390results about How to "Reduce processing costs" patented technology

The application belongs to the technical field of polymer material recycling, and particularly relates to a high-efficiency enzymatic hydrolysis process of polycaprolactam. The high-efficiency enzymatic hydrolysis process of polycaprolactam provided by the application comprises the steps of acid pretreatment, enzymatic catalytic depolymerization and product post-treatment. The process combines sulfuric acid and a multi-enzyme system to treat PA6 with high substrate concentration. The physical form and chemical accessibility of PA6 are significantly changed through sulfuric acid pretreatment, which creates conditions for subsequent enzymatic hydrolysis reaction, and realizes efficient, deep and green degradation of PA6.

This invention discloses a highly efficient asymmetric synthesis method for aryl propionic acid drug molecules. The method uses racemic aldehydes as substrates and thiamine pyrophosphate-dependent enzymes as biocatalysts. Electrolysis is performed in a diaphragm-free electrolytic cell under conditions of an external redox dielectric and constant current, in a buffer salt solution and nitrogen atmosphere. This method achieves dynamic kinetic oxidation of aldehydes via bioelectrocatalysis, enabling the high-efficiency and high enantioselectivity synthesis of aryl propionic acid drug molecules. The method eliminates the need for redox agents and additives, is simple to operate, operates under mild reaction conditions, and is green and sustainable. This invention applies bioelectrocatalysis to asymmetric synthesis, providing a green and efficient new enzymatic synthetic route for the asymmetric synthesis of aryl propionic acid drug molecules, which has significant application prospects in the pharmaceutical industry.

The application provides a photoresist waste liquid recycling device and process, by adding hydrochloric acid to the photoresist waste liquid in the acidification precipitation tank in the pretreatment module to adjust the pH value, the linear phenolic resin precipitation rate reaches more than 95%, and the linear phenolic resin can be used again to the production stage of the photoresist after centrifugal separation, a compound coagulant containing sulfide and polyaluminum chloride is added to the heavy metal capture tank in the pretreatment module, and the removal rate of heavy metal ions reaches 99.5%; then the photoresist fragments are separated by using an ultrafiltration device, and the diatomite modified by NaOH and polyetherimide is used for adsorption and decolorization, then two-stage vacuum distillation process is used to realize the recovery of high-purity solvents in the photoresist waste liquid, finally, the remaining residue is polymerized and cured by ultraviolet radiation, and the solid fuel with high heat value can also be prepared, so that the 'zero emission' and resource full recovery of the photoresist waste liquid are realized, and the treatment cost and environmental risk are significantly reduced.

This utility model provides a car roof handle and vehicle based on a four-bar linkage, belonging to the field of automotive parts technology. It includes: a base with a proximal hinge and a distal hinge, located at different positions along the depth of the base; one end of a first rocker arm hinged to the proximal hinge of the base, and the other end of the first rocker arm hinged to a connecting arm; one end of a second rocker arm hinged to the distal hinge of the base, and the other end of the second rocker arm hinged to a connecting arm; the connecting arm is hinged to the handle body. The first rocker arm, the second rocker arm, the connecting arm, and the base constitute a four-bar linkage. The advantages of this utility model are: the four-bar linkage allows for extension and retraction between the handle body and the base, enabling the handle body to be retracted and close to the base when not in use, and extended when in use, saving interior space and adapting well to bumpy driving environments.

This utility model discloses a silencer for refrigeration pipelines, including a medium inlet pipe and a medium outlet pipe, with a silencer section provided between the medium inlet pipe and the medium outlet pipe. The outer diameter of the silencer section is larger than the outer diameter of the medium outlet pipe. Therefore, when a high-speed flowing medium suddenly passes behind the silencer section, the flow rate of the medium is slowed down due to the increased space, thus absorbing or reflecting sound energy and reducing noise propagation, which can indirectly improve system reliability and energy efficiency. Simultaneously, since a plug is provided at the end of the medium outlet pipe facing the medium inlet pipe, the plug can be used to promote medium backflow and slow down the flow rate. In particular, a circular hole is provided on the outer circumference of the medium outlet pipe, allowing the flowing medium to enter the medium outlet pipe through the circular hole, ensuring smooth flow of the medium. The medium can be a liquid refrigerant, a gaseous refrigerant, or a gas-liquid mixture refrigerant.

