39results about How to "Easy processing and transportation" patented technology

The invention discloses a gabion box ecological gabion river channel slope protection construction method. The gabion box ecological gabion river channel slope protection construction method is mainly characterized in that the defect that only the flood control function, the water diversion function, the drainage function, the impoundment function, the shipping function and the like of a river channel are often considered according to a traditional river channel slope protection structure, and the ecological function of the river channel is rarely considered is overcome. The gabion box ecological gabion river channel slope protection construction method includes the following steps that a cofferdam is constructed, a worktable is arranged, and a footing construction period is carried out; after gabion slope protection construction is over, gaps between surface course dimension stone are recharged with soil and watered, it is ensured that the gaps of dimension stone are filled with soil, and a dimension stone slope is covered by a layer of cultivating and planting soil; aquatic plants are planted underwater, and a lawn is planted on a bank of the river channel. According to a construction technology, water, cement and a formwork are not needed, and construction is convenient. The gaps between building stone can be manually or naturally filled with mud on earth, root systems of the plants can be deeply pricked into the slope through the mud between the building stone, so that engineering measures are combined with vegetation measures, and a soft overall protection face is formed. The requirements for water and soil conservation and environment greening are met, and therefore the original ecological environment is recovered.

The invention discloses a method for preparing aluminum oxide-silicon dioxide flexible aerogel thermal insulation felt. The method includes the following steps that an aluminum source is placed in water for conducting hydrolysis reaction and condensation polymerization to obtain stable aluminum oxide sol; a silicon source, water, alcohol and the aluminum oxide sol are mixed to obtain aluminum oxide-silicon dioxide sol through the hydrolysis reaction and the condensation polymerization under the action of catalysts; the aluminum oxide-silicon dioxide sol is poured to a fiber prefabricated part to form a sol dipped prefabricated part, supercritical drying is conducted on the sol dipped prefabricated part under the condition that the aluminum oxide-silicon dioxide sol is condensed or not, and then the aluminum oxide-silicon dioxide flexible aerogel thermal insulation felt is prepared, wherein the molar ratio of the aluminum source to water is 1:30-300. The method for preparing the aluminum oxide-silicon dioxide flexible aerogel thermal insulation felt is simple in technological process and low in cost.

The invention aims to provide an ultra-fast preparation method for highly transparent aerogel glass. The method comprises using tetraethyl orthosilicate and other silicon source precursors as well as ethanol and other solvents to prepared silica sol; putting the silica sol into a supercritical drying kettle, or pouring the silica sol into a die and putting the die into the supercritical drying kettle; rapidly heating, maintaining pressure and rapidly decompressing to prepare the aerogel glass with good completion. A whole preparation process can be completed in 2 hours, while traditional preparation processes need dozens of hours, and therefore the method greatly shortens time of the preparation process, increases production efficiency and improves yield of the aerogel glass. The aerogel glass prepared by the method has a visible light transmittance of more than 76 %, a density of less than 0.09 g / cm<3>, a thermal conductivity of less than 0.018 W / m*K, and a specific surface area of 800 to 1100 m<2> / g. The aerogel glass is resistant to high temperature, acid and alkali, is a new type of energy-efficient glass, and can be widely used in the fields of building energy efficiency, automobile and high temperature.

The invention discloses an assembling type movable cable holder used for a medium / high-voltage cable line in a long-distance channel. The assembling type movable cable holder used for the medium / high-voltage cable line in the long-distance channel comprises a stand column and a cross arm, wherein the rear wall of the stand column is provided with waist-shaped connection holes; the side wall adjacent to the rear wall is provided with bolt connection holes; the cross arm is provided with bolt connection holes. The assembling type movable cable holder is also provided with a reinforcing plate with bolt connection holes; the stand column and the cross arm are connected and fixed by the reinforcing plate, a gasket and bolts via the bolt connection holes. The cable holder disclosed by the invention has the characteristics of reasonable structure, economical cost, attractive appearance and the like and has obvious advantages on the aspects of processing, packaging, transportation, on-site installation, cable laying, joint arrangement flexibility, intensity stability, economy and the like, and various disadvantages and defects of the traditional holder are eliminated.

