A twin dual-probe vortex flowmeter with electrical and steam coil tracing

Abstract

The present application belongs to the technical field of vortex flowmeter, and particularly relates to a vortex flowmeter with twin double-probe and electric heat tracing and steam coil heat tracing, which comprises a pipe body, first and second flanges fixedly connected to two ends of the pipe body respectively, a vortex generator arranged in the inner cavity of the pipe body, micro grooves on both sides of the vortex generator, a steam coil and an armored electric heating cable assembled on the side wall of the pipe body, a cover fixedly connected to the outer side of the pipe body between the first and second flanges, first and second connectors fixedly connected to the side wall of the cover, the steam coil connected to the first and second connectors at two ends respectively, a wire outlet arranged on the side wall of the cover, one end of the armored electric heating cable penetrating through the wire outlet, and two probe assemblies arranged on the side wall of the pipe body. The present application can realize uniform heating and high safety by means of the steam coil and the armored electric heating cable, and can improve the flow calculation precision by means of the probe assemblies.

Description

Technical Field

[0001] This invention belongs to the field of vortex flow meter technology, specifically relating to a vortex flow meter with twin probes that are equipped with both electric heat tracing and steam coil heat tracing. Background Technology

[0002] The working principle of a vortex flow meter is based on the "Kármán vortex street" phenomenon in fluid mechanics. When a fluid (liquid, gas, or steam) flows through a non-streamlined obstruction (called a "generator"), regular double rows of linear vortices rotating in opposite directions are alternately generated on both sides of the generator. This regular array of vortices is called a Karman vortex street.

[0003] The technical solutions for conventional vortex flow meters on the market are highly mature. Their core is based on the Karman vortex street principle, using optimized design and digital processing to ensure measurement stability and reliability. The core mechanical design employs a trapezoidal vortex generator and a piezoelectric sensor. The trapezoidal vortex generator, due to its ability to provide a fixed flow separation point and a stable Strouhal number, has become the dominant technology, effectively widening the flow range. The sensor generally uses a built-in piezoelectric crystal to directly detect the alternating stress generated by the alternating shedding of vortices.

[0004] In the traditional petrochemical industry, many gas-liquid flows are prone to crystallization. During the transport of these media, the temperature gradually decreases as the pipeline extends, especially if insulation is inadequate. This can lead to crystallization or polymer buildup at the generator and sensor of the vortex flowmeter. For example, when steam encounters a cooler triangular prism generator during transport, it is more likely to produce a large amount of condensate, which, when applied to the sensor, causes significant measurement fluctuations and errors. Traditionally, a heat-insulating jacket has been fitted to the outer surface of the vortex flowmeter, through which steam is introduced for heat tracing. However, this method is prone to leakage, and steam jacket heating cannot control the steam flow within the jacket, resulting in uneven heating. The temperature difference before and after the heat tracing can be 50-60 degrees Celsius, and the temperature difference between the generator and the inner wall of the vortex flowmeter can be over 100 degrees Celsius. Furthermore, some remote flowmeter installation sites lack steam access, making steam jackets alone unsafe, unstable, and sometimes unable to obtain steam at all.

[0005] Vortex flow meters need to be installed on pipelines, and pipelines have their own vibration sources, such as pumps, compressors, fans, high-speed fluid (especially gas / steam) flow, valve throttling, water hammer effect, proximity to highways, railways, or other large vibrating equipment. These will all transmit vibrations to the internal sensor of the vortex flow meter. The actual Karman vortex street signal causes the electrical signal generated by the sensor to be superimposed with the interference signal transmitted to the sensor by the pipeline vibration, resulting in chaotic measurement values ​​and even causing the flow meter to malfunction.

