38results about How to "Reduced tightness requirements" patented technology

The invention discloses a method for preparing hindered phenol antioxygens by an ester exchange process, comprising the following steps of: adding reaction raw materials and toluene or mixed xylenes to a reaction kettle, and introducing N2 for protection; heating the reaction kettle to 130-150 DEG C; removing light components until the tower top temperature reaches the boiling point of the toluene or the boiling range lower limit of the mixed xylenes; adding an ester exchange reaction catalyst; when the temperature in the reaction kettle is 140-190 DEG C, starting regulating a reflux ratio controller to be in a total reflux state; when the tower top temperature reaches 63-635 DEG C, regulating the reflux ratio (quantity of reflux: recovery) to be 15-50:25 to recover carbinol; with the reaction, when the tower top temperature reaches 75-90 DEG C, regulating the reflux ratio (quantity of reflux: recovery) to be 5-50:5; and when the tower top temperature reaches the boiling point of the toluene or the boiling range lower limit of the mixed xylenes and is constant at the boiling point for 0.5-2h, finishing the reaction. The method has the advantages of small equipment investment, low cost and small pollution and is suitable for industrially producing the hindered phenol antioxygens.

The invention discloses a single-piston-rod damper and belongs to the technical field of structural vibration control devices. The single-piston-rod damper comprises a cylinder which is divided into a working chamber and a compensation chamber, the working chamber and the compensation chamber are separated from each other through a floating piston which is sealed together with the cylinder, and the working chamber is filled with shear thickening fluid (STF); one end, with the tip being connected with a working piston, of the piston rod is arranged in the working chamber in the cylinder, and the other end of the piston rod is arranged outside the cylinder and connected with an upper connecting part; and an elastic part is arranged in the compensation chamber, one end of the elastic part is connected with the floating piston, and the other end of the elastic part is connected to a rubber piston arranged at the end of the cylinder. When the shearing rate is high and the instantaneous vibration velocity in the working chamber is high, shear thickening of the STF occurs to generate damping force, so that the anti-impact vibration-reduction effect of engineering structures is achieved; and when the shearing rate is low and the instantaneous vibration velocity in the working chamber is low, the elastic part in the compensation chamber elastically compensates for the initial rigidity of the damper, so that vibration reduction and energy dissipation of the engineering structures are achieved. The single-piston-rod damper is provided with the elastic compensation chamber to provide appropriate compensation rigidity, and the anti-impact vibration-reduction effect of the damper is achieved.

The invention relates to the field of facility environment regulation and control, and discloses a positive-ventilation greenhouse environment regulation system, comprising an air-conditioning unit, blast tubes, a CO2 generator and an ozone generator, wherein air inlets of the blast tubes are connected with the air-conditioning unit, the blast tubes each is provided with a plurality of air outlets, the air-conditioning unit is used for filtering air, heating or cooling, humidifying or dehumidifying air, and air meeting requirements on greenhouse environment temperature and humidity is delivered to different position in the greenhouse in a positive-pressure state through the blast tubes. Besides, the CO2 generator is used for increasing concentration of CO2 in the greenhouse, and the ozonegenerator is used for generating ozone for disinfecting the greenhouse. According to the embodiment of the invention, the positive-ventilation greenhouse environment regulation system realizes comprehensive regulation and control on greenhouse environment in the positive-pressure greenhouse environment, delivers humid and cool air to the greenhouse space through the blast tubes uniformly, realizesquick air change and needs low construction cost.

The invention discloses a partition lateral pressure creep test device for a coral sand foundation and an application method of the partition lateral pressure creep test device. The partition lateralpressure creep test device for the coral sand foundation comprises a sand pump, a pressure device and a pushing device. The pressure device comprises a rubber capsule, a capsule top plate and a central steel pipe. The rubber capsule is of a hollow cylindrical structure with an upper opening and a lower opening. The capsule top plate is in sealing connection with the upper bottom surface and the lower bottom surface of the rubber capsule. The central steel pipe penetrates through the axis of the rubber capsule. The sand pump is connected with the rubber capsule through a sand delivery pipe. Thepushing device is connected with the side surface of the rubber capsule, and displacement occurs with the expansion of the rubber capsule. According to the partition lateral pressure creep test device for the coral sand foundation, a partition-type test form is adopted, and meanwhile, solid-liquid mixing is used as an expansion medium for the main pressurizing; and ethanol liquid is subjected toelectronic control heating to generate saturated vapor pressure to perform auxiliary accurate pressure control, and the pressurizing mode lowers the requirements for the airtightness of the device, and guarantees the stability and accuracy of the applied pressure under the long-term creep test.

