EP0694367A1 - Schleuderstrahlgerät zur Fernsteuerung - Google Patents

Schleuderstrahlgerät zur Fernsteuerung Download PDF

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Publication number
EP0694367A1
EP0694367A1 EP95440047A EP95440047A EP0694367A1 EP 0694367 A1 EP0694367 A1 EP 0694367A1 EP 95440047 A EP95440047 A EP 95440047A EP 95440047 A EP95440047 A EP 95440047A EP 0694367 A1 EP0694367 A1 EP 0694367A1
Authority
EP
European Patent Office
Prior art keywords
sand
machine according
valve
needle
sandblasting machine
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.)
Granted
Application number
EP95440047A
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English (en)
French (fr)
Other versions
EP0694367B1 (de
Inventor
Maurice Kegler
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.)
Kegler Maurice
Original Assignee
KEGLER Maurice GARAGE ET SABLAGE INDUSTRIEL
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 KEGLER Maurice GARAGE ET SABLAGE INDUSTRIEL filed Critical KEGLER Maurice GARAGE ET SABLAGE INDUSTRIEL
Publication of EP0694367A1 publication Critical patent/EP0694367A1/de
Application granted granted Critical
Publication of EP0694367B1 publication Critical patent/EP0694367B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B24C7/0069—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 means for preventing clogging of the equipment or for preventing abrasive entering the airway

