EP0694367A1 - Blasting machine for remote control - Google Patents

Blasting machine for remote control 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
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EP
European Patent Office
Prior art keywords
sand
machine according
valve
needle
sandblasting machine
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Granted
Application number
EP95440047A
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German (de)
French (fr)
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EP0694367B1 (en
Inventor
Maurice Kegler
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Kegler Maurice
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KEGLER Maurice GARAGE ET SABLAGE INDUSTRIEL
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Publication of EP0694367A1 publication Critical patent/EP0694367A1/en
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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
    • B24C7/0046—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.

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  • 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)
  • Road Repair (AREA)
  • Casting Devices For Molds (AREA)
  • Nozzles (AREA)
  • Disintegrating Or Milling (AREA)
  • Massaging Devices (AREA)

Abstract

The sand blasting machine includes a container (1) holding the sand, with an output orifice (2) at the bottom, the orifice being controlled by a valve (3). A compressed air input is controlled in sync. with the operation of the valve. A sand blasting lance (6) is connected to the output orifice by a coupling (5). Within th machine there is an automatic control regulating the flow of sand. This is connected to a pointer (8) cooperating with the side walls (7) in order to vary the diameter of the sand passage. This pointer (8) is hinged to the centre (10a) of the v-shaped lever (10). One end of the lever assembly is linked to a control screw (11) whilst the other end is connected to a double action control jack (17). <IMAGE>

Description

La présente invention concerne une machine de sablage comportant une cuve contenant du sable, pourvue d' une embouchure de chargement dans sa partie supérieure et d'une bouche de sortie équipée d'une vanne dans sa partie inférieure, une arrivée d'air comprimé commandée en synchronisme avec ladite vanne, une lance de sablage reliée à la bouche de sortie par un raccord, et des moyens de commande de circuits d'alimentation en sable et en air comprimé.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.

Les machines de sablage mobiles connues, utilisées notamment pour sabler des façades de bâtiment, des coques de bateaux, des carrosseries de véhicule, ont généralement une capacité de 50 à 500 kg de sable et selon la taille du chantier doivent être réalimentées à moyen de sacs de sable de 50 kg déversés manuellement dans la cuve de la machine. D'autre part, elles nécessitent la présence de deux opérateurs, dont l'un est généralement placé en hauteur sur un échafaudage et réalisant le sablage à l'aide de la lance de sablage équipée d'une poignée de sécurité, par exemple du type "homme-mort", et l'autre restant en permanence près de la machine pour, d'une part, agir manuellement sur la vanne de sortie de la cuve afin de régler le débit du sable en fonction des besoins du premier opérateur, et d'autre part, réalimenter la machine en sable. De plus, ces machines rencontrent couramment des problèmes de bourrage à niveau de la vanne de sortie, généralement dans le raccord entre la vanne et la lance de sablage. Ces problèmes de bourrage proviennent de la qualité du sable, des différences de diamètre des grains de sable et de l'humidité de l'air. Dans ce cas, le second opérateur doit démonter le raccord entre cette vanne de sortie et la lance de sable et le déboucher manuellement. Cette intervention de débouchage entraîne des pertes de temps, ainsi qu'un gaspillage de sable et d'air comprimé.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. On the other hand, 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. In addition, these machines commonly encounter jamming problems at the outlet valve, generally in the connection between the valve and the sandblasting lance. These clogging problems arise from the quality of the sand, the differences in diameter of the grains of sand and the humidity of the air. In this case, the second operator must dismantle the connection between this outlet valve and the sand lance and unblock it manually. This unclogging intervention leads to loss of time, as well as a waste of sand and compressed air.

La publication européenne n° 0 218 869 décrit une machine de sablage équipée d'un dispositif de régulation du débit comprenant une vis sans fin située entre la vanne de sortie du sable et la lance de sablage. Cette machine n' étant semble-t-il pas utilisée concrètement sur des chantiers, on peut supposer que le système de régulation de débit est soumis à des problèmes importants d'usure, notamment dus à l'abrasion sous pression opérée par le sable.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.

