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85results about How to "Avoid unloading" patented technology

Load equipment of tunnel lining structural mechanics property simulation test device

The invention relates to load equipment of a tunnel lining structural mechanics property simulation test device. According to the arrangement, a tunnel lining is arranged on a displacement limitation face plate, a load mechanism is radially arranged on the outer surface of the tunnel lining, and the other end of the load mechanism is fixed on an outer retainer plate; the load mechanism is composed of cushion plates, springs and hydraulic jacks, the cushions are arranged along the outer wall of the tunnel lining, the springs are radially arranged on the outer walls of the cushion plates and allow the cushion plates to be connected with the hydraulic jacks, the hydraulic jacks are normally arranged on the outer surface of the tunnel lining, and cylinders of the hydraulic jacks are fixed on the inner wall of the outer retainer plate; under variable work conditions such as different lining types and thickness and different stress conditions, mechanics property simulation is effectively achieved; during the loading, the numerical control hydraulic jacks are adopted to ensure strength and position of stress applied to the lining, bringing convenience to the following data analysis and research, and accordingly the tunnel lining structural mechanics property changes are effectively simulated.
Owner:CHANGAN UNIV

Chain plate conveying coal ball heat conduction oil dryer

A chain plate conveying coal ball heat conduction oil dryer belongs to the field of drying equipment. The chain plate conveying coal ball heat conduction oil dryer comprises a heat insulation outer shell, a chain plate conveying mechanism, a feeding conveying belt, a discharging opening, a heating device and a waste heat using device. The chain plate conveying mechanism comprises a double-driving chain structure, a matched chain wheel, a bearing chain plate and a guiding sliding track. The bearing chain plate is a hollow-out structure formed by a frame and a grid bar and is located on a chain shaft in a hinge mode. The guiding sliding track is divided into an upper sliding track part and a lower sliding track part which have the same structure sequence. Each part is divided into a horizontal section, a V-shaped blanking section and an arc groove-shaped turning section which are connected in sequence. A falling zone corresponds to a lowering edge section of each V-shaped blanking section of the guiding sliding part. The heating device is connecting heat conduction oil furnace heat conduction calandrias which are distributed above and below a conveying interface formed by the bearing chain plate. An improved double-chain strip plate type conveyor is used, a high-efficiency heat conduction oil furnace is used as a heat source, a controllable heat conduction oil pipe composite layer distribution structure is used for improving the heating effect, and the effects of small space size, energy saving and environment protection are achieved.
Owner:HEBEI GOLD BANGZI BOILER

Method of rotary-connection cabin pressure removing of metering feeder and rotary-connection cabin pressure removing dynamic weighing and feeding machine

The invention belongs to the field of machinery, and particularly relates to a method of rotary-connection cabin pressure removing of a metering feeder and a rotary-connection cabin pressure removingdynamic weighing and feeding machine. The weighing and feeding machine comprises a rotary-connection hanging frame, a rotary-connecting material receiving device, a hinge shaft, a rotary-connection weighing and material conveying device, a weighing sensor, a speed sensor and an arithmetic unit, wherein the weighing sensor is arranged at the end part, far away from a feeding machine supporting hinge point, of the rotary-connection weighing and material conveying device, the weighing sensor senses the change of the applied force of the rotary-connection weighing and material conveying device, the weighing sensor cooperates with the speed sensor to calculate the weight of a material conveyed by the rotary-connection weighing and material conveying device through the arithmetic unit. Accordingto the method and the machine, manpower and material resources are saved, a dirty, disorder, bad and abominable labor scene is changed into an environment which is clean, order, free of leaking material, and free of dust, so that the long-term stability and reliability of the weighing are ensured, and the working efficiency and the working quality are improved.
Owner:刘素华

Fault ride-through implementation method and system for direct-driven draught fan

The embodiment of the invention discloses a fault ride-through implementation method and system for a direct-driven draught fan. The direct-driven draught fan is connected with the direct-current side of a grid connection converter, and the line side of the grid connection converter is connected with a grid system. The method comprises the steps that the grid connection point voltage of the line side of the grid connection converter is detected; whether the grid connection point voltage is in a preset grid voltage limit value interval or not is judged; if the grid connection point voltage is not in the preset grid voltage limit value interval, the direct-current bus voltage of the direct-current side of the grid connection converter is calculated; according to the relation between the direct-current bus voltage of the direct-current side of the grid connection converter and a preset direct-current bus voltage limit value, electric energy discharged by the direct-driven draught fan is absorbed from the direct-current bus through a flywheel energy storage converter connected to a direct-current bus in parallel or electric energy is discharged to the grid system connected to the line side of the grid connection converter through the direct-current bus. According to the fault ride-through implementation method and system for the direct-driven draught fan, the direct-current bus voltage can be balanced, the fault ride-through capacity of the direct-driven draught fan is improved, and the safety and stability of operation of the grid system are improved.
Owner:YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST

Separated roll-up device for plastic bags

InactiveCN102180369ASimple structure and principleStrong production applicabilityWebs handlingGear driveEngineering
The invention discloses a separated roll-up device for plastic bags, which mainly consists of a frame, a four-position rotary table device, a roll-up driving device, a roll-up conversion device, an ejector roller device and a partial position rotary table mechanism. In the rolling process, the roll-up conversion device drives a rack by a rack driving cylinder and a gear drives an overturning cover to overturn. The number of the rolled bags can be controlled simply by setting overturning moment of the overturning cover. The number of the rolled bags is simple and convenient to control. In the whole rolling process, the flexibility is high. The overturning structure principle is simple. The separated roll-up device is easy to manufacture. Moreover, the ejector roller device of the separatedroll-up device adopts an ejector roller cylinder as a power source, so that the situation that due to an excessively high pressure of the ejector roller, the whole roll of bags are excessively compact and are difficult to discharge or cannot be discharged after the bags are rolled up can be avoided. Due to the four-position rotary table device, a roll-up machine is ensured to work continuously inthe whole rolling process, so that a great amount of time is saved and the production efficiency is improved.
Owner:厦门亚太创新机器有限公司

Full screen mobile phone

The invention discloses a full screen mobile phone. The full screen mobile phone comprises a first support plate, a second support plate, a rotating shaft assembly for connecting the first support plate and the second support plate, and a flexible screen, the rotating shaft assembly is located between the first supporting plate and the second supporting plate. The two ends of the flexible screen are connected with the first supporting plate and the second supporting plate respectively. The rotating shaft assembly comprises a first rotating shaft mechanism, a second rotating shaft mechanism anda connecting plate, the two ends of the connecting plate are connected with the first rotating shaft mechanism and the second rotating shaft mechanism respectively, the middle of the upper end face of the shell, the middle of the upper end face of the friction plate and the middle of the upper end face of the elastic pressing plate are respectively provided with an arc-shaped groove, and the connecting plate is provided with a groove for embedding the flexible screen. According to the invention, when the mobile phone is completely unfolded, the flexible screen is prevented from being stretched to cause damage to the screen, and when the mobile phone is folded, the flexible screen is prevented from being extruded to cause damage to the screen, so that the service life of the flexible screen is prolonged, and the aesthetic property of the flexible screen in the use process is ensured.
Owner:KUNSHAN KERSEN SCI & TECH

Feeder capable of reversely conveying materials, dropping materials from inclined side, reducing interferences and dynamically weighing and metering

The invention discloses a feeder capable of reversely conveying materials, dropping materials from an inclined side, reducing interferences and dynamically weighing and metering. The feeder comprisesa reverse conveying rack and a weighing conveyor, wherein the reverse conveying rack comprises a reverse-guide inclined-side-dropping receiver and a rack guide slot; the weighing conveyor comprises areverse-extending conveying device, a drive device and a weighing device; the reverse-guide inclined-side-dropping receiver comprises a hanging inclined plate guide slot part, an inclined plate reverse-guide part and an inclined-side reverse dropping hole part; a dropping hole of the inclined-side reverse dropping hole part is formed in a direction reverse to a material moving direction; a weighing sensor supports the reverse-extending conveying device to integrally weigh materials and the reverse-extending conveying device; while inducting weight of flowing materials, the weighing sensor is matched with a speed sensor for weighing the materials, so that effects of reversely conveying materials, dropping materials from the inclined side, reducing interferences and dynamically weighing andmetering are achieved; and hardness and adhesion force of the materials on the weighing conveyor belt are different when the temperature of the conveyor belt changes as tightening force of the conveyor belt is different, so that weighing precision is improved by tens of times.
Owner:刘素华

Load-shedding control method with consideration of system voltage stability after photovoltaic access

The invention, which belongs to the technical field of the power system and automation thereof, discloses a load-shedding control method with consideration of system voltage stability after photovoltaic access, so that the adverse influence on high-voltage grid voltage recovery after a fault by large-scale photovoltaic access to the grid is eliminated. An equivalent local grid static voltage stability index of an external network is calculated to determine a voltage instability situation; a dominant factor of voltage instability is identified based on a characteristic change of reactive power absorbing by a photovoltaic aggregation station after the fault; and then load-shedding control strategies are formulated on the condition of using a photovoltaic factor as the dominant instability factor and using a cross-section factor as the dominant instability factor, thereby realizing load-shedding control of the voltage weak node load. Therefore, the power system scheduling operation staff can obtain the inherent operation rule of the photovoltaic access system and the foundation is laid for formulating a load-shedding optimization strategy cooperatively, so that the effectiveness and automation level of secure and stable control of a large grid are improved.
Owner:NARI TECH CO LTD +2

