53results about How to "Prevent shrinkage" patented technology

The invention belongs to the technical field of biology, and relates to a bronchoalveolar lavage fluid (BALF) preserving fluid, a kit and a cytological test method. The preservation solution is composed of TCEP, N-acetylcysteine, EDTA.2Na, trehalose, Proclin300, methanol, sodium chloride and HEPES, and all the components have a synergistic effect to achieve sample viscosity removal, oxidation resistance, corrosion prevention, cell protection and pH stabilization. The preserving fluid is suitable for morphological observation and nucleic acid detection of BALF cells, and can stably preserve samples at room temperature and maintain completeness of cell membranes and clear morphological structure. The kit comprises two preparations which are mixed to form a working solution, and the working solution can be directly used for sample preservation on a sampling site. The cytological test method comprises the steps of sample collection, preservation, centrifugal slide preparation, Wright-Giemsa staining and microscopic observation. Experimental results show that preservation solutions of different formulas are compatible with a chromosome system, the cell morphology is kept stable within 3 days, the dyeing effect is good, and it is proved that the preservation system can remarkably improve the preservation stability and detection reliability of BALF samples and is suitable for cytology and molecular diagnosis application of lower respiratory diseases.

The invention discloses efficient closed-pore high-stability slurry and a preparation method thereof, a lithium ion battery and electric equipment, and relates to the technical field of lithium batteries, the efficient closed-pore high-stability slurry comprises water, core-shell microspheres, a heat stabilizer, a wetting auxiliary agent and a dispersing auxiliary agent, the core-shell microspheres comprise first core-shell particles and second core-shell particles, the core of the first core-shell particle is a mixture of a heat conducting agent and a flame retardant, or a composition of any one or more of the heat conducting agents, and the shell of the first core-shell particle is a mixture of a thermosensitive accelerator and a thermosensitive main agent, or a composition of any one or more of the thermosensitive accelerators; the core of the second core-shell particle is a mixture of a heat conducting agent and a flame retardant, or a composition of any one or more of the flame retardants, and the shell of the second core-shell particle is a mixture of a thermosensitive accelerator and a thermosensitive main agent, or a composition of any one or more of the thermosensitive main agents. The material has the advantages of early quick and synchronous response to temperature change, excellent thermal stability and excellent flame retardancy.

The invention belongs to the technical field of silicon carbide flat membranes, and particularly provides a high-electronegativity silicon carbide flat membrane material and a preparation method thereof. The invention relates to a preparation method of a high-electronegativity silicon carbide flat sheet membrane material, which comprises the following steps: mixing phytic acid and an organic solvent to prepare a precursor solution, impregnating a silicon carbide flat sheet membrane substrate with the precursor solution, carrying out a reaction, and carrying out stage heat treatment. The high-electronegativity silicon carbide flat sheet membrane material prepared by the method has high electronegativity in a wide pH range, the water permeation flux is high, and after multiple humic acid pollution-cleaning cycles, the flux attenuation is less, and the anti-pollution performance is good. When silica sol is added into the precursor solution, the electronegativity of the silicon carbide flat sheet membrane material can be further improved, so that the anti-pollution performance of the high-electronegativity silicon carbide flat sheet membrane material is further improved.

This application relates to the field of aerosol generation technology, and discloses a heating component and an aerosol generation device. The heating component includes a ceramic part and a heating element. The ceramic part has a first end and a second end facing away from each other. The ceramic part is provided with a receiving cavity, the extension direction of which is the same as the arrangement direction of the first end and the second end. The receiving cavity has an opening formed on the surface of the first end away from the second end. The heating element is disposed within the ceramic part and surrounds the receiving cavity. The distance between the surface of the first end away from the second end and the heating element is less than or equal to 2.5 mm; the distance between the surface of the second end away from the first end and the heating element is less than or equal to 2.5 mm. The heating component and aerosol generation device provided in this application are used to improve the problem of easy shrinkage or collapse of the ceramic part of the heating component in related technologies.

