127results about How to "Avoid direct impact" patented technology

Belonging to the field of petrochemical engineering, the invention discloses a catalytic slurry oil purification device, which comprises a tank body, and a feed end and a discharge end respectively arranged at two ends of the tank body. An upper partition plate and a lower partition plate are fixedly connected to the inner wall of the tank body, a discharging opening is formed in the upper partition plate, and a feeding opening is formed in the lower partition plate; the interior of the tank body is divided into three independent cavities by the upper partition plate and the lower partition plate; according to the scheme, the filter element is sleeved with the hollow cylinder, and the rotatable first spiral flow deflector is further arranged between the inner wall of the hollow cylinder and the outer wall of the filter element; a rotatable first spiral flow deflector is further arranged between the inner wall of the hollow cylinder and the outer wall of the filter element; a shear force generated by rotation of the first spiral flow deflector can prevent a filter cake on the surface of the filter element from forming a compact thick layer; a filter cake layer can be controlled within a relatively thin thickness range, and the rising speed of the pressure difference is delayed, so that the operation duration of a single filtering period is prolonged; and the single-time continuous treatment capacity of the device is greatly improved.

The invention discloses a fruit conveying anti-blocking mechanism based on a neural network and a control method. The mechanism comprises a conveying channel, a disturbance disc connected with a motor through a universal joint, a touch sensing array and a gravity self-adaptive floating assembly. According to the mechanism, pressure data of a tactile sensing array on the surface of a disturbance disc are collected through Jetson, and the blockage state is judged in real time through a full-connection neural network; when blockage occurs, the Jetson directly controls the servo motor to change speed, the alternating inertia moment is matched with the gravity of fruits to overcome the resistance of the spring, and the disturbance disc is forced to passively incline around the center of the universal joint, so that the blockage is relieved. By means of the mode of combining motor rotating speed control and mechanical passive inclination, blockage caused by fruit accumulation is effectively damaged, and fruit damage is reduced while rapid dredging is achieved.

The present application relates to the technical field of tobacco processing, in particular to a pneumatic conveying device and method for improving the conveying efficiency of tobacco material, the pneumatic conveying device comprising a feeding pipe, a material conveying pipe and an adjustable air pipe, which are arranged in a T-shaped layout and are interconnected, wherein the feeding pipe is perpendicular to the material conveying pipe and the adjustable air pipe; a wind volume adjusting plate assembly and a constant speed spiral air hole plate are sequentially arranged from outside to inside at the inlet of the adjustable air pipe; the wind volume adjusting plate assembly is used for controlling the wind volume entering the adjustable air pipe; the constant speed spiral air hole plate is a circular plate, the outer diameter of which matches the inner diameter of the adjustable air pipe, a plurality of through holes are formed in the circular plate, the plurality of through holes are arranged in a constant speed spiral layout, and each through hole has a consistent inclination angle between the axis of the through hole and the tangent of the center of the circular plate. The present application can significantly improve the conveying smoothness of tobacco material, and can also reduce the crushing rate of tobacco sheets and other fragile materials.

The utility model discloses a photovoltaic cell EL defect sorter, and relates to the technical field of sorters. Comprising a sorter main body, the sorter main body is provided with a photovoltaic cell EL defect detection mechanism, the detection mechanism comprises a moving assembly, the moving assembly comprises an opening groove formed in the top end of the sorter main body, a positioning rod is fixed to the inner wall of the opening groove, and a sliding rail support is slidably connected to the outer wall of the positioning rod; after the camera lens is detected, the protective shell is screwed on the bolt rod on the outer side of the camera lens, the camera lens is protected through the protective shell, external physical collision and scraping can be effectively resisted, tools, parts and other hard objects are prevented from directly impacting the lens under the daily operation, maintenance or unexpected conditions of equipment, and the camera lens is protected. The surface of the lens is prevented from being scratched and damaged, the optical structure integrity of the lens is protected, the definition and accuracy of a detection image are guaranteed, and pollution of impurities and dust is prevented.

