High-temperature-resistant flow meter

Abstract

The invention relates to the technical field of flow measurement, in particular to a high-temperature-resistant flow meter which comprises a meter, hollow steel is fixedly connected to the left side and the right side of the front surface of the meter, a conversion component is arranged at the bottom of the hollow steel, an induction component is fixedly arranged on the front surface of the meter, and an emergency stop button is fixedly arranged on the front side of the meter. The conversion part comprises a first supporting plate, a flow force part is arranged at the bottom of the first supporting plate, and the top of the first supporting plate is fixedly connected with the bottom of the hollow steel; according to the device, non-contact measurement is achieved through three-stage energy conversion (from fluid kinetic energy to mechanical energy to electromagnetic signals), the flow measurement range reaches 1: 50 through the optimal design of the U-shaped flow guide frame and the cam groove, the precision grade can reach 0.5 grade, and through the synergistic effect of a heat dissipation system and a temperature compensation algorithm, the measurement precision is improved. And the measurement error of + / -0.8% is kept in the environment temperature range of-50 DEG C to 300 DEG C.

Description

Technical Field

[0001] The present invention relates to the technical field of flow measurement, and particularly to a high-temperature resistant flowmeter. Background Art

[0002] As a core link in industrial process control, the accuracy and reliability of flow measurement directly affect the operation efficiency of the production system. In high-temperature industrial scenarios such as petrochemical and metallurgical smelting, conventional flowmeters face multiple technical bottlenecks: Thermal stability defect: In high-temperature working conditions above 400°C, the metal transmission components of traditional mechanical flowmeters have different thermal expansion coefficients of materials, resulting in changes in the clearances of kinematic pairs and causing mechanical jamming phenomena. For example, the torque loss of the gear transmission system increases by 40% when the temperature gradient ΔT = 200°C, seriously restricting the measurement accuracy; Thermal damage to electronic components: Under the conduction of high-temperature media, contact sensors are prone to cause thermal drift of the signal conditioning circuit. Typically, the zero drift rate of resistance strain gauges exceeds 0.05% / °C; Deterioration of dynamic response: When the fluid temperature changes suddenly in existing turbine flowmeters, the decrease in the elastic modulus of the impeller material causes a shift in the resonance frequency. When the flow velocity > 30 m / s, the vibration amplitude exceeds the D-class limit of ISO 10816-3 standard, resulting in early bearing failure; Insufficient corrosion resistance: In an environment of high-temperature sulfur-containing media, the corrosion rate of ordinary carbon steel impellers can reach 0.12 mm / year, and the impellers sprayed with hard alloy coatings are prone to coating spalling due to interfacial thermal stress. Summary of the Invention

[0003] Therefore, the present invention provides a high-temperature resistant flowmeter to solve the above problems.

[0004] The present invention provides the following technical solution: A high-temperature resistant flowmeter includes a meter. On the left and right sides of the front surface of the meter, hollow steels are fixedly connected. A conversion component is provided at the bottom of the hollow steel. An induction component is fixedly provided on the front surface of the meter. An emergency stop button is fixedly provided on the front side of the meter; The conversion component includes a first support plate. A flow force component is provided at the bottom of the first support plate. The top of the first support plate is fixedly connected to the bottom of the hollow steel; The flow force component includes a protective shell. An outer connecting pipe is fixedly connected to the bottom of the protective shell. A first rotating rod is rotatably connected to the inner wall of the outer connecting pipe; The induction component includes a fixed hinge. The back surface of the fixed hinge is fixedly connected to the front surface of the meter.

[0005] As a preferred solution of the present invention, a fixed frame is fixedly connected to the back surface of the first support plate. A sliding rod is slidably connected to the inner wall of the fixed frame. A connecting block is fixedly connected to the top of the sliding rod. A driven rod is fixedly connected to the front end of the connecting block. A cam column is fixedly connected to the top of the first rotating rod. A cam groove is formed on the surface of the cam column. The groove wall of the cam groove abuts against the surface of the driven rod. A signal line is fixedly connected to the inner wall of the fixed hinge. A magnetic ring is fixedly connected to the front end of the signal line. A mating pin is fixedly connected to the top of the connecting block. The mating pin is located at the bottom of the magnetic ring. The output end of the meter is electrically connected to the receiving end of the signal line.

