163results about How to "High reusability" patented technology

The invention relates to the technical field of hydrometallurgy, and particularly discloses preparation methods of ultralow-potassium ammonium molybdate and ultralow-potassium derivatives thereof. The preparation method of the ultralow-potassium ammonium molybdate comprises the following steps that S1, roasted molybdenum concentrate is subjected to primary screening, smashing and re-screening, and a raw material is obtained; s2, adding the raw materials and pure water into a reaction kettle, uniformly mixing, adding an acid solution, adjusting the pH value, introducing compressed air, heating, adjusting the pressure in the kettle, cooling and depressurizing, washing, and carrying out solid-liquid separation to obtain hydrated molybdenum trioxide; s3, mixing molybdenum trioxide hydrate with an ammonia water solution, adding ammonium sulfide, mixing for 1-2 hours, carrying out solid-liquid separation, then adding an adsorbent, mixing for 1-2 hours, cooling, aging for 24-48 hours, and carrying out solid-liquid separation to obtain an ammonium molybdate solution; and S4, concentrating the ammonium molybdate solution according to the specific gravity, and then carrying out cooling crystallization, solid-liquid separation, washing and drying to obtain the ultralow-potassium ammonium molybdate. The ammonium molybdate and the derivatives thereof prepared by the invention have relatively low content of potassium.

The invention discloses application of a magnetic nano composite material as an adsorbent in removal of organic dye in water, and belongs to the technical field of application of composite materials, the magnetic nano composite material (one of Fe3O4-coated TAPT-OMePDA or Fe3O4-coated TAPT-TFPDA) as the adsorbent adsorbs the organic dye in water, the adsorption capacity of Congo red (CR) reaches up to 1603.54 mg / g and 1968.83 mg / g, and the adsorption capacity of the magnetic nano composite material (one of Fe3O4-coated TAPT-OMePDA or Fe3O4-coated TAPT-TFPDA) as the adsorbent adsorbs the organic dye in water. The adsorption of the two adsorbents to the CR accords with a quasi-secondary kinetic model and a Langmuir isotherm model, and belongs to single-layer chemical adsorption. Compared with an adsorbent in the prior art, the Fe3O4 (at) TAPT-OMePDA and the Fe3O4 (at) TAPT-TFPDA have the advantages that the porosity is high, the adsorption efficiency is high, the selectivity is good, and the repeated utilization rate is good.

The invention provides a spiral structure inertia focusing microfluidic cell screening device and a screening method thereof.The spiral structure inertia focusing microfluidic cell screening device comprises a planar spiral structure, the planar spiral structure is a single-ring planar spiral structure, and a single-ring planar spiral structure channel in the planar spiral structure is provided with at least two inlet channels and at least three outlet channels; the single-ring plane spiral structure channel, the inlet channel and the outlet channel are rectangular cross section channels, the single-ring plane spiral structure is provided with a plurality of stabbing structures, and the injection pump is driven to adjust the flow of a blood sample and sheath flow liquid so as to adjust the starting point Reynolds number of the single-ring plane spiral structure channel, so that stable cell inertial focusing is realized; the device can replace a complex and high-cost multi-separation microfluidic device, is not easy to block, easy to clean, high in stability, not easy to deform, high in experiment accuracy and reliability, beneficial to long-term experiment operation and use, and high in repeated utilization rate.

The invention discloses a micro electro mechanical system semiconductor hydrogen sensor and a preparation method thereof. The sensor comprises SnO2, Au and ZnO layers, a micro heating plate substrate and a ceramic substrate which are arranged from top to bottom, the method comprises the following steps: mounting a target material on a target position; stabilizing the micro heating plate substrate on a heating table; vacuumizing the sputtering chamber to enable the vacuum degree of the sputtering chamber to be below 5 * 10 <-3 > Pa; argon is introduced into the cavity until the pressure in the cavity reaches about 1 Pa; a ZnO film with the thickness of 50-200 nm is formed on the surface of the micro heating plate substrate; an Au film with the thickness of 2-10 nm is formed on the surface of the ZnO film, and a ZnO-Au composite material is obtained; and forming a SnO2 thin film with the thickness of 4-10nm on the surface of the Au thin film to obtain the ZnO-Au-SnO2 sandwich sensitive composite film. The sensor is high in response speed, short in recovery time and high in detection precision, and the hydrogen sensor with the high response value can be prepared through the method.

