49results about How to "Wide working pressure range" patented technology

Disclosed is a high-pressure high-flow alternating-current servo direct-driven threaded flow valve. An alternating-current servo motor directly drives a valve spool to open and close by the aid of transmission of threads, and the threads only need to transmit driving force on a single side during integral operation of the valve due to hydraulic force, and are selectively one-way transmission saw-toothed threads. The valve is simple in structure, accurate in control and convenient in use, can be directly digitally controlled by a computer and has excellent buffering and positioning performances, the requirement on positioning at an optional point can be met, a closed-loop system with an electrical feedback function can be realized, particularly, the problem that an original servo valve is sensitive to oil pollution can be effectively solved, and shortcomings that the original servo valve is used difficultly in high-pressure and high-flow environments and the like are also overcome. In addition, the valve is wide in working pressure range and high in flow, and can also work under extremely low oil supply pressure, the dynamic performance of the valve is rarely affected by the oil supply pressure, and the efficiency of a system can be improved due to the fact that intermediate transmission links are few.

A water evaporation method and its device is to heat a seal container with an atomizing jet to over 140 deg.C to spray water to the internal wall of the container from the jet to steam it then IF induction method is applied to heat the container or the steamed water is input into a solenoidal steam adjuster to be heated by another induction heater wrapped on the steam adjuster. Steaming device has a seal cylindrical shell with a spray tube having an atomizing jet inside to form a steam generator, the cylinder shell is set in the heating device. The solenoidal induction heater wrapped outside the steam generator can be the heating device and solenoidal steam adjuster sleeved tightly by another induced heater can be set outside the generator with connecting inlets and outlet of the steam adjuster with exhausting steam tube.

An efficient down-hole hammer comprises a back joint, a check valve, an air distribution rod, a piston, a cylinder, a clamping ring, a drill head and a front joint. The check valve is a one-way valve and comprises a valve seat, a spring and a steel washer. The slotted piston is provide with a hole, a positioning sleeve is arranged at the back end of a valve end cover, and the air distribution rod, a positive vibration-proof rubber ring and a negative vibration-proof rubber ring are clamped in the positioning sleeve together. The efficient down-hole hammer is not provided with an inner cylinder structure, the air distribution mode is greatly innovated, a vibration-proof fine tuning device arranged between the back joint and the air distribution rod can effectively absorb counterforce of piston motion, the air distribution rod can be subjected to automatic fine tuning so as to keep the assembling verticality, the adaptive drill head is not provided with a tail pipe, and therefore high pressure air leakage is reduced, work efficiency is improved and production cost is reduced. In addition, the piston has a reliable service life.

The invention discloses a multilevel control valve, comprising a reversing valve component, a safety valve component and a valve body; wherein, the reversing valve component comprises a reversing valve liquid intake cavity communicated to a balance cylinder of a hydraulic support, a reversing valve control cavity communicated to an upright column cylinder of the hydraulic support and reversing valve liquid return cavity communicated to the safety valve component, a valve core and a valve sleeve positioned inside the reversing valve component, an adjusting spring for the reversing valve component which is arranged inside the reversing joint of the reversing valve component and puts the predetermined load on the reversing valve core through the a spring base and an ejection pin, and a reversing joint matched with the reversing ejector pin under the action of the predetermined load of the adjusting spring in the reversing valve component; the safety valve component comprises a liquid intake cavity connected with the reversing valve liquid outlet cavity used to empty the reversing valve liquid return cavity, a valve core of the safety valve, a valve spring of the safety valve and a safety valve guiding piston matched with the valve core of the safety valve under the action of the predetermined load of the valve spring of the safety valve. The invention has the advantages of prolonging the service life of the high hydraulic support balance cylinder, improving the stability of the gesture adjusting of the hydraulic support and guaranteeing the safe operation of the hydraulic support.

The invention discloses an ultraviolet lamp ionizing device taking photoelectrons as an electron source. The ultraviolet lamp ionizing device comprises an ionizing cavity, an ultraviolet lamp, a repulsion electrode, a focusing ring, an orifice plate, a capillary sample and a lens system. In the invention, the ultraviolet lamp generates photoelectrons on the metal electrode, and then the photoelectrons are accelerated to be collided with molecules of the sample by utilizing an electric field to realize electron ionizing. The ultraviolet lamp ionizing device has the characteristics of wide range of samples to be tested, oxidation resistance, long service life, wide working voltage range and the like so as to have broad application prospect on the aspects of process monitoring and pollutant real-time on-line analysis.