This utility model relates to the field of stainless steel water meter casing stacking technology, and discloses a stacking process structure for stainless steel water meter casings with a one-inlet-four-outlet planar water inlet and outlet, including a main gating system. A gating riser is fixedly connected to the top of the main gating system. Multiple branch gating systems are evenly distributed on both sides of the main gating system. A central flange annular opening is fixedly connected to the side of each branch gating system away from the main gating system. A concealed riser is fixedly connected to the top of the central flange annular opening. An inlet / outlet assembly is provided outside the central flange annular opening. The inlet / outlet assembly includes multiple water meter casing inlet pipes, one side of which is fixedly connected to one side of the central flange annular opening. In this utility model, the parallel stacking structure significantly improves cutting efficiency, reduces processing defects, lowers costs, and automatically disintegrates the sand shell after mold cooling, simplifying the casting separation process, improving production efficiency and product quality. Ultimately, the casting has high density and superior mechanical properties.

This invention relates to the field of water-soluble polymer materials technology, and discloses a comb-shaped ternary polymer and its preparation process. The polyacrylamide is polymerized from a backbone monomer, anionic monomer, comb-shaped macromolecular monomer, and optional functional reinforcing monomers under the action of a redox and azo-based composite initiation system. The preparation process includes solution preparation and neutralization, deoxygenation and temperature control, adiabatic polymerization, and post-treatment steps, employing a control strategy combining low-temperature initiation and adiabatic temperature rise polymerization. This invention effectively overcomes the defects of traditional linear polymers—low viscosity retention and poor shear resistance—in high-temperature and high-salt environments by introducing comb-shaped side chains to create a steric hindrance effect. The resulting product possesses ultra-high molecular weight, low water-insoluble content, and excellent solubility, exhibiting excellent salt-resistant thickening advantages and mechanical stability, meeting the oil displacement requirements of harsh reservoir environments.

This invention belongs to the field of building materials technology. Specifically, it discloses a glaze for preventing ceramic tile deformation and an anti-deformation ceramic tile, comprising the following raw materials in parts by weight: 15-30 parts spodumene, 15-30 parts calcite, 12-20 parts bauxite, 8-15 parts pyrophyllite, 6-12 parts modified magnesium borate whiskers, 5-9 parts wet-process mica powder, 3-6 parts palygorskite, 1-2.5 parts calcium borate, 1-2 parts tricalcium silicate, and 0.2-0.7 parts ammonium fluoride. The system of this invention uses spodumene, calcite, bauxite, and pyrophyllite as the matrix minerals, effectively lowering the sintering temperature and providing basic strength to the system. At a lower firing temperature, a high degree of sintering of the glaze layer can be ensured, preventing sintering failure of other materials. By adding modified magnesium borate whiskers and wet-process mica powder, the flexural strength is effectively improved.

The application provides a two-step wet production line for preventing shrinkage of automobile canopy, which comprises two front-to-rear horizontal first tracks arranged side by side, the inner side walls of the two first tracks are respectively provided with front-to-rear movable sliding blocks at the rear ends, the inner side walls of the two sliding blocks are respectively provided with upper and lower lifting sliding blocks at the upper portions, the inner side walls of the two lifting sliding blocks are respectively provided with two horizontally opposite clamping jaws, the left and right sides of the top base material are respectively clamped between the upper and lower clamping plates of the two clamping jaws; the inner side walls of the lower clamping plates of the two clamping jaws are respectively provided with two staggered horizontal plates at the bottom portions; the inner side walls of the lower portions of the two sliding blocks are respectively provided with two horizontal supporting plates, the two horizontal supporting plates are respectively located directly below the two staggered horizontal plates, and the two staggered horizontal plates and the two horizontal supporting plates jointly clamp the left and right sides of the middle PU base material and the bottom base material; the two staggered horizontal plates can be horizontally retracted into the corresponding lower clamping plates; and an upper die and a lower die are arranged between the front portions of the two first tracks.

