3041 results about "Straight tube" patented technology

The invention belongs to the technical field of petroleum pipeline inner wall defect detection, and particularly relates to a petroleum pipeline inner wall defect detection system which comprises a pipe section division module, a wall thickness analysis module, a straight pipe section detection module and a bent pipe section detection module. Ultrasonic incident detection and eddy current scanning are synchronously carried out in areas with different wall thicknesses, eddy current and ultrasonic dual-mode detection are fused to generate a three-dimensional map containing defect boundary and depth information, a deposition risk area is divided on the basis of stress distribution of flow field simulation of a bent pipe section, an adaptive defect detection mode is adopted in different areas, and the defect detection accuracy of the bent pipe section is improved. Therefore, targeted detection of the defects of the inner wall of the petroleum pipeline is realized, missed identification is avoided to a great extent, and the completeness and reliability of defect detection can be greatly improved.

The invention discloses a robot welding pipeline flange displacement special clamp, and relates to the technical field of ship manufacturing equipment, the clamp comprises a processing table, a welding mechanical arm, a placing mechanism, two groups of pipeline clamping mechanisms, two groups of flange fixing mechanisms, a traction mechanism, a rotating platform and three screw rod sliding tables; the placing mechanism is slidably mounted in the middle of the machining table through the rotating platform, and the two pipeline clamping mechanisms are symmetrically slidably mounted on the two sides of the placing mechanism and can synchronously move and clamp pipelines. The two flange fixing mechanisms are symmetrically arranged on the two sides of the containing mechanism and horizontally move through a lead screw sliding table. The traction mechanism is connected with the machining table through a lead screw sliding table and can lock / unlock the rotating platform and drive the containing mechanism to move. The welding mechanical arm is in linkage with the clamp and can conduct welding along the butt joint axis. Multi-degree-of-freedom posture adjustment of a pipeline and a flange can be achieved, a straight pipe and a 0-90-degree bent pipe are matched, it is guaranteed that welding is in a horizontal butt joint state all the time, and the welding quality and efficiency are improved.

The invention relates to a cooling tower device for recovering heat from waste steam, which adopts three layers of transversely arranged heat exchange tube groups, realizes cascade recovery of heat energy of waste steam through communication of an air inlet and an air outlet, and is additionally provided with fins on the surfaces of heat exchange tubes to enhance the gas-liquid mass transfer efficiency. The core innovation lies in that a built-in mechanical cleaning mechanism is arranged, a driving assembly is in linkage with multiple sets of bidirectional adapters through a rotating shaft, brush rods distributed in the circumferential direction are driven to conduct high-frequency physical scraping on heat exchange pipes and fins, scale deposition is effectively restrained, and compared with traditional chemical cleaning, the shutdown maintenance time is shortened; the steam latent heat recovery rate can be increased, meanwhile, secondary pollution is avoided through a full-mechanical cleaning scheme, modular layout is adopted in structural design, interlayer fluid distribution of the heat exchange pipe set is achieved through a U-shaped pipe and a straight pipe, it is ensured that the resistance coefficient of the system is lower than that of similar equipment, and the device has remarkable energy-saving benefits in industrial scenes such as chemical engineering and metallurgy.

The invention relates to the technical field of heat preservation and energy conservation, and particularly discloses a system for testing the heat conductivity coefficient of a pipeline heat preservation material under an engineering meteorological environment condition, which comprises a straight pipe test piece with calibration ends fixedly mounted at two ends, and a heat preservation covering material wrapped on the outer wall of the straight pipe test piece to form a pipe fitting to be tested; the ventilation hood is positioned in the sealed space; air pipes at the output end of the air conditioning system are all located in the sealed space, and air outlets of the air conditioning system directly face the ventilation hood. By simulating multi-parameter coupling working conditions such as in-pipe medium temperature gradient, external temperature and humidity / wind speed circulation and mechanical vibration, the heat conductivity coefficient of the material is dynamically corrected, whether the heat conductivity performance of each layer of material meets the standard specification or not is verified, and the rationality of the composite structure is quantitatively evaluated based on a thermal resistance network model. Data support is provided for optimizing the heat preservation layer combination mode and thickness design, and the problem of design deviation caused by the fact that a traditional method cannot reflect actual engineering working conditions is solved.

