CN120403787A - A high temperature resistant flow meter - Google Patents
A high temperature resistant flow meterInfo
- Publication number
- CN120403787A CN120403787A CN202510642707.0A CN202510642707A CN120403787A CN 120403787 A CN120403787 A CN 120403787A CN 202510642707 A CN202510642707 A CN 202510642707A CN 120403787 A CN120403787 A CN 120403787A
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- China
- Prior art keywords
- fixedly connected
- meter
- rotating rod
- flow
- wall
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/006—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus characterised by the use of a particular material, e.g. anti-corrosive material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/02—Compensating or correcting for variations in pressure, density or temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/14—Casings, e.g. of special material
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
本发明涉及流量测量技术领域，具体为一种抗高温流量计，包括计量器，所述计量器正表面的左右两侧均固定连接有空心钢，所述空心钢的底部设有转化部件，所述计量器的正表面固定设有感应部件，所述计量器的前侧固定设有急停按钮，所述转化部件包括有第一支撑板，所述第一支撑板的底部设有流力部件，所述第一支撑板的顶部与空心钢的底部固定连接；本发明中，该装置通过三级能量转换（流体动能至机械能至电磁信号）实现非接触式测量，其U型导流架与凸轮槽的优化设计使流量测量范围达到1:50，精度等级可达0.5级，散热系统与温度补偿算法的协同作用，使其在‑50℃至300℃环境温度范围内保持±0.8%的测量误差。
The present invention relates to the field of flow measurement technology, and specifically to a high-temperature resistant flow meter, comprising a meter, wherein the left and right sides of the front surface of the meter are fixedly connected with hollow steel, the bottom of the hollow steel is provided with a conversion component, the front surface of the meter is fixedly provided with an induction component, the front side of the meter is fixedly provided with an emergency stop button, the conversion component comprises a first support plate, the bottom of the first support plate is provided with a fluid component, and the top of the first support plate is fixedly connected to the bottom of the hollow steel; in the present invention, the 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 guide frame and cam groove enables the flow measurement range to reach 1:50, and the accuracy level can reach level 0.5, and 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 ambient temperature range of -50°C to 300°C.
Description
Technical Field
The invention relates to the technical field of flow measurement, in particular to a high-temperature-resistant flowmeter.
Background
As a core link of industrial process control, the accuracy and reliability of the flow measurement directly affect the operation efficiency of a production system, and in high-temperature industrial scenes such as petrochemical industry, metallurgy smelting and the like, a conventional flowmeter faces multiple technical bottlenecks:
the thermal stability defect is that under the high-temperature working condition of more than 400 ℃, the difference of thermal expansion coefficients of materials of a metal transmission part of the traditional mechanical flowmeter causes the clearance change of a kinematic pair, and the mechanical clamping phenomenon is caused, for example, the torque loss of a gear transmission system is increased by 40% when the temperature gradient delta T=200 ℃, so that the measurement precision is seriously restricted;
the electronic component is thermally damaged, namely the contact sensor is easy to cause thermal drift of a signal conditioning circuit under the conduction of a high-temperature medium, and the zero drift rate of a resistance strain gauge is typically more than 0.05%/DEGC;
The dynamic response is deteriorated, namely when the temperature of fluid of the existing turbine flowmeter is suddenly changed, the elastic modulus of impeller material is reduced to cause the resonance frequency to deviate, and when the flow rate is more than 30m/s, the vibration amplitude breaks through the D-level limit value of ISO 10816-3 standard, so that the early failure of the bearing is caused;
the corrosion resistance is insufficient, the corrosion rate of a common carbon steel impeller can reach 0.12 mm/year under the environment of high-temperature sulfur-containing medium, and the impeller sprayed with the hard alloy coating is easy to generate coating peeling due to interface thermal stress.
Disclosure of Invention
Accordingly, the present invention provides a high temperature resistant flowmeter to solve the above-mentioned problems.
