213results about How to "Realize repeated use" patented technology

The invention discloses a biomass-based nanometer lanthanum oxide dephosphorization composite adsorbent and a preparation method thereof. According to the composite adsorbent, biomass anion exchange resin is taken as a matrix, and nanometer lanthanum oxide is loaded on the biomass anion exchange resin; the load of the nanometer lanthanum oxide is 0.5 to 22.6 percent by weight percentage of lanthanum; the biomass anion exchange resin is alkali quaternary ammonium group-contained biomass anion exchange resin, and is prepared by performing aminated modification on a biomass material by taking N,N-dimethylformamide as solvent, epichlorohydrin as an etherifying agent and trimethylamine or triethylamine or urea as an aminating agent; the biomass material is selected from maize straw, soybean straw, cassava straw, rice straw, wheat straw, bamboo reed, saw dust or a mixture thereof. The composite adsorbent disclosed by the invention is low in cost and high in adsorption capacity.

Disclosed are a self-travelling diamond-shaped pin-connected truss-type form traveler structure and a form traveler travelling and constructing method. A form traveler is mainly composed of a main truss system, a horizontal connection system, an internal formwork system, an external formwork system, a bottom formwork platform system, a hanging system, an anchoring system and a travelling system. The main truss system is composed of two main trusses and horizontal bracings, and each single main truss is composed of a lower chord, an upper chord, a diagonal rod and a vertical rod which are connected into a whole via single-hole bolt pins through joint boxes. The two main trusses are connected by the spacing-adjustable horizontal bracings. A rear anchoring system is connected to the rear of the lower chords of the main trusses. The travelling system comprises a section rail located under the main trusses, a left-handed wheel, rollers, a travelling pushing jack and the like. The self-travelling diamond-shaped pin-connected truss-type form traveler structure is quick to install, the spacing between the main trusses and the positions of hanging rods can be adjusted according to the section forms of different box girders on the basis that load bearing is satisfied, the optimal stress state is formed, universality is high, turnover rate of the form traveler is increased greatly, project cost is saved, and economical benefit is obvious.

The invention discloses an ethylenediamine perchlorate.triethylene diamine perchlorate eutectic initiating explosive and a preparation method thereof. The initiating explosive is a eutectic compound of ethylenediamine perchlorate and triethylene diamine perchlorate, can be initiated under the action of outside excitation energy and has better explosion output power. The preparation method is as follows: the eutectic compound of the ethylenediamine perchlorate and the triethylene diamine perchlorate is prepared by the neutralization reaction through using ethylene, triethylene diamine and perchloric acid as raw materials under the solution state, wherein the molecular ratio of the ethylenediamine perchlorate and the triethylene diamine perchlorate in the prepared eutectic compound is 1:1. The invention has the advantages of small moisture absorption, large explosion power, simple manufacture process, energy saving, consumption reduction, and no harm to environment.

The invention belongs to an extrusion type servo system and in particular relates to a novel high-pressure air charging nozzle. The invention provides a novel high-pressure air charging nozzle which is specially designed for an extrusion type servo system and has good sealing performance at the reverse blocked state and can ensure that no air leaks at the nozzle after air is charged. The invention adopts the technical scheme that the novel high-pressure air charging nozzle comprises a one-way valve, a spring, a one-way valve core, a shell, a plugging cap, a protective retainer ring, an O-shaped seal ring and a circlip for a hole, wherein the shell is a hollow tubular body; the plugging cap is arranged at the right end of the shell; a one-way valve support, the spring and the one-way valve core are disposed inside the shell; and the one-way valve support is connected with the one-way valve core through the spring.

The invention relates to a preparation method for cationic-type activated carbon. The preparation method comprises the steps of washing, drying and crushing activated carbon, and oxidizing the activated carbon by concentrated hydrochloric acid or sulfuric acid so that the surface of the activated carbon has hydroxy; heating to the temperature of 80-87 DEG C under the condition of water bath, then adding epoxy chloropropane and N-N dimethylformamide, and stirring and reacting for 0.5-1.5h; and adding ethanediamine to react for 1-1.5h, then continuously dripping triethylamine to react for 0.5-1h, cooling to room temperature, and washing and drying so as to obtain the cationic-type activated carbon. An activated carbon product is the cationic-type activated carbon with positive charges, has a cationic group and a hydroxyl group, further has biodegradability, and is applicable to removing anionic-type pollutants in water.

