626results about How to "Guaranteed compactness" patented technology

The invention discloses a virtual scene construction method based on point cloud data, a medium and equipment. The method comprises the following steps: constructing an initial virtual scene based on original point cloud data; constructing a depth map corresponding to the point cloud data in the initial virtual scene, and determining a shielding relationship among the objects in the initial virtual scene based on the depth map; performing physics-based rendering on an object in the initial virtual scene, and processing the rendered initial virtual scene by adopting global illumination; and integrating the occlusion relationship into the rendered initial virtual scene to generate a new virtual scene. Through the above mode, the method can improve the trueness of building the virtual scene through the radar point cloud data.

The invention discloses a multi-modal emotion recognition method based on cross-modal interaction of a state space model, and belongs to the technical field of multi-modal emotion recognition, and the method comprises the steps: firstly, extracting low-level features of voice and text, and extracting S4D features through employing a structured state space sequence model of a diagonal version, the unique sequence modeling capability and the robust feature extraction capability are fully utilized, and the complex time correlation of sound and text data is effectively captured; secondly, in order to fuse the modal features of the sound and the text, a plurality of cross-modal fusion strategies are provided to dynamically learn the weight between the modals; besides, in order to better distinguish different types of sentiments, a triple loss is designed and is combined with a cross entropy loss, so that the accuracy of the model in sentiment classification is improved; finally, an ablation experiment is carried out, and the effectiveness of the method is verified. According to the invention, the performance and generalization ability of the multi-modal emotion recognition system are effectively improved.

The invention discloses an intelligent vibrating rod, and relates to the technical field of concrete pouring equipment. The device comprises a gasoline engine, a vibrating rod head is arranged on one side of the gasoline engine, and an adjustable rod body is arranged between the gasoline engine and the vibrating rod head; a direction adjusting part and an angle adjusting part are arranged in the adjustable rod body, and the vibrating rod head is fixed after being adjusted in a circumferential rotation mode around the adjustable rod body through the direction adjusting part. And the vibrating rod head is fixed after being overturned and adjusted at the end part of the adjustable rod body through the angle adjusting piece. According to the device, the adjustability of the angle of the vibrating rod head is realized through the matching of the worm, the worm gear and the like, the vibrating coverage can be ensured without frequently moving the vibrating rod or adjusting the construction position in a narrow space, the vibrating surface can be greatly increased through the matching of the angle adjusting piece, the vibrating blind area does not exist, and the working efficiency is improved. The uniformity and compactness of the concrete are ensured, and the requirements of users are met.

The invention discloses a polyamide composite membrane based on a nanobubble-assisted free interface polymerization strategy and a preparation method and application of the polyamide composite membrane. Nanobubble precursors of different types and concentrations are loaded in a water-phase solution by a chemical method, and the polyamide composite membrane is prepared by means of reaction between the precursors and water or self-decomposition of the precursors. Nanometer bubbles are pre-constructed in a water phase solution, and under a free interface polymerization process, by utilizing upward migration of the nanometer bubbles at a neutralization phase interface of the water phase solution, hierarchical regulation and control of a polyamide separation layer structure are realized from bottom to top; according to the polyamide composite membrane, the bottom opening characteristic, the internal nano-cavity structure and the surface morphological characteristic of the polyamide separation layer are effectively improved, the transmembrane transmission rate of water molecules is remarkably increased, the hydraulic resistance is reduced, and the water flux of the membrane is remarkably improved on the premise that the salt rejection rate of the polyamide composite membrane is not sacrificed.

The invention provides a pepper seedling transplanting device, and relates to the technical field of pepper seedling transplanting. The pepper seedling transplanting device comprises a seedling raising box, a liquid storage tank is arranged in the seedling raising box, a seedling raising cylinder is arranged in the liquid storage tank, a bearing part is elastically inserted into the bottom in the liquid storage tank, and an extrusion part is rotationally arranged on the bearing part; the bottom end of the seedling raising cylinder is slidably arranged on the bearing part in a sleeving mode, and the bottom end of the seedling raising cylinder is connected with the extrusion part in an inserted mode; a separating part is inserted into the seedling raising cylinder, the separating part abuts against the bearing part, the separating part comprises a plurality of partition plates which are evenly arranged in the circumferential direction, the partition plates are in wedge-shaped fit with the extrusion part, and the seedling raising cylinder drives the partition plates to rotate, so that the partition plates and the top end of the bearing part rotate; by means of wedge-shaped matching between the extrusion pieces and the partition plates, the multiple partition plates synchronously move inwards in the radial direction in the downward moving process of the seedling raising cylinder, and the compactness of the cultivation soil is guaranteed.

