37results about How to "Short maintenance time" patented technology

The invention relates to a high-performance polymer-cement-based composite repair material and a preparation method thereof, and the high-performance polymer-cement-based composite repair material comprises the following components by mass: 690-710 parts of cement; 130 to 150 parts of fly ash; 45 to 55 parts of silica fume; 200 to 210 parts of mixing water; 950 to 1050 parts of fine aggregate; 21-23 parts of a modified polymer; 9-10 parts of an expanding agent; 4-5 parts of a water reducing agent; 5-6 parts of modified fiber; and 0.16 to 0.18 part of a defoaming agent. The nano-toughened modified polymer and the modified fiber are used, the nano-modified polymer can improve the microstructure of the repair material, the modified fiber can limit shrinkage of the repair material and enhance the crack resistance of a matrix, the toughness and the mechanical property of the repair material can be effectively improved through the synergistic effect of the nano-modified polymer and the modified fiber, and it is guaranteed that the repair material does not crack in the early stage.

The invention relates to the technical field of water permeable brick maintenance, in particular to a building water permeable brick production and maintenance device which comprises a bottom plate and a maintenance box, the maintenance box is fixed to the top of the bottom plate, an adjusting mechanism is arranged at the top of the bottom plate, a maintenance mechanism is arranged in the maintenance box, and the adjusting mechanism comprises a supporting seat fixedly arranged at the top of the bottom plate; a motor is mounted in the supporting seat, a circular groove is formed in the top of the supporting seat, a water pump is started, then water in the curing box enters a spray head from a water pipe, and then the water is sprayed to the water permeable bricks on the top of the conveying belt from the spray head, so that water spraying curing of the water permeable bricks is facilitated; the sprayed water flows to the bottom of the curing box from the first water leakage hole and the second water leakage hole and is filtered by the filter screen, and the filtered water enters the spray head again through the water pipe to be sprayed out under the action of the water pump, so that the cyclic utilization of the water is favorably realized.

The invention discloses a calcium carbonate phase change cementing material hardened body as well as a preparation method and application thereof. The preparation method of the calcium carbonate phase change cementing material hardened body comprises the following steps: firstly, uniformly mixing vaterite and a crystal form regulating agent, then adding water, stirring to obtain slurry, after the slurry is formed, carrying out radio frequency heating maintenance with the radio frequency heating frequency of 300KHz-300GHz and the power of 500-900W, and after the radio frequency heating maintenance, carrying out vacuum drying to obtain the calcium carbonate phase change cementing material hardened body. The calcium carbonate phase change cementing material hardened body is prepared. Compared with steam curing, the mode of curing the calcium carbonate phase-change cementing material through radio frequency heating can better promote accumulation of the calcium carbonate phase-change cementing material precursor and conversion of part of the calcium carbonate phase-change cementing material precursor to target mineral aragonite, enables an interface to be fused and bonded, remarkably improves the compressive strength, and is worthy of popularization and application.

The invention relates to a preparation method of a modified waste concrete recycled aggregate, which comprises the following steps: crushing waste concrete, screening the crushed waste concrete with a proper particle size to serve as a raw material of the recycled aggregate, washing with a shaking sieve to remove part of edges and corners about to fall off, and carrying out gelation reaction by using modified solutions such as nano silicon dioxide and water-soluble silicate to obtain the modified waste concrete recycled aggregate. According to the invention, fine pores on the surfaces of concrete particles are blocked and repaired, so that the structure is complete and compact, the mechanical strength of the aggregate is enhanced, the porosity and the water absorption rate are reduced, and the water absorption and the mechanical strength are further reduced through phenolic resin coating. The modified waste concrete recycled aggregate is mixed with cement, zeolite powder and the like, the mixture is pressed into a blank, and the artificial stone with excellent mechanical properties and low water absorption is obtained after carbonization curing. The method provided by the invention has good application prospects and environmental protection significance.