The invention relates to a pipe pile water curing method. In the method, a water storage tank is arranged, and condensate water and residual steam in a still kettle are guided into the water storage tank; a pipe pile is placed in a steaming and curing pool, the condensate water in the water storage tank is guided into the steaming and curing pool, and the residual steam in water storage tank is guided into the steaming and curing pool; and steaming and curing the pipe pile in the steaming pool for 4-5 hours at 80-90 DEG C. The curing device comprises the steaming and curing pool, the water storage tank and the still kettle, wherein the steaming and curing pool is provided with a water-steam port; the water storage tank is provided with a residual steam outlet, a residual steam inlet, a condensate water outlet and a condensate water inlet; and the still kettle is provided with a steam inlet and a steam outlet. A condensate channel is arranged between the water-steam port of the steaming pool and the condensate water outlet of the water storage tank, and a steam channel is arranged between the water-steam port of the steaming pool and the residual steam outlet of the water storage tank. The condensate water inlet of the water storage tank is communicated with the condensate water outlet of the still kettle through a third electric control valve and a pipeline, and the steam inlet of the water storage tank is communicated with the steam outlet of the still kettle through a second steam valve and a pipeline.

The invention relates to application of adsorbed-desorbed waste biochar in degrading persistent organic pollutants by activating persulfate, which comprises the following steps: by using the adsorbed-desorbed waste biochar as a catalyst, adding the adsorbed-desorbed waste biochar into organic pollutant wastewater, and adding the persulfate to degrade the persistent organic pollutants in the wastewater. According to the method, a new idea is provided for reutilization of the biochar after heavy metal ion adsorption, secondary pollution of the waste biochar after heavy metal adsorption is avoided, the solid waste disposal pressure is relieved, and the environment is protected. According to the method, the waste biochar is better recycled, resources are saved, the waste biochar is high in chemical stability and low in metal ion dissolution rate, the persulfate activating capacity is high, waste is turned into wealth, recycling can be achieved, and the waste biochar is used for treating the wastewater containing the organic pollutants through the heterogeneous persulfate oxidation technology and has broad application prospects. Organic matter removal rate is high.

The invention discloses an automatic circulation screen filter device for a blow-molding melt. The automatic circulation screen filter device comprises an external circular filtering plate, an internal circular filtering plate, a filter screen, a melt-supplying cavity, a melt-discharging cavity, two cooling water pipes and a cleaning device, wherein the filter screen is disposed between the external circular filtering plate and the internal circular filtering plate; the melt-supplying cavity and the melt-discharging cavity are disposed at two sides of the filter screen; the cleaning device is disposed at one side of a filter screen ring; and the cooling water pipes are respectively disposed on flanged cylindrical surfaces, adjacent to the filter screen, of the melt-supplying cavity and the melt-discharging cavity. The circular filter screen is used in the automatic circulation screen filter for the blow-molding melt and driven to move in a circular filtering plate tank by the rotation of a cleaning felt shaft of the cleaning device so as to complete the filter screen replacement. The replacement of the filter screen needs no stop and is continuous, and therefore, the flow velocity and pressure of charged materials and discharged materials change slightly, and the unqualified products are reduced as well as the production efficiency is improved. In addition, the filter screen can be recycled after being cleaned automatically, thereby saving materials and time.

