Qingdao Rubber Industry Design Institute Changle Rubber Machinery Experimental Factory. The Shandong Changle 262400 plug cylinder parallel pressure system replaces the traditional low pressure and large flow oil supply system to simplify the hydraulic system structure. Work efficiency is improved. It also has a large power saving effect and introduces the main pressure calculation and strength calculation method of the hydraulic system. The large and medium-sized flat vulcanizing machine is a special equipment for the vulcanization process of large rubber conveyor belts. In order to improve its performance, it has been designed for electro-hydraulic liquid thermalization. 1 fast cylinder and plunger cylinder parallel pressure high-efficiency energy-saving hydraulic system motion function overview is recommended by many schemes, large and medium-sized flat vulcanizing machine energy-efficient and simple hydraulic pressure and control system implementation 1. The lower workbench lifts the oil pump motor quickly, and starts to drive the oil pump 1. The electromagnet of the electromagnetic reversing valve is controlled. (1) The dip energized pressure oil enters the lower chamber of the fast cylinder through the one-way valve 3 reversing valve 5 The cylinder piston rod pushes the lower table to rise rapidly. Because the diameter of the cylinder is small, a higher flow rate can be obtained with a smaller flow oil pump. The table rises and drives the plunger of each plunger cylinder 1 to rise, and the plunger cylinder sucks into the cavity from the high-position tank 1 through the pilot-operated check valve 10. The oil in the cavity of the quick cylinder 1 flows back to the lower tank through the reversing valve 5. Fast, the use of rainbow in addition to improving the efficiency of the equipment to reduce production auxiliary time, but also the use of multiple plunger cylinders to eliminate the set of low-pressure large-flow oil supply system, so that the equipment is simplified and saves electricity. 1.2 Worktable vulcanization pressurization workbench rises rapidly to pressurize the rubber products to be vulcanized between the upper and lower hot plates. As the pressure rises, the pressure relay 1 operates to energize the electromagnet 30, and the position of the slide valve forms a passage, so that each plunger cylinder 1 receives high pressure oil, and the liquid control check valve 10 is automatically closed, and the columns are automatically closed. The plug cylinder 1 is the same as the quick cylinder, and pushes the work product to pressurize. That is, the fast cylinder and the plunger cylinder simultaneously obtain high-pressure oil, and the two cylinders are synchronously pressurized in parallel. 1.3 hydraulic system automatically achieve high pressure pressure maintaining function! After the rubber product to be vulcanized between the lower hot plates is compacted and reaches the required pressure, the pressure relay 2 is operated, and the electromagnet (1) is turned off, the electric pump motor is turned off, and the check valves 9 and 10 are closed. The plunger cylinder 1 in the hydraulic system and the high pressure oil of the quick cylinder are closed by the check valves 9 and 10, so that the lower stage is applied to the high pressure of the vulcanized product. If the pressure drops during the pressure holding time, the oil pump motor can be instantaneously activated by the pressure relay 2 to compensate. At this time, the hot plate heats and vulcanizes the rubber product, and the specific vulcanization time can be controlled by the adjustable time delay relay. 1.4 The lower workbench is quickly lowered. After the end of the vulcanization, the vulcanization is terminated. After the electro-magnet 201 is energized, the electromagnet 201 is energized, the reversing valve 5 is actuated, the upper chamber of the quick cylinder is connected to the pressure oil, and the pressure oil is also liquid-controlled. Opening to the valve 10, because the electromagnet 3 is still venting, the lower chamber of the quick cylinder can be drained through the pilot operated check valve 10 back to the high tank without flowing back to the lower tank 2, which is in the system two tank design institute Senior Engineer of Changle Rubber Machinery Experimental Factory. Bachelor of Engineering, mainly engaged in high-level 篦, 1 å’–å„’, playtime, drive the oil pump; pressure controller; 39, one-way wide; soft 8 pressure; 5 reversing valve; 1 plunger cylinder; fast cylinder 19942015C and fast cylinder The piston synchronously moves down quickly, so that the quick draining oil passes through the pilot operated check valve 10 to the high position tank 1. Since the plunger cylinder oil drain is driven by the fast cylinder piston to carry out pressure forced discharge, the conventional plunger cylinder is overcome by gravity. The shortcomings of oil draining save time and efficiency. 2 Calculation of the main pressure of the hydraulic system 21 Total pressure required for the operation of the vulcanizer The total pressure gauge required for the vulcanizer is 1 to overcome the pressure required for the mass of the moving parts during vulcanization and pressurization; 2 to overcome the frictional resistance generated when the moving parts move. The required pressure 3 hot plate should be applied to the total pressure plant 8 of the vulcanized product, that is, the total mass of the moving parts of the vulcanizer should include the sum of the masses of the moving parts such as the hot plate pad plunger plunger pad seat and the quick cylinder piston. That is to say, the friction of each moving part during movement is small, and the force is small to the frictional force at the liquid level limit conduit of the rear central holding and pre-tensioning system. The diameter of the number d plunger cylinder and the fast cylinder; the oil seal height of the huh2 plunger cylinder and the fast cylinder; the pressure loss value of the pipeline must also be considered when the rated working pressure of the oil pump is selected = 18 households, therefore, the rated working pressure of the selected oil pump Value, = household +0.18. 3 Calculation of the main strength of the oil pressure system 3.1 Calculation of the strength of the wall thickness of the cylinder The cylinder bulling thickness 5 can be obtained according to the material force 7 according to the formula 1 Pj column cold cylinder and fast, cylinder work. 1 card force friction factor rubber is, 5. The total pressure applied by the hot plate to the vulcanized product is Fn L hot plate work efficiency; F vulcanization pressure. 2.2 Fast cylinder working pressure The main function of the quick cylinder is to complete the free-range auxiliary movement in the soil production process faster, and push the moving parts such as the lower table and the plunger up and overcome the friction generated by the moving parts. The pressure is therefore the working pressure of the fast cylinder. The 2 is 23 plunger cylinder working pressure. The working pressure of the plunger cylinder is the vulcanization pressure, which should be noted in the calculation should be slightly larger than the pressure system from fast forward to pressurized. When the pressure control is automatically converted, the D-cylinder diameter 3.2 is the strength of the wall thickness of the tubing. The wall thickness of the pressure tubing can be calculated as follows: the stress steel pipe of the 汕管æ‘æ–™ is not more than 100 rivers, and the copper pipe is not more than 25 MPa4 The conclusion is in the electro-hydraulic liquid thermal design of large and medium-sized flat vulcanizing machines. Hydraulic system and heating system are the key to realize high-efficiency power saving of vulcanizing machine. In this study, the large and medium-sized vulcanizing machine uses a fast cylinder and a plunger cylinder in parallel to make the auxiliary air movement of the vulcanizing machine and work pressure-efficient power saving, eliminating the tradition. Reliable performance, easy maintenance, and a large power-saving effect Received date 200015 automotive sealant strips with EPDM's choice of extruded closed-cell sponges. The article first discusses the effects of the mass fraction of polymer propylene and the relative molecular mass distribution that affect the physical properties of the final vulcanized product. This paper also compares this method with the polymer selection method described by Uniroyel Chemical Company based on the principle of controlling the distribution of hunger. Tu Xuezhong translated from 200沦 anthology abstract 5 Single Bowl Kitchen Sink,Single Bowl Stainless Steel Sink,Single Bowl Sink,Single Basin Stainless Steel Sink Guangdong Huayou Hardware Products Co.,Ltd , https://www.gdhuayouhardware.com