The invention relates to an environment-friendly plastic foamed sheet with antistatic and flame-retardant functions and a manufacturing technique thereof. The manufacturing technique comprises the following steps: preparing bamboo carbon powder, kaolin, plastic, antistatic agent, flame retardant and other chemical assistants, banburying, mixing, discharging from a guillotine to obtain a sheet semi-finished product, and foaming to form with a foaming machine. The plastic foamed sheet is prepared from the following raw materials in parts by mass: 5.5-6 parts of plastic, 1.0-1.5 parts of bamboo carbon powder, 1.5-3.5 parts of kaolin, 1.0-2.5 parts of antistatic agent, 1.5-3.5 parts of flame retardant and 0.5-1.0 part of chemical assistants. The manufacturing technique produces the plastic foamed sheet with high-standard antistatic and flame-retardant functions, overcomes the defects and shortcomings in the prior art, has important and profound significance for solving the problems above, and has very wide market potential.

The invention discloses a self-clamping supporting member and a truss using the same. The self-clamping supporting member comprises a strip-shaped plate, wherein at least one clapboard is vertically arranged on one face of the strip-shaped plate, and is distributed at certain intervals along the length direction of the strip-shaped plate; the strip-shaped plate can be folded towards one face of the clapboard and connected into an enclosed structure; and in the folding process of the strip-shaped plate, a chord member is put into a space encircled by the folded strip-shaped plate and the clapboard and is tightly clamped by the strip-shaped plate and the clapboard, so that the truss can be assembled. The chord member is tightly clamped by the member under the action of the friction force ofthe strip-shaped plate and the clapboard (further comprising a baffle plate), so that chord members can be tightly connected with each other without welding, bolts and the like, the quantity of screws is reduced remarkably, and half mechanical and fully-mechanical assembly can be performed conveniently, and the truss assembling efficiency is increased.

The invention discloses a fermented milk spice microcapsule and a preparation method of the microcapsule, the preparation method comprises the following steps: (1) preparing a wall material solution;(2) mixing a core material and the wall material solution to obtain mixed liquor; (3) performing homogenization treatment on the mixed liquor to obtain an emulsion; (4) performing spray drying on theemulsion to obtain the fermented milk spice microcapsule. The fermented milk spice microcapsule prepared by the preparation method has unique acid flavor and milk flavor, and effectively reduces the loss of aroma components during storage by embedding the wall material, has the advantages of good stability, safety and non-toxicity, and can directly add to foods such as beverages, dairy products, ice cream and candies; the fermented milk spice microcapsule can also be used as a base material for production of fermented milk essence to meet needs of food processing. Compared with general mixing-type fermented milk spice, the fermented milk spice microcapsule obtained by the preparation method has the advantages of pure aroma, rich fermentation, wide application range, convenient storage andtransportation, and good stability, etc.

The invention discloses a hydraulic bearing-type riser universal joint device which comprises a universal joint body. A wing plate at the middle part of the body is provided with a plurality of hydraulic cylinders on the periphery in a uniform and fixing manner; the axis of a piston of each hydraulic cylinder is fixedly provided with a guide seat; each guide seat is connected with a guide shaft; the upper ends of all the guide shafts are fixedly connected with a hydraulic cylinder connection plate; the hydraulic cylinder connection plate is fixedly connected with a chuck connection plate through bolts; oil inlets of all the hydraulic cylinders are communicated with an accumulator. The device disclosed by the invention has a simple structure, is convenient and rapid to operate, has reliable service life, is easy to produce and manufacture, convenient to install and disassemble, applied to the condition that an offshore drilling riser or a production riser is horizontally deflected under the action of waves and streams, and is platform deck equipment capable of realizing a deflection balancing function.