The invention provides a high-temperature-resistant flowmeter, which comprises a meter, wherein the left side and the right side of the front surface of the meter are fixedly connected with hollow steel, the bottom of the hollow steel is provided with a conversion part, the front surface of the meter is fixedly provided with an induction part, and the front side of the meter is fixedly provided with an emergency stop button;
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;
The flow force component comprises a protective shell, wherein an outer connecting pipe is fixedly connected to the bottom of the protective shell, and a first rotating rod is rotatably connected to the inner wall of the outer connecting pipe;
The sensing part comprises a fixed hinge, and the back surface of the fixed hinge is fixedly connected with the front surface of the gauge.
As a preferable scheme of the invention, the back surface of the first supporting plate is fixedly connected with a fixed frame, the inner wall of the fixed frame is connected with a sliding rod in a sliding manner, the top of the sliding rod is fixedly connected with a connecting block, the front end of the connecting block is fixedly connected with a driven rod, the top of the first rotating rod is fixedly connected with a cam post, the surface of the cam post is provided with a cam groove, the groove wall of the cam groove is abutted against the surface of the driven rod, the inner wall of the fixed hinge is fixedly connected with a signal wire, the front end of the signal wire is fixedly connected with a magnetic ring, the top of the connecting block is fixedly connected with a matching needle, the matching needle is positioned at the bottom of the magnetic ring, and the output end of the meter is electrically connected with the receiving end of the signal wire.
As a preferable scheme of the 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, water and the like.
As a preferable scheme of the invention, the material of the magnetic ring is an inductance coil, and the magnetic ring is a device which works by utilizing the principle of electromagnetic induction.
As a preferable scheme of the invention, the bottom of the first rotating rod is fixedly connected with a first bevel gear, the left side and the right side of the inner wall of the outer connecting pipe are fixedly connected with sealing plates, the inner wall of each sealing plate is fixedly connected with an inner water flowing box, the inner wall of each inner water flowing box is rotationally connected with a second rotating rod, the inner wall of each inner water flowing box is rotationally connected with a third rotating rod, the middle part of the surface of each third rotating rod is fixedly connected with an impeller, and each blade of each impeller is fixedly connected with a U-shaped flow guiding frame.
As a preferable scheme of the invention, the front side of the surface of the second rotating rod is fixedly connected with a driven gear, the rear side of the surface of the third rotating rod is fixedly connected with a driving gear, the surface of the driving gear is meshed with the surface of the driven gear, the rear end of the second rotating rod is fixedly connected with a second bevel gear, the first bevel gear is meshed with the second bevel gear, the tooth surfaces of the driving gear and the driven gear are coated with a molybdenum disulfide solid lubricating layer, and bearing seats of the second rotating rod and the third rotating rod are filled with high-temperature-resistant lubricating grease, wherein the temperature tolerance range is-50 ℃ to 300 ℃.
As a preferable scheme of the invention, the impeller is made of TPX material, and the surface of the impeller is sprayed with an anti-corrosion coating.
As a preferable scheme of the invention, the inner wall of the protective shell is embedded with a heat insulation layer, the heat insulation layer is made of aerogel composite material, the outer surface of the protective shell is provided with heat radiation fins, and the heat radiation fins are distributed along the axial direction and are parallel to the fluid flow direction of the outer connecting pipe;
The inner cavity of the inner water flow box is provided with a temperature sensor, the temperature sensor is electrically connected with the input end of the meter, the meter is internally provided with a self-adaptive calibration module for dynamically correcting flow calculation parameters according to temperature signals, the hollow steel is internally provided with a cooling flow passage, and the inlet and the outlet of the cooling flow passage extend to the side wall of the meter and are communicated with an external circulating cooling system.
As a preferable scheme of the 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 flow guide frame is a flow linear curved surface, and the curvature radius of the U-shaped flow guide frame is in inverse proportion relation with the flow velocity of the fluid.
As a preferable scheme of the invention, the emergency stop button is integrated with a wireless communication module, the wireless communication module supports the receiving of a remote emergency shutdown instruction, a double redundancy relay is connected in series in a power supply loop of the meter, and a trigger end of the relay is electrically connected with an output end of the emergency stop button.
