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瀝青是(shì)由不同分子(zǐ)量的碳(tàn)氫化(huà)合物及其(qí)非(fēi)金(jīn)屬衍生物(wù)組成(chéng)的黑褐色(sè)複雜混合(hé)物，呈(chéng)液态，是一種防(fáng)水防(fáng)潮(cháo)和防腐(fǔ)的有機(jī)膠(jiāo)凝材料。用于塗料、塑(sù)料、橡(xiàng)膠等(děng)工業(yè)以及鋪(pù)築路面(miàn)等。 asphalt is composed of different molecular weight hydrocarbons and non-metallic derivatives of dark brown complex mixture, a liquid, is a kind of waterproof and moistureproof and anticorrosive organic cementing materials.used in coatings, plastic, rubber and other industrial and paved road, etc. 中文名 瀝青(qīng)chinese name asphalt cas登錄(lù)号8052-42-4the cas login number 8052-42-4 einecs登錄号(hào)232-490-9einecs registration number 232-490-9 熔 點 485melting point 485 沸 點(diǎn)<470 ℃boiling point < 470 ℃< iv> 水溶性不(bú)溶于(yú)水water soluble does not dissolve in water 密(mì) 度 1.15-1.25dense degree of 1.15 to 1.25 外 觀半(bàn)固體或液體(tǐ)狀态outside view half solid or liquid state 閃(shǎn) 點204.4flash point 204.4 危(wēi)險性描述(shù)健康危(wēi)害：中等(děng)毒性describe health hazard risk: medium toxicity 來 源(yuán)煤和(hé)石油(yóu)to the source of coal and oil 成(chéng) 分瀝青(qīng)質和樹(shù)脂into asphaltene and resin 含 量99.48%containing 99.48% 爆炸下限 30(g/立方(fāng)厘米)the lower explosive limit (30 g/cm3) 導(dǎo)電性能絕緣體(tǐ)(常溫下(xià))conductivity insulator (room temperature) 瀝青(qīng)屬于憎水(shuǐ)性材(cái)料(liào)，它(tā)不透(tòu)水，也幾乎不溶(róng)于水、丙酮、乙醚(mí)、稀乙醇，溶于二(èr)硫化(huà)碳(tàn)、四氯化(huà)碳、氫氧(yǎng)化(huà)鈉。瀝(lì)青及其煙氣對(duì)皮膚(fū)粘膜具有刺激性，有光毒(dú)作用和緻(zhì)癌作(zuò)用。我國三種主要瀝青(qīng)的毒性(xìng)：煤焦瀝青>頁(yè)岩(yán)瀝青>石油(yóu)瀝青(qīng)，前二者有緻癌性。瀝青的主要皮膚損害有：光(guāng)毒性皮炎，皮損(sǔn)限于(yú)面、頸部等(děng)暴露部分；黑變(biàn)病，皮(pí)損常對稱(chēng)分布于暴(bào)露部(bù)位，呈(chéng)片狀，呈褐－深褐－褐黑(hēi)色；職(zhí)業性痤(cuó)瘡；疣狀贅生物(wù)及事故引(yǐn)起的熱燒傷(shāng)。此外，尚有頭昏、頭脹(zhàng)，頭痛、胸悶、乏力(lì)、惡(è)心、食欲(yù)不振(zhèn)等全身症(zhèng)狀和眼 、鼻(bí)、咽部(bù)的刺激症狀。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(méi)焦瀝青是煉焦(jiāo)的副(fù)産品(pǐn)，即焦(jiāo)油蒸餾後殘(cán)留在蒸(zhēng)餾釜内的黑色(sè)物質(zhì)。它(tā)與精制(zhì)焦油隻是(shì)物理(lǐ)性質有分别，沒(méi)有明顯的界限(xiàn)，一般的(de)劃(huà)分(fèn)方法是規定(dìng)軟化(huà)點在26．7℃（立方塊法(fǎ)）以下的為焦油(yóu)，26．7℃以上的為(wéi)瀝青(qīng)。煤焦瀝青中主(zhǔ)要含(hán)有(yǒu)難揮發的蒽、菲(fēi)、芘等。這(zhè)些物質具有毒(dú)性，由(yóu)于這(zhè)些成(chéng)分的(de)含量不同(tóng)，煤焦瀝青的性質也因而不同(tóng)。溫度(dù)的變化對煤焦(jiāo)瀝青的影(yǐng)響很大(dà)，冬(dōng)季容易脆裂，夏季容(róng)易軟化。加(jiā)熱時有特(tè)殊(shū)氣味；加(jiā)熱到260℃在5小(xiǎo)時以(yǐ)後，其所含(hán)的蒽、菲、芘等成分就(jiù)會揮(huī)發出來。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. 