503results about How to "Increase width" patented technology

The invention relates to the technical field of photovoltaics, and discloses a TBC battery structure capable of automatically forming gap areas and a PVD preparation method thereof.The TBC battery structure comprises a silicon substrate, p + areas and n + areas are arranged on the back surface of the silicon substrate, the height positions of the p + areas and the n + areas on the back surface of the silicon substrate are staggered to form steps, and the steps are arranged on the back surface of the silicon substrate. A gap region is formed on the side wall of the step connecting the p + region and the n + region, and the gap region is used for electrically isolating the p + region and the n + region; the p + region comprises a first tunneling oxide layer, a p-poly layer, a second tunneling oxide layer and an n-poly layer which are sequentially deposited on the silicon substrate; and the n + region is provided with a second tunneling oxide layer and an n-poly layer which are sequentially deposited on the silicon substrate. According to the invention, the p-poly is superposed with the n-poly to form the tunnel junction, so that the n-poly on the p-poly can be directly prevented from being removed by using the second laser, the damage of the laser to the crystalline silicon layer on the surface is avoided, meanwhile, a laser grooving process is reduced, and the production cost is greatly reduced.

The invention discloses a hydrodynamic simulation test system and method for scouring protection of a human-shaped submerged dike offshore wind power pile foundation under reciprocating flow, and the method comprises the steps: collecting environment and reciprocating flow data, and building a numerical model of the influence of the reciprocating flow on the pile foundation through the hydrodynamics; numerical simulation is carried out through the numerical model, the human-shaped submerged embankment and an offshore wind power pile foundation model, experimental verification is carried out, the numerical model is optimized, and the optimal angle, length and width of the human-shaped submerged embankment and the optimal distance between the human-shaped submerged embankment and the pile foundation are adopted in an optimized mode, so that scouring of the pile foundation is effectively reduced, and the durability and the protection effect of the human-shaped submerged embankment are improved; the method comprises the following steps: establishing a numerical model of the influence of a reciprocating flow on a pile foundation based on data in S1 and by adopting a fluid dynamics principle in S2, and establishing a physical model of an offshore wind power pile foundation and a human-shaped submerged dike in S3 at the same time; a numerical model and a physical model under a reciprocating flow condition are provided.

The invention provides an infrared weak and small target detection method and system, electronic equipment and a storage medium, and belongs to the technical field of target detection, and the method comprises the steps: improving a YOLOv8 model for the features of an infrared weak and small target image; and performing target detection on the infrared weak and small target image by using the improved YOLOv8 model. According to the invention, a stronger infrared weak and small target detection capability is provided for the YOLOv8 model, and the problem of target detection precision bottleneck of a traditional model in a complex scene is effectively solved.

The invention discloses edge cutting equipment for aluminum curtain wall material plate machining, and relates to the technical field of plate edge cutting equipment. Comprising a base; the bottom end of the top cover is fixedly connected with the outer wall of the base; the outer walls of the rollers are rotationally connected with the inner wall of the base, and the rollers are linearly arrayed along the inner wall of the base. The driving device is arranged, the friction rollers are driven by the driving motor and the belt pulley set, plates can be rapidly and stably pushed to move towards the cutting device, the conveying efficiency of the plates is improved, and the conveying efficiency of the plates is improved. Therefore, the edge cutting operation speed is increased, and all parts of the equipment work cooperatively, so that the whole machining process is smooth and efficient. And all links of limiting, conveying, cutting and chip removing of the plate are in close fit, so that the operation time and the labor cost are reduced, and the production efficiency is improved.

The invention discloses a psychrobacter haeli PN-Ta3 derived from turbot intestinal tracts and application of the psychrobacter haeli PN-Ta3, and belongs to the technical field of microorganisms. The psychrophilus haeli PN-Ta3 is separated from the intestinal tract of a healthy cultured turbot, and is preserved in the China Center for Type Culture Collection, the preservation address is Wuhan, China, the preservation date is January 25, 2024, and the preservation number is CCTCC NO: M2024201. The psychrobacter nivalis PN-Ta3 disclosed by the invention has the beneficial effects that the psychrobacter nivalis PN-Ta3 has no pathogenicity to healthy turbots and has good colonization performance, and after the psychrobacter nivalis PN-Ta3 is prepared into freeze-dried bacterial powder and is mixed with and added to feed the turbots, not only can the growth and intestinal development of the cultured turbots be promoted, but also the intestinal microbial structure is optimized; the composition can also delay the morbidity and death of turbots caused by infection of aeromonas salmonicida BHAS-1.

