127results about How to "Reduce shock load" patented technology

The utility model relates to the technical field of spherical tank surface weld joint detection, in particular to a magnetic attraction type spherical tank weld joint detection robot which comprises a crawler crawling device, a weld joint detection device and a surface polishing device, and the crawler crawling device is used for providing walking power and adsorbing a climbing wall; the welding seam detection device is composed of a detection part and an imaging part, and the imaging part is composed of laser imaging equipment and infrared imaging equipment and used for scanning the interior and exterior of the spherical tank in the detection process and determining coordinate distribution of a welding seam; the detection part consists of a mechanical arm and flaw detection equipment and is used for detecting a welding seam; the surface grinding device is composed of a grinding wheel grinding machine and a sliding support. According to the spherical tank robot, the obstacle crossing capacity for the surface of the spherical tank is improved through the magnet, foreign matter on the welding seam and the surface of the spherical tank is removed through the grinding wheel polisher on the premise that the surface of the spherical tank is not damaged, the welding seam detection precision is improved, and nondestructive detection on the welding seam on the surface of the spherical tank is achieved through the welding seam detection device.

The invention discloses a vertical inclined flood control irrigation barrage and a construction method thereof. The barrage comprises a river channel base, dam walls are fixed to the two sides of the river channel base, a water passing river channel is formed between the river channel base and the dam walls on the two sides, and a plurality of positioning hooks are arranged on the river channel base; a plurality of anchoring parts are fixed on the anchoring table; the movable water baffle is connected to the water passing river channel in an overturning mode, a water inlet is formed in the upstream, corresponding to the movable water baffle, of the dam wall, a diversion canal connected with a farmland is arranged on the outer side of the dam wall, and water flow in the water passing river channel is guided into the diversion canal through the water inlet. The multiple water baffle overturning stay wires are fixed to the downstream face of the movable water baffle at intervals in the vertical direction, and the water baffle overturning stay wires penetrate through the threading pipes on the dam wall and then are connected with the anchoring parts at the corresponding ends. When the river water flow is small, the movable water baffle is lifted, and when flood comes, the movable water baffle needs to be released in time to be flush with the river bottom platform, so that the flood passes through smoothly. And after the flood ebbs, the water baffle is lifted to continuously irrigate the field for citizens.

The bidirectional flexible quasi-zero stiffness mechanism comprises a positive stiffness module, a first negative stiffness module and a second negative stiffness module, the positive stiffness module is of a rectangular frame structure, and the two negative stiffness modules are arranged on the inner side of the positive stiffness module in a mirror symmetry mode with the center of a rectangular frame as the symmetry point; the positive stiffness module and the two negative stiffness modules are connected in parallel, bidirectional quasi-zero stiffness is achieved, and the two negative stiffness modules show the completely symmetrical negative stiffness characteristic in two directions so as to increase the movement stroke. The instrument is installed on the bidirectional compliant quasi-zero stiffness mechanism, and when the instrument is impacted, damage of impact to the instrument and the servo platform is reduced through deformation of the bidirectional compliant quasi-zero stiffness mechanism. The quasi-zero stiffness mechanism has the characteristics of good impact isolation performance, good guiding and resetting performance, large movement stroke and the like, and solves the problems that an existing quasi-zero stiffness mechanism is difficult to realize movement in two directions, the movement stroke of the mechanism is limited, and accurate design is difficult to realize.

The invention provides a dynamic loading friction braking energy dissipation ship lock anti-collision device and method. The device comprises a lifting mechanism, a braking mechanism, an arresting mechanism and a steering mechanism. The lifting mechanism comprises a motor, a transmission mechanism, a winding drum and a steel wire rope wound on the winding drum, and the blocking mechanism is moved to a preset height through the steel wire rope for blocking; the blocking mechanism comprises a lower end steel wire rope and an upper end steel wire rope which are arranged on the steering mechanism in parallel in the vertical direction. The steering mechanism is used for guiding the steel wire rope of the lifting mechanism in the vertical direction into the lower end steel wire rope and the upper end steel wire rope of the parallel blocking mechanism; the brake mechanism comprises a brake disc arranged on the winding drum and brake disc brakes installed on the two sides of the brake disc. The technical problems that in the prior art, an anti-collision device is complex in structure, redundant in arrangement, insufficient in blocking performance and the like can be solved.