The present application discloses a welding gun for U-shaped dense tubes, which relates to the field of welding equipment, and includes a fuselage and a machine head. The machine head is arranged at one end of the fuselage, and a receiving cavity is formed in the machine head. The receiving cavity is arranged at an end away from the fuselage, and the U-shaped tube and two straight tubes connected to the U-shaped tube extend from the open end of the receiving cavity into the receiving cavity of the machine head, and the end wall of the machine head away from the fuselage abuts against the outer wall of the heat exchanger chassis, and a welding mechanism is arranged on one side of the machine head located in the receiving cavity, and the welding mechanism welds the plug-in joint of the U-shaped tube and the straight tube. The present application uses the fuselage to drive the machine head to move, and the machine head is arranged on a U-shaped tube and two straight tubes through the receiving cavity cover, so as to weld the plug-in joint of the U-shaped tube and a straight tube, thereby facilitating the welding of the dense tube bundle of the heat exchanger.

The invention discloses an air conditioner pipeline intelligent manufacturing and fault detection method based on digital twinning, relates to the technical field of data center infrastructure and fault detection, and aims to solve the problems of low construction efficiency, serious error accumulation, operation and maintenance logic faults and the like in a traditional process. The system is split into five functional modules through modular assembly design, a prefabricated straight pipe section and a combined section are combined with an equipment decoupling adjusting section to eliminate errors, and a standardized machining drawing is output; the quality is ensured through laser cutting, precise welding and galvanization processes, and high-precision field installation is achieved by combining paper number dual-mode guidance; a valve unique coding system is constructed based on BIM mapping, a two-dimensional code is generated to realize three-dimensional model calling and emergency guidance, a digital twin platform dynamically associates equipment control logic and a spatial position through a logic unit group, pushes hierarchical positioning guidance and links AR technology guidance operation when a fault occurs, and realizes full life cycle data tracing based on a block chain.

The invention discloses a tea garden ditching and fertilizing all-in-one machine which adopts an electric crawler chassis which is independently driven on two sides, a fertilizing mechanism is located at the top of a whole machine frame, a ditching and earthing mechanism is located at the rear end of the whole machine frame, and the ditching depth can be adjusted by adjusting the length of a hydraulic telescopic rod; the control console is located at the front end of the whole machine frame and used for a driver to control the movement of the whole machine and the movement of all the mechanisms during driving, and meanwhile the ditching and fertilizing all-in-one machine for the tea garden can be controlled by selecting a wireless control mode under the condition that the road condition is simple. The ditching and fertilizing operation of the tea garden is more flexible; a wired and wireless combined remote control operation mode of ditching, fertilizing and earthing in the tea garden is realized; organic combination of the adjustable soil covering plate and the soil-splitting type fertilizing straight pipe is realized, and the soil crushing and covering link is more efficient; the ditching and fertilizing operation of the tea garden can be carried by a driver, and the complicated tea garden environment can be easily and timely adjusted in the operation process.

The utility model discloses automatic bag making and bagging equipment which comprises a machine base and an electric control cabinet, the machine base is sequentially provided with a feeding device, a shaping vacuum cylinder and an automatic bagging device, the inner wall of the shaping vacuum cylinder is provided with a plurality of suction ports in the circumferential direction, and the suction ports are used for adsorbing the outer wall of a bag material so that the bag material can be kept in a cylindrical shape. The automatic bagging device comprises an inner mold for sleeving a bag material, a straight pipe conveying and grabbing device used for tightly sucking the bag material and sleeving the bag material on the inner mold is further arranged between the shaping vacuum cylinder and the bagging automation device. The bag sealing and cutting device is used for heat-sealing the end part of the bag material to form a bag body and cutting off the connection between the bag body and the bag material, and the bent pipe conveying, grabbing and releasing device is used for adsorbing the end part of the unprocessed bag material to keep the bag material in a cylindrical shape, so that the whole process does not need manual intervention, continuous and rapid bag making and bagging operation can be realized, and the production efficiency is greatly improved.