石(shí)油瀝青(qīng)asphalt 石油瀝(lì)青是(shì)原油蒸餾(liú)後的(de)殘(cán)渣(zhā)。根據(jù)提煉程度(dù)的不(bú)同，在常溫下成(chéng)液體、半固(gù)體或固體。石油(yóu)瀝青(qīng)色黑(hēi)而有光澤(zé)，具有較(jiào)高(gāo)的感(gǎn)溫性。由于它在(zài)生産過程(chéng)中曾(céng)經蒸(zhēng)餾至400℃以上(shàng)，因而所(suǒ)含(hán)揮發成分甚少(shǎo)，但仍(réng)可能有(yǒu)高分子的碳氫化合物(wù)未(wèi)經揮發出來，這些物質或多或少對人(rén)體健(jiàn)康是有(yǒu)害的。petroleum asphalt is after crude distillation residue.depending on the degree of refining, into a liquid, semi-solid or solid at room temperature.petroleum pitch dark and luster, has higher heat resistance.because it had distillation in the production process to more than 400 ℃, thus contained little volatile component, but may still have high polymer without volatile hydrocarbons, which more or less is harmful to human health. 天(tiān)然瀝青(qīng)natural asphalt 天然瀝(lì)青儲藏在地下(xià)，有的(de)形成(chéng)礦層(céng)或在地殼(ké)表面堆積。這種(zhǒng)瀝青(qīng)大都經過天然(rán)蒸發(fā)、氧化，一般(bān)已不含有任何(hé)毒素。natural asphalt storage in underground, some forming seam or piled up in the earth's crust surface.the asphalt mostly through the natural evaporation and oxidation, generally do not contain any poison. 瀝青材料分為地瀝青和(hé)焦油瀝青兩大(dà)類。地(dì)瀝青又分(fèn)為天然(rán)瀝(lì)青和石油瀝青(qīng)，天然瀝青(qīng)是石(shí)油滲出地表經長期(qī)暴露(lù)和蒸(zhēng)發後(hòu)的殘(cán)留物；石油(yóu)瀝青是将精制(zhì)加工(gōng)石油所殘(cán)餘的(de)渣油，經适(shì)當的工藝(yì)處理(lǐ)後得到的(de)産(chǎn)品(pǐn)。焦油瀝青(qīng)是煤、木材等(děng)有機物(wù)幹餾加(jiā)工所得(dé)的焦油經(jīng)再加(jiā)工後(hòu)的産品(pǐn)。工程中采用(yòng)的瀝青絕(jué)大(dà)多(duō)數是(shì)石油(yóu)瀝(lì)青(qīng)，石油(yóu)瀝青是複雜的(de)碳氫化合物與其非金屬(shǔ)衍生(shēng)物組成的(de)混合(hé)物。通常瀝青閃點在240℃~330℃之間(jiān)，燃點(diǎn)比閃(shǎn)點約(yuē)高3℃~6℃度，因此施(shī)工(gōng)溫度應控制(zhì)在閃點(diǎn)以下(xià)。asphalt material divided into two categories, pitch and bitumen.asphalt is divided into natural asphalt and petroleum asphalt, natural bitumen is oil seepage surface after long exposure and evaporation residue;petroleum asphalt is a residual of residual oil will be refined processing, after appropriate processing products.bitumen is coal, wood and other organic matter carbonization processing tar after reprocessing of products.engineering used in the asphalt is the vast majority of asphalt, asphalt is a complex mixture of hydrocarbons with nonmetal derivatives.usually asphalt flash point between 240 ℃ ~ 330 ℃, flash point is higher than flash point about 3 ℃ ~ 6 ℃ degrees, so the construction temperature should be controlled below the flash point.v 輸送改性(xìng)瀝青(qīng)泵在(zài)開始(shǐ)運轉(zhuǎn)前，往(wǎng)齒輪(lún)泵的殼體内灌(guàn)滿待(dài)輸(shū)送(sòng)的液體，便(biàn)于安全啟(qǐ)動。