The invention provides a small-offset collision sideslip structure design method, an automobile body front structure and an automobile. The small-offset collision sideslip structure design method comprises the following steps that a first interval structure and a second interval structure of the automobile body front structure are determined; obtaining a first structure parameter of the first interval structure and a second structure parameter of the second interval structure; performing a simulation test according to the first structure parameter of the first interval structure and the second structure parameter of the second interval structure, and determining a first sideslip force corresponding to the first interval structure and a second sideslip force corresponding to the second interval structure; if the first sideslip force and the second sideslip force do not meet the small offset obstacle avoidance condition, updating a first structure parameter of the first interval structure and a second structure parameter of the second interval structure; and if the first sideslip force and the second sideslip force meet the small offset obstacle avoidance condition, determining the vehicle body front structure according to the first structure parameter of the first interval structure and the second structure parameter of the second interval structure.

The invention relates to the technical field of high-performance protective composite materials, in particular to a novel hybrid fiber composite material and a preparation method and application thereof.The novel hybrid fiber composite material comprises an energy buffer layer, a shear protective layer, a tensile reinforcing layer and a deformation energy absorption layer which are sequentially stacked, the energy buffer layer is made of a tough aramid fiber-ultra-high molecular weight polyethylene fiber / TPU composite material, the shear protection layer is made of a high-performance carbon fiber / TPU composite material, the tensile enhancement layer is made of a tough aramid fiber / TPU composite material, and the deformation energy absorption layer is made of a tough ultra-high molecular weight polyethylene fiber / TPU composite material. The novel hybrid fiber composite material has the advantages of light weight, high strength, good wear resistance and good protection performance, and has wide application prospects and market values in the fields of aerospace structural members, high-end equipment, protection devices and the like needing to bear high stress, high impact and complex loads.

The invention discloses a vibrating screen separation coal separator, which relates to the technical field of coal separation, and comprises a support seat and a turning mechanism, the support seat is provided with an anti-accumulation mechanism, a coal separation mechanism and a blanking buffer mechanism from left to right in sequence, and the coal separation mechanism is provided with an airflow dispersion mechanism and a turning mechanism. Through cooperation of the coal dressing mechanism and the anti-accumulation mechanism, the situation of coal accumulation during discharging is prevented, impact generated when coal directly enters the coal dressing mechanism is reduced, and the situation that the economic value is affected due to coal breaking is avoided; through cooperation of the coal dressing mechanism and the airflow dispersion mechanism, light coal materials are separated in advance, part of time needed for the light coal materials to reach the lowermost layer through layer-by-layer screening is saved, meanwhile, the dust suppression effect is achieved, and pollution caused by vertical vibration of the light coal materials in the long-time screening process is prevented; and through cooperation of the coal dressing mechanism, the airflow dispersion mechanism and the stirring mechanism, accumulation is avoided, meanwhile, the screening time is prolonged, and screening thoroughness is guaranteed.

The invention relates to the technical field of wave power generation, in particular to floating type wave power generation equipment with a variable energy capturing body structure and a controllable energy conversion system. The device comprises an upper buoy, a power generation cabin and a lower buoy which are sequentially connected from top to bottom, a bottom frame is arranged below the lower buoy, the bottom frame is fixed to the lower portion of the lower buoy through a base frame arranged in the middle of the bottom frame, a plurality of resistance adjusting assemblies are arranged on the periphery of the side wall of the bottom frame, and the outer wall of the upper buoy is movably sleeved with a floating body. The device is reasonable in structural design, mechanical and hydraulic transmission energy conversion modes are adopted, the energy conversion mode of power generation equipment can be changed in time according to the size of a wave condition, and under the normal wave condition, the mechanical and hydraulic hybrid transmission mode is adopted, so that the transmission efficiency is effectively improved; under the extreme wave condition, the floating body dives to the position below the sea surface, so that the impact load borne by the oscillating floating body is effectively reduced, the equipment is prevented from being impacted excessively, the reliability of the equipment is improved, the service life of the equipment is prolonged, and the problems existing in the prior art are solved.

