65results about How to "Improve contact effect" patented technology

The utility model relates to the technical field of coating ovens, in particular to a drying device of a coating oven. Comprising a drying oven, a coating material arranged in the drying oven in a penetrating mode, a hot air generation and circulation device installed at the top in the drying oven, a plurality of baffles installed below the hot air generation and circulation device and used for partition heat insulation, and a hot air drying mechanism installed below the hot air generation and circulation device and used for heat source circulation. According to the coating oven drying device, through the design of the multiple sets of air guide assemblies distributed at equal intervals and the combination of a hot air output and recovery circulating system, the hot air utilization efficiency and drying uniformity are remarkably improved, the angle of an air outlet of each air guide assembly is adjustable, and the drying efficiency is improved. The drying requirements of different coating materials can be flexibly met, and the contact effect of hot air and the surfaces of the materials is optimized; due to the gradient temperature control design (separated by baffles) of the three-stage drying area, fine regulation and control of the drying process are achieved, and deformation or quality defects caused by sudden temperature change of materials are avoided.

This invention provides a method for etching contact holes in gallium nitride (GaN) devices. The method includes providing a substrate on which a GaN epitaxial layer and a barrier layer are formed. An interlayer dielectric layer covering the barrier layer is formed on the substrate. A photoresist layer is formed on the interlayer dielectric layer. The photoresist layer is photolithographically opened to expose a portion of the interlayer dielectric layer, defining the contact hole formation area. Inductively coupled plasma etching (ICP-CPE) is used to etch the exposed interlayer dielectric layer to form a groove, such that the thickness of the interlayer dielectric layer at the bottom of the groove is a preset value. High-density plasma etching (HDP-CPE) is used to etch the interlayer dielectric layer at the bottom of the groove, exposing the barrier layer. The groove is then filled with a conductive material. This method yields ohmic contact holes with good morphology and features high selectivity, low damage, and low cost, which is beneficial for ohmic metal filling and improving ohmic contact performance.

A cable truss, including upper chord cable, lower chord cable, cable clamp, cable clamp support arm, cable end connecting block; the two ends of the cable clamp support arm are respectively provided with a cable clamp, the cable clamp is a cylindrical structure as a whole, which is composed of upper spiral body, middle spiral body and lower spiral body, the joint of the upper spiral body and the middle spiral body is provided with an upper chord cable through hole, and the joint of the middle spiral body and the lower spiral body is provided with a lower chord cable through hole; a plurality of telescopic locking pin shafts are arranged in the upper spiral body and the lower spiral body in the vertical direction, the middle spiral body is provided with locking pin shaft insertion holes corresponding to the locking pin shafts, and the locking pin shafts are inserted and matched with the locking pin shaft insertion holes. The application solves the design problem of the cable net node, reduces the adverse effect of the unbalanced force between the cable nets on the overall structure, increases the force rationality of the node and the safety of the whole cable net, reduces the processing and manufacturing cost and the construction difficulty, and can be applied to the "sky round place" structure of the "Dream of Red Mansions" drama fantasy garden engineering.

The utility model discloses a toxic Mongolian medicine material drying device which comprises a drying box, the drying box comprises a box body and a box cover, the box cover is fixedly arranged on the box body through bolts, the toxic Mongolian medicine material drying device further comprises a mounting groove, a drying cylinder, a drying mechanism and a stirring mechanism, the mounting groove is formed in the top side wall of the box body, and the drying cylinder is arranged in the drying box; the two ends of the drying cylinder make contact with the box body and the box cover correspondingly, a mounting plate is fixedly arranged on the side wall of the drying cylinder, extends into the mounting groove and is slidably connected with the side wall of the mounting groove, the drying mechanism is arranged in the drying box and used for drying medicinal materials, and the stirring mechanism is arranged in the drying cylinder and used for stirring the medicinal materials. And sealing rings are fixedly arranged on the top wall and the bottom wall of the drying cylinder correspondingly, the two ends of each sealing ring make contact with the drying box correspondingly, and the toxic Mongolian medicine drying device is used for solving the problem that in the prior art, in the toxic Mongolian medicine drying process, the drying efficiency is easily affected due to uneven drying.

