Online verification and measurement device for double-flange liquid level transmitter

Abstract

The utility model discloses an online verification and measurement device for a double-flange liquid level transmitter. The online verification and measurement device comprises a pressure-stabilizing measurement cylinder and the double-flange liquid level transmitter, the double-flange liquid level transmitter comprises a first flange, a second flange and a transmitter. The top of the pressure stabilizing measuring cylinder is communicated with the transmitter through the first flange; and the bottom of the pressure-stabilizing measuring cylinder is communicated with the transmitter through the second flange. And the top and the bottom of the pressure-stabilizing measuring cylinder are respectively communicated with the top and the bottom of a chemical container to be measured. And a drain valve is arranged at the bottom of the pressure-stabilizing measuring cylinder. And an exhaust valve is arranged at the top of the pressure-stabilizing measuring cylinder. According to the utility model, on-line verification and measurement of the double-flange liquid level transmitter are realized; the top and the bottom of the pressure stabilizing measuring cylinder are connected with the chemical container through the gas phase valve and the liquid phase valve respectively, liquid level fluctuation of the chemical container can be slowed down, an anti-interference effect is achieved, and the measuring result of the double-flange liquid level transmitter is more accurate and reliable.

Description

Technical Field

[0001] This utility model relates to the field of chemical instrumentation and testing technology, specifically to an online calibration and measurement device for a dual-flange level transmitter. Background Technology

[0002] In petrochemical production, dual-flange level transmitters using differential pressure measurement are typically installed directly on chemical containers. Measurement distortion can occur due to the influence of the measured medium, necessitating calibration. However, removing the transmitter from the field and transporting it to a calibration room presents several risks: firstly, the high temperature, high pressure, flammability, explosiveness, and corrosive environment of the measured medium pose significant operational risks; secondly, the lengthy time required for offline calibration can impact production stability; and thirdly, the calibration medium differs from the measured medium at the production site, leading to errors based on the measurement principle and requiring correction of the calibration results, necessitating further adjustments at the field. Utility Model Content

[0003] The purpose of this invention is to address the problem of long calibration times for level transmitters before and after offline calibration, which affects the stability of chemical production. It provides an online calibration and measurement device for dual-flange level transmitters, ensuring convenient and reliable calibration and measurement. It eliminates the need to disassemble and reassemble the level transmitter, using the medium inside the chemical container to be tested to flush the level gauge. No external flushing device is required, and the level transmitter can be calibrated directly on-site using the medium in the chemical container.

[0004] The technical solution of this utility model is an online calibration and measurement device for a dual-flange level transmitter, including a pressure-stabilized measuring cylinder and a dual-flange level transmitter; the dual-flange level transmitter includes a first flange, a second flange and a transmitter.

[0005] Furthermore, the top of the pressure-stabilized measuring cylinder is connected to the transmitter via the first flange; the bottom of the pressure-stabilized measuring cylinder is connected to the transmitter via the second flange.

[0006] Furthermore, the top and bottom of the pressure-stabilizing measuring cylinder are respectively connected to the top and bottom of the chemical container to be tested.

[0007] Furthermore, a drain valve is provided at the bottom of the pressure stabilizing measuring cylinder.

[0008] Furthermore, an exhaust valve is provided at the top of the pressure stabilizing measuring cylinder.

[0009] Furthermore, the first flange and the second flange are respectively connected to the transmitter via capillary tubes.

[0010] Furthermore, the top of the pressure stabilizing measuring cylinder is connected to the top of the chemical container via a gas phase valve.

[0011] Furthermore, the bottom of the pressure-stabilizing measuring cylinder is connected to the bottom of the chemical container via a liquid phase valve.

[0012] The beneficial effects of this utility model are:

[0013] (1) This utility model realizes online calibration and measurement of the dual-flange level transmitter;

[0014] (2) The top and bottom of the pressure stabilizing measuring cylinder used in this utility model are connected to the chemical container through the gas phase valve and the liquid phase valve respectively, which can reduce the fluctuation of the liquid level in the chemical container, has an anti-interference effect, and makes the measurement results of the dual flange liquid level transmitter more accurate and reliable.

[0015] (3) This utility model solves the problem that the long time spent on offline calibration of dual flange level transmitters affects production stability, ensures the convenience and reliability of calibration measurement, and can be directly calibrated on-site through chemical container media. It can be promoted and applied in general dual flange level measurement applications. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the device of this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Chemical container; 2. Gas phase valve; 3. Liquid phase valve; 4. Pressure stabilizing measuring cylinder; 5. Exhaust valve; 6. Drain valve; 7. Double flange level transmitter; 8. First flange; 9. Transmitter; 10. Second flange; 11. Capillary tube. Detailed Implementation

[0019] like Figure 1 As shown, an online calibration and measurement device for a dual-flange level transmitter includes a pressure-stabilized measuring cylinder 4 and a dual-flange level transmitter 7. The dual-flange level transmitter 7 includes a first flange 8, a second flange 10, and a transmitter 9. The top of the pressure-stabilized measuring cylinder 4 is connected to the transmitter 9 via the first flange 8. The bottom of the pressure-stabilized measuring cylinder 4 is connected to the transmitter 9 via the second flange 10. The top and bottom of the pressure-stabilized measuring cylinder 4 are respectively connected to the top and bottom of the chemical container 1 to be measured.

