Vortex street signal detection device with adjustable measurement position

Abstract

The utility model relates to a vortex street signal detection device with an adjustable measuring position, which can be connected in series on a medium pipeline with a fluid medium, and comprises a vortex street generating part, a measuring part and an upper computer, the vortex street generating part comprises a pipe body, a vortex street generating column and a measuring part mounting seat, the pipe body can be connected in series on the medium pipeline, and the measuring part mounting seat is arranged on the pipe body. The vortex street generation column is fixedly installed in the pipe body perpendicular to the axis of the pipe body, the measuring part installation base and the outer wall of the pipe body are integrally formed, an insertion hole in the axial direction of the pipe body is formed in the measuring part installation base, the insertion hole is communicated with the interior of the pipe body, the installation end of the measuring part is detachably connected with the measuring part installation base, and the measuring end extends into the inner wall of the pipe body through the insertion hole. The measuring portion is arranged on the vortex street generating column, the measuring end of the measuring portion is located behind the vortex street generating column in the flowing direction of media, an inertia measuring unit is arranged in the measuring end, the upper computer is electrically connected with the inertia measuring unit, and oscillation information measured by the inertia measuring unit is calculated and converted into flow information of the media through the upper computer.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluid testing devices, and in particular relates to a vortex signal detection device with adjustable measuring position. Background Art

[0002] The Karman vortex street is a key phenomenon in fluid mechanics. It occurs when a steady flow, under certain conditions, passes around an object. A pair of regularly arranged, oppositely rotating linear vortices periodically shed from either side of the object. Through nonlinear interactions, these vortices form a Karman vortex street. This phenomenon is very common in nature, for example, when water flows over bridge piers or wind blows over tall towers, chimneys, and power lines. This phenomenon is not only ubiquitous in nature but also has important applications in engineering and scientific research.

[0003] Vortex flowmeters, leveraging the unique fluid oscillation characteristics of the Karman vortex flow, are widely used in flow measurement. They offer numerous advantages, including a simple structure, wide measuring range, high accuracy, and robust applicability. However, vortex flowmeters essentially measure the vibration of the Karman vortex flow. Therefore, the distance between the vortex flowmeter and the vortex generator can affect the measured vortex frequency, thereby impacting the accuracy of the fluid velocity and flow rate. Traditional vortex flowmeters can only be tested at a fixed location and are unable to detect differences in vortex signals at different distances from the vortex generator, thus compromising the accuracy of the measured fluid velocity and flow rate. Utility Model Content

[0004] The purpose of the utility model is to provide a vortex signal detection device with adjustable measuring position, aiming to solve the problem that the vortex flowmeter in the prior art is only tested at a fixed position, and the distance between the vortex flowmeter and the vortex generating device will affect the measurement accuracy of the fluid flow rate and flow rate. Since the existing fixed position cannot detect the difference in vortex signals at different distances from the vortex generating device, the measurement of the fluid flow rate and flow rate is not accurate enough.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A vortex signal detection device with adjustable measuring position, which can be connected in series with a medium pipeline containing a fluid medium, comprises a vortex generating part, a measuring part and a host computer.

[0007] The vortex generating portion includes a tube body, a vortex generating column, and a measuring portion mounting seat. The tube body can be mounted in series on a medium pipeline. The vortex generating column is fixedly mounted in the tube body perpendicular to the axis of the tube body. The measuring portion mounting seat is integrally formed with the outer wall of the tube body. The measuring portion mounting seat is provided with a socket along the axial direction of the tube body. The socket is connected to the interior of the tube body and is located behind the vortex generating column along the direction of medium flow.

[0008] The measuring end of the measuring part can be inserted into the interior of the tube body from different positions through the insertion hole, the measuring end is provided with an inertial measurement unit, and the mounting end of the measuring part is detachably connected to the measuring part mounting seat;

[0009] The host computer is connected to the inertial measurement unit by electrical signals.

[0010] The beneficial effect of the present invention is that the jack is used in conjunction with the measuring part so that the measuring end of the measuring part can be extended into the tube body from different positions, thereby changing the distance between the measuring end of the measuring part and the vortex generating part, and the difference in vortex signals at different distances from the vortex generating part can be detected, so that the vortex frequency signal can be accurately measured, thereby improving the measurement accuracy of the fluid flow rate and flow, and further improving the detection effect of the vortex signal detection experimental device.

