57results about How to "Consistent shape" patented technology

The invention relates to the field of building material detection, in particular to a quality evaluation method based on low-water-binder-ratio concrete, which comprises the following steps: acquiring a low-water-binder-ratio concrete sample, confirming a sample detection environment based on the low-water-binder-ratio concrete sample, performing cutting operation on the low-water-binder-ratio concrete sample by using a table-type cutting machine, and determining the quality of the low-water-binder-ratio concrete sample. Calculating an intensity value by using a drying tester and a burning tester; calculating a penetration value by using a penetration controller and a penetration tester; starting an ultrasonic sensor; calculating a loss value by using a sending voltage and a receiving voltage; and constructing a concrete quality evaluation model based on a regression analysis result, substituting the strength value, the permeation value and the hydration value into the concrete quality evaluation model to calculate an evaluation value, and completing quality evaluation of the concrete with the low water-binder ratio. According to the invention, the detection speed and accuracy of the low-water-binder-ratio concrete can be improved.

The invention discloses a point-pouring injection automatic dehydration mouth heel iron nail heel lift mold which comprises a mold frame and mold cores arranged on the mold frame and used for pouring shoe nails, a mold jacking device is arranged below the mold frame, the mold cores are provided with a plurality of pouring grooves, the bottoms of the pouring grooves are communicated with heel nail holes for containing heel nails, the mold cores are divided into the first mold core and the second mold core, and the first mold core and the second mold core are communicated with each other. A pouring channel used for achieving pouring is arranged between the first mold core and the second mold core, a circulation hole is formed in the end face, communicated with the heel nail hole, of the pouring channel, an inner mold frame is detachably connected to the lower portions of the mold cores, the first mold core and the second mold core are detachably connected to the inner mold frame, and the inner mold frame can separate the first mold core from the second mold core. The die core enables the notch to be formed in the end face of the end, close to the heel nail, of the heel block through the circulation hole. Relative movement of the first mold core and the second mold core can be achieved through the inner mold frame, the rubber column in the pouring channel is separated from the mold core, the shoe tacks and the rubber column are ejected out through the mold ejecting device, and efficient production of the shoe tacks is achieved.

The utility model relates to the technical field of wind power blade machining, in particular to a pressure-maintaining supporting tool which comprises an operation support, a pressure-maintaining supporting device and a pressure-maintaining supporting device. The pressure maintaining device is placed on the operation support, a plurality of pressure plates are arranged in the pressure maintaining device, and the shape of the pressure maintaining device is consistent with that of the wind turbine blade. According to the utility model, the operation bracket is stably placed at a proper position, and the two operation platforms mounted on the operation bracket are positioned on the two opposite sides, so that an operator can conveniently approach the wind power blade from the two sides, and stairs are also arranged in order to facilitate the operator to go up and down; the shape of the pressure maintaining device is consistent with that of the wind power blade, so that the stability of the wind power blade on the pressure maintaining device is ensured; after the wind power blade is placed properly, the pressure maintaining device is started, a plurality of pressure plates in the pressure maintaining device start to work, and uniform pressure is applied to the wind power blade according to preset parameters. The shape consistency also improves the manufacturing precision of the wind power blade; and by arranging the operation platform and the stairs, the safety risk is reduced.

The invention discloses a mold capable of continuously stamping and cutting profiles, and belongs to the technical field of stamping molds. The mold comprises: a feeding mechanism, which is connected to a lower mold and used for conveying profiles; a stamping mechanism, which comprises a concave mold and a convex mold, wherein the concave mold is connected to an upper mold and provided with a groove, and the convex mold is connected to a lower mold, and the concave mold and the convex mold are arranged in correspondence with each other up and down, and when the upper mold and the lower mold are closed, the convex mold extends into the groove and stamps the profile; a cutting mechanism, which is connected to the upper mold, and the cutting mechanism and the stamping mechanism are arranged in correspondence with each other front and back, and the cutting mechanism is used for cutting the profile formed by the previous stamping. By adjusting the height of the closed mold, after each stamping work, a connection point is retained between the part of the profile that has been stamped and the profile to be processed, thereby ensuring that after the profile is stamped, the feeding mechanism can still feed continuously, and the purpose of continuous feeding is achieved without adding additional devices to assist, which not only saves production costs, but also reduces the occupied space of the entire device.

