3results about How to "Fixed length" patented technology

The utility model provides a kind of high-speed tunnel mouth soft blocking security control device, including inflatable security control device, audible alarm, tunnel smooth security code and variable information board, inflatable security control device is several and is set towards the direction of tunnel mouth outside tunnel, inflatable security control device includes air blower and security control bag, air blower is connected with the guardrail vertical rod of tunnel by bearing plate, security control bag is connected with the output end of air blower, audible alarm is interval set on the inner wall of left and right sides of tunnel along tunnel direction of travel, variable information board is set at tunnel entrance, tunnel smooth security code is interval pasted on the inner wall of left and right sides of tunnel along tunnel direction of travel, the utility model realizes tunnel security control by the combination of air blower and security control bag, can be blown full and security control to predetermined position in short time, avoid causing vehicle secondary accident, and introduce tunnel smooth security code, and it is pasted on tunnel wall, passive positioning can be replaced for active alarm by tunnel smooth security code, greatly improve security control efficiency, effectively avoid secondary accident caused by other vehicles entering.

The utility model relates to the field of PPR pipe, concretely to a PPR pipe structure of end integrated internal and external thread, including connecting pipe, and the side wall of connecting pipe is opened and passed through and has pipeline b, and the middle part fixed mounting of pipeline b has the baffle, and the side wall of baffle middle part is opened and passed through and has the rotation groove, and the inner rotation groove is installed with the mounting plate, and the arc wall of pipeline b is opened and has a plurality of sliding slots, still include: install the pipe, and the side wall of install the pipe one side is opened and has the installation slot, and the one end of connecting pipe is inserted and is installed in the installation slot. The PPR pipe structure of end integrated internal and external thread, is provided with connecting pipe, and the arc wall fixed mounting of installation slot has a plurality of limit stop, and the limit stop sliding installation is in the sliding slot, and through the both ends of connecting pipe along the installation slot sliding, the limit stop along the sliding slot sliding, to adjust the length of overall pipeline, to be suitable for different installation positions, adjust overall pipeline to the specified position, make the limit stop rotate to the limit slot in the rotation connecting pipe, and the check block is positioned to the limit stop, to fix the length of overall pipeline.