vortex flowmeter

Abstract

The utility model relates to flowmeter technical field especially vortex flowmeter, including converter and sensor, converter is connected with sensor through connecting rod, connecting rod is connected with converter through screw thread, sensor is connected with connecting rod through connecting assembly, first flange is equipped on the sensor, second flange is equipped on the connecting rod, connecting assembly includes sleeve, upper end cover, lower end cover and two groups of disc spring, sleeve is sheathed outside first flange and second flane simultaneously, first flange and second flange are clamped between upper end cover and lower end cover, upper end cover and lower end cover are respectively connected with sleeve outer wall screw thread from the both ends of sleeve, one group of disc spring is arranged between sleeve and first flange abutting, another group of disc spring is arranged between sleeve and second flange abutting, and two groups of disc spring abut along the axial direction, the utility model utilizes the elastic deformation characteristics of disc spring and absorbs and buffers the energy that fluid vibration produces, thereby significantly reduces the loosening tendency of connecting piece such as screw thread connection.

Description

Technical Field

[0001] This utility model relates to the field of flow meter technology, and in particular to a vortex flow meter. Background Technology

[0002] A vortex flow meter, generally referring to a vortex flow meter, is a flow measurement instrument based on the principle of fluid vibration. It is mainly used for monitoring the volume and mass flow of gas, steam, or liquid, and is widely used in industries such as petroleum, chemical, natural gas transportation, and power. Its working principle involves the Karman vortex street effect or vortex precession frequency detection, and calculates the flow rate by measuring the vortex frequency generated by the fluid passing through a specific structure.

[0003] Existing vortex flow meters typically use bolts to fix the converter and sensor together. Because the medium flows rapidly inside the sensor and generates vibration, the bolts are prone to loosening under the influence of vibration, which leads to a loose connection between the converter and the sensor, causing deflection or tilting. Because the orientation of the display screen on the converter changes, it will also affect the observation of the detection data on the converter.

[0004] The purpose of this invention is to propose corresponding solutions to the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a vortex flow meter. This invention utilizes the elastic deformation characteristics of disc springs to absorb and buffer the energy generated by fluid vibration, thereby significantly reducing the tendency of connecting parts, such as threaded connections, to loosen.

[0006] The technical solution adopted by this utility model is as follows: a vortex flowmeter, including a converter and a sensor. The converter is connected to the sensor via a connecting rod, and the connecting rod is threaded to the converter. The sensor is connected to the connecting rod via a connecting assembly. The sensor is provided with a first flange, and the connecting rod is provided with a second flange. The connecting assembly includes a sleeve, an upper end cover, a lower end cover, and two sets of disc springs. The sleeve is simultaneously sleeved on the outside of the first and second flanges. The first and second flanges are sandwiched between the upper and lower end covers. The upper and lower end covers are threaded to the outer wall of the sleeve from both ends. One set of disc springs is abutted between the sleeve and the first flange, and the other set of disc springs is abutted between the sleeve and the second flange, with the two sets of disc springs abutting against each other axially.

[0007] The connecting assembly also includes a cylindrical pin. The mating surfaces of the first flange and the second flange are respectively provided with a half groove. The two half grooves form a countersunk hole for the cylindrical pin to be inserted. One end of the cylindrical pin passes through the sleeve and the other end is inserted into the countersunk hole.

[0008] The cylindrical pin has an annular groove in the middle, and the inner edges of both sets of disc springs are embedded in the annular groove. The outer edge of one set of disc springs simultaneously abuts against the sleeve and the upper end cover, while the outer edge of the other set of disc springs simultaneously abuts against the sleeve and the lower end cover. When the upper end cover or the lower end cover is separated from the sleeve, the corresponding disc spring resets and its outer edge extends to the outside of the sleeve.

[0009] The inner wall of the annular groove near the countersunk hole is provided with an inclined surface that matches the inner wall of the disc spring, and the inclined surface forms an acute angle with the inner bottom wall of the annular groove.

[0010] The inner wall of the annular groove at the end away from the counterbore is provided with an arc surface, and the arc surface forms an obtuse angle with the inner bottom wall of the annular groove.

[0011] The connecting assembly also includes two abutment rings, which are respectively sandwiched between the first flange and one set of disc springs and between the second flange and the other set of disc springs.

[0012] The countersunk hole can be a square hole or a round hole, and the inner diameter or inner width of the countersunk hole is the same as the diameter of the cylindrical pin.

