盡所周知,瀝青是作為我國公路建設(shè)過程中較為主要的道路使用材料,。普通市政道路中瀝青的成本往往占比接近5成；盡管高速公路建設(shè)增加了征地等成本，但瀝青采購一項所占的建設(shè)成本也往往超過2成。
As we all know, asphalt is the main road material in the process of highway construction in China,. The cost of asphalt in common municipal roads is often close to 50%; although the construction of expressways increases the cost of land acquisition, the construction cost of asphalt procurement is often more than 20%.
、煤焦瀝青bai
. Coal tar pitch Bai
煤焦瀝青是煉焦的副產(chǎn)品，即焦油du蒸餾后殘留在蒸餾釜內(nèi)的zhi黑色物質(zhì)。
Coal tar pitch is a byproduct of coking, that is, the Zhi black substance remained in the distillation kettle after distillation of tar Du.
常規(guī)的煤瀝是指從煉焦過程中產(chǎn)生煤焦油中提取出來的,我們稱之為煤焦油瀝青。煤集油瀝青含有一定比例的多環(huán)芳烴,如、苯并芘等,這些多環(huán)芳烴屬于有毒物質(zhì),它們會在修筑熱拌瀝混臺料施工過程中排放易造成環(huán)境污染,危及人們健康。另外,據(jù)研究結(jié)果顯示,牒瀝青較石油瀝的低溫性能較差,容易產(chǎn)生低溫開裂等現(xiàn)象,因此煤焦油瀝膏的應(yīng)用受到限制,現(xiàn)行技術(shù)規(guī)范對煤焦油瀝青
Conventional coal tar pitch is extracted from coal tar produced in coking process, which we call coal tar pitch. Coal tar pitch contains a certain proportion of polycyclic aromatic hydrocarbons, such as, benzopyrene, etc., which are toxic substances. They will be discharged in the construction process of hot mix asphalt platform materials, which is easy to cause environmental pollution and endanger people's health. In addition, according to the research results, the low-temperature performance of diepitch is worse than that of petroleum asphalt, and it is easy to produce low-temperature cracking and other phenomena. Therefore, the application of coal tar asphalt is limited. The current technical specifications for coal tar asphalt
石油瀝青是原油蒸餾后的殘渣。
Petroleum asphalt is the residue of crude distillation.
、天然瀝青
. Natural asphalt
天然瀝青儲藏在地下，有的形成礦層或在地殼表面堆積。
Natural asphalt is stored underground, some of which form mineral deposits or accumulate on the surface of the earth's crust.
瀝青固化操作有兩種：一種是將瀝青加熱與廢物攪拌混合，一種是乳化瀝青與廢物混合，第一種方法對廢物有一定干燥度要求，目前缺乏工業(yè)污泥脫水瀝青固化一體化處理裝置，
There are two kinds of asphalt curing operations: one is to mix asphalt heating with waste mixing, the other is to mix emulsified asphalt with waste. The first method requires a certain degree of dryness for waste. At present, there is no integrated asphalt curing treatment device for industrial sludge dehydration,
防爆投入式液位變送器的技術(shù)原理，允許危險氣體進入隔爆外殼，外殼內(nèi)可能產(chǎn)生爆炸。但要求外殼必須具有足夠的強度；且各外殼結(jié)合面必須具有足夠長的嚙合長度和足夠小的間隙，以確保內(nèi)部爆炸不會穿過隔爆結(jié)合面而導(dǎo)致外部環(huán)境爆炸。防爆安全單晶硅投入式液位變送器擁有投入式液位變送器厚重的隔爆外殼，其設(shè)計承受內(nèi)部爆炸性氣體混合物的爆炸壓力超過2MPa，阻止內(nèi)部的爆炸向外部周圍爆炸性性混合物傳播，從而實現(xiàn)防爆性能。
The technical principle of explosion-proof input type liquid level transmitter allows dangerous gas to enter the explosion-proof enclosure, which may cause explosion. However, it is required that the shell must have sufficient strength; and the joint surface of each shell must have enough long engagement length and small enough clearance to ensure that the internal explosion will not pass through the flameproof joint surface and lead to the external environment explosion. The explosion-proof safety single crystal silicon input liquid level transmitter has a thick explosion-proof shell of the input liquid level transmitter, which is designed to withstand the explosion pressure of the internal explosive gas mixture more than 2MPa, to prevent the internal explosion from spreading to the external explosive mixture, so as to achieve the explosion-proof performance.
投入式液位變送器是基于所測液體靜壓與該液體高度成正比的原理，采用擴散硅或陶瓷敏感元件的壓阻效應(yīng)，將靜壓轉(zhuǎn)成電信號。經(jīng)過溫度補償和線性校正。轉(zhuǎn)換成4-20mADC標準電流信號輸出。投入式液位變送器的傳感器部分可直接投入到液體中，變送器部分可用法蘭或支架固定，安裝使用極為方便。

Based on the principle that the static pressure of the liquid measured is directly proportional to the height of the liquid, the input liquid level transmitter adopts the piezoresistive effect of diffused silicon or ceramic sensitive elements to convert the static pressure into electrical signal. After temperature compensation and linear correction. Convert to 4-20madc standard current signal output. The sensor part of the input type liquid level transmitter can be directly put into the liquid, and the transmitter part can be fixed with flange or bracket, so it is very convenient to install and use.
公司的主要產(chǎn)品有SMART斯瑪特系列壓力變送器、液位(界位變送器廠家、流量計、溫度傳感器和多參量變送器，產(chǎn)品計量資質(zhì)，防爆資質(zhì)齊全，整個生產(chǎn)系統(tǒng)通過ISO9000質(zhì)量認證體系認證。公司憑借專業(yè)技術(shù)優(yōu)勢，可靠穩(wěn)定的產(chǎn)品質(zhì)量，堅持大限度的滿足用戶的需求是企業(yè)發(fā)展的動力源泉，以優(yōu)質(zhì)專業(yè)的服務(wù)為我國電力、石油、化工、冶金、水泥、礦業(yè)、市政、造紙等行業(yè)提供了高性能價格比的工業(yè)自動變送器廠家產(chǎn)品。為我國自動變送器廠家的發(fā)展做出了重要貢獻。
The main products of the company are smart smart smart smart series pressure transmitter, liquid level (boundary transmitter manufacturer, flowmeter, temperature sensor and multi parameter transmitter. The product measurement qualification and explosion-proof qualification are complete. The whole production system has passed ISO9000 quality certification system certification. Relying on the advantages of professional technology, reliable and stable product quality, and adhering to meeting the needs of users to a large extent is the power source of enterprise development. With high-quality professional services, the company has provided high-performance and price ratio industrial automatic transmitter manufacturers' products for China's power, petroleum, chemical, metallurgical, cement, mining, municipal, paper and other industries. It has made an important contribution to the development of automatic transmitter manufacturers in China.