Large-pipe-diameter flow measuring device
By using tensile lines and movable slider structures in the large pipe runoff measurement device, the measurement error problems caused by high pressure and temperature drift in the large pipe diameter pipeline are solved, and more accurate flow measurement is achieved.
Patent Information
- Application Number
- CN202421640081.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The pressure in large pipe diameter pipes is relatively high, which can easily lead to measurement errors of the flowmeter or damage to the sensor. In high or low temperature environments, temperature drift leads to inaccurate measurement results.
A large pipe runoff measurement device is designed, using a tension line and a movable slider structure, which slides on the outer periphery of the guide column through the movable slider, driving the tension line to move, and the tension is measured by the pull rope displacement sensor to achieve flow measurement.
The device has a stable and reliable structure, is not affected by the pressure in the large pipe diameter pipeline, adapts to fluids of various temperatures, has strong anti-interference ability, and improves the accuracy of flow measurement results.
Smart Images
Figure CN222800087U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flow measurement, in particular to a large-diameter flow measurement device. Background Art
[0002] In some modern factories, various fluids are transported in pipelines, including water, medicines, glue, beverages, etc. Depending on the application field of the fluid in the pipeline, the temperature of the fluid in the pipeline can be room temperature, high temperature or low temperature. In the factory production process, in many cases, it is necessary to measure the flow in the pipeline in order to achieve the purpose of accurate flow control, which requires the use of flow meters. There are many forms of flow meters. When measuring the liquid flow in a large-diameter pipeline, an insertion-type large-diameter flow meter with low cost and easy installation and maintenance is generally used.
[0003] However, due to the high pressure in large-diameter pipelines, the flow meter will be subjected to greater impact and pressure. The resistance strain gauge structure of the force sensor used in the insertion flow meter is relatively fragile and can be easily affected by overload or impact, resulting in sensor damage or inaccurate measurement results. On the other hand, when the pipeline liquid is at high or low temperature, the material of the sensor of the flow meter will expand and contract due to heat and cold in a high or low temperature environment, which is prone to temperature drift, resulting in errors in the measurement results of the force sensor and the flow value measured by the flow meter, which is not conducive to the precise control of the fluid. Utility Model Content
[0004] In order to solve the technical problem in the prior art that the pressure in large-diameter pipelines is relatively high, which will produce a large impact and pressure on the flow meter, easily leading to measurement errors or inaccurate measurement results, and is not conducive to precise control of the fluid, the utility model provides a new technical solution.
[0005] The utility model discloses a large-diameter flow measurement device, comprising a connecting flange connected to a pipeline and a connecting column connected to the connecting flange and provided with a sealing end, the upper end of the connecting column is connected to a sensor shell provided with a draw-wire displacement sensor, the upper end of the sensor shell is connected to a digital display provided with a meter rod, the lower part of the sealing end is fixedly connected to a fixing rod fixedly connected to the bottom of an inner cavity of the pipeline, one end of the fixing rod is fixedly connected to a guide column consistent with the axis of the pipeline, the guide column is slidably connected to a movable slider, a tension line is connected to a side of the movable slider close to the fixing rod, the upper end of the tension line passes through the mounting end and is connected to the draw-wire end of the draw-wire displacement sensor in the sensor shell, so as to measure the fluid tension exerted on the movable slider.
[0006] As a further technical solution, a plurality of guide cylinders for the tension wire to pass through are provided on the outer periphery of the fixing rod.
[0007] As a further technical solution, the outer peripheral surface of the guide column in the axial direction is provided with a plurality of slide grooves, and the movable sliding block is provided with a plurality of sliding parts matching the slide grooves.
[0008] As a further technical solution, a limiting end is provided at one end of the guide column away from the fixing rod.
[0009] As a further technical solution, a waterproof seal surrounding the tension line is provided in the sealing end.
[0010] As a further technical solution, the maximum stretching distance of the tension line is not greater than the distance between the movable slider and the limit end in the initial state.
[0011] As a further technical solution, the movable slider is a trapezoidal frustum mechanism, the bottom surface of which faces the flow direction of the fluid.
