41results about How to "Consistent force" patented technology

The invention discloses a damping mechanism and a warp knitting machine and process based on the damping mechanism, and relates to the field of damping mechanisms, the damping mechanism comprises a damping hydraulic cylinder and a damping hydraulic rod, the damping hydraulic rod is inserted in the damping hydraulic cylinder, a damping cylinder is fixedly installed on the damping hydraulic cylinder, and a flow limiting hole is formed between the damping cylinder and the damping hydraulic cylinder; an adjusting plate is connected to the damping hydraulic cylinder through a screw cylinder, a damping plate is fixedly installed on the top of the damping hydraulic rod, a damping spring is arranged between the damping plate and the adjusting plate, and the damping hydraulic cylinder and the damping hydraulic rod are sleeved with the damping spring. The base is rapidly leveled, the damping mechanisms and the warp knitting machine body are prevented from inclining, the stress of the damping mechanisms is consistent, the damping effect on the warp knitting machine body is better, the inclination degree of the base is more conveniently known, and the situation that the base is inclined due to misoperation of the leveling unit is prevented; the length of the supporting unit is prevented from being changed under the condition that the leveling unit vibrates, the flatness of the base is guaranteed, and the running stability of the warp knitting machine body is improved.

The invention relates to a lifting ring tilting device and a top drive drilling system, the lifting ring tilting device comprises a rotating head, a fixing assembly, an oil cylinder assembly and two lifting rings, the two lifting rings are oppositely installed on the two sides of the rotating head, and the upper ends of the two lifting rings are rotationally connected with the rotating head; the fixing assembly is fixedly installed on the rotating head, and the oil cylinder assembly is fixedly installed on the fixing assembly, rotationally connected with the two lifting rings through the inclining assembly and used for driving the two lifting rings to incline. The tilting device has the beneficial effects that the structure is compact, the design is reasonable, the lifting capacity of the tilting device can be improved, and the problem that the boundary dimension of an existing tilting device is increased along with the increase of the bearing capacity is effectively solved.

The invention relates to a die-casting die applying a composite core-pulling structure, which comprises an upper die frame and a lower die frame, an upper die core and a lower die core which are stacked up and down are arranged between the upper die frame and the lower die frame, and a die cavity is arranged between the upper die core and the lower die core. A front core-pulling block, a rear core-pulling block and a right core-pulling hole position column are arranged on the front portion, the rear portion and the right side of the upper end of the lower mold core respectively, each core-pulling block and the right core-pulling hole position column are each provided with a driving device, and a composite core-pulling structure is arranged on the right side of the upper mold frame. A brand new composite core-pulling structure is designed, the height of the mold is effectively reduced, the layout of the movable mold and the fixed mold is more reasonable, meanwhile, shaking deformation of a product caused by sliding block pulling is reduced, a mold pressing plate is normally used, and a special installation mode is not needed.

The invention relates to a turnover hoisting mechanism and a turnover hoisting method, and relates to the field of building construction, the turnover hoisting mechanism comprises a hoisting frame, a hoisting assembly and a turnover assembly, the hoisting assembly is fixedly or detachably connected with the hoisting frame, and the turnover assembly is fixedly connected with the hoisting frame. The overturning and hoisting method adopts the overturning and hoisting mechanism to overturn and hoist the prefabricated part. The overturning and hoisting mechanism has the beneficial effects that when the overturning and hoisting mechanism is used for overturning or hoisting, only a hoisting belt or a rope connected with a hoisted object needs to be replaced, the working efficiency of hoisting transportation and overturning operation of the integrated module house and the large building component is improved, the investment of production equipment is saved, the equipment is light, convenient to move and low in cost, and the production cost is reduced. And a fixed field is not occupied.

The invention provides a capacitance film thickness measuring device, and relates to the technical field of thickness meters, the capacitance film thickness measuring device comprises a test bench, the top surface of the test bench is provided with a test groove, the side wall of the test groove is provided with a displacement roller, the displacement roller can roll on the side wall of the test groove along the length direction of the test groove, and the displacement roller and the bottom surface of the test groove are arranged in parallel. According to the capacitance film thickness measuring device provided by the invention, through the arrangement of the test bench, the displacement roller, the telescopic rod, the pressing block, the capacitance type displacement sensor, the displacement amplification mechanism and the constant force driving mechanism, when the thickness of a capacitance film is measured, it can be ensured that the acting force of the pressing block on the capacitance film is always kept consistent; according to the invention, measurement errors caused by different deformation amounts of the capacitance film due to different acting forces on the capacitance film are reduced, the consistency of measurement results is ensured, and in addition, measurement can be carried out after the displacement amount of the telescopic rod is amplified, so that the accuracy of detection results is improved, and the large measurement result error caused by too small displacement amount of the telescopic rod is reduced.

