6results about How to "Avoid vaporization" patented technology

The application discloses an environmental protection gas load switch and belongs to the electrical equipment field, which is used to solve the problem of how to inhibit or eliminate the arc generated when the static contact and the moving contact of the load switch are disconnected. The environmental protection gas load switch comprises a shell, a moving contact, an operating mechanism, a first static contact and an arc extinguishing device. The moving contact is rotatably arranged in the interior of the shell, the operating mechanism is used for controlling the rotation of the moving contact, and the first static contact is fixedly arranged in the interior of the shell. The arc extinguishing device comprises a shell body, a rotating arm, a vacuum bubble and a reset spring, the shell body is fixedly arranged on the shell, the rotating arm is rotatably arranged on the shell body and is provided with an electrically conductive part, the electrically conductive part is arranged on the rotating path of the moving contact, the vacuum bubble is arranged on the shell body, and the two ends of the vacuum bubble are electrically connected with the electrically conductive part and the first static contact respectively, and the reset spring is arranged between the rotating arm and the shell body. When the moving contact is disconnected with the first static contact, the moving contact is electrically connected with the electrically conductive part.

The present invention provides a norbornene preparation method, which comprises that ethylene and cyclopentadiene are subjected to a reaction in an ionic liquid to prepare the norbornene. The preparation method of norbornene provided by the invention has the characteristics of lower reaction pressure and higher safety.

A separation and recovery device for thiophene-containing BT oil includes a BT oil thiophene removal system, a first distillation column, and a second distillation column. The inlet of the BT oil thiophene removal system is connected to a BT oil source, and the outlet is fed to the first distillation column via a first pipeline. The outlet of the condenser at the top of the first distillation column forms a first benzene outlet, and a first reflux pipeline is provided connected to the reflux port of the first distillation column. The bottom of the first distillation column is fed to the second distillation column via a second pipeline. The top of the second distillation column is connected to the inlet of the reboiler heat exchange medium channel at the bottom of the first distillation column via a third pipeline. The outlet of the reboiler heat exchange medium channel at the bottom of the first distillation column forms a second benzene outlet, and a second reflux pipeline is provided connected to the reflux port of the second distillation column. This invention has a simple structure, is easy to operate, and can effectively separate and recover benzene and toluene from BT oil with high purity. It also effectively reduces the heat load of separating benzene and toluene, and can handle high-concentration thiophene petroleum benzene.

The application provides a fluorine pump starting method, a control device, a double-circulation refrigeration system and a computer readable storage medium, which can shorten the time required for starting the fluorine pump and improve the success rate of starting the fluorine pump. The fluorine pump starting method comprises the following steps: determining that the condition for starting the fluorine pump by the compressor is met; and starting the fluorine pump by the compressor. In the step of starting the fluorine pump by the compressor, the compressor is started first, then the fluorine pump is started, and the compressor is turned off after the fluorine pump is started.

The application provides an aluminum alloy water-cooled plate laser welding device and method, and relates to the technical field of laser welding.The aluminum alloy water-cooled plate laser welding device comprises a laser, a water-cooled plate laser head and a welding machine tool, the water-cooled plate laser head comprises a laser galvanometer and a multi-spot beam splitting assembly arranged in sequence along the laser transmission direction; wherein the laser galvanometer is used for realizing spiral swinging of the laser emitted by the laser; the multi-spot beam splitting assembly is used for splitting the laser into light spots; the welding machine tool is connected with the water-cooled plate laser head and is used for driving the water-cooled plate laser head to move; the action of the welding machine tool and the laser galvanometer makes a plurality of light spots on the aluminum alloy water-cooled plate form a welding pattern which simultaneously spirally swings. The aluminum alloy water-cooled plate laser welding device realizes multi-point simultaneous welding on the water-cooled plate plane, is beneficial to the overflow of pores, performs stirring welding through rotating light spots, reduces the stirring frequency, is stable in the process, can effectively inhibit the generation of pores and reduce the porosity of the welding bead.

The utility model relates to the technical field of brake calipers, in particular to a high-strength brake caliper. According to the technical scheme, an oil return opening and an oil inlet are formed in a caliper body, a mounting groove is formed in one side of the caliper body, the mounting groove of the caliper body is communicated through a communication hole, a flow channel is formed in the oil inlet, the oil inlet is communicated with the oil return opening and the mounting groove through the flow channel, a mounting hole is formed in the caliper body, and the oil return opening is communicated with the mounting groove through the flow channel. The caliper body is provided with an end cover through the mounting hole, the end cover is provided with a sealing edge and a second sealing groove, and the end cover is in sealed butt joint with the mounting hole through the sealing edge and the second sealing groove. The caliper body is firstly provided with the mounting hole and then provided with the mounting groove, tight butt joint is achieved through the end cover sealing edge and the second sealing groove, and the sealing performance is improved. The oil inlet and return opening is communicated with the mounting groove through the flow channel, smooth hydraulic driving is guaranteed, braking heat attenuation is effectively restrained by matching with the design of the heat dissipation holes, and the reliability and the service life of the brake calipers are all-directionally improved.