The invention discloses a low-sugar passion fruit full-fruit jam and a preparation method thereof. Passion fruit peel slurry and juice are mixed, blended, heated and concentrated, a sweetening agent and a thickening agent are added in batches to decoct required solid content, and then, the required solid content is canned, exhausted, sterilized, cooled and checked to obtain a finished product. Thejam used for processing has the advantages of variable shape, high adhesion and peculiar taste, and can be used as auxiliary food for processing products including stuffing jam, baked jam and the like; the smeared jam has the advantages of good taste and elasticity and aromatic flavor and is pliable and smooth. By use of the passion fruit full fruit, the additional value of the passion fruit is greatly increased, the waste of fruit peel resources is reduced, the research of the low-sugar passion fruit full-fruit jam refreshes the traditional concept of people for the jam, and the healthy newjam is provided.

The invention discloses an automatic soldering iron device. The automatic soldering iron device comprises a power supply device, a handheld part and a welding head connected with the lower end of thehandheld part. A heating device used for melting iron materials is arranged at the welding end of the welding head. The middle portion of the handheld part is of a cavity structure. The automatic soldering iron device further comprises a soldering tin block, a cutting device and a pushing device, wherein the soldering tin block is arranged in the cavity structure, the cutting device is arranged atthe bottom of the welding end of the welding head, and the pushing device is arranged in the cavity structure. The lower end of the handheld part is rotatably connected with the welding head in a buckled mode. According to the automatic soldering iron device, the welding head is inserted into a to-be-welded object, welding work can be completed by a worker with a single hand, rapid welding can beachieved, and meanwhile, the problem of cutting-off of redundant weld materials is solved.

The invention discloses a first-class standard metal measuring instrument, the main body of which is formed by connecting the upper part of the measuring instrument and the lower part of the measuring instrument. The top of the upper part of the measuring instrument is connected with an overflow device. The overflow device includes a and the casing of the overflow pipe, the upper opening of the overflow pipe is set in the casing and is not lower than the water outlet at the top of the gauge, the lower opening of the overflow pipe is set outside the casing; there is also a Bending, the bending position is lower than the water outlet at the upper top of the measuring device, and an overflow hole is arranged at the bending position. The overflow device adopted in the present invention avoids the error caused by artificially observing the liquid level scale of the metering neck, and improves the measurement accuracy; it is easier to process and transport, and it is convenient to disassemble the measuring device for cleaning; the measurement accuracy and repeatability are improved, and the annular hard seal is more accurate. It is easy to ensure the sealing performance; the imported three-way valve is used to avoid the error caused by the switching valve; the platinum resistance temperature measuring device is used, which has the advantages of high precision and short response time.

The present invention provides a construction of a connecting joint between a local laminated slab and a combined wall column. The construction comprises a combined wall column and a local laminated slab. The combined wall column is provided with a supporting plate. The supporting plate is provided with a rib plate. The rib plate is provided with openings. An end portion of the local laminated slab is disposed on the supporting plate. The openings are provided with penetrating ribs. A steel bar on the local laminated slab extends from the side of the penetrating rib to between the penetrating rib and the combined wall column. The construction of the node can cancel a reserved overhanging steel bar for facilitating processing and transportation.

The invention provides a structure of a connection joint between a local laminated slab and a composite wall column. The structure includes the composite wall column and the local laminated slab. A supporting plate is arranged on the composite wall column. A ribbed slab is arranged on the supporting plate. The ribbed slab is provided with holes. The end of the local laminated slab is arranged on the supporting plate. Through ribs are arranged in the holes. Steel bars on the local laminated slab extend from the side of the through ribs to between the through ribs and the composite wall column.The structure of the joint can cancel the reservation of extension steel bars and facilitates the processing and transportation.