The utility model discloses a novel venturi mixer for mixing waste gas, which comprises a venturi tube, and the venturi tube comprises a contraction tube, a throat straight tube and an expansion tube which are connected in sequence; the four-way pipe comprises a main pipe and branch pipes which are symmetrically arranged on two sides of the main pipe and are communicated with the main pipe; the air suction port end of the main pipe air channel is connected with the air inlet end of the shrinkage pipe. An injection pipe is arranged in the throat straight pipe; the outer side of the expansion pipe is sleeved with a combustion-supporting pipe; the end, close to the throat straight pipe, of the combustion-supporting pipe is in welded sealing connection with the expansion pipe, the other end of the combustion-supporting pipe is an open end, a bundling opening is formed in the end of the open end, and first rotational flow blades are evenly arranged on the circumference of the inner wall of the bundling opening at intervals; the device is compact in structure, normal-pressure or low-pressure waste gas and combustion-supporting gas can be fully mixed, the mixing effect is good, supercharging equipment does not need to be additionally purchased, and the waste gas treatment cost of enterprises can be reduced.

The invention discloses metal elbow welding equipment, and relates to the technical field of elbow welding, the metal elbow welding equipment comprises a working table, supporting frames are symmetrically mounted at the bottom of the working table, a welding arm is arranged at the top of the working table, the metal elbow welding equipment further comprises a rubber pad, a supporting rod is fixedly mounted on the other side of the top of the working table, and the supporting rod is arranged on one side of the upper portion of the rubber pad; the positioning assembly is arranged on the top and one side of the rubber pad, the positioning assembly comprises a fixing plate and a fixing assembly, the fixing assembly is arranged on the upper portion of one side of the rubber pad, and the fixing plate is fixedly installed on the portion, located on one side of the rubber pad, of the top of the workbench; according to the elbow positioning device, the elbows can be accurately positioned, the centers of the elbows with different sizes and different bending angles can coincide with the rotating axis of a straight pipe, deviation generated when the elbows and the straight pipe are welded can be avoided, the welding quality is improved, operation of workers is facilitated, and convenience and practicability are improved.

The invention relates to the technical field of bent pipe machining equipment, and provides a bent pipe continuous turning machining device which is used for machining a straight pipe section into a bent pipe and comprises a pipe bending assembly and a first supporting and bending assembly, and the first supporting and bending assembly comprises a first main body and a second main body, the first supporting piece is arranged on the first main body in a sliding mode in the radial direction of the straight pipe section and is configured to be capable of being close to or away from the inner wall of the straight pipe section after sliding; one end of the extension rod is connected with the first main body, the other end of the extension rod extends out of the straight pipe section in the axial direction of the straight pipe section, and the extension rod is provided with a penetrating channel; the operating rod is rotationally arranged in the penetrating channel, one end of the operating rod extends out of the penetrating channel, and the other end of the operating rod is configured to drive the first supporting piece to move to be close to the inner wall of the straight pipe section after rotating. By means of the technical scheme, the technical problem that in the prior art, when pipe bending equipment conducts pipe bending machining, stripes, wrinkles and bending are prone to occurring on products is solved.

The invention relates to the technical field of pipeline installation, and particularly discloses a super high-rise high-pressure pipeline installation structure which comprises a high-pressure pipe set, the high-pressure pipe set is composed of a right-angle bent pipe and two straight pipes connected with the two ends of the right-angle bent pipe respectively, and annular flanges are arranged on the outer sides of the joints of the right-angle bent pipe and the straight pipes. Sealing connecting parts used for connecting the connecting position of the right-angle bent pipe and the straight pipe and conducting multi-stage sealing on the connecting position are arranged at the connecting position of the right-angle bent pipe and the straight pipe, and a triangular reinforcing part used for conducting triangular reinforcing, locking and fixing on the two sealing connecting parts is arranged between the two sealing connecting parts. Different from a traditional mode that only a single sealing ring is arranged in a sleeved mode, a tight multi-stage sealing system is constructed by arranging the sealing connecting part and the triangular reinforcing part in a matched mode, when a high-pressure pipe set is connected, the first sealing ring fills a gap in the connecting position of the straight pipe and the right-angle bent pipe, primary sealing is achieved, and leakage of a high-pressure medium is effectively blocked.

