CN2390189Y - Automatic opening and closing point source radiation device - Google Patents

Abstract

The utility model relates to a point source irradiation device which comprises a point source, a source chamber, a beam limiting hole, a micro-motor, a limited switch and a ray switch valve, wherein the ray switch valve is a rotating body of which the middle is provided with a through groove, the rotating body is arranged between the point source and the beam limiting hole or under the point source and the beam limiting hole, and a special control circuit is used for controlling the ray switch valve to automatically open and close. The utility model has the advantages of simple structure and safe and convenient operation, and avoids accidental irradiation caused by that workers forget to close irradiation source.

Description

The point source discharger of automatic shutter

The utility model relates to a kind of point source discharger, belongs to uclear scale radiation source application.

At present the applied radioactive source of uclear scale has two kinds of point source and line sources, and the switching of these two kinds of source compartments all is to adopt manual mode.The point source of existing high energy radioactive source is to place very complicated chamber, the source rotation of structure beyond the Great Wall, and the switching of each radioactive source is difficult to return on the origin-location, so poor repeatability, has influenced the precision of uclear scale; The switching of existing low energy point source radiation chamber (as patent 952138980) is to reach the radioactive source bottom with hand Men Sai is screwed off or screws on, and in the process type of this switching, human body must be subjected to the radiation of ray, and this is that people are undesirable.

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of simple in structure, safe and convenient to use, the point source discharger that can open automatically or close according to need of work is provided.

Point source discharger of the present utility model, comprise point source, chamber, source, ray limit beam hole, beam switch valve, micromotor, limit switch, it is characterized in that: beam switch is the rotary body that a centre has groove, one end of this rotary body is connected with micromotor, the other end is provided with a plurality of holes or a polygonal hole, the end face of rotary body has a back-up ring, and rotary body can not moved axially.

The utility model has the advantages that simple in structure, safe and convenient to use, can automatic shutter, x radiation x dosage is stable, has guaranteed that uclear scale has very high precision.

Further this utility model is elaborated below in conjunction with accompanying drawing:

Fig. 1 is the synoptic diagram of point source recloser

Fig. 2 is the A-A sectional view of Fig. 1

Fig. 3 is the B-B sectional view of Fig. 1

Fig. 4 is the circuit theory diagrams of point source recloser

As depicted in figs. 1 and 2, point source 1 places the hole of chamber, source 2, ray penetrates from limit beam hole 3, ring washer 4 is positioned at an end of beam switch valve 5, the axial location of beam switch valve 5 is remained unchanged, this device is characterised in that: beam switch valve 5 is the rotary body that a centre has groove 6, and its end is connected with micromotor 10, and this micromotor rotations per minute is below 60 commentaries on classics; The other end of beam switch valve has been done a plurality of holes or a polygonal hole 11, places this Kong Zhongke manually to make the rotation of beam switch valve with specific purpose tool; The beam switch valve be in point source 1 and the limit beam hole 3 between or under so that control ray switching; 2 limit switches 7 and 8 are arranged in the device, become 90 ° of distributions with the rotation center of beam switch switch valve, as shown in Figure 3.When the groove 6 of rotary body is in Fig. 1 position shown in Figure 2, it is the operation duty of the uclear scale band conveyor of adorning, at this moment ray can radiate by limit beam hole 3, uclear scale is weighed, when band conveyor quits work, the micromotor energising, the beam switch valve is turned clockwise, driving lever 9 on the beam switch valve is also followed rotation together, and driving lever 9 contacts limit switch 7 when forwarding 90 ° to, and the micromotor outage is stopped the rotation, at this moment ray is by the two side shield of switch valve groove, thereby can not be by limit beam hole 3, just radioactive source is closed, and uclear scale stops to weigh.Carry out work if start band conveyor again, at this moment micromotor turn-on reversal electric current immediately, motor begins to be rotated counterclockwise, and drive beam switch valve 5 and driving lever 9 also is rotated counterclockwise, when driving lever rotates when contacting limit switch 8, micromotor cuts off the power supply again, rotation also promptly stops, groove 6 has been in shown position again, has just opened radioactive source, and uclear scale is weighed again.

When external circuit has a power failure, the micromotor power supply stops, open or close for making radioactive source, the hole 11 that an available specific purpose tool is dialled on beam switch valve 5 one ends with hand makes the rotation of beam switch valve, thereby groove 6 can be in vertical position (opening) or horizontal level (pass), and this is the hand switch mode of the utility model when having a power failure.

The utility model design has special control circuit, as shown in Figure 4, can control the just commentaries on classics of micromotor automatically by this circuit, reverses or stops.This circuit is characterised in that: only adopt three toggle switchs just can realize the switching of the automatic control switch and the hand switch of this device, and automatic control switch is to be controlled by the belt feeder rate signal voltage of uclear scale main frame output.The used micromotor 10 of this circuit is single-phase reversible permasyn morot.The working time of Electric Machine Control Push And Release is in 3 seconds, so the electrical power time is very short.When toggle switch was pulled out manual position, the available dedicated instrument opened or closed the source of penetrating, and this is that the utility model is in the hand switch form that has under the electric situation.

After adopting this utility model, can be with need of work automatic shutter radioactive source, i.e. radioactive source is opened during belt feeder work running, and when belt feeder stopped, radioactive source was closed automatically, thereby had strengthened the security of using radioactive source greatly.

Claims (5)

1, a kind of point source discharger of automatic shutter, comprise She Yuan, chamber, source, ray limit beam hole, micromotor, limit switch, back-up ring, beam switch valve, it is characterized in that: the beam switch valve is the rotary body that a centre has groove, one end of this rotary body is connected with micromotor, the other end has been done a plurality of holes or a polygonal hole, and two limit switches become 90 ° of distributions with the rotation center of beam switch valve.

2, automatic shutter point source discharger according to claim 1 is characterized in that the side bus of groove on the above-mentioned beam switch valve and ray limit beam hole side bus coincides or is in outside the bus of ray spacing hole side.

3, automatic shutter point source discharger according to claim 1, it is characterized in that the beam switch valve be in point source and the limit beam hole between or under.

4, automatic shutter point source discharger according to claim 1, the micromotor rotating speed that it is characterized in that beam switch valve one end is below per minute 60 changes.

5, automatic shutter point source discharger according to claim 1, it is characterized in that making the micromotor of beam switch valve automatic shutter by a special control circuit control, the feature of this circuit is: realize automatically and manual switchover with three toggle switch, and when controlling automatically, the forward and backward of its micromotor is voltage-controlled by the rate signal of band conveyor.

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