10results about How to "Avoid fatigue cracking" patented technology

The utility model belongs to the technical field of continuous reactors, and particularly relates to a continuous reactor for producing methacrylate, which comprises an instrument body and a motor, a rotating shaft is arranged at the output end of the motor, a rotating frame is fixedly mounted at the bottom of the rotating shaft, a first gear is fixedly mounted on the outer side of the rotating shaft, and a second gear is arranged on the rotating frame. A supporting column is arranged at the bottom of the second gear, and a stirrer is fixedly installed at the bottom of the supporting column. The scraper blade stirrer is installed to clean the inner wall, the motor is started and drives the rotating shaft to rotate, when the rotating shaft rotates, the rotating shaft then drives the rotating frame to rotate, the second gear on the rotating frame starts to rotate along with rotation of the rotating frame and under the interaction of the first gear, and the inner wall is cleaned through the scraper blade stirrer. The second gear rotates to drive the stirrer to rotate, then stirring is conducted in the instrument body, the stirrer is installed, reaction of reactants can be accelerated, the reaction rate can be increased, and even mixing of raw materials can be promoted.

The utility model discloses a flexible disc of integrated starting gear ring structure relates to flexible disc technical field. The flexible disc of integrated starting gear ring structure, including flexible disc disc body, flexible disc outer end and starting tooth, is set up flexible disc waist hole on flexible disc disc body. The flexible disc of integrated starting gear ring structure, through the machining allowance of flexible disc outer end and remains starting tooth's processing forming, makes starting tooth and flexible disc outer end integrated moulding, cancels the welding of flexible disc outer end and starting gear ring in the prior art and becomes the design, avoids the size of welding scar and cannot standardization, and there is not one, reaches the assembly gear ring of reducing, prevents the occurrence of the incomplete welding, cancels the welding process flow, prevents the failure of welding scar crack, and reduces the cost of sub -parts, and the structure strength of flexible disc disc body is strengthened when the plate enhances the transmission torque, and the flexible disc waist hole symmetric distribution lightens disc body quality, and enough structural strength is reserved simultaneously.

This utility model relates to the field of hydraulic cylinder technology, specifically to a telescopic cylinder for a roadheader, comprising a cylinder body with a cavity inside. A piston rod is disposed within the cavity, with its end extending out of the cylinder body. A spacer block with several through holes is located at the bottom of the cavity. A piston is disposed at the bottom of the piston rod and is slidably connected to the inner wall of the cylinder body. A piston seal is also provided on the outer wall of the piston. A limiting sleeve is provided at the top of the piston and is fitted onto the piston rod. A guide sleeve is provided at the end of the cylinder body, through which the piston rod passes. This utility model effectively prevents deformation of the telescopic cylinder and improves the stability and reliability of cylinder operation.

The invention discloses an anti-scouring device and a mounting method. The anti-scouring device comprises a pile body, a sliding block, a plurality of bottom rods, a blocking part and a plurality of connecting rods. The pile body extends in the first direction, the pile body is sleeved with the sliding block, and the sliding block is slidably connected with the pile body. The multiple bottom rods are rotationally connected with the pile body and distributed in the circumferential direction of the first direction at intervals, the blocking parts are connected with the bottom rods, the connecting rod is provided with a first end and a second end which are oppositely arranged in the length direction of the connecting rod, the first end is rotationally connected with the side, away from the pile body, of the sliding block, and the second end is rotationally connected with the bottom rods. The anti-scour device is configured to have a gathering state and an unfolding state, in the gathering state, the blocking part is close to the pile body, in the unfolding state, the blocking part is away from the pile body, and the sliding block moves in the first direction, so that the anti-scour device is switched between the gathering state and the unfolding state. The self-state can be flexibly adjusted, development of scouring of the seabed around the pile is restrained, and the pile is low in cost, long in life cycle and high in adaptability.

The utility model relates to the technical field of joint connection discloses a kind of upper joint of connecting mechanism, including first joint body, first joint body includes pressure bottom plate, transition sleeve and two wing plates, two wing plates are symmetrically arranged in pressure bottom plate both sides, wing plate includes rectangular part and trapezoidal part, rectangular part is connected with pressure bottom plate, rounding treatment is carried out between rectangular part and pressure bottom plate, and the rounding radius of rectangular part and the inner wall of pressure bottom plate is greater than the rounding radius of rectangular part and pressure bottom plate outer wall, transition sleeve is arranged in the middle of one end of pressure bottom plate away from wing plate, wing plate, pressure bottom plate and transition sleeve outer wall are symmetrically provided with reinforcing rib;By setting wing plate and pressure bottom plate form stable bearing frame of U, and cooperate with the middle support structure of transition sleeve, the lift, thrust, lateral force and torsional load generated by flight body can be simultaneously and efficiently transferred, to avoid single direction stress concentration.

