33results about How to "There is no hidden danger" patented technology

The invention discloses a preparation method of an environment-friendly and cold-resistant polyvinyl chloride elastomer composition. Polyvinyl chloride resin, dialkyl terephthalate, synthetic vegetable oil ester, polar rubber, nano-active calcium carbonate, calcium-zinc Composite stabilizers, lubricants, antioxidants and pigments are mixed in a kneader, and after the temperature of the mixture reaches 90-100°C, the material is discharged and cooled, and then the cooled mixture is placed on a double-stage screw extruder to extrude and granulate The elastomer composition has a Shore hardness of less than 80 at -5°C. The beneficial effect of the present invention is that it has the advantages of excellent low-temperature toughness, high mechanical strength, good heat aging resistance, environmental protection and non-toxicity, and excellent comprehensive performance, and is especially suitable for preparing elevator balance compensation chain sheaths, door and window seals, and electric wires and cables. insulation sheath, etc.

The roll changer includes one frame, one roll connecting mechanism, one traction mechanism, and several parallel elevating mechanisms with height regulation. The roll connecting mechanism is connected through a traction rope to the traction mechanism; and the elevating mechanisms have in the top one V-shaped support block to limit the transverse motion of the roll and one roll shaft for facilitating the traction of the roll, with the roll shaft capable of rotating being set on the elevating mechanism and coaxially with the support block. The present invention has the advantages of high work efficiency, high safety and saving in manpower.

A replaceable sputtering-resistant vacuum cavity and assembly method for electric thruster ignition test, comprising: a vacuum cavity, a sputtering-resistant protection plate, channel steel, and water inlet and outlet pipes. The n sputtering-resistant protective plates are spliced ​​evenly in the circumferential direction to form an n-sided structure in cross section. The sputtering-resistant protective plates are fixedly connected to the inner wall of the vacuum chamber through channel steel, and the inner wall of the vacuum chamber is an arc surface. The end surface of the channel steel facing the vacuum cavity is processed with grooves. The cavity formed by the groove and the inner wall of the vacuum chamber is used as a cold water pipeline; the wall of the vacuum chamber is provided with a through hole, and one end of the water inlet and outlet pipe is connected to the cold water flow through the through hole on the wall of the vacuum chamber, and the water inlet and outlet pipe The other end is connected to the external cold water circulation system. The invention provides a replaceable sputtering-resistant heat sink, which has the advantages of simple structure, low manufacturing cost, low reliability risk, simple maintenance and the like.

The invention discloses titanium-modified boron-containing phenolic resin as well as a preparation method and application thereof. The titanium-modified boron-containing phenolic resin is prepared from the following raw materials in parts by weight: 65-70 parts of boron-containing phenolic resin and 0.5-2 parts of titanate. The preparation method comprises the following steps that the titanate isdropwise added into the boron-containing phenolic resin, uniform mixing is carried out, and reaction is carried out at room temperature for 2-5 hours so as to obtain the titanium-modified boron-containing phenolic resin. According to the titanium-modified boron-containing phenolic resin as well as the preparation method and application thereof, a modified boron-containing phenolic resin solution is still transparent and uniform after being placed at room temperature for three months, no boric acid and other solid substances are separated out, the quality retention rate is also obviously increased, and the modified boron-containing phenolic resin is used in a flame-retardant composite material, a functional coating, a curing agent for epoxy resin, a rubber modifier and the like, so that thethermal stability and the flame retardancy of a product can be improved; and the preparation method is simple, no catalyst is used, and the hidden danger caused by incomplete removal of the catalystcan be avoided.

The invention discloses an aluminum cell side conductive cathode structure for reducing a horizontal current of molten aluminum. The horizontal current in the molten aluminum can be greatly reduced through installing and using a horizontal or inclined conductive side cathode steel rod. A structure parameter of a cathode is determined according to an actual cell type design, the horizontal current in the molten aluminum can be remarkably reduced when the cathode is applied to the aluminum cell, the distribution of the horizontal current in the molten aluminum is optimized and the cathode voltage drop is reduced, thus the functions of weakening the vertical fluctuation of the molten aluminum and stabilizing the horizontal movement of the molten aluminum are achieved so that an electrolysis can be stably carried out at a low voltage, and the energy consumption is greatly reduced. The aluminum cell side conductive cathode structure is convenient and simple to process, easy to realize, low in cost and little in influence on service life of an inner linear of the cell.

The invention discloses a full-automatic drug sterility inspection enrichment system of a sterile bin and an operation method of the system. The enrichment system comprises a sterile operation car, an automatic operation manipulator and an operation table; the sterile operation car comprises a car base, a wastewater box, a filter containing box and a garbage box are arranged on the car base, filter hole sites are arranged over a water inlet of the wastewater box, a container frame is installed on a support frame arranged on one side of the car base and provided with container containing hole sites used for containing containers of at least one type and at least one operation hole site used for containing a container to be operated, and needle clamping devices are arranged at the corresponding operation hole sites; a clamping mechanism, a peristaltic pump, a pressure detection mechanism and a sealed cutting mechanism are installed on the operation table. Accordingly, the high-efficiency full-automatic drug sterility inspection enrichment process can be achieved in a sterile environment of the sterile bin, artificial participation is not needed, the hidden danger that the sterile environment is manually destroyed does not exist, and the system can be suitable for conducting enrichment operation on bacterium inspection of various kinds of drugs packaged in various kinds of drug bottles or bags.

The invention relates to a cleaning method of simple substance copper scales, belonging to the field of chemical cleaning of boilers in fuel electric plants. The method comprises the following steps: (1) primary copper removal; (2) primary acid cleaning; (3) secondary copper removal; (4) secondary acid cleaning; and (5) tertiary cleaning, wherein the reagent raw materials used in the steps are metered in percentage by mass. The invention thoroughly solves the problem of simple substance copper scale removal. By using the method, the scale removal rate is up to more than 99%; and the inventionensures the safety in production, and does not have hidden danger.

The invention discloses a construction method for highway reconstruction and expansion aimed at reaming bridge sections, and relates to the technical field of highway reconstruction and expansion. The construction method utilizes part of the original roadbed and pavement, and splices it with the newly-built bridges. During the reconstruction and expansion construction, the roadbed and bridges are jointly maintained, which not only saves the project investment, but also achieves the requirements of smooth and smooth expressways during the construction period. At the same time, a transition block is set between the original subgrade and the newly-built bridge, so that the transition of stiffness of the spliced ​​section is smooth. After splicing, the stiffness of the overall section changes due to the gradual change of the stiffness of the concrete transition block, and the stiffness of the subgrade and the bridge transitions smoothly. can be guaranteed. The method solves the problem of maintaining the passage of the reaming bridge section on the premise of basically not increasing the project cost.

The present invention relates to a spring for a preloaded bearing, in particular a rolling bearing, with an elastomeric core, wherein the elastomer core comprises a support sleeve of a hardenable material is disposed cohesively, and is formed less elastic than the elastomeric core. The present invention also relates to a structural component, which comprises a housing member, a bearing and the spring.