The connector inner hole chamfering machining device comprises a bottom supporting support, a mounting base plate is arranged on the upper surface of the bottom supporting support, a connector containing base is arranged on the mounting base plate, and the connector containing base comprises a vertical supporting support, a guide plate mounting frame, a bar guide plate and a discharging assembly. By means of the design of the automatic discharging assembly, regular and quantitative supply of bars is achieved, frequent manual material adding is avoided, the labor intensity of workers is reduced, the production efficiency is improved, and the requirement for batch production and large-scale production is met; through cooperative work of the inner hole machining assembly and the connector positioning mechanism, the dynamic precision and the repeated positioning precision in the machining process are ensured, errors caused by manual operation are reduced, and the requirements of the modern manufacturing technology for high precision and high efficiency are met. And by adjusting the angle of the trimming assembly, different inner hole machining positions and requirements can be met, and the adaptability of equipment is improved.

The invention relates to a beam-slab composite lattice structure, in particular to a beam-slab composite lattice structure with a non-uniform-thickness skin and a preparation process of the beam-slab composite lattice structure, and solves the technical problems that an existing beam-slab composite lattice structure is insufficient in light weight degree, and the skin and unit cell design is relatively split. According to the beam-slab composite lattice structure, the skin is non-uniform in thickness, the thickness of the skin and the diameter of the supporting beam of the unit cell are related to the stress of the corresponding position of the skin, and the rigidity of the structure is improved. By adjusting the thickness of the unit cell skin of the composite unit cell, the lightweight degree of the structure can be further improved. And meanwhile, the transition platform is arranged between the two adjacent unit cell skins, so that the connectivity of the adjacent composite unit cells can be enhanced and the stress concentration effect can be reduced while the lightweight requirement of the structure is met. The invention further provides a preparation process of the beam-slab composite lattice structure with the non-uniform-thickness skin, and synchronous integrated gradient design of the skin layer and the unit cell layer can be achieved.

The invention discloses a machining method of a titanium alloy shell, and belongs to the technical field of titanium alloy machining. The machining method comprises the following steps that S1, material picking is conducted, specifically, raw materials for machining the titanium alloy shell are picked according to marks; s2, heat treatment: carrying out heat preservation on the raw materials at 750 + / -10 DEG C for 1-2 hours, and carrying out furnace cooling; s3, multiple turning 1: flattening an end face, turning an outer circle and an inner hole, and keeping the allowance of 1mm on a single face; after completion, clamping and aligning the reverse side, leveling the total length, turning an inner hole, and keeping the margin of 1mm on a single side; s4, annealing: keeping the temperature of the material after turning at 600 + / -20 DEG C for 1-2 hours, and cooling along with the furnace; s5, second turning is conducted, specifically, clamping and alignment are conducted, the end face is flattened, the outer circle is turned till all the faces are shiny, and the jump is smaller than 0.03; finely turning an inner hole and an end surface; s6, numerical turning 3: turning an outer circle; s7, numerical milling: milling a threaded hole and a notch; s8, deburring is conducted; s9, performing inspection; and S10, the titanium alloy shell finished product is kept at the temperature ranging from-60 DEG C to-120 DEG C for 1-2 hours. According to the scheme, the problem that internal stress is prone to occurring in the existing titanium alloy shell machining process is solved.

The utility model relates to the technical field of aluminum plate machining, in particular to an arc-shaped aluminum plate punching machine. The arc-shaped aluminum plate punching machine comprises a box body, a collecting assembly is arranged on the inner bottom wall of the box body, a shell is fixedly connected to one side of the upper portion of the box body, a clamping assembly is arranged on the inner side of the shell, an aluminum plate body is installed on the inner side of the clamping assembly, and a connecting block is fixedly connected to one side of the top end of the box body. A hydraulic push rod is installed on one side of the bottom end of the connecting block, a threaded column is fixedly connected to the output end of the hydraulic push rod, a replaceable punching block is in threaded connection to the side face of the threaded column, a protective shell is fixedly connected to one end of the shell, and a supporting column is fixedly connected to the bottom end of the box body. The arc-shaped aluminum plate punching machine has the advantages that the arc-shaped aluminum plate punching machine can adapt to aluminum plates with different lengths and is stable in clamping, and machined finished products can be conveniently collected.