The invention relates to the field of genetic engineering and immobilized enzymes, in particular to a sucrose isomerase recombinant as well as a construction method and application thereof. Wild type sucrose isomerase (Sase) from dispersed pantoea is subjected to molecular modification, fusion expression is performed after screening of affinity peptide ligands, the specific enzyme activity of the obtained sucrose isomerase recombinant is 88% higher than that of sucrose isomerase, the enzyme activity level of the sucrose isomerase recombinant is remarkably improved, and the specific catalysis efficiency of the sucrose isomerase recombinant on a sucrose substrate is improved; and reference is provided for improving molecular modification of other enzymes. The sucrose isomerase recombinant has good thermal stability, and finally, research on embedding system optimization is performed on one-step purification and immobilization of SIase, so that the affinity directional immobilized enzyme microspheres which have high hardness and strength and can effectively reduce leakage or loss of enzyme molecules are prepared. The reusability of the sucrose isomerase recombinant is obviously improved.

The invention discloses a preparation method and application of a Cu2O-SnO2 / g-C3N4 ternary composite photocatalytic material.The preparation method comprises the steps that firstly, carbon-nitrogen precursor powder is roasted to obtain g-C3N4 powder, then the g-C3N4 powder, tin oxide powder, a surfactant, a copper source and deionized water are evenly mixed to obtain a mixed solution, then a sodium hydroxide solution is added into the mixed solution drop by drop, the mixed solution is stirred to be uniform, and the Cu2O-SnO2 / g-C3N4 ternary composite photocatalytic material is obtained. The preparation method comprises the following steps: adding the Cu2O-SnO2 into a reaction kettle, adding ascorbic acid to obtain a mixed solution, carrying out a hydrothermal reaction on the mixed solution, cooling to normal temperature, and finally carrying out centrifugal separation, washing, drying and grinding to obtain the Cu2O-SnO2 / g-C3N4 ternary composite photocatalytic material. According to the preparation method disclosed by the invention, the three materials of Cu2O, SnO2 and g-C3N4 are used for constructing a dual-action mechanism of Z-schema and a p-n junction, so that the photocatalytic performance is effectively improved.

The present invention discloses an air source heat pump unit which can provide anti-frost treatment, and relates to the technical field of anti-frost treatment for pump units, comprising a protective shell, wherein grids are fixedly connected to the top of the protective shell on all four sides, and an evaporator is fixedly connected to the top inner surface of the protective shell, and further comprises: a reciprocating flipping mechanism, through the setting of the reciprocating flipping mechanism, a reciprocating screw rod and an L-shaped long plate are adopted, so that a defrost rod can not only reciprocate on the surface of the evaporator, but also be limited and flipped by a rack plate and a rotary groove at a turning point, so as to achieve double-sided heating and defrosting, and the defrost rod does not fit the evaporator, so as to avoid wear on the surface of the evaporator, and the frost on the surface of the evaporator is melted by the heat of the heating wire, and the mobile defrosting method replaces the traditional fixed heat source heating, so that the heat distribution can be controlled more accurately, and the local overheating or uneven heating which may occur in the traditional fixed heat source heating is avoided, thereby saving energy.