The present application relates to the technical field of image data processing, and particularly relates to a carbon slide edge detection optimization method based on cascade filtering. The present application extracts local mean, local median and local variance from the carbon slide gray image pixel by pixel, and corrects abnormal statistics after three layers of verification. The pixel uncertainty descriptor composed of the variance term, mean and median of local gray level quantifies and distinguishes the contribution proportion of Gaussian noise and impulse noise. The quantile feature working point is extracted from the uncertainty descriptor field, and the pixel-level hybrid weight is generated by the serial cascade link composed of the sorting filter, bilateral filter and anisotropic diffusion filter through Sigmoid mapping, so as to perform the cascade recursion in the convex combination fusion mode. The adaptive edge judgment threshold is constructed by combining the local gradient kurtosis and the local gradient absolute median difference with the centralization reference of the median, and the suspicious false edge is filtered through the connected component length threshold, and the final edge map is output after the secondary judgment of the corrected threshold.

The application relates to the technical field of flue gas dust removal, and discloses an intelligent dust removal device and method for garbage incineration flue gas treatment, which comprises a dust removal box and a plurality of cloth bags arranged in the dust removal box, a dust inlet fixedly communicated with one side of the dust removal box, an air outlet fixedly communicated with the back of the dust removal box, a plate removal assembly arranged in the dust removal box, and the like. Through the use of the plate removal assembly, the fixed box is driven to ascend by the telescopic rod of the driving cylinder, the fixed box pulls the pull rope in the ascending process, the pull rope drives the rotating rod to rotate through the storage wheel, the rotating rod drives the fixed tooth plate to move through the half gear, the fixed tooth plate drives the sealing plate and the extrusion arc block to move, the sealing plate drives the spring to stretch, when the half gear is no longer in contact with the fixed tooth plate, the spring returns to the initial state, and then the extrusion arc block reciprocally moves, so that the extrusion arc block extrudes and breaks the bag cementation on the surface of the cloth bag, thereby achieving the effect of facilitating the breaking.

The application belongs to the technical field of non-ferrous metallurgy, and particularly relates to a low-cost and high-efficiency smelting method for high-homogenization magnesium-lithium alloy, which comprises the following steps: preparing a closed crucible with a proper volume according to the size requirement of the cast ingot for later processing, selecting a seamless steel pipe, welding the bottom of the steel pipe first, adding raw materials, welding the top of the steel pipe and reserving a vacuum interface, pressure welding the reserved vacuum interface after vacuumizing; placing the closed crucible into an industrial electric furnace, heating to fully melt and mix the metal in the crucible; after smelting is completed, taking out the sealed crucible from the electric furnace and vertically placing it into a water cooling tank; uniformly treating the completely cooled crucible first, then removing the steel skin on the surface by machining, and taking out the cast ingot of the magnesium-lithium alloy. The method effectively solves the problems of high burning loss rate, high cost and low efficiency in the traditional vacuum induction smelting process of the magnesium-lithium alloy, and has the advantages of precise alloy component control and uniform distribution of solute elements.

This utility model relates to the field of thermos cup technology, and in particular discloses a pure silver inner liner for thermos cups, including a straight cylindrical lower body. A base is formed at the bottom of the lower body, and the base has an inwardly embossed pattern protruding into the inner liner. An upper cylindrical body, wider at the top and narrower at the bottom, is formed at the upper end of the lower body. The upper end of the upper cylindrical body is bent outward to form a folded portion, and the end of the folded portion folds back into the upper cylindrical body to form an outer attachment portion. The upper end of the metal inner liner of the thermos cup is sandwiched between the outer attachment portion and the upper cylindrical body. A covering portion is formed on the outer wall of the outer attachment portion, which is tightly fitted and fixed to the groove of the outer wall of the metal support. The beneficial effects are: processing the inwardly embossed pattern at the bottom of the silver inner liner can improve the bottom strength of the silver inner liner, preventing it from shrinking and deforming after heating; forming the upper cylindrical body at the top of the lower body and ensuring that the height of the upper cylindrical body is greater than that of the lower cylindrical body, utilizing the conical structure, improves the overall structural strength and prevents shrinkage and deformation during use.

