53results about How to "Reduce direct contact area" patented technology

The invention discloses an infrared screening automatic separator suitable for a discharging port, and relates to the technical field of material screening, the infrared screening automatic separator comprises a discharging inlet, a vibrating screen plate is connected to the upper end of the discharging inlet in an up-down sliding mode, and a screen hole abnormity detection mechanism is arranged between the vibrating screen plate and the discharging inlet; the screen hole anomaly detection mechanism is used for detecting the indentation degree of screen holes in the surface of the vibrating screen plate, the screen hole anomaly detection mechanism is provided with the movement limiting mechanism, the movement limiting mechanism is used for changing the screen hole detection track, and the real-time monitoring function reduces the screening efficiency reduction or the product quality problem caused by the screen hole problem of the vibrating screen plate; according to the sieve plate, the stability and reliability of the production process are ensured, the problems of the sieve holes can be found in time and repaired, further expansion and deterioration of the problems can be avoided, the complexity and cost of maintenance work are reduced, in addition, through regular monitoring and preventive maintenance, the service life of the sieve plate can be prolonged, and the overall maintenance cost can be reduced.

The invention provides a negative electrode material and a battery. The negative electrode material comprises graphite and an organic polymer material located on the surface and / or in the graphite; the negative electrode material comprises metal elements, and the metal elements comprise at least one of lithium, sodium, potassium and aluminum elements; the total mass of the negative electrode material is 100%, and the mass content of the metal element is 1300 ppm to 4400 ppm; the negative electrode material is provided with pores, and the volume ratio of the pores with the pore diameter ranging from 5 nm to 35 nm to the total pore volume is 15%-30%. The negative electrode material provided by the invention can comprehensively improve lithium ion transmission kinetics, first coulombic efficiency and cycle performance.

The invention discloses an automatic turnover device for a numerical control machining clamp, and relates to the technical field of numerical control machining, the automatic turnover device comprises a mounting table, a bearing plate is rotatably mounted on the mounting table, a rotating shaft is rotatably mounted on the bearing plate, the included angle formed by the extending direction of the rotating shaft and the rotating direction of the bearing plate is 90 degrees, and the rotating shaft is rotatably mounted on the mounting table; a connecting disc is mounted at the front end of the rotating shaft, and a clamp is arranged on the connecting disc; wherein the bearing plate is provided with a shaft hole for the rotating shaft to penetrate through, the rotating shaft is provided with a plurality of gas flow channels extending along the axis of the rotating shaft, and each gas flow channel is provided with a gas inlet end and a gas outlet end. Through cooperative work of the gas flow channel, the sealing ring, various adjusting components, the transmission assembly, the protection structure and the like, abrasion of the rotating shaft and the shaft seat is reduced, the machining cost is reduced, the service life of the components is prolonged, and the stability and reliability of the device are improved.

The invention provides a crucible preparation method and a crucible structure, and the crucible preparation method comprises the following steps: weighing quartz sand for pretreatment; the weighed quartz sand is poured into a rotating crucible mold for multiple times, and vacuumizing treatment is conducted at the same time, so that the side wall of a crucible is of a multi-layer structure; filling particles are poured into the rotating crucible mold, vacuumizing treatment is conducted at the same time, so that the filling particles are embedded in the inner wall of the crucible, and a concave-convex surface is formed on the inner wall of the crucible; and introducing current into an electrode above the crucible mold to form an electric arc in a high-temperature state, heating the quartz sand in the crucible mold for a preset time, closing the electric arc, cooling, and curing and forming to obtain a crucible body. In the crystal growth process, the embedded filling particles can reduce the direct contact area of molten silicon liquid and the inner wall of the crucible, so that the chemical reaction between the silicon liquid and the crucible is reduced, the service life of the crucible is prolonged, and the oxygen content in a silicon rod is reduced.

