Flow stabilizer of vortex shedding flowmeter

Abstract

The utility model relates to the field of flow stabilizing equipment, in particular to a flow stabilizing device of a vortex shedding flowmeter, which comprises a throat pipe. The rear end of the throat pipe is fixedly connected with a diffusion pipe, and the inner wall of the diffusion pipe is fixedly connected with six first water distribution strips; when flowing in the contraction pipe, the fluid can integrally rotate due to the flow guide effect of the spiral water diversion strip, turbulence and vortexes in the fluid are reduced through rotation, the flow speed is increased and the static pressure is reduced when the fluid flows through the contraction section, and then the flow speed is reduced and the static pressure is recovered when the fluid enters the diffusion section. The spiral water diversion strip is arranged in the throat pipe so as to rectify fluid through pressure change, the fluid has a certain rotation trend due to the spiral water diversion strip when entering the throat pipe from the shrinkage pipe, the rotation trend is weakened due to the fact that no flow guide structure exists in the throat pipe, but the weak rotation trend still possibly remains when the fluid enters the diffusion pipe from the throat pipe. And the fluid enters the diffusion pipe from the throat pipe and then flows into the outer water channel and the inner water channel, so that the residual rotation trend in the fluid is removed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steady flow equipment field especially relates to a vortex flowmeter steady flow device. BACKGROUND

[0002] Vortex flowmeter is a kind of instrument based on the principle of karman vortex to measure flow, it can be used to measure the flow of gas, liquid and steam and other various fluids, widely used in industrial process control and other fields, when fluid flows through vortex shedding body in vortex flowmeter, vortex shedding body two sides will alternately produce vortex, and vortex flowmeter inside has detection element and can detect the pressure change or vibration signal caused when vortex alternately produces, after this signal is converted into electric signal, through amplification, shaping and other circuit processing, the pulse signal corresponding to vortex shedding frequency is obtained, then according to the preset instrument coefficient, the flow rate of fluid can be calculated, and then the flow is obtained.

[0003] But if the arrangement of fluid conveying pipeline is relatively complex, there are more elbows, tees, valves and other pipe fittings, which will make fluid produce turbulence and vortex, these unstable flow state will interfere with the normal work of vortex flowmeter, leading to the increase of measurement error.

[0004] Therefore, in view of the above-mentioned turbulence and vortex in the fluid conveying pipeline will interfere with the normal work of vortex flowmeter, leading to the increase of measurement error, a vortex flowmeter steady flow device can be designed to reduce turbulence and vortex in fluid by rotating, and after the fluid is rectified by pressure change, the residual rotation tendency in the fluid is reduced to suppress the interference of turbulence and vortex on the work of vortex flowmeter. CONTENT OF THE UTILITY MODEL

[0005] In order to overcome the problem that when the arrangement of fluid conveying pipeline is relatively complex, there are more elbows, tees, valves and other pipe fittings, turbulence and vortex produced in fluid will affect the stable state of fluid, interfere with the normal work of vortex flowmeter, leading to the increase of measurement error.

[0006] The technical scheme of the utility model is: a vortex flowmeter steady flow device, including throat pipe, further including diffusion pipe fixedly connected with the rear end of throat pipe, six first water distribution bars are fixedly connected on the inner wall of diffusion pipe, rear flow pipe is fixedly connected with the rear end of diffusion pipe, main three water distribution bar is fixedly connected in the inside of rear flow pipe, three auxiliary three water distribution bars are fixedly connected with the periphery of main three water distribution bar, taper slot is arranged in the front end of main three water distribution bar, two inner water channels separated by main three water distribution bar and auxiliary three water distribution bar are arranged on the outside of auxiliary three water distribution bar, one outer water channel separated by main three water distribution bar and auxiliary three water distribution bar is arranged on the inside of auxiliary three water distribution bar, and six inner water channels and three outer water channels are arranged, contraction pipe is fixedly connected with the front end of throat pipe, six spiral water distribution bars are fixedly connected on the inner wall of contraction pipe.