The invention discloses a flexible direct-current transmission wind and wave hybrid power generation system. The flexible direct-current transmission wind and wave hybrid power generation system comprises a mouse cage type tower frame platform, a wind energy subsystem, a wave energy subsystem, a power regulation unit and a flexible direct-current power transmission station; wind power generation and wave energy power generation are combined, the characteristic that dynamic response of the wave energy subsystem is rapid is fully exerted, wind power generation fluctuation power restraining and tower frame platform inclination active regulation can be achieved, the mouse cage type tower frame platform supports the wind and wave hybrid power generation system, a rigid oval floating body passively regulates the inclination angle of a tower frame, the wave energy subsystem is inversely hung on a round platform, power generation and electric modes can be rapidly switched according to the station, and power grid scheduling power and tower frame inclination angle stability can be ensured; the power regulation unit achieves wind and wave maximum power capturing and power dual-way flowing; the flexible direct-current power transmission station finishes converging and feed of wind wave capturing power. Wind and power output power and tower frame inclination angle stability can be improved,the mounting and maintaining cost can be greatly reduced, and development of the wind and wave hybrid power generation system can be promoted.

The invention discloses a pressure-adjustable core bag type air cushion surge chamber. The pressure-adjustable core bag type air cushion surge chamber comprises a surge chamber body of which the lower end is communicated with a pressure water channel. The pressure-adjustable core bag type air cushion surge chamber is characterized in that a core bag made from elastic materials is arranged in the surge chamber body; the core bag is filled with compressed gases; the upper portion of the core bag is attached to the inner cavity wall of the surge chamber body. According to the pressure-adjustable core bag type air cushion surge chamber, the fluctuation of the water level can be rapidly attenuated, and the air pressure in the core bag can be adjusted at the same time, so that the pressure-adjustable core bag type air cushion surge chamber has the advantages of being low in construction cost, good in air-leakage resistance, better in energy dissipation and pressure adjusting effect, convenient to repair and maintain and the like.

The invention relates to an oxygen concentration adjusting method and system and a driving simulation system. The oxygen concentration adjusting method comprises the following steps that the altitudeH(B) and the temperature T(B) of a simulated area are set, and the oxygen concentration in the air environment of the simulated area is set to be V(B); real-time detection data P(A) and T(A) of an airpressure detection device and a temperature measurement device in the driving simulation cabin are obtained, and the driving simulation cabin is sealed; regression is carried out according to the actual measurement data of the air pressure and the altitude of different altitude areas to obtain the relation between the air pressure and the altitude, and the preset value V(A) of the oxygen concentration in the simulation bin is calculated in combination with PV/T=C (constant amount); and the V(A) is output to an oxygen concentration control device so that the oxygen concentration control devicecan adjust the oxygen concentration in the driving simulation cabin to be V(A) by filtering oxygen molecules in the air, and the oxygen in the air is separated through an oxygen separation technologyto obtain low-oxygen gas.

The invention discloses a device for preventing moisture condensation of a closed bus. The device comprises a dehumidifying system, a drying system and a control system. The dehumidifying system includes an air source cabinet, a communication pipe, an air suction branch, and a first air inlet branch, wherein one ends of the air suction branch and the first air inlet branch are connected with the air source cabinet, and the other ends are connected with a case of the closed bus; and the communication pipe is used for connecting the three-phase cases of the closed bus. The drying system includes an air compressor, a heater, an air exhaust branch, and a second air inlet branch, wherein the air compressor is connected with the heater; the second air inlet branch is respectively arranged on the three-phase cases of the closed bus; the other end of the second air inlet branch is connected with the heater; and the air exhaust branch is connected with the case of the closed bus. The control system includes a temperature and humidity sensor, and a PLC (programmable logic controller) control system, wherein the temperature and humidity sensor is respectively arranged in the three-phase cases of the closed bus, and is connected with the PLC control system. The device provided by invention has low requirement for the sealing performance of the bus, can be used under all conditions, and is convenient and intuitive in use and low in maintenance cost.