Il existe par ailleurs quelques machines de sablage équipées d'une commande à distance avec possibilité de régler le débit du sable, cette commande étant directement utilisable par l'opérateur réalisant le sablage. Néanmoins, ces machines n' étant pas équipées d'un dispositif de débouchage automatique, la présence d'un second opérateur reste nécessaire.There are also some sandblasting machines equipped with a remote control with the possibility of adjusting the sand flow, this control being directly usable by the operator carrying out the sanding. However, these machines not being equipped with an automatic uncorking device, the presence of a second operator remains necessary.

La présente invention se propose de palier les inconvénients mentionnés ci-dessus en réalisant une machine de sablage à commande à distance. De plus, et grâce aux moyens mis en oeuvre, cette machine peut offrir une capacité de travail, c'est à dire une autonomie en sable, très supérieure à celle des machines actuelles, ce qui augmenté considérablement sa rentabilité.The present invention proposes to overcome the drawbacks mentioned above by providing a remote controlled sandblasting machine. In addition, and thanks to the means used, 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.

Ce but est atteint par une machine de sablage telle que définie en préambule et caractérisée en ce qu' elle comporte des moyens de réglage du débit de sable et des moyens de débouchage automatique, ces moyens étant disposés dans ledit raccord.This object is achieved by 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.

Selon une forme de réalisation préférée, les moyens de réglage du débit comportent au moins un élément mobile coopérant avec un élément fixe pour faire varier le diamètre de passage du sable et un dispositif de commande de cet élément mobile.According to a preferred embodiment, 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.

L'élément fixe peut comporter deux flasques opposés, disposés symétriquement par rapport à l'axe de la bouche de sortie, ces flasques étant de section trapézoïdale, et agencés pour définir entre eux une zone de rétrécissement suivie d'une zone de détente correspondant à passage du sable.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.

L'élément mobile comporte avantageusement un pointeau disposé dans l'axe de la bouche de sortie, ce pointeau étant pourvu d'une tête conique logée dans ladite zone de détente, et une tige montée de manière coulissante dans ledit raccord.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.

De préférence, le dispositif de commande comporte un moteur électrique ou pneumatique commandé par un relais inverseur et agencé pour déplacer une vis sans fin en translation parallèlement à l'axe de la bouche de sortie, et un premier bras d'un levier agencé pour transmettre le déplacement de la vis audit pointeau. Ce premier bras du levier est avantageusement relié d'une part à pointeau par une première articulation et d'autre part à la vis sans fin par une deuxième articulation.Preferably, 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.

Dans la forme de réalisation préférée, les moyens de débouchage comportent au moins ledit élément mobile agencé pour libérer la zone de détente et un dispositif de commande du débouchage agissant sur cet élément mobile.In the preferred embodiment, 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.

Le dispositif de commande du débouchage peut comporter au moins un vérin à double effet pourvu d'une tige agencée pour se déplacer en translation parallèlement à l'axe de l'orifice de sortie, un deuxième bras du levier agencé pour transmettre le déplacement de la tige à pointeau, et des moyens d'actionnement dudit vérin.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.

Le deuxième bras du levier est avantageusement relié d'une part à pointeau par ladite première articulation et d'autre part à la tige du vérin par une troisième articulation.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.

De préférence, les moyens de débouchage comportent en outre un circuit pneumatique commandé par une électrovanne ou une vanne pneumatique et agencé pour envoyer de l'air comprimé entre la bouche de sortie et la zone de rétrécissement.Preferably, 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.

Les moyens d'alimentation dudit vérin peuvent comporter un circuit pneumatique de commande commandé par une électrovanne à deux voies, agencée pour mettre automatiquement le pointeau en position de débouchage dès l'arrêt de la machine et en position de réglage dès le démarrage de la machine.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. .

L'électrovanne est avantageusement agencée pour alimenter simultanément ledit vérin et la vanne de sable à moyen d'un vérin à double effet.The solenoid valve is advantageously arranged to simultaneously supply said cylinder and the sand valve by means of a double-acting cylinder.

