127results about How to "Make up the gap" patented technology

The invention discloses a topic model-fused scene image classification method, and relates to the field of deep learning and image classification. The method comprises the following steps of: preprocessing data sets, and expanding the quantity of obtained data sets so as to obtain an image data format according with deep learning model processing; constructing a convolutional neural network modelaccording with scene image classification, and pre-training the processed image data sets by using a convolutional neural network; and carrying out end-to-end iterative training on the constructed convolutional neural network by using training sets, adjusting parameters in the network, verifying the trained model by using verification sets, modeling extracted scene image features with discrimination ability, extracting hidden topic variables between the features and images so as to obtain image topic distribution represented by a k-dimensional vector, wherein k represents a topic quantity, each image can be considered as a probability distribution diagram formed by a plurality of topics, and scene image classification is realized by utilizing a classifier.

The invention discloses a power UPS system based on a super-capacitor. The power UPS system comprises a rectifier, an inverter, a bidirectional direct current (DC) / DC converter and an energy storage system. The energy storage system is composed of a super-capacitor group, a super-capacitor equalization circuit and a super-capacitor management system (CMS). The rectifier is used for converting input distribution alternating voltages into high-voltage direct voltages and provides a power supply for the inverter; the inverter is used for converting the high-voltage direct voltages at the front end into alternating voltages meeting load use requirements; and the rectifier performs charge or floating charge on the energy storage system through the bidirectional DC / DC converter. The power UPS system based on the super-capacitor uses the super-capacitor as an energy storage unit, and compensates for electrical energy gaps caused by power equipment during the power shaking of power grids through an online parallel hot spare mode. The power UPS system based on the super-capacitor can work normally at a low temperature (an ultimate temperature minus 40 DEG C), has the advantages of being small in size, free of maintain, long in service life, high in power and reliability and the like and can meet instantaneous power supply requirements of large power.

The invention belongs to the field of preparation of SiC ceramic-based parts, and discloses a preparation method of SiC fiber-reinforced SiC ceramic-based parts and a product. The preparation method comprises the following steps: (a) mixing a thermoplastic phenolic resin, silica powder and silicon carbide fibers to form a mixed solution; (b) treating the mixed solution to obtain composite powder;performing incremental material manufacturing on the composite powder to form a primary body, and performing pyrolysis carbonization on the primary body to obtain preform; (c) infiltrating the preformin a thermosetting phenolic resin solution, curing, and performing pyrolysis carbonization again to form a novel preform; (d) repeating the step (c) again and again to obtain the final preform, reacting and sintering the final preform, reacting carbon in the preform with silicon to produce silicon carbide, thereby obtaining the SiC ceramic-based parts containing silicon carbide fibers. Accordingto the preparation method disclosed by the invention, the SiC fiber-reinforced SiC ceramic-based parts of complicated structures are obtained by near-net forming, the density is high, and the bindingforce is strong.

The invention discloses a scanning path planning method for manufacturing a three-dimensional body layer by layer. A compensation path is additionally arranged between a conventional scanning path jump point at the position of a sharp corner of a cross section of the three-dimensional body with a sharp corner and a vertex of the sharp corner of the cross section of the three-dimensional body. The invention further discloses a scanning method for manufacturing the three-dimensional body layer by layer. The scanning method includes the steps that the cross section of the three-dimensional body with the sharp corner is subject to conventional scanning path planning; the cross section of the three-dimensional body with the sharp corner is subject to compensation path planning; and according to a conventional scanning path and the compensation path, the cross section of the three-dimensional body is subject to scanning sintering, and molding machining of the three-dimensional body is completed. According to the scanning path planning method, the sharp corner of the three-dimensional body is scanned, so that the scanning margin is reduced, the size accuracy of the three-dimensional body is improved, the yield of the three-dimensional body is effectively improved accordingly, and the production cost of an enterprise is reduced.

