EP0430735A1 - High voltage connector for X-ray tube - Google Patents

High voltage connector for X-ray tube Download PDF

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Publication number
EP0430735A1
EP0430735A1 EP90403120A EP90403120A EP0430735A1 EP 0430735 A1 EP0430735 A1 EP 0430735A1 EP 90403120 A EP90403120 A EP 90403120A EP 90403120 A EP90403120 A EP 90403120A EP 0430735 A1 EP0430735 A1 EP 0430735A1
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EP
European Patent Office
Prior art keywords
cathode
pin
pins
grid
high voltage
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
EP90403120A
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German (de)
French (fr)
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EP0430735B1 (en
Inventor
Jacques Sireul
Hans Jedlitschka
Jean-Michel Miquel
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General Electric CGR SA
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General Electric CGR SA
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Publication of EP0430735A1 publication Critical patent/EP0430735A1/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/02—Electrical arrangements
    • H01J2235/023—Connecting of signals or tensions to or through the vessel
    • H01J2235/0233—High tension

Definitions

  • the invention relates to devices for the electrical supply of X-ray tubes and, more particularly in such devices, the connectors which are used to make the electrical connections between the electrical supply device itself and the X-ray tube arranged. in a tank filled with an insulating and cooling medium.
  • X-rays are generally produced using an X-ray tube.
  • the X-ray tube is contained in a metal sheath filled with an oil. electrically insulating, the sheath being intended in particular to ensure the protection of users against electric shock and X-radiation.
  • the sheath equipped with an X-ray tube is called an X-ray assembly.
  • the supply elements of the X-ray tube and in particular the elements of a high-voltage generator producing the high supply voltage of the X-ray tube are grouped in another enclosure located at a distance from the radiogenic assembly.
  • one or more cables with high electrical insulation carry the positive and negative polarities of the high voltage into the sheath containing the X-ray tube by means of electrical connections.
  • Such an electrical connection device or connector is formed in two parts, one of which, called receptacle, constitutes a female part permanently fixed to the sheath; the other part constitutes a male part or end piece intended to be fitted into the receptacle and which is integral with the cable.
  • the receptacle and the end-piece are made of electrically insulating materials and have shapes and dimensions imposed by international standards.
  • the sheath is brought to ground or earth potential, as is an outer casing of the cable (s), one of the manufacturers' constant concerns being that all of the outer surfaces of the sheath of the connection and cables are metallic, and that there is electrical continuity between all these organs.
  • the electrical contact (s) which are made by an electrical connection device, are made in the bottom of the receptacle between first contact members secured to the end piece and second contact members secured to the receptacle and which pass through the bottom wall of the latter and thus open inside the sheath.
  • the receptacle plunges deep enough inside the sheath so that the end of the second contact element opens into the sheath, at a sufficient distance from the internal wall of the latter, to avoid an electrical breakdown between the metal sheath which is grounded and this contact element which is at the potential of the high voltage.
  • this contact is connected by a connecting conductor to the cathode of the X-ray tube and the anode of the latter is brought to the positive polarity by another connecting conductor, inside the sheath, between the anode and another contact member of another electrical connection device.
  • the connectors have 3 or 4 pins which are distributed over a circumference having a diameter of 20.62 millimeters according to the usual standards.
  • the latter are arranged at 120 ° from one another.
  • X-ray tubes are used which include, in addition to the cathode and the anode, electrodes called grids which are used to modify the path of the electron beam emitted by the cathode or to modulate it or even better. focus it.
  • the voltages applied to these grids can be from a few tens of volts to a few kilovolts and it is therefore necessary to provide for their supply via appropriate connectors.
  • the object of the present invention is therefore to produce a high voltage connector for an X-ray tube which has five pins so as to supply this cathode with two cathode filaments and two grids.
  • the invention relates to a high voltage connector for supplying the cathode, two cathode filaments and two grids of an X-ray tube, characterized in that it comprises five pins, one for supplying the cathode , two to supply the cathode filaments and the last two to supply the two grids, the arrangement of the pins being such that the distance between the cathode pin and a grid pin and that between the two grid pins is greater than that between a cathode pin and a cathode filament pin.
  • the pins are distributed over a circumference so that the cathode and filament pins are angularly separated by an angle which is smaller than that separating the cathode pin from that of a grid or that separating the two pins of grids or a grid pin relative to the nearest filament pin.
  • angles separating the cathode and filament pins is approximately 60 ° and in that the angle separating one grid pin from the other grid pin or from the nearest filament pin is about 80 °.