The invention discloses an intelligent inspection robot. The robot is composed of a belt conveyor, an inspection mechanism and a robot walking mechanism. The belt conveyor is provided with a bottom frame, a conveyor frame, transmission rollers, a conveying belt and side baffles. The inspection mechanism is connected with the robot walking mechanism through an inverted-L-shaped vertical rod, a visual camera, an infrared camera, an arc-shaped push plate and the like are arranged on the inspection mechanism, the temperature of materials, the ground and a transmission roller can be monitored, and the materials exceeding the range can be pushed back. The robot walking mechanism drives the inspection mechanism to move front and back through an electric slide way and an electric sliding block, and the belt conveyor is comprehensively monitored. In addition, the inspection mechanism is further provided with a small pulse air pump, dust at the bottom of the tempered glass cover is removed through straight pipe pulse blowing, clear shooting is guaranteed, the air pump is provided with a filtering device for purifying air, stable work of the air pump is guaranteed through a gyroscope sensor and a servo electric push rod, and the intelligent level of inspection is overall improved.

The utility model relates to a heat exchange type temperature swing adsorption tower which comprises a lower port, a lower seal head, a tower body, an upper seal head and an upper port, the tower body is a cylindrical barrel, the tower body is sequentially communicated with the upper port, the upper seal head, the lower seal head and the lower port from top to bottom, a vertical space in the tower body is an adsorption area, an arch-shaped heat exchange tube bundle is arranged in the adsorption area, and the arch-shaped heat exchange tube bundle is arranged in the adsorption area. The arch-shaped heat exchange tube bundles are composed of a plurality of groups of vertical and horizontal heat exchange tube bundle networks formed by straight tubes arranged in an arch shape, the arch-shaped heat exchange tube bundles are gathered at the upper part of the tower body and are connected to an inlet of the heat exchange main tube, and the arch-shaped heat exchange tube bundles are gathered at the lower part of the tower body and are connected to an outlet of the heat exchange main tube, and manholes are formed in the tower body in the opening direction of the horizontal sections of the arch-shaped heat exchange tube bundles. The adsorption tower has the beneficial effects that raw material gas and desorbed gas are distributed more uniformly under the disturbance action of the arched heat exchange tube bundle, the absorption and desorption regeneration effects of an adsorbent are better, the adsorbent is convenient to fill, the service life of the adsorption tower is prolonged, and the operation cost is reduced.

The utility model discloses a heat-resistant and wear-resistant bent and straight pipe angle sampling inspection measurement device, and relates to the technical field of bent and straight pipe sampling inspection measurement. Comprising a sampling inspection workbench and a bent straight pipe sample body, a bent straight pipe corresponding groove is formed in the front face of the sampling inspection workbench, and the bent straight pipe sample body is placed on the inner side of the bent straight pipe corresponding groove. According to the utility model, if the bent and straight pipe sample body cannot be placed in the bent and straight pipe corresponding groove, the bent and straight pipe sample body can be determined not to meet the sampling inspection qualified standard, and if the bent and straight pipe sample body can be placed in the bent and straight pipe corresponding groove, the bent and straight pipe sample body meets the preliminary sampling inspection standard; through the detection assembly, the bent and straight pipe sample body to be detected can be conveniently limited; meanwhile, whether the detection assembly is conveniently attached to the surface of the bent and straight pipe sample body or not and whether the detection assembly is loosened or not after making contact with the bent and straight pipe sample body or not are observed from top to bottom, so that whether the bent and straight pipe sample body meets the qualification requirement of sampling detection or not is conveniently determined.

