361results about How to "Reduce intensity" patented technology

The invention provides an ultra-high-speed electric connector which comprises an insulating body, the insulating body is provided with a lengthwise slot, a plurality of terminal slots are formed in lengthwise side walls on the two sides of the slot respectively, and a fool-proof part is arranged in the slot and used for dividing the insulating body into a power supply and low-speed signal area and a high-speed signal area which are located on the two sides of the fool-proof part; the plurality of terminals comprise differential signal terminals distributed in the high-speed signal area and other terminals distributed in the high-speed signal area and the power supply and low-speed signal area, every two differential signal terminals are adjacent, and two sides of every two adjacent differential signal terminals are respectively provided with a grounding terminal; every two adjacent differential signal terminals and two grounding terminals located on the two sides of the two differential signal terminals form a terminal module, and the two differential signal terminals and the two grounding terminals of each terminal module and an insulating block inserted into the insulating body are formed in an embedded mode. The ultra-high-speed electric connector can enable signal transmission to be better and more stable.

The invention discloses a low-dielectric low-loss high-strength borosilicate glass ceramic composite material and a preparation method thereof, and belongs to the technical field of borosilicate glass ceramic composites.The low-dielectric low-loss high-strength borosilicate glass ceramic composite material is prepared from, by weight, 70% of low-alkali borosilicate glass ceramics with the low borosilicate ratio, 29% of Al2O3 and 1% of Bi2O3. The preparation method comprises the following steps: preparing low-alkali borosilicate glass ceramics with a high borosilicate ratio, melting the low-alkali borosilicate glass ceramics with the high borosilicate ratio and amorphous SiO2 at a set temperature to obtain the required low-alkali borosilicate glass ceramics with the low borosilicate ratio, and finally mixing and ball-milling the crushed and ground low-alkali borosilicate glass ceramics with Al2O3 and Bi2O3 to obtain the low-alkali borosilicate glass ceramics with the low borosilicate ratio. And finally, the borosilicate glass ceramic composite material is sintered at the temperature of 880-900 DEG C. The borosilicate microcrystalline glass ceramic composite material is low in dielectric, low in loss and high in strength.

The utility model discloses a vibration and noise reduction type screen body structure of a high-efficiency vibrating screen, relates to the technical field of vibrating screens, and aims to solve the problem that in an existing vibration reduction scheme, passive vibration reduction elements such as springs or rubber pads are mostly additionally arranged, but bidirectional control of screen mesh fastening and vibration conduction is difficult to be considered at the same time. A set of vibration reduction rubber strips are installed between the containing beam and the screen in a pressed mode, a rotating groove and a driving groove are formed in the top face of the containing beam, a locking assembly is arranged in the rotating groove, a driving assembly is arranged in the driving groove, a groove is formed in the bottom face of the screen, a hanging rod is arranged in the groove, and the hanging rod is in sliding connection with the locking assembly. An elastic interlayer is formed by the vibration reduction rubber strips arranged between the screen and the placing beams, transient vibration energy generated by material impact can be effectively absorbed, mechanical energy is converted into heat energy through viscoelastic deformation of high polymer materials in the rubber strips, and the strength of vibration transmitted to the screen body is reduced.

The application belongs to the technical field of molds, and particularly relates to a mold for manufacturing a gas chamber core with an exhaust passage and a use method thereof. In order to solve the problems in the prior art that, when the exhaust passage of the gas chamber core is manufactured, the mold for the gas chamber core is provided with a movable block, the movable block cannot be placed with a filler, the punching method is used to cause low production efficiency and high production cost, and manual placement of the movable block causes production safety risks in the prior art. The application comprises a mold body, a movable block and a power device. The mold body is internally provided with a cavity of the gas chamber core, and a sand shooting port is arranged on the side surface and communicates with the cavity. The cavity comprises a cavity of the gas chamber core body and a connecting side cavity. The position of the connecting side cavity corresponds to the position of a connecting end of the gas chamber core and a runner core. The cavity of the gas chamber core body communicates with the connecting side cavity. The movable block is slidingly installed in the connecting side cavity, one end of the movable block is connected with a power end of the power device, and the other end of the movable block is internally provided with a hollow cavity. A heat insulation piece is installed in the hollow cavity.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

