297results about How to "Effective absorption" patented technology

This invention provides a split Hopkinson bar device for achieving single-pulse loading, comprising an incident bar, a transmission bar, an incident wave-catching unit, and a stress wave generating unit. The incident wave-catching unit includes an incident wave-catching sleeve and an absorbing bar. One end of the absorbing bar is spaced apart from the incident bar flange, and the other end is connected to the absorbing bar flange. The incident wave-catching sleeve is fitted around the absorbing bar, with its two ends respectively fitting against the absorbing bar flange and the incident bar flange. The compressive stress wave generated by the stress wave generating unit is reflected by the incident bar flange to form a tensile stress wave. After loading the sample, a portion of the stress wave is reflected back as a compressive wave and absorbed by the incident wave-catching unit. This solves the problem of multiple reflections and interference in traditional Hopkinson bars, achieving pure single-pulse tensile loading. The device is compact, has high energy utilization, and is suitable for testing the dynamic mechanical properties of materials.

The utility model discloses a countercurrent absorption device for sulfurous acid, which consists of a process water pipe, a tail gas fan, a third-stage absorption tower, a second-stage absorption tower, a shower nozzle, a first-stage absorption tower, a finished product acid pump, a sulfur furnace, a circulating acid pump and a baffle plate. According to the sulfur dioxide absorption tower disclosed by the invention, the problems that sulfur dioxide gas is not thoroughly absorbed and tail gas pollutes the environment in a sulfurous acid preparation process are solved by adopting countercurrent absorption of the flow direction of sulfur dioxide gas and the flow direction of process water and adopting an absorption mode of combining a shower nozzle and baffle plate water distribution; the sulfur dioxide gas absorption efficiency is high, and equipment and power energy are saved.

This invention belongs to the technical field of environmental engineering, specifically relating to an environmentally friendly purification method and system. The method effectively improves the comprehensiveness and systematic nature of purification by strictly controlling the quality, dosing rate, and energy efficiency of the reducing agent, and through simulation and practical exercises. The purification method of this invention is stable, controllable, and reliable, enabling the purification effect of waste gas to meet the required new standards.

This application relates to a short-circuit detection device for battery cells in a winding machine, belonging to the field of battery cell detection technology. To solve the problem of short-circuited battery cells occupying processing time, it includes a detection mechanism arranged on one side of the cold pressing plate of the winding machine. The detection mechanism includes a support frame, a transverse carrier plate, a lifting drive cylinder, a detection plate body, and a detection probe assembly. The support frame is arranged on one side of the cold pressing plate, the transverse carrier plate is arranged on the support frame, the lifting drive cylinder is vertically connected to the transverse carrier plate, and the piston end of the lifting drive cylinder is connected to the detection plate body. The detection probe assembly includes positive electrode detection probes and negative electrode detection probes, which are distributed on the end face of the detection plate body. The support frame is provided with a transverse movement mechanism for driving the transverse carrier plate. This application effectively ensures that short-circuited battery cells are effectively identified and rejected before hot pressing, preventing short-circuited battery cells from occupying hot pressing equipment time and significantly improving production efficiency.

The present invention relates to the technical field of functional materials, and in particular to an amorphous metal oxide hollow multi-shell material and a preparation method therefor and an application thereof. The method includes the following steps: 1) performing a heating reaction on a carbon source aqueous solution, filtering, washing, and drying to obtain a carbon sphere template; 2) dispersing the carbon sphere template obtained in step 1) in a first metal salt solution, heating, adsorbing, and drying to obtain a first solid precursor; 3) dispersing the solid precursor obtained in step 2) in a second metal salt solution again, adsorbing, and drying to obtain a second solid precursor; and 4) calcinating the second solid precursor obtained in step 3) to obtain the amorphous metal oxide hollow multi-shell material. According to the present invention, a defect-controllable doping energy level is introduced into a metal oxide hollow sphere by means of a two-step enhanced adsorption method, so that efficient absorption of wave bands in a solar spectrum is achieved.

