JP5225174B2 - Neutron survey meter auxiliary equipment - Google Patents

Description

  The present invention relates to a measuring device auxiliary device, and more particularly to a measuring device auxiliary device for performing measurement by bringing a measuring device close to or in contact with an object to be measured in a building.

  There are many types of measuring instruments, and their shapes, weights, etc. vary depending on the application. For example, in nuclear power plants, research laboratories, hospitals, etc., radiation measuring devices for measuring radiation are used. Among them, a neutron survey meter for measuring neutron beams measures a neutron dose equivalent rate in a leaky neutron field such as a nuclear facility or an accelerator, and is a necessary device for safety management and the like. With regard to this type of measuring equipment, the penetration rate has improved remarkably, and it is easy and easy to confirm whether the calibration constants attached to the neutron survey meter can be used continuously without the need for special facilities such as radiation shielding rooms. A verification calibrator that can perform this is provided (Patent Document 1).

  FIG. 6 is a schematic perspective view for explaining the usage of the neutron survey meter. The neutron survey meter 30 has a shoulder belt 30c attached to a main body 30a, and an operator hangs the neutron survey meter 30 from his / her shoulder and makes a part of the main body 30a abut on an object to be measured, for example, a pipe 40. The neutron beam emitted from the pipe 40 is measured. In addition to the case where the measurement is performed in contact, neutron beams in the atmosphere may be measured. In that case, a neutron survey meter is installed in the atmosphere. The measured result is displayed on the display unit 30b. The neutron beam is measured by a proportional counter built in the main body 30a, and the measurable range is determined by the accuracy of the built-in proportional counter.

JP 2005-265765 A

  Normally used neutron survey meters have a built-in proportional counter inside, and are inevitably large in order to accurately measure neutron beams, and weigh about 10 kg. Therefore, there is a risk that the neutron survey meter may fall off the shoulder while the worker is taking measurements on the shoulder for a long time. If it falls, the measuring instrument is damaged and a safety problem occurs. Further, when measuring an object to be measured at a high place, there is a problem that work efficiency is poor because the work is performed by lifting the neutron survey meter. Along with this, there is a problem in that accurate measurement cannot be performed because the neutron survey meter is separated from the measurement target when the measurement target is to be in contact with the measurement target.

The present invention has been made in view of the above problems, and its purpose is to perform measurement work easily and safely when measuring a heavy neutron survey meter in contact with or close to an object to be measured. An object of the present invention is to provide an auxiliary device for a neutron survey meter that can be used.

In order to achieve the above object, the neutron survey meter auxiliary device according to claim 1 comprises:
In a neutron survey meter auxiliary device for performing measurement by bringing a neutron survey meter close to or in contact with an object to be measured in a building, a length corresponding to at least the measurement height position of the neutron survey meter from the floor of the building A stick-shaped main body portion, a stick-shaped moving body that is provided on the stick-shaped main body portion and can be reciprocated with the stick-shaped main body portion as a movement axis, and a moving mechanism portion for reciprocating the stick-shaped moving body And a mounting table on which the neutron survey meter can be placed , the stick-shaped main body is configured as a cylindrical body, and the stick-shaped moving body is The moving mechanism portion is provided so as to be slidable within the cylindrical body, and the moving mechanism portion includes a rack portion configured on the stick-like moving body and the stick. A positioning stopper that determines the height position of the mounting table, a lock mechanism that locks the movement of the movable body, and a gripping part that prevents malfunction of the positioning stopper. The mounting table has a plurality of holes formed on the entire surface, a substantially vertical wall portion is provided at the edge, and a lower end portion of the stick-like main body portion is configured by a buffer member such as rubber. An anti-slip portion is provided, and the measurement is performed by holding the main body portion substantially perpendicular to the floor surface in the building, placing the neutron survey meter on the mounting table, and moving the neutron survey meter by the moving mechanism portion. The positioning stopper and the lock mechanism are operated for a predetermined time in a state where the object to be measured is close to or in contact with the object to be measured.

  According to this configuration, the mounting table is attached to the tip of the stick-shaped moving body that reciprocates the stick-shaped main body, and the measuring device mounted on the mounting table has a precise height position from the floor surface. Can be adjusted. And the weight of a measuring device will be applied to a stick-shaped main-body part. Therefore, the operator does not lower the heavy measuring instrument from the shoulder or hold it by hand, but touches the measuring instrument against the object to be measured while supporting the measuring instrument auxiliary device on which the measuring instrument is placed. Alternatively, measurement can be performed in a close state. Moreover, since the main body has a stick shape, the measuring device auxiliary device can be easily carried to the measurement position of the next object to be measured. Therefore, it is possible to easily and safely perform the measurement work using the measuring device.

