82results about How to "Save maintenance money" patented technology

The invention relates to a working method for determining the combining ratios of cold recycled mixtures of emulsified asphalts and comprises the following aspects: (1) the performance evaluation of old asphalt mixtures; (2) the design of the combining ratio of cold recycled mixtures of the emulsified asphalts; (3) the performance tests of the performance of the cold recycled mixtures of the emulsified asphalts. The working method has the advantages of releasing the unavoidable reflective cracking problem of a semi-rigid base, improving the water temperature environment, reducing the tensile stress at the bottom of the semi-rigid base and prolonging the service life of the semi-rigid base asphalt pavement, thus providing effective measure of settlement for newly built pavements, more particularly for the maintenance and transformation of old roads; the working method can save a plurality of construction and maintenance funds as well as reducing the resource waste and environmental destruction.

The invention relates to the technical field of construction waste recycling, and particularly discloses a design method of a cement stabilization recycled concrete aggregate (RCA) base or subbase. The design method comprises the steps: step one, determining materials and thicknesses of all structural layers of a pavement structure; step two, establishing a calculating model according to the materials and the thicknesses of all the structural layers, and determining the 7d cleavage strength design criteria and 7d unconfined compressive strength design criteria of the cement stabilization RCA base or subbase according to the calculating model; step three, carrying out the gradation composition design for the cement stabilization RCA on the base or subbase, and calculating and determining the design cement dosage Copt of the cement stabilization RCA, meeting the 7d cleavage strength design criteria and 7d unconfined compressive strength design criteria; the design is passed if Copt is smaller than or equal to 6%; if Copt is greater than 6%, the gradation composition design for the cement stabilization RCA is regulated to enable Copt to be smaller than or equal to 6%. By adopting the method, design is carried out rationally according to the technical nature of the construction waste RCA, the investment cost is low, use and operation are easy and simple, and the use effect is good.

The invention relates to a low-alkali gel encapsulated microbial self-healing agent and application thereof. The self-healing agent comprises a component A and a component B, wherein the component A is obtained by mixing and stirring a nutritional ingredient, a low-alkali gel medium and water, uniformly mixing a mixed solution and a concentrated bacillus solution, standing for hardening, and grinding to form particles; the component B is a mixture of urea and anhydrous calcium nitrate. Dry-mixed cement mortar with the added microbial self-healing agent is used for self-healing of gaps of cement, bacterial cells can be effectively protected, the ore yield is increased, high compatibility with a cement base material is achieved, a produced healing medium is natural carbonate, and has high durability, volume stability and environment friendliness, maintenance funds can be greatly saved by a self-healing characteristic, meanwhile, the loading capacity can be remarkably improved, moreover, high compatibility with the cement base material is achieved, the influence on own performance of the cement base material can be avoided, and the self-healing efficiency can also be greatly improved.

The invention provides a road rolling monitoring system and a remote road rolling monitoring system, relates to the technical field of traffic, aims to solve the technical problem of poor user experience caused by low locating accuracy and incapability of meeting construction requirement in the conventional locating manner of a road roller, and can be used for improving the locating accuracy and user experience. The road rolling monitoring system comprises a reference station, vehicle-mounted collection equipment and a field computer monitoring terminal, wherein the reference station is connected with the vehicle-mounted collection equipment; the vehicle-mounted collection equipment is connected with the field computer monitoring terminal; the reference station comprises a first positioning device, the reference station is arranged on a position with known coordinate (generally is arranged at a wide region close to a working plane); the vehicle-mounted collection equipment comprises avehicle-mounted collection station and a sensor group; the sensor group is connected with the vehicle-mounted collection station; the vehicle-mounted collection station comprises a second positioningdevice; the vehicle-mounted collection station is arranged on a road roller to be tested; the first positioning device and the second positioning device are provided with same types of locators.

