37results about How to "Good pressure retention" patented technology

The invention discloses a liquid pressure-maintaining and sampling tube which comprises a connector, two cavities and two sampling valves, wherein the two cavities are respectively connected with the two ends of the connector; a communicating hole is formed in the connector and communicated with the two cavities, and ladder-shaped through holes are an outer end hole, a sealing hole, a flow guide groove and a flow guide hole from outside to inside in sequence and are formed in the two cavities; each sampling valve is composed of a valve body, a sealing shaft and a valve rod which are connected in sequence, matched with the corresponding ladder-shaped through hole through threads and fixed in the ladder-shaped through hole, each sealing shaft is in close fit with the corresponding sealing hole, a ball is propped against the end part of each flow guide hole, and pistons are respectively arranged in the two cavities. The liquid pressure-maintaining and sampling tube disclosed by the invention can realize spontaneous sampling without an additional drive device, is simple in structure, convenient to operate, good in pressure-maintaining property and reliable in sampling and can be recycled.

The invention relates to a rotary valve type valve rod and a control valve in order to overcome the defects of difficult machining and high fabrication cost of existing rotary valve type valve rods. The rotary valve type valve rod comprises a plurality of valve rod sections; valve rod oil channels are designed in the valve rod sections; the adjacent valve rod sections are sequentially and fixedly connected in the axial direction; the positions, on the axial end faces of the valve rod sections, of the valve rod oil channels are communicated with the outside or with the valve rod oil channels in the adjacent valve rod sections; some valve rod sections are provided with spherical surface joints which are provided with annular spherical surfaces surrounding the valve rod sections; each annular spherical surface is provided with a valve rod oil opening which is communicated with the corresponding valve rod oil channel. The valve rod is mainly composed of the multiple valve rod sections, the machining difficulty of the valve rod sections is low, and molding for forming the valve rod oil channels is simple. Meanwhile, the structures of part of the multiple valve rod sections forming the valve rod can be made to be identical, the interchangeability can be greatly improved, and the machining difficulty can be greatly reduced.

The invention relates to a high pressure die-locking circuit of a dual-motion plate direct pressure injection machine, comprising an oil pump which is driven by an electric motor, an electromagnetic reversing valve, an electromagnetic switch valve, overflow valves, a hydraulic control check valve and a high pressure die-locking oil cylinder; the electric motor drives the oil pump; the oil outlet of the oil pump is connected with the electromagnetic reversing valve; one working oil nozzle of the electromagnetic reversing valve is connected with the high pressure chamber of the high pressure die-locking oil cylinder through the hydraulic control check valve; another working oil nozzle of the electromagnetic reversing valve is connected with the recovery chamber of the high pressure die-locking oil cylinder; the oil outlet of the oil pump and the recovery chamber of the high pressure die-locking oil cylinder are both provided with the overflow valves; the non-rod chamber of the high pressure die-locking oil cylinder is connected with an oil tank through the electromagnetic switch valve. The proposal sufficiently considers the working characteristics of the dual-motion direct pressing injection machine and optimizes and simplifies the high pressure die-locking control oil path, and the invention is the high pressure die-locking circuit of the dual-motion direct pressing injection machine with more reasonable structure.

The invention provides an automatic production line device for packaging an oxygen sensor. The automatic production line device comprises a China stone powder pre-pressing unit, a China stone powder repressing unit, a protective inner and outer cover welding unit, an inner steel cover packaging unit, an outer steel cover welding unit and a wire harness rolling unit, wherein the structures of the protective inner and outer cover welding unit and outer steel cover welding unit are the same, a laser beam is used for welding a protective pipe inner cover, a protective pipe outer cover and an outer steel cover with a hexagonal base together so as to protect an interior sensor chip. According to the automatic production line device, the units are sequentially connected according to the assembling technology of the oxygen sensor, and semi-automatic and full-automatic assembling of the oxygen sensor product is realized, so that the product quality can be stabilized and improved, the working conditions are improved, the occupied area for production is reduced, the production cost is reduced, and the production cycle is shortened.

The invention provides an optical path transmitting and reversing device. The optical path transmitting and reversing device comprises a input light cylinder, a reversing cylinder, an optical bracket,a first output light cylinder, a second output light cylinder, a top plate and a bottom plate, wherein the reversing cylinder is a partially hollow cylinder; the reversing cylinder is fixedly mountedon the bottom plate; the optical bracket is mounted inside the reversing cylinder; a reflector is fixedly mounted on the optical bracket; multiple side plates connected with the input light cylinder,the first output light cylinder and the second output light cylinder respectively are arranged around the reversing cylinder; the top plate is mounted on the top of the reversing cylinder; a turnplate capable of rotating the reversing cylinder is arranged on the top plate; a limiting mechanism is further arranged on the top plate, and the limiting mechanism can limit the optical bracket to be ina first state or a second state different from the first state. The invention further provides an optical performance parameter detection system comprising the optical path transmitting and reversingdevice.

The invention provides a gas-liquid balancing device for a vertical ram milling head, which can realize balance of a machine ram. The invention adopts the following technical scheme that the gas-liquid balancing device for the vertical ram milling head comprises two balancing cylinders, an energy accumulator and an overflowing and throttling structure; the two balancing cylinders are respectively arranged on both sides of the ram milling head; the energy accumulator is simultaneously connected with oil outlet pipelines of the two balancing cylinders through a main pipeline by a three-way connecting mechanism; the energy accumulator is provided with an oil drainage branch circuit; the overflowing and throttling structure comprises a safety valve, a first control valve and a second control valve; the safety valve and the first control valve are arranged on the oil drainage branch circuit; and the second control valve is arranged on the main pipeline.