The utility model relates to the field of construction safety, concretely relates to a kind of for safety belt collocation multi-point adsorption type safety fixing device, including main frame, sucking disc, pressure outlet, pressure ware, power, connecting buckle, connecting rope, hook, alarm, the sucking disc evenly distributes in the bottom of the main frame, the pressure outlet is set in the side of one vertex of the main frame, the connecting buckle is set in the front of the main frame, the connecting rope connects the connecting buckle and hook, the pressure ware is set in the main frame and is connected with the sucking disc, the power is electrically connected with the alarm, pressure ware, after sucking disc and adsorption operating surface contact, the pressure ware empties the gas in the sucking disc by the pressure outlet. The adsorption, illuminating property, convenience, safety of the device provide better security guarantee for the safety of worker in construction site, more convenient in construction process, improve the safety index of construction site.

This invention discloses a PCB elasticity testing device, relating to the field of PCB testing technology. The device includes a worktable and a backplate. An X-axis module is fixed on the backplate, and a Z-axis module is mounted on the X-axis module. An elasticity testing component is mounted on the Z-axis module via a first slide rail. A Y-axis module is mounted on the worktable, and a testing platform is mounted on the Y-axis module. By incorporating the elasticity testing component, a constant pressure can be applied to the PCB buttons. The bottom of the elasticity testing piece for the press test is cylindrical, simulating the contact surface of a human finger. The device can repeatedly press to test the lifespan of the PCB buttons. This device eliminates the need for manual pressing, providing fully automated testing. A pressure sensor is mounted above the elasticity testing piece to ensure consistent force during each press.

The invention provides a bottom-entering type crusher which comprises a barrel, a crushing mechanism is fixedly connected to the middle of the barrel, a fixing sleeve is fixedly connected to the middle of the lower end of the barrel, the crushing mechanism comprises a driving motor, the driving motor is fixedly connected to a flange structure preset at the lower end of the fixing sleeve, and the output end of the driving motor is fixedly connected with a rotating shaft. The rotating shaft extends upwards into the fixed sleeve, the side wall of the upper portion of the rotating shaft is fixedly connected with a bearing, the upper portion of the rotating shaft is fixedly connected with a rotating hub, the rotating hub is located above the bearing, the outer side of the fixed sleeve is sleeved with a rotating sleeve, and a plurality of screws are arranged on the side wall of the rotating sleeve. The screw rod is sleeved with a plurality of lower cutters and distance rings which are arranged at intervals, so that the distance between the lower cutters is adjusted according to the replacement of the distance rings with different height specifications, and the height of materials in the barrel body is adapted. According to the invention, the height of the lower cutter is adjusted by replacing the distance ring, so that the operation stability of the crushing mechanism is improved.

The utility model discloses glass batching equipment. The glass batching equipment mainly comprises a pipe body, a rotating shaft, a turning plate and a driving assembly, the rotating shaft rotationally penetrates through the pipe body, and the two ends of the rotating shaft are located outside the pipe body; the turning plate is fixedly installed on the rotating shaft and can rotate along with the rotating shaft, the driving assemblies are simultaneously and symmetrically connected to the two ends of the rotating shaft in a transmission mode so as to drive the turning plate to rotate, and each driving assembly comprises an adjusting structure used for achieving symmetrical transmission connection of the two ends of the rotating shaft. The two ends of the rotating shaft are in transmission connection with the driving assemblies, the two ends of the rotating shaft are in symmetrical transmission connection through the adjusting structures, it is guaranteed that the stress at the two ends of the rotating shaft is consistent, the rotating angle is consistent, the possibility that the rotating shaft and the turning plate are twisted and bent can be obviously reduced, and the phenomenon that the rotating shaft or the turning plate is broken is avoided; the quality and efficiency of glass batching are ensured, the maintenance frequency of the turning plate and the rotating shaft is reduced, and the maintenance cost of equipment is reduced.