Compared with the prior art, the invention has the beneficial effects that:
According to the invention, after fluid enters an outer connecting pipe, the impeller is impacted in an inner flow box, a U-shaped flow guide frame on an impeller blade automatically adjusts the curvature of a flow-facing surface according to the fluid speed (the higher the flow speed is, the smaller the curvature radius is), the fluid kinetic energy is efficiently converted into rotary mechanical energy, the impeller drives a third rotating rod to rotate at the angular speed of omega=Kv2 (K is a structural coefficient, v is the flow speed), and a polytetrafluoroethylene coating and a silicon carbide wear-resistant layer sprayed on the surface of the third rotating rod ensure the durability in a high-temperature corrosive medium; the driving gear at the tail end of the third rotating rod and the driven gear on the second rotating rod form 1:3 speed increasing ratio meshing transmission, the molybdenum disulfide lubricating layer reduces friction loss at high temperature, the second rotating rod realizes 90-degree steering transmission with the first bevel gear of the first rotating rod through the second bevel gear, rotary motion is transmitted to the vertical direction, the transmission system adopts a bearing support resistant to 300 ℃ high-temperature lubricating grease to ensure stable operation under the thermal expansion condition, a cam column at the top of the first rotating rod rotates at the rotating speed of f=omega/2 pi, an involute cam groove formed on the surface pushes the driven rod to make simple harmonic motion, a connecting block drives a matched needle to vibrate vertically (A is amplitude) at the law of Δh=asin (2 pi ft), the needle body cuts magnetic induction lines in an annular magnetic field of the magnetic ring, induced electromotive force E= -N (dphi/dt) is generated according to Faraday law, a pulse signal proportional to the vibration frequency f is formed, the pulse signal generated by the magnetic ring is transmitted to a meter through a signal wire, a self-adaptive calibration module arranged in the meter is used for feeding back real-time temperature T according to a temperature sensor, the flow calculation formula Q=K (T). F is dynamically adjusted, wherein K (T) =K0 [ 1+alpha (T-T0) ] is a temperature compensation coefficient, alpha is a material thermal expansion coefficient, the meter monitors the circulation state of a cooling flow channel at the same time, forced convection cooling of a cooling fin is automatically triggered when the temperature is detected to exceed a threshold value, an emergency stop button directly cuts off a power supply of the meter through a double redundancy relay, a built-in wireless communication module of the meter can receive a remote turn-off instruction, an aerogel heat insulation layer in a protective shell isolates an external high-temperature environment from an internal transmission mechanism, the low heat conductivity characteristic of a TPX material impeller is matched, normal operation of a core component is ensured under the working condition of 400 ℃, the device realizes non-contact measurement through three-stage energy conversion (fluid kinetic energy to mechanical energy to electromagnetic signals), the optimal design of a U-shaped guide frame and a cam groove enables the flow measurement range to reach 1:50, the precision level can reach 0.5 level, and the heat dissipation system and the temperature compensation algorithm keep a measurement error of +/-0.8% within the environment temperature range of-50 ℃ to 300 ℃.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a partial cross-sectional view of the structure of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of the partial structure of FIG. 2 according to the present invention;
fig. 4 is an enlarged view of a part of the structure of fig. 1 according to the present invention.
