Circulating fluidized bed boiler four-tube leakage detection device and method

Abstract

The invention relates to the technical field of boiler four-tube leakage detection sensors, in particular to a circulating fluidized bed boiler four-tube leakage detection device and method.The circulating fluidized bed boiler four-tube leakage detection device comprises two sets of first mounting rings and two sets of second mounting rings, and the two sides of the two sets of first mounting rings and the two sides of the two sets of second mounting rings are each provided with a connecting plate; multiple groups of first sliding blocks are movably mounted on the inner wall of the mounting frame, circular through grooves are formed in the outer surfaces of the multiple groups of first sliding blocks, threads are formed in the circular through grooves, adjusting rings are movably mounted in the circular through grooves, threads are formed in the inner walls of the adjusting rings, and sonic sensors are movably mounted on the inner walls of the adjusting rings; through the sliding block and the adjusting ring, the height flexibility and adaptability are achieved. The second sliding block freely slides in the sliding grooves of the first mounting ring and the second mounting ring, so that the positions of the mounting frame and the sonic sensor can be flexibly adjusted on the pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of boiler four-tube leakage detection sensors, in particular to a circulating fluidized bed boiler four-tube leakage detection device and method. Background Art

[0002] During the operation of circulating fluidized bed boilers, the leakage of the four boiler tubes (including water-cooled wall tubes, superheater tubes, reheater tubes and economizer tubes) has always been an important factor affecting the safe and stable operation of the boiler. Timely and accurate detection of the leakage of the four boiler tubes is of great significance for preventing boiler accidents and ensuring production safety.

[0003] At present, most of the boiler four-tube leak detection sensors commonly used in the market are installed by cable ties. Although this installation method is simple and easy, it is inconvenient to adjust. Once the sensor installation position is determined, it is difficult to make fine adjustments, which limits the flexible application of the sensor in different pipes and locations.

[0004] Therefore, in view of the problems of inconvenient installation and adjustment and single correspondence of the existing boiler four-tube leakage detection sensor, it is necessary to develop a new circulating fluidized bed boiler four-tube leakage detection device and method to improve the flexibility and detection efficiency of the sensor and reduce the installation and maintenance costs. Summary of the invention

[0005] (I) Purpose of the invention

[0006] In view of this, the purpose of the present invention is to provide a circulating fluidized bed boiler four-tube leakage detection device and method to solve the problems raised in the above background.

[0007] (II) Technical solution

[0008] A four-tube leakage detection device for a circulating fluidized bed boiler comprises two groups of first mounting rings and two groups of second mounting rings, both sides of the two groups of the first mounting rings and the second mounting rings are provided with connecting plates, and one side of the two groups of the first mounting rings and the second mounting rings is provided with a slide groove, the inner wall of the slide groove is movably provided with a second sliding block, and one end of the second sliding block is connected to a connecting rod, one end of the connecting rod is connected to a mounting frame, and the inner wall of the mounting frame is movably provided with multiple groups of first sliding blocks, the outer surfaces of the multiple groups of the first sliding blocks are provided with circular through grooves, and threads are provided in the circular through grooves, an adjusting ring is movably provided in the circular through groove, and the inner wall of the adjusting ring is provided with threads, and an acoustic wave sensor is movably provided on the inner wall of the adjusting ring.

[0009] Preferably, a limiting groove is provided at the top of the mounting frame.

[0010] Preferably, fixing screws are movably mounted on the tops of the plurality of groups of the first sliding blocks.

[0011] Preferably, second limiting rings are fixedly mounted on both sides of the adjustment ring.

[0012] Preferably, the outer surface of the connecting rod is provided with threads, and a first limiting ring is movably installed on the outer surface of the connecting rod.

[0013] Preferably, the connecting plates are fixed to each other by bolts and nuts.

