2780 results about "Main duct" patented technology

The invention relates to an air conditioner system, an air conditioner control method and a vehicle, and belongs to the technical field of air conditioner control. Air enters the air conditioning system through the air inlet duct, the main air duct is communicated with the air inlet duct and communicated to an air outlet unit of the air conditioning system, the air blower is arranged in the air blower duct, and the heat dissipation duct is arranged at the rear end of the air blower duct. When the temperature of the air blower rises and reaches a preset condition, the controller controls the heat dissipation air channel to communicate with the outside of the air conditioning system. The air conditioning system can be used for a vehicle. By adding the heat dissipation air duct, the air blower temperature detection strategy is designed. The air conditioning system and the control method thereof have the effects of improving the working efficiency of the air conditioning system and reducing the energy consumption of the air conditioning system.

Systems and generating power in an organic Rankine cycle (ORC) operation to supply electrical power. In embodiments, an inlet temperature of a flow of gas from a source to an ORC unit may be determined. The source may connect to a main pipeline. The main pipeline may connect to a supply pipeline. The supply pipeline may connect to the ORC unit thereby to allow gas to flow from the source to the ORC unit. Heat from the flow of gas may cause the ORC unit to generate electrical power. The outlet temperature of the flow of the gas from the ORC unit to a return pipe may be determined. A bypass valve, positioned on a bypass pipeline connecting the supply pipeline to the return pipeline, may be adjusted to a position sufficient to maintain temperature of the flow of gas above a threshold based on the inlet and outlet temperature.

The utility model discloses a prefabricated pipeline butt welding robot mechanism which comprises two sets of guide rails arranged on the ground in parallel, a roller carrier, a headstock positioner, a tailstock positioner, a supporting frame, a pneumatic manipulator, a three-axis mechanical arm and a working platform, two sets of cross-shaped sliding frames are arranged on the working platform, a gas shielded welding gun is installed on one set of cross-shaped sliding frames, and a gas shielded welding gun is installed on the other set of cross-shaped sliding frames. An argon arc welding gun is installed on the other set of cross-shaped sliding frame, a visual identification mechanism is arranged on the working platform and located between the two sets of cross-shaped sliding frames, and the headstock positioner comprises a first left-right moving mechanism, a first lifting mechanism and a rotating mechanism. The slewing mechanism is used for clamping a flange connected with the front end of the main pipeline and can drive the flange and the main pipeline to rotate, and the tailstock positioner can adjust the position and the height of the rear end of the main pipeline. The problems that automatic welding is high in requirements for pipeline assembly gap and alignment tolerance control and high in labor intensity are solved.

The invention belongs to the technical field of natural gas pipelines, and particularly relates to a natural gas pipeline maintenance and protection device which comprises a main pipeline. The two protection boxes are connected to the outer side of the main pipeline in a sleeving manner; the protection mechanisms are arranged at two ends of the protection box; the protection mechanism comprises a sealing assembly and an insect prevention assembly. The leakage position of the main pipeline is detected through the detection device, then the sealing stickers are symmetrically pasted to the leakage position of the main pipeline, then the two protection boxes are clamped together through the first sealing ring, in the clamping process of the protection boxes, the connecting position of the main pipeline and the second sealing ring is stressed and extruded, and under the action of the second spring, the leakage position of the main pipeline is detected. The second sealing ring and the mounting seat are shrunk in the cavity, and the second sealing ring is tightly attached to the main pipeline, so that the sealing performance in the protection box is ensured, and water and impurities are prevented from entering; during installation, under the action of a third spring, the medicine storage box is tightly attached to the outer side of the main pipeline, insects and ants are prevented from entering the protection box and biting the sealing paste, and therefore the protection effect on the sealing paste is achieved.

The invention discloses a passive nuclear steam supply system which is characterized in that two ends of a hot-section main pipeline are respectively connected with a reactor pressure vessel and a steam generator, a main pump is vertically connected with the steam generator, two ends of a cold-section main pipeline are respectively connected with the pressure vessel and the main pump, the hot-section main pipeline is provided with a first liquid level pressure tap and a second liquid level pressure tap, and the cold-section main pipeline is provided with a second liquid level pressure tap. The first liquid level pressure tap is located at the bottom of the hot section main pipeline, the second liquid level pressure tap is close to the steam generator and located at the top of the hot section main pipeline, the reactor coolant system further comprises a pressure stabilizer and a surge pipe, one end of the surge pipe is connected to one of the hot section main pipelines, and the other end of the surge pipe is connected to the bottom of the pressure stabilizer. The passive nuclear steam supply system can allow the rated power of the reactor core to be remarkably improved.

