28results about How to "Volume stability" patented technology

The present invention provides a method for preparing a keratinized gingival repair scaffold, wherein the active powder of biological microspheres is dispersed in a protein slurry to obtain a loose surface stock solution, which is freeze-dried together with a cell-free matrix material, and after two cross-linkings, a keratinized gingival repair scaffold with a loose surface and a dense surface is obtained. When in use, the loose surface of the porous sponge structure contacts the wound surface, which is conducive to the attachment and growth of tissue cells, and the dense surface can seal and protect the wound to a certain extent in an open healing environment. The obtained keratinized gingival repair scaffold can effectively maintain and regulate the pH environment in the oral cavity, inhibit bacteria and resist bacteria, and inhibit the growth of acid-producing bacteria such as Streptococcus mutans and bacteria with strong caries-causing properties, and at the same time has the ability to stop bleeding, promote bone growth and periodontal ligament regeneration, and inhibit periodontal epithelial regression.

The invention belongs to the technical field of reverse water gas shift, and discloses a method for catalyzing reverse water gas shift by magnetic induction, which comprises the following steps: tabletting and molding a magnetic catalyst and white carbon black to obtain a catalyst; a catalyst is placed in an induction coil area of induction heating equipment, mixed gas of CO2 and H2 is introduced, a reverse water-gas shift reaction is carried out, the reaction pressure is normal pressure, the alternating frequency is 50-300 KHz, and CO is produced. According to the invention, the charge-spin concerted catalysis reverse water-gas shift process of the catalyst is realized through the action of the magnetic field. The reverse water-gas shift reaction is a strong heat absorption process and needs a high reaction temperature, and the reverse water-gas shift catalyst used in the magnetic induction system has a heating effect and a catalytic effect at the same time and can achieve excellent performance at a low temperature. And the problems of high energy consumption, low energy utilization rate and non-uniform heating of the traditional catalytic reaction are avoided.

The invention discloses a volume-stable high-magnesium Portland cement clinker, a preparation method and high-magnesium Portland cement. The clinker is prepared from the following mineral components in percentage by weight: 45 to 60 percent of C3S, 15 to 25 percent of C2S, 5 to 10 percent of C3A, 10 to 15 percent of C4AF, 2 to 8 percent of Ca3Mg (SiO4) 2 and 0.1 to 1 percent of 3MgO. V2O5. By introducing the vanadium-containing waste catalyst, the sintering temperature of the clinker can be obviously reduced, a 3MgO. V2O5 compound is formed, free magnesium oxide is converted into a combined stable calcium-magnesium compound, the volume-stable high-magnesium Portland cement clinker is obtained, and the autoclaving expansion rate of the cement is less than 0.01% when the content of magnesium oxide in the clinker reaches 4.5-10%.

The present invention discloses a telescopic 3D printed osteotomy surgical guide with a double locking structure, including a left plate body and a right plate body integrally formed by 3D printing, and a telescopic structure for realizing the relative telescopic extension of the left and right plates. With the osteotomy surgical guide of the present application, on the one hand, all components are integrally formed by 3D printing, and the components are mutually limited or nested, that is, the relative movement between the components is satisfied, and the mutual slippage between the components is avoided, which is beneficial to improve the safety and convenience of the surgical process. On the other hand, it has the function of telescopic adjustment, so that it is in a smaller volume state when placed in the incision, and adjusted to a larger volume state after being placed in the incision, which greatly improves the flexibility and convenience of the surgical process. After its volume deformation is completed, it can be stabilized in the working state to avoid being affected by the pulling of the maxillofacial muscles and affecting its volume and shape, ensuring the positioning accuracy, and at the same time, the double locking structure can prevent accidental unlocking.

The utility model provides a turning conveying device which comprises a machine frame, a plurality of chain plates connected end to end and a driving assembly, the machine frame comprises straight line sections at the two ends and a turning section connected with the two straight line sections, the chain plates form a chain shape to be arranged on the machine frame in a surrounding mode, the chain plates are connected with the driving assembly, and the driving assembly is connected with the driving assembly. The driving assembly drives the chain plate to move along the rack; a platform for supporting the chain plate is arranged at the upper end of the rack, a roller assembly in rolling connection with the platform is arranged at the bottom of the chain plate, a turning guide rail is arranged on the side portion of the turning section, and a turning roller in butt joint with the turning guide rail is arranged on the side portion of the chain plate. The turning conveying device can stably convey workpieces with large mass or large size, the overall length of a production line can be reduced through the turning structure, and the turning conveying device is good in structural stability and not prone to damage.