Further, the stick-shaped main body portion is configured as a cylindrical body, the stick-shaped moving body is provided so as to be slidable within the cylindrical body, and the moving mechanism section includes a rack portion configured as a stick-shaped moving body, Since it includes a pinion gear section provided on the stick-shaped main body, a mechanism for adjusting the height of the mounting table can be easily realized by the rack section and the pinion gear section, and the mounting table can be moved up and down smoothly. It becomes. Therefore, since the configuration is simple, the cost of the neutron survey meter auxiliary device as a whole can be kept low.

Furthermore, since the mounting table has a plurality of holes formed on the entire surface , the mounting table can be made lightweight.

Furthermore, since a non-slip portion made of a cushioning member such as rubber is provided at the lower end of the stick-shaped main body , the neutron survey meter auxiliary device on which the neutron survey meter is placed is It is possible to prevent the vehicle from toppling over and to reduce the influence of vibration from the floor surface. Therefore, it is possible to perform measurement work safely.

According to the neutron survey meter auxiliary device of the present invention, the mounting table is attached to the tip of the stick-shaped moving body that reciprocates the stick-shaped main body, and the neutron survey meter mounted on the mounting table is The position can be adjusted precisely. Therefore, the operator does not lower the heavy neutron survey meter from the shoulder or hold it by hand, but supports the neutron survey meter auxiliary device on which the neutron survey meter is placed while holding the neutron survey meter against the object to be measured. Alternatively, measurement can be performed in a close state. Moreover, since the main-body part is sticky, it can be easily carried to the measurement position of the next to-be-measured object. Therefore, the measurement work by the neutron survey meter can be performed easily and safely, and the reliability of the measured value measured in this way is also improved.

It is a whole perspective view of the neutron survey meter auxiliary device of the present invention. It is an expansion perspective view of the moving mechanism part of the neutron survey meter auxiliary | assistance apparatus of FIG. It is an expansion perspective view of the mounting base of the neutron survey meter auxiliary | assistance apparatus of FIG. It is an expansion perspective view of the anti-slip | skid part of the neutron survey meter auxiliary | assistance apparatus of FIG. It is a schematic perspective view which shows a mode that the neutron survey meter was mounted in the mounting base of the neutron survey meter auxiliary | assistance apparatus of FIG. It is explanatory drawing which shows the mode of the measurement operation | work by a neutron survey meter.

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an overall perspective view of a neutron survey meter auxiliary device according to the present invention. FIG. 2 is an enlarged perspective view of the moving mechanism unit of FIG. FIG. 3 is an enlarged perspective view of the mounting table. FIG. 4 is an enlarged perspective view of the anti-slip portion.

The neutron survey meter auxiliary device 10 includes constituent elements such as a stick-shaped main body 12, a stick-shaped moving body 14, and a mounting table 16. Hereinafter, each component will be described.

  As shown in FIGS. 1 and 2, the stick-shaped main body portion 12 has a hollow cylindrical tubular body portion 12a having a predetermined length, and the stick-shaped moving body 14 is vertically moved in the tubular body portion 12a. Is configured to reciprocate. A movement mechanism portion 18 described later is provided at the upper end portion of the cylindrical body portion 12a, and a non-slip portion 20 described later is provided at the lower end portion.

  The stick-shaped moving body 14 is a cylindrical member formed substantially the same as the length of the cylindrical body portion 12a. The stick-shaped moving body 14 is inserted into the cylindrical body portion 12a and configured to reciprocate up and down. ing. Therefore, a rack portion 14a for adjusting the amount of protrusion from the cylindrical body portion 12a is formed in the vertical direction (longitudinal direction) of the stick-like moving body 14. In addition, a groove portion 14b is also formed in the longitudinal direction of the stick-like moving body 14 so that it can move up and down smoothly in the cylindrical body portion 12a. Correspondingly, a projection (not shown) that is loosely inserted into the groove 14b is formed in the cylindrical body 12a in the longitudinal direction thereof, and the smooth movement of the stick-like moving body 14 is thereby achieved. Reciprocating movement is realized. A mounting table 16 described later is attached and fixed to the upper end portion of the stick-like moving body 14.