The utility model discloses a tank cleaning instrument for a Suma tank, and belongs to the field of cleaning devices in containers. The tank cleaning instrument for the Suma tank comprises a rack, the transmission device is fixedly arranged on the rack; the transmission device comprises a driving motor, an annular guide rail, a transmission belt and a sliding seat; the transmission device is connected with a plurality of connecting support plates; the placing seat is fixedly arranged on the upper surface of the connecting supporting plate; the lifting device comprises a lifting component bracket, a lifting driving component and a connecting block; the gas circuit device comprises a three-way electromagnetic valve, a gas filling pipe, a gas extraction pipe and a gas inlet and outlet straight pipe; the three-way electromagnetic valve is mounted on the connecting block; the upper end part of the gas path connecting part is connected with the lower end of the gas inlet and outlet straight pipe, and the lower end part of the gas path connecting part is connected with a gas production port of the Suma tank. The tank cleaning instrument for the Suma tank is exquisite in structural design, the labor intensity of operators is relieved, and the cleaning stability of the Suma tank is high; the tank cleaning instrument for the Suma tank can be automatically and intelligently used, and precise control over the cleaning process is achieved.

The present invention provides a local dry underwater laser welding multi-shielding gas filler wire drainage device, comprising an adjustable straight pipe, a connecting module, a drainage cover, a nozzle, and a wire feeding pipe. The connecting module is provided with a welding shielding gas inlet hole; the connecting module, the adjustable straight pipe, and the nozzle are sequentially connected from top to bottom and jointly form a long straight through path; the welding shielding gas inlet hole is communicated with the long straight through path; the drainage cover is sleeved on the outer side of the adjustable straight pipe to form a drainage cavity having a downward opening; the drainage cover is provided with a drainage gas inlet hole, and the drainage gas inlet hole is communicated with the drainage cavity; a fixing channel is formed on one side of the drainage cover; the wire feeding pipe extends into the drainage cavity from the fixing channel; a third gap is formed between the inner wall of the fixing channel and the outer side of the wire feeding pipe; a welding wire shielding gas inlet hole is formed in the wall of the fixing channel; the welding wire shielding gas inlet hole is communicated with the drainage cavity by means of the third gap. The drainage device can satisfy the requirement of underwater filler wire laser welding, and relates to innovative use of welding wire shielding gas to ensure that welding wires are in a dry state, thereby effectively improving the quality of filler wire welding.

The invention solves the problem that deep soil is not easy to contact with remediation liquid during contaminated soil remediation irrigation, and relates to the technical field of soil remediation irrigation, in particular to an irrigation device for heavy metal contaminated soil remediation, which comprises a liquid guide assembly and a soil shoveling assembly mounted on a cart, a soil turning mechanism in transmission connection with the soil shoveling assembly is arranged on the front side of the cart, a spray head set located below the rear side of the soil shoveling assembly is installed on the cart, the output end of the liquid guiding assembly communicates with the spray head set and the soil turning mechanism, the soil turning mechanism comprises a hollow cylinder, and a plurality of water guiding grooves are formed in the bottom of the hollow cylinder. The two ends of the hollow cylinder are connected with a solid column and a guide-in pipe respectively, sealing sleeves are installed on the outer surface of the solid column and the outer surface of the guide-in pipe, butt joint rings are arranged on the outer surfaces of the two sealing sleeves in a sleeving mode, and a straight cylinder ring arranged on the outer side of the hollow cylinder in a sleeving mode is connected between the two butt joint rings. The surface of the polluted soil can be broken open, a repairing agent is sprayed to the deep layer of the polluted soil, and the repairing effect on the deep layer of the soil is ensured.

The invention relates to the technical field of metal surface heat treatment, and discloses a fixed inductor for high-speed rail axle surface induction quenching, which comprises a busbar, a fixed plate, a cooling water sprayer and an effective geometry heating ring, the busbar is used for fixing the effective geometry heating ring and forms an electrifying passage and a water passing passage with the effective geometry heating ring with the hollow structure; the effective geometric body heating ring comprises three sections of straight section induction pipe bodies with different lengths and two sections of arc induction annular bodies, the straight section induction pipe bodies are arranged according to the lengths D1, D2 and D3, the straight pipe section D1 and the straight pipe section D2 are in arc transition through an R1, the straight pipe section D2 and the straight pipe section D3 are in arc transition through an R2, and the three straight pipe sections are parallel to one another and progressive inwards layer by layer; and the radians of the two sections of arc induction annular bodies are 90 degrees. According to the invention, one-time and global synchronous induction heating can be carried out on multiple sections of shaft necks and transition R-angle areas with complex geometrical shapes and obvious stress concentration at the two ends of the axle.