This application provides a voice gain control method, apparatus, voice control device, and storage medium, relating to the field of voice signal processing technology. The method includes: determining a target gain level for the current statistical period based on a first volume parameter of multiple frames of voice signals within a historical statistical period; and adjusting the second volume parameter of each frame of voice signal within the current statistical period based on a second volume parameter and the target gain level. This application can improve the stability of voice signal volume gain control.

The application discloses a kind of segmented hole sealing multi-tube synchronous grouting device and construction method, belong to grouting equipment technical field, including multiple grouting pipes, multiple segmented covers, multiple segmented membrane bags and multiple pressure valves;Multiple segmented covers are set on multiple grouting pipes according to preset grouting section distance interval along grouting pipe length direction;Each grouting pipe includes inlet section pipe body and outlet section pipe body, inlet section pipe body is provided with membrane bag inlet, outlet section pipe body is provided with grouting port, and the membrane bag inlet and grouting port of each grouting pipe are set according to preset grouting section distance interval;Each segmented membrane bag is located at adjacent grouting section boundary and wraps corresponding membrane bag inlet;Each pressure valve is installed inside grouting pipe and located in the pipe section covered by segmented membrane bag, and the pressure valve is configured to: when the pressure of liquid in the pipe is less than the set threshold, it is closed, and it is opened and kept irreversible opening after exceeding the threshold.The application realizes reliable segmented hole sealing, prevents grouting and multi-tube synchronous grouting, improves construction efficiency and grouting quality.

The utility model belongs to clothes cleaning device technical field especially relates to a clothes brush. A clothes brush, include: the body of rubbing, it includes the hair seat and the liquid storage seat, two splices make that the body of rubbing inside forms the liquid storage chamber, and the splicing of hair seat and liquid storage seat is equipped with sealing structure, liquid valve is located on hair seat, and the liquid valve includes: the valve body, with fixed connection of hair seat, be equipped with the liquid outlet chamber that communicates with the liquid storage chamber in the valve body, and the valve body still is equipped with the valve hole that liquid flows to the outside of the body of rubbing, the valve hole is conical, movable valve head is located in the liquid outlet chamber, movable valve head includes the sealing section that cooperates with the valve hole, the sealing section forms the taper surface that adapts with the valve hole, spring is located in the liquid outlet chamber, is used for the pre -tightening force to movable valve head, makes sealing section always close the valve hole, sponge, the head of movable valve head is covered, the utility model has the advantages that the sealing property is good, and the excess overflow of cleaning fluid can be avoided simultaneously.

The invention discloses a coke oven top platform pouring method, which comprises the following steps: carrying out light layer construction: pouring a No.2 pouring material into a construction part, vibrating the construction part by adopting a vibrating bar to remove air holes, enabling the thickness of the thinnest part to be not less than 70mm, and then trowelling; a metal reinforced grid frame is added, specifically, the metal reinforced grid frame is flatly laid on the surface of the trowelled second castable; after the light layer is hardened, a first castable is poured into the surface of the tiled metal reinforced grid frame, the water adding amount is 7-10% of the mass of the first castable, a vibrating spear is adopted for vibration compaction, and screeding is conducted after the needed construction thickness is achieved; and curing: spraying water every 1 hour for wetting, and curing at normal temperature for more than 24 hours. The invention has the innovation point that two layers of castable are compounded for use and are applied to the coke oven top to prevent rainwater from permeating into the oven body to influence the production.