The application discloses an orchard air-blast soil loosening machine, comprising a high-pressure air-blast system, which is connected with a gas storage assembly through a pipeline; the gas storage assembly comprises a gas storage tank, a soil loosening rod and an air-blast drill bit; the air-blast drill bit is centrally controlled, and a pre-splitting structure is arranged on the side wall of the end connected with the soil loosening rod; the pre-splitting metal sheet is made of elastic metal material, is arranged in a semispherical shape, and a plurality of pre-splitting micro-slits are arranged on the side wall. The orchard air-blast soil loosening machine realizes accurate protection of root systems through multi-stage structure design. The pre-splitting metal sheet is made of elastic metal material, can be unfolded from a semispherical shape under the action of high-pressure gas, and the pre-splitting micro-slits increase to form a buffer blasting area; through experimental verification, the direct damage rate of root systems can be reduced by more than 60%. The main air-blast hole is arranged obliquely, and the gas impact force can be guided to the deep soil layer in cooperation with the drill bit cone angle of 30-45 DEG, so that direct impact on the shallow absorbing roots is avoided; compared with the traditional straight-hole air-blast mode, the root system survival rate is increased to 92%.

The utility model discloses a kind of steel pipe pile supporting structures, mainly include side slope, concrete layer, two pipe pile row groups and protective layer, the water surface of side slope and backwater surface are supported and reinforced by pipe pile row group, and prevent direct impact of water flow, simultaneously, by protective structure and concrete layer on the bottom and both sides waist surface of side slope are covered and protected, further improve the stability of side slope structure, and prevent soil layer from being impacted by water flow, thereby the overall of supporting structure is relatively stable, not easy to be affected by water flow, and the laying equipment of steel pipe pile is relatively mature, operation is relatively simple, without more artificial simultaneously, to improve the efficiency of construction.

This invention relates to the field of aircraft assembly technology and discloses an aircraft assembly lift, including a fixing assembly. The fixing assembly houses a first lifting assembly, and the first lifting assembly houses a fifth lifting assembly. The bottom of the fifth lifting assembly has a supporting foot, the top of which is fixedly installed to the bottom of the fixing assembly. The fixing assembly includes a fixed outer cylinder, an electrical unit fixedly connected to the outer side of the fixed outer cylinder, a support fixedly installed at the bottom of the fixed outer cylinder, a first cover fixedly connected to the outer side of the support, the outer side of the first cover fixedly installed to the outer side of the fixed outer cylinder, and a first gasket fixedly connected to the outer side of the support. This aircraft assembly lift uses four high-strength linear guides for its slide rails. When the lift is raised, it facilitates lateral drilling. When the lift is close to the aircraft fuselage or work frame, the handle can be rotated to tighten the screws and connect to the side interface.

This utility model discloses a hot and cold stratified oil tank system with carbon recovery and multi-stage filtration functions, relating to the field of machine tool oil cooling technology. It includes an oil tank body; the oil tank body has a hot oil chamber and a cold oil chamber; the oil tank body is provided with a hot oil inlet, a hot oil outlet, a cold oil inlet, and a cold oil outlet; the hot oil inlet and hot oil outlet are opposite each other and both communicate with the hot oil chamber; the cold oil inlet and cold oil outlet are opposite each other and both communicate with the cold oil chamber; a settling tank is provided at the bottom of the hot oil chamber, and the settling tank can be removed from the hot oil chamber; a hot oil filter chamber is provided inside the hot oil chamber, located above the settling tank, and a hot oil filter assembly for filtering the flowing hot oil is provided inside the hot oil filter chamber; a transition chamber is provided at one end of the hot oil filter chamber near the hot oil inlet, the transition chamber communicating with the hot oil filter chamber and the settling tank. This system enables internal cleaning of the oil tank and reduces waste.

The utility model relates to the technical field of new energy batteries, and discloses a single battery and a battery pack, the single battery comprises: a housing having an accommodating cavity; the electrode assembly is arranged in the accommodating cavity; the cover plate comprises a top cover piece and lower plastic, and the top cover piece is provided with a liquid injection hole; the lower plastic comprises a body and an abutting table, the abutting table comprises a side plate and a bottom plate connected with the side plate, the body is fixedly connected with the side plate, the bottom plate abuts against the electrode assembly in the first direction, a slow flow cavity is defined by the side plate, the bottom plate and the top cover piece, the slow flow cavity is communicated with the liquid injection hole, the liquid injection hole and the bottom plate are oppositely arranged in the first direction, and the side plate is further provided with an opening. The opening communicates with the slow flow cavity and the containing cavity. When the electrolyte is injected, the electrolyte impacts the bottom plate in the first direction, slows down in the slow flow cavity and then enters the containing cavity through the opening, and the electrolyte is prevented from directly impacting the electrode assembly; the bottom plate abuts against the electrode assembly in the first direction, enough electrolyte buffer space can be guaranteed, and the phenomenon of liquid overflow is avoided.