The utility model discloses a solenoid valve driver, including socket combination - shell assembly and the circuit board - shell cover assembly that is connected with socket combination - shell assembly through shell cover screw (31), socket combination - shell assembly includes shell (1) and the socket combination (2) that is connected with shell (1), socket combination (2) includes socket (21), the plug (22) that is connected with socket (21), pin (23), socket screw (24) for fixing socket (21) on shell (1) and set up between socket (21) and shell (1) O ring (25), the circuit board - shell cover assembly includes the shell cover (3) that is connected with socket combination - shell assembly, sets up the circuit board (4) of shell cover (3) near shell one side and sets up cable (5) on the other side of shell cover (3). The utility model provides a solenoid valve driver can reach better sealing stability.

The utility model relates to workpiece processing field, specifically disclose a kind of thread rolling feeding and discharging equipment, including installation box, still include: the first workpiece mobile placement unit of being able to extend into processing position;Second workpiece mobile placement unit can extend into processing position, first workpiece mobile placement unit and second workpiece mobile placement unit can be horizontally slid and installed on installation box;First manipulator can take and place workpiece, first manipulator can be opposite with the first workpiece mobile placement unit or second workpiece mobile placement unit located outside processing position;Second manipulator can take and place workpiece, second manipulator can be opposite with the first workpiece mobile placement unit or second workpiece mobile placement unit located outside processing position.In the scheme, first workpiece mobile placement unit and second workpiece mobile placement unit can be matched with first manipulator and second manipulator, to speed up the taking and placing cycle of workpiece, reduce the time length of single processing beat, reduce processing cost.

The application provides a method for determining the type of defects in a single crystal silicon wafer, comprising the following steps: measuring the particles in the As-Grown state silicon wafer by LST to obtain a first measurement result, and determining a V-rich region according to the first measurement result and a first preset density value; and performing heat treatment on the silicon wafer, and again measuring the particles in the silicon wafer by LST to obtain a second measurement result, and determining a Pv region, an I-rich region and a Pi region according to the second measurement result, a second preset density value and a third preset density value, so as to accurately and effectively distinguish the four region types of the V-rich region, the Pv region, the Pi region and the I-rich region in the single crystal silicon wafer by using the particle density, the test result is obviously distinguished, the test stability is high and the repeatability is high, and the requirement of the defect partition type on the silicon wafer is reduced.

The application discloses a forming method for concave thin plate corrugated stainless steel parts, which comprises die assembling, stamping buffer layer laying, stamping preforming, stamping forming and shearing correction. By using the forming method, the existing punch is used, in the stamping preforming process, the stamping buffer layer is laid, the step-by-step pressing mode is adopted, the stamping buffer layer can control the material flow problem, so that the material uniformity is achieved; in the stamping forming, the die is replaced, and the one-time pressing forming is adopted, which can effectively solve the technical problem that the boundary of the corrugated area is prone to wrinkling, and can improve the forming efficiency, so as to improve the qualified rate of part forming, ensure the product forming quality, greatly reduce the processing cost, and be applied to the processing of the parts prone to wrinkling, and is convenient to operate and suitable for popularization and application.

The application provides a coalescence-adsorption coupled binary hydrophilic-hydrophobic particle deep bed oil removal process and device, and the process comprises the following steps: S1, mixed liquid mixing and adsorption; S2, first coalescence separation of the mixed liquid; S3, second coalescence separation of the mixed liquid; and S4, recycling of emulsified oil containing DOM and adsorbent. The process of the application realizes efficient purification of oil-containing sewage containing DOM and emulsified oil through the steps of adsorbent dispersion mixing and two-stage binary hydrophilic-hydrophobic particle coalescence separation, in combination with a special device; the mixing effect of the adsorbent and the sewage can be strengthened, the DOM adsorption and emulsified oil demulsification efficiency can be improved, the adsorbent recycling and water phase purification can be realized at the same time, and the problems of incomplete treatment and low efficiency of existing oil removal technologies on multi-form pollutants are solved.

