535results about How to "Low maintenance and repair costs" patented technology

The invention relates to hot melt glue and a preparation method thereof, and belongs to the technical field of preparation of hot melt glue. The preparation method comprises the following steps of: starting stirring and opening a heat-conduction oil heating valve; sequentially filling ethylene-vinyl acetate (EVA) resin, a filler, a wax diluents and an antioxygen according to the proportion into a reaction kettle for heating; totally melting each component; adding tackified resin to heat until the tackified resin is totally melted; vacuumizing a reaction system until the reaction system has no bubbles; adding a filter screen and discharging at a discharging port of the reaction kettle; and cooling and forming the materials to obtain a product. The book thermoplastic binding hot melt glue can be used at about 130 DEG C, and is suitable for linkage line production; compared with the traditional book thermoplastic binding hot melt glue, the using temperature is reduced by 30 DEG C to 50 DEG C, so that the production energy consumption (electric energy, heat energy and the like) is reduced, the maintenance cost of equipment is reduced, and the production efficiency is improved; and the glue performance in a glue groove is stable, energy-saving production is facilitated, and the hot melt glue is environment-friendly.

The invention relates to a high-temperature resistant and anti-corrosion structure for a liquid sulfur pool, and belongs to the technical field of sulfur reclamation. The high-temperature resistant and anti-corrosion structure for the liquid sulfur pool is characterized by consisting of a sulfur pool wall board, an insulated casting layer and an aluminum oxide tile layer, wherein the sulfur pool wall board and the insulated casting layer are provided with anchoring pieces. The method adopts a material which has similar property and nearly same expansion coefficient as the concrete and has small heat conductivity and good insulating and anti-corrosion properties, has quite convenient construction, can ensure long-term safe use of the liquid sulfur pool, and reduce maintenance and repair cost greatly.

A method for repairing a large diameter concrete water-supply pipe; firstly checking the water leakage situation of a large diameter concrete water-supply pipe (1-1), then roughening and scouring the concrete surface of a pipe section to be repaired, and excavating a working pit (3-1) for the segment. The method comprises the following steps: (1) disposing a plurality of steel liner pipe sections (2-1) in the large diameter concrete water-supply pipe (1-1); (2) assembling and welding the plurality of steel liner pipe sections (2-1) section by section to form a steel liner pipe (1-2), and fixing the steel liner pipe (1-2) to the wall of the large diameter concrete water-supply pipe (1-1); (3) arranging a plurality of grouting holes (3-4) and a plurality of water drainage and ventilation holes (3-5) in the steel liner pipe (1-2), plugging the ends of the steel liner pipe (1-2) while reserving a plurality of grouting observation holes (3-9); (4) grouting the segment; and (5) plugging the working pit (3-1), then conducting a test by running water through to check the repair result. The above method facilitates construction, has a low cost, and is durable, safe and reliable.

The invention provides a single-phase photovoltaic inverter on-line state monitoring and residual life prediction method, and the specific steps include: first collecting input voltage, input current, output voltage, output current and power MOSFET drain and source electrode current and junction temperature on line in real time when a photovoltaic inverter is a healthy state; then, adopting a depth neural network model to obtain a state parameter reference value of the photovoltaic inverter, calculating to obtain an on resistance reference value of the power MOSFET, and determining a failure threshold value of the single-phase photovoltaic inverter; and finally, based on the depth neural network model, obtaining a state parameter value of a tested single-phase photovoltaic inverter and performing state evaluation based on the reference value, and at the same time, adopting a Gaussian process regression model to perform multistep prediction on the tested single-phase photovoltaic inverter, thereby realizing residual life prediction. Based on multiple performance parameters of the single-phase photovoltaic inverter and taking junction temperature of the power MOSFET into consideration, on-line state monitoring and residual life prediction of the single-phase photovoltaic inverter are realized, thereby providing a theoretical basis for reasonably performing health management on a photovoltaic power generation system.

