High precision modularized balanced flowmeter

Abstract

This utility model discloses a high-precision modular balanced flow meter, including a throttling element and a temperature sensor. The throttling element includes an orifice plate and flanges located on both sides of the orifice plate. The throttling element is installed on the pipeline through the flanges. A central hole is opened in the center of the orifice plate, and multiple small holes are evenly spaced around the central hole. The diameter ratio of the small holes to the central hole is 0.4-0.6. The thickness of the throttling element is ≥5mm. The throttling element is connected to a three-valve manifold through a pipe. The three-valve manifold is connected to a differential pressure transmitter. The differential pressure transmitter is connected to a DCS control system. The DCS control system is connected to a temperature sensor, which is installed on the outer wall of the pipeline. The balanced flow meter designed in this application reduces pressure loss to 0.2kPa, reduces clogging failures by 80% due to its self-cleaning structure, and synchronously acquires and inputs the temperature and pressure compensation algorithm module of the DCS control system with the temperature sensor and differential pressure signal. The overall accuracy reaches ±0.3%, and the real-time performance is strong.

Description

Technical Field

[0001] This utility model belongs to the field of industrial flow measurement technology, specifically relating to a high-precision modular balanced flow meter. Background Technology

[0002] A balanced flow meter is a differential pressure flow instrument that combines a traditional orifice plate with a rectifier through a "multi-hole disc throttling rectifier." While retaining the differential pressure principle, it achieves flow field balance, minimizes eddies, reduces pressure loss, and improves accuracy. The paper industry uses balanced flow meters to monitor liquid flow rates in wastewater treatment and pulp usage. Liquid flow rates are high annually, and traditional balanced flow meters suffer from significant pressure loss (approximately one-third of that of an orifice plate), require high straight pipe sections (10D upstream and 5D downstream), and are prone to clogging due to media contamination. Furthermore, in existing designs, the temperature compensation module is often externally located on the transmitter, causing signal delay and affecting the real-time performance of flow calculations. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model proposes a high-precision modular balanced flow meter.

[0004] The technical solution adopted in this utility model is a high-precision modular balanced flow meter, including a throttling element and a temperature sensor. The throttling element includes an orifice plate and flanges located on both sides of the orifice plate. The throttling element is installed on the pipeline through the flanges. A central hole is opened in the center of the orifice plate, and multiple small holes are evenly spaced around the central hole. The diameter ratio of the small holes to the central hole is 0.4-0.6. The thickness of the throttling element is ≥5mm. The throttling element is connected to a three-valve manifold through a pipe. The three-valve manifold is connected to a differential pressure transmitter. The differential pressure transmitter is connected to a DCS control system. The DCS control system is connected to a temperature sensor, which is installed on the outer wall of the pipeline.

[0005] Furthermore, the diameter of the central hole is twice the diameter of the small hole, and the hole spacing is 1.5 times the diameter of the small hole.

[0006] Furthermore, the temperature sensor mentioned above is a miniature platinum resistance temperature sensor, and a temperature transmitter is installed between the temperature sensor and the DCS control system to convert the temperature signal into a 4-20mA current signal and send it to the DCS control system.

[0007] Furthermore, a condenser is also installed on the pipeline between the aforementioned throttling device and the three-valve manifold.

[0008] Furthermore, a pressure transmitter is connected to the pipeline between the throttling device and the temperature transmitter via a pressure guide pipe, and the pressure transmitter is connected to the DCS control system.

[0009] Furthermore, the aforementioned temperature sensor is embedded in the pipe flange via an M16 thread, with a distance of ≤2D from the differential pressure tap, where D is the pipe diameter.

[0010] Compared with existing technologies, the beneficial effects of this utility model are as follows: After installation, the effective pressure loss of the balanced flow meter designed in this application is reduced to 0.2 kPa (DN50 pipeline), saving approximately RMB 12,000 in energy costs annually (based on 10 units / year). It can measure fluids with viscosities from 1 to 1000 cP, supports extreme operating conditions from -196℃ to 850℃, and its self-cleaning structure reduces clogging failures by 80%. The temperature sensor and differential pressure signal are synchronously acquired and input into the temperature and pressure compensation algorithm module of the DCS control system, achieving a comprehensive accuracy of ±0.3%. The range ratio is extended to 50:1, and it supports Reynolds numbers from 200 to 10. 7 It has strong real-time performance. Attached Figure Description

[0011] Figure 1 Schematic diagram of the assembly of a high-precision modular balanced flow meter; Figure 2 This is a schematic diagram of the throttling device structure; Figure 3 This is a block diagram of the temperature and pressure compensation module circuit. Detailed Implementation

[0012] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.