A siliconizing carbon / carbon tool for producing a carbon fiber reinforced ceramic-based cylinder material comprises a siliconizing furnace, a protective cover, an outer cooling cylinder, a motor bearing table, a part to be siliconized, a graphite rod, a cooling cylinder mounting nut, a cooling pipe, a graphite rod butt joint block, a driven chain wheel, a transmission chain, a driving motor, a driving chain wheel and a butt joint screw. The inner siliconizing groove is located in the middle, the silicon powder containing grooves are distributed in the side face of the inner siliconizing groove, the inner siliconizing groove and the silicon powder containing grooves are separated through the partition plate, gaseous silicon seepage holes are formed in the surface of the partition plate, and the gaseous silicon seepage holes, the inner siliconizing groove and the silicon powder containing grooves are communicated with one another. The side face of the siliconizing furnace is provided with two sets of graphite rod installation grooves and four sets of cooling cylinder installation screws, the two sets of graphite rod installation grooves are symmetrically arranged, and the cooling cylinder installation screws are located on the two sides of the graphite rod installation grooves.

The utility model provides a probe assembly, a probe card and a detection system, the probe assembly comprises a probe, the probe comprises a heating part and a conductive layer, and the conductive layer wraps the outer surface of the heating part. When a chip CP test is executed by using the probe assembly, the probe is partially inserted into the metal contact of the chip, and then the heating part receives or generates heat, so that the probe is heated to expand, the contact between the probe and the metal contact is improved, the phenomenon of poor contact is avoided, the contact resistance between the probe and the metal contact is reduced, and the chip CP test efficiency is improved. The test result accuracy is improved.

The utility model relates to a wiring terminal, which comprises a grounding piece and a battery grounding position which are matched with each other, one side of the grounding piece facing the battery grounding position is provided with a convex point, one side of the battery grounding position facing the grounding piece is provided with a concave point, and the concave point and the convex point form a locking structure. Through the optimal design of adding the salient points on the grounding piece, correspondingly arranging the concave points at the grounding position of the battery, adding the embedding grooves in the pole and the like, the purposes of increasing the contact area and optimizing the contact performance are achieved, the wiring terminal is not easy to deform and loosen when being subjected to external force, and the safety performance of the whole vehicle is improved.

This utility model belongs to the field of chemical fiber processing technology, and in particular to a chemical fiber stretching device. This utility model includes an integrated frame, a bottom groove plate connected to the bottom of the integrated frame, and a temperature control roller mounted on the surface of the integrated frame. A pressure roller is attached to the top of the temperature control roller, and a roller support rod is connected to the top of the pressure roller. An adjusting slide is sleeved on the outside of the roller support rod, and a conical spring is installed inside the cavity of the adjusting slide. An assembly bottom block and an assembly top block, connected to the upper and lower parts of the conical spring, are respectively fixed to the top of the roller support rod and the groove top wall of the adjusting slide. This utility model utilizes an adjusting screw and the adjusting slide to achieve synchronous adjustment, thereby adjusting the distance between the bottom pressure roller and the top temperature control roller. Simultaneously, the conical spring connects the adjusting slide and the assembly bottom block. Due to the progressive stiffness of the conical spring, the pressure roller is more sensitive to chemical fibers of different thicknesses, thus improving the contact effect.

The utility model relates to the technical field of hydrogen bromide purification, and discloses an electronic-grade hydrogen bromide purification device which comprises a settling tank, a rotary feeding mechanism is arranged on the settling tank, and a waste gas discharge mechanism is arranged at the top of the settling tank; the rotary feeding mechanism comprises a supporting seat, the supporting seat is fixedly mounted at the top of the settling tank, a fixed pipeline is fixedly mounted on the inner wall of the supporting seat, and a first valve pipe is fixedly connected to the top of the fixed pipeline. Through the overall design of a rotary introduction mechanism, ozone can be introduced from a first valve pipe, the ozone can penetrate through a rotary pipeline to be output from the end of a branch pipeline, meanwhile, through work of a driving motor, the rotary pipeline can be driven to rotate integrally, so that the ozone is rotationally introduced into a stock solution, and meanwhile, a stirring paddle can be driven to rotate; the stirring paddle can stir the stock solution, so that the contact effect of the stock solution and the ozone is further improved, the utilization rate of the ozone is improved, and the consumption of the ozone is reduced.