The invention relates to the field of machining machinery, in particular to a never-worn milling machine, and belongs to machining equipment for machining refractory materials and nonmetallic materials. The milling machine comprises a gantry framework, a milling head mechanism and a worktable guide rail, wherein one side of a cross beam on the gantry framework is connected with the a lifting transmission mechanism in an upright post; a sliding plate base connected on the other side of the cross beam through a left-and-right transmission mechanism is connected with the milling head mechanism; the lower part of the milling head mechanism corresponds to a workpiece on the worktable guide rail mechanism; replaceable wear-resistant belts are installed at sliding fit positions of the upright post and the cross beam, the cross beam and the sliding plate base, and a worktable and a guide rail respectively; the replaceable wear-resistant belts can be wear-resistant soft belts, wear-resistant steel belts or wear-resistant nodular iron castings. The never-worn milling machine solves the problems that the conventional milling machine has certain wear at work and thus the accuracy cannot meet technical requirements; the never-worn milling machine can reduce the maintenance cost and can ensure the machining accuracy for a long time.

The invention relates to a multifunctional light inorganic culturing substrate for greening. The multifunctional light inorganic culturing substrate mainly comprises the following components in percentage by volume: 45-55 percent of pearl stone, 30-40 percent of thoroughly-decomposed wood dust, 8-13 percent of medical stone and 2-7 percent of pumice serving as media; meanwhile, a nutritional layer consisting of 8-20 g/m<3> of inorganic fertilizer nitrification inhibitor, 150-280 g/m<3> of agricultural potassium sulfate, 100-400 g/m<3> of diammonium phosphate, 200-500 g/m<3> of urea, 10-30 g/m<3> of agricultural copper sulfate, 15-40 g/m<3> of manganese sulfate, 10-30 g/m<3> of agricultural zinc sulfate, 10-30 g/m<3> of agricultural ferrous sulfate, 5-15 g/m<3> of boric acid, 200-300 g/m<3> of plant water retention agent and 0.19-0.38 g/m<3> of microbial insecticide is added; and a draining layer consists of water accumulating and draining plates for greening. The multifunctional light inorganic culturing substrate has the excellent properties of high particle strength, stable performance, durability, light weight, cleanliness, multiple functions, complete drainage, water retention, fertilizer retention, environmental friendliness, high efficiency, easiness and convenience for constructing, suitability for plant growth, and the like. The multifunctional light inorganic culturing substrate with a special agglomerate porous structure is better suitable for root system development of plants, and has a good fixing effect.

The invention discloses a device and a method of monitoring the state of a working medium in compression refrigeration system operation. Non-bearing connection is adopted between a liquid storage tankand pipelines of other parts of the refrigeration system, and the state of the refrigeration working medium is monitored by measuring the weight of the liquid storage tank in operation of the system.Whether the operation state of the refrigeration system is normal or not is judged manually or through a computer or whether an alarm or automatic control is implemented through gravity, tension andpressure switches by comparing parameters of weight changes of the liquid storage tank before and after the compressor is started and comparing changes of numerical values of a high-pressure pressuregauge and a low-pressure pressure gauge.

The invention discloses a drive shaft capable of preventing overload fracture, which comprises a half-coupling 1, a half-coupling 2, a connector 1, a connector 2, a sleeve and a safety pin, wherein the left end of the half-coupling 1 is connected with a gearbox input shaft through a key; the right end of the half-coupling 2 is connected with a main motor output shaft through a key; the right side of the half-coupling 1 is fixed and connected with the connector 2 through a bolt; the left end of the connector 1 is welded with a shaft head; the shaft head can be inserted to an internal cavity on the right end of the connector 2 to be fixed axially and rotate radially; and the right end of the connector 1 is fixedly connected with the half-coupling 2 through a bolt. The drive shaft capable of preventing overload fracture can provide a substitute for a high-torque drive shaft used by flour mill equipment or other heavy equipment; and thus, the drive shaft capable of preventing overload fracture enhances the safety and reliability of the equipment, can better protect related equipment and personnel from damage, can greatly lower the maintenance cost and shorten the maintenance time, effectively enhances the production efficiency, and brings in considerable economic benefit.

