834results about How to "Reduce maintenance rate" patented technology

The invention provides a central air conditioner and a method for controlling the flow of a refrigerant therein. The central air conditioner comprises an evaporator, a condenser, an electronic expansion valve, a liquid level meter and a controller, wherein the electronic expansion valve is connected to a refrigerant pipeline between the evaporator and the condenser; the liquid level meter is connected with the evaporator or the condenser; the controller is used for controlling the opening of the electronic expansion valve and is provided with an input port and an output port; the input port of the controller is connected with a signal sending end of the liquid level meter; and the output port of the controller is connected with a signal receiving end of the electronic expansion valve. Themethod comprises the following steps of: at the operation stage of the central air conditioner, sending a real-time refrigerant liquid level L1 of the evaporator or the condenser detected by the liquid level meter to the controller; and comparing L1 with a first target liquid level L and adjusting the opening of the electronic expansion valve according to a comparison result to ensure that L1 approaches L and is finally equal to L by using the controller. The liquid impact of a pressing machine can be avoided, and the control accuracy of the flow of the refrigerant is improved.

The invention discloses a low-speed high-pressure vane pump for hydraulic bicycles. The invention comprises an end cover, a principal axis, a framework oil seal, a right casing, a blade, a middle casing, a left casing, a bearing, an O-shaped sealing ring, a bolt, a pressure-limiting spring, a spring seat, a regulating nut, a side end cover, a rotor, a stator, a slide block, a cover plate, a flow adjusting screw, a sealing ring, a lock nut and a needle roller. The invention is characterized in that: a vane groove is arranged in the rotor, a vane spring and a vane bracket are arranged in the vane groove, the vane bracket is positioned by the vane spring, the blade is arranged in the vane groove of the rotor, one end of the blade presses the vane spring, while the other end clings to the inner surface of the stator. The low-speed high-pressure vane pump for the hydraulic bicycles has the advantages of reasonable structure, light self-weight, small bulk, high efficiency, low cost, labor conservation and rapidness, which is adopted to be matched with all wheel diameters of bicycles and has the function of pressure servo variation.

The invention discloses a process for producing a Czochralski silicon single crystal, which comprises the following steps of: 1, preparing a silicon raw material and a doping agent; 2, charging; 3, vacuumizing; 4, melting; 5, extracting slag, namely 501, performing cooling crystallization, 502, gradually heating, and keeping the crystallization process continuously performed until insoluble substances floating on the surface of a silicon melt are completely condensed by the crystal, and 503, taking the crystal out, and removing the slag; and 6, performing subsequent treatment, namely finishing crystal leading, shoulder expanding, shoulder rotating, diameter equalizing, ending and blowing down processes in turn by using a single crystal furnace according to the conventional treatment process of a Czochralski method to obtain the finished silicon single crystal formed by pulling. The process is reasonable in design, simple in steps, convenient to implement, easy to master and good in using effect, can effectively ensure the quality of the produced silicon single crystal, and can solve the practical problems that slag removing time is difficult to master, the slag extracting effect is poor, the produced silicon single crystal has low purity, and the like.

The invention relates to a pipe communication splice welding pressure-bearing type heat exchanger, which comprises tap water heat absorption pipes. Heat supply pipes are arranged in the tap water heat absorption pipes. The tap water heat absorption pipes are communicated through tap water communication pipes. The heat supply pipes are communicated through heat supply pipe communication pipes. The seal heads of the tap water heat absorption pipes are outwardly flanged and embedded in the ports of the tap water heat absorption pipes. The flanges of the seal heads of the tap water heat absorption pipes and the port edges of the tap water heat absorption pipes are in splice bilateral alignment edge-kneading welding connection. The walls of the tap water heat absorption pipes are punched and inwardly flanged. The tap water communication pipes are inserted in the punches of the tap water heat absorption pipes. The port edges of the tap water communication pipes and the punched inward flanges of the tap water heat absorption pipes are in splice bilateral alignment edge-kneading welding connection. Heat supply pipe blocking plates are embedded in the ports of the heat supply pipes. The heat supply pipe blocking plates are outwardly flanged. The outward flanges of the heat supply pipe blocking plates and the port edges of the tap water heat absorption pipes are in splice alignment edge-kneading welding connection. According to the pipe communication splice welding pressure-bearing type heat exchanger disclosed by the invention, two technical defects of higher water leakage ratio of the welding line and incapability of continuously producing hot water of the original patent product can be solved; and the heat exchanger has the advantages of no leakage and continuous hot water production.