The invention belongs to the technical field of glass processing, and particularly relates to a device for smashing automobile glass. The device for smashing automobile glass includes a rack and a shell; a motor is fixed to the rack, a vertically arranged drive shaft is connected to the motor, a cam and a belt wheel are arranged on the drive shaft, a spline is slidably connected to the rack, one end of the spline abuts against the end, away from the axis, of the cam, a baffle block is arranged on the rack, and the other end of the spline is connected with the baffle block through a spring; a gear is rotatably connected to the rack, a threaded rod is coaxially arranged on the gear, a protrusion is arranged on the threaded rod and is slidably connected with a sliding groove formed in the gear, the threaded rod is in thread fit with a nut fixed to the rack, a rotation shaft is rotatably connected to one end of the threaded rod and is in a circular truncated cone shape, the threaded rod and the belt wheel are driven through a belt, a smashing shaft is coaxially arranged on the rotation shaft and stretches into the shell, a plurality of smashing rods are hinged to the smashing shaft, and gravity blocks are arranged at the ends of the smashing rods. The device for smashing automobile glass can uniformly smash glass, and therefore subsequent transport is convenient.

The invention relates to a testing device and testing method for a vertical anti-uplifting test of a spiral ground anchor. The testing device is composed of a counterforce system, a loading system and a measuring system, wherein the counterforce system is commonly composed of a central counterforce beam, a bottom supporting beam, a force transmission beam column and a bracing piece, and a positioning beam, and is used for bearing the counterforce in the loading process; the loading system is composed of a jack and a cushion block, a supporting top plate, a pile head connecting piece and a continuous screw rod, and is matched with the counterforce system to apply vertical uplifting load to a spiral ground anchor pile head; the measuring system is composed of a pressure sensor, a displacement meter and a standard beam and is used for determining the size of the applied load and pile head displacement of the spiral ground anchor under each grade of load effect. The testing method for the vertical anti-uplifting test of the spiral ground anchor comprises the following steps: positioning a counterforce bracket based on the testing device for the vertical anti-uplifting test; then applying an uplifting force to the spiral ground anchor by utilizing the continuous screw rod, the supporting top plate and the pile head connecting piece; bearing the uplifting counter forceby the counterforce bracket to obtain pile head displacement of the spiral ground anchor under each grade of the load effect; and judging an anti-uplifting bearing force of the spiral ground anchor through a displacement loading curve.

The invention relates to a traction driving pile driver and a self-propelled traction driving pile driver. The traction driving pile driver comprises a main pile frame, a traction mechanism, a hammer body and a hammer disengaging device; the main pile frame is provided with a first pile chamber and a second pile chamber which are longitudinally separated; the traction mechanism comprises a traction wheel, a pulley block, a traction rope and a traction balance weight, and the traction balance weight is arranged in the second pile chamber and connected with the side portion of the second pile chamber in a sliding mode; the traction wheel is arranged at the top of the main pile frame, the traction rope is wound around the traction wheel and the pulley block, and one end of the traction rope is connected with the traction balance weight; the hammer body and the hammer disengaging device are arranged in the first pile chamber and are in sliding connection with the side portion of the first pile chamber; and the other end of the traction rope is connected with the hammer disengaging device, the hammer body is arranged below the hammer disengaging device, and the hammer body can be connected with or disengaged from the hammer disengaging device. The multifunctional pile driver is simple in structure, low in production cost, low in noise, energy-saving, environment-friendly, good in maneuverability, capable of independently conducting transition, displacement, pile erecting, pile replacing and other work, capable of achieving multiple purposes and capable of replacing an existing pile driver to be commonly used in urban and rural construction.