The invention provides a rock debris sampling device, and relates to the technical field of geological exploration. The rock debris sampling device comprises a mounting seat, and a sampling mechanism, a screening mechanism, a leveling mechanism and a rock debris storage cylinder which are arranged on the mounting seat, the sampling mechanism comprises a sampling claw which can be switched between a grabbing state and a releasing state; the screening mechanism comprises a screening frame, and the screening frame can rotate to the position under the sampling claw to be in a bearing state and away from the sampling claw to be in a shutdown state; in the receiving state, the screening frame is used for receiving and screening rock debris samples released by the sampling claw, and the screened rock debris samples fall into a rock debris storage cylinder arranged below the screening frame; and the leveling mechanism can level and compact the rock debris samples falling into the rock debris storage cylinder through a leveling plate. According to the rock debris sampling device, sampling of rock debris samples is completed through cooperation of the sampling mechanism, the screening mechanism and the leveling mechanism, the labor intensity of workers is reduced, and the problem that in the prior art, the labor intensity of the workers is large due to continuous sampling is solved.

The invention discloses an ultrasonic zoning excitation auxiliary rock breaking device which comprises a rock mass inherent frequency zoning detection system and an ultrasonic zoning excitation system, the ultrasonic zoning excitation auxiliary rock breaking device is installed on a rock drill through a cylindrical fastening propelling device, and a hydraulic propelling device ensures that a compaction sector ring is tightly attached to a rock mass; the rock mass inherent frequency partition detection system performs annular partition amplitude detection on the surface of a rock mass through a compaction sector ring, data is transmitted to an amplitude data collection system and an inherent frequency analyzer, and inherent frequencies of all partitions are determined and transmitted to an ultrasonic generator; high-frequency alternating currents with different frequencies are input into the ultrasonic generator, the high-frequency alternating currents are input into the ultrasonic transducers which are annularly arranged and mutually independent through the circuit control system according to the frequencies, and vibration generated by the ultrasonic transducers is concentrated to the compaction sector ring at the top end through the amplitude-change pole. And performing partition excitation of different frequencies on the construction rock mass. Therefore, large-range and high-efficiency excitation of the rock mass is realized.

The application discloses an intelligent dust removal device for waste gas treatment of a coal-fired power plant, and relates to the technical field of waste gas treatment.The device comprises a dust removal box, an air inlet fixedly connected to the side wall of the dust removal box, a filter plate fixedly connected to the inside of the dust removal box, and a filter effect real-time detection mechanism and a dust cleaning and collecting mechanism.The device can reduce unnecessary troubleshooting and maintenance frequency, thereby reducing maintenance cost and time cost, and can maintain or replace the clogged or damaged filter plate in time when the filter plate is damaged, so that the continuous and efficient operation of the spray dust removal system can be ensured, and the overall operation efficiency is improved.Further, the device can avoid long-time use of the filter plate without timely maintenance or replacement, so that impurities and particulate matter can be prevented from entering the spray dust removal system, the cleanliness of water resources is ensured, and the overall performance of the spray dust removal system is improved.

The utility model belongs to packaging production technical field especially is a kind of fresh flower packaging bag stacking device.The utility model discloses through setting the two groups of recesses of the inside opening of mobile collection groove, form double collection groove and collect in the lower of discharge port, again through the characteristics that mobile collection groove can move, only need to pass a group of second cylinder drive telescopic, the conversion between the upper collection groove of mobile collection groove can be realized, after the collection of one side is finished, it can be instantaneously replaced to the other side, can realize uninterrupted production;Through setting the first cylinder installed on the both sides of machine body, the side after collection can be ejected using connecting block, so that operator carries out unified collection stacking in the side away from device, can effectively reduce the strength of manual operation, also can effectively avoid the accident caused by being close to device.