The present invention discloses a clamping release device and a spacecraft, wherein the clamping release device comprises a first mounting base, a second mounting base, a flexible connector, an elastic member and a hot knife assembly; the first mounting base and the second mounting base are respectively fixedly connected to the flexible connector; the hot knife assembly is located between the first mounting base and the second mounting base, and is movably arranged on the second mounting base, and the flexible connector is located on the moving path of the hot knife assembly; the first end of the elastic member is connected to the second mounting base, and the second end of the elastic member is connected to the hot knife assembly, and the elastic member drives the hot knife assembly to abut against the flexible connector; the hot knife assembly is an electric heating structure, and the hot knife assembly fuses the flexible connector when power is turned on. The above scheme can achieve the technical effects of simplifying the structure, reducing the impact load and reducing pollution.

This utility model provides a motor lifting base, including a base plate and a top plate. A translation bracket is slidably connected to the top plate, and a support foot is fixedly connected to the top of the translation bracket. The support foot is used to install motor components. Translation drive components are connected to both sides of the translation bracket via screws and nuts. An adjusting rod one is rotatably connected to one side of the translation bracket via an extension rod, and an adjusting rod two is rotatably connected to the top of the base plate. The inner wall of adjusting rod one is slidably connected to the outside of adjusting rod two. The drive motor drives the synchronous component to drive the adjusting screws on both sides, realizing the synchronous and stable movement of the translation bracket. This facilitates the formation of an open installation platform in confined spaces. At the same time, adjusting rod one and adjusting rod two adopt a slanted platform compression and spring reset structure. A linear motor drives the compression slanted platform to push the positioning pin into the positioning hole, realizing rapid locking of length and angle, enhancing lateral support strength and improving adjustment efficiency, and avoiding damage to the bracket structure during motor installation.

The application discloses an industrial steel cutter with adjustable cutting depth and an implementation method thereof, and relates to the technical field of industrial cutting tools, aiming to solve the problem that most of the existing industrial steel cutters adopt fixed structures or simple bolt adjustment structures, the cutting depth of the fixed steel cutter cannot be adjusted, and the steel cutter can only adapt to a single machining condition, the bolt adjustment structure only relies on a single bolt locking, and cannot realize micron-level precision fine adjustment, and the technical scheme is as follows: the industrial steel cutter comprises a cutter body shell, a connecting seat with holes, a telescopic blade assembly, a fine adjustment driving assembly and a connecting assembly, a mounting cavity is arranged at the bottom of the cutter body shell, the connecting assembly is slidingly assembled in the mounting cavity, a driving cavity is arranged at the top of the cutter body shell, the telescopic blade assembly and the fine adjustment driving assembly are connected through the connecting assembly, the industrial steel cutter adopts a worm gear and differential variable pitch screw composite transmission structure, the worm gear has a speed reduction transmission effect, and micron-level cutting depth fine adjustment can be realized.

The utility model relates to an air suspension of a semitrailer, which comprises a guide arm support connected with a semitrailer body, a guide arm is rotatably hinged on the guide arm support, a shock absorber and a shock absorption steel plate are arranged on the guide arm, and two ends of the shock absorber are respectively arranged on an air bag component and the guide arm. The two ends of the shock absorption steel plate are arranged on the guide arm support and the guide arm respectively, the configuration distribution layout of shock absorption parts is optimized, the impact load on the shock absorber is effectively reduced, the shock absorption effect is good, and the driving smoothness and comfort of the semitrailer are guaranteed.