  • the high-voltage connector usually comprises a female part and a male part each in the form of a cylindrical tube fitting one in the other and is characterized in that the internal wall of the cylindrical tube of the male part has five longitudinal ribs separated in the same way as the pins, said ribs being used during assembly, to center a cable and to guide the conductors of said cable.
  • a high voltage connector for an X-ray tube comprises (FIGS. 1 and 2) a female part 21 which is tightly fixed to a wall of the sheath and a male part 22 which is movable and is fixed to the end of a cable 23 comprising a certain number of conductors.
  • the female 21 and male 22 parts have the form of elongated cylindrical tubes 24 and 31 whose dimensions are such that the male part fits easily into the female part.
  • connection pad 27 crosses the thickness of the end of the tube 24 and comprises, inside the tube, a receptacle 28 for the male plug of the connector and, on the outside, a conventional connection terminal 29 for example of the type with hole 30 and clamping screw 20 for fixing an electrical conductor for connection with an electrode of the X-ray tube.
  • the cylindrical tube 24 is terminated at the open end 25 by a first flange 32 for centering the tube in the orifice in the wall of the sheath and a second flange 33 for bearing on said wall by means of a seal. (not shown).
  • the flange 32 is provided externally with a polarizer 34 to define its position with respect to the orifice in the wall; the flange 33 is provided externally with a first locating notch 35 corresponding to the cathode pin and internally with a second notch 36 to define the position of the male part.
  • the cylindrical tube 31 of the male part of the connector is open at one end 37 (FIG. 3) to receive the cable 23 and is closed at the other end 48 to carry the male plugs 38 five in number.
  • Each male plug has a hollow base in the middle to receive a conductor of the cable 23.
  • This base has a hexagonal shape, a section of which abuts on the internal wall and is extended by a contact 45 in the form of a cylinder of revolution which is equipped flexible strips 46 making electrical contact with the receptacle 28 of the female part. Above the base, the contact is threaded over a certain length to cooperate with a clamping ring 47.
  • Each male plug 38 is held in an orifice drilled in the end 48 by means of the ring 47 which screws onto the threaded part of contact 45.
  • the end 37 has two other holes, one 39 for filling an overmolding product and the other 40 for use as a vent during the overmolding operation. .
  • the cylindrical tube 31 is terminated at the open end 37 by a flange 41 on which is crimped a ferrule 42 which is in contact with the metallic braid 43 of the cable 23.
  • This ferrule makes it possible to ground the metallic braid of the cable.
  • the external surface of the tube 31 includes a polarizing device 44 which cooperates with the notch 36 of the tube 24.
  • the internal wall of the tube 31 has five longitudinal ribs 49 which are angularly spaced in the same way as the pins, each angular space on the wall corresponding to a pin. These ribs serve, when mounting the cable 23, on the one hand, for centering elements and, on the other hand, for guiding the five conductors 56 to 60 of the cable 23.
  • the conductors 46 to 50 are first preformed and welded to the plugs 38. Then the cable 23 is slipped into the tube 31, the ribs 45 serving as a guide for each of the plugs, so that the contacts of the plugs 38 pass through the end holes. The ring 47 is then screwed onto the threaded part of each plug to lock them in position. The metallic ferrule 42 which has been placed around the cable before it is mounted in the tube 31, is then crimped around the metallic braid 43 and the flange 41. Finally, the last operation consists in filling through the orifice 39 the internal volume of the tube 31 by an overmoulding product 50 so as to hold the cable 23 and the conductors 56 to 60 in place and to isolate the latter from each other and from ground.
  • connection pads 27, and therefore the contact plugs 38 are distributed respectively over the ends of the tubes 24 and 31 as shown in FIG. 5 which is a front view of the contact plugs of the male part 22.
  • the plug 51 corresponds to the high voltage supply of the cathode, of the order of 70 kilovolts relative to the mass.
  • the plug 52 corresponds to the supply of a cathode filament to obtain an electron beam giving rise to a large X-ray focus.
  • the plug 53 corresponds to the supply of a cathode filament to obtain an electron beam giving rise to a focus of X-rays of smaller dimensions.
  • the plug 54 corresponds to the polarization of a first grid while the plug 55 corresponds to the polarization of a second grid.
  • the plugs 52 and 53 are arranged near the plug 51 because they are substantially at the same potential as that of the cathode, to within a few tens of volts.
  • the plugs 54 and 55 must be separated from the plugs 51, 52 and 53 because they are at potentials which are different from several kilovolts between them and with respect to the high voltage. It is therefore recommended that the distance between the cathode pin and a grid pin and that the distance between the two grid pins is greater than that between a cathode pin and a filament pin.
  • the five plugs are arranged on the same circumference having a diameter equal to the usual standards observed in the connectors 3 or 4 pins, or 20.62 millimeters. Furthermore, the five sheets are distributed angularly so that the sheets 51, 52 and 53 are separated by an angle of about 60 ° while the sheets 52, 53 54 and 55 are separated by an angle of about 80 °, which allows you to respect the distance rules indicated above.

