51results about How to "Avoid falling off etc." patented technology

The invention discloses a preparation method of a molecular engram composite film for separating a tryptophane isomer, which comprises the following steps: by using a polyvinylidene fluoride/polyvinyl alcohol blended film as the base film, coating chitosan used as a functional polymer molecular engram coating liquid on the surface of the base film in a crosslinking manner; and after the solvent is volatilized to dryness, eluting to remove template molecules, thus obtaining the molecular engram composite film capable of performing specific recognition on the template molecules. The composite film prepared by the method can continuously and fast realize the separation of a tryptophane isomer, has the advantages of simple separation operation, high efficiency and energy saving, and can be easily industrialized.

The invention provides a self-supporting carbon nanofiber load molybdenum disulfide composite material, and a preparation method and application thereof, and belongs to the field of aluminum ion batteries. (NH4)2MoS4 is directly reduced to generate MoS2, the self-supporting carbon nanofiber load molybdenum disulfide composite material has the peculiar property of flexible self supporting and can be directly used as an electrode, a complex electrode preparation technology is avoided, phenomena that electrical conductivity is lowered, the material can not resist high temperatures and active substances fall in a circulation process since an electrode preparation technology is complex and binder is used are avoided, and the carbon nanofiber can be used as the supporting substrate of molybdenumsulfide. In a charging and discharging circulation process, a situation that the structure of molybdenum sulfide is damaged in a circulation process can be avoided, cycle performance is stable, meanwhile, the material has the unique mosaic structure of molybdenum disulfide in the carbon nanofiber, is very favorable for the embedding and the disembedding of aluminum ions in a battery charging anddischarging process, and can meet practical application.

The invention aims to provide a laser engraving machine high in marking efficiency and marking quality and wide in use range. The laser engraving machine comprises a frame, a laser engraving unit and a feeding unit, wherein the laser engraving unit is arranged on the frame and comprises a laser device and a scanning camera, the laser device moves horizontally along the frame, the feeding unit directly facing the laser engraving unit comprises a feeding belt directly facing the laser device and the scanning camera, and the feeding belt is driven by a drive mechanism on the frame. The laser engraving machine has the advantages that consumable material use is avoided, and use cost is reduced greatly; the laser engraving machine is high in marking quality and avoids contamination, scraping and shedding the like as compared with printing or labeling.

The invention discloses a composite adsorbent and a preparation method thereof. The composite adsorbent comprises calcium chloride, expanded graphite and polyethylene oxide. According to the composite adsorbent and the preparation method thereof, the heat and mass transfer ability of the adsorbent is improved to prevent the agglomeration of the adsorbent through the mixing of the expanded graphite and the calcium chloride, and meanwhile, the phenomena of loosening, layering, falling off and the like of the adsorbent are avoided through the addition of the polyethylene oxide, and therefore the mechanical performance of the adsorbent is improved; the method for preparing the composite adsorbent provided by the invention is simple and feasible, and is conveniently popularized.

The invention discloses environment-friendly plastering dry-mixed mortar and a preparation method thereof, and belongs to the technical field of building materials. The environment-friendly plasteringdry-mixed mortar is mainly prepared from the following raw materials in parts by weight: 95-110 parts of cement, 650-670 parts of machine-made sand, 175-180 parts of dried sand, 20-30 parts of stonepowder, 40-50 parts of fly ash, 8-12 parts of desulfurized gypsum, 15-20 parts of lime, 2-5 parts of latex powder and 0.35-0.8 part of a water reducing agent. The environment-friendly plastering dry-mixed mortar has the advantages that the proportions of various raw materials are reasonably set, the mechanical property of the dry-mixed mortar is fully guaranteed, the water-retaining property of the dry-mixed mortar is not reduced, the use amount of additives is also greatly reduced, and the environmental friendliness of the plastering dry-mixed mortar is improved.

The invention discloses a non-slip wear-resistant floor coating and a preparation method, and belongs to the technical field of decorative coatings. The coating comprises modified polyacrylic resin, silicone acrylic emulsion, titanium dioxide, lime powder, paste attapulgite clay, alumina, filler, defoamer and pigment. The preparation method includes the following steps: firstly adding the modified polyacrylic resin and water to a reaction kettle, adding the paste attapulgite clay, the alumina and the titanium dioxide after heating and stirring, mixing and reacting for 1-2h, then adding the silicone acrylic emulsion for ultrasonic treatment for 20-30min, adding the lime powder, filler and defoamer with stirring and shearing for 5-10min, and adding the pigment into the mixture prior to mixing evenly to obtain the coating. The coating has good non-slip performance, greatly improves use safety for users, and has good wear resistance, good coating adhesiveness and high use value.