Dans la réalisation préférée de l'invention, les boutons de commande des moyens d'actionnement sont centralisés dans un boîtier de commande à distance.In the preferred embodiment of the invention, the control buttons of the actuating means are centralized in a remote control unit.

La présente invention et ses avantages apparaîtront mieux dans la description suivante d'un exemple de réalisation, en référence aux dessins annexés, dans lesquels :

  • la figure 1 est une vue schématique partielle en coupe axiale de la machine de sablage selon l'invention, et
  • la figure 2 est une vue schématique illustrant les différents circuits électriques et pneumatiques de commande de la machine.
The present invention and its advantages will appear more clearly in the following description of an exemplary embodiment, with reference to the appended drawings, in which:
  • FIG. 1 is a partial schematic view in axial section of the sandblasting machine according to the invention, and
  • Figure 2 is a schematic view illustrating the various electrical and pneumatic circuits for controlling the machine.

En référence à la figure 1, seule la partie inférieure de la machine de sablage est représentée, illustrant le dispositif de réglage du débit de sable et le dispositif de débouchage automatique. La machine comporte une cuve 1 remplie de sable pourvue d'une bouche de sortie 2 équipée d'une vanne 3, appelée dans la suite vanne de sable, qui est généralement une vanne du type papillon et qui est montée entre deux flasques 4 de protection contre l'abrasion. La commande de cette vanne de sable à moyen d'un vérin à double effet sera décrite par la suite.With reference to FIG. 1, only the lower part of the sandblasting machine is shown, illustrating the device for adjusting the sand flow rate and the automatic unblocking device. 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. The control of this sand valve by means of a double-acting cylinder will be described later.

En aval de cette vanne de sable sont prévus les dispositifs de réglage du débit et de débouchage automatique, logés dans un raccord 5 en T renversé couplé d'une part à la bouche de sortie 2 de la cuve et d'autre part à une lance de sablage 6.Downstream of this sand valve are provided the flow adjustment and automatic uncapping devices, housed in an inverted 5-T connection coupled on the one hand to the outlet mouth 2 of the tank and on the other hand to a lance. sandblasting 6.

Le dispositif de réglage du débit comporte deux flasques 7 opposés disposés symétriquement par rapport à l'axe de la bouche de sortie 2, de section trapézoïdale, définissant entre eux une zone de rétrécissement 7a suivie d'une zone de détente 7b du flux de sable, un pointeau 8 pourvu d'une tige 8a et d'une tête conique 8b, situé dans l'axe de la bouche de sortie 2. Cette tête conique 8b étant logée dans ladite zone de détente 7b, définissant ainsi le diamètre de passage du sable. La tige 8a du pointeau est coulissante dans un palier 9 prévu à point bas du raccord 5. L' extrémité extérieure de cette tige est articulée dans la partie médiane d'un levier 10 en forme de V à point 10a. La première extrémité 10b de ce levier 10 est articulée à une vis sans fin 11, mobile en translation suivant son axe, qui est parallèle à l'axe de la bouche de sortie 2 et par conséquent parallèle à celui du pointeau 8. Son mouvement de translation est commandé par un moteur électrique 12, un engrenage 13 de réduction de vitesse et un écrou 14 mobile en rotation prévu dans un châssis fixe 15 et coopérant avec ladite vis 11. Ce dispositif permet de régler le débit du sable. En effet, la rotation du moteur 12 dans un sens ou dans l'autre entraîne un déplacement rectiligne de la vis 11 vers le haut ou vers le bas, faisant pivoter le levier 10 autour de sa deuxième extrémité 10c, générant ainsi un déplacement rectiligne du pointeau 8 dans le même sens que celui de la vis. Ainsi, le diamètre de passage du sable peut être augmenté ou réduit, augmentant ou réduisant ainsi son débit. Ce moteur 12 peut être aisément commandé à distance par l'opérateur effectuant le sablage.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. Thus, 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.