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  • X-Ray Techniques (AREA)

Abstract

The invention relates to radiation-generating assemblies and more particularly to the connectors at the cooling tank. …<??>The invention resides in the production of a high-voltage connector for the high-voltage supply of the cathode, of two cathode filaments and of two grids of an X-ray tube, characterised in that it comprises five pins (27, 38), one for supplying the cathode, two for supplying the filaments of the cathode and the last two for supplying the two grids, the arrangement of the pins (51 - 55) being such that the distance between one cathode filament pin (52, 53) and the cathode pin (51) is smaller than that between the cathode pin (51) and a grid pin (54, 55) and that between the two grid pins (54, 55). …<IMAGE>…

Description

L'invention concerne les dispositifs d'alimentation électrique de tubes à rayons X et, plus particulièrement dans de tels dispositifs, les connecteurs qui sont utilisés pour effectuer les liaisons électriques entre le dispositif d'alimentation électrique proprement dit et le tube à rayons X disposé dans une cuve remplie d'un milieu isolant et réfrigérant.The invention relates to devices for the electrical supply of X-ray tubes and, more particularly in such devices, the connectors which are used to make the electrical connections between the electrical supply device itself and the X-ray tube arranged. in a tank filled with an insulating and cooling medium.

Dans les installations de radiodiagnostic, le rayonnement X est généralement produit à l'aide d'un tube à rayons X. Selon une disposition courante, d'une part, le tube à rayons X est contenu dans une gaine métallique remplie d'une huile électriquement isolante, la gaine étant destinée notamment à assurer la protection des utilisateurs contre les chocs électriques et le rayonnement X. La gaine équipée d'un tube à rayons X est appelée ensemble radiogène. D'autre part, les éléments d'alimentation du tube à rayons X et en particulier les éléments d'un générateur haute tension produisant la haute tension d'alimentation du tube à rayons X, sont regroupés dans une autre enceinte située à distance de l'ensemble radiogène. Selon le type de l'alimentation en haute tension, monopolaire ou symétrique, un ou plusieurs câbles à haute isolation électrique transportent les polarités positive et négative de la haute tension jusque dans la gaine contenant le tube à rayons X par l'intermédiaire de dispositifs de connexions électriques. Un tel dispositif de connexion électrique ou connecteur est formé en deux parties dont l'une, appelée réceptacle, constitue une pièce femelle fixée à demeure à la gaine ; l'autre partie constitue une pièce mâle ou embout destinée à être emboîtée dans le réceptacle et qui est solidaire du câble.In diagnostic X-ray installations, X-rays are generally produced using an X-ray tube. According to a common arrangement, on the one hand, the X-ray tube is contained in a metal sheath filled with an oil. electrically insulating, the sheath being intended in particular to ensure the protection of users against electric shock and X-radiation. The sheath equipped with an X-ray tube is called an X-ray assembly. On the other hand, the supply elements of the X-ray tube and in particular the elements of a high-voltage generator producing the high supply voltage of the X-ray tube, are grouped in another enclosure located at a distance from the radiogenic assembly. Depending on the type of high-voltage power supply, monopolar or symmetrical, one or more cables with high electrical insulation carry the positive and negative polarities of the high voltage into the sheath containing the X-ray tube by means of electrical connections. Such an electrical connection device or connector is formed in two parts, one of which, called receptacle, constitutes a female part permanently fixed to the sheath; the other part constitutes a male part or end piece intended to be fitted into the receptacle and which is integral with the cable.

Etant donné les valeurs très élevées que peut atteindre la haute tension d'alimentation d'un tube à rayons X, 150 Kilovolts par exemple, le réceptacle et l'embout sont réalisés dans des matériaux électriquement isolants et ont des formes et des dimensions imposées par des normes internationales. Dans un but de protection des utilisateurs, la gaine est portée au potentiel de la masse ou terre, de même qu'une enveloppe extérieure du ou des câbles, un des soucis constant des constructeurs étant que toutes les surfaces extérieures de la gaine du dispositif de connexion et des câbles soient métalliques, et qu'il y ait continuité électrique entre tous ces organes.Given the very high values that the high supply voltage of an X-ray tube can reach, 150 kilovolts for example, the receptacle and the end-piece are made of electrically insulating materials and have shapes and dimensions imposed by international standards. In order to protect users, the sheath is brought to ground or earth potential, as is an outer casing of the cable (s), one of the manufacturers' constant concerns being that all of the outer surfaces of the sheath of the connection and cables are metallic, and that there is electrical continuity between all these organs.