The utility model relates to the technical field of liquid crystal display screens, in particular to a liquid crystal display screen surface anti-static device which comprises a frame, a display screen body installed in the frame, a first anti-static assembly arranged at one end of the frame, a second anti-static assembly arranged at the other end of the frame, and an anti-static film installed on the outer wall of the display screen body. The first anti-static assembly comprises a metal inserting block, an inserting groove is formed in the bottom face of one side of the first anti-static assembly, a fluororubber layer is fixedly arranged on the outer wall of the metal inserting block, the fluororubber layer and the metal inserting block are matched with the inserting groove in an inserting mode, and a plurality of metal conductive blocks are embedded in one end of the frame. According to the utility model, low-resistance conduction is ensured, rapid plugging of the metal plugging block is facilitated, an aged conductive assembly is convenient to replace, the surface of the anti-static film is made of an anti-static material, static accumulation is reduced, low-resistance conduction of the metal conductive block is matched, dual inhibition of static and dynamic static is realized, and the anti-static effect is good. And the static electricity residual risk in a dynamic friction scene is reduced.

The utility model relates to a solar cell. The above-mentioned solar cell includes the monocrystalline silicon wafer of first doped type and the first intrinsic amorphous silicon layer and the first microcrystalline silicon layer of second doped type of laminated setting on monocrystalline silicon wafer, wherein, the first intrinsic amorphous silicon layer includes first sublayer and second sublayer, and the first sublayer is between the second sublayer and the first microcrystalline silicon layer;Second sublayer contains microcrystal, and the crystallization rate of second sublayer is 1%~5%, and the thickness of second sublayer is 1.3nm~2.5nm, and second sublayer can enhance the contact effect with the first microcrystalline silicon layer, reduce the series resistance of battery, and improve the filling factor and other performance parameters of battery.

The invention discloses battery cell detection equipment for energy storage module production and a detection method thereof, and belongs to the technical field of battery production, the battery cell detection equipment comprises a conveyor belt, a detection mechanism is mounted at the starting end of the conveyor belt, and the detection mechanism comprises a first mounting box and a second mounting box which are mounted at the front and rear parts of the starting end of the conveyor belt respectively; a lead screw is rotationally installed in the first installation box, a nut sliding block matched with the lead screw is connected to the exterior of the lead screw, a guide rod is fixedly installed in the second installation box, a guide block is slidably connected to the exterior of the guide rod, a supporting rod is jointly connected between the nut sliding block and the top of the guide block, and a transverse plate is slidably installed on the inner side of the supporting rod. A plurality of rotating discs are rotatably installed on the inner side of the transverse plate, a fixing plate is fixedly installed in the middle of the outer portion of each rotating disc, and the upper portion and the lower portion of each fixing plate are connected with testing clamp bodies with conducting strips through electric telescopic rods; the device can be applied to detection of columnar battery cells and square battery cells, and has a better detection effect.

A high-efficiency cold hydrogenation fluidized bed reactor is characterized by comprising a lower head, a cylinder and an upper head; a material inlet is arranged at the bottom of the lower head, and a gas distributor is arranged above the material inlet; a mixture of silicon tetrachloride and hydrogen enters from the material inlet and is uniformly distributed through the gas distributor; a silicon powder inlet, a silicon powder outlet and a plurality of bubble breakers are arranged above the gas distributor. By symmetrically arranging guide vanes, the airflow forms an "eight" symmetrical direction flow in a single grid block and forms a rotating flow between multiple grid blocks; the reverse arrangement of the guide vanes of the upper and lower bubble breakers makes the bubbles form a rotating cutting when passing through the grid block, which can effectively reduce the diameter of the bubbles and prevent the gas from re-agglomerating into bubbles along the vertical direction after breaking; meanwhile, the residence time of the material can be increased, and the turbulent flow degree of the material in the reactor can be increased, so that the flow field in the cold hydrogenation fluidized bed reactor can be improved, and the conversion efficiency of trichlorosilane can be improved.