[0014] A method for detecting four-tube leakage of a circulating fluidized bed boiler comprises the following steps:

[0015] 1) The detection device is fixedly mounted on the outer surface of the boiler pipe through two sets of first mounting rings and second mounting rings;

[0016] 2) adjusting the position of the second sliding block in the slide groove to change the specific position of the mounting bracket on the pipeline;

[0017] 3) Determine the detection point of the acoustic wave sensor by sliding the first sliding block on the mounting frame and adjusting the fixing screw;

[0018] 4) Rotate the adjustment ring to adjust the extension length of the acoustic sensor so that it is in close contact with the outer surface of the pipe;

[0019] 5) Use an acoustic sensor to capture the acoustic signal generated by the leak in the pipeline, and after processing, accurately indicate the location and extent of the leak; before testing, preheat and calibrate the acoustic sensor to ensure its working stability and accuracy;

[0020] 6) During the detection process, the temperature of the outer wall of the pipeline is monitored in real time using a temperature sensor to correct the error of the acoustic signal caused by temperature changes;

[0021] 7) Combined with visual inspection, monitor the outer wall of the pipeline to assist in identifying the appearance characteristics of the leakage point, such as corrosion, cracks, etc.;

[0022] 8) After detecting a leakage signal, the alarm system will be activated immediately to notify the operator through sound and light alarms or remote communication so that timely measures can be taken.

[0023] It can be seen from the above technical solutions that the present application has the following beneficial effects:

[0024] 1. The invention achieves high flexibility and adaptability through the sliding block and the adjustment ring. The second sliding block slides freely in the slide grooves of the first mounting ring and the second mounting ring, so that the mounting frame and the acoustic wave sensor can be flexibly adjusted on the pipeline. This design not only meets the detection needs of different pipeline layouts, but also can fine-tune the sensor position during boiler operation to ensure the accuracy and reliability of detection.

[0025] 2. The invention uses two sets of first mounting rings and second mounting rings to tightly fix the device on the outer surface of the boiler pipe, ensuring the stability of the device and preventing it from falling off or shifting. This stable installation method not only improves the detection accuracy, but also reduces false alarms and missed alarms caused by loose or shifted devices. The acoustic wave sensor is tightly pressed against the outer surface of the pipe through the adjustment ring, which can accurately capture the acoustic wave signal generated by the leak and realize real-time monitoring and early warning.

[0026] 3. The invention uses bolts and nuts to fix the connecting plates to each other. This connection method is simple and reliable, and is convenient for assembly and disassembly of the device. When the acoustic wave sensor needs to be repaired or replaced, the staff can easily disassemble the connecting plate, quickly locate and replace the damaged parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the first three-dimensional structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the second three-dimensional structure of the present invention;

[0029] Figure 3 It is the explosion schematic diagram of the present invention;

[0030] Figure 4 For the present invention Figure 1 The enlarged schematic diagram at A in the middle;

[0031] Figure 5 For the present invention Figure 3 The enlarged schematic diagram of point B in the middle;

[0032] Figure 6 For the present invention Figure 3 Enlarged schematic diagram at point C in the middle.

[0033] In the figure: 1. first mounting ring; 2. second mounting ring; 3. connecting plate; 4. bolt; 5. nut; 6. mounting frame; 7. first sliding block; 8. acoustic wave sensor; 111. slide groove; 511. connecting rod; 512. first limiting ring; 513. second sliding block; 611. limiting groove; 612. fixing screw; 811. adjusting ring; 812. second limiting ring. DETAILED DESCRIPTION

[0034] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and use. It should be understood that in all of these figures, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0035] See also Figure 1-6 , an embodiment provided by the present invention:

[0036] A four-tube leakage detection device for a circulating fluidized bed boiler comprises two groups of first mounting rings 1 and two groups of second mounting rings 2, both sides of the two groups of first mounting rings 1 and the second mounting rings 2 are installed with connecting plates 3, and one side of the two groups of first mounting rings 1 and the second mounting rings 2 is provided with a slide groove 111, the inner wall of the slide groove 111 is movably installed with a second sliding block 513, and one end of the second sliding block 513 is connected to a connecting rod 511, one end of the connecting rod 511 is connected to a mounting frame 6, and the inner wall of the mounting frame 6 is movably installed with multiple groups of first sliding blocks 7, the outer surfaces of the multiple groups of first sliding blocks 7 are provided with circular through grooves, and the circular through grooves are provided with threads, an adjusting ring 811 is movably installed in the circular through groove, and the inner wall of the adjusting ring 811 is provided with threads, and the inner wall of the adjusting ring 811 is movably installed with an acoustic wave sensor 8.

[0037] Furthermore, a limiting groove 611 is provided at the top of the mounting frame 6 , and the limiting groove cooperates with a fixing screw 612 to fix the first sliding block 7 .

