Automatic adjusting shielding device for improving measurement stability of online laser analyzer
By designing an automatic adjustment shading device, the problem of online laser analyzers being susceptible to dirty media is solved, the stable operation of the instrument and data accuracy are achieved, the maintenance cycle is extended, and safety and detection accuracy are improved.
Patent Information
- Application Number
- CN202421497736.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-06-27
AI Technical Summary
Online laser analyzers are susceptible to dirty media, resulting in shutdown and failure, affecting operational continuity and detection accuracy.
An automatic shading device is designed, including a transmitting unit, a receiving unit, a purge unit, a shut-off valve, a purge nitrogen and a V-shaped baffle. The laser analyzer transmittance value is restored by adjusting the shading device, and the alarm and adjustment screen display are displayed in the program to ensure continuous operation of the instrument and data accuracy.
It effectively solves the impact of dirty media on laser analyzers, extends maintenance cycle, reduces labor intensity, extends lens life, improves safety and reliability, and ensures detection continuity and accuracy.
Smart Images
Figure CN223192798U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of on-line analyzer measurement, and particularly relates to an automatic adjustment shielding device for improving the measurement stability of an on-line laser analyzer. Background Technique
[0002] On-line laser analyzers can be widely used in metallurgy, chemical industry, petroleum, electric power and their automation control systems. During the long-term use of the analyzers, the medium is often soiled, causing failures of on-line laser analyzers and abnormal detection of instrument data, which can easily lead to shutdowns, furnace stoppages, etc., seriously affecting the safe production of the process and the quality production accidents of products. Therefore, on-line analyzers in the instrument control system have a crucial impact on safe production. The currently adopted on-line laser analyzer system consists of a primary sampling valve, a sampling pipeline, a purging pipeline, and an analysis and detection device. The on-line laser analyzer is often installed on pipelines with soiled media, such as converter gas and coke oven gas. Therefore, how to ensure the accurate, long-term and continuous on-line operation of the on-line laser analyzer has become an urgent technical problem to be solved. Content of the Utility Model
[0003] The utility model provides an automatic adjustment shielding device for improving the measurement stability of an on-line laser analyzer to solve the problems existing in the above background.
[0004] To achieve the above purpose, the utility model adopts the following technical solutions:
[0005] An automatic adjustment shielding device for improving the measurement stability of an on-line laser analyzer includes a coal gas pipeline network. On both outer sides of the coal gas pipeline network, primary stop valves are provided. A transmitting unit is connected to one of the primary stop valves, and a receiving unit is connected to the other primary stop valve. A positive-pressure purging nitrogen pipeline is provided between the transmitting unit and the receiving unit. The transmitting unit is also connected to an electrical control box, and the electrical control box is connected to the receiving unit. The transmitting unit and the primary stop valve are both connected to a purging unit through the positive-pressure purging nitrogen pipeline. A V-shaped baffle is rotatably provided inside the coal gas pipeline network.
[0006] Further, a collar is provided between the transmitting unit and the primary stop valve. Welding flanges and instrument flanges are respectively provided at the tops of the primary stop valves.
[0007] Further, a transmitting and receiving cable is connected between the transmitting unit and the receiving unit. A power supply is also provided between the receiving unit and the electrical control box. An exhaust is provided at the bottom of the receiving unit.
[0008] Further, an electric actuator is provided on the outer wall side of the coal gas pipeline network, and the electric actuator is connected to the V-shaped baffle through a connecting rotating shaft.
[0009] Furthermore, a plurality of measuring optical path segment tile structures are provided on the pipeline of the primary stop valve located inside the gas pipeline network.
[0010] Furthermore, an operator is provided inside the electric control box, and the purging unit is also connected with an air inlet pipe.
[0011] The utility model has the following beneficial effects:
[0012] An automatic adjustment shielding device for improving the measurement stability of an on-line laser analyzer provided by the utility model mainly consists of components such as a transmitting unit, a receiving unit, a purging unit, a stop valve, purging nitrogen, a V-shaped baffle and a control box. When the transmittance value of the laser analyzer changes, the automatic shielding device is adjusted to make the transmittance value of the laser analyzer return to the original value. An alarm and adjustment screen are added to the program for the high and low changes of the transmittance value of the analyzer, and the alarm value is displayed on the upper-level screen, ensuring the continuous operation of the instrument detection, meeting the stable operation of the instrument control system and the normal measurement of the analyzer, as well as the data accuracy of uploading the analysis indication value, and solving the problem that in the current detection process of the on-line laser analyzer, due to the analyzer being extremely vulnerable to the influence of dirty media, shutdown failures usually occur, ultimately having a greater impact on the operation continuity and detection accuracy of the on-line laser analyzer.
