46results about How to "Prevent secondary" patented technology

The invention relates to an all-directional code scanning sorter capable of inducing arrival of express items in the express transportation process to put on a lower side transparent plate; a support arm inner motor controls a lead screw to adjust the lower side transparent clamping plate to ascend and displace and an upper side transparent clamping plate to descend and displace so as to realize clamping of the express items; a back transparent clamping plate moves to a code scanning frame; and a steering engine controls the support arm to rotate to help code scanning so as to realize all-directional code scanning, so that the secondary or multiple scanning is prevented, the efficiency and the convenience are achieved, and the manpower is saved.

The invention provides a terminal box with multiple types of interfaces integrated on one face plate. According to the connection method, due to the fact that the problem that different terminal boxes are installed for the second time or repeatedly installed due to development of the network technology is solved, construction cost is reduced, indoor wiring is standardized, indoor terminal boxes are reduced, cable connection is made to be more reliable, and installation, use and maintenance are all quite convenient to conduct. Dedicated composite cables or split cables enter the multi-purpose terminal box through cable input and output holes, if the dedicated composite cables are adopted, cable bodies in each composite cable are stripped, sleeved with dedicated protective sleeves and fixed with pressing plates, and then the stripped cable bodies are connected with corresponding terminals behind the face plate. If the split cables are adopted, the cable bodies in the split cables are directly connected with the corresponding terminals behind the face plate, and then the face plate covers a base and fixed to the base through screws.

The invention relates to the technical field of medical instruments, in particular to a stent graft used for treating peripheral arterial diseases and provided with a branch stent. The stent graft comprises a main stent and the branch stent, the main stent and the branch stent are each provided with a near end, a far end and an inner cavity arranged between the near end and the far end, an opening is formed in the main stent, the main stent and the branch stent are connected through a connector, the connector is provided with a bottom connected with the opening, a top capable of movably entering and exiting the opening and a connection inner cavity arranged between the bottom and the top, and the near end of the branch stent is connected with the top of the connector. The stent graft has the advantages that the stent graft is used for treating vascular diseases, is wide in adaptability, does not need to be customized, can be used for recovering multiple branch arteries when the peripheral arterial diseases are treated, prevents vascular stents from being implanted twice or many times and simplifies operation difficulty.

The invention provides an acidizing solution for dissolution of a clay mineral and a preparation method thereof. The acidizing solution comprises hydrochloric acid, fluoboric acid, acetic acid, trifluoroacetic acid, hydrogen peroxide, ammonium chloride, dimethylamino-methylbenzotriazole, alkyl ammonium chloride, and polymethylacrylic acid. The acidizing solution provided by the invention can effectively dissolve organic matter, such as clay minerals and cements, in a high-temperature oil-gas reservoir over 160° C., inhibit swelling and migration of clay particles in the presence of water in the acidizing process, avoid secondary deposition of the reservoir, and improve the permeability of the reservoir. The acidizing solution can be prepared and used on the field conveniently and is safe and reliable.

The invention discloses a vertical impact tester which comprises a base frame module, an impact body module, a quick clamp module and at least one inertia triggering module .The base frame module forms a base framework of the vertical impact tester, and at least two guide shafts are longitudinally and vertically arranged in the base frame module .The impact body module comprises a movable carrier plate and a punch installed at the lower end of the movable carrier plate, and the movable carrier plate is connected with the guide shafts through linear bearings .The quick clamp module is installed on a bottom plate on the lower portion of the base frame module, opposite to the punch and used for holding an elastic workpiece to be subjected to impact testing .The inertia triggering modules are installed on the movable carrier plate .The impact body module impacts the elastic workpiece, rebounds and then triggers a locking action, and the impact body module is locked to the base frame module so as to prevent the impact body module from repeatedly colliding with the elastic workpiece .According to the technical scheme, modular design is adopted, the impacting action can be automatically locked after impact testing so as to prevent the elastic workpiece from being impacted twice or many times, and accuracy of testing is guaranteed.