The invention relates to the technical field of building material production equipment, and discloses an automatic high-temperature and high-pressure curing device for a bamboo fiber foaming cement heat preservation external wall panel, which comprises a curing box and a steam generator communicated with the curing box through a steam conveying pipe, a lifting mechanism is slidably arranged at the upper ends of one set of rails, and a rotary maintenance mechanism is fixedly mounted at the upper end of the lifting mechanism. Through the lifting mechanism, the rotary curing mechanism containing the bamboo fiber foaming cement heat preservation external wall panel can be automatically fed into the curing box; when a driving mechanism in the rotary curing mechanism drives a rotary placing frame to slide along an annular sliding groove, the rotary placing frame rotates, so that all parts of the bamboo fiber foaming cement heat preservation external wall panel are in full contact with water vapor, the uniformity and consistency of curing of the bamboo fiber foaming cement heat preservation external wall panel are guaranteed, and the curing efficiency of the bamboo fiber foaming cement heat preservation external wall panel is improved. The quality is good; the maintenance time can be effectively shortened, and the maintenance efficiency is improved.

The present invention discloses a process chamber, semiconductor process equipment and maintenance method, wherein the process chamber comprises a chamber body, a base arranged in the chamber body and a dielectric window arranged on the top of the chamber body, the process chamber further comprises a pressure ring, a cleaning disk and a liquid inlet pipeline, the base is used to carry the cleaning disk during cleaning and maintenance, the cleaning disk is provided with a plurality of spray holes penetrating along the thickness direction thereof, the pressure ring is used to fix the cleaning disk to the base, a gap is provided between the cleaning disk and the base, the gap is connected to the liquid inlet pipeline and the spray holes, the liquid inlet pipeline is used to introduce cleaning liquid, the cleaning liquid can be sprayed through the plurality of the spray holes to cover at least part of the dielectric window. The above scheme can solve the problem of long maintenance time of semiconductor process equipment.

The utility model relates to a wheel technology field, concretely relates to a detachable wheel, including tyre, the inner ring of tyre is equipped with wheel cover, and tyre and wheel cover outer circle seal setting form a plenum, and the inner ring of wheel cover is evenly arranged with countersunk mounting hole along the circumference, and wheel cover is equipped with detachable wheel hub, and detachable wheel hub includes wheel hub outer circle cooperation installation with the inner ring of wheel cover, and wheel hub outer circle is equipped with wheel hub hub core, and the between wheel hub outer circle and wheel hub hub core along the circular center radiation spreads apart a plurality of spoke, and the between two adjacent spokes is equipped with detachable assembly cooperation with countersunk mounting hole. Independent plenum, will not leak in the wheel cover and wheel hub dismounting process. Wheel hub is through detachable assembly and realizes detachable, when wheel hub outer circle, wheel hub hub core or spoke etc. component appears damage, need not to replace whole wheel, only need to dismount and replace damaged wheel hub part, dismount convenient, greatly shorten the maintenance cost and maintenance time short.

The utility model belongs to the field of ore dressing relates to a kind of flotation machine ore separation box, including T-shaped partition, the T-shaped partition is installed in the ore separation box, and the ore separation box is divided into two parts of feed tank and distribution tank;The T-shaped partition includes vertical plate perpendicular to the bottom surface of the ore separation box and horizontal plate parallel to the bottom surface of the ore separation box and fixed on the top of the vertical plate;The length of the vertical plate is equivalent to the length of the ore separation box, the height of the vertical plate is not more than 1 / 2 of the height of the ore separation box;The length of the horizontal plate is equivalent to the length of the ore separation box.The technical scheme of the application can delay the flow rate of ore pulp, which is beneficial to uniform ore separation and improves the flotation effect;At the same time, the ore can be ground, and the bottom plate after modification will not be impacted by the ore pulp.

This invention relates to the field of resource utilization technology for waste soil and discloses a method for combined lithium slag and carbide slag electroosmosis reinforcement of waste soil. The method involves mixing lithium slag and carbide slag in a specific ratio with waste soil to form modified soil with low moisture content, which is then cured using an electroosmosis device to achieve rapid reinforcement and resource utilization of the waste soil.