The invention relates to a laboratory sample identification system based on an RFID technology, the system comprises a background server and terminal equipment connected to the background server, and further comprises a total read-write system connected with the terminal equipment; the system further comprises a plurality of test tube supports, and RFID tags are arranged on the test tube supports; the system further comprises a placement tray, an RFID sensing system is arranged on the placement tray, and an RFID reader reads the content on the RFID tag and uploads the content to the background server; the system also comprises an RFID read-write system, and the RFID read-write system comprises an information obtaining system and an RFID write-in system; the information obtaining system scans and reads the RFID tag and then enters the RFID write-in system, and the RFID write-in system stores data information into the RFID tag; reading and positioning of the RFID test tubes in the single grid of each matrix are realized through RF Switch control; the RFID tag is installed at the bottom of the test tube support or surrounds the wall of the test tubes, the RFID antenna is arranged below the test tube groove at the bottom of the clamping groove and is connected with the RF Switch and the reader through a feeder line, and batch checking and accurate positioning are achieved through reading and writing.

The invention discloses a joint filling material for a building exterior wall. The joint filling material is prepared from, by mass, 100-200 parts of cement, 100-200 parts of coal ash, 100-200 parts of building debris powder, 100-200 parts of lime powder, 50-70 parts of calcium carbonate, 70-100 parts of sintered pellets, 80-100 parts of mineral powder, 100-150 parts of iron powder, 10-15 parts of antioxidant, 10-15 parts of water reducer, 30-50 parts of quartz powder and 200-250 parts of water. The joint filling material can be effectively attached between tiles to seal tile joints, the phenomena of cracking and shedding can be effectively avoided after sealing, and then the phenomenon that moisture permeates into the wall and makes the tiles shed is avoided.

The invention provides an optional voltage type drainage circuit structure which comprises a drainage circuit, a control circuit, a detection circuit and a set switch, wherein the detection circuit is connected with a pipeline testing terminal and a reference electrode of a metal pipeline protection circuit structure, and is sequentially connected with the control circuit and the drainage circuit; the control circuit is connected with the set switch; the drainage circuit is divided into a main circuit and a spare circuit, and is connected with a magnesium anode of the metal pipeline protection circuit structure. The optional voltage type drainage circuit structure has the effects that the function of intelligent 'on-demand drainage' can be realized by the circuits; the whole drainage system does not have drainage blind area voltage, so that the consumption of the magnesium anode is greatly reduced, and the operating cost is saved. The working state of the main circuit is detected by the control circuit regularly every 2h-4h; if the main circuit is abnormal due to damage, the main circuit is immediately switched to the spare circuit, and the negative potential of the magnesium anode is isolated by the spare circuit and can not be completely applied onto a pipeline, so that the phenomena that the metal pipeline has hydrogen evolution reaction, an insulating layer of the pipeline falls off, and the like can be avoided, and the pipeline drainage operation is safe and reliable.

The invention discloses a surface repairing device for the bottom of a ship, which comprises a shell. Two strong magnets are symmetrically arranged on the two end walls of the shell. A sealing ring isfixedly arranged on the lower end surface of each strong magnet; two detection mechanisms are symmetrically arranged below the shell; the detection mechanism comprises two detection equipment frameswhich are symmetrically and fixedly arranged on the lower end surface of the shell. Tiny scars on the surface of a ship body can be repaired in the navigation process of the ship, no need exists for the ship to be berthed and then repaired, and meanwhile, a drainage and sealing structure is arranged, the damaged part is covered in the damage repairing process of the ship body, direct contact between a repairing agent and seawater is avoided, the repairing quality is improved, and the situation that the repairing agent falls off due to the fact that the repairing part makes contact with the seawater is avoided.

The invention provides a stone cladding structure with a high anti-seismic function and relates to a stone cladding technical structure. Through the improvement of a stone fixing structure and conversion of the force bearing direction of decoration materials, the highest anti-seismic and anti-wind-pressure effect is achieved. The stone cladding structure comprises a wall face fixing net and a stone slab fixing mechanism. The stone cladding structure is characterized in that the wall face fixing net comprises vertical hanging steel wire drawing cords and transverse steel wire drawing cords; the vertical hanging steel wire drawing cords and the transverse steel wire cords are arranged in a crossed mode; the space between each transverse steel wire drawing cord and the two vertical hanging steel wire drawing cords adjacent to the transverse steel wire drawing cord is provided with inserting and hanging angle codes; according to the stone slab fixing mechanism, holes or grooves perpendicular to diagonal lines are formed in the positions symmetrical to the diagonal lines in the direction perpendicular to the connection lines of the diagonal lines of the four corners on the back side of a stone slab; meanwhile, a hole is further formed in the stone slab diagonal line, towards the central side, of the stone slab provided with the holes or the grooves, the stone slab angle codes are installed in the holes or the grooves, the diagonal stone slab angle codes are connected through the steel wire drawing cords, and positioning drawing strips are connected through round buckles; and thus a stone cladding wall face is formed.