Le dispositif de débouchage automatique utilise, en partie, le dispositif de réglage décrit ci-dessus. La deuxième extrémité 10c du levier 10 est articulée à la tige 16 d'un vérin à double effet 17. Ce dernier est monté sur le châssis fixe 15. Cet ensemble permet de déboucher automatiquement la zone de passage du sable. En effet, en cours de sablage, le vérin 17 est en position haute et n'agit pas sur le levier 10 ni sur le pointeau 8. Lors de l'arrêt du sablage, le vérin 17 se met en position basse, engendrant la rotation du levier 10 autour de sa première extrémité 10b, qui fait descendre le pointeau 8 en position basse, libérant ainsi le passage du sable, et par la même occasion les éventuels blocs de sable aggloméré. Ce vérin 17 est commandé automatiquement, comme on le verra plus loin.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. In fact, during sanding, the jack 17 is in the high position and does not act on the lever 10 or on the needle 8. When the sanding stops, 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.

La figure 2 représente schématiquement les différents circuits énumérés ci-dessous :

  • un circuit pneumatique de mise sous pression de la cuve 1 de sable,
  • un circuit pneumatique pour créer le mélange sable/air destiné à sablage,
  • un circuit pneumatique de dépoussiérage,
  • un circuit pneumatique de débouchage,
  • un circuit pneumatique de commande du vérin de débouchage 17 et du vérin associé à la vanne de sable 3,
  • un circuit électrique de commande.
Figure 2 shows schematically the different circuits listed below:
  • a pneumatic circuit for pressurizing the sand tank 1,
  • a pneumatic circuit to create the sand / air mixture intended for sandblasting,
  • a pneumatic dedusting circuit,
  • a pneumatic unclogging circuit,
  • a pneumatic circuit for controlling the drain cylinder 17 and the cylinder associated with the sand valve 3,
  • an electrical control circuit.

Les circuits pneumatiques sont alimentés par un compresseur (non représenté). Un détendeur de pression 18 alimente les quatre premiers circuits.The pneumatic circuits are supplied by a compressor (not shown). A pressure relief valve 18 supplies the first four circuits.

Le circuit pneumatique de mise sous pression de la cuve 1 de sable comporte une première conduite 19, mise sous pression dès l'ouverture de la vanne du compresseur, qui envoie l'air comprimé dans la partie supérieure de la cuve 1, déclenchant la fermeture automatique de l'embouchure de chargement 20 de la cuve à moyen d'un dispositif de sécurité à cône 21. Sous l'effet de la montée en pression dans la cuve 1, ce cône 21 obture automatiquement l'embouchure 20 par l'intermédiaire d'un joint d'étanchéité 22. La cuve 1 est ainsi mise sous pression pour faciliter la sortie du sable par la bouche de sortie 2 située dans sa partie inférieure. Cette conduite 19 comporte un clapet anti-retour 23 pour maintenir la cuve sous pression, et une purge 24 pour la dépressuriser en fin de travail .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.

Le circuit pneumatique destiné à créer le mélange sable/air utilisé pour le sablage comporte une deuxième conduite 25 qui envoie par l'ouverture d'une vanne 26, appelée par la suite vanne d'air, l'air comprimé dans le raccord 5 entre la bouche de sortie 2 et la lance de sablage 6. Cette vanne d'air 26 est directement couplée à cette dernière par son axe de commande (non représenté) et commandée en même temps que la vanne de sable 3. Cette conduite 25 est protégée par un clapet anti-retour 27 évitant les risques de détérioration du circuit amont par le sable.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.

Le circuit pneumatique de dépoussiérage comporte une troisième conduite 28, placée en dérivation sur la deuxième et court-circuitant ainsi la vanne d'air 26. Elle comporte une électrovanne 29 et permet d'alimenter en air la lance de sablage 6 pour effectuer un dépoussiérage.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 .

Le circuit pneumatique de débouchage comporte une quatrième conduite 30, équipée d'une électrovanne 31, qui envoie l'air entre la vanne de sable 3 et le pointeau 8 permettant ainsi le débouchage de cette zone.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.