Sintered finished ore unloading system and brake

The invention discloses a sintered finished ore unloading system which comprises a horizontal steel rail, a movable ore unloading trolley and a brake. The movable ore unloading trolley is arranged on the horizontal steel rail, and the brake comprises a mounting base, a first electromagnet, a second electromagnetic, electromagnetic coils and a brake portion; the mounting base is fixed onto the movable ore unloading trolley; the first electromagnet is fixed onto the mounting base; the second electromagnet is arranged on the mounting base and can move along the vertical direction, the first electromagnet and the second electromagnet are distributed up and down in the vertical direction, a movement gap is formed between the first electromagnet and the second electromagnet, and a compression spring which retains the movement gap is sleeved on the first electromagnet and the second electromagnet; the electromagnetic coils are wound on the first electromagnet and the second electromagnet along the same direction; the brake portion is connected with the second electromagnet and moves along the second electromagnet, so that the brake portion and the horizontal steel rail can be separated from each other or can cling to each other in a brake manner. The invention further discloses the brake. The sintered finished ore unloading system and the brake have the advantages that the movable ore unloading trolley can be effectively and accurately stopped, accordingly, unloading problems due to the fact that an existing movable ore unloading trolley cannot be stopped accurately can be solved, and production accidents due to the fact that the existing movable ore unloading trolley cannot be stopped accurately can be prevented.
Owner:ZHONGYE-CHANGTIAN INT ENG CO LTD

Carbide slag dry power anti-blocking device and carbide slag dry power storage method

The invention relates to the technical field of carbide slag, in particular to a carbide slag dry power anti-blocking device and a carbide slag dry power storage method. The carbide slag dry power anti-blocking device comprises a carbide slag reservoir, a discharging device, a buffer bin, a sealed discharging tube and a lifter; a material baffle is fixed in the carbide slag reservoir, and the twosides of the material baffle are provided with discharging ports; a discharging tube is arranged below the carbide slag reservoir; and at least one group of discharging devices communicated with the discharging port and the discharging tube is fixedly installed at the bottom of the carbide slag reservoir through a support frame. The carbide slag dry power anti-blocking device and the carbide slagdry power storage method have the benefits that the structure is reasonable and compact, and the use is convenient; through the matching use of the discharging device, the buffer bin, the sealing discharging tube, a three-way material division valve and the lifter, the carbide slag dry power is always in a flowing state; and gas released by the carbide slag dry power and water vapor are discharged by a first dust collector motor and a second dust collector motor, so that unsmooth discharging, personnel poisoning and explosion caused by easy blocking of the dust collector motor are prevented, the production efficiency is improved, and the potential safety hazards are reduced.
Owner:新疆天山水泥有限责任公司

Self-unloading crane

The invention discloses a self-unloading crane. The self-unloading crane comprises a rack body. A lifting plate is arranged on the rack body. A self-unloading mechanism is arranged at the upper end ofthe lifting plate. A control mechanism installation platform is further arranged on the rack body and comprises a brake handle, a handle and a straight pin, wherein the handle is used for starting upa crane boom, and the straight pin is fixed to the middle of the control mechanism installation platform. The self-unloading mechanism comprises a rotary block installation base, a rotary block, a shaft sleeve assembly, a hinge pin assembly, a rotary base and a distance adjustment assembly, wherein the rotary block installation base is fixedly installed at the top end of a lifting plate, the rotary blocks is rotationally connected to the rotary block installation base, the shaft sleeve assembly is fixedly installed on the rotary block, the hinge pin assembly is used in cooperation with the rotary block, the rotary base is rotationally connected to the top end of the lifting plate, a limiting pin is arranged on the rotary base, a through hole is formed in the part, beside the limiting pin,of the rotary base, a rotary block reset spring is further arranged on the rotary block installation base, and a positioning hole is formed in the rotary block. The self-unloading crane is reasonablein design, convenient to operate for hoisting, and wide in application range.
Owner:赣榆区海头镇钦法电动车销售门市

A downhole digital power supply system

The invention provides a downhole digital power supply system including a mud generator and a rectifying module connected to the output end of a mud generator. The rectifying module converts the induced alternating current generated by the mud generator into rectified current and outputs the rectified current. The rectifying module also includes a compensating fluctuation switch which conducts when the voltage amplitude of the induced alternating current output by the mud generator exceeds a preset range. A power load is connected to an output end of the rectifier module via a compensating fluctuation switch to be turned on. When the rotor and turbine blades of the mud generator are out of sync, the voltage amplitude of the induced alternating current output from the mud generator is not within the preset voltage amplitude range, At this time, that compensate fluctuation switch is turned on, so that the rectify electricity output by the rectifier module is connected into the power load, and at this time, the dynamic load of the mud generator instantaneously increases the rotational speed of the rotor is instantaneously reduced, the rotor tends to be stable, and then the turbine blades drive the rotor to increase the rotational speed through magnetic coupling, and in this process, the turbine blades and the rotor tend to be synchronous.
Owner:GUANGDONG PULUO MEASUREMENT & CONTROL TECH
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