The six-cell packaging box comprises a first body plate, a second body plate, a third body plate, a fourth body plate and a bonding head, the second body plate and the bonding head are arranged at the two ends of the first body plate respectively, the third body plate is located at one end of the second body plate, and the fourth body plate is located at one end of the third body plate. The first body plate, the second body plate, the third body plate and the fourth body plate define a box body, and the bonding head and the fourth body plate are bonded together; a first bottom plate is arranged at one end of the first body plate, a second bottom plate is arranged at one end of the second body plate, a third bottom plate is arranged at one end of the third body plate, a fourth bottom plate is arranged at one end of the fourth body plate, and the first bottom plate, the second bottom plate, the third bottom plate and the fourth bottom plate are clamped to form a box bottom. The packaging box has the following beneficial effects that the packaging box has a folded storage state and an unfolded state and can be switched between the two states, and reuse is not affected after switching.

The invention discloses an engineering plastic crushing device, which relates to the technical field of crushing devices, and comprises a crushing frame, a feeding device and a crushing device, wherein a feeding frame is fixedly installed on the top of the crushing frame, an arc panel is fixedly installed on the surface of the feeding frame, a discharge hole is opened on the surface of the crushing frame, a control panel is slidably installed on the surface of the crushing frame, a dust collecting device is fixedly installed on the surface of the control panel, wherein the feeding device comprises a feeding hole, a sliding block, a rotating plate, a feeding plate, a displacement plate, a load-bearing rod and a supporting rod, after the limit of the feeding plate is released, it is squeezed by the plastic on the top to generate rotation, the feeding plate rotates to release the seal of the feeding frame, after the seal of the feeding frame is released, the quantitative plastic on the top of the feeding plate enters the crushing frame through the feeding frame to be crushed, and the quantitative feeding can prevent too much or insufficient plastic from entering the crushing device, reduce the load and wear of the equipment, and extend the service life of the equipment.

The invention discloses a high-speed plastic vacuum forming machine, and relates to the technical field of plastic vacuum forming machines, the high-speed plastic vacuum forming machine comprises two groups of mounting racks which are arranged in parallel front and back, connecting frames are fixedly connected to the left and right ends between the two groups of mounting racks, a fixing column is fixedly connected to the right side between the two groups of mounting racks, and feeding grooves for feeding are fixedly connected to the inner sides of the two groups of mounting racks; a mounting column is fixedly connected to the lower portion between the two mounting frames, a vacuum pump is fixedly mounted above the mounting column, a forming assembly is arranged between the two mounting frames and on the left side of the heating assembly, and a cutting assembly is arranged between the two mounting frames and on the left side of the forming assembly; and a stacking assembly is fixedly mounted between the two mounting frames and on the left side of the cutting assembly. The full-automatic plastic uptake machine has the advantages that multiple functions of feeding, heating, plastic uptake, cutting and stacking are integrated, and the high-speed, high-efficiency and high-quality production requirements can be met.

The invention discloses silver powder and a large-scale production method thereof, and belongs to the technical field of silver powder preparation. The production method comprises the following steps: preparing a part of dispersing agent solution and a part of reducing agent solution into a base solution; simultaneously adding the silver source solution and the residual reducing agent solution into the base solution through a first flow path and a second flow path respectively, wherein the total adding time of the silver source solution and the residual reducing agent solution is t1; after the adding duration of the silver source solution and the residual reducing agent solution is t2, the residual dispersing agent solution is added through a third flow path, and the total adding duration of the residual dispersing agent solution is t3; after the silver source solution is completely added, adding a surfactant solution; wherein t1 = t2 + t3. According to the method, the problems of silver powder particle aggregation and obvious particle size in the production process can be effectively avoided, and stable and large-scale production of the superfine silver powder can be achieved under the condition that the high yield is kept. The obtained silver powder is narrow in particle size distribution, consistent in morphology and good in quality.