[0006] Secondly, current petrochemical plants are trending towards miniaturization and integration. Many pipeline designs do not retain sufficient upstream and downstream straight pipe sections. Vortex flow meters require a stable, symmetrical, and fully developed velocity distribution to generate accurate and stable vortex streets. Elbows and valves in the pipeline can cause the fluid medium to surge towards the vortex generator like a whirlwind, creating strong turbulence and disrupting vortex street formation, leading to malfunction of the vortex flow meter. In some existing operating conditions, specific circular orifice rectifiers are installed. However, these rectifiers only perform rectification. For vortex street formation, besides turbulence, the fluid needs to flow evenly on both sides of the generator; that is, the fluid on both sides should be average for optimal effect. Conventional circular orifice rectifiers only focus on rectification, neglecting the requirement of lateral averaging. Furthermore, the circular orifices of these rectifiers are mostly formed by stacking thin-walled steel pipes. The sharp angles formed by the adjacent seams of the stacked pipes can easily clog these areas with impurities and rust flowing in from the fluid, further compromising the averaging effect after rectification.

[0007] In addition, the vortex generator inside a traditional vortex flowmeter is a smooth, one-piece structure. There are no vortex vortices generated on both sides when fluid flows through the vortex generator. Due to the influence of temperature, damping, flow velocity, Reynolds number, etc., there will be a deviation in the separation position when the two sides of the generator separate, which will cause the subsequent sensing probe to fail to capture the vortex frequency well. Summary of the Invention

[0008] The purpose of this invention is to provide a vortex flow meter with twin probes for both electric heat tracing and steam coil heat tracing, which enables the steam coil and armored electric heating cable to achieve uniform heating and high safety, and improves the accuracy of flow calculation by utilizing the probe assembly.

[0009] The specific technical solution adopted by this invention is as follows: A vortex flow meter with twin probes for electric heat tracing and steam coil heat tracing includes a tube body, with a first flange and a second flange fixedly connected to both ends of the tube body, a vortex generator disposed in the inner cavity of the tube body, and a steam coil and armored electric heating cable assembled on the side wall of the tube body. A cover is fixedly connected to the outside of the pipe body between the first flange and the second flange. A first connector and a second connector are fixedly connected to the side wall of the cover. The two ends of the steam coil are respectively connected to the first connector and the second connector. An outlet is provided on the side wall of the cover. One end of the armored electric heating cable passes through the outlet. The tube body is provided with a probe assembly on its side wall, the cover is fixedly connected to a support column, the top of the support column is equipped with a transmitter meter, and the inner wall of the tube body is provided with a rectifier assembly near the left end.

[0010] Furthermore, the sidewall of the vortex generator is provided with several micro-grooves, and the end face of the vortex generator is provided with a coil through hole and an electric heating through hole, and the steam coil and the armored electric heating cable pass through the coil through hole and the electric heating through hole respectively.

[0011] Furthermore, the rectifier assembly includes a rectifier plate mounted on the inner wall of the tube near the end face. A fixing buckle is installed between the rectifier plate and the tube body. The side wall of the rectifier plate has a plurality of rounded square holes, which are distributed in a linear array.

[0012] Furthermore, the probe assembly includes a support fixedly connected to the side wall of the tube body, an internal mounting base is fitted inside the support, an internal vortex sensor is fitted inside the internal cavity of the internal mounting base, the probe of the internal vortex sensor extends into the internal cavity of the tube body, a first clamping nut is fitted inside the internal cavity of the internal mounting base above the internal vortex sensor, and an anti-loosening cap is fitted above the first clamping nut.

[0013] Furthermore, a sealing element is fitted at the bottom of the inner cavity of the built-in mounting base, and an O-ring is fitted on the side wall of the built-in vortex sensor, with the O-ring abutting against the inner wall of the built-in mounting base.

[0014] Furthermore, the side wall of the built-in mounting base is equipped with an external mounting base, and a fixing plate is fixedly connected to the inner wall of the external mounting base near the top. An external vortex sensor is mounted on the top of the fixing plate, and the probe of the external vortex sensor penetrates through the fixing plate. A second clamping nut is mounted on the inner wall of the external mounting base above the external vortex sensor. The built-in vortex sensor and the external vortex sensor are electrically connected to a first circuit lead and a second circuit lead, respectively, and the other end of the first circuit lead and the second circuit lead are electrically connected to the transmitter head.