A method for removing a weft thread which has been introduced incorrectly on an air-jet weaving machine and a corresponding air-jet weaving machine are proposed, wherein a first drive device drives an opening mechanism and wherein a second drive device drives a sley (36) together with the guide bars (32). A control mechanism operates the first drive device and the second drive device such that they run synchronously with one another in a normal weaving operation. The method according to the invention comprises the following steps: detecting a weft thread which has been introduced incorrectly into the shed with at least one warp thread stop motion; cancelling the synchronization between the first and second drive devices by means of the control mechanism; operating the second drive device by means of the control mechanism such that the guide bars (32) assume a first swivel position which swivels away from the warp-weft thread interlacing point (66); operating the first drive device by means of the control mechanism such that the opening mechanism converts the shed into a first open position with a relatively small opening angle (a); removing the incorrectly introduced weft thread on the introduction side or the exit side; cutting off the incorrectly introduced weft thread on the introduction side; and removing the incorrectly introduced and cut-off weft thread.

The invention relates to the technical field of precious metal metallurgy, and discloses a high-density iridium ingot sedimentation type smelting process which comprises the following steps: preparing a water-cooled copper crucible with a zirconium oxide inner wall coating; iridium powder and calcium oxide powder are mixed and put into a crucible; performing induction heating in a vacuum environment until the raw materials are molten; protective gas is inflated, periodic variable-pressure oscillation operation is applied under the condition that the temperature of the melt is kept, and slag crust on the surface of the melt is destroyed through pressure fluctuation and deep gas is promoted to be exhausted; after oscillation is stopped, the melt is left to stand, and a slag system floats upwards and is separated; and establishing a bottom-to-top temperature gradient to control directional solidification of the melt. According to the invention, oxide hard shells are destroyed through a variable-pressure oscillation mechanism, and efficient degassing and impurity removal are realized by cooperating with calcium oxide slagging; the zirconia coating effectively prevents the crucible material from being polluted; the directional solidification and hot isostatic pressing process eliminates internal shrinkage cavities and looseness. According to the process, the impurity content in the iridium ingot is remarkably reduced, and the purity and compactness of the material are improved.

The invention discloses a metal goods shelf beam welding device which comprises a machine base, a clamping mechanism is arranged on the top face of the machine base, a welding mechanism is arranged on the top face of the machine base, an auxiliary mechanism is arranged on the surface of the clamping mechanism, a seam grinding mechanism is arranged on the rear side of the auxiliary mechanism, and a hydraulic cylinder is fixedly connected to the top face of the machine base. The left side of the hydraulic cylinder is fixedly connected with a clamping base, the surface of the clamping base is fixedly connected with a first fixing block, the bottom face of the first fixing block makes contact with the top face of the machine base, and the inner wall of the first fixing block is fixedly connected with an inclined block. The effect of inserting pins between the two cross beams is achieved, workpiece shrinkage and mechanical reversible deformation after welding and cooling are prevented, deformation and sinking after welding are effectively restrained through internal supporting and precise positioning, the weld penetration and structural compactness are improved, and the overall welding quality of the goods shelf cross beams is improved.

The utility model discloses a die for accurately controlling the outer diameter of a hot-rolled seamless steel pipe, which relates to the technical field of seamless steel pipe processing and comprises a workbench, a clamp disc slidably mounted on the workbench, a die rod clamped and mounted on the clamp disc, a sliding frame slidably mounted in a through groove, and a rotating ring rotatably mounted in the sliding frame. A square frame is fixedly mounted in the rotating ring, mounting frames are movably mounted on the four edges of the interior of the square frame, extrusion rollers are rotationally mounted in the four mounting frames, hydraulic cylinders are fixedly mounted on the four edges of the exterior of the square frame, a gear ring is fixedly mounted on the outer ring of the rotating ring, and a third motor is fixedly mounted at the top end of the sliding frame; according to the seamless steel pipe extrusion die, the die rod with the corresponding size is inserted into a seamless steel pipe in a penetrating mode according to the inner diameter size of the seamless steel pipe before the seamless steel pipe is extruded, and the inner diameter of the seamless steel pipe can be prevented from being reduced during extrusion.

