Anti-clogging flowmeter

Abstract

The utility model discloses a prevent stifled flowmeter, including the measuring pipeline, the inner wall fixed mounting of measuring pipeline has throttling element, the right side fixed mounting of measuring pipeline has first pressure difference pipeline and second pressure difference pipeline, the right side fixed mounting of first pressure difference pipeline has electronic pressure sensing piece, the right side mounting of electronic pressure sensing piece has pressure difference sensor. The utility model discloses embedded integrated design, and the pressure sensing diaphragm is as direct pressure -taking interface, and through the silicon oil medium of internal encapsulation, the pressure signal is delivered to the post difference sensor without loss, fundamentally eliminates the traditional pressure pipe because of the crystallization of medium, the freezing loss risk of solidification that leads to the blockage, utilizes the physical characteristic of silicon oil simultaneously, establishes the reliable isolation barrier between high temperature or corrosive process medium for core electronic pressure sensing piece, thereby significantly improves the environmental adaptability, measurement reliability and service life of instrument under the harsh working condition.

Description

Technical Field

[0001] This utility model relates to the field of differential pressure flow meter technology, specifically an anti-clogging flow meter. Background Technology

[0002] Differential pressure flow meters, as a long-established, technologically mature, and widely used flow measurement instrument, work on the principle of calculating flow rate based on the differential pressure generated when fluid flows through a throttling element. However, traditional differential pressure flow meters have revealed several inherent defects in long-term practice. They usually require long pressure tapping pipes to lead the high and low pressure signals generated by the throttling element to a differential pressure transmitter far away from the pipeline. These pressure tapping pipes and their fittings constitute a complex pressure tapping system, which not only has high installation and maintenance costs but also becomes a weak link in the system's reliability.

[0003] When measuring media that are prone to crystallization, viscous, or contain particles, the pressure tapping tube and its valves are easily blocked, leading to measurement failure. In low-temperature environments, the condensate or the medium itself in the conduit may freeze, causing damage to the sensor diaphragm or even the risk of tube rupture. To address this, we propose an anti-clogging flow meter. Utility Model Content

[0004] The purpose of this invention is to provide an anti-clogging flow meter to solve the problems mentioned in the background art, such as the pressure tapping tube and its valve being prone to clogging when measuring media that are prone to crystallization, viscous or containing particles, leading to measurement failure; and the possibility that the condensate or the medium itself in the conduit may freeze in low-temperature environments, causing damage to the sensor diaphragm or even the risk of tube rupture.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-clogging flow meter, comprising:

[0006] A measuring pipe is provided, with a throttling element fixedly installed on its inner wall. A first differential pressure pipe and a second differential pressure pipe are fixedly installed on the right side of the measuring pipe. An electronic pressure sensor is fixedly installed on the right side of the first differential pressure pipe, and a differential pressure sensor is installed on the right side of the electronic pressure sensor. A temperature sensor is fixedly installed on one side of the outer surface of the second differential pressure pipe, and a protective box is fixedly installed on the other side of the outer surface of the second differential pressure pipe. A Peltier is fixedly installed on the inner wall of the protective box, with a first heat-conducting plate fixedly installed at one end of the Peltier and a second heat-conducting plate fixedly installed at the other end. A pressure-sensing diaphragm is fixedly installed inside the left end of the second differential pressure pipe, and the interior of the second differential pressure pipe is filled with silicone oil. A PLC controller is fixedly installed on the outer surface of the protective box away from the second differential pressure pipe.

[0007] In a preferred embodiment of the anti-clogging flow meter of this utility model, the silicone oil is in contact with the pressure-sensing diaphragm and the electronic pressure-sensing component.

[0008] In a preferred embodiment of the anti-clogging flow meter of this utility model, the monitoring end of the temperature sensor penetrates through the inner wall of the second differential pressure pipeline, and the temperature sensor is electrically connected to the PLC controller.

[0009] As a preferred embodiment of the anti-clogging flow meter of this utility model, the second heat-conducting sheet penetrates the inner wall of the second differential pressure pipeline, the first heat-conducting sheet is evenly distributed along the interior of the protective box, and the Peltier is electrically connected to the PLC controller.

[0010] As a preferred embodiment of the anti-clogging flow meter of this utility model, the protective box is further provided with:

[0011] A cooling fan is fixedly installed inside the protective box on the right side, and the cooling fan is electrically connected to the PLC controller.

[0012] Compared with the prior art, this utility model provides an anti-clogging flow meter, which has the following beneficial effects:

[0013] 1. This utility model adopts an embedded integrated design, using the pressure-sensing diaphragm as the direct pressure interface, and transmitting the pressure signal to the rear differential pressure sensor without loss through the internally encapsulated silicone oil medium. This fundamentally eliminates the risk of blockage and freezing damage caused by the crystallization and solidification of the medium in traditional pressure-sensing tubes. At the same time, by utilizing the physical properties of silicone oil, a reliable isolation barrier is established between the core electronic pressure-sensing components and high-temperature or corrosive process media, thereby significantly improving the instrument's environmental adaptability, measurement reliability, and service life under harsh working conditions.