The application discloses a kind of double locking structure cable joint, including connecting body, the upper end of the connecting body is equipped with compression nut, lower end is equipped with joint body, the compression nut and joint body are all with connecting body screw thread cooperation, the connecting body is equipped with nylon compression ring with compression nut piece, the nylon compression ring adopts plastic material, the opening is opened on the nylon compression ring, the gecko tail piece is equipped with in both ends of the opening, the gecko tail piece is equipped with multiple V-shaped mouths, the inner side of the compression nut and joint body is all inclined surface arrangement, and it is matched with the nylon compression ring the upper end of the compression nut is equipped with connecting lug, the connecting lug is equipped with fixed peg, the thread of the fixed peg both ends is oppositely arranged, the adjusting ring is equipped with in both ends of the connecting lug, the fixed peg is matched with adjusting ring, the adjusting ring is equipped with locking peg, the inner side of the adjusting ring is equipped with locking ring, locking ring is matched with locking peg, the equipment is better to cable fastening, improve waterproof effect.

The utility model belongs to the technical field of water meter backflow prevention, and particularly relates to a high-sensitivity backflow-prevention intelligent water meter which comprises a flow cylinder, and a flow box is fixedly connected into the flow cylinder. Water inlet grooves and water outlets are formed in the side wall of the flow box, and the water inlet grooves and the water outlets are distributed in a circumferential array mode; a water stop plate is fixedly connected to the inner side wall of the flow box; water through grooves are formed in the surface of the water stop plate, and the multiple water through grooves are distributed in a circumferential array mode; the top of the flow box is rotationally connected with a fixed rod; the bottom of the fixing rod is fixedly connected with a flow wheel, and the top of the fixing rod is fixedly connected with a gear; a flow meter is arranged at the top of the gear; the flow box and the water-stop sheet are arranged to separate a water body, so that the contact effect of the water body and the flow wheel is optimized, the accuracy of the water meter is improved, and the error between the flow of the water meter and the actual circulation amount is reduced.

The utility model relates to the technical field of seed impurity removal equipment, in particular to a pea screening and impurity removal device which comprises a bin body, a screen drum is fixedly connected in a left cavity of the bin body, an auger is installed in the screen drum, a material rotating bin is arranged at the output end of the right side of the screen drum, a first air closing device is fixedly connected to the bottom of the material rotating bin, and a fan is fixedly connected to a baffle. An air outlet is formed in the right side cavity, a second discharging opening and a third discharging opening are formed in the lower portion of the right side cavity, a second air-lock valve is fixedly connected to the lower portion of the second discharging opening, a third air-lock valve is fixedly connected to the lower portion of the third discharging opening, and a material distributing cone is fixedly connected between the feeding end of the second discharging opening and the feeding end of the third discharging opening; according to the screening and impurity removing device, small-size impurities such as laterally-crushed seed pods and thick crushed skin particles at the wrinkles of the seed pods are screened out in advance through the screening drum with the auger, light impurities such as crushed pods and crushed stems and leaves are screened out through winnowing, and the process is simplified while the screening and impurity removing effect is guaranteed.

This application relates to a cathode and a method for manufacturing the same. The method includes: reacting a cation containing a cathode element with a precipitant in a solution to obtain a colloidal precipitate; and coating the colloidal precipitate onto the surface of a cathode substrate for cathode manufacturing. Compared to conventional processes, this method eliminates the step of high-temperature calcination of the aluminate active material, simplifying the process. This manufacturing process, utilizing co-precipitation reaction and the characteristics of the colloidal precipitate, is expected to achieve more uniform mixing of the active material, improve the contact performance between the material and the electrode substrate, reduce the shedding of the active material during high vacuum and high temperature processes, reduce impurities, and avoid problems such as reduced conductivity and residual impurities that may arise from the use of binders, thereby extending the service life of electronic devices.