The invention relates to a nozzle module and a three-dimensional printer. The nozzle module comprises a heat dissipation assembly; the locking assembly comprises a clamping ring piece fixed to the heat dissipation assembly and a knob piece connected to the clamping ring piece, the clamping ring piece is provided with a clamping hole and an opening which penetrate through the clamping ring piece in the first direction, and the opening communicates with the clamping hole; the nozzle assembly sequentially penetrates through the clamping hole and the heat dissipation assembly in the first direction; wherein the knob part can rotate relative to the clamping ring part, and under the condition that the knob part rotates relative to the clamping ring part, the width of the opening is selectively decreased or increased, so that the clamping ring part clamps or releases the nozzle assembly. Quick mounting and quick dismounting can be achieved, mounting and dismounting are convenient, and the mounting and dismounting efficiency is improved.

The invention relates to the technical field of transparent conductive material repairing, in particular to a repairing method of a micro-metal network structure based on electrochemical deposition. The repairing method of the micro-metal network structure based on electrochemical deposition comprises the following steps: S1, preparing a corresponding electrolyte mixed solution according to the type of metal in the micro-metal network structure to be repaired, and placing the electrolyte mixed solution in an electrolytic bath; and S2, the micro-metal network structure to be repaired is placed in an electrolytic bath to be repaired. S3, judging whether the micro-metal network structure is repaired or not; and if the repair is completed, taking out the micro-metal network structure from the electrolytic bath, and if the repair is not completed, repeating the step S2 until the repair of the micro-metal network structure is completed. According to the repairing method, the electrochemical deposition principle is utilized, material deposition can be accurately carried out at the defect position of the micro-metal network structure, directional repairing is achieved, and the conductivity and the light transmittance of the repaired micro-metal network structure are improved.

The invention discloses a COD (Chemical Oxygen Demand) prediction method based on a two-channel convolution time sequence mechanism, which comprises the following steps of: acquiring COD original data for preprocessing to obtain COD input characteristics; constructing a prediction model, and importing data into a dual-channel convolution module; importing the first double-channel convolution output feature vector and the second double-channel convolution output feature vector into a double attention memory network to obtain a time sequence dependence feature; the time sequence dependence characteristics are imported into an output module, and predicted COD output is obtained; training the model, and in the training process, optimizing hyper-parameters of the model based on an improved pelican algorithm; and importing real-time COD original data into the trained model, and obtaining real-time COD output. According to the method, a high-efficiency effluent COD content prediction model of the sewage treatment plant is constructed by creatively fusing the two-channel convolution and the double-attention memory network.

The invention discloses an annular laser cladding nozzle which comprises a nozzle body, a laser channel is formed in the center of the nozzle body, the nozzle body is provided with a plurality of gas-powder mixing cavities, an annular powder channel, a cooling channel and an annular gas storage bin, and the gas-powder mixing cavities are annularly formed in the periphery of the laser channel at intervals; each gas-powder mixing cavity is communicated with a powder feeding channel for inputting metal powder, a lower outlet of each gas-powder mixing cavity is communicated with an annular powder channel, and the annular powder channel is provided with a plurality of flow guide baffles. Powder enters the gas-powder mixing cavity and flows into the annular powder channel by means of gravity and air pressure. A flow guide baffle arranged in the annular powder channel effectively guides powder to flow, concentrated accumulation is prevented, and uniform distribution is guaranteed. The cooling efficiency of the nozzle is improved through the design of the cooling channel, cooling liquid circulates along an S-shaped loop, and it is ensured that the nozzle stably works under the high-temperature condition. In addition, the annular gas storage bin is further arranged, local excessive concentration of shielding gas is avoided, and therefore the stability of the cladding process is improved.