[0006] As a preferred solution of the present invention, the first rotating rod is made of stainless steel material, and the first rotating rod is resistant to weak corrosive media such as air, steam and water.

[0007] As a preferred solution of the present invention, the material of the magnetic ring is an inductance coil, and the magnetic ring is a device that works based on the principle of electromagnetic induction.

[0008] As a preferred solution of the present invention, a first bevel gear is fixedly connected to the bottom of the first rotating rod. Sealing plates are fixedly connected to the left and right sides of the inner wall of the outer connecting pipe. An inner water flow box is fixedly connected to the inner wall of the sealing plate. A second rotating rod is rotatably connected to the inner wall of the inner water flow box. A third rotating rod is rotatably connected to the inner wall of the inner water flow box. An impeller is fixedly connected to the middle of the surface of the third rotating rod. U-shaped flow guiding frames are fixedly connected to each blade of the impeller.

[0009] As a preferred solution of the present invention, a driven gear is fixedly connected to the front side of the surface of the second rotating rod. A driving gear is fixedly connected to the rear side of the surface of the third rotating rod. The surface of the driving gear meshes with the surface of the driven gear. A second bevel gear is fixedly connected to the rear end of the second rotating rod. The first bevel gear meshes with the second bevel gear. A molybdenum disulfide solid lubricating layer is coated on the tooth surfaces of the driving gear and the driven gear. High-temperature resistant lubricating grease is filled in the bearing seats of the second rotating rod and the third rotating rod, and its temperature tolerance range is from -50°C to 300°C.

[0010] As a preferred solution of the present invention, the material of the impeller is TPX material, and an anti-corrosion coating is sprayed on the surface of the impeller.

[0011] As a preferred solution of the present invention, a heat insulation layer is embedded in the inner wall of the protective shell. The heat insulation layer is composed of an aerogel composite material. Heat dissipation fins are provided on the outer surface of the protective shell. The heat dissipation fins are distributed axially and are parallel to the fluid flow direction of the outer connecting pipe; The inner cavity of the internal water box is provided with a temperature sensor, which is electrically connected to the input end of the meter. The meter is internally provided with an adaptive calibration module for dynamically correcting the flow calculation parameters according to the temperature signal. The inside of the hollow steel is provided with a cooling flow channel, and the inlet and outlet of the cooling flow channel extend to the side wall of the meter and are communicated with an external circulating cooling system.

[0012] As a preferred solution of the present invention, the anti-corrosion coating is a polytetrafluoroethylene coating. The edge of the blade of the impeller is provided with a silicon carbide wear-resistant layer. The flow-facing surface of the U-shaped guide frame is a streamline curved surface, and its radius of curvature is inversely proportional to the fluid flow velocity.

[0013] As a preferred solution of the present invention, the emergency stop button is integrated with a wireless communication module, and the wireless communication module supports receiving remote emergency shutdown instructions. A dual-redundancy relay is connected in series in the power supply circuit of the meter, and the trigger end of the relay is electrically connected to the output end of the emergency stop button.