The utility model discloses a multistage hot air circulation device for titanium concentrate drying, which belongs to the technical field of mineral drying, and is characterized by comprising a working box, the right side of the working box is fixedly connected with a drying mechanism, the left side of the working box is fixedly connected with a circulation mechanism, and the front side of the working box is rotatably connected with a heat insulation door. The drying mechanism feeds hot air from the top and the bottom of the working box through the air inlet pipe and the air expanding hopper, multi-stage hot air heating is achieved, the titanium concentrate can be evenly heated in the working box, the drying uniformity and efficiency are improved, the drying mechanism can be automatically controlled through the PLC, and according to the characteristics and drying requirements of the titanium concentrate, the drying efficiency is improved. The working state of the hot air generator is adjusted, intelligent drying is achieved, the drying quality and the production efficiency are improved, the circulating mechanism can lead out hot air in the working box, the hot air is sent back into the working box after moisture absorption treatment, hot air recycling is achieved, and the energy utilization rate is increased.

The utility model belongs to the technical field of seat, disclose a kind of multilayer fire -retardant noise absorption seat backplate, including backplate body, the backplate body is made of five layers structure composite, the backplate body includes abrasion -resistant fire -retardant surface layer, perforated sound-absorbing layer, soundproof layer, damping layer and support backplate that are sequentially arranged, each layer is integrally formed by hot pressing, the abrasion -resistant fire -retardant surface layer is located outermost layer.The utility model can effectively block external fire source and delay flame spread by abrasion -resistant fire -retardant surface layer, perforated sound-absorbing layer and soundproof layer can efficiently absorb medium-high frequency noise by micro-perforation resonance and porous sound-absorbing, and damping layer further inhibits structural vibration energy transmission, solve the problem that traditional seat backplate is insufficient in fire -retardant and single in noise absorption means.

The utility model discloses a flexible protective device for treating a collapsed cavity at the top of a tunnel, which comprises at least two flexible protective nets which are arranged from top to bottom and connected to the inner wall of the collapsed cavity, and the aperture of the lower part of each flexible protective net is smaller than that of the upper part of each flexible protective net. The protective net is composed of a steel wire rope protective net body and a twisted-pair hexagonal flexible net body, the steel wire rope protective net body is formed by rhombic weaving of Galfan coating steel wire ropes, and the twisted-pair hexagonal flexible net body is formed by weaving of A-grade Galfan coating steel wires, overlaps the edge of the steel wire rope protective net body by 10-20 cm and is tied. The steel wire rope protective net is formed by splicing meshes of different specifications, splicing follows a specific principle, and steel wire rope buckles are used for connection. The device is further provided with anchor rods, spring hooks and other components, and the number and size of the components are determined according to the three-dimensional data of the collapsed cavity. Compared with a traditional protective net, the device can effectively absorb rockfall energy, is good in buffering effect, high in adaptability to different collapse cavities, easy and convenient to install and capable of reducing construction risks and guaranteeing tunnel construction and operation safety.

The utility model relates to the technical field of speed reducer drive structure, and disclose a gear drive structure for speed reducer, including sun gear, gear ring and buffer shock component, the sun gear middle part is equipped with the taper mounting hole, with the taper mounting head of drive link is connected through buffer shock component, and buffer shock component contains the first installation platform of taper mounting hole inner wall, the second installation platform of taper mounting head outer periphery, the disc spring between both and the rubber sleeve of disc spring outer periphery, the inner periphery of gear ring is engaged with planetary gear, and the planetary gear is engaged with sun gear, and the oil cavity is equipped in the planetary gear, and the oil supply groove of outer periphery annular array, the oil supply groove is equipped with oil storage groove in the tooth surface of second wheel tooth two sides, and the oil supply groove is connected with oil storage groove. The utility model can buffer impact, strengthen engagement lubrication, reduce the wear and tear of wheel tooth, promote transmission stability and efficiency, prolong the service life of speed reducer, and be applicable to the speed reducer of industrial, engineering machinery and other fields.

The utility model relates to a heat dissipation type new energy automobile battery shell, relates to the technical field of battery shells, and aims to solve the problem of poor heat dissipation of a battery shell, the heat dissipation type new energy automobile battery shell comprises a main shell body, the two ends of the main shell body are open, heat dissipation end covers are arranged at the two ends of the main shell body, and any heat dissipation end cover comprises a base and a flow guide outer cover; the base is arranged on the side, close to the main shell, of the flow guide outer cover, the base and the flow guide outer cover are each of a hollow structure and communicate with the interior of the main shell, flow guide through holes are formed in the four side walls of the base in a penetrating mode, and a fan module is arranged in the main shell. And a fan notch for air flow to circulate is formed in the main shell. The battery pack has the effects of effectively absorbing heat generated by the battery and quickly dissipating the heat.

