7results about How to "Short release time" patented technology

The application relates to the technical field of flue gas waste heat recovery, and discloses a rotary kiln flue gas low-temperature waste heat recovery device, which comprises a primary recovery chamber, a secondary recovery chamber and a water storage tank, a flue gas inlet pipe is fixedly installed at the left end of the outer wall of the primary recovery chamber, a flue gas connecting pipe one is fixedly installed at the right side of the upper end of the outer wall of the primary recovery chamber, the rear end of the outer wall of the flue gas connecting pipe one is fixedly connected with the front end of the outer wall of the secondary recovery chamber, the temperature of the heat-conducting aluminum sheet one directly contacting the outer wall of the S-shaped flue pipe is increased, the hot end of the thermoelectric sheet can have a constant high temperature, the heat-conducting aluminum sheet two contacting the inner wall of the water pipe one can take away the heat at the heat-conducting aluminum sheet two under the action of the water flowing in the water pipe one, and the cold end is formed, so that a temperature difference is formed between the hot end and the cold end of the thermoelectric sheet, the thermoelectric sheet can generate electricity by utilizing the temperature difference between the high and low temperatures, and the heat energy in the flue gas can be converted into electric energy.

The application provides an energy storage cabinet, comprising: a control module connected with a power supply; an alarm module connected with the control module; a fire extinguishing module connected with the control module; and an explosion venting module comprising an explosion venting valve connected with the control module, wherein the control module controls the opening and closing of the explosion venting valve when a preset condition is reached. The energy storage cabinet provided by the application can timely control the start of the explosion venting valve, shorten the response time of the fire extinguishing system, and timely and quickly release the pressure in the energy storage cabinet.

The present application relates to the technical field of circuit board production, in particular to a circuit board thin tin selective etching method with etch resist protection; after cleaning and drying the circuit board to be etched, the circuit board is subjected to micro-etching treatment with a micro-etching solution, then a thin tin layer is formed on the surface of the circuit board through electroplating process, then the etch resist is evenly coated on the thin tin layer, the copper-clad circuit board coated with the etch resist is subjected to exposure, the exposed thin tin layer is subjected to selective etching with an etching solution, after the etching is completed, the circuit board is subjected to film removal with sodium hydroxide solution, then the circuit board is washed with deionized water and dried, and the selective etching of the circuit board thin tin is completed. The circuit board thin tin selective etching method with etch resist protection provided by the present application can not only ensure that the copper surface and the solidified etch resist have strong bonding force, thereby reducing the loss amount of copper, but also shorten the film removal time and enable selective etching of the etching area.

The window equipment suitable for the pressurized cabin comprises a window frame body, a control device, a power source, a switch and a detection device, the window frame body is used for being connected with a window hole in the pressurized cabin body, a frame body opening is formed in the window frame body, and the control device is connected with the power source; the window frame body is connected with a flexible film layer, the flexible film layer covers an opening of the frame body, and an electric heating wire is arranged in the flexible film layer; the switch is connected with the power supply, two ends of the heating wire are respectively connected with the switch and the power supply, the control device is respectively connected with the switch and the detection device, and the detection device is used for detecting environment information in the pressurized cabin and sending the information to the control device; when the environment information meets the preset condition, the control device controls the switch to be closed so that the electric heating wire can be heated to melt the flexible film layer. The safety of the pressurized cabin can be improved.

This utility model discloses a power-on / off testing circuit and device for electricity meters. The circuit includes a main control module, a 485 communication module, a power supply module, and a relay module. The 485 communication module is connected to a host computer and the main control module, and is used to receive power-on / off test parameters sent by the host computer, convert the test parameters into electrical signals, and input them to the main control module. The power supply module is connected to both the main control module and the electricity meter under test, and is used to provide power to both the electricity meter and the main control module. The relay module is connected to both the main control module and the electricity meter under test, and is used to control the electricity meter under test to perform power-on / off testing according to the electrical signals received by the main control module. This utility model can improve the testing effect and efficiency of power-on / off testing of electricity meters.

The present application relates to a safety clamp cylinder with electromagnetic quick release valve for drilling rig hydraulic disc brake system. The cylinder includes cylinder barrel, piston, disc spring and rod cavity, and the innovation is that the rod cavity integrates parallel double relief circuits: the main relief circuit is directly connected to the remote hydraulic station through the first oil way; the emergency direct discharge circuit is controlled by the electromagnetic quick release valve, and is directly connected to the oil tank through the second oil way, valve body and third oil way. When emergency braking, the electromagnetic valve is opened to open the emergency circuit, and the oil is discharged through the double paths, and the piston pushes the brake block under the action of the disc spring. The present application shortens the relief path through the integrated design of the valve body and the cylinder barrel, has short response time, and builds a redundant safety mechanism, which can still discharge independently when the hydraulic station fails, completely solves the problems of braking lag and single point failure, and improves the safety of drilling equipment.

The utility model relates to a chamber touch sealing safety mechanism which comprises a fuse body, a safety pin cavity and a sealing cavity are arranged in the fuse body, a safety pin is arranged in the safety pin cavity, a sealing cap is arranged at the top of the sealing cavity, a gasket is arranged below the sealing cap, and a sealing screw is arranged in the sealing cavity. The safety release device can release safety at the moment when ammunition flies out of the ammunition cabin, the safety release time is short, the sealing performance can be kept before and after safety release, the structure is simple, and the reliability is high.