Le ou les contacts électriques qui sont réalisés par un dispositif de connexion électrique, s'effectuent dans le fond du réceptacle entre des premiers organes de contact solidaires de l'embout et des seconds organes de contact solidaires du réceptacle et qui traversent la paroi de fond de ce dernier et débouchent ainsi à l'intérieur de la gaine. Le réceptacle plonge assez profondément à l'intérieur de la gaine de manière que l'extrémité du second élément de contact débouche à l'intérieur de la gaine, à une distance suffisante de la paroi interne de cette dernière, pour éviter un claquage électrique entre la gaine métallique qui est à la masse et cet élément de contact qui est au potentiel de la haute tension. En supposant que la polarité transportée soit la polarité négative, ce contact est relié par un conducteur de liaison à la cathode du tube à rayons X et l'anode de ce dernier est portée à la polarité positive par un autre conducteur de liaison, à l'intérieur de la gaine, entre l'anode et un autre organe de contact d'un autre dispositif de connexion électrique.The electrical contact (s) which are made by an electrical connection device, are made in the bottom of the receptacle between first contact members secured to the end piece and second contact members secured to the receptacle and which pass through the bottom wall of the latter and thus open inside the sheath. The receptacle plunges deep enough inside the sheath so that the end of the second contact element opens into the sheath, at a sufficient distance from the internal wall of the latter, to avoid an electrical breakdown between the metal sheath which is grounded and this contact element which is at the potential of the high voltage. Assuming that the polarity transported is the negative polarity, this contact is connected by a connecting conductor to the cathode of the X-ray tube and the anode of the latter is brought to the positive polarity by another connecting conductor, inside the sheath, between the anode and another contact member of another electrical connection device.

Cependant, ces précautions à elles seules ne suffisent pas pour éviter les risques de claquages électriques à l'intérieur de la gaine et l'isolation électrique correcte dans cette dernière n'est parfaitement réalisée que si la gaine est remplie d'un fluide ou huile électriquement isolante. Dans ces conditions, il est pratiquement impossible, malgré la présence de l'huile isolante, de placer à l'intérieur de la gaine un élément métallique à proximité du réceptacle.However, these precautions alone are not enough to avoid the risk of electrical breakdowns inside the sheath and the correct electrical insulation in the latter is only perfectly achieved if the sheath is filled with a fluid or oil electrically insulating. Under these conditions, it is practically impossible, despite the presence of the insulating oil, to place a metallic element inside the sheath near the receptacle.

Selon le type du tube à rayons X utilisé, les connecteurs comportent 3 ou 4 broches qui sont réparties sur une circonférence ayant un diamètre de 20,62 millimètres selon les normes habituelles. Dans le cas d'un connecteur à trois broches, ces dernières sont disposées à 120° l'une de l'autre. Pour un connecteur à quatre broches on ajoute une quatrième broche sur la même circonférence au milieu de deux des trois premières broches à 120° l'une de l'autre.Depending on the type of X-ray tube used, the connectors have 3 or 4 pins which are distributed over a circumference having a diameter of 20.62 millimeters according to the usual standards. In the case of a three-pin connector, the latter are arranged at 120 ° from one another. For a four-pin connector, add a fourth pin on the same circumference in the middle of two of the first three pins at 120 ° from each other.

Pour de nouveaux appareils de radiologie, on utilise des tubes à rayons X qui comportent, outre la cathode et l'anode, des électrodes appelées grilles qui servent à modifier le trajet du faisceau électronique émis par la cathode ou à le moduler ou encore à mieux le focaliser. Les tensions appliquées sur ces grilles peuvent être de quelques dizaines de volts à quelques kilovolts et il est donc nécessaire de prévoir leur alimentation par l'intermédiaire de connecteurs appropriés.For new radiology devices, X-ray tubes are used which include, in addition to the cathode and the anode, electrodes called grids which are used to modify the path of the electron beam emitted by the cathode or to modulate it or even better. focus it. The voltages applied to these grids can be from a few tens of volts to a few kilovolts and it is therefore necessary to provide for their supply via appropriate connectors.

Bien entendu, on peut ajouter un autre connecteur sur la paroi de la cuve de refroidissement pour l'alimentation de ces grilles mais une telle solution pose un problème d'encombrement et augmente le coût de l'ensemble.Of course, we can add another connector on the wall of the cooling tank to feeding these grids, but such a solution poses a problem of space and increases the cost of the assembly.

Le but de la présente invention est donc de réaliser un connecteur haute tension pour tube à rayons X qui comporte cinq broches de manière à alimenter par ce connecteur la cathode, deux filaments de la cathode et deux grilles.The object of the present invention is therefore to produce a high voltage connector for an X-ray tube which has five pins so as to supply this cathode with two cathode filaments and two grids.

L'invention concerne un connecteur haute tension pour l'alimentation de la cathode, de deux filaments de cathode et de deux grilles d'un tube à rayons X, caractérisé en ce qu'il comprend cinq broches, l'une pour alimenter la cathode, deux pour alimenter les filaments de la cathode et les deux dernières pour alimenter les deux grilles, la disposition des broches étant telle que la distance entre la broche de cathode et une broche de grille et celle entre les deux broches de grille sont plus grandes que celle entre une broche de cathode et une broche de filament de cathode.The invention relates to a high voltage connector for supplying the cathode, two cathode filaments and two grids of an X-ray tube, characterized in that it comprises five pins, one for supplying the cathode , two to supply the cathode filaments and the last two to supply the two grids, the arrangement of the pins being such that the distance between the cathode pin and a grid pin and that between the two grid pins is greater than that between a cathode pin and a cathode filament pin.