[0013] The beneficial effects of this utility model are as follows: This utility model, by setting a connecting assembly, includes a sleeve, an upper end cover, a lower end cover, and two sets of disc springs, wherein the disc springs abut against the sleeve and the first flange, and the sleeve and the second flange respectively, and the two sets of disc springs abut against each other axially. This structure utilizes the elastic deformation characteristics of the disc springs to absorb and buffer the energy generated by fluid vibration, thereby significantly reducing the tendency of connecting parts such as threaded connections to loosen, ensuring the firmness of the connection between the converter and the sensor, and avoiding connection failure due to vibration. Since the connecting assembly clamps the first flange and the second flange between the upper end cover and the lower end cover, and fixes them with the sleeve outer sleeve, forming an axial constraint, and at the same time, the preload of the disc springs can compensate for installation gaps and vibration displacement. This keeps the relative position between the sensor and the connecting rod stable, effectively preventing the converter from deflecting or tilting due to vibration. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0015] Figure 1 This is a schematic diagram of the structure of the vortex flowmeter of this utility model; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; In the diagram, 1-converter, 2-sensor, 3-connecting rod, 4-first flange, 5-second flange, 6-sleeve, 7-upper end cover, 8-lower end cover, 9-disc spring, 10-cylindrical pin, 11-half groove, 12-countersunk hole, 13-annular groove, 14-inclined surface, 15-arc surface, 16-abutment ring. Detailed Implementation

[0016] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0017] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0018] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0019] like Figures 1 to 2 As shown in the figure, a vortex flowmeter of the present invention includes a converter 1 and a sensor 2. The converter 1 is connected to the sensor 2 via a connecting rod 3, and the connecting rod 3 is threadedly connected to the converter 1. The sensor 2 is connected to the connecting rod 3 via a connecting assembly. The sensor 2 is provided with a first flange 4, and the connecting rod 3 is provided with a second flange 5. The connecting assembly includes a sleeve 6, an upper end cover 7, a lower end cover 8, and two sets of disc springs 9. The sleeve 6 is simultaneously sleeved on the outside of the first flange 4 and the second flange 5. The first flange 4 and the second flange 5 are sandwiched between the upper end cover 7 and the lower end cover 8. The upper end cover 7 and the lower end cover 8 are respectively threadedly connected to the outer wall of the sleeve 6 from both ends. One set of disc springs 9 is abutted between the sleeve 6 and the first flange 4, and the other set of disc springs 9 is abutted between the sleeve 6 and the second flange 5, and the two sets of disc springs 9 abut against each other axially.

[0020] The beneficial effects of this design are as follows: This utility model, through the setting of a connecting assembly, includes a sleeve, an upper end cover, a lower end cover, and two sets of disc springs. The disc springs abut against the sleeve and the first flange, and the sleeve and the second flange, respectively, with the two sets of disc springs abutting against each other axially. This structure utilizes the elastic deformation characteristics of the disc springs to absorb and buffer the energy generated by fluid vibration, thereby significantly reducing the tendency of connecting parts, such as threaded connections, to loosen, ensuring the robustness of the connection between the converter and the sensor, and avoiding connection failure due to vibration. Since the connecting assembly clamps the first and second flanges between the upper and lower end covers and fixes them with the sleeve outer sleeve, forming an axial constraint, and the preload of the disc springs can compensate for installation gaps and vibration displacement, this keeps the relative position between the sensor and the connecting rod stable, effectively preventing the converter from deflecting or tilting due to vibration. The second flange and the sensor can be connected by methods such as welding or threaded connection; any split structure is acceptable, facilitating the initial fitting of the lower end cover onto the sensor.

[0021] In a further configuration, the connecting assembly also includes a cylindrical pin 10. The mating surfaces of the first flange 4 and the second flange 5 are respectively provided with a half groove 11. The two half grooves 11 form a countersunk hole 12 for the cylindrical pin 10 to be inserted. One end of the cylindrical pin 10 passes through the sleeve 6 and the other end is inserted into the countersunk hole 12.

[0022] The beneficial effects of this design are as follows: By creating a countersunk hole by opening a semi-groove on the mating surface of the first and second flanges, the cylindrical pin can be simultaneously inserted into the countersunk hole and penetrate the sleeve. This structure provides precise circumferential positioning constraints for the first and second flanges, fundamentally preventing relative rotation or circumferential displacement between the sensor and the connecting rod due to vibration or external forces, ensuring connection alignment. This cylindrical pin structure works in conjunction with the axially arranged disc spring assembly to form an optimized mechanical model. The disc springs mainly absorb and buffer radial vibration, while the cylindrical pin is responsible for resisting circumferential displacement. The upper and lower end caps are responsible for limiting axial displacement, locking the two flanges in all directions. This ensures an absolutely reliable and non-deflecting connection while maintaining vibration buffering capacity, significantly improving overall performance.

[0023] Further, the cylindrical pin 10 has an annular groove 13 in the middle, and the inner edges of the two sets of disc springs 9 are embedded in the annular groove 13. The outer edge of one set of disc springs 9 simultaneously abuts against the sleeve 6 and the upper end cover 7, and the outer edge of the other set of disc springs 9 simultaneously abuts against the sleeve 6 and the lower end cover 8. When the upper end cover 7 or the lower end cover 8 is separated from the sleeve 6, the corresponding disc spring 9 resets and its outer edge extends to the outside of the sleeve 6.

[0024] The beneficial effects of this design are as follows: when the disc spring is compressed and deformed, the disc spring provides an axial inward thrust to the cylindrical pin by embedding in the annular groove, so that the cylindrical pin can maintain its insertion into the countersunk hole. The simultaneous embedding of two disc springs in the annular groove ensures uniform force application. The annular groove can also provide a reliable radial positioning reference for the disc spring. Furthermore, the two disc springs are compressed and deformed by the upper end cover and the lower end cover respectively. The disc spring can also exert a reaction force on the upper end cover and the lower end cover. The threaded connection between the upper end cover and the lower end cover and the sleeve can also be tighter and less prone to loosening.