The invention discloses a technological method for preparing single optically pure L-tertiary leucine by using leucine dehydrogenase as a biocatalyst, specifically comprising the following steps of: adding substrates trimethylpyruvic acid, ammonium formate and leucine dehydrogenase as well as a hydrogenlyase-mediated coenzyme cyclic regeneration system into a reaction solution, oscillating or stirring, heating the reaction system after the reaction, filtering or centrifuging to remove denatured protein, removing a solvent, filtering to obtain the product L-tertiary leucine and a filtrate containing a small amount of L-tertiary leucine, and recycling the filtrate for the next round of reaction, wherein the reaction temperature is 15-50 DEG C. By the use of leucine dehydrogenase and with the cooperation of the coenzyme cyclic regeneration system, L-tertiary leucine is prepared by a recycling technology. The concentration of the substrate reaches up to 2.0 M. The required coenzyme NAD+ or NADH has low concentration and can be recycled for many times so as to ignore the cost of the coenzyme. The method provided by the invention has an important application value.

The invention discloses a device and method for flue gas cleaning by combining an impact agglomeration wet dust collector with a wet electric dust collector. Specifically, the impact agglomeration wet dust collector and a gas-flow uniform distributing device are arranged under the tube-type wet electric dust collector, and the whole device is composed of a two-way gas-intake pipeline, an impact chamber, an efficient demister, a gas-flow uniform distributing plate, the wet electric dust collector, an alkali liquor pool, a precipitation liquor pool, a mixed liquor pool and the like. Flue gas processed through wet desulphurization impacts the liquor level in the impact chamber under the wet electric dust collector and arouses a large amount of water mist; meanwhile, two strands of the flue gas with the water mist is fully impacted and mixed over the liquor level, agglomeration growth of submicron fine particulate matter in the flue gas is facilitated, and precleaning of the flue gas is achieved. According to the device and method, the mode of combining the impact agglomeration wet dust collector with the wet electric dust collector is adopted, the problem that a traditional wet electric dust collector is lower in removing efficiency of the submicron fine particulate matter, and deep cleaning of the flue gas processed through wet desulphurization is achieved.

The invention relates to a method for preparing conotoxin polypeptide Eb1.6. The method comprises the following steps of: 1) synthesizing Eb1.6 linear peptide by using a condensing agent N,N'-diisopropylcarbodiimide / 1-hydroxybenzotriazole (DIC / HOBt); and 2) folding the linear peptide to obtain the conotoxin polypeptide Eb1.6. According to the method, the efficiency of the manual synthesis of the linear peptide is improved by using the condensing agent DIC / HOBT; an MNH4HCO3 buffer solution with the pH value of 8.0 and the concentration of 0.1 is selected as a folding buffer solution, is cheap and readily available, and is high in folding rate; a product obtained by the folding is adsorbed by using AmberliteXAD16 macroporous adsorption resin, the resin is dipped by using ethanol, a dipping solution is concentrated, and then an obtained product can be directly used for the subsequent C18 column purification; and meanwhile, the resin washed by using the ethanol is washed by using water and is regenerated, so that the recycling of the buffer system and the resin can be realized, the recovery rate is relatively high, and the cost is reduced.

The invention relates to a water curtain type air purifier, which mainly comprises a splash-proof net, an upper water tank, a guide pipe, a control valve, a water inlet pipe, a lower water tank, a water outlet pipe, a motor, a water pump, a suction pipe, a drainage pipe, a drainage valve and the like. The main operating process is that water is lifted to an upper end of a window by the water pump, flows from the upper water tank to the lower water tank of the window along the guide pipe by utilizing dead weight and is lifted to the upper water tank of the window by the water pump so as to finish a cycle. The device has a good air purification effect, has functions of removing dust, humidifying air, regulating the room temperature and the like, is particularly suitable for households, work places and the like, and is low in price, and convenient to use, clean and mount.

