28results about How to "Guaranteed duration" patented technology

The present invention discloses a temporary support and construction method for a cross-sea cable-stayed bridge. The cross-sea cable-stayed bridge comprises piers and steel-concrete composite beams, wherein the piers comprise main tower piers, auxiliary piers and side piers, wherein the main tower piers, the auxiliary piers and the side piers are distributed along the bridge direction, and the temporary support of the cross-sea cable-stayed bridge comprises: a pier-side support group, wherein the pier-side support group is arranged along the outer edge of the main tower pier; an auxiliary support, wherein the auxiliary support is arranged on the auxiliary pier; a temporary pier group, wherein the temporary pier group is arranged on the outer side of the pier-side support group; and a slideway assembly, wherein the slideway assembly is arranged on the pier-side support group, and the slideway assembly is used to drag the steel beam of the cable-free beam section of the tower area. The present invention utilizes the pier-side support group, the auxiliary support and the temporary pier group to ensure the stability of the steel beam during the installation process, thereby reducing the difficulty of the steel beam construction of the cross-sea cable-stayed bridge, and while ensuring the construction quality of the steel beam, the installation and construction efficiency of the steel beam is higher, thereby ensuring the construction period.

The utility model relates to an auxiliary tool for cement paste consolidation wear-resistant pipe construction in drilling engineering, and belongs to the technical field of engineering construction. Comprising a guider and a pipe hoop, the head of the guider is conical and can be inserted into a guide hole reserved in the well bottom, the tail of the guider is connected with the pipe hoop, the pipe hoop is connected with a buoyancy valve, and a slurry return hole is formed in the guider. The pipe hoop and the buoyancy valve are matched for operation, and an inner screw buckle on the pipe hoop and an outer screw opening in the bottom of the buoyancy valve are installed. The utility model has the benefits that the buoyancy valve is protected to work normally, and the lifting weight upper limit of the steel wire rope is increased; sediment at the bottom of the hole is prevented from blocking a piston hole of the buoyancy valve, and cement paste is smoothly ejected to the outside of the pipe by pressure and filled in a gap between the pipe and a hole wall; the unique design shape, size and appearance ensure the verticality requirement of wear-resistant pipe installation. The well cementation safety is ensured, the construction quality, the construction period and the economic benefits are also ensured, and well cementation accidents are prevented.

The present invention provides a bridge construction method and an external beam device, comprising the following steps: S1: constructing the cable area and the non-cable area of ​​the segment; S2: constructing the segment in the cable area by the delayed tensioning method of the cable-stayed cable; S3: constructing the segment in the cable-stayed area in parallel and realizing the interval setting of the longitudinal prestress. It includes a reserved groove structure located on the segment and a stress frame structure detachably arranged on the reserved groove structure; adjacent segments are respectively provided with reserved groove structures, and the two ends of the stress frame structure are respectively fixed in the corresponding reserved groove structures to realize the connection of adjacent segments. It solves the problem of long construction period of the existing low-tower cable-stayed bridge. A bridge construction method and an external beam device of the present invention adopt the delayed tensioning construction method of the cable-stayed cable. The construction of the cable-stayed cable in this segment is parallel to the construction of the segment reinforcement and formwork of the next segment, and the construction of the cable-stayed cable is eliminated from the key line of the segment construction. It is conservatively estimated that each segment saves 2 days.

The utility model discloses a detachable simple underground water level observation device which is used for detecting the water level of underground water and comprises a shell structure and a detection structure, the detection structure is arranged on the shell structure and used for detecting the water level of the underground water, and the shell structure comprises a pointed-cone-shaped end and a filter pipe body arranged on the pointed-cone-shaped end. The extension pipe body is arranged on the filter pipe body, the measuring pipe body is arranged on the extension pipe body, and the shell structure is used for enabling the device to go deep into the ground. The detachable simple underground water level observation device is convenient to machine, few in device components, low in cost, easy and convenient to construct and capable of accurately observing underground water level changes in a foundation construction area at any time, so that the formal construction time of foundation engineering is determined; the problem that the water content, the compactness and the bearing capacity of the bearing layer of the foundation cannot meet the design requirements due to the fact that precipitation is not in place is solved, and the construction period of a project is guaranteed.