The suspensible packaging box with the lining comprises a bottom plate, a first side plate, a second side plate, a third side plate and a fourth side plate, the bottom plate is a rectangular bottom plate, and the first side plate, the second side plate, the third side plate and the fourth side plate are arranged on the peripheral edges of the bottom plate correspondingly; the first side plate and the second side plate are located at the two ends of the bottom plate respectively, the third side plate is located between the first side plate and the second side plate, the fourth side plate is located between the first side plate and the second side plate, a third cover plate assembly is arranged on the third side plate, and a fourth cover plate is arranged on the fourth side plate. A first attaching plate is arranged on the first side plate, and a first supporting plate is arranged on the first attaching plate. Compared with the prior art, the packaging box has the following beneficial effects that the first square lining pipe and the second square lining pipe are arranged on the bottom plate in a bonding mode, a lining does not need to be additionally arranged when the whole packaging box is used, the lining cannot fall off from the packaging box, and the packaging box is more stable and reliable in use.

The application relates to the technical field of metal material surface strengthening, in particular to a self-adaptive laser shock peening method and system based on light path dynamic regulation and real-time monitoring. The method comprises the following steps: preprocessing and constructing a digital twin model, dividing different curvature processing areas and presetting peening parameters; dynamic focusing galvanometer and beam shaper are cooperated to ensure that laser is vertically incident and the spot shape and area are constant; an adjustable nozzle adaptively supplies a constraint layer, an ultrasonic sensor real-timely monitors water film thickness and feeds back adjustment; a high-speed spectrometer and an acoustic sensor collect multiple signals, plasma parameters are inversely deduced to evaluate the shock effect, energy compensation is triggered when an abnormality occurs, and closed-loop control is formed. The system corresponds to three-dimensional scanning, digital twin processing, dynamic beam adjustment, constraint layer supply, quality monitoring module and a control system. The method and system are suitable for complex curved surface workpieces, improve peening uniformity and stability, and are suitable for high-precision peening processing of materials such as titanium alloy.

The utility model discloses a kind of multi-effect synergic anti-wrinkle non-deformation pearl plush forming device, belong to pearl plush processing technical field, its technical scheme main points include support frame, the inner side of the support frame is provided with conveying mechanism, hot setting mechanism is welded in the both sides of support frame top, the hot setting mechanism includes mounting bracket, screw rod, threaded sleeve, servo motor, connecting rod, rotating roller, several heating rods, setting roller and temperature sensor, heating rod in hot setting mechanism is evenly distributed in rotating roller surface, cooperate temperature sensor real-time monitoring temperature, and adjust through PLC feedback, ensure that setting roller surface temperature is stably in optimum range, both guarantee that fabric fiber is fully set, avoid damage or deformation caused by overheating, setting roller is driven screw rod to adjust height by servo motor, can be flexibly adjusted with the interval of conveying belt according to fabric thickness, ensure that pressure is uniform, make the texture of pearl plush surface set clear, form consistent, improve product appearance texture.

The feeding and slivering mechanism comprises a feeding cylinder, a feeding bin, a feeding turning plate, a slivering bin, a spiral propeller and a slivering template, a feeding port is formed in the upper end of the feeding cylinder, the lower end of the feeding cylinder is connected with the feeding bin, the feeding turning plate is arranged in the feeding bin and comprises a rotating shaft and a cross-shaped turning plate, the rotating shaft is connected with the spiral propeller, and the slivering bin is connected with the spiral propeller. The cross-shaped turning plate is fixedly installed on the rotating shaft, the two ends of the rotating shaft are rotationally connected with the side wall of the feeding bin, the bottom of the feeding bin is connected with the slivering bin, the spiral propeller is arranged in the slivering bin, the slivering template is arranged at the front end of the spiral propeller, and the guide groove is formed below the slivering template. According to the utility model, the problems of insufficient stock bin material filling and insufficient strip making pressure caused by unstable material returning and feeding in the feeding process of the feeding turning plate can be solved, and uniform strip discharging and consistent pill shape and weight are ensured.

The application relates to a layer-by-layer manufacturing method of a dense permanent magnet, which comprises the following steps: 1) laying a layer of samarium iron nitride powder on the bottom of a lower mold; 2) vibrating the powder layer; 3) applying downward mechanical pressure on the powder by a pressing block to compact the powder; 4) using ultra-short laser pulses to impact the compacted samarium iron nitride powder with a certain coverage rate to solidify the samarium iron nitride powder layer; 5) laying a next layer of samarium iron nitride powder on the surface of the impacted samarium iron nitride material, and re-executing steps 2) to 4) to solidify the samarium iron nitride powder of the current layer by using the ultra-short laser pulse impact; and 6) repeatedly executing steps 2) to 5) to obtain a dense samarium iron nitride block material. The application can realize layer-by-layer manufacturing of a permanent magnet block material, and meanwhile, can avoid the decline of magnetic performance caused by a thermal process.