The invention provides a low-rank coal low-temperature dry distillation pyrolysis process at the aim of existing problems of resource waste, high energy consumption and a large amount of pollution discharge of low-rank coal including lignite and the like. The process adopts an improved multistage furnace as carbonization equipment, gas obtained from low-rank coal material subjected to pyrolysis and oil extraction as a circular heat carrier, and the low-rank coal is subjected to drying, preheating, carbonization, pyrolysis, tar extraction and semicoke production. According to the process, the low-rank coal including the lignite is conveyed to a multistage furnace via a hopper above the multistage furnace, under the pushing action of the harrow teeth in the multistage furnace, the material is uniformly pushed and turned on a furnace layer surface, and is lowered from a drying section, a preheating section, a carbonization section and a cooling section in sequence; via the drying, preheating, dry distillation pyrolysis, thermal oil gas and semicoke are obtained; the thermal oil gas upwards flows through the preheating section, the drying section and a diffuse section and then is exhausted out of the multistage furnace, tar and gas are obtained via extraction, and the gas is reused as a heat carrier. As a result, the scientific and comprehensive application of the low-rank coal is achieved.

The invention relates to the field of soil remediation, in particular to a soil screening device for soil remediation. The device comprises a crushing cylinder, a motor, a stirring block, an elastic grinding piece, a screening and filtering assembly and a transmission shaft. The transmission shaft is vertically arranged in the crushing cylinder and is driven by the motor to rotate; the elastic grinding assembly comprises a fixed outer ring, a fixed inner ring and a plurality of elastic strips, the fixed outer ring is fixed to the crushing cylinder, and the fixed inner ring is located below the fixed outer ring and smaller than the fixed outer ring; the upper end of each elastic strip is connected with the fixed outer ring, the lower end of each elastic strip is connected with the fixed inner ring, and the projection of each elastic strip in the horizontal plane is spiral; the stirring block is installed on the transmission shaft and located in an annular space defined by the elastic strips, the stirring block interacts with the elastic strips when rotating along with the transmission shaft to crush blocky soil, the elastic strips are made to extend under extrusion of the blocky soil, then the fixed inner ring is made to rotate, and partial or complete contraction is recovered when the pressure is reduced or disappears; and the screening and filtering assembly is used for receiving and filtering the crushed blocky soil.

The invention relates to a building formwork, which comprises surface formwork units and a frame structure, wherein the surface formwork units are paved on the surface of the frame structure; connecting ribs are respectively arranged on two sides along a longitudinal direction of formwork bodies of the surface formwork units; a bulge is arranged on the connecting rib on one side; a slot is correspondingly formed on the connecting rib on the other side; reinforcing ribs are arranged along the longitudinal direction of the formwork bodies; the reinforcing ribs and the connecting ribs are located on the same sides of the surface formwork units; the frame structure comprises a longitudinal connecting rod and a lateral connecting rod; the longitudinal connecting rod is arranged on the lateral connecting rod; the surface formwork units are arranged on the surface of the longitudinal connecting rod; the longitudinal connecting rod is at least locally embedded between the reinforcing ribs and / or between the reinforcing ribs and the connecting ribs of the surface formwork units; and adjacent surface formwork units are tightly connected to each other by the correspondingly arranged bulge and slot on the connecting ribs and are fastened by a U-shaped buckle. The building formwork has the advantages of less steel usage, high practicability, high splicing efficiency, easiness in operation, economical and environmentally-friendly properties, excellent stability and evenness, capability of effectively preventing slurry leakage, and wide market prospect.

The invention belongs to the technical field of oligosaccharide preparation, and relates to a continuous cyclic preparation method of a high-purity lactulose solution and a product thereof. Specifically speaking, the preparation method comprises the following steps: (1) performing lactulose isomerisation; (2) performing acidity adjustment; (3) diluting, dispersing and separating; (4) purifying clear lactulose liquid; (5) performing cyclic utilization of a catalyst. Through the preparation method, high-concentration lactulose solution and a subsequent product thereof can be prepared. Accordingto the continuous cyclic preparation method of the high-purity lactulose solution and the product thereof, sodium metaaluminate / an alkaline matter is taken as an alkaline complexing catalyst for the first time in China, and the conversion rate and lactulose concentration achieved by preparing the lactulose by taking the sodium metaaluminate / an alkaline matter as the alkaline complexing catalyst are far higher than those achieved by adopting a boracic acid / sodium hydroxide system; repeated cyclic use of a sodium metaaluminate catalyst is realized; the defect that precipitate wraps the lactuloseis overcome. The preparation method provided by the invention meets resource-saving and environment-friendly production requirements, and provides beneficial experience and reference for promoting clean, high-efficiency and environment-friendly lactulose industrial production.