[0015] Furthermore, the inner and outer walls of the support base are welded to the side wall of the pipe body, and the welding position has a first weld scar and a second weld scar. The side wall of the support base is provided with a bend, and the steam coil is adapted to the bend.

[0016] A method for assembling a vortex flow meter with twin probes and both electric and steam coil heating, the method comprising the following steps: S1: The vortex generator is processed into a triangular prism or an isosceles trapezoidal prism, and a coil through hole and an electric heating through hole are opened. Several micro grooves are opened in the vortex generator in the direction of flow. S2: Next, weld the first flange and the second flange to both ends of the pipe body, assemble the vortex generator inside the pipe body, weld the built-in mounting base to the side wall of the pipe body, then fix the built-in vortex sensor in the built-in mounting base, seal it with the sealing element and O-ring, and then screw in the first clamping nut and the anti-loosening nut in sequence to fix it. S3: Then screw the external mounting base onto the internal mounting base, then pass the first circuit lead through the reserved hole on the external mounting base, then insert the external vortex sensor into the fixing plate, and tighten the second clamping nut to fix it. S4: After the steam coil and the armored electric heating cable are wound around the outside of the tube body and passed through the coil through hole and the electric heating through hole, the two ends of the steam coil pass through the first joint and the second joint respectively, and the armored electric heating cable is connected out from the outlet. S5: Then fix the support column on the support base, and then fix the transmitter head on the top of the support column. Connect the first circuit lead and the second circuit lead to the transmitter head to complete the assembly.

[0017] The technical effects achieved by this invention are as follows: The present invention provides a twin-probe vortex flowmeter with both electric heat tracing and steam coil heat tracing. This increases the function of the steam coil and armored electric heating cable, ensuring the reliability of external heat tracing of the vortex flowmeter. The steam coil and armored electric heating cable can be implemented simultaneously, or only the steam coil or only the armored electric heating cable can be implemented. It features uniform heating and high safety.

[0018] The present invention discloses a twin-probe vortex flowmeter with both electric and steam coil heating. By setting a vortex sensor inside the pipe and an identical vortex sensor outside the pipe, the twin effect is achieved. The built-in vortex sensor detects the vortex flow rate of the fluid while also being affected by an external vibration source, while the external vortex sensor detects the flowmeter only being affected by the external vibration source. The signals from the two probes are calculated by the circuit microprocessor, and the external vibration source signal is subtracted to obtain the actual flow rate generated by the internal fluid.

[0019] This invention relates to a vortex flow meter with twin probes for both electric and steam coil heating. Through a vortex generator with microgrooves, the microgrooves enable a technological leap from passively receiving flow separation to actively controlling flow separation. Employing a sophisticated mechanical structure design, it fundamentally solves various performance bottlenecks caused by separation point drift in conventional generators. This allows the fluid to pass through a fixed separation point, resulting in a more stable and powerful vortex signal, achieving a wider range ratio, lower starting flow rate, and higher measurement accuracy. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the probe assembly of the present invention; Figure 3 This is a schematic diagram of the structure of the vortex generator of the present invention; Figure 4This is a schematic diagram of the structure of the rectifier component of the present invention; Figure 5 This is a schematic diagram of the support base of the present invention; Figure 6 This is a block diagram illustrating the circuit connection principle between the built-in vortex sensor and the external vortex sensor of this invention. Figure 7 This is a schematic diagram of the signal processing of the built-in vortex street sensor and the external vortex street sensor of the present invention.