若(ruò)環境溫度(dù)低于冰點(diǎn)，應預(yù)先向泵内(nèi)通入(rù)熱蒸汽，進行預(yù)熱處(chù)理，然後才(cái)可啟動齒輪泵(bèng)。高粘度泵(bèng)的旋轉方(fāng)向要與進(jìn)、出油(yóu)口相(xiàng)符。齒輪泵(bèng)若(ruò)是第一(yī)次運行，或(huò)長期(qī)閑置後再使用(yòng)，最好在空載或(huò)小負荷(hé)情況下先跑合一小時(shí)左右(yòu)。如果(guǒ)在跑(pǎo)合階段預先覺(jiào)察出異常(cháng)溫升(shēng)、洩漏、振動和噪(zào)聲時，應停機檢(jiǎn)查。高(gāo)粘(zhān)度(dù)齒輪泵的(de)支座或法(fǎ)蘭與其驅動電(diàn)機應采(cǎi)用共同(tóng)的安裝基礎，基(jī)礎、法(fǎ)蘭(lán)或支座(zuò)均需具有足夠的剛度，以減小齒輪泵運(yùn)轉時(shí)産生(shēng)的振(zhèn)動和(hé)噪聲(shēng)。電動(dòng)機與(yǔ)齒輪(lún)泵須用彈(dàn)性聯軸(zhóu)器連接(jiē)，同軸度小(xiǎo)于0.1毫米，傾斜角(jiǎo)不得(dé)大(dà)于1度。安裝聯(lián)軸器時不得用(yòng)錘敲打，以(yǐ)免傷(shāng)害齒(chǐ)輪泵的齒輪等(děng)零件。若用(yòng)帶輪、鍊輪等驅(qū)動時應設托(tuō)架支承(chéng)，以(yǐ)防(fáng)主動(dòng)齒輪軸承受徑(jìng)向力(lì)。緊固齒輪泵、電動機(jī)的地(dì)腳螺釘時，螺釘受力應均勻，連(lián)接可靠。用手轉(zhuǎn)動聯(lián)軸器時，應(yīng)感覺到齒輪泵(bèng)能夠輕松地轉(zhuǎn)動，沒有卡緊等(děng)異常(cháng)現象(xiàng)出現(xiàn)，然後才可(kě)以配(pèi)管。high viscosity pump before starting work, to gear pump casing filled with liquid, facilitate safe launch.if the environment temperature is below freezing, should advance to pump into the hot steam, preheating treatment, and then to start the pump.the direction of rotation of the pump with high viscosity, oil outlet in accord.gear pump is the first run, or long-term idle before using, had better under the condition of no load or small load to run one hour or so.if in the running-in stage in advance detect abnormal temperature rise, leakage, vibration and noise, should stop check.high viscosity gear pump bearing or flange should adopt a common drive motor installationfoundation, foundation, flange or support all needs to have enough rigidity, to reduce the vibration of gear pump is running and noise.motor and gear pump with elastic shaft coupling, coaxial degree is less than 0.1 mm, angle shall not be greater than 1 degree.when installing coupling hammer shall not be used, in order to avoid damage of the gear pump gearand other parts.if use the belt wheel, wheel, etc, shall set bracket support, in case of driving gear bearing by the radial force.ground screw fastening gear pump, motor, screw force should be uniform, reliable connection.turn the coupling with the hand, should feel can easily turn the gear pump, no abnormal phenomenon such as clamping, then can be piping. 