The utility model discloses a simple piston ring with oil storage grooves, which comprises a ring-shaped main body structure and is characterized in that a plurality of oil storage grooves are processed and formed on an excircle working surface of the ring-shaped main body structure by adopting a milling or grinding process, the plurality of oil storage grooves are annular and are uniformly distributed along the axial direction, the groove width of each oil storage groove is 0.5 mm, and the groove width of each oil storage groove is 0.5 mm. The depth of the oil storage grooves is 0.2 mm, and the sum of the widths of the oil storage grooves accounts for 1 / 3-1 / 2 of the height of the annular body structure. The lubricating device is simple in structure and good in lubricating effect.

The utility model provides a gas water heater heat insulation structure which comprises a water heater shell and a combustion chamber arranged in the water heater shell, the combustion chamber comprises a shell body, a combustion fire grate and an inner support, the shell body is fixed on the water heater shell through a first screw, and the inner support comprises a fixing plate and an installation plate which are of an integrated structure. The fixing plate is fixedly connected with the shell, and the mounting plate is arranged in the shell in a suspended mode and used for fixing the combustion fire grate. The inner support is arranged to install the combustion fire row, the heat transfer distance is prolonged, the direct contact area of the combustion fire row and the shell is reduced, therefore, heat transferred to the shell from the combustion fire row is reduced, and after the temperature of the shell is reduced, heat radiated outwards is also reduced.

The utility model relates to a liquid level transmitter which comprises an outer shell, a guide rod connected with the outer shell and a floating ball connected with the guide rod, the floating ball comprises an upper hemisphere and a lower hemisphere, the upper hemisphere and the lower hemisphere are provided with communicating holes connected with the guide rod, and gaps are reserved between the inner walls of the communicating holes and the outer wall of the guide rod. Steel ball holes are formed in the inner wall of the communicating hole at equal intervals, balls are movably installed in the steel ball holes, and the balls are in rolling fit with the outer surface of the guide rod. According to the structural design of the liquid level transmitter, the problem that in the prior art, a floating ball and a guide rod are prone to being stuck is solved, the reliability and efficiency of liquid level measurement are remarkably improved, and the liquid level transmitter has important value for optimizing industrial production process control, storage tank liquid level management and other application fields needing precise liquid level monitoring.

The present invention relates to the field of sanitary products, and provides a method for preparing a skin-friendly and soft sanitary napkin, which solves the defect of poor softness of the sanitary napkin in the prior art. The method comprises the following steps: preparing a liquid-permeable surface layer, preparing an absorbent body, preparing a liquid-impermeable bottom layer, and online compounding the liquid-permeable surface layer, the absorbent body and the liquid-impermeable bottom layer into one piece and cutting them into individual products. The preparation of the liquid-permeable surface layer comprises the following steps: (1) preparing raw materials; (2) preparing a soft foam body; (3) cutting the soft foam body; (4) transferring the cut soft foam body to the surface of the soft non-woven fabric, spraying or scraping hot melt adhesive in advance on the contact part between the soft non-woven fabric and the soft foam body, so that the cut soft foam body and the soft non-woven fabric are compounded into one piece, thus obtaining the liquid-permeable surface layer.

The application discloses a zinc battery negative electrode material, a preparation method thereof and a zinc ion battery. The zinc battery negative electrode material is a composite of a carbon base material and zinc nanoparticles; the carbon base material is a porous carbon material with through nano or sub-micron channels, the zinc nanoparticles are distributed in the channels of the carbon base material, the surface of the zinc nanoparticles is wrapped by a carbon network, and the carbon network anchors the zinc nanoparticles in the channels of the carbon base material. A pulse mode is adopted to alternately introduce zinc sources and carbon sources, and interval purging is performed after each introduction; in view of the unique physical and chemical characteristics of zinc, a synergistic process of "functional group guidance-pulse deposition-immediate anchoring" is designed, so that the deposition of zinc nanoparticles and the growth of the carbon network are alternately performed. The zinc battery negative electrode material can not only inhibit the growth of zinc particles in a long-term electrochemical cycle process, improve the utilization rate of zinc, but also reduce the direct contact area of zinc and electrolyte, and is helpful to inhibit the occurrence of side reactions such as hydrogen evolution.