  The moving mechanism portion 18 is provided at the upper end of the cylindrical body portion 12a, and adjusts the amount of protrusion of the stick-shaped moving body 14 from the cylindrical body portion 12, that is, the height of the mounting table 16, and a predetermined height position. It is for fixing with. The moving mechanism 18 includes an adjustment handle 18a, a positioning stopper 18b, and a lock mechanism 18c. The adjustment handle 18a is configured to rotate in conjunction with a pinion gear portion (not shown) that meshes with the rack portion 14a formed in the longitudinal direction of the stick-shaped moving body 14 described above. When rotating in the direction indicated by the arrow A, the pinion gear portion rotates, and the stick-like moving body 14 having the rack portion 14a is moved up and down by the rotation of the pinion gear portion.

  The positioning stopper 18b is configured so that the pinion gear cannot be rotated by operating the positioning stopper 18b. The positioning stopper 18b can be turned ON or OFF by operating in the direction indicated by the arrow B in FIG. When the positioning stopper 18b is brought closer to the cylindrical body 12a side of the stick-shaped main body 12, the positioning stopper 18b is in an OFF state, and the adjustment handle 12a is in a rotatable state. When moved away from the cylindrical body 12a, the positioning stopper 18b is turned on, the rotary handle 18a cannot rotate, and the height position of the mounting table 16 cannot be changed. The lock mechanism 18c is rotatable in the direction of arrow C in FIG. 2, and by rotating clockwise, the stick-like moving body 14 and the cylindrical body portion 12a are firmly tightened, and the stick-like moving body 14 is It becomes a fixed state.

  A gripping portion 19 is formed outside the positioning stopper 18b of the moving mechanism portion 18 so as to cover the positioning stopper 18 from the outside to prevent malfunction and to hold and fix the stick-shaped main body portion 12 by hand. ing. When the height position of the mounting table 16 is adjusted, it can be performed while gripping the grip portion 19.

  A mounting table 16 is attached to the upper end of the stick-shaped moving body 14 (see FIGS. 1 and 3). This attachment is performed by bolts or the like. It can also be attached by welding or the like. A plurality of opening holes 16 a are formed in the mounting table 16 so that the weight of the mounting table 16 is reduced. However, when the strength is first, it is not necessary to form the opening hole. In addition, substantially vertical wall portions 17a, 17b, 17c, and 17d having a predetermined height are formed at the edge of the mounting table 16, so that the measuring device mounted on the mounting table 16 is not easily dropped. ing. Further, a non-slip mat 18 is laid on the entire surface of the mounting table 16 to stabilize the measuring instrument mounted thereon.

  An anti-slip portion 20 made of a cushioning member such as rubber is formed at the lower portion of the cylindrical body portion 12a of the stick-shaped main body portion 12 (see FIGS. 1 and 4). The non-slip portion 20 is configured to be fitted into the lower end portion of the cylindrical body portion 12a, and has an unevenness on the side that comes into contact with the floor surface or the like. When the lower end portion of the stick-like main body portion 12 is in contact with the floor surface by the anti-slip portion 20, the stick-like main body portion is caused by the large frictional force of the anti-slip portion 20 even though the contact cross-sectional area is small. 12 prevents slipping and falling. Further, since it is constituted by the buffer member, it is possible to prevent the influence of vibration from the floor surface or the like and to perform precise measurement by the measuring device mounted on the mounting table 16.

FIG. 5 is a schematic perspective view showing a state in which the neutron survey meter 30 is mounted on the mounting table 16 of the neutron survey meter auxiliary device 10 of the present invention. The neutron survey meter 30 is placed on the anti-slip mat 18 laid on the placing table 16. Here, the neutron survey meter is provided with a foot portion that prevents rolling when placed on a flat surface, and the neutron survey meter 30 is in a stable state on the placing table 16 by the foot portion and the non-slip mat 18. Set to