The utility model relates to a hinge connection structure of flange-extending rectangular pipes and rectangular pipes. The hinge connection structure for the flange-extended rectangular pipe and the rectangular pipe comprises a connecting seat, two extension plates, a large-diameter stud and two mounting nuts, the connecting seat is arranged at the belly part of the rectangular pipe with the outwards-extending flanges and comprises two vertical plates which are symmetrically arranged; the vertical plate is axially arranged perpendicular to the flange extending rectangular pipe and is provided with a through hole A; the extension plates are symmetrically arranged at the ends of the rectangular pipe and provided with second through holes matched with the first through holes. The stud penetrates through the through hole A and the through hole B; and the end part of the stud is in threaded fit with the mounting nut. According to the utility model, only one large-diameter stud is used for enabling the rectangular pipes with the overhanging flanges to be in a hinged connection relationship, so that the connection difficulty of the rectangular pipes with the overhanging flanges can be reduced, the on-site repair is avoided, the construction period is guaranteed, and the construction cost is reduced.

An automatic cable laying device relates to the technical field of cable laying and comprises a frame, the bottom of the frame is provided with a walking mechanism, and the walking mechanism drives the frame to walk along the cable laying direction; the top of the frame is provided with a cable laying mechanism, and the cable laying mechanism is used for laying a cable in the cable laying direction. The bottom of the frame is provided with a cable binding mechanism, and the cable binding mechanism is used for binding the laid cable. According to the utility model, the problems of long cable laying time, low efficiency and large manpower resource consumption caused by the fact that cables on various devices and facilities are manually and directly pulled and released by installation personnel in the traditional technology are solved; and when the cable is laid, climbing is needed, the field environment is complex, the efficiency of manual installation is low, and certain safety risks also exist.

The utility model belongs to the technical field of support assemblies, and particularly relates to a support assembly capable of improving the lubricating effect for a fryer motor, which comprises a support, a lubricating ring is arranged in the support, an oil bearing is arranged in the lubricating ring, an elastic piece is arranged at the top of the oil bearing, a bearing box is arranged at the head of the elastic piece, and a bearing is arranged in the bearing box. Felt is arranged between the lubricating ring and the elastic piece. According to the utility model, the felt is arranged between the lubricating ring and the elastic sheet, the lubricating ring is arranged at the center of the lubricating ring, and then the bearing box covers the surface of the elastic sheet, so that the bearing box can prevent lubricating oil in the lubricating ring and the elastic sheet from overflowing, and meanwhile, the felt can keep the duration of the lubricating oil; therefore, the purpose of improving the lubricating effect is achieved, and the support can be installed on the fryer motor for a longer time.

The invention relates to the technical field of waste oil product pipeline cleaning, in particular to an oil-based-semi-water-based oil product pipeline cleaning agent as well as a preparation method and application thereof. The cleaning agent comprises an oil-based component and a semi-water-based component, the oil-based component comprises butyl cellosolve, methyl phenetole and solvent oil, and the semi-water-based component comprises butyl cellosolve, triethanolamine, sodium dodecyl benzene sulfonate, polyoxyethylene sorbitan monostearate, polypropylene glycol and water. The cleaning agent has good wax dissolving efficiency, and can be used for thoroughly cleaning waste oil pipelines with serious wax precipitation and compact wax layers; the paint does not contain dangerous components and toxic components, is non-corrosive and low in volatility, and has a good environment-friendly effect; the waste oil pipeline can be reused, safety accidents and environmental pollution accidents caused by waste pipeline disposal are avoided, and therefore economic losses of enterprises are effectively reduced.

The invention discloses a seabed efficient installation construction method and device for a large-length ultrahigh-pressure submarine cable, and belongs to the technical field of seabed submarine cable installation construction. S2, routing sea sweeping; s3, laying the starting end of the submarine cable on the side of the offshore wind turbine generator; s4, putting a burying machine; s5, laying and burying submarine cables; s6, recycling the burying machine; and S7, laying the submarine cable terminal at the offshore booster station side. According to the method, routing sea sweeping is carried out before construction, weather conditions are concerned, construction obstacles are removed in advance, smooth construction can be ensured, the construction period is ensured, and the construction efficiency is improved. During laying construction of the starting end of the submarine cable on the side of the offshore wind turbine generator, the barb type submarine cable protection sleeve is additionally arranged at the submarine cable inlet in the wall of the tower drum, a good protection effect on the submarine cable is achieved, and particularly, the traction head and the barb type submarine cable protection sleeve are connected in a self-breaking screw connection mode; the barb type submarine cable protection sleeve is installed on a construction ship in advance, the barb type submarine cable protection sleeve is automatically clamped into a submarine cable inlet, and therefore the problems that the installation time is long and the labor intensity is large when a diver carries out underwater installation are solved.