The utility model provides a door sealing opening anti-cracking structure, and relates to the technical field of buildings. The door sealing opening anti-cracking structure comprises a new wall body and an old wall body, a plurality of embedded steel bars are arranged between the new wall body and the old wall body, one ends of the embedded steel bars are embedded into the new wall body, and the other ends of the embedded steel bars are embedded into the old wall body; reinforcing plates are symmetrically arranged on the two sides of the new wall body, the reinforcing plates are connected through a first connecting piece and a second connecting piece, and an inner reinforcing layer and an outer reinforcing layer are arranged on the inner side and the outer side of each reinforcing plate respectively. The anti-cracking structure can improve the connecting strength of the new wall and the old wall, prevent the wall from cracking and improve the attractiveness of the wall.

The application discloses an aqueous iron-based ceramic antirust paint, and relates to the technical field of paint, which comprises a primer and a topcoat; the primer is composed of 52-60wt% of primer ceramic precursors, 16-20wt% of primer film-forming resins, 22-26wt% of primer functional fillers and 1.8-2.0wt% of primer auxiliaries; the topcoat is composed of 66-72wt% of topcoat ceramic precursors, 28-32wt% of topcoat film-forming resins and 1.5-2wt% of topcoat auxiliaries; wherein the primer ceramic precursors comprise primer base sol, glacial acetic acid, amino silane, MTMS, organic titanate chelating agent and deionized water; the primer film-forming resins are organic silicon-acrylic acid graft emulsion with a core-shell structure; the topcoat ceramic precursors comprise topcoat base sol, glacial acetic acid, GPTMS, MTMS, hydroxyl-terminated organic silicon oligomer, structure regulator and deionized water; and the topcoat film-forming resins are aqueous hydroxyl / amino bifunctional organic silicon resin compounds. The application has the effect of improving film-forming protection performance.

The invention relates to the technical field of lithium ion batteries, in particular to a battery diaphragm, a preparation method of the battery diaphragm and a lithium ion battery, and the battery diaphragm comprises a flexible film substrate, and a ceramic coating and a polydopamine coating which are sequentially arranged on the surface of the film substrate from inside to outside. According to the technical scheme, the ceramic coating and the polydopamine coating are compounded on the membrane substrate, so that the electrolyte affinity and the thermal stability of the battery diaphragm can be effectively improved, and the electrochemical performance and the use safety of a battery can be improved.

The invention provides microporous low-shrinkage concrete and a preparation method thereof, and belongs to the field of concrete.The microporous low-shrinkage concrete is prepared from, by weight, 300-380 parts of cement, 30-70 parts of fly ash, 250-350 parts of medium sand, 1200-1550 parts of guar stone, 5-10 parts of silica fume, 2-4 parts of dihydrate gypsum, 0.5-2 parts of water glass, 2-5 parts of a water reducing agent, 0.1-0.3 part of a retarder, 4-8 parts of rubber powder, 0.02-0.08 part of a thickening agent and 2-6 parts of water absorption fibers. 110 to 150 parts of water; and the porosity of the microporous low-shrinkage concrete is 8-10%. Through innovative material design and a synergistic effect, comprehensive improvement of waterproofness, crack resistance, construction performance and economical efficiency is achieved, seepage water can be changed from blocking to dredging through a unique micropore structure, and the efficient and durable anti-seepage effect is achieved; meanwhile, the stability of a base layer is guaranteed through high strength, strong bonding force is formed with a surface layer, and hollowing and cracking are effectively eradicated; in addition, the water-absorbing fiber internal curing component and the expansion component cooperate, so that the cracking risk is avoided, and the long-term stability and safety of the floor system are guaranteed.

This invention provides a cotton field sprayer based on drip irrigation technology, comprising a drip irrigation system including a main pipe, branch pipes, a return pipe, and a water tank. The main pipe and return pipe are connected by several sets of branch pipes. Several sets of connectors are provided on the outside of the branch pipes. A spraying component is fixedly connected to one end of each connector. The main pipe is connected to the outlet of the water tank, and the return pipe is connected to the inlet of the water tank. Each connector includes a connecting pipe with a positioning hole at one end and a sealing groove on the outside. Several sets of arc-shaped protrusions are fixedly connected to the upper part of the positioning hole. By fixing connectors on the branch pipes and connecting the spraying components through the connectors, this invention allows the pesticide to be delivered inside the cotton field based on the drip irrigation system and then sprayed onto the cotton plants through the spraying components. This effectively reduces the labor intensity of cotton field spraying and, to a certain extent, reduces the cost of cotton field spraying.

