104results about How to "Consistent air pressure" patented technology

The present invention discloses a ball valve airtightness test method and test system. According to the test method, an external leakage test and an internal leakage test are performed separately. The system comprises an air source, an inflation valve and an exhaust valve; the inflation valve and the exhaust valve are arranged at two sides of a tested ball valve respectively; a conducting valve is in spanning connection with the two sides of the tested ball valve; one outlet of the inflation valve is connected with a standard cavity; a high-pressure end switching valve is arranged between the inflation valve and the standard cavity; one outlet of the standard cavity is connected with the high-pressure end of a differential pressure sensor; and the low-pressure end of the differential pressure sensor is connected with one side of the tested ball valve through a low-pressure end switching valve, wherein the one side of the tested ball valve is adjacent to the exhaust valve. The test system of the invention has the advantages of simple structure, low cost and high precision of the inner leakage test of the ball valve.

The invention provides an oil pumping unit, which comprises a first tank with a first opening, a second tank with a second opening and an oil drain port, and a reversing valve. The reversing valve comprises a first gas port in communication with the first opening, a second gas port in communication with the second opening, and a third gas port in communication with an external gas source. When no external gas source is connected with the third gas port, the first gas port and the second gas port are kept in communication with each other. When the external gas source is connected with the third gas port, the third gas port and the second gas port are kept in communication with each other. By means of the oil pumping unit, when the oil in the second tank needs to be discharged, the third gas port and the second gas port are switched to be in communication with each other. In this way, the gas of the external gas source is filled into the second tank, and then the oil in the second tank is discharged to the outside via the oil drain port. As a result, the oil discharge is completed.

The invention relates to a water seepage structure and method. The water seepage structure comprises a water seepage well and a water permeation layer, wherein the water seepage well is vertically arranged in a soil layer of the ground; the water seepage well is filled with a flow guide object; the water seepage well infiltrates received water into an underground water layer through the flow guide object; the water permeation layer is arranged on the soil layer and covers a well mouth of the water seepage well; and the water permeation layer directly infiltrates surface water into the soil layer or guides the surface water into the water seepage well. The water seepage well is arranged on the ground, so that water in a ground surface layer can be quickly infiltrated into the underground water layer to quickly recover the underground water level, the cost is low, and the efficiency is high; the water seepage well is filled with the flow guide object, so that the seepage velocity of the water can be increased by utilizing a capillary tube principle; and the water permeation layer is arranged on the surface layer of the water seepage well, so that accumulated water can be prevented from being generated on the surface of the soil layer between water seepage wells.

The invention discloses an efficient lightweight speed reducer for a tower crane. The speed reducer comprises a whole box body, an input shaft, a transmission assembly and an output shaft, wherein theinput shaft, the transmission assembly and the output shaft are sequentially engaged for transmission, the end, extending out of the box body, of the output shaft is of a spline structure, a first convex stop opening is preset on a cover plate of the output shaft and is matched with a first concave stop opening of a winding cylinder spline sleeve, and a second convex stop opening is preset on anouter circle shaft of the end, extending out of the box body, of the output shaft, and is matched with a second concave stop opening of the winding cylinder spline sleeve; an oil tank is formed in thebox body, the inner wall of the oil tank forms a first oil collection groove and a first oil way, the first oil way passes through the transmission assembly and / or a bearing of the output shaft, oneend of the first oil way communicates with the first oil collection groove, the other end of the first oil way communicates with an oil tank inner cavity, the box body is connected with a high-speed end bearing pedestal, a second oil collection groove and a second oil way are formed on the high-speed end bearing pedestal, the second oil way passes through an inner cavity of the high-speed end bearing pedestal, one end of the second oil way communicates with the second oil collection groove, and the other end of the second oil way communicates with the oil tank inner cavity.