The present invention discloses a method for constructing a cable-free beam section in a tower area of ​​a cross-sea cable-stayed bridge. The cross-sea cable-stayed bridge comprises a main tower pier and a pier-side bracket, and the pier-side bracket has an initial position. The method comprises: at the initial position, assembling the first beam section, the tower middle beam section, and the second beam section respectively by beam section; dragging and translating the first beam section, the tower middle beam section, and the second beam section to a first preset position by beam section; assembling the third beam section and the fourth beam section at the initial position; assembling the first beam section, the tower middle beam section, the second beam section, the third beam section, and the fourth beam section to form a beam section as a whole; lifting the beam section as a whole, and dropping the beam to install it to form the cable-free beam section in the tower area. The present invention reduces the construction difficulty by dividing the cable-free beam section in the tower area into a plurality of beam sections, and constructing each beam section by beam section, which is more conducive to controlling the construction period of the cable-free beam section in the tower area, improving the construction efficiency, and ensuring the construction period.

The utility model belongs to the technical field of transportation tools, and particularly relates to an efficient floor material transfer device which comprises a movable transportation frame, a material stacking frame and a lifting mechanism, at least one set of detachable placing mechanism is arranged on the transportation frame, the material stacking frame is placed on the placing mechanism, and the lifting mechanism is fixedly installed at the top of the transportation frame. A lifting cross beam is installed at the lower end of the lifting mechanism and inserted into the top of the stacking frame, and the lifting cross beam is pulled through the lifting mechanism to drive the stacking frame to move in the vertical direction. Materials are lifted to the transportation frame through the lifting mechanism and then are horizontally transported, the time for fixing, lifting and falling the materials is short, the floor material transportation efficiency is greatly improved, the material transportation time is shortened, and the construction period is guaranteed; the transportation frame is made of common materials, local materials are used, and environmental protection is achieved. Compared with a traditional method, the number of operators is controlled to be two or less, the floor material transportation efficiency is improved, meanwhile, labor input is reduced, and economic benefits are obvious.

The invention relates to the technical field of machining, in particular to a repairing method for local cylinder shrinkage of a middle cylinder of a hydraulic stand column, and mainly solves the technical problems that the cost is increased and the construction period is delayed in a product scrapping treatment mode when an existing middle cylinder of the hydraulic stand column has machining defects. The repairing method for local cylinder shrinkage of the middle cylinder of the hydraulic stand column comprises the steps that S1, the cylinder barrel wall thickness and the cylinder barrel outer wall material of the cylinder shrinkage part of a product are determined; s2, layered girth welding is conducted on the outer wall of the cylinder barrel corresponding to the cylinder shrinkage part of the product through a surfacing welding technology, and the number of layers of layered girth welding is determined according to the target shrinkage amount of the inner wall of the cylinder barrel; s3, cooling; s4, detecting the size of the inner wall of the cylinder barrel at the cylinder shrinkage part of the product; and S5, the inner wall and the outer wall of the cylinder barrel are machined till the size requirement of a finished product is met. Compared with an existing scrap treatment mode, the method has the advantages that the raw material cost, the equipment cost and the labor cost can be saved, meanwhile, the repairing time is far shorter than that of re-feeding processing, and therefore the construction period can be guaranteed.

The utility model belongs to the field of building engineering, concretely relates to a kind of converter station firewall frame body fixing device.aims at solving the problem that firewall construction frame body is not fixed in prior art, and pre-buried steel pipe method is not applicable.The utility model includes: fastening screw rod, fixed plate, steel pipe and fastener;One end of the fastening screw rod is fixedly connected with one end of the steel pipe;The other end of the fastening screw rod passes through the hole of the preset fireproof wall, and is fixed on the fireproof wall by the fixed plate and fastener;The other end of the steel pipe is detachably connected with construction frame body by the fastener.The utility model makes construction frame body not be influenced by load, concrete pouring and vibrating, so as to ensure the strength and safety of frame body, and reduce safety hazard.