The invention discloses an internet-of-things method and system for collapsible loess foundation collapse monitoring and early warning, and relates to the technical field of foundation monitoring. The invention relates to an internet-of-things system for monitoring and early warning collapsible loess foundation collapse. The internet-of-things system comprises a loess foundation partition division module and a loess foundation monitoring and early warning module. According to the method, the minimum monitoring unit is constructed, the rainfall data, the earth surface data and the rainfall prediction evaluation model are combined, and the time-space depth fusion is performed on the rainfall data by using the CNN and the LSTM model, so that the accuracy of rainfall prediction is improved, and accurate monitoring and early warning of the collapsible loess foundation area are realized; the monitoring area can be divided into a plurality of early warning subareas through the depth clustering technology in combination with the rainfall condition and the earth surface data, the early warning accuracy and response speed are improved, disasters caused by collapsible loess foundation collapse are effectively prevented, and fine management of the loess foundation area is achieved.

The present invention discloses a controllable anti-overturning swivel ball joint, including a ball joint bracket, a lower ball joint, a limit pin and an upper ball joint. The lower ball joint is fixed on the ball joint bracket, the upper ball joint is coaxially and longitudinally stacked above the lower ball joint, the upper ball joint and the lower ball joint are spherically rotated and assembled, the limit pin is fixed at the center of the lower ball joint, the upper ball joint is provided with a limit hole for the limit pin to be inserted, the limit pin is a steel tube concrete structure, the upper ball joint is a circular convex spherical structure, and the lower ball joint is a circular concave spherical structure adapted to the upper ball joint. Compared with the prior art, the upper ball joint and the lower ball joint of the present invention are arranged in a hollow circular ring shape as a whole, and a narrower cross section can be achieved under the same bearing capacity, which is more conducive to ensuring the density of the concrete pouring at the bottom; the overall plane structure of the controllable anti-overturning swivel ball joint is annular, which is conducive to backfilling and sealing the center part after the rotation operation is completed, ensuring the safe use of the bridge in the later stage.

The invention provides an anti-cold stimulation nursing device used after tumor chemotherapy, and belongs to the field of nursing tools. Comprising a wrapping piece; a heat conduction pipe is arranged in the wrapping part, the two ends of the heat conduction pipe are movably connected with a heating device, the heating device comprises an outer shell, an air blowing structure and a heat adjusting structure are arranged in the outer shell, and a leakage-proof structure is connected between the heat conduction pipe and the outer shell; the air blowing structure comprises a center shaft rod rotationally connected to the axis of the outer shell, a variable frequency motor is fixedly connected to the interior of the outer shell, and the output end of the variable frequency motor is fixedly connected with a first bevel gear. The air conditioner can be used by people of different heights, heat can be rapidly generated, cyclic heating is formed, heat in all areas is more uniform, the heat can be automatically adjusted according to the air speed, and the sealing effect of the structure at the joint of the outer shell and the heat passing pipe is automatically adjusted according to the air speed.

The invention discloses a die-casting forming method of an aluminum alloy shell die casting, which relates to the technical field of forming processing of metal parts and comprises the following steps: selecting materials, melting and refining, carrying out die-casting forming, shaping and trimming, refining and machining, cleaning and decontaminating, and assembling. Through fine polishing treatment and preheating measures, the problem of film sticking at a sprue is remarkably relieved, effective feeding, slow injection and rapid injection are achieved, the speed of an injection punch of rapid injection is larger than 6 m / s so that the density and quality of a final casting can be guaranteed, a cavity is divided into different temperature zones in the injection direction, staged cooling is conducted, and the casting quality is improved. The mold is opened 19-21 seconds after the cavity is filled with the raw materials, it is ensured that the casting has enough strength, deformation or damage is avoided, the high-performance requirement of the aluminum alloy shell of the automobile air conditioner compressor can be met, the production efficiency and the product quality can be improved, and meanwhile the influence on the environment is reduced.