The invention discloses a magnetic spinel recoverable adsorbent and a preparation method and application thereof, and the method comprises the following steps: (S1) fully mixing a FeCl3 aqueous solution, a MnCl2 aqueous solution and a NaOH aqueous solution to form a suspension; and (S2) putting the turbid liquid obtained by mixing in the step (S1) into a water bath kettle at 97 DEG C, heating for 120 minutes, repeatedly washing the obtained slurry with absolute ethyl alcohol and deionized water, removing residual alkaline substances, drying the obtained particles in a vacuum drying oven at 100 DEG C for 3-5 hours, sufficiently grinding, putting into a tubular furnace, and annealing for 180 minutes at 300-600 DEG C at a heating rate of 10 DEG C / min to obtain the FeMn2O4 magnetic adsorbent. The magnetic spinel recoverable adsorbent disclosed by the invention is high in adsorption capacity, and when the concentration of an antimony-containing solution is 600mg / L, the maximum adsorption capacity of FeMn2O4 is measured to be 2674.49 mg / g.

The invention relates to the technical field of metallurgical waste slag comprehensive collection and utilization machinery, and particularly discloses a converter split box type slag remover and a working method.The converter split box type slag remover comprises a first box body, a second box body and a lifting lug mechanism; the first box body and the second box body are connected with each other or a middle box body is connected between the first box body and the second box body; the first box body and the second box body are movably provided with lifting lug mechanisms, the lifting lug mechanisms are provided with lifting lug connecting plates and guide wheels, the lifting lug connecting plates movably penetrate through the first inserting holes of the first box body and the second inserting holes of the second box body respectively, strip-shaped holes are formed in the lifting lug connecting plates, and the lifting lug connecting plates penetrate through the strip-shaped holes through pin shafts to be movably installed on the slag car; a guide wheel is movably mounted at the lower part of the lifting lug connecting plate and is in rolling contact with a slag car running guide rail; the maintenance efficiency in the using process is guaranteed, the maintenance cost is reduced, and the device has the advantages of being simple in structure, convenient to use and capable of being repeatedly used and has the characteristics of being simple, easy to implement and beneficial to popularization.

The invention relates to a flash non-woven fabric and a preparation method and application thereof, and belongs to the technical field of high polymer materials. The flash non-woven fabric provided by the invention is prepared from the following components in parts by mass: 60 to 90 parts of polymethylpentene, 4 to 15 parts of polylactic acid, 4 to 10 parts of epoxy resin, 1 to 5 parts of styrene-ethylene-butylene-styrene block copolymer and 2 to 10 parts of modified calcium carbonate, the surface hydroxyl content of the modified calcium carbonate is more than or equal to 10 / nm < 2 > and less than or equal to 50 / nm < 2 >. The flash non-woven fabric provided by the invention has excellent mechanical properties, air permeability and ethylene oxide desorption performance, and is high in repeated utilization rate when being applied to preparation of medical instrument packaging products. Meanwhile, the flash non-woven fabric provided by the invention is wide in raw material source and beneficial to actual production.

The invention provides a trapping agent for C4 mixed hydrocarbon gas separation, a preparation method of the trapping agent and a C4 mixed hydrocarbon gas separation method. The trapping agent comprises a solid adsorbent and an organic solvent, the solid adsorbent is CALF-20 (Callidol Alkaline The total mass of the trapping agent is 100%, the content of the solid adsorbent is 15wt%-50wt%, and the content of the organic solvent is 50wt%-85wt%; the organic solvent is prepared from one or a combination of more than two of 1, 3-dimethyl-2-imidazolinone, benzyl alcohol and dimethyl phthalate. The trapping agent is excellent in effect, has the advantages of being large in n-butene adsorption capacity, high in n-isobutene / isobutene selectivity, high in adsorption speed, good in regeneration performance and the like, and provides diversified choices for separating C4 mixed hydrocarbon gas through a slurry method in industrial practical application.