Le circuit pneumatique de commande 32 du vérin de débouchage 17 et du vérin 33 associé à la vanne de sable 3, prélève l'air comprimé en amont du détendeur 18. Le but est de générer une pression suffisante à l'actionnement des vérins 17, 33. Ce circuit 32 est alimenté en air dès l'ouverture de la vanne du compresseur. Il comporte un manomètre de contact électrique 34, un clapet anti-retour 35, une réserve d'air comprimé 36 et une électrovanne 37 actionnée par une bobine 38 et un ressort de rappel 39. Cette électrovanne 37 alimente simultanément le vérin de débouchage 17 et le vérin 33 de la vanne de sable 3. La réserve d'air 36 est une sécurité qui permet d'alimenter l'électrovanne 37 en cas de rupture de l'alimentation d'air, suite à une panne de compresseur o à une rupture de conduite.The pneumatic control circuit 32 of the unblocking jack 17 and of the jack 33 associated with the sand valve 3, draws the compressed air upstream of the pressure reducer 18. 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.

Le circuit électrique de commande 40 alimenté en basse tension par une batterie 41 de 12 ou 24 V, comporte un fusible 42, un bouton d'arrêt d'urgence 43 placé sur la machine de sablage, une commande à distance placée sur la lance de sablage appelée poignée "homme-mort" 44. De cette manière, en cours d'utilisation, l'opérateur doit maintenir une pression manuelle sur cette poignée. Ce circuit électrique 40 comporte en plus la bobine 38 de l'électrovanne 37 et une prise de terre 45. Afin d'éviter les risques de mise sous tension alors que les circuits pneumatiques ne sont pas alimentés en air comprimé, ce circuit électrique 40 passe par le manomètre de contact électrique 34 du circuit pneumatique de commande 32, qui n'autorise la fermeture du circuit électrique 40 que si ce dernier est alimenté en air.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.

Le moteur électrique 12 du dispositif de réglage du débit est alimenté par un relais inverseur électrique commandé à distance (non représenté).The electric motor 12 of the flow control device is supplied by a remote controlled electric change-over relay (not shown).

Il est intéressant de signaler que toutes les commandes électriques sont centralisées dans un boîtier de commande à distance (non représenté) porté par l'opérateur effectuant le sablage.It is interesting to note that all the electrical controls are centralized in a remote control unit (not shown) carried by the operator performing the sanding.

Lors de la mise en marche de la machine de sablage, la vanne du compresseur est ouverte, la cuve 1 est mise automatiquement sous pression et le circuit pneumatique de commande 32 est alimenté.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.

L'opérateur prêt à sabler actionne sa poignée "homme-mort" 44 mettant le circuit électrique 40 sous tension, qui actionne l'électrovanne 37 alimentant les vérins 17, 33 par le circuit B. Le pointeau 8 se met alors en position haute réglée de travail et la vanne de sable 3 s'ouvre, ouvrant simultanément la vanne d'air 26. Le sablage peut s'effectuer. A tout moment, l'opérateur peut régler le débit du sable en commandant, de son boîtier, la rotation dans un sens ou dans l'autre du moteur de réglage 12. Lors d'un arrêt de sablage, lorsque l'opérateur relâche sa poignée "homme-mort" 44, le circuit électrique 40 s'ouvre et l'électrovanne 37 qui n'est plus alimentée retourne dans sa position de repos par son ressort de rappel 39, alimentant ainsi les vérins 17, 33 par le circuit A. Le pointeau 8 se met alors en position basse de repos et la vanne de sable 3 se referme, refermant simultanément la vanne d'air 26. L'opérateur peut alors actionner, de son boîtier, l'électrovanne de débouchage 31, nettoyant le passage entre la vanne de sable 3 et le pointeau 8, puis l'électrovanne de dépoussiérage 29 s'il souhaite nettoyer son environnement et sa surface de travail. A redémarrage, le pointeau 8 se remet automatiquement dans sa dernière position de travail, délivrant le même débit de sable. Il ne se crée aucun dérèglage.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. At any time, 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. During a sanding stop, when the operator releases his "dead man" handle 44, 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. Upon restart, the needle 8 automatically returns to its last working position, delivering the same flow of sand. There is no disruption.