[0011] Furthermore, the cross section of the vortex generating column is an isosceles triangle, and the top of the isosceles triangle is arranged relative to the direction of flow of the medium.

[0012] A further beneficial effect of the present invention is that the vortex generating column is arranged in the shape of an isosceles triangular prism, which can form a more stable Karman vortex street.

[0013] Furthermore, the measuring part includes a mounting block and a detection rod, one end of the detection rod vertically passes through the mounting block and is fixedly connected thereto, the diameter of the detection rod is the same as the width of the socket, the other end of the detection rod passes through the socket and extends into the interior of the tube body, and the inertial measurement unit is installed on the other end of the detection rod; the lower end surface of the mounting block is detachably connected to the upper end surface of the measuring part mounting seat.

[0014] A further beneficial effect of the present invention is that the detection rod is fixedly connected to the mounting block and then fixedly connected to the mounting seat of the measuring part. Since the lower end face of the mounting block fits with the upper end face of the measuring part and the detection rod itself is perpendicular to the mounting block, it can be ensured that the detection rod extends into the pipe body in a vertical posture, is also perpendicular to the flow direction of the medium, and remains parallel to the vortex generating column, thereby ensuring the accuracy of the measurement solution as much as possible.

[0015] Furthermore, the lower end face of each gasket is adapted to the shape of the upper end face of the measuring part mounting seat and is detachably connected thereto. Each gasket is provided with a through hole with the same outer diameter as the detection rod, the through hole is connected to the socket, and the through hole on each gasket has a different spacing from the vortex generating column along the length direction of the socket. The detection rod passes through the through hole and the socket in turn and extends into the tube body, and the lower end of the mounting block is detachably connected to the upper end of the gasket.

[0016] A further beneficial effect of the present invention is that by arranging different gaskets between the mounting block and the measuring part, the fixing block can be satisfied with different positions, thereby adjusting the distance between the detection rod and the vortex generating area, and obtaining vibration information of the medium fluid at different distances. The screw holes near the through hole can ensure that the fixing block can always be stably installed through the gasket. The through holes are respectively adapted to the detection diameter and the width of the socket. The detection rod is tightly attached to the inner wall of the through hole and then extends into the interior of the tube body along the socket, which can play a clamping role, effectively preventing the part where the detection rod extends into the tube body from shaking due to the vibration of the fluid.

[0017] Furthermore, a scale line is provided on one side surface of the measuring part mounting seat along the axial direction of the tube body, and each gasket is provided with an identification line on the corresponding side surface, and the identification line coincides with the axis of the through hole along a direction perpendicular to the length of the gasket.

[0018] A further beneficial effect of the present invention is that by setting scale lines on the side of the measuring part mounting seat, it is easy to observe, and since the diameters of the through hole and the detection rod are the same, the marking line on the side of the gasket aligned with the axis of the through hole can accurately reflect the positional relationship of the detection rod.

[0019] Furthermore, the upper end surface of the measuring part mounting seat is provided with a groove surrounding the outer periphery of the jack, and a sealing ring is provided in the groove, and the sealing ring abuts and seals against the lower end surface of the gasket.

[0020] A further beneficial effect of the present invention is that the sealing effect between the gasket and the measuring part mounting seat is enhanced by utilizing the sealing ring.

[0021] Furthermore, a groove is provided on the lower end surface of the mounting block around the outer circumference of the detection rod, and a sealing ring is provided in the groove, and the sealing ring abuts and seals against the upper end surface of the gasket.

[0022] A further beneficial effect of the present invention is that the sealing effect between the gasket and the mounting block is enhanced by utilizing the sealing ring.

[0023] Furthermore, the measuring part also includes a circuit board body and a circuit board interface. The detection rod is hollow. The circuit board body and the circuit board interface are fixedly connected to the inner wall of the detection rod. The inertial measurement unit is welded on the circuit board. The circuit board body is connected to the circuit board interface wire, and the circuit board interface is connected to the upper computer electrical signal.