The application discloses a non-premixed combustor capable of simultaneously generating oxidation environment and reduction environment and relates to the technical field of combustors.The combustor comprises an oxidation gas cavity cover plate, an oxidation gas cavity I, an oxidation gas cavity II, a fuel gas cavity I, a fuel gas cavity II, a gas fuel pipe group and a center powder feeding pipe and the like modules, can simultaneously generate oxidation environment and reduction environment, and can flexibly replace different types of optical windows, flexibly adjust flame intensity and flexibly adjust the length of the center powder feeding pipe extending out of the oxidation gas cavity cover plate, is a non-premixed combustor capable of simultaneously generating oxidation environment and reduction environment, and has the advantages of simple and compact structure, safe and convenient operation, high flexibility and stable planar flame generation.

This invention discloses a Mg-modified hydrogenation catalyst and its preparation method. The Mg-modified hydrogenation catalyst is a sulfide-state catalyst, comprising a support, active metals Mo and Ni, and Mg. Characterized by TEM-EDS, the Mg content distributed in the Ni-Mo-S active phase region accounts for 65%-90% of the total Mg content. The modified hydrogenation catalyst of this invention can be used to treat low-quality secondary processed heavy oils, exhibiting good processing capacity and stability, especially for feedstocks with high olefin content.

The application belongs to the technical field of cloth cleaning machines, and discloses a low-noise cloth cleaning machine, which comprises a main body and a cleaning brush head, the main body comprises a base and a main shell, an air outlet mesh hole is formed in the base, a clean water tank and a sewage tank are arranged on the two sides of the main shell respectively, a clean water box and a sewage box are arranged in the clean water tank and the sewage tank respectively, an L-shaped elbow and an elbow joint are arranged at the bottom of the main shell, and the L-shaped elbow and the elbow joint are connected with the cleaning brush head at the outer end; an air outlet groove plate is arranged on the base, a fan assembly is arranged on the air outlet groove plate, an arc-shaped air hole is formed at the air outlet end of the fan assembly, an L-shaped baffle is arranged on the bottom surface of the air outlet groove plate along the edge of the arc-shaped air hole, an arc-shaped air deflector is arranged between the L-shaped baffle and the air outlet mesh hole, and the air inlet end of the fan assembly is connected to the air outlet of the sewage tank. The airflow direction is guided by the L-shaped baffle and the arc-shaped air deflector, so that the airflow flows more uniformly and stably, the turbulence and vortex intensity of the airflow are reduced, the working noise is reduced, and the user experience effect is improved.

The invention relates to the technical field of brake disc materials, and discloses a brake disc material prepared from a carbon-ceramic composite material and a processing technology thereof.The processing technology comprises the following steps that phenolic resin, carbon powder, metal oxide, composite carbon fibers and a pore forming agent are evenly mixed and then placed in a mold, and a composite material prefabricated body is obtained through compression molding and cold water demolding; processing the composite material preform to form a carbon-ceramic brake disc rough blank, and then performing carbonization treatment to obtain a carbonized composite material; and mixing the carbonized composite material with silicon powder, carrying out siliconizing treatment, soaking in a protective solution, sintering, taking out, polishing and perforating to obtain the brake disc material prepared from the carbon-ceramic composite material. The composite carbon fiber contains a large number of silicon hydroxyl groups and can be tightly combined with phenolic resin, carbon powder, metal oxide and a pore-forming agent, and the polycarbosilane layer generates a nanoscale silicon carbide phase, so that the mechanical property and wear resistance of the brake disc material prepared from the carbon-ceramic composite material can be improved.