The invention is applicable to the technical field of rolling trigger roller replacement, and particularly relates to a plate mill roller replacement device and a working method thereof, the plate mill roller replacement device comprises a rolling trigger rack, a hydraulic lifting rod is mounted on the surface of the rolling trigger rack, and a connector is arranged at one end of the hydraulic lifting rod; a mounting seat is arranged on the side face of the rolling trigger rack, a plurality of supporting frames are arranged on the surface of the mounting seat, a roller changing platform is arranged on the surfaces of the supporting frames jointly, a roller changing vehicle body is arranged on the surface of the roller changing platform, and a plurality of first wheels are mounted on the surface of the roller changing vehicle body. The automatic roller replacing device has the following beneficial effects that firstly, the roller replacing process is highly automatic, manual operation is greatly reduced through cooperation of the hydraulic push-pull rod and the hydraulic lifting rod, and efficiency is improved; and secondly, the safety of the operation process is guaranteed through the design of the device, lifting and moving are controlled through hydraulic pressure, and accidents possibly occurring in the manual carrying process are avoided.

The invention discloses a measuring device and method for correcting torsion errors of an inclinometer guide groove, and the device comprises a data collection mechanism, an inclinometer and an inclinometer guide groove torsion angle measuring mechanism which extends into the inclinometer and is connected with the data collection mechanism. A first guide groove, a second guide groove, a third guide groove and a fourth guide groove are sequentially formed in the inner wall of the inclinometer pipe in the circumferential direction at equal intervals. The method comprises the following steps of: 1, burying the inclinometer; 2, mounting a measuring device; 3, measuring the torsion angle of the inclinometer; 4, measuring the displacement of the inclinometer pipe; and 5, carrying out torsion correction calculation on the inclinometer guide groove. The measuring device formed by combining the angle sensor and the sliding guide wheel is matched with the pre-buried inclinometer pipe, the torsion angles of the four guide grooves in each measuring section in the inclinometer pipe can be obtained, the relative torsion deformation angle of each measuring point of the inclinometer pipe is obtained through torsion superposition calculation, displacement errors, measured by the inclinometer, in different directions are corrected, and the accuracy of the displacement errors is improved. The calculation method is scientific and reasonable, and can reflect the real deformation condition.

The present invention discloses a truss bracket device for block 0 and block 1 and a construction method thereof, the device comprises a first group of truss structures and a second group of truss structures, the first group of truss structures and the second group of truss structures both comprise a transverse truss, a vertical truss and a lower torsion bar, and an upper torsion bar and an upper truss, the lower torsion bar and the upper torsion bar are both retractable; the method comprises the following steps: 1. pre-embedded fine-rolled threaded steel bars during construction of the top of the bridge pier; 2. splicing of the truss structure; 3. hoisting of the truss structure; 4. installation of the first group of brackets and the second group of brackets; 5. adjustment and anchoring of the first group of truss structures; 6. adjustment and anchoring of the second group of truss structures; 7. laying of I-shaped wood distribution beams and installation of bottom molds; 8. steel bar binding and concrete pouring of block 0 and block 1. The present invention has multiple truss structures that are convenient to install and disassemble as a whole and can be reused, reducing manpower and material resources and improving the adaptability of the truss structure bracket.

The present invention relates to a core-shell magnetic molecular imprinted polymer material, a preparation method and its application in enriching 25 steroid hormones in blood. The present invention is based on the polymerization reaction of 3,3-dihydroxybenzidine and p-benzoquinone, precipitates and polymerizes on the surface of magnetic ferroferric oxide nanoparticles modified with silicon dioxide to form a polymer layer, and simultaneously uses virtual template betamethasone for imprinting treatment to obtain a core-shell magnetic molecular imprinted polymer material. The core-shell magnetic molecular imprinted polymer material prepared by the present invention has good magnetic responsiveness. The adsorption test of 25 steroid hormones shows that the core-shell magnetic molecular imprinted polymer material of the present invention has good adsorption and desorption effects, and is convenient to separate and recyclable after adsorption, and has good application prospects.

The utility model relates to the field of lithium batteries, in particular to a battery core packaging structure which comprises a shell, radiating fins are mounted at the bottom end in the shell through mounting grooves, a battery core main body is arranged at the tops of the radiating fins, a positioning block is fixedly arranged on the outer side of the battery core main body in the shell, a sealing cover is arranged at the top of the shell, and the battery core main body is arranged in the shell. Through grooves are formed in the surfaces of the two ends of the sealing cover. According to the utility model, the threaded rod is matched with the pressing block for use, so that a limiting and fixing effect can be effectively provided for the battery cell main body after the packaging work is completed, the placement stability of the battery cell main body in the shell is ensured, and meanwhile, the bottom surface of the battery cell main body can be tightly attached to the upper surfaces of the radiating fins; therefore, the heat dissipation efficiency provided by the heat dissipation fins can be improved, and meanwhile, the structure is convenient to use and can be used without tedious steps, so that the packaging structure has relatively good use convenience.

The invention belongs to the technical field of solid waste treatment and water purification environmental protection, and discloses a method for preparing modified sludge biochar from boron carbide and application of the modified sludge biochar in selective degradation of organic pollutants. The method comprises the following steps: pre-treating sludge; mixing the boron carbide and the sludge; the invention relates to a method for synthesizing boron carbide modified sludge biochar by utilizing a pyrolysis method. The method is mild in reaction condition, low in cost, simple and convenient to operate and environment-friendly. The synthesized boron carbide modified sludge biochar can be used as a persulfate activator for treating wastewater containing organic pollutants, has the advantages of high catalytic reaction rate, high degradation efficiency and strong reusability, and is beneficial to popularization and application in the actual wastewater treatment process.

The application belongs to the technical field of cable manufacturing, and specifically discloses a composite cable and a preparation method thereof, which comprises an inner sheath, the inner sheath is internally provided with connecting sleeves, the connecting sleeves are internally provided with connecting cores, the inner sheath is internally provided with first filling layers at the outer walls of the connecting sleeves, the outer wall of the inner sheath is circumferentially provided with control cores, the outer wall of the inner sheath is provided with an insulating layer, the control cores are located in the insulating layer, the gap between the control cores and the insulating layer is filled with a second filling layer, the second filling layer is connected with the outer wall of the inner sheath, the middle part of the outer wall of the insulating layer is provided with a reinforcing shielding layer, and the outer wall of the insulating layer is provided with a buffer sleeve. The application improves the mechanical reliability, anti-interference ability and service life of the cable in a poor environment.

The plane exhibition stand comprises a frame, an exhibition opening is formed in the frame, a magnetic metal adsorption plate is fixed to the top end of the exhibition opening, exhibition clothes hangers are evenly arranged at the bottom of the magnetic metal adsorption plate, permanent magnets are arranged in the centers of the top ends of the exhibition clothes hangers, and the permanent magnets are fixed to the exhibition opening. The display clothes hanger is fixed to the surface of the magnetic metal adsorption plate in an adsorption mode through a permanent magnet, the bottom of the frame is rotationally connected with a base table, Foma wheels are fixed to the four corners of the bottom of the base table, one end of the base table is fixedly connected with a push handle, and a fixing structure is arranged between the frame and the push handle. And the overall structure is stable and reliable. Meanwhile, the display stand has excellent reusability, the size can be reduced when the display stand is not used, the portability is further improved, the use cost of the display stand can be reduced while convenience is brought to a user, and stability and reliability of the whole display stand in various use scenes are guaranteed as a whole.