[0020] The pressure stabilizing measuring cylinder 4 is equipped with an exhaust valve 5 and a drain valve 6 at the top and bottom, respectively.

[0021] The pressure stabilizing measuring cylinder 4 is made of seamless stainless steel pipe with an outer diameter of 76 mm and a wall thickness of 5 mm. The upper and lower end caps are made of stainless steel plate with a thickness of not less than 10 mm.

[0022] The first flange 8 and the second flange 10 are respectively connected to the transmitter 9 via capillary tubes 11.

[0023] The top of the pressure stabilizing measuring cylinder 4 is connected to the top of the chemical container 1 via the gas phase valve 2.

[0024] The bottom of the pressure stabilizing measuring cylinder 4 is connected to the bottom of the chemical container 1 via the liquid phase valve 3.

[0025] Both gas phase valve 2 and liquid phase valve 3 are primary valves, and their material and pressure rating parameters are consistent with those of the chemical container 1.

[0026] The working principle of the online calibration and measurement device of this utility model is as follows:

[0027] First, close the gas phase valve 2 and liquid phase valve 3 of the pressure stabilizing measuring cylinder 4 to ensure that the medium in the chemical container 1 does not flow in or out during the venting and draining operations of the pressure stabilizing measuring cylinder 4. Then, open the vent valve 5 at the top and the drain valve 6 at the bottom of the pressure stabilizing measuring cylinder 4 to drain the liquid in the pressure stabilizing measuring cylinder 4. Next, perform zero-point calibration on the dual-flange level transmitter 7. After the zero-point calibration is completed, close the drain valve 6 at the bottom of the pressure stabilizing measuring cylinder 4 to prevent the medium from flowing out. Then, open the lower liquid phase valve 3, and the medium in the chemical container 1 enters the pressure stabilizing measuring cylinder 4 under pressure. When medium flows out of the vent valve 5 at the top of the pressure stabilizing measuring cylinder 4, it indicates that the liquid level in the pressure stabilizing measuring cylinder 4 is full. Finally, perform range calibration on the dual-flange level transmitter 7 to ensure that it can provide accurate readings throughout the entire measurement range. This ensures that the dual-flange level transmitter 7 can accurately measure the liquid level in the chemical container 1 after calibration.

Claims

1. An online calibration and measurement device for a dual-flange level transmitter, characterized in that, It includes a pressure-stabilizing measuring cylinder (4) and a dual-flange level transmitter (7); the dual-flange level transmitter (7) includes a first flange (8), a second flange (10) and a transmitter (9); The top of the pressure stabilizing measuring cylinder (4) is connected to the transmitter (9) via the first flange (8); the bottom of the pressure stabilizing measuring cylinder (4) is connected to the transmitter (9) via the second flange (10); The top and bottom of the pressure stabilizing measuring cylinder (4) are connected to the top and bottom of the chemical container (1) to be tested, respectively.

2. The online calibration and measurement device for a dual-flange level transmitter according to claim 1, characterized in that, The first flange (8) and the second flange (10) are respectively connected to the transmitter (9) through capillary tubes (11).

3. The online calibration and measurement device for a dual-flange level transmitter according to claim 1 or 2, characterized in that, The bottom of the pressure stabilizing measuring cylinder (4) is equipped with a drain valve (6).

4. The online calibration and measurement device for a dual-flange level transmitter according to claim 1, characterized in that, The pressure stabilizing measuring cylinder (4) is equipped with an exhaust valve (5) at the top.

5. The online calibration and measurement device for a dual-flange level transmitter according to claim 1, characterized in that, The top of the pressure stabilizing measuring cylinder (4) is connected to the top of the chemical container (1) via a gas phase valve (2).

6. The online calibration and measurement device for a dual-flange level transmitter according to claim 1, characterized in that, The bottom of the pressure stabilizing measuring cylinder (4) is connected to the bottom of the chemical container (1) via a liquid phase valve (3).

7. An online calibration and measurement device for a dual-flange level transmitter according to claim 1, 2, 4, 5, or 6, characterized in that, The pressure stabilizing measuring cylinder (4) is made of stainless steel seamless steel pipe with an outer diameter of 76 mm and a wall thickness of 5 mm.

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