The invention discloses a landslide surface inspection method based on RTDETR, and the method comprises the steps: collecting and obtaining an existing open-source landslide type data set, dividing the existing open-source landslide inspection data set into a training set, a verification set and a test set, and carrying out the specific scene data enhancement and conventional data enhancement operation of the data of the training set; constructing a landslide surface inspection model which is jointly formed by a ResNet-based multi-scale adaptive convolutional feature extraction backbone network, a CNN + Transform-based multi-scale feature fusion layer, and a DETR decoding layer and an adaptive high-order matching cost function-based detection head frame; learning weight parameters by using the training set, further optimizing and adjusting the verification set, and finally testing the landslide surface inspection model by using the test set to determine a final detection result; the accuracy of landslide type detection is greatly improved.

The invention relates to the technical field of water conservancy projects, and discloses a water conservancy project construction dust falling device which comprises a barrel and a base, a supporting frame is mounted in the barrel, a tail mounting frame is mounted at one end of the barrel, a filter screen is mounted on the tail mounting frame, and a plurality of connecting frames distributed annularly are mounted at the other end of the barrel; the ends, away from the cylinder, of the connecting frames are fixedly connected with the fixing cylinder. The problem that the spraying distance of the device is shortened due to the fact that the wind power of rapid airflow generated by the fan blades is reduced under the upwind condition is solved, the gathering and scattering state of the multiple spraying heads can be adjusted in a self-adaptive mode according to the wind power of the rapid airflow blown out by the fan blades, use is convenient, and in addition, the spraying distance of the device is shortened. The gathering and scattering states of the multiple sprays can be adaptively adjusted through the wind power of the airflow blown out by the fan blades, the gathering and scattering states of the multiple spraying heads can be actively controlled through the adjusting and controlling assembly, automatic and manual dual control is achieved, and the using effect is good.

The invention provides a deslagging device and method for vertical shaft construction, and belongs to the technical field of vertical shaft construction auxiliary equipment.The deslagging device for vertical shaft construction comprises a sliding supporting mechanism, a well mouth supporting mechanism, a rotating disc, a plurality of slag shoveling mechanisms, a plurality of transverse conveying mechanisms and a longitudinal conveying mechanism located in the middle of a vertical shaft; the sliding supporting mechanism is arranged in the vertical shaft in a sliding mode and fixed to the designated position of the shaft wall through an abutting piece. The well mouth supporting mechanism is installed at the well mouth position of the vertical shaft and provided with a lowering assembly used for lowering the sliding supporting mechanism into the vertical shaft. The rotating disc is rotationally installed on the face, facing the shaft bottom of the vertical shaft, of the supporting frame, the multiple slag shoveling mechanisms are distributed at the bottom of the rotating disc in the circumferential direction of the rotating disc, the multiple transverse conveying mechanisms are correspondingly arranged on one sides of the slag shoveling mechanisms and used for conveying the slag to the longitudinal conveying mechanism, and the longitudinal conveying mechanism is used for conveying the slag out of the vertical shaft. The slag discharging efficiency can be improved, and meanwhile the slag discharging device is not limited by slag characteristics and using conditions.

The utility model discloses improved land surveying and mapping equipment adaptive to multiple terrains, and relates to the technical field of surveying and mapping devices. Comprising a rolling ruler body, an auxiliary device is installed on the side face of a rolling wheel hub of the rolling ruler body, the auxiliary device is used for increasing the contact area between a rolling wheel of the rolling ruler body and the ground and reducing the sinking depth, the auxiliary device comprises a connecting flange plate, and the connecting flange plate is fixedly connected to the side face of the rolling wheel hub of the rolling ruler body. The side face of the connecting flange plate is fixedly connected with a supporting face, the bottom of the supporting face is horizontal with the bottom of the roller of the rolling ruler body, the connecting flange plate is installed on the side face of a hub of the roller of the rolling ruler body, the edge of the connecting flange plate extends out of the supporting face, and therefore the width of the roller of the rolling ruler body is increased through the supporting face. And the contact area with the ground is increased, so that the device can float on the ground in silt and soft terrains and is not easy to sink, and the effect of surveying and mapping in the silt and soft terrains is achieved.