The utility model discloses a hydrophobic textile fabric which comprises a fabric base layer, and a waterproof wire net is woven on the surface of the fabric base layer; the waterproof layer is arranged on the upper surface of the fabric base layer; the thermal insulation layer is arranged on the lower surface of the fabric base layer; and the lining layer is arranged on the lower surface of the thermal insulation layer. According to the waterproof fabric, the waterproof layer serves as a first waterproof protection layer, and the waterproof wire net woven on the surface of the fabric base layer serves as a second waterproof protection layer, so that on one hand, the waterproof wire net can reduce the direct contact area between water drops and the fabric base layer, and on the other hand, the fabric base layer woven by the waterproof wire net is more compact; the permeation speed of water drops to the inner layer of the fabric can be effectively slowed down.

The shock-resistant printed circuit board structure comprises a circuit board body, a buffer square frame, a shock-resistant assembly and a fixing plate, a protective frame is arranged on the edge of the outer surface of the circuit board body, the buffer square frame is arranged below the circuit board body, and the fixing plate is arranged on the lower end face of the buffer square frame. The anti-seismic assemblies are arranged on the lower end face of the fixing plate, the number of the anti-seismic assemblies is two, a heat dissipation opening is formed in the center of the fixing plate, eight threaded holes are formed in the edge of the heat dissipation opening, and bolts are installed in inner cavities of the eight threaded holes. According to the anti-seismic printed circuit board structure for the vegetable cutter, the circuit board is fixed to the fixing plate through meshing of the bolts and the threaded holes, movement and loosening displacement of the circuit board can be effectively prevented, the damage risk of the circuit board is reduced, the anti-seismic performance of the circuit board in a vibration environment can be effectively improved by using the anti-seismic assembly, and the service life of the circuit board is prolonged. And the equipment is protected from being influenced by external vibration.

This utility model discloses antistatic stockings, belonging to the field of stocking technology. The stockings include a body comprising a waistband, hip / abdomen, legs, and feet. Several moisture-wicking strips are alternately arranged on the inner side of the stocking, extending along the hip / abdomen, legs, and feet. Conductive threads are also incorporated into the stocking, spirally distributed along the legs, with the pitch gradually increasing towards the feet. The alternately arranged moisture-wicking strips reduce the direct contact area between the stocking and the body, absorbing and dispersing sweat, keeping the stocking moisturized, and reducing the possibility of static electricity generated by dry friction. The spirally wound conductive threads further conduct and neutralize static electricity. The moisture-wicking strips are made of multi-strand modal fiber twisted into a moisture-wicking, skin-friendly yarn bundle, providing excellent moisture-wicking and breathability. The conductive threads are made of copper ion fiber and velvet yarn twisted into a conductive yarn bundle, providing excellent skin-friendliness and conductivity.

This invention discloses a zinc battery anode material, its preparation method, and a zinc-ion battery. The zinc battery anode material is a composite of a carbon substrate and zinc nanoparticles. The carbon substrate is a porous carbon material with through-hole nano- or submicron pores. The zinc nanoparticles are distributed within the pores of the carbon substrate, and their surfaces are encapsulated by a carbon network, which anchors the zinc nanoparticles within the pores of the carbon substrate. A synergistic process of "functional group guidance—pulse deposition—instant anchoring" is designed, taking into account the unique physicochemical characteristics of zinc, to achieve alternating deposition of zinc nanoparticles and growth of the carbon network. This zinc battery anode material not only inhibits zinc particle growth and improves zinc utilization during long-term electrochemical cycling, but also reduces the direct contact area between zinc and the electrolyte, helping to suppress side reactions such as hydrogen evolution.