The invention discloses a riveter comprising a piston and an abdication group with an inner liner ring and an outer liner ring, wherein the inner liner ring with a sleeve structure has the external diameter being divided into a small-diameter part and a bigger-diameter part, between which step transition is provided, and external surface of the small-diameter part is provided with outside screw; the outer liner ring is in sleeve structure cooperating with the inner liner ring, and internal diameter face of the outer liner ring has internal screw coordinating with the outside screw of the outer liner ring. The small-diameter parts on external surface of an outer abdication ring and an inner abdication ring are fixed by the screws, and are screwed down, then a rear end of the outer liner ring bears against the step of the inner liner ring and the frond end of the outer liner ring aligns to a frond end of the inner liner ring, wherein the external diameter face at an adjacent position of the small-diameter part and bigger-diameter part of the inner abdication ring is of smooth plane. Preferred, the piston adopts an integrated structure of the piston column and the piston plate, according to the above improvement of the structure, service time in fault-free of the riveter is prolonged.

The invention discloses a digital coded track bearing plate and a washer, a sleeper bottom bearing plate and a bearing plate sheet, a nylon seat and a washer seat, belonging to a maintenance technology of level, height, railway space and direction control of railways, subways or mine railways and aiming at solving the defects that more railways and less measurement errors enable consolidation not to be easy to implement, a hard bottom ramming ballast bed is not easy to consolidate, and the prior height-adjustment bearing plate is easy to escape to cause the original sleeper bearing plate to fall off to endanger the traveling safety so as to cause important links of the hard bottom adjustment washer in the railway maintenance technology to waste and paralyse, and thus the whole maintenance procedure is influenced to produce complex unfavorable situation. The invention codes the digital coded sleeper bearing plate, the washer and the bearing plate by utilizing a digital coding technology, implements the bearing plate adjustment in upper and lower three-dimensional spaces of the sleeper, controls the level, the height, the railway space and the direction of the lines in a high precision way and repairs the important maintenance section of the railway hard bottom adjustment washer (precisely control link), thereby breaking the neck and resolving the confliction, adjusting the system program to operate, together solving all the defects of joints and welding lines in a unicontrol and physical treatment way, additionally providing auxiliary support reinforcement and climb-preventing locking for line weak spots, developing the implementation space and ensuring that the railways are balance and stable and the speed-raising and the heavy load of a train are safe.

The invention relates to a defrosting system of an evaporator of a low-temperature storeroom for a ship, which comprises the evaporator, a water collecting plate (1) and a down pipe (2). The water collecting plate (1) is arranged at the bottom of the evaporator, the down pipe (2) is mounted at the bottom of the water collecting plate (1), the evaporator consists of six groups of defrosting heating pipes (6), each group of defrosting heating pipes (6) comprises two defrosting heating pipes which are connected in parallel, the six groups of defrosting heating pipes (6) are in star joint, two U-shaped electric heating pipes (3) are disposed in the water collecting plate (1), a heating wire (4) is uniformly wound on the outer wall of the down pipe (2), and a heat-insulation pipe (5) is disposed on the outer side of the heating wire (4). The defrosting system of the evaporator of the low-temperature storeroom for the ship has the advantages that defrosting failure rate of the evaporator is reduced, running reliability of equipment is improved, replacement frequency of the heating pipes is reduced, maintenance cost is saved, and labor intensity of staff is greatly reduced.

The invention relates to a three-pivot chute lifting appliance for drawing a ship loader. The lifting appliance mainly comprises a motor, a brake, a speed reducer and a winding drum which are assembled into a whole and arranged on a chute platform, and is characterized in that: the winding drum is provided with a first group of guide pulleys, a second group of guide pulleys and a third group of guide pulleys; the first group of guide pulleys draw a first steel wire rope, the second group of guide pulleys draw a second steel wire rope, and the third group of guide pulleys draw a third steel wire rope; and the first steel wire rope, the second steel wire rope and the third steel wire rope are respectively connected with a telescopic chute. The telescopic chute is uniformly provided with connection points of the three steel wire ropes at 120 degrees, so the telescopic chute can be effectively prevented from irregularly swinging and stably does up and down free telescopic movement; friction among chutes can be reduced and the chutes are prevented from being locked; and the three-pivot chute lifting appliance has the advantages of safe and reliable use, convenient maintenance, and capabilities of prolonging the service life of the telescopic chute and improving production efficiency.