The utility model discloses a plug of a power adapter, which relates to the technical field of power adapters and comprises a shell, a plug body and a plug body. The plug pin is connected to the shell, and at least part of the plug pin extends into the accommodating cavity; the circuit board is arranged in the accommodating cavity, a golden finger contact is arranged on the circuit board, and a plurality of contacts are arranged on the golden finger contact at intervals; the conductive elastic sheet is clamped and connected in the accommodating cavity, the conductive elastic sheet is provided with a first connecting end corresponding to the pin and a second connecting end corresponding to the golden finger contact, and at least two abutting elastic sheets are arranged on the second connecting end at intervals, so that one abutting elastic sheet abuts against the plurality of contacts; therefore, the contact area of the conductive elastic sheet and the golden finger contact can be increased, so that the contact impedance of the conductive elastic sheet and the PCB is effectively reduced, and the power adapter plug can meet the requirement of high-voltage thunder and lightning tests.

The invention relates to the technical field of pipeline connection, in particular to a three-way pipe fitting which comprises a pipeline body and a first flow dividing assembly. The pipeline body comprises a first pipeline and a second pipeline which are perpendicular to each other, one end of the first pipeline is a water inlet end, the other end of the first pipeline is communicated with the second pipeline, one end of the second pipeline is a first water outlet end, and the other end of the second pipeline is a second water outlet end. The first flow dividing assembly is installed in the flow dividing cavity and comprises a connecting rod and a flow dividing plate. The connecting rod is parallel to the pipe length direction of the first pipeline, the connecting rod is connected into the pipeline body, the two splitter plates are connected to the connecting rod, the two splitter plates are obliquely arranged, the splitter plates are symmetrically arranged along the connecting rod, and the splitter plates are rotationally connected to the connecting rod. The three-way pipe fitting has the effect of effectively controlling the medium flow in the three-way pipe fitting.

The invention discloses a loose aquifer grouting simulation test device and method, and the device comprises an aquifer simulation body which is of a cylinder structure formed by stacking a plurality of layers of cylinder cavities; a digital information acquisition system is embedded in the aquifer simulation body; and a slurry supply system is communicated with the inner cavity of the aquifer simulation body. The device is used for the grouting simulation experiment of the loose aquifer under multi-field environment coupling. The device can simulate the grouting conditions of broken rocks and sand clay with different proportions under different drainage modes and grouting parameters, and further analyzes the diffusion mechanism and grouting reinforcement mechanism and effect of the grout in the unconsolidated formation.

The invention discloses a manufacturing method of a semi-high-speed steel supporting roller, which belongs to the field of roller manufacturing and comprises the following steps: preparing steel raw materials, so that the steel comprises the following chemical components in percentage by weight: 0.35-0.45% of C, 1.20-1.40% of Si, 0.40-0.60% of Mn, 7.00-9.00% of Cr, less than or equal to 1.00% of Ni, 2.00-3.00% of Mo, 0.50-0.80% of V and less than or equal to 0.010% of P; s is less than or equal to 0.010%; and the balance of Fe and inevitable impurities. Molten steel is prepared according to a steel smelting principle, and a steel ingot is prepared by pouring the molten steel according to a low-pouring-speed technology; a steel ingot is manufactured into a roller blank according to a forging procedure production process, the roller blank is sequentially subjected to heat treatment including preheating, high-temperature heating, precooling, rapid cooling and three times of tempering, the roller blank subjected to heat treatment is machined, the dimensional tolerance and the form and location tolerance of all parts are guaranteed, and finally the forged steel supporting roller made of the semi-high-speed steel material is obtained. According to the method, the large forged steel supporting roller with high wear resistance and high accident resistance can be produced, and production is effectively guaranteed.