The invention discloses a snow accumulation prevention device for an ecological agriculture planting greenhouse. The device comprises a vertical supporting rod, the upper portion of a transverse supporting rod is fixedly connected with a light windpipe, the light windpipe is fixedly communicated with an elastic air bag, the elastic air bag comprises an inner cylinder and an air bag cover, the surface of the inner cylinder is provided with air vents, two ends of the inner cylinder are respectively and fixedly connected with connectors, two ends of the air bag cover are respectively in sealing sleeved connection to the connectors, one end of the light windpipe is communicated with an inflator pump through a gas filled tube, the other end of the light windpipe is communicated with a sucking pump through a suction pipe, the gas filled tube is provided with a first solenoid valve, and the suction pipe is provided with a second solenoid valve. The snow accumulation prevention device for theecological agriculture planting greenhouse has the advantages that the elastic air bag can be internally inflated and deflated in heavy snow weather, the purpose of flapping and jacking up plastic film of a plastic greenhouse is achieved, the greenhouse is prevented from being collapsed due to the fact that snow accumulation on the upper portion of the greenhouse is excessive, through the cycle work of the sucking pump and inflator pump, manual interference is not needed, and a lot of manpower is reduced.

The invention discloses a gas regulation type deoxidation preservative which comprises fructose, ascorbic acid, sodium ascorbate, sodium bicarbonate, sodium carbonate, activated carbon, a carbon dioxide release regulator, a dispersant and water. The gas regulation type deoxidation preservative can absorb oxygen while releasing carbon dioxide, regulates the amount of carbon dioxide through the carbon dioxide release regulator, maintains the balance of the total volume of oxygen and carbon dioxide in a container bottle, ensures the consistency of pressures inside and outside the container, is high in practicability, meets the production and living needs, is wide in use, and has stronger promotion significance.

The invention discloses an air disinfection effect pipeline evaluating system, which is characterized by comprising microorganism aerosol generating equipment, an airtight cabinet, two samplers and an air pump, wherein a main machine of the microorganism aerosol generator is arranged outside the airtight cabinet; an atomizing cup containing a microorganism solution is kept in the airtight cabinet; the main machine of the microorganism aerosol generator is connected to the atomizing cup through a soft hose; the air pump of one of the samplers is pre-arranged in the airtight cabinet, and a sampling head is kept outside the airtight cabinet, and an inlet and an outlet of the sampling head of the sampler are independently communicated with the airtight cabinet, thus forming a closed loop; an air purifier is arranged outside the airtight cabinet, and an air inlet of the air purifier is communicated with the airtight cabinet while an air outlet of the air purifier is connected to an inlet of the other sampler; an outlet of the other sampler is connected into the airtight cabinet to form a closed loop; an air filter is arranged on the airtight cabinet. The evaluating system disclosed by the invention can effectively evaluate a transient disinfection effect of the air purifier on the aerosol microorganism therein, and simultaneously solve a problem on biological safety in a microorganism aerosol experiment.

The invention belongs to the field of medical device, and particularly relates to a tracheal catheter with an adjustable inner diameter. The tracheal catheter comprises a patient insertion end and catheter body, the patient insertion end is formed by orderly splicing and fixing multiple catheter pieces and an airbag, and the size of the inner diameter of the patient insertion end can be adjusted by inflating or exhausting through the airbag. Therefore, the tracheal catheter with the adjustable inner diameter is adopted, the inner diameter of the patient insertion end in the tracheal catheter can be adjusted according to the condition of the patient, the time for selecting the model of the tracheal catheter by medical personnel is greatly shortened, the difficulty of intubation is reduced,and the supply of oxygen and the smooth removal of airway secretions are guaranteed.

The invention discloses self-balancing hollow glass. The self-balancing hollow glass comprises hollow glass body filled with an inert gas and a sealing body sealed at the periphery of the hollow glass body, wherein the sealing body comprises a spacer frame supported between two layers of glass; the spacer frame sinks toward the interior of the hollow glass body to form an accommodating cavity; an air pipe is arranged on the spacer frame and connected with an air bag communicated with the hollow glass body in a sealing manner through a detachable snap ring; a protective sleeve of which the elastic coefficient is smaller than that of the air bag is arranged outside the air bag; the deformation limit of the protective sleeve is smaller than the volume of the accommodating cavity. The self-balancing hollow glass has the following benefits: air in the air bag can be balanced by variation of the internal pressure intensity of the hollow glass, and the air pressure in the hollow glass can be kept consistent with the outside environment at any time, so that the hollow glass can be protected from deformation and the integrity of the sealing body is guaranteed.

