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The invention relates to a gradient active scaffold material for osteochondral repair and its preparation method and application. The active scaffold material is mainly composed of a cartilage layer, a calcified layer and a subchondral bone layer respectively loaded with biologically active substances, wherein the calcified layer is placed Between the cartilage layer and the subchondral bone layer, between the cartilage layer and the calcified layer, and between the calcified layer and the subchondral bone layer are organically connected by a biomedical degradable polymer; the cartilage layer, the calcified layer and the subchondral bone layer It has interpenetrating pores; its preparation method is: (1) preparation of HA/Col-I composite powder; (2) construction of bioactive substance controlled release system; (3) molding preparation of gradient active scaffold material for osteochondral repair The active scaffold material is used to prepare osteochondral complex; the active scaffold material can effectively promote the adhesion, proliferation and differentiation of cells, and is suitable for the repair and reconstruction of bone and cartilage and the delivery of nutrients.

The invention discloses a heavy power and free overhead conveyer which solves the technical problem that the prior device is not suitable for conveying heavy materials. The heavy power and free overhead conveyer comprises a driving device (1), a towing chain (6), a tensioning device (7), a track system (2), a dolly and a loading beam (5), wherein the track system comprises a towing track, loading tracks and a C-shaped bracket that opens downwards; an upper wing plate (10) of the towing track (9) is fixedly welded with the inner top surface of the C-shaped bracket together; a first loading track (19) and a second loading track (20) are arranged in parallel at the opening part of the C-shaped bracket which opens downwards, a right webplate of the first loading track (19) and right inner sides of an upper wing plate and a lower wing plate are fixedly welded with the right opening end of the C-shaped bracket together, a left webplate of the second loading track (20) and left inner sides of the upper wing plate and the lower wing plate are fixedly connected with the left opening end of the C-shaped bracket together, and a car body (18) is movably arranged between the two loading tracks. The invention is particularly suitable for conveying the heavy materials.

The invention discloses an osteochondral integrated repairing gradient hybrid support material and a preparation method thereof. The hybrid support material successively consists of a cartilage layer,a cartilage calcification layer and a calcification lower bone layer from top to bottom, wherein all layers are closely combined into a whole body by virtue of a 3D printing technology. The preparation method comprises the following steps: (1) separately preparing hybrid gel of each layer; (2) establishing an osteochondral integrated support model, and preparing a pre-gel support by virtue of a 3D printing technology; and (3) preparing the osteochondral integrated repairing gradient support by adopting a freeze drying technology. The integrated support prepared by the invention simultaneouslyhas a material gradient and a structure gradient, the cartilage layer, and the bone layer are closely connected into a whole body by virtue of the cartilage calcification layer, so that an effect forisolating the cell migration between the two layers can be realized; and by virtue of the 3D printing technology, the individualized tissue engineering support can be rapidly and precisely prepared according to the requirements of different patients, and the integrated construction of a complicated appearance and internal micro-structure of the support can be realized, and the application potential is great.

A process for extracting polyphenol from lotus root includes such steps as pulverizing lotus root, immersing in alcohol solution, heating while stirring, filtering, thermal concentrating, extracting with ethyl acetate, concentrating, drying to obtain coarse product, dissolving in acetone solution, separating and purifying. Its advantages are high quality of product, low cost and no pollution.

The invention relates to a shutoff valve with a large drift diameter, and belongs to the application field of valves. The shutoff valve with the large drift diameter comprises a valve body, a balloon and a gas pipe, wherein the balloon is arranged inside the valve body; the balloon is connected with a gas source through the gas pipe; the valve body is formed by connecting a main valve body and a valve cover through threads; a supporting ring is arranged inside the main valve body; a baffle ring is arranged between the main valve body and the valve cover; the balloon is arranged between the supporting ring and the baffle ring; the balloon is fixed on the supporting ring through the gas pipe; an electromagnetic valve and a pressure transmitter are installed on the gas pipe; a flow meter is arranged on an outlet pipe of the valve body; the flow meter and the electromagnetic valve are connected to a control device; and the control device regulates flow by controlling opening and closing of the electromagnetic valve. The balloon is installed inside the valve body, so that the shutoff valve with the large drift diameter is simple in structure and has no requirement on one-way flowability; action of the valve is realized by inflating and deflating the balloon, so that the shutoff valve with the large drift diameter is labor-saving, easy and convenient to operate, good in regulating performance and easy to realize automatic control; the balloon can be made of different materials, so that the shutoff valve with the large drift diameter is applicable to conveying of various media.