The invention discloses a multi-degree-of-freedom aerial oil receiving docking device which comprises an oil receiving docking mechanism installed on an oil receiving machine, the oil receiving docking mechanism comprises an oil receiving pipe A (2), one end of the oil receiving pipe A (2) is connected with a spanwise telescopic driving mechanism (1) installed in the oil receiving machine, and the other end of the oil receiving pipe A (2) is connected with an oil receiving pipe B (9) through a two-degree-of-freedom rotation driving mechanism (3). The oil receiving pipe B (9) is connected with the oil receiving pipe connector (4) through the connector rotation driving mechanism (5), and an oil receiving opening (10) is formed in the oil receiving pipe connector (4). The device occupies a small space in an aircraft body.

The invention relates to the technical field of electric power inspection and maintenance robot control, and discloses a power transmission line crawling robot lifting self-adaptive shake suppression control method and system. The method comprises the following steps: acquiring three-axis acceleration and three-axis angular velocity data of a robot platform, calculating a yaw angle and an angular velocity of the robot platform relative to a vertical balance position, and constructing an evaluation index representing the shaking strength of the platform; according to the shake strength evaluation index, driving parameters of a lifting motor are dynamically adjusted through a nonlinear mapping relation; and the swing period and phase of the robot platform are monitored, and when the platform swings to a specific phase point, an instantaneous driving pulse is applied to a lifting motor to consume swing energy. By means of the method, the maximum swing angle of the robot platform can be reduced by 60% or above, the static time after the robot platform reaches the target position is shortened by 70% or above, and the working efficiency is remarkably improved.

The utility model discloses a mooring device for an offshore floating body, which comprises an anchor pile, the top end of the anchor pile is fixedly connected with a mooring rope, the right end of the mooring rope is fixedly connected with a balancing weight, the balancing weight is internally provided with an elastic component, the right end of the elastic component is fixedly connected with an anchor chain, and the anchor chain is fixedly connected with the mooring rope. According to the device, the balancing weight is additionally arranged between the anchor pile and the anchor chain, when wind waves on the sea are large, the floating body shakes violently and large pulling force is generated on the anchor chain, the balancing weight can firstly bear the pulling force of the anchor chain, the pulling force cannot directly affect the stability of the anchor pile, and only when the pulling force is larger than the gravity of the balancing weight, the floating body can be fixed to the anchor pile. When the floating body anchor chain system shakes and drags the balancing weight, the pulling force can influence the anchor pile, the design of the section plays a buffering role, the impact load of the floating body anchor chain system can be effectively reduced, and the tensile capacity of the whole mooring system is obviously improved.

The utility model relates to the technical field of nylon tape traction devices, in particular to a nylon tape traction device with buffering and steering functions, which comprises a base, a cable guide, a bearing component, a buffering mechanism and a reel. The cable guide is connected with the base; the reel is vertically fixed on the base through a support frame, and a nylon tape is wound on a winding drum of the reel; the bearing assembly comprises a first bearing and a second bearing which are oppositely arranged, the first bearing is fixed to the base through a support, the second bearing is connected with the buffering mechanism, and the buffering mechanism is arranged on the base; and the nylon tape sequentially bypasses the first bearing and the second bearing and then is steered by the cable guider to vertically extend. By arranging a buffering mechanism, the impact load borne by the bearing is effectively reduced, and the service life of the device is prolonged; by arranging the first bearing, the second bearing and the cable guide, steering of the nylon belt is achieved, the structure is simple and easy to achieve, and buffering and direction switching are synchronously completed under the impact working condition in cooperation with the arrangement of the buffering mechanism.

The invention discloses an anti-vibration impact device for an asymmetrically distributed bending contraction expansion flow channel bore opening. An upper drainage flow channel, a lower drainage flow channel, a shot hole and a barrel mounting hole are formed in a body of the anti-vibration impact device; the barrel mounting hole is used for mounting the bore opening device at a barrel opening; the upper row of flow channels and the lower row of flow channels are communicated with the shot holes and are flow channels with gradually changed sections and bent central axes. Compared with an existing muzzle device, by means of the asymmetrical distribution design of the upper row of flow channels and the lower row of flow channels which are inclined to the axis of the barrel and are different in position but equal in inclination angle, more high-pressure gunpowder gas can be smoothly guided in to be ejected out of the inclined rear portions of the upper row of flow channels and the lower row of flow channels in an accelerated mode, and therefore larger reverse thrust aerodynamic force is generated; and meanwhile, transient resultant force and transverse power coupling effect are generated on the barrel in the forward direction of the barrel in the shooting process, so that the purposes of restraining vibration of a weapon bore opening and reducing impact on a carrying platform are achieved.