輸送改性瀝(lì)青泵(bèng)的吸(xī)油管道内(nèi)徑應(yīng)足夠(gòu)大，并避(bì)免(miǎn)狹窄(zhǎi)通道(dào)或急劇拐(guǎi)彎、減少彎(wān)頭，去除不(bú)必要的閥門、附件，盡可能(néng)地降(jiàng)低(dī)泵的安(ān)裝高度，縮短吸油管(guǎn)道的長度(dù)，以減少壓力損(sǔn)失。管接頭等元(yuán)件的密(mì)封(fēng)要良(liáng)好，以(yǐ)防止空氣(qì)侵入，從而(ér)控制氣穴(xué)與氣(qì)蝕的(de)發生。止(zhǐ)回(huí)閥與安全閥在齒輪(lún)泵的輸出管路(lù)上最(zuì)好安裝一(yī)個止回閥。這樣(yàng)在檢修泵及輸出管(guǎn)道(dào)時，系統中的(de)液(yè)體不會(huì)發生倒(dǎo)流。齒輪(lún)泵帶負荷(hé)停車(chē)時，亦(yì)可(kě)防(fáng)止泵(bèng)倒轉(zhuǎn)而在其輸(shū)出管(guǎn)道内(nèi)産生局部真空(kōng)。應當(dāng)注意，出口止回(huí)閥不能(néng)裝(zhuāng)反或(huò)出現卡(kǎ)死現象。高粘度(dù)泵(bèng)的出(chū)口(kǒu)管路上還應(yīng)當設(shè)置安(ān)全閥等保護裝(zhuāng)置，這(zhè)樣一旦(dàn)泵的出(chū)口通(tōng)道發生堵(dǔ)塞(sāi)，就(jiù)可(kě)以打開(kāi)安全閥卸壓。安全閥(fá)可(kě)以與泵(bèng)體或(huò)泵蓋鑄成(chéng)一體(tǐ)，也可以單(dān)獨裝(zhuāng)配。對于需(xū)要正反轉的高(gāo)粘度(dù)齒輪(lún)泵，其進出(chū)口(kǒu)管(guǎn)路上均需(xū)設置安全(quán)閥(fá)。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. 輸(shū)送(sòng)改性瀝(lì)青泵是輸(shū)送高(gāo)粘度液體的齒(chǐ)輪泵，應做(zuò)到在(zài)較低的功耗、較少的洩漏(lòu)、較大(dà)的壓力下(xià)輸(shū)出(chū)最多(duō)的流(liú)量。在确定(dìng)所(suǒ)要(yào)輸送的介質時，應該(gāi)嚴格遵循(xún)産品(pǐn)說明書上的規(guī)定，盡(jìn)量(liàng)使用廠(chǎng)家推薦的流體(tǐ)介質，并注意考慮系統的工作(zuò)溫度範圍。當希(xī)望在某一較寬的溫度(dù)範圍内(nèi)使用時，輸送介質的粘度指數(shù)應該高些。輸送介質(zhì)不僅是能(néng)量傳(chuán)遞的中介，而且(qiě)也是潤滑、密封(fēng)及傳(chuán)熱介(jiè)質。液體粘度過(guò)高會增加内摩擦阻力，降(jiàng)低輸(shū)出功率，浪(làng)費能(néng)量，并(bìng)産生過高(gāo)的系(xì)統溫度(dù).高(gāo)粘度齒(chǐ)輪(lún)泵的(de)出口管(guǎn)路(lù)上應當設置安全閥(fá)等(děng)保護裝置，這樣一(yī)旦泵(bèng)的出(chū)口通道發(fā)生堵塞，就(jiù)可以打開(kāi)安全閥卸壓。對于需(xū)要正反轉(zhuǎn)的高(gāo)粘度(dù)齒輪(lún)泵，其(qí)進出口管(guǎn)路上均(jun1)需設置安全(quán)閥。high viscosity pump is conveying liquid with high viscosity gear pump, should be in lower power consumption, less leakage, under the pressure of large output the most traffic.when determining to conveying medium, we should strictly follow the provisions of the product manuals on use manufacturers recommend fluid as far as possible, and pay attention to consider the system operating temperature range.when you want to use in a wide temperature range, medium viscosity index should be higher.medium is not only the energy transfer intermediary, but also lubrication, sealing and heat transfer medium.liquid viscosity is too high will increase internal friction resistance, lower output power, waste of energy, and generate high temperature system. high viscosity gear pump outlet pipe shall set up relief valve or other protective device on the road, so once the clogging pump export channels, can open the relief valve pressure relief.for high viscosity gear pump need positive &negative, import and export all needs to set up the line safety valve. 