The invention discloses a dust detecting and screening device. The device comprises a base and a dust removing box, a rotating shaft is arranged in the dust removing box, a screening mesh cylinder sleeves the rotating shaft, a lifting machine is arranged on the outer side of the dust removing box, a feeding pipe is arranged on the lifting machine, and the feeding pipe penetrates through a sealingcover to communicate with the dust removing box; the screening mesh cylinder comprises screening mesh plates, supporting rods and two fixing plates, the screening mesh plates and the supporting rods are connected between the two fixing plates in a bridging mode, feeding holes are formed in the tops of the screening mesh plates, each supporting rod is hollow, air outlet holes are formed in the sidewalls of the supporting rods, the end parts of the supporting rods are connected with guide pipes, and the guide pipes communicate with air bags arranged on the inner side wall of the dust removing box; a section of transparent pipe is introduced into the portion, close to the sealing cover, of the feeding pipe, a branch pipe communicates with the lower side surface of the transparent pipe, the upper side surface of the transparent pipe is correspondingly provided with a light-emitting device and a photoelectric conversion device, the photoelectric conversion device is connected with an ampere meter, the ampere meter is connected with a regulating valve, and the regulating valve controls closing of the branch pipe and the feeding pipe. According to the device, whether dust in grain exceeds the standard or not can be detected, and automatic dust removing can be carried out after the standard-exceeding judgment is made.

The invention discloses a Kara OK-V shaped connecting plate, which comprises a connecting plate body, wherein the connecting plate body comprises at least one rhombic or square connecting unit; the connecting unit comprises four connecting edges; a web plate is arranged in the middle of each connecting edge; the connecting plate body can be folded along preset fold lines and then connected into a closed structure; and two sides of the web plates are perpendicular to the corresponding connecting edges. The connecting plate body has a rhombic or square structure, the conventional strip plate is changed into the connecting plate body with the V-shaped structure, and each chord member is clamped and fixed with two connecting edges of the connecting plate body, so that the contact area between the connecting plate body and each chord member can be effectively enlarged, the chord members can be tightly clamped and fixed, and the stress strength of the connecting plate body can be increased.

The present invention provides a transparent conductive film capable of suppressing the occurrence of curl even after a heating process in a transparent conductive film laminate in which a thin glass substrate is bonded to the transparent conductive film, and ensuring a finished product in the subsequent process. rate, and provide transparent conductive film laminates and touch panels. In the transparent conductive film (10) of the present invention, the first cured resin layer (2) and the transparent conductive film (3) are sequentially formed on one side of the transparent resin film (1), and on the other side of the transparent resin film (1) A transparent conductive film (10) with a second cured resin layer (4) is formed on the side, the transparent resin film (1) of the transparent conductive film (10) includes an amorphous resin, and the transparent conductive film (10) Cut into 50cm x 50cm, make transparent conductive film (3) as the bottom surface, and heat at 130°C for 90 minutes. The difference between the average curl value A of the four corners and the curl value B of the center, that is, A-B, is 5 mm or more .

The invention discloses an embellished antenna based on plastic optical fibers. The embellished antenna comprises an antenna body, a shell (1) and a plastic optical fiber layer, the antenna body is fixedly arranged inside the shell (1), and the plastic optical fiber layer is arranged outside the shell (1) and comprises the plastic optical fibers (2) attached to the outside of the shell (1). The invention further discloses a method for manufacturing the embellished antenna. The method includes the steps: S1, attaching the plastic optical fibers (2) to the outside of the shell (1); and S2, connecting the plastic optical fibers (2) with a luminous source. The embellished antenna has the advantages that the embellished antenna has an excellent decoration effect and is high in wave permeability, low in dielectric constant, light in weight, easy to machine and transport and convenient to mount, night embellishment of the embellished antenna built in a scenic area, an urban area and other places with high landscaping requirements is realized, the plastic optical fibers are simple in wiring and can be freely assembled into various patterns, and the embellished antenna is high in adaptability to environments, attractive in appearance, firm in structure and stable and reliable in performance.

The invention relates to the technical field of reinforced concrete structure mechanical property testing, and in particular relates to a combined one-way hinge for a right-angle test piece loading test. The combined one-way hinge comprises a right-angle wing assembly, a roller shaft and a support seat assembly; the right-angle wing assembly comprises a right-angle plate, a first groove componentand a plurality of first reinforcing rib plates arranged between the right-angle plate and the first groove component; the opening of the right-angle plate and the opening of the first groove component are arranged back to back, and the right-angle plate and the first groove component are arranged in a centering mode; the support seat assembly comprises a base plate, a pier base, a second groove component and a plurality of second reinforcing rib plates arranged between the pier base and the second groove component; the opening of the first groove component and the opening of the second groovecomponent are oppositely arranged; and the roller shaft is arranged between the first groove component and the second groove component and abuts against the groove bottom of the first groove component and the groove bottom of the second groove component. The eccentric bending moment of the test piece restrained by the clamped support is eliminated through one-way hinge loading, and the test precision is greatly improved.