The application relates to the field of coconut processing equipment, in particular to a coconut uniform cutting device, which comprises a base, the base is provided with a mounting frame, one side of the mounting frame is provided with a pushing assembly, the other side of the mounting frame is provided with a longitudinal cutter, a lifting assembly is arranged between the longitudinal cutter and the mounting frame, and a plurality of vertical cutters and transverse cutters are arranged on the side of the longitudinal cutter close to the pushing assembly. The vertical cutters and the transverse cutters are inserted to form a grid-shaped cutting structure, the pushing assembly can be used for multi-dimensional cutting of coconuts at one time, the operation times are reduced, and the cutting efficiency is greatly improved. Meanwhile, the cutters are accurately positioned through fixing pieces, the pushing block of the pushing assembly corresponds to the intersection area of the cutters, the deviation of the coconuts during cutting can be effectively avoided, the size and shape of the cut coconuts are consistent, and the problems of low efficiency and poor uniformity in manual cutting or cutting by simple equipment are solved.

The utility model discloses a mouse with an anti-abrasion function, which belongs to the technical field of mouse anti-abrasion and comprises a mouse outer shell and an anti-abrasion block horizontally and slidably mounted at the tail of the mouse outer shell through a connecting piece. The mouse outer shell is formed by covering a lower cover plate and an upper cover, and the end face of the tail of the upper cover and the horizontal plane where the lower cover plate is located form a containing notch. When the anti-abrasion block is in the storage state, the anti-abrasion block is installed in the storage notch through the connecting piece. When the anti-abrasion block is in the working state, the anti-abrasion block is pulled out of the containing notch through the connecting piece and located behind the tail of the upper cover. When the anti-abrasion block is in the storage state, the anti-abrasion block is installed in the storage notch through the connecting piece, and it is guaranteed that the anti-abrasion block is consistent with the shape of the tail of an existing mouse; when the anti-abrasion block is in the working state, the anti-abrasion block is pulled away from the containing notch and located behind the tail of the upper cover, the elbow is supported, friction between the elbow and a table top is avoided when the mouse is moved, user experience is improved, and convenience and practicability are achieved.

A medical image generation method based on cycle diffusion and target guided sampling, which generates other target modality medical images from existing source modality medical images by cycle diffusion. In the noise prediction network of the diffusion model of the cycle diffusion model, an additional attention mechanism is introduced to fuse the anatomical structure information in the source modality medical image and the current noise image; at the same time, the anatomical structure segmentation network introduces an anatomical structure shape loss. In training the diffusion model, a perceptual priority weighting P2W training strategy is adopted: by adjusting the loss function weight, the diffusion model is made to preferentially learn the global structure of the image at a high noise level and optimize the image details at a low noise level; at the same time, a target guided classifier for the sampling stage is trained. In the sampling stage: first, the latent code is obtained by reverse sampling from the source modality image; then, under the guidance of the classifier, the target modality probability gradient information is used to guide the sampling process, and the generation of the target modality image is completed.

The utility model relates to the field of dumpling wrapper punching equipment, and discloses dumpling wrapper punching equipment convenient for die replacement, the dumpling wrapper punching equipment comprises a dumpling wrapper punching machine, a support table is fixedly mounted below the dumpling wrapper punching machine, and the two side parts of the dumpling wrapper punching machine extend to the upper surface of the dumpling wrapper punching machine and are symmetrically and fixedly connected with guide support rods; an electric telescopic rod is arranged at the top of the dumpling wrapper punching machine, a movable support is installed at the output end of the lower bottom surface of the electric telescopic rod and located on the outer surface of the guide supporting rod, a limiting table is fixedly installed in the middle of the bottom end of the movable support, and a limiting clamping plate is installed below the limiting table; through cooperation of the limiting table, the limiting clamping plate, the limiting groove, the mold body and the limiting plate, when the mold is replaced, operation is easy, convenient and rapid, complex operation does not need to be conducted with the help of various tools, the mold replacement efficiency is greatly improved, compared with the prior art, the problem that mold replacement of dumpling wrapper punching equipment is inconvenient is effectively solved, and the practicability is high. And the production efficiency and the product quality are improved.