The invention discloses a beneficiation method for recovering chrome lump ore. The method comprises the following processing steps: crushing the chrome ore, and classifying three particle size grades including 20-15mm, 15-6mm and 6-2mm by narrow level screening; respectively carrying out dry-type strong magnetic separation on the three classified particle size grades obtained by screening by virtue of a permanent magnet roller type strong magnetic separator; adjusting the speed of a feeding belt of the permanent magnet roller type strong magnetic separator and the distance between the center of a barrel and a separating clapboard to obtain the best grading technical index, wherein the magnetic field intensity of the surface of the belt of the permanent magnet roller type strong magnetic separator is 0.9-1.3T. The method is simple in technological process, the high-quality Cr2O3 ore concentrate can be obtained by screening classification and narrow level screening, and the recovery rate of the Cr2O3 can be increased. The method is short in beneficiation process and is capable of obtaining the ore concentrate and removing tailings in advance; the beneficiation technology has the advantage of being lower in energy consumption compared with other technologies; the method not only can be used for screening the chrome ore, but also can be used for screening other weak magnetic iron minerals such as manganese ore, hematite, goethite, siderite and limonite.

The invention discloses a deepwater mining annular pipeline lifting and conveying device. A main supporting pipe is integrally formed by fixing at least two segments of supporting pipes through connecting pieces. A buoyancy air cabin with an electric hydraulic pump station, a buoyancy air cabin and a middle boost pump are arranged in the supporting pipes and an electric power control cable is arranged in a cable groove in the outer sides of the supporting pipes. The upper end and the lower end of the main supporting pipe are connected with a mining vessel lifting device and a traction steel wire rope respectively. A lifting and conveying pipe is an annular spiral pipeline which is fixed on the supporting pipes in a surrounding mode. The upper end and the lower end of the lifting and conveying pipe are connected with an ore sand output pump and a flexible conveying pipe respectively. The lifting and conveying pipe performs lifting and conveying in a spiral mode, the gravitational effect due to mineral substance free fall in the pipeline is avoided, and therefore the lifting and conveying distance is longer. Due to the fact that the electric hydraulic pump station is arranged in the buoyancy air cabin in the supporting pipes, the underwater weight of the whole device is reduced, in addition, working power is provided for the middle boost pump and an all-direction propeller, and the deepwater mining annular pipeline lifting and conveying device is safer and more reliable in use. Deepwater is led in through the all-direction propeller and a diversion hole to generate reacting force to prevent the supporting pipes from being twisted and deformed.

The invention belongs to the technical field of spraying machinery, and particularly relates to an external soil spraying machine and a special two-stage energy-saving high-lift underflow pump for the external soil spraying machine. The underflow pump comprises a transmission shaft, a pump body, a bearing chamber and a coupling, wherein the pump body comprises a one-stage pump body, a two-stage pump body and a two-stage feed pump body; a one-stage impeller is fixedly mounted at the right end of the transmission shaft in a sleeving manner; an elbow is communicated between the one-stage pump body and the two-stage feed pump body; a guard plate is arranged between the two-stage feed pump body and the two-stage pump body; a locating sleeve is mounted on the transmission shaft between the two-stage feed pump body and the two-stage pump body in a sleeving manner; a two-stage impeller is mounted on the locating sleeve in a sleeving manner, and mounted between a radial flange at one end of the locating sleeve and the guard plate; a feed channel is formed between the guard plate and the locating sleeve; the one-stage impeller and the two-stage impeller are mounted back to back; the bending direction of a helical blade of the one-stage impeller is counterclockwise; the bending direction of a helical blade of the two-stage impeller is clockwise; a horizontal feed port is formed in the right end face of the one-stage pump body; and a discharge port is formed vertically in a tangential direction of the pump body on the front side of the two-stage pump body. The underflow pump is higher in lift, and is suitable for conveying viscous slurry; the structure of the spraying machine is simplified; the manufacturing cost and engineering use cost of the spraying machine are lowered; breakdown maintenance points of the spraying machine are decreased; and the power loss of equipment is reduced.

