CN102222530A - Nuclear radiation shieling lead clothes and production method thereof - Google Patents

Abstract

The invention discloses nuclear radiation shieling lead clothes and a production method thereof, relating to an anti-nuclear radiation technology. The production method comprises the following steps of: uniformly laying lead fiber yarns with diameters between 0.1 and 0.3 millimeter in a wood mold to form a lead fiber yarn sheet; taking the shaped lead fiber yarn sheet out and spraying a natural rubber adhesive; putting the lead fiber yarn sheet on which the natural rubber adhesive is sprayed into a metal mold, treating under the vulcanizing pressure condition 300 kilograms at the temperature between 160 and 200 DEG C in a high-temperature vulcanizing machine for 350-450 seconds, cooling to normal temperature and taking a vulcanized chip out; and sewing the chip in a textile fabric to obtain the lead clothes. The method has a simple and reasonable process, and is easy for production and manufacturing; the lead clothes or a lead screen has low material consumption, is convenient to wear, and has high durability; and the field irradiation time can be saved by 50 percent for maintenance personnel.

Description

Plumbous clothing of nuclear radiation shield and production method thereof

Technical field

The present invention relates to examine radiation protection technology, use the material production technical field especially for what make plumbous clothing that radiation proof uses or lead shield inner bag.

Background technology

Studies show that, the external exposure line of nuclear power station is mainly gamma-rays, it is mainly from the fission product of nuclear reaction with by the pipeline of neutron activation and valve, because the appearance of activation corrosion product in the pipeline, cause the deposition of radioactive particulate in the pipeline, make control zone a lot of upkeep operation site surrounding dosage higher, increased staff's external irradiation dose, general employing shielding is removed.Therefore, on shielding material is selected, make every effort to highly effective and safe, low cost and save the space, select steel, lead, normal concrete and loaded concrete etc. usually.The intensity of steel is better, but price is higher; Concrete more cheap than heavy metal, but density is little, and shielding thickness is big; Plumbous advantage be density height, fusing point low, anti-corrosion, to gamma-rays good adsorption is arranged and be difficult for by through characteristic, be easy to cast and relative shielding thickness less, so lead is the shielding material of first-selection.

At present, China is at the nuclear power station of operation, the shielding goods (plumbous clothing or lead shield) that control zone biological shielding system adopts mainly are: " the no gap solid metal block shape stereotype " of roll forming, this metal stereotype exist that lead equivalent is low, conformal performance can be poor, the generation waste material is many, resource utilization is not high; The product heaviness, it is big to cause shielding operation labor intensity, and staff's exposure time is long, dosage is big, easily causes heat-insulation layer distortion, tenesmus, and the control zone roentgen dose X increases, and safety coefficient is low, and potential risk is big; Be not suitable for special-shaped equipment such as pipeline, valve and personnel's shielding; And be difficult for decontamination, drawback such as serviceable life is short.Therefore, stereotype shielding goods are difficult to compatibility, sustainable development of incompatibility nuclear industry and the needs that people-oriented on shield effectiveness and structure function.

Studies show that anti-nuclear radiation biological shielding goods also must possess good physical and mechanical property (obdurability, thermal stability etc.) except that will having higher shield effectiveness.It is reported that current, the material and the goods that are used for anti-nuclear radiation biological shielding mainly contain following four classes.One class is based on general industry lead, the no gap derby shape stereotype of roll extrusion or moulding by casting, lead brick, sheet lead concrete etc.; Second class is based on lead powder, and rubber, polyethylene foam etc. are as mixed flexible article and coating, the tackifier etc. that are composited of base-material; The 3rd class be with no gap derby shape sheet lead as heart, ectonexine coats crosslinked foaming material and the continuous synthetic fibre material product of synthetic rubber; The 4th class is to make light-weight high-strength materials such as cenosphere with heavy metals such as lead.Facts have proved that although stereotype, the anti-nuclear radiation effect of sheet lead goods are preferable, use amount is big when building shielding harness, it is big to build difficulty, inefficiency, and it is many to produce waste material, and potential risk is big; And stereotype goods conformal performance is poor, can not bend, and is not suitable for the shielding of special-shaped equipment such as pipeline, valve, and careless manipulation easily drops and hurts sb.'s feelings or damage equipment.And mixed goods, coating and the tackifier that is composited of lead powder and rubber, polyethylene foam-material, though have certain flexibility, but because the lead powder particle easily gathers, be difficult in base-material evenly mixed, so shielding properties is inhomogeneous, and lead equivalent is low, rubber and tygon etc. are easily aging, influences shield effectiveness, brings by the danger of radiation to the staff.The cenosphere light-weight high-strength material that heavy metals such as lead are made, though anti-nuclear radiation performance is excellent, cost height, cost are big, generally are used for the anti-nuclear radiation of nuclear rocket engine and leak.