The invention discloses a method for preparing calcium fluoride from phosphorous ore-associated fluorine resources, and belongs to the technical field of phosphorus chemical engineering. The method comprises the steps: performing a reaction on a fluorine-containing compound and potassium hydroxide, performing solid-liquid separation after completion of the reaction so as to obtain a silicon-containing potassium fluoride solution, adding a fluorosilicic acid to the silicon-containing potassium fluoride solution so as to adjust the pH value, performing filter separation so as to obtain a potassium fluoride solution and silica-potassium fluorosilicate solid, returning the silica-potassium fluorosilicate solid to the first step, performing a reaction on the potassium fluoride solution an calcium hydroxide, performing solid-liquid separation after completion of the reaction so as to obtain calcium fluoride and a potassium hydroxide filtrate, recycling a part of the potassium hydroxide filtrate to the first step, and concentrating the remaining potassium hydroxide solution so as to obtain a potassium hydroxide product. The shortcoming that fluorine-containing compounds in by-products ofa wet preparation process of phosphoric acid cannot be utilized other than fluorosilicic acid in the prior art is overcome, full utilization of the fluorine-containing compounds is achieved, and meanwhile the waste fluorine-containing compounds can be processed into high-value calcium fluoride, potassium hydroxide and silicon dioxide.

The invention discloses an air filtration material filtering efficiency testing device, wherein the testing device includes a gas inlet chamber and a gas testing chamber; the gas inlet chamber is provided with a gas inlet, the gas testing chamber is provided with a gas outlet and a test port, an air filtration material and a draught fan are arranged between the gas inlet chamber and the gas testing chamber. The area of the gas inlet is greater than the area of the gas outlet. The gas inlet chamber is in a negative pressure state, and the gas testing chamber is in a positive pressure state. The air filtration material is located at an inlet or an outlet of the draught fan. The gas testing chamber is provided with a curved surface, and the test port is formed in the middle of the curved surface. The air filtration material is a single-layer, composite or pleated composite-structural material. The testing device has the beneficial effects that the structure design is concise, and a test result can be intuitively and quickly observed; no airflow blind corner exists, the uniformity of the quality of tested air can be ensured; and the gas testing chamber is still in the positive pressure state, the requirement on chamber leakproofness can be reduced, the gas turbulence is reduced, and mass production is easy to achieve.

A sand-filled expansion anchor rod comprises expansion windowing faces and a hollow anchor rod body. The hollow anchor rod body is composed of multiple sections of anchor rod main bodies; each sectionof anchor rod main body is provided with the two corresponding expansion windowing faces, wherein the upper edges of the expansion windowing faces are hinged to the lower edge of the anchor rod mainbody through hinges; a first lug plate is arranged between the expansion windowing faces at the lower edge of the anchor rod main body located at the topmost end; second lug plates are arranged at theupper edge of the anchor rod main body located at the middle section, and another first lug plate is arranged between the expansion windowing faces at the lower edge of the anchor rod main body located at the middle section; another second lug plates are arranged at the upper edge of the anchor rod main body located at the bottom end; the anchor rod main bodies are in hinged connection through the first lug plates and the second lug plates; and an anchor hole plugging piece is further arranged on the outer wall of the hollow anchor rod body, and connecting tubes are arranged on the top face of the anchor hole plugging piece and connected to a hoop on the outer wall of the hollow anchor rod body in a sleeving mode and can rotate around the hoop. By adopting the structure, it is ensured that the anchor rod is closely attached to an anchor hole, and the good support effect can be also achieved even for the anchor hole with a certain curvature.

A wireless multi-channel shipboard water quality sampling system based on an unmanned ship. It transmits signals in the airtight sampling chamber through wireless communication, so as to avoid unnecessary damage to the circuit of the unmanned ship due to the leakage of sampling liquid during the sampling process. At the same time, the communication protocol is integrated and simplified, and the execution module is integrated. The design of the peristaltic pump is adopted, which makes the whole system have the advantages of simple principle, easy operation, low requirements on the airtightness of the container, long life, low requirements on the installation of unmanned ships or manned ships, and strong compatibility. In addition, many expansion positions are reserved on the sampling pipeline, which can be expanded within the maximum collection capacity to meet the user's demand for sample collection capacity.