[0024] To sum up, the utility model provides a vortex signal detection device with adjustable measuring position. By matching different gaskets with jacks, it can ensure that the detection rod of the measuring part extends into the tube body from different positions behind the vortex generating column. By changing the position of the detection rod extending into the tube body, the vortex signal generated by the vortex generating column at different distances from the vortex generating column is measured, so that the vortex frequency signal can be accurately measured, which enriches the data of detecting the vortex signal and greatly improves the detection efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an overall schematic diagram of a vortex signal detection device with adjustable measurement position provided by the utility model;

[0026] Figure 2 This is an overall schematic diagram of a tube body in a vortex signal detection device with adjustable measurement position provided by the utility model;

[0027] Figure 3 This is a front cross-sectional view of a tube body in a vortex signal detection device with adjustable measuring position provided by the utility model;

[0028] Figure 4 This is a side view of a tube body in a vortex signal detection device with adjustable measurement position provided by the utility model;

[0029] Figure 5 A top view of a gasket in a vortex signal detection device with adjustable measurement position provided by the utility model;

[0030] Figure 6 A top view of another gasket in a vortex signal detection device with adjustable measuring position provided by the utility model;

[0031] Figure 7 This is a top view of the third gasket in the vortex signal detection device with adjustable measurement position provided by the utility model;

[0032] Figure 8 This is an overall schematic diagram of the measuring part of a vortex signal detection device with adjustable measuring position provided by the utility model;

[0033] Figure 9 The present invention provides a bottom view of the measuring portion of a vortex signal detection device with adjustable measuring position.

[0034] Reference numerals

[0035] 1. Vortex generating unit; 110. Tube body; 120. Vortex generating column; 130. Measuring unit mounting base; 131. Jack; 132. Scale line; 133. Groove A; 134. Sealing ring A; 2. Measuring unit; 210. Mounting block; 211. Groove B; 212. Sealing ring B; 220. Measuring rod; 230. Inertial measurement unit; 3. Gasket; 310. Through hole; 320. Identification line. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] like Figures 1-6 As shown, the embodiment of the present invention is a vortex signal detection device with adjustable measuring position, which can be connected in series with a medium pipeline with a fluid medium, including a vortex generating part 1, a measuring part 2 and a host computer.

[0038] The vortex generating part 1 includes a tube body 110, a vortex generating column 120 and a measuring part mounting seat 130. The tube body 110 is a hollow cylinder. Both ends can be mounted in series on the medium pipeline through flanges or threads. The inner and outer diameters of the vortex generating column 120 are adapted to the medium pipeline connected in series. The vortex generating column 120 is fixedly mounted in the tube body 110 perpendicular to the axis of the tube body 110, specifically perpendicular to the flow direction of the medium. The two ends are welded to the inner wall of the tube body 110. The measuring part mounting seat 130 is connected to the tube body 110. 0 is integrally formed, having rectangular upper and lower surfaces parallel to the horizontal plane, and four side surfaces perpendicular to the upper end surface, the lower ends of the side surfaces naturally transition to the side walls of the tube body 110, and the upper end surface of the measuring portion mounting seat 130 is provided with a socket 131 arranged along the axial direction of the tube body 110, the top projection of the socket 131 coincides with the axis of the tube body 110 and is located behind the vortex generating column 120 along the direction of medium flow, and the socket 131 is connected downward to the interior of the tube body 110.

[0039] The measuring end of the measuring part 2 can be extended into the interior of the tube body 110 from different positions through the jack 131. The mounting end of the measuring part 2 is detachably connected to the measuring part mounting base 130. The measuring end is provided with an inertial measurement unit 230. The host computer is electrically connected to the inertial measurement unit 230. The inertial measurement unit 230 is referred to as IMU for short. It is a device for measuring the three-axis attitude angle (or angular velocity) and acceleration of an object. Generally, an IMU includes three single-axis accelerometers and three single-axis gyroscopes. The accelerometer detects the acceleration signal of the object in the independent three axes of the carrier coordinate system, while the gyroscope detects the angular velocity signal of the carrier relative to the navigation coordinate system, measures the angular velocity and acceleration of the object in three-dimensional space, and thereby calculates the attitude of the object. The prior art of the inertial measurement unit 230, its principle and usage are well known and will not be repeated here.

[0040] Through the above technical solution, the utility model utilizes the jack 131 to cooperate with the measuring part 2, so that the measuring end of the measuring part 2 can be extended into the tube body 110 from different positions. Therefore, by changing the distance between the measuring end of the measuring part 2 and the vortex generating part 1, the difference in vortex signals at different distances from the vortex generating part is detected, so that the vortex frequency signal can be accurately measured, thereby improving the measurement accuracy of the fluid flow rate and flow, and further improving the detection effect of the vortex signal detection experimental device.