The utility model provides a clean room engineering filtering system, which relates to the technical field of clean room filtering and comprises a main pipeline, an air inlet pipeline is mounted at one end of the main pipeline, an air outlet pipeline is mounted at the other end of the main pipeline, and a rotating plate is rotatably connected between the main pipeline and the air outlet pipeline and between the main pipeline and the air inlet pipeline. Four circular through grooves are uniformly formed in the rotating plate in the circumferential direction, filter screens are mounted in the circular through grooves, a supporting structure is rotatably connected to the center of the rotating plate through a through hole, and a locking circular plate is mounted at the front end of the supporting structure in an inserted manner. When the filter screens need to be replaced, only the rotating plate needs to be rotated by 90 degrees, the positions of the two idle filter screens in the rotating plate and the positions of the two used filter screens are exchanged, at the moment, the two used filter screens can be rotated to the outside of the pipeline, a worker can disassemble the two used filter screens more conveniently, and the replacement is convenient. And the ventilation effect in the pipeline is not influenced, so that the working efficiency of personnel in the clean room is ensured.

The invention relates to the technical field of aero-engines, and discloses a second outer culvert adjusting mechanism suitable for variable cycle engine mixed exhaust, which comprises a main duct convergence adjusting sheet, a second outer culvert adjusting sheet, a main duct expansion adjusting sheet and a second outer culvert adjusting assembly, a second outer duct is formed between the second outer duct adjusting piece and the main duct convergence adjusting piece, and the second outer duct adjusting assembly is used for adjusting the angle of the second outer duct adjusting piece and the angle of the main duct convergence adjusting piece so as to control opening and closing of an outlet of the second outer duct. The second outer culvert adjusting mechanism is simple in structure, adjustment of the throat opening area of the second outer culvert is achieved through different elongation amounts of the actuator cylinders, and the second outer culvert adjusting mechanism has high adjusting capacity and can be flexibly adjusted according to the running state and exhaust requirements of the engine so as to achieve the optimal exhaust effect and engine performance.

The invention discloses a refrigeration pipe welding positioning method and device. The method comprises the following steps that S1, branch pipes are placed in all storage boxes; s2, the main pipeline is placed in a matching groove of the supporting frame, and the main pipeline is fixed through cooperation with a pressing ring; s3, a third electric cylinder is started, the third electric cylinder drives a supporting frame and the main pipeline to move to be close to the welding gun, and a branch pipe of the main pipeline moves to cross the welding gun; s4, a first electric cylinder is started, and the first electric cylinder drives a synchronous plate and an ejector sleeve to move; the motor, the first chain wheel, the second chain wheel, the chain and the hollow rotating disc are matched to drive the vortex line groove and linear groove linkage adjusting block and the rolling wheel to move, the purposes of clamping positioning and circle center correction of the branch pipe are achieved, the branch pipe is corrected to the position concentric with the disc, the coaxiality of the branch pipe and a main pipeline branch pipe is guaranteed, and the machining efficiency is improved. And the quality problems of insufficient welding, welding skips, poor welding seam forming and the like caused by positioning deviation are avoided.

The invention discloses a power plant automatic gas pipeline and a pressure control method thereof, the power plant automatic gas pipeline comprises a main pipeline, one end of the main pipeline is provided with a conveying pipeline and a pressure relief pipe, and the inside of the main pipeline can be conveyed to the inside of the conveying pipeline or the pressure relief pipe; a pressure relief valve shell is arranged at the top of the main pipeline, a pressure relief pipe is arranged on the pressure relief valve shell, and the pressure relief valve shell and the pressure relief pipe are at least used for dividing pressure of high-pressure steam in the main pipeline and conveying the high-pressure steam into the conveying pipeline or the pressure relief pipe; a stop valve is arranged on the main pipeline and is at least used for changing the flow of steam in the main pipeline; a valve element is arranged in the pressure relief valve shell in a sliding mode and at least used for controlling opening and closing of the pressure relief pipe. According to the pressure relief valve shell, when the steam pressure in the main pipeline rises, steam can enter the pressure relief pipe through the valve element and is discharged from the connecting pipe and the branch pipe, and the good protection effect on the main pipeline is achieved.