The invention relates to a switching control valve for the state of an aircraft cargo compartment fire extinguishing system, and the switching control valve is particularly suitable for serving as a diversion element of extinguishing agents in an aircraft cargo compartment fire extinguishing pipeline. A flow control device comprises a valve body (1), a high-speed inlet (2) and a low-speed inlet (3), wherein a sliding type valve element (4), a valve cavity (5), a valve base (6) and an elastic force control switch (7) are arranged in the valve body, a slider (8) is arranged on the periphery of the sliding type valve element (4), a conical-angle face (9) is arranged at one end, close to the low-speed inlet (3), of the valve base (6), and a drying filtering cavity (10) and a throttling cavity (11) are formed in the valve cavity (5). The switching control valve meets different flow speed requirements and different requirements for extinguishing agents when fire happens to an aircraft, the using number of pipelines in the aircraft is reduced, the stability and the high efficiency of the fire extinguishing system of the aircraft are guaranteed, water, solid particles and other impurities in the extinguishing agents can be removed, and icing and blocking are avoided.

The invention provides a study aid for British and American literature education and teaching, and relates to a teaching device. A groove is formed in the front side surface of a comparison study plate; a word group collocation comparison study device movably connected with the comparison study plate is arranged on the inner bottom surface of the groove; an opening is formed in one side of the groove formed in the comparison study plate; and a shielding plate and a writing plate which are glidingly matched with the groove are sequentially arranged in the opening position of the groove from inside to outside. By using the study aid, the comprehensive and diversified display of the collocation of one verb and a plurality of preposition can be realized; the study aid helps students remember the verbs and all prepositions capable of being collocated with the verbs; in addition, practical teaching on English tenses can also be performed; the systematic and regular display of relevant changesentence patterns of 16 tenses of English can be realized; the study aid is favorable for integrally learning all tenses of English by the students; the interactive study between teachers and students and between students is realized; and the English study interestingness is greatly improved.

The invention relates to an iron-chromium-aluminum-based porous metal material and a preparation method thereof. The material comprises through-holes having a pore size of 500nm-40um. The iron-chromium-aluminum-based porous metal material is prepared from the following raw materials: aluminum powder, chromium powder, iron powder, silicon carbide and rare earths. The preparation method of the iron-chromium-aluminum-based porous metal material comprises the following steps: firstly, carrying out vacuum sintering silicon carbide powder, rare earth and iron powder to obtain iron-silicon carbide sintering blocks containing rare earth, smelting the iron-silicon carbide sintering blocks, aluminum ingots, chromium powder and balance iron powder together under the protection of argon to obtain iron-chromium-aluminum-based alloy ingots, crushing the alloy ingots, carrying out vacuum ball milling to obtain alloy powder and finally uniformly mixing alloy powder, a pore-forming agent and a binder, carrying out compression molding and sintering to obtain the iron-chromium-aluminum-based porous metal material. The material has the advantages of long service life at high temperature and the like and furthermore, the large-scale industrialization can be achieved by the preparation method.

The invention discloses a method for preparing a charged path based on surface charge printing and performing biological droplet transfer, electrostatic copying and micro-nano self-assembly, which belongs to the technical field of numerical control printing systems. The method comprises the steps that a material with super-hydrophobic properties is placed on a moving platform, and a micro-dropletnozzle is used to drip water onto the super-hydrophobic surface of the material; the drip height of the droplet nozzle and the moving path of the platform are simultaneously controlled to print the charged path with a charge density gradient on the surface of the material. Bio-liquid transfer is performed by using the formed charged path with the charge density gradient, and electrostatic copyingand micro-nano self-assembly are performed based on surface charge printing. According to the invention, water droplets are used to impinge and contact the material with the superhydrophobic surface to electrify the material; the charged path with the charge density gradient is printed by controlling the water droplet ejection height and the platform moving path, which is simple in operation, simple in equipment and low in cost; and the entire printing process does not require an external power supply, which prevents security risks.

