111results about How to "Work effectively for a long time" patented technology

The invention which relates to an automatic constant temperature type photoacoustic detection device for SF6 decomposed components and an experiment method thereof belongs to the technical field of SF6 gas insulation device partial discharge online monitoring. The device is characterized in that an automatic constant temperature system is arranged in present infrared photoacoustic spectrum monitoring systems; and according to the method, the device is utilized to detect the SF6 gas partial discharge decomposed components in a GIS (gas insulated substation) simulation element under automatic preset temperature constancy conditions. According to the invention, the influence of external environment can be eliminated, the gas components of SO2, CO2, CF4, SO2F2, SOF2 and the like with the concentrations of low to 0.01muL/L can be effectively detected, the accuracy, the detection precision and the stability are high, and performances of a solid state relay are stable, so the long-term effective working of the automatic constant temperature system can be guaranteed. The device which can be widely applied to the field of the SF6 gas insulation equipment partial discharge online monitoring is especially suitable for detecting the SF6 gas partial discharge decomposed components in the GIS.

The invention provides a carbon tetrachloride polluted water source treatment device and application thereof. The device comprises a water inlet tank, a simulated soil layer tank and a water outlet tank, wherein the water inlet tank is connected with the simulated soil layer tank through a left partition; the simulated soil layer tank is connected with the water outlet tank through a right partition; the lower part of the left partition is provided with an influent water guide tube set; the influent water guide tube set is communicated between the simulated soil layer tank and the water outlet tank; and the inner side of the bottom of the simulated soil layer tank is vertically provided with a reaction well casing set. The treatment device provided by the invention can effectively remove the carbon tetrachloride pollutant in the water body, and can not generate secondary pollution.

The invention relates to a bionic gradient super-hydrophobic structure design method based on the Marangoni effect, and belongs to the technical field of micro-nano structure functional surface designand preparation. The method includes: single surface array structure is firstly constructed according to the characteristics of the hydrophobic surface structure, and the contact angle of the surfacestructure is calculated in combination with a Wenzel and Cassie model; different single array structures with the same parameters are constructed, the contact angles of all the structure models are compared, a structure sequence is constructed according to the contact angles, the structure parameters are finely adjusted, and then the structure sequence is constructed to form a continuous gradientcomposite array structure; a nanometer heating sheet is installed on a single structure, different temperature values are set to form a temperature gradient, and under the coupling of the structure gradient and the temperature gradient, due to the change of surface tension, liquid drops spontaneously move from a surface with a large contact angle to a surface with a small contact angle. Therefore, the surface tension difference caused by the Marangoni effect promotes directional movement and automatic rolling of the liquid drops, so that the self-cleaning characteristic is realized.

The invention relates to a novel cervical vertebra dynamic internal fixing device, which comprises an artificial cervical vertebra body and an artificial intervertebral disc. The artificial cervical vertebra body is inlaid on any vertebral body of the third section to the seventh section of partially cut human cervical vertebra. Two screw holes and two clamping grooves are symmetrically arranged on the artificial cervical vertebra body. A vertebral pedicle screw which is fixedly connected with the section of the human cervical vertebra body and a vertebral pedicle is arranged in each screw hole in a penetrating way. A vertebral pedicle screw lock pin cross bar is positioned and clamped between the two clamping grooves. The artificial intervertebral disc is arranged at the upper end and the lower end of the artificial cervical vertebra body, is arranged at a vertebral gap between an upper vertebral body and a lower vertebral body close to the position of the artificial cervical vertebra body, and comprises artificial nucleus pulposus and an artificial end plate. A screw hole is arranged on the artificial end plate. An artificial end plate fixing screw which is fixedly connected with the corresponding section of the artificial cervical vertebra body is arranged in the screw hole in a penetrating way. By adopting the internal fixing device, the invention has the advantages that the surgical invasion is small, the operation is easy and the dynamic fixation of the cervical vertebra after the subtotal excision of an anterior cervical single vertebral body can be realized.