Cette description montre clairement que la machine de sablage selon l'invention attéint les buts mentionnés. Elle est équipée de dispositifs de sécurité qui la rend encore plus fiable à utiliser. Notamment, en cas de rupture du circuit d'air, la réserve d'air 36 permet d'alimenter les vérins 17, 33 pour fermer la vanne de sable 3 et mettre le pointeau 8 en position basse de repos, c' est-à-dire en position débouchage.This description clearly shows that 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. In particular, in the event of a break in the air circuit, 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.

De par sa conception, cette machine de sablage permet à une personne seule de travailler sur un chantier, en toute sécurité et avec un maximum d'efficacité. Elle est facilement transportable par un camion et peut être utilisée en fixe ou en mobile. Sa grande capacité de stockage de sable lui permet de charger du sable en vrac permettant une économie importante par rapport aux sacs de sable de 50 kg. L'ensemble de tous ces paramètres augmente considérablement la rentabilité d'une telle machine.By design, 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.

La présente invention n'est pas limitée à l'exemple de réalisation décrit mais s' étend à toute modification et variante évidente pour l'homme de l'art. Toutes les commandes électriques peuvent par exemple être remplacées par des commandes pneumatiques.The present invention is not limited to the embodiment described but extends to any modification and variant obvious to those skilled in the art. All electrical controls can, for example, be replaced by pneumatic controls.

Claims (13)

