2results about How to "Accurate pressure value" patented technology

The application discloses a piston system structure of a non-rotating piston for a piston pressure gauge, and relates to the technical field of pressure measuring devices.The piston system structure comprises a base, a piston cylinder, a driving device, a vertically arranged first piston rod and a hollow second piston rod.The piston cylinder is arranged in the base and rotationally matched with the base.The driving device can drive the piston cylinder to rotate through a transmission mechanism.The bottom end of the first piston rod extends into the piston cylinder and is slidingly matched with the piston cylinder.The top end of the first piston rod is fixedly connected with a piston which is used for being fixedly connected with a weighing tray.The pressure weighing tray is arranged above the base.The second piston rod is fixedly connected with the base, and the top end of the second piston rod extends into the piston cylinder.The bottom end of the second piston rod is communicated with the liquid outlet of a pressure injection device through a pipeline.The piston system structure can effectively avoid the measurement error caused by the deflection of the piston by driving the piston cylinder to rotate and making the piston not rotate.

The utility model discloses medical perfusion pump pressure measuring module, including pressure response part and sensor lock sleeve part, the sensor lock sleeve part has the socket of built -in pressure sensor, the pressure response part includes the plug and diaphragm, the plug is detachable with socket and is equipped with the pressure chamber of being accessible perfusion pipeline in, the pressure chamber is equipped with the piece groove of being detachable closed by diaphragm at the cavity wall, the diaphragm can be close to pressure sensor when the plug is connected together with socket, and installation is simple, and pressure monitoring is accurate, and the leakage phenomenon is not easy to take place.