The invention provides a guide expansion device for bladder and cervix ligament separation and a use method of the guide expansion device, and relates to the field of hysterectomy. The guide probe is arranged at one end of the flow guide tube; the expansion bag is made of an elastic material, is arranged at one end, close to the guide probe, of the catheter, is connected with the side wall of the catheter and is used for expanding the ureter tunnel; two ends of the connecting section are respectively connected with the guide probe and the flow guide tube; the expander is used for supplementing an expansion medium into the expansion bag or extracting an expansion medium from the expansion bag; the sleeve is arranged between the expansion bag and the expander, and the flow guide pipe penetrates through the interior of the sleeve to be communicated with the expander; a flow guide hole communicated with the interior of the expansion bag is formed in the side wall of the flow guide pipe, the expansion medium enters and exits the expansion bag through the flow guide hole, the diameter of the connecting section is not larger than that of the guide probe, and the diameter of the expansion bag in the contraction state is not larger than that of the connecting section. The device has the effect of facilitating separation of the bladder and cervix ligaments.

The invention relates to a steel ladle permanent lining ramming material. The environment-friendly ramming material is prepared from the following raw materials in parts by weight: 70-80 parts of alumina; 50 to 60 parts of brown aluminum oxide; 10 to 20 parts of mullite powder; 8-15 parts of kyanite powder; 8-12 parts of graphite powder; 5-10 parts of alumina powder; 5-8 parts of metal silicon powder; 4-6 parts of metal aluminum powder; 10-15 parts of liquid phenolic resin; and 4-10 parts of plastic clay. The mullite and the kyanite are added, so that the refractoriness and the thermal shock resistance of the ramming material can be improved, the volume of the ramming material can be stable, and the service life of a steel ladle lining is prolonged.

When a conventional sound box is designed, a large box body is often needed to ensure the low-frequency quality. The invention provides a novel sound box design method and an active volume compensation sound box. The novel sound box design method mainly comprises the steps of parameter selection of volume compensation and power distribution and design of a calculation formula. The active volume sound box comprises a box body, a main loudspeaker and at least one volume compensation loudspeaker. The internal space of the box body is divided into a closed first working area and at least one closed second working area. According to the invention, through synchronous vibration of the main loudspeaker and the volume compensation loudspeaker, the space in the second working area is positioned in the first working area, and the air volume change in the first working area is partially and even completely compensated, so that the low-frequency characteristic of the active volume compensation loudspeaker is optimized. In addition, the additionally arranged digital signal processor is used for improving sensitivity response in a frequency domain, and comprehensive and excellent tone quality and the characteristics of a small sound box body are considered.

The invention relates to the technical field of shield tunnel engineering waterproof materials, and discloses a high-resilience compressive deformation resistant shield segment sealing gasket and a preparation method thereof, and the material is prepared from a solid ethylene-propylene-diene copolymer, a reactive pre-dispersed rubber master batch, carbon black, a peroxide vulcanizing agent and the like. Wherein the masterbatch comprises carbon black, zinc methacrylate, liquid ethylene propylene diene monomer and alpha-methylstyrene dimer. According to the invention, an ion and covalent dual cross-linked network is constructed through in-situ polymerization, reactive plasticizing is realized by using liquid rubber, and the problem of volume shrinkage caused by migration of a traditional plasticizer is solved. And in cooperation with a specific pre-dispersion process, the material has excellent compression set resistance and long-term dimensional stability, and the safety and durability of tunnel sealing are remarkably improved.

The application belongs to the technical field of brick and stone cultural relics protection, and particularly discloses a metakaolin-based calcium phosphate chemical bonding mortar, a preparation method and application thereof. The mortar is composed of the following raw materials in percentage by mass: 11.0-14.0% of high-activity coarse metakaolin, 3.0-5.0% of high-activity superfine metakaolin, 13.0-17.0% of calcium dihydrogen phosphate-hydrate powder, 52.0-56.0% of mullite sand, and the balance of mixing water. Compared with the prior art, the repair material can have compatibility, safety and certain weather resistance with the brick and stone cultural relics, the molar ratio of phosphorus and aluminum of the reactant is controlled, the particle size grading of the metakaolin is adjusted, the proportion of the product crystal and amorphous structure is regulated, and then the metakaolin-based calcium phosphate chemical bonding material with a strength gradient is prepared. The setting time of the prepared material is appropriate, the shrinkage rate is low, and there is no soluble salt, so the material has high applicability for the repair and reinforcement of the brick and stone cultural relics.