The invention discloses a preparation method of an aluminum pigment for water-based ink. The preparation method comprises the following steps: forming a phosphate coating layer on the surface of the aluminum pigment through phosphate; forming a silicon coating layer on the surface of the aluminum pigment through a silane coupling agent and tetraethoxysilane; a phosphate-modified water-based resin coating layer is formed on the surface of the aluminum pigment through phosphate-modified water-based resin. The preparation method of the aluminum pigment for the water-based ink, provided by the invention, has the following beneficial effects that through surface passivation of phosphate ester, the compactness of silicon coating is ensured, and the hue loss of the aluminum pigment is reduced; a silane coupling agent with amino groups is introduced, so that the phosphate coating layer is coated with a silicon coating layer; the phosphate modified water-based resin is introduced, so that the produced aluminum pigment can be better dispersed in water-based ink.

The utility model discloses a sand box for casting, which relates to the technical field of sand boxes and comprises a lower box body, first handles are respectively arranged at the front end and the rear end of the lower box body, limiting blocks are fixedly connected at four corners of the upper end of the lower box body, an upper box body is arranged at the upper end of the lower box body, and second handles are respectively arranged at the front end and the rear end of the upper box body. Under the combined action of the lower box body, the limiting block, the upper box body, the connecting plate, the adjusting bolt and the movable plate, the sand box can be conveniently combined, fixed and disassembled during use, under the combined action of the placing frame, the telescopic push rod, the clamping plate, the lifting device and the push plate, the sand box can be conveniently clamped and fixed, and the sand box is prevented from being damaged during casting. When the sand box moves or inclines, under the combined action of a base, a vibrator, a telescopic rod, a second spring and a buffer seat, when the sand box is used, casting sand in the sand box can fully flow when being filled, and the compactness of the sand box is ensured.

The invention relates to the technical field of asphalt concrete paving, in particular to a large-thickness paving device for large-particle-size permeable asphalt concrete.The large-thickness paving device comprises a box body, the bottom of the box body is obliquely arranged, a shell is fixedly installed at the rear end of the box body, and a rectangular hole communicating with the interior of the shell is formed in the side wall of the box body; a rotating shaft is horizontally and rotatably installed in the shell, auger blades are symmetrically and fixedly connected to the rotating shaft in a sleeving mode, a plurality of discharging openings communicated with the interior of the shell are formed in the lower surface of the shell, a driving shaft is rotatably installed at the upper end of the shell, and a driving motor is fixedly installed at the upper end of the shell. An output shaft of the driving motor is fixedly connected with the driving shaft, and a transmission assembly used for driving the rotating shaft to rotate is arranged on the shell. Due to the arrangement of the multiple discharging openings, asphalt concrete can be uniformly paved on a pavement, after the pavement is ironed and compacted, the compactness and flatness of the pavement are guaranteed, and the overall quality of the pavement is effectively improved.

The present invention discloses a sealing device of a rotary kiln and a rotary kiln, the sealing device comprises a moving ring and a stationary ring arranged between a cylinder and a kiln cover, the two are in contact with each other and rotate relatively to form a spherical-conical end face sealing pair, the moving ring is fixed on the cylinder on the side away from the stationary ring, the stationary ring is elastically and sealedly connected to the kiln cover through a compensator, and the stationary ring is connected to an axial force component on the circular ring end face close to the kiln cover. The rotary kiln comprises the above-mentioned sealing device. The sealing device of the present invention, under the joint action of the moving ring, the stationary ring, the compensator, the rotating pair, the sliding pair and the axial force component, can realize the continuous and effective sealing of the cylinder and the kiln cover of the rotary kiln, has the advantages of simple structure, convenient use, good adaptability, high reliability, good sealing effect, long service life, etc., can be widely used in equipment such as rotary kilns, and has important promoting significance for effectively improving the sealing effect of rotary kilns and promoting the widespread use of rotary kilns.

