2results about How to "Achieve self-sealing effect" patented technology

The invention discloses a urinary surgery nursing leakage-proof urinary catheterization device which comprises a urinary catheter, a leakage-proof assembly is arranged at the top of the urinary catheter, a fixing assembly is arranged on the outer side of the leakage-proof assembly, a connecting assembly is arranged at the top of the leakage-proof assembly, the leakage-proof assembly comprises an inner tube, the inner tube is fixedly installed at the top of the urinary catheter, and a sealing assembly is arranged at the bottom of the inner tube. The bottom of the catheter is communicated with the outside, the expansion tube is made of elastic silica gel, and the sealing cover is made of silica gel. According to the urinary surgery nursing leakage-proof urethral catheterization device, a leakage-proof assembly of the device is attached to the outer portion of a urethral orifice through a sealing cover to provide certain sealing performance, an expansion pipe is made of elastic silica gel, a screw can be driven to rotate by rotating a rotary knob, a piston plate is pressed downwards to squeeze air in an inflator into the expansion pipe, the air is expanded outwards, and a urethral orifice gap is filled; the sealing performance of the connecting position of the catheter and the urethra is greatly improved, and urine is effectively prevented from leaking out of the communicating position of the catheter and the urethra.

This utility model discloses an intelligent dissolved oxygen regulation device for a biological treatment tank, relating to the field of wastewater treatment technology. Specifically, it includes a water tank, within which an aeration disc and a dissolved oxygen analyzer are fixedly installed. A blower is located outside the water tank, and a frequency converter and controller are located outside the blower. An air supply pipe is fixedly installed at the output end of the blower, and a four-way fitting is fixedly connected to one end of the air supply pipe. An air plate is fixedly installed inside the aeration disc, and several sealing blocks are installed inside the air plate. Several fixing brackets are fixedly installed at the bottom of the air plate. This utility model uses a preset standard dissolved oxygen value and a dissolved oxygen analyzer to monitor the dissolved oxygen content in the wastewater. When the measured value at a certain time does not meet the preset standard value, the controller increases or decreases the blower's airflow and the frequency converter's speed, thereby adjusting the dissolved oxygen value in the water tank in a timely manner, facilitating stable wastewater treatment.