The invention provides a rolling mould-cutting knife roller with improved structure and belongs to the technology field of machinery. The invention solves the problems that the prior rolling mould-cutting knife roller has short service life and low production efficiency. The rolling mould-cutting knife roller with the improved structure comprises an upper drum, a lower drum and a power mechanism capable of driving the upper and the lower drums to rotate. The upper and the lower drums are mounted on a machine frame, cylindrical shaped upper roller bearers are respectively arranged on two ends of the upper drum, and cylindrical shaped lower roller bearers in contact with the upper roller bearers are respectively arranged on two ends of the lower drum. The upper roller bearers are sleeved on the upper drum and the lower roller bearers are sleeved on the lower drum. An adjusting mechanism capable of adjusting the space between the upper and the lower drums by moving either of the roller bearer shafts and axially positioning the roller bearers on the drums after the roll bearers are adjusted is arranged between the adjacent upper and the lower roller bearers. The rolling mould-cutting knife roller with the improved structure is characterized by simple structure, high efficiency and long service life.

The invention discloses a system and a method for actively acquiring logistic freight source information based on LBS. The system comprises an intelligent mobile terminal, a positioning system, a communication network, an LBS service platform, an LBS service type APP and a server. The method comprises the search mode and the automatic acquiring mode. The method specifically comprises the steps of sending a location service request by a user through the LBS service type APP on the intelligent mobile terminal; transmitting to the LBS service platform through the mobile communication network; transferring the positioning system to determine the current location information of the user through the LBS service platform; sending the location information to server providing the location service through the communication network; searching the geographic information corresponding to the location and the application data from a geographic information database of the server; returning the geographic information and application data to the server through the geographic information database; sending the specific position service information to the intelligent mobile terminal through the communication network by the server. With the adoption of the system and the method, the logistic resource can be reasonably utilized through the highway logistic transportation, and thus the logistics cost can be saved.

The invention provides a discontinuous long fiber reinforced thermoplastic composite material mold pressing precast body and a preparation method thereof. The mold pressing precast body comprises slices formed by slitting / cutting of continuous fiber reinforced thermoplastic composite material preimpregnated sheets / preimpregnated yarns, wherein the length L range of the slices is 5-200 mm, the width W range of the slices is 2-30 mm, and the weight percentage content of fibers in the slices is 20-90 wt%; and high-strength isotropous complicated parts with high size stability can be prepared through secondary mold pressing of the precast body, so that the defects of easy warpup, fiber length loss, weaker part performances, anisotropic mechanical performances of continuous fiber reinforced composite materials and difficult machining of different-thickness complicated parts after mold pressing injection molding of short-fiber and long-fiber particles are made up.

The invention discloses an enzyme detergent and a raw material extraction process, and relates to the technical field of enzyme detergent extraction, in particular to the enzyme detergent and the raw material extraction process. The enzyme detergent is prepared from the following raw materials in parts by weight: 20-30 parts of saponin, 10-20 parts of ferment, 7-11 parts of a mint extracting agent, 3-5 parts of glycerinum, 1-3 parts of edible essence, 3-6 parts of dietary alkali, 6-9 parts of an active agent, 6-9 parts of a thickening foam stabilizer and the balance of deionized water. According to the enzyme detergent and the raw material extraction process, an auxiliary stirring mechanism is arranged, a high-pressure air pump guides high-pressure air into a main shaft through a high-pressure pipe, the main shaft is communicated with a supporting rod, the high-pressure air can be sprayed out through a spraying hole of the supporting rod, and the stirring strength of the supporting rod is improved under the action of a driving gear, a driven gear and a driving motor; therefore, the mixing effect of the raw materials can be effectively enhanced, and the raw materials are stirred in cooperation with the flow dividing rod.