[0021] The attached diagram lists the components represented by each number as follows: 1. Pipe body; 2. First flange; 3. Second flange; 4. Vortex generator; 401. Microgroove; 402. Coil through hole; 403. Electrothermal through hole; 404. Fixing clip; 405. Rounded square hole; 406. Rectifier plate; 6. Built-in vortex sensor; 601. Seal; 602. O-ring; 603. First clamping nut; 604. Anti-loosening cap; 605. First circuit lead; 7. Built-in mounting base; 8. External mounting base; 9. External vortex sensor; 901. Fixing plate; 902. Second clamping nut; 903. Second circuit lead; 10. Support base; 101. First weld scar; 102. Second weld scar; 103. Bend; 11. Support column; 12. Transmitter head; 13. Cover; 14. Steam coil; 15. Armored electric heating cable; 16. First connector; 17. Second connector; 18. Outlet. Detailed Implementation

[0022] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0023] Example 1: like Figures 1-7 As shown, a vortex flow meter with twin probes for both electric heat tracing and steam coil heat tracing is described. Figure 1 As shown, it includes a pipe body 1, with a first flange 2 and a second flange 3 fixedly connected to both ends of the pipe body 1, a vortex generator 4 installed in the inner cavity of the pipe body 1, and a steam coil 14 and an armored electric heating cable 15 assembled on the side wall of the pipe body 1. A cover 13 is fixedly connected to the outside of the pipe body 1 between the first flange 2 and the second flange 3. A first connector 16 and a second connector 17 are fixedly connected to the side wall of the cover 13. The two ends of the steam coil 14 are connected to the first connector 16 and the second connector 17 respectively. An outlet 18 is provided on the side wall of the cover 13. One end of the armored electric heating cable 15 passes through the outlet 18. A probe assembly is provided on the side wall of the tube body 1, and a support column 11 is fixedly connected to the side wall of the cover 13. A transmitter meter 12 is mounted on the top of the support column 11, and a rectifier assembly is provided on the inner wall of the tube body 1 near the left end.

[0024] Heat tracing of the pipe body 1 is achieved by adding a steam coil 14 and an armored electric heating cable 15. The vibration influence is increased or decreased by setting an internal vortex sensor 6 and an external vortex sensor 9 inside and outside the pipe body 1, respectively. Fluid constraint is achieved by adding a rectifier plate 406 with an integrally machined rounded square hole 405. The separation of vortex vortices from the generator body is controlled by machining microgrooves 401 on the vortex generator body.

[0025] like Figure 4 As shown, the vortex generator 4 has several micro-grooves 401 on its sidewalls, and coil through-holes 402 and electric heating through-holes 403 on its end face. The steam coil 14 and the armored electric heating cable 15 pass through the coil through-holes 402 and electric heating through-holes 403, respectively. The vortex generator 4 can be machined into a triangular prism or an isosceles trapezoidal prism. The micro-grooves 401 are oriented in the direction of the fluid. The cross-section of the micro-grooves 401 can be any shape such as V-shaped, trapezoidal, square, or semi-circular. The starting position of the micro-grooves 401 does not start from the edge of the flow-facing surface of the generator, and the tail of the micro-grooves 401 extends to the edge of the tail end of the vortex generator 4, forming a sharp opening.

[0026] The steam coil 14 for heat tracing can be made into a circular winding type or a longitudinal winding type. It can be made into a whole series type or multiple steam coils 14 in parallel, achieving a one-in-one-out configuration. The steam coil 14 can be a flexible and easily bendable steel pipe or copper pipe, or it can be made into a mesh layout of straight pipe splices. Similarly, the armored electric heating cable 15 can be arranged as a whole or in multiple sections, further enabling point-by-point control of key parts for key heating.

[0027] In addition, passing the steam coil 14 and the armored electric heating cable 15 through the coil through hole 402 and the electric heating through hole 403 facilitates the heat tracing of the vortex generator 4.

[0028] Another key aspect of this plan is: Figure 5 As shown, the rectifier assembly includes a rectifier plate 406 mounted on the inner wall of the tube body 1 near the end face. A fixing buckle 404 is mounted between the rectifier plate 406 and the tube body 1. The side wall of the rectifier plate 406 has a number of rounded square holes 405, which are distributed in a linear array.

