6results 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.

The utility model relates to a pressure release structure and lightning arrester relates to lightning arrester field, the pressure release structure includes seal ring, pressure release plate, press ring and air guide frame, seal ring is fixed, seal ring has the vent hole, seal ring, pressure release plate and press ring are laminated, and seal ring and press ring are fixedly connected, the air guide frame has the vent hole. The air guiding frame is fixedly arranged and located on the side, away from the pressure releasing plate, of the pressing ring. The lightning arrester comprises the pressure release structure. The lightning arrester has the beneficial effects that when the pressure release plate is broken due to the extreme condition that the internal pressure of the lightning arrester is increased, the gas guide frame guides the gas released from the interior of the lightning arrester, so that the gas is released along a determined direction, and the internal pressure of the lightning arrester is prevented from damaging other equipment. The number and the area of the vent holes in the sealing ring can be increased or decreased according to the stress borne by the pressure release plate in different use environments, so that the actual stress borne by the pressure release plate is reduced, and the pressure release plate is prevented from being broken in the normal use period.

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.

The invention relates to a radial adjustable pre-rotation system nozzle adjusting assembly based on a planetary gear, belongs to the technical field of aero-engine pre-rotation, and solves the problems that in the prior art, an engine cooling gas adjusting mode needs a complex driving device, and accurate synchronous control over a pre-rotation system is difficult to achieve. Comprising a main gear bearing, a main gear mounted on the main gear bearing, a driving planetary gear meshed with the inner side part of a gear ring of the main gear, and a transmission module connected with the driving planetary gear, the driving planetary gear is meshed with the driving module, the follow-up planetary gears are meshed with the inner side part and the outer side part of a gear ring of the main gear, each of the driving planetary gear and the follow-up planetary gears is connected with each pre-rotation nozzle rotating shaft, and the driving planetary gear is connected with the driving module; therefore, the driving module drives the pre-rotation nozzle rotating shaft connected with the driving planetary gear through the driving planetary gear.