[0025] Furthermore, the inner wall of the annular groove 13 near the countersunk hole 12 is provided with an inclined surface 14 that is adapted to the inner wall of the disc spring 9, and the inclined surface 14 and the inner bottom wall of the annular groove 13 form an acute angle.

[0026] The beneficial effects of this design are as follows: the inclined surface increases the contact area between the cylindrical pin and the disc spring, ensuring effective force transmission and preventing the disc spring from slipping out of the annular groove when compressed.

[0027] As a further feature, the inner wall of the end of the annular groove 13 away from the counterbore 12 is provided with an arc surface 15, and the arc surface 15 forms an obtuse angle with the inner bottom wall of the annular groove 13.

[0028] The beneficial effects of this design are as follows: the curved surface guides the disc spring, allowing it to quickly slide into the annular groove along the curved surface during the compression process, and finally fit against the inclined surface.

[0029] Furthermore, the connecting assembly also includes two abutment rings 16, which are respectively sandwiched between the first flange 4 and one set of disc springs 9 and between the second flange 5 and the other set of disc springs 9.

[0030] The beneficial effects of this design are as follows: the inner side of the disc spring is supported by the abutment ring, which prevents the disc spring from slipping or deforming in the opposite direction, providing a stable support and limiting effect. The abutment ring can also apply pressure to the disc spring during the compression process, helping the disc spring to compress and deform quickly.

[0031] Further, the countersunk hole 12 can be a square hole or a circular hole, and the inner diameter or inner width of the countersunk hole 12 is the same as the diameter of the cylindrical pin 10.

[0032] The beneficial effects of this design are as follows: either square or round holes can be used for the countersunk hole, as long as the inner wall of the countersunk hole and the outer wall of the cylindrical pin can fit together. The cylindrical pin can then provide radial restraint for the flange, preventing relative rotation or circumferential displacement of the two flanges.

[0033] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A vortex flow meter, comprising a converter (1) and a sensor (2), characterized in that: The converter (1) is connected to the sensor (2) via a connecting rod (3). The connecting rod (3) is connected to the converter (1) via a thread. The sensor (2) is connected to the connecting rod (3) via a connecting assembly. The sensor (2) is provided with a first flange (4). The connecting rod (3) is provided with a second flange (5). The connecting assembly includes a sleeve (6), an upper end cover (7), a lower end cover (8), and two sets of disc springs (9). The sleeve (6) is simultaneously sleeved on the outside of the first flange (4) and the second flange (5). The first flange (4) and the second flange (5) are sandwiched between the upper end cover (7) and the lower end cover (8). The upper end cover (7) and the lower end cover (8) are respectively threaded to the outer wall of the sleeve (6) from both ends. One set of disc springs (9) is abutted between the sleeve (6) and the first flange (4). The other set of disc springs (9) is abutted between the sleeve (6) and the second flange (5). The two sets of disc springs (9) abut against each other along the axial direction.

2. The vortex flowmeter according to claim 1, characterized in that: The connecting assembly also includes a cylindrical pin (10). The mating surfaces of the first flange (4) and the second flange (5) are respectively provided with a half groove (11). The two half grooves (11) form a countersunk hole (12) for the cylindrical pin (10) to be inserted. One end of the cylindrical pin (10) passes through the sleeve (6) and the other end is inserted into the countersunk hole (12).

3. The vortex flowmeter according to claim 2, characterized in that: The cylindrical pin (10) has an annular groove (13) in the middle. The inner edges of the two sets of disc springs (9) are embedded in the annular groove (13). The outer edge of one set of disc springs (9) simultaneously abuts against the sleeve (6) and the upper end cover (7), while the outer edge of the other set of disc springs (9) simultaneously abuts against the sleeve (6) and the lower end cover (8). When the upper end cover (7) or the lower end cover (8) separates from the sleeve (6), the corresponding disc spring (9) resets and its outer edge extends to the outside of the sleeve (6).

4. The vortex flowmeter according to claim 3, characterized in that: The inner wall of the annular groove (13) near the countersunk hole (12) is provided with an inclined surface (14) that is adapted to the inner wall of the disc spring (9), and the inclined surface (14) and the inner bottom wall of the annular groove (13) form an acute angle.

5. The vortex flowmeter according to claim 3, characterized in that: The inner wall of the end of the annular groove (13) away from the countersunk hole (12) is provided with an arc surface (15), and the arc surface (15) and the inner bottom wall of the annular groove (13) form an obtuse angle.

6. The vortex flowmeter according to claim 3, characterized in that: The connecting assembly also includes two abutment rings (16), which are respectively sandwiched between the first flange (4) and one set of disc springs (9) and between the second flange (5) and another set of disc springs (9).

7. The vortex flowmeter according to claim 2, characterized in that: The countersunk hole (12) can be a square hole or a round hole, and the inner diameter or inner width of the countersunk hole (12) is the same as the diameter of the cylindrical pin (10).

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