A driving assistance device (100) stores, in a storage device (18), information on a travel route (112) of a vehicle (102) driven by a driver, and when there is an automatic travel command from the driver, sets a target travel route (116) on the basis of the travel route information stored in the storage device (S140). When a magnitude of a vertical acceleration (Gz) equal to or greater than a reference value (Gzc) is detected when a vehicle driven by a driver travels (S80), the position is stored in a storage device (S90) together with information of a travel route (112) as a specific site of a road surface displacement, and the position is stored in the storage device (S90) together with information of the travel route (112) when the magnitude of the vertical acceleration (Gz) equal to or greater than the reference value (Gzc) is detected (S80) when the vehicle travels along the target travel route (112). The vehicle speed (V) is reduced (S190) when the vehicle passes through a location (Pc2) corresponding to the specific location during automatic travel.

The application relates to the field of bridge anti-collision structures, and discloses a bridge anti-collision structure with an energy consumption core material interlayer based on modular design, which comprises an energy consumption core material outer edge, the outer periphery of a bridge pier is sleeved with a ring of the energy consumption core material outer edge, and the two are connected through a head-tail closed guide ring; a plurality of groups of vertical guiding contact modules are slidably arranged on the guide ring in the circumferential direction, and each guiding contact module is an independent unit; each group of the guiding contact modules comprises two groups of telescopic buffer mechanisms, the fixed ends of which are rotationally connected with two rotating rollers. The vertical impact force is converted into the tangential force through the cooperation of the rotating roller one, the rotating roller two and the guide ring, the double energy consumption of the buffer spring and lubricating liquid is formed, the bridge pier impact resistance is improved, the lubricating liquid in the telescopic cavity is automatically sprayed and forms a closed loop lubrication through the collecting piece, the energy consumption core material outer edge and the inclined guide, the service life of the components is prolonged, the impact position range is indicated by the impact marking mechanism, the maintenance cycle is shortened, the cost is reduced, and the operation and maintenance efficiency is improved.

The application discloses a straw cutting and anti-winding integrated device for biomass fuel, and belongs to the field of biomass fuel processing equipment, which solves the problems of easy winding, low cutting precision and poor running stability of the existing straw cutting mechanism. The device comprises a mounting frame, a driving assembly, a rotary cutting assembly, a floating cutting assembly and a floating baffle assembly. The driving assembly drives an output driving shaft to drive the rotary cutting assembly to operate. The output driving shaft drives the floating cutting assembly through a gear reverser. The two are vertically arranged. The floating baffle assembly is hinged to the lower part of the mounting frame and below the rotary cutting assembly. The application adopts a double-stage cutting structure, cooperates with the anti-winding and buffering design, realizes accurate straw cutting and whole-process anti-winding, and has uniform cutting length. The device is stable in operation, low in maintenance cost, high in operation efficiency, and suitable for the large-scale processing of biomass fuel straw raw materials.

The present application relates to the technical field of air extractor, particularly relates to a direct drive improvement device of oil pumping unit; including tower body, platform, driver, shaft coupling, drum, crown assembly, belt, oil pumping rod, counterweight box and liquid cooling mechanism, the liquid cooling mechanism includes motor shell cooler, the platform is fixedly arranged on the top of the tower body, the driver, crown assembly and motor shell cooler are all fixedly arranged on the platform, the drum is rotatably arranged on the platform and located on one side of the driver, the driver and drum are drivingly connected through the shaft coupling, the crown assembly is located on one side of the driver, shaft coupling and drum, the belt is slidably arranged on the drum and crown assembly, the oil pumping rod and counterweight box are respectively fixedly arranged at two ends of the belt, the oil pumping rod is located on one side of the tower body, and the counterweight box is located below the platform; energy consumption is significantly reduced, frequent maintenance is not needed, and mechanical noise of the traditional reduction gearbox is eliminated.