The present invention discloses a body fluid collection, pretreatment and preservation device and a method for using the same. The device comprises: a sampling tube, a push cylinder sliding in the sampling tube, a filter assembly arranged at the bottom of the sampling tube, a collection tube connected to the filter assembly, and a biological sample protective agent; the filter assembly comprises: a porous polymer filter plate arranged inside the sampling tube, and a filter head connected to the lower end of the sampling tube; the device and method of the present invention can eliminate the interference of mucin, bacteria, cell debris, and oral insoluble matter / impurities at one time under low resistance, complete the initial purification process, and improve the stability of biological molecules in body fluid samples, especially metabolic molecules, under non-low temperature conditions.

The utility model relates to the technical field of electroplating, and discloses an insoluble anode pulse electroplating device and electroplating equipment, and the insoluble anode pulse electroplating device comprises a pulse power supply which is provided with a first electrode and a second electrode; the first anode structure is coated with a catalytic coating and electrically connected with the first electrode, a first unilateral diode is electrically connected between the first anode structure and the first electrode, an anode of the first unilateral diode is electrically connected with the first electrode, and a cathode of the first unilateral diode is electrically connected with the first anode structure; the second anode structure is electrically connected with the first electrode; according to the utility model, the problems that the service life of the anode is affected and the electroplating cost is increased due to the fact that hydrogen evolution corrosion occurs at the anode with the catalytic coating and the catalytic coating falls off are solved.

The invention relates to the technical field of high nickel matte pulping, and particularly discloses a high nickel matte fine grinding pulping system which comprises a horizontal ball mill, a spiral classifier and a stirring fine grinding machine. The stirring fine grinding machine is used for finely grinding ore pulp; the spiral classifier is mounted on one side of the horizontal ball mill, a discharge port of the horizontal ball mill is communicated with a feed port of the spiral classifier through a connecting pipe, and a return port of the spiral classifier is communicated with the feed port of the horizontal ball mill; according to the high matte nickel fine grinding system, the high matte nickel fine grinding system can be suitable for 3-15 mm coarse alloy particles with extremely good toughness and ductility, and efficient and energy-saving crushing and grinding can be conducted on the materials; the problem that an ore discharge port and a pipeline are blocked due to the fact that alloy is not easy to levigate in a common pulping process is solved, and operation is smooth and stable in the production process.

The invention provides a quantitative feeding mechanism for a special energy high-flux experiment. The quantitative feeding mechanism comprises a shell; a feeding hole and a discharging hole are respectively formed in the top and the bottom of the shell; the top of the feeding port fixedly communicates with a storage hopper. A rotating cylinder is installed in the shell in a matched mode. A charging barrel extending into the rotating barrel is arranged on the barrel wall of the rotating barrel, and a trough is formed in the charging barrel; an adjusting mechanism is arranged on the charging barrel and is used for adjusting the size of the trough; a driving mechanism is installed on the side wall of the shell and connected with a switching assembly. The switching assembly enables one of the adjusting mechanism and the rotating cylinder to be connected with the driving mechanism. By arranging the adjusting mechanism on the charging barrel, the size of the trough for charging and feeding can be adjusted, different requirements of experiments of different groups and different parameters on the material feeding amount in the special energy high-flux experiment can be met without replacing feeding components with different volumes, and the experiment efficiency is greatly improved.

The utility model discloses a multifunctional limestone lifting conveying belt, including base, the rim fixedly connected with apron at base top, the side wall of base top end is the inclined structure, one side fixedly connected with the link box of base, the link box is the hollow structure, and inside detachable connection has the conveying belt, and the interval groove that is established has between the conveying belt and base, the outside side wall of conveying belt evenly fixedly connected with the collection board, and the top of collection board is established with the anti -fall board, the utility model has the following advantages: because the anti -fall board is connected on the collection board, and the anti -fall board is connected with the collection board through the pivot and the torsional spring, thereby the anti -fall board will block in the top of collection board under the action of torsional spring, thereby the limestone in collection board is restricted, reduces the limestone drop rate in the process of lifting, guarantees single -time lifting transportation capacity is relatively stable, thereby improves the efficiency of transportation.