De préférence, les broches sont réparties sur une circonférence de manière que les broches de cathode et de filaments sont séparées angulairement par un angle qui est plus petit que celui séparant la broche de cathode de celle d'une grille ou que celui séparant les deux broches de grilles ou une broche de grille par rapport à la broche de filament la plus proche.Preferably, the pins are distributed over a circumference so that the cathode and filament pins are angularly separated by an angle which is smaller than that separating the cathode pin from that of a grid or that separating the two pins of grids or a grid pin relative to the nearest filament pin.

Ces différents angles sont tels que l'angle séparant les broches de cathode et de filament est de 60°environ et en ce que l'angle séparant une broche de grille de l'autre broche de grille ou de la broche de filament la plus proche est de 80° environ.These different angles are such that the angle separating the cathode and filament pins is approximately 60 ° and in that the angle separating one grid pin from the other grid pin or from the nearest filament pin is about 80 °.

Le connecteur haute tension comporte de manière habituelle une partie femelle et une partie mâle sous la forme chacun d'un tube cylindrique s'emboîtant l'un dans l'autre et est caractérisé en ce que la paroi interne du tube cylindrique de la partie mâle comporte cinq nervures longitudinales séparées de la même manière que les broches, lesdites nervures servant lors du montage, à centrer un câble et à guider les conducteurs dudit câble.The high-voltage connector usually comprises a female part and a male part each in the form of a cylindrical tube fitting one in the other and is characterized in that the internal wall of the cylindrical tube of the male part has five longitudinal ribs separated in the same way as the pins, said ribs being used during assembly, to center a cable and to guide the conductors of said cable.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description suivante d'un exemple particulier de réalisation, ladite description etant faite en relation avec les dessins joints dans lesquels :

  • - la figure 1 montre une vue en perspective cavalière des parties mâle et femelle d'un connecteur haute tension selon la présente invention ;
  • - la figure 2 est une vue en coupe longitudinale de la partie femelle du connecteur selon l'invention,
  • - la figure 3 est une vue en coupe longitudinale de la partie mâle du connecteur selon l'invention, et
  • - la figure 4 est une vue de face de la partie mâle du connecteur selon l'invention.
Other characteristics and advantages of the present invention will appear on reading the following description of a particular embodiment, said description being made in relation to the accompanying drawings in which:
  • - Figure 1 shows a perspective view of the male and female parts of a high voltage connector according to the present invention;
  • FIG. 2 is a view in longitudinal section of the female part of the connector according to the invention,
  • FIG. 3 is a view in longitudinal section of the male part of the connector according to the invention, and
  • - Figure 4 is a front view of the male part of the connector according to the invention.

Un connecteur haute tension pour tube à rayons X comprend (figures 1 et 2) une partie femelle 21 qui est fixée de manière étanche sur une paroi de la gaine et une partie mâle 22 qui est mobile et est fixée à l'extrémité d'un câble 23 comportant un certain nombre de conducteurs. Les parties femelle 21 et mâle 22 ont la forme de tubes cylindriques allongés 24 et 31 dont les dimensions sont telles que la partie mâle s'emboîte sans difficulté dans la partie femelle.A high voltage connector for an X-ray tube comprises (FIGS. 1 and 2) a female part 21 which is tightly fixed to a wall of the sheath and a male part 22 which is movable and is fixed to the end of a cable 23 comprising a certain number of conductors. The female 21 and male 22 parts have the form of elongated cylindrical tubes 24 and 31 whose dimensions are such that the male part fits easily into the female part.

Le tube cylindrique 24 de la partie femelle 21 est ouvert à une extrémité 25 pour recevoir la partie mâle 22 et est fermée à l'autre extrémité 26 pour porter les plots de connexion 27 au nombre de cinq selon l'invention. Chaque plot de connexion 27 (figure 2) traverse l'épaisseur de l'extrémité du tube 24 et comporte, côté intérieur au tube, un réceptacle 28 pour la fiche mâle du connecteur et, côté extérieur, une borne de connexion 29 classique par exemple du type à trou 30 et vis de serrage 20 pour fixer un conducteur électrique de liaison avec une électrode du tube à rayons X.The cylindrical tube 24 of the female part 21 is open at one end 25 to receive the male part 22 and is closed at the other end 26 to bring the connection pads 27 to the number of five according to the invention. Each connection pad 27 (Figure 2) crosses the thickness of the end of the tube 24 and comprises, inside the tube, a receptacle 28 for the male plug of the connector and, on the outside, a conventional connection terminal 29 for example of the type with hole 30 and clamping screw 20 for fixing an electrical conductor for connection with an electrode of the X-ray tube.

Le tube cylindrique 24 est terminé à l'extrémité ouverte 25 par une première collerette 32 de centrage du tube dans l'orifice de la paroi de la gaine et une deuxième collerette 33 d'appui sur ladite paroi par l'intermédiaire d'un joint (non représenté).The cylindrical tube 24 is terminated at the open end 25 by a first flange 32 for centering the tube in the orifice in the wall of the sheath and a second flange 33 for bearing on said wall by means of a seal. (not shown).