The invention discloses a voltage transformer insulation sleeve tube monitoring device comprising a monitoring device shell body, a bottom end part and a side end part of the monitoring device shell body are respectively provided with a bottom part fixing device and a side part fixing device, the bottom part fixing device comprises a support rob member which extends in a vertical direction, the support rod member has an electric screw rod structure, a bottom part of the support rod member is provided with two fixed end plates, each fixed end plate is connected with the support rod member via a rotating shaft, the side part fixing device comprises a connecting rod member which extends in a horizontal direction, the connecting rod member has a electric screw rod structure, an end part of the connecting rod member is provided with an L-shaped clamping end body, the monitoring device can be supported and processed in multiple directions during installation processes, installation stability of the monitoring device can be improved markedly, and the monitoring device can be effectively prevented from falling off due to unexpected factors when being used in fields.

The invention aims to provide a laser engraving machine which is high in code printing efficiency, good in quality and wide in application range. The laser engraving machine comprises a machine frame, a laser engraving unit and a feeding unit, wherein the laser engraving unit is arranged on the machine frame, and the feeding unit right faces the laser engraving unit. The laser engraving unit comprises a laser device and a scanning camera which horizontally move along the machine frame. The feeding unit comprises a feeding belt which right faces the laser device and the scanning camera. The feeding belt is driven by a transmission mechanism on the machine frame. According to the laser engraving machine, using of wastage materials is avoided, and the using cost is greatly reduced; and the code printing quality is high, and compared with label printing or pasting, the phenomena of defacing, scraping, disengagement and the like are avoided.

The invention discloses a scalp needle fixator for a pediatric department, belonging to the technical field of medical instruments. The scalp needle fixator comprises a fixing cap, a fixing pad, a needle pad and binding bands; the fixing cap comprises a head fixing ring and a cap body, two sides of the head fixing ring are provided with the binding bands which are connected with a jaw supporting pad in a dismountable way, the interior of the head fixing ring is connected with the fixing pad through a first sticky buckle and a second sticky buckle; the cap body is a semi-circular body which isformed by knitting elastic warp and weft, the outside of the head fixing ring is provided with multiple buckles for fixing an infusion tube, the other side of the fixing pad is provided with two connecting pasters and elastic fixing bands, the connecting pasters are connected with the needle pad through a first magnetic hidden buckle and a second magnetic hidden buckle, and the needle pad is of atriangular prism structure and is provided with a needle file placement groove. The scalp needle fixator provided by the invention can be used for effectively solving the problem of syringe needle falling, which increases the harm to a child patient, caused by poor fixing effect of the scalp needle; the fixing cap and the binding bands are combined for use, the fixing effect is good; in addition,the fixing cap can be reused for multiple times, so that the use ratio is high.

The invention discloses a composite proton exchange membrane based on an acetate fiber porous support body and a preparation method of the composite proton exchange membrane. The composite proton exchange membrane comprises the acetate fiber porous support body, a polymer proton conductor, an enhanced proton conduction additive and a cross-linking agent. The preparation method comprises the following steps of: coating the acetate fiber porous support body with a membrane casting solution by adopting a preset coating process, carrying out drying treatment by virtue of a drying oven I, spraying the cross-linking agent and an inorganic oxide solution by adopting a preset spraying process, carrying out leveling and cross-linking reaction by virtue of rolling of a hot-pressing composite roller, and carrying out drying treatment through using a drying oven II to obtain the composite proton exchange membrane based on the acetate fiber porous support body. The proton exchange composite membrane prepared by the method is high in proton conductivity, high in mechanical strength, compact and high in uniformity.

The invention relates to a processing method which can improve the torsion resistance capacity of an anti-earthquake bush, aiming at the anti-earthquake bush in which an inner metal sheath is connected with an outer metal sheath by a rubber layer; after the rubber vulcanization molding process, radial compression processing is carried out to the excircle diameter of the outer metal sheath; the radial compression amount of the excircle diameter of the outer metal sheath is calculated by the following formula: Delta D is equal to (D1-D2) multiplied by K; in the formula, Delta D represents the radial compression amount of the excircle diameter of the outer metal sheath; D1 represents the inner-circle diameter of the outer metal sheath before the radial compression; D2 represents the excircle diameter of the inner metal sheath; K represents the rubber compression ratio, with the value ranging from 3 to 10 percent. The processing method improves the torsion resistance capacity of the existing anti-earthquake bush, and solves the problem that when in use, the anti-earthquake bush loses anti-earthquake effect and has short service life as the internal tissue of the rubber is destroyed due to the radial torsion force and the axial deviation angle tensile force.