The invention discloses a whole combination type enhanced thermoplastic pipe composite tape winder and a winding method thereof. In the provided composite tape winder, the functions of composite tape delivering, tension force controlling, and winding angle controlling are integrated into a big gear; during the winding process among a matrix pipe straightening device, a matrix pipe preheating device, and a composite tape, the heating or preheating device of the contact surface between the matrix pipe and composite tape is connected to the large gear so as to drive the devices synchronously, thus during the operation process, the synchronism among rotation parts, stability, and uniformity are greatly improved; moreover, the mechanical structure of the winder is simplified, the complicated electric-control device is saved, and the fault rate during the operation process and maintenance cost are both reduced therefore. The provided wing method of the composite tape winder has the advantages of good continuity and stability, high automation degree, and good quality of composite tape winding, and thus has a good market promotion and application prospect.

The invention discloses a system and a method of piezoelectric electricity self-generating speed and distance intelligent monitoring. The system comprises a speed and distance intelligent monitoring unit and a piezoelectric electricity self-generating unit. The speed and distance intelligent monitoring unit comprises a front piezoelectric belt and a rear piezoelectric belt which are laid under a road face in transversal and spaced arrangement and an intelligent controller. The intelligent controller is composed of an amplifying circuit module, a filter circuit module, a hysteresis comparator circuit module and a microprocessor module which are in sequential connection. An output end of the microprocessor module is connected with a digital readout warning plate. The piezoelectric electricity self-generating unit comprises a plurality of piezoelectric transducers, a rectification filter circuit and a storage battery. The method comprises the steps: 1, storage and supply of piezoelectric self-generated electricity and electric energy; 2, real-time collection and processing of a signal; 3, processing and display of speed information; and 4, processing and display of distance information. The system is novel and reasonable in design, environment-friendly, economical, capable of guaranteeing safe and rapid travel of a vehicle and reducing occurrence of traffic accidents and convenient to popularize and use.

The invention relates to municipal engineering dredging devices, particularly to a municipal engineering sewer grating plate dredging device. The municipal engineering sewer grating plate dredging device is simple in cleaning, low in labor intensity, capable of saving time and labor, clean and sanitary. The municipal engineering sewer grating plate dredging device comprises a base, first wheels, universal wheels, a first large support, a large fixing plate and the like; the right of the bottom of the base is connected with the first wheels, the left of the bottom of the base is connected withthe universal wheels, and the right of the top of the base is connected with the first large support. The municipal engineering sewer grating plate dredging device can clean garbage and sundries accumulated on a municipal engineering sewer grating plate, and meanwhile, is simple in cleaning, low in labor intensity, capable of saving time and labor, clean, sanitary, simple in structure, easy to maintain and low in maintenance cost.

The invention relates to a disinfection device for surgical department and in particular relates to a disinfection device for surgical operation scissors. Aiming at solving the technical problems, theinvention provides the disinfection device for the surgical operation scissors, which does not need to be clamped by medical personnel for a long time, saves time and labor, can alleviate the workload of the medical personnel and can cleanly and completely disinfect. The disinfection device for the surgical operation scissors comprises a base, a first bearing, a large rotary shaft, a cylinder body, a liquid discharging pipe, a valve, a large supporting pipe, a large nut, a large screw rod, a second bearing, a hoisting plate, a guide rod and the like; the first bearing is embedded into the middle position of the top of the base. The disinfection device for the surgical operation scissors, provided by the invention, does not need to be clamped by the medical personnel for a long time, doesnot cause arm aches of the medical personnel, can alleviate the workload of the medical personnel, saves time and labor, can cleanly and completely disinfect and protects healthy safety of patients; the disinfection device for the surgical operation scissors is simple in structure, convenient to use, easy to produce and manufacture and easy to maintain and repair.