The utility model relates to the technical field of industrial personal computer cases, in particular to an industrial personal computer case which comprises a case body, a heat dissipation mechanism is fixedly arranged on the outer surface of the case body, and the heat dissipation mechanism comprises circular heat dissipation holes, a fillet plate and side face heat dissipation holes. According to the utility model, the industrial personal computer case is fixed on a certain object in a threaded connection mode, the position of the case body can be adjusted by the rear upper frame according to the use requirement and the extension lug, and when the rear upper frame reaches a specified position, the screw also penetrates through the threaded hole in a threaded rotation mode and is movably connected with the fillet plate to achieve the purpose of fixation; the design of circular heat dissipation holes is consistent with the shape of an air outlet of the fan; the electromagnetic compatibility protection requirement is considered; the side air outlet design is adopted; the air outlet area is increased; the visual effect is enhanced; the use requirements of customers on rear racking are met, and the position of the box body can be adjusted through the extending lugs.

The utility model discloses a 35kV handcart type fast circuit breaker, comprising a mechanism box body, an eddy current repulsion mechanism is arranged in the mechanism box body, the output end of the eddy current repulsion mechanism is arranged on a transmission assembly, and the eddy current repulsion mechanism is connected with the transmission assembly through a guide assembly; the main conductive loop assembly comprises an insulating pull rod; the eddy current repulsive force mechanism discharges the coil through the capacitor assembly, the eddy current disc forms eddy current to generate repulsive force, the transmission assembly pulls the insulation pull rod to move, and opening and closing actions are achieved. According to the utility model, the eddy current repulsion mechanism is adopted, so that the switching-on and switching-off time is short, the starting is fast, and small-range protection of line current protection can be realized; transmission is simple and reliable, and service life is long; the appearance and the interface size are consistent with those of a conventional spring mechanism circuit breaker, and interchangeability is high.

The utility model relates to a multi-channel extrusion feeding device which is characterized by comprising a storage part, a connecting pipe and a multi-pipe uniform extrusion structure, materials in the material storage part sequentially pass through the connecting pipe and the feeding pipe and then enter the extrusion part from the multiple feeding ports respectively, then the materials in the extrusion part enter the multiple discharging pipes at the same time through the rotatable material pushing blades, and therefore it can be guaranteed that the materials discharged by the multiple discharging pipes respectively are kept uniform and consistent, and the quality of the materials is improved. And the finally formed shape and size are kept consistent.

The utility model discloses an improved steel bar bending tool which comprises an operation table. The guide assembly is connected to one end of the upper portion of the operation table; the steel bar bending assembly is connected to the other end of the upper portion of the operation table. The transmission assembly is arranged on one side between the guide assembly and the steel bar bending assembly, one end of the transmission assembly is in transmission connection with the steel bar bending assembly, and the other end of the transmission assembly is connected to the upper portion of the operation table; and the operating handle is connected to the outer side of the other end of the transmission assembly. The steel bar bending machine is ingenious in design, safe and reliable, can accurately control the bending angle, ensures that steel bars meet design requirements, improves working efficiency, can provide stable and uniform power due to the arrangement of the transmission assembly, enables the bending process to be more stable, ensures that the bending angle and shape of each steel bar are consistent, improves consistency of bending quality, and reduces production cost. And meanwhile, the labor intensity is relieved, and fatigue and errors caused by manual bending are avoided.

The utility model relates to the technical field of commodity shelf assembly, in particular to a commodity shelf convenient to assemble. Comprising a plurality of storage tables, a plurality of supports and four steering wheels, the four supports are arranged at the bottoms of the storage tables, every two adjacent storage tables are connected through the four supports, connecting columns are fixedly arranged at one ends of the supports, clamping pieces are fixedly arranged at the other ends of the supports, and the storage tables are movably buckled to the clamping pieces of the four supports. The four corners of the bottom of each storage table are provided with clamping grooves matched with the clamping pieces in a buckled mode, the connecting columns penetrate through the storage table located on the lower portion and are rotationally connected with the support on the other layer in a threaded mode, and terminating pieces penetrate through the four corners of the storage table on the uppermost layer and are rotationally connected with the connecting columns on the uppermost layer in a threaded mode. The connecting columns at one ends of the four supports on the lowermost layer are in threaded rotation connection with the four steering wheels respectively. Compared with the prior art, the utility model has the advantages that the number of parts is small, the parts are convenient to take and use during assembly, small screws are not needed for fixation, and the assembly is convenient.