The invention relates to an anti-oxidation high-pressure sealing stuffing box assembly, in particular to a stuffing box assembly for valves, which is especially suitable for industrial fluids and gases in high-pressure conditions. The anti-oxidation high-pressure sealing stuffing box assembly is characterized by comprising a sealing main body and a compensation mechanism; wherein the sealing main body is sequentially laminated with a first threadlike stuffing, a first zinc sheet, a first sheet stuffing, a second zinc sheet, a second sheet stuffing, a second threadlike stuffing and a spacer from bottom; the spacer is also sequentially laminated with a third threadlike stuffing, a third zinc sheet, a third sheet stuffing, a fourth zinc sheet, a fourth sheet stuffing and a fourth threadlike stuffing, wherein a stuffing gland bush is arranged above the fourth threadlike stuffing; a dish-shaped spring is arranged above the stuffing gland bush; and a gland bush flange is arranged above the dish-shaped flange. The invention has the advantages of excellent sealing effect, reliable comprehensive sealing performance, capability of working for long time, good self-wetting performance and wide application for transporting various gases and liquids.

The invention belongs to the technical field of gas sensors, and relates to a gas sensor based on a metal molybdate nanocomposite and a preparation method thereof. An annular gold electrode of the sensor is coated with a metal molybdate nanocomposite film; the specific preparation process of the metal molybdate nano composite material comprises the following steps: firstly, preparing MoS2 powder from ammonium molybdate, thiourea, ammonium fluoride and the like according to a hydrothermal synthesis method, and meanwhile, preparing a semiconductor metal oxide suspension from semiconductor metalsalt through the hydrothermal synthesis method; carrying out hydrothermal synthesis on the molybdenum sulfide powder and the semiconductor metal oxide suspension liquid to obtain a molybdenum sulfidenano composite material precursor, and calcining the prepared molybdenum sulfide nano composite material precursor in an atmosphere to obtain a metal molybdate nano composite material. The ethanol gassensor has the advantages of high selectivity, high sensitivity, good stability, long service life, short response time and recovery time to ethanol gas, excellent performance, and rapid and timely ethanol gas alarm.

The invention discloses a lightning arrester, which comprises a body, a separator, a grounding wire terminal, a high-voltage connecting terminal, an insulating layer, an insulated bracket, a mounting hole, a bolt and nut assembly and second valve plates; the high-voltage connecting terminal is connected to one end of the body; the separator is connected to the other end of the body; the other end of the separator is connected with the grounding wire terminal; the body, the separator, the grounding wire terminal and the high-voltage connecting terminal are wrapped by the insulating layer, and first valve plates are formed at intervals on the insulating layer on the body; one end of the insulated bracket is arranged on the body, and the other end of the insulated bracket is provided with the mounting hole; the bolt and nut assembly is arranged in the mounting hole; and the second valve plates are arranged on the insulated bracket at intervals. The lightning arrester has the advantages of simple structure, small volume, light weight, convenience and simplicity in installation due to the mounting bracket and low installation cost, and can effectively work for a long term under severe environments of acid, alkali, dust, salt mist, moisture and the like.

The invention provides a solid scale inhibitor feeding device, and relates to the field of feeding of solid scale inhibitors. The solid scale inhibitor feeding device comprises an upper end cover, a sealing ring, a hollow solid scale inhibitor, a medicine storage circulator and a lower cup body, wherein the diameter of an inner circle of the upper end cover is the same as the diameter of an outer circle of the lower cup body, and the outer circle of the lower cup body is connected with the inner circle of the upper end cover by threads. The solid scale inhibitor feeding device is characterized in that a plurality of through holes are formed in the upper end cover, the diameter of the outer circle of the sealing ring is the same as the diameter of the outer circle of the lower cup body, the sealing ring is arranged between the upper end cover and the lower cup body, and the upper end cover and the lower cup body are tightly connected to seal the whole device; the hollow solid scale inhibitor is of a spherical hollow structure; the medicine storage circulator comprises a medicine storage bracket and a circulating bottom plate; the medicine storage bracket is in a hollow cylindrical pipe shape, and is matched with the hollow structure of the hollow solid scale inhibitor; a plurality of holes are formed in the circulating bottom plate, and are connected with the medicine storage bracket for fixing; a boss is arranged at the bottom end of the lower cup body, and is just matched with the circulating bottom plate.

The invention provides a capacitance Si-based radiation detecting device, and a preparation method thereof. The detecting device comprises an Si substrate layer, wherein a buried oxide layer is set above the Si substrate layer; a metal fill area, a gate dielectric area, a Si thin layer, an ohmic contact injection area and an oxide isolation layer are set on the buried oxide layer from the center to the periphery; an ohmic contact area is set above the ohmic contact injection area; a gate metal electrode is set above the metal fill area. The detector has the advantages of high radiation sensitivity and induced charge capacity, low work gate voltage and high reliability. The method comprises the steps of growing the oxide isolation layer on a substrate; forming the ohmic contact injection area by doping light and heavy ions; forming the ohmic contact area via sputter deposition; forming a groove area via etching; forming the gate dielectric area via an atomic layer deposition process; forming a metal fill groove area via secondary etching; forming the metal fill area and the gate metal electrode via the Cu interconnection process. The method has the advantages of simpleness in process, good repeatability, low cost and easiness in integration with the fabrication process of the existing large-scale integrated circuit.