[0014] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, after the fluid enters the outer connecting pipe, it impacts the impeller in the inner water box. The U-shaped flow guide frame on the impeller blades automatically adjusts the curvature of the flow-facing surface according to the fluid velocity (the higher the flow velocity, the smaller the radius of curvature), efficiently converting the fluid kinetic energy into rotational mechanical energy. The impeller drives the third rotating rod to rotate at an angular velocity of ω = Kv² (K is the structural coefficient, v is the flow velocity). The polytetrafluoroethylene coating and silicon carbide wear-resistant layer sprayed on its surface ensure durability in high-temperature corrosive media. The driving gear at the end of the third rotating rod meshes with the driven gear on the second rotating rod to form a speed-increasing ratio of 1:3 for transmission. The molybdenum disulfide lubricating layer reduces the frictional loss at high temperatures. The second rotating rod is transmitted through the second bevel gear and the first bevel gear of the first rotating rod to achieve a 90° steering drive, transmitting the rotational motion to the vertical direction. This transmission system is supported by bearings with high-temperature grease resistant to 300 °C to ensure stable operation under thermal expansion conditions. The cam column at the top of the first rotating rod rotates at a speed of f = ω / 2π. The involute-shaped cam groove opened on its surface pushes the driven rod to perform a simple harmonic motion. The connecting block drives the mating needle to vibrate vertically according to the law of Δh = Asin(2πft) (A is the amplitude). The needle cuts the magnetic induction lines in the annular magnetic field of the magnetic ring and generates an induced electromotive force E = -N(dΦ / dt) according to Faraday's law, forming a pulse signal proportional to the vibration frequency f. Signal processing and metering stage: The pulse signal generated by the magnetic ring is transmitted to the meter through the signal line. The built-in adaptive calibration module in the meter dynamically adjusts the flow calculation formula Q = K(T)·f according to the real-time temperature T fed back by the temperature sensor, where K(T) = K0[1 + α(T - T0)] is the temperature compensation coefficient, α is the material thermal expansion coefficient. The meter also monitors the circulation state of the cooling channel and automatically triggers the forced convection cooling of the heat dissipation fins when the detected temperature exceeds the threshold. The emergency stop button directly cuts off the power supply of the meter through a dual-redundancy relay. The built-in wireless communication module in the meter can receive remote shutdown instructions. The aerogel thermal insulation layer in the protective shell isolates the external high-temperature environment from the internal transmission mechanism. Combined with the low thermal conductivity characteristics of the TPX material impeller, it ensures the normal operation of the core components under the working condition of 400 °C. This device realizes non-contact measurement through three-level energy conversion (fluid kinetic energy to mechanical energy to electromagnetic signal). The optimized design of its U-shaped flow guide frame and cam groove enables the flow measurement range to reach 1:50, and the accuracy level can reach 0.5 level. The synergistic effect of the heat dissipation system and the temperature compensation algorithm enables it to maintain a measurement error of ±0.8% in the environmental temperature range of -50 °C to 300 °C. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is the Figure 1 partial structural cross-sectional view of the present invention; Figure 3 is the Figure 2 partial structural schematic diagram of the present invention; Figure 4 For the present invention Figure 1 is a magnified view of a partial structure in the present invention.

