CN2053759U - Radiation measurement transducer - Google Patents

Abstract

The utility model relates to a radiation measurement transducer, in particular to measure of gamma radiation intensity. The utility model mainly comprises an upper flange, a bottom flange, a chassis, an electrode, an electrode insulated disc, a preamplifier, an insulating part, a 'O'-shaped rubber band, a multicore cable, an exhaust tube, etc. The utility model adopts multilayer electrode structure, enlarges the dimension of the insulator foot, add a damp-proof glaze coating, and provides a transition stainless steel insulator seat between the insulator foot and the flanges. The utility model uses carbon steel for increasing the impact strength and the dielectric strength. The utility model has the advantages of low cost, easy manufacturing, etc. The utility model can be used for measuring the nuclear radiation strength in the nuclear radiation device, in particular to the measure of gamma radiation.

Description

Radiation measurement transducer

The utility model relates to measures the sensor that the γ radiation is used, and is the measurement mechanism that belongs to the radioactive ray field of measuring technique.

Become known for measuring gamma-emitting same type of sensor at present, the product that is provided as U.S. Jia Rui company (KAY-RAY INC) and moral gram Long Si nucleon company (TEXAS NUCLEAR INC) is to adopt stainless steel cylinder as urceolus, inside is to adopt single layer structure, and the signal transmission realizes by a kind of special cable.Similar survey sensor only had development and use in some R﹠D institutions at home also not as commodity production, but the general carbon steel outer that adopts, the stainless steel blind flange, inside is to adopt three-decker, insulator is small-sized no base, does not also have moistureproof glaze.Above-mentioned external product adopts all steel urceolus, costs an arm and a leg, and processing difficulties, and also the single layer structure detection sensitivity is low, because signal output does not have pre-the amplification, so output signal is too little.Its two end flanges of the sensor of domestic trial-production is still used stainless steel, also has to cost an arm and a leg the problem of processing difficulties, and shortcoming such as the insulator volume that is adopted is little, does not have moistureproof glaze again, therefore also exists dielectric strength not high, and the yield rate of welding is low.

The sensor that the utility model proposed has been analyzed above-mentioned shortcoming from structure, the urceolus and the flange that adopt full carbon steel to electroplate, and inside is designed to multi-layer electrode structure, can utilize the sensitivity space more fully, and output signal is strengthened, and has improved detection sensitivity.Next porcelain insulator enlarged diameter, and coat moistureproof glaze in the insulator periphery.Increase a base in the insulator bottom, make insulator dielectric intensity, moistureproof ability and solder yield are obtained significant raising.

The purpose of this utility model is to propose a kind of to the existing improved structure of gamma-emitting sensor of surveying, it is to adopt multi-layer electrode structure, and add a base in insulator bottom, and be coated with the improvement that realizes performance with moistureproof glaze in the insulator periphery, and full carbon steel electroplating processes is all adopted at whole urceolus and both ends, the stainless steel structure that adopts in the replacement prior art, thus the cost of sensor and the difficulty of processing reduced.

Accompanying drawing 1 is the synoptic diagram of the measuring radiation sensor that proposes of the utility model.

Accompanying drawing 2 is structural representations of ceramic insulation subdivision in the accompanying drawing 1.

Accompanying drawing 3 is principle schematic that sensor is used for microcomputer nuclear scale.

To described in the utility model, the structural principle of sensor is further described below below in conjunction with accompanying drawing:

As shown in Figure 1: flange in the bottom 1, outer protection tube 4, upper flange 10 all adopts carbon steel outside electronickelling protective layer. Chassis 2 and top bottom-disc 13 can be made with carbon steel or aluminium and other metal material. Electrode insulation lid the 3, the 9th is made with insulating materials. Insulator is by ceramics pole 15, and insulator foot 14 and insulator loam cake 16 form, and are coated with on the ceramics pole with moistureproof glaze. Preamplifier 12 places prechamber, and " O " shape sealing ring 19 is arranged, and screws on screw in compression to guarantee sealing with before putting hush panel 18. Signal output is to transfer out by many stamens cable block 21 and external cable. Cable block also adopts " O " shape sealing ring 20 and hush panel 18 sealings. Blast pipe 22 supplies vacuum exhaust and is charged into inert gas to use, and just welds behind the gas of substituting the bad for the good, and argon arc welding is all adopted in welding. Before put and put in the tube 17 before being fixed on by collet 11.

The principle of work of the sensor is: when gamma-rays incided sensor, it got electronic secondary at cylindrical wall and electrode on (as electrode among Fig. 15,6,7,8), and electronic secondary produces ionization in inert gas, and it is right to generate negative ions.Two electrodes are one group of sensor, one electrode is added with high pressure, and under the electric field action of two interpolars, the opposite polarity electrode direction of negative ions subtend moves, therefore produce electric current on the loop, current generated size is proportional to the radiation intensity of incident.