[0013] In the utility model, the tile structure of the welded cylinder combination reduces the processing cost and enhances the mechanical strength while ensuring the original functions. The purging inner rod and the receiving end ball valve component are welded well before leaving the factory, and only the transmitting end needs to be adjusted during the on-site optical path adjustment.
[0014] In the utility model, for most application occasions, especially for application occasions with high dust content and media containing a large amount of moisture, after setting a suitable purging gas flow rate, the optical window can also be kept clean for a long time.
[0015] The utility model restores the transmittance value of the laser analyzer by adjusting the shielding device, and this method effectively solves the defect that dirty media hinders the normal detection of the laser analyzer.
[0016] In the utility model, the use of the automatically adjusted V-shaped baffle of the laser gas analyzer measuring device extends the maintenance period, reduces the labor intensity of the operators, extends the service life of the analyzer lens, saves the equipment maintenance cost. At the same time, the use of the automatically adjusted V-shaped baffle of the laser gas analyzer measuring device largely avoids the analyzer malfunction caused by dirty media, so as to avoid misrecovering unqualified gas and causing potential safety hazards, and improves the safety reliability of the entire gas recovery system. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0018] Figure 2 This is a schematic diagram of the inner structure of the gas pipeline network of the present utility model.
[0019] The meanings of the reference numerals are as follows:
[0020] 1. Transmitting unit; 2. Receiving unit; 3. Purge unit; 4. Ferrule; 5. Primary shut-off valve; 6. Welded flange; 7. Instrument flange; 8. Electric actuator; 9. Transmitting and receiving cable; 10. Drain; 11. Power supply; 12. Positive-pressure purge nitrogen; 13. Inlet pipe; 14. V-shaped baffle; 15. Gas pipeline network; 16. Electrical control box; 17. Operator; 18. Connecting rotating shaft; 19. Measuring optical path section tile structure. Specific embodiments
[0021] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0022] As Figure 1-2 shown, an automatic adjustment shielding device for improving the measurement stability of an on-line laser analyzer includes a gas pipeline network 15. Primary shut-off valves 5 are provided on both outer sides of the gas pipeline network 15. A transmitting unit 1 is connected to one of the primary shut-off valves 5, and a receiving unit 2 is connected to the other primary shut-off valve 5. A positive-pressure purge nitrogen 12 pipeline is provided between the transmitting unit 1 and the receiving unit 2. The transmitting unit 1 is also connected to an electrical control box 16, and the electrical control box 16 is connected to the receiving unit 2. Moreover, the transmitting unit 1 and the primary shut-off valve 5 are both connected to a purge unit 3 through the positive-pressure purge nitrogen 12 pipeline. An inner side of the gas pipeline network 15 is also provided with a rotatable V-shaped baffle 14.
[0023] A ferrule 4 is provided between the transmitting unit 1 and the primary shut-off valve 5. Welded flanges 6 and instrument flanges 7 are respectively provided at the top of the primary shut-off valve 5.
[0024] A transmitting and receiving cable 9 is connected between the transmitting unit 1 and the receiving unit 2. A power supply 11 is also provided between the receiving unit 2 and the electrical control box 16. A drain 10 is provided at the bottom of the receiving unit 2.
[0025] An electric actuator 8 is provided on an outer wall side of the gas pipeline network 15, and the electric actuator 8 and the V-shaped baffle 14 are connected through a connecting rotating shaft 18.
[0026] A plurality of measuring optical path section tile structures 19 are also provided on a pipeline connecting the primary shut-off valve 5 located inside the gas pipeline network 15.
[0027] An operator 17 is provided inside the electrical control box 16. The purge unit 3 is also connected to an inlet pipe 13.
[0028] There is a connection port on the gas pipeline network 15. The laser analyzer transmitting unit 1 is connected to one side of the gas pipeline network 15 through a clamp 4 and a primary shut-off valve 5. The receiving end element 2 of the laser analyzer is connected to the other side of the gas pipeline network 15 through a welding flange 6 and an instrument flange 7. The purging unit 3 of the laser analyzer is connected to the nitrogen pipeline network through an inlet pipe 13. The purging unit 3 outputs three paths of nitrogen. The first path of purging nitrogen is connected to the instrument flange 7 through a positive pressure purging nitrogen 12 pipeline, and the positive pressure purging nitrogen 12 is blown into the gas pipeline network 15 from the welding flange 6. The second path of purging nitrogen is connected to the clamp 4 through a positive pressure purging nitrogen 12 pipeline, and the positive pressure purging nitrogen 12 is blown into the gas pipeline network 15 from the primary shut-off valve 5. The third path of positive pressure purging nitrogen 12 is connected to the transmitting unit 1 through a positive pressure purging nitrogen 12 pipeline, then connected to the receiving unit 2 through a positive pressure purging nitrogen 12 pipeline, and finally discharged to the atmosphere through a vent 10. The laser beam emitted by the transmitting unit 1 of the laser analyzer detection signal and transmittance intensity passes through the clamp 4, the primary shut-off valve 5, the gas pipeline network 15, the welding flange 6 and the instrument flange 7, and the receiving unit 2 receives and analyzes the laser beam, and finally transmits the processed signal to the LED display screen of the transmitting unit 1 through a transmitting and receiving cable 9 for display. At the same time, the signal is transmitted to the computer screen display through the GPRS antenna of the electrical control cabinet 18. The power supply of the laser analyzer is provided by the electrical control box 16 to convert the external 220V power supply into DC24V and supply power to the receiving unit 2 and the transmitting end element 1 through wires.