[0012] The beneficial effect of the utility model is that the movable slider connected with the tension wire slides on the outer periphery of the guide column. When the fluid in the pipeline contacts the movable slider, the movable slider will be pushed a distance along the direction of the fluid. The displacement of the movable slider drives the tension wire to move. The tension is measured by the pull rope displacement sensor. The fluid thrust on the movable slider and the tension on the tension wire reach a balance. The tension of the movable slider on the tension wire has a certain relationship with the flow rate of the fluid, which can be converted into the flow rate of the fluid, thereby measuring the fluid flow rate. The structure of the utility model is stable and reliable, is not affected by the pressure in the large-diameter pipeline, is suitable for fluids of various temperatures, is not limited by the density and viscosity of gas or liquid, has strong anti-interference ability, and improves the accuracy of the flow measurement results in large-diameter pipelines. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the overall structure of the large-diameter flow measurement device of the utility model;
[0014] Figure 2 This is a partial structural schematic diagram of the utility model large-diameter flow measurement device;
[0015] Figure 3 This is an enlarged schematic diagram of the guide column of the large-diameter flow measurement device of the utility model;
[0016] In the figure: 1-connecting flange; 2-connecting column; 201-sealing end; 3-sensor housing; 4-meter rod; 5-digital display; 6-fixing rod; 601-guide cylinder; 7-tension line; 8-guide column; 801-slide groove; 802-limiting end; 9-movable slider; 901-sliding part. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.
[0018] In the description of the present invention, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0019] like Figure 1 and Figure 2 As shown, the utility model is a large-diameter flow measurement device, which can be used to measure the fluid flow in a large-diameter pipeline of DN300 and above. It includes a connecting flange 1 connected to the pipeline, and the utility model is sealed and connected to the pipeline through the connecting flange 1. The connecting flange 1 is fixedly connected with a connecting column 2 that penetrates the connecting flange 1, that is, one end of the connecting column 2 is located at the upper part of the connecting flange 1, and the other end of the connecting column 2 is a sealing end 201, which is located at the lower part of the connecting flange 1. The connecting column 2 is a hollow column structure. The upper end of the connecting column 2 is connected to a sensor housing 3, and a drawstring displacement sensor is arranged in the sensor housing 3. The upper end of the sensor housing 3 is connected to a meter rod 4, and a digital display 5 is installed at the upper end of the meter rod 4. The signal end of the drawstring displacement sensor in the sensor housing 3 is connected upward to the digital display 5, and the drawstring end of the drawstring displacement sensor extends downward into the connecting column 2.
[0020] In a preferred embodiment, the lower part of the sealing end 201 is fixedly connected with a fixed rod 6, and the lower end of the fixed rod 6 is fixedly connected to the bottom of the inner cavity of the pipeline. One end of the fixed rod 6 is fixedly connected with a guide column 8, and the guide column 8 is located in front of the flow direction of the fluid. The fluid first passes through the fixed rod 6 and then contacts the guide column 8. The guide column 8 is preferably consistent with the axis of the pipeline. This is because when the fluid flows in a large diameter pipe, the flow velocity at the center of the pipeline is the most stable, which is convenient for measuring the driving force of the fluid. The guide column 8 is slidably connected with a movable slider 9. The shape of the movable slider 9 is not specifically limited. Preferably, the movable slider 9 is a trapezoidal frustum mechanism, and its bottom surface faces the flow direction of the fluid. Under the thrust of the fluid, the movable slider 9 can slide relative to the guide column 8. The side of the movable slider 9 close to the fixed rod 6 is connected with a tension wire 7. The tension wire 7 can be made of the same material as the tension wire end of the pull wire displacement sensor, that is, the tension wire 7 can be made of stainless steel with Teflon applied on the outside, so that the tension wire 7 can work in various high and low temperature and highly corrosive harsh environments. The tension wire 7 can be connected and fixed to the movable slider 9 by bolts or binding connections, and there is no special limitation on this.
[0021] The upper end of the tension wire 7 passes through the sealing end 201 and is connected to the pull-wire displacement sensor in the sensor housing 3. The pull-wire end of the pull-wire displacement sensor is connected to the upper end of the tension wire 7 in the connecting column 2. When the fluid in the pipeline contacts the movable slider 9, the movable slider 9 will be pushed a certain distance along the direction of the fluid. The displacement of the movable slider 9 under the pushing will drive the tension wire 7 to move. The tension on the tension wire 7 is measured by the pull-wire displacement sensor. The fluid thrust on the movable slider 9 and the tension on the tension wire 7 reach a balance. The tension of the movable slider 9 on the tension wire 7 has a certain relationship with the flow rate of the fluid, which can be converted into the flow rate of the fluid, thereby measuring the fluid flow rate.