The application discloses a preparation method of an ultra-high voltage AC / DC unequal-diameter cable soft joint, mainly including two core steps of inner semi-conductive shielding layer recovery and main insulation layer recovery. In the inner semi-conductive shielding layer recovery process, the conductor connection area is first wrapped with a shielding tape, and then is heated and shaped by using an inner shielding variable-diameter mold; the transition slope of the inner cavity of the mold is accurately matched with the transition slope of the conductor welding part, so that the interface contact characteristics are optimized and effective strength compensation is realized. In the main insulation layer recovery process, the extrusion crosslinking process is accurately divided into four stages of starting and filling, transition and forming, stable production, ending and deceleration, and the extrusion speed, heating temperature and mold pressure of each stage are controlled accurately in sections. The smooth filling, uniform coating and dense forming of the insulation material in the variable-diameter mold cavity are ensured, and the thermal degradation and structure defects of the material are effectively inhibited.

This utility model discloses a retaining ring support fixture. It includes: a slider chuck with a protrusion at its bottom; a base with a guide groove that mates with the protrusion of the slider chuck; a central hole at the tail of the base; a guide screw that passes through the central hole of the base and is fixedly connected to the slider chuck; a wing nut that is threadedly connected to the end of the guide screw; one end of the slider chuck being fixedly connected to the retaining ring; and the other end of the base being fixedly connected to the retaining ring. The slider chuck can move axially within the guide groove. Rotating the wing nut drives the slider chuck to generate axial displacement along the guide groove, thereby achieving elastic deformation control of the retaining ring. This retaining ring support fixture, through the threaded transmission of the wing nut and the guide screw, and the sliding engagement of the slider chuck in the guide groove, can achieve precise elastic deformation control of the retaining ring; assembly can be completed by a single person.

The utility model relates to a knob assembly for cooking equipment. The utility model discloses a base (110) that drive shaft (71) passes through. The utility model has the knob main part (NB) that rotates with the above-mentioned drive shaft (71) as the center and moves linearly with the axial direction of the above-mentioned drive shaft (71). The knob main part (NB) has a locking button (140) with an operating part (143) exposed to the outside. At this time, the locking button (140) has a first position that is restricted from moving axially by the base (110) and a second position that can move axially. Therefore, the user can only press the locking button (140) first, then press the knob main part (NB) axially to make the cooking equipment work, so that the knob assembly can be prevented from being operated or malfunctioning by the locking button (140).

The application belongs to the technical field of garment processing, and discloses an angle-adjustable flattening device for garment processing, which comprises a main working shell, a threaded plate and a sliding plate drive a horizontal rod to move, the horizontal rod drives a square shell to move, when the square shell approaches the extrusion plate, the extrusion plate will enter the inside of the square shell along the second square hole and the first square hole, the inside of the square shell is extruded to make the lifting plate in the square shell move upwards, the lifting plate drives the vertical rod, the strip shell and the rotating belt to move upwards, the threaded plate and the sliding plate drive the rotating belt to move close to each other, so as to clamp the transported cloth, and when the rotating belts at the left and right ends move away from each other, the cloth can be pulled to move to both sides, so that wrinkles are prevented from being generated when the cloth is rolled between the lower flattening roller and the upper flattening roller, wrinkles are avoided from being generated due to unstable tension or angle during the flattening process, and the flattening effect of the equipment and the flatness of the processed cloth are improved.

