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| 首頁 關(guān)于遠(yuǎn)東 產(chǎn)品目錄 銷售網(wǎng)絡(luò) 生產(chǎn)設(shè)備 技術(shù)支持 公司資質(zhì) 聯(lián)系我們
中文名 瀝青Chinese name asphalt CAS登錄號8052-42-4The CAS login number 8052-42-4 EINECS登錄號232-490-9EINECS registration number 232-490-9 熔 點 485Melting point 485 沸 點 <470℃Boiling point < 470 ℃ 水溶性不溶于水Water soluble does not dissolve in water 密 度 1.15-1.25Dense degree of 1.15 to 1.25 外 觀半固體或液體狀態(tài)Outside view half solid or liquid state 閃 點204.4Flash point 204.4 危險性描述健康危害：中等毒性Describe health hazard risk: medium toxicity 來 源煤和石油To the source of coal and oil 成 分瀝青質(zhì)和樹脂Into asphaltene and resin 含 量99.48%Containing 99.48% 爆炸下限 30(g/立方厘米)The lower explosive limit (30 g/cm3) 導(dǎo)電性能絕緣體(常溫下)Conductivity insulator (room temperature) 瀝青屬于憎水性材料，它不透水，也幾乎不溶于水、丙酮、乙醚、稀乙醇，溶于二硫化碳、四氯化碳、氫氧化鈉。瀝青及其煙氣對皮膚粘膜具有刺激性，有光毒作用和致癌作用。我國三種主要瀝青的毒性：煤焦瀝青>頁巖瀝青>石油瀝青，前二者有致癌性。瀝青的主要皮膚損害有：光毒性皮炎，皮損限于面、頸部等暴露部分；黑變病，皮損常對稱分布于暴露部位，呈片狀，呈褐－深褐－褐黑色；職業(yè)性痤瘡；疣狀贅生物及事故引起的熱燒傷。此外，尚有頭昏、頭脹，頭痛、胸悶、乏力、惡心、食欲不振等全身癥狀和眼 、鼻、咽部的刺激癥狀。Asphalt is hydrophobic material, it impermeable, almost insoluble in water, dilute ethanol, acetone, ether, soluble in carbon disulfide, carbon tetrachloride, sodium hydroxide.Asphalt and flue gas of skin mucous membrane irritation, has the light effect and the effect that cause cancer.China's three major asphalt toxicity: coal tar > > oil shale asphalt asphalt, before both have carcinogenicity.The main skin lesions are: asphalt light contact dermatitis, skin confined to the face, neck and other exposed parts;Melanosis, skin lesions often symmetrical distributed in the exposed parts, plate shaped, brown - deep brown - brown-black;Occupational acne;Verrucous vegetations and the accident cause thermal burns.In addition, there are dizziness, head bilges, headache, chest tightness, fatigue, nausea, loss of appetite and other systemic symptom and eye, nose, pharynx and irritation. 煤焦瀝青Coal tar: 煤焦瀝青是煉焦的副產(chǎn)品，即焦油蒸餾后殘留在蒸餾釜內(nèi)的黑色物質(zhì)。它與精制焦油只是物理性質(zhì)有分別，沒有明顯的界限，一般的劃分方法是規(guī)定軟化點在26．7℃（立方塊法）以下的為焦油，26．7℃以上的為瀝青。煤焦瀝青中主要含有難揮發(fā)的蒽、菲、芘等。這些物質(zhì)具有毒性，由于這些成分的含量不同，煤焦瀝青的性質(zhì)也因而不同。溫度的變化對煤焦瀝青的影響很大，冬季容易脆裂，夏季容易軟化。加熱時有特殊氣味；加熱到260℃在5小時以后，其所含的蒽、菲、芘等成分就會揮發(fā)出來。Coal
tar is a by-product of coking, namely tar distillation residue in distillation
kettle black material.It has respectively with refined tar is only physical
properties, there is no clear boundaries, is the way of dividing rules softening
point in commonly 26.7 ℃ (cube method) for tar, under 26.7 ℃ above for asphalt.Coal
tar mainly contains difficult volatilization of anthracene, phenanthrene, pyrene,
etc.These substances have toxic, because the content of these compounds is
different, the properties of coal tar are so different.The change of temperature
has much effect on the coal tar, winter easy embrittlement, summer is easy
to soften.Heating from time to tome special smell;Heated to 260 ℃ after 5 hours,