The utility model relates to the technical field of plastic plate processing equipment discloses a multicolor extrusion device for striped effect plastic plate, and the device comprises a shell, a shell body and a cooling and pressing assembly arranged in the shell, further comprises a water removal assembly, the water removal assembly comprises a fixed plate, a sponge, a chute and a sliding block, the chute is fixed on the shell, the sliding block is fixed on the fixed plate, the sponge is installed on the fixed plate and abuts against the surface of the cooling roller, and the sliding block and the chute constitute a sliding detachable connection, the water removal assembly can effectively absorb the condensed water on the surface of the cooling roller, the surface quality of the plastic plate is ensured, the structure makes the whole assembly be quickly disassembled, the maintenance efficiency of cleaning or replacing the sponge is greatly improved, the continuous production stability of the equipment is enhanced, and the utility model has remarkable practical value.

This utility model provides a car bumper with a layered energy-absorbing structure, relating to the field of automotive parts technology. Its features include a fixed bracket, a protective plate fixedly mounted on the front side of the fixed bracket, and connecting ear plates symmetrically arranged on both sides of the fixed bracket. The fixed bracket is a bent bracket, and a groove is provided between the upper part of the fixed bracket and the protective plate. The groove is filled with buffer rubber. A hydraulic damper is fixedly mounted between the connecting ear plates and the protective plate. A license plate frame is fixedly mounted at the middle of the front side of the protective plate. The end of the license plate frame is U-shaped, protruding to the front side of the protective plate, and the width of the front side of the license plate frame is greater than the width of the rear side. This utility model, through the bent structure of the fixed bracket, the buffer rubber in the groove, and the hydraulic damper, forms a multi-stage energy-absorbing system, effectively absorbing collision energy, improving safety, adapting to collision loads at different angles, and improving energy absorption efficiency.

This utility model provides a novel universal power adapter, relating to the field of power adapter technology. It includes a housing assembly comprising an outer shell, an interface end cover, and a socket bottom cover. The socket bottom cover also includes an adapter circuit board mechanism disposed between the outer shell and the inner shell. A heat dissipation assembly comprises a heat dissipation sleeve embedded within the outer shell. A threaded heat-conducting plate is embedded in the heat dissipation sleeve. The threaded heat-conducting plate has a threaded structure, and the heat dissipation sleeve has annularly distributed heat dissipation holes. Heat generated during device operation is transferred to the outer shell and then conducted to the heat dissipation sleeve embedded therein. The threaded structure of the threaded heat-conducting plate increases the contact area with heat, efficiently absorbing heat and rapidly conducting it along the threaded path. The annularly distributed heat dissipation holes on the heat dissipation sleeve allow air to circulate inside and outside the sleeve. Hot air is discharged from the heat dissipation holes, and cool air is introduced, achieving continuous heat dissipation and maintaining a stable internal temperature of the device.

The utility model provides a kind of aluminium foil lunch box with inner lining isolation structure, it includes heat-conducting bearing shell, isolation support pad lining and adapter composite core layer, heat-conducting bearing shell is made of aluminium foil, its edge is bent upwards and is enclosed to form bearing space, and heat conduction is directed to bearing space, isolation support pad lining is made of paper, it is attached to bearing shell inner wall, and support pad space is enclosed in isolation support pad lining inside, adapter composite core layer is made of two-component polyurethane adhesive, it is filled between heat-conducting bearing shell inner wall and isolation support pad lining outer wall, isolation support pad lining and heat-conducting bearing shell are fixedly connected by adapter composite core layer, isolation support pad lining is supported and heat-conducted by heat-conducting bearing shell, food is supported by isolation support pad lining, and it is mutually isolated with heat-conducting bearing shell, avoid harmful substance in heat-conducting bearing shell migration to food.

The application relates to the technical field of building engineering, in particular to a prefabricated reinforced concrete formwork structure for a building frame beam body column, which comprises a formwork platform, a pouring mold, a material guide frame and a material guide bin, and further comprises a supporting plate, the supporting plate is arranged on the formwork platform, and the pouring mold is supported through the supporting plate when the pouring mold is impacted by concrete, the prefabricated reinforced concrete formwork structure for the building frame beam body column has the advantage that the supporting mechanism can follow the falling position of the concrete pouring to synchronously additionally support the position of the pouring mold impacted by the falling concrete, during the concrete pouring process, especially when large-volume concrete or high-fall pouring is carried out, a large impact force is generated, additional support can effectively disperse and absorb the impact force, the direct impact on the main structure is reduced, and thus the main structure is protected from damage, and the local reinforced supporting mode can more effectively disperse and resist the impact load.