This utility model relates to the field of traffic sign technology, and more particularly to a traffic sign painting device, comprising a processing platform, a first motor disposed at the bottom of the processing platform, and a first cylinder disposed at the end of the processing platform away from the first motor. Through the arrangement of grinding blades and a compaction rod, when the sign needs to be polished, it is simply placed face down on the grinding blades. Multiple grinding blades, driven by the first motor, improve the aesthetics of the sign surface. Simultaneously, the grinding blades remove the adhesive layer from the sign surface, reducing unevenness. Furthermore, during polishing, the compaction rod increases the contact effect between the sign and the grinding blades, thereby enhancing the polishing effect and improving the adhesion of the subsequent paint spraying, thus increasing the visibility of the painted surface.

The utility model belongs to the field of waste gas treatment equipment, and particularly relates to an efficient catalytic combustion waste gas treatment device which comprises a catalytic combustion chamber, a gas inlet pipe is mounted on one side of the catalytic combustion chamber, a gas outlet pipe is mounted on the other side of the catalytic combustion chamber, and a heater is mounted on the inner wall of the bottom of the catalytic combustion chamber. Two supporting seats are mounted on the inner walls of the front side and the rear side of the catalytic combustion chamber, a frame plate is placed at the tops of the two supporting seats, a catalyst is mounted in the frame plate, a plurality of through holes are formed in the catalyst at equal intervals, a partition plate is fixedly mounted in the catalytic combustion chamber, and a plurality of guide holes are formed in the partition plate at equal intervals; and the same lifting plate is slidably mounted on the inner walls of the two sides of the catalytic combustion chamber. The device is reasonable in design, the through hole of the catalyst can be dredged under the non-stop action through the movement of the insertion rod, the blockage of the through hole is avoided, and the purpose of conveniently disassembling, assembling and replacing the catalyst is achieved.

The utility model relates to ecological restoration device technical field especially, more particularly to a kind of adjustable seed reseeding device of grassland ecological restoration.The utility model provides a kind of adjustable seed reseeding device of grassland ecological restoration, including support frame, non-slip wheel, motor, fixed block and fixed column, multiple non-slip wheels are rotatably connected in the rectangular array in support frame bottom, motor is fixedly connected in support frame right side, fixed block is fixedly connected in support frame left side, the output shaft end of fixed block and motor is rotatably connected, fixed column is fixedly connected in support frame left side.The utility model is through the clamping cooperation structure of limiting rod and fixed block, is combined with guide rod and knob locking mechanism, so that seed box can be conveniently installed on motor output shaft, and its position can be adjusted by knob, to realize the flexible adjustment of sowing row distance, improve the stability and operation convenience of overall structure, reduce manual intervention and operating cost.

The utility model relates to the technical field of chemical raw materials, and discloses a chemical raw material rinsing device for chemical production, which comprises a support table, a rinsing box fixedly mounted at the upper part of the support table, a box cover mounted at the upper part of the rinsing box, and a connecting assembly arranged at the upper part of the support table, the connecting assembly comprises a stirring mechanism arranged on the upper portion of the supporting table, an auxiliary mechanism is arranged on the upper portion of the supporting table, the bottom of the rinsing box communicates with a discharging pipe and a water outlet pipe, valves are arranged at the lower ends of the discharging pipe and the water outlet pipe, and meanwhile a filter screen cover is fixedly connected to the inner wall of the top end of the water outlet pipe. And the first conical teeth are engaged with the second conical teeth, the first rotating shaft is rotationally connected with the crushing box through a bearing, and the crushing roller is located in the crushing box. The chemical raw material crushing device solves the problems that an existing device cannot crush chemical raw materials, large blocky raw materials easily sink to the bottom due to gravity, and the rinsing effect of the raw materials is affected.