The invention belongs to the technical field of heating furnaces, and particularly relates to an oxygen-enriched combustion system and method for a coal gas single heat storage type heating furnace. Comprising an oxygen pressure regulating branch, a first heating section oxygen lance oxygen injection branch and a main pipe oxygen enrichment branch, the oxygen pressure regulating branch is provided with a pressure transmitter and a temperature transmitter, an oxygen source is communicated with the pressure transmitter and the temperature transmitter through a pipeline, and oxygen flows into the first heating section oxygen lance oxygen injection branch and the main pipe oxygen enrichment branch after being subjected to pressure regulation through a pressure valve. A flow control valve is arranged on the first heating section oxygen lance oxygen injection branch, oxygen is fed into the heating furnace, and the main pipe oxygen enrichment branch feeds enriched oxygen into the main pipe through an enriched oxygen distributor. Flexible switching of different oxygen enrichment modes of the heating furnace is achieved, the burner in the oxygen lance oxygen injection branch of the first heating section is not reversed, total-oxygen combustion of the burner is achieved, under the oxygen enrichment branch of the main pipe, oxygen is conveyed to the main pipe through the oxygen enrichment distributor through the other branch to be mixed with combustion air, and total-furnace oxygen enrichment combustion is achieved.

The invention relates to the technical field of aviation electromechanics, in particular to an electric ducted fan of an integrated heat dissipation structure and an aircraft. An electric ducted fan of an integrated heat dissipation structure comprises a main duct unit, a static blade unit, a movable blade unit, a motor, a heat dissipation duct unit and a heat dissipation unit. The main duct unit comprises a main duct wall; a main duct channel is arranged in the main duct wall; the stationary blade unit comprises stationary blades; the movable blade unit comprises movable blades; each heat dissipation duct unit comprises a heat dissipation duct wall; the heat dissipation duct wall is annular; a heat dissipation duct channel is formed in the heat dissipation duct wall; the radiating unit comprises a radiator; a cooling liquid flow channel and an air flow channel are arranged in the radiator; the cooling liquid flow channel is used for conducting heat of the battery; the air flow channel penetrates through the radiator in the axial direction of the heat dissipation duct channel. Therefore, the problem that the heat dissipation efficiency and the flight performance of the battery in the aircraft are difficult to consider at the same time is solved.

According to the oil mist removing device and method for the continuous annealing line temper mill, the temper mill comprises a supporting roller, supporting bearing seats are arranged on the two sides of the supporting roller, bearing sealing devices are arranged on the two sides of bearings on the bearing seats, and the oil mist removing device for the temper mill comprises a wool felt ring, an oil retainer ring and an oil mist removing system. Wherein the wool felt ring is sleeved on the outer side of the bearing sealing device at the joint of the supporting bearing seat and the supporting roller; the oil retainer is arranged on the outer side of the bearing, the top of the wool felt ring covers the joint of the bearing and the supporting roller, a gap is reserved between the oil retainer and the roller surface of the supporting roller, and an oil pumping air hole is formed in the oil retainer; the oil mist removal system comprises an oil gas pumping hose, a first pipeline, a main pipeline, a filter, a fan, a motor and an exhaust port, the oil gas pumping holes are connected with the first pipeline through the oil gas pumping hose, the first pipeline is connected with the main pipeline after being converged, the filter, the fan and the exhaust port are sequentially arranged on the main pipeline from upstream to downstream, and the motor is connected with the fan. According to the method, the overall occurrence probability of plate surface oil spots can be reduced, and the plate surface quality is obviously improved.