A laser-assisted positioning mechanism for spinning belongs to the technical field of mechanical processing. The mechanism aims to solve the problems of low precision and long calibration time in the traditional positioning method of multi-axis numerical control spinning equipment. It includes a sliding table module composed of a sliding table support and a sliding table body. The sliding table body is connected to the sliding table support through a linear guide rail. A servo motor drives the displacement of the sliding table body through a synchronous belt transmission mechanism, which includes a first synchronous wheel, a second synchronous wheel, and a closed-loop synchronous belt. The bottom of the sliding table body is fixed to the synchronous belt. A laser level is rigidly fixed to the side of the sliding table body through four symmetrical mounting holes and a mounting slot, projecting a laser reference line parallel to the axis of the spinning wheel. The bottom of the sliding table support is provided with a double fixed seat, which is rigidly connected to the processing platform through bolts. The mechanism realizes a displacement accuracy of 0.1 millimeters through closed-loop control of the servo motor, allowing the laser reference line to be dynamically adjusted along the axis of the spinning wheel.

The invention relates to an autoclaved aerated concrete block based on an all-solid waste material and a preparation method thereof, and relates to the technical field of building material processing. Comprising the following components in parts by weight: 25-30 parts of an all-solid waste cementing material, 60-70 parts of construction waste micro powder, 0.05-0.1 part of aluminum powder, 0.02-0.06 part of a foam stabilizer and 60-70 parts of water, the all-solid waste cementing material is prepared from slag, fly ash, steel slag, desulfurized gypsum and red mud according to a mass ratio of (40-60): (20-35): (10-20): (5-15): (5-10); the construction waste micro powder is prepared from recycled concrete micro powder and brick powder according to a mass ratio of (60-70): (30-40). The dry density and compressive strength of the product prepared by the method can stably reach B07 and A5.0 grade standards, and the cost is lower.

The utility model discloses a clamping formula liquid turbine flowmeter relates to flowmeter technical field, and the utility model discloses a flowmeter main part is equipped with clamping assembly at the both ends of flowmeter main part, and clamping assembly includes sleeve joint ring, and two of sleeve joint ring are set up, and one sleeve joint ring fixedly set up at the one end of flowmeter main part, and the other sleeve joint ring fixedly set up at the other end of flowmeter main part, and two rack plates are fixedly arranged on the outer wall of sleeve joint ring, in the utility model, by setting clamping assembly at the both ends of flowmeter main part, when the flange plate of pipe fitting end portion enters the inside of sleeve joint ring, by driving limit ring plate horizontal movement, can limit to flange plate, make flange plate fixed in the end of flowmeter main part, to conveniently realized the installation of flowmeter main part, and then effectively improved the convenience of flowmeter main part installation operation, reduced installation operation intensity simultaneously.

The utility model discloses a kind of prosthetic knee joint shell and artificial limb, shell has the accommodation cavity for installing knee joint component, the cavity wall of accommodation cavity is equipped with weight reduction structure, weight reduction structure includes at least one recess provided in the cavity wall of accommodation cavity;And / or, at least one hollow hole through the inner surface and outer surface of the cavity wall of accommodation cavity.This application utilizes space structure optimization to replace the traditional material accumulation mode, recess realizes weight reduction by reducing the volume of local material of cavity wall, hollow hole further reduces weight by forming hollow structure through the cavity wall, the combination of both effectively reduces the overall weight of shell under the premise of ensuring that the accommodation cavity can normally install knee joint component.Meanwhile, the reasonable layout of recess and hollow hole can disperse stress concentration area, avoid the strength decline due to weight reduction, ensure that shell has good structural strength, provide reliable protection for internal components.In addition, due to the reduction of material usage, production manufacturing cost is reduced.

The utility model provides a kind of ECC bridge crash barrier belongs to ECC bridge field, including frame, energy-absorbing installation component being arranged in the inside of frame and support fixed component being arranged on the surface of frame, energy-absorbing installation component includes the vertical barrel being arranged in the inside of frame, vertical barrel is internally provided with inner chamber, detachably connected with water storage bucket in inner chamber, internally fixedly connected with fixed column, energy-absorbing is carried out by vertical barrel, support fixed component includes the support rod of detachably connected in one side of the surface of frame, the utility model frame inside both ends are equipped with connecting seat, connecting seat is attached to the inside surface of frame, wherein connecting seat surface is all provided with connecting hole, fixed column surface is equipped with vertical barrel, vertical barrel is installed to water storage bucket by the inner chamber being internally provided, water storage is carried out by water storage bucket, energy-absorbing work is carried out when collision occurs, increase the anti-collision property of whole, and then ECC bridge crash barrier is used, and the energy-absorbing property of whole is higher.