[0014] 2. This invention constructs an active thermal management structure by installing Peltier components on the outside of the first and second differential pressure pipelines. This structure can perform real-time and precise temperature control on the silicone oil filled inside, effectively isolating interference from external environmental temperature fluctuations, stabilizing the working temperature of the silicone oil within its optimal operating window, thereby ensuring high stability of its physicochemical properties such as density and viscosity. This fundamentally avoids performance degradation caused by overheating decomposition or overcooling solidification of the silicone oil, ensuring the long-term accuracy of pressure signal transmission and the consistency of measurement results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0017] Figure 3 This is a schematic diagram of the cooling fan structure of this utility model.

[0018] In the diagram: 1. Measuring pipe; 2. Throttling element; 3. First differential pressure pipe; 4. Electronic pressure sensing element; 5. Differential pressure sensor; 6. Second differential pressure pipe; 7. Cooling fan; 8. PLC controller; 9. Protective enclosure; 10. First heat-conducting plate; 11. Peltier; 12. Pressure-sensing diaphragm; 13. Temperature sensor; 14. Second heat-conducting plate; 15. Silicone oil. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-3 A clog-resistant flow meter includes a measuring pipe 1, a throttling element 2 fixedly installed on the inner wall of the measuring pipe 1, a first differential pressure pipe 3 and a second differential pressure pipe 6 fixedly installed on the right side of the measuring pipe 1, an electronic pressure sensing element 4 fixedly installed on the right side of the first differential pressure pipe 3, a differential pressure sensor 5 installed on the right side of the electronic pressure sensing element 4, a temperature sensor 13 fixedly installed on one side of the outer surface of the second differential pressure pipe 6, a protective box 9 fixedly installed on the other side of the outer surface of the second differential pressure pipe 6, a Peltier 11 fixedly installed on the inner wall of the protective box 9, a first heat-conducting plate 10 fixedly installed at one end of the Peltier 11, a second heat-conducting plate 14 fixedly installed at the other end of the Peltier 11, a pressure-sensing diaphragm 12 fixedly installed at the left end of the interior of the second differential pressure pipe 6, the interior of the second differential pressure pipe 6 is filled with silicone oil 15, and a PLC controller 8 is fixedly installed on the outer surface of the protective box 9 away from the second differential pressure pipe 6.

[0021] In this implementation scheme, an embedded integrated design is adopted, using the pressure-sensing diaphragm 12 as the direct pressure interface. The pressure signal is transmitted losslessly to the downstream differential pressure sensor 5 through the internally encapsulated silicone oil 15 medium. This fundamentally eliminates the risks of blockage and freezing damage caused by the crystallization and solidification of the medium in traditional pressure-sensing tubes. Simultaneously, the physical properties of silicone oil 15 establish a reliable isolation barrier between the core electronic pressure-sensing component 4 and high-temperature or corrosive process media, significantly improving the instrument's environmental adaptability, measurement reliability, and service life under harsh operating conditions. Furthermore, by installing Peltier 11 and other components outside the first differential pressure pipe 3 and the second differential pressure pipe 6, an active thermal management structure is constructed. This structure can perform real-time and precise temperature control of the internally filled silicone oil 15, effectively isolating interference from external environmental temperature fluctuations and stabilizing the silicone oil 15's operating temperature within its optimal operating window. This ensures the high stability of its physicochemical properties, such as density and viscosity, fundamentally avoiding performance degradation caused by overheating or overcooling of silicone oil 15, and guaranteeing the long-term accuracy of pressure signal transmission and the consistency of measurement results.

[0022] Furthermore:

[0023] In an optional embodiment, silicone oil 15 is in contact with pressure-sensitive diaphragm 12 and with electronic pressure-sensitive element 4.

[0024] In this implementation scheme: the structure utilizes silicone oil 15 to achieve a fully enclosed and direct pressure signal transmission from the pressure-sensing diaphragm 12 to the electronic pressure-sensing component 4, with the shortest path and no mechanical transmission loss, ensuring the real-time performance and high fidelity of pressure sensing.

[0025] Furthermore:

[0026] In an optional embodiment, the monitoring end of the temperature sensor 13 extends through the inner wall of the second differential pressure pipe 6, and the temperature sensor 13 is electrically connected to the PLC controller 8.

[0027] In this implementation plan: This design constitutes the sensing link of the temperature closed-loop control. By directly monitoring the temperature of silicone oil 15 and feeding it back to the PLC controller 8, it provides the core basis for realizing a precise and proactive temperature control strategy.

[0028] Furthermore:

[0029] In an optional embodiment, the second heat-conducting plate 14 extends through the inner wall of the second differential pressure pipe 6, the first heat-conducting plate 10 is evenly distributed along the interior of the protective box 9, and the Peltier 11 is electrically connected to the PLC controller 8.

[0030] In this implementation scheme: Under the intelligent drive of the PLC controller 8, the cold / heat generated by the Peltier 11 can be directly applied to the silicone oil 15 through the second heat-conducting plate 14 that penetrates the inner wall. At the same time, the heat / cold energy on the other side is quickly dissipated through the uniformly distributed first heat-conducting plate 10, thereby realizing rapid, uniform and precise control of the temperature of the silicone oil 15.