The utility model discloses an anti-deformation waste material collecting device for metal material manufacturing, which relates to the technical field of metal waste material collection, and comprises a waste material box, a lifting structure arranged on the waste material box and used for limiting the descending distance of metal waste materials; the lifting structure comprises a first sliding groove, the first sliding groove is formed in the bottom of an inner cavity of the waste box, a driving motor is installed on one side of the waste box, a rotating shaft is fixed to an output shaft of the driving motor, the top of the waste box is sleeved with a hopper, and a second sliding groove is formed in the hopper. And a fixing shaft is fixed in the second sliding groove, and the outer surface of the fixing shaft is sleeved with a shear fork type lifting frame. The height of the hopper is dynamically adjusted through the shear fork type lifting frame, the height difference of metal waste falling into the waste box can be flexibly shortened or increased, impact force generated by free falling is reduced, the impact load of the waste on the waste box and an internal structure is remarkably reduced, and equipment is effectively prevented from being deformed and damaged.

The utility model provides a hydraulic prestressed steel pipe pile for building, which relates to the technical field of prestressed pile body structures, and comprises a steel pipe body, a pile body part, a pile tip part and a reinforcement cage, the upper end and the lower end of the steel pipe body are respectively provided with an upper pulling plate and a lower pulling plate; the reinforcement cage is located on the concrete pile body reinforcement cage and comprises a plurality of main reinforcements connected between the upper pulling plate and the lower pulling plate. The steel pipe pile has the advantages that the main reinforcements of the steel pipe pile are tensioned by the upper pulling plate and the lower pulling plate, so that the main reinforcements generate prestress, and the horizontal load bearing capacity and the vertical load bearing capacity of the steel pipe pile are improved; meanwhile, the pile body part of the steel pipe pile is poured outside the steel pipe body, and when the steel pipe body is impacted by a hammer body, the steel pipe body can share high impact resistance, so that the impact load of the pile body part of the steel pipe pile is reduced, the overall impact load resistance of the steel pipe pile is improved, the concrete pile body part can be effectively prevented from being damaged under the impact force of hammering, and the service life of the steel pipe pile is prolonged. The service life of the steel pipe pile is prolonged.

The utility model provides a spring testing machine and a reciprocating motion mechanism for the spring testing machine, including the frame, the frame is provided with a pressure head device, a drive device, a bearing table and a guide pillar, the drive device drives the pressure head device to reciprocate along the height direction of the guide pillar, the bearing table is arranged below the pressure head device, and the guide pillar is arranged on the bearing table. A to-be-tested spring is mounted between the pressure head device and the bearing table; the pressure head device comprises a pressure seat and a hinge table, the hinge table is respectively hinged with the pressure seat and the output end of the driving device, and the lower end of the pressure seat is connected with the upper end of the spring to be tested. The pressing rod and the pressing seat are hinged through the hinge table, so that the impact load on the driving device is reduced, the service life of the testing machine is prolonged, and the hinge connection structure adopts the rolling bearing group and is matched with lubrication, so that the service life of the testing machine can be further prolonged.

This invention belongs to the field of battery manufacturing technology, specifically a connection structure for the frame of a battery pack housing for new energy vehicles. It includes a water-cooled connection assembly, which comprises a base plate with flow channel ports at both ends. A water-cooled sealing strip is installed within each flow channel port. The water-cooled sealing strip, made of rubber, has a stepped recessed buffer cavity in the middle and an inverted conical structure formed by two inclined surfaces at its head. The interference fit between the sealing strip and the channel creates multiple sealing surfaces, maintaining partial sealing even if some loosening occurs. This also enhances friction with the inner wall of the channel, effectively reducing the risk of condensate leakage. The outer surface of the water-cooled sealing strip has diagonal anti-slip stripes, which can mechanically engage with the inner wall of the flow channel port, reducing axial movement and further improving structural stability.