Le collerette 32 est munie extérieurement d'un détrompeur 34 pour définir sa position vis-à-vis de l'orifice dans la paroi ; la collerette 33 est munie extérieurement d'une première encoche 35 de repérage correspondant à la broche de cathode et intérieurement d'une deuxième encoche 36 pour définir la position de la partie mâle.The flange 32 is provided externally with a polarizer 34 to define its position with respect to the orifice in the wall; the flange 33 is provided externally with a first locating notch 35 corresponding to the cathode pin and internally with a second notch 36 to define the position of the male part.

Le tube cylindrique 31 de la partie mâle du connecteur est ouvert à une extrémité 37 (figure 3) pour recevoir le câble 23 et est fermé à l'autre extrémité 48 pour porter les fiches mâles 38 au nombre de cinq. Chaque fiche mâle comporte une embase creuse en son milieu pour recevoir un conducteur du câble 23. Cette embase a une forme hexagonale dont un pan vient en butée sur la paroi interne et se prolonge par un contact 45 en forme de cylindre de révolution qui est équipé de lamelles flexibles 46 réalisant le contact électrique avec le réceptacle 28 de la partie femelle. Au-dessus de l'embase, le contact est fileté sur une certaine longueur pour coopérer avec une bague de serrage 47. Chaque fiche mâle 38 est maintenue dans un orifice percé dans l'extrémité 48 par l'intermédiaire de la bague 47 qui se visse sur la partie filetée du contact 45.The cylindrical tube 31 of the male part of the connector is open at one end 37 (FIG. 3) to receive the cable 23 and is closed at the other end 48 to carry the male plugs 38 five in number. Each male plug has a hollow base in the middle to receive a conductor of the cable 23. This base has a hexagonal shape, a section of which abuts on the internal wall and is extended by a contact 45 in the form of a cylinder of revolution which is equipped flexible strips 46 making electrical contact with the receptacle 28 of the female part. Above the base, the contact is threaded over a certain length to cooperate with a clamping ring 47. Each male plug 38 is held in an orifice drilled in the end 48 by means of the ring 47 which screws onto the threaded part of contact 45.

Outre les cinq trous pour le passage des cinq fiches mâles, l'extrémité 37 présente deux autres trous, l'un 39 pour le remplissage d'un produit de surmoulage et l'autre 40 à usage d'évent pendant l'opération de surmoulage.In addition to the five holes for the passage of the five male plugs, the end 37 has two other holes, one 39 for filling an overmolding product and the other 40 for use as a vent during the overmolding operation. .

Le tube cylindrique 31 est terminé à l'extrémité ouverte 37 par une collerette 41 sur laquelle est sertie une virole 42 qui est en contact avec la tresse métallique 43 du câble 23. Cette virole permet de mettre à la masse la tresse métallique du câble.The cylindrical tube 31 is terminated at the open end 37 by a flange 41 on which is crimped a ferrule 42 which is in contact with the metallic braid 43 of the cable 23. This ferrule makes it possible to ground the metallic braid of the cable.

Au niveau de la collerette 41, la surface externe du tube 31 comporte un détrompeur 44 qui coopère avec l'encoche 36 du tube 24.At the level of the flange 41, the external surface of the tube 31 includes a polarizing device 44 which cooperates with the notch 36 of the tube 24.

La paroi interne du tube 31 comporte cinq nervures longitudinales 49 qui sont espacées angulairement de la même manière que les broches, chaque espace angulaire sur la paroi correspondant à une broche. Ces nervures servent, lors du montage du câble 23, d'une part, d'éléments de centrage et, d'autre part, de guidage des cinq conducteurs 56 à 60 du câble 23.The internal wall of the tube 31 has five longitudinal ribs 49 which are angularly spaced in the same way as the pins, each angular space on the wall corresponding to a pin. These ribs serve, when mounting the cable 23, on the one hand, for centering elements and, on the other hand, for guiding the five conductors 56 to 60 of the cable 23.

Pour le montage du câble 23 dans le tube 31, les conducteurs 46 à 50 sont d'abord préformés et soudés aux fiches 38. Puis le câble 23 est glissé dans le tube 31, les nervures 45 servant de guidage à chacune des fiches, de manière que les contacts des fiches 38 traversent les trous d'extrémité. La bague 47 est ensuite vissée sur la partie filetée de chaque fiche pour les bloquer en position. La virole métallique 42 qui a été placée autour du câble avant son montage dans le tube 31, est ensuite sertie autour de la tresse métallique 43 et de la collerette 41. Enfin, la dernière opération consiste à remplir par l'orifice 39 le volume interne du tube 31 par un produit de surmoulage 50 de manière à maintenir en place le câble 23 et les conducteurs 56 à 60 et à isoler ces derniers les uns des autres et par rapport à la masse.For mounting the cable 23 in the tube 31, the conductors 46 to 50 are first preformed and welded to the plugs 38. Then the cable 23 is slipped into the tube 31, the ribs 45 serving as a guide for each of the plugs, so that the contacts of the plugs 38 pass through the end holes. The ring 47 is then screwed onto the threaded part of each plug to lock them in position. The metallic ferrule 42 which has been placed around the cable before it is mounted in the tube 31, is then crimped around the metallic braid 43 and the flange 41. Finally, the last operation consists in filling through the orifice 39 the internal volume of the tube 31 by an overmoulding product 50 so as to hold the cable 23 and the conductors 56 to 60 in place and to isolate the latter from each other and from ground.