The composite parabolic light focusing solar rice cooker includes pressure rice cooker and square heat collector array comprising composite parabolic light focusing units. The pressure rice cooker has housing, rice utensil frame, water tank, water pipeline and heat exchanger. The heat exchanger has its two ends extending beyond the housing and connected to the medium input pipe and output pipe of the square heat collector array to form the medium flow loop, in which there are medium storage and circulating pump. The present invention performs heat exchange between heat medium inside the loop and water around the heat exchanger to evaporate water and the heat medium may be scale-proof and cold-proof medium for convenient use. The composite parabolic light focusing units have antiageing light condensers and long period high heat collecting efficiency.

The invention discloses a method to raise production efficiency of czochralski silicon mono-crystal. The method comprises the following steps: 1. preparation of silicon raw material and a doping agent; 2. charging; 3. processing in a mono-crystal furnace: completing processes of furnace mixing, vacuum-pumping, stock melting, seeding, diameter controlling, casting speed increase and equal diametergrowth, according to a routine processing technology of a czochralski method; 4. post processing: first, a graphite thermal field system of the mono-crystal furnace is closed to lower thermal power of the mono-crystal furnace to zero; then residual silicon melt surface in a quartz crucible begins to crystallize, and when the crystals are about to contact silicon mono-crystals, the mono-crystals are lifted from the silicon melt liquid surface rapidly; last, crystal lifting and crystal collection are carried out to obtain silicon mono-crystal finished product. The invention has the advantages of reasonable design, simple method steps, convenient realization, easy grasp, good usage effect. An ending process of crystal drawing is omitted to increase production efficiency, so as to solve the problem that czochralski silicon mono-crystal production efficiency is restricted by a demanded ending process in the silicon mono-crystal production process.

The invention relates to a process method for cogenerating electricity, charcoal, heat and a fertilizer through gasified gas supply of biomass. The process method is characterized by carrying out gasifying by a self-drying and spouting multi-cogeneration gasifier so as to prepare hot combustible gas as fuel of a boiler, and enabling steam generated by the boiler to propel a steam turbine to generate electricity, thereby obtaining four products, i.e., electricity, charcoal, heat and a crude fertilizer simultaneously. The process method comprises the process steps: carrying out biomass pretreatment (collecting and chipping); gasifying the biomass in the multi-cogeneration gasifier; collecting the crude fertilizer; supplying the hot combustible gas, obtained after gasifying, to a gas-fired boiler through a combustor; cooling and collecting biomass charcoal; and enabling the steam generated by the boiler to propel the steam turbine for electricity generation and heat supplying. The process method has the advantages that three kinds of residues of agriculture and forestry are adopted as a raw material, so that environmental protection and the resource-converting utilization of the three kinds of residues of agriculture and forestry are facilitated; and the process is stable in operation, high in hot-combustible-gas combustion heat efficiency, diverse in product and good in economic benefit and is applicable to large-scale application.