The invention relates to the field of medical instrument design and particularly relates to a drug testing reagent kit and a manufacturing method thereof. The drug testing reagent kit comprises a kitbody, a kit cover, a holder, a sleeve, a reagent bottle and a bottle cap, wherein the bottle cap is manufactured by using a bottle cap stack mold type hot runner injection mold. The air tightness andaging resistance of the bottle cap of the reagent bottle, manufactured by the bottle cap stack mold type hot runner injection mold, are greatly improved.

The invention discloses a production method of a high-purity dense arsenopyrite electrode. The production method of the high-purity dense arsenopyrite electrode comprises the steps of selecting arsenopyrite ore particles; cleaning the selected arsenopyrite ore particles, and then drying the arsenopyrite ore particles for use; grinding the dried arsenopyrite ore into powder in meshes of 200 or above, weighing 0.8-1.0 g of the powdery arsenopyrite ore, and after the powdery arsenopyrite ore is compressed into arsenopyrite cylinders in a powder compressing machine, wrapping the arsenopyrite cylinders with silver foil; pressing the arsenopyrite cylinders wrapped with the silver foil into boron nitride to produce boron nitride cylinders which contain the arsenopyrite cylinders wrapped with the silver foil; placing the boron nitride cylinders which contain the arsenopyrite cylinders wrapped with the silver foil into a pyrophyllite lump high-pressure assembly; conducting sintering at high temperature and high pressure in a large-cavity press machine; and stripping off the surface silver foil of a sample subjected to sintering to produce the arsenopyrite electrode. The technical problems that high-temperature and high-pressure electrochemistry experiment research on arsenopyrite requires good pressure maintaining performance of arsenopyrite ore, however, natural arsenopyrite ore hardly meets the condition, and the like are solved.

The invention provides a cartridge valve cover plate device. The cartridge valve cover plate device comprises a cover plate body, a threaded cartridge type hydraulic reversing valve, an external control oil way and an internal control oil way; the cover plate body is provided with the threaded cartridge type hydraulic reversing valve, and the internal control oil way is arranged in the cover platebody; the external control oil way comprises an X pilot control oil way; and the internal control oil way comprises a first hole channel, a Z1 pilot control oil way, a Z2 valve element locking oil way and a Y oil drainage opening oil way. When pilot control oil is fed back to a port a of the threaded cartridge type hydraulic reversing valve through the Z1 pilot control oil way through a port X ofa bottom plate of the valve body, a valve element of the threaded cartridge type hydraulic reversing valve is located at the left position, at the moment, a port I communicates with a port III, and aport AB of a main oil way is communicated; when pilot control oil is not given, the threaded cartridge type hydraulic reversing valve returns to the original position, the main valve element of the main oil way is pressed on the valve seat to cut off an opening AB of the main oil way, the pressure maintaining effect is achieved, the damage rate of the hydraulic control one-way valve is effectively reduced, and the cartridge valve cover plate device has the advantages of being resistant to impact, small in leakage amount, capable of effectively maintaining pressure and long in service life.

The invention provides a locking pump for fast punch sliding-block oil cylinder locking. The locking pump comprises a locking pump shell, a first piston, an unloading one-way valve, an oil returning opening, a cylinder cover, an oil outlet, an oil suction and an air pump, wherein the first piston is arranged on the left end side of the locking pump shell, the unloading one-way valve is installed on the right side of the first piston, the oil returning opening is formed in the bottom of the locking pump shell, and the oil returning opening communicates with the unloading one-way valve; the cylinder cover is installed on the left end side of the locking pump shell and wraps the first piston, an unloading air supply opening is formed in the middle of the cylinder cover and communicates with the first piston, the oil outlet is formed in the middle of the front side of the locking pump shell, and a discharge one-way valve is arranged at the oil outlet; and the oil suction is formed in the bottom of the locking pump shell, a suction one-way valve is installed at the oil suction, and the air pump is installed on the right side of the locking pump shell. According to the locking pump for fast punch sliding-block oil cylinder locking, it can be guaranteed that the locking pump cannot be influenced by the change of oil pressure in a sliding block oil cylinder, and the stability of the oil cylinder pressure can be better maintained.

The invention discloses a curved-surface hydraulic device for forming of an air conditioner reservoir compressor connection bracket. The curved-surface hydraulic device comprises a hydraulic device main body, a hydraulic cylinder and a hydraulic pump station; the top of the hydraulic device main body is provided with an upper transverse beam, and the upper transverse beam is fixedly connected withthe hydraulic device main body; a piston rod is arranged at the bottom of the upper transverse rod and movably connected with the upper transverse beam, the top end and the bottom end of the piston rod are provided with adjusting nuts correspondingly, and the adjusting nuts are fixedly connected with the piston rod; the middle of the hydraulic device main body is provided with a middle beam, andthe middle beam is fixedly connected with the hydraulic device main body; and the top of the hydraulic device main body is provided with a liquid filling box. When a hydraulic actuating mechanism, thehydraulic cylinder or a hydraulic motor operates in an accelerated mode under the action of loads, a hydraulic system cannot supply oil in time, and using is conducted in order to avoid the vacuum condition; and the curved-surface hydraulic device has the characteristics of being excellent in machining, high in precision, free of leakage and good in pressure maintaining performance, the curved-surface hydraulic device is provided with a slow-action valve core, and thus, the curved-surface hydraulic device is safe and has wide using prospects in the future.