Definitions

  • the present invention relates to a sandblasting machine comprising a tank containing sand, provided with a loading mouth in its upper part and an outlet mouth equipped with a valve in its lower part, a controlled compressed air supply in synchronism with said valve, a sandblasting lance connected to the outlet mouth by a connector, and means for controlling circuits for supplying sand and compressed air.
  • Known mobile sandblasting machines used in particular for sanding building facades, boat hulls, vehicle bodies, generally have a capacity of 50 to 500 kg of sand and depending on the size of the site must be refilled with bags 50 kg sand poured manually into the machine tank.
  • they require the presence of two operators, one of which is generally placed high on a scaffolding and carrying out sandblasting using the sandblasting lance equipped with a safety handle, for example of the type "dead man", and the other remaining permanently near the machine to, on the one hand, act manually on the outlet valve of the tank in order to regulate the sand flow according to the needs of the first operator, and on the other hand, replenish the machine with sand.
  • European publication No. 0 218 869 describes a machine for sandblasting equipped with a flow regulation device comprising a worm screw located between the sand outlet valve and the sandblasting lance. As this machine does not seem to be used concretely on construction sites, it can be assumed that the flow control system is subject to significant wear problems, in particular due to abrasion under pressure operated by the sand.
  • the present invention proposes to overcome the drawbacks mentioned above by providing a remote controlled sandblasting machine.
  • this machine can offer a working capacity, that is to say an autonomy in sand, much greater than that of current machines, which considerably increases its profitability.
  • a sandblasting machine as defined in the preamble and characterized in that it comprises means for adjusting the sand flow rate and automatic uncorking means, these means being arranged in said fitting.
  • the means for adjusting the flow rate comprise at least one mobile element cooperating with a fixed element to vary the diameter of passage of the sand and a control device for this mobile element.
  • the fixed element may comprise two opposite flanges, arranged symmetrically with respect to the axis of the outlet mouth, these flanges being of trapezoidal section, and arranged to define between them a zone of narrowing followed by a zone of relaxation corresponding to passage of sand.
  • the movable element advantageously comprises a needle arranged in the axis of the outlet mouth, this needle being provided with a conical head housed in said expansion zone, and a rod slidably mounted in said fitting.
  • the control device comprises an electric or pneumatic motor controlled by an inverter relay and arranged to move an endless screw in translation parallel to the axis of the outlet mouth, and a first arm of a lever arranged to transmit moving the screw to said needle.
  • This first arm of the lever is advantageously connected on the one hand with a needle by a first articulation and on the other hand with the worm by a second articulation.
  • the unblocking means comprise at least said movable element arranged to release the expansion zone and a device for controlling the unclogging acting on this movable element.
  • the uncorking control device may comprise at least one double-acting cylinder provided with a rod arranged to move in translation parallel to the axis of the outlet orifice, a second arm of the lever arranged to transmit the displacement of the needle rod, and means for actuating said cylinder.
  • the second arm of the lever is advantageously connected on the one hand to a needle by said first articulation and on the other hand to the rod of the jack by a third articulation.
  • the unblocking means further comprise a pneumatic circuit controlled by a solenoid valve or a pneumatic valve and arranged to send compressed air between the outlet mouth and the narrowing zone.
  • the means for supplying said jack may comprise a pneumatic control circuit controlled by a two-way solenoid valve, arranged to automatically put the needle in the unclogging position when the machine stops and in the adjustment position when the machine starts. .
  • the solenoid valve is advantageously arranged to simultaneously supply said cylinder and the sand valve by means of a double-acting cylinder.
  • control buttons of the actuating means are centralized in a remote control unit.
  • the machine comprises a tank 1 filled with sand provided with an outlet mouth 2 equipped with a valve 3, hereinafter called sand valve, which is generally a butterfly type valve and which is mounted between two protective flanges 4 against abrasion.
  • sand valve which is generally a butterfly type valve and which is mounted between two protective flanges 4 against abrasion.
  • the control of this sand valve by means of a double-acting cylinder will be described later.
  • the flow adjustment device comprises two opposite flanges 7 arranged symmetrically with respect to the axis of the outlet mouth 2, of trapezoidal section, defining between them a narrowing zone 7a followed by an expansion zone 7b of the sand flow , a needle 8 provided with a rod 8a and a conical head 8b, located in the axis of the outlet mouth 2.
  • This conical head 8b being housed in said expansion zone 7b, thus defining the passage diameter of the sand.
  • the rod 8a of the needle is sliding in a bearing 9 provided at the low point of the connector 5.
  • the outer end of this rod is articulated in the middle part of a lever 10 in the form of a V at point 10a.
  • the first end 10b of this lever 10 is articulated to an endless screw 11, movable in translation along its axis, which is parallel to the axis of the outlet mouth 2 and therefore parallel to that of the needle 8. Its movement of translation is controlled by an electric motor 12, a speed reduction gear 13 and a nut 14 movable in rotation provided in a fixed frame 15 and cooperating with said screw 11.
  • This device makes it possible to adjust the flow of sand. Indeed, the rotation of the motor 12 in one direction or the other causes a rectilinear displacement of the screw 11 upwards or downwards, making the lever 10 pivot around its second end 10c, thus generating a rectilinear displacement of the needle 8 in the same direction as that of the screw.
  • the passage diameter of the sand can be increased or reduced, thereby increasing or reducing its flow.
  • This motor 12 can be easily controlled remotely by the operator performing the sanding.