The utility model provides a battery liquid cooling module which comprises a battery module, a battery module fixing frame and a liquid cooling assembly, liquid cooling plates are respectively arranged on two opposite sides of the battery module fixing frame, and the liquid cooling plates are communicated through liquid cooling pipes to form a loop, so that circulating liquid takes away heat generated by the battery module; and the safety of the battery module is improved. The elastic insulating heat conduction pad is arranged between the liquid cooling plate and the battery module fixing frame, and the liquid cooling pipe is arranged to be the corrugated pipe with the expansion joint, so that the flowing stroke of liquid can be increased, the heat dissipation effect is improved, the corrugated pipe can absorb deformation and displacement caused by thermal expansion and cold contraction or mechanical vibration in a pipeline system, and the heat dissipation efficiency is improved. The compensation effect is achieved; by arranging the telescopic joints and the corrugated pipes, the length can be adjusted, the installation size error of the liquid cooling plates on the two sides and the distance change between the liquid cooling plates can be made up, the anti-loosening and cushioning effects are achieved, and liquid leakage caused by loosening of the clamping parts in the using process is effectively avoided.

The invention discloses an ecological slope protection supporting structure for hydraulic engineering, and relates to the technical field of ecological slope protection, the ecological slope protection supporting structure comprises a fixing block, rotating plates are rotatably connected to the two sides of the surface of the fixing block, inserting rods slidably mounted on the fixing block are arranged below the rotating plates, and the inserting rods are used for being inserted into soil to fix the position of the fixing block; a control assembly is arranged in the fixing block. According to the ecological slope protection supporting structure for the water conservancy project, when rainwater slides down from a slope and generates impact force on the rotating plate, the mechanism can automatically adapt to the external force and convert the external force into rotating kinetic energy of the rotating plate, manual intervention is not needed in the design, rainwater impact can be automatically responded, and the intelligent degree and the automation degree of a system are improved; the rotating plate rotates through a series of mechanical transmission to finally drive the supporting plate and the first pressing plate and the second pressing plate on the supporting plate to conduct compaction treatment on soil, the compaction mechanism is efficient, the compactness of the soil around the inserting rod can be guaranteed, and soil loss is effectively prevented.

The invention provides an actuator, a joint module, a mechanical arm, a biped robot, a quadruped robot, a quadruped robot, a humanoid robot and a robot. The actuator comprises a shell, a motor assembly and a speed reducer assembly, the shell comprises an outer shell part, a first extension part and an inner cylinder part, and a first containing cavity with an opening is defined; the motor assembly is composed of a rotor, a stator, a rotor adapter and a rotary supporting assembly, the rotor adapter is provided with a rotor connecting part, a second extending part and a first connecting shaft part and is connected with the rotor, the rotor and the stator are arranged in the first containing cavity, and the rotary supporting assembly is arranged between the first connecting shaft part and the inner cylinder part; an input end transmission shaft of the speed reducer assembly is connected with the first connecting shaft part and rotates along with the rotor adapter, the second extension part is close to the speed reducer assembly, and the first extension part is far away from the speed reducer assembly relative to the second extension part. According to the invention, the transmission precision of the actuator and the stability of power output are ensured while the small size and compactness of the actuator are realized.

The utility model relates to the field of lamps, and provides a connecting structure for a track lamp and the track lamp. The connecting structure for the track lamp comprises a first connecting body, a terminal assembly is detachably installed on the first connecting body, and a first containing part is formed on the side, away from the terminal assembly, of the first connecting body; a second containing part is formed on the side, facing the first connecting body, of the second connecting body, and at least one of the first connecting body and the second connecting body is used for being connected with a rail; and the rotating shaft assembly is arranged in the first accommodating part and the second accommodating part under the condition that the first connecting body and the second connecting body are buckled, and the first connecting body and the second connecting body are suitable for relatively rotating through the rotating shaft assembly. According to the connecting structure for the track lamp, the stability in the using process is guaranteed, the risk that the lamp shakes or falls off is reduced, and the compactness of a track lamp system is kept; and the position and the angle of the track lamp or other equipment on the track can be flexibly adjusted, and the direction and the position of the lamp can be conveniently changed.