The invention relates to a cutting device used for hardware, in particular to a cutting device used for a hardware plate. According to the technical scheme, the cutting device used for the hardware plate does not need to be held with the hand of a worker, is simple in operation, small in labor intensity and safe in cutting, and saves time and labor. The cutting device used for the hardware plate comprises a base, a first support, a small support and the like; the first support is located above the base and is connected with the base, the small support is located on the left side of the first support, and the bottom of the small support is connected with the top of the base. The cutting device used for the hardware plate does not need to be held with the hand of the worker, is convenient tooperate, small in labor intensity, high in cutting efficiency, safe and reliable in performance and favorable for protecting safety of workers, favorable for enterprise production and development, simple in structure, easy to maintain and repair, low in maintaining cost, wide in application scope and easy to apply and popularize, and saves time and labor.

The invention discloses an automatic material spreading device for a similar material simulation test, and a use method of the automatic material spreading device. The automatic material spreading device integrates a material accommodating box and a vibration device; a vibrating motor is used as a vibration source for realizing material spreading and tamping vibration; an auxiliary extrusion for force application is carried out through a hydraulic cylinder according to conditions to ensure that requirements on the flatness and the consistence of a simulation rock formation can be met in a similar material model production process. Compared with the prior art, the automatic material spreading device is simple in structure, flexible in control, high in maneuverability and production efficiency, low in labor intensity, excellent in material spreading and tamping effect, and the like; the forming speed and quality of the similar material model can be greatly improved, and the consistency of the similarity ratio of thickness to strength of the formed simulation rock formation is greatly improved; in addition, the automatic material spreading device has the benefits of being low in manufacturing cost, convenient to assemble and disassemble, low in maintenance and repair cost, and the like.

The invention relates to a cutting device, in particular to a cutting device for rubber. The cutting device for the rubber includes a working table, a large fixing plate, a driving device, a cutting device, a lifting rod, a sleeve and the like; the large fixing plate is fixedly connected with the working table, the large fixing plate is provided with the driving device, and the cutting device is located at the left side of the large fixing plate; the lifting rod is located below the working table, the lifting rod is fixedly connected with the working table, and the lifting rod is slidably located in the sleeve; and the side wall of the sleeve is provided with a locating screw which is connected with the sleeve in a thread mode. According to the cutting device for the rubber, the driving device and the cutting device are arranged to conveniently and fast cut the rubber, the cutting efficiency is high, the effect is good, the labor intensity is low, and time and labor can be saved.

The invention relates to a recovery processing device, in particular to a recovery processing device for a laundry detergent bottle, and aims to solve technical problems in the prior art. In order tosolve the above technical problems, the recovery processing device is provided. The recovery processing device comprises a base, a moving device, an intermittent device, a first large bracket, a guiding sleeve, a long guiding rod and the like, wherein the intermittent device is positioned above and connected with the moving device; the first large bracket is positioned on the right sides of the moving device and the intermittent device; the bottom of the first large bracket is fixedly connected with the top of the base; and the first large bracket is connected with the moving device. Accordingto the recovery processing device provided by the invention, the intermittent feeding operation can be achieved through the intermittent device, thereby avoiding the blockage; and meanwhile, the laundry detergent bottle can be subject to preliminary processing through the intermittent device, thereby reducing the labor intensity of working personnel.

The invention discloses a device for collecting, storing, analyzing and displaying vehicle data, which is characterized by comprising a vehicle data collecting module and a host machine. The vehicle data collecting module comprises an OBD (omnibearing-distance system) data interface plug and a wireless data sending module; the host machine comprises a data receiving module, a storage unit, an expert analytic system, a data transmitting module and a display module; the expert analytic system comprises a data reading-in module, a data output module, a translating module, a processing module, a parameter value database of all components of all vehicle types, a running reference database of all the components of all vehicles, a maintenance reference database of all the components of all the vehicles, a fault code and fault detection flow database, and a man-machine interface module. By the expert analytic system, the device for collecting, storing, analyzing and displaying the vehicle data feeds back the data which are hard to obtain to a user in a simple and understandable way by data comparison and analysis, gives out a potential safety hazard warning, prompts to maintain and repair the components as required, corrects a driving habit, saves energy, reduces emission, decreases maintenance cost and repair cost, and gives out an early warning to the potential safety hazards of the vehicles in advance.