The invention discloses a concrete venture and creativity product manufacturing process which comprises the following preparation raw materials in parts by mass: 100 parts of water, 300-400 parts of cement and 130-170 parts of sand. The water, the cement and the sand are added into the mold according to the mass ratio and stirred for the first time, the speed of the first time of stirring is 200-500 r / min, and stirring is conducted for 3-5 min; a water reducing agent and a defoaming agent are added according to the mass of the cement in the mold, the mass ratio of the water reducing agent to the cement is 1: (90-100), and the mass ratio of the defoaming agent to the cement is 1: (100-150); stirring for the second time at the speed of 150 to 300 r / min for 2 to 4 minutes; after the second-time stirring is completed, standing is conducted for 1-2 min, then third-time stirring is conducted, the third-time stirring speed is consistent with the second-time stirring speed, and the third-time stirring time is 1-2 min; pouring the creative product at the first time after the third stirring is completed; through the accurate raw material ratio and the repeated stirring technology, it is guaranteed that the concrete creative product is smooth in surface, clear in character and sufficient in strength, and the aesthetic and practical requirements of the creative product are met.

The invention provides a rapid recovery material for a cement stabilized macadam base. The rapid recovery material is prepared from the following raw materials: cement, macadam, medium-coarse sand, zeolite powder, a naphthalene water reducer, an expanding agent and emulsified asphalt in a mass ratio of (160-385): (1030-1088): (512-687): (22-58): (1-2): (4-8): (0-28) (the water-binder ratio is 0.5-0.65). The mortar has the advantages of high fluidity, fast development of early strength, high compressive strength, high breaking strength, high freezing resistance and good adhesion performance of new and old base layer interfaces, and the construction process is simple.

The invention provides a low-moisture curing dealcoholization type silicone sealant and a preparation method thereof. The low-moisture curing dealcoholization type silicone sealant is prepared from the following components in parts by mass: 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 70-140 parts of nano calcium carbonate, 3-10 parts of dimethyl silicone oil, 1-4 parts of modified silicone oil, 3-10 parts of a composite cross-linking agent, 0.5-2 parts of a coupling agent A, 0.5-1.5 parts of a coupling agent B and 2-6 parts of a titanate catalyst, the coupling agent A is one or a mixture of more of gamma-glycidyl ether oxypropyl trimethoxy silane, gamma-glycidyl ether oxypropyl triethoxy silane, gamma-aminopropyl trimethoxy silane and gamma-aminopropyl methyl diethoxy silane, and the coupling agent B is one or a mixture of more of gamma-glycidyl ether oxypropyl trimethoxy silane, gamma-glycidyl ether oxypropyl triethoxy silane, gamma-aminopropyl trimethoxy silane and gamma-aminopropyl methyl diethoxy silane; the coupling agent B is one or a mixture of two of an epoxy silane oligomer and an amino silane oligomer, the structure of the coupling agent B is as shown in formulas I, II and III, and the mass ratio of the # imgabs0 # coupling agent A to the coupling agent B is (0.9-1.3): 1. The silicone sealant prepared by the method can be quickly cured, the curing time is shortened, and the construction efficiency in winter is improved.

This utility model relates to the field of cooling tower technology and discloses a water turbine-driven fillerless spray cooling tower, including a casing. A frame is fixedly connected to the lower surface of the casing. A water inlet pipe is fixed to the inner wall of the frame. One end of the water inlet pipe is connected to a filter pipe via a flange. A filter assembly is installed inside the filter pipe. A connecting pipe is fixedly connected to the inner wall of the casing. A water distribution pipe is fixedly connected to the outer wall of the connecting pipe. A spray nozzle is installed inside the water distribution pipe. A connecting assembly is installed on the outer wall of the spray nozzle. The connecting assembly includes an upper clamping ring and a lower clamping ring. A groove is formed on the outer wall of the upper clamping ring. A locking block is slidably connected to the inner wall of the lower clamping ring. The locking block engages with the groove. A sliding button is fixedly connected to the outer wall of the locking block. In this utility model, operators can quickly disassemble the spray nozzles without tools. The operation is simple and significantly simplifies the cleaning process when the spray nozzles are clogged. The maintenance time is greatly reduced compared to the traditional bolt fixing method, making it especially suitable for operation in confined spaces.