The utility model discloses a sand gravel filling dam face rolling device which comprises a water sprinkling mechanism for sprinkling water to a dam face, a rolling mechanism for rolling the dam face and a power mechanism for providing power for the rolling mechanism, and the rolling mechanism and the power mechanism are both installed on the water sprinkling mechanism. The rolling compaction mechanism, the power mechanism and the water sprinkling mechanism which are connected into a whole are arranged for rolling compaction of the dam face of the sand gravel filling dam, the problem of water sprinkling is solved while rolling compaction is conducted, no water sprinkling equipment needs to be additionally arranged, the problem that the progress is slow due to the mode that an excavator is provided with a tamping plate can be solved, and the construction efficiency is improved. And the construction efficiency is high, few materials and equipment are input, the device is simple and easy to operate, the construction cost is reduced, the construction period is guaranteed, and manpower is saved.

The present invention discloses an elastic long sleeper ballast for urban rail transit, with double-sided drainage ditches arranged on both sides of the ballast, and a drainage pipe buried inside the ballast in the middle of the ballast. Vibration-damping pads are installed on both sides of the bottom of the prestressed concrete long sleeper, a low-rigidity pad is installed in the middle of the bottom of the long sleeper, and isolation pads are installed around the sides of the long sleeper; an anti-debris filter block structure is arranged on both sides of the middle of the long sleeper to prevent debris from entering, and the contact range between the top of the drainage pipe and the bottom of the long sleeper and the contact range between the top of the drainage pipe and the bottom of the anti-debris filter block is cut off. Inspection wells are arranged at intervals in the center of the ballast, and the inspection wells are connected to the buried drainage pipes. The present invention can solve the technical problems of the poor flatness and patency of the evacuation surface of the traditional elastic long sleeper ballast with a central open ditch, the complex ditch forming template, the smoothness and stability of the track structure being greatly affected by construction factors, the weakening of the overall strength of the ballast structure, and the impact of local mold running on the vibration reduction performance.

The present invention discloses a modularly assembled mobile soundproof cover for a construction site, and relates to the technical field of noise control for construction. The soundproof cover comprises a double-groove track, wherein the double-groove track is provided with a pair and is arranged in parallel, an outer soundproof cover and an inner soundproof cover are arranged on the top of the double-groove track, and the cross-sections of the outer soundproof cover and the inner soundproof cover are both arched structures, the outer soundproof cover is located outside the inner soundproof cover, the outer soundproof cover is slidably connected to the outer track of the double-groove track, and the inner soundproof cover is slidably connected to the inner track of the double-groove track, and sealing limit strips are arranged at both ends of the outer soundproof cover, and the inner soundproof cover is fixedly connected with convex strips on the surface of one side of the outer soundproof cover and near both ends. This kind of modularly assembled mobile soundproof cover for a construction site solves the problem that the existing sound insulation device is difficult to move and the installation process is complicated, and is convenient for quickly moving the soundproof cover to the construction range, thereby improving the efficiency of installation.

The utility model discloses an anti-pollution device for a climbing frame support and belongs to the technical field of building construction. The anti-pollution device comprises a fixed part, a rotating part and a protective part, the fixing piece comprises an upper fixing assembly and a lower fixing assembly, the upper fixing assembly comprises a first fixing plate, the first fixing plate is connected with a climbing frame guide rail, the width of the first fixing plate is larger than that of the climbing frame guide rail, and plug pin holes are symmetrically formed in the positions exceeding the two sides of the climbing frame guide rail. An L-shaped bolt is arranged in the bolt hole; the lower fixing assembly comprises a second fixing plate; the rotating piece comprises a connecting piece, a connecting pipe and a pipe sleeve; the protection part comprises a sleeve, first steel pipes are welded to the two sides of the sleeve, nuts are welded to the upper portions of the sides, close to the sleeve, of the first steel pipes, and SBS coiled materials are laid on the first steel pipes. The protection assembly is fixed through the fixing piece and the rotating piece and is not prone to falling off, the protection assembly can be directly lifted and installed along with the climbing frame, the protection sealing performance is enhanced, and pollutants are effectively prevented from entering the climbing frame system from the side face.

The present invention proposes a charging device capable of charging an aerosol generating device, the aerosol generating device comprising an airflow channel, a first charging unit, and a first power source, and the charging device comprises: a first shell; a receiving chamber formed by the first shell and used to receive the aerosol generating device; a first heating unit arranged in the receiving chamber and used to generate heat to evaporate condensed liquid in the airflow channel after being connected to the power source. The first heating unit of the charging device generates heat to evaporate condensed liquid in the airflow channel after being connected to the second power source, and the process of cleaning and heating the condensed liquid can be performed synchronously with the charging process of the aerosol generating device, avoiding the user from manually performing the cleaning process, making the cleaning process simple and efficient, providing a better user experience, and avoiding the loss of power of the first power source in the aerosol generating device, effectively ensuring the number and duration of puffs.