The invention discloses an organic-inorganic hybrid composite dust suppressant with rolling compaction resistance and a preparation method thereof. The organic-inorganic hybrid composite dust suppressant comprises the following raw material components in percentage by weight: (A) 10-20% of an organic-inorganic hybrid polymer; (B) 1%-3% of an inorganic nano material; (C) 1%-3% of a humectant; (D) 0.15%-0.45% of a wetting penetrant; (E) 0.75%-3% of a stable dispersion system; and (F) water: the balance being water, wherein the total percentage is 100%. Comprising the following steps: preparing a water-phase base solution, preparing an oil-phase pre-emulsion, carrying out in-situ hybridization polymerization, and carrying out functional compounding. A cured layer formed after the prepared composite dust suppressant is applied to mine road dust control can lock moisture for a long time and prevent a cured shell layer from shrinking and embrittling due to excessive drying, the composite dust suppressant has enough mechanical strength and excellent toughness, and organic-inorganic components of the composite dust suppressant must have a strong interface chemical binding force, so that the composite dust suppressant has a very good application prospect. And rolling impact and shearing of heavy-load vehicles can be effectively resisted.

The utility model discloses a salvage half-way well cementation drilling-free device which comprises a salvage cylinder, a shell and a lower connector, the shell and the lower connector are connected to the outer side of the salvage cylinder, a closing cavity is formed between the salvage cylinder and the shell, a closing sleeve fixed through a salvage pin is arranged in the closing cavity, and through circulating holes are formed in the shell, the closing sleeve and the salvage cylinder; the inner side of the lower connector is connected with a ball seat through a plug, and the plug and the insertion pipe are locked through a fixing shear pin and an elastic locking block. During operation, the opening pin and the closing pin are sheared off through grading hydraulic pressure, opening and closing of the circulating hole are achieved, after well cementation, the fishing barrel is lifted upwards to trigger elastic contraction of the locking block, the plug and the lower connector are unlocked, and the inner core assembly is lifted out. According to the device, a plug drilling link is omitted, the operation period is shortened, the shaft keeps full bore after fishing, core components are modularly designed to support repeated use, and the device is efficient, environmentally friendly and economical.

The utility model discloses a board to board connector female seat, including being equipped with female seat main part, first electrically conductive body and mounting plate, the female seat main part is equipped with installation cavity and the first installation hole of the female seat main part, this first electrically conductive body includes fixed part and clamping part, and the fixed part one end is connected with the first welding portion through the connecting portion, and the other end is connected with the clamping part, the first installation hole includes fixed hole and the spacing hole of the fixed hole same direction and aperture less than fixed hole, when the fixed part and fixed hole hole wall resist and fix with the first electrically conductive body and female seat main part fixed, the mounting plate is fixed in the installation cavity after the connecting portion is set, and the mounting plate makes the clamping part one end butt joint in fixed hole tail end, and the contact gap on the clamping part is on same straight line with spacing hole. Because the fixed hole of larger aperture cooperates with the fixed part, can make the contact gap on the clamping part be located in the middle of installation hole, avoid the easy damage of using when deviating. Also can avoid the shrinkage phenomenon in the forming process.

The invention relates to the technical field of battery processing equipment, in particular to coating and drying equipment. The coating drying equipment comprises an unwinding mechanism and a drying mechanism, the coating mechanism is positioned at the downstream of the unwinding mechanism; the drying mechanism comprises a heating tank, and the heating tank is positioned at the downstream of the coating mechanism; and the winding mechanism is positioned at the downstream of the heating tank. According to the coating drying equipment, the drying efficiency is high, and cracks are not prone to occurring on the surface of the catalyst layer.

The application discloses a kind of storage methods for improving the sugar content of Chinese chestnut, belongs to the technical field of storage.The method comprises: after screening, Chinese chestnut is moved into modified atmosphere cold store, pretreatment is carried out, then material temperature is controlled to be reduced to 5 DEG C within 5 days, then it is evenly reduced to 0 DEG C on the 5-14th day, then it is kept at-1 DEG C ± 0.1 DEG C, oxygen is controlled to be 5% VOL before entering warehouse, 21% VOL subsequently;Carbon dioxide is less than or equal to 4500ppm before the 14th day, reduced to less than or equal to 2500ppm before 15 days of end;The present application can effectively improve the peak sugar content of Chinese chestnut by heat excitation, subsection cooling, gas control, shorten saccharification time, reduce the rate of mildewing, and keep high good fruit rate and excellent flavor after long-term storage.