The invention belongs to the technical field of flame-retardant coating preparation, and discloses a flame-retardant coating preparation device and a preparation method thereof.The flame-retardant coating preparation device comprises a reaction cylinder, a water inlet, a first discharging pipe and a mixing mechanism arranged in the reaction cylinder and further comprises a discharging assembly installed at the top of a cavity of the reaction cylinder; the discharging assembly comprises a discharging opening fixedly formed in the top of the reaction cylinder and a funnel, and the funnel is rotationally provided with a conveying roller. According to the scheme, a mixture of water and a solvent is injected into the reaction cylinder through the water inlet, meanwhile, the turbine and the mixing blades rotate through rotation of the motor, and the turbine rotates to convey a mixed solution in the reaction cylinder to the top of the mixing cavity through the main pipeline; and meanwhile, the powder raw materials and the mixed solution in the mixing cavity can be stirred and mixed at a high speed through rotation of the mixing blades, the mixed coating can be discharged through a second discharging pipe, operation is completed, and the situation that the powder coating is accumulated and agglomerated is avoided.

The invention discloses a filtering system and a working method thereof, and relates to the technical field of fluid filtration, the filtering system comprises a main filter and a standby filter, the main filter and the standby filter are both internally provided with precise filter element mechanisms, and both the main filter and the standby filter are provided with liquid inlets; a liquid inlet of the main filter is communicated with an external liquid feeding main pipeline, and the main filter is provided with a hydraulic detector; the filter further comprises a lifting driving mechanism and a valve switching mechanism, the lifting driving mechanism is arranged on the main filter, and the valve switching mechanism is arranged between the liquid inlets of the main filter and the standby filter. When the precise filter element mechanism is used for filtering, if the internal pressure of the filter cartridge of the main filter exceeds a set value, the standby filter is switched to replace the filtering operation, so that an operator can conveniently replace the precise filter element mechanism in the main filter under the condition that the filtering operation does not need to be stopped.

The invention relates to the technical field of PCB production, and discloses an automatic packaging device for PCB production, which comprises a base, a conveying structure is arranged on the inner wall of the base, a supporting rod is rotatably sleeved on the inner wall of the base, a connecting rod is fixedly assembled on the outer edge, close to the top, of the supporting rod, a square rod is fixedly assembled on the side surface of the connecting rod, and the square rod is fixedly assembled on the inner wall of the base. And an electric telescopic rod I is fixedly assembled at the bottom of the square rod. A motor is used for driving a baffle to rotate, an exhaust pump is used for assisting gas in a main pipeline and a fixed pipe to be supplied into an inner cavity of a second telescopic hose, a spraying pipe is used for spraying an electrostatic eliminating agent to a PCB, then the motor is used for driving the baffle to rotate, an air inlet pump is used for assisting dust collection of the surface of the PCB, and a filtering frame is used for intercepting impurities and dust; and an air inlet pump is used for sucking air to supply air in a fixed pipe to push a sliding plate to move, so that the sliding plate is used for driving a clamping plate to move, and the clamping plate is used for clamping the PCB.

The invention relates to the technical field of welding cooling, and provides a liquid nitrogen spraying welded plate cooling device and a design method thereof.The cooling device comprises a liquid nitrogen source used for providing liquid nitrogen; the input end of the spraying module is connected with a liquid nitrogen source through a main pipeline, the output end of the spraying module is provided with a plurality of spraying holes corresponding to the surface of the welded plate, and the main pipeline is provided with a flow regulating valve; the temperature acquisition module comprises a plurality of temperature sensors which are arranged at temperature measuring points of a welding plate; the control module is electrically connected with the temperature acquisition module and the flow regulating valve respectively; the structure of the spraying device is optimized through flow field simulation, it is ensured that liquid nitrogen is evenly distributed to the surface of a welded plate, local supercooling or superheating is avoided, and uniform cooling of the welded plate is achieved; data are collected through the temperature sensor, closed-loop control is formed in cooperation with the PID controller and the multiple adjusting valves, the liquid nitrogen flow, the spraying area and the spraying time can be accurately regulated and controlled, the inter-channel temperature is effectively controlled, the temperature is prevented from being too high, and it is guaranteed that the welding process is continuously and stably carried out.