The invention discloses an integrated device for the occurrence and determination of corn lodging, comprising a frame installed behind a traction device, a plurality of rows of stalk strength determination devices installed in the frame, each row of stalk strength determination devices corresponding to a crop of a ridge, a lateral arrangement of stalk lodging pushing rods installed on the pressure test head at the lower end of each stalk strength determination device; the height of each row of stalk strength determination devices decreases from front to back; the lower end of the stalk strength determination device tilts forward and is substantially perpendicular to the lodged crop stalks. The advantages of the invention are: through traction by the traction device, multiple stalk strength determination devices can be driven to move forward at the same speed, ensuring that the force on the same height of corn is consistent; while simulating lodging, the pressure is measured and recorded, realizing the integration of the occurrence and determination of lodging; the determination of large-scale experimental materials can be completed uniformly and consistently in a short time, greatly improving the experimental efficiency.

The invention relates to the technical field of intelligent molded case circuit breakers, in particular to a bidirectional automatic clutch mechanism which comprises a driving wheel, a driven wheel, a main shaft, a connecting sleeve, a plurality of locking sliding blocks and a return elastic piece. The driving wheel is fixedly connected with the connecting sleeve, the driven wheel is rotatably connected with the main shaft, the driven wheel partially extends into the connecting sleeve and is rotatably connected with the connecting sleeve, a cylindrical groove is formed in the end, extending into the connecting sleeve, of the driven wheel, and a plurality of protruding blocks and a plurality of clamping notches which are equally divided along the circumference of the cylindrical groove are evenly arranged on the inner wall of the cylindrical groove. A plurality of locking sliding block grooves equally divided along the circumference of the connecting sleeve are evenly formed in the end, overlapped with the driven wheel, in the connecting sleeve, a plurality of sliding block groove center through holes corresponding to the locking sliding block grooves in a one-to-one mode are formed in the end, away from the driven wheel, in the connecting sleeve, and the locking sliding block grooves communicate with the sliding block groove center through holes. A locking sliding block is arranged in each locking sliding block groove, and the other end of each elastic piece penetrates through the corresponding sliding block groove center through hole and the corresponding locking sliding block groove to be connected with the corresponding locking sliding block in a clamped mode in a one-to-one correspondence mode. The mechanism can realize automatic bidirectional clutch, and is compact in structure and small in occupied space.

The application discloses a high-temperature co-electrolysis cell stack module structure and relates to the technical field of fuel cells, which comprises an electric pile group and a pipeline assembly; the electric pile group comprises six electric piles which are arranged in a regular hexagon around a central position and are left empty in the central position; the electric pile comprises a top plate and a bottom plate, and the top plate and the bottom plate are in a regular hexagon structure; the electric pile further comprises four groups of stretching assemblies, the stretching assembly comprises a pull rod and a spring, and the spring is in a stretching state; the pipeline assembly comprises an air inlet pipeline and an air outlet pipeline; the gas entering a total gas inlet is shunted to the first gas inlets of the six electric piles, and the gas entering a total air inlet is shunted to the first air inlets of the six electric piles; the air outlet pipeline comprises a total gas outlet and a total air outlet, and the gas flowing out of the first gas outlets and the first air outlets of the six electric piles is respectively converged to the total gas outlet and the total air outlet. The application adopts a honeycomb six-pile ring arrangement structure, and the compactness and the modularization level of the system are significantly improved.

The utility model provides a leadless coating structure for resistor production, which comprises a transmission wheel, a base arranged above the transmission wheel, a sealing cover fixedly mounted at the upper end of the base, and a connecting strip movably mounted between the base and the sealing cover. According to the leadless coating structure for resistor production, through the arrangement of the structures such as the protrusions, the limiting holes, the base and the limiting springs, the protrusions are ingeniously matched with the limiting holes, and it is ensured that the transmission wheels can accurately transmit power to the connecting strips. In the transmission process, the protrusions are clamped into the limiting holes all the time, so that the connecting strips stably move in the preset direction and do not deviate or shake, and the stability of the structure is further enhanced through the arrangement of the limiting springs. Under the condition of thermal expansion and cold contraction, the limiting spring can pull the base to prevent the base from deviating outwards due to thermal expansion, the limiting spring can be matched with the base to recover to the initial state during contraction, and the stability of the base under different temperature conditions is guaranteed.