The utility model relates to the technical field of crystalline silicon cell production and manufacturing, in particular to a novel chain type roller fragment structure which comprises a pressing rod and a connecting rod. A plurality of groups of connecting rods are mounted at the outer ends of the plurality of groups of pressing rods, the outer wall of one group of connecting rods is sleeved with an anti-pinch wheel, and cold air knives are mounted on the outer sides of the plurality of groups of pressing rods and the outer sides of the connecting rods. According to the utility model, the anti-pinch roller is used for supporting, the use of a water-driving roller is reduced, the direct contact area between the silicon wafer and the compression bar roller is reduced, the friction force and extrusion gravity generated by contact are reduced, the risk that the silicon wafer is broken due to external force in the transmission process is effectively reduced, and the surface quality of the silicon wafer is improved; production interruption and extra cleaning work caused by fragments are reduced; and the next roller in the rollers is changed into a cold air knife, nitrogen blowing is used for replacing mechanical extrusion water driving, high-speed and low-temperature airflow is provided, moisture on the surface of the silicon wafer can be quickly dried, and the production efficiency is improved.

The invention discloses a production method of monocrystal lithium manganese aluminate, which belongs to the technical field of preparation of lithium ion battery cathode materials, and comprises the following steps: taking manganous-manganic oxide, lithium carbonate and an aluminum-containing raw material, with the molar ratio of lithium carbonate to manganous-manganic oxide being Li: Mn being 0.50-0.55, the molar ratio of lithium carbonate to the aluminum-containing raw material being Li: Al being 1.00-1.05, and at the same time, carrying out a reaction for 2-3 hours to obtain the monocrystal lithium manganese aluminate. Adding a doping agent accounting for 0.02%-2.0% of the theoretical product mass, and mixing to obtain a uniform raw material; sintering the raw materials in an oxygen-enriched atmosphere at 800-950 DEG C for 8-16 hours to obtain a lithium manganese aluminate semi-finished product; crushing and crushing the lithium manganese aluminate semi-finished product to obtain a crushed product; through the synergistic effect of aluminum element doping and oxygen-enriched high-temperature sintering, the structural stability of the material is fundamentally improved.

The utility model discloses a module storage battery packaging support in the technical field of storage battery packaging, including the electric core module, the outside of electric core module is provided with the packaging connection subassembly, the outside installation of packaging connection subassembly has the protective housing, one side of protective housing still is connected with the sealing cover, and packaging connection subassembly includes the packaging inner frame, and the outside of packaging inner frame is provided with the packaging outer frame, and this packaging support can realize quick installation and limit fixed of multiple electric core modules through the transition cooperation between metal sleeve hoop and electric core module and the clamping cooperation between the inlaying clamping plate and the inlaying clamping seat, can effectively promote the assembly efficiency of electric core module, compared with the mode of adopting the bolt fixedness of tradition, this structure can avoid the fastening procedure of tedious, significantly shorten the assembly cycle, and still support the independent dismounting and replacement of single electric core module, the modular maintenance of user according to the demand is convenient, and the whole group battery because of local damage and the whole replacement condition are reduced.

This invention relates to a hot press head and hot press equipment, belonging to the technical field of hot press equipment. It includes a base, a heat insulation block, a heating element, a support member, a first heat dissipation hole, and a pipe connector. The heat insulation block is disposed on the base, and the heating element is disposed on the side of the heat insulation block facing away from the heating element. The support member is disposed between the heating element and the heat insulation block, supporting the heating element on the heat insulation block. The gap between the heating element and the heat insulation block forms a heat dissipation cavity. The first heat dissipation hole is disposed on the heat insulation block, with one end communicating with the heat dissipation cavity. The pipe connector is disposed on the heat insulation block or the base, for sequentially delivering heat dissipation airflow to the first heat dissipation hole and the heat dissipation cavity. This invention significantly reduces the direct contact area between the heating element and the heat insulation block, reduces heat conduction, increases the heating rate of the heating element, and significantly improves heat dissipation efficiency and uniformity.