This application relates to the field of printing equipment technology, and provides a monochrome pad printing device and method, which includes a base, a rotary table, positioning blocks, a feeding assembly, a pad printing assembly, and a discharging assembly. The rotary table is rotatably connected to the base via a stepper motor. Several positioning blocks are disposed on the rotary table and spaced apart along the rotation direction of the rotary table. The positioning blocks are used to place the workpiece to be printed. The feeding assembly, pad printing assembly, and discharging assembly are arranged sequentially along the rotation direction of the rotary table. The feeding assembly transfers the workpiece to be printed onto the positioning blocks. The pad printing assembly presses the workpiece onto the positioning blocks. The discharging assembly unloads the printed workpiece. This application has the effect of facilitating the feeding, pad printing, and unloading of workpieces, thereby improving production efficiency.

The invention provides a rotating wheel of an open type steel bar wrench. The rotating wheel comprises an open rotating wheel body, a sliding way A, a sliding way B, a clamping head A and a clamping head B, the front end of the open runner is provided with a radial opening; gear teeth are arranged on the outer circumference of the opening rotating wheel; the slideway A is obliquely arranged on the upper end face of the opening runner and located on one side of the radial opening; the slideway B is arranged on the upper end surface of the opening rotating wheel and is positioned on the other side of the radial opening; the clamping head A is mounted in the slide way A in a sliding manner; the clamping head B is mounted in the slide way B in a position-adjustable manner; the steel bar is clamped through the cooperation of the clamping head A and the clamping head B; the clamping head A and the clamping head B are located at the upper end of the opening rotating wheel and exposed, the structure is simple, meanwhile, the position of the clamping head B can be conveniently adjusted, the tool storage cost of a construction site and the time cost for searching and matching external tools do not need to be additionally increased, the abrasion conditions of the clamping head A and the clamping head B are easy to observe, and replacement is easy.

This utility model relates to the field of dust control equipment technology and discloses a closed-type dust control device with an air curtain for mining operations. It includes a first support frame and a second support frame installed on one side of a continuous mining machine. A motor is fixedly installed on one side of the first support frame, and a threaded rod is fixedly installed at the output end of the motor passing through the first support frame. The end of the threaded rod away from the motor is rotatably connected to the inner wall of the first support frame. A sliding rod is fixedly installed on the inner wall of the second support frame. This utility model utilizes an infrared ranging sensor to monitor the relative position S between the continuous mining machine and the air curtain device in real time. Combined with a controller driving a motor to dynamically adjust the position of the U-shaped frame, the closed air curtain formed by the transverse and radial air curtain generators accurately covers the dust-generating area of ​​the continuous mining machine. This solves the problem of coverage offset caused by the advancement of equipment in traditional fixed air curtains, reduces blind spots in dust control, and ensures the continuity and stability of dust control effects.

This invention discloses a method for coordinated optimization and low-carbon operation of a boiler-thermal power system in a thermal power plant, relating to the field of thermal power generation technology. The method includes: acquiring real-time fuel quality data, screening, drying, proportioning, and grinding the fuel to prepare qualified pulverized coal; dynamically adjusting the air-coal ratio based on unit load and combustion status, controlling furnace operating conditions and linking turbine parameters to maintain thermal system balance; collecting real-time equipment operating data, assessing remaining lifespan through a short-term memory network, and performing maintenance or parameter correction accordingly; recovering boiler and steam waste heat for plant heating, and coordinating the biomass co-firing ratio and pollutant capture parameters to achieve low-carbon emissions. This invention reduces coal consumption and heat loss by constructing a coordinated control system across the entire fuel-combustion-power chain; and achieves ultra-low emissions and a significant reduction in carbon emission intensity by combining equipment health management and waste heat low-carbon coupling technology.