The invention relates to the technical field of liquid leakage detection of medical equipment, and relates to a liquid leakage monitoring alarm circuit of medical equipment. For solving the technicalproblem, the liquid leakage monitoring alarm circuit of medical equipment is provided, wherein when liquid leakage occurs in medical equipment, a liquid leakage monitoring alarm circuit is used for timely and effectively reminding the working personnel in an acousto-optic alarm mode, thereby reducing the loss and saving the maintenance cost. The medical equipment liquid leakage monitoring alarm circuit comprises a liquid leakage sensor, a liquid leakage monitoring module and the like; the input end of the liquid leakage monitoring module is connected with the output end of the liquid leakage sensor, and the liquid leakage sensor is used for detecting whether the equipment suffers from liquid leakage or not. When liquid leakage exists inside the medical equipment, a switch indicator lamp isturned on, a relay drive module works, and an alarm module and a voice drive module are controlled to work, so that the working staff can be informed in the acousto-optic alarm mode, and the workerscan know which equipment suffers from liquid leakage as soon as possible to make corresponding treatment, thereby reducing the loss and saving the maintenance cost.

The invention discloses acoustical equipment with an anti-fall protection device. The equipment comprises a box, wherein a fixing rod is welded with the bottom of the inner wall of the box, a first sleeve is movably sleeved on the surface of the outer side of the fixing rod, a top plate is welded with the top of the first sleeve, a shell is welded with the inner wall of the box, the shell is I-shaped, a fixing block is welded with the top of the inner wall of the shell, a second sleeve is welded with the side wall of the fixing block, a second spring is welded with one side of the inner wall of the second sleeved, the other end of the second spring is welded with a sliding plate, a connection rod is welded with the side wall of the sliding plate, a through hole is formed in the side wall of the second sleeve, and one end of the connection rod penetrates through the through hole in the side wall of the second sleeve. According to the equipment provided by the invention, when the acoustical equipment falls down, precision equipment in the acoustical equipment is protected against to be damaged, the acoustical function is protected against to be damaged, the service life of the acoustical equipment is increased, the maintenance frequency of the acoustical equipment is reduced, the maintenance cost is saved, and the continuous operation of the acoustical equipment is ensured, and the continuous operation of the acoustical equipment is prevented from being affected.

The invention discloses a frequency-conversion speed regulating device applied to an oilfield water injection system. The frequency-conversion speed regulating device applied to the oilfield water injection system is mainly composed of a water injection pump (1), a pressure sensor (2), a frequency-conversion speed regulator (3) and a central control processor (4), wherein the pressure sensor (2) and the frequency-conversion speed regulator (3) are respectively connected with the water injection pump (1), and the central control processor (4) is connected with the pressure sensor (2) and the frequency-conversion speed regulator (3). The invention further discloses a frequency-conversion speed regulating method based on the frequency-conversion speed regulating device. The frequency-conversion speed regulating device achieves the aims of conducting constant voltage water injection, saving energy and reducing consumption, improving automatic management level, and saving a large amount of maintenance fund, a frequency-conversion speed regulating system can enable a machine pump to achieve soft boot under the condition of load, and the frequency-conversion speed regulating device effectively restrains and prevents power grids and mechanical equipment from being impacted by big electric current, prolongs pump inspection period, and greatly reduces cost of pump inspection.