[0007] Preferably, the fluid rotates as a whole when flowing in the contraction pipe due to the flow guiding effect of the spiral water distribution strip, so as to reduce the turbulence and vortex in the fluid by rotation, and when the fluid flows through the contraction section, i.e. from the contraction pipe into the throat pipe, the flow rate increases and the static pressure decreases, and then when the fluid enters the diffusion section, i.e. from the throat pipe into the diffusion pipe, the fluid speed decreases and the static pressure recovers, and such pressure change can straighten the fluid and reduce the turbulence degree of the fluid; the fluid has a certain rotation tendency when entering the throat pipe from the contraction pipe due to the spiral water distribution strip, and the rotation tendency is weakened in the throat pipe due to the absence of flow guiding structure, but the fluid still has a weak rotation tendency when entering the diffusion pipe from the throat pipe; the fluid at the outer circle is divided into six streams by the first water distribution strip and sent into the outer water channel, and the fluid at the inner circle is divided into three streams by the main three-way strip after the conical groove, so as to limit the fluid in the inner and outer water channels and remove the residual rotation tendency of the fluid, and the fluid at the inner circle is divided at the rear end of the fluid at the outer circle, so as to reduce the mutual interference of the fluid at the inner and outer circles when being divided.

[0008] Preferably, the rear end of the auxiliary three-way strip is fixed with an extension strip, and converging grooves are formed on both sides of the extension strip.

[0009] Preferably, the length of the auxiliary three-way strip is shorter than that of the main three-way strip, and the length of the main three-way strip is shorter than that of the rear flow pipe.

[0010] Preferably, a damping material damping sleeve is fixed on the outer sides of the diffusion pipe, the rear flow pipe and the contraction pipe, and a plurality of straight grooves are formed on the outer wall of the damping material damping sleeve.

[0011] Preferably, a fixing frame is installed on the outer side of the damping material damping sleeve, and a finger buckle groove is formed on both sides of the fixing frame.

[0012] Preferably, a corner seat is fixed on the lower end of the fixing frame, and a flange is fixed on the rear end of the rear flow pipe and the front end of the contraction pipe.

[0013] Preferably, a vortex flowmeter body is installed on the rear end of the flange of the rear end through bolts and a sealing ring.

[0014] The utility model discloses the beneficial effects of:

[0015] By setting the first water distribution bar, the auxiliary three-way water distribution bar, the conical groove and the spiral water distribution bar, the fluid flowing in the contraction pipe will rotate as a whole due to the flow guiding effect of the spiral water distribution bar, so as to reduce the turbulence and vortex in the fluid by rotation, and when the fluid flows through the contraction section, that is, enters the throat pipe from the contraction pipe, the flow rate increases and the static pressure decreases, and then when the fluid enters the diffusion section, that is, enters the diffusion pipe from the throat pipe, the fluid velocity decreases and the static pressure recovers, and such pressure change can straighten the fluid and reduce the turbulence degree of the fluid; the fluid entering the throat pipe from the contraction pipe has a certain rotation tendency due to the spiral water distribution bar, and the rotation tendency is weakened in the throat pipe due to the absence of flow guiding structure, but the fluid entering the diffusion pipe from the throat pipe still has a weak rotation tendency; when the fluid enters the diffusion pipe from the throat pipe, the fluid at the outer circle is evenly divided into six streams by the first water distribution bar and is sent into the outer water channel, and the fluid at the inner circle is evenly divided into three streams by the main three-way water distribution bar after entering the conical groove, so that the fluid is limited in the inner water channel and the outer water channel to remove the residual rotation tendency of the fluid, and the flow distribution position of the fluid at the inner circle is at the rear end of the flow distribution position of the fluid at the outer circle, so as to reduce the mutual interference of the fluid at the inner circle and the fluid at the outer circle when the fluid is distributed, thereby reducing the turbulence and vortex in the fluid by rotation, and reducing the residual rotation tendency of the fluid after the fluid is straightened by pressure change, so as to inhibit the interference of the turbulence and vortex on the working of the vortex flowmeter, and thus to ensure the measurement accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A throat pipe structure schematic diagram of the vortex flowmeter flow stabilizing device is shown;

[0017] Figure 2 A conical groove structure schematic diagram of the vortex flowmeter flow stabilizing device is shown;

[0018] Figure 3 A first water distribution bar structure schematic diagram of the vortex flowmeter flow stabilizing device is shown;

[0019] Figure 4 A confluence groove structure schematic diagram of the vortex flowmeter flow stabilizing device is shown;

[0020] Figure 5 An inner water channel structure schematic diagram of the vortex flowmeter flow stabilizing device is shown;

[0021] Figure 6 A main three-way water distribution bar structure schematic diagram of the vortex flowmeter flow stabilizing device is shown;

[0022] Figure 7 An auxiliary three-way water distribution bar structure schematic diagram of the vortex flowmeter flow stabilizing device is shown;

[0023] Figure 8The utility model discloses a spiral water distribution strip structure schematic diagram of vortex flowmeter steady flow device is shown.