The application discloses a green and efficient regeneration method of activated carbon in a brine acidification-activated carbon adsorption deodorization process, and is characterized by comprising the following steps: S1, water washing and salt removal through aeration; S2, ozone oxidation regeneration: adding an alkali liquor with the same volume as the activated carbon into an activated carbon adsorption tower, and then blowing ozone into the bottom of the activated carbon adsorption tower, so that the ozone is subjected to oxidation reaction with the activated carbon under the alkaline condition, and then waste alkali liquor is discharged; S3, water washing and alkali removal through aeration; S4, waste liquid reuse; and S5, waste material reuse. The application can not only avoid the loss of activated carbon caused by high-temperature burning, but also has short regeneration time of the activated carbon and no harmful substance residue, and is very suitable for the regeneration of the activated carbon in the acidification brine activated carbon adsorption deodorization process. In addition, the waste liquid and the waste material in the regeneration process of the activated carbon can be reused, the whole process is free of toxic and harmful waste emission, is green and environment-friendly, has low treatment cost, high efficiency, good economy, environmental protection and feasibility.

The application discloses an aluminum cover forming method and an aluminum cover and relates to the technical field of aluminum cover manufacturing. The aluminum cover forming method comprises the following steps: S1, placing an aluminum plate into an initial forming die, and forming a macro-domain large curved surface in the middle of the aluminum plate and an initial foot position with the same height as a required foot position on the circumferential edge of the aluminum plate through the extrusion force of a press machine and the initial forming die; S2, placing the aluminum plate preliminarily formed in S1 into a final forming die, and further forming the macro-domain large curved surface formed in the middle of the aluminum plate into a final shape at room temperature through the final forming extrusion pressure of the press machine, and flowing and filling the edge cavity of the final forming die to form an edge through the extrusion of the final forming die, and forming a final foot position shape through the extrusion of the initial foot position; and S3, opening the die to take out the formed aluminum cover. The production of the large-size foot position height aluminum cover can be realized at room temperature, the energy consumption is low, and the aluminum cover is simple and convenient to manufacture.

The utility model provides a sheet part punch tapping indexing device, including rotation indexing mechanism, rotation indexing mechanism includes the fixed baseplate of being fixedly connected with drill press concentrically, rotation indexing mechanism still includes rotation baseplate, rotation baseplate concentric indexing rotation relative fixed baseplate, and rotation baseplate drives rotation through the hand wheel drive mechanism of installation in vertical side surface, hand wheel drive mechanism drives rotation baseplate rotation through right angle bevel gear transmission, rotation baseplate concentric fixedly links nut pressure mechanism and drives nut pressure mechanism concentric rotation, and nut pressure mechanism includes support frame, and support frame realizes sheet part synchronous rotation through the concentric pressure fixed installation sheet part of nut and elastic pad. The utility model reduces sheet part punch tapping waste rate to 2%, compact structure, convenient operation, guaranteeing accuracy reduces processing cost at the same time.

The application discloses a three-core UTP cable, a three-core UTP wire harness and a camera module, comprising a differential signal line pair, a ground signal line, a filler and an outer insulation layer, the outer insulation layer wrapping the differential signal line pair, the ground signal line and the filler, and the filler being located between the differential signal line pair, the ground signal line and the outer insulation layer; the differential signal line pair comprises a first differential signal line and a second differential signal line, and the first differential signal line and the second differential signal line are twisted by a double-twisted wire structure; and the differential signal line pair and the ground signal line are arranged at intervals. The application provides a more stable and reliable grounding path, can effectively conduct electrostatic charges, avoids accumulation of static electricity on the camera module, and can effectively solve the ESD failure problem of the camera module based on the UTP wire harness.

This application discloses a method and apparatus for intelligent driving data trajectory repair based on segmented point cloud registration, relating to the field of autonomous driving technology. The method includes the following steps: dividing the data segment to be repaired into multiple smaller data segments; registering each frame of point cloud data in a smaller data segment with the first frame of point cloud data in that smaller data segment to obtain a data segment repaired within the segment; and registering the point cloud data of adjacent data segments repaired within the segment on the time axis to obtain point cloud data repaired between segments. Through partial-to-global joint trajectory correction, data repair can be achieved without relying on additional hardware upgrades or external auxiliary data. This significantly improves global trajectory consistency and repair success rate, efficiently repairing trajectory deviations in existing data, avoiding data resource waste, and adapting to the repair needs of newly added data, thus greatly reducing data processing costs.