A myeloperoxidase modified electrode for effectively catalyzing organic reaction is prepared for utilizing molecular assembling film technique to fix trace amount of myeloperoxidase on electrode under electrostatic action, using obtained myeloperoxidase modified electrode as operation electrode and using chemical means to generate hydrogen peroxide at home position for greatly raising conversion efficiency of organic chemical reaction.

The invention discloses a near-infrared long-afterglow luminescent material having photo-stimulated luminescence. The near-infrared long-afterglow luminescent material has a molecular formula of ABO3: Mnx, Rn and in the molecular formula, A represents La, Y or Gd, B represents Al or Ga, R represents one of rare earth elements, germanium, titanium, silicon, zirconium, cobalt, nickel, tin, chromium and iron, x is greater than or equal to 0.0001mol% and less than or equal to 50mol%, and n is greater than or equal to 0mol% and less than or equal to 50mol%. The invention also discloses a preparation method and a use of the near-infrared long-afterglow luminescent material having photo-stimulated luminescence. The near-infrared long-afterglow luminescent material having photo-stimulated luminescence has photo-stimulated luminescence and photo-stimulated long-afterglow luminescence, realizes recycle of the long-afterglow materials and can be used for biological fluorescence labeling imaging well.

The invention relates to a reversing cleaner for a glass curtain wall cleaning system. The reversing cleaner comprises a chassis as well as a cleaning mechanism (30), wheel mechanisms, a battery II (29), a control mechanism II (31) and a propeller (28) which are mounted on the chassis, wherein each wheel mechanism comprises a wheel set (12) and a telescopic mechanism I (12) mounted on the chassis (3), and the telescopic mechanisms I (12) can drive the wheel sets to move vertically; the cleaning mechanism comprises a water tank (301), a sprinkler (302) connected with the water tank and a scrubbing device (303). The cleaner can walk freely in front and back directions and moves reversely directly after cleaning of one cleaning path when turning around is needed, and then the direction of a cleaning robot is adjusted, so that cleaning efficiency is greatly improved.

The invention discloses a liquid crystal display device and application thereof. The liquid crystal display device comprises two or more flexible conducting layers and glue layers clamped between thetwo or more flexible conducting layers and containing cholesteric liquid crystal. At least one of the two or more flexible conducting layers is a transparent flexible conducting layer. When the two ormore flexible conducting layers are both the transparent flexible conducting layers, a light absorption layer is arranged on the side, close to the corresponding glue layer, of any one of the flexible conducting layers; and when only one of the flexible conducting layers is the transparent flexible conducting layer, the light absorption layers are arranged on the sides, close to the correspondingglue layers, of the nontransparent flexible conducting layers. The liquid crystal display device provided by the invention has the advantages of being low in driving voltage, capable of flexibly displaying and being repeatedly used and the like, and is suitable for the field of electronic paper.

The invention discloses a two-degree-of-freedom atomic interference gyroscope. The two-degree-of-freedom atomic interference gyroscope comprises an atom preparation module for preparing a magneticallyinsensitive atomic group and vertically throwing the prepared atomic group upward; an atomic interference module for acting Raman light on the atomic group when the atomic group is thrown to an interference area, so that the atomic group is split toward two coaxial directions, respectively reflecting beams in two directions and respectively making the beams reflected in two directions overlap with the original atomic group, wherein the reflected beam in each direction is overlapped with the original atomic group to form atomic interference in the direction, and then simultaneous interferenceof the atomic group in the two directions is realized; and an atomic detection module for detecting the atomic group subjected to the simultaneous interference in the two directions by using the Ramanlight, respectively selecting the numbers of atoms in a preset momentum state in the two directions, and determining the rotating speeds in the two directions at the same tie by using the numbers ofthe atoms in the preset momentum state in the two directions. The two-degree-of-freedom atomic interference gyroscope disclosed by the invention realizes two-axis simultaneous interference, and simultaneously realizes the measurement of the two-axis rotating speed.