[0024] Figure 9 The utility model discloses a fixed frame structure schematic diagram of vortex flowmeter steady flow device is shown.

[0025] Figure 10 The utility model discloses a damping material shock absorber cover structure schematic diagram of vortex flowmeter steady flow device is shown.

[0026] Mark explanation: 1, throat pipe, 2, diffusion pipe, 3, first water distribution strip, 4, rear flow pipe, 5, main three division strip, 6, vice three division strip, 7, conical groove, 8, confluence groove, 9, extension strip, 10, inner water channel, 11, outer water channel, 12, contraction pipe, 13, spiral water distribution strip, 14, damping material shock absorber cover, 15, straight groove, 16, fixed frame, 17, finger buckle groove, 18, angle seat, 19, flange, 20, vortex flowmeter body. Specific implementation

[0027] The utility model will be further explained below in connection with the drawings and examples.

[0028] Please refer to Figures 1-10The utility model provides an embodiment: a vortex flowmeter steady flow device, including throat pipe 1, still including the back end fixed connection of throat pipe 1 has diffusion pipe 2, the inner wall of diffusion pipe 2 is fixedly connected with six first water distribution strips 3, the back end of diffusion pipe 2 is fixedly connected with rear flow pipe 4, the inside of rear flow pipe 4 is fixedly connected with main three division strip 5, the periphery of main three division strip 5 is fixedly connected with three auxiliary three division strips 6, the front end of main three division strip 5 is provided with tapered groove 7, the outside of auxiliary three division strip 6 is provided with two inner water channels 10 separated by main three division strip 5 and auxiliary three division strip 6, the inside of auxiliary three division strip 6 is provided with one outer water channel 11 separated by main three division strip 5 and auxiliary three division strip 6, and inner water channel 10 is provided with six, and outer water channel 11 is provided with three, the front end of throat pipe 1 is fixedly connected with contraction pipe 12, the inner wall of contraction pipe 12 is fixedly connected with six spiral water distribution strips 13, and when fluid flows in contraction pipe 12, the whole rotation can occur due to the flow guiding effect of spiral water distribution strip 13, to reduce turbulence and vortex in fluid by rotation, and when fluid flows through contraction section, namely from contraction pipe 12 into throat pipe 1, flow velocity increases and static pressure reduces, then when entering diffusion section, namely from throat pipe 1 into diffusion pipe 2, fluid velocity reduces and static pressure restores, and this pressure change can straighten the fluid, reduce the turbulence degree of fluid, fluid from contraction pipe 12 into throat pipe 1 can have certain rotation tendency due to spiral water distribution strip 13, and this rotation tendency can weaken in throat pipe 1 due to no flow guiding structure, but fluid from throat pipe 1 into diffusion pipe 2 still can have weak rotation tendency, fluid when from throat pipe 1 into diffusion pipe 2, the fluid of outer circle is divided into six and is sent into outer water channel 11 by first water distribution strip 3, and the fluid of inner circle is divided into three after entering tapered groove 7 by main three division strip 5, so that fluid is limited in inner water channel 10 and outer water channel 11 to remove the residual rotation tendency of fluid, and the shunt position of inner circle fluid is at the back end of outer circle fluid shunt position to reduce the mutual interference of inner and outer circle fluid shunt.