The utility model discloses an internal adjustable liquid storage bin of a colloid storage battery, and relates to the technical field of storage batteries, in particular to the internal adjustable liquid storage bin of the colloid storage battery, which comprises an outer shell and a top shell, and the top shell is fixedly arranged above the outer shell; the confluence hole is formed between the liquid storage cavity and the electrolysis cavity, and the flow of the electrolyte is accurately controlled by utilizing the adjusting assembly, so that the electrolyte can be more uniformly distributed around the polar plate assembly, and full contact and large-area contact between the electrolyte and the polar plate assembly are realized; the chemical reaction efficiency between the electrolyte and the polar plate is improved, and the optimal contact effect can be achieved under various conditions. According to the utility model, the problem of poor contact effect of electrolyte and the polar plate in the prior art is effectively solved, the charge-discharge efficiency and the overall performance of the storage battery are remarkably improved, the service life of the storage battery is prolonged, and the adaptability and the stability of the storage battery under different working conditions are enhanced.

The utility model relates to the technical field of motors, and discloses a telescopic multi-contact motor grounding ring, which comprises a grounding ring body mounted on a motor casing and a motor shaft, the grounding ring body comprises a mounting ring and a conducting ring, the conducting ring is positioned on the inner side of the mounting ring and is fixedly connected with the mounting ring, the mounting ring is connected with the motor casing, and the motor casing is connected with the motor shaft. A plurality of telescopic holes are formed in the inner side of the conducting ring, telescopic contact pieces are connected into the telescopic holes, and the telescopic contact pieces are connected with a motor shaft. According to the telescopic multi-contact motor grounding ring, the conductive ring and the motor shaft are in movable contact through the telescopic contact piece installed on the inner side of the conductive ring, so that too strong friction force on the motor shaft is avoided, rotation of the motor shaft is prevented from being hindered, and the contact effect of the conductive ring and the motor shaft is improved.

The utility model discloses a gas purification and compression storage tank, which belongs to the technical field of gas purification and comprises a storage tank body and filler arranged in the storage tank body, and the upper portion of the storage tank body is communicated with a feeding pipe. A rotating shell and a dislocation plate in the rotating shell are arranged below a feeding pipe, so that a worker can conveniently debug the speed of gas entering the storage tank body, gas with different properties can be in full contact with filler in the storage tank body, and the purification effect is improved; meanwhile, the gas can enter the storage tank body to be uniformly distributed by utilizing the rotating shell with the semicircular gas outlet end and the angle of the gas outlet hole gradually increased from inside to outside, so that the contact effect of the gas and the filler is improved; by arranging the outer cover and the rotating shell and cooperating with the motor, the rotating shell can rotate and distribute the gas downwards, the diffusion range of the gas can be enlarged, the contact effect of the gas and the filler is improved, and meanwhile the purification quality of the gas can be improved.

The utility model discloses a kind of light hole connectors, it is related to high-frequency connector technical field, including outer conductor, insulating medium and inner conductor, the outer conductor top is equipped with bowl mouth introduction type interface, the inner wall of bowl mouth introduction type interface has the guide chamfer of 30 °-45 °;Annular boss is equipped in the middle part of outer conductor inner wall;The insulating medium is filled between outer conductor and inner conductor by high-temperature sintering, and the lower surface of insulating medium and annular boss upper surface are closely combined;The inner conductor includes coaxially arranged upper portion step column and lower cylinder, and the diameter of upper portion step column is 0.2mm-0.3mm larger than lower cylinder;The outer conductor bottom is equipped with four round pins, and stress release groove is equipped in pin root portion. The design comprehensively solves the key technical problems such as insertion precision, interface reliability and stress distribution, and greatly prolongs the service life of connector.

The invention belongs to the technical field of heating equipment, and provides a semiconductor heater which comprises a heater body, a copper alloy water tank fixedly mounted in the heater body, a water inlet pipeline fixedly mounted at the top of the heater body, and a water outlet pipeline fixedly mounted at the bottom of the heater body. An annular elastic air bag is fixedly mounted on the outer side wall of the water outlet pipeline; when the flow speed of liquid is large, the liquid impacts a plate, the plate rotates on a groove, then a push rod is pressed to slide through a sliding groove, then a push disc slides on a hole channel, gas in the hole channel is extruded, the gas in an annular elastic air bag is increased, and the annular elastic air bag expands; therefore, the contact effect of the annular elastic air bag and the second connecting pipe is enhanced, the sealing effect of the heater is further improved, a gap is prevented from being generated between a pipeline opening and a pipeline, and the safety of the semiconductor heater is improved.