The inventor if can substitute thick and heavy stereotype, sheet lead with galvanized wire after further research, makes the sandwich layer of chip shielding goods, then can overcome the defective of above prior art.

Summary of the invention

The object of the invention is to propose a kind of plumbous clothing of nuclear radiation shield with certain extensibility and intensity.

The present invention includes weaving face fabric and lining material, described weaving face fabric and in make chip between the material, described chip is that the lead fiber silk and the vulcanization of rubber of 0. 1mm～0.3mm forms by diameter.

The lead fiber silk that the present invention adopts can satisfy the needs of longitude and latitude knitting forming, owing to have good physical-mechanical properties (obdurability, thermal stability etc.), presses the sandwich layer that forms sheet shielding goods so can prolong by braiding, and it is few to produce waste material.Under the prerequisite that does not reduce radiation proof function, make the saving, conveniently wear of plumbous clothing or lead shield with material, durability is good, and the maintainer is subjected at the scene according to time decreased 50 ﹪.

Another object of the present invention is to propose the production method of the plumbous clothing of nuclear radiation shield.

May further comprise the steps:

1) in wooden model, all spreads the lead fiber silk that diameter is 0. 1mm～0.3mm, form the lead fiber silk sheet;

2) the lead fiber silk sheet after the taking-up typing sprays with natural rubber adhesive;

3) the lead fiber silk sheet that will spray natural rubber adhesive places in the metal die, and in 160～200 ℃ of high temperature vulcanized machines, part under 300kg sulfide stress bar acted on after 350～450 seconds, was cooled to normal temperature, takes out the chip of sulfuration;

4) chip is sewn in the textile cloth, makes plumbous clothing.

Technology of the present invention is simple, reasonable, is easy to manufacture, and can reduce leady raw materials greatly.

Embodiment

1, the making of plumbous clothing core:

Make the wooden model of plumbous clothing core earlier, in mould, all spread the lead fiber silk that diameter is 0. 1mm～0.3mm, above mould, be pressed into the wooden model typing, form the lead fiber silk sheet.

Take out the lead fiber silk sheet after finalizing the design, adopt the spraying of natural rubber slurries.

Lead fiber silk sheet after the spraying is placed in the metal die, and in 160～200 ℃ of high temperature vulcanized machines, part under 300kg sulfide stress bar acted on after 350～450 seconds, was cooled to normal temperature.

From matched moulds, take out the chip of sulfuration.

2, ready-made clothes production:

Chip is sewn in the textile cloth, makes plumbous clothing.

3, effect comparison table:

Claims (2)

1. the plumbous clothing of nuclear radiation shield comprises weaving face fabric and lining material, described weaving face fabric and in make chip between the material, described chip is that 0. 1mm～0.3mm lead fiber silk and caoutchouc vulcanization form by diameter.

2. production method of the plumbous clothing of nuclear radiation shield according to claim 1 is characterized in that may further comprise the steps:

1) in wooden model, all spreads the lead fiber silk that diameter is 0. 1mm～0.3mm, form the lead fiber silk sheet;

2) the lead fiber silk sheet after the taking-up typing sprays with natural rubber adhesive;

3) the lead fiber silk sheet that will spray natural rubber adhesive places in the metal die, and in 160～200 ℃ of high temperature vulcanized machines, part under 300kg sulfide stress bar acted on after 350～450 seconds, was cooled to normal temperature, takes out the chip of sulfuration;

4) chip is sewn in the textile cloth, makes plumbous clothing.