The invention provides a tailing sand aggregate and application thereof. The tailing sand aggregate comprises tailing sand of 40-90 meshes, tailing sand of 90-400 meshes and tailing sand of 400-1250 meshes, wherein the mass ratio of the tailing sand to the tailing sand of 40-90 meshes to the tailing sand of 90-400 meshes to the tailing sand of 400-1250 meshes is 1: 0.6-3: 0.4-2. When the tailing sand aggregate provided by the invention is used for preparing concrete, close packing of the concrete can be realized, so that the concrete has higher fracture resistance and compressive strength. The invention also provides the ultra-high performance concrete which comprises 30-85 wt% of the tailing sand aggregate. According to the ultrahigh concrete provided by the invention, the adding amount of the tailing sand aggregate is high, the utilization rate of the tailing sand solid waste is high, and meanwhile, close packing of the concrete can be realized by adopting the tailing sand aggregate, so that the concrete has higher fracture resistance and compressive strength. The ultra-high performance concrete provided by the invention can be applied to the fields of building materials, pavement materials, bridge engineering and the like.

The invention relates to a sealing structure and a container, and belongs to the technical field of equipment sealing. One of the sealing structures includes a ring assembly including an elastic energy storage ring; the floating ring is provided with a container barrel contact wall surface and a container end cover contact wall surface, a first mounting position is arranged on the container barrel contact wall surface, and a second mounting position is arranged on the container end cover contact wall surface; and the first mounting position and the second mounting position are both provided with the ring assemblies. The ultrahigh-temperature and high-pressure sealing condition can be met during use, large matching clearances can be adopted between the floating ring and the container end cover and between the floating ring and the container barrel by utilizing the characteristics of the floating ring and the elastic energy storage ring during assembly, and installation is convenient.

The invention provides a mechanical actuation trigger type pulse driving source device. The mechanical actuation trigger type pulse driving source device comprises a rectifying and filtering module, a high-frequency boosting module, a voltage doubling rectifying module, a pulse modulation module, a trigger module and a control loop electrically connected with the high-frequency boosting module, the voltage doubling rectifying module and the trigger module. The rectifying and filtering module is used for performing alternating current-direct current conversion; the high-frequency boosting module is used for receiving the direct-current signal, performing inversion boosting and then outputting a high-voltage alternating-current signal; the voltage-multiplying rectification module is used for receiving the high-voltage alternating current signal and outputting a high-voltage direct current signal through voltage-multiplying rectification; the pulse modulation module is used for charging and energy storage; the trigger module is used for enabling the pulse modulation module to establish a discharge loop to discharge a load when the high-voltage direct-current signal reaches a preset value; and the control loop is used for controlling the high-frequency boosting module and the triggering module and monitoring the output of the voltage doubling rectifying module. The pulse driving source device has the advantages of few switch stages, small stray parameters, wide trigger dynamic range and light weight.

The invention provides a diamond and negative expansion particle reinforced aluminum matrix composite and a preparation method, and belongs to the technical field of composites. The aluminum-based composite material is composed of a diamond phase and a negative thermal expansion phase which are dispersed in an aluminum matrix. The average particle size of the diamond phase is 10-1000 [mu] m, and the ratio of the average particle size of the diamond phase to the average particle size of the negative thermal expansion particles is 10-20; the particle size of the negative thermal expansion particles adjacent to the diamond phase is smaller than that of the negative thermal expansion particles away from the diamond phase. The diamond and negative expansion particle reinforced aluminum-based composite material with excellent thermophysical performance is obtained by regulating and controlling the volume fraction of the diamond and the negative expansion particles, the thermal expansion coefficient matched with a semiconductor material is prepared through a collaborative optimization strategy, and the diamond and negative expansion particle reinforced aluminum-based composite material is applied to the field of electronic packaging heat dissipation materials.

