Plug-in vortex shedding flowmeter

Abstract

The utility model discloses a plug-in type vortex shedding flowmeter which comprises a pipeline connecting pipe connected to a pipeline in an inserted mode, a butt joint round block is arranged at the bottom of the pipeline connecting pipe, a connecting sleeve is arranged at the bottom of the butt joint round block, the connecting sleeve and the butt joint round block are fixedly connected through a bolt, and a measuring pipe is arranged at the bottom of the connecting sleeve. A vortex street probe is arranged in the connecting sleeve, a vortex generating body is arranged in the measuring pipe, a pipeline connector is arranged on one side of the pipeline, a pipeline flange is arranged on the top of the pipeline connector, and a disc is arranged on the top of the pipeline connecting pipe. The streamline conical opening is designed at the front end of the straight pipe part of the measuring pipe, so that the flow velocity distribution of fluid entering a measuring area can be optimized, the turbulent flow and rotational flow phenomena in fluid dynamics are reduced, and the vortex at the back of the vortex generating body can fall off more regularly and stably; and the unstable fluid dynamic effect caused by vibration is reduced, so that the overall measurement reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of instruments and meters, in particular to an insertion type vortex flowmeter. Background Art

[0002] The vortex flowmeter is a volume flowmeter that measures the volume flow rate, standard volume flow rate or mass flow rate of gas, steam or liquid, which is developed based on the Karman vortex principle. It is mainly used for flow measurement of industrial pipeline medium fluids, such as gas, liquid, steam and other media.

[0003] At present, most of the existing insertion vortex flowmeters are DN50 straight measuring tubes. Since insertion vortex flowmeters are mostly used in large-diameter pipelines, the K coefficient is inversely proportional to the inner diameter of the vortex flowmeter flow tube. For the same flow rate, the larger the diameter, the lower the vortex frequency. When measured with a DN50 straight measuring tube, the vortex intensity generated at low flow rates is weak and difficult to be accurately captured by the sensor. This low-intensity signal is more susceptible to external interference, such as pipeline vibration, which leads to increased measurement errors. Utility Model Content

[0004] The purpose of the utility model is to provide an insertion type vortex flowmeter to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an inserted vortex flowmeter, comprising a pipe connecting pipe inserted into a pipe, a docking block is arranged at the bottom of the pipe connecting pipe, a connecting sleeve is arranged at the bottom of the docking block, the connecting sleeve and the docking block are fixedly connected by bolts, a measuring tube is arranged at the bottom of the connecting sleeve, a vortex probe is arranged inside the connecting sleeve, a vortex generator is arranged inside the measuring tube, a pipe interface is arranged on one side of the pipe, a pipe flange is arranged on the top of the pipe interface, a disc is arranged on the top of the pipe connecting pipe, a connecting pipe is arranged on the top of the disc, and a flowmeter head is screwed on the top of the connecting pipe.

[0006] Preferably, the diameter of the pipeline interface is greater than the length of the measuring tube, a sealing gasket is sleeved on the disc, and the sealing gasket is bonded to the pipeline flange.

[0007] Preferably, a connecting pipe flange is movably sleeved on the connecting pipe, and the connecting pipe flange is pressed onto the disc.

[0008] Preferably, a fixing screw is inserted into the connecting pipe flange, and the bottom of the fixing screw passes through the pipeline flange and is threaded with a nut.

[0009] Preferably, the measuring tube comprises a measuring tube tapered inlet section and a measuring tube straight section, and the end of the vortex probe extends into the measuring tube.

[0010] Preferably, the conical inlet pipe section of the measuring tube has a conical structure, and the conical inlet pipe section of the measuring tube is fixedly connected to the straight pipe section of the measuring tube.

[0011] Preferably, the diameter of the tapered inlet of the tapered inlet pipe section of the measuring tube is larger than the diameter of the tapered connecting port of the tapered inlet pipe section of the measuring tube.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model designs a streamlined cone at the front end of the straight tube part of the measuring tube, which can optimize the flow velocity distribution of the fluid entering the measuring area, reduce the turbulence and swirl phenomena in fluid dynamics, and thus make the vortex shedding behind the vortex generator more regular and stable. By improving the inlet structure, the unstable fluid dynamics effect caused by vibration is reduced, thereby improving the overall measurement reliability.

[0014] 2. The utility model utilizes the cooperation of the fixing screw and the nut to facilitate the pressing of the connecting pipe flange onto the disc, thereby forming a stable fixing structure, ensuring that the flow meter is more firmly fixed in the pipeline, reducing the measurement error caused by vibration, and improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model of an insertion type vortex flowmeter plugged into a pipeline.

[0016] Figure 2 It is a partial cross-sectional view of the insertion type vortex flowmeter of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the connecting sleeve of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the bottom of the pipeline connecting pipe of the utility model.

[0019] Figure 5 It is a schematic diagram of the structure between the connecting pipe and the pipeline connecting pipe of the utility model.

[0020] In the figure: flow meter head 1; pipeline 2; pipeline interface 21; pipeline flange 22; connecting cover 3; sealing gasket 31; pipeline connecting pipe 4; docking block 41; measuring tube 5; measuring tube conical inlet pipe section 51; measuring tube straight pipe section 52; vortex street probe 6; vortex generator 7; connecting pipe 8; connecting pipe flange 81; fixing screw 82; nut 83; connecting sleeve 9. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 5 The utility model provides a technical solution: an insertion type vortex flowmeter, comprising a pipe connecting pipe 4 plugged into a pipe 2, the bottom of the pipe connecting pipe 4 is fixedly connected with a docking round block 41, the bottom of the docking round block 41 is provided with a connecting sleeve 9, the connecting sleeve 9 and the docking round block 41 are fixedly connected by bolts, the bottom of the connecting sleeve 9 is fixedly connected with a measuring pipe 5, and the measuring pipe 5 comprises a measuring pipe tapered inlet pipe section 51 and a measuring pipe straight pipe section 52.