Machine de sablage à commande à distance comportant une cuve (1) contenant du sable, pourvue d'une embouchure de chargement (20) dans sa partie supérieure et d'une bouche de sortie (2) équipée d'une vanne (3) dans sa partie inférieure, une arrivée d'air comprimé (25) commandée en synchronisme avec ladite vanne (3), une lance de sablage (6) reliée à la bouche de sortie (2) par un raccord (5), et des moyens de commande de circuits d'alimentation en sable et en air comprimé, caractérisé en ce qu'elle comporte des moyens de réglage du débit de sable et des moyens de débouchage automatique, ces moyens étant disposés dans ledit raccord (5).Remote control sandblasting machine comprising a tank (1) containing sand, provided with a loading mouth (20) in its upper part and an outlet mouth (2) equipped with a valve (3) in its lower part, a compressed air inlet (25) controlled in synchronism with said valve (3), a sandblasting lance (6) connected to the outlet mouth (2) by a connector (5), and means for control of sand and compressed air supply circuits, characterized in that it comprises means for adjusting the sand flow rate and automatic uncorking means, these means being disposed in said connector (5). Machine de sablage selon la revendication 1, caractérisée en ce que les moyens de réglage du débit comportent au moins un élément mobile coopérant avec un élément fixe pour faire varier le diamètre de passage du sable et un dispositif de commande de cet élément mobile.Sandblasting machine according to claim 1, characterized in that 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 device for controlling this mobile element. Machine de sablage selon la revendication 2, caractérisée en ce que l'élément fixe comporte deux flasques (7) opposés, disposés symétriquement par rapport à l'axe de la bouche de sortie (2), ces flasques étant de section trapézoïdale, et agencés pour définir entre eux une zone de rétrécissement (7a) suivie d'une zone de détente (7b) correspondant à passage du sable.Sandblasting machine according to claim 2, characterized in that the fixed element comprises two opposite flanges (7), arranged symmetrically with respect to the axis of the outlet mouth (2), these flanges being of trapezoidal section, and arranged to define between them a narrowing zone (7a) followed by an expansion zone (7b) corresponding to the passage of the sand. Machine de sablage selon les revendications 2 et 3, caractérisée en ce que l'élément mobile comporte un pointeau (8) disposé dans l'axe de la bouche de sortie (2), ce pointeau étant pourvu d'une tête conique (8b) logée dans ladite zone de détente (7b), et une tige (8a) montée de manière coulissante dans ledit raccord (5).Sandblasting machine according to claims 2 and 3, characterized in that the movable element comprises a needle (8) disposed in the axis of the outlet mouth (2), this needle being provided with a conical head (8b) housed in said expansion zone (7b), and a rod (8a) slidably mounted in said fitting (5). Machine de sablage selon la revendication 2, caractérisée en ce que le dispositif de commande comporte un moteur électrique ou pneumatique (12) commandé par un relais inverseur et agencé pour déplacer une vis sans fin (11) en translation parallèlement à l'axe de la bouche de sortie (2), et un premier bras d'un levier (10) agencé pour transmettre le déplacement de la vis (11) audit pointeau (8).Sandblasting machine according to claim 2, characterized in that the control device comprises an electric or pneumatic motor (12) controlled by an inverter relay and arranged for moving a worm (11) in translation parallel to the axis of the outlet mouth (2), and a first arm of a lever (10) arranged to transmit the movement of the screw (11) to said needle (8 ). Machine de sablage selon la revendication 5, caractérisée en ce que le premier bras du levier (10) est relié d'une part à pointeau (8) par une première articulation (10a) et d'autre part à la vis sans fin (11) par une deuxième articulation (10b).Sandblasting machine according to claim 5, characterized in that the first arm of the lever (10) is connected on the one hand to needle (8) by a first articulation (10a) and on the other hand to the worm (11 ) by a second articulation (10b). Machine de sablage selon la revendication 1, caractérisée en ce que les moyens de débouchage comportent au moins ledit élément mobile agencé pour libérer la zone de détente (7b) et un dispositif de commande du débouchage agissant sur cet élément mobile.Sandblasting machine according to claim 1, characterized in that the unblocking means comprise at least said movable element arranged to release the expansion zone (7b) and a device for controlling the unclogging acting on this movable element. Machine de sablage selon la revendication 7, caractérisée en ce que le dispositif de commande du débouchage comporte à moins un vérin à double effet (17) pourvu d'une tige (16) agencée pour se déplacer en translation parallèlement à l'axe de l'orifice de sortie (2), un deuxième bras du levier (10) agencé pour transmettre le déplacement dé la tige (16) à pointeau (8), et des moyens d'actionnement dudit vérin (17).Sandblasting machine according to claim 7, characterized in that the uncorking control device comprises at least one double-acting cylinder (17) provided with a rod (16) arranged to move in translation parallel to the axis of the 'outlet orifice (2), a second arm of the lever (10) arranged to transmit the displacement of the rod (16) with needle (8), and means for actuating said jack (17). Machine de sablage selon la revendication 8, caractérisée en ce que le deuxième bras du levier (10) est relié d'une part à pointeau (8) par ladite première articulation (10a) et d'autre part à la tige (16) du vérin par une troisième articulation (10c).Sandblasting machine according to claim 8, characterized in that the second arm of the lever (10) is connected on the one hand to needle (8) by said first articulation (10a) and on the other hand to the rod (16) of the cylinder by a third articulation (10c). Machine de sablage selon la revendication 7, caractérisée en ce que les moyens de débouchage comportent en outre un circuit pneumatique (30) commandé par une électrovanne ou une vanne pneumatique (31) et agencé pour envoyer de l'air comprimé entre la bouche de sortie (2) et la zone de rétrécissement (7a).Sandblasting machine according to claim 7, characterized in that the unblocking means further comprise a pneumatic circuit (30) controlled by a solenoid valve or a pneumatic valve (31) and arranged to send compressed air between the outlet mouth (2) and the narrowing zone (7a). Machine de sablage selon la revendication 8, caractérisée en ce que les moyens d'alimentation dudit vérin (17) comportent un circuit pneumatique de commande (32) commandé par une électrovanne (37) à deux voies, agencée pour mettre automatiquement le pointeau (8) en position de débouchage dès l'arrêt de la machine et en position de réglage dès le démarrage de la machine.Sandblasting machine according to claim 8, characterized in that the means for feeding said jack (17) comprise a circuit control tire (32) controlled by a two-way solenoid valve (37), arranged to automatically set the needle (8) in the unclogging position as soon as the machine stops and in the adjustment position as soon as the machine starts. Machine de sablage selon la revendication 11, caractérisée en ce que l'électrovanne (37) est agencée pour alimenter simultanément ledit vérin (17) et la vanne de sable (3) à moyen d'un vérin (33) à double effet.Sandblasting machine according to claim 11, characterized in that the solenoid valve (37) is arranged to simultaneously supply said cylinder (17) and the sand valve (3) by means of a double-acting cylinder (33). Machine de sablage selon l'une quelconque des revendications précédentes, caractérisée en ce que les boutons de commande des moyens d'actionnement sont centralisés dans un boîtier de commande à distance.Sandblasting machine according to any one of the preceding claims, characterized in that the control buttons for the actuating means are centralized in a remote control unit.
EP95440047A 1994-07-26 1995-07-25 Blasting machine for remote control Expired - Lifetime EP0694367B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9409396 1994-07-26
FR9409396A FR2723020B1 (en) 1994-07-26 1994-07-26 REMOTE CONTROL SANDING MACHINE