The invention discloses stone ore classification and collection equipment. The equipment comprises a crushing box, and a working cavity is formed in the crushing box in a left-right penetrating mode.A conveying mechanism is arranged in the working cavity, and the conveying mechanism comprises a first conveying shaft rotationally arranged on the rear end wall of the working cavity. A transmissionmechanism is arranged in the working cavity; the transmission mechanism comprises a fixed block fixed on the upper end wall of the working cavity; a vertical cavity is formed in the upper end wall ofthe working cavity in an up-down penetrating manner; a crushing mechanism is arranged in the vertical cavity; the crushing mechanism comprises a moving cavity which is formed in the right end wall ofthe vertical cavity and is provided with a leftward opening. The device can quickly crush stones, facilitates transportation of the stones, reduces labor loss, can classify the stones according to theshapes and sizes of the stones, facilitates subsequent processing and transportation of the stones, standardizes a classification method, and greatly reduces classification time.

The present invention disclosed a karaoke-V-type connecting board, including the connecting board body, which includes at least one diamond-shaped or square connecting unit, which includes four connected edges, each connected edge edgeThe middle part is equipped with a abdominal plate, which can be connected to a closed structure along the preset turning lines, which can be vertically vertically vertically with the corresponding connection edges on both sides of the abdomen.By setting the connection board body to a diamond -shaped or positive structure, the existing strip board form is improved to the connecting board body with a V -shaped structure.It can not only effectively increase the contact area with the string rod, so that the string rod can be fixed tightly by closer stuck, but also increase the stress intensity of the connecting panel body.

The invention discloses a self-clamping supporting member and a truss using the same. The self-clamping supporting member comprises a strip-shaped plate, wherein at least one clapboard is vertically arranged on one face of the strip-shaped plate, and is distributed at certain intervals along the length direction of the strip-shaped plate; the strip-shaped plate can be folded towards one face of the clapboard and connected into an enclosed structure; and in the folding process of the strip-shaped plate, a chord member is put into a space encircled by the folded strip-shaped plate and the clapboard and is tightly clamped by the strip-shaped plate and the clapboard, so that the truss can be assembled. The chord member is tightly clamped by the member under the action of the friction force ofthe strip-shaped plate and the clapboard (further comprising a baffle plate), so that chord members can be tightly connected with each other without welding, bolts and the like, the quantity of screws is reduced remarkably, and half mechanical and fully-mechanical assembly can be performed conveniently, and the truss assembling efficiency is increased.

The invention discloses a hydraulic bearing-type riser universal joint device which comprises a universal joint body. A wing plate at the middle part of the body is provided with a plurality of hydraulic cylinders on the periphery in a uniform and fixing manner; the axis of a piston of each hydraulic cylinder is fixedly provided with a guide seat; each guide seat is connected with a guide shaft; the upper ends of all the guide shafts are fixedly connected with a hydraulic cylinder connection plate; the hydraulic cylinder connection plate is fixedly connected with a chuck connection plate through bolts; oil inlets of all the hydraulic cylinders are communicated with an accumulator. The device disclosed by the invention has a simple structure, is convenient and rapid to operate, has reliable service life, is easy to produce and manufacture, convenient to install and disassemble, applied to the condition that an offshore drilling riser or a production riser is horizontally deflected under the action of waves and streams, and is platform deck equipment capable of realizing a deflection balancing function.