The utility model discloses a self-stabilization type floating water taking platform, and belongs to the technical field of water taking equipment. Comprising a grid walking board, buoys, a submersible pump, buoy fixing frames and a hanging bracket, the hanging bracket is fixed below the grid walking board, the height of the hanging bracket is larger than that of the submersible pump, the submersible pump is fixed to the bottom of the hanging bracket, the buoy fixing frames are symmetrically installed at the bottom of the grid walking board, the buoys are placed in the buoy fixing frames, and the buoys and the buoy fixing frames are not fixed. Horizontal movement is restrained through the submersible pump and the hanging bracket, and boat anchors are arranged on the two sides of the grid walking platen. The water taking platform is kept stable through the self weight, the whole water taking platform floats along with the change of the water level to take water, and the problem that water cannot be sucked when the water surface is low is solved. The floating platform is easy to install, and underwater construction is not needed; the investment and the work amount are small, and the construction period is guaranteed.

The present application relates to the technical field of blocking facilities, and discloses a debris flow blocking system convenient to install and use, which comprises at least one blocking dam arranged in a valley in sequence along a flow direction and a monitoring device arranged at a position corresponding to each blocking dam, and the monitoring device is used for monitoring environment information at the blocking dam in real time. An anchor hole corresponding to the position of the blocking dam is preformed on the valley, an anchor rod capable of being inserted into the anchor hole is arranged on the blocking dam, and a positioning device is arranged in the anchor hole. When the hole diameter of the anchor hole is greater than the outer diameter of the anchor rod, the positioning device is used for locking and fixing the anchor rod in the corresponding anchor hole. Through the positioning device additionally arranged in the anchor rod and the anchor hole with a large hole diameter, the installation and positioning of the anchor rod in the anchor hole with a large hole diameter can be conveniently completed, and the installation efficiency and construction period are ensured, and the monitoring device arranged simultaneously can monitor the environment information at the blocking dam in real time when the debris flow occurs, so that the blocking situation of each blocking dam to the debris flow can be known.

The present invention relates to the field of construction engineering technology, and specifically to an overall lifting device and method for a heavy steel truss and a large-diameter aluminum alloy lattice shell structure, comprising the following steps: arranging lifting points and monitoring points; installing lifting equipment facilities and temporary measures of brackets and hoists for a multi-story steel truss structure, assembling the floor steel frame at low altitude on the ground, and installing a lifting device; debugging the lifting equipment as a whole, lifting the lattice shell structure off the ground; lifting the lattice shell structure to near the original design position; slowly lifting the lattice shell structure to the design position of the truss structure; installing the remaining supplementary rods to connect, testing their welding quality, and performing graded synchronous unloading after passing the quality inspection, and the lifting is completed. The heavy steel truss is lifted after being assembled into a whole on the ground platform, which is conducive to ensuring the overall assembly of the heavy truss and avoiding the problem of difficulty in high-altitude assembly and positioning, thereby ensuring the accurate positioning of the steel components of the truss and improving construction efficiency.

The present invention provides a node in-depth design method and system for digital construction based on deep learning, including: obtaining a number of construction projects of this construction and a construction method corresponding to each of the construction projects, constructing corresponding digital construction nodes, constructing a construction model of this construction based on the digital construction nodes, simulating a simulated construction method corresponding to each of the construction methods, performing in-depth analysis on each of the simulated construction methods, allocating a corresponding construction execution method and a construction supervision method to the corresponding simulated construction method according to the analysis results, and constructing a construction plan for this construction using the construction execution method and the construction supervision method. The model can be used to predict the construction results in advance, reasonably organize the construction, avoid rework, and ensure the construction period and quality.