The invention provides a novel atomizing nozzle based on bubble cutting. The novel atomizing nozzle comprises an internal assembly and an external assembly, wherein closed space formed by the internalassembly and the external assembly constitutes a mixing chamber of the nozzle, the internal assembly comprises an inner core and a bubble divider, the external assembly comprises a casing and a sprayhead, a first air inlet hole is formed in the top of the inner core, an external thread is formed at the upper part of the inner core below the first air inlet hole, multiple second air inlet holes are formed in the inner core below the external thread, and swirling grooves are formed in the inner core located below the second air inlet holes; the casing is a hollow opening round tube, an internal thread at the upper part of the casing is tightly connected with the external thread on the inner core through a sealing structure, a liquid inlet hole is formed in the side surface of the casing, and an external thread is formed at the lower part of the casing; an internal thread is formed at the upper part of the spray head, a spray hole is formed in the central position of the closed end of the spray head, the bubble divider is mounted in a hollow cavity in the lower part of the casing, and the casing and the bubble divider are tightly connected with the spray head through a sealing structure. The novel atomizing nozzle has higher atomizing quality, and the average diameter of particles is smaller and more uniform.

The invention discloses an adjustable dynamic flow balance valve with an internal lining, which has the function of the dynamic flow balance valve and can adjust the flow capacity passing the valve within certain pressure difference according to the requirement. The invention comprises a valve body, the internal detachable valve lining, a gland cover, a connecting rod and an actuator. The valve lining is fixedly mounted inside the valve body. The connecting rod connected with the valve lining drills through the upper gland cover to be connected with an adjusting handle or the actuator. The opening degree of the valve is controlled for adjusting the flow capacity. The valve lining comprises a pressure sensing board, a pressure regulating slide sleeve, an internal spring, an external spring, the upper end cap with the correction conical surface of the valve lining, a current regulating cylinder body and a lower cylinder body. The invention has the advantages of large current regulating range, large flow capacity, high control precision, broad working pressure difference, convenient assembly, long service life, detachable valve lining and low manufacture cost. The invention can be applied to the central air conditioner, the water system of the heating network, petroleum industry, chemical industry and electric power plant, fundamentally solving the problem of hydraulic disorder and meeting the requirement of flow control.

The invention discloses an intelligent atomizing device of a breathing machine. An atomizer is spirally installed at the upper end of a volume cup. An upper end cover is installed on the top of the atomizer. A one-way valve is arranged on the upper end cover and sleeved with a connecting pipe. A discharge port is formed in the side wall of the volume cup. A rubber plug is arranged in the discharge port. A gas inlet port is formed in the lower end of the volume cup and sleeved with a connecting port. The connecting port is connected with a gas flow controller through a guide pipe. The gas flow controller is connected with the port of the breathing machine through a flow division port. Gas flow power used by the atomizing device comes from the breathing machine, flow speed is stable, flow is more precise compared with the prior art, the oxygen concentration and tidal volume of the breathing machine during treatment are not influenced, the safety of patients is ensured, and it can be ensured that medical work and nursing work are smoothly conducted; in the medicine addition process, by means of the discharge port in the outer side of the volume cup, the upper cover of the atomizer does not need to be opened, and ventilation continuity can be ensured.

The invention provides a bubbling device and a measuring method for measuring Young modulus of a two-dimensional material, and the bubbling device comprises a pressurizing system and a pressure chamber connected in sequence, wherein the top of the pressure chamber is provided with an upper air port; a bearing substrate for carrying the two-dimensional material to be tested is fixed at the upper air port; and a through hole is defined at a position corresponding to the upper air port of the bearing substrate. The bubbling device provided by the invention implements a wide range of pressure regulation, controllable deformation and continuous strain loading on a two-dimensional material through the bubbling device designed and processed by itself, the in-situ characterization of the bubblingmorphology is carried out with an atomic force microscopy, and a Young modulus value of corresponding material is calculated based on the thin film theory.

The invention discloses a wide head rotor of a high vacuum displacement pump. In an existing cam pump technology, seal between a pump body and a rotor is linear pump, and therefore, vacuum capacity is easily caused to drop after the rotor and the pump body are worn. The end surface of the wide head rotor of the high vacuum displacement pump is of an axisymmetric structure, and a 1/4 molded line of the end surface consists of three parts: a top end wide head circular arc AB, a transition curve BD and an intermediate circular arc DE, and the rotor is formed by wrapping a metal framework and rubber; and the top end wide head circular arc AB and the intermediate circular arc DE of the wide head rotor are two conjugate curves. The wide head rotor effectively increases a working pressure range of the high vacuum displacement pump, ensures lasting stability of conveying pressure, reduces pulsation and improves working efficiency.