[0016] In the figure: 1, meter; 2, hollow steel; 3, induction component; 4, emergency stop button; 5, conversion component; 6, fluid force component; 301, magnetic ring; 302, fixed hinge; 303, signal wire; 501, mating pin; 502, follower rod; 503, cam groove; 504, cam post; 505, first support plate; 506, sliding rod; 507, fixed frame; 508, connecting block; 601, inner water flow box; 602, outer connecting pipe; 603, sealing plate; 604, protective shell; 605, first rotating rod; 606, driving gear; 607, first bevel gear; 608, driven gear; 609, second bevel gear; 610, second rotating rod; 611, third rotating rod; 612, impeller; 613, U-shaped flow guide frame. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-4 , the technical solutions provided by the present invention specifically include the following embodiments: Embodiment: A high-temperature resistant flowmeter includes a meter 1. Both the left and right sides of the front surface of the meter 1 are fixedly connected with hollow steels 2. A conversion component 5 is arranged at the bottom of the hollow steel 2. An induction component 3 is fixedly arranged on the front surface of the meter 1. An emergency stop button 4 is fixedly arranged on the front side of the meter 1; The conversion component 5 includes a first support plate 505. A fluid force component 6 is arranged at the bottom of the first support plate 505. The top of the first support plate 505 is fixedly connected with the bottom of the hollow steel 2; The fluid force component 6 includes a protective shell 604. The bottom of the protective shell 604 is fixedly connected with an outer connecting pipe 602. The inner wall of the outer connecting pipe 602 is rotatably connected with a first rotating rod 605; The induction component 3 includes a fixed hinge 302. The back surface of the fixed hinge 302 is fixedly connected with the front surface of the meter 1; Through the bilateral support structure of the hollow steel 2, the symmetrical distribution of mechanical loads is realized, enabling the vibration resistance of the equipment to reach Class C of ISO 10816-3 standard (vibration velocity ≤ 4.5 mm / s). The separated layout of the conversion component 5 and the fluid force component 6, combined with the internal cooling flow channel in the hollow steel (flow velocity ≥ 2 m / s), reduces the heat conduction rate of the high-temperature medium to 15 W / m²·K, effectively protecting the electronic components of the meter; The back surface of the first support plate 505 is fixedly connected with a fixed frame 507. A sliding rod 506 is slidably connected to the inner wall of the fixed frame 507. The top of the sliding rod 506 is fixedly connected with a connecting block 508. The front end of the connecting block 508 is fixedly connected with a driven rod 502. The top of the first rotating rod 605 is fixedly connected with a cam column 504. A cam groove 503 is formed on the surface of the cam column 504. The groove wall of the cam groove 503 abuts against the surface of the driven rod 502. A signal line 303 is fixedly connected to the inner wall of the fixed hinge 302. The front end of the signal line 303 is fixedly connected with a magnetic ring 301. A mating pin 501 is fixedly connected to the top of the connecting block 508. The mating pin 501 is located at the bottom of the magnetic ring 301. The output end of the meter 1 is electrically connected to the receiving end of the signal line 303; The involute profile of the cam groove 503 makes the displacement error of the driven rod 502 ≤ ±0.05 mm. Combined with the linear bearing guidance of the sliding rod 506 (friction coefficient μ = 0.002), the mechanical energy-displacement conversion efficiency ≥ 92% is achieved. The fixed connection design of the connecting block 508 and the mating pin 501 can absorb the thermal expansion deformation of ±1.2 mm, avoiding movement jamming under high-temperature conditions. The fixed hinge 302 supports an angle adjustment of ±15°, ensuring that the axial deviation between the mating pin 501 and the magnetic ring 301 ≤ 0.1 mm, eliminating the influence of installation errors on measurement; The material of the first rotating rod 605 is stainless steel. The first rotating rod 605 is resistant to weak corrosive media such as air, steam, and water.

[0019] The material of the magnetic ring 301 is an inductance coil. The magnetic ring 301 is a device that works based on the principle of electromagnetic induction.

[0020] The bottom of the first rotating rod 605 is fixedly connected with a first bevel gear 607. Sealing plates 603 are fixedly connected to the left and right sides of the inner wall of the outer connecting pipe 602. An inner water box 601 is fixedly connected to the inner wall of the sealing plate 603. A second rotating rod 610 is rotatably connected to the inner wall of the inner water box 601. A third rotating rod 611 is rotatably connected to the inner wall of the inner water box 601. An impeller 612 is fixedly connected to the middle of the surface of the third rotating rod 611. U-shaped flow guiding frames 613 are fixedly connected to each blade of the impeller 612; The curvature radius R of the U-shaped flow guiding frame and the flow velocity v satisfy R = K / v (K = 0.15 m² / s), enabling the impeller efficiency to remain ≥ 75% within the flow velocity range of 1 - 50 m / s.

[0021] The front side of the surface of the second rotating rod 610 is fixedly connected to the driven gear 608, and the rear side of the surface of the third rotating rod 611 is fixedly connected to the driving gear 606. The surface of the driving gear 606 is meshed with the surface of the driven gear 608. The rear end of the second rotating rod 610 is fixedly connected to the second bevel gear 609, and the first bevel gear 607 is meshed with the second bevel gear 609. The tooth surfaces of the driving gear 606 and the driven gear 608 are coated with a molybdenum disulfide solid lubricating layer. The bearing seats of the second rotating rod 610 and the third rotating rod 611 are filled with high-temperature resistant grease, which can withstand a temperature range of -50°C to 300°C.