The invention discloses a gas-liquid cylinder which comprises a cylinder body, a piston is arranged in the cylinder body, a piston rod with the end extending out of the cylinder body is connected to the piston, a gas chamber and an oil chamber are correspondingly formed in the two sides of the piston in the cylinder body respectively, a gas channel communicated with the gas chamber is formed in the cylinder body, and the oil chamber is communicated with the gas channel. The cylinder body is further provided with an independent oil inlet and an independent oil outlet which are communicated with the oil chamber, and a switch valve is arranged at the oil outlet. When the piston rod extends outwards, the switching valve is closed to close the oil outlet, hydraulic oil is input into the oil chamber from the oil inlet, and gas in the gas chamber is compressed to form pre-pressure; and when the piston rod resets, the switching valve is opened to open the oil outlet, and the hydraulic oil in the oil chamber is discharged from the oil outlet. The reset mechanism has the advantages of being reasonable in structure and high in reset speed.

The utility model relates to a thermocouple field discloses a kind of wear-resistant thermocouples, including junction box, the inside fixed mounting of junction box has hot electrode, the outer wall of hot electrode is equipped with insulating sleeve, the bottom of junction box is connected with the protective sleeve being provided, and hot electrode is inside the protective sleeve, the outer wall bottom of the protective sleeve is provided with flow guide mechanism, the flow guide mechanism includes outer thread, and the outer thread is fixedly connected in the outer wall bottom sleeve of protective sleeve.In the utility model, excellent wear resistance is realized by flow guide mechanism, the flared structure of flow guide cover can increase medium contact area, reduce high-speed medium in pipeline to low speed, greatly reduce abrasive impact force, while inner wall guide medium flows along cover body outside, avoiding hot electrode measuring end;Two sides flow guide plate and the connecting rod of bottom, front and back side form protective frame, further isolate abrasive impact, effectively avoid protective sleeve rapid wear, significantly prolong the service life of thermocouple.

The application discloses a kind of nanometer pool stirring device, belong to stirring device technical field, to solve the existing adoption high-power mixer is stirred, there can be more security risks and power output energy waste, and aeration balance is not utilized, easy to cause energy waste, while the range of stirring is limited, often easy to appear the problem of stirring dead zone, invention includes nanometer pool main body and the liquid guide pipe connected in nanometer pool main body side, the inside of nanometer pool main body is fixed with support frame, the application can utilize the aeration of external surplus, can be simultaneously aerated from the aeration device and flow guide cylinder of multiple groups and lead out, form spiral rising water flow, further utilize the spiral rising water flow generated, can realize the effect of stirring, while spiral rising flow field, can reduce the dead zone of stirring, so that stirring is more uniform, to replace original power stirring equipment, to reduce the energy consumption and unsafe problem generated by power equipment stirring.

This utility model provides a front wheel dam and a vehicle, belonging to the field of automotive parts technology. It includes a dam positioned in front of the vehicle's front wheel, with a guide vane at its bottom edge. The bottom end of the guide vane is inclined towards the front wheel, and a vertically positioned flap is located at the bottom of the guide vane. This utility model can guide airflow, preventing it from directly impacting the wheels, while also reducing the drag of the dam itself, thus helping to reduce the vehicle's drag coefficient.

This utility model relates to the field of wet wipe production technology, and provides an automatic unwinding machine for wet wipe production, solving the problem of excessive time spent on changing rolls in existing wet wipe production equipment. This utility model includes: a frame; a rotating frame rotatably mounted on the frame, the rotating frame having at least two unwinding stations for mounting material rolls; a drive device connected to the rotating frame for driving its rotation to switch working stations; and a splicing component disposed on the frame and located downstream of the rotating frame for connecting the end of a depleted material roll to the beginning of a new material roll. Through the rotating frame with at least two unwinding stations, production unwinding can be carried out at one station while preparation for loading a new material roll is performed at another station, greatly reducing the time spent on changing rolls in traditional wet wipe unwinding equipment.

The utility model relates to the technical field of bank protection sheet piles, in particular to a channel bank protection sheet pile structure which comprises a first sheet pile which is sequentially arranged and connected, the first sheet pile comprises a top plate, two inclined side plates and two bottom plates, the two inclined side plates are symmetrically connected to the two ends of the top plate, and the two bottom plates are connected to the tail ends of the two inclined side plates respectively and are symmetrical to each other. A first groove is formed between the two inclined side plates, the two bottom plates are parallel to the top plate, a second groove is formed between every two adjacent first sheet piles, first connecting pieces are arranged on the sides, facing the second grooves, of the inclined side plates, and second connecting pieces are arranged on the two sides of each second sheet pile. The second sheet piles are connected with the second connecting pieces located on the two sides of the second grooves through the second connecting pieces so that the second sheet piles can correspondingly shield the second grooves. And the second sheet piles bear direct impact of water waves instead of the second grooves, and thrust borne by the first sheet piles is reduced, so that the relative movement trend between the first sheet piles is reduced, the connection firmness between the first sheet piles is improved, and the service life is prolonged.