[0029] Please refer to Figures 6-10In the embodiment, the rear end of the sub-trip 6 is fixed with an extension strip 9, both sides of the extension strip 9 are provided with a confluence groove 8, the length of the sub-trip 6 is shorter than the main trip 5, the length of the main trip 5 is shorter than the rear flow pipe 4, so that the fluid in the two inner waterways 10 and the outer waterway 11 separated by the same sub-trip 6 can be confluenced first, and the extension strip 9 can continue to limit the outer ring fluid in the process to inhibit the generation of turbulence and vortex, then the three confluences of the fluid flow back for a distance, and then confluences again at the rear end of the main trip 5, and then flows into the vortex flow meter body 20 after flowing back for a distance, so that the total of nine liquid streams are batched and not simultaneously confluenced, and there is a buffer distance after each confluence to ensure the stability of the confluenced fluid, to inhibit the interference of the confluence step on the stability of the fluid, the outer side of the diffusion pipe 2, the rear flow pipe 4 and the contraction pipe 12 is fixed with a damping material damping sleeve 14, a plurality of straight grooves 15 are provided on the outer wall of the damping material damping sleeve 14, the damping material damping sleeve 14 is used to cooperate with the fixing frame 16 to absorb the vibration of the diffusion pipe 2, the rear flow pipe 4 and the contraction pipe 12, and the straight grooves 15 are provided to make the strip structure between adjacent two straight grooves 15 easily deformed under pressure between the damping material damping sleeve 14 and the fixing frame 16, so as to increase the buffering capacity of the damping material damping sleeve 14.

[0030] Please refer to Figures 9-10 In the embodiment, the outer side of the damping material damping sleeve 14 is provided with a fixing frame 16, the two sides of the fixing frame 16 are provided with a finger buckle groove 17, the finger buckle groove 17 is used to facilitate the user to take out the damping material damping sleeve 14 from the fixing frame 16 in the future, the lower end of the fixing frame 16 is fixed with an angle seat 18, the rear end of the rear flow pipe 4 and the front end of the contraction pipe 12 are fixed with a flange 19, the angle seat 18 is used to cooperate with the bolt to install the fixing frame 16 on the wall or steel structure, the rear end of the flange 19 at the rear end is provided with a vortex flow meter body 20 through the bolt and the sealing ring, and the vortex flow meter body 20 is used to detect the flow of the fluid.

[0031] In use, the fluid will rotate as a whole when flowing in the contraction pipe 12 due to the flow guiding effect of the helical flow splitter 13, so as to reduce the turbulence and vortex in the fluid by rotation, and when the fluid flows through the contraction section, i.e. from the contraction pipe 12 into the throat pipe 1, the flow rate increases and the static pressure decreases, and then when the fluid enters the diffusion section, i.e. from the throat pipe 1 into the diffusion pipe 2, the fluid velocity decreases and the static pressure recovers, and such pressure change can straighten the fluid and reduce the turbulence degree of the fluid; the fluid will have a certain rotation tendency when entering the throat pipe 1 from the contraction pipe 12 due to the helical flow splitter 13, and such rotation tendency will be weakened in the throat pipe 1 due to the absence of flow guiding structure, but the fluid may still have a weak rotation tendency when entering the diffusion pipe 2 from the throat pipe 1; the fluid in the outer circle of the fluid will be evenly divided into six streams and sent into the outer waterway 11 when entering the diffusion pipe 2 from the throat pipe 1, and the fluid in the inner circle will be evenly divided into three streams after entering the tapered groove 7, so as to limit the fluid in the inner waterway 10 and the outer waterway 11 to remove the residual rotation tendency of the fluid, and the flow dividing position of the fluid in the inner circle is at the rear end of the flow dividing position of the fluid in the outer circle to reduce the mutual interference of the fluid in the inner and outer circles when the fluid is divided;

[0032] At the same time, the length of the secondary three-way splitter 6 is shorter than that of the primary three-way splitter 5, and the length of the primary three-way splitter 5 is shorter than that of the backflow pipe 4, so that the fluid in the two inner waterways 10 and the outer waterway 11 separated by the same secondary three-way splitter 6 can be merged first, and the extension strip 9 will continue to limit the outer circle of the fluid in this process to suppress the generation of turbulence and vortex, and then the three streams of merged fluid flow backward for a distance and then merge again at the rear end of the primary three-way splitter 5, and flow into the vortex flow meter body 20 after flowing backward for a distance, so that a total of nine streams of liquid are merged in batches rather than simultaneously, and there is a buffer distance after each merging to ensure the stability of the merged fluid and to suppress the interference of the merging step on the stability of the fluid;

[0033] Secondly, the damping material damping sleeve 14 is used in cooperation with the fixing frame 16 to absorb the vibration of the diffusion pipe 2, the backflow pipe 4 and the contraction pipe 12, and the straight grooves 15 are provided to make the strip structure between adjacent two straight grooves 15 easily deformed under pressure between the damping material damping sleeve 14 and the fixing frame 16, so as to increase the buffering capacity of the damping material damping sleeve 14.