In the figure, 1, a counter, 2, hollow steel, 3, a sensing part, 4, an emergency stop button, 5, a conversion part, 6, a force flowing part, 301, a magnetic ring, 302, a fixed hinge, 303, a signal wire, 501, a matching needle, 502, a driven rod, 503, a cam groove, 504, a cam post, 505, a first supporting plate, 506, a sliding rod, 507, a fixed frame, 508, a connecting block, 601, an inner water box, 602, an outer connecting pipe, 603, a sealing plate, 604, a protective shell, 605, a first rotating rod, 606, a driving gear, 607, a first bevel gear, 608, a driven gear, 609, a second bevel gear, 610, a second rotating rod, 611, a third rotating rod, 612, an impeller, 613 and a U-shaped guide frame.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to fig. 4, the technical solution provided by the present invention specifically includes the following embodiments:
The embodiment of the high-temperature-resistant flowmeter comprises a meter 1, wherein the left side and the right side of the front surface of the meter 1 are fixedly connected with hollow steel 2, the bottom of the hollow steel 2 is provided with a conversion part 5, the front surface of the meter 1 is fixedly provided with an induction part 3, and the front side of the meter 1 is fixedly provided with an emergency stop button 4;
The conversion part 5 comprises a first supporting plate 505, a flow force part 6 is arranged at the bottom of the first supporting plate 505, and the top of the first supporting plate 505 is fixedly connected with the bottom of the hollow steel 2;
The flow force component 6 comprises a protective shell 604, wherein the bottom of the protective shell 604 is fixedly connected with an outer connecting pipe 602, and the inner wall of the outer connecting pipe 602 is rotatably connected with a first rotating rod 605;
the sensing part 3 comprises a fixed hinge 302, and the back surface of the fixed hinge 302 is fixedly connected with the front surface of the meter 1;
The symmetrical distribution of mechanical load is realized through the double-side supporting structure of the hollow steel 2, so that the vibration resistance of the equipment reaches the C level (the vibration speed is less than or equal to 4.5 mm/s) of the ISO 10816-3 standard, the separation type layout of the conversion part 5 and the flow part 6 is matched with the internal cooling flow passage (the flow speed is more than or equal to 2 m/s) of the hollow steel, the heat conduction rate of a high-temperature medium is reduced to 15W/m < 2 >. K, and the electronic element of the meter is effectively protected;
the back surface of the first supporting plate 505 is fixedly connected with a fixed frame 507, the inner wall of the fixed frame 507 is connected with a sliding rod 506 in a sliding manner, 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 post 504, the surface of the cam post 504 is provided with a cam groove 503, the groove wall of the cam groove 503 is propped against the surface of the driven rod 502, the inner wall of the fixed hinge 302 is fixedly connected with a signal wire 303, the front end of the signal wire 303 is fixedly connected with a magnetic ring 301, the top of the connecting block 508 is fixedly connected with a matching needle 501, the matching needle 501 is positioned at the bottom of the magnetic ring 301, and the output end of the meter 1 is electrically connected with the receiving end of the signal wire 303;
The involute profile of the cam groove 503 enables the displacement error of the driven rod 502 to be less than or equal to +/-0.05 mm, the mechanical energy-displacement conversion efficiency to be more than or equal to 92% is realized by matching with the linear bearing guide of the sliding rod 506 (friction coefficient mu=0.002), the fixed connection design of the connecting block 508 and the matching needle 501 can absorb the thermal expansion deformation of +/-1.2 mm, the movement clamping stagnation under the high temperature working condition is avoided, the fixed hinge 302 supports +/-15 DEG angle adjustment, the axial deviation of the matching needle 501 and the magnetic ring 301 is ensured to be less than or equal to 0.1mm, and the influence of installation errors on measurement is eliminated;
The first rotating rod 605 is made of stainless steel, and the first rotating rod 605 is resistant to weak corrosive media such as air, steam, water and the like.
The material of the magnetic ring 301 is an inductance coil, and the magnetic ring 301 is a device that operates by utilizing the principle of electromagnetic induction.
The bottom of the first rotating rod 605 is fixedly connected with a first bevel gear 607, the left side and the right side of the inner wall of the outer connecting pipe 602 are fixedly connected with a sealing plate 603, the inner wall of the sealing plate 603 is fixedly connected with an inner water flow box 601, the inner wall of the inner water flow box 601 is rotationally connected with a second rotating rod 610, the inner wall of the inner water flow box 601 is rotationally connected with a third rotating rod 611, the middle part of the surface of the third rotating rod 611 is fixedly connected with an impeller 612, and each blade of the impeller 612 is fixedly connected with a U-shaped guide frame 613;
The curvature radius R and the flow velocity v of the U-shaped guide frame meet R=K/v (K=0.15m2/s), so that the impeller efficiency is kept to be more than or equal to 75% within the flow velocity range of 1-50 m/s.