The invention relates to the field of sensors, and particularly discloses a water temperature and water level sensor and a production method thereof. The water temperature and water level sensor is good in usability and simple in production procedure. The water temperature and water level sensor comprises resistors, a thermistor and multiple sections of stainless steel tubes. Two adjacent ports of two adjacent sections of stainless steel tubes are diagonal planes, nickel plates are arranged on the diagonal planes in a spot-welding mode, and the resistors are welded between two adjacent sections of stainless steel tubes. The interior of the stainless steel tube at the top end and the interior of the stainless steel tube at the bottom end are respectively welded with a high-temperature wire, the high-temperature wires penetrate through each stainless steel tube and penetrate out from the stainless steel tube at the bottom end, high-temperature wires are welded at the two ends of the thermistor, the thermistor is arranged in the second section of stainless steel tube at the top end, the high-temperature wires penetrate through the stainless steel tubes and penetrate out from the stainless steel tube at the bottom end, the stainless steel tubes are sleeved with stainless steel outer tubes, and non-conducting rubber tubes are arranged among the stainless steel tubes for fixing and connecting the stainless steel tubes. The water temperature and water level sensor has the advantages of being low in production cost, simple in production procedure, good in usability, and the like.

The invention aims to provide a laser engraving machine which has high marking efficiency, high quality and a wide application range. The laser engraving machine comprises a machine frame, a laser engraving unit arranged on the machine frame and a feeding unit facing the laser engraving unit, wherein the laser engraving unit comprises a laser device and a scanning camera, which move horizontally along the machine frame; the feeding unit comprises feeding belts which face the laser device and the scanning camera; and the feeding belts are driven by a transmission mechanism on the machine frame. The laser engraving machine provided by the invention avoids material waste, greatly reduces the use cost and has high marking quality, and compared with printing or labeling, the laser engraving machine avoids the phenomena of staining, stripping, falling and the like.

The invention relates to the technical field of logistics transportation equipment, in particular to a transport rack for urban region logistics transportation. The transport rack comprises a box body, wherein a placement cavity is arranged in the box body; a plurality of groups of partition plates are movably arranged in the placement cavity; the partition plate at the lowest end is fixedly arranged at the bottom of the placement cavity; a placement frame is arranged between every two adjacent groups of partition plates; a group of X-shaped supporting pieces are arranged at each of the two ends of the placement frame; the X-shaped supporting pieces are driven by a driving mechanism to adjust the height between every two adjacent groups of partition plates; and the placement frame is slidably arranged on the partition plates and arranged on the side wall of the box body through a positioning component. Through the arrangement of the placement frame, goods can be conveniently stored, the placement frame, the box body and the partition plates form a relatively sealed storage space, the goods can be effectively kept out of the sun, and the quality problem of the goods is avoided.

The invention discloses a double-layer automobile door pedal, which comprises a fixing member, a first pedal, a sliding member, an elastic member and a second pedal. The fixing part is divided into afirst part, a second part and a third part from top to bottom. The second part forms the accommodation chamber with the inside of the accommodation chamber provided with slide rails. A guide hole is arranged in the middle of the third part. The first pedal is positioned between the two sets of fixtures. The slider is located in the interior of the accommodation chamber and has a T-shaped cross section. The slider comprises a moving plate and a connecting rod. The moving plate is slidably connected with the slide rail, and the lower straight rod of the connecting rod passes through the guide hole and extends out of the bottom of the fixing member. An elastic member disposed between the moving plate and the third part. The second pedal is arranged at the lower end of the connecting rod, andthe second pedal is positioned below the fixing member. The double-layer automobile door pedal adopts a double-layer pedal, which is convenient for a user to get on a vehicle. The structure of the device is stable, the safety is high, and it is convenient and comfortable to use.

The invention discloses a new type of guide wheel, which comprises a guide wheel main body (1), in which reinforcing ribs (2) are distributed, and shock absorbers (3) are arranged in the reinforcing ribs (2), and on the guide wheel main body (1) Set the fixed pin (4), set the arc spring (5) in the fixed pin (4), set the knurling (6) in the guide rail, and set the fixed bracket (7) under the guide wheel main body (1). The beneficial effects of the present invention are: the present invention is reasonable in design, simple in structure, the improved shock-absorbing guide wheel is simple in structure, stable and reliable in operation, effectively reduces the vibration generated in the working process, improves the transmission efficiency of the guide wheel, and improves the high-strength guide wheel. The wheel greatly enhances the strength of the guide wheel, improves the anti-deformation ability, and adapts to various high-strength work requirements. The improved nylon guide wheel effectively protects the connecting rope, avoids slipping out, falling off, etc., and improves the guide wheel. transmission efficiency.