The invention discloses a reactive asphalt cold patch material and a preparation method thereof, and belongs to the technical field of energy-saving and environment-friendly building materials. The cold patch material is prepared from the aggregate, the mineral powder, the filler, the diffusion oil and the asphalt cold patch liquid according to a scientific ratio, and has the characteristics of energy conservation, environmental protection, high strength and durability, excellent adhesive property, construction convenience and high storage stability. The preparation method comprises the steps of aggregate drying, component weighing, stirring and mixing, sealed storage and the like. Comprehensive performance tests show that the cold patch material has excellent performance in the aspects of initial forming stability, compressive strength, durability and the like, is suitable for rapid repair of road pits, and provides an efficient solution for green traffic construction.

The invention relates to the technical field of petroleum drilling and logging, in particular to a petroleum comprehensive logging instrument cable erecting net groove and a net groove erecting method.The petroleum comprehensive logging instrument cable erecting net groove comprises a first steel wire rope, a second steel wire rope, a connecting piece, a first supporting rod and a second supporting rod, the cable erecting device is reasonable and compact in structure, cable erecting of the comprehensive logging instrument is quicker and more convenient, time and labor are saved in installation and disassembly, the cable erecting groove is installed and fixed, then cables and gas sample pipelines are placed in a net groove formed by the connecting piece and the steel wire rope one by one, then the clamping ring is installed, and cable erecting work can be completed; compared with the prior art that cable erection is completed by 4-5 persons in 3-4 hours, the cable erection efficiency is remarkably improved, the erection difficulty is greatly reduced, when the cable goes wrong, the cable does not need to be lowered to the ground from the high altitude, only the clamping ring needs to be loosened, the faulty cable is taken out and replaced, the maintenance is convenient, the maintenance time is short, the efficiency is high, and the maintenance cost is low. The heat dissipation effect of the cable placed in the net groove is better, and the stability of signal transmission is ensured.

This invention discloses a method for repairing asphalt pavement through pipeline excavation, comprising the following steps: S1: Milling and crushing the original road structure in layers to produce old asphalt pavement waste and old base course waste; S2: Excavating a trench downwards from the top surface of the original roadbed, laying a pipeline, and filling the trench to the top surface of the original roadbed; S3: Processing the old base course waste to form recycled aggregate, and then mixing it to form self-compacting concrete; S4: Forming a self-compacting recycled concrete base course above the backfill material; S5: Crushing and screening the old asphalt pavement waste into a first waste with a small particle size and a second waste with a large particle size; S6: Heating the first waste, adding the first aggregate, adding asphalt and a recycling agent, and mixing to form a medium-grained recycled asphalt mixture, forming a recycled medium-grained asphalt concrete surface layer; S7: Heating the second waste, adding the second aggregate, adding asphalt and a recycling agent, and mixing to form a fine-grained recycled asphalt mixture, forming a recycled fine-grained asphalt concrete surface layer, thus completing the pavement repair.

The invention belongs to the technical field of building materials, and particularly relates to a hydraulic binder for a mortar composition and a preparation method of the hydraulic binder. Compared with the prior art, the gelling system prepared from the overburnt magnesium oxide, the soluble phosphate and the appropriate retarder has the advantages that the water demand is extremely low, and the constructability is good; the technical problems that a magnesium phosphate gelling system is too fast in setting and hardening and the ceramic tile adhesive is difficult to construct are solved by adopting the dual effects of the retarder and the inorganic temperature regulator; polyacrylamide and water-absorbent resin are used as thickening agents, so that the ceramic tile adhesive is long in opening time and has the characteristics of rapid hardening and early strength, the maintenance period after ceramic tile adhesion is greatly shortened, and the construction period is greatly shortened; meanwhile, the interior of the binder is compact, a hydration product is resistant to water and high temperature, a magnesium phosphate gelatinization system is basically free of shrinkage and expansion in the long-age volume, the volume stability is good, and therefore the later laying safety of the ceramic tiles is improved.

