大型拉挤玻璃钢电缆桥架的研制

本文以 480× 360× 6大型拉挤玻璃钢电缆桥架为例 ,针对拉挤成型大尺寸的玻璃钢电缆桥架的外形设计 ,结构、性能设计 ,以及生产设备、模具、工艺、产品性能等技术问题进行探讨     

简讯

玻璃钢电缆桥架拉挤工艺问世随着我国玻璃钢制品的广泛应用,大量应用于化工等工业电器的电缆桥架拉挤工艺技术由外国垄断的局面终于被打破。最近河北冀州市华瑞玻璃钢有限责任公司自主创新建起4条玻璃钢电缆桥架拉挤生产线,产品获得国内用户认可。这是该公司经过多年的技术攻关     

玻璃钢电缆桥架拉挤工艺问世

随着我国玻璃钢制品的广泛应用，大量应用于化工等工业电器的电缆桥架拉挤工艺技术由外国垄断的局面终于被打破。最近河北冀州市华瑞玻璃钢有限责任公司自主创新建起4条玻璃钢电缆桥架拉挤生产线，产品获得国内用户认可。这是该公司经过多年的技术攻关研究成功的。其产品具有力学性能好及优良的绝缘性能，特别是具有良好的物理性能，能满足不同环境下的使用要求。     

CB-B25×25玻璃钢齿轮油泵

浙江省平阳县城关玻璃钢厂在1977年试制成功CB-B25×25玻璃钢齿轮油泵。该泵的壳体、端盖等采用酚醛模塑料模压成型,齿轮用热塑性玻璃钢——聚碳酸酯玻璃钢——挤压成型。 CB-B25×25玻璃钢齿轮油泵的设计要求是: 流量 25公升/分     

玻璃钢水上滑梯

1987年,武汉市群胜造船厂在汉建成了高×长×宽=18×56×8m的六色彩五滑道整体式玻璃钢滑梯。经过三年来的使用观察和在国内考察类似设施的结果,该厂又于1990年8月5日在武汉市国际游乐场(中意合资全套意大利游艺设施)水上乐园内建成了该场唯一国产的游艺设施——总长×截面宽×截面高=242×0.9×0.85m的三色六滑道分体式玻璃钢水上娱乐滑梯。     

浙江省玉环县净水设备厂产品

玻璃钢蜂窝斜、直管斜管:适用于给水净化和污水处理加速沉淀、隔油和除砂等方面。块体尺寸:长1000×宽500×高866(mm),倾角60°。直管:适合塔式生物滤池、接触氧化池及冷却塔中的优质填料。块体尺寸:长1000×宽500×高920(mm)、长800×宽800×高200(mm)等。斜(直)管块体尺寸可根据用户需要生产特殊规格。本产品发挥了玻璃钢及蜂窝的优点,经广州、北京等大中自来水公司及全国各地十     

京华派克聚氨酯树脂拉挤技术交流及现场演示培训活动在京举办

正2016年5月19日,由北京京华派克聚合机械设备有限公司主办的"聚氨酯树脂拉挤技术交流/培训中心"聚氨酯树脂拉挤槽式桥架现场演示培训活动在北京顺利举行。来自聚氨酯树脂、复合材料、玻璃钢制品、电缆桥架生产厂家,国内外树脂供应商,国内外玻纤供应商,以及行业协会领导等近百位专家、同仁参加了此次会议。在会议期间,来     

玻璃钢缓弯弯头模具的设计和制作

本文详细叙述了φ２００×９０°玻璃钢弯头模具的设计和制作方法。     

广塑—300型逆流式玻璃钢冷却塔简介

一、塔体结构该塔塔体与盛水盘采用不饱和聚酯玻璃钢制成。塔体直径φ5230mm 塔高4420mm 塔自重2.8吨,运转重量7.5吨填料:采用35×25×60°聚丙烯斜交错     