[0038] Furthermore, the top ends of the multiple groups of first sliding blocks 7 are all movably mounted with fixing screws 612. By adjusting the tightness of the screws 612, the position of the sliding block can be adjusted or fixed, providing a flexible installation and adjustment method so that the sensor can be accurately positioned at any position on the pipeline as needed.

[0039] Furthermore, second limiting rings 812 are fixedly installed on both sides of the adjustment ring 811. The second limiting rings 812 are used to limit the rotation range of the adjustment ring to prevent it from over-rotating or loosening, thereby ensuring that the sensor can be accurately adjusted to a predetermined extension length.

[0040] Furthermore, the outer surface of the connecting rod 511 is threaded, and a first limiting ring 512 is movably mounted on the outer surface of the connecting rod 511. The threaded connection enables the first limiting ring 512 to move and be fixed at any position on the connecting rod 511, thereby fastening the second sliding block 513.

[0041] Furthermore, the connecting plates 3 are fixed to each other by bolts 4 and nuts 5. The bolts 4 and nuts 5 provide a simple and reliable connection method, reducing the difficulty of assembly and disassembly of the device.

[0042] A method for detecting four-tube leakage of a circulating fluidized bed boiler comprises the following steps:

[0043] 1) The detection device is fixedly mounted on the outer surface of the boiler pipe through two sets of first mounting rings 1 and second mounting rings 2;

[0044] 2) adjusting the position of the second sliding block 513 in the sliding groove 111 to change the specific position of the mounting bracket 6 on the pipeline;

[0045] 3) Determine the detection point of the acoustic wave sensor 8 by sliding the first sliding block 7 on the mounting frame 6 and adjusting the fixing screw 612;

[0046] 4) Rotate the adjustment ring 811 to adjust the extension length of the acoustic wave sensor 8 so that it is in close contact with the outer surface of the pipe;

[0047] 5) Use the acoustic wave sensor 8 to capture the acoustic wave signal generated by the leakage in the pipeline, and after processing, accurately indicate the location and degree of leakage; before detection, preheat and calibrate the acoustic wave sensor 8 to ensure its working stability and accuracy;

[0048] 6) During the detection process, the temperature of the outer wall of the pipeline is monitored in real time using a temperature sensor to correct the error of the acoustic signal caused by temperature changes;

[0049] 7) Combined with visual inspection, monitor the outer wall of the pipeline to assist in identifying the appearance characteristics of the leakage point, such as corrosion, cracks, etc.;

[0050] 8) After detecting a leakage signal, the alarm system will be activated immediately to notify the operator through sound and light alarms or remote communication so that timely measures can be taken.

[0051] Working principle: The four-tube leakage detection device for circulating fluidized bed boiler is tightly fixed on the outer surface of the boiler pipe through two sets of first mounting rings 1 and second mounting rings 2. The design of these two sets of mounting rings ensures that the device can be firmly attached to the pipe and is not easy to fall off or shift.

[0052] During the installation process, the second sliding blocks 513 between the two sets of first mounting rings 1 and second mounting rings 2 play a key role. These second sliding blocks 513 can slide freely in the slide grooves 111 opened on one side of the first mounting ring 1 and the second mounting ring 2. By adjusting the position of the second sliding blocks 513 in the slide grooves 111, the specific position of the mounting frame 6 on the pipeline can be flexibly changed to adapt to different pipeline layouts or detection requirements.

[0053] The mounting frame 6 is a supporting structure for the acoustic wave sensor 8, and its design is also highly flexible. On the inner wall of the mounting frame 6, multiple sets of first sliding blocks 7 are movably mounted. These first sliding blocks 7 can slide freely on the track of the mounting frame 6, thereby allowing the acoustic wave sensor 8 to detect at different positions of the pipeline. The top of the first sliding block 7 is movably mounted with a fixing screw 612. By tightening or loosening these screws, the position of the first sliding block 7 can be fixed or adjusted, thereby determining the detection point of the acoustic wave sensor 8.

[0054] The acoustic wave sensor 8 is mounted on the first sliding block 7 through the adjusting ring 811. The inner wall and the circular through groove of the adjusting ring 811 are both provided with threads, so that the acoustic wave sensor 8 can rotate in the adjusting ring 811 and adjust its extension length. This design allows one end of the acoustic wave sensor 8 to be tightly pressed against the outer surface of the pipe, ensuring that the sound waves can be accurately and effectively transmitted to the sensor.