A super-large screen changing device for filtering and mixing, characterized in that it comprises an outer shell composed of an inlet plate, an outlet plate and pads clamped between the upper and lower ends of the inlet plate and the outlet plate, a slide plate type filter unit installed in a slideway composed of the outlet plate, the inlet plate and the upper and lower pads, a power mechanism for driving the slide plate type filter unit to reciprocate along the slideway is connected to one side of the slide plate type filter unit through a connecting block; the slide plate type filter unit is provided with a material channel and an integrated porous plate, and a filter screen is provided on the feed side of the integrated porous plate; a petal-type dynamic sealing disk with a hollow structure in the middle part and a sealing auxiliary spring are provided between the mating surfaces of the inlet plate and the slide plate type filter unit, and the feed port and the mixing channel of the inlet plate are of a honeycomb structure; a petal-type static sealing disk with a hollow structure in the middle part is provided between the mating surfaces of the outlet plate and the slide plate type filter unit, and the discharge port and the mixing channel of the inlet plate are of a honeycomb structure.

This utility model belongs to the technical field of carbon fiber cable processing equipment, specifically a precision stranding control device for carbon fiber cable processing. It includes a base plate, with two support plates fixedly connected to its upper surface. A turntable is rotatably mounted on the inner surface of each support plate. A fixing ring is fixedly connected to the side wall of the right turntable, and a worm gear ring is rotatably mounted on the side wall of the fixing ring. Multiple sliding grooves are formed on the inner surface of the fixing ring. A tensioning mechanism is installed inside the base plate, including a tensioning plate slidably mounted inside the sliding grooves. A sliding column is fixedly connected to the side wall of the tensioning plate. This utility model has a reasonable structure, and through the linkage and synchronous drive of the worm gear and worm wheel, all tensioning mechanisms are activated, ensuring consistent force on multiple strands of wire and avoiding stranding defects caused by uneven tension. It is particularly suitable for brittle carbon fiber materials.

The self-stress hollow slab structure of the bridge comprises a hollow slab and a self-stress rigid connection beam, the hollow slab is composed of a self-stress bottom plate, two thin rib plates and a top plate, and the self-stress rigid connection beam is poured above the extending parts of the two adjacent bottom plates; the self-stress rigid connection beam is composed of micro-expansion concrete, a rigid connection beam longitudinal rib, a rigid connection beam stirrup, a left single-limb rib, a right single-limb rib, two adjacent lower inclined steel bar extending parts and two adjacent upper inclined steel bar extending parts. The construction method comprises the following steps: a) welding the expansion plates and the longitudinal self-stress ribs; b) pouring high-expansion concrete; c) supporting an inner template of the hollow slab; d) pouring common concrete; e) binding a steel reinforcement framework of the self-stress rigid connection beam; and (f) micro-expansive concrete is poured. According to the bridge self-stress hollow slab structure and the construction method thereof, rigid connection between the hollow slab and the self-stress rigid connection beam is achieved, the situation that a single hollow slab is stressed is avoided, and the service life of the hollow slab is prolonged.

The present invention discloses a marine engineering sliding traction extension device and method, comprising a wire rope extension component and a tool rope extension component connected thereto; one end of the wire rope extension component is connected to the main lug plate on the cargo at the backyard of the dock, and the other end is connected to one end of the tool rope extension component; the other end of the tool rope extension component is connected to the main lug plate on the transport ship; the wire rope extension component comprises a first pulley group, a second pulley group and a traction wire rope which are sequentially connected to the main lug plate on the cargo through a wire rope; the tool rope extension component comprises a plurality of tool ropes sequentially connected to the second pulley group, and the tool rope at the end is connected to a cylinder tensioning device, and the cylinder tensioning device is connected to the main lug plate on the transport ship. The present invention solves the problem of long-distance traction and transportation of large marine engineering products from the backyard of the dock when the large marine engineering products are launched by sliding.

The invention discloses a secondary cable stripping tool, wherein a cable slide I, a cable slide II, and a cable pressing block are sequentially distributed along the annular direction in an annular bracket; the cable pressing block is in a hemispherical structure, and the flat end of the cable pressing block is connected to the annular bracket through a pressure head, and a blade is fixed on the pressure head, and the tip of the blade is used to strip the cable after passing through the spherical end of the cable pressing block; the cable slide I and the cable slide II have the same structure, and the surfaces contacting the cable are both in an arc curved surface structure. During the process of the cable passing through the annular bracket and being stripped by the blade, the cable is clamped and fixed by the cable slide I, the cable slide II, and the cable pressing block. Compared with manual cable stripping with a stripping knife, the invention is more efficient, faster, safer, and has less insulation damage. The stripped secondary cable insulation layer is in a straight line state, with a consistent depth, and has a higher process.