[0022] The material of the impeller 612 is TPX material, and the surface of the impeller 612 is sprayed with an anti-corrosion coating.

[0023] The inner wall of the protective shell 604 is embedded with a heat insulation layer made of aerogel composite material. The outer surface of the protective shell 604 is provided with heat dissipation fins, which are distributed along the axial direction and parallel to the fluid flow direction of the external connecting pipe 602; The inner cavity of the inner water box 601 is provided with a temperature sensor, which is electrically connected to the input end of the meter 1. The meter 1 has a built-in adaptive calibration module for dynamically correcting the flow calculation parameters according to the temperature signal. A cooling channel is provided inside the hollow steel 2. The inlet and outlet of the cooling channel extend to the side wall of the meter 1 and are connected to the external circulation cooling system. The anti-corrosion coating is a polytetrafluoroethylene coating, the blade edges of the impeller 612 are provided with a silicon carbide wear-resistant layer, and the flow-facing surface of the U-shaped guide frame 613 is a streamlined curved surface, and its curvature radius is inversely proportional to the fluid flow rate; The silicon carbide wear-resistant layer (hardness ≥ 2800HV) reduces the wear rate of the blade edge in media containing solid particles to ≤ 0.01mm / thousand hours, which is 8 times longer than that of ordinary steel impellers.

[0024] The emergency stop button 4 is integrated with a wireless communication module, which supports remote emergency shutdown command reception. A dual redundant relay is connected in series in the power supply circuit of the meter 1, and the trigger end of the relay is electrically connected to the output end of the emergency stop button 4; The pulse signal generated by the magnetic ring 301 is transmitted to the meter 1 through the signal line 303. The built-in adaptive calibration module in the meter dynamically adjusts the flow calculation formula Q = K(T)·f according to the real-time temperature T fed back by the temperature sensor, where K(T)=K0[1+α(T - T0)] is the temperature compensation coefficient, α is the coefficient of thermal expansion of the material. The meter also monitors the circulation status of the cooling channel and automatically triggers the forced convection cooling of the heat dissipation fins when the detected temperature exceeds the threshold. The emergency stop button 4 directly cuts off the power supply of the meter through a dual-redundancy relay. The built-in wireless communication module in the meter can receive remote shutdown instructions. The aerogel thermal insulation layer in the protective shell 604 isolates the external high-temperature environment from the internal transmission mechanism, and cooperates with the low thermal conductivity characteristics of the TPX material impeller to ensure the normal operation of the core components under the working condition of 400°C.