The invention discloses a nerve electrophysiological signal acquisition device and an acquisition method thereof, and relates to the technical field of physiological signal acquisition, the nerve electrophysiological signal acquisition device comprises an acquisition box seat, the bottom of the acquisition box seat is provided with a constraint arc seat, the inner side of the constraint arc seat is provided with an acquisition arc frame, and the inner side of the acquisition arc frame is provided with an acquisition electrode plate; an arc-shaped cavity is formed in the center of the interior of the collecting arc frame, and the increment auxiliary electrode plate is installed at the telescopic end of the round telescopic rod. The range enlarging assembly is arranged on the inner side of the arc-shaped cavity, the round telescopic rod drives the increment auxiliary electrode plate to move out of the arc-shaped cavity during signal collection, the signal collection coverage area is remarkably enlarged through cooperative work of the increment auxiliary electrode plate and the main collection electrode plate, more and more comprehensive physiological signals can be captured, and the signal collection accuracy is improved. Data errors caused by incomplete signal acquisition are reduced, the intensity and stability of the acquired signals are further improved, and the accuracy and reliability of data are further improved.

The present invention belongs to the field of ship technology, and relates to an efficient drag reduction buoy system for unmanned hydrofoil vessels based on air film stabilization control. The system includes a buoy, an airflow conduction system, a sensor system, a control system and an actuator; the airflow conduction system includes an air supply system and an airflow conduction groove; a one-way exhaust hole is arranged at the bottom of the buoy, and is connected to the air supply system through a pipeline; the airflow conduction groove is V-shaped and distributed along the central axis of the buoy at the bottom of the buoy, and one end thereof is connected to the one-way exhaust hole; the sensor system is arranged at the bottom of the buoy; the control system includes a data acquisition module and a control mainboard; the data acquisition module is used to collect data from the sensor system and transmit it to the control mainboard; the control mainboard is used to execute an adaptive control algorithm and output a control signal to the actuator to adjust the output of the airflow in real time. The present invention can analyze the data fed back by the sensor in real time, adjust the airflow output, and realize adaptive adjustment of the air film under different water flow, speed, and pressure changes.

The utility model relates to a kind of LED chip structure for improving device performance, recess that is through second semiconductor layer and active layer, and extend to the inside of first semiconductor layer;With the ohmic contact of second semiconductor layer, the first conductive layer is covered in the part surface of second semiconductor layer and forms regular recess on the surface of first conductive layer first insulating layer;Covered in the part surface of first insulating layer and filled in the recess formed by first insulating layer, and the first reflective layer is electrically connected with first conductive layer;Covered in the part surface of first insulating layer and forms electrically connected with first reflective layer second conductive layer, covered in the sidewall of recess and the second insulating layer of first electric connection layer side, covered in the part surface of second insulating layer and filled in recess second reflective layer, second reflective layer forms ohmic contact with first semiconductor layer.The utility model improves external quantum efficiency, i.e. Lower forward voltage, improve chip brightness;Reduce thermal effect, prevent metal migration to cause failure.

The invention provides a warping horizontal shooting device and a working method thereof, and belongs to the technical field of flat glass substrate inspection.The warping horizontal shooting device comprises a warping glass back plate parallel to the ground, a pneumatic ejector block is arranged on the warping glass back plate, a supporting sectional material is installed at the bottom of the warping glass back plate, and a plurality of stand columns are installed outside the warping glass back plate; a grating plate is installed at the top of the stand column, the plate face of the grating plate is flat and free of light reflection, the grating plate comprises a curtain plate, grating curtain plate grid paper is attached to the curtain plate through the pasting position of the grating curtain plate grid paper arranged on the side portion, camera installation holes are formed in the grating plate, and a plurality of steel ropes are fixed to the grating plate. According to the device, bottom deformation can be eliminated, warping shooting accuracy is ensured, the device is suitable for a large board, the warping shooting effect is greatly optimized, the requirement for manual operation and the time cost are reduced, and therefore the warping shooting accuracy is remarkably improved, and the detection and transfer efficiency is improved.