The front side fixedly connected with driven gear 608 on second bull stick 610 surface, the rear side fixedly connected with driving gear 606 on third bull stick 611 surface, the surface of driving gear 606 meshes with the surface of driven gear 608, the rear end fixedly connected with second bevel gear 609 of second bull stick 610, first bevel gear 607 meshes with second bevel gear 609, the flank of tooth of driving gear 606 and driven gear 608 is coated with molybdenum disulfide solid lubrication layer, the bearing frame intussusception of second bull stick 610 and third bull stick 611 has high temperature resistant lubricating grease, its tolerance temperature range is-50 ℃ to 300 ℃.
The impeller 612 is made of TPX material, and the surface of the impeller 612 is sprayed with an anti-corrosion coating.
The inner wall of the protective shell 604 is embedded with a heat insulation layer, the heat insulation layer is made of aerogel composite material, the outer surface of the protective shell 604 is provided with heat radiation fins, and the heat radiation fins are distributed along the axial direction and are parallel to the fluid flow direction of the outer connecting pipe 602;
The inner cavity of the inner water flowing box 601 is provided with a temperature sensor, the temperature sensor is electrically connected with the input end of the meter 1, the meter 1 is internally provided with a self-adaptive calibration module for dynamically correcting flow calculation parameters according to temperature signals, the inside of the hollow steel 2 is provided with a cooling flow passage, and the inlet and the outlet of the cooling flow passage extend to the side wall of the meter 1 and are communicated with an external circulating cooling system;
The anticorrosive coating is a polytetrafluoroethylene coating, the edges of the blades of the impeller 612 are provided with silicon carbide wear-resistant layers, the flow-facing surface of the U-shaped flow guide frame 613 is a flow linear curved surface, and the curvature radius of the flow-guiding frame is in inverse proportion to the flow velocity of the fluid;
the abrasion rate of the blade edge in a solid particle-containing medium is less than or equal to 0.01 mm/kilohour by the silicon carbide abrasion-resistant layer (the hardness is more than or equal to 2800 HV), and the service life of the blade edge is prolonged by 8 times compared with that of a common steel impeller.
The emergency stop button 4 is integrated with a wireless communication module, the wireless communication module supports the receiving of a remote emergency shutdown instruction, a double-redundancy relay is connected in series in a power circuit of the meter 1, and a trigger end of the relay is electrically connected with an 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 self-adaptive calibration module dynamically adjusts the flow calculation formula Q=K (T) f according to the real-time temperature T fed back by the temperature sensor, wherein K (T) =K0 [ 1+alpha (T-T0) ] is a temperature compensation coefficient, alpha is a material thermal expansion coefficient, the meter monitors the circulation state of the cooling flow channel at the same time, when the temperature is detected to exceed a threshold value, the forced convection cooling of the cooling fins is automatically triggered, the power supply of the meter is directly cut off by the emergency stop button 4 through the double-redundancy relay, the built-in wireless communication module can receive a remote turn-off instruction, the aerogel heat insulation layer in the protective shell 604 isolates the external high-temperature environment from the internal transmission mechanism, and the low-heat conductivity characteristic of the TPX material impeller is matched, so that the normal operation of the core component under the working condition of 400 ℃ is ensured.