The invention discloses a front defrosting grid for an automobile, which comprises a central air duct and front air grids; the bottom of the central air duct is provided with an air inlet, the middle part thereof is connected with a side defrosting air duct, and the top end thereof is provided with two groups of front air grids which are symmetrically arranged left and right; each front air grid consists of a plurality of flow deflectors with guidance function; the distance of lower ends of two adjacent flow deflectors of each group of front air grids is less than that of upper ends of the two adjacent flow deflectors; and a second flow deflector close to a symmetrical central line of each group of front air grid is consistent with the vertical direction of the automobile, and other flow deflectors are arranged at included angles with the vertical direction. After airflow passes through a group of flow deflectors with gradient angles, two sides of front windscreen are ensured to be blown by enough airflow so as to optimize front defrosting performance effectively, and a condition that a low velocity zone exists in the center because the angles of the flow deflectors are overlarge and most airflow is guided to the two sides is avoided, so the mist or frost on the whole front windscreen is quickly and evenly melted and the driving safety is ensured.

A self-regulating abrasive wheel for automatically regulating the axiality between the abrasive wheel and its central axle features that there are 1-20 ring slots on the inner surface of the central hole of said abrasive wheel and the elastic rings are embedded in said ring slots for interference fit between central axle and elastic ring, so preventing radial jump of abrasive wheel.

The invention discloses a preparation method of an energy-saving floor tile, and belongs to the technical field of preparation of building materials. After a prefabricating body of the floor tile is sintered, polyurethane is pyrolyzed to form a loose porous structure, and thermal phase change microcapsules in paraffin sol are distributed into the pore structure, and can be melted to absorb heat and store energy in summer, and cured to discharge heat and increase temperature in cold days, so as to reduce the electric utilization amount of temperature regulating devices of indoor air conditioners and the like. The energy-saving floor tile has the advantages that the liquid phase is mainly provided by silicon sol, and the amorphous silica in the silicon sol is firstly gelled and dewatered, then generates particle agglomeration in the temperature rising process, so that the powder flowing, dispersing and firing are accelerated, and also can react with other oxides in the substrate at hightemperature, the silicon carbide is oxidized at high temperature, an amorphous oxidizing layer is produced at the surface, the activity of the amorphous oxidizing layer is very high, and the amorphousoxidizing layer can react with impurities in the substrate to generate low-melting point phase for accelerating sintering, so that the sintering temperature of the floor tile is reduced, and the energy consumption in production of the floor tile is decreased; the application prospect is broad.

The invention relates to a floating ball valve dedicated to high-pressure steam and belongs to the technical field of valves. The floating ball valve dedicated to high-pressure steam comprises a valve body, a ball and a valve rod. A first metal valve seat is arranged on one side of a medium inlet end of the valve body, and a second metal valve seat is arranged on one side of the outlet end. The first metal valve seat and the second metal valve seat are attached to the ball to form a metal seal pair. A valve seat compression ring is arranged outside the first metal valve seat, and a disc spring is arranged between the valve seat compression ring and the first metal valve seat. Seal pre-tightening pressure can be set by adjusting compression force of the disc spring. The floating ball valve dedicated to high-pressure steam is good in seal property, low in leakage rate, outstanding in abrasion resistance, convenient to assemble and disassemble, and applicable to working conditions with high working pressure and bad working conditions; besides, for the current situation the current situation that the leakage rate of steam valves in China is high and medium-and-low-pressure steam valves are dominated in China, the floating ball valve can well make up the gap.

The invention discloses a method for improving blood sodium valproate detection sensitivity. The method utilizes ion mobility spectrometry as a basic detection technology, utilizes an ion mobility spectrometer as detection means and utilizes a negative ion high pressure mode, a thermo-desorption sample introduction method and a complex sample-free pre-treatment method. A device used in the method is stable and reliable. The method is simple, fast and efficient. Detection and analysis time of a single sample is less than 1min. The method has high detection sensitivity, a detection limit of 1mg / L and a quantitative analysis concentration scope of 10-200mg / L. The built qualitative and quantitative analysis method satisfies a human body clinical administration concentration analysis scope of 50-100mg / L of epilepsy patients. The detection method can be widely used for clinical administration deep analysis and provides guidance for clinical accurate administration by doctors.