The case where the neutron survey meter auxiliary device 10 of the present invention is used to measure neutron beams at various locations in a nuclear reactor power plant will be described. First, the neutron survey meter auxiliary device 10 is carried into a place where an object to be measured is present. The neutron survey meter 30 is mounted on the mounting table 16 while the anti-slip portion 20 of the stick-like main body portion 12 is applied to one place on the floor surface and the stick-like main body portion 12 is supported by hand. The positioning stopper 18b is in the OFF state, the lock mechanism 18c is in the released state, and the adjustment handle 18a of the moving mechanism portion 18 is rotated while the stick-shaped main body portion 12 or the mounting table 16 is continuously supported by hand, so that the height position is adjusted. adjust. When it is necessary to bring the neutron survey meter 30 into contact with the object to be measured, the adjustment handle 18a of the moving mechanism 18 is rotated until the neutron survey meter 30 comes into contact with the object to be measured. Thereafter, the positioning stopper 18b is turned on, and the lock mechanism 18c is brought into the locked state. Thus, after setting the neutron survey meter auxiliary device 10 on which the neutron survey meter 30 is placed, the neutron beam is measured for a necessary time.

Here, the stick-shaped main body portion 12 has a cylindrical body portion 12a, and the anti-slip portion 20 is provided at the lower end portion thereof. Even if it exists, it is possible to measure with the neutron survey meter auxiliary | assistance apparatus 10 of this invention. This is because the bottom portion of the stick-like main body portion 12 is not attached with a place such as a carriage, and the stick-like main body portion 12 can be measured even when it is slightly inclined. It depends. Although the stick-shaped main body 12 is provided with the gripping portion 19, another gripping portion, for example, an annular shape or a rod-shaped protrusion, may be provided on the cylindrical body portion 12a as necessary. Moreover, you may comprise so that the measurement apparatus mounted in the mounting base 16 may be fixed with a belt etc. as needed.

According to neutron survey meters assist device of the present invention, because it was constructed using the mounting table and the stick-shaped main body portion and a stick-shaped mobile operator has by and hand lowering the neutron survey meters are heavy Shoulders There is no need, and the measurement height position of the neutron survey meter can be adjusted precisely, and the measurement operation can be performed easily and safely. Further, the neutron survey meter auxiliary device is lightweight and movable. Therefore, the work efficiency and work quality of measurement by the neutron survey meter are improved, and the safety is enhanced. In addition, the reliability of the measured value is improved.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the stick-shaped moving body and the cylindrical body portion of the stick-shaped main body portion that accommodates the stick-shaped moving body are those having a substantially circular cross section, but may be rectangular. Furthermore, the planar shape of the mounting table may be circular instead of rectangular.

The neutron survey meter auxiliary device of the present invention is particularly suitable for measurement using a neutron survey meter in a nuclear power plant, but can also be applied to other work that needs to hold a heavy object at a required height position. Is possible.

10 Neutron Survey Meter Auxiliary Device 12 Stick-like Main Body 12a Tubular Body 14stick-like Moving Body 14a Rack 14b Groove 16 Mounting Base 16a Opening Holes 17a, 17b, 17c, 17d Wall 18 Moving Mechanism 18a Adjustment Handle 18b Positioning Stopper 18c Lock mechanism 19 Grasping part 20 Non-slip part 30 Neutron survey meter 30a Main body part 30b Display part 30c Shoulder belt 40 Object to be measured

Claims (1)

In the neutron survey meter auxiliary device for measuring by bringing the neutron survey meter close to or in contact with the object to be measured in the building,
A stick-shaped main body having a length corresponding to at least the measurement height position of the neutron survey meter from the floor of the building;
A stick-shaped moving body provided on the stick-shaped main body and capable of reciprocating around the stick-shaped main body as a movement axis;
A moving mechanism for reciprocating the stick-like moving body;
A mounting table provided at the tip of the stick-shaped moving body, on which the neutron survey meter can be mounted ;
The stick-shaped main body is configured as a cylindrical body,
The stick-shaped moving body is slidably moved in the cylindrical body,
The moving mechanism portion includes a rack portion configured on the stick-like moving body and a pinion gear portion provided on the stick-like main body portion, and a positioning stopper that determines the height position of the mounting table and the stick-like shape A lock mechanism that locks the movement of the moving body and a gripping portion that prevents malfunction of the positioning stopper;
The mounting table has a plurality of holes formed on the entire surface, and a substantially vertical wall is provided at the edge.
At the lower end of the stick-like main body, a non-slip portion made of a cushioning member such as rubber is provided,
The measurement is
The main body is held substantially perpendicular to the floor in the building, the neutron survey meter is placed on the mounting table, and the neutron survey meter is brought close to or in contact with the object to be measured by the moving mechanism. A neutron survey meter auxiliary device, wherein the positioning stopper and the lock mechanism are operated in a state for a predetermined time.

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