The invention relates to a nuclear power plant buried hydrogen pipeline leakage monitoring system and method. The system comprises a sleeve, hydrogen concentration probes and a control unit. A hydrogen pipeline is arranged in the sleeve, the sleeve and the hydrogen pipeline form a closed space, vertical pipes are arranged on the sleeve and arranged at the two ends of the sleeve, and the hydrogen concentration probes are arranged at the upper ends of the vertical pipes and connected with the control unit. The method comprises the steps of acquiring the time difference of trigger alarms of the two hydrogen concentration probes; acquiring the gas flow rates detected by two gas flow rate sensors; preliminary positioning a leakage point, and determining a leakage section; and positioning the leakage point. The nuclear power plant buried hydrogen pipeline leakage monitoring system and method have the advantages that the leakage point can be accurately positioned, the requirement for the leakproofness of the glass fiber reinforced plastic sleeve is not high, and even though the glass fiber reinforced plastic sleeve is broken, monitoring of hydrogen pipeline leakage is not affected; and no fear that water enters the glass fiber reinforced plastic sleeve exists, a series of facilities such as a hydrogen sampling pipeline and a sampling pump are reduced, faults of an analysis instrument are dispersed to all measuring point instruments, and the reliability is improved.

The invention discloses a locking type charging adapter assembly for charging a floor mopping robot. The locking type charging adapter assembly comprises an adapter for connecting with a floor moppingrobot and an adapter base for connecting with a socket. An insertion hole for the insertion of a charging head on the floor mopping robot is arranged at one end of the adapter. The insertion hole isprovided with a conducting piece therein. A locking hole is arranged in the side wall of the adapter. An electric connecting contact connected with the conducting piece is arranged in the locking hole. Electric connecting pieces for inserting into a socket are arranged at one end of the adapter base. A docking hole for the insertion of the adapter is arranged at one end, away from the electric connecting pieces, of the adapter base. A hole passage is arranged on the side wall of the docking hole. A locking body capable of telescopic actions towards the direction of the docking hole is arrangedin the hole passage. The locking body is made of conductive materials and connected with the electric connecting pieces, and when one end, away from the insertion hole, of the adapter abuts against the bottom wall of the docking hole, the locking body is inserted into the locking hole to be in contact with the electric connecting contact. The locking type charging adapter assembly of the structure has a simple and compact structure and can ensure high charging stability of the floor mopping robot.

The invention relates to the technical field of immersed tube tunnel construction methods, in particular to an immersed tube tunnel push-out type final joint crimping method. The method comprises thefollowing steps that a second prefabricated section is transported to the position above a preset position in butt joint with a first prefabricated section in a floating mode on a construction site, and a final joint part is arranged in the end, facing the first prefabricated section, of the second prefabricated section in a sleeved mode; the second prefabricated section is sunk to a preset position, end sealing doors are packaged at the adjacent positions in the final joint part and the second prefabricated section correspondingly, a gap is reserved between the two end sealing doors, and in the sinking process of the second prefabricated section, the water pressure in the gap and the water pressure outside the second prefabricated section are driven to be dynamically balanced; and water is injected into the gap to drive the final joint part to be pushed out towards the first prefabricated section by utilizing the water pressure in the gap until the final joint part extends out of thesecond prefabricated section and is in butt joint with the first prefabricated section, so that a push-out type final joint is constructed. The method is used for overcoming the defects that in the prior art, an equipment system is complex and the installation control technology is difficult.

The invention relates to the technical field of energy storage, and provides an open type heat pump power storage system and method. A cold and heat energy heat engine power generation loop; the heat pump refrigerating and heating loop further comprises an air discharging structure suitable for discharging redundant air in the heating loop into the external environment when the heat pump refrigerating and heating loop conducts heating so as to reduce the air pressure in the heating loop. Wherein the heat pump refrigerating and heating loop adopts air as a flowing working medium for heat exchange. According to the open type heat pump electricity storage system, air is adopted as a flowing working medium for heat transfer, and compared with the mode that argon, helium and the like are adopted as the flowing working medium, the cost is lower. Moreover, as the flowing working medium is air, the air quality and pressure in the system can be directly adjusted through the deflation structure communicated with the external environment, a buffer tank is omitted, meanwhile, the requirement of the whole system for leakproofness is lowered, the feasibility of the technology is improved, and the research and development difficulty is lowered.