The utility model belongs to the technical field of petroleum workover equipment, concretely relates to a hydraulic tong station adjusting device and workover equipment, including the adjusting frame and the chassis, the longitudinal beam that sets up two hydraulic cylinders in the middle part of chassis is hinged, the piston rod end of two hydraulic cylinders all is hinged on the adjusting frame, the adjusting frame is driven its rotation around the axis of articulation shaft and drives hydraulic tong swing relative to the chassis by the piston rod telescopic drive of hydraulic cylinder, when the adjusting frame swings to the second end of chassis, and the limit support that this end of chassis is perpendicular fixed limits the contact. The utility model has realized the continuous, stable and automatic swing switching of hydraulic tong from the work position to the retreat position, reduced the strength of manual operation, improved the operation efficiency, reduced the operation error and the security risk caused by human factor, ensured that the hydraulic tong in non - working state, the equipment can absolutely stably keep in the retreat position, satisfied the extreme requirement of safety of wellhead unmanned operation.

The utility model relates to the technical field of detection, and provides a pipeline inner wall defect detection device which comprises a frame used for moving in a pipeline, wheels arranged in a swinging mode relative to the frame, after the wheels are configured to swing, the axes of the wheels are perpendicular to the axis of the pipeline, a detection adjusting frame is arranged on the frame, and the detection adjusting frame is arranged on the frame. The detection adjusting frame comprises a fixing piece which is arranged in a swinging mode, and the detection device is arranged on the fixing piece. By means of the technical scheme, the technical problem that in the prior art, defect detection of the inner wall of a small-pipe-diameter pipeline is inconvenient is solved, and damage detection of the small-pipe-diameter inner wall is achieved.

This application provides a method and system for elastic scheduling of containerized resources in a cloud computing environment, relating to the field of elastic scheduling technology for containerized resources. This application generates detailed data recording the resource competition relationships between tenants by acquiring various resource contention events; identifies preset high-frequency conflict patterns through in-depth data analysis, determining specific tenant groups with strong resource mutual exclusion effects; dynamically estimates the probability level of resource conflicts between new containers and specific tenant groups by combining historical contention information and real-time resource load status; generates a dynamic isolation scheduling strategy based on the conflict risk indicated by the probability level; and configures and adjusts independent conflict buffer resource pools for designated key tenants. This enables the identification of tenant resource conflict patterns and the implementation of dynamic isolation scheduling and buffer resource configuration, improving the resource utilization efficiency and system stability of multi-tenant containers in a cloud computing environment.

The invention belongs to the field of waste liquid recycling, and discloses a method for preparing potassium fluosilicate by using mixed waste acid, which comprises the following steps: S1, silica fume acidification pretreatment: soaking silica fume in an acid solution for acidification, carrying out precipitation separation on the silica fume, drying, and grinding to obtain acidified silica fume; s2, mixing the raw materials: uniformly mixing the acidified silica fume and the silicon dioxide powder; s3, preparation of fluosilicic acid: adding a mixture of acidified silica fume and silicon dioxide powder into the mixed waste acid, and uniformly stirring by a mechanical stirrer; and S4, preparation of potassium fluosilicate: adding a potassium chloride saturated solution into the fluosilicic acid solution to generate potassium fluosilicate precipitate. The method has the advantages and effects of being high in fluorine ion utilization efficiency, low in production cost and high in finished product purity.