The invention discloses a production device of an imitation aluminized mirror surface transfer printing film, and relates to the technical field of transfer printing film production, the production device comprises a support frame and a rolling shaft used for supporting a winding drum, the support frame is provided with two vertical frames arranged at an interval, side plates are arranged between the vertical frames, the rolling shaft is rotatably clamped between the side plates, and the rolling shaft is used for supporting the winding drum. The vertical frame on one side is fixedly connected with a winding motor set, the vertical frame on the other side is fixedly connected with a lead screw sliding rail set, the lead screw sliding rail set is used for lifting the side plate so that the winding motor set can drive the two winding shafts respectively, the side plate comprises an overturning frame, and the position, corresponding to the axis of the winding shafts, of the overturning frame is fixedly connected with a first electromagnet; the middle of the first electromagnet is rotationally connected with a second iron core, the winding shaft comprises a plurality of paper tube supporting plates and a limiting shaft, the paper tube supporting plates are located on the outer side of the limiting shaft, and the outer side of the limiting shaft is fixedly connected with a supporting block. Self-positioning clamping can be carried out on the winding drum and a paper tube, and the installation difficulty of the winding drum is simplified.

The invention discloses a flexible bracket for an angle sensor of a tilting mechanism and an assembly method. The flexible bracket is characterized in that a fixed end bearing seat is fixedly connected with a main shaft; the tilting end bearing seat is fixedly connected with the main shaft and is spaced from the fixed end bearing seat; an inner ring of the bearing is fixedly connected with the fixed end bearing seat, and an outer ring of the bearing is clamped and fixed with the sensor stator bracket through the tilting end bearing seat; the sensor stator bracket is used for fixing an angle sensor stator; the sensor rotor bracket is used for fixing an angle sensor rotor, and the sensor rotor bracket and the sensor stator bracket are coaxially arranged in a relatively rotating manner; the flexible decoupling assembly is arranged between the sensor rotor support and the fixed end bearing seat and is used for generating elastic deformation when the main shaft deforms or vibrates. According to the invention, the fixed end bearing seat, the tilting end bearing seat and the mounting bracket of the angle sensor are integrated into a whole, the structure is simplified, and the reduction of the mounting coaxiality caused by the bending deformation of the main shaft under load can be automatically compensated through the flexible decoupling assembly.

The utility model discloses a kind of washing machine plastic pipe processing cooling device, it is related to cooling device technical field, including water tank, the inner wall of water tank is fixedly installed with two connecting plates, two the similar surface of connecting plate is fixedly installed with two protective plates, two the outer wall of protective plate is opened with through slot, the outer wall of the connecting plate of preceding side is rotatably connected with two rotating shafts, one end of two the rotating shaft is fixedly installed with the block of stirring, the utility model is by being put into from feed pipe, plastic pipe can be entered into protective plate inside by feed pipe, and plastic pipe will be consistent with the gap of the block of stirring, by starting motor, by the output end of motor can drive first pulley to rotate, when motor drives first pulley to rotate, the belt of the outer wall of first pulley is moved, since second pulley outer wall and belt engage, the rotation of belt can drive second pulley to rotate.

The application relates to the photovoltaic power generation technical field and provides a marine photovoltaic floating body connecting structure which comprises a floating body used for floating on the water surface, a mounting piece installed on the floating body and used for mounting photovoltaic panels, a connecting assembly used for connecting two adjacent floating bodies, a traction assembly used for connecting the floating body and the connecting assembly and giving the connecting assembly a force moving towards the corresponding floating body, and a positioning piece arranged on the floating body and used for positioning the connecting assembly, wherein the connecting assembly can be separated from the fixing piece. Through cooperation of the traction assembly and the positioning piece, if the water surface does not have great floating, the traction assembly can pull the connecting assembly into contact with the positioning piece, so that great deviation between the multiple floating bodies does not occur, and the photovoltaic panels can effectively absorb light energy; when the water surface has great floating, the connecting assembly can be separated from the fixing piece, so that damage between the two adjacent photovoltaic panels due to fixed connection does not occur.