The utility model belongs to the technical field of cake decorating machines, and particularly relates to a cake processing decorating machine with a lifting mechanism, which comprises a machine frame, a machine door is arranged on the front side of the machine frame, and a machine cover is arranged on the back side of the machine frame. According to the scheme, by arranging the brake motor, the worm and gear lifter, the guide column, the linear bearing and other structures, the rotating panel shaft can be driven to ascend and descend, the position of a cake can be adjusted for use, under the action of the gear motor, the speed reducer and other structures, the rotating panel shaft can be driven to rotate so as to drive the cake to rotate, follow-up pattern mounting operation is facilitated, and the production efficiency is improved. Through the arrangement of the gear motor, the stirring roller, the filling pump, the hopper and other structures, materials such as cream can be effectively conveyed, the position of the dynamic nodding nozzle can be adaptively adjusted in cooperation with the arrangement of the first air cylinder, the second air cylinder, the movable clamping plate, the straight pipe welding piece and other structures, and dynamic pattern mounting operation can be conveniently conducted on cakes so as to meet different pattern requirements.

The invention discloses slivering equipment based on cotton-type wool fibers, and relates to the technical field of slivering of cotton-type wool fibers, and the slivering equipment comprises a positive sliver guide device, a stretch-breaking device, a slivering device, a transmission device for driving each device, and an embedded electronic control system which are arranged in sequence. Stable and uniform conveying is ensured through closed-loop control of the active unwinding rotating disc and the tension sensor, static electricity is effectively restrained through the automatic spraying system, the full-anti-static rubber roller and the coiling disc, the spinnability is improved, soft and accurate fiber straightening and length control are achieved through double-set five-up-ten-down full-delta-shaped curve stretch-breaking combined with pneumatic pressurization, and the production efficiency is improved. Compacting slivering and antistatic large-diameter straight pipe coiling guarantee that fiber slivers are compact in structure and excellent in forming, an embedded electronic control system conducts digital precise regulation and control on key parameters such as tension, gauge, drafting and pressure, automatic stopping and automatic creeling are achieved when the slivers are broken, and finally the effects of high-quality wool top production, high production efficiency and high production flexibility are achieved.

The invention relates to the technical field of back pricking imaging devices, and particularly discloses a back pricking imaging device for EMMIAmp; the Obrich defect positioning and back pricking imaging device comprises a bottom plate, and a sliding table is arranged on the bottom plate; the displacement mechanism is used for controlling movement in the X-axis direction, the Y-axis direction and the Z-axis direction; a monobarrel lens and an imaging device; the fixing mechanism is arranged at the upper end of the straight tube microscope mechanism and comprises a fixing frame and a rotary fixing assembly, the rotary fixing assembly is connected with the fixing frame and comprises a rotary panel, a driven gear, an adjusting knob and a driving gear, the adjusting knob is connected with the driving gear, the rotary panel is connected with the driven gear, and the driven gear is connected with the driving gear. The driving gear is meshed with the driven gear, and when the adjusting knob rotates, the rotating panel rotates in the fixing frame. The defects that in the prior art, a back pricking imaging device is insufficient in imaging stability and is difficult to carry out omnibearing imaging on a tested piece are overcome.

