Orifice plate flowmeter throttling device

Abstract

The orifice plate flowmeter throttling device comprises a flowmeter assembly, a flowmeter orifice plate is arranged at the lower end of the flowmeter assembly, and the left side of the flowmeter orifice plate is sequentially connected with a pulsation restraining mechanism and a buffering mechanism. The pulsation suppression mechanism comprises a corrugated buffer tube, the left end of the corrugated buffer tube is connected with the buffer mechanism through a first flange, and the right end is connected with the flowmeter orifice plate through a second flange; the buffering mechanism comprises a first buffering pipe cavity and a second buffering pipe cavity, a rotating seat is arranged in the first buffering pipe cavity, a bullet head is fixed to the left end of the rotating seat, a spiral flow guide piece is installed on the surface of the rotating seat, the first buffering pipe cavity is coaxially connected with the second buffering pipe cavity, and a honeycomb flow guide plate is arranged in the second buffering pipe cavity. According to the orifice plate flowmeter throttling device, through the dual effects of flow field reconstruction of the buffer mechanism and dynamic damping of the pulsation suppression mechanism, the measurement repeatability error of an orifice plate flowmeter under the pulsating flow working condition is greatly reduced, and the pressure deviation rate is effectively controlled.

Description

Technical Field

[0001] This utility model relates to the field of orifice plate flow meter technology, specifically an orifice plate flow meter throttling device. Background Technology

[0002] An orifice plate flow meter is a flow measurement device based on the differential pressure principle. It is created by installing a throttling orifice plate with a central circular hole in a pipeline. When fluid flows through the orifice plate, a pressure difference is generated before and after it. This pressure difference is proportional to the square of the fluid velocity. The flow rate can be calculated by combining parameters such as the cross-sectional area of ​​the pipeline and the fluid density. It has a simple structure, low cost, and high reliability. It mainly consists of an orifice plate body, a pressure tapping device, a differential pressure transmitter, and a flow calculation unit. It is suitable for measuring the flow of liquids, gases, and steam. However, it has the characteristics of large permanent pressure loss, strict installation requirements, limited range ratio, and measurement accuracy affected by changes in fluid properties. It is often used in industrial process control environments where the accuracy requirements are not stringent, the medium is clean, and the flow rate is stable.

[0003] Based on existing orifice plate flowmeter throttling devices, it has been found that these devices are easily affected by airflow pulsation and pressure deviation during application. Sudden changes in flow velocity or pressure in the pipeline (such as pulsating flow) can disrupt the stable measurement principle of the throttling device, leading to instantaneous errors. Therefore, this invention designs an orifice plate flowmeter throttling device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a throttling device for an orifice plate flowmeter to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flow meter throttling device includes a flow meter assembly. A flow meter orifice plate is disposed at the lower end of the flow meter assembly. A pulsation suppression mechanism and a buffer mechanism are sequentially connected to the left side of the flow meter orifice plate. The pulsation suppression mechanism includes a corrugated buffer tube. The left end of the corrugated buffer tube is connected to the buffer mechanism via a first flange, and the right end is connected to the flow meter orifice plate via a second flange. The buffer mechanism includes a first buffer cavity and a second buffer cavity. A rotating seat is disposed within the first buffer cavity. A bullet-shaped head is fixed to the left end of the rotating seat, and a spiral guide vane is mounted on its surface.

[0007] Optionally, the first buffer cavity and the second buffer cavity are coaxially connected, and the second buffer cavity is provided with a honeycomb guide plate.

[0008] Optionally, the right end of the rotating seat is connected to a mounting plate via a bearing seat, and the mounting plate is fixed to the inner wall of the first buffer cavity via a fixing rod.

[0009] Optionally, the edges of the mounting plate are rounded.

[0010] Optionally, the spiral guide vane has a three-blade structure, with the blades evenly distributed around the circumference of the rotating seat.