The application relates to the technical field of bridge expansion joints and discloses a super-high-strength resin elastic concrete for bridge expansion joints, which comprises three components A, B and C, the component A is a main agent, the component B is a curing agent, and the component C is an aggregate; the main agent is a graphene modified epoxy resin; the weight ratio of the component A to the component B is 60-100:30-60; and the total weight of the component A and the component B accounts for 10-15% of the weight of the component C. The super-high-strength resin elastic concrete has high mechanical strength, rut dynamic stability and shear strength with interface concrete, is more durable in use, can absorb impact stress, can be exempted from a steel structure, greatly shortens construction time, has short maintenance time, has no obvious car jumping when a vehicle drives through the expansion joint, has lower noise and is easy to maintain.

This utility model provides a high-precision electrostatic adsorption type Mylar film bonding device, belonging to the technical field of Mylar film bonding equipment. It includes a Mylar film conveyor frame, a lower component conveyor frame, and a roller. The lower component conveyor frame is located below the Mylar film conveyor frame, and a roller is located above the tail of the lower component conveyor frame. A rotating central drive shaft is arranged in a spaced array on the Mylar film conveyor frame. Side conveyor belts are rotatably connected to both ends of the central drive shaft with tension. A central conveyor roller is fixedly connected to the middle of the central drive shaft. An upper guide plate is fixedly connected to the upper side of the tail of the Mylar film conveyor frame. By decomposing the conveying function into a combination of narrow conveyor belts (width ≤ 300mm) on both sides and a central support roller, the non-linear cost increase problem of wide conveyor belts (≥ 1m) is avoided. This solves the problem of high equipment investment where, with the increase in Mylar film size, the unit length cost increases by 1.5-2 times for every 1m increase in conveyor belt width.

The present invention discloses a selective maintenance decision method for a polymorphic system based on an improved mountain climbing algorithm, using the Kolmogorov equation to obtain the probability that the health state level of a component is k at the end of a task to be performed; using the probability to obtain the performance of the component at the end of the task to be performed; using the performance to obtain the performance expectation P of the polymorphic system at the end of the task to be performed; taking minimizing the overall maintenance time T of the polymorphic system as the objective function and taking the performance expectation P greater than the minimum performance required by the task to be performed as the constraint condition, a selective maintenance decision model for the polymorphic system is constructed; using the improved mountain climbing algorithm to solve the selective maintenance decision model, a maintenance strategy for the polymorphic system before performing the task to be performed is obtained. The present invention can minimize the overall maintenance time of the polymorphic system under the premise of ensuring that the performance of the polymorphic system after maintenance meets the requirements of the task to be performed.

This utility model relates to the field of air conditioning, providing a housing assembly and an air conditioner. The housing assembly includes a panel and a maintenance plate disposed on the panel. The panel has a maintenance opening, and the maintenance plate is movably disposed within the maintenance opening. The maintenance plate rotates relative to the panel to open or close the maintenance opening. The panel has a first mounting hole and a mounting groove communicating with the first mounting hole. The maintenance plate has a first connecting portion, which has a first end and a second end. The first end passes through the first mounting hole, extends into the mounting groove, and can rotate within the mounting groove. The second end is connected to the maintenance plate and is disposed outside the first mounting hole. This utility model solves the defects of existing technologies where the maintenance plate needs to be completely removed from the panel, resulting in a cumbersome process, low work efficiency, and inconvenient operation. It optimizes the installation method of the maintenance plate. Based on the rotatable connection between the maintenance plate and the panel, only the maintenance plate needs to be rotated for operation, eliminating the need to completely remove the maintenance plate, thus simplifying the operation process and improving efficiency.