整体玻璃钢洗涤塔在沪试制成功

根据玻璃钢耐腐蚀的优越性,特别是它具备耐酸性的优点,完全适于制作洗涤塔。最近上海地区试制若干个容积为11m~3的玻璃钢洗涤塔,尺寸D×H是1200×10475,内衬层δ=3毫米,外层δ=10毫米,采用耐蚀耐温性好的乙烯基聚酯树脂制造。产品按“玻璃钢贮罐标准”,HG 21504-2-12制造,其制品的垂直度不大于千分之一,在盐酸(<35％)介质     

大型风力机玻璃钢叶片设计

本文就大型风力机玻璃钢叶片设计中若干问题进行讨论,包括气动设计、叶片剖面和根端设计、荷荷工况、强度和疲劳分析、空腹叶片工分析、叶片动态特性评价。     

The use of photoelastic foils for stress and strain investigation of concrete beams

In order to explain higher bending and tensile strength and extensibility of concrete reinforced by a GRP surface coating detailed measurements were made of surface strains of these composite beams and analogous comparative beams without surface coating by means of thin birefringent photoelastic surface foils. With regard to very small deformations of concrete in tension the sensibility of foils had to be high. The production and application of large size foils were connected with a number of technical problems which were solved successfully. The results of tests performed made it possible to describe the process of development of structural cracks in concrete and to explain the mechanism of cooperation of concrete with the more ductile GRP coating.     

Clinicopathologic and Prognostic Association of GRP94 Expression in Colorectal Cancer with Synchronous and Metachronous Metastases

Patients with advanced colorectal cancer (CRC) with distant metastases have a poor prognosis. We evaluated the clinicopathological relevance of GRP94 expression in these cases. The immunohistochemical expression of GRP94 was studied in 189 CRC patients with synchronous (SM; n = 123) and metachronous metastases (MM; n = 66), using tissue microarray; the association between GRP94 expression, outcome, and tumor-infiltrating lymphocytes (TILs) was also evaluated. GRP94 was expressed in 64.6% (122/189) patients with CRC; GRP94 positivity was found in 67.5% and 59.1% patients with SM and MM, respectively. In the SM group, high GRP94 expression was more common in patients with a higher density of CD4+ TILs (p = 0.002), unlike in the MM group. Survival analysis showed that patients with GRP94 positivity had significantly favorable survival (p = 0.030); after multivariate analysis, GRP94 only served as an independent prognostic factor (p = 0.034; hazard ratio, 0.581; 95% confidence interval, 0.351–0.961) in the SM group. GRP94 expression was detected in 49.4% of metastatic sites and showed significant heterogeneity between primary and metastatic lesions (p = 0.012). GRP94 is widely expressed in CRC with distant metastases; its expression was associated with favorable prognosis in the SM group, unlike in the MM group.     

矿压监测系统在综采工作面初采初放的应用

结合综采工作面支架工作阻力监测及以往的经验,总结和验证了初采初放期间的矿压显现规律,在直接顶和基本顶的大面积垮落之前,确保工作面支架工况,保证端头及超前的支护质量,确保安全生产。     

The effect of crystallographic orientation and solution aging on the electrical properties of sol–gel derived Pb(Zr0.45Ti0.55)O3 thin films

Lead zirconate titanate—Pb(Zr_0.45Ti_0.55)O₃ thin films are grown on Pt_1 1 1/Ti/SiO₂/Si_1 0 0 substrates by a sol–gel method with 1 0 0/0 0 1 and 1 1 1 preferred orientations. Film orientation was controlled mainly by the annealing process and temperature. Films with 1 0 0/0 0 1 orientation consist of a uniform microstructure with micron size grains, whereas films with 1 1 1 orientation contain sub-micron grains. The electrical properties were influenced markedly by the microstructure and orientation of the films. The 1 1 1 oriented films exhibit a square-like hysteresis loop with remnant polarization (P_r) reaching 46 μC/cm² under 550 kV/cm, whereas 1 0 0/0 0 1 oriented films have a P_r of 20 μC/cm² with more slim hysteresis curves. Aging of the precursor solutions resulted in films growing with 1 0 0/0 0 1 texture and displaying inferior electrical properties.     