its composition such as anthracene, phenanthrene, pyrene will evaporate. ●高粘度齒輪泵并不能產(chǎn)生壓力，它只是輸出流量。壓力低或無壓力，說明高粘度齒 輪泵沒有吸入液體或泄漏嚴(yán)重。 High viscosity gear pump does not generate pressure, it is only the output flow.Pressure is low or no pressure, high viscosity gear wheel pump don't inhale the liquid or leakage is serious. 電動機輸出功率偏小、齒 輪泵排量選得過大或壓力調(diào)得過高時，也會造成壓力不足 當(dāng)然，壓力表損壞或壓力表節(jié)流孔堵塞時也顯示不出壓力，此時可換裝一個新的壓力表檢查。 Small motor output power, gear wheel pump capacity to choose too large or pressure too high, can cause stress Pressure gauge damage or pressure gauge orifice jams, of course, also could not show pressure, can change a new pressure gauge to check at this time. 如果確認(rèn)泵無流量輸出，可能是由于泵安裝有誤、泵的轉(zhuǎn)向不對，或吸人側(cè) ( 進液口及吸液管道 ) 堵塞、出口止回閥裝反或卡死了，也有可能是驅(qū)動軸斷裂了。 If confirmed that no flow pump output, could be turned to the pumps due to pump installation is wrong, wrong, or suction side (liquid into the mouth and suck liquid pipeline jam, export check valve installed backwards, or card is dead, it is possible that the drive shaft fracture. 高粘度泵在轉(zhuǎn)速過低時會引起出液量不足，這種現(xiàn)象往往是由于泵的驅(qū)動裝置打滑或功率不足所致。此時應(yīng)檢查齒 輪泵的實際轉(zhuǎn)速、泵與電動機的聯(lián)接及功率匹配情況等。
High viscosity pump in low speed can cause insufficient quantity of produced
liquid, this phenomenon is often due to the slippage of the pump drive or insufficient
power.Check the gear wheel pump at this time of the actual speed, pump and
motor connection and power matching, etc. 高粘度齒輪泵的吸油管道內(nèi)徑應(yīng)足夠大，并避免狹窄通道或急劇拐彎、減少彎頭，去除不必要的閥門、附件，盡可能地降低泵的安裝高度，縮短吸油管道的長度，以減少壓力損失。管接頭等元件的密封要良好，以防止空氣侵入，從而控制氣穴與氣蝕的發(fā)生。止回閥與安全閥在齒輪泵的輸出管路上最好安裝一個止回閥。這樣在檢修泵及輸出管道時，系統(tǒng)中的液體不會發(fā)生倒流。齒輪泵帶負(fù)荷停車時，亦可防止泵倒轉(zhuǎn)而在其輸出管道內(nèi)產(chǎn)生局部真空。應(yīng)當(dāng)注意，出口止回閥不能裝反或出現(xiàn)卡死現(xiàn)象。高粘度泵的出口管路上還應(yīng)當(dāng)設(shè)置安全閥等保護裝置，這樣一旦泵的出口通道發(fā)生堵塞，就可以打開安全閥卸壓。安全閥可以與泵體或泵蓋鑄成一體，也可以單獨裝配。對于需要正反轉(zhuǎn)的高粘度齒輪泵，其進出口管路上均需設(shè)置安全閥。
High viscosity gear pump oil suction pipe diameter should be large enough,
and to avoid the narrow channel, or a sharp turn, reducing elbow, remove unnecessary
valves, fittings, as much as possible to reduce the installation height of
pump, shorten the length of the oil suction pipe, in order to reduce the pressure
loss.Components, such as pipe joint sealed well, in order to prevent the air
intrusion, thus control air-pocket and the occurrence of cavitation.Check valve
and relief valve on the output of the gear pump tube had better install a check
valve.In the overhaul pump and output pipe, the system of fluid backflow will
not occur.Gear pump to stop loading machine, can be in the output pipe to prevent
pump reverse, and create a partial vacuum.It should be noted that the outlet
check valve cannot be installed backwards or stuck.High viscosity of the pump
outlet pipe also shall set up relief valve or other protective device on the
road, so that once the clogging pump export channels, can open the relief valve
pressure relief.The relief valve can be cast and pump body and pump cover,
also can separate assembly.For high viscosity gear pump need positive &negative,
import and export all needs to set up the line safety valve.
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瀝青混合料占用泵用NYP-110-RU-T2-W51高粘度泵配YCJ112-15KW-305減速機