The utility model discloses a high-energy pipeline anti-throwing part, and relates to the technical field of high-energy pipeline protection devices. A plurality of steel wires are rotated and crossed based on a preset angle to form a U-shaped steel cable with the cross section being a spiral strand steel wire rope, the steel cable type U-shaped anti-throwing piece with high tensile strength and rigidity is obtained, and a buffering energy absorption layer is arranged on the periphery of the steel cable type U-shaped anti-throwing piece, so that when the high-energy pipeline anti-throwing piece is thrown and impacted by a high-energy pipeline, the high-energy pipeline is prevented from being thrown. According to the high-energy pipeline anti-throwing piece, the buffering energy absorption layer is used for absorbing throwing energy of the high-energy pipeline, the steel cable type U-shaped anti-throwing piece is prevented from being directly impacted, the impact strength borne by the steel cable type U-shaped anti-throwing piece is reduced, the tensile strength of the high-energy pipeline anti-throwing piece is improved, and therefore the protection effect on the high-energy pipeline is improved.

The utility model relates to the technical field of casting, in particular to a pouring device of a precision casting stainless steel flow meter tube, which comprises a placing plate, a sand mold is placed on the placing plate, a pouring port is arranged on the sand mold, a vertical rod is fixedly connected onto the placing plate, a connecting seat is fixedly connected onto the vertical rod, and the connecting seat is fixedly connected with the sand mold. A first connecting shaft is fixedly connected to the connecting seat, a first connecting rod is rotatably connected to the first connecting shaft, a second connecting shaft is rotatably connected to the first connecting rod, a second connecting rod is fixedly connected to the second connecting shaft, and a funnel is fixedly connected to one end of the second connecting rod; a fixing structure is arranged on the first connecting rod; by means of the structure, molten metal can be guided to the sprue gate in a centralized mode, the molten metal can flow into a sand mold cavity more smoothly and accurately, waste of the molten metal is avoided, meanwhile, scouring and damage to a sand mold can be reduced, and therefore the success rate of pouring is effectively increased.

The invention relates to the field of sludge treatment, in particular to a negative pressure sludge discharger device which comprises a bottom plate, semicircular covers, a filter pressing mechanism, a discharging mechanism, a cutting mechanism, an overflow mechanism, a hydraulic pump and a conveying belt mechanism, the semicircular covers are symmetrically arranged at the top of the bottom plate, the two semicircular covers are connected through a hinge, and one semicircular cover is connected with the bottom plate and the filter pressing mechanism. Cascade precipitation and automatic scraping cleaning of fine particles in filtrate are achieved through the V-shaped grooves in the overflow plate, anti-blocking is conducted on the filter cloth through negative pressure formed by rapid rising of the filter pressing block, and when mud cakes are discharged, sealing and leakage prevention are achieved through the leakage-proof plate, and even discharging is achieved through the inclined face of the cutting plate and the cutting groove. Therefore, the technical problems of sealing failure and frequent maintenance caused by easy blockage of filter cloth, easy blockage of a filter screen and residual discharged materials of the existing equipment are effectively solved, and the operation continuity and the dehydration efficiency of the device are improved.

The utility model relates to the technical field of intelligent transportation, concretely relates to high -speed toll station vice node railing machine, including railing machine body, set up on railing machine body and show module of fee of snapshot module and, snapshot module and show module of fee set up in the one side of railing machine body front end facing the lane transaction area, be provided with communication module in the railing machine body, this communication module is used for with ETC lane antenna carries out data interaction, and the transaction data of lane antenna is received through communication module and is shown through show module of fee of railing machine body, the lower extreme of pole machine body is provided with base, and the fixed part of base and setting in the bottom of railing machine body is connected in sliding fit, and the bottom of base is the sliding fit connection of sliding slot and sliding rail, the utility model relates to a kind of high -speed toll station vice node railing machine, solve the problem that multiple stand, construction complex caused by traditional ETC lane snapshot and fee show device independent setting, railing machine is simultaneously realized convenient installation and position adjustment by sliding base.