[0029] The core principle of the rectifier is "combination of guidance and dissipation", which achieves the purpose of rectification by forcing the fluid to generate a specific form of energy dissipation; When fluid flows through the rounded square hole 405, flow separation occurs in the four rounded corner areas of each square hole, generating a series of small-scale, regularly distributed separation vortices. Since the rounded square hole 405 is symmetrical in both the left and right and up and down directions, the generation of these separation vortices is also symmetrical, which means that it will not generate a large, destructive overall vortex like a single bend, thus forcing the generation of controllable and symmetrical separation vortices.

[0030] Secondly, the main flow field defects in the pipeline from upstream bends and valves are large-scale vortices and asymmetric velocity distribution. These large-scale vortices have high energy. When these large-scale vortices pass through the rounded square hole 405 rectifier, they interact violently with the edge of the rounded square hole 405, and are cut and crushed into countless small-scale separation vortices generated at the rounded corners, thus efficiently dissipating the energy of the large-scale vortices.

[0031] According to the principles of fluid mechanics, small-scale vortices decay energy much faster than large-scale vortices. Within a very short distance after flowing through the rectifier, the kinetic energy of these small vortices is rapidly converted into heat energy and dissipated through the viscosity of the fluid.

[0032] Furthermore, the rectifier itself is a huge resistance to the fluid. The fluid must accelerate through the rounded square hole 405. This acceleration and deceleration process can smooth out the non-uniformity of the flow velocity distribution. The symmetrical opening ensures that the fluid can pass through in all directions in a consistent manner, which helps to restore the regular parabolic or flatter flow velocity distribution with high flow velocity at the center of the pipe and low flow velocity at the pipe wall. Therefore, the rectifier plate 406 with rounded square hole 405 is equivalent to a vortex crusher. It actively converts and dissipates the harmful and persistent large-scale vortices and asymmetries in the flow field into harmless and rapidly decaying small-scale vortices, thus creating a stable and symmetrical flow field behind the rectifier.

[0033] The function of the microgroove 401 is to fix the position of the separation point, making the generated vortex small and stable. When the fluid passes through the rectifier plate 406 and touches the vortex generator 4, according to the principle of the Karman vortex street, alternating vortices will be generated on both sides of the vortex generator 4. These vortices will detach and separate from both sides of the vortex generator 4. The working mechanism of the microgroove 401 processed on both sides of the vortex generator 4 is to actively control the separation position of this vortex: The point of separation under natural conditions: When fluid flows over a trapezoidal vortex generator (blunt body) surface, the flow will separate from the surface at a certain point due to the adverse pressure gradient and boundary layer; this point is called the separation point. The problem is that the separation point is not fixed under natural conditions. It shifts back and forth with changes in fluid velocity (Reynolds number Re). This shift leads to decreased stability of the vortex street, and the vortex shedding frequency becomes less pure, thus affecting the flow meter's measurement accuracy and range ratio.

[0034] The function of microgroove 401: By machining a series of tiny, parallel-to-flow-direction microgrooves 401 at specific locations on the surface of the vortex generator 4, the flow separation point can be effectively fixed at the sharp edge of the microgrooves 401. The microgrooves 401 act like an artificial trigger, and no matter how the flow velocity changes, the boundary layer flow will be forced to separate once it reaches this sharp edge, which ensures the stability of the separation point position.