The utility model provides a guide rod frame for hanging rock drilling and hanging type rock drilling equipment, and relates to the technical field of underwater rock drilling. According to the guide rod frame for hanging rock drilling, a main frame is hollow to form a cavity for movably fixing an underwater module, the underwater module is used for underwater rock drilling, the cavity is provided with an opening in the bottom of the guide rod frame, and the opening is used for allowing the rock drilling end of the underwater module to stretch out for rock drilling. According to the embodiment of the invention, the underwater module of the hanging type rock drilling equipment is movably fixed in the main frame of the guide rod frame, and the rock drilling position of the underwater module is limited through the guide rod frame, so that the deviation of the rock drilling position is effectively reduced, the rock drilling effect is improved, and the situation that the underwater module rapidly descends due to the change of an external environment can be prevented; the impact load is effectively reduced, so that the condition that the pulling rope is broken or equipment is damaged is avoided.

The present invention relates to a tailwater artificial wetland treatment system and method for enhanced denitrification and phosphorus removal, which comprises a pre-pond, a micron aerated vertical submerged flow wetland, a vertical submerged flow wetland, a horizontal submerged flow wetland and a stabilization pond arranged in sequence; an immersion bioreactor is arranged in the pre-pond, an integrated air / water distributor is arranged at the bottom of the micron aerated vertical submerged flow wetland, a calcareous centimeter stone and a slow-release carbon source composite functional filler are arranged in the vertical submerged flow wetland, and a slow-release carbon source composite functional filler and a sulfur iron functional filler are arranged in the horizontal direction in the horizontal submerged flow wetland. The system first performs preliminary purification, and then performs heteroaerobic denitrification and autoaerobic denitrification in deep purification, and simultaneously enhances phosphorus removal. It has the advantages of reasonable structural design, uniform water distribution and water collection, strong synchronous denitrification and phosphorus removal capabilities, and good winter operation effects, and significantly improves the denitrification and phosphorus removal capabilities and self-repair capabilities of the tailwater artificial wetland system, and has the advantages of ecological naturalness, high efficiency and stability, simple maintenance, and economical and practical.

The application provides a WC-based hard alloy material for drilling super-deep wells, relates to the technical field of hard alloys, and is composed of a wear-resistant layer, a transition layer and a toughened supporting layer. The wear-resistant layer, the transition layer and the toughened supporting layer all include base alloy components and additive components. The base alloy components of the three layers all include WC powder, Ni powder, Co powder, Cr powder, Mo powder, NbC powder, Cr3C2 powder and VC powder. The WC powder particle size increases gradually between the wear-resistant layer, the transition layer and the toughened layer, and the Cr3C2 powder addition amount of the three layers is different. The material is designed by the partition organization of the wear-resistant layer, the transition layer and the toughened supporting layer, so that the WC-based hard alloy material is obtained. While the high corrosion resistance, erosion resistance and wear resistance are maintained, the local anti-cracking and anti-contact fatigue capacity of the sealing contact area is improved.

The invention discloses an automatic control crank gantry press and a control method thereof, and mainly relates to the field of hydraulic machines. Comprising a portal frame body arranged on the ground, pressing mechanisms symmetrically arranged on the portal frame body, cushion blocks, trolleys and a plurality of trolley positioning mechanisms arranged below the portal frame body. The trolley is loaded with a single trolley frame body, the trolley positioning mechanism is used for limiting the trolley, the cushion block is matched with a mounting hole of a single trolley crank, the pressing mechanism on the portal frame body is used for centering and pressing the trolley, and the cushion block is used for increasing the contact area of the crank and the pressing mechanism. The device has the beneficial effects that the device is used in the assembling process of the crank and the middle shaft of the bicycle, the assembling precision is high, the assembling process is safer, manual operation is greatly reduced, the stress range of the original uneven crank surface is enlarged through the cushion block, the stress of the crank surface is more uniform, the assembling effect is better, and the assembling efficiency is improved. And in the pressing process, pressing can be conducted in the middle shaft direction.