The invention discloses an air compressor humidifying device for a proton exchange membrane fuel cell system. The device comprises a fuel cell; a high-pressure hydrogen cylinder which is connected with a hydrogen inlet of the fuel cell; a water pump which is connected with a tail discharge pure water outlet of the fuel cell; an air compressor, wherein an exhaust port of the air compressor is connected with an air inlet of the fuel cell; and an atomizing nozzle which is arranged at the air inlet end of the air compressor and is connected with the water pump. Tail discharge pure water generatedafter reaction of the fuel cell stack is recycled, and then the water is sprayed back to the air inlet end of the air compressor through the atomizing nozzle by utilizing the water pump, so the humidity of air is increased, and the temperature of the air is reduced.

The invention provides a continuous connecting pipe used for connecting an aluminum alloy core all-aluminum conductor. The continuous connecting pipe is characterized in that the continuous connecting pipe comprises a continuous connecting pipe aluminum pipe 1, an aluminum alloy pressing connecting pipe 2, aluminum bushing pipes 5 and the aluminum alloy core all-aluminum conductor. The aluminum alloy core all-aluminum conductor comprises inner aluminum alloy cores 3 and outer layer all-aluminum conductors 4, and selected models of the aluminum alloy core all-aluminum conductors comprise JLHA1 and JLHA2, the aluminum alloy pressing connecting pipe 2 is connected to the butt-joint aluminum alloy cores 3 and placed in the middle of the continuous connecting pipe aluminum pipe 1, the continuous connecting pipe aluminum pipe 1 is arranged on the outer layer all-aluminum conductors 4, the aluminum bushing pipes 5 are arranged between the continuous connecting pipe aluminum pipe 1 and the outer layer all-aluminum conductors 4 and are arranged at the two ends of the continuous connecting pipe aluminum pipe 1, the continuous connecting pipe aluminum pipe 1, the aluminum alloy pressing connecting pipe 2, the aluminum bushing pipes 5 and an aluminum alloy core aluminum-type-line wire are coaxial. The continuous connecting pipe used for connecting the aluminum alloy core all-aluminum conductor has the advantages of being reasonable in structure, capable of improving material utilization rate, saving in cost, convenient to install, and capable of greatly improving working efficiency.

The invention discloses saussurea involucrate culture composition and glossy ganoderma tea. The tea is prepared from the following raw materials in percentage by weight: 20%-40% of saussurea involucrate culture composition, 15%-25% of glossy ganoderma, 3%-5% of bitter gourd powder, 5%-10% of fig powder, 5%-10% of licorice root, 2%-5% of tea polyphenol, 5%-10% of glucosamine sulfate and 2%-5% of chondroitin sulfate, wherein the saussurea involucrate culture composition is prepared from saussurea involucrate culture powder and saussurea involucrate culture fresh fruits in a mass ratio of 1: (2-4). Due to the saussurea involucrate culture, the problems of lack of wild saussurea involucrate resources and difficulty in artificial cultivation are solved, colchicine is not contained, and the utilization gap of the saussurea involucrate culture fresh fruits in the market is filled up through matching with composition prepared from the saussurea involucrate culture fresh fruits; besides, the adopted glossy ganoderma has a function of increasing the body immunity adjustment and has effects of easing pain, diminishing inflammation and resisting tumors; meanwhile, the glucosamine sulfate and the chondroitin sulfate can effectively prevent and alleviate the arthralgia symptom.