The invention discloses an advertisement delivery method for an expressway tunnel, which is characterized by comprises the following steps: setting one or more machine positions to mount projection equipment at appropriate positions according to the effect needed by advertisements in the expressway tunnel; and taking the wall of the tunnel and the road surface of the tunnel as projection screens to deliver one or more dynamic or static advertisement pictures. The method has the advantages that the method develops the internal space of the expressway tunnel to deliver advertisement information, and obtains direct economic benefit when the similar effect of special lamplight zones is obtained.

Disclosed is a cold-storage agent that comprises halite, water, and 2-4 wt% of a dry crosslinked cellulose gel obtained by radiating an electron beam at a cellulose mixture paste obtained by mixing water and 15-25 wt% cellulose in a vacuum.

Disclosed is a conveying and detecting device. The conveying and detecting device comprises a power machine frame assembly. A main rotating tower is arranged in the middle of the power machine frame assembly in a rotating mode. A vertical feeding assembly is arranged on one side of the power machine frame assembly and matched with a threaded rod assembly, the threaded rod assembly is matched with a bottle inlet star wheel assembly, and the bottle inlet star wheel assembly is matched with the main rotating tower. A platform assembly is arranged on the top of the power machine frame assembly, and the bottle inlet star wheel assembly, a bottom crack removal star wheel assembly, a bottle outlet star wheel assembly, a foreign matter and liquid level disqualification removal star wheel assembly, an unqualified bottle body and cap removal star wheel assembly and a second bottle outlet star wheel assembly are all arranged on the platform assembly. The conveying and detecting device has a shooting detection function, can remove bottles with cracks and foreign matter, is good in removal effect, ideal in detection effect and reliable to convey and can conveniently feed, and is quite suitable for conveying and detecting bottled products.

A planar flexible beam unit (1, 40) used for the multi-blade main rotor of a helicopter is an interface between a rotor shaft (2) and the multi-blade main rotor. The planar flexible beam unit (1, 40) comprises a plurality of roughly-planar torque arms (3-7, 41-46), each of the torque arms (3-7, 41-46) has a roughly-concave arc-shaped surface (8) along its radial extension portion, and forms an integral body with its adjacent torque arm (3-7, 41-46). Each of the torque arms (3-7, 41-46) comprises two roughly-straight unidirectional fiber bundles (10-14) obtained through the agglomeration of hard synthetic resin and arranged along the roughly-concave arc-shaped surface (8) of its radial extension portion. Each of the fiber bundles penetrates into two roughly-opposite torque arms (3-7, 41-46), and has no substantial direction change.

The invention relates to the technical field of cosmetics, in particular to a liposome structure for achieving skin cleaning and anti-aging, a composition and a preparation method. The composition iscomposed of liposome A and liposome B which are of different structures according to the weight ratio of 1:1; the liposome A is of a multi-layer liposome structure and is formed in the mode that a wall material wraps a skin cleaning composition, and the component of the wall material of the liposome A is lecithin and soybean phospholipid; the liposome B is of a single-layer liposome structure andis formed in the mode that a wall material wraps a skin anti-aging composition, and the component of the wall material of the liposome B is sphingomyelin, cholesterol, fatty acid, phosphatidylcholineand cholesterol sulfate. According to the liposome structure, the liposome A and liposome B which are different in particle diameter, size and structure are adopted for wrapping the skin cleaning composition and the skin anti-aging composition respectively and applied to the skin surface and the skin deep layer respectively, and through mutual cooperation and promotion of various active substances, the obvious effects of skin cleaning and anti-aging can be achieved.

The invention provides a material transfer device, and further provides a corresponding material transfer method. The material transfer device comprises a transfer track with parallel first and secondwalls, a conveyor belt, a first material waiting mechanism and a second material waiting mechanism. A first gap is formed between the conveyor belt and the first wall, a second gap is formed betweenthe conveyor belt and the second wall, and the conveyor belt is provided with a bearing face which can bear materials. The first material waiting mechanism is provided with a first supporting part which can move in the direction perpendicular to the bearing face and penetrates through the first gap, the second material waiting mechanism is provided with a second supporting part which can move in the direction perpendicular to the bearing face and penetrates through the second gap. The material transfer device can reduce the material siltation caused by the feeding and discharging process, thereby improving the material transfer efficiency; the intelligence degree is high, and the materials can be identified and correspondingly processed; the order of the materials can be exchanged; and theorientation of the materials can be changed.

Systems, devices, and methods for delivering one or more active ingredients to intradermal tissues, deep regions of pores, and intradermal tissues in the vicinity of pores. In some embodiments, a composition is provided including a plurality of liposomes including a cationic lipid, and an amphiphilic glycerophospholipid having a saturated fatty acid moiety and an unsaturated fatty acid moiety, and at least one insulin, insulin analog, or insulin derivative.