1、工作壓(yā)力的選定1, select the work pressure 輸送(sòng)改性(xìng)瀝(lì)青(qīng)泵額定的壓力(lì)是指(zhǐ)泵連(lián)續工作時(shí)的最高許用壓(yā)力，而(ér)其工作壓(yā)力則(zé)決定于外部負載，安裝和(hé)調試的壽命與(yǔ)其工(gōng)作壓力直(zhí)接相關。對于不頻繁工作的(de)齒(chǐ)輪泵，其工(gōng)作壓力可取為泵的(de)額定壓力，考慮(lǜ)到(dào)産品質量不(bú)同，最(zuì)好(hǎo)将額定(dìng)壓力(lì)降低20%～30%使用(yòng)。對于經(jīng)常工作(zuò)于較(jiào)高壓力下(xià)的齒(chǐ)輪泵，其工作壓力應比(bǐ)泵(bèng)的額定(dìng)壓力低(dī)1～2個壓(yā)力級。石油(yóu)化工(gōng)設備常常是24小時連續運(yùn)轉，這時泵(bèng)的工(gōng)作壓(yā)力應(yīng)該取(qǔ)得比額定壓力低得(dé)多，且工作(zuò)轉速也應(yīng)該低于額定轉速。如(rú)果高粘(zhān)度齒輪(lún)泵的工作壓力(lì)調整(zhěng)過高(gāo)，則會使齒輪泵(bèng)在超(chāo)負荷下運(yùn)行。high viscosity pump rated pressure refers to the maximum allowable pump continuous work pressure, and its working pressure is determined by the external load, installation and commissioning of life is directly related with work pressure.for not frequent work gear pump, the working pressure is desirable for the rated pressure of the pump, taking the quality into consideration, it is best to used pressure rated lower 20% ~ 30%.for often work under high pressure gear pump, the working pressure shall be lower than the rated pressure of the pump 1 ~ 2 pressure level.petrochemical equipment are often 24 hours of continuous operation, and at this time of the pump working pressure should be obtained was much lower than the rated pressure, and the work speed should be lower than the rated speed.if the high viscosity gear pump high pressure adjustment, will make the pump running under overload. 2.安裝與(yǔ)試運(yùn)轉2. installation and commissioning 輸(shū)送改(gǎi)性(xìng)瀝(lì)青泵(bèng)的支座或法蘭(lán)與其(qí)驅動電機(jī)應采用共同的(de)安裝基礎，基礎、法蘭或支座均(jun1)需具有足(zú)夠的剛(gāng)度(dù)，以減小齒(chǐ)輪泵運轉(zhuǎn)時産(chǎn)生的(de)振(zhèn)動和噪聲。電動機與齒輪泵(bèng)須用彈性(xìng)聯軸器(qì)連接，同(tóng)軸度小于0.1毫米(mǐ)，傾斜角不(bú)得大于1度。安裝聯軸器時不得用錘(chuí)敲(qiāo)打(dǎ)，以免傷害(hài)齒輪泵的齒輪(lún)等零件。若用帶(dài)輪、鍊(liàn)輪(lún)等(děng)驅動時應(yīng)設托架支(zhī)承，以防主(zhǔ)動齒(chǐ)輪軸(zhóu)承受徑向力。緊固齒(chǐ)輪泵(bèng)、電動(dòng)機的(de)地腳(jiǎo)螺釘時，螺釘受(shòu)力應均勻，連接(jiē)可靠。用手轉動(dòng)聯軸器時(shí)，應感(gǎn)覺到齒輪泵能(néng)夠輕松(sōng)地轉動(dòng)，沒有(yǒu)卡(kǎ)緊等異(yì)常現象出現，然後才可以配管(guǎn)。高粘度(dù)齒輪泵(bèng)的吸油管道内(nèi)徑應足夠(gòu)大，并(bìng)避免狹窄(zhǎi)通道(dào)或急(jí)劇拐(guǎi)彎、彎(wān)頭，去除(chú)不(bú)必要的閥(fá)門、附件，盡(jìn)可能(néng)地降低泵的安(ān)裝高度，縮(suō)短吸油管(guǎn)道的(de)長度，以減(jiǎn)少壓(yā)力損(sǔn)失。管(guǎn)接頭(tóu)等元件的密封(fēng)要良好，以(yǐ)防止空氣侵入，從而(ér)控制氣(qì)穴與氣(qì)蝕的(de)發生(shēng)。