The invention discloses a dry ice cleaning spray nozzle, a dry ice cleaner and a secondary pollution preventing dry ice cleaning method. The dry ice cleaning spray nozzle comprises a spray nozzle mainbody, and a gas curtain spray nozzle, wherein the spray nozzle main body is provided with a structure connecting a dry ice conveying tube and a dry ice gas flow injection channel; the gas curtain spray nozzle surrounds the periphery of the spray nozzle main body, and comprises an inner cavity which surrounds the periphery of the spray nozzle main body and a connecting hole which communicates withthe inner cavity, and is connected to a protective gas source through a protective gas tube; and the gas curtain spray nozzle defines a protective gas curtain which surrounds the periphery of dry icejet flow jetted by the spaying nozzle main body. According to the scheme adopted by the invention, the protective gas curtain formed by protective gas is arranged at the periphery of the dry ice jetflow, and a cleaning surface can be effectively isolated from outside air, so that pollutants such as impurities and water vapor are prevented from being in contact with the cleaning surface; and meanwhile, the cleaned surface is swept through the protective gas curtain, so that the cleaned surface can be dried and can be restored to the room temperature, and therefore, the problem that water vapor is condensed and fogged is solved, protection can be performed throughout the process, and the cleaning effect is guaranteed.

The invention relates to a production method for a rod end joint bearing of a high-precision metal basal body. The production method comprises the following steps: a lathe and a numerical control milling machine are used for machining the inner surface and the outer spherical surface of an inner ring of the rod end joint bearing; the lathe is used for machining an outer ring of the rod end joint bearing and a rod end; the lathe and the numerical control milling machine are used for machining the outer surface and the inner spherical surface of the metal basal body; a seam is cut by a sawing machine in the axial direction of the metal basal body; and the machined inner ring of the rod end joint bearing is pressed into the metal basal body ring. The production method has the following beneficial effects: the traditional adjustment of the wide tightness (gap) of the rod end joint bearing through machining or other methods is changed to the adjustment of the wide tightness (gap) through cutting one seam with a certain size in the axial direction of the metal basal body and extruding and closing the seam, so that the wide tightness (gap) adjustment controllability is improved, the gap and the error caused by machining and abrasion are made up, the product self-lubrication is improved, the bearing quality is enhanced, and the service life is prolonged; a copper material of the metal basal body is replaced; the machining process is improved; the product quality is improved; the production cost is reduced; and the economic benefit is improved.

The invention discloses a preparation method of a stone protective agent for a humid environment of a subway station. The method comprises the following steps of: 1, preparation of an impregnating agent: adding modified wollastonite into a phosphoric acid solution, then adding lauryl sodium sulfate, and performing stirring for 25-35min at a rotating speed of 100-200r / min. Modified wollastonite isused as a main agent for preparing the impregnating agent, wollastonite itself has a needle-shaped structure, so that the impregnating agent can permeate stone under the assistance of a phosphoric acid solution, lauryl sodium sulfate and polymethylhydrosiloxane, stone gaps can be made up, the stone density is improved, the added moisture-proof agent is formed by dispersing organic silicon modifiedpolyethylene dispersion liquid, citric acid and sodium alginate, and is matched with acrylic resin and an polyester emulsion so as to be used as a protective layer of the stone, and a moisture-proofeffect is achieved.

The invention discloses a novel battery module welding tool structure. The novel battery module welding tool structure comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a supporting plate, the surface of the supporting plate is fixedly connected with an air cylinder, the upper surface of the supporting plate is fixedly connected with a top plate, the upper surface of the top plate is in sliding connection with a battery fixing plate, and the upper surface of the top plate is separately and fixedly connected with a gear edge and a check block. In the useprocess, a tapered structure is adopted for the front ends of compaction steel bushings, the front ends of the compaction steel bushings can be attached to bevels of grooves of parallel connection rows, and the concentricity of the parallel connection rows and negative electrode bouncing pieces is guaranteed. In the use process, when the cylinder is compacted, tail springs provide compacting forceto make up for the gap brought by part tolerances, tight attachment of cells, the parallel connection rows and the negative electrode bouncing pieces is guaranteed, the function compatibility can begood in the use process, a fixture has multiple module welding functions, cushion columns and a welding bottom plate are increased, and thus the negative electrode module welding function, the positive electrode module welding function and the middle module welding function can be realized separately.