[0055] In addition, the outer surface of the connecting rod 511 is also provided with threads, and a first limiting ring 512 is movably installed. By rotating the first limiting ring 512, the positions of the second sliding block 513 and the connecting rod 511 can be further fixed, thereby enhancing the stability of the device.

[0056] The connecting plates 3 are fixed to each other by bolts 4 and nuts 5. This connection method is simple and reliable, and is convenient for assembly and disassembly of the device.

[0057] During the detection process, the acoustic sensor 8 captures the acoustic wave signals generated by the leakage in the pipeline. After being processed, these signals can accurately indicate the location and degree of leakage. In this way, the device can realize real-time monitoring and early warning of four-tube leakage of circulating fluidized bed boilers, thereby improving the safety and reliability of boiler operation.

[0058] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A four-tube leakage detection device for a circulating fluidized bed boiler, characterized in that: The invention comprises two groups of first mounting rings (1) and two groups of second mounting rings (2), both sides of the two groups of the first mounting rings (1) and the second mounting rings (2) are provided with connecting plates (3), and one side of the two groups of the first mounting rings (1) and the second mounting rings (2) is provided with a slide groove (111), the inner wall of the slide groove (111) is movably provided with a second sliding block (513), and one end of the second sliding block (513) is connected to a connecting rod (511), one end of the connecting rod (511) is connected to a mounting frame (6), and the inner wall of the mounting frame (6) is movably provided with multiple groups of first sliding blocks (7), the outer surfaces of the multiple groups of the first sliding blocks (7) are provided with circular through grooves, and the circular through grooves are provided with threads, an adjusting ring (811) is movably provided in the circular through groove, and the inner wall of the adjusting ring (811) is provided with threads, and the inner wall of the adjusting ring (811) is movably provided with an acoustic wave sensor (88).

2. A circulating fluidized bed boiler four-tube leakage detection device according to claim 1, characterized in that: A limiting groove (611) is provided at the top of the mounting frame (6).

3. A circulating fluidized bed boiler four-tube leakage detection device according to claim 1, characterized in that: The top ends of the plurality of groups of the first sliding blocks (7) are all movably mounted with fixing screws (612).

4. A circulating fluidized bed boiler four-tube leakage detection device according to claim 1, characterized in that: Second limiting rings (812) are fixedly mounted on both sides of the adjustment ring (811).

5. The four-tube leakage detection device for a circulating fluidized bed boiler according to claim 1, characterized in that: The outer surface of the connecting rod (511) is provided with threads, and a first limiting ring (512) is movably mounted on the outer surface of the connecting rod (511).

6. A circulating fluidized bed boiler four-tube leakage detection device according to claim 1, characterized in that: The connecting plates (3) are fixed to each other via bolts (4) and nuts (5).

7. A method for detecting four-tube leakage of a circulating fluidized bed boiler, characterized in that: The following steps are involved: 1) The detection device is fixedly mounted on the outer surface of the boiler pipe through two sets of first mounting rings (1) and second mounting rings (2); 2) adjusting the position of the second sliding block (513) in the sliding groove (111) to change the specific position of the mounting bracket (6) on the pipeline; 3) determining the detection point of the acoustic wave sensor (8) by sliding the first sliding block (7) on the mounting frame (6) and adjusting the fixing screw (612); 4) Rotate the adjustment ring (811) to adjust the extension length of the acoustic wave sensor (8) so that it is in close contact with the outer surface of the pipe; 5) using an acoustic wave sensor (8) to capture the acoustic wave signal generated by the leakage in the pipeline, and after processing, accurately indicating the location of the leakage point and the leakage degree; before the detection, preheating and calibrating the acoustic wave sensor (8) to ensure its working stability and accuracy; 6) During the detection process, the temperature of the outer wall of the pipeline is monitored in real time using a temperature sensor to correct the error of the acoustic signal caused by temperature changes; 7) Combined with visual inspection, monitor the outer wall of the pipeline to assist in identifying the appearance characteristics of the leakage point, such as corrosion, cracks, etc.; 8) After detecting a leakage signal, the alarm system will be activated immediately to notify the operator through sound and light alarms or remote communication so that timely measures can be taken.

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