The invention relates to a teacher's desk applied to teaching, and in particular to an adjustable teacher's desk applied to teaching. The invention aims at solving the technical problem of providing the adjustable teacher's desk which is flexible in structure, adjustable, broad in application scope and capable of meeting a using requirement of teaching personnel. In order to solve the technical problem, the adjustable teacher's desk applied to teaching comprises a base, a big box body, a big lifting plate, a big desk board, a first lifting rod, a first sleeve, a first locating screw rod, a second lifting rod, a second sleeve, a second locating screw rod and the like, wherein the big box body is arranged at the upper side of the base; the big box body is connected to the base; and the big lifting plate is arranged in the big box body in a sliding mode. The adjustable teacher's desk applied to teaching provided by the invention is flexible in structure, adjustable, broad in application scope and capable of meeting the using requirement of the teaching personnel; the adjustable teacher's desk is conducive to implementation and proceeding of teaching work; and the adjustable teacher'sdesk is convenient to operate, simple in structure and easy for production and manufacturing.

The embodiment of the invention discloses a composite floor construction method which is applied to the surface of a concrete base layer. The construction method comprises the steps that 1, the base layer is treated; 2, a decorative mortar layer is paved on the basis of the treated base layer; 3, a solid mortar layer is paved on the basis of the decorative mortar layer; 4, a curing layer is paved on the basis of the solid mortar layer, and then construction of a composite floor is completed. The composite floor paved through the construction method has the good mechanical strength and hardness, the high wear resistance and compression resistance and the permanent sealing and permeability preventing performances, has the flat, smooth and bright surface like that of marble and is extremely high in aging resistance, the construction cycle is shortened, the floor only needs to be mopped with clear water without being waxed, the service life is long, and a large amount of maintenance and repair cost is reduced.

The invention relates to a lesion clearing device for dermatology, in particular to an easy-to-use lesion clearing device for dermatology. The technical purpose to be achieved is to provide the easy-to-use lesion clearing device for the dermatology which can conduct supporting and save time and effort. According to the technical scheme, the easy-to-use lesion clearing device for the dermatology comprises a base, an elliptical ring plate, a first concave plate, a first long guiding rod, a first long spring, a second concave plate and the like; the elliptical ring plate is located directly abovethe base, and a first lifting hole is formed in the middle of the top of the elliptical ring plate. The easy-to-use lesion clearing device for the dermatology can conduct supporting, save the medicalstaff's strength, reduce the burden of the medical staff, save time and effort, be beneficial to the patient's treatment and rehabilitation, be simple in structure, easy to use, easy to manufacture and easy to maintain, and has low manufacturing and maintenance costs.

The invention relates to an oil removal device, in particular to a rare-earth material liquid oil removal device convenient to clean, and aims to provide the rare-earth material liquid oil removal device convenient to clean. The oil removal device comprises a base, a leftward and rightward moving device, an upward and downward oil suction device, a fixing plate, an oil removal cylinder and the like; the fixing plate and the oil removal cylinder are arranged between the leftward and rightward moving device and the upward and downward oil suction device; the bottom of the oil removal cylinder is connected with the top of the fixing plate through welding; the fixing plate is arranged above the leftward and rightward moving device; and the upward and downward oil suction device is arranged above the oil removal cylinder. The oil removal device adopts the structure that the upward and downward oil suction device is separated from the oil removal cylinder, so that the oil removal device can be cleaned conveniently, and the cleaning efficiency is high.