The present invention discloses a two-stage type entrained flow gasification furnace. In the prior art, under the working condition of dry coal powder entrained flow gasification, the gasification furnace with characteristics of cleaning, long service life, high concern conversion rate and high gasification reaction intensity is required to be developed. The two-stage type entrained flow gasification furnace is characterized in that the outlet of the pre-gasification chamber is obliquely inserted into the main gasification chamber, a ratio of the height from the center of the pre-gasification chamber outlet to the main gasification chamber bottom portion to the diameter of the main gasification chamber is 0.3-2:1, the included angle alpha formed by the axial line of the pre-gasification chamber and the axial line of the main gasification chamber in the vertical cross-section is 30-90 DEG, the included angle beta formed by the axial line of the pre-gasification chamber and the tangent line of the main gasification chamber in the horizontal cross-section is 30-90 DEG, the top portion of the pre-gasification chamber is provided with a coal gasification burner, and the main gasification chamber is provided with a gasification agent spraying nozzle. According to the present invention, the service life of the furnace lining is prolonged, the waste of the fuel due to the falling of the coal powder into the slag pool through the slag discharge port is reduced, and the two-stage type entrained flow gasification furnace is suitable for the occasions using the coal powder to prepare the industrial fuel gas.

The invention discloses a resistance plate. The resistance plate comprises an insulated substrate, a conductor layer and a resistor layer, wherein the conductor layer and the resistor layer are arranged on the insulated substrate respectively; the conductor layer and the resistor layer are partially overlaid, the resistor layer is covered on the partial surface of the conductor layer in an overlapped area of the conductor layer and the resistor layer, a moisture-proof layer and a resin protective layer are sequentially formed on the resistor layer, and an anti-corrosion wearing layer is formed on the conductor layer in an area where the conductor layer is not overlapped with the resistor layer. According to the resistance plate, the moisture-proof layer and the resin protective layer dual-layer protection process is adopted to improve the moisture resistance and the corrosion resistance of the resistor layer, the corrosion resistance and the durability of the conductor layer are improved through the anti-corrosion wearing layer, so that the resistance plate can effectively work in a complex working environment for a long time when being applied to a fuel quantity sensor, and has good durability. The invention also discloses a preparation method of the resistance plate.

The invention belongs to the technical field of sewage treatment, and discloses lung-simulated treatment equipment for polyvinyl chloride plastic regeneration cleaning sewage. The lung-simulated treatment equipment for the polyvinyl chloride plastic regeneration cleaning sewage comprises a water tank, support legs are installed at the bottom of the water tank, guide grooves are formed in the leftand right side walls in the water tank, guide blocks are slidingly connected into the two guide grooves, the bottom wall of the water tank is fixedly communicated with the water inlet end of a water outlet pipe, and a water valve is fixedly installed at the water outlet end of the water outlet pipe. According to the lung-simulated treatment equipment for the polyvinyl chloride plastic regenerationcleaning sewage, through the arrangement of lung-type purification mechanisms, the principle of lung breathing is simulated, and the sewage is quickly pumped and discharged; different from traditional filtering structures, the lung-type purification mechanisms can quickly collect polyvinyl chloride plastic particles after filtering the sewage, and the sewage is quickly collected; through the arrangement of sewage discharge pipes and sewage discharge linkage mechanisms, the sewage discharge of the lung-type purification mechanisms is facilitated, and the working efficiency of the equipment isimproved.

The invention relates to an open hole well packer, a rubber tube is sheathed outside an upper inner tube, an upper joint, the upper inner tube, a combined valve body, a lower inner tube and a lower joint are sequentially connected, the lower part of an upper rubber tube sheath covers the upper part of the rubber tube, the upper part of the upper rubber tube sheath is sheathed outside the upper joint, the upper part of a lower rubber tube sheath covers the lower part of the rubber tube, the upper part of a sealing sleeve is connected with the lower part of the lower rubber tube sheath, the lower part of the sealing sleeve is sheathed outside the combined valve body, an upper piston and a lower piston are mounted between the sealing sleeve and the lower inner tube, preset solution is perfused above the upper piston, the lower piston is arranged below the upper piston, a communicating hole is arranged on the upper piston, the communicating hole is positioned between the upper piston and the lower piston, a vertical pore canal is arranged on the combined valve body, a one-way valve is mounted at the upper part of the vertical pore canal, the one-way valve is designed for enabling the rubber tube to be in expansion state permanently, the rubber tube is expanded by the preset solution, and the one-way valve can not be corroded and damaged, so that the rubber tube can work effectively for a long time and meet the requirement on permanent blocking of the well bottom of an open hole well in an oilfield.

