5results about How to "Small pressure change" patented technology

The utility model discloses a pressure stabilizing pipeline for a water pressure test of an air storage tank, and relates to the technical field of pressure containers. The input end of the first stop valve is connected to the output end of the pressure test pump, and the output end is connected to the input end of the first pipeline; the output end of the first pipeline is connected to the input end of the surge tank assembly; the output end of the surge tank assembly is connected to the input end of the second pipeline; the output end of the second pipeline is connected to the input end of the second stop valve; the output end of the second stop valve is connected to the water injection port of the air storage tank; the piezometric tube is of a bent buffer structure, one end of the piezometric tube is fixedly connected to the top of the surge tank assembly, and the other end of the piezometric tube is detachably connected to the pressure gauge. Therefore, the pressure change generated by the pressure test pump can be effectively buffered, and the test pressure is always maintained in the preset range, so that the risks of equipment damage and process failure possibly caused by pressure fluctuation are reduced.

The utility model relates to the technical field of battery structures, and discloses an explosion-proof battery end cover which comprises a pole and a sealing layer base, the top of the outer wall of the sealing layer base is fixedly connected with a plurality of sealing layer supporting columns, and the top of the outer wall of the sealing layer base is fixedly connected with a rubber base. The top of the outer wall of the rubber base is fixedly connected with a plurality of rubber inner supporting columns, the top of the outer wall of the rubber base is fixedly connected with a plurality of pieces of fluororubber, the tops of the outer walls of the sealing layer supporting columns are fixedly connected with a sealing layer, and the tops of the rubber inner supporting columns are fixedly connected with a rubber top seat. And the top of the fluororubber is fixedly connected with a rubber top seat. According to the utility model, the spring-like fluororubber structure is additionally arranged between the end cover and the battery, and when stress conflicts including external extrusion and internal pressure mutation occur, the spring-like fluororubber absorbs stress by virtue of elastic deformation, so that the shell and the end cover are prevented from being damaged due to stress concentration, and the risk of electrolyte leakage is further reduced to a certain extent.

The utility model relates to the field of additive monitoring equipment, and discloses a waterproof molten pool camera which comprises a machine shell, an imaging unit, an illumination unit and a control unit, the machine shell comprises a main shell body, a front cover body and a mounting plate, an imaging hole is formed in one end of the main shell body, a protection lens is arranged on the front cover body, the front cover body is fixed to the imaging hole, and the protection lens is arranged on the main shell body. The imaging unit is fixed on the main shell to seal a conveying imaging hole, the mounting plate is fixed on the main shell to seal the main shell, the imaging unit, the lighting unit and the control unit are all arranged in the main shell, the imaging unit and the lighting unit are both connected with the control unit, and the control unit is connected with the imaging unit. The imaging unit and the lighting unit are arranged towards the imaging hole and are suitable for adjusting the included angle between the imaging direction of the imaging unit and the lighting direction of the lighting unit, the waterproof and dustproof effects of the molten pool camera can be improved, and the imaging quality of the molten pool camera is guaranteed.

This invention discloses a differential pressure automatic jacketing device, comprising a cylinder with a power cylinder head connected to the top of the cylinder; a hollow piston rod is disposed inside the cylinder, with a power cylinder piston and reversing device connected to one end of the hollow piston rod near the power cylinder head, and a jacketing cylinder piston connected to the other end of the hollow piston rod; a jacketing cylinder head is connected to the bottom of the cylinder; a separation sleeve between the power cylinder and the drain / jacketing cylinder, and a separation sleeve between the drain / jacketing cylinder and the jacketing cylinder are sleeved on the outer wall of the hollow piston rod, the separation sleeve between the power cylinder and the drain / jacketing cylinder being fixed to the inner wall of the cylinder by a first positioning pin; the separation sleeve between the drain / jacketing cylinder and the jacketing cylinder being fixed to the inner wall of the cylinder by a second positioning pin; the cylinder also has a power fluid inlet, a power fluid and jacketing gas outlet, and an air inlet, the air inlet being connected to the jacketing cylinder head via a pipe. This differential pressure automatic jacketing device can efficiently draw jacketing gas from the annulus and discharge it into the production pipeline, is safe and effective, and is convenient to install and maintain.

The application provides a subcutaneous focusing ultrasonic device, and relates to the field of focusing ultrasonic cosmetic technology, which comprises a handle part, an ultrasonic working head arranged at the distal end of the handle part, the ultrasonic working head being configured to be attached to the surface of human skin and emit ultrasonic pulses to the human skin along a first direction to form an ultrasonic focus in subcutaneous tissue, the first direction being perpendicular to the surface of human skin, a flexible connecting part connected between the handle part and the ultrasonic working head, the flexible connecting part being configured to be able to stretch and contract along the first direction to compensate for the depth deviation of the ultrasonic focus caused by the change of holding pressure, and an adjusting system configured to adjust the length change of the flexible connecting part along the first direction, when the holding pressure on the handle part increases, the adjusting system makes the flexible connecting part contract along the first direction, and when the holding pressure on the handle part decreases, the adjusting system makes the flexible connecting part elongate along the first direction. The stability of the ultrasonic focus in the treatment process in the related art is improved.