The invention relates to a vacuum pump in the vacuum field, in particular to a screw vacuum pump adopting a dry gas seal. The vacuum pump comprises a cavity body, a driving rotor shaft, a driven rotor shaft, a driving rotor, a driven rotor, a transmission unit, a middle frame, the dry gas seal, a labyrinth type seal and a motor, wherein one side of the cavity body is connected with the middle frame; both the driving rotor shaft and the driven rotor shaft are arranged in the cavity body; the driving rotor and the driven rotor are arranged on the driving rotor shaft and the driven rotor shaft respectively; one end of the driving rotor shaft penetrates through the cavity body, the middle frame and the motor successively; one end of the driven rotor shaft penetrates through the middle frame to be connected with the driving rotor shaft through the transmission unit; and the driving rotor shaft and the driven rotor shaft are sleeved with the dry gas seal and the labyrinth type seal in the middle frame successively. According to the dry gas seal screw vacuum pump, a pump cavity is completely isolated from the outside through a combination mode of the dry gas seal and the labyrinth type seal, so that a medium is sealed in the pump cavity completely, and the vacuum pump is applicable to working conditions of poisonous and harmful media of petroleum and chemicals.

The invention discloses a glass fiber reinforced polyolefin tube and a preparation method and application thereof. The glass fiber reinforced polyolefin tube is sequentially provided with a glass fiber modified polyolefin layer, a continuous glass fiber wound reinforcing layer and a polyolefin layer from inside to outside. An outer hot melt adhesive layer and an inner hot melt adhesive layer can be added at two sides of the continuous glass fiber wound reinforcing layer of the glass fiber reinforced polyolefin tube. Through the continuous glass fiber wound reinforcing layer, the using pressure of the glass fiber reinforced polyolefin tube can be greatly improved; and the glass fiber reinforced polyolefin tube is particularly suitable for delivering media such as corrosive and high-pressure industrial water or solvent and the like.

A polyvinyl chloride pipe with radial and/or longitudinal thermal directional shrinking memory function is prepared from polyvinyl chloride through shaping pipe, blocking both ends, arranging it in a limiter, filling high-pressure air in while heating it for expansion, cooling and releasing pressure.

The invention discloses a manufacturing method of fried peanuts. The manufacturing method is characterized by comprising the following steps of: by taking peanuts as raw materials and taking flour, salt and monosodium glutamate as auxiliary materials, firstly, utilizing water of 90 DEG C to immerse the peanuts for 2 minutes and fishing up; sequentially utilizing the flour, the salt and the monosodium glutamate to agitate and mix the immersed peanuts; putting the mixed peanuts into a frying pan of 70 DEG C and frying for 9-12 minutes; fishing up the peanuts; cooling for 5-15 minutes; and finally, packaging. The fried peanuts disclosed by the invention are crispy in mouth feel and are suitable for a snack food; and meanwhile, the fried peanuts are also suitable for being added into various hotels and supermarkets.

The invention discloses an antisludging test kettle and belongs to the technical field of chemical equipment. The kettle comprises an inverse T-type tee joint main body, an end cap flange, a temperature control device and a pressure control device. The end cap flange is arranged on three openings of the tee joint main body; the pressure control device is arranged on a third end cap flange on the top; and the temperature control device is arranged on a second end cap flange on one side thereof. The kettle of the invention has the advantages that the shell materials are PPR which is energy-saving, corrosion resisting, scaling-free, clean, non-toxic, fit for transporting drinking water, heat-resisting, pressure-resisting, and has long service life, light weight and small hydraulic resistance. By using the tee joint as the test main body, the three openings form different working surfaces so the temperature, pressure and overhaul working surfaces are separated mutually and the control and the maintenance are convenient.

The invention relates to a running track device (10) for the movable support of at least one first roller carriage (120) and at least one second roller carriage (130). The running track device includes a first running track profile (20) with a first roller running track (22) for the movable support of the first roller carriage (120). The running track device further includes an attaching portion (24) for the attachment to a wall above a door opening. A second running track profile (30) is included having a second roller running track (32) for the movable support of the second roller carriage (130) and a mounting portion (34) for the attachment of the second running track profile (30) to a counter-mounting portion (26) of the first running track profile (20).