The present invention provides a spiral sleeve heat exchanger, which relates to the technical field of heat exchangers and includes an outer tube, an inner tube, a positioning tube, an arc-shaped side plate, and a heat insulation assembly. The inner tube is located inside the outer tube, and the inner tube and the outer tube form a sleeve heat exchanger structure. One end of the positioning tube penetrates through the outer tube and is fixedly welded to the outer wall of the inner tube, and the positioning tube is fixedly welded to the outer tube. In the present invention, by adopting spiral inner and outer tubes, when the metal temperature difference between the inner and outer coils is large, the inner and outer coils will produce deformations of different sizes. Since there is a large gap between the inner and outer coils, their deformations will not be restricted by each other; and the spiral coil has greater elasticity than a straight tube, which can eliminate most of the temperature difference stress, avoid the use of expansion joints, and thus reduce costs and leakage risks.

The invention discloses a small micro-superheated steam through-flow type gas condensation boiler, belongs to the technical field of boilers, and solves the problems that the current small gas boiler is developed towards the high-efficiency, low-emission and compact direction, and particularly pays attention to waste heat recovery and steam quality control. Comprising an annular water chamber allowing water to enter, a combustion chamber arranged above the annular water chamber and an ultra-low nitrogen surface fiber combustor located above the combustion chamber and communicated with the combustion chamber, and an annular steam chamber is arranged above the combustion chamber. The ultra-low nitrogen surface fiber burner works to burn gas and raise the temperature, and the composite fin straight water pipe converts water in the water pipe into wet steam through efficient heat exchange of the spiral fins and enters the annular steam chamber. External water is injected into the annular water chamber through the finned tube group of the flue gas condenser and the connecting tube, and then enters the steam chamber through the straight tube. Wet steam in the steam chamber enters the superheater through an inlet pipe to form micro superheated steam. Combustion smoke is condensed and discharged after being filtered by a filter screen and subjected to heat exchange, and dryness of the combustion chamber is guaranteed.

The invention provides a device and method for measuring the flow velocity and flow of gas in a pipeline, and particularly relates to the technical field of measuring instruments, and the device comprises a flow field optimization assembly, a flow velocity sensing assembly and a signal processing assembly. The flow field optimization assembly comprises a plurality of air duct partition plates and straight pipe sections, and the gas conveying pipeline is divided into a plurality of independent divided air ducts; the flow velocity sensing assembly comprises a rectification assembly and a pressure sensing assembly, the rectification assembly comprises a pore plate and / or a grid, and the pressure sensing assembly comprises a plurality of uniformly distributed pressure sensing elements; the signal processing assembly comprises a differential pressure sensing transmitter, a static pressure sensing transmitter, a temperature sensing transmitter, an atmospheric pressure sensing transmitter and a data processing module. The pressure sensing element detects differential pressure signals, the differential pressure sensing transmitter converts the signals, the data processing module calculates the average flow velocity and flow of gas based on the signals and measurement data, and the measurement precision and accuracy are improved.

The invention discloses an irradiation-resistant split radar level meter, and belongs to the technical field of level measurement. The level meter comprises a transmitter and a measuring assembly, and the transmitter is located in a low-irradiation area and used for transmitting and receiving radar waves and outputting a level measuring result; the measuring assembly is located in a high-irradiation area and comprises a first waveguide straight pipe, a waveguide bent pipe and a second waveguide straight pipe which are sequentially connected, the other end of the first waveguide straight pipe is connected with a transmitter, the other end of the second waveguide straight pipe is connected with a horn, the second waveguide straight pipe is sleeved with an outer sleeve, the two ends of the outer sleeve are fixedly connected with the second waveguide straight pipe, and the waveguide bent pipe is connected with the horn. The flange fixes the outer sleeve and the second waveguide straight pipe on the penetration piece through bolts, and the horn is used for controlling the beam angle emitted by the radar waves and collecting the returned radar waves. The level meter can solve the problem that in the prior art, a radar level meter cannot resist irradiation or cannot accurately measure the level of an irregular surface.