The invention relates to a low flow resistance and high pressure pneumatic damping ball valve with a self-locking function, comprising an inlet shell, a flow guiding sleeve, a sphere and an outlet shell. The inlet shell is sleeved outside the flow guiding sleeve and connected with the outlet sleeve. The sphere is arranged between the flow guiding sleeve and the outlet sleeve. The low flow resistance and high pressure pneumatic damping ball valve further comprises a high-pressure air source, a pneumatic rotating-shaft component, a pneumatic lockpin component and a pneumatic valve component. According to the low flow resistance and high pressure pneumatic damping ball valve, the technical problems that the existing pneumatic control ball valve needs to be maintained by external energy after being opened and has requirements on control pressure and use occasion are solved. The pneumatic damping ball valve with small low diameter reduction ratio, low flow resistance and high pressure and with the self-locking function is used for controlling the opening and the closing of a liquid pipe in a liquid pipe control system.

The invention discloses an absorption circulating system based on a temperature and pressure raising technique and belongs to the field of energy recycling. The absorption circulating system based onthe temperature and pressure raising technique comprises a temperature and pressure raising sub circle and an absorption power sub circle. The temperature and pressure raising sub circle comprises a generator, a first separator, a condenser, a first working medium pump, an evaporator and a temperature and pressure booster, wherein an inlet of the first separator is connected to an outlet of the generator; an inlet of the condenser is connected to a gas outlet of the first separator; an inlet of the first working medium pump is connected to an outlet of the condenser; an inlet of the evaporatoris connected to an outlet of the first working medium pump; and a gas inlet of the temperature and pressure booster is connected to an outlet of the evaporator. An inlet temperature and an inlet pressure of a turbine are enhanced by means of power circular waste heat/conventional waste heat, and the working condition of the turbine is improved, so that energy is utilized thoroughly more effectively. In addition, compared with a conventional circle, a transformation mode is relatively easy to achieved, so that an existing industrial waste heat utilizing level is improved favorably.

The invention discloses a pneumatic control three-position and three-way reversing valve. The pneumatic control three-position and three-way reversing valve comprises a valve body, an upper sealing bracket, an intermediate sealing bracket and a lower sealing bracket are sequentially arranged in the valve body in the vertical direction from top to bottom, first sealing rings and second sealing rings are correspondingly arranged at the two ends of the upper sealing bracket, the intermediate sealing bracket and the lower sealing bracket, and an air source port communicating with the upper sealingbracket, a testing port communicating with the intermediate sealing bracket, and an exhaust port communicating with the lower sealing bracket are formed in the valve body. The pneumatic control three-position and three-way reversing valve is suitable for the valve body, the gas path switching of pressurization, detection and exhaust of a tested object can be achieved, testing can be conducted bythe negative pressure and the positive pressure, the working pressure range is large, meanwhile the universality of the valve body is high, the structure is compact, the volume is small, and the manufacturing cost of an instrument is effectively lowered.

The invention relates to a special dust collector for a clean room and belongs to the fields of biological medicine, precision machining and machinery. By arranging a dust collecting system of the special dust collector outside the clean room completely and by using an air storage tank which has certain volume and is pumped to certain vacuum degree through a mechanical pump to provide suction force, various dusts and pollutants in the clean room can be sucked to the outside of the clean room flexibly and efficiently, and no secondary pollution can be caused. By means of joint effect of the mechanical pump and the air storage tank, working pressure of the special dust collector has a wide adjustable range, the suction force can be set and adjusted flexibly, and a suction head and a suction pipeline can be switched freely. Meanwhile, device maintaining is simple and efficient. By means of the special dust collector, various pollutants can be removed efficiently, and local cleaning work in the clean room is greatly facilitated.

The invention discloses a test chamber tooth-meshing type quick-opening manhole, and belongs to the technical field of test bench test chamber devices. The manhole comprises a cylinder, a cylinder flange, lug plates and a rotating shaft. The cylinder, the cylinder flange and the lug plates are welded, the rotating shaft is inserted into the lug plates, and the two ends of the rotating shaft are limited and fixed through nuts. The manhole also comprises a cover flange and a cover, the cover flange is welded to the cover, a fixing shaft is arranged on the cover and provided with a bearing type rotary mechanism, and the bearing type rotary mechanism and the rotating shaft are fixedly connected with a rotary arm. Teeth are uniformly distributed on the circumference of the cylinder flange and on the circumference of the cover flange, and the cover flange is rotated to mesh with or disengage with the teeth of the cylinder flange to close or open the manhole, so that when the manhole is opened, the rotary arm can rotate around the axis where the rotating shaft is located, and when the manhole is closed, the cover flange and the cover can flexibly rotate around the axial direction of the fixing shaft. The manhole is simple and reasonable in structural design, low in cost and capable of being quickly opened and closed, the working intensity for opening and closing the manhole is reduced, and the sealing effect is good.