[0041] In some embodiments, the shape of the vortex generating column 120 is set to a triangular prism, that is, the cross-section of the vortex generating column 120 is an isosceles triangle, and the top of the isosceles triangle is arranged relative to the direction of medium flow. When the fluid medium enters the tube body 110 from one end of the tube body 110 and passes through the vortex generating column 120, it first contacts the triangular end of the vortex generating column 120, and then forms a Karman vortex street on both sides of the vortex generating column 120. Through the above technical solution, the utility model can form a Karman vortex street more stably using a triangular prism.

[0042] In some embodiments, the measuring part 2 includes a mounting block 210 and a detection rod 220. The mounting block 210 is a rectangular solid block. One end of the detection rod 220 passes through the mounting block 210 vertically and is fixedly connected to it. The two surfaces passed by the detection rod 220 are the upper end face and the lower end face of the mounting block 210 respectively. The diameter of the detection rod 220 is the same as the width of the socket 131. The other end of the detection rod 220 passes through the socket 131 and extends into the interior of the tube body 110. The inertial measurement unit 230 is installed at this end and enters the tube body 110. The lower end face of the mounting block 210 is detachably connected to the upper end face of the measuring part mounting seat 130. The detection rod 220 is fixedly connected to the mounting block 210 of the utility model, and is fixedly connected to the measuring part mounting seat 130. Since the lower end surface of the mounting block 210 is in contact with the upper end surface of the measuring part 2, and the detection rod 220 itself is perpendicular to the mounting block 210, it can be ensured that the detection rod 220 extends into the tube body 110 in a vertical posture, is also perpendicular to the direction of medium flow, and remains parallel to the vortex generating column 120, thereby ensuring the accuracy of the measurement solution as much as possible.

[0043] 131 , and the screw holes 310 are connected to the fixing plate 132 of the fixing plate 130 so that the fixing plate 132 can be connected to the fixing plate 130 by screwing. 131 , and the through holes 310 are respectively adapted to the detection diameter and the width of the plug hole 131 . The detection rod 220 is close to the inner wall of the through hole 310 and then extends into the interior of the tube body 110 along the plug hole 131 , which can play a role of being clamped, and effectively prevents the part where the detection rod 220 extends into the tube body 110 from shaking due to the vibration of the fluid.

[0044] In some embodiments, a scale line 132 is provided on one side surface of the measuring part mounting seat 130 along the axial direction of the tube body 110, and each gasket 3 is provided with an identification line 320 on the corresponding side surface, and the identification line 320 coincides with the axis of the through hole 310 on itself along the direction perpendicular to the length of the gasket 3. Through the above technical solution, the utility model sets a scale line 132 on the side of the measuring part mounting seat 130 for easy observation, and since the diameters of the through hole 310 and the detection rod 220 are the same, the identification line 320 on the side of the gasket 3 aligned with the axis of the through hole 310 can accurately reflect the positional relationship of the detection rod 220.

[0045] In some embodiments, a groove A133 is provided on the upper end surface of the measuring part mounting seat 130 around the outer periphery of the socket 131, and a sealing ring A134 is provided in the groove A133. The sealing ring A134 abuts against the lower end surface of the gasket 3 for sealing. Through the above technical solution, the utility model uses the sealing ring A134 to strengthen the sealing effect between the gasket 3 and the measuring part mounting seat 130.

[0046] In some embodiments, a groove B211 is provided on the lower end surface of the mounting block 210 around the outer periphery of the detection rod 220, and a sealing ring B212 is provided in the groove B211. The sealing ring B212 abuts against the upper end surface of the gasket 3 for sealing. Therefore, this embodiment can enhance the sealing effect between the gasket 3 and the mounting block 210 through the sealing ring B212.

[0047] In some embodiments, the measuring part 2 may also include a circuit board body and a circuit board interface. The interior of the detection rod is hollow, and the circuit board body is sealed and fixed in the detection rod 220 by sealant. The inertial measurement unit 230 is welded on the circuit board body. The circuit board body is connected to the circuit board interface wire. A square opening is provided at the upper end of the detection rod 220 for wiring. The circuit board interface is led out to the outside through the square opening, and the data is output to the host computer for data processing.