[0029] In specific applications, when the laser analyzer gives a low transmittance alarm, the alarm relay of the laser analyzer will have two outputs. The first output is used to display the alarm code on the LED liquid crystal screen of the emission unit 1, and the second output is used for alarm display on the computer monitoring screen. At the same time, according to the low alarm contact signal of the transmittance value of the emission unit 1 of the laser analyzer, it is sent to the operator 17 through the computer PLC system. Then, the 4-20 mA valve position signal is transmitted to the local electric actuator 8 through the operator 17 to make it act. Finally, the rotation shaft 18 is connected to drive the V-shaped baffle 14 to rotate, changing the angle of the V-shaped baffle 14, so as to block the dirty medium from entering the communication pipeline between the emission unit 1 and the receiving unit 2 of the laser analyzer. At the same time, the positive pressure purge nitrogen 12 purges the communication pipeline between the emission unit 1 and the receiving unit 2 of the laser analyzer and the optical lens, improving the smoothness of the optical lens of the laser analyzer, thus eliminating the influence of the dirty medium on the transmittance of the laser analyzer and ensuring the measurement accuracy and stability of the laser analyzer; when the transmittance value of the emission unit 1 of the laser analyzer recovers and the low alarm contact signal disappears, the local electric actuator 8 stops running, and the V-shaped baffle 14 remains in place unchanged; when the laser analyzer gives a low transmittance alarm again, the automatic adjustment blocking device repeats the above actions to ensure the normal detection of the laser analyzer and effectively reduces the influence of dust and particles in the gas pipeline network 15 on its detection accuracy. Therefore, this device has good practicability.
Claims
1. An automatic adjustment shielding device for improving the measurement stability of an online laser analyzer, comprising a gas pipe network (15), characterized in that: A primary stop valve (5) is provided on both sides of the exterior of the gas pipe network (15). The primary stop valve (5) on one side is connected to a transmitting unit (1), and the primary stop valve (5) on the other side is connected to a receiving unit (2). A positive pressure purge nitrogen (12) pipeline is provided between the transmitting unit (1) and the receiving unit (2). The transmitting unit (1) is also connected to an electrical control box (16), which is connected to the receiving unit (2). The transmitting unit (1) and the primary stop valve (5) are both connected to a purge unit (3) via a positive pressure purge nitrogen (12) pipeline. A V-shaped baffle (14) is also rotatably provided on the inner side of the gas pipe network (15).
2. The automatic adjustment shielding device for improving the measurement stability of an online laser analyzer according to claim 1, characterized in that: A locking clamp (4) is provided between the emission unit (1) and the primary stop valve (5), and a welding flange (6) and an instrument flange (7) are respectively provided on the top of the primary stop valve (5).
3. The automatic adjustment shielding device for improving the measurement stability of an online laser analyzer according to claim 2, characterized in that: A transmitting and receiving cable (9) is connected between the transmitting unit (1) and the receiving unit (2), a power supply (11) is provided between the receiving unit (2) and the electrical control box (16), and a drain (10) is provided at the bottom of the receiving unit (2).
4. The automatic adjustment shielding device for improving the measurement stability of an online laser analyzer according to claim 1, characterized in that: An electric actuator (8) is provided on the outer wall side of the gas pipe network (15), and the electric actuator (8) and the V-shaped baffle (14) are connected via a connecting rotating shaft (18).
5. The automatic adjustment shielding device for improving the measurement stability of an online laser analyzer according to claim 4, characterized in that: A plurality of measuring optical path segment tile structures (19) are also provided on the connecting pipe of the primary stop valve (5) located inside the gas pipe network (15).
6. The automatic adjustment shielding device for improving the measurement stability of an online laser analyzer according to claim 1, characterized in that: An operator (17) is provided inside the electrical control box (16), and the purge unit (3) is also connected to an air intake pipe (13).