The invention relates to a rust preventing device for machinery, in particular to an oil-spraying rust preventing device for a mechanical component. The invention solves the technical problems by providing the oil-spraying rust preventing device for the mechanical component, which ensures low labor intensity, has high rust preventing efficiency, saves time and labor and saves resources. In order to solve the technical problems, the invention provides such the oil-spraying rust preventing device for the mechanical component. The oil-spraying rust preventing device for the mechanical component comprises a base, a first small bracket, a first rotating shaft, a rotating wheel, a first chain wheel, a cam, a second chain wheel, a second rotating shaft, a chain plate and the like, wherein the first small bracket is connected to the top of the base; the first small bracket is arranged in front-and-back symmetry; the first rotating shaft is rotationally connected with the upper end of the firstsmall bracket. The oil-spraying rust preventing device for the mechanical component, provided by the invention, ensures low labor intensity, has high rust preventing efficiency, saves the time and the labor, saves the resources, facilitates reduction in expenses of an enterprise, facilitates the production and the development of the enterprise, and has safe and reliable performance and a simple structure.

The invention relates to the field of water control valves, in particular to a valve body with a filtering function. The valve body comprises a valve shell, wherein the left and right sides of the valve shell are fixedly provided with a water inlet connecting pipe and a water outlet connecting pipe respectively, the center of the inner portion of the valve shell is rotatably in fixed-axis connection with a rotating shaft, the rotating shaft is fixedly provided with a filter net, the water inlet connecting pipe is connected with an intermittent reciprocating mechanism and is connected with therotating shaft through the intermittent reciprocating mechanism, the lower side of the valve shell is fixedly provided with a discharge pipe, the joint of the discharge pipe and the valve shell is fixedly provided with a brush frame cleaning the filter net, and an outlet end of the discharge pipe is provided with an automatic discharge mechanism. The valve body with the filtering function can automatically perform cleaning, keep the stable discharge value of the filter net and improve the water delivery efficiency so that the water pressure in the valve body can be kept stable in time, therefore, structural parts in the valve body are not damaged by the excessive water pressure, the pipe is also prevented from being broken, automatic discharge can also be achieved, and the time and labor are saved.

The invention relates to a medical bed for a gastroenterology department and in particular relates to a turning type medical bed for the gastroenterology department. The technical problem to be solvedin the invention is to provide the turning type medical bed for the gastroenterology department. In order to solve the technical problem, the turning type medical bed for the gastroenterology department provided by the invention comprises a bed plate and the like, wherein a limiting device is connected with the bed plate; a fixing device is connected with the bed plate; a rotating shaft is positioned on the right side of the bed plate; the rotating shaft and the bed plate are in fixed connection; a connecting rack is positioned on the right side of the bed plate; the connecting rack and the rotating shaft are connected with the limiting device; and a rotating disc is positioned on the left side of the bed plate. The turning type medical bed for the gastroenterology department provided bythe invention comprises the limiting device and the fixing device, the bed plate can be fixedly limited by the limiting device, and a patient can be safely fixed by the fixing device, so that the patient can be rapidly and stably rotated, and convenience is brought to vomiting of the patient.

The invention relates to a clamping device for a numerically-controlled machine tool, in particular to a convenient-to-use clamping device for the numerically-controlled machine tool. Therefore, the invention aims to solve the technical problem of providing a convenient-to-use clamping device which can be used for turning workpieces and save time and labor for the numerically-controlled machine tool. The convenient-to-use clamping device for the numerically-controlled machine tool comprises a base, a first large bolt, a second large bolt, a large supporting plate, a large guide rod, a first bearing seat, a first inverted trapezoidal block, a second bearing seat, a second inverted trapezoidal block and the like, wherein a first large through hole is formed in the left end of the base, and the first large bolt is positioned in the first large through hole. According to the convenient-to-use clamping device for the numerical control machine tool, the workpieces can be turned in the machining process, the other surfaces of the workpieces can be machined without detaching the workpieces, the clamping device is convenient to use, the time and the labor are saved, the production and development of enterprises are facilitated, and the structure is simple.