[0011] Optionally, a first mating plate is provided on the left side of the first flange, and the first mating plate is fixed to the right end of the second buffer cavity.

[0012] Optionally, a second mating plate is provided on the right side of the second flange, and the second mating plate is fixed to the left end of the flow meter orifice plate.

[0013] Optionally, the inner cavity of the corrugated buffer tube has a continuous corrugated structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, a buffer mechanism is provided. The buffer mechanism reduces the intensity of fluid turbulence significantly through the synergistic effect of the spiral guide vane and the honeycomb guide plate. The bearing support structure of the rotating seat ensures the long-term stable operation of the guide vane.

[0016] 2. In this utility model, a pulsation suppression mechanism is provided. The pulsation suppression mechanism can effectively absorb the pressure fluctuation energy through the dynamic deformation characteristics of the corrugated buffer tube, and the pulsation amplitude is greatly attenuated. In addition, the modular design of the first flange and the second flange facilitates maintenance and replacement. Attached Figure Description

[0017] Figure 1 This is a three-dimensional front view structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model from a frontal view.

[0019] Figure 3 This is a three-dimensional top view of the structure of this utility model;

[0020] Figure 4 This is a three-dimensional, bottom-view structural diagram of the present invention;

[0021] Figure 5 This is a top view of the structure of this utility model;

[0022] Figure 6 This is a three-dimensional sectional view of the structure of this utility model. Figure 1 ;

[0023] Figure 7 This is a three-dimensional sectional view of the structure of this utility model. Figure 2 ;

[0024] Figure 8 This utility model Figure 6 A magnified three-dimensional structural diagram of point A in the middle.

[0025] In the figure: 1. Flow meter assembly; 2. Flow meter orifice plate; 3. Buffer mechanism; 301. First buffer cavity; 302. Second buffer cavity; 303. Rotary seat; 304. Bullet head; 305. Spiral guide vane; 306. Bearing seat; 307. Mounting plate; 308. Fixing rod; 309. Honeycomb guide plate; 4. Pulsation suppression mechanism; 401. Corrugated buffer tube; 402. First flange; 403. Second flange; 404. First mating plate; 405. Second mating plate. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-8In this embodiment of the present invention, a flow meter throttling device includes a flow meter assembly 1, and a flow meter orifice plate 2 is provided at the lower end of the flow meter assembly 1. The device is characterized in that: a pulsation suppression mechanism 4 and a buffer mechanism 3 are connected sequentially on the left side of the flow meter orifice plate 2; the pulsation suppression mechanism 4 includes a corrugated buffer tube 401, the left end of which is connected to the buffer mechanism 3 through a first flange 402, and the right end of which is connected to the flow meter orifice plate 2 through a second flange 403; the buffer mechanism 3 includes a first buffer cavity 301 and a second buffer cavity 302, a rotating seat 303 is provided in the first buffer cavity 301, a bullet head 304 is fixed at the left end of the rotating seat 303, and a spiral guide vane 305 is installed on the surface; the first buffer cavity 301 and the second buffer cavity 302 are coaxially connected, and a honeycomb guide plate 309 is provided in the second buffer cavity 302.

[0030] The inner diameters of the first buffer cavity 301 and the second buffer cavity 302 are matched with the standard pipe diameter. The rotating seat 303 fixes the bullet head 304 with an interference fit, and three spiral guide vanes 305 are evenly distributed on its surface. The bearing seat 306 uses a ceramic bearing and is connected to the cavity wall through the rounded edge of the mounting plate 307 and the fixing rod 308.

[0031] The corrugated buffer pipe 401 adopts a multi-layer corrugated structure. The first flange 402 and the second flange 403 are respectively connected to the first mating plate 404 and the second mating plate 405 by bolts, and a 2mm thick fluororubber sealing gasket is provided on the mating surface.