The utility model belongs to the technical field of assembly connecting structures, and particularly relates to a stand column and partition row connecting structure which comprises a T-shaped connecting block and a trapezoid connecting block, a fixing screw hole is formed in the trapezoid connecting block, and a partition row is located between two sets of stand columns. The partition rows are fixedly arranged between the stand columns on the two sides through matching of the T-shaped connecting blocks and the trapezoidal connecting blocks, trapezoidal movable grooves are formed in the side edges of the stand columns, the trapezoidal connecting blocks are arranged in the trapezoidal movable grooves in a sliding mode, and the trapezoidal connecting blocks and the trapezoidal movable grooves are each of an isosceles trapezoid structure. The angle of the two bevel edges of each trapezoid connecting block is smaller than that of the two bevel edges of each trapezoid movable groove, through cooperation of the structures, the height of the portions, fixed to the stand column in a spaced mode, of the stand column can be adjusted according to needs, the application range is widened, and fixing is firmer through cooperation of the trapezoid connecting blocks and the trapezoid movable grooves.

The invention provides a frog forging die with an automatic die opening function and a die forging process of the frog forging die. The frog forging die comprises a lower base plate, a spring, a spring core, a lower die, a limiting block, an upper base plate, an upper cushion block, a guide sleeve, an upper die and a guide column. The upper and lower dies are connected with the upper and lower base plates in a positioning and fastening manner through flat keys; the upper die and the lower die are vertically guided through a guide post and a guide sleeve which are arranged at opposite angles of the base plate in a set manner; the guide sleeve and the upper base plate are installed in a vertical interference fit mode. The guide column and the lower base plate are vertically mounted in an interference fit manner; the number of the springs is four, and two of the springs are arranged on the guide columns at the diagonal positions in a sleeving mode correspondingly. The other two spring cores are sleeved on the spring cores at the diagonal positions; the spring core is vertically assembled on the lower base plate in an interference manner; the upper cushion block is fixedly mounted in the center of the upper surface of the upper cushion plate in a fastening manner. By avoiding clamp manufacturing, manufacturing and mounting of a traditional die forging die connecting die forging press and a die forging upper die clamp are avoided, finally, the die manufacturing difficulty is reduced, the die cost is reduced, and the working efficiency is improved.

The invention belongs to the technical field of table vinegar processing, and particularly relates to ganoderma lucidum honey brewed vinegar and a preparation method thereof. Fermented vinegar liquid obtained through fermentation of a fermentation inoculant culture solution and gluconacetobacter hansenii is mixed with nutrition particles capable of reducing irritation and obtained after freezing nano spray drying, and the prepared flavored fermented vinegar liquid is low in irritation and good in flavor; the stomach protection solution obtained through extraction is mixed with a stable solution containing behenic acid and morpholine fatty acid salt, and the prepared stomach protection soothing agent protects gastric mucosa and enamel from being damaged; the stomach-protecting soothing agent and the stability-maintaining calcium-supplementing solution are mixed and uniformly dispersed in the flavored fermented vinegar liquid for ultrahigh-temperature instantaneous sterilization, and the prepared ganoderma lucidum honey brewed vinegar is good in flavor, free of irritation to oral mucosa and gastric mucosa, free of damage to enamel, free of osteoporosis and free of deterioration after long-term storage.

The utility model relates to a wear-resistant elbow, which belongs to the technical field of elbow pipe fittings and comprises a barrel, a cavity is arranged in the barrel, and a feeding pipe and a discharging pipe which are communicated with the cavity are arranged on the circumferential side wall of the barrel. A cavity is formed in the barrel, the cavity penetrates through the two opposite side walls of the barrel, baffle plates are arranged on the inner wall of the cavity, the length direction of the baffle plates is consistent with the penetrating direction of the cavity, the multiple sets of baffle plates are arranged on the inner wall of the cavity in an arrayed mode, a storage groove is formed by every two adjacent sets of baffle plates, and the baffle plates are arranged in the storage groove. Baffles used for shielding the cavity are welded to the two opposite side walls of the barrel. The elbow is simple in structure and good in economical efficiency and practicability, meanwhile, the abrasion phenomenon of the elbow is reduced, and the damage phenomenon of granular materials is reduced.