The invention provides an improved water chestnut harvester. The improved water chestnut harvester is characterized in that a collecting mechanism (8) controlled and lifted by a hydraulic cylinder (10) and a filtering water intake device (9) are arranged at two ends of a rack (1); a conveying mechanism (11) is arranged in the middle of the rack (1), a water tank (12) is arranged between the conveying mechanism (11) and the collecting mechanism (8), and a discharge port (121) is formed in the water tank (12); an engine controls operation of a transmission device (6) through a reduction gearbox,the transmission device (6) drives the collection mechanism (8), the conveying mechanism (11) and the filtering water intake device (9) to work, and the engine drives a water pump (51) to work; the engine drives the collecting mechanism (8) to collect water chestnuts, the collected water chestnuts with mud are sent to the water tank (12) for high pressure washing, the washed water chestnuts are output from the discharge port (121) and poured into a collecting basket (15) by the conveying mechanism (11). The collected water chestnuts are good in integrity, and the process of cleaning again inthe later stage is omitted.

The lining and assembling machine with pressurized sealed oil tank belongs to tunnel engineering constructing machinery. The connecting mode includes setting the cantilever beam and the oil tank cantilever beam in the same side of the disk, driving the disk with the rotating driver, setting the electric control assembly on the top of the oil tank steel structure, setting the hydraulic pump set on the top of the oil tank cantilever beam, setting the pressurized sealed oil tank inside the steel structure of the oil tank steel structure, welding the guide barrel on one side of the cantilever beam, fixing the elevating oil cylinder onto the outside of the guide barrel, setting the elevating beam below the elevating oil cylinder, screwing the translating mechanism in the lower part of the elevating beam, setting the translating oil cylinder in the middle of the translating mechanism, and setting two pipe wrench beside the translating oil cylinder. The present invention has simple structure and high construction speed.

The present invention discloses a complex force field spiral chute for ore dressing, and fine particles can be effectively prevented from entering into a tailing zone. The spiral chute comprises a channel steel support, an ore-feeding device, magnetic poles, a pulsating pressure water tank, a spiral blade, an ore dividing bucket, an ore intercepting bucket and an ore receiving bucket. The permanent magnetic fixed magnetic poles are installed at an external portion of a spiral blade of an existing spiral chute, so that magnetic fine particles in magnetic mineral can be forced by an inward-radial magnetic retentive force to enter into a concentrate zone under the function of an applied magnetic field. The pulsating water tank is installed at the bottom of a spiral surface, ore particles are prevented from rubbing with the spiral surface, so that the ore particles can be well layered and separated conveniently, and equipment abrasion can be eliminated conveniently. Concentrate grades can be improved, concentration ratio can be increased, mineral recovery rates can be improved, an existing spiral ore dressing technology can be simplified, and equipment maintenance rates and equipment power consumption can be reduced.

The invention provides a lamp body. The lamp body is used for supporting a light-emitting diode (LED) module. The lamp body comprises a plastic casing and a radiator installed in the plastic casing so as to absorb heat generated by the LED module, and heat dissipation holes for dissipating head absorbed by the radiator are arranged outside the plastic casing. The lamp body enables heat emitted by a lamp to be dissipated through the radiator, heat exchange is performed with the outside through the heat dissipation holes positioned on the plastic casing, the temperature of the casing is not high while heat dissipation is guaranteed, and people do not feel hot when touching the casing. The invention further provides an LED bulb where the lamp body is applied. The skin is not scalded when people touch the casing in the process of replacement, trial and maintenance and the like, the problem that the bulb is dropped and broken due to scalding is solved, and the maintenance rate of the bulb can be effectively reduced.

The invention provides a tensile force alarm device, which can solve the problems of cost increment and easy occurrence of potential safety hazard caused by easy breakage of cables of construction machines existing in the prior art. The tensile force alarm device is arranged on the construction machine, effectively prevents the cables from being broken, reduces cable damage rate and mechanical maintenance rate, and prolongs the service life of the cables. The invention adopts the technical following scheme that: the tensile force alarm device comprises a shell part, a pull rod part, a deflector rod part, an alarm part and a fixing part, wherein the shell part comprises cover plates and a base which are hermetically connected; the pull rod part comprises a pull rod capable of moving up and down according to external tensile force; the deflector rod part comprises a deflector rod, a compression rod and a rotary support, and the deflector rod receives the tensile force of the pull rod to drive the compression rod and the rotary support to swing; the alarm part comprises a toggle switch, an alarm circuit module and a loudspeaker which are electrically connected, and the toggle switch receives motive power of the rotary support to change state; and the fixing part comprises a drag hook and at least one lengthened screw, and the lengthened screw passes through the base.