Selon l'invention, les plots de connexion 27, et donc les fiches de contact 38, sont répartis respectivement sur les extrémités des tubes 24 et 31 comme le montre la figure 5 qui est une vue de face des fiches de contact de la partie mâle 22. La fiche 51 correspond à l'alimentation haute tension de la cathode, de l'ordre de 70 kilovolts par rapport à la masse. La fiche 52 correspond à l'alimentation d'un filament de cathode pour obtenir un faisceau d'électrons donnant naissance à un foyer de rayons X de grandes dimensions. La fiche 53 correspond à l'alimentation d'un filament de cathode pour obtenir un faisceau d'électrons donnant naissance à un foyer de rayons X de plus petites dimensions. La fiche 54 correspond à la polarisation d'une première grille tandis que la fiche 55 correspond à la polarisation d'une deuxième grille.According to the invention, the connection pads 27, and therefore the contact plugs 38, are distributed respectively over the ends of the tubes 24 and 31 as shown in FIG. 5 which is a front view of the contact plugs of the male part 22. The plug 51 corresponds to the high voltage supply of the cathode, of the order of 70 kilovolts relative to the mass. The plug 52 corresponds to the supply of a cathode filament to obtain an electron beam giving rise to a large X-ray focus. The plug 53 corresponds to the supply of a cathode filament to obtain an electron beam giving rise to a focus of X-rays of smaller dimensions. The plug 54 corresponds to the polarization of a first grid while the plug 55 corresponds to the polarization of a second grid.

Les fiches 52 et 53 sont disposées à proximité de la fiche 51 car elles sont sensiblement au même potentiel que celui de la cathode, à quelques dizaines de volts près. Par contre, les fiches 54 et 55 doivent être écartées des fiches 51, 52 et 53 car elles sont à des potentiels qui sont différents de plusieurs kilovolts entre elles et par rapport à la haute tension. Il est donc recommandé que la distance entre la broche de cathode et une broche de grille et que celle entre les deux broches de grille soient plus grandes que celle entre une broche de cathode et une broche de filament.The plugs 52 and 53 are arranged near the plug 51 because they are substantially at the same potential as that of the cathode, to within a few tens of volts. On the other hand, the plugs 54 and 55 must be separated from the plugs 51, 52 and 53 because they are at potentials which are different from several kilovolts between them and with respect to the high voltage. It is therefore recommended that the distance between the cathode pin and a grid pin and that the distance between the two grid pins is greater than that between a cathode pin and a filament pin.

Sur la figure 5, les cinq fiches sont disposées sur une même circonférence ayant un diamètre égal aux normes habituelles respectées dans les connecteurs à 3 ou 4 broches, soit 20,62 millimètres. Par ailleurs, les cinq fiches sont réparties angulairement de manière que les fiches 51, 52 et 53 sont séparées par un angle de 60° environ tandis que les fiches 52, 53 54 et 55 sont séparées par un angle de 80°environ, ce qui permet de respecter les règles de distance indiquées ci-dessus.In FIG. 5, the five plugs are arranged on the same circumference having a diameter equal to the usual standards observed in the connectors 3 or 4 pins, or 20.62 millimeters. Furthermore, the five sheets are distributed angularly so that the sheets 51, 52 and 53 are separated by an angle of about 60 ° while the sheets 52, 53 54 and 55 are separated by an angle of about 80 °, which allows you to respect the distance rules indicated above.

Il est à noter que les valeurs du diamètre et des angles ne sont données qu'à titre indicatif et peuvent donc varier autour de ces valeurs.It should be noted that the values of the diameter and the angles are only given as an indication and can therefore vary around these values.