[0025] In the present invention, the working principle of the high-temperature resistant flowmeter is based on a multi-stage conversion mechanism of hydrodynamics - mechanical energy - electromagnetic induction. The specific working process is as follows: 1. Fluid dynamic acquisition stage: After the fluid enters the outer connecting pipe 602, it impacts the impeller 612 in the inner water box 601. The U-shaped guide frame 613 on the impeller blade automatically adjusts the curvature of the flow-facing surface according to the fluid velocity (the higher the flow velocity, the smaller the radius of curvature), efficiently converting the fluid kinetic energy into rotational mechanical energy. The impeller 612 drives the third rotating rod 611 to rotate at an angular velocity of ω = Kv² (K is the structural coefficient, v is the flow velocity). The polytetrafluoroethylene coating and silicon carbide wear-resistant layer sprayed on its surface ensure durability in high-temperature corrosive media; 2. Mechanical transmission amplification stage: The driving gear 606 at the end of the third rotating rod 611 meshes with the driven gear 608 on the second rotating rod 610 to form a speed-increasing ratio of 1:3 for meshing transmission. The molybdenum disulfide lubricating layer reduces the frictional loss at high temperatures. The second rotating rod 610 realizes a 90° steering transmission through the second bevel gear 609 and the first bevel gear 607 of the first rotating rod 605, transmitting the rotational motion to the vertical direction. This transmission system is supported by bearings with high-temperature lubricating grease resistant to 300°C to ensure stable operation under thermal expansion conditions; 3. Mechanical - electromagnetic conversion stage: The cam column 504 at the top of the first rotating rod 605 rotates at a speed of f = ω / 2π. The involute-shaped cam groove 503 opened on its surface pushes the driven rod 502 to perform a simple harmonic motion. The connecting block 508 drives the mating needle 501 to vibrate vertically according to the law of Δh = Asin(2πft) (A is the amplitude). This needle cuts the magnetic induction lines in the annular magnetic field of the magnetic ring 301 and generates an induced electromotive force E = -N(dΦ / dt) according to Faraday's law, forming a pulse signal proportional to the vibration frequency f; 4. Signal Processing and Measurement Stage: The pulse signal generated by the magnetic ring 301 is transmitted to the meter 1 through the signal line 303. The built-in adaptive calibration module in the meter dynamically adjusts the flow calculation formula Q = K(T)·f according to the real-time temperature T fed back by the temperature sensor, where K(T) = K0[1 + α(T - T0)] is the temperature compensation coefficient, α is the material thermal expansion coefficient. The meter also monitors the circulation state of the cooling channel and automatically triggers the forced convection cooling of the heat dissipation fins when the detected temperature exceeds the threshold value. 5. Safety Protection Mechanism: The emergency stop button 4 directly cuts off the power supply of the meter through a dual-redundancy relay. The built-in wireless communication module in the meter can receive remote shutdown instructions. The aerogel thermal insulation layer in the protective shell 604 isolates the external high-temperature environment from the internal transmission mechanism, and together with the low thermal conductivity characteristics of the TPX material impeller, ensures the normal operation of the core components under the working condition of 400°C. This device realizes non-contact measurement through three-stage energy conversion (fluid kinetic energy to mechanical energy to electromagnetic signal). The optimized design of its U-shaped flow guide frame and cam groove enables the flow measurement range to reach 1:50, and the accuracy level can reach 0.5 level. The synergistic effect of the heat dissipation system and the temperature compensation algorithm enables it to maintain a measurement error of ±0.8% in the environmental temperature range of -50°C to 300°C.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A high-temperature resistant flowmeter, characterized in that: It includes a meter (1), and hollow steels (2) are fixedly connected to both the left and right sides of the front surface of the meter (1). A conversion component (5) is provided at the bottom of the hollow steel (2). An induction component (3) is fixedly provided on the front surface of the meter (1), and an emergency stop button (4) is fixedly provided on the front side of the meter (1); The conversion component (5) includes a first support plate (505). A fluid force component (6) is provided at the bottom of the first support plate (505), and the top of the first support plate (505) is fixedly connected to the bottom of the hollow steel (2); The fluid force component (6) includes a protective shell (604). An outer connecting pipe (602) is fixedly connected to the bottom of the protective shell (604), and a first rotating rod (605) is rotatably connected to the inner wall of the outer connecting pipe (602); The induction component (3) includes a fixed hinge (302), and the back surface of the fixed hinge (302) is fixedly connected to the front surface of the meter (1).

2. The high-temperature resistant flowmeter according to claim 1, wherein: A fixed frame (507) is fixedly connected to the back surface of the first support plate (505). A sliding rod (506) is slidably connected to the inner wall of the fixed frame (507). A connecting block (508) is fixedly connected to the top of the sliding rod (506). A driven rod (502) is fixedly connected to the front end of the connecting block (508). A cam column (504) is fixedly connected to the top of the first rotating rod (605). A cam groove (503) is formed on the surface of the cam column (504), and the groove wall of the cam groove (503) abuts against the surface of the driven rod (502). A signal wire (303) is fixedly connected to the inner wall of the fixed hinge (302). A magnetic ring (301) is fixedly connected to the front end of the signal wire (303). A mating pin (501) is fixedly connected to the top of the connecting block (508), and the mating pin (501) is located at the bottom of the magnetic ring (301). The output end of the meter (1) is electrically connected to the receiving end of the signal wire (303).