[0023] A pipe interface 21 is provided on one side of the pipe 2, and a pipe flange 22 is fixedly connected to the top of the pipe interface 21, and a disc 3 is fixedly connected to the top of the pipe connecting pipe 4. The disc 3 is overlapped on the pipe flange 22, and a connecting pipe 8 is fixedly connected to the top of the disc 3. The diameter of the disc 3 is larger than the pipe mouth diameter of the pipe interface 21, which facilitates the overlap of the disc 3 on the pipe flange 22. The top of the connecting pipe 8 is screwed with a flow meter head 1. The threaded connection facilitates installation and disassembly, making the maintenance and replacement of the flow meter head 1 more convenient and quick.

[0024] A sealing gasket 31 is sleeved on the disc 3, and the sealing gasket 31 is bonded to the pipe flange 22. A connecting pipe flange 81 is movably sleeved on the connecting pipe 8, and the connecting pipe flange 81 is pressed onto the disc 3. The setting of the sealing gasket 31 is beneficial to the sealing effect of the connection between the pipe flange 22 and the disc 3.

[0025] A fixing screw 82 is inserted into the connecting pipe flange 81, and the bottom of the fixing screw 82 passes through the pipe flange 22 and is screwed with a nut 83. By using the fixing screw 82 and the nut 83 in coordination, the connecting pipe flange 81 can be pressed onto the disc 3 to form an inserted vortex flowmeter fixedly installed on the pipeline 2, thereby reducing measurement errors caused by vibration and improving measurement accuracy.

[0026] The diameter of the pipeline interface 21 is larger than the length of the measuring tube 5, which facilitates the plug-in operation of the vortex flowmeter on the pipeline 2. A vortex probe 6 is installed inside the connecting sleeve 9. The vortex probe 6 is electrically connected to the interface of the flowmeter head 1 through a wire. A vortex generator 7 is installed inside the measuring tube 5. The vortex generator 7 is used to generate a vortex for flow measurement.

[0027] The end of the vortex probe 6 extends into the measuring tube 5, and the measuring tube conical inlet pipe section 51 is fixedly connected to the measuring tube straight pipe section 52. The measuring tube conical inlet pipe section 51 has a conical structure, and the conical inlet diameter of the measuring tube conical inlet pipe section 51 is larger than the conical connecting port diameter of the measuring tube conical inlet pipe section 51.

[0028] By selecting a streamlined conical inlet, this design is beneficial to improving the stability of medium flow and reducing pressure loss. In addition, by adjusting the upper and lower diameters of the cone mouth, the frequency signal of the reaction flow detected by the vortex probe 6 and the frequency signal of the pipeline vibration are placed in different frequency ranges, thereby reducing the external vibration interference to the inserted vortex flowmeter.

[0029] In summary, the utility model designs a streamlined cone at the front end of the straight tube part of the measuring tube, which can optimize the flow velocity distribution of the fluid entering the measuring area, reduce turbulence and swirl phenomena in fluid dynamics, and thus make the vortex shedding behind the vortex generating body more regular and stable. By improving the inlet structure, the unstable fluid dynamics effect caused by vibration is reduced, thereby improving the overall measurement reliability.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An insertion type vortex flowmeter, comprising a pipe connection pipe (4) plugged into a pipe (2), characterized in that: A docking round block (41) is provided at the bottom of the pipeline connecting pipe (4), a connecting sleeve (9) is provided at the bottom of the docking round block (41), the connecting sleeve (9) and the docking round block (41) are fixedly connected by bolts, a measuring tube (5) is provided at the bottom of the connecting sleeve (9), a vortex street probe (6) is provided inside the connecting sleeve (9), a vortex generator (7) is provided inside the measuring tube (5), a pipeline interface (21) is provided on one side of the pipeline (2), a pipeline flange (22) is provided at the top of the pipeline interface (21), a disc (3) is provided at the top of the pipeline connecting pipe (4), a connecting pipe (8) is provided at the top of the disc (3), and a flow meter head (1) is screwed to the top of the connecting pipe (8).

2. An insertion type vortex flowmeter according to claim 1, characterized in that: The diameter of the pipeline interface (21) is greater than the length of the measuring tube (5). A sealing gasket (31) is sleeved on the disc (3), and the sealing gasket (31) is bonded to the pipeline flange (22).

3. The insertion type vortex flowmeter according to claim 1, characterized in that: A connecting pipe flange (81) is movably sleeved on the connecting pipe (8), and the connecting pipe flange (81) is pressed onto the disc (3).

4. An insertion type vortex flowmeter according to claim 3, characterized in that: A fixing screw (82) is inserted into the connecting pipe flange (81), and the bottom of the fixing screw (82) passes through the pipeline flange (22) and is screwed with a nut (83).

5. The insertion type vortex flowmeter according to claim 1, characterized in that: The measuring tube (5) comprises a measuring tube conical inlet tube section (51) and a measuring tube straight tube section (52), and the end of the vortex probe (6) extends into the measuring tube (5).

6. An insertion type vortex flowmeter according to claim 5, characterized in that: The measuring tube tapered inlet pipe section (51) is in a tapered structure, and the measuring tube tapered inlet pipe section (51) is fixedly connected to the measuring tube straight pipe section (52).

7. The insertion type vortex flowmeter according to claim 5, characterized in that: The conical inlet diameter of the measuring tube conical inlet pipe section (51) is larger than the conical connecting port diameter of the measuring tube conical inlet pipe section (51).

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