The application provides a composite material for sludge dewatering, a preparation method thereof and a sludge dewatering conditioner. The composite material for sludge dewatering comprises magnetic porous carbon and molybdenum disulfide loaded on the magnetic porous carbon, wherein the magnetic porous carbon comprises porous carbon and ferroferric oxide loaded on the porous carbon. The preparation method comprises the following steps: mixing the magnetic porous carbon with a molybdenum source and a sulfur source, and performing a hydrothermal reaction to make the molybdenum source and the sulfur source react to generate molybdenum disulfide; after the reaction is completed, performing solid-liquid separation, collecting the solid product, and calcining the solid product under an inert atmosphere at 350-450 DEG C to obtain the molybdenum disulfide magnetic porous carbon composite material; wherein the magnetic porous carbon comprises porous carbon and ferroferric oxide loaded on the porous carbon; and the composite material for sludge dewatering can construct a molybdenum disulfide magnetic carbon-based composite material with a large specific surface area, high catalytic activity and high universality, and the composite material can improve the sludge dewatering performance.

The utility model discloses a kind of UV coating equipment waste gas treatment devices, the UV coating equipment waste gas treatment device includes: shell, input structure, filter structure, spraying structure and output structure, input structure is set in the side wall of shell top portion;Filter structure is set in the top side one end inside shell;Spraying structure is set in the bottom side one end inside shell;Output structure is set in the side wall of shell bottom portion;Spraying structure includes baffle, several spray heads and first flow guide structure, the side edge of baffle connects the side of first flow guide structure, the other side of first flow guide structure and the remaining side edge of baffle are respectively connected to shell inner wall;Several spray heads are set in the side surface of baffle towards spraying cavity.UV coating equipment waste gas treatment device is separated by setting baffle and first flow guide structure to the treatment area inside shell and guides waste gas flow direction, and the utilization of spraying structure can be effectively improved.

This disclosure relates to the field of titanium extraction technology from blast furnace slag, and particularly to a method for controlling the titanium carbide content using iron oxide powder, comprising the following steps: Step 1, when the slag generated by the carbon-blending of titanium-containing blast furnace slag reaches the smelting endpoint, a sample is taken to detect the mass percentage of titanium carbide in the slag; Step 2, when the mass percentage exceeds a set threshold, iron oxide powder is added to the slag to control the mass percentage within a reference range. This disclosure solves the problem of easy bending of titanium slabs with large aspect ratios during the upsetting process. This disclosure also solves the problem of high TiC content in existing titanium-containing blast furnace slag carbon-blending processes. By adding iron oxide powder to react with excess TiC in a directional manner, the TiC content can be stably controlled within a reference range, effectively reducing slag viscosity, ensuring smooth slag discharge, and avoiding safety hazards such as equipment blockage; at the same time, it improves the temperature control effect of the subsequent boiling chlorination reaction, and improves the efficiency and quality of subsequent titanium resource recovery.

The disclosure discloses a preparation method of a light emitting diode chip, and belongs to the technical field of semiconductors. The preparation method comprises the following steps: growing an epitaxial layer; sequentially depositing a transparent conductive layer and an etching stop layer on one side of the epitaxial layer; patterning the transparent conductive layer and the etching stop layer to expose part of the epitaxial layer; preparing a photoresist layer on the side of the etching stop layer away from the transparent conductive layer, so that the photoresist layer covers part of the etching stop layer; and etching the exposed transparent conductive layer, etching stop layer and epitaxial layer to form a mesa and an isolation trench. The embodiment of the disclosure can simplify the etching process and reduce the process cost.

The application discloses a fungus soup production press, and belongs to the technical field of food processing equipment. The fungus soup production press comprises a rack, a control mechanism, a pressing mechanism, a liquid collecting groove, a support, a basket body and a material loosening mechanism. The rack is arranged vertically in the liquid collecting groove, the support is arranged in the liquid collecting groove, and the basket body is movably installed on the support. The material loosening mechanism comprises a plurality of inclined blocks which are installed on the support and are arranged at intervals. The plurality of inclined blocks can lift the basket body, so that the basket body can intermittently vibrate, and the fungus residue in the basket body can be loosened and dispersed. Therefore, the fungus residue can be conveniently unloaded, time and labor are saved, the staff does not need to dig or pry the compacted fungus residue, the unloading difficulty and the labor intensity of the staff are reduced, the work and production efficiency are improved, the probability of damage of the basket body due to the digging or prying of the fungus residue by the staff is reduced, the service life of the basket body is prolonged, the maintenance frequency is reduced, and the maintenance and processing costs are reduced.