This invention relates to the field of coating technology, and provides a high weather-resistant composite coating for photovoltaic profiles and its preparation method, solving the problems of poor weather resistance of existing photovoltaic profile coatings and their inability to simultaneously achieve anti-corrosion, superhydrophobic self-cleaning, heat insulation, and antistatic properties. The coating comprises, sequentially from the aluminum alloy substrate outwards, a primer layer and a topcoat layer. The primer layer comprises the following raw materials in parts by weight: 60-80 parts epoxy resin, 0.3-1.0 parts silane-modified graphene oxide, 8-15 parts curing agent, and 5-15 parts mixed solvent. The topcoat layer comprises the following raw materials in parts by weight: 70-90 parts modified hydroxyl fluorocarbon resin, 5-15 parts functional filler, 1-5 parts additives, and 10-20 parts organic solvent. The modified hydroxyl fluorocarbon resin has a hydroxyl-containing fluorocarbon resin main chain, and its side chains are covalently grafted with perfluoropolyether groups.

The utility model relates to a kind of high toughness base for machine tool, including base body, the hollow setting is formed cavity in the base body, multiple first support plate and multiple second support plate are crossly set in the cavity, rectangular slot is set in the first support plate and second support, and the four feet of the rectangular slot are rounded corner settings.A kind of high toughness base for machine tool of the utility model, by setting multiple first support plate and multiple second support plate, the strength of base is guaranteed by supporting base, and rectangular slot is set to reduce the weight of base, and inside angle uses rounded corner transition, force transmission becomes smooth, stress peak is eliminated, fatigue crack and sudden fracture of part under alternating load can be effectively prevented, the reliability and life of product are greatly improved, the root of stress concentration of sharp corner is solved, and the problem that effective fatigue strength and impact toughness of structure can be greatly reduced.

The utility model relates to embankment pipe installation technical field discloses a kind of embankment pipe outlet structures, it includes embankment pipeline, outlet elbow pipe, outlet abutment and anti-scouring component;Embankment pipeline is set to the inside of embankment retaining wall, and the axis of embankment pipeline is along horizontal direction and penetrates embankment retaining wall;One end of outlet elbow pipe is connected with embankment pipeline, the other end of outlet elbow pipe is curved to the downstream direction of river channel for discharging accumulated water to river channel, and gap is provided between outlet elbow pipe and embankment retaining wall;Outlet abutment is cast and fixed to the outside of the bending position of outlet elbow pipe, and the bending part of outlet elbow pipe is circular arc shape, and outlet abutment is used to suppress outlet elbow pipe vibration;Anti-scouring component is set to the outside of outlet elbow pipe terminal, and anti-scouring component is used to dissipate energy and prevent scouring.The utility model is designed by outlet elbow pipe and outlet abutment, effectively reduce the impact of outlet elbow pipe effluent on river channel original water flow system, ensure the stability of river channel original water flow system.

The primary agricultural product drying processing equipment comprises a drying box and an air heater, the air heater is installed on the end face of the drying box, an air outlet is communicated with the interior of the drying box, one side of the drying box is open, and a stress buffering mechanism is installed on the outer wall of a connecting rod. By arranging the second spring and the balls on the connecting block, the balls are in rolling contact with the arc-shaped grooves of the fixing frame, traditional rigid collision is converted into rolling friction, friction force and impact force in the contact process are greatly reduced, stress is prevented from being concentrated on local positions, and meanwhile when equipment is vibrated or impacted, the equipment is prevented from being damaged. The second spring can play a buffering role in time, absorb and disperse impact force and prevent the impact force from being directly transmitted to the fixing plate and the fixing frame, so that fatigue cracks caused by the fact that parts are in a stress concentration state for a long time are effectively prevented, the service life of key parts of equipment is greatly prolonged, and the maintenance cost and replacement frequency of the equipment are reduced.

The invention relates to the technical field of belt conveying equipment, in particular to a belt tearing detection and early warning method based on stripe marks, which comprises the following steps of: performing a test experiment on a stripe marked belt; adjusting the roller spacing of the conveyor belt based on the belt area ratio of the stripe-marked belt, calibrating the preset width of the oblique stripe-marked area according to the heat dissipation performance ratio, and correcting the gap uniformity of the oblique stripe-marked area according to the thermal expansion amount, an actual oblique stripe marking belt is arranged according to the adjusted roller distance, the calibrated preset width and the corrected gap uniformity, and whether the belt has the risk of tearing or not is judged according to the stripe width variable coefficient of the oblique stripe marking area. According to the method, the optimal roller spacing, the stripe width and the stripe gap uniformity of the belt are obtained by carrying out multi-working-condition simulation test on the stripe marked belt, and the problems that in the prior art, the deformation precursor of the belt cannot be sensed through laser projection, and tearing early warning is difficult to achieve are solved.