The application belongs to the technical field of thermal error compensation, and discloses a non-metal supporting piece numerical control machine tool thermal error compensation method, which comprises the following steps: S1: when the equipment main body is working, the temperature of the equipment main body is monitored in real time through a temperature sensor, and when the temperature reaches a certain threshold value, a pump, a first motor and a second motor are started through an external power supply; S2: the start of the pump enables the cooling liquid to circulate in the cooling cavity and the conveying cavity, and the whole equipment main body is cooled and circulated, so that thermal error compensation is performed; the temperature of the equipment main body is monitored in real time through the temperature sensor, and when the temperature of the equipment main body reaches a certain threshold value, the cooling liquid can be circulated in the cooling cavity and the conveying cavity through the start of the pump, the whole equipment main body is cooled and circulated, and thermal error compensation is performed.

This utility model discloses a Z-shaped friction damping column structure with enhanced seismic performance, comprising a Z-shaped friction damping column body, which includes columns on both sides and Z-shaped crossbars between the columns. The top and bottom of the Z-shaped crossbars between the columns are respectively provided with top friction damping diagonal braces and bottom friction damping crossbars. When an earthquake generates a load on the rack in the direction perpendicular to the aisle, and the axial force caused on the base and the bottom and top diagonal braces exceeds the preset friction force, the damper will begin to slide, absorbing or dissipating some of the seismic energy in the form of friction damping. This reduces the probability of damage to rack structural components and goods slippage under seismic conditions, thereby enhancing the overall seismic performance of the industrial rack.

The utility model discloses a kind of gas tank dry gas desulfurization systems.The system includes: low temperature absorption tower, in which raw material gas tank dry gas and low temperature absorption oil countercurrent contact;Primary amine liquid absorption tower, in which utilize amine liquid to remove hydrogen sulfide in dry gas after organic sulfur is removed;Hydrolysis reactor, in which carbonyl sulfur in primary absorption tail gas is hydrolyzed, and hydrolysis tail gas is obtained;Secondary amine liquid absorption tower, in which utilize lean amine liquid to remove hydrogen sulfide in hydrolysis tail gas, and after absorption, purified dry gas is obtained.The desulfurization system of the utility model can purify and remove organic sulfide and hydrogen sulfide in dry gas, reduce sulfur content in gas, and then reduce SO2 content in flue gas discharged from heating furnace of subsequent each device, ensure that heating furnace of whole plant is safe, environmental protection, high efficiency and stable operation.

The invention relates to the technical field of photovoltaic materials, in particular to an anti-migration black pigment, a high-reflection black packaging adhesive film and a photovoltaic module. The anti-migration black pigment has a structural general formula as shown in a formula I, wherein R1 is at least one of R1, R2, R3, R4, R5, R6 and R7. The anti-migration black pigment disclosed by the invention is blue-phase black, and has excellent damp-heat resistance and migration resistance; when being used for a black packaging adhesive film, the black packaging adhesive film can be well matched with the color of a battery piece without adding other auxiliary pigments for color matching; and in a high-temperature and high-humidity environment, the color difference change value (delta E) of the color of the adhesive film is remarkably reduced, and the requirement that delta E is less than or equal to 2 in long-term use of the photovoltaic adhesive film is completely met.

The present application relates to acoustic equipment technology, and discloses a micro loudspeaker, which comprises a loudspeaker assembly and a sound absorption assembly.The loudspeaker assembly comprises a diaphragm and a paper tube, and the paper tube is provided with a second ball groove at the end thereof.The sound absorption assembly comprises a fixed cavity and an induction unit, and the induction unit is used for increasing the sound absorption coefficient at low frequency and suppressing the sound absorption coefficient at high frequency.At low frequency, the current of the induction coil is increased, the magnetic field intensity of the induction coil is increased, the viscosity of the magneto-rheological fluid is increased, and the sound absorption coefficient is increased.At high frequency, the current of the induction coil is reduced, the magnetic field intensity of the induction coil is reduced, the viscosity of the magneto-rheological fluid is reduced, the sound absorption coefficient is reduced, and the sound absorption requirement of the target frequency band is accurately matched.The present application further discloses a loudspeaker assembly which is composed of one or more micro loudspeakers.

The utility model relates to an engineering machinery spring rolling clamp which comprises a clamp body, the right end of the clamp body is fixedly connected with a fixing plate, an electric push rod is installed at the upper end of the fixing plate, the power output end of the electric push rod is fixedly connected with an upper clamping plate, and the right end of the clamp body is fixedly connected with a lower buffering plate located on the lower side of the upper clamping plate. The lower buffering plate comprises a lower clamping plate fixedly connected with the clamp body, the outer end of the lower clamping plate is sleeved with an outer protection frame, two symmetrical buffering wrapping layers are arranged between the outer protection frame and the lower clamping plate, a threaded hole is formed in the bottom end of the outer protection frame, a threaded rod is connected into the threaded hole in a threaded mode, and the upper end of the threaded rod makes contact with and abuts against the lower clamping plate. And the buffering wrapping layer comprises the first buffering layer and the second buffering layer, the first buffering layer is located on the outer side of the second buffering layer, when the round steel is bent, the lower clamping plate can be protected and cooled, the lower clamping plate is not prone to damage in the long-term use process, and the service life of the lower clamping plate is prolonged.