The invention relates to the technical field of pipe fitting joints, in particular to a pressure reminding four-way pipe joint which comprises a pressure reminding unit and a filtering unit, and the pressure reminding unit comprises a pressure key, a sliding block, a reminding flag, a spring, a pushing rod and other components. The filtering unit comprises a filtering rod, a rectangular baffle, a collecting pool and the like. According to the pressure reminding four-way pipe joint, a first-stage spring and the pressure key are arranged to extrude the pressure key when the water pressure is too large, so that the pushing rod can move rightwards, an extrusion block is arranged to extrude an arc-shaped block to move upwards or a moving block to move rightwards, and a sliding groove and the sliding block are arranged to be used for positioning, so that a moving block is prevented from being extruded out of a rectangular channel. The filter unit is arranged for filtering and discharging impurities and waste materials in sewage, so that the problems that when water is introduced into a traditional four-way pipe joint, the pressure is large, so that a pipeline falls off easily and even explodes are solved, and meanwhile, the problem that the traditional four-way pipe joint cannot work normally due to the fact that the traditional four-way pipe joint is blocked easily is solved.

The invention discloses an intelligent trash bin for a residential community, and belongs to the technical field of trash bins. The intelligent trash bin comprises a barrel body and a barrel cover, and the barrel body is connected with the barrel cover through a connecting piece to realize opening and closing. A photovoltaic panel is arranged on the barrel cover, a central core unit is arranged inthe barrel body, and the core control unit is correspondingly connected with a plurality of pressure sensing units. The core control unit is correspondingly connected with a motor, a radio frequencycard reading element, a color camera lens, an infrared intelligent unit, a storage battery and an indicator unit. The intelligent trash bin has a plurality of different working ways of trash colletingand recycling, and has the working power endurance ability to work efficiently for a long time, and has great application prospects in trash classification and recycling.

The invention relates to a preparation method for an acid resistance soil grounding grid material, and belongs to the technical field of metal materials. Aluminum is used as a basis material, and a plurality of elements are added in an aluminum substrate to prepare an alloy wire suitable for a grounding grid, and therefore stable corrosion products of aluminum-copper alloy are formed on the surface, contact resistance with the soil is reduced, and excellent corrosion resistance and grounding electrical performance are achieved simultaneously. Trace rare earth elements can be added meanwhile toachieve grain refinement, and therefore the aim of further improving the corrosion resisting performance is achieved. A graphite layer with high corrosion resistance is arranged on the surface of thealloy wire in a wrapping mode to improve strength and conductivity of the grounding material. The alloy wire is used as a reinforcing material to improve tensile strength of the grounding material, and therefore flexible grounding material can be manufactured. The grounding material is excellent is performance, can greatly reduce the cost of grounding body replacement caused by grounding grid corrosion in the electric power system, can avoid grid tripping caused by grounding grid failure, and has better market prospects.

The invention relates to a circuit device and a circuit-board protecting box thereof, wherein the circuit device comprises the circuit-board protecting box, a circuit board, casting glue and a fastener; and the circuit-board protecting box comprises a box body. The box body is in the shape of a shell with an upward opening and comprises a bottom board and lateral boards which are connected to the circumferential edge of the bottom board from the top. Installing seats are arranged on the bottom board. The box body is made of transparent plastics. The size of a board body of the circuit board corresponds to that of the bottom board of the box body, and corresponding through holes are arranged in the board body of the circuit board. The circuit board is sleeved on one corresponding installing seat of the box body through the through hole, a bottom glue-pouring space is formed between the lower end surface of the circuit board and the bottom board of the box body, and a gap respectively exists between each part on the circumferential edge of the circuit board and each lateral board of the box body. The whole glue-pouring space is filled with the casting glue, and the circuit board and electronic devices and components welded on the circuit board are covered with the casting glue. Installing holes are arranged in the installing seat of the box body. The protecting effect of the circuit-board protecting box for the circuit board is better.