[0022] In a preferred embodiment, a waterproof seal is provided in the sealing end 201 around the tension wire 7 to prevent the fluid in the pipeline from entering the sensor housing 3. Of course, a highly waterproof pull-wire displacement sensor is installed in the sensor housing 3, which has a secondary waterproof effect on the fluid. A plurality of guide cylinders 601 are provided on the outer periphery of the fixing rod 6 for the tension wire 7 to pass through. The guide cylinders 601 guide the movement of the tension wire 7 to prevent the tension wire 7 from moving randomly in the pipeline.
[0023] In a preferred embodiment, the outer peripheral surface of the guide column 8 in the axial direction is provided with a plurality of slide grooves 801. In this embodiment, there are three slide grooves 801, which are evenly arranged on the outer periphery of the guide column 8. The movable slider 9 is provided with three sliding parts 901 matching the slide grooves 801, so that the movable slider 9 can stably slide axially on the guide column 8, preventing the radial sliding of the movable slider 9 from generating radial torque on the tension line 7, thereby improving the accuracy of the pull rope displacement sensor in measuring the tension on the tension line 7. A limit end 802 is provided at one end of the guide column 8 away from the fixed rod 6, and the maximum stretching distance of the tension line 7 is not greater than the distance between the movable slider 9 and the limit end 802 in the initial state, so as to prevent the movable slider 9 from touching the limit end 802 and causing adverse effects on the measurement results.
[0024] The principle of the utility model is as follows: when the fluid in the pipeline contacts the movable slider 9, the movable slider 9 will be pushed a certain distance along the direction of the fluid, and the movable slider 9 slides on the outer periphery of the guide column 8. The displacement of the movable slider 9 drives the tension line 7 to move, and the tension is measured by the pull rope displacement sensor. The fluid thrust exerted on the movable slider 9 and the tension exerted on the tension line 7 reach a balance. The tension exerted by the movable slider 9 on the tension line 7 has a certain relationship with the flow velocity of the fluid, which can be converted into the flow velocity of the fluid, thereby measuring the fluid flow rate.
[0025] The preferred specific implementation modes and embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above implementation modes and embodiments, and various changes or equivalent substitutions can be made within the knowledge scope of those skilled in the art without departing from the concept of the utility model. Therefore, the utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the utility model.
Claims
1. A large-diameter flow measurement device, comprising a connecting flange (1) connected to a pipeline and a connecting column (2) connected to the connecting flange (1) and provided with a sealing end (201), characterized in that: The upper end of the connecting column (2) is connected to a sensor shell (3) in which a pull-wire displacement sensor is installed, and the upper end of the sensor shell (3) is connected to a digital display (5) provided with a meter rod (4). The lower part of the sealing end (201) is fixedly connected to a fixing rod (6) fixedly connected to the bottom of the inner cavity of the pipeline, and one end of the fixing rod (6) is fixedly connected to a guide column (8) consistent with the axis of the pipeline, and the guide column (8) is slidably connected to a movable slider (9). The movable slider (9) is connected to a tension line (7) on one side close to the fixing rod (6). The upper end of the tension line (7) passes through the connecting column (2) and is connected to the pull wire end of the pull-wire displacement sensor in the sensor shell (3), so as to measure the fluid tension exerted on the movable slider (9).
2. The large-diameter flow measurement device according to claim 1, characterized in that: The outer periphery of the fixing rod (6) is provided with a plurality of guide cylinders (601) for the tension wire (7) to pass through.
3. The large-diameter flow measurement device according to claim 1, characterized in that: The outer peripheral surface of the guide column (8) in the axial direction is provided with a plurality of slide grooves (801), and the movable sliding block (9) is provided with a plurality of sliding parts (901) matching the slide grooves (801).
4. The large-diameter flow measurement device according to claim 1, characterized in that: The guide column (8) is provided with a limiting end (802) at one end away from the fixing rod (6).
5. The large-diameter flow measurement device according to claim 1, characterized in that: A waterproof seal surrounding the tension line (7) is provided inside the sealing end (201).
6. The large-diameter flow measurement device according to claim 4, characterized in that: The maximum stretching distance of the tension line (7) is no greater than the distance between the movable slider (9) and the limiting end (802) in the initial state.
7. The large-diameter flow measurement device according to claim 1, characterized in that: The movable sliding block (9) is a trapezoidal frustum structure, and its bottom surface faces the flow direction of the fluid.