A water straining type indoor air purifier comprises a housing provided with an air inlet and an air outlet. The air purifier has the following characteristics: the air outlet is arranged at one end of an air inducing pipe, which is provided with a blower fan thereon and a filter screen therein; the filter screen is sleeved on an external side of a cylinder inner liner, which is arranged in the air inducing pipe through a connecting piece; the other end of the air inducing pipe extends into a water tank and is above a water surface; and the air inlet is connected with an air inlet pipe, which extends into the housing and is under the water surface in the water tank. The invention reduces operating cost and maintenance cost of equipment, avoids dust smell of filtered air, guarantees freshness of air and enhances indoor air quality.

The invention discloses a double-layer threaded turbulent flow heat exchanger which comprises a big pipe, a medium pipe and a small pipe, wherein the big, medium and small pipes are coaxial and sleeved with one another; a first cold medium channel is formed between the big pipe and the medium pipe; a hot medium channel is formed between the medium pipe and the small pipe; a second cold medium channel is formed in the small pipe; the medium and small pipes are threaded turbulent flow pipes; and the big pipe is a smooth pipe or threaded turbulent flow pipe. The heat exchanger provided by the invention can resist chloride ion corrosion and ensure the service life of equipment; the structure of a stainless steel three-layer threaded pipe ensures entirely uniform heat exchange and can prevent the formation of cold bridge and dirt in the pipe to ensure the heat exchange efficiency; and moreover, as a strong turbulent flow can be produced, heat exchange between the medium close to the pipe wall and the medium at the pipe center can be accelerated, thereby ensuring thorough heat exchange, improving equipment efficiency and prolonging the service life; and the sleeve structure has strong pressure bearing capacity, prevents influence on the equipment caused by excessively high pressure, pressure leakage failure and other factors during the operation of the equipment, and prolongs the service life.

The invention relates to a medical sickbed, in particular to a medical sickbed convenient to clean and disinfect, and aims at providing the medical sickbed which does not need to be moved, is convenient and rapid to clean and disinfect and saves time and labor. In order to achieve the technical purpose, the medical sickbed convenient to clean and disinfect includes a bed board, a large support plate, a placement plate, support legs, a box, a liquid inlet pipe, a first valve, a hose, a second valve, a high pressure pump, a shell, a hood, a guide rod and the like; the large support plate is arranged at the left side of the bed board and is connected with the bed board, and the placement plate is located at the right side of the large support plate and is connected with the large support plate. The medical sickbed can be conveniently and rapidly cleaned and disinfected without movement, the time and the labor are saved, medical workers' workloads are reduced, and therefore the medical sickbed is clean, sanitary, beneficial to conducting medical work, simple in structure and convenient to operate.

The invention relates to a crushing device for medical medicine bottles, in particular to the crushing device for the medical waste glass medicine bottles and aims to achieve the technical effect of providing the crushing device for the medical waste glass medicine bottles, wherein the crushing device is simple and convenient in operation, small in labor intensity, safe and reliable. According tothe technical implementation scheme, the crushing device for the medical waste glass medicine bottles comprises a base, an L-shaped supporting plate, a big barrel body, a first bearing, a big rotatingshaft, a stirring plate, a conical funnel, a first crushing rod, a second crushing rod, a third crushing rod and the like. The L-shaped supporting plate is located on the base and is connected with the base, and the big barrel body is located on the left side of the L-shaped supporting plate and is connected with the L-shaped supporting plate. The crushing device for the medical waste glass medicine bottles provided by the invention is simple and convenient in operation, small in labor intensity, safe and reliable in performance, time-labor saving, high in crushing efficiency, good in effect,simple in structure, easy to maintain and repair, low in maintenance and repair cost and easy to produce and manufacture.

