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

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 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 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 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.

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 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.