The invention relates to the technical field of infrared temperature measurement, in particular to an infrared thermal imaging device for a wide temperature measurement range and a design method of the infrared thermal imaging device. The design method comprises the steps that an all-pass plane mirror with the average infrared spectrum transmittance being 1 is arranged between a front-end optical system and a rear-end infrared detector; establishing a linear relation among the average infrared spectrum transmittance, the radiation temperature and the response total gray scale; determining the lower limit temperature corresponding to the response gray lower limit and the upper limit temperature corresponding to the response gray upper limit of the all-pass plane mirror according to the linear relation; at least one attenuation plane mirror for an infrared spectrum is designed between the front-end optical system and the rear-end infrared detector; and taking the upper limit temperature corresponding to the all-pass plane mirror as the lower limit temperature corresponding to the attenuation plane mirror, and calculating the average infrared spectrum transmittance of the attenuation plane mirror and the upper limit temperature corresponding to the attenuation plane mirror according to the linear relation. According to the scheme, wide-range temperature measurement can be realized.

The embodiment of the invention provides a display module, a manufacturing method thereof and a display device, relates to the technical field of display, and is used for effectively preventing glue from flowing to a display area. The display module comprises a display panel, the display panel comprises a display area and a first non-display area located on the periphery of the display area and further comprises a substrate and a first film layer located on one side of the substrate, the first film layer comprises an auxiliary sub-part, the auxiliary sub-part is located in the first non-display area, and the auxiliary sub-part comprises a groove or a protrusion.

The invention relates to the technical field of aero-engine welding, in particular to a welding device and method for a thick plate installation supporting point assembly. The welding device comprises a front face device and a back face device, and during front face welding and back face welding, when the flange edge is placed on the positioning assembly, the flange edge is in butt joint with a pre-placed to-be-welded supporting point welding seam to form an X groove. An X groove is subjected to pre-welding cleaning, positioned welding and backing welding through manual argon arc welding and wire filling through automatic argon arc welding, and the complete welding process is achieved. Compared with manual argon arc welding, the reasonable machining method and suitable welding parameters are adopted, the appearance quality of welding seams of automatic argon arc welding is remarkably improved, and the welding deformation control effect on the titanium alloy X-shaped groove assembly is good.

The invention discloses a multi-reflection cavity enhanced Raman system and a use method. The multi-reflection cavity enhanced Raman system comprises a concave mirror, a converging lens and an optical fiber bundle, the optical fiber bundle comprises a plurality of optical fibers which are horizontally arranged, a converging lens, a parallel lens, a reaction part and a concave mirror are distributed at the input end of each optical fiber, and a first lens and a first retroreflector as well as a second lens and a second retroreflector are arranged at the two ends of the reaction part. Then the laser signal reacts with the to-be-detected gas to generate a Raman signal, a part of the Raman signal is reflected by the concave mirror, and then the Raman signal is converged in the optical fiber by the converging lens and the parallel lens to be received; raman signals excited on the horizontal plane are matched with the horizontally arranged optical fibers, so that the receiving effect is good; the intensity of the laser signal at the reaction position is high, so that the intensity of the generated Raman signal is high. Therefore, the design has a relatively good receiving effect on the Raman signal, and the intensity of the received Raman signal is relatively high.

The invention relates to the field of heat dissipation structures, and discloses a preparation method of a graphene heat dissipation structure and the graphene heat dissipation structure. The preparation method comprises the following steps: carrying out die cutting operation on a single-sided adhesive to obtain a molded single-sided adhesive layer, carrying out die cutting operation on a graphene heat dissipation layer to obtain a molded graphene heat dissipation layer, oppositely attaching the molded graphene heat dissipation layer to a first adhesive layer, and carrying out die cutting operation on a first double-sided adhesive to obtain a molded double-sided adhesive tape; the formed double-faced adhesive tape is attached to the first adhesive layer in an opposite mode, the second double-faced adhesive tape is subjected to die cutting operation, a formed double-faced adhesive tape layer is obtained, the formed double-faced adhesive tape layer is attached to the double-faced adhesive tape and the graphene heat dissipation layer in an opposite mode, and the graphene heat dissipation structure is obtained. The width of the covered edge structure is increased, the stress dispersion performance of the covered edge structure is enhanced, the waterproof performance is improved, the covered edge layering phenomenon is avoided, the heat dissipation performance of the graphene heat dissipation layer is guaranteed, the overall structure stability is improved, and the service life is prolonged.

