extérieur du carter, la sortie (30, 30a) étant disposée dans une partie de la buse adjacente à l'autre extrémité de celle-ci de façon à être ajustable, par déplacement de la buse, entre des positions situées à l'intérieur et à l'extérieur du passage de sortie (16), respectivement.
4. Générateur selon la revendication 3, caractérisé par un tube de guidage (26) dans le carter (10), qui s'étend entre l'extérieur du carter et le passage de sortie (16) selon une direction transversale du passage de sortie, la buse (27) pouvant glisser à travers le tube de guidage.
5. Générateur selon la revendication 3, caractérisé par un passage d'entrée (39) pour le fluide gazeux en communication avec le compartiment d'entrée (20), un siège (47) de valve formé dans le passage d'entrée entre celui-ci et le compartiment d'entrée, la buse (27) s'étendant à travers le passage d'entrée et le compartiment d'entrée depuis l'extérieur du carter (10) dans le passage de sortie (16), une ouverture d'entrée (45) formée dans la buse, en un élément (46) de valve sur la buse, qui coopère avec le siège de valve, la buse étant déplaçable entre une première position où l'ouverture d'entrée communique avec le passage d'entrée et où la communication entre le passage d'entrée et le compartiment d'entrée est interrompu par l'élément de valve s'engageant dans le siège, et une autre position où la communication est ouverte et l'ouverture d'entrée est retirée du passage d'entrée.
EP19810850128 1980-07-25 1981-07-23 Générateur pour produire des vibrations au moyen de la pression d'un fluide Expired EP0045292B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17222180A 1980-07-25 1980-07-25
US172221 1980-07-25

Publications (3)

Publication Number Publication Date
EP0045292A2 EP0045292A2 (fr) 1982-02-03
EP0045292A3 EP0045292A3 (en) 1982-02-10
EP0045292B1 true EP0045292B1 (fr) 1984-05-30

Family

ID=22626810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810850128 Expired EP0045292B1 (fr) 1980-07-25 1981-07-23 Générateur pour produire des vibrations au moyen de la pression d'un fluide

Country Status (4)

Country Link
EP (1) EP0045292B1 (fr)
JP (1) JPH0249792B2 (fr)
CA (1) CA1178708A (fr)
DE (1) DE3163878D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE451115B (sv) * 1985-01-16 1987-09-07 Ulveco Kockum Sonic Ab Anleggning for sotning av pannor eller liknande, innefattande ett flertal lagfrekvent ljud alstrande anordningar
US4642833A (en) * 1985-03-14 1987-02-17 Coxwold (Proprietary) Limited Valve assembly
FI972252A (fi) * 1997-05-28 1998-11-29 Ulf Krogars Menetelmä ja laitteisto akustiseen puhdistukseen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2804042A (en) * 1954-03-02 1957-08-27 Centre Nat Rech Scient Apparatus for producing high-powered sounds and ultra-sounds
CH376747A (de) * 1960-01-05 1964-04-15 Lennart Schoeberg Boerje Mundstück für Spanblaspistolen
SE445788B (sv) * 1979-06-11 1986-07-14 Kockumation Ab Sett och anordning vid en gasdriven trycksvengningsalstrare av membranventiltyp

Also Published As

Publication number Publication date
EP0045292A3 (en) 1982-02-10
JPH0249792B2 (ja) 1990-10-31
CA1178708A (fr) 1984-11-27
EP0045292A2 (fr) 1982-02-03
DE3163878D1 (en) 1984-07-05
JPS57122974A (en) 1982-07-31

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