The invention provides a territorial space planning design drawing system which comprises a support, an angle adjusting assembly is arranged at the top end of the support, the support is connected with a drawing assembly and a shielding assembly through the angle adjusting assembly, a groove is formed in the top end of the support, and symmetrically-arranged first hinge seats are fixed in a groove body of the groove. Through cooperation of the drawing assembly and the shielding assembly, the structure can be switched, the requirements of drawing personnel for computer drawing, manual drawing or combined drawing of the computer drawing and the manual drawing are met, and therefore the applicability of the drawing system is improved.

The invention provides a material damper capable of matching with rollers automatically. The material damper comprises a blade and a blade arbor. The blade comprises a supporting portion and a camber portion; the supporting portion is arranged at the upper end of the camber portion; a shaft sleeve is arranged on the outer side of the supporting portion; one end of the blade arbor is disposed in the shaft sleeve, and the other end of the blade arbor provides an acting force to the rollers; by the acting force, the camber portion closely fits with working faces of two adjacent rollers. Since the damper having continuous downwards pressure fits to the working faces of the rollers, a gap between the damper and the rollers caused by abrasion of the damper is filled, and waste of materials is avoided. Installation position of the blade can be regulated through the blade arbor and the blade which are in movable connection, so that the camber portion of the blade can be matched with the working faces well within a short time and time for assembling is then saved.

The invention relates to a shift handling mechanism with a clearance automatic compensating device. The mechanism comprises a supporting plate, a fixing cover, a small dust-proof cover, a joint bearing, a shift shaft, a locking flange nut, a shift rod assembly and a bracket assembly, wherein the lower end of the fixing cover is connected with the supporting plate; the small dust-proof cover is connected with the upper end of the fixing cover; the joint bearing, the shift shaft, the locking flange nut, the shift shaft assembly and the bracket assembly are positioned in the small dust-proof cover and the fixing cover; and deformation buffering mechanisms are arranged outside the small dust-proof cover and the fixing cover. The shift handling mechanism with the clearance automatic compensating device provided by the invention has the benefits that the shift handling mechanism with a clearance automatic compensating device can adapt to the large amplitude vibration of a four-point suspension cab, through the adoption of the technical scheme, a hard bar handling device can be adopted for the speed changer, thereby solving the problem that hard bar handling cannot be carried out due to the large amplitude vibration of the cab, and further improving the comfortableness of the whole vehicle and bringing safety and comfort to drivers and passengers.

The invention discloses a video-paragraph retrieval method and a video-paragraph retrieval system based on a local-overall graph inference network, which belong to the field of cross-modal retrieval. The method mainly comprise the following steps of: 1) firstly preprocessing videos and texts (paragraph); 2) encoding given videos and texts by using a local-overall graph inference network to obtain final video features and text features; 3) calculating the similarity between the video features and the text features by using cosine similarity; 4) performing retrieval according to a similarity measurement result. Compared with a traditional video-paragraph retrieval method, the video-paragraph retrieval method has the advantages that the video and the text are decomposed into four layers of semantic structures respectively, the four layers of semantic structures are constructed into the local graph and the overall graph respectively, then the graph convolution network is used for conducting graph reasoning operation, and the result obtained in video-paragraph retrieval is better than that obtained in the traditional method.

The invention discloses a wavelet denoising method based on an improved threshold function. Noised signals are decomposed through a wavelet basis, and a wavelet decomposition coefficient is obtained; a VisuShrink threshold is selected as a judgment threshold, wavelet coefficients larger than the threshold are reserved, wavelet coefficients smaller than the threshold are abandoned, signal denoising is achieved, high applicability is achieved, a threshold function is improved, and an adjustable threshold function is obtained; filtering the wavelet coefficient according to the improved adjustable threshold function to obtain an estimated wavelet coefficient; and reconstructing the signal by using wavelet inverse transformation to obtain a denoised signal. The adjustable threshold function sets adjustable parameters in the application, and de-noising is carried out on different data systems; continuity and high-order derivation are achieved, and the defect that a hard threshold function generates discontinuity is overcome; the adjustable threshold function well retains the local features of the signal, reduces the influence of uncontrollable noise, and reduces the loss of low-frequency signal information.