玻璃钢法兰的结构设计及成型工艺

根据玻璃纤维增强塑料的性能特点，结合实际经验，探讨了玻璃纤维增强塑料法兰的结构及成型工艺。结果表明，此种法兰的结构设计及其成型方法可行，已获得应用。     

复合材料光伏支架结构设计及应用研究

为开发一种结构性能稳定、耐久性和轻量化的光伏支架,以某试点建设工程为背景,制备出树脂基复合材料光伏支架。从光伏支架承受的风荷载﹑雪荷载﹑自重荷载及地震荷载入手,通过计算,对支架结构设计中的关键构件﹑节点进行强度校核。同时,通过支架系统风洞力学性能测试及支架用复合材料4000 h多因子老化特性研究,验证了复合材料光伏支架实际应用的可行性。     

High-Molecular-Weight Hyaluronic Acid Inhibits IL-1β-Induced Synovial Inflammation and Macrophage Polarization through the GRP78-NF-κB Signaling Pathway

Recent evidence has suggested that synovial inflammation and macrophage polarization were involved in the pathogenesis of osteoarthritis (OA). Additionally, high-molecular-weight hyaluronic acid (HMW-HA) was often used clinically to treat OA. GRP78, an endoplasmic reticulum (ER) stress chaperone, was suggested to contribute to the hyperplasia of synovial cells in OA. However, it was still unclear whether HMW-HA affected macrophage polarization through GRP78. Therefore, we aimed to identify the effect of HMW-HA in primary synovial cells and macrophage polarization and to investigate the role of GRP78 signaling. We used IL-1β to treat primary synoviocytes to mimic OA, and then treated them with HMW-HA. We also collected conditioned medium (CM) to culture THP-1 macrophages and examine the changes in the phenotype. IL-1β increased the expression of GRP78, NF-κB (p65 phosphorylation), IL-6, and PGE2 in primary synoviocytes, accompanied by an increased macrophage M1/M2 polarization. GRP78 knockdown significantly reversed the expression of IL-1β-induced GRP78-related downstream molecules and macrophage polarization. HMW-HA with GRP78 knockdown had additive effects in an IL-1β culture. Finally, the synovial fluid from OA patients revealed significantly decreased IL-6 and PGE2 levels after the HMW-HA treatment. Our study elucidated a new form of signal transduction for HMW-HA-mediated protection against synovial inflammation and macrophage polarization and highlighted the involvement of the GRP78-NF-κB signaling pathway.     

Upregulation of Phosphorylated HSP27, PRDX2, GRP75, GRP78 and GRP94 in Acquired Middle Ear Cholesteatoma Growth

Cholesteatoma is a destructive and expanding growth of keratinizing squamous epithelium in the middle ear or petrous apex. The molecular and cellular processes of the pathogenesis of acquired middle ear cholesteatoma have not been fully understood. In this study, comparative proteomic analysis was conducted to investigate the roles of specific proteins in the pathways regarding keratinocyte proliferation in cholesteatoma. The differential proteins were detected by comparing the two-dimension electrophoresis (2-DE) maps of the epithelial tissues of 12 attic cholesteatomas with those of retroauricular skins. There were 14 upregulated proteins in the epithelial tissues of cholesteatoma in comparison with retroauricular skin. The modulation of five crucial proteins, HSP27, PRDX2, GRP75, GRP78 and GRP94, was further determined by RT-PCR, Western blot and immunohistochemistry. Phosphorylation of HSP27 at Ser-82 was identified by mass spectroscopy. The results of this study suggested that phosphorylated HSP27 is the end expression of two potential signal-transduction pathways, and together with PRDX2, they are very likely involved in the proliferation of keratinocytes in cholesteatoma. Upregulations of GRP75, GRP78 and GRP94 in keratinocytes may be able to counter endoplasmic reticulum stress, to inhibit cell apoptosis, to prevent protein unfolding and to promote cholesteatoma growth.     

玻璃钢渔船产业化的发展与推广

本文对国内外玻璃钢渔船的发展进行了分析,并探讨了我国玻璃钢渔船的发展与推广措施。