The front flexing-arm roller blind is a kind of shutter that is commonly used and has two supporting rods. Recently, the reporter discovered during an interview in the area of ​​Tianliu Township and Daotian Township in Shouguang City that a lot of shutters had bent support rods. Why bend? Master Wang of Zhangjiao Village, Tianliu Township, Shouguang City, said that the straw curtain will give a downward force to the extending support rod during the roll-up process. As the grass screen rolls up, the downward force becomes more and more. Large, over time, the support bar is slowly bent, and even severely breaks the bolts connecting the support bar with the shutter head and cause an accident. In order to prevent the support bar from bending, many vegetable farmers welded a secondary bar on the support bar. Master Wang said that the addition of the auxiliary rods significantly increases the compressive strength of the support rods. Of course, adding this secondary bar is tricky: First, the secondary bar is preferably at an angle to the support bar, and one end is welded to the flange of the connecting head, near the edge of the flange, with angle iron or large The iron ring cut by the steel pipe connects the auxiliary bar to the support bar and decreases in order from the bottom to the top; secondly, the length of the auxiliary bar must be greater than 2/3 of the reach of the support bar, which cannot be too short, otherwise it will not achieve good results. . Master Wang said that the secondary rod should be installed early. If the support rod is bent and then welded on the secondary rod, there will be no effect. If it is slightly curved, the auxiliary rod can be welded on the upper part of the support rod in the same way as above. Master Wang reminded us that the quality of the support rod of the front flexion-extending-type roller blind machine must be better, and it can reach a certain hardness to bear enough weight. Now that the greenhouses are getting bigger and bigger, many shutters are overloaded. If the front support bars of the shutters bend in a short period of time, it means that the weight of the greenhouse straws is much greater than that of the support rods. This requires an increase in the compressive strength of the struts, or the installation of two roller blinds, otherwise dangerous. In addition, the bolts connecting the support rod and the shutter head should be inspected from time to time to avoid accidents caused by bolt looseness or breakage. Finished products of varicella vaccine. It has three qualities,good safety of gelatin-free, long validity period by good stability, better protection with high titer and immune efficacy. These improvements enhanced the vaccine safety and quality, and established BCHT the leading position in varicella vaccine. We have two different packages, penicillin bottle and pre-filled syringe. And it has been exported to other countries, such as India, Philippines. Varicella Vaccine Finished Products Finished Products Of Rabies Vaccine,Rabies Vaccine For Human Use,Live Biotechnology Chicken Pox,Live Lyophilized Vaccination Changchun BCHT Biotechnology Co.,Ltd , https://www.ccbcht.net