The invention discloses a vacuum preloading underground water level measurement device which comprises a water level pipe, a forward and backward rotation motor, a water level probe and a recording apparatus. The water level pipe is embedded in a soil body. A coil pulley is arranged at the lower portion of the forward and backward rotation motor and connected with a rotating shaft of the forward and backward rotation motor. Wires of control circuits are wound around the coil pulley. The recording apparatus is arranged on the coil pulley. The lower portions of the wires of the control circuits are connected with the water level probe. Two pairs of electrical connecting points are arranged on the water level probe and connected with the two control circuits. The invention further discloses a vacuum preloading underground water level measurement method. The elevation between the coil pulley and the ground is measured, the changes of the wires, namely, the changes of the height of the probe, are measured through the recording apparatus, and therefore the underground water level elevation can be indirectly obtained. The vacuum preloading underground water level measurement device is isolated from the atmosphere, it is ensured that the water level and air pressure of soil bodies in and around the water level pipe are consistent, and meanwhile the underground water level height is automatically measured so that errors can be reduced as mush as possible.

The invention discloses a high-performance electronic cigarette atomizer, which comprises an atomizer shell and a cigarette holder, an oil storage groove is formed in the atomizer shell, a smoke channel is formed in the oil storage groove, a filtering groove is formed in the upper end of the smoke channel, and a filtering plate is arranged at the upper end of the filtering groove; the cigarette holder is arranged at the upper end of the filtering plate, an anti-seepage ball is arranged below the filtering groove, anti-seepage cotton is arranged below the anti-seepage ball, an oil outlet pipe is arranged below the oil storage tank, an oil leakage film is arranged in the oil outlet pipe, and oil leakage holes are formed in the oil leakage film; and micro fans are arranged on the left side and the right side of the oil outlet pipe. According to the high-performance electronic cigarette atomizer, redundant tobacco tar can be adsorbed through the arranged impermeable cotton, the situation that the tobacco tar enters the oral cavity of a user by mistake is avoided, meanwhile, the adhesion degree between the atomizer shell and an electronic cigarette can be improved through the attraction magnet, and the atomizer shell is prevented from falling off.

The invention relates to the field of electrolytic solution impregnation devices, in particular to a central vacuumizing impregnation system and a control method thereof. The control method comprises a central control system and a plurality of impregnation machines, wherein the central control system comprises a vacuum air reservoir, a vacuum machine, an electric control cabinet and a vacuum monitor. The vacuum monitor is arranged on the vacuum air reservoir and can monitor air pressure of the vacuum air reservoir, the impregnation machines are communicated with the vacuum air reservoir respectively and separately through pipelines, and valves are respectively arranged on the pipelines between the impregnation machines and the vacuum air reservoir. An air pumping end of the vacuum machine is connected with the vacuum air reservoir through a pipeline, a first control valve is arranged on the pipeline between the vacuum air reservoir and the air pumping end of the vacuum machine, and the electric control cabinet is electrically and respectively connected with the first control valve, the valves and the vacuum monitor. The central vacuumizing impregnation system can prevent vacuumizing procedures of the impregnation machines from excessively depending on manual operation, production efficiency is increased effectively, and quality uniformity of volume-produced capacitor core packages is improved effectively.

The invention provides an automatic electrolyte supplementing assembly and a storage battery pack electrolyte supplementing device, and relates to the technical field of automatic storage battery electrolyte supplementing devices. The automatic electrolyte supplementing assembly comprises an outer cover, a drip pot, a baffle member and a float; the drip pot, the baffle member and the float are arranged in the outer cover from top to bottom, and the sidewall of the outer cover is provided with meshes; the drip pot comprises a electrolyte inlet and a electrolyte outlet, the electrolyte inlet communicates with a electrolyte supplementing tube, and the electrolyte outlet is arranged corresponding to the baffle member; and the upper end of the float is arranged corresponding to the baffle member, and the lower end of the float stretches out of the bottom of the outer cover. The storage battery pack electrolyte supplementing device comprises the automatic electrolyte supplementing assemblies, a electrolyte supplementing pot, the electrolyte supplementing tube, a throttle tube and a storage battery pack; the automatic electrolyte supplementing assemblies are arranged in positions close to the opening of the storage battery pack; two ends of the electrolyte supplementing tube respectively communicate with the electrolyte supplementing pot and the drip pot; and the electrolyte supplementing tube is provided with the throttle tube. The device is convenient for timely supplementing a electrolyte to the storage battery pack to alleviate the electrolyte leakage problem, and reduces the influences of impurities on the electrolyte.

