A device and method for detecting leakage of smoke exhaust pipe in power plant

Abstract

The invention discloses a power plant exhaust pipe leakage detection device and method, including a pipe body, a fixing ring, a flue gas sensor and a pressure sensor; a first mounting sleeve and a second mounting sleeