4results about How to "Suitable pressure" patented technology

The utility model discloses a blood vessel compression hemostasis device, belongs to the technical field of medical supplies, and is used for solving the technical problems that a common binding tourniquet is not easy to master the compression force on a blood vessel after binding and the binding hemostasis efficiency is low. The utility model discloses a blood vessel compression hemostasis device which comprises a hemostasis patch and a compression belt. The compression belt comprises an elastic section, a scale and a fastener; the scale comprises a second fixed end and a marking part; the first fixed end and the second fixed end of the elastic section are fixedly connected; the ruler is arranged in the elastic stretching direction of the elastic section, the distance between the second fixing end and the marking part is larger than the length of the elastic section, and the marking part is used for marking the stretching position of the elastic section. The fastener is located at the end of the compression belt and can fix the stretching length of the elastic section, so that the compression belt conducts compression hemostasis on the blood vessel through the hemostasis patch. The blood vessel compression hemostasis device is convenient to operate, and the hemostasis effect is improved.

The invention discloses a sensor support device and system for concrete filled steel tube ultrasonic detection. The sensor support device comprises a grip, a pressing plate and an adsorption mechanism. The lower end of the grip is connected with the pressing plate, and an ultrasonic detection sensor is installed in the center of the bottom face of the pressing plate. At least three groups of adsorption mechanisms are designed, and are uniformly arranged at intervals along the periphery of the ultrasonic detection sensor in the circumferential direction; each adsorption mechanism is provided with a magnet block used for being adsorbed to the outer wall of the steel pipe. The invention also discloses a concrete filled steel tube ultrasonic detection system. The device has the beneficial effects that the magnet block of the adsorption mechanism and the outer wall of the steel pipe can generate stable magnetic attraction acting force, the magnetic force can directly offset part of gravity load of the detection device, detection personnel only need to hold the grip to guide the direction, no extra supporting force is needed, and the device can be preliminarily attached to the surface of the steel pipe; the basic bearing burden of the hand is greatly reduced, and the problem that in the prior art, the labor intensity of workers is large is solved.

This invention relates to the field of geological engineering technology, and in particular to an experimental method for determining the subcritical fracture toughness of fractures under well-closing conditions in shale reservoirs. The method comprises: obtaining a first shale sample and a second shale sample; placing the first shale sample in an experimental system and injecting fracturing fluid into the system until subcritical propagation occurs, then determining the peak pressure required for subcritical propagation; placing the second shale sample in the experimental system and injecting fracturing fluid to the preset well-closing pressure value, without injecting fracturing fluid, then determining whether subcritical propagation occurs in the second shale sample and the time required for subcritical propagation; and finally, calculating the corresponding subcritical fracture toughness. The advantage of this invention is that it enables the determination of whether subcritical propagation occurs in shale gas reservoirs under well-closing conditions, and the calculation of subcritical propagation fracture toughness, providing important theoretical basis and reference for the construction design and scheme optimization of deep shale gas reservoirs.

This invention provides a cooking utensil, comprising: a lid; and an annular nozzle mounted on the lid. The annular nozzle has multiple spray holes at different vertical heights, forming a multi-layered spray hole group. Each layer of the spray hole group has multiple spray holes at the same height, and different layers of the spray hole group create different spray areas on the inner surface of the lid. These different spray areas are arranged vertically. The technical solution of this application effectively solves the problem of poor cleaning effect on the lid in related technologies.