31results about How to "Avoid repair work" patented technology

The invention discloses a device for delaying MBR (membrane bioreactor) membrane contamination and blocking. The device comprises an MBR membrane assembly, an MBR membrane frame body, a moving frame,a driving device and two parallel support rails, wherein the moving frame and the two parallel support rails are glidingly matched; the MBR membrane assembly is placed in the MBR membrane frame body;the MBR membrane frame body is fixedly connected with the lower side of the moving frame; the driving device is fixedly arranged on a connecting beam arranged between the two support rails and can drive the moving frame to do reciprocating movement along the support rails. The invention also provides a method for delaying the MBR membrane contamination and blocking. The MBR membrane assembly vibrates in an MBR by the driving device; vibration water flow is generated; the MBR membrane assembly is continuously flushed; meanwhile, membrane wires mutually collide and rub, so that the contaminationand blocking of the MBR membrane is delayed. The device and method for delaying the MBR membrane ontamination and blocking have the advantages that the cost is low; the energy consumption is low; theeffect of delaying the membrane contamination and blocking is good; the MBR membrane contamination and blocking can be delayed on the premise of ensuring the low-dissolved oxygen concentration environment in the MBR.

The invention provides a multi-stack integrated long-life fuel cell system, and belongs to the technical field of fuel cell engines. The multi-stack integrated long-life fuel cell system comprises a hydrogen subsystem, an air subsystem, a thermal management subsystem, an engine control module and a plurality of power output sub-modules connected in parallel and composed of stacks and DC-DC modules. The positive electrodes and the negative electrodes of the stacks are connected with the input ends of the corresponding DC-DC modules, and the output ends of the DC-DC modules are connected to a same group of lines; the hydrogen subsystem, the air subsystem and the thermal management subsystem are all connected with the stacks; the engine control module controls the N stack with the sum of the maximum output power meeting the maximum power requirement to work according to the maximum power requirement of a fuel cell automobile, other stacks are closed, and the hydrogen flow, the air flow and the cooling liquid flow entering all the stacks and the input currents of the corresponding DC-DC modules are proportionally adjusted according to the attenuation degree of all the stacks, so that different power requirements of the fuel cell automobile can be met.

The invention discloses a detection method of fixing heating faults in a printing device and equipment and a circuit thereof. The detection method comprises the following steps: if it is judged that a fixing heating part of the printing device hasn't been heated to fixing temperature within first scheduled time and supply voltage is less than a first voltage threshold, temperature of the fixing heating part is detected and whether the fixing heating part is heated to the fixing temperature within second scheduled time is judged; if it is judged that the fixing heating part is heated to the fixing temperature within the second scheduled time, a first fault signal is outputted; and if it is judged that the fixing heating part is not heated to the fixing temperature within the second scheduled time, a second fault signal is outputted. By the above detection method, whether the specific overtime reason of heating to the fixing temperature is that supply voltage is too low or a sensor operates poorly or the fixing heating part goes wrong can be judged so as to provide users with correct fault prompt information and avoid unnecessary maintenance work. The invention also discloses a printing device.

The invention relates to a heat exchanger diagnosing method. The primary mass flow of the flowing medium flowing through a heat exchanger (8, 18) is regulated by a regulating valve (6, 16) controlledby a process controller (4, 14), wherein the valve position values provided by the process controller (4, 14) for the regulating valves (6, 16) are obtained and stored. The heat exchanger diagnosing method is characterized in that the valve position value for the regulating valve (6, 16) is recorded during the recording period, so that in at least one sequence of measurement results, the valve position value assigned to a periodic observation period is stored, wherein the observation period reflects that in the same time period of one year, the dirty degree of heat exchanger (8,18) is diagnosed by analyzing a position value of the at least one sequence of measurement results throughout the recording period when a deviation of the stored measurement value from a reference value assigned tothe sequence of measurement results is greater than a predetermined deviation from the reference value.