[0035] Creating a local adverse pressure gradient: A standing vortex is formed inside the micro-groove 401, generating reverse pressure. When the mainstream boundary layer flows through this area, the reverse pressure gradient forces it to separate prematurely. Destroying boundary layer stability: The abrupt change in surface roughness caused by the microgroove 401 (Ra increases from 0.1 μm to 10 μm) causes the laminar boundary layer to transition to turbulent flow. The turbulent boundary layer is more difficult to adhere to, and the separation point is locked. Geometric anchoring effect: Even with variations in Re, the fluid cannot "bypass" the physical channels and must separate at these points. Experiments show that the microgroove 401 reduces the separation point's movement range from ±15° to ±2°. When the boundary layer flow reaches the sharp trailing edge of the microgroove 401, it is forcibly separated. The position of the separation point S is precisely fixed at this location, resulting in a highly stable, regular, and symmetrical vortex street. A stable vortex street means a clearer signal detected by the sensor and a higher signal-to-noise ratio, thereby improving measurement accuracy and allowing the flow meter to operate normally over a wider velocity range (i.e., a wider range ratio). The microgroove 401 technology is equivalent to adding a mechanical phase-locked loop to the vortex street, forcibly locking the separation point through a microstructure. This transforms the previous passive vortex separation into active vortex-controlled separation, representing the ultimate means to overcome the limitations of vortex flow meter principles and achieve ultra-high precision and wide range.

[0036] like Figures 1-3 As shown, the probe assembly includes a support base 10 fixedly connected to the side wall of the tube body 1. An internal mounting base 7 is assembled inside the support base 10. An internal vortex sensor 6 is assembled inside the cavity of the internal mounting base 7. The probe of the internal vortex sensor 6 extends into the cavity of the tube body 1. A first clamping nut 603 is assembled on the upper side of the internal mounting base 7 above the internal vortex sensor 6. An anti-loosening cap 604 is assembled on the upper side of the first clamping nut 603.

[0037] like Figure 3As shown, a sealing element 601 is installed at the bottom of the inner cavity of the built-in mounting base 7, and an O-ring 602 is fitted on the side wall of the built-in vortex sensor 6, abutting against the inner wall of the built-in mounting base 7. The O-ring 602 is not present in the existing structure. In the past, the sealing was achieved by the sealing element 601. The O-ring 602 is set to prevent leakage when the sealing element 601 fails.

[0038] like Figure 3 As shown, an external mounting base 8 is mounted on the side wall of the built-in mounting base 7. A fixing plate 901 is fixedly connected to the inner wall of the external mounting base 8 near the top. An external vortex sensor 9 is mounted on the top of the fixing plate 901. The probe of the external vortex sensor 9 passes through the fixing plate 901. A second clamping nut 902 is mounted on the inner wall of the external mounting base 8 above the external vortex sensor 9. like Figures 1-3 As shown, the built-in vortex sensor 6 and the external vortex sensor 9 are electrically connected to the first circuit lead 605 and the second circuit lead 903, respectively. The other ends of the first circuit lead 605 and the second circuit lead 903 are both electrically connected to the transmitter head 12.

[0039] Specifically, the focus of this solution is that the twin probes have the same sensor arrangement and the same orientation, so that the effect of the vibration source on the two probes is completely consistent. The external vortex sensor 9 is supported by an external mounting base 8 and is not mounted on the support column 11 because the support column 11 supports the large transmitter head 12 and is like a cantilever beam, which may cause vibration resonance and thus transmit the vibration to the external vortex sensor 9.

[0040] like Figure 7 As shown, when the vortex flowmeter is working, the built-in vortex sensor 6 senses the beneficial frequency signal generated when the fluid passes through the vortex generator, such as... Figure 7 As shown in Figure a, unwanted frequency signals from pipe vibration were also detected, such as... Figure 7 As shown in b, when the two signals are superimposed, a chaotic frequency signal is formed, such as... Figure 7 As shown in c; Since the external vortex sensor 9 is installed outside the pipe body 1, it does not receive beneficial fluid frequency signals and can only sense the useless frequency signals caused by pipe vibration. Since the two sensors are fixed together, the useless frequency signals are the same.

[0041] The signals from the two sensors are acquired, amplified, and input into the microprocessor, such as... Figure 7 As shown, the disordered frequency signals (such as those collected by the built-in vortex sensor 6) are displayed. Figure 7As shown in c), subtract the useless frequency signal collected by the external vortex shear sensor 9 (such as...). Figure 7 As shown in a), a useful frequency signal can be obtained (such as...). Figure 7 (as shown in a).