[0034] Through the above steps, by setting the first water bar 3, the vice three water bar 6, the tapered groove 7 and the spiral water bar 13, the fluid in the contraction pipe 12 will be rotated as a whole due to the guiding effect of the spiral water bar 13 when flowing, so as to reduce the turbulence and vortex in the fluid by rotation, and when the fluid flows through the contraction section, that is, from the contraction pipe 12 into the throat pipe 1, the flow rate increases and the static pressure decreases, then when entering the diffusion section, that is, from the throat pipe 1 into the diffusion pipe 2, the fluid velocity decreases and the static pressure recovers, such pressure change can straighten the fluid and reduce the degree of turbulence of the fluid; the fluid from the contraction pipe 12 into the throat pipe 1 will have a certain rotating tendency due to the spiral water bar 13, which will be weakened in the throat pipe 1 due to the absence of guiding structure, but the fluid from the throat pipe 1 into the diffusion pipe 2 still may have weak rotating tendency; the fluid from the throat pipe 1 into the diffusion pipe 2, the outer circle of the fluid is divided into six by the first water bar 3 and sent into the outer water channel 11, and the inner circle of the fluid is divided into three by the main three water bar 5 after entering the tapered groove 7, so that the fluid is limited in the inner water channel 10 and the outer water channel 11 to remove the residual rotating tendency of the fluid, and the flow dividing position of the inner circle of the fluid is at the rear end of the flow dividing position of the outer circle of the fluid, so as to reduce the mutual interference of the inner and outer circle of the fluid when dividing, thereby reducing the turbulence and vortex in the fluid by rotation, and reducing the residual rotating tendency of the fluid after straightening the fluid by pressure change, so as to suppress the interference of turbulence and vortex on the working of the vortex shedding flowmeter, and further to ensure the measurement accuracy.

Claims

1. A vortex flowmeter flow straightener comprising a throat (1) characterized by: The back end of the throat pipe (1) is fixedly connected with a diffusion pipe (2), six first water distribution strips (3) are fixedly connected on the inner wall of the diffusion pipe (2), the back end of the diffusion pipe (2) is fixedly connected with a back flow pipe (4), the inside of the back flow pipe (4) is fixedly connected with a main three-way strip (5), the periphery of the main three-way strip (5) is fixedly connected with three auxiliary three-way strips (6), the front end of the main three-way strip (5) is provided with a tapered groove (7), the outer side of the auxiliary three-way strip (6) is provided with two inner water channels (10) which are separated by the main three-way strip (5) and the auxiliary three-way strip (6), the inner side of the auxiliary three-way strip (6) is provided with an outer water channel (11) which is separated by the main three-way strip (5) and the auxiliary three-way strip (6), the inner water channels (10) are six in total, and the outer water channel (11) is three in total, the front end of the throat pipe (1) is fixedly connected with a contraction pipe (12), and six spiral water distribution strips (13) are fixedly connected on the inner wall of the contraction pipe (12).

2. A vortex flowmeter flow straightener according to claim 1, wherein: The back end of the auxiliary three-way strip (6) is fixedly connected with an extension strip (9), and the two sides of the extension strip (9) are provided with a confluence groove (8).

3. A vortex flowmeter flow straightener according to claim 1 wherein: The length of the auxiliary three-way strip (6) is shorter than that of the main three-way strip (5), and the length of the main three-way strip (5) is shorter than that of the back flow pipe (4).

4. A vortex flowmeter flow straightener according to claim 1 wherein: The outer side of the diffusion pipe (2), the back flow pipe (4) and the contraction pipe (12) is jointly fixedly connected with a damping material damping sleeve (14), and a plurality of straight grooves (15) are formed in the outer wall of the damping material damping sleeve (14).

5. A vortex flowmeter flow straightener according to claim 4 wherein: The outer side of the damping material damping sleeve (14) is mounted with a fixing frame (16), and a finger buckle groove (17) is formed in the two sides of the fixing frame (16).

6. A vortex flowmeter flow straightener according to claim 5 wherein: The lower end of the fixing frame (16) is fixedly connected with a corner seat (18), and the back end of the back flow pipe (4) and the front end of the contraction pipe (12) are fixedly connected with flanges (19).

7. A vortex flowmeter flow straightener according to claim 6 wherein: The back end of the flange (19) at the back end is mounted with a vortex flowmeter body (20) through bolts and sealing rings.

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