[0031] Furthermore:

[0032] In an optional embodiment, the protective housing 9 further includes:

[0033] Cooling fan 7 is fixedly installed inside the protective box 9 on the right side, and cooling fan 7 is electrically connected to PLC controller 8.

[0034] In this implementation scheme: Under the intelligent drive of the PLC controller 8, the cooling fan 7 can be precisely started, stopped or speed adjusted according to the actual heat load of the system, providing on-demand forced convection cooling for the core temperature control system. This not only ensures the continuous and efficient operation and long service life of the Peltier 11.

[0035] Working Principle: When using this anti-clogging flow meter, as the fluid flows through the throttling element 2 in the measuring pipe 1, a stable pressure difference (high pressure P1 and low pressure P2) is generated before and after it. This pressure difference acts on the pressure-sensing diaphragm 12, which is in direct contact with the medium, through pressure taps located on both sides of the throttling element 2. The pressure is transmitted through the pressure-sensing diaphragm 12 to the silicone oil 15, which is sealed in the first differential pressure pipe 3 and the second differential pressure pipe 6. The silicone oil 15, as an incompressible pressure-transmitting medium, transmits the pressure signal synchronously and without loss to the electronic pressure sensor 4 at the rear end. After accurately sensing the pressure of the silicone oil 15 from the high-pressure side and the low-pressure side, the electronic pressure sensor 4 converts this physical signal into an electrical signal. Finally, the differential pressure sensor 5 calculates the precise differential pressure value, thereby calculating the instantaneous flow rate according to Bernoulli's equation.

[0036] Meanwhile, to ensure measurement accuracy is unaffected by ambient temperature fluctuations, an active temperature control system integrated into the second differential pressure pipeline 6 operates continuously. Temperature sensor 13 monitors the temperature of silicone oil 15 in real time and feeds it back to the PLC controller 8. Based on the deviation between the set value and the measured value, the PLC controller 8 precisely controls the direction and magnitude of the current in the Peltier 11 to achieve bidirectional temperature regulation (cooling or heating) of the silicone oil 15. The cooling or heating generated by the Peltier 11 is transferred to the silicone oil 15 through the second heat-conducting plate 14, while the waste heat generated during operation is discharged through the first heat-conducting plate 10 and exhausted from the system by the cooling fan 7. This closed-loop control system stabilizes the temperature of the silicone oil 15 within an optimal set range, thus preventing it from deteriorating due to overheating or solidifying due to overcooling, permanently maintaining its stable physical properties (such as density and viscosity). This fundamentally eliminates the interference of temperature changes on pressure transmission and sensor reference, ensuring the long-term measurement accuracy and reliability of the flow meter under all-weather conditions. This is the working principle of this anti-clogging flow meter.

[0037] 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. A clog-resistant flow meter, characterized in that, include: A measuring pipe (1) is provided, with a throttling element (2) fixedly installed on the inner wall of the measuring pipe (1). A first differential pressure pipe (3) and a second differential pressure pipe (6) are fixedly installed on the right side of the measuring pipe (1). An electronic pressure sensing element (4) is fixedly installed on the right side of the first differential pressure pipe (3), and a differential pressure sensor (5) is installed on the right side of the electronic pressure sensing element (4). A temperature sensor (13) is fixedly installed on one side of the outer surface of the second differential pressure pipe (6), and a protective device is fixedly installed on the other side of the outer surface of the second differential pressure pipe (6). The protective box (9) has a Peltier (11) fixedly installed on its inner wall. A first heat-conducting plate (10) is fixedly installed on one end of the Peltier (11), and a second heat-conducting plate (14) is fixedly installed on the other end of the Peltier (11). A pressure-sensing diaphragm (12) is fixedly installed on the left end of the second differential pressure pipe (6). The interior of the second differential pressure pipe (6) is filled with silicone oil (15). A PLC controller (8) is fixedly installed on the outer surface of the protective box (9) away from the second differential pressure pipe (6).

2. The anti-clogging flow meter according to claim 1, characterized in that, The silicone oil (15) is in contact with the pressure-sensitive diaphragm (12) and the silicone oil (15) is in contact with the electronic pressure-sensitive element (4).

3. The anti-clogging flow meter according to claim 1, characterized in that, The monitoring end of the temperature sensor (13) penetrates the inner wall of the second differential pressure pipeline (6), and the temperature sensor (13) is electrically connected to the PLC controller (8).

4. The anti-clogging flow meter according to claim 1, characterized in that, The second heat-conducting plate (14) penetrates the inner wall of the second differential pressure pipe (6), the first heat-conducting plate (10) is evenly distributed along the interior of the protective box (9), and the Peltier (11) is electrically connected to the PLC controller (8).

5. The anti-clogging flow meter according to claim 1, characterized in that, The protective box (9) is also equipped with: A cooling fan (7) is fixedly installed inside the right end of the protective box (9), and the cooling fan (7) is electrically connected to the PLC controller (8).

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