The invention relates to the field of soil remediation, in particular to a crushing and repairing device for heavy metal soil. The device comprises a motor, a transmission shaft, an upper elastic grinding assembly, a lower elastic grinding assembly, a screening and filtering assembly and a sliding column. The upper elastic grinding assembly comprises an upper fixing outer ring, a plurality of upper elastic strips and an upper fixing inner ring, and the upper fixing outer ring is fixedly installed; the upper ends of the upper elastic strips are connected with the upper fixing outer ring, the lower ends are connected with the upper fixing inner ring, and the spiral direction of the projection in the horizontal plane from inside to outside is opposite to the rotating direction of the transmission shaft; the lower elastic grinding assembly comprises a lower fixing outer ring, a plurality of lower elastic strips and a lower fixing inner ring, and the lower fixing outer ring is rotatably arranged; the inner end of the sliding column is connected with the upper fixing inner ring, and the outer end is vertically slidably mounted on the lower fixing outer ring; the upper ends of the lower elastic strips are connected with the lower fixing outer ring, the lower ends are connected with the lower fixing inner ring, and the lower elastic strips and the upper elastic strips are opposite in rotation direction; stirring blocks are arranged in spaces defined by the upper elastic strips and the lower elastic strips; and the screening and filtering assembly is used for receiving and filtering the crushed soil.

The invention discloses a detachable automatic suction injector which comprises a needle head, a needle tube and a piston rod, wherein the needle tube is provided with a baffle ring; the piston rod is provided with a pressing shank; the baffle ring encircles the needle tube by a round; the width of the baffle ring extending to the surround is consistent; the pressing shank is of a circular shape around the piston rod serving as a circle center; an air bag is arranged between the pressing shank and the baffle ring; two ends of the air bag are respectively provided with an upper end connection device and a lower end connection device; the upper end connection device is detachably connected with the pressing shank; the lower end connection device is detachably connected with the needle tube; an inflating nozzle and a deflating nozzle which are used for inflating and deflating the air bag are arranged on the surface of the air bag. By inflation on the air bag, the piston rod can be pushed to move, so that the needle head can suck liquid; automatic control is realized; the upper end connection device, the lower end connection device and the air bag can be detached from the injector and also assembled on the injector, so that circulating utilization is realized, and the utilization rate of resources is increased.

The invention discloses a heat pipe waste heat recovery energy-saving device. The device comprises a horizontal boiler, an energy-saving device body, a smoke tube, a dust removal device, a chimney, a constant temperature soft water pool, a make-up pump, a hot water pump, a stand-by pump and a bypass valve. The horizontal boiler is connected with the energy-saving device body through the smoke tube. A smoke vent of the energy-saving device body is connected with the chimney through the smoke tube. The constant temperature soft water pool is connected with the energy-saving device body through two pipelines, a water tank in the horizontal boiler is connected with the constant temperature soft water pool through two pipelines, and the two parallel connection pipelines are connected with the constant temperature soft water pool through a pipeline ultimately. According to the heat pipe waste heat recovery energy-saving device, the energy-saving device with a built-in heating pipe is designed in the entire system for use, hence, waste heat can be recycled, and the heating energy-saving effect of the horizontal boiler in the prior art is achieved indirectly.

The invention discloses a true triaxial fracturing test device, which comprises a loading assembly, a fracturing pipe and an injection pump. The fracturing pipe comprises a first connector, an adapterpipe and a second connector, which are communicated. The first connector is embedded in a fracturing hole in a test sample, one end close to the test sample is fixedly connected with a first fracturing pipeline, and the other end is detachably connected with the end portion of the adapter pipe; the other end of the adapter pipe is detachably connected with the second connector; the end portion ofthe second connector is fixedly connected with a second fracturing pipeline; and the other end of the second fracturing pipeline is communicated with the injection pump. The test device is fast and convenient to assemble and disassemble, can be reused and meets the requirement of arranging fracturing shafts on different side surfaces of the test sample simultaneously.