Steel -concrete combined beam bridge

The utility model discloses a steel -concrete combined beam bridge, including concrete bridge panel and main steel beam, the concrete bridge panel includes reinforced concrete and is fixed in the bottom plate of the steel construction of reinforced concrete bottom, main steel beam includes that liang tiji is fixed in the roof at roof beam body top, high strength bolt by evenly distributed betweenbottom plate and the roof is connected, the width of bottom plate is less than the width of roof, just be equipped with the angle welding between bottom plate edge and the top plate surface, the utility model discloses can reduce wet seam quantity under the prerequisite of the reliability of ensureing steel reinforced concrete connection performance and durability.

Full-automatic membrane uniformity tester

A full-automatic tester of film uniformity for film plated glass features that automatic infrared scanning technique is used and test and result display are automatically completed by computer. Its advantages are high test speed, high accuracy, no damage to glass and no influence from human and environmental factors.

Chain tensioning device and scraper conveyor with same

The invention discloses a chain tensioning device and a scraper conveyor with the same. The chain tightening device comprises a motor serving as a power source of the chain tightening device; the power output end is in driving connection with the motor; and the controller is in control connection with the motor. The chain tightening device is electrically driven, and is compact in structure and flexible in arrangement mode; and under special working conditions such as heavy load, the function of auxiliary driving can be achieved. Meanwhile, a traditional complex hydraulic device is replaced, and the problems of liquid leakage and the like are solved. The system can be connected to a control system online, and online standing and intelligent operation are achieved.

Direct starting method of fuel cell system

The invention relates to a fuel cell system and a direct starting method adopted by the fuel cell system. The method is used for realizing normal starting of a fuel cell under outfield deficient starting conditions in order to make the system normally run, and is a starting method for starting the fuel cell system without external power supply. Small DC/DC is used to drive a blower to start by using voltage output by an internal built-in control power supply according to demands of the blower. The fuel cell system can normally run due to continuous air supply after the blower is started, and after large DC/DC is started, the large DC/DC power on the blower, and the small DC/DC is cut off, so the system normally runs.

Communication system for in-situ maintenance of electric distribution terminal

The invention relates to a communication system for on site maintaining terminal of power distribution used in area of electrical power. The system includes two infrared transceivers. The infrared transceiver located in the inside of terminal of power distribution includes transition switch of communication mode for maintenance port, infrared transmitting unit, and infrared receiving unit. Through transition switch of communication mode for maintenance port, the input end of infrared transmitting unit and output end of infrared receiving unit are connected with the maintenance port in series.Another infrared transceiver includes infrared transmitting unit, infrared receiving unit and RS232 interface. The system has advantages of convenient maintenance in site and raised communication reliability.

Software online updating process

An adjusting system for air supply of fuel battery system

Air supply system for low-voltage fuel battery

Software online updating process

The invention discloses a method for software online upgrading comprising, marking-out an area in the allocable zone of the terminal module for storing download program supervisory structure variable, transmitting the upgrading program to terminal module and storing it in the allocable zone, assigning value for the member variable of the download program supervisory structure variables, and storing it into the allocable zone, halting the operation to watchdog, reseting CPU after a preset-time to restart the terminal module, reading the download program supervisory structure variable which hasbeen assigned an initial value and determining the program flow path based on the value of its structure member. The invention can improve working efficiency.

配电终端现场维护通讯系统

... 本发明公开了一种电力领域中的配电终端现场维护通讯系统，包括红外收发器(I)和红外收发器(II)；红外收发器(I)位于配电终端内部，包括维护口通讯方式转换开关(A)、红外发射单元(B)和红外接收单元(C)；红外发射单元(B)的输入端和红外接收单元(C)的输出端通过维护口通讯方式转换开关(A)与配电终端的维护口串联；红外收发器(II)包括红外发射单元(B)、红外接收单元(C)和RS232接口；从而方便了现场维护、提高了通讯可靠性。 ...

Rope device is carried in overspeed governor check -up special use

The utility model discloses a rope device is carried in overspeed governor check -up special use, it contains first grip block (1) and second grip block (2) of mutual butt joint, first grip block (1) and second grip block (2) between connect fixedly soon through double -screw bolt (3), the one side of second grip block (2) outwards buckle grip block lug (4), bridle port (5) have been seted up at the middle part of grip block lug (4), are provided with rope (6) in this bridle port (5), rope (6) pass and fixed buckle (7), its both ends are passed through copper pipe box (8) and are compressed tightly fixed connection. The utility model discloses simple structure, the reliable and stable while of clamping -force effectively protects wire rope not harmd again, owing to be equipped with certain contained angle between second grip block and the grip block lug and guarantee to keep when drawing the overspeed governor rope its vertical position to avoid causing and buckle carrying as far as possible ...

Multi-span rigid frame bowstring arch bridge

The invention discloses a multi-span rigid frame bowstring arch bridge. The multi-span rigid frame bowstring arch bridge comprises a cross beam, two side piers, a middle pier which is arranged between the two side piers, a main arch rib which connects the side piers and the middle pier and a suspender which connects the main arch rib and a bridge deck slab; the cross beam are upward supported by the two side piers and the middle pier. The multi-span rigid frame bowstring arch bridge comprises a through type tie bar; the tie bar penetrates the two side piers and the middle pier; two ends of the tie bar are anchored on the two side piers. The multi-span rigid frame bowstring arch bridge solves the problem that an impost fastening position of the middle pier of a through type multi-span rigid frame bowstring arch bridge is complex in structure and stress, improves the structural safety, meanwhile reduces the structural size of the middle pier and is good in landscape effect.

Starting method of fuel cell system

The invention relates to a starting method of a fuel cell system. The method is used for realizing normal starting of a fuel cell under outfield deficient starting conditions in order to make the system normally run, and is a control method for starting the fuel cell system without external power supply. A small fan for internal power supply is used to provide air for the system in a starting stage, DC/DC powers on a system blower after the system reaches starting conditions to make the blower provide air for the system, and then the small fan is cut off, so the system normally runs.

Belt conveyor and tensioning control method thereof

The invention discloses a belt conveyor and a tensioning control method thereof. The belt conveyor comprises a conveying belt and a tensioning device connected with the conveying belt. The tensioning control method comprises the steps that when the tensioning device receives a shutdown signal of the belt conveyor, the tensioning device executes belt loosening operation, and after the conveying belt tension value from belt loosening to a conveying belt is smaller than a set tension value, the belt loosening operation is stopped; and when the tensioning device receives a starting signal of the belt conveyor, the tensioning device executes the belt tightening operation, and stops the belt tightening operation after the conveying belt tension value of the belt tightening to the conveying belt is larger than the set tension value. According to the method, the starting/stopping signal of the conveyor serves as a tension adjusting control signal, tension adjustment during starting and stopping ...

Aircraft auxiliary power device and combined type mixed flow turbine

The invention discloses an airplane auxiliary power device and a combined type mixed flow turbine, and belongs to the field of airplane auxiliary power equipment. The airplane auxiliary power device comprises a combined type mixed flow turbine, and the combined type mixed flow turbine comprises a front-row rotor and a rear-row rotor which are connected with each other; a plurality of blades are uniformly distributed on the front-row rotor and the rear-row rotor respectively; the front-row blades on the front-row rotor and the rear-row blades on the rear-row rotor are matched with each other to form a serial blade grid; the inlet and outlet fall of the turbine rotor is mainly distributed on the front-row rotor; blade bending angles of the turbine rotor are mainly distributed on the rear row rotor. A traditional mixed-flow turbine is improved to be of a split combined structure, serial blade grids are adopted for blades, and rotor disc bodies are two independent equal-strength discs; structurally ...