Fig. 2 is the porcelain insulator structural representation: comprising last extraction pole 23, and ceramics pole 15, moistureproof glaze 24, following 14 in insulator, stainless steel transition insulator block 25, insulating sleeve 26.Moistureproof glaze 24 adopts a kind of moisture-proof coating, porcelain insulator is of a size of the insulated column that ∮ 8 * 28mm to ∮ 15 * 32mm preferably adopts ∮ 10 * 30mm, different than prior art insulated column shape with physical dimension, the increasing of physical dimension, post intensity is increased, insulation resistance and intensity all increase, thereby have improved anti-impact force and proof voltage intensity.The change of shape is the protection step of a step, has strengthened charge pressure intensity.Be provided with insulator foot 14 in ceramics pole 15 bottoms, it adopts kovar alloy to make, stainless steel transition insulator block 25 is set between insulator foot 14 and the upper flange 10, adopt this structure can make flange material adopt common carbon steel to replace stainless steel, thereby reduced cost and difficulty of processing.

Also represented the multistage electrode structure that the utility model adopted among Fig. 1, i.e. the first, the second, the third and fourth electrode of representing as the usefulness 5-8 that is adopted among the figure.The increase of number of electrodes will need to guarantee the consistance of structure, adopt assurance mechanically when design, make each electrode have concentric step and guarantee the structure unanimity.

Filling with inert gas argon or xenon in sensor are to obtain long-term stable operation.

Embodiment:

Application example when sensor of the present utility model being described below being used for microcomputer nuclear scale; the principle schematic of microcomputer nuclear scale as shown in Figure 3; wherein gamma emitter 27, material conveyor 29, radiation sensor 30; support 28; protection tube 31, computer interface 32, microcomputer 33; display 34, printer 35.See Fig. 3, microcomputer nuclear scale is equipped with a radiation source 27 and support 28 material conveyors 29 are installed in source 27 and support 26 bottoms.Do not need to contact material and just can measure the transmission flow of material on conveyor.Measure material in course of conveying by γ radiation sensor 30, The change of radiation intensity.The relation of this variable quantity and mass flow size can be input in the computing machine by computer interface, by the software computing, calculates the instantaneous flow and the cumulative amount of conveyor transmission material, directly is presented on the display, and gets measurement result with printer.The physical dimension format diameter of used sensor is by 489-180mm, and length is by between the 500-2500mm.The normal at present specification that adopts has ∮ 158mm * 500mm, ∮ 158mm * 800mm, and ∮ 158mm * 1100mm, and, ∮ 158mm * 1400mm.Etc. several wherein preceding paragraphes is the sensor diameter, and consequent is sensor length.Scribble moistureproof organosilicon coating at insulator surface, improve humidity resistance.Fill in the sensor with anticyclonic inert gas argon (99.999%) or xenon (99.99%).

Above-mentioned actinometry sensor, be particularly useful for gamma-emitting measurement, can be designed to have the sensor of different length and diameter according to user's needs, its follow-up electronics equipment can be general hardware device, can also design various γ radiation application devices with the Strength Changes that software coupled computer measurement γ radiation effects produces in material, as uclear scale

The continuous material level meter, Level-sensing device, γ densitometer and γ thickness meter etc. can be widely used in the nuclear radiation measurement field.

Claims (6)

1; a kind of actinometry sensor; mainly comprise top; flange in the bottom 1; 10, chassis 2, electrode insulation lid 3; outer protection tube 4; electrode 5; 6; 7; 8, top electrode insulating lid 9, prime amplifier 12; top bottom-disc 13; ceramic insulation parts 14; 15; 16, preceding tube 17, the preceding hush panel 19 of putting of putting; " 0 " shape rubber band 19; 20; many stamens cable block 21 and gas outlet 22 is characterized in that described electrode adopts multi-layered electrode, as first electrode 5; second electrode 6; third electrode 7, the four electrodes 8, described ceramic insulation parts comprise insulator foot 14; ceramic insulation post 15; with the insulator loam cake, on described insulated column 15 peripheral surfaces, be coated with moistureproof glaze 24, be provided with insulator foot 14 in the bottom of ceramic insulation post 15; flange material adopts stainless steel transition insulator block 25 between base 14 and the upper flange 10, so that can replace stainless steel with plain carbon steel.

2, actinometry sensor as claimed in claim 1 is characterized in that described insulated column outside is coated with moistureproof glaze or organic moisture-proof coating, as is coated with organosilicon coating.

3, as claim 1,2 described actinometry sensors is characterized in that described insulator is of a size of ∮ 8 * 28mm to ∮ 15 * 32mm, preferably adopts ∮ 10 * 30mm.

4, actinometry sensor as claimed in claim 1 is characterized in that described electrode is a multi-layered electrode, and the consistance on each electrode structure is to adopt to guarantee that mechanically each electrode has concentric step and guarantees.

5, as claim 1,2,4 described actinometry sensors, it is characterized in that the physical dimension specification of described sensor: diameter is by between the ∮ 89-φ 180mm, and length is by between the 500-2500mm, and optimum dimension is ∮ 158 * 500～1400mm.

6, actinometry sensor as claimed in claim 5 is characterized in that filling in the described sensor with anticyclonic inert gas argon (99.999%) or fills with xenon (99.99%).

Images