In the invention, the working principle of the high temperature resistant flowmeter is based on a multi-stage conversion mechanism of hydrodynamic-mechanical energy-electromagnetic induction, and the specific working flow is as follows:
1. In the fluid power collection stage, after fluid enters an outer connecting pipe 602, an impeller 612 is impacted in an inner flow box 601, a U-shaped guide frame 613 on an impeller blade automatically adjusts the curvature of a flow-facing surface according to the fluid speed (the higher the flow speed is, the smaller the curvature radius is), the fluid kinetic energy is efficiently converted into rotary mechanical energy, the impeller 612 drives a third rotating rod 611 to rotate at the angular speed of omega=Kv2 (K is a structural coefficient, v is the flow speed), and a polytetrafluoroethylene coating and a silicon carbide wear-resistant layer sprayed on the surface of the third rotating rod 611 ensure the durability in a high-temperature corrosive medium;
2. The mechanical transmission amplifying stage is that a driving gear 606 at the tail end of a third rotating rod 611 and a driven gear 608 on a second rotating rod 610 form 1:3 speed increasing ratio meshing transmission, a molybdenum disulfide lubricating layer reduces friction loss at high temperature, the second rotating rod 610 and a first bevel gear 607 of a first rotating rod 605 realize 90-degree steering transmission through a second bevel gear 609, and rotary motion is transmitted to the vertical direction, and the transmission system adopts a bearing support of 300 ℃ high-temperature resistant lubricating grease to ensure stable operation under the condition of thermal expansion;
3. the mechanical-electromagnetic conversion stage comprises the steps that a cam column 504 at the top of a first rotating rod 605 rotates at the rotating speed of f=omega/2 pi, an involute cam groove 503 formed in the surface of the cam column pushes a driven rod 502 to make simple harmonic motion, a connecting block 508 drives a matching needle 501 to vibrate vertically (A is amplitude) in a law of delta h=Asin (2 pi ft), the needle body cuts a magnetic induction line in an annular magnetic field of a magnetic ring 301, induced electromotive force E= -N (dphi/dt) is generated according to Faraday law, and a pulse signal proportional to vibration frequency f is formed;
4. the pulse signal generated by the magnetic ring 301 is transmitted to the meter 1 through the signal line 303, the built-in self-adaptive calibration module dynamically adjusts the flow calculation formula Q=K (T) f according to the real-time temperature T fed back by the temperature sensor, wherein K (T) =K0 [ 1+alpha (T-T0) ] is a temperature compensation coefficient, alpha is a material thermal expansion coefficient, the meter monitors the circulation state of the cooling flow channel at the same time, and when the temperature is detected to exceed a threshold value, the forced convection cooling of the cooling fin is automatically triggered;
5. The emergency stop button 4 directly cuts off the power supply of the meter through the double redundant relays, the built-in wireless communication module can receive a remote turn-off instruction, the aerogel heat insulation layer in the protective shell 604 isolates the external high-temperature environment from the internal transmission mechanism, and the low heat conductivity characteristic of the TPX material impeller is matched, so that the normal work of the core component under the working condition of 400 ℃ is ensured;
The device realizes non-contact measurement through three-stage energy conversion (from fluid kinetic energy to mechanical energy to electromagnetic signals), the optimal design of the U-shaped guide frame and the cam groove enables the flow measurement range to reach 1:50, the precision grade to reach 0.5 grade, and the heat dissipation system and the temperature compensation algorithm cooperate to enable the heat dissipation system to keep a measurement error of +/-0.8% in an environment temperature range of-50 ℃ to 300 ℃.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made hereto without departing from the spirit and principles of the present invention.
Claims (10)
1. The high-temperature-resistant flowmeter is characterized by comprising a meter (1), wherein the left side and the right side of the front surface of the meter (1) are fixedly connected with hollow steel (2), the bottom of the hollow steel (2) is provided with a conversion part (5), the front surface of the meter (1) is fixedly provided with an induction part (3), and the front side of the meter (1) is fixedly provided with a scram button (4);
the conversion part (5) comprises a first supporting plate (505), a flow force part (6) is arranged at the bottom of the first supporting plate (505), and the top of the first supporting plate (505) is fixedly connected with the bottom of the hollow steel (2);
The flow force component (6) comprises a protective shell (604), wherein 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 sensing part (3) comprises a fixed hinge (302), and the back surface of the fixed hinge (302) is fixedly connected with the front surface of the meter (1).