The application discloses a method for treating antibiotic wastewater by using a graphdiyne / ferrous indium sulfide nanocomposite to activate persulfate, and the method is characterized by using the graphdiyne / ferrous indium sulfide nanocomposite as a catalyst to activate persulfate for degrading and treating antibiotic wastewater, wherein the graphdiyne / ferrous indium sulfide nanocomposite comprises ferrous indium sulfide nanoparticles, and the nanoparticles are loaded with graphdiyne nanosheets. The method for treating antibiotic wastewater by using the graphdiyne / ferrous indium sulfide nanocomposite to activate persulfate uses the graphdiyne / ferrous indium sulfide nanocomposite as a catalyst, wherein the nanocomposite has many reactive sites, high catalytic activity and good stability, can efficiently activate persulfate with a smaller amount of catalyst, can efficiently remove antibiotics in wastewater, and has the advantages of low cost, high treatment efficiency, good removal effect, green environmental protection and the like, and therefore, the method has important significance for effectively purifying antibiotic wastewater, has high use value and good application prospect.

The utility model relates to the field of positioning supporting frames, and discloses a concrete wall steel bar formwork positioning supporting frame which comprises a bottom plate, a movable sliding plate with the adjustable position is arranged on the bottom plate, a rectangular installation frame is fixedly installed on the movable sliding plate, and a hinge supporting rod and a hinge rod are hinged to the two sides of the interior of the rectangular installation frame respectively. The hinge rod is supported at the bottom of the hinge supporting rod, a locking assembly is arranged on one side of the rectangular mounting frame and used for locking the inclination angle of the hinge supporting rod, an attaching plate is arranged at the tail end of the hinge supporting rod, and the position of the whole supporting device can be easily and transversely adjusted through a movable sliding plate capable of sliding on the bottom plate. And the requirements of templates at different positions can be met. Meanwhile, the inclination angle of the hinged supporting rod can be freely adjusted around the hinged point of the rectangular mounting frame, the hinged supporting rod slides in the strip-shaped groove in a matched mode, the supporting requirements of formworks of different heights and gradients can be accurately met, and the adaptability of the supporting system to various construction scenes is greatly improved.

The invention relates to a magnetic metal organic framework, in particular to a deep eutectic solvent regulated magnetic metal organic framework and application thereof. According to the invention, DES functionalized regulated Fe-based MOF is successfully synthesized, and selective removal of tetracycline antibiotics in sewage is realized. The prepared MMIL-101-NH2-DES adsorbent has excellent adsorption performance on tetracycline, and the adsorption performance comprises good adsorption capacity, outstanding anti-interference capability and excellent renewability and reusability. And the removal rate in a 100 [mu] g / mL tetracycline solution in 60 min is as high as 98.82%. The designability advantage of DES is used for replacing a traditional organic solvent to adjust a supporting material, the adsorbent with selective adsorption capacity on a target analyte is synthesized, and the concept of sustainable chemistry is met. Meanwhile, the green characteristic of DES also provides a very good solution for avoiding secondary pollution in pollutant removal.

The application discloses a polymer probe and a preparation method and application thereof, and belongs to the technical field of chemical probes.The structural formula of the polymer probe provided by the application is shown as formula (I): in the formula (I), x and y are each independently selected from any integer in 1-3000.The polymer probe has good water solubility, obvious visual color change for sulfur dioxide and derivatives thereof, and can be used for qualitative or quantitative detection of sulfur dioxide and derivatives thereof in water; meanwhile, the polymer probe has thermal response performance, can be recycled and reused by heating after a reaction of the polymer probe with sulfur dioxide and derivatives thereof in an aqueous solution is completed, is used for secondary analysis and identification of sulfur dioxide and derivatives thereof, has good reusability, is favorable for cost reduction, and has wide application in detection of sulfur dioxide and derivatives thereof.

An acid washing tank, comprising a tank body, a tank cover arranged on the tank body, a filtering channel arranged on one side of the tank body for filtering acid washing liquid, a filter screen arranged in the filtering channel and detachably connected with the filtering channel, the filter screen comprising a fixing portion arranged on one side, a fixing groove fixedly connected with the fixing portion arranged on one side of the filtering channel, an insertion groove arranged on the other side of the filter screen, a connecting block arranged on the filtering channel and matched with the insertion groove, a locking track arranged in the insertion groove, and a locking shaft arranged on the connecting block and used for being clamped with the locking track to form a fixed connection.