[0013] Example 1 like Figure 1-3 As shown, a high-precision modular balanced flow meter includes a throttling element 1 and a temperature sensor 2. The throttling element 1 is 3D printed from 316L stainless steel and includes an orifice plate 11 and flanges 12 located on both sides of the orifice plate 11. The throttling element 1 is installed on the pipe 3 through the flanges 12. The flanges are equipped with a spring sealing ring and a rotary speed regulating ring structure, which supports online disassembly and cleaning and viscosity adaptive adjustment. After the pipe flanges are aligned, the throttling element is inserted and rotated 15° to lock it. It is fixed by quick-release bolts, which takes ≤15 minutes (traditional installation takes 2 hours). The orifice plate 11 has a central hole 110 in the center, and multiple small holes 111 are evenly spaced around the central hole 110. The diameter ratio of the small holes 111 to the central hole 110 is 0.4-0.6. The thickness of the throttling element 1 is ≥5mm. The throttling element 1 is connected to a three-valve manifold 3 through a pipe. The three-valve manifold 3 is connected to a differential pressure transmitter 4. The differential pressure transmitter 4 is connected to a DCS control system 5. The DCS control system 5 is connected to the temperature sensor 2, which is installed on the outer wall of the pipe.

[0014] Specifically, the diameter of the central hole 110 is twice the diameter of the small hole, and the hole spacing is 1.5 times the diameter of the small hole. In this embodiment, the central hole is Φ15mm and the small hole is Φ7.5mm.

[0015] Temperature sensor 2 is a miniature platinum resistance temperature sensor. It is embedded in the pipe flange via an M16 thread, with a distance ≤2D from the differential pressure tap, where D is the pipe diameter. A temperature transmitter 6 is installed between temperature sensor 2 and the DCS control system 5, converting the temperature signal into a 4-20mA current signal and sending it to the DCS control system 5. A condenser 7 is also installed on the pipe between the throttling device 1 and the three-valve manifold 3. One end of the pressure transmitter 8 is directly welded to the pipe pressure tap via a pressure guide pipe, on which a shut-off valve is installed. The other end is connected to the DCS control system 5. The DCS control system's temperature and pressure compensation algorithm module is based on the Honeywell DCS control system. Input parameters include differential pressure, temperature, and static pressure, with an output mass flow rate error ≤0.5%.

[0016] The improved balanced flow meter has the following advantages: 1. Improved accuracy: Overall accuracy reaches ±0.3%, range ratio expanded to 50:1, supporting Reynolds numbers 200-10. 7 .

[0017] 2. Energy saving and consumption reduction: Pressure loss is reduced to 0.2kPa (DN50 pipeline), saving approximately RMB12,000 in energy costs per year (based on 10 units / year).

[0018] 3. Intelligent maintenance: The self-cleaning structure reduces clogging and malfunctions by 80%.

[0019] 4. Wide applicability: It can measure fluids with viscosity from 1 to 1000 cP and supports extreme operating conditions from -196℃ to 850℃.

[0020] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.

Claims

1. A high-precision modular balanced flow meter, comprising a throttling element and a temperature sensor, wherein the throttling element includes an orifice plate and flanges located on both sides of the orifice plate, and the throttling element is installed on a pipeline via the flanges, characterized in that, A central hole is formed in the center of the orifice plate, and multiple small holes are evenly spaced around the central hole. The diameter ratio of the small holes to the central hole is 0.4-0.

6. The thickness of the throttling element is ≥5mm. The throttling element is connected to a three-valve manifold through a pipe. The three-valve manifold is connected to a differential pressure transmitter. The differential pressure transmitter is connected to a DCS control system. The DCS control system is connected to a temperature sensor, which is installed on the outer wall of the pipe.

2. The high-precision modular balanced flow meter according to claim 1, characterized in that, The diameter of the central hole is twice the diameter of the small hole, and the spacing between the holes is 1.5 times the diameter of the small hole.

3. A high-precision modular balanced flow meter according to claim 1, characterized in that, The temperature sensor is a miniature platinum resistance temperature sensor. A temperature transmitter is installed between the temperature sensor and the DCS control system to convert the temperature signal into a 4-20mA current signal and send it to the DCS control system.

4. A high-precision modular balanced flow meter according to claim 1, characterized in that, A condenser is also installed on the pipe between the throttling device and the three-valve manifold.

5. A high-precision modular balanced flow meter according to claim 1, characterized in that, The pressure transmitter is connected to the pressure control system via a pressure guide pipe on the pipeline between the throttling device and the temperature transmitter.

6. A high-precision modular balanced flow meter according to claim 1, characterized in that, The temperature sensor is embedded in the pipe flange via an M16 thread, with a distance of ≤2D from the differential pressure tap, where D is the pipe diameter.

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