The invention discloses a WS2 / W composite material, a preparation method thereof and application of the WS2 / W composite material in a sodium-sulfur battery. The preparation method comprises the following steps: uniformly stirring isopropanol and acetone to obtain a mixed solution A; weighing tungsten hexachloride, adding the tungsten hexachloride into the mixed solution A, and uniformly stirring to obtain a mixed solution B; transferring into a reaction kettle, sealing and putting into a drying oven for reaction; after the reaction is finished, carrying out suction filtration and washing on a product by using industrial alcohol, and drying in a vacuum oven to obtain W18O49 powder; the method comprises the following steps: weighing W18O49 powder and sublimed sulfur, respectively and correspondingly placing the W18O49 powder and sublimed sulfur in a first porcelain boat and a second porcelain boat, then placing the second porcelain boat in the first porcelain boat, placing the second porcelain boat in a tubular furnace, introducing argon into a furnace chamber of the tubular furnace, after the pressure of the furnace chamber is increased to 0.2-0.3 MPa, keeping the airtightness of the system, heating to 1100-1300 DEG C at the rate of 20 DEG C / min, keeping the pressure at 0.2-0.3 MPa in the heating process, and keeping the temperature for 2-3 hours; and after the temperature reaches 1100-1300 DEG C, continuously preserving heat for 2 hours, introducing argon, cooling to room temperature, and collecting to obtain WS2 / W powder. The problems of poor conductivity of the sulfur positive electrode, polysulfide shuttle effect and slow reaction kinetics are solved.

The utility model provides a kind of for coke oven tail gas combustion device, belongs to tail gas combustion technical field, comprising: combustion chamber, raw gas import, combustion air import, ignition needle, explosion door, first baffle and smoke outlet;Combustion chamber includes inner shell and outer shell, combustion air passage is equipped between inner shell and outer shell, inner shell is equipped with multiple air holes, inner shell is connected with raw gas import, combustion air passage is connected with combustion air import;Ignition needle is embedded in inner shell inside one end, and ignition needle is located above raw gas import;Explosion door is rotatably connected with combustion chamber, and covers in the opening of combustion chamber;The device passes through raw gas first by ignition needle and is ignited to occur first combustion, then fully mixes with combustion air in combustion chamber interior and occurs secondary combustion, to improve combustion efficiency, and after the gas after combustion is guided and shunted, then is discharged through smoke outlet, avoid airflow direct impact smoke outlet, reduce the risk of turbulence generation and smoke outlet blockage.

This utility model relates to the field of metal surface treatment and discloses an anodizing tank with a protective structure, including a tank body. A mounting bracket is fixedly connected to the inner wall of the top of the tank body, and a base plate is fixedly connected to the inner wall of the bottom of the tank body. Support feet are fixedly connected to the four corners of the lower surface of the base plate. A protective component is provided at the left end of the tank body, and a sealing component is provided inside the tank body. The protective component includes a suction pump, which is located on the left surface of the tank body, and a connecting pipe is fixedly connected through and to the left surface of the tank body. In this utility model, under the action of the protective component, real-time filtration and impurity removal of the electrolyte can be achieved. The filter plate can effectively intercept impurities such as metal debris. Combined with the suction pump and the inclined base plate, electrolyte circulation is promoted, reducing the impact of impurities on the oxide film. Furthermore, the positioning component facilitates quick assembly and disassembly of the filter plate, avoiding frequent shutdowns and improving production efficiency.

The utility model relates to the technical field of LED lamps, in particular to an LED lamp with a waterproof function, which comprises a bottom plate, a vertical block, a connecting block, a body, two protection mechanisms and a limiting mechanism, one end of the vertical block is connected with the top of the bottom plate, the other end of the vertical block is connected with the connecting block, the body is arranged at the top of the connecting block, the number of the protection mechanisms is two, and the limiting mechanism is arranged on the bottom plate. The protection mechanism comprises a cylinder, a limiting block and a protection shell, the cylinder penetrates through the vertical block, the outer wall of the cylinder is sleeved with the protection shell, the inner wall of the protection shell makes contact with the connecting block, one end of the limiting block is connected with the vertical block, and the other end of the limiting block makes contact with the inner wall of the protection shell. The limiting mechanism comprises an electromagnet, a long plate, an electric push rod and a clamping block, one end of the electromagnet attracts the vertical block, the other end of the electromagnet is connected with the long plate, and the LED lamp with the waterproof function solves the problem that an existing device is poor in protection effect.