The utility model provides a sealing structure, a container and a vehicle, the sealing structure comprises a sealing strip, and the sealing strip is provided with a mounting part, a bubble tube part and a supporting part arranged between the mounting part and the bubble tube part. The installation part is used for being installed on one of a cabinet body and a cabinet door, a cavity is formed in the supporting part, a magnetic attraction piece is arranged in the cavity, the cavity extends in the length direction of the sealing strip, the magnetic attraction piece is used for attracting the other one of the cabinet body and the cabinet door, and the bubble pipe part abuts against the other one of the cabinet body and the cabinet door. According to the sealing structure, the installation part, the supporting part and the bubble pipe part are sequentially arranged on the sealing strip, so that the installation part is extruded to generate elastic deformation, and extrusion force is transmitted to the supporting part; the supporting part can transmit extrusion force, the magnetic attraction part can be connected with the cabinet body or the cabinet door, it is guaranteed that the bubble pipe part is subjected to sufficient extrusion force, and therefore the sealing effect of the sealing structure on the cabinet door and the cabinet body can be effectively guaranteed.

The invention discloses a semiconductor device, a preparation method, a power module, a power conversion circuit and a vehicle. The device comprises a first wafer structure and a second wafer structure, the first wafer structure comprises a first surface and a second surface which are oppositely arranged, the second wafer structure comprises a third surface and a fourth surface which are oppositely arranged, and the second surface and the third surface are bonded; the first wafer structure comprises a first region arranged on the first surface and a well region arranged on the side, away from the first surface, of the first region, the first surface is provided with a first groove extending into the first wafer structure from the first surface, and the second wafer structure comprises a second region arranged on the third surface; the orthographic projection of the second area on the fourth surface is at least partially overlapped with the orthographic projection of the first groove on the fourth surface; the grid electrode is located in the first groove; the drain is located on the fourth surface; the source is located on the first surface. The specific on-resistance of the semiconductor device is reduced, and the anti-pressure capability of the semiconductor device is improved.

The utility model discloses a steel wire rope simple lifting garage with a middle cantilever, which comprises a rack, a steel wire rope driver, a lifting steel wire rope, a reversing pulley assembly, an upper-layer car carrying plate, a telescopic lifting assembly and a hinge pull rod, the telescopic lifting assembly is connected with a hinge pull rod, the hinge pull rod is connected with the middle of an upper-layer car carrying plate, one end of the upper-layer car carrying plate is connected with the rack, and the front end, the rear end and the top face of the rack, the steel wire rope drive and the telescopic lifting assembly are each provided with a reversing pulley assembly. The two ends of the lifting steel wire rope are fixed to the rack and the steel wire rope drive respectively, and the middle is wound around the reversing pulley assemblies respectively. The motor is used for directly driving the steel wire rope reel, the steel wire rope is combined with the reversing pulley, safe lifting of the vehicle carrying plate is achieved, the occupied left and right net space size is small, and the width of the vehicle carrying plate in a limited space is increased.

The invention discloses a high-temperature oxidation resistant coating as well as a use method and application thereof. The solute of the coating comprises 33%-40% of Al2O3, 42%-49% of SiO2, 8%-14% of Fe3O4, 3%-8% of SiC and 5%-7% of (Y2O3 + ZrO2), the proportion of Y2O3 in the (Y2O3 + ZrO2) is 5%-9%, and a solvent is distilled water. When the coating and the using method are applied to homogenization pretreatment of the nickel-based superalloy, the homogenization treatment time of the superalloy in a heat treatment furnace can be effectively prolonged, erosion and oxidation of high-temperature furnace gas to the surface of a steel ingot are avoided, subcutaneous oxidation cracks and element depletion are reduced, and the quality of the steel ingot is improved. And the method has positive influence on the surface grinding efficiency of the homogenized steel ingot, tool loss and other procedures.