The present application provides a combined antenna and an intelligent parking management system, wherein the combined antenna comprises an antenna housing, a WIFI omnidirectional antenna, a GPS / BDS active antenna, and a 4G omnidirectional antenna; the antenna housing is provided with an antenna outlet hole and a mounting structure; the WIFI omnidirectional antenna, the GPS / BDS active antenna, and the 4G omnidirectional antenna all comprise a circuit board, a cable, and a connector; the inner conductor at one end of the cable is electrically connected to the feed connection of the circuit board, the outer conductor is electrically connected to the ground connection of the circuit board, and the other end of the cable is electrically connected to the connector.

The present specification discloses a multi-view X-ray inspection system having, in one of several embodiments, a three-view configuration with three X-ray sources. Each X-ray source rotates and is configured to emit a rotating X-ray pencil beam and at least two detector arrays, where each detector array has multiple non-pixellated detectors such that at least a portion of the non-pixellated detectors are oriented toward both the two X-ray sources.

The utility model relates to the technical field of fermentation of clostridium tetani, in particular to a cooling recovery device for reducing volatilization of fermentation liquor on a fermentation tank, which comprises the fermentation tank and a condensation recovery device, the condensation recovery device is obliquely arranged above the fermentation tank; the condensation recovery device comprises an external stainless steel shell and an internal thin stainless steel pipe, the stainless steel shell is hermetically connected with the outer wall of the internal thin stainless steel pipe, and a space for storing cooling water is formed between the stainless steel shell and the internal thin stainless steel pipe; the lower end of the thin stainless steel pipe is communicated with the fermentation tank; and fermentation liquor steam circulates in the thin stainless steel pipe. According to the utility model, through the condensation recovery device, fermentation liquor steam generated in the fermentation process can be effectively captured and condensed, so that the volatilization loss of fermentation liquor is reduced; the consumption of raw materials can be reduced, so that the overall production cost is reduced; in addition, due to the fact that volatilization of the fermentation liquor is reduced, the volume of the fermentation liquor in different batches is more stable, and consistency and repeatability of the fermentation process can be guaranteed.

The utility model discloses a kind of air outlet pipe assembly of soft and hard tube combination as resonant cavity, belong to engine intake system technical field, for solving the problem of traditional air cleaner air outlet pipe resonant cavity structure complexity, process is complicated and big mould investment. The assembly includes corrugated hose, hard tube, clamp and rubber sleeve;Hard tube one end is inserted into hose, and sealing resonant cavity is formed by clamp holding and fixing, and the other end of hard tube is equipped with rubber sleeve to connect supercharger;Hose outer peripheral wall is provided with corrugated structure to realize decoupling, and hard tube outer wall is integrated with air supply pipe joint and venturi pipe joint. When working, airflow passes through resonant cavity, attenuates noise by cavity resonance, corrugated structure absorbs vibration, integrated joint meets the functional requirement of whole vehicle, and rubber sleeve realizes sealed connection with supercharger. The utility model replaces traditional welding plastic piece cavity by soft and hard tube combination and clamp connection, saves welding process and additional rubber pipeline, simplifies structure, reduces mould investment, reduces cost, while realizing noise reduction and decoupling function.

The application provides application of desalted plant ash in protection of cultural relics in grotto temples. The application also provides a mixed mortar for reinforcement of the cultural relics in the grotto temples and a preparation method thereof. The multi-scale fiber reinforced mixed mortar provided by the application has mechanical properties matched with the protection requirements of the cultural relics in the grotto temples, low shrinkage, good acid resistance and salt resistance, and can cope with various adverse environmental factors such as dry-wet changes, crack water seepage, acid rain, salt crystallization damage and the like in the preservation of the cultural relics in the grotto temples. The preparation method is simple, raw materials are economical and easy to obtain, and the product is light and flexible. The application can solve the problem of insufficient anti-cracking capacity of the existing protection materials for the cultural relics in the grotto temples, improve the safety and durability of the cultural relics in the grotto temples, and has a comprehensive protection effect.