The present invention relates to a die-casting mold using a composite core-pulling structure, including an upper mold frame and a lower mold frame, an upper mold core and a lower mold core stacked up and down are installed between the upper mold frame and the lower mold frame, a mold cavity is provided between the upper mold core and the lower mold core, a front core-pulling block, a rear core-pulling block and a right core-pulling hole column are respectively provided at the front, rear and right sides of the upper end of the lower mold core, each core-pulling block and the right core-pulling hole column are equipped with a driving device, and a composite core-pulling structure is provided on the right side of the upper mold frame. The present invention designs a new composite core-pulling structure, which effectively reduces the mold height, makes the layout of the movable and fixed molds more reasonable, and reduces the shaking and deformation of the product caused by the pulling of the slider, and the mold pressing plate can be used normally without the need for a special installation method.

The utility model discloses a film frame system which comprises a film winding base, a double chain wheel, a double chain wheel, a guide wheel, a guide roller, a swing roller, a weight sensor, a film outlet roller, a proximity sensor, a main chain wheel, a direct current motor, a rubber coating roller, a film breaking mechanism, a film penetrating breaking shaft, an electromagnet, a film frame shell, a handle, a shell and a mounting plate. A direct current motor is fixedly connected to the inner wall of one side of the membrane frame shell, the output end of the direct current motor is fixedly connected with a main chain wheel, a guide roller is arranged on one side of the main chain wheel, a double chain wheel is arranged on one side of the guide roller, and a double chain wheel is arranged on one side of the double chain wheel; the film feeding adjusting function is designed, tension data are detected through the weight sensor, and the film feeding speed of the film frame is automatically adjusted by combining the walking speed of the winding machine, so that the stress of each corner is kept consistent during winding, constant-tension film feeding is achieved, and a product can be protected from being damaged during winding.

The application discloses a stress-free assembly method for an adjustable focus off-axis beam expanding system, which comprises the following steps: aging treatment during structure processing, glue injection and solidification of the structure and optical components, stress release, structure mounting surface covering and constant force fastening, etc. The application realizes stress-free assembly of the adjustable focus off-axis beam expanding system which comprises two plane mirrors, one secondary mirror, one primary mirror and a mirror frame, and a truss structure, wherein the system wavefront RMS change is less than 10% after environmental test, meanwhile, the assembly process is controllable, and the efficiency of optical mechanical system assembly is improved.

The invention provides a framework draw bar support bushing assembling method, which is characterized in that a bushing conveying device is used for assembling, the bushing conveying device comprises a threaded rod, a nut, a positioning pressing plate, a hydraulic oil cylinder, a telescopic rod and a bushing, the position of the hydraulic oil cylinder is fixed by utilizing the nut and the positioning pressing plate, and vertical force can be conveniently and quickly applied to the bushing so as to press the bushing in place; during implementation, a tool is attached to fix the position of the oil cylinder, then the lining is placed in the mounting hole, and the telescopic rod is pressed downwards to complete assembly. According to the device and the method, the position of the hydraulic oil cylinder is accurately fixed through the interaction of the positioning pressing plate and the nut, it is ensured that the magnitude and the direction of pressure borne by the bush are kept consistent in the bush pressing process, the bush can be stably pressed into a mounting hole of a support, the situation that the position of the bush deviates or inclines due to manual knocking is effectively prevented, and the service life of the bush is prolonged. And therefore, the matching precision of the bushing and the support mounting hole is improved.

This invention proposes a method for lifting and raising a single-column cantilever cap beam, belonging to the field of building construction technology, including the following steps: S1: Clear the soil covering the pier cap location to expose the side of the pier cap; S2: Install reinforcing bars on the side of the pier cap to expand the pier cap; S3: Install the beam bottom support and clamp beam formwork under the cap beam, and construct the clamp beam around the pier column; S4: After the clamp beam construction is completed, remove the clamp beam formwork and beam bottom support; S5: Install steel pipe columns and lifting equipment on the pier cap; S6: Cut the pier column to form an upper pier column and a lower pier column; S7: Operate the lifting equipment to lift the clamp beam, and cyclically lift the upper pier column and the cap beam; S8: Extend the pier column height; S9: Remove the clamp beam; S10: Remove the lifting equipment and steel pipe columns. A clamp beam is constructed at the bottom of the cap beam to support the bottom of the cap beam. Steel pipe columns and jacking equipment are arranged around the outer side of the pier column below the clamp beam. During jacking, the stress on the cap beam is basically the same as the normal stress, and cracking will not occur, thus ensuring the quality of the project.