The invention relates to an air filtering composite heat insulating and light adjusting window. The air filtering composite heat insulating and light adjusting window comprises a composite heat insulating profile window frame, a window type air filtering valve and hollow light adjusting glass. The composite heat insulating profile window frame comprises profile transverse frames, profile vertical frames and profile middle columns. The window type air filtering valve comprises a filtering valve frame body, an alloy magnetic conductive air curtain supporting net, a filtering core, electromagnets, permanent magnets, a wind preventing curtain and a wind preventing curtain unwinding mechanism. The hollow light adjusting glass comprises pieces of tempered glass, a multistage light adjusting film and a multistage light adjusting film sealing and tensioning mechanism. According to the air filtering composite heat insulating and light adjusting window, air entering into a room from the outside of the room is filtered, and indoor and outdoor air convection and filtering are achieved; meanwhile, the amount of ultraviolet light, visible light and near-infrared light of sunlight shining into the room and the ratio of the ultraviolet light to the visible light to the near-infrared light of sunlight shining into the room are controlled through up-down moving of the multistage light adjusting film, and the situation that optical parameters of the hollow glass are adjustable is achieved; and in addition, the wind pressure resistance, the airtight performance, the watertight performance, the heat preservation performance, the sound insulation performance and the heat insulation performance of a window body of the air filtering composite heat insulating and light adjusting window are higher than national standards.

The invention discloses a compensated drainage floor drain. The compensated drainage floor drain comprises a water tank and a water outlet pipe, wherein the water tank is provided with a front side surface and two side surfaces; the water outlet pipe is arranged on the front side surface; gutters are arranged on two sides of the upper end of the water tank in an extending manner; the compensated drainage floor drain further comprises at least one water storage pipe used for replenishing water for the water tank, arranged on the two side surfaces and communicated with the water tank through narrow water replenishing seams; the ends of the water storage pipes, far away from the water tank, are closed ends; the water storage pipes are positioned right below the gutters, and the closed ends do not extend beyond the end parts of the gutters; when water in the water tank is evaporated and reduced, water in the water storage pipes flows into the water tank through the water replenishing seams. The compensated drainage floor drain has the advantages of low installation height, high drainage speed and long water-sealing stink-proof time.

The present invention discloses a flue gas treatment system for ceramic production. The flue gas treatment system comprises a boiler, a denitration system, a desulfurization system, a heat exchanger,a chimney and a gas source; the boiler, desulfurization system, and chimney are sequentially connected by pipelines; flue gas is desulfurized by the desulfurization system and denitrated by the denitration system; denitration spray heads spray a reducing agent prepared in a reducing agent preparation module into the boiler to remove nitrogen oxides in the flue gas generated by the boiler; the heatexchanger is arranged in a flue inlet heat exchange section and a flue outlet heat exchange section; heat of raw flue gas not subjected to desulfurization by a desulfurization tower is transferred tonet flue gas subjected to the desulfurization by the desulfurization tower via the heat exchanger; liquid water carried by the net flue gas is converted into gaseous water, thereby achieving an effect of eliminating white smoke. The flue gas treatment system organically combines the three purification devices for the denitrification, desulfurization and white smoke elimination together, is simplein structure, low in operation cost and good in desulfurization and denitration effects, and reduces environmental impacts in the ceramic production.

The embodiment of the invention discloses a pressure relief valve protection device in a leakage test process of a transformer. The device comprises a pressure tank arranged between a transformer anda gas tank. The pressure tank transitions gas introduced into the gas tank and then introduces the gas into the transformer, a plurality of protection accessories are installed on the pressure tank, and each protection accessory comprises a safety relief valve, a gas pressure gauge and a three-way connector. The safety pressure release valve is used for pressure release protection of gas pressurein the pressure tank. The gas pressure gauge is used for displaying a pressure value in the pressure tank. The three-way joint is used for connecting the transformer with the pressure tank and keepingthe pressure values in the transformer and the pressure tank consistent. The pressure tank is arranged between the transformer and the air tank to serve as a buffer link and is communicated with thetransformer, the air pressure is kept consistent, pressure relief protection is conducted before the rated pressure is reached in the leakage test process, and misoperation of a transformer pressure relief valve is effectively eradicated.