The utility model relates to a kind of broken machine rotor body with variable rotary diameter, it is related to broken machine technical field, including rotating shaft and hammer head assembly being set in the rotating shaft around, and the hammer head assembly is connected between the rotating shaft by telescopic structure.This utility model can make broken machine according to the gap of the clearance of rotor body and broken machine crushing cavity to adjust broken material granularity, reach the substantial increase of broken machine production quantity.Meanwhile, due to the wear of hammer head, hammer head seat can be extended by oil cylinder at any time, the clearance of rotor body and broken machine crushing cavity can be automatically guaranteed, ensure that broken machine production quantity will not be reduced.Meanwhile, hammer head is replaced conveniently, maintenance time is short, and use and maintenance cost are low.

The invention discloses an anti-collision aboveground fire hydrant which comprises a hydrant body and a hydrant base pre-buried in the ground, and the hydrant body is detachably installed on the hydrant base. The hydrant body is provided with a cover cap and a water outlet cover for sealing the water outlet; the fire hydrant further comprises a valve rod, a first bracket, a second bracket and a check valve, the first bracket and the second bracket are installed in the hydrant body, and the check valve is installed in the hydrant base. The first bracket is provided with a first positioning ring through which the valve rod penetrates and slides, the second bracket is provided with a second positioning ring with internal threads, and the lower section of the valve rod is provided with a threaded section; the upper section of the valve rod penetrates through the cap and is connected with the switch, the lower section of the valve rod sequentially penetrates through the first positioning ring and the second positioning ring, and the threaded section of the valve rod is meshed with the internal threads and moves up and down; when the switch is rotated along with the external wrench, the valve rod moves downwards to eject or close the check valve. The fire hydrant can automatically fall off after being knocked down by a vehicle, a water source is closed by opening the water stop valve, and water loss is prevented; maintenance time is short, maintenance is convenient, and cost is low.

This utility model relates to an intrinsically safe dust removal dome camera for mining, including a camera body, a wiper, and a drive mechanism. The camera body is equipped with a dome cover. The drive mechanism includes a motor, a mounting base, a rotating block, and a connecting frame. The mounting base is fixedly mounted on the camera body. The rotating block is rotatably mounted inside the mounting base. The connecting frame is sleeved on the outside of the dome cover and is movably mounted on the rotating block via a slider assembly. It moves radially towards or away from the dome cover. The connecting frame is relatively fixed to the rotating block via a positioning pin. The motor is fixedly mounted on the camera body, and the motor's rotating shaft is fixedly connected to the rotating block. The rotating block drives the connecting frame to rotate around the dome cover. The wiper is detachably mounted on the side of the connecting frame closest to the dome cover. This intrinsically safe dust removal dome camera for mining facilitates wiper maintenance and replacement, is simple to operate, and has a short maintenance time.

The utility model relates to the technical field of square pile production in building foundation engineering, in particular to a square pile forming device with a curing structure, which comprises a curing box and a forming box, the forming box is arranged at the middle end of the top of the curing box, the bottom of the forming box is open, and a feeding groove is formed in the top of the forming box. A mold closing cover plate is installed on the inner side of the feeding groove in an embedded mode, a machine box is arranged at the bottom end of the interior of the curing box, a lifting hydraulic cylinder is arranged at the top of the machine box, a square pile base plate is installed at the top of the lifting hydraulic cylinder, and the square pile base plate is matched with an opening in the bottom of the forming box; a negative pressure fan is embedded in one side of the interior of the curing box; according to the square pile production device, many problems existing in the maintenance stage of a traditional square pile production mode in the prior art are solved, and the problems that the square pile maintenance condition is single, the maintenance efficiency is low, and the formed square pile is prone to cracking in the process of moving to the maintenance position are solved.