[0042] like Figure 6 As shown, the inner and outer walls of the support base 10 are welded to the side wall of the pipe body 1, and there are first weld marks 101 and second weld marks 102 at the welding position. The side wall of the support base 10 is provided with a bend 103, and the steam coil 14 is adapted to the bend 103. The first weld mark 101 and the second weld mark 102 facilitate further enhancement of sealing and connection stability.

[0043] Example 2: A method for assembling a vortex flow meter with twin probes and both electric and steam coil heating, the method comprising the following steps: S1: The vortex generator 4 is processed into a triangular prism or an isosceles trapezoidal prism, and a coil through hole 402 and an electric heating through hole 403 are opened. Several micro grooves 401 are opened in the vortex generator 4 in the direction of flow. S2: Next, weld the first flange 2 and the second flange 3 to both ends of the pipe body 1, assemble the vortex generator 4 inside the pipe body 1, then weld the built-in mounting base 7 to the side wall of the pipe body 1, then fix the built-in vortex sensor 6 inside the built-in mounting base 7, seal it with the sealing element 601 and the O-ring 602, and then screw in the first clamping nut 603 and the anti-loosening cap 604 in sequence for fixation; S3: Then screw the external mounting base 8 onto the internal mounting base 7, then pass the first circuit lead 605 through the reserved hole on the external mounting base 8, then insert the external vortex sensor 9 into the fixing plate 901, and tighten the second clamping nut 902 to fix it. S4: The steam coil 14 and the armored electric heating cable 15 are respectively wound around the outside of the tube body 1 and passed through the coil through hole 402 and the electric heating through hole 403. The two ends of the steam coil 14 pass through the first connector 16 and the second connector 17 respectively, and the armored electric heating cable 15 is connected from the outlet 18. S5: Then fix the support column 11 on the support base 10, and fix the transmitter head 12 on the top of the support column 11. Connect the first circuit lead 605 and the second circuit lead 903 to the transmitter head 12 to complete the assembly.

[0044] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A vortex flow meter with twin probes for both electric heat tracing and steam coil heat tracing, characterized in that: It includes a pipe body (1), with a first flange (2) and a second flange (3) fixedly connected to both ends of the pipe body (1), a vortex generator (4) provided in the inner cavity of the pipe body (1), and a steam coil (14) and an armored electric heating cable (15) assembled on the side wall of the pipe body (1). A cover (13) is fixedly connected to the outside of the pipe body (1) between the first flange (2) and the second flange (3). A first connector (16) and a second connector (17) are fixedly connected to the side wall of the cover (13). The two ends of the steam coil (14) are connected to the first connector (16) and the second connector (17) respectively. An outlet (18) is provided on the side wall of the cover (13). One end of the armored electric heating cable (15) passes through the outlet (18). The tube body (1) is provided with a probe assembly on its side wall, and the cover (13) is fixedly connected with a support column (11). The top of the support column (11) is equipped with a transmitter meter (12), and the inner wall of the tube body (1) is provided with a rectifier assembly near the left end.

2. The vortex flow meter with twin probes for both electric heat tracing and steam coil heat tracing as described in claim 1, characterized in that: The vortex generator (4) has several micro-grooves (401) on its side wall, and the direction of the micro-grooves (401) is along the direction of the tube body (1). The end face of the vortex generator (4) has a coil through hole (402) and an electric heating through hole (403). The steam coil (14) and the armored electric heating cable (15) pass through the coil through hole (402) and the electric heating through hole (403) respectively.

3. The vortex flow meter with twin probes for both electric heat tracing and steam coil heat tracing as described in claim 1, characterized in that: The rectifier assembly includes a rectifier plate (406) mounted on the inner wall of the tube body (1) near the end face. A fixing buckle (404) is mounted between the rectifier plate (406) and the tube body (1). A plurality of rounded square holes (405) are opened on the side wall of the rectifier plate (406), and the rounded square holes (405) are distributed in a linear array.