  • the automatic uncorking device uses, in part, the adjustment device described above.
  • the second end 10c of the lever 10 is articulated to the rod 16 of a double-acting cylinder 17. This the latter is mounted on the fixed frame 15. This assembly makes it possible to automatically unblock the sand passage area.
  • the jack 17 is in the high position and does not act on the lever 10 or on the needle 8.
  • the jack 17 moves to the low position, causing rotation lever 10 around its first end 10b, which lowers the needle 8 in the low position, thereby freeing the passage of sand, and at the same time any blocks of agglomerated sand.
  • This jack 17 is controlled automatically, as will be seen later.
  • the pneumatic circuits are supplied by a compressor (not shown).
  • a pressure relief valve 18 supplies the first four circuits.
  • the pneumatic circuit for pressurizing the sand tank 1 comprises a first pipe 19, pressurized as soon as the compressor valve opens, which sends the compressed air to the upper part of the tank 1, triggering the closure automatic loading mouth 20 of the tank by means of a cone safety device 21. Under the effect of the pressure build-up in the tank 1, this cone 21 automatically closes the mouth 20 via of a seal 22.
  • the tank 1 is thus pressurized to facilitate the exit of the sand through the outlet mouth 2 located in its lower part.
  • This pipe 19 includes a non-return valve 23 to keep the tank under pressure, and a drain 24 to depressurize it at the end of work.
  • the pneumatic circuit intended to create the sand / air mixture used for sandblasting comprises a second pipe 25 which sends, through the opening of a valve 26, hereinafter called the air valve, the compressed air in the connection 5 between the outlet mouth 2 and the sandblasting lance 6.
  • This air valve 26 is directly coupled to the latter by its control axis (not shown) and controlled at the same time as the sand valve 3.
  • This pipe 25 is protected by a non-return valve 27 avoiding the risk of damage to the upstream circuit by the sand.
  • the pneumatic dedusting circuit comprises a third pipe 28, placed as a bypass on the second and thus short-circuiting the air valve 26. It comprises a solenoid valve 29 and makes it possible to supply air to the sandblasting lance 6 to carry out dedusting .
  • the pneumatic unclogging circuit comprises a fourth pipe 30, equipped with a solenoid valve 31, which sends the air between the sand valve 3 and the needle 8 thus allowing the unclogging of this zone.
  • the aim is to generate sufficient pressure for actuating the jacks 17, 33.
  • This circuit 32 is supplied with air as soon as the compressor valve opens. It comprises an electrical contact pressure gauge 34, a non-return valve 35, a reserve of compressed air 36 and a solenoid valve 37 actuated by a coil 38 and a return spring 39.
  • This solenoid valve 37 simultaneously supplies the unblocking cylinder 17 and the cylinder 33 of the sand valve 3.
  • the air reserve 36 is a safety device which makes it possible to supply the solenoid valve 37 in the event of a break in the air supply, following a compressor failure or a line break.
  • the electric control circuit 40 supplied with low voltage by a 12 or 24 V battery 41 comprises a fuse 42, an emergency stop button 43 placed on the sandblasting machine, a remote control placed on the lance for sandblasting called "dead man" handle 44. In this way, during use, the operator must maintain manual pressure on this handle.
  • This electrical circuit 40 further comprises the coil 38 of the solenoid valve 37 and an earth connection 45. In order to avoid the risks of energizing when the pneumatic circuits are not supplied with compressed air, this electrical circuit 40 passes by the electrical contact pressure gauge 34 of the pneumatic control circuit 32, which authorizes the closing of the electrical circuit 40 only if the latter is supplied with air.
  • the electric motor 12 of the flow control device is supplied by a remote controlled electric change-over relay (not shown).
  • the compressor valve When the blasting machine is started, the compressor valve is open, the tank 1 is automatically pressurized and the pneumatic control circuit 32 is supplied.
  • the operator ready to sand activates his "dead man" handle 44 energizing the electric circuit 40, which actuates the solenoid valve 37 supplying the jacks 17, 33 via circuit B.
  • the needle 8 then moves to the high adjusted position of work and the sand valve 3 opens, simultaneously opening air valve 26. Sandblasting can be carried out.
  • the operator can adjust the sand flow by controlling, from its housing, the rotation in one direction or the other of the adjustment motor 12.
  • the electric circuit 40 opens and the solenoid valve 37 which is no longer supplied returns to its rest position by its return spring 39, thus supplying the jacks 17, 33 via circuit A
  • the needle 8 then goes into the low rest position and the sand valve 3 closes, simultaneously closing the air valve 26.
  • the operator can then operate, from its housing, the uncapping solenoid valve 31, cleaning the passage between the sand valve 3 and the needle 8, then the dedusting solenoid valve 29 if he wishes to clean his environment and his work surface.
  • the needle 8 Upon restart, the needle 8 automatically returns to its last working position, delivering the same flow of sand. There is no disruption.
  • the sandblasting machine according to the invention achieves the aims mentioned. It is equipped with safety devices which makes it even more reliable to use.
  • the air reserve 36 makes it possible to supply the jacks 17, 33 to close the sand valve 3 and put the needle 8 in the low rest position, that is to say - say in the unclogging position.
  • this sandblasting machine allows a single person to work on a site, safely and with maximum efficiency. It is easily transportable by a truck and can be used as a stationary or mobile. Its large sand storage capacity allows it to load loose sand allowing significant savings compared to 50 kg sandbags. All of these parameters considerably increase the profitability of such a machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Centrifugal Separators (AREA)
  • Nozzles (AREA)
  • Road Repair (AREA)
  • Disintegrating Or Milling (AREA)
  • Massaging Devices (AREA)
  • Casting Devices For Molds (AREA)
EP95440047A 1994-07-26 1995-07-25 Schleuderstrahlgerät zur Fernsteuerung Expired - Lifetime EP0694367B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9409396A FR2723020B1 (fr) 1994-07-26 1994-07-26 Machine de sablage a commande a distance
FR9409396 1994-07-26