2. The high temperature resistant flowmeter of claim 1, wherein the back surface of the first supporting plate (505) is fixedly connected with a fixed frame (507), the inner wall of the fixed frame (507) is connected with a sliding rod (506) in a sliding mode, 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 post (504), the surface of the cam post (504) is provided with a cam groove (503), the groove wall of the cam groove (503) abuts against the surface of the driven rod (502), the inner wall of the fixed hinge (302) is fixedly connected with a signal wire (303), the front end of the signal wire (303) is fixedly connected with a magnetic ring (301), the top of the connecting block (508) is fixedly connected with a matching needle (501), the matching needle (501) is located at the bottom of the magnetic ring (301), and the output end of the flowmeter (1) is electrically connected with the receiving end of the signal wire (303).
3. The high temperature resistant flowmeter of claim 2, wherein the first rotating rod (605) is made of stainless steel, and the first rotating rod (605) is resistant to weak corrosive media such as air, steam and water.
4. A high temperature resistant flowmeter according to claim 3, wherein said magnetic ring (301) is made of an inductive coil, and said magnetic ring (301) is a device operating on the principle of electromagnetic induction.
5. The high temperature resistant flowmeter of claim 1, wherein the bottom of the first rotating rod (605) is fixedly connected with a first bevel gear (607), the left side and the right side of the inner wall of the outer connecting pipe (602) are fixedly connected with sealing plates (603), the inner wall of the sealing plates (603) is fixedly connected with an inner water box (601), the inner wall of the inner water box (601) is rotationally connected with a second rotating rod (610), the inner wall of the inner water box (601) is rotationally connected with a third rotating rod (611), the middle part of the surface of the third rotating rod (611) is fixedly connected with an impeller (612), and each blade of the impeller (612) is fixedly connected with a U-shaped guide frame (613).
6. The high temperature resistant flowmeter of claim 5, wherein the front side of the surface of the second rotating rod (610) is fixedly connected with a driven gear (608), the rear side of the surface of the third rotating rod (611) is fixedly connected with 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 with 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 molybdenum disulfide solid lubricating layers, and bearing seats of the second rotating rod (610) and the third rotating rod (611) are filled with high temperature resistant lubricating grease, wherein the temperature resistant range is-50 ℃ to 300 ℃.
7. The flowmeter of claim 6, wherein the impeller (612) is made of TPX material, and the surface of the impeller (612) is coated with an anti-corrosion coating.
8. The flowmeter of claim 1, wherein the inner wall of the protective shell (604) is embedded with a heat insulating layer, the heat insulating layer is made of aerogel composite material, and heat dissipation fins are arranged on the outer surface of the protective shell (604), distributed along the axial direction and parallel to the fluid flow direction of the outer connecting pipe (602);
the inner cavity of the inner water flow box (601) is provided with a temperature sensor, the temperature sensor is electrically connected with the input end of the meter (1), the meter (1) is internally provided with a self-adaptive calibration module for dynamically correcting flow calculation parameters according to temperature signals, the inside of the hollow steel (2) is provided with a cooling flow passage, and the inlet and the outlet of the cooling flow passage extend to the side wall of the meter (1) and are communicated with an external circulating cooling system.
9. The high temperature resistant flowmeter of claim 7, wherein the corrosion resistant coating is a polytetrafluoroethylene coating, a silicon carbide abrasion resistant layer is arranged at the edge of the blade of the impeller (612), and the flow-facing surface of the U-shaped flow guide frame (613) is a flow linear curved surface, and the curvature radius of the flow-facing surface is in inverse proportion to the flow velocity of the fluid.
10. The high-temperature resistant flowmeter of claim 1, wherein the emergency stop button (4) is integrated with a wireless communication module, the wireless communication module supports the reception of a remote emergency shutdown instruction, a double-redundancy relay is connected in series in a power circuit of the meter (1), and a trigger end of the relay is electrically connected with an output end of the emergency stop button (4).
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