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EP0694367A1 true EP0694367A1 (en) 1996-01-31
EP0694367B1 EP0694367B1 (en) 1999-06-30

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EP (1) EP0694367B1 (en)
AT (1) ATE181690T1 (en)
DE (1) DE69510507T2 (en)
ES (1) ES2136820T3 (en)
FR (1) FR2723020B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0950469A2 (en) * 1998-04-16 1999-10-20 Kjell Rickling Blast valve
CN101972993A (en) * 2010-04-02 2011-02-16 无锡华联精工机械有限公司 Shot material feeding mechanism in shot blasting cleaning equipment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013005237U1 (en) * 2013-06-03 2013-07-12 Terex Cranes Germany Gmbh Follow-up control for a blasting hose

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE564656A (en) *
US2753664A (en) * 1953-04-20 1956-07-10 Pangborn Corp Abrasive blasting system
CH397462A (en) * 1962-11-17 1965-08-15 Vacu Blast Ltd Sandblasting blower
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 (en) * 1981-04-01 1982-10-06 GKSS-Forschungszentrum Geesthacht GmbH Apparatus for the surface-treatment of buildings and ships
WO1986004288A1 (en) * 1985-01-29 1986-07-31 Hollosi Ferenc Method and device for scattering grains
EP0218869A1 (en) 1985-09-20 1987-04-22 SCHLICK-Roto-Jet Maschinenbau GmbH Device for uniformly dosing granular abrasive material in pneumatically working blasting devices
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 (en) *
US2753664A (en) * 1953-04-20 1956-07-10 Pangborn Corp Abrasive blasting system
CH397462A (en) * 1962-11-17 1965-08-15 Vacu Blast Ltd Sandblasting blower
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 (en) * 1981-04-01 1982-10-06 GKSS-Forschungszentrum Geesthacht GmbH Apparatus for the surface-treatment of buildings and ships
WO1986004288A1 (en) * 1985-01-29 1986-07-31 Hollosi Ferenc Method and device for scattering grains
EP0218869A1 (en) 1985-09-20 1987-04-22 SCHLICK-Roto-Jet Maschinenbau GmbH Device for uniformly dosing granular abrasive material in pneumatically working blasting devices
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 (en) * 1998-04-16 1999-10-20 Kjell Rickling Blast valve
EP0950469A3 (en) * 1998-04-16 2000-03-08 Kjell Rickling Blast valve
CN101972993A (en) * 2010-04-02 2011-02-16 无锡华联精工机械有限公司 Shot material feeding mechanism in shot blasting cleaning equipment
CN101972993B (en) * 2010-04-02 2012-11-14 无锡华联精工机械有限公司 Shot material feeding mechanism in shot blasting cleaning equipment

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DE69510507T2 (en) 2000-03-09
EP0694367B1 (en) 1999-06-30
FR2723020B1 (en) 1996-09-27
FR2723020A1 (en) 1996-02-02
ES2136820T3 (en) 1999-12-01
ATE181690T1 (en) 1999-07-15

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