Publications (2)

Publication Number Publication Date
EP0694367A1 true EP0694367A1 (de) 1996-01-31
EP0694367B1 EP0694367B1 (de) 1999-06-30

Family

ID=9465869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95440047A Expired - Lifetime EP0694367B1 (de) 1994-07-26 1995-07-25 Schleuderstrahlgerät zur Fernsteuerung

Country Status (5)

Country Link
EP (1) EP0694367B1 (de)
AT (1) ATE181690T1 (de)
DE (1) DE69510507T2 (de)
ES (1) ES2136820T3 (de)
FR (1) FR2723020B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950469A2 (de) * 1998-04-16 1999-10-20 Kjell Rickling Sandstrahlventil
CN101972993A (zh) * 2010-04-02 2011-02-16 无锡华联精工机械有限公司 抛丸清理设备中的丸料供给机构

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013005237U1 (de) * 2013-06-03 2013-07-12 Terex Cranes Germany Gmbh Nachlaufsteuerung für einen Strahlschlauch

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE564656A (de) *
US2753664A (en) * 1953-04-20 1956-07-10 Pangborn Corp Abrasive blasting system
CH397462A (de) * 1962-11-17 1965-08-15 Vacu Blast Ltd Sandstrahlgebläse
US3893262A (en) * 1974-05-15 1975-07-08 Fruehauf Corp Particulate transfer control device
US4075789A (en) * 1976-07-19 1978-02-28 Dremann George H Abrasive blast system having a modulation function
JPS54122491A (en) * 1978-03-15 1979-09-22 Ishikawajima Harima Heavy Ind Co Ltd Sandblast device
EP0061756A1 (de) * 1981-04-01 1982-10-06 GKSS-Forschungszentrum Geesthacht GmbH Vorrichtung zur Oberflächenbehandlung von Bauwerken und Schiffen
WO1986004288A1 (en) * 1985-01-29 1986-07-31 Hollosi Ferenc Method and device for scattering grains
EP0218869A1 (de) 1985-09-20 1987-04-22 SCHLICK-Roto-Jet Maschinenbau GmbH Vorrichtung zum gleichmässigen Dosieren von körnigem Strahlmittel bei pneumatisch arbeitenden Strahlmittelanlagen
US4862649A (en) * 1986-08-28 1989-09-05 Ltv Aerospace & Defense Co. Material transfer system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE564656A (de) *
US2753664A (en) * 1953-04-20 1956-07-10 Pangborn Corp Abrasive blasting system
CH397462A (de) * 1962-11-17 1965-08-15 Vacu Blast Ltd Sandstrahlgebläse
US3893262A (en) * 1974-05-15 1975-07-08 Fruehauf Corp Particulate transfer control device
US4075789A (en) * 1976-07-19 1978-02-28 Dremann George H Abrasive blast system having a modulation function
JPS54122491A (en) * 1978-03-15 1979-09-22 Ishikawajima Harima Heavy Ind Co Ltd Sandblast device
EP0061756A1 (de) * 1981-04-01 1982-10-06 GKSS-Forschungszentrum Geesthacht GmbH Vorrichtung zur Oberflächenbehandlung von Bauwerken und Schiffen
WO1986004288A1 (en) * 1985-01-29 1986-07-31 Hollosi Ferenc Method and device for scattering grains
EP0218869A1 (de) 1985-09-20 1987-04-22 SCHLICK-Roto-Jet Maschinenbau GmbH Vorrichtung zum gleichmässigen Dosieren von körnigem Strahlmittel bei pneumatisch arbeitenden Strahlmittelanlagen
US4862649A (en) * 1986-08-28 1989-09-05 Ltv Aerospace & Defense Co. Material transfer system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 3, no. 148 (M - 83) 7 December 1979 (1979-12-07) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950469A2 (de) * 1998-04-16 1999-10-20 Kjell Rickling Sandstrahlventil
EP0950469A3 (de) * 1998-04-16 2000-03-08 Kjell Rickling Sandstrahlventil
CN101972993A (zh) * 2010-04-02 2011-02-16 无锡华联精工机械有限公司 抛丸清理设备中的丸料供给机构
CN101972993B (zh) * 2010-04-02 2012-11-14 无锡华联精工机械有限公司 抛丸清理设备中的丸料供给机构

Also Published As

Publication number Publication date
DE69510507D1 (de) 1999-08-05
DE69510507T2 (de) 2000-03-09
FR2723020B1 (fr) 1996-09-27
ATE181690T1 (de) 1999-07-15
FR2723020A1 (fr) 1996-02-02
EP0694367B1 (de) 1999-06-30
ES2136820T3 (es) 1999-12-01

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