The utility model relates to the technical field of film laminating mechanisms, in particular to a film laminating mechanism of a double-sided film laminating machine, which comprises a mounting frame, hydraulic rods are fixed at the top end and the bottom end of the mounting frame, the bottom output ends of the hydraulic rods are fixedly connected with a crimping plate, a side groove is arranged on the side wall of one end of the mounting frame, and a butt joint groove is arranged on the inner side wall of the mounting frame. Corner connectors are fixed in the butt joint grooves, the four corner connectors are fixedly connected with the middle plate, a film covering assembly is fixed to the bottom of the pressing connection plate, the film covering assembly comprises a film covering frame and a film covering roller fixed in the film covering frame, stretching assemblies are arranged at the top ends of the four corners of the middle plate, and a steering engine can drive a pressing roller to rotate towards the outer side. According to the technical scheme, the film at the top end can be unfolded towards the four corners before making contact with the structure, the film at the top end can be unfolded to a certain size, when the film at the top end makes contact with a material, the contact effect between the film and the material can be improved, and the problems that a worker manually tensions the film, wrinkles the film and influences the film covering effect are solved.

This utility model discloses a sludge pretreatment negative pressure deodorization system, including a sludge tank and a deodorization tower. A cover plate is installed on the upper part of the sludge tank. A variable frequency negative pressure fan is installed at the air inlet end of the deodorization tower, with the air inlet end of the fan extending into the cover plate. Two sets of staggered limiting baffles are installed inside the deodorization tower, positioned between the air inlet and outlet ends. An air outlet pipe is installed at the air outlet end of the deodorization tower. The two sets of limiting baffles form an S-shaped deodorization chamber within the deodorization tower. The beneficial effect of this utility model is that by setting an S-shaped deodorization chamber within the deodorization tower, the residence time of the collected odorous gas within the tower can be effectively extended, allowing the collected odorous gas to fully interact with the sprayed chemical solution, thereby improving the deodorization effect of the chemical solution.

The utility model discloses a device for protecting whitmania pigra from overwintering, which comprises a culture pond, and the upper end of the culture pond is fixedly connected with a U-shaped frame; the heating mechanism comprises a moving plate, the lower end of the moving plate is rotationally connected with a rotating pipe, the lower end of the rotating pipe is sealed, exhaust holes are formed in the two sides of the lower end of the rotating pipe, the right side of the moving plate is fixedly connected with a heating air blowing pump, and the upper end of the rotating pipe penetrates through the moving plate; the exhaust end of the heating air blowing pump is communicated with a rotary joint; the moving mechanism is used for moving the rotating pipe; and the rotating mechanism is used for rotating the rotating pipe. When the device is used, the heating air blowing pump is used in cooperation with the moving mechanism, and heated air is evenly injected into the water body, so that the temperature of the water body is effectively and evenly increased, and the situation that the survival or feeding desire of whitmania pigra is affected due to the too low temperature of the water body in winter is avoided.

The invention relates to the technical field of solar cells, and provides a cell electrode printing method, a back contact cell and a photovoltaic module. The method comprises the steps that a screen printing plate is not changed, an N-type auxiliary grid and a P-type auxiliary grid are firstly printed, a main grid is finally printed, main grid printing is a sequence of overlapping and printing the main grid in three working procedures, and a composite electrode structure is formed on the back face of the battery. According to the invention, the step effect of the auxiliary grid printing can be eliminated and the forming uniformity of the main grid can be optimized through the matching of the printing sequence of the first auxiliary grid and the multi-channel main grid, so that the line width of the auxiliary grid is effectively reduced, the height-width ratio is improved by about 3-5%, the unit consumption of silver paste is saved by about 5-10% under the condition that the design line width of the screen printing plate is not changed, and meanwhile, a foundation is laid for 1-3 mu m lower detection of the design line width of the screen printing plate; and the series resistance and electrode shading loss can be effectively reduced.