CN201112322Y - Circular small-sized indicator tube for radar - Google Patents

Abstract

The utility model discloses a small and round index tube used for radar, which pertains to the field of electronic vacuum display devices and comprises a fluorescent screen, a tube funnel, a cavity cap which is positioned on the tube funnel. A glass tube below the tube funnel is internally provided with an electronic gun component. The inner wall of the cavity cap arranged on the tube funnel is coated with an inner graphite layer and the outer side of the periphery of the tube funnel is coated with an outer graphite layer. A metallic aluminum film is arranged on the place from the inner side of a fluorescent powder layer to the tube funnel; the electronic gun adopts the structure of a high potential and bipotential focusing electrode and the outgoing lines of each electrode of the electronic gun are protected by a metal protective jacket which is installed at the tail of the tube. Since the small and round index tube adopts the structure of the electronic gun, the strength and the ant-vibration performance of the tube body are enhanced and the resolution ratio is improved to meet the requirements of a radar indicator.

Description

The circular small-sized indicator tube that is used for radar

Technical field

The utility model belongs to the electric vacuum display device field, particularly a kind of circular small-sized indicator tube that is used for radar.

Background technology

The circular small-sized indicator tube of radar is the core display device of radar system, is used for airborne radar, does high brightness, high-resolution and high accuracy demonstration as airborne weather radar, shipborne radar, trailer-mounted radar and ground radar and ship for civil use radar.Scan mode is a circumference superposition mode.In prior art, because the composition and the structure of display tube are not ideal enough, often make indicator tube resolution not high, display sensitivity is affected.

The ordinary radar indicator tube is owing to adopt low unipotential gun, and focus voltage is 0V, and is non-adjustable, so resolution is lower, awaits improving and improving.This patent launches in conjunction with such task.

Summary of the invention

Technical problem to be solved in the utility model is: because radar indicator tube resolution in the past is not high, pipe structure intensity and antivibration ability can not meet the demands, in order to overcome these weak points, improve the resolution of indicator tube, the purpose of this utility model provides a kind of circular small-sized indicator tube that is used for radar, makes it satisfy the requirement of airborne radar to indicator tube.This purpose realizes with following technical scheme, a kind of circular small-sized indicator tube that is used for radar, and the cavity cap, the glass awl below glass-tube that comprise phosphor screen, glass awl, are positioned on the glass awl are equipped with electron gun parts; It is characterized in that: the glass awl is gone up set cavity cap; its inwall scribbles interior graphite linings; the glass awl periphery outside scribbles outer graphite linings; inboard to the glass awl that is positioned at phosphor powder layer is provided with aluminium film; described electron gun adopts high bipotential focus electrode structure, the metallic sheath protection that the lead-out wire of each electrode of electron gun is installed by the pipe tail.

Described electron gun adopts high bipotential focus electrode structure, the original nonadjustable 0V focusing electrode of ordinary radar indicator tube voltage is focused on make adjustable high focusing voltage focusing into, has improved the definition of indicator tube greatly; The high resiliency support that electron gun adopts the high-quality spring steel to make is fixed, each electrode is connected with metallic sheath by the stem stem exit, the inner guide wire of electron gun stem stem adopts bonding jumper to reinforce, on last anode, increased by eight latch spring bracing frames, adopt the face contact of whole circle limit and 8 support location, on eight latch spring bracing frames, be welded with two spring leafs again, by 8 strong points contact with whole circle limit face with the inner surface strong bonded of caliber together, effectively control the displacement of whole optics, improved the reliability of indicator tube greatly; The inboard that is positioned at phosphor powder layer is provided with aluminium film to the glass awl, and protection fluorescent material screen is unlikely is burnt by electron beam, and has increased the electric conductivity of screen.

The beneficial effects of the utility model are, because the small-sized indicator tube of this circle adopts above-mentioned electron gun structure, strengthened body intensity and resistance to shock, have improved resolution, have satisfied the requirement of radar indicator.

Description of drawings

Fig. 1 is the circular small-sized indicator tube structural representation that is used for radar;

Fig. 2 is above-mentioned indicator tube electron gun structure schematic diagram.

Embodiment

With reference to Fig. 1, represent the circular small-sized indicator tube structural representation that is used for radar described in the utility model, 1 is the phosphor screen of indicator tube front portion among the figure, be connected with glass awl 2 thereafter, scribble outer graphite linings 3 on the glass awl lateral surface, glass awl 2 is provided with anode cap 4, around anode cap, apply the last layer insulating barrier, the glass awl is gone up also has aluminium film 5, glass awl inboard extends to the tube neck inboard from anode cap and scribbles interior graphite linings 6, with the glass-tube of electron gun chucking partly be 7, internal electron rifle parts are 8, are positioned at terminal pipe tail metallic sheath 9 each electrode outlet line of sub-rifle that Connects Power.Each electrode outlet line of electron gun is protected.

With reference to Fig. 2, expression electron gun structure schematic diagram, described electron gun parts 8 comprises dull and stereotyped stem stem 8.1, four glass poles 8.2, cathode assembly 8.3, Wehnelt electrode 8.4, intensifying ring 8.5, focusing electrode 8.6 is characterized in that, is provided with a high bipotential focusing electrode 8.7 thereafter, connecting last anode 8.8, its periphery is provided with eight latch spring supports 8.9, and two latch spring sheets 8.10, and getter 8.11 is equipped with in electron gun termination portion, each electrode is fixing by four glass poles 8.2, on last anode, be welded with the eight latch spring supports 8.9 that contact with the tight face of neck internal diameter, rely on claw type shell fragment self elastic force to be fastened on the glass-tube tube wall, closely contact with interior graphite with two latch spring sheets 8.10 on it.Constituted the electron gun of this high bipotential focus voltage.

Claims (2)

1. a circular small-sized indicator tube that is used for radar comprises that cavity cap, glass awl below glass-tube that phosphor screen, glass are bored, are positioned on the glass awl are equipped with electron gun parts; It is characterized in that: the glass awl is gone up set cavity cap; its inwall scribbles interior graphite linings; the glass awl periphery outside scribbles outer graphite linings; inboard to the glass awl that is positioned at phosphor powder layer is provided with aluminium film; described electron gun adopts high bipotential focus electrode structure, the metallic sheath protection that the lead-out wire of each electrode of electron gun is installed by the pipe tail.

2. the circular small-sized indicator tube that is used for radar according to claim 1 is characterized in that described electron gun parts, be provided with a high bipotential focusing electrode again in the focusing electrode back, it is connecting last anode, and its periphery is provided with eight latch spring supports, and two latch spring sheets.

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