The invention provides a preparation method of a chlorine salt conversion film with high corrosion resistance, which comprises the following steps: dissolving manganese chloride and calcium chloride in water, then adding ammonium dihydrogen phosphate, sodium nitrate and EDTA (Ethylene Diamine Tetraacetic Acid), and carrying out conversion treatment at 50-60 DEG C for 10-15 minutes to obtain a conversion film solution; placing the conversion film solution in a water bath kettle with the temperature of 50-60 DEG C for heating and heat preservation; the magnesium alloy is put into the conversion film solution to form a film for 10-15 min at the film forming temperature of 50-60 DEG C, and a conversion film is formed on the surface of the magnesium alloy; and taking out the magnesium alloy, washing and drying the conversion film, and characterizing. According to the preparation method of the chlorine salt high-corrosion-resistance conversion film, the preparation cost is low, and the prepared film layer is thick and uniform.

The invention relates to the technical field of motor winding, in particular to a coil winding machine for motor assembling, which comprises a control assembly, a winding operation machine table and a winding modulation assembly, and is characterized in that the control assembly comprises a stepping motor seat mounted on the upper surface of the winding operation machine table and a motor stator arranged on the inner side of the stepping motor seat; a machining back plate is fixedly connected to one side of the winding operation machine table, a roller seat is arranged on one side wall of the machining back plate, a coil roller is inserted into the inner side of the roller seat, an adjusting frame is fixedly connected to one end wall of the machining back plate, and two guide brush rollers are rotatably installed on the lower portion of the adjusting frame in an inserted mode. And an electric push rod is fixedly mounted on one end wall of the winding operation machine table in a penetrating manner, so that when a motor is maintained and wound, the winding compactness of a coil is improved, the re-failure rate caused by loose winding is reduced, automatic winding and mounting can be performed at the same time, and the working quality and efficiency of equipment are improved.

The invention belongs to the technical field of soft soil foundation engineering monitoring, and provides a soft soil foundation engineering pore water pressure and layered settlement comprehensive monitoring method which comprises the following steps: S1, selecting a plurality of measuring holes in a monitoring area, and dividing each measuring hole into a plurality of different depth intervals; s2, a measuring rod assembly is installed in each depth interval, and a pressure meter and a settlement anchor point assembly are installed on each measuring rod assembly; s3, a plurality of measuring rod assemblies are connected in sequence and put down into the measuring hole, and backfilling of the measuring hole is carried out; and S4, recording the pore water pressure value and the layered settling volume of each depth interval, and sending out an early warning signal when the real-time monitoring value exceeds a threshold value. According to the method, the pore water pressure and the layered settlement are associated together, feedback adjustment can be carried out on designed stacking data according to the association relationship, and the settlement trend can be accurately predicted to assist in determining the pre-pressing unloading time and the structure construction time.

The invention belongs to the technical field of oil seal leakproofness test, and particularly relates to a high-low pressure gas spring oil seal leakproofness test box for an automobile suspension system, the high-low pressure gas spring oil seal leakproofness test box comprises a seal test device and a pressure balance system, the seal test device comprises a box body, a partition plate, an upper cover plate, a lower sleeve and a reinforcing mechanism; a box plate is in shaft connection with the upper portion of the box body, a display screen and a plurality of buttons are fixed to one side of the box body, the partition plate is fixedly installed on the inner wall of the box body, the lower sleeve is fixedly installed in the middle of the partition plate, the inner wall of the partition plate is slidably connected with an air pressure plate, an air pressure rod is fixed to the lower portion of the air pressure plate, and a hole is formed in the middle of the partition plate. According to the device, the problems that the test quality is influenced by a gap generated between an oil seal and a simulated gas spring due to the inaccurate simulation environment of the gas spring oil seal during the current oil seal tightness test, and the accuracy of a test result is greatly influenced by looseness caused by the fact that the simulated gas spring cannot be reinforced in the process are solved.