Claims (6)

1. Connecteur haute tension, notamment pour l'alimentation de la cathode, de deux filaments de cathode et de deux grilles d'un tube à rayons X, caractérisé en ce qu'il comprend cinq broches (27 ou 38), l'une 51 pour alimenter la cathode, deux (52, 53) pour alimenter les filaments de la cathode, et les deux dernières (54 ou 55) pour alimenter les deux grilles, la disposition des broches étant telle que la distance entre la broche (51) de cathode et une broche de grille (54 ou 55) et celle entre les deux broches de grille (54, 55) sont plus grandes que celle entre une broche (51) de cathode et une broche de filament de cathode.1. High voltage connector, in particular for supplying the cathode, two cathode filaments and two grids of an X-ray tube, characterized in that it comprises five pins (27 or 38), one 51 to supply the cathode, two (52, 53) to supply the filaments of the cathode, and the last two (54 or 55) to supply the two grids, the arrangement of the pins being such that the distance between the pin (51) cathode and a grid pin (54 or 55) and that between the two grid pins (54, 55) is larger than that between a cathode pin (51) and a cathode filament pin. 2. Connecteur haute tension selon la revendication 1, caractérisé en ce que les cinq broches sont réparties sur une circonférence telle que la broche de cathode (51) est disposée entre les deux broches des filaments (52, 53) et que les deux broches de grille (54, 55) sont disposées entre les deux broches de filaments (52, 53).2. High voltage connector according to claim 1, characterized in that the five pins are distributed over a circumference such that the cathode pin (51) is disposed between the two filament pins (52, 53) and that the two pins grid (54, 55) are arranged between the two filament pins (52, 53). 3. Connecteur haute tension selon la revendication 1 ou 2, caractérisé en ce que les broches de cathode (51) et de filaments (52, 53) sont séparées angulairement par un angle qui est plus petit que celui séparant la broche de cathode (51) de celle (54 ou 55) d'une grille ou que celui séparant les deux broches de grilles (54, 55) ou une broche de grille (54, 55) par rapport à la broche de filament (52 ou 53) la plus proche.3. High voltage connector according to claim 1 or 2, characterized in that the cathode pins (51) and filaments (52, 53) are angularly separated by an angle which is smaller than that separating the cathode pin (51 ) that of a grid (54 or 55) or that separating the two grid pins (54, 55) or a grid pin (54, 55) relative to the filament pin (52 or 53) most close. 4. Connecteur haute tension selon la revendication 3, caractérisé en ce que l'angle séparant les broches de cathode (51) et de filament (52, 53) est de 60° environ et en ce que l'angle séparant une broche de grille (54, 55) de l'autre broche de grille ou de la broche de filament (52, 53) la plus proche est de 80° environ.4. High voltage connector according to claim 3, characterized in that the angle separating the cathode (51) and filament pins (52, 53) is approximately 60 ° and in that the angle separating one grid pin (54, 55) from the other grid pin or the closest filament pin (52, 53) is about 80 °. 5. Connecteur haute tension selon l'une quelconque des revendications précédentes comportant une partie femelle (21) et une partie mâle (22) sous la forme chacune d'un tube cylindrique (24, 31) s'emboîtant l'un dans l'autre, caractérisé en ce que la paroi interne du tube cylindrique (31) de la partie mâle (22) comporte cinq nervures (49) longitudinales séparées angulairement de la même manière que les broches, lesdites nervures servant, lors du montage, à centrer un câble (23) et à guider les conducteurs (56 à 60) dudit câble équipés des fiches mâles (38) de manière que ces dernières se mettent en place dans les orifices de montage.5. High voltage connector according to any one of the preceding claims comprising a female part (21) and a male part (22) each in the form of a cylindrical tube (24, 31) fitting one into the other, characterized in that the internal wall of the cylindrical tube (31) of the male part (22) has five longitudinal ribs (49) angularly separated in the same way as the pins, said ribs serving, during assembly, to center a cable (23) and guide the conductors (56 to 60) of said cable equipped with male plugs (38) so that the latter are put in place in the mounting holes. 6. Connecteur haute tension selon la revendication 5, caractérisé en ce que le volume interne du tube cylindrique (31) de la partie mâle (22) est rempli d'un produit de surmoulage après le montage du câble (23) et de ses conducteurs (56 à 60) équipés des fiches mâles (38).6. High voltage connector according to claim 5, characterized in that the internal volume of the cylindrical tube (31) of the male part (22) is filled with an overmolding product after mounting the cable (23) and its conductors (56 to 60) fitted with male plugs (38).
EP90403120A 1989-11-24 1990-11-05 High voltage connector for X-ray tube Expired - Lifetime EP0430735B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8915507 1989-11-24
FR8915507A FR2655209B1 (en) 1989-11-24 1989-11-24 HIGH VOLTAGE CONNECTOR FOR X-RAY TUBE.

Publications (2)

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EP0430735A1 true EP0430735A1 (en) 1991-06-05
EP0430735B1 EP0430735B1 (en) 1994-01-26

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EP90403120A Expired - Lifetime EP0430735B1 (en) 1989-11-24 1990-11-05 High voltage connector for X-ray tube

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US (1) US5154638A (en)
EP (1) EP0430735B1 (en)
DE (1) DE69006331T2 (en)
FR (1) FR2655209B1 (en)

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Also Published As

Publication number Publication date
EP0430735B1 (en) 1994-01-26
FR2655209B1 (en) 1992-02-14
DE69006331D1 (en) 1994-03-10
DE69006331T2 (en) 1994-05-05
US5154638A (en) 1992-10-13
FR2655209A1 (en) 1991-05-31

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