The invention discloses a pneumatic conveying system straight pipe auxiliary air inlet adding analysis method and device, and belongs to the technical field of pneumatic conveying, and the method comprises the following steps: simulating particle flow in a pulverized coal conveying pipe through simulation software in combination with an Ergun resistance model, and obtaining basic data; determining a pulverized coal initial deposition point according to the data, adding a first auxiliary air inlet, then adjusting the air inlet speed at a fixed included angle, changing the air inlet angle at a fixed speed, and recording the backward moving range of the initial deposition point; then single-dimension experiments are carried out to research the influence of all parameters on pressure drop, response surface optimization analysis is applied to construct a power consumption coefficient formula and optimize experiment results, and finally an auxiliary air inlet adding scheme is obtained through rounding processing. By optimizing auxiliary air inlet parameters, pulverized coal deposition can be reduced, pressure drop and power consumption of a conveying pipe are reduced, the performance of a pneumatic conveying system is improved, and the method has important application value in the pneumatic conveying fields of thermal power plants, mining industry and the like.

The invention discloses a spiral resonance photoacoustic cell and an operation method, the spiral resonance photoacoustic cell comprises a gas chamber straight tube, a spiral tube, an optical fiber collimator and an optical fiber F-P sonic sensor, the two ends of the gas chamber straight tube are open, the two ends of the spiral tube are communicated with the gas chamber straight tube, an acoustic resonance point is formed at the center of the spiral tube, and the optical fiber F-P sonic sensor is arranged in the central area of the spiral tube; and the optical fiber collimator is arranged at one end of the air chamber straight pipe. The spiral pipe is wound outside the air chamber straight pipe, the spiral pipe is communicated with the air chamber straight pipe, the structural design of the spiral pipe enables the spiral pipe to form acoustic resonance at a specific frequency, and the optical fiber F-P sonic sensor obtains a photoacoustic signal; compared with a conventional resonance photoacoustic cell, the physical volume of the resonance photoacoustic cell is greatly compressed, and the system integration level is effectively improved. More importantly, under the condition that a compact appearance similar to that of a non-resonant photoacoustic cell is kept, the device amplifies the photoacoustic signal intensity by several times through an acoustic resonance effect, and the detection sensitivity and the signal-to-noise ratio of the system are remarkably improved.

The invention relates to an interfacial polycondensation tubular reactor for preparing polycarbonate, which is characterized in that a U-shaped structure is adopted, a spiral turbulent flow device is arranged in a straight pipe section, and a high-viscosity melt is disturbed, laminar flow is eliminated and mixing is enhanced in an active or passive mode; a multi-stage independent temperature control module is arranged outside, so that the temperature of each reaction section is accurately regulated and controlled. The inlet, the outlet and the temperature control interface of the reactor adopt high-temperature-resistant and corrosion-resistant sealing design, and U-shaped modular flange connection is convenient for disassembly, assembly, cleaning and continuous expansion. The design solves the problems of non-uniform heat transfer and material residue of a traditional horizontal disc reactor, poor flow distribution of a tubular reactor and the like, and has the following advantages: the melt flow uniformity is improved, and local overheating and excessive polycondensation are avoided; the reaction efficiency and molecular weight distribution are optimized through segmented temperature control; the structure is compact without dead angles, the side reaction and inner wall corrosion risks are reduced, and the device is suitable for efficient continuous synthesis of polycarbonate.

The utility model provides a fluid flow measuring system of an ultrasonic flow meter, which at least comprises an ultrasonic flow meter with four or more sound channels, an embedded rectifier embedded in a fluid inlet of the ultrasonic flow meter, front-end straight pipe sections which are arranged at the front ends of the ultrasonic flow meter and the embedded rectifier and are not less than 5D in length, and the inner diameters of the front-end straight pipe sections and the front-end straight pipe sections are the same and are D; the embedded rectifier sequentially comprises a spiral flow generator, a straight pipe mixing cavity and a flow straightener in the flow direction of fluid. The space intersection angle O of the upper and lower end faces of the blades of the spiral flow generator and the intersection angle P of the blades and the outer wall of the inner rectification cylinder and the inner wall of the outer rectification cylinder are changed; meanwhile, the side length U and the wall thickness K of a regular hexagon rectification hole of the flow straightener are changed, it is verified that the embedded rectifier measures fluid through combination of a large amount of analog simulation data and single actual measurement verification experiment data, and the four-channel ultrasonic flowmeter can meet the fluid measurement precision of 1% under different turbulent flow conditions.