The utility model relates to the technical field of gas safety valves, and discloses a simple safety valve which comprises a valve body, a valve cover, a valve element, a rotating shaft, an elastic reset piece, an electromagnetic valve assembly, an ejector rod and a gas outlet pipe assembly. The valve body is provided with an air inlet, a valve element cavity and a ventilation cavity. The distance between the central axis of the air inlet and the end face of the valve cover is L; the distance L is 23 to 33 mm; the air outlet pipe assembly comprises a first air outlet pipe section; the distance between the central axis of the air inlet and the central axis of the first air outlet pipe section is D, and the distance D ranges from 10 mm to 18 mm. The simple safety valve has the advantages of being compact in structure and small in size design, the size range of key components is accurately controlled, the design layout is optimized, the compactness of the structure is guaranteed, and the situation that the structure is unstable and the size is too large due to the fact that the distance is too long is avoided. Meanwhile, factors such as manufacturing cost and installation convenience are fully considered in determination of the distance ranges, so that the safety valve has better applicability in practical application.

The invention provides a slurry pump front protective plate and a preparation method thereof, and belongs to the technical field of casting of rock breaking slurry pump front protective plates, and the preparation method comprises the following steps: step 1) preparing a prefabricated body; the prefabricated body is a ceramic prefabricated body, and the flowing speed of molten metal can be increased; (2) the prefabricated body is placed in a slurry pump front protection plate mold, then molten metal is poured into the slurry pump front protection plate mold, the slurry pump front protection plate mold is filled with the molten metal, meanwhile, the prefabricated body is wrapped, the molten metal is infiltrated into a set structure of the prefabricated body, and a front protection plate rough blank is obtained; wherein the molten metal is molten metal of a high-hardness wear-resistant alloy; and (3) carrying out heat treatment and processing on the rough blank of the front guard plate to obtain the front guard plate of the slurry pump. The ceramic preform of the spiral structure is high in hardness and strength, cracks cannot penetrate through the ceramic, meanwhile, metallurgical bonding exists between the high-hardness wear-resistant alloy matrix and the ceramic during pouring, the bonding force is large, crack propagation of high-hardness alloy cracking can be resisted, and the fracture toughness of the front protection plate is improved.

The invention discloses an execution mechanism for controlling a swash plate to drive a rotor wing to change the pitch and a flight platform control strategy. A servo execution unit assembly is arranged in the middle of a main force bearing assembly, and an upper swash plate assembly and a lower swash plate assembly are arranged on the main force bearing assembly located at the upper end and the lower end of the servo execution unit assembly; an upper rotor wing assembly and a lower rotor wing assembly are respectively arranged on the main force bearing assembly positioned at the upper end of the upper swash plate assembly and the lower end of the lower swash plate assembly; the phase lag angle is determined according to the optimal flapping frequency ratio of the rotor, the rocker arm connecting position connected with the variable-pitch pull rod on the bearing seat is designed in a targeted mode, the variable-pitch pull rod connecting points located on the swash plate assembly are located at the same vertical position, the optimal phase lag angle is achieved, meanwhile, the compactness and reliability of pull rod connection are guaranteed, and the service life of the rotor is prolonged. And the rotating tangential direction of the inclined disc assembly is basically perpendicular to the mounting plane of the spherical hinge base, so that the variable-pitch pull rod spherical hinge is further prevented from falling off.

The utility model provides a circular knife die-cutting machine with a buffering function, and relates to the technical field of circular knife die-cutting machines, the circular knife die-cutting machine comprises a feeding platform, a material belt buffering device, an adjustable deviation rectifying corona device, a die-cutting device and a conveying device which are arranged in sequence, the material belt buffering device comprises a fixed roller set and a sliding roller set, the fixed roller set comprises a plurality of fixed guide rollers, and the sliding roller set comprises a plurality of sliding guide rollers. The sliding roller set comprises a lifting seat, a lifting driving mechanism and a plurality of sliding guide rollers, a material belt bypasses each fixed guide roller and each sliding guide roller at intervals, the adjusting type deviation rectifying corona device comprises a deviation rectifying assembly and a corona assembly, the deviation rectifying assembly is connected with a sliding adjusting mechanism, the corona assembly is connected with a drawing adjusting mechanism, and the drawing adjusting mechanism is connected with the lifting seat. According to the circular knife die-cutting machine, non-stop material changing of the circular knife die-cutting machine is achieved through the arrangement of the material belt temporary storage device, meanwhile, the deviation rectifying effect on the material belt is improved, and the yield of products is guaranteed.