The present invention is applicable to the technical field of three-way valve manufacturing, and provides a positioning device and positioning method for three-way valve welding, including a workbench, on which a material drop hole is arranged, and further including: mounting block 1 and mounting block 2, and supply hopper 1 and supply hopper 2 fixedly connected to the upper end of the workbench, the supply hopper 1 and supply hopper 2 are respectively located on both sides of the material drop hole, and the supply hopper 1 and supply hopper 2 are respectively used for the supply side pipeline and the main pipeline; the mounting block 1 is rotatably connected with a rotating hook block, the rotating hook block is provided with a placement groove, and the mounting block 1 and the rotating hook block are both located below the supply hopper 2; the mounting block 2 is movably connected with a positioning shaft, and the mounting block 2 is fixedly connected with a push block at one end close to the rotating hook block. The present invention can realize the stopping feeding, positioning fixing and unloading of the three-way valve welding parts, with a high degree of automation and high positioning accuracy of the three-way valve, thereby improving the welding efficiency of the three-way valve.

The invention relates to the technical field of wellhead protection, and particularly discloses an oil production wellhead pressure self-adaption protection device which comprises a protection shell, an indicator lamp is installed on the protection shell, the protection shell comprises a shell body, and a main pipeline is arranged on the inner side of the shell body. A partition cavity, a pressurizing groove and a pressure sensing groove are sequentially formed in the outer side of the main pipeline from top to bottom, the partition cavity is a multi-angle deep groove, a partition assembly is installed in the partition cavity, one end of the partition assembly is installed on a hydraulic input pipe, and the hydraulic input pipes are communicated through hydraulic oil communication holes; by arranging the partition assembly, when blowout occurs, a pressure sensor collects pressure information, an electric signal controls a hydraulic assembly to extend, the sharp ends of triangular fault blocks pierce the interior of a pipeline, multi-direction pressure synchronous operation is formed among the four triangular fault blocks, the pipeline is rapidly cut off, and the pipeline cannot transport oil again; and rapid and complete plugging in the pipeline is realized.

The invention relates to a sulfur hexafluoride monitoring system and a carbon neutralization data processing method based on artificial intelligence, and belongs to the technical field of power grid artificial intelligence. The system comprises a sulfur hexafluoride gas cylinder, a controller, a sulfur hexafluoride density monitor, an auxiliary sulfur hexafluoride gas cylinder, a gas pump and a recovery gas cylinder, the sulfur hexafluoride gas cylinder is connected with the controller through a main pipeline; a main valve is arranged between the sulfur hexafluoride gas cylinder and the main pipeline; a control valve is arranged between the controller and the main pipeline; the controller is connected with the auxiliary sulfur hexafluoride gas cylinder through an auxiliary pipeline; an auxiliary valve is arranged between the auxiliary sulfur hexafluoride gas cylinder and the auxiliary pipeline; and the sulfur hexafluoride density monitor is communicated with the main pipeline through a debugging pipeline. The problem that sulfur hexafluoride gas emission is lack of supervision in the maintenance, construction or debugging process of the sulfur hexafluoride equipment of the GIS equipment transformer substation is solved, and greenhouse gas emission reduction and carbon neutralization monitoring level improvement of power grid enterprises are promoted.

The invention discloses a well drilling fracturing device for oil field yield increase, and relates to the technical field of oil field collection, the well drilling fracturing device comprises a fracturing filtering mechanism and a bottom rotating bearing installed in the fracturing filtering mechanism, the bottom of the fracturing filtering mechanism is provided with a connection sealing mechanism, and the bottom of the connection sealing mechanism is provided with a main pipeline; the fracturing filtering mechanism comprises a filtering support, a plurality of sewage draining holes are formed in the outer side of the filtering support, a worm gear limiting cover is fixedly installed at the bottom of the filtering support, rotating supports are symmetrically installed on the side, close to the interior of the worm gear limiting cover, of the filtering support, and rotating motors are fixedly installed on the outer sides of the rotating supports; by utilizing the structural characteristics of the vortex cleaning impeller, when the vortex cleaning impeller rotates anticlockwise, the temporary plugging agent can move towards the inner side of the filter screen cylinder under the action of the groove in the vortex cleaning impeller, so that the conveying efficiency of the temporary plugging agent is improved, and meanwhile, the vortex cleaning impeller can clean the outer surface of the filter screen cylinder.