The utility model relates to valve structure technical field especially relates to a control valve, it includes: end cover, main valve block and main valve core etc. Main valve block is fixed on the end cover, forms the hollow channel in the inside of end cover and main valve block, and has the import and export, main valve core is slidably arranged in the hollow channel, and main valve core is hollow structure, and forms and has the multiple sets of throttling portion communicated to the hollow structure inside, and the annular gap is formed between the outer wall of throttling portion and the inner wall of main valve block. The utility model discloses through the multiple sets of throttling portion set up on main valve core, reduces the flow and pressure of fluid, through the annular gap formed between the outer wall of throttling portion and the inner wall of main valve block, avoids high pressure emulsion direct impact main valve core, can store emulsion through the annular gap, thereby further reduced pressure and flow impact, through the combined use of throttling portion and annular gap, can disperse pressure and flow impact, thereby improves the stability and reliability of equipment.

The utility model relates to the field of greenhouse ventilation, in particular to a greenhouse ventilation device. The greenhouse ventilation device comprises a greenhouse body, the greenhouse body is composed of a framework, a plastic film wrapping the framework and a fan fixed to the framework, the greenhouse ventilation device further comprises a plurality of slow flow assemblies, the slow flow assemblies are close to an opening of the greenhouse body, a slow flow chamber is formed by the slow flow assemblies and the opening of the greenhouse body, and each slow flow assembly comprises a rubber curtain. The multiple rubber curtains can seal the slow flow chamber and a channel of a planting area in the greenhouse body. And the winding and unwinding assembly is installed on the framework, the winding and unwinding assembly comprises a winding shaft, the flow slowing assemblies are all installed on the winding shaft, and the rubber curtain is wound and unwound through rotation of the winding shaft. According to the greenhouse ventilation device provided by the utility model, the plurality of rubber curtains are arranged at the position close to the opening of the greenhouse body, so that airflow entering the greenhouse can be buffered, and crops are prevented from being directly influenced.

This utility model discloses a novel LED backlight module that is convenient for transportation, relating to the technical field of backlight module technology. The utility model includes an outer frame, with a baffle connected to the upper part of the inner side of the outer frame. Buckles are connected to both sides of the baffle, and a cushioning pad is connected to the bottom of the baffle. Through the baffle and buckles, this utility model effectively shields the light-shielding film and the bent flexible flat cable, preventing direct contact and friction with other modules during transportation. Simultaneously, the buckles securely fasten the baffle to the top of the outer frame, and the abutment between the baffle and the inner wall of the outer frame around its perimeter comprehensively restricts the vertical and horizontal displacement of the baffle, ensuring the stability of the protective structure and reducing the risk of damage to the light-shielding film and flexible flat cable. This facilitates the protection of the light-shielding film and flexible flat cable during transportation.

This utility model discloses a three-phase grid voltage detection circuit, comprising: a switching module, a control module, three phase voltage sampling modules, and two comparison modules. The phase voltage sampling modules sample the phase voltages of the three-phase AC power of the tested grid and convert them into DC voltages. The comparison modules output a first-level signal through their comparison output terminals when the DC voltage is greater than a first voltage, and output a second-level signal through their comparison output terminals when the DC voltage is less than the first voltage. The switching modules turn off in response to the first-level signal to input the DC voltage to the control module, and turn on in response to the second-level signal to input the ground voltage to the control module. The control modules determine whether the three-phase AC power of the tested grid is under-voltage or over-voltage based on the DC voltage, and determine whether a phase is missing in the three-phase AC power of the tested grid based on the ground voltage. This utility model's three-phase grid voltage detection circuit has a simple structure and low cost.

The utility model discloses an intelligent power load prediction device, which relates to the technical field of power load prediction devices, and comprises a shell used for supporting and protecting parts required for forming the power load prediction device; the heat insulation plate is located on one side of the interior of the shell and detachably connected with the shell; the cooling fan is located on one side of the heat insulation plate and located in the shell; the heat dissipation assembly is located on the other side of the heat insulation plate and located in the shell. In the process that the cooling fans operate in the storage cavity, suction force is directly generated to the interiors of the concentration pipe and the heat conduction pipe, the suction force can increase heat in the shell and on the right side of the heat insulation plate, the heat is guided out through the heat conduction holes more quickly and guided into the storage cavity, only one set of cooling fans are located in the storage cavity, and the heat dissipation efficiency is improved. The heat insulation plate is used for heat insulation treatment, direct influence of heat in the storage cavity on components on the right side of the heat insulation plate is avoided, and damage of the heat to the components is reduced.