The invention relates to a self-cleaning type polypropylene recycle gas compressor gas film sealing structure which comprises a machine cleaning liquor inlet, a machine body cone, a structure gland, a shaft, a cleaning liquor outlet, a pushing ring, a fixed ring, a clamping ring, a sealing movable ring, an atmospheric side movable ring base, an atmospheric side labyrinth seal, a medium side fixed ring base and a medium side labyrinth seal. The self-cleaning type polypropylene recycle gas compressor gas film sealing structure is characterized in that a sealing structure body comprises the medium side main seal, a bearing side auxiliary seal and the labyrinth seals, cleaning liquor tangentially enters a sealing cavity of the machine body cone from the machine cleaning liquor inlet to form rotational flow, and particles are taken away from the sealing structure. By means of the self-cleaning type polypropylene recycle gas compressor gas film sealing structure, end face friction abrasions are avoided, the sealing stability is improved, and the problems of being short in service life and the like are solved; due to cleaning, temperature rising of the end face is small, energy consumption is low, the sealing performance and the stability are good, and therefore the self-cleaning type polypropylene recycle gas compressor gas film sealing structure has the advantages that the sealing reliability is good, and the maintenance and repairing cost is reduced.

The invention relates to a rust-protection device for machines, in particular to an immersion oil rust-protection device for mechanical parts. The immersion oil rust-protection device for mechanical parts has the advantages of low labor strength, saving in time and labor force, cleanliness, sanitation and capability of protecting workers from being stained with oil stain. The immersion oil rust-protection device applied to mechanical parts comprises a base, a first bearing, a large lead screw, a rotating wheel, a large nut, a large rotating disk, a first cylindrical screen, a first tray, an annular concave plate, a first pin rod and the like, wherein the first bearing is embedded into the middle position of the top of the base; the lower end of the large lead screen is in interference fitwith the first bearing. The immersion oil rust-protection device for mechanical parts provided by the invention has the advantages of low labor strength, saving in time and labor force, cleanliness, sanitation and capability of protecting workers from being stained with oil stain, contribution to the health of the workers, simple structure, convenience in operation, easiness in maintenance and lowmaintenance and repair cost.

The invention relates to a safety protection device for building construction, in particular to a deep foundation pit safety protection device for building construction, and aims at achieving the technical purpose of providing a deep foundation pit safety protection device which is used for building construction, can supply safety protection to constructors in a building deep foundation pit and iseasy to operate. In order to achieve the technical purpose, the deep foundation pit safety protection device for building construction comprises a first base, a cover body, a sphere, a first support,a first large screw, a first nut, a second large screw, a second nut, a second support, a supporting plate, a connecting ball and the like, an arc-shaped groove is formed in the top of the first base, and the cover body is located in the arc-shaped groove and makes contact with the first base. According to the deep foundation pit safety protection device for building construction, when the building deep foundation pit landslides, safety protection can be supplied to the constructors far away from a safety ladder in the building deep foundation pit.

The invention relates to an examination platform for ophthalmology departments, in particular to a convenient-to-adjust examination platform for the ophthalmology departments. The convenient-to-adjustexamination platform is characterized by comprising a base, a T-shaped slider, a first support tube, a first lifting rod, a first positioning screw rod, a first chair board, a support column, a largeworkbench and the like, wherein a first T-shaped sliding groove is formed in the left side of the top of the base, and the T-shaped slider is located in the first T-shaped sliding groove. The convenient-to-adjust examination platform has the advantages that the examination platform with a flexible structure can be adjusted conveniently, meet demands of different people, carry the different peopleeffectively and relieve burdens of operators, and is beneficial to examination and treatment of patients' eyes, simple in structure and convenient to use.

The invention relates to a safety protection device for buildings, in particular to a safety protection device for building deep foundation pit excavating. The safety protection device for building deep foundation pit excavating can protect a building deep foundation pit and protect construction staff and equipment during building deep foundation pit excavating, can increase the construction speedand facilitates implementation and development of building construction. The safety protection device for building deep foundation pit excavating can protect the building deep foundation pit and protect construction staff and equipment during building deep foundation pit excavating, can increase the construction speed, facilitates implementation and development of building construction, and is safe and reliable in performance, simple in structure and convenient to operate.