The invention relates to the field of irrigation systems, in particular to an electric actuator and a method for applying the electric actuator to a multi-source sensor intelligent irrigation system.The irrigation system comprises a pipeline, a pressure sensor and an ultrasonic flowmeter, the pipeline comprises a main pipeline and branch pipelines, the multiple branch pipelines are located at different heights, one end of each branch pipeline communicates with the main pipeline, and the other end of each branch pipeline communicates with the ultrasonic flowmeter; a plurality of irrigation openings are evenly distributed in the branch pipelines, the ultrasonic flow meters are installed at the irrigation openings to collect the flow speed of water flow at the irrigation openings, at least one pressure sensor is installed on the main pipeline and each branch pipeline, the pressure sensors are used for monitoring water pressure in the branch pipelines, the electric actuators are installed on the main pipeline and the branch pipelines, and the valves are fixed to the pipelines. The opening degree of the valves is in direct proportion to water pressure and water flow, and the electric actuators on the branch pipelines are installed at the ends, communicated with the main pipeline, of the branch pipelines. The water pressure in the pipeline is controlled by controlling the electric actuator, and the pipeline dredging effect is achieved.

A blade and a sealing element forming an assembly for a turbomachine turbine. The blade includes an airfoil and a platform to which the sealing element is connected. An internal channel passes through the platform so as to draw off fluid circulating in a primary duct that it delimits and to inject the thus drawn-off fluid into an inter-lip cavity delimited by the sealing element.

The invention discloses mold production and manufacturing equipment, and relates to the technical field of mold machining, the mold production and manufacturing equipment is technically characterized by comprising a barrel frame and a supporting rod fixedly mounted on the barrel frame, and the barrel frame is sequentially divided into a trepanning area, a discharging area and a feeding area in the circumferential direction; the device further comprises a rotating assembly, a bearing plate, a first clamping plate, a third clamping plate and a second clamping plate. The multiple bearing plates are distributed in the circumferential direction of the barrel frame at equal intervals. The lifting track is fixedly installed on the inner surface of the cylinder frame, and the track block is in sliding connection with the lifting track; the air exhaust assembly is fixedly mounted in the cylinder frame; the exhaust pipe group comprises a main pipeline, a first branch pipe, a second branch pipe and a telescopic pipe; the conveying belt is arranged at the discharging area; the material storage frame is fixedly arranged at the feeding area, an outlet is formed in the bottom end of the material storage frame, and a material pushing assembly is fixedly installed on the material storage frame; and holes can be continuously formed in the mold, and the machining efficiency of the mold is high.

The invention provides a mobile aeration device, system and control method, the mobile aeration device comprises a pipe frame and aeration nozzles arranged on the pipe frame, the pipe frame comprises a main pipeline, a plurality of layered first branch pipelines arranged on one side of the main pipeline, and second branch pipelines arranged on the first branch pipelines, the upper part of the main pipeline is closed, and a hanging ring is arranged at the closed position; the air inlet pipe is arranged on one side of the main pipeline, the first branch pipelines are detachably mounted, the hanging rings are arranged on the pipe frame, so that external equipment is connected with the hanging rings, the pipe frame can be conveniently and quickly lifted and moved, and the multiple layers of first branch pipelines and second branch pipelines are arranged on the pipe frame, so that the aeration efficiency of the aeration device can be improved, and complement each other; and the purpose of rapid aeration is achieved.

The utility model relates to the field of water supply equipment, in particular to a domestic water pressure automatic compensation device which comprises a main water supply unit, a compensation water supply unit and an electric control unit, the main water supply unit is provided with a main pipeline, a one-way valve, a first water pressure sensor and a second water pressure sensor, and water can flow from the input end of the main pipeline to the output end of the main pipeline; the compensation water supply unit is provided with a side pipeline, an electric valve and a booster pump. The water inlet end and the water outlet end of the side pipeline are arranged on one side of the water inlet end and the water outlet end of the one-way valve respectively and communicated with the main pipeline. According to the utility model, the electric control unit is used for receiving the dynamic change information of the water pressure of the main pipeline collected by the first water pressure sensor and the second water pressure sensor and comparing the dynamic change information with the lowest water pressure value acceptable by a user to judge whether the booster pump needs to be started, so that the booster pump starts to work only when pressure compensation is needed; therefore, pressure dynamic compensation is performed through a bypass to ensure stable water pressure of a user, electric energy can be saved, and the service life of equipment is prolonged.