The invention relates to the field of fluorine chemical processes, in particular to a molybdenum hexafluoride sampling device and method. The device comprises a molybdenum hexafluoride steel cylinder, an inert gas steel cylinder, a buffer bottle, a first-stage absorption bottle, a second-stage absorption bottle and a third-stage absorption bottle, the absorption liquid is filled into the three-stage absorption bottle and is weighed, the pipeline is vacuumized and replaced after the three-stage absorption bottle is connected, the absorption bottle is purged, and the buffer bottle is vacuumized. The method comprises the following steps: heating a molybdenum hexafluoride steel cylinder, filling the molybdenum hexafluoride steel cylinder into a buffer bottle, filling inert gas, introducing the inert gas into an absorption bottle for absorption, purging a pipeline, weighing the absorption bottle, and detecting metal impurities by using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer). According to the method, the problem that metal impurities in high-purity molybdenum hexafluoride are difficult to safely and accurately sample is solved, and a reliable and practical solution is provided for purity quality control of the key material molybdenum hexafluoride in the fields of semiconductors, nuclear industry and the like.

The utility model belongs to the technical field of powder cleaning machine, especially 3D printing's aircraft rudder shaft polishing powder recovery device, including powder cleaning machine body, the bottom of powder cleaning machine body is provided with recovery mechanism, recovery mechanism includes filter screen, the aperture structure of filter screen is filtered to the powder that falls because of gravity, passes through setting dust extraction mechanism, detects the powder concentration in air, support frame and electric push rod fixed mounting, to its fixed, the telescopic of electric push rod can drive dust extraction frame to remove to adjust the relative distance between the rotator device of workpiece and placement, dust extraction frame adopts half ring structure, its inner diameter is slightly greater than the outer diameter of rotator device, ensures that the floating powder that workpiece produces when rotating and vibrating can be effectively absorbed.

The utility model provides an oil-proof needle upper dial of a knitting double-sided circular knitting machine, which relates to the technical field of knitting double-sided circular knitting machines and comprises a circular knitting machine upper dial body, knitting needles are mounted on a needle groove surface at the upper end of the circular knitting machine upper dial body, and an oil discharge groove and an annular groove are respectively arranged on the upper end surface of the circular knitting machine upper dial body. A supporting annular plate is clamped in the annular groove, a vertical partition piece is connected to the inner side of the supporting annular plate in a penetrating mode, a limiting bottom plate is fixed to the lower end of the vertical partition piece, a spring is connected to the lower end of the limiting bottom plate through a connecting block, and an oil absorption ultra-thin pad is supported on the upper end face of the supporting annular plate and the upper end face of the vertical partition piece. An oil-absorbing fiber layer is arranged in the oil-absorbing ultrathin pad, and a first non-woven fabric layer and a second non-woven fabric layer are adhered to the outer side surface of the oil-absorbing fiber layer. The utility model solves the problems in the prior art that redundant oil on the surface of a knitting needle is easy to flow outwards under the action of centrifugal force and is difficult to ensure that the oil flows downwards into the oil collecting groove of the upper needle dial.

This invention discloses a crop growth monitoring device, relating to the field of agricultural equipment. It includes a base plate, connecting rods, a vertical rod, and a light source assembly. The base plate has several sets of detection components evenly distributed on it. The side of the base plate is connected to the bottom of the vertical rod via connecting rods. The top of the vertical rod is equipped with a light source assembly that emits stable light. A horizontal movement assembly is located on one side of the base plate where the connecting rods are located. A vertical movement assembly is located on the horizontal movement assembly, and a photoresistor element is located on the vertical movement assembly. A linkage block is located at the bottom of the photoresistor element. When the linkage block moves directly above any set of detection components, it can activate the detection components to extend into the soil for detection. This invention can measure the moisture and fertility of the soil around the crop while simultaneously measuring the crop plant height, thereby indirectly obtaining information about the crop's root system and saving labor in crop data collection.