This invention relates to the field of vacuum glass production and discloses a vacuum glass sealing device, including a worktable with multiple rows of synchronously rotating rollers, a positioning groove and a limiting groove located between the rollers, a positioning component for longitudinally positioning the glass in the positioning groove, and a limiting component for laterally limiting the glass in the limiting groove, as well as two liftable conductive probe assemblies and a pressure application component. This invention not only simplifies and reduces the cost of metal edge sealing of vacuum glass but also facilitates large-scale production. Therefore, this invention is of great significance for reducing vacuum glass production costs, minimizing environmental pollution, and expanding the application range of vacuum glass. This invention overcomes the shortcomings of traditional sealing methods, such as high sealing temperatures, complex processes, and stringent sealing conditions, improving the sealing quality and production efficiency of vacuum glass, and is suitable for widespread application.

The utility model discloses a flexible combination cable for a mobile system, which comprises two signal core wires and two control core wires, the signal core wires and the control core wires are twisted into a cable, the center and the outer side of the cable are filled with filling ropes, the signal core wires and the control core wires of the cable are wrapped by a wrapping tape, and a sheath is extruded on the wrapping tape; each signal core wire comprises a signal conductor, the signal conductor is formed by twisting a plurality of Category 6 + copper wires of phi 0.05 mm, a signal insulating layer is extruded on the signal conductor, a winding shielding layer is wound on the signal insulating layer, and the winding directions of the winding shielding layers in the two signal units are opposite; the control core wire comprises a control conductor, the control conductor is formed by twisting a plurality of Category 6 + copper wires of phi 0.05 mm, and a control insulating layer is extruded on the control conductor; the twisting direction of the signal conductors, the twisting direction of the control conductors and the twisting direction during cabling are consistent. The flexible cable is not only good in flexibility, but also excellent in electrical performance.

The present invention discloses a wire and cable cross-linking test detection device and a method for using the same. The detection device includes: a heating plate located on one side of a control console, and the control console controls the temperature of the heating plate; an outer shield includes a side wall and a top arranged around the heating plate; a force-applying assembly includes a sample fixing rod, a load support rod and a load tray, the load support rod passes through the top, one end of the load support rod is connected to the sample fixing rod, and the other end is connected to the load tray, the sample fixing rod and the load support rod form a T-shape, and the sample fixing rod is located between the heating plate and the top; the support assembly is located on the side of the top away from the heating plate, the support assembly includes a connecting rod, a supporting structure and a rotating structure, one end of the connecting rod is bent, and the other end is connected to the supporting structure and the rotating structure, the supporting structure supports the connecting rod, and rotating the connecting rod causes the rotating structure to rotate, so that the force-applying assembly moves in a direction perpendicular to the heating plate. The cross-linking test is carried out using the detection device, and the test results are accurate and easy to operate.

The invention relates to the technical field of ultrasonic water meters, particularly provides a measuring tube of an ultrasonic water meter and the ultrasonic water meter, and aims to solve the problem of how to meet the dual requirements of high-precision metering and energy conservation in the practical application of the ultrasonic water meter. In order to achieve the purpose, the measuring pipe of the ultrasonic water meter comprises a middle pipe section, the rectifier is arranged on at least one side of the middle pipe section in the axial direction, and the rectifier comprises a spoke wheel and a plurality of spoke pieces arranged in the circumferential direction of the inner wall of the spoke wheel; the reflector plate support is provided with a first end and a second end which are opposite, the first end is located between the middle pipe section and the rectifier and used for installing the reflector plate, the second end extends towards the rectifier and is connected with the radial plates, and the sectional area of the reflector plate support is gradually reduced in the direction from the first end to the second end. The measuring precision of the measuring tube can be improved, and the pressure loss can be reduced, so that the dual requirements of high-precision measurement and energy conservation are met.