The present invention relates to the technical field of metal sheet manufacturing, and specifically to an intelligent metal sheet manufacturing device, comprising a cold rolling mill body and a rolling roller, and also comprising a leveling wheel. The leveling wheel is located on the cold rolling mill body, and a plurality of leveling wheels are provided, and the two ends of the leveling wheel have different thicknesses, and the concave positions on the metal sheet are leveled by the leveling wheel. When this intelligent metal sheet manufacturing device is used, it is different from the prior art. The advantage of the leveling mechanism setting is that the material on both sides of the metal sheet is pushed to fill the concave positions by the leveling wheels with different thicknesses at both ends, which can ensure uniform force and avoid material deformation caused by excessive local force. On an automated production line, this leveling method can continuously process the metal sheet, greatly improving the leveling efficiency. At the same time, compared with the traditional leveling method, this design reduces the direct contact area between the metal sheet and the leveling tool, and reduces the risk of scratches caused by friction.

The invention discloses a radiometer to the ground, which comprises a shell and a dust blocking sleeve fixedly arranged at the bottom end of the shell, a dust blocking diaphragm is fixedly arranged in the dust blocking sleeve, the dust blocking diaphragm is provided with nine optical channel holes which are circumferentially distributed, and the dust blocking diaphragm is also provided with three internal thread seat holes which are circumferentially distributed; a locking assembly is arranged in the internal thread seat hole and comprises a positioning sleeve seat, a tightening block arranged in the positioning sleeve seat and a pre-tightening spring arranged in the positioning sleeve seat, and a positioning guide shaft is installed at the upper end of the pre-tightening spring. According to the invention, the dust blocking sleeve is in threaded connection with the bottom of the shell, and the dust blocking diaphragm is in threaded connection with the interior of the dust blocking sleeve, so that the installation efficiency and the convenience of after-sales maintenance of the light window are improved, and any tool is not needed to disassemble any screw to complete the cleaning operation after pollution of the light window glass.

The utility model relates to the technical field of household appliances, in particular to a panel assembly of a cabinet air conditioner and the cabinet air conditioner, and aims to solve the problem that scratches or abrasion marks are easily left on the surface of a panel of an existing cabinet air conditioner. Therefore, the panel assembly comprises a lower decoration plate and a side panel, the side panel is located on the front side of the lower decoration plate, the edge, close to the lower decoration plate, of the side panel is provided with a turned-over edge extending towards the lower decoration plate, the first end face of the turned-over edge is provided with a protruding structure, and the protruding structure abuts against the outer surface of the lower decoration plate. The first end face is the end face, facing the lower decoration plate, of the turned edge. Through the structural design, the risk that scratches or abrasion marks are left on the lower decoration plate due to direct contact and mutual friction between the lower decoration plate and the side panel can be avoided, and after the scratches are generated due to mutual friction between the protruding structures and the lower decoration plate, the scratches can be covered by the end faces, facing the lower decoration plate, of the turnups, the scratches are prevented from being exposed, and the service life of the lower decoration plate is prolonged. And the overall aesthetic property of the panel assembly is improved.

The utility model provides an optimizing device suitable for a PDH device special valve sealing gas system, and relates to the technical field of petrochemical equipment, the optimizing device comprises a collision control block, the collision control block is of a cylindrical structure, the first end of the collision control block is provided with a threaded groove used for being in threaded fit with a switch valve rod of an angle valve, and the second end of the collision control block is provided with a second threaded groove. A containing groove is formed in the second end of the collision control block, a rotating piece is rotationally arranged in the containing groove, and part of the rotating piece is exposed out of the second end of the collision control block. The first end of the collision control block is in threaded fit with the switch valve rod through the threaded groove, so that connection between the collision control block and the angle valve is more stable and reliable. The second end of the collision control block is rotationally provided with the rotating part, the rotating part is in collision contact with the collision block, the direct contact area with the collision block can be effectively reduced, stress generated by collision is reduced, the stress generated by collision can be released through rotation of the rotating part, and the service life of the collision control block is further prolonged.