The utility model relates to antenna test technical field, concretely relates to a kind of high-precision antenna test scanning frame horizontal shaft, guide slide rail and multiple horizontal sections that are connected in order, the structure of scanning frame horizontal shaft is optimized, so that guide slide rail can be connected with multiple horizontal sections that are spliced in order, so that the high-precision machining equipment of existing can carry out high-precision machining to horizontal section and docking reference structure, to ensure the precision of multiple horizontal sections that are connected in order, while ensuring the precision of connection between guide rail, realize the high-precision machining demand of scanning frame horizontal shaft of different length, simple structure meets the machining and detection precision requirement of large, super large scanning frame horizontal shaft, reduce machining difficulty and machining cost, convenient dismounting and transportation, while it can realize the high-precision use demand of scanning frame horizontal shaft, improve production efficiency, ensure that antenna detection is accurate and reliable.

The application provides a Mo and K co-doped MnO2 catalyst, which is obtained by doping Mo and K in alpha-MnO2 nanowires, and Mo and K are uniformly distributed on the surface and tunnel structure of the alpha-MnO2 nanowires, and the catalyst has a hydroxyl functional group. The application also provides a preparation method of the catalyst, and a method for degrading pollutants by activating peracetic acid with the catalyst, wherein peracetic acid and the catalyst are added into wastewater containing organic pollutants under stirring, and the pH value of the wastewater is controlled to be 5-9; in the wastewater treatment process, the catalyst activates the peracetic acid to generate organic free radicals and singlet oxygen to degrade the organic pollutants in the wastewater. The application can improve the ability of the MnO2-based catalyst to activate peracetic acid to generate active species to degrade organic pollutants, and solves the problems that the existing MnO2-based catalyst has low ability to activate peracetic acid and poor degradation ability for organic pollutants.

The utility model relates to a sealing structure technical field of crushing equipment, concretely relates to an oil gas sealing structure for airflow mill grading and mechanical crushing grading, aims at solving the problem that the sealing structure is affected by particle and leads to poor sealing effect. Including spindle and bearing seat, and the bearing piece, oil baffle, elastic baffle, bearing cover and sealing ring that are coaxially assembled with the spindle, still include labyrinth ring, the air passage is opened in the labyrinth ring, and the air inlet pipe is connected on the bearing seat, and the air inlet pipe is communicated with the air passage. The labyrinth ring is assembled in the bearing seat end portion and prevents the particle from entering the sealing structure, and the air passage is opened in the labyrinth ring, and the gas is injected into the air passage, prevents the dust particle from entering the sealing gap, thereby reduces the erosion and pollution of the particle to the bearing piece and sealing structure.

This utility model discloses a wastewater treatment dosing device, including a delivery pump. One end of the delivery pump is connected to a speed regulating device, which includes a delivery pipe, a speed regulating sleeve, a matching rod, a matching sleeve, a connecting sleeve, a thrust bearing, a movable sleeve, a speed regulating block, a speed regulating plate, and a speed regulating groove. The matching rod is located inside the speed regulating sleeve, and the matching sleeve is located in the movable sleeve. The connecting sleeve and the movable sleeve are installed on both sides of the thrust bearing. The outer wall of the movable sleeve is threaded to the inner wall of the delivery pipe. The speed regulating block is installed on one side of the speed regulating plate. The speed regulating groove is inclinedly opened inside the delivery pipe. A locking mechanism is provided on the outside of the delivery pipe. The locking mechanism includes a control sleeve, a screw sleeve, a driving wheel, a screw, a driven wheel, a shift block, a fixed block, a shift spring, and a shift sleeve. The screw sleeve is sleeved on the outside of the screw and installed on one side of the driven wheel. The driving wheel is installed on one side of the control sleeve. The shift spring is connected to two adjacent shift blocks. This utility model solves the defects of low drug delivery accuracy and poor stability of the regulating system.

This invention discloses a low-scattering carrier for testing the forward traveling wave (RCS) of absorbing materials, belonging to the field of low-scattering carrier shape design. It includes a carrier body composed of an upper surface, a lower surface, and two side surfaces. The upper and lower surfaces are seamlessly connected in the shapes of a triangle, a special trapezoid, and a rectangle, respectively. The two sides of the special trapezoid are convex arcs, and the two side edges of the triangle are connected to the corresponding side edges of the rectangle via corresponding convex arcs, forming a concave second-order curved surface. The vertices formed by the two side edges of the triangle on the upper and lower surfaces together serve as the forward tip of the carrier body, and the rectangular base edges of the upper and lower surfaces seamlessly overlap. The absorbing material to be tested is placed on the rectangular surfaces of the upper and lower surfaces. This invention can improve the accuracy of evaluating the RCS reduction performance of absorbing materials at different pitch angles.