The invention discloses a handheld electric hair drier comb. The comb comprises a main unit and a comb assembly; the hair comb assembly comprises a hair comb front cover, a hair comb panel, hair combstrips, a hair comb front bushing, a hair comb rear bushing and a hair comb rear cover. Kidney-shaped holes which are longitudinally arranged and air outlet windows which are transversely arranged areformed in the hair comb panel; hair comb teeth on the hair comb strips are in one-to-one correspondence with the kidney-shaped holes which are longitudinally arranged; the outer frame of the comb front cover wraps the comb panel, the comb strips, the comb front bushing, the comb rear bushing and the comb rear cover to be connected into a whole. Arc-shaped air guide pieces for evenly distributingair volume are arranged on the comb front bushing, air guide openings which are consistent in upper air pressure and lower air pressure and correspond to the air outlet windows are formed by the adjacent arc-shaped air guide pieces, and the comb teeth and the corresponding kidney-shaped holes can swing left and right in a whole row. After the structure is adopted, the comb has the advantages of simple and reasonable structure, convenience in operation and use, uniform air outlet, small damage to scalp and hair, high blow-drying speed, good combing effect, safety and reliability in use and thelike.

The invention relates to an experimental device for detecting corn germination rate. The experimental device comprises a transparent box body, a transparent box cover and a water absorption plate; thetransparent box cover is placed at the upper end of the transparent box body; the water absorption plate is horizontally placed inside the transparent box body; the water absorption plate is providedwith a plurality of planting holes; the experimental device further includes a touch panel, a micro pressure sensor and a PLC, and the touch panel is placed in the transparent box body; the micro pressure sensor is placed at the upper end of the transparent box cover; the signal input end of the micro pressure sensor is connected to the control panel through a circuit; the PLC is connected with the signal output end of the micro pressure sensor; the PLC is connected with a display; the experimental device further includes an atomizer which is placed at the upper end of the transparent box cover; the transparent box body is internally provided with a tube body; the mist outlet end of the atomizer is connected with the tube body; and a plurality of mist outlet holes are formed in the lowerend part of the tube body. Compared with the prior art, the germination rate detection process is high in degree of automation, the calculation data are accurate, and the convenience is improved; moreefficient and uniform germination of corn seeds is guaranteed; and the detection speed and accuracy are guaranteed.

The invention relates to a marine air layer resistance-reducing energy-saving device which comprises a ship body. One or more sets of air supply systems are arranged in the ship body. The output end of a single set of air supply system is connected with a ventilation main pipe, the output end of the ventilation main pipe is sequentially connected with multiple stages of pipelines, and an air cavity air conveying pipe is installed in the front of the joint of every two adjacent stages of pipelines in a penetrating mode. Pressure stabilizing cavities are fixedly formed in the ship bottom of theship body and distributed in parallel in the width direction of the ship body, a plurality of downwards-penetrating air spraying heads are arranged on the pressure stabilizing cavities side by side, and air holes are formed in the outer wall of the ship bottom. The air cavity air conveying pipes convey air into the pressure stabilizing cavities through air cavity injection pipes, and the air is output through the air spraying heads and forms an air layer on the outer wall of the ship bottom. Air is injected between the outer surface of the ship body and water to form uniform and stable gas-liquid two-phase flow, so that the navigation resistance of the ship is reduced, and the propulsion efficiency of the ship is improved. A remarkable application effect can be achieved on resistance reduction and speed increase of a high-speed boat and energy conservation and emission reduction of a large transport ship, and construction of a green and low-carbon ship transport system is effectively assisted.