This invention relates to a high-performance polymer-cement-based composite repair material and its preparation method. The high-performance polymer-cement-based composite repair material, by mass fraction, comprises the following components: 690-710 parts cement; 130-150 parts fly ash; 45-55 parts silica fume; 200-210 parts mixing water; 950-1050 parts fine aggregate; 21-23 parts modified polymer; 9-10 parts expansion agent; 4-5 parts water-reducing agent; 5-6 parts modified fiber; and 0.16-0.18 parts defoamer. This invention utilizes nano-toughened modified polymer and modified fiber. The nano-modified polymer improves the microstructure of the repair material, while the modified fiber limits shrinkage and enhances the crack resistance of the matrix. The synergistic effect of both effectively improves the toughness and mechanical properties of the repair material, ensuring that early cracking does not occur.

The present invention belongs to the field of power generation wind turbines, and specifically discloses a wind turbine nacelle cover opening device and an opening method thereof, comprising a fixed column, a nacelle cover opening mechanism and a control box, wherein the fixed column is used to be fixed on the bottom of the nacelle, the nacelle cover opening mechanism is installed on the fixed column and comprises a deflection cylinder seat, a deflection assembly and a jacking assembly, the deflection cylinder seat is installed on the top side of the fixed column, the deflection assembly comprises a first deflection cylinder and a second deflection cylinder, the second deflection cylinder is installed on the deflection cylinder seat, and the piston rod end of the second deflection cylinder is connected to the cylinder middle seat; the jacking assembly is used to lift the nacelle cover, and the jacking assembly comprises a jacking cylinder seat, a first jacking cylinder and a second jacking cylinder. The opening device of the present invention can conveniently open the nacelle cover of the wind turbine, the maintenance time is short, the nacelle cover of the wind turbine can be opened conveniently and economically, and there is no need to rent a large crane for land wind power, and there is no need to rent a large ship and an offshore crane for offshore wind power, and the use effect is good.

The utility model discloses a transformer temperature alarm device which comprises an element board, a transformer is arranged on the element board, and a temperature detection module used for detecting the temperature change of the transformer is arranged on the element board on the side edge of the transformer. An alarm mechanism used for giving an alarm when the temperature of the transformer is high is arranged on one side of the temperature detection module, a cooling mechanism used for adjusting the temperature of the transformer is arranged on the periphery of the transformer, and the control end of the alarm mechanism and the control end of the cooling mechanism are electrically connected with the signal output end of the temperature detection module. According to the utility model, the problem in the prior art that maintenance workers need to consume more time for maintenance because a traditional transformer temperature alarm device is not provided with a cooling mechanism is solved. The device has the advantages of simple structure, convenience in use, short maintenance time and the like.

The utility model discloses a railway asphalt crossing, and relates to the technical field of railway crossings. The structure comprises a foundation pit with an upward opening, a concrete cushion layer is laid at the bottom of the foundation pit, a reinforcing mesh is laid on the concrete cushion layer, sleepers are laid on the reinforcing mesh, and steel rails are connected to the sleepers; concrete fillers are poured below the bottoms of the steel rails and in the foundation pit and in gaps between the concrete cushion layer and the reinforcing mesh and between the concrete cushion layer and the sleepers; asphalt filler is laid above the top of the sleeper, in the foundation pit and on the periphery of the steel rail. The railway crossing has the advantages of being good in stability and high in bearing capacity, and the problems that an existing railway crossing is poor in stability, insufficient in bearing capacity and the like are effectively solved.

The utility model relates to the field of preparation of unfired ceramsite, and discloses a curing device for unfired ceramsite. The maintenance device is arranged in an open-air environment and comprises a maintenance bin, the top and the periphery of the maintenance bin have light transmittance, and a maintenance area used for stacking the unfired ceramsite is arranged in the maintenance bin; the heat preservation cover is movably arranged on the periphery of the maintenance bin in a covering mode; the heating component is arranged in the curing bin; and the supporting bottom plate is used for supporting the curing bin, the heat preservation cover and the heating component. According to the scheme, the problems of long maintenance period, high maintenance cost, low production efficiency and the like of the unfired ceramsite can be solved, so that the purposes of improving the quality of finished products, saving the production cost and accelerating the production efficiency are achieved.