An exposed type column base joint component for mounting a steel column comprises a square steel bottom plate (1), a set of vertical square steel pipes (2) which are arranged in the middle of the steel bottom plate and arrayed orderly in a grid shape, a set of isosceles trapezoid stiffening plates (3) which are transversely inserted between every two adjacent square steel pipes in a penetrating mode and of which the lower bottoms are arranged on the steel bottom plate, a set of right trapezoid stiffening plates (4) which are longitudinally inserted between every two adjacent square steel pipesof the square steel pipes in the front and rear rows and of which the lower bottoms are arranged on the steel bottom plate, a set of rectangular stiffening plates (5) which are longitudinally inserted between every two adjacent square steel pipes of the square steel pipes in the middle row and of which the lower bottoms are arranged on the steel bottom plate, and anchor holes (6) which are uniformly formed in the periphery of the steel bottom plate and used for mounting foundation bolts. The column base joint component is high in construction mounting accuracy, capable of being flexibly adjusted, easy to operate, rapid in operation and capable of effectively solving the problems that in the mounting welding processes of the column base stiffening plates, deviation is liable to occur, thesections of column bases are large, and mounting is difficult.

The present invention relates to a combined one-way hinge for the loading test of right-angled specimens, which relates to the technical field of mechanical performance testing of reinforced concrete structures, and includes a right-angle wing assembly, a roller shaft and a support seat assembly; the right-angle wing assembly includes a right-angle plate, a first concave The groove member and a plurality of first reinforcing ribs arranged between the right-angle plate and the first groove member, the opening of the right-angle plate is opposite to the opening of the first groove member and the right-angle plate is centered with the first groove member Arrangement; the supporting seat assembly includes a base plate, a podium, a second groove member, and a plurality of second reinforcing ribs arranged between the abutment and the second groove member; the opening of the first groove member and the second groove The openings of the components are oppositely arranged, and the roller shaft is arranged between the first groove component and the second groove component and abuts against the groove bottom of the first groove component and the groove bottom of the second groove component. The one-way hinge loading of the invention eliminates the eccentric bending moment of the test piece constrained by the fixed support, and greatly improves the test accuracy.

The invention relates to an environment-friendly plastic foamed sheet with antistatic and flame-retardant functions and a manufacturing technique thereof. The manufacturing technique comprises the following steps: preparing bamboo carbon powder, kaolin, plastic, antistatic agent, flame retardant and other chemical assistants, banburying, mixing, discharging from a guillotine to obtain a sheet semi-finished product, and foaming to form with a foaming machine. The plastic foamed sheet is prepared from the following raw materials in parts by mass: 5.5-6 parts of plastic, 1.0-1.5 parts of bamboo carbon powder, 1.5-3.5 parts of kaolin, 1.0-2.5 parts of antistatic agent, 1.5-3.5 parts of flame retardant and 0.5-1.0 part of chemical assistants. The manufacturing technique produces the plastic foamed sheet with high-standard antistatic and flame-retardant functions, overcomes the defects and shortcomings in the prior art, has important and profound significance for solving the problems above, and has very wide market potential.

The invention provides a rotary cutting device used for machining of metal pieces. The rotary cutting device used for machining of metal pieces comprises a bottom board; a supporting column is arranged on the bottom board; a pipe conveying barrel is arranged at the end of the supporting column; a guide barrel is arranged on the bottom board; a lifting barrel is sleeved with the guide barrel; a lifting board is arranged at the end of the lifting barrel; a drive motor is arranged on the lifting board and connected with a drive pipe; a drive rod is sleeved with the drive pipe; the drive rod and a rotary pipe are connected through threads; a rotary cutting wheel is arranged at the end of the drive rod; a rotary cutting knife ring is arranged on the peripheral face of the rotary cutting wheel; and the rotary cutting knife ring is located in front of the pipe conveying barrel. A metal piece to be machined can be sleeved with the pipe conveying barrel and can be horizontally conveyed along the pipe conveying barrel, so that the metal piece is convenient to convey and machine; and the drive motor can control the drive rod through the drive pipe to achieve rotation, then the rotary cutting wheel is conveniently controlled to rotate, and the rotary cutting knife ring conveniently conducts rotary cutting machining on the metal piece.