Industrial damage detection door is an important type of lead door, which can prevent the entry of radiation. It can play a good role in radiation protection because of the following structural characteristics. The door leaf is made of aluminum alloy frame structure. The surface of the door is made of drawing stainless steel panel or high-quality aluminum alloy panel with high-voltage electrostatic spraying. The internal sandwich adopts injection type polyurethane foam technology, and the door panel is solid, flat and elegant.

門邊框包邊材料選用SUS304不銹鋼，門扇四周折邊處無應(yīng)力連接，堅固耐用。門扇四周鑲嵌封條，配以特殊設(shè)計加工的門扇運行軌道使安裝完成的門扇運行平穩(wěn)，氣密性好。采用大直徑耐磨滑輪，大大降低了運行噪音，延長使用壽命。門體雙層玻璃觀察窗，便于觀察室內(nèi)工作狀態(tài)。機箱采用特制鋁合金型材，強度高，表面陽極氧化處理使其美觀、耐磨獨特的吊具設(shè)計，氣密性調(diào)節(jié)更方便簡接。

SUS304 stainless steel is used as the binding material of door frame, and there is no stress connection around the folding edge of the door leaf, which is firm and durable. The door leaf is inlaid with high-quality seals, and the door leaf running track with special design and processing makes the installed door leaf run smoothly and has good air tightness. The use of large diameter wear-resistant pulley greatly reduces the running noise and prolongs the service life. The door body double glass observation window is convenient to observe the indoor working state. The chassis is made of special aluminum alloy profile with high strength and surface anodizing treatment, which makes it beautiful, wear-resistant, unique sling design, air tightness adjustment is more convenient and simple to connect.

同一厚度的同一種防護材料的鉛當量并不是固定不變的，有些防護材料的鉛當量是隨著使用的 X射線峰值管電壓而變化的。對含鉛的防護材料和用品，鉛當量隨使用的 X射線峰值電壓變化不大，但鉛對X射線峰值管電壓介于 40.0~88.0ke V 之間的電離輻射存在一個鉛的“弱吸收區(qū)”;而對非含鉛的防護材料和用品，鉛當量隨使用的 X射線峰值電壓變化較大，對同一種防護材料的 X射線防護服鉛當量的測試，應(yīng)在一定范圍內(nèi)不同的管電壓下測試其鉛當量值，其測試值應(yīng)不少于 5個，以更小值確定防護材料鉛當量等級。

The lead equivalent of the same protective material with the same thickness is not fixed. The lead equivalent of some protective materials varies with the applied peak X-ray tube voltage. For protective materials and articles containing lead, the lead equivalent does not change with the peak voltage of X-ray, but there is a "weak absorption zone" for ionizing radiation with X-ray peak tube voltage between 40.0 and 88.0 keV; For the protective materials and articles without lead, the lead equivalent varies greatly with the peak voltage of X-ray used. For the lead equivalent test of X-ray protective clothing of the same protective material, the lead equivalent value should be tested under different tube voltages within a certain range, and the test values should not be less than 5. The minimum value should be used to determine the lead equivalent grade of protective materials.

新版GB 16757 《X 射線防護服》標準修訂版要求防護服后片的鉛當量由原標準0.25 mmPb調(diào)整為(0.15～0.25)mmPb，因為操作人員背部所受的散射線的反射線輻射，強度比前部弱得多;另外，前部和背部距照射野的距離也不同，例如，站在受檢者旁注射造影劑的工作人員，從距離照射野10 cm 處移30 cm 處就可使其所受照射量減少十分之一。X 射線防護服并不是鉛當量越大越好，應(yīng)符合輻射防護的化原則，鉛當量(0.15～0.25)mmPb可滿足防護要求，并可減輕負重。

The revised version of GB 16757 "X-ray protective clothing" requires that the lead equivalent of the back piece of protective clothing should be adjusted from 0.25 MMPB to (0.15-0.25) MMPB, because the reflected radiation of scattering line on the back of operators is much weaker than that on the front; In addition, the distance from the front and back to the radiation field is also different. For example, for the staff who stand beside the subject and inject contrast medium, the exposure can be reduced by one tenth when the distance from the radiation field is 10 cm to 30 cm. X-ray protective clothing does not mean that the larger the lead equivalent, the better. It should conform to the optimization principle of radiation protection. The lead equivalent (0.15 ~ 0.25) MMPB can meet the protection requirements and reduce the load.

工業(yè)探傷門是在鉛門的基礎(chǔ)上進行的不斷地進行射線防護的產(chǎn)品的，對于防輻射的產(chǎn)品來說要不斷地進行提升它的防輻射的質(zhì)量，對于防輻射來說是比較關(guān)鍵的，隨著大規(guī)模的城市改造和房地產(chǎn)開發(fā)，現(xiàn)在的生活的節(jié)奏是日益加快的，各種的手機和電腦也是不斷地進行充斥著我們的生活的，輻射是一些原來建于城市周邊的傳輸發(fā)射和高壓線等設(shè)施周圍也開始進行開發(fā)建設(shè)，小區(qū)環(huán)境和室內(nèi)環(huán)境中的電磁輻射污染問題也就隨之而來，必須要進行防輻射的處理。

The industrial damage detection door is based on the lead door, which continuously carries out radiation protection products. For radiation protection products, it is necessary to continuously improve its radiation protection quality, which is more critical for radiation protection. With the large-scale urban transformation and real estate development, the pace of life is accelerating, and various mobile phones and computers are also constantly improving We are full of our life, radiation is some of the original built around the city transmission center and high-voltage lines and other facilities around the start of development and construction, residential environment and indoor environment of electromagnetic radiation pollution problems will follow, must carry out radiation prevention treatment.