The utility model belongs to the technical field of sewage treatment, and particularly relates to cloth filter sewage treatment equipment with an automatic cleaning function, which comprises a filter tank. A main pipeline is rotationally connected into the filter tank; the outer side wall of the main pipeline is fixedly connected with a first fixing frame; a plurality of groups of first fixing frames are arranged on the outer side wall of the main pipeline; the inner side walls, away from the main pipeline, of the first fixing frames are rotationally connected with rotating rings. The middle part of the rotating ring is fixedly connected with a backflushing pipe; a nozzle is arranged on the outer side wall of the back-flushing pipe; a plurality of groups of nozzles are symmetrically arranged on the outer side wall of the back-flushing pipe; in the step, the filter cloth is backwashed by arranging a backwash pipe, a nozzle, a water inlet pipe and a first spring, sludge or foreign matters adhered to the surface of the filter cloth are washed away, the cleanliness of the surface of the filter cloth is improved, the backwash water pressure and the backwash effect are improved, and the situation that the filter effect is affected due to the fact that the sludge is still adhered to the surface of the filter cloth after backwash is reduced.

The utility model discloses a fluid distributor assembly in the technical field of fluid distributors, which comprises a flow distribution box and a flow distribution block, the flow distribution block is positioned on the lower side of the flow distribution box, a main pipeline is inserted in the middle of the top of the flow distribution box, the bottom end of the main pipeline extends to an inner cavity of the flow distribution box, and the flow distribution block is positioned in the inner cavity of the flow distribution box. Flow dividing pipes are inserted into the front side, the rear side, the left side and the right side of the bottom of an inner cavity of the flow dividing box, a limiting groove is formed in the periphery of the upper side of the inner cavity wall of the flow dividing box, a floating ring is slidably connected to the inner cavity wall of the limiting groove, the inner ring wall of the floating ring is slidably connected with the outer side wall of the main pipeline, and sliding rods are slidably connected to the left side and the right side of the interior of the floating ring; the fluid distributor assembly is reasonable in structural design, fluid can be prevented from scattering all around when entering the flow dividing cavity and entering different pipelines to cause flow difference, distribution is more uniform, adjustment consistency can be guaranteed when the flow speed is adjusted, and uneven distribution caused by flow speed difference is avoided.

The invention discloses a system and a method for testing thermal cycle characteristics of multidirectional horizontal pipelines of a nuclear power plant, the system comprises a circulating water path and a pressure stabilizing water path, the circulating water path comprises the multidirectional horizontal pipelines (1a, 1b), paired pressure signal detectors (17a, 17b), pipeline heaters (14a, 14b, 14c) and a pipeline heat exchanger (3), and the pressure stabilizing water path comprises a cooling water supply system (18) and a pressure stabilizer (23); the circulating water path is communicated with the pressure stabilizing water path, and the number of the multi-direction horizontal pipelines (1a and 1b) is more than two. The thermal cycle characteristics of the upstream horizontal pipeline, the lateral horizontal pipeline and the downstream horizontal pipeline connected with the main pipeline under the conditions of different temperatures, pressures and volume flows can be researched more effectively, conveniently and accurately, and data support and reference are provided for design optimization of the multi-direction horizontal pipeline of the nuclear power station.

The invention discloses high-integration generator stator cooling water dissolved hydrogen content on-line monitoring equipment which comprises a cabinet, a first partition plate and a second partition plate are arranged in the cabinet, the first partition plate vertically divides the cabinet into a lower space and an upper space, and the second partition plate horizontally divides the upper space into a first installation space and a second installation space; the sample constant temperature unit is mounted in the lower space, and the sample constant temperature unit is connected with the generator water inlet main pipeline and the generator water return main pipeline; the sampling unit is mounted in the first mounting space, is connected with the sample constant-temperature unit and is connected with a water inlet and outlet pipeline, and the water inlet and outlet pipeline is positioned in the first mounting space; the detection and analysis unit is located in the second installation space, the sampling unit is connected with the detection and analysis unit, and the detection and analysis unit is connected with a drainage device connected with a generator stator cooling water tank. According to the scheme, the pipeline trend is simple, on-site construction and installation are facilitated, the on-site construction difficulty is greatly reduced, and the construction period is greatly shortened.