The utility model provides a kind of pipe on-site processing leveling device, it includes pipe support plate, limiting component, coarse adjustment component and fine adjustment component, the limiting component is located on the pipe support plate, for fixing the pipe on the pipe support plate;The coarse adjustment component and the fine adjustment component connect the pipe support plate, respectively for coarse adjustment and fine adjustment the height of the pipe support plate is adjusted.The utility model can keep the both ends of pipe equal height in reprocessing process by the height adjustment of coarse adjustment component and fine adjustment component, ensure the levelness of pipe, avoid the problems such as pipe deformation, uneven cutout, uneven stripping pitch, difficult operation of rolling wax sealing caused by pipe free end too long in prior art, improve the accuracy and quality of reprocessing, ensure the efficiency and construction period of reprocessing;Required production materials can be locally sourced on site, and can be made of waste materials, and can be reused, save resources.

The invention provides a non-preloading sea silt geology prefabricated square pile composite deviation rectifying method. The method comprises the steps that (1) deviation is rectified by adopting a heaped loading method within the deviation range of 300 mm; (2) rectifying the deviation of the engineering pile with the deviation of 300mm-600mm by adopting a pushing and pulling method; and (3) when the deviation is more than 600mm, a pulling and stacking combined deviation correction method is adopted for deviation correction. The prefabricated concrete square pile is subjected to composite deviation rectifying treatment through a stacking method, a pushing method and a pulling method, the engineering cost is greatly reduced, the construction progress is accelerated, and good social benefits and economic benefits are achieved; besides, as long as the square pile has better pile body quality and pile body strength, the pile body is not obviously broken, the slight defect part of the square pile is not at the joint position, and the deviation belongs to the integral deviation of the pile body, the deviation can be corrected according to the construction process, so that the fund can be saved, the construction period can be ensured, and a reference can be provided for projects with similar conditions in the future.

The utility model relates to the field of mechanical installation, in particular to a high-altitude auxiliary high-strength bolt installation tool device. The tool device comprises a lower platform (3), fixed crawling ladders (1) are arranged on the two sides of the lower platform (3), and each fixed crawling ladder (1) comprises handrails on the two sides and steps in the middle. The fixed crawling ladders (1) on the two sides are connected through upper fixing pieces (2). And a platform guardrail (4) is also arranged between the fixed crawling ladders (1) on the two sides. The tool device has the beneficial effects that in the machining and manufacturing process of the tool device, leftover materials stored in production and machining and production equipment existing in a workshop are utilized, and low cost of tool manufacturing is guaranteed. The tool device is designed to have different specifications, is convenient to disassemble and safe to use, greatly reduces the cost of producing corrugated steel plates by companies compared with purchase establishment, and meanwhile, can be arranged and classified in a small range in the machining process, improves the working efficiency, meets the production requirements, guarantees the construction period and improves the product quality.

The utility model relates to a movable bailey structure steel platform which comprises cast-in-place lower cross beams and a plurality of steel platforms, the two cast-in-place lower cross beams are symmetrically arranged, and the steel platforms are arranged between the cast-in-place lower cross beams. The steel platform comprises a steel platform body, lower main beams, distribution beams and checkered plates, the lower main beams are fixedly installed on the two sides of the bottom face of the steel platform body respectively, the distribution beams are evenly distributed on the top face of the steel platform body, and each distribution beam is fixedly installed on the top face of the steel platform body. The checkered plates are fixedly installed on the distribution beams, and the lower main beam abuts against the cast-in-place lower cross beam. According to the utility model, the construction efficiency is greatly improved, the cost is saved, the construction period is ensured, the effect of reducing the cost on the premise of ensuring the safety and the quality is realized, the construction method that large ship machine equipment needs to be equipped for overwater construction in the traditional hydraulic operation is replaced, and the possibility of overwater hydraulic engineering in a land mode is verified.

The utility model relates to the technical field of eggbeater, in particular to an eggbeater with a stirring head convenient to replace, which comprises a base, a stirring head, a stirring head and a stirring head, the base is mounted on the surface of the base; the machine head is connected to the top of the base through a rotating rod; the cavity is formed in the machine head; the protective cover is arranged on the inner side of the cavity; the rack is mounted on the surface of the protective cover; according to the stirring device, the defects in the prior art are overcome, the mounting groove, the spring, the plug pin and the butt joint groove are adopted, the plug pin is separated from the rotating shaft and compresses the spring to move into the mounting groove by pressing the plug pin, and then the connecting rod can be directly taken out of the butt joint groove to replace the stirring head; according to the egg beater, the working time of the egg beater can be timed by a worker through the timer, the running time of the egg beater can be accurately set, and the egg beating duration is ensured to meet the requirement, so that materials with different thicknesses can be obtained through different beating and stirring durations.