The invention relates to the technical field of valve structures, and particularly discloses a pneumatic sealing combined control valve. The control valve comprises a sealing valve and a stop valve, wherein a feeding port of the sealing valve communicates with a discharging port of the stop valve, a spherical first valve element is arranged in the sealing valve, a partially spherical V-shaped notch-shaped second valve element is arranged in the stop valve, and the control valve further comprises a floating sealing mechanism, a pneumatic mechanism and an executing mechanism. According to the control valve, the stop valve with shearing force is firstly closed to form blocking, then the sealing valve is used for sealing, and finally a floating sealing valve seat abuts against and makes contact with the first valve element in the sealing valve, so that comprehensive sealing is achieved, the sealing valve seat is controlled by the pneumatic mechanism to abut against and get away from the first valve element, in the rotating process of the first valve element, the first valve element does not make contact with the sealing valve seat, abrasion of the sealing valve seat is avoided, and thetechnical problem that valve sealing fails due to abrasion of the sealing valve seat is solved.

The invention relates to a cooking box group, which is characterized by comprising a cooker box body and an accessory box body, wherein a support body is arranged in the cooker box body; the upper part of the support body is provided with a cylindrical groove; the support body is provided with an I-shaped groove; two sides of the I-shaped groove are provided with rectangular grooves; a circular groove is formed in each rectangular groove; one side of a cylindrical groove is provided with a square groove; two sides of the square groove are provided with a circular ring groove for accommodatinga rice cooking radiator and a concave gap for accommodating an oil storage tank; a clapboard is arranged in the accessory box body; a supporting plate is arranged between the clapboard and the inner wall, and other opposite side of the supporting plate is provided with a case body with two openings, and the case body and the clapboard are integrally formed; an object accommodating area is formed by the clapboard, the case body and the inner wall; an object plate is arranged in the accessory box body; the top of the object plate is provided with a groove for accommodating a spoon, a plurality of grooves for accommodating cooking knives, and a vertical groove for accommodating an emergency lamp; and two sides of the object plate are provided with handles. The cooking box group can be widelyapplied to field cooking.

The invention relates to a biological filter deodorization test device, which comprises an odor source and a pressure difference gas pipeline communicated with the odor source. The test device is characterized in that: the gas pipeline is provided with a filter test device with a plurality of parallel test columns, and the output passage of the filter test device is provided with a gas chromatogram interface for a gas tester acquisition probe and a chromatographic instrument. The test device has wide application range, and can be used for deodorization test of livestock and poultry farms, deodorization test of sewage treatment or garbage disposal plants, screening test of active filter materials and performance test and running effect test of deodorization equipment.

The invention relates to a double cover sealing structure, and belongs to the technical field of sealing device. When a shielding barrel and a shielding barrel cover are tightly locked, an airtight transferring barrel cover and a shielding barrel cover are in an unlocking state, a gas discharging valve of the shielding barrel cover and a ventilation valve of an airtight transferring barrel cover are automatically started, at the moment shielding isolating device inner cavities are formed by the shielding barrel cover and the airtight transferring barrel cover to allow an airtight transferringbarrel to be communicated with an inner cavity of a shielding barrel, it is ensured that the air pressure in the airtight transferring barrel and the air pressure in the shielding barrel are the same,and therefore the opening and closing of the airtight transferring barrel cover can be smoothly completed; after the airtight transferring barrel cover and the shielding barrel cover are tightly locked, the gas discharging valve of the shielding barrel cover and the ventilation valve of the airtight transferring barrel cover are automatically switched off, and therefore it is ensured that the shielding barrel and the airtight transferring barrel maintain respectively airtight states.

The invention relates to the technical field of automobile part welding, in particular to a part containing frame device for automobile part welding, which comprises a containing box, a lifting frame and a bottom plate, the containing box is arranged on the upper side of the right end of the bottom plate, rotating frames are fixedly connected to the upper sides of the left end and the right end of the containing box, and the rotating frames are rotatably connected into the lifting frame; the lifting frames are arranged on the left side and the right side of the containing box, a lifting plate is fixedly connected to the ends, away from the containing box, of the lifting frames, and a driving plate is slidably connected to the interior of the upper side of the lifting plate. The threaded rod can be matched with the driving plate to enable the lifting plate to ascend and descend, so that the needed containing box can be automatically leaked out, workers can conveniently and rapidly find the needed containing box, the occupied area of the device can be reduced during containing, and meanwhile layered containing can be conveniently achieved.