The invention relates to a method for preparing a high-purity carbon nanotube, in particular to a method for preparing a high-purity carbon nanotube through alloy catalytic methane cracking. The invention aims to solve the problems that the catalyst is easy to inactivate, the product carbon nanotube is low in purity and difficult in morphology control when the existing catalytic system is used for catalyzing the methane cracking reaction, and the application in the field with extremely high requirements on the consistency of the carbon nanotube is seriously restricted. A catalyst precursor solution is subjected to spinning treatment in combination with an electrostatic spinning technology, and nickel-based alloy precursor fibers with high specific surface area, high porosity and controllable fiber arrangement are formed; the preparation process not only improves the catalytic activity of the catalyst in the CMD reaction, but also effectively regulates and controls the nucleation and growth process of the carbon nanotubes, so that high-selectivity synthesis of the carbon nanotubes with high graphitization degree, high purity and consistent structure is realized, and a reliable method is provided for controllable preparation of the high-quality carbon nanotubes.

The utility model discloses an automatic folding forming device of a flexible packaging container, which comprises a frame body, a driving motor connected with the frame body, a piston frame connected with the driving motor, a piston rod inserted in the piston frame, an external negative pressure vacuum device connected with the piston rod, a piston head connected with the piston rod, and a suction hole formed in the piston head. An external negative pressure vacuum device is communicated with the piston head through a piston rod, so that the suction hole has an adsorption effect, and the frame body is connected with a mold which is connected with a forming cup body. The device has the beneficial effects that the production efficiency is greatly improved; stable product quality is guaranteed; the production cost is obviously reduced; operation is convenient, and adaptability is high.

The utility model relates to the technical field of open mouth ware, and disclose a kind of open mouth ware structure convenient to use, using integrated multipurpose type's working structure, open mouth top cone and open mouth cutter are integrated and installed in the upper portion of base, can be respectively used for the packaging opening work of the adhesive of aluminium sheet pipe and plastic hard pipe, give consideration to the opening demand of various adhesives end pipe, different end head is respectively used open mouth top cone and open mouth cutter of knife rest support type of cone seat shape, different end head can be realized high efficiency, fast opening, and the quality of opening is stable and opening shape and size are consistent, can effectively solve the problem that end head opening shape and size are not identical, open mouth top cone and open mouth cutter are respectively used bolt and magnetic attraction limit position type's convenient to dismantle and install structure, can be quickly carried out fragile component replacement and prolong service life, cooperate with the support limit of positioning cylinder seat and plastic tube knife rest, can effectively reduce the risk that open mouth ware occurs accidental injury, it is beneficial to the improvement of open hole ware service life and security.

The invention relates to the technical field of medical auxiliary devices, and discloses a digital guide plate for a depth-keeping bone finishing technology, which comprises a depth-keeping bone finishing guide plate, a depth-keeping guide column, an occlusion fixing plate and a connecting rod for connecting the depth-keeping bone finishing guide plate and the occlusion fixing plate, the occlusion fixing plate is accurately prepared through 3D printing according to the three-dimensional shape of teeth of a patient, a plurality of grooves are formed in the occlusion fixing plate, and the grooves are matched with the teeth of the patient in shape; at least four guide grooves are formed in the fixed-depth bone finishing guide plate, fixed-depth guide columns matched with the guide grooves are movably arranged in the guide grooves, and a specific bone finishing depth mark is arranged on each fixed-depth guide column; at least two titanium nail holes are formed in the fixed-depth bone trimming guide plate, and titanium nails are movably arranged in the titanium nail holes. The whole abnormal bone surface can be positioned and trimmed by only one pair of guide plates, the depth-keeping column is guided by the depth-keeping hole to determine the bone trimming depth, real-time navigation in an operation is not needed, the operation time and operation steps are greatly reduced, and operation wounds are reduced.