[0032] When the high-pressure pulsating fluid enters the first buffer tube 301, the bullet head 304 diverts the fluid, causing it to uniformly contact the spiral guide vane 305 and forcibly forming a rotating flow field. After secondary rectification by the honeycomb guide plate 309, the fluid enters the corrugated buffer tube 401, where its corrugated structure absorbs the pressure fluctuation energy through elastic deformation, ultimately allowing the stable fluid to pass through the flow meter orifice plate 2 for measurement.

[0033] The working principle of this invention is as follows: When fluid containing pulsating interference enters the device, it first passes through the first buffer cavity 301 of the buffer mechanism 3. After impacting the bullet head 304, the fluid forms a rotating flow field along the spiral guide vane 305 (the rotating seat 303 achieves low-friction rotation through the bearing seat 306). The three-bladed spiral guide vane 305 forces the fluid to generate a stable vortex. Subsequently, when flowing through the second buffer cavity 302, the hexagonal honeycomb structure of the honeycomb guide plate 309 decomposes the large-scale vortex into micro-scale flow, realizing the dissipation of turbulent kinetic energy. After the fluid has been initially stabilized, it enters the pulsation suppression mechanism 4. The corrugated buffer tube 401 undergoes axial deformation through its elastic corrugated structure: when the fluid pressure increases, the corrugated tube compresses and absorbs energy; when the pressure decreases, the corrugated tube rebounds and releases energy. The first flange 402 and the second flange 403 are sealed together through the first mating plate 404 and the second mating plate 405, ultimately allowing the stable fluid to pass through the flow meter orifice plate 2 for accurate measurement. The rounded corner design of the mounting plate 307 and the rigid support of the fixing rod 308 together ensure the structural stability of the internal flow channel.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An orifice plate flowmeter restriction device comprising a flowmeter assembly (1) provided with a flowmeter orifice plate (2) at its lower end, characterised in that: The left side of the flowmeter orifice plate (2) is sequentially connected with the pulsation suppression mechanism (4) and the buffer mechanism (3); the pulsation suppression mechanism (4) comprises a corrugated buffer pipe (401), the left end of the corrugated buffer pipe (401) is connected with the buffer mechanism (3) through a first flange plate (402), and the right end is connected with the flowmeter orifice plate (2) through a second flange plate (403); the buffer mechanism (3) comprises a first buffer pipe cavity (301) and a second buffer pipe cavity (302), a rotating seat (303) is arranged in the first buffer pipe cavity (301), a bullet head (304) is fixed to the left end of the rotating seat (303), and a spiral guide vane (305) is mounted on the surface of the rotating seat (303).

2. An orifice plate flowmeter restriction device according to claim 1, wherein: The first buffer pipe cavity (301) and the second buffer pipe cavity (302) are coaxially connected, and a honeycomb guide plate (309) is arranged in the second buffer pipe cavity (302).

3. An orifice plate flowmeter restriction device according to claim 1, wherein: The right end of the rotating seat (303) is connected with a mounting plate (307) through a bearing seat (306), and the mounting plate (307) is fixed to the inner wall of the first buffer pipe cavity (301) through a fixing rod (308).

4. An orifice plate flowmeter restriction device according to claim 3, wherein: The edge of the mounting plate (307) adopts a round corner transition structure.

5. An orifice plate flowmeter restriction device according to claim 1, wherein: The spiral guide vane (305) is a three-blade structure, and is distributed at equal angles around the rotating seat (303).

6. An orifice plate flow meter restriction device according to claim 1, wherein: The left side of the first flange plate (402) is provided with a first butt joint plate (404), and the first butt joint plate (404) is fixed to the right end of the second buffer pipe cavity (302).

7. An orifice plate flow meter restriction device according to claim 1, wherein: The right side of the second flange plate (403) is provided with a second butt joint plate (405), and the second butt joint plate (405) is fixed to the left end of the flowmeter orifice plate (2).

8. An orifice plate flow meter restriction device according to claim 1, wherein: The inner cavity of the corrugated buffer pipe (401) is a continuous corrugated structure.

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