The invention relates to the technical field of agriculture, in particular to a seed cotton wetting device.The device comprises a seed cotton channel used for conveying seed cotton, an air channel used for delivering hot and wet air to the seed cotton channel, and a premix channel connected with an air source, wherein through holes allowing the hot and wet air to circulate are formed between the air channel and the seed cotton channel, the cross section of the seed cotton channel is in the shape of a strip, and the through holes are transversely arranged along the long sides of the cross section; the premix channel is parallel to the air channel, and input holes used for inputting hot and wet air to the air channel are formed in the extending direction of the premix channel.In this way, the accuracy of control over seed cotton moisture regain and processing quality can be improved remarkably.

The invention relates to a temperature control inflating device for sulfur hexafluoride, wherein the device inflates and re-inflates high-voltage electric equipment and has a temperature control function. The device consists of an inlet joint valve, a heating device, a vacuum pressure controller, a temperature control device, a temperature control probe, a temperature control valve, an outlet joint valve and the like. The heating device consists of a heater, an inner tube and the like. As the temperature control device is adopted, the heater pre-heats and warms to prevent SF6 is prevented from being condensed in an inflating pipeline when the heater performs preheating and heating in winter; and the situation that high-density gas which is not completely vaporized is inflated in summer is avoided, so that normal operation of the high-voltage electrical equipment is ensured. As the vacuum pressure controller is arranged, deflation and inflation are possible and the purity of SF6 inflated is improved during inflation. As the temperature control valve is arranged, the temperature of SF6 inflated is consistent to the environmental temperature. The device is compact in structure, simple and safe to operate and reliable in performance, so that the device has huge practical and promotional values.

The invention discloses a switch electric leakage detection device. The device includes a shell, a first screw rod is movably mounted at the upper end on the inner side of the shell through a thread,a first contact plate is movably mounted at the lower end of the first screw rod on the inner side of the shell through a bearing, a first movable hole is clamped on a lower end surface of the first contact plate, a first conductive column is movably installed on the inner side of the first movable hole, a first spring is fixedly arranged between the first conductive column and the first movable hole, and an electric leakage detector is arranged on an upper end surface of the shell and is electrically connected to the first conductive column. According to the invention, the first screw rod drives the first contact plate and the first conductive column to contact the surface of the switch, detection current is transmitted to the electric leakage detector through the first conductive columnto be displayed and an alert is given by the electric leakage detector, and a second screw rod is rotated to drive a second touch plate and a second conductive column on the other side to be in contact with the other surface of the switch so as to perform electric leakage detection on the switch, so that detection on the switch is realized.

The invention relates to a preparation method of an iron selenide / carbon composite material. The preparation method comprises the steps that (1) a dopamine source and an iron source are added into a solvent in which the dopamine source is dissolved and the iron source is not dissolved, the solvent is removed after uniform mixing, and powder A is obtained; (2) the powder A is subject to pyrolysis under the temperature of 400-700 DEG C in vacuum, and powder B is obtained; and (3) the powder B is mixed with selenium powder, the mixture is subject to pyrolysis under the temperature of 600-900 DEGC, and the iron selenide / carbon composite material is obtained.

The invention discloses a self-aerating and pressure-regulating device for a rubber tire road roller, which belongs to the field of aerating and pressure-regulating devices of rubber tire road rollers. The device comprises a front wheel assembly, a frame, a cab assembly, a power system, a back wheel assembly and an air channel system, wherein the air channel system comprises an air compressor, a pressure valve bank, an aerating valve bank, rotating valves, air tank assembly, pressure gauges, rubber tires, an electromagnetic reversing valve and a deflating valve bank; the air tank assembly is connected with one end of the pressure valve bank, one end of the aerating valve bank and one pressure gauge respectively; the other end of the pressure valve bank is connected with the air compressor; the other end of the aerating valve bank is connected with another pressure gauge, one end of each of a plurality of rotating valves and the deflating valve bank respectively; and the other end of each rotating valve is connected with the rubber tires through the electromagnetic reversing valve. The self-aerating and pressure-regulating device has the advantages that: the aerating way of the conventional rubber tire road roller is greatly improved, an automatic pressure-regulating device is arranged, the complex and dangerous situations caused by an original operation method are avoided, and the reliability and operating convenience are improved.