The invention belongs to the technical field of polyether preparation, and discloses a heterogeneous solid catalyst and a method for preparing styrylphenol polyoxyethylene ether by using the heterogeneous solid catalyst. The preparation method comprises the following steps: dispersing a nano inorganic solid material serving as a pore-making hard template into high-molecular resin, and dissolving in acid liquor to remove the nano inorganic solid material, so as to obtain porous polymer microspheres; and swelling and dispersing the perfluorosulfonic acid polymer, and impregnating the porous polymer microspheres to obtain the heterogeneous solid catalyst. The heterogeneous solid catalyst provided by the invention has the advantages of strong acidity, large specific surface area and excellent catalytic performance, is beneficial to the generation of stilbene phenol, and reduces the residue of free phenol, so that the prepared styryl phenol polyoxyethylene ether has high purity and less foam. The heterogeneous solid catalyst provided by the invention is small in corrosion to equipment, high in reusability and beneficial to being directly applied to actual production.

The invention discloses a sulfur-vacancy-rich ZnIn2S4 and AgBiS2 heterojunction photocatalytic composite material as well as a preparation method and application thereof. The composite material is an S-type heterojunction composite material formed by growing a ZnIn2S4 nanosheet containing sulfur vacancy on a sea urchin-shaped AgBiS2 semiconductor material. The preparation method comprises the following steps: mixing silver nitrate, bismuth nitrate pentahydrate, thiourea and ammonium acetate serving as raw materials, and reacting the obtained mixed solution at 150-200 DEG C for 4-7 hours to obtain sea urchin-shaped AgBiS2 powder; and growing a ZnIn2S4 nanosheet on the sea urchin-shaped AgBiS2 powder in situ, so as to obtain the ZnIn2S4-coated AgBiS2 heterojunction photocatalytic composite material rich in sulfur vacancy. The broccoli-shaped sulfur-rich vacancy ZnIn2S4 (at) AgBiS2 heterojunction photocatalyst disclosed by the invention shows enhanced hydrogen production, tetracycline hydrochloride and rhodamine B degradation performance and excellent photocatalytic stability.

The utility model relates to the technical field of steering systems, in particular to a steering engine sensor cover structure convenient to disassemble. A steering engine sensor cover structure convenient to disassemble comprises a sensor cover and is characterized in that three inverted buckles are evenly distributed on the upper end face of the sensor cover, each inverted buckle is of an arc-shaped boss structure, the inner side face of each inverted buckle is in arc connection with the upper end face of the sensor cover, and the outer side face of each inverted buckle is located on the outer side of the upper end face of the sensor cover. Compared with the prior art, the steering engine sensor cover structure convenient to disassemble is provided, the three inverted buckles are additionally arranged on the upper end face of the sensor cover, the disassembling efficiency of the steering engine sensor cover and the reusability of the shell are improved, and the purpose of saving cost is achieved.

The utility model discloses an anti-falling device for a pile hole. The anti-falling device comprises a first rotating rod piece, a second rotating rod piece, a third rotating rod piece and a hole shielding surface, one end of the first rotating rod piece, one end of the second rotating rod piece and one end of the third rotating rod pieces are rotationally connected through rotating shafts, and the third rotating rod pieces are arranged between the first rotating rod piece and the second rotating rod piece in a stacked mode. And the hole shielding surface is arranged on the first rotating rod piece, the plurality of third rotating rod pieces and the second rotating rod piece, so that the hole shielding surface can be rotationally unfolded and covers the pile hole, or the hole shielding surface can be rotationally folded between the first rotating rod piece and the second rotating rod piece. The utility model relates to the technical field of constructional engineering, and can solve the problems of low manual filling efficiency and unsaturated utilization rate of filling machinery in the prior art.