The present invention discloses a method for preparing a folding-resistant toughened flame-retardant alloy tile material, which belongs to the technical field of flame-retardant polymer materials. Saturated polyester is used to coat titanium carbide particles to form a volume-enhanced coated titanium carbide, which can effectively prevent the generation and expansion of microcracks inside the alloy tile material, play a role in crack pinning, and thus have a toughening effect on the alloy tile material. At the same time, saturated polyester is used for coating, and titanium carbide is evenly dispersed in the alloy tile material to avoid titanium carbide agglomeration. Saturated polyester and PET can be melt-blended and extruded, so that titanium carbide is evenly dispersed in the alloy tile. A layer of saturated polyester is coated on the surface of titanium carbide by a chemical coating method, which can effectively improve the wettability between titanium carbide and PET. Further, PET / PP blending is used to improve the folding fatigue resistance of PET. The alloy tile has the advantages of corrosion resistance, aging resistance, high light transmittance, beautiful molding, low cost, etc.

The gluten food winding mechanism comprises a winding cylinder, a mounting body, a pushing rod, a first air cylinder, a feeding port and a sliding block, the sliding block is slidably connected with the mounting body, a pushing hole and a feeding hole are formed in the mounting body, a receiving hole is formed in the sliding block, and the side, extending out of the mounting body, of the sliding block is fixedly connected with a pushing rod of a second air cylinder; when the second air cylinder extends out, the material receiving hole is communicated with the material pushing hole; one end of a pushing rod is slidably connected into the pushing hole, and the other end of the pushing rod is hinged to a pushing rod of a first air cylinder. When the material receiving hole is communicated with the material pushing hole, a push rod of the first air cylinder stretches out to drive the material pushing rod to push materials in the material receiving hole out of the material pushing hole, the lower end of the material pushing hole is connected with a winding barrel in a penetrating mode, and a winding rod driven by a motor is rotationally connected into the winding barrel. According to the structure, gluten cutting and gluten winding are integrated. The materials are cut according to the length of the material receiving hole and are wound by the winding cylinder, so that the processed gluten is stable in volume, and the shape is also controlled.

The invention discloses a connector technology, and aims to provide a four-core beam-expanding oil-filled optical fiber connector and an assembling method thereof. According to the technical scheme, the oil-filled plug is characterized by comprising a threaded sleeve, a plug shell, a four-optical-fiber beam expanding insulator, a pressure compensator, an oil-filled plug tail clamp, a sealing assembly and a calibration gasket which is clamped between the butt joint end faces of the oil-filled plug tail clamp and the plug shell and used for adjusting the pre-compression stroke of the pressure compensator. The screw sleeve, the plug shell, the four-optical-fiber beam expanding insulator, the pressure compensator, the oil-filled plug tail clamp, the sealing assembly and the calibration gasket jointly define a completely-closed oil-filled cavity, fluorinated oil or synthetic hydrocarbon oil subjected to degassing treatment is injected into the oil-filled cavity through a valve, and the oil-filled cavity is matched with the pressure compensator to construct an active pressure compensation sealing system. The invention is suitable for the technical field of connectors.

The utility model relates to the technical field of pressure casting sprayers, in particular to a connecting rod type sprayer for pressure casting, which comprises a pneumatic control box, a connecting rod mechanism, a translation mechanism and an atomizing mechanism, and the atomizing mechanism comprises a lower shell, a splitter plate, a plurality of electromagnetic valves, two pneumatic control valves, a plurality of atomizing nozzles and a plurality of quick drain valves. When atomization demolding is carried out, spraying and demolding are carried out through a plurality of atomizing nozzles, and through the arrangement of a plurality of quick drain valves, the situation that water enters a two-position five-way valve and the two-position five-way valve is damaged when an air source and the plurality of atomizing nozzles are damaged and return water enters the two-position five-way valve can be prevented, so that the device adopts a plurality of inner diameters to enlarge the pipe diameter, the air quantity is stable and the pressure drop is low in the spraying process; the mold release agent has the advantages of simple structure, strong explosive force, excellent atomization effect, double release agent consumption cost, double operation speed and double service life. And as the atomization effect is good, the use amount of the release agent is small.