The invention discloses a composition for dietetic therapy, reducing weight and reducing blood lipid and a preparation method of the composition. The composition is prepared from the raw materials of duck blood, cordyceps militaris, ginseng, bitter gourds, navy beans, auxiliary materials and the like. The composition is prepared through the following technological processes of performing sterilization, drying, crushing and mixing on the raw materials, adding the auxiliary materials including edible starch, dextrin, xylitol, polyvidone K30 and the like, uniformly mixing the processed raw materials and the added auxiliary materials so as to obtain mixtures; granulating the mixtures so as to obtain granules; tabletting the granules so as to obtain tablets; and airing the tablets, selecting qualified tablets, and packaging the selected tablets so as to obtain tabletting foods containing the composition and used for dietetic therapy, reducing weight and reducing blood lipid. The composition disclosed by the invention is formed according to the scientific principle of reducing weight and reducing blood lipid, the catabolism of fat can be accelerated, and the effects of dietetic therapy, reducing weight and reducing blood lipid are achieved. Compared with conventional like products in the current market, the composition disclosed by the invention is safe to eat, free from dependence, not easy to generate the springback phenomenon, free from obvious toxic and side effects and beneficial to the health of bodies.

The invention relates to the technical field of a household appliance, in particular to a cover body assembly and a household appliance. The cover assembly provided by the invention comprises a cover body structure, wherein one end of the cover body structure is used for being rotatablely connected onto a main body structure of the household appliance so that the cover body structure can be opened and closed relative to the main body structure; in addition, the cover body assembly also comprises a sealing element arranged on the cover body structure; a projected part is formed between a first sealing part of the sealing element and a second sealing part bended towards the upper side relative to the first sealing part; a hollow space is formed between the upper surface of the projected part and the cover body structure; in addition, the lower surface of the projected part is abutted against and connected with the top wall of the main body structure. The tight sealing is formed between the projected part of the sealing element and the main body structure; the sealing effect is good; water vapor and the like can be more effectively prevented from being leaked from a gap formed between the cover body structure and the main body structure.

The invention relates to a direct current wet-type electromagnet for a valve, and belongs to the technical field of machinery. The direct current wet-type electromagnet for the valve comprises a coil,a guide sleeve, a fixed magnetic pole and an iron core. The iron core is made of silicon steel sheets, and each silicon steel sheet comprises a core part, a transition layer and an insulative corrosion-resistant layer. Each core part is made from silicon steel alloy prepared from, by mass, 0.03-0.05% of C, 3.5-5.5% of Si, 1.1-2.3% of Al, 0.3-0.5% of Mn, 0.05-0.07% of Cr, 0.5-0.8% of Sn, 0.3-0.5%of N, 0.06-0.08% of Mo, 0.08-0.16% of Ga, 0.2-0.6% of Ag, 0.005-0.01% of Gd and the balance iron and inevitable impurities. The direct current wet-type electromagnet for the valve has the advantages of being little in iron loss, resistant to corrosion and long in service life.

The invention discloses an environment-friendly road construction method which comprises the following steps: S1, road surface crushing: after reaching a to-be-maintained road surface, crushing a corresponding road surface asphalt layer into small blocks through a hydraulic pickaxe, and S2, collecting and storing: pushing a mounting vehicle plate to the side surface of the to-be-crushed road surface through a longitudinal guide wheel and a horizontal guide wheel, and then carrying out road surface maintenance. According to the device, the labor intensity of road maintenance personnel is effectively reduced, meanwhile, when the collecting device is used, only one maintenance personnel needs to use a hydraulic pickaxe to damage the road surface, and the device is simple in structure, convenient to use and high in practicability. The asphalt fragments are collected by one cleaning person through the collecting device, so that simple preparation work can be completed, the personnel density in a single area is reduced, safety accidents caused by collision between instruments and personnel are reduced, and the use safety of the collecting device is effectively improved.