The application discloses a preparation method of triclabendazole, and relates to the technical field of raw medicine synthesis. The method comprises the following steps: taking 4-chloro-5-(2,3-dichlorophenoxy)-2-nitroaniline as raw material, and sequentially performing reduction in an iron powder ethanol system, ring closure with a sulfur-containing ring closure reagent, methylation with dimethyl sulfate, and crystallization and purification in ethanol to obtain triclabendazole finished products. In the reaction process, iron mud is removed through pressure filtration, ethanol is recovered through distillation, and the ring closure intermediate is precipitated under acidic conditions. The process condition is clear, the operation is simple, the emission of hazardous waste can be reduced, the utilization rate of solvents and the purity of products can be improved, and the method is suitable for industrialized production of triclabendazole raw medicine.

This invention discloses an environmentally friendly plasticizer using modified lignin as a carrier, a rubber composition, and a method for preparing the same, relating to the field of rubber processing technology. The environmentally friendly plasticizer using modified lignin as a carrier, by weight, comprises the following components: 50 parts modified lignin, 25 parts plasticizing active ingredient, 8 parts dispersant, 5 parts anti-aging agent, and 3 parts stabilizer. The modified lignin is a lignin oligomer containing ester, acetyl, and ether cross-linked structures, with a weight-average molecular weight of 800-1200 Da, a dispersion coefficient ≤1.5, and a carboxyl content ≤0.2 mmol / g. This invention successfully overcomes the technical defects of existing plasticizer carriers, such as high toxicity, difficulty in degradation, and poor compatibility with polymer matrices, providing an environmentally friendly plasticizer using modified lignin as a carrier. This technical solution achieves the dual goals of high-value utilization of lignin and greening of the plasticizer product.

The application provides a hierarchical atomization oil flinger and an engine, and belongs to the technical field of power machinery. The hierarchical atomization oil flinger comprises an oil supply assembly and a disc body. The outer side of the ring cavity of the oil supply assembly is provided with a jet hole. The disc body is rotatably sleeved on the outer side of the ring cavity. The radial recess cavity of the disc body is divided into two oil collecting cavities by a shunt protrusion. The oil collecting cavities are provided with a plurality of oil injection holes. The jet hole is located in the radial projection area of one of the oil collecting cavities. In use, after the ring cavity is filled with fuel, the fuel is injected into one of the oil collecting cavities from the circumferential jet hole. When the rotating speed of the disc body is low, the fuel cannot fill the oil collecting cavity and is sprayed out through the oil injection hole of the oil collecting cavity, that is, single-stage atomization. When the rotating speed of the disc body is high, the fuel fills the oil collecting cavity and overflows, spreads over the shunt protrusion, and enters the other oil collecting cavity. The oil injection holes of the two oil collecting cavities start to work, and double-stage atomization is realized. The hierarchical atomization oil flinger provided by the application solves the problem that the oil flinger in the prior art has a single fuel atomization effect.

This invention relates to the field of quartz wafer manufacturing technology, and discloses a laser-induced etching process for quartz wafers and a quartz device. A hard mask is used to form a high-frequency (thin wafer), and laser-induced etching is employed to form the wafer outline. The quartz wafer processing can be completed in a single deposition and photolithography process, avoiding the multiple depositions of precious metal Au films required in photolithography, thus minimizing the amount of Au used and significantly reducing processing costs. Furthermore, quartz wafers processed using this process exhibit good side perpendicularity, high dimensional accuracy, and high quality and stability.

This utility model provides a cooking utensil, comprising: a pot body with a plurality of pot teeth spaced apart, one of which is a limiting tooth, the outer surface of which includes a protruding limiting surface; and a lid, which is closable and can be locked onto the pot body, engaging with the limiting tooth. The lid has a stop-opening element; when the lid is locked with the limiting tooth and the cooking utensil is under pressure, the stop-opening element interferes with the protruding limiting surface to lock the lid onto the pot body. The design of this application effectively solves the problem in related technologies where the inclusion of limiting holes and limiting protrusions increases processing steps and leads to higher processing costs.