The invention discloses a ceramic chopper and a surface treatment method thereof. The method comprises the following steps: molding ceramic powder; sintering and curing; obtaining a prototype of the ceramic chopper; carrying out surface treatment processing; performing ultrasonic cleaning; performing spin-drying; drawing design is conducted, specifically, a drawing is guided into a laser machine, and technological parameters of the laser machine are set; the ceramic chopper is machined through a laser machine according to the drawing, and a desired shape is manufactured; performing ultrasonic cleaning; and performing heat treatment. According to the invention, the width of the protruding peak is increased by adjusting the distance between the drawings, and the strength and wear resistance of the peak are improved, so that the position can keep stable shape in the frequent transverse friction process of contact with a chip during application, the problems of breakage and the like are not easy to generate, and frequent failure of an application end is not caused; the ceramic chopper is additionally provided with countless protruding peaks and reinforcing ribs, the connectivity of all positions is enhanced, the ceramic chopper is slower in abrasion, less in breakage and higher in stability in the application process, and the service life can be prolonged by more than one time.

The utility model relates to the technical field of maintenance and test platforms, in particular to an aircraft crew seat maintenance and test platform, which comprises a worktable in an inverted I-shaped design. A moving mechanism is installed at the bottom of the workbench, a sliding groove is formed in the left side of the upper side of the workbench, and a fixing block is installed in the middle of the interior of the sliding groove; mounting holes are formed in the left sides of the front side and the rear side of the workbench; a stretching mechanism is mounted in the sliding groove; a pressing mechanism is installed on the right side of the upper side of the workbench and used for pressing the cushion. According to the pressing mechanism, when the pressing mechanism is used, the movable plate moves upwards or downwards and is fixed through the second bolt, so that cushions with different heights can be fixed, and follow-up maintenance of a seat is facilitated.

The invention provides a semiconductor device and a manufacturing method thereof, the semiconductor device comprises a semiconductor layer and a trench gate, the semiconductor layer has a first surface and a second surface opposite to each other, the trench gate is located in a trench of the first surface of the semiconductor layer, and the semiconductor layer comprises a first buried layer located at the bottom of the trench gate and connected with the trench gate; the body region is connected with the side wall of the trench gate; the source region is connected with the side wall of the trench gate, and the source region extends from the first surface to the body region and is connected with the body region; at least part of the drift region is located between the body region and the second surface and connected with the first buried layer and the body region, the width of the trench gate is not smaller than the depth of the trench gate, and the width of the trench gate is larger than the width of the first buried layer. By widening the width of the trench gate and arranging the narrower buried layer at the bottom of the trench gate, the barrier of the buried layer to the flow of current carriers is reduced, and the overall voltage endurance capability of the device is improved.

The utility model discloses a node connecting structure of a refrigeration house roof and a photovoltaic stand column, which comprises a heat insulation fixing unit used for fixing the photovoltaic stand column and a waterproof unit arranged on the heat insulation fixing unit, and the heat insulation fixing unit comprises a mounting groove formed in the refrigeration house roof, a column foot fixed on the bottom wall of the mounting groove and a heat insulation block. The lower part of the photovoltaic stand column is fixed on the column foot; the groove wall and the bottom wall of the mounting groove are both coated with first waterproof coatings, and the upper portion of the heat insulation block extends upwards to the position above the roof and is connected with the roof. The installation grooves are dug in the roof of the refrigeration house and filled with the heat insulation blocks, the photovoltaic stand columns are wrapped with the heat insulation blocks, the heat bridge effect can be effectively avoided, and the influence of a photovoltaic system on the refrigeration house is reduced as much as possible; first waterproof coatings are arranged in the mounting grooves, and waterproof units are further arranged on the heat insulation blocks and the roof, so that the waterproof performance of the joints can be effectively guaranteed, and water leakage of the refrigeration house is avoided; as the stand columns are buried in the refrigeration house roof, waterproof parts on the refrigeration house roof can be replaced conveniently.