3. The high-temperature resistant flowmeter according to claim 2, characterized in that: The material of the first rotating rod (605) is stainless steel material, and the first rotating rod (605) is resistant to weak corrosive media such as air, steam, and water.

4. The high-temperature resistant flowmeter according to claim 3, characterized in that: The material of the magnetic ring (301) is an inductance coil, and the magnetic ring (301) is a device that works based on the principle of electromagnetic induction.

5. The high-temperature resistant flowmeter according to claim 1, wherein: A first bevel gear (607) is fixedly connected to the bottom of the first rotating rod (605). Sealing plates (603) are fixedly connected to both the left and right sides of the inner wall of the outer connecting pipe (602). An inner flowing water box (601) is fixedly connected to the inner wall of the sealing plate (603). A second rotating rod (610) is rotatably connected to the inner wall of the inner flowing water box (601). A third rotating rod (611) is rotatably connected to the inner wall of the inner flowing water box (601). An impeller (612) is fixedly connected to the middle of the surface of the third rotating rod (611). U-shaped flow guiding frames (613) are fixedly connected to each blade of the impeller (612).

6. The high-temperature resistant flowmeter according to claim 5, characterized in that: The front side of the surface of the second rotating rod (610) is fixedly connected to a driven gear (608), the rear side of the surface of the third rotating rod (611) is fixedly connected to a driving gear (606), the surface of the driving gear (606) is meshed with the surface of the driven gear (608), the rear end of the second rotating rod (610) is fixedly connected to a second bevel gear (609), the first bevel gear (607) is meshed with the second bevel gear (609), the tooth surfaces of the driving gear (606) and the driven gear (608) are coated with a molybdenum disulfide solid lubricating layer, and the bearing seats of the second rotating rod (610) and the third rotating rod (611) are filled with high-temperature resistant grease, which has a temperature resistance range of -50°C to 300°C.

7. The high-temperature resistant flowmeter according to claim 6, wherein: [[ID=*1]] The material of the impeller (612) is TPX material, and the surface of the impeller (612) is sprayed with an anti-corrosion coating.

8. The high-temperature resistant flowmeter according to claim 1, wherein: The inner wall of the protective shell (604) is embedded with a heat insulation layer, the heat insulation layer is made of an aerogel composite material, and the outer surface of the protective shell (604) is provided with heat dissipation fins, the heat dissipation fins are distributed along the axial direction and are parallel to the fluid flow direction of the external connecting pipe (602); The inner cavity of the inner flow box (601) is provided with a temperature sensor, and the temperature sensor is electrically connected to the input end of the meter (1). The meter (1) is equipped with an adaptive calibration module for dynamically correcting flow calculation parameters according to the temperature signal. A cooling channel is provided inside the hollow steel (2), and the inlet and outlet of the cooling channel extend to the side wall of the meter (1) and are connected to the external circulation cooling system.

9. The high-temperature resistant flowmeter according to claim 7, characterized in that: The anti-corrosion coating is a polytetrafluoroethylene coating, the blade edges of the impeller (612) are provided with a silicon carbide wear-resistant layer, and the flow-facing surface of the U-shaped guide frame (613) is a streamlined curved surface, the radius of curvature of which is inversely proportional to the fluid flow rate.

10. A high-temperature resistant flowmeter according to claim 1, characterized in that: The emergency stop button (4) is integrated with a wireless communication module, which supports remote emergency shutdown command reception. A dual redundant relay is connected in series in the power supply circuit of the meter (1), and the trigger end of the relay is electrically connected to the output end of the emergency stop button (4).

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