[0048] In addition, two support bases are provided on the other side of the tube body 110 relative to the measuring portion mounting seat 130 . The two support bases can be integrally formed with the tube body 110 to assist in mounting the tube body 110 .

[0049] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vortex signal detection device with adjustable measuring position, characterized in that: It includes a vortex generating unit (1), a measuring unit (2) and a host computer. The vortex generating portion (1) comprises a tube body (110), a vortex generating column (120) and a measuring portion mounting seat (130); the tube body (110) can be mounted in series on a fluid medium pipeline; the vortex generating column (120) is fixedly mounted in the tube body (110) perpendicular to the axis of the tube body (110); the measuring portion mounting seat (130) is integrally formed with the outer wall of the tube body (110), and a long strip-shaped plug hole (131) along the axial direction of the tube body (110) is provided on the measuring portion mounting seat (130); the plug hole (131) is connected to the inside of the tube body (110), and the plug hole (131) is located behind the vortex generating column (120) along the direction of medium flow; The mounting end of the measuring part (2) is detachably connected to the measuring part mounting seat (130), and the measuring end is inserted into the interior of the tube body (110) through the jack (131) and the distance between the measuring end and the vortex generating column (120) can be adjusted along the length direction of the jack (131). The measuring end has an inertial measurement unit (230); and the host computer is electrically connected to the inertial measurement unit (230).

2. The vortex signal detection device with adjustable measuring position according to claim 1, characterized in that: The cross section of the vortex generating column (120) is an isosceles triangle, and the top of the isosceles triangle is arranged in front of the medium flow direction.

3. The vortex signal detection device with adjustable measuring position according to claim 1, characterized in that: The measuring part (2) comprises a mounting block (210) and a detection rod (220), wherein the mounting block (210) is detachably connected to the upper end surface of the measuring part mounting seat (130); one end of the detection rod (220) vertically passes through the mounting block (210) and is fixedly connected thereto, the diameter of the detection rod (220) is the same as the width of the insertion hole (131), the other end of the detection rod (220) passes through the insertion hole (131) and extends into the interior of the tube body (110), and the inertial measurement unit (230) is located at the other end of the detection rod (220).

4. The vortex signal detection device with adjustable measuring position according to claim 3, characterized in that: The invention also includes a group of replaceable gaskets (3), the lower end surface of each gasket (3) is adapted to the shape of the upper end surface of the measuring part mounting seat (130) and is detachably connected thereto, each gasket (3) is provided with a through hole (310) having the same outer diameter as the detection rod (220), the through hole (310) is connected to the insertion hole (131), and the through hole (310) on each gasket (3) has a different spacing from the vortex generating column (120) along the length direction of the insertion hole (131), the detection rod (220) can sequentially pass through the through hole (310) corresponding to the gasket (3) and the insertion hole (131) to extend into the tube body (110), and the lower end of the mounting block (210) is detachably connected to the upper end of the gasket (3).

5. The vortex signal detection device with adjustable measuring position according to claim 4, characterized in that: A scale line (132) is provided on one side surface of the measuring portion mounting seat (130) along the axial direction of the tube body (110), and each of the gaskets (3) is provided with an identification line (320) on the corresponding side surface, wherein the identification line (320) coincides with the axis of the through hole (310) along a direction perpendicular to the length of the gasket (3).

6. The vortex signal detection device with adjustable measuring position according to claim 4, characterized in that: A groove A (133) is provided on the upper end surface of the measuring portion mounting seat (130) and corresponds to the outer periphery of the insertion hole (131). A sealing ring A (134) is provided in the groove A (133). The sealing ring A (134) abuts against the lower end surface of the gasket (3) for sealing.

7. The vortex signal detection device with adjustable measuring position according to claim 4, characterized in that: A groove B (211) is provided on the lower end surface of the mounting block (210) and corresponds to the outer periphery of the detection rod (220). A sealing ring B (212) is provided in the groove B (211). The sealing ring B (212) abuts against the upper end surface of the gasket (3) to form a seal.

8. The vortex signal detection device with adjustable measuring position according to claim 3, characterized in that: The measuring part (2) further comprises a circuit board body and a circuit board interface, the detection rod (220) is hollow, the circuit board body and the circuit board interface are fixedly connected to the inner wall of the detection rod (220), the inertial measurement unit (230) is welded on the circuit board, the circuit board body is connected to the circuit board interface wire, and the circuit board interface is connected to the upper computer electrical signal.

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