4. A vortex flow meter with twin probes for both electric heat tracing and steam coil heat tracing as described in claim 1, characterized in that: The probe assembly includes a support base (10) fixedly connected to the side wall of the tube body (1). An internal mounting base (7) is assembled inside the support base (10). An internal vortex sensor (6) is assembled inside the cavity of the internal mounting base (7). The probe of the internal vortex sensor (6) extends into the cavity of the tube body (1). A first clamping nut (603) is assembled on the upper side of the internal mounting base (7) above the internal vortex sensor (6). An anti-loosening cap (604) is assembled on the upper side of the first clamping nut (603).

5. A vortex flow meter with twin probes for both electric heat tracing and steam coil heat tracing as described in claim 4, characterized in that: The bottom of the inner cavity of the built-in mounting base (7) is equipped with a sealing element (601), and the side wall of the built-in vortex sensor (6) is fitted with an O-ring (602), which abuts against the inner wall of the built-in mounting base (7).

6. A vortex flow meter with twin probes for both electric heat tracing and steam coil heat tracing as described in claim 4, characterized in that: The built-in mounting base (7) is fitted with an external mounting base (8) on its side wall. A fixing plate (901) is fixedly connected to the inner wall of the external mounting base (8) near the top. An external vortex sensor (9) is fitted on the top of the fixing plate (901). The probe of the external vortex sensor (9) passes through the fixing plate (901). A second clamping nut (902) is fitted on the inner wall of the external mounting base (8) above the external vortex sensor (9). The built-in vortex sensor (6) and the external vortex sensor (9) are electrically connected to a first circuit lead (605) and a second circuit lead (903), respectively. The other ends of the first circuit lead (605) and the second circuit lead (903) are electrically connected to the transmitter head (12).

7. A vortex flow meter with twin probes for both electric heat tracing and steam coil heat tracing as described in claim 4, characterized in that: The inner and outer walls of the support base (10) are welded to the side wall of the pipe body (1), and there is a first weld scar (101) and a second weld scar (102) at the welding position. The side wall of the support base (10) is provided with a bend (103), and the steam coil (14) is adapted to the bend (103).

8. A method for assembling a vortex flow meter with twin probes for both electric heat tracing and steam coil heat tracing, as described in any one of claims 1-7, characterized in that: The assembly method includes the following steps: S1: The vortex generator (4) is processed into a triangular prism or an isosceles trapezoidal prism, and a coil through hole (402) and an electric heating through hole (403) are opened. Several micro grooves (401) are opened in the vortex generator (4) in the direction of flow. S2: Next, weld the first flange (2) and the second flange (3) to both ends of the pipe body (1), assemble the vortex generator (4) inside the pipe body (1), then weld the built-in mounting base (7) to the side wall of the pipe body (1), then fix the built-in vortex sensor (6) inside the built-in mounting base (7), seal it with the sealing element (601) and the O-ring (602), and then screw in the first clamping nut (603) and the anti-loosening cap (604) in sequence to fix it; S3: Then screw the external mounting base (8) onto the internal mounting base (7), then pass the first circuit lead (605) through the reserved hole on the external mounting base (8), then insert the external vortex sensor (9) into the fixing plate (901), and tighten the second clamping nut (902) to fix it. S4: The steam coil (14) and the armored electric heating cable (15) are respectively wound around the outside of the tube body (1) and passed through the coil through hole (402) and the electric heating through hole (403). The two ends of the steam coil (14) pass through the first connector (16) and the second connector (17) respectively, and the armored electric heating cable (15) is connected from the outlet (18). S5: Then fix the support column (11) on the support base (10), and fix the transmitter head (12) on the top of the support column (11). Connect the first circuit lead (605) and the second circuit lead (903) to the transmitter head (12) to complete the assembly.

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