The invention relates to an automatic bottle dropping mechanism of a plastic hollow container blowing and stretching machine, which comprises a machine frame. The machine frame is provided with a blowing and stretching system and a bottle pipe heating system; and the blowing and stretching system comprises a front template, a middle template, a rear template, a mould opening and closing mechanism and a blowing and stretching mechanism, wherein the mould opening and closing mechanism drives the templates to move; and the bottle pipe heating system comprises a transporting mechanism consisting of a chain wheel, a chain and power, and a heating device consisting of a bracket and a lighting tube. The mechanism is characterized in that a fixing plate is arranged on the side of the front template and connected with a supporting plate; a straight line guide rail is arranged in the supporting plate; a guide rod moving up and down is arranged in the straight line guide rail; the lower part of the guide rod contacts a lifting jacking block or a cam on the machine frame; a bottle dropping fork is arranged on the upper part of the guide rod; the opening part of the bottle dropping fork is matched with a convex ring of a plastic container; and a transverse bottle pushing device is arranged on the top of the guide rod. The bottle dropping fork arranged on the guide rod is directly driven by the self opening and closing movement of the front template to realize dropping the bottle without time difference. The mechanism does not need additional power, such as a cylinder and the like and has the advantages of simple structure and cost conservation.

The invention relates to the field of oil/gas field blowout work depressurizing and provides a hierarchical-depressurizing oil nozzle manifold which comprises a manifold pipeline, a first adjustable oil nozzle connected with the manifold pipeline through a first flat-plate gate valve, a first fixed oil nozzle connected with the manifold pipeline through a second flat-plate gate valve, a second adjustable oil nozzle and a second fixed oil nozzle. The first adjustable oil nozzle and the first fixed oil nozzle are disposed on two sides of the manifold pipeline respectively, and the second adjustable oil nozzle and the second fixed oil nozzle are disposed on the two sides of the manifold pipeline respectively. By the hierarchical-depressurizing oil nozzle manifold, after multistage depressurizing and multiple pressure adjusting of high-pressure fluid during incoming, connection pressure reduction of a pipeline manifold and other parts is prolonged, or part replacement and maintenance probability is reduced, so that production efficiency is improved; due to preferable processing and careful material selection, technical effect of depressurizing of the manifold is better, and the advantages include but are not limited to that service lives of the above parts are prolonged, depressurizing effect is improved, and performance-cost ratio is high.

The invention relates to a transmission gap adjusting mechanism of a gantry numerical control cutting machine, which is mainly as follows: bearings are mounted in a mounting seat, a spacing sleeve is used for positioning between the bearings, the spacing sleeve compresses outer rings of the bearings, a speed reducer is fixed on the mounting seat, a gear is connected with an output shaft of the speed reducer, a fixed seat is arranged in a copper sleeve, the mounting seat is connected with the fixed seat by a rotating shaft, the fixed seat is mounted on a frame by a first bolt and a second bolt, a screw rod is screwed in the frame, a spring is arranged in the screw rod, a nut is screwed in and compresses the gear, and the gear is meshed with a rack. The first bolt is used for regulating the verticality between the gear and the rack. The transmission gap adjusting mechanism of the numerical control cutting machine has simple structure, convenient regulation and large assembly space, and can facilitate the processing of the frame, improve the rigidity of the frame, reduce the phenomenon of fracture of the expensive output shaft of a reduction gearbox, reduce the maintenance ratio of replacing the reduction gearbox, further reduce the manufacturing cost and improve the product quality.