The utility model relates to the technical field of heat dissipation between frequency conversion equipment, and mainly discloses a fluid buffer reversing structure and a test device for measuring the heat dissipating capacity of an SFC machine room, the fluid buffer reversing structure comprises a pipe body, and the pipe body comprises a main pipe and a branch pipe fixed at the outlet of the main pipe in a sealing manner at an included angle; the reversing plate is movably arranged in a cavity at the junction of the main pipe and the branch pipe; wherein the reversing plate divides an inner cavity of the branch pipe to form a first cavity and a second cavity, and the first cavity and the second cavity alternately communicate with a fluid cavity of the pipe body; the fan assembly is fixed with the inlet of the pipe body; the temperature control assembly comprises a concentric-square-shaped pipe, a preheater and a refrigerator, the two ends of a branch pipe are communicated with an upstream pipeline of the concentric-square-shaped pipe, and the preheater and the refrigerator are fixed to the two parallel side pipe walls of the concentric-square-shaped pipe respectively; the machine room assembly comprises a model chamber and a heat source, the heat source is fixedly connected in the model chamber, and the downstream of the concentric-square-shaped pipe communicates with the model chamber; the problem that in an air supply system of a traditional test device, the air speed at the joint of branch pipes is unstable, and the measurement result is affected is solved.

The utility model belongs to the technical field of livestock breeding equipment, and particularly relates to a livestock breeding feeding trough which comprises a trough body, a supporting frame, a supporting moving assembly, a supporting adjusting assembly, a cleaning adjusting assembly, a cleaning scraping strip, a dip angle adjusting assembly and a hollow shaft. The hollow shaft is rotatably installed on the groove body, the hollow shaft is fixedly installed on the supporting frame, the supporting moving assembly is arranged on the bottom side of the supporting frame, and the supporting adjusting assembly is arranged on the supporting frame and connected with the supporting moving assembly; the inner side and the outer side of the groove body are arranged in a cambered surface mode, the dip angle adjusting assembly is arranged on the supporting frame and connected with the groove body, and the cleaning scraping strip is installed on the groove body in a sliding mode and makes contact with the inner wall of the groove body. The automatic feeding device is reasonable in design, integrates functionality, durability and maintainability, greatly reduces the intensity of manual operation, improves the breeding efficiency, and has wide popularization value.

The invention discloses an optical imaging device, the optical imaging device comprises a lens barrel, a lens group and a spacing element group, the lens group and the spacing element group are assembled in the lens barrel, the lens group comprises a first lens, a second lens, a third lens, a fourth lens and an eighth lens which are sequentially arranged from an object side to an image side along an optical axis, and an air gap is formed between every two adjacent lenses on the optical axis; the spacing element group comprises a first spacing element positioned between the first lens and the second lens and contacted with the image side surface of the first lens; the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging device satisfy 1.6 lt; f1 / flt; 3; the aperture value fno of the optical imaging device is not less than 1.50 and not more than fnolt; 1.6); the distance EP01 from the object side end surface of the lens barrel to the object side surface of the first spacing element on the optical axis, the center thickness CT1 of the first lens on the optical axis and the refractive index N1 of the first lens satisfy 0.75 lt; eP01 / (CT1 * N1) lt; and 1.4.

The utility model relates to the technical field of mechanical engineering, in particular to a manual switching-on and switching-off operation structure, which comprises a switching-on and switching-off box body, the right side of the switching-on and switching-off box body is rotatably connected with a handle mechanism, the handle mechanism comprises a connecting shaft, and the connecting shaft is rotatably connected to the right side of the switching-on and switching-off box body. The outer wall of the connecting shaft is fixedly sleeved with a driving arm, and an operation shaft mechanism is fixed to the top end of the opening and closing box body through a bolt and penetrates through the opening and closing box body to be fixed inside the opening and closing box body. According to the utility model, through mutual cooperation of internal parts of the handle mechanism, the problem that the operation of the driving arm is laborious is solved, the rotation of the connecting shaft is locked and limited, the stability of the driving arm is improved, and through mutual cooperation of internal parts of the operation shaft mechanism, a plurality of driving plates are located at two sides of a circuit breaker switching-on and switching-off rod. And the stress uniformity between the driving plate and the circuit breaker switching-on and switching-off rod is improved, so that the switching-on and switching-off operation of the circuit breaker switching-on and switching-off rod is completed.