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The utility model belongs to integrated circuit test technical field especially for a kind of integrated circuit test seat, including base and probe pin, the top of base is fixedly provided with pneumatic cylinder, the output shaft of pneumatic cylinder is fixedly connected with the test seat for being used to test integrated circuit board, the test seat is provided with the convenient clamping mechanism for being used to clamping and fixing integrated circuit board, the top of base is fixedly connected with portal frame, the bottom of probe pin is fixedly connected with mounting plate.The utility model structure design is reasonable, through convenient clamping mechanism, two sliders can be adjusted first, so that two clamping plates abut at the two sides of integrated circuit board, then slightly rotate threaded rod, different specifications and sizes integrated circuit board can be clamped firmly, so that the fixing of integrated circuit board is more convenient and efficient, improve the efficiency of test, and it is beneficial to the disassembly and assembly of probe pin, and it is beneficial to the maintenance work in later period.

This invention discloses a forklift safety speed limiting system, including a safety speed limiting switch, a gearbox control board, and a gear shift lever. The gear shift lever has first and second output ports, and the gearbox control board has first and second input ports. The second output port is electrically connected to the second input port through a first actuator, the first output port is electrically connected to the first input port through a second actuator, and the second output port is electrically connected to the first input port through a third actuator. The opening and closing of the safety speed limiting switch changes the on / off state of the first, second, and third actuators. The first and second actuators are normally closed, and the third actuator is normally open. When a low level is input to the second input port, the gearbox operates in a low gear; when a high level is input to the second input port, the gearbox operates in a high gear. This invention also discloses a forklift with a forklift safety speed limiting system. This invention does not require modification of the vehicle control program or gearbox control program for speed limiting, thus improving forklift safety.

This utility model relates to the field of chemical production technology, specifically to a methanol solvent recovery device for pigment intermediate processing, comprising a tower body, a base, a condenser, and a reboiler. The tower body has a slidingly connected tray, and annular scrapers are fixed on both the upper and lower surfaces of the tray. Each annular scraper is fitted against the inner wall of the tower body. At least two drainage troughs are provided on the inner wall of the tower body near the base, and each annular scraper has a drainage port corresponding to one of the drainage troughs. A lifting assembly is installed inside the tower body, and the lifting assembly is kinetically connected to the tray. A cleaning assembly is installed inside the base, and the cleaning assembly is kinetically connected to the lifting assembly, enabling the cleaning assembly to clean the inner wall of the base. This utility model achieves efficient and rapid cleaning of impurities adhering to the inner wall of the tower body, thereby improving the quality of methanol recovery.