Primary stator of external rotor of electric rotating motor is installed on fixed not revolving principal axis. Being coupled to clamping chuck of machine tool to constitute a mechanical whole, the secondary rotor of the motor is rotated around principal axis. New type machine tool of using the said clamping chuck of machine tool discards headstock completely. Using converter technique, voltage-regulating technique makes the clamping chuck of machine tool obtain each moment and rotate speed. Advantages are: simple structure, compact, lightness, low cost, easy installation and maintenance.

The invention discloses a 2/3-molded-line double-head single-screw pump applicable to oil extraction in an oil field. The 2/3-molded-line double-head single-screw pump comprises a 2/3-molded-line double-head single-screw pump body, wherein a nylon layer is uniformly compounded on the surface of a double-head helical rotor of the 2/3-molded-line double-head single-screw pump; a stator is a die-cast metal stator; a ratio b/a of the short radius to the long radius of the elliptical outline of the section of the double-head helical rotor is 1/2 to 3/4; and the rotary eccentricity e between the double-head helical rotor and the stator is 1/2(a-b). The 2/3-molded-line double-head single-screw pump is low in vibration; by adopting a metal stator structure, a swelling phenomenon is avoided and a starting torque is smaller, so that the pump can run at a higher rotating speed, and the flow is increased; therefore, the pump can be applied to submersible pumps, oil-immersed pumps and deep well pumps with larger flow, and is high in performance, saves energy and has a very wide application prospect.

The invention discloses a river levee for flood control and power generation. The river levee comprises a water-retaining wall (1), a drainage channel (2) and a soil-retaining wall (3), wherein the water-retaining wall and the soil-retaining wall are connected with a fixed beam (7), a pressurized water channel (8), a tail water collecting pit (14), a flaring water intake (16) and a subsequent project reserved port (10); the river levees for flood control and power generation are constructed on both sides of a river from the upstream to the downstream by the depth of more than 4 meters of a first riverbed (5) at the position of a riverway (6) on the basis of the existing river levees (4); a waterwheel type hydroturbine (15) erected on the drainage channel (2) is pushed to rotate by virtue of the head formed between the ground and the underground, and then a generator is driven to rotate by use of a speeder, and therefore, the purpose of power generation is achieved. The river levee for flood control and power generation has the advantages of no demand on diversion channel construction, avoidance of river closure, no inundated area, no requirement on immigration, no influence on normal shipping, great reduction of construction period and construction cost, and the like.

The invention discloses a method for testing vibration of pipeline transportation-oriented compressor. The method comprises the following steps of: (1) determining a position needing vibration testing according to characteristics of the compressor; (2) installing acceleration transducers serving as testing channels at the position needing the vibration testing and connecting each of the acceleration transducers with a vibration analysis and monitoring system; (3) acquiring vibration data of each of the testing channels by the acceleration transducers and analyzing the vibration data by special analysis software; and (4) according to an analysis result, taking technical measures that pipeline vibration is reduced at the position of which the vibration is out of limit in the compressor. The method is used for testing the vibration situation of a compressor set used in a pipeline transportation system, and can provide a powerful technical support for optimum design and scientific maintenance of the pipeline transportation system.

The invention relates to a feeding device of a screening machine for producing ink powder. A feeding pipe flange is fixed with a feeding pipe; two shaft sleeves are respectively fixed on the feeding pipe flange and the feeding pipe; two oiliness seal rings are respectively arranged in the two shaft sleeves; a feeding screw is arranged in the feeding pipe and in the shaft sleeves provided with theoiliness seal rings; the other end of the feeding screw passes through the feeding pipe flange and is connected with connecting sleeves arranged in the shaft sleeves provided with the oiliness seal rings; a speed reducer flange is fixedly connected with the feeding pipe flange through the connecting rods; an output shaft on an alternating current single-phase speed reducer is fixedly connected with the connecting sleeves. By the feeding device, time and labor are saved during installation, maintenance and debugging of the alternating current single-phase speed reducer and the feeding screw, the maintenance cost is saved, waste of an ink product is reduced, the product yield is improved, and most important, dust leakage is effectively controlled, and environmental protection is achieved.