在開(kāi)始運轉前，往齒(chǐ)輪泵的殼(ké)體内(nèi)灌滿待輸送的(de)液體(tǐ)，便(biàn)于安全(quán)動。若環境溫度(dù)低于冰(bīng)點，應預(yù)先向泵内通入熱蒸汽，進(jìn)行預(yù)熱處理，然(rán)後才(cái)可啟動齒輪泵(bèng)。齒輪(lún)泵的旋轉(zhuǎn)方向要與進、出(chū)油口相符(fú)。齒輪(lún)泵若是第一次運行，或長期閑(xián)置後(hòu)再(zài)使用，最(zuì)好在(zài)空載或小(xiǎo)負荷(hé)情(qíng)況(kuàng)下先(xiān)跑合一小(xiǎo)時左(zuǒ)右。如(rú)果(guǒ)在跑合(hé)階(jiē)段(duàn)預先覺出異常溫升、洩(xiè)漏(lòu)、振動和噪(zào)聲時，應機檢查。高粘(zhān)度泵的出口管(guǎn)路上(shàng)還(hái)應當設(shè)置安全閥等(děng)保(bǎo)護裝置，這(zhè)樣一(yī)旦泵的出口通(tōng)道發(fā)生(shēng)堵塞，就(jiù)可以(yǐ)打開安全(quán)閥卸(xiè)壓。對(duì)于需(xū)要正反轉(zhuǎn)的高粘度齒(chǐ)輪泵，其(qí)進出口管路上均需設置安全(quán)閥。high viscosity pump bearing or flange and its drive motor should use common installation basis, foundation, flange or support all needs to have enough rigidity, to reduce the vibration of gear pump is running and noise.motor and gear pump with elastic shaft coupling, coaxial degree is less than 0.1 mm, angle shall not be greater than 1 degree.when installing coupling hammer shall not be used, in order to avoid damage gear and other parts of the gear pump.if use the belt wheel, wheel, etc, shall set bracket support, in case of driving gear bearing by the radial force.ground screw fastening gear pump, motor, screw force should be uniform, reliable connection.turn the coupling with the hand, should feel can easily turn the gear pump, no abnormal phenomenon such as clamping, then can be piping.high viscosity gear pump oil suction pipe diameter should be large enough, and to avoid the narrow channel, or a sharp bend, bend, 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.before starting operation, to gear pump casing filled with liquid, easy to safety.if the environment temperature is below freezing, should advance to pump into the hot steam, preheating treatment, and then to start the pump.direction of rotation of the gear pump, oil outlet in accord.gear pump is the first run, or long-term idle before using, had better under the condition of no load or small load to run one hour or so.if in the running-in stage in advance the abnormal temperature rise, leakage, vibration and noise, should machine inspection.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.for high viscosity gear pump need positive &negative, import and export all needs to set up the line safety valve.
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傳真:0317-8265584 e-mail:hbydby@en76k2d.cn備案号：冀(jì)icp05010751号-3