The invention discloses a water-sand separation building applicable to a linear chute spillway. The water-sand separation building mainly comprises a sand collection pool of which the upstream end is connected with an incoming flow spillway, and a flow pass channel and a sand discharge channel which are positioned at the downstream part of the sand collection pool and are arranged side by side, wherein an inlet of the sand discharge channel is in smooth connection with the sand collection pool; the flow pass channel is connected with the sand collection pool through an overflow weir; the water attaining surface of the overflow weir is an circular arc surface, and forms a sand guide wall used for introducing large-particle and granular sediment in a water current into the sand discharge channel; the upstream end of the circular arc surface of the sand guide wall is connected with the side wall on the outer side of the flow pass channel; the downstream end of the circular arc surface of the sand guide wall is connected with a separation side wall of the flow pass channel and the sand discharge channel; and the pool bottom of the sand collection pool in front of the sand guide wall has a gradient inclined to the inlet of the sand discharge channel. Through the adoption of the water-sand separation building, the large-particle and granular sediment in a high-sand content water current in a chute can be separated from the water current relatively well, the sediment which has relatively large harm to the chute spillway is discharged from the special sand discharge channel, and the purposes that the protection range is decreased and the safety of project operation is improved are achieved.

The invention discloses a high-voltage frequency converter with a safety protection structure and a working method thereof. The converter comprises a protection box, wherein a damping support is installed in the center of an inner wall of the bottom of the protection box, a high-voltage frequency converter body is installed at the center of the top of the damping support, a lower sliding groove isformed in one side of the bottom of the protection box, a reciprocating screw rod is rotatably connected with the interior of the lower sliding groove, a gear motor in driving connection with the reciprocating lead screw is installed on one side of the bottom of the protection box, a sliding block sliding in the lower sliding groove is connected with the reciprocating lead screw in an engaged mode, the sliding block is fixed to the corner of one side of the bottom of the box door, and an electronic lock is installed in the center of one side of the protection box. The high-voltage frequency converter is novel in structure and ingenious in conception, accidental electric shock of workers can be prevented, the workers can be prevented from conducting maintenance work in an electrified stateof the high-voltage frequency converter body, and use safety is greatly improved.

The invention discloses a mandril trolley cooling device for a seamless steel tube puncher. The mandril trolley cooling device comprises a mandril trolley inner cooling water pipe fixed on a mandril trolley, a mandril inner cooling water pipe arranged in a mandril, a cylinder, a connecting pipe, a cooling source water pipe and a cooling water hose, wherein the tail end of the mandril inner cooling water pipe is connected with the front end of the mandril trolley inner cooling water pipe, a piston rod of the cylinder is a hollow pipe and is provided with a first end and a second end, and the first end and the second end respectively stretch out a cylinder body; one end of the connecting pipe is connected with the tail end of the mandril trolley inner cooling water pipe, the other end of the connecting pipe is matched with the first end of the piston rod of the cylinder; and one end of the cooling water pipe is connected with the second end of the piston rod of the cylinder, and the other end of the cooling water hose is connected with one end of the cooling source water pipe. According to the invention, on/off of a cooling water pipeline is controlled by virtue of the cylinder, thus an external cooling water pipe drag chain and a long external cooling water pipe do not need to be arranged, manufacturing cost and maintenance cost are reduced, and production efficiency is improved.

The invention discloses a facility management system based on RFID installed in a reinforced concrete beam, and the system comprises an extraction module which is used for extracting BIM model information required for designing a steel bar from a BIM model, wherein the BIM model information comprises the load information, terminal supporting information, and geometric information of the reinforcedconcrete beam; a structure analysis module which is used for calculating bending moment and shearing force acting on the reinforced concrete beam according to the BIM model information; a calculationmodule which is used for converting the geometric information, the bending moment and the shearing force into steel bar design requirements required for designing the reinforced concrete beam according to design specification requirements; And an RFID electronic tag which is used for storing the design information of the reinforced concrete beam of the building information model and facilitatingthe production, construction, assembly and maintenance of building components. Therefore, the provided steel bar selection and arrangement not only meet the requirements of design specifications, butalso meet the requirements of rapidness, economy and full automation of the implementation process.

The invention discloses a single leg auxiliary movement medial trestle capable of controlling single movement distance. The single leg auxiliary movement medial trestle comprises a left trestle and aright trestle, wherein the left trestle is movably connected with the right trestle; one side of the right trestle is fixedly connected with a supporting rod, and a thigh trestle is fixed at one end,away from the supporting rod, of a transverse rod; a first connecting rod is fixed at one side, away from the supporting rod, of the left trestle, and a second connecting rod is fixed at one side, away from the supporting rod, of the right trestle; one end of a connecting rope is fixedly connected to a rope groove formed in a power wheel, and a resistance block is fixed at one end, away from the power wheel, of the connecting rope. The single leg auxiliary movement medial trestle capable of controlling the single movement distance has the advantages that the length of the single movement distance can be reasonably controlled, the movement distance is controlled through the length of the connecting rope, a motor no longer needs to be used to control the power wheel, the use of electric energy is cancelled, and the maintenance work of the motor used repeatedly is also avoided, so that the single leg auxiliary movement medial trestle has an auxiliary movement function, is simpler, more convenient and operated easily, and is very worth popularizing.

The invention provides a labor-saving hoist access door, and belongs to the technical field of hoist overhaul equipment. The labor-saving hoist access door comprises an access door mounting frame, door handles and a hoist access door body, wherein the hoist access door body is located right in the front of the access door mounting frame; a connecting ring is fixedly connected to the position, close to the top, on the front side wall of the hoist access door body; a fixing base is arranged above the access door mounting frame; and a swing arm rod is arranged in the fixing base, two ends of theswing arm rod penetrate through the top and the bottom of the fixing base separately, the two ends of the swing arm rod are fixedly connected with the fixing base through nuts, and the outer surface of the swing arm rod is rotationally sleeved with a transmission plate. The hoist access door can be conveniently opened, the hoist access door can be conveniently installed on any machine case needingto be overhauled, operation is extremely convenient in the opening and closing processes, and the operation can be conveniently completed only by one worker.

A dry type boiler slag removing device for a power station auxiliary machine comprises a slag crusher, an air feeder, a conveying pipeline, a dust remover and a storage bin; the conveying pipeline is a columnar hollow cavity; the side, in the length direction, of the conveying pipeline is provided with an opening; the slag crusher throws slag materials into one end of the conveying pipeline through the opening; the air feeder is arranged at the end of the opening of the conveying pipeline; the portion, on the side of the opening, of the conveying pipeline is provided with the slag crusher; the other end of the conveying pipeline is connected with the dust remover; and the dust remover is an impulse type cloth bag dust absorbing device and is used for exhausting dust carried in the airflow released from the air feeder. The dry type boiler slag removing device for the power station auxiliary machine is a slag removing device with the beneficial effects of removing dust and preventing abrasion.

The invention discloses an intelligent detection method and device for a KIT board. Omission and negligence which may occur in the manual assembly process are avoided; the size specification and the number of parts are wrong, extra workload of checking parts is brought to locomotive maintainers; and the like. A scanning distance measurement module is adopted to perform scanning distance measurement on the standard KIT board; the scanned distance point cloud data is mapped into a two-dimensional color image; an OpenCV image processing algorithm is adopted, part contour information is extracted,feature data such as the area, the gray scale and the height in a part contour area are calculated, then a to-be-detected KIT board is scanned, the two sets of feature data are compared, and rapid and intelligent detection of part vacancies, part size errors and the like of the KIT board is achieved. According to the invention, errors can be found in time, parts can be supplemented or wrong partscan be replaced, hidden dangers to locomotive driving safety caused by careless omission in manual inspection and maintenance by using wrong specification parts are avoided, a large amount of manpower is saved, and the accuracy and efficiency of KIT board detection can be improved.

The invention discloses an auxiliary device for making ant specimens. The device comprises a base and a storage box with an end cover; an insertion groove is formed in the upper end of the base, a soaking bottle with an open upper end is inserted into the insertion groove, the open end of the soaking bottle is in threaded connection with a bottle cap, a supporting plate and a foam cushion are sequentially arranged in the soaking bottle from bottom to top, the side wall of the supporting plate is in sliding contact with the inner wall of the soaking bottle, the diameter of the foam cushion is slightly smaller than that of the supporting plate, and lifting rods are vertically arranged on the left and right sides of the supporting plate; a first storage groove and a second storage groove areformed in the storage box, a plurality of ant foot positioning needles used for fixing ant feet are arranged in the first storage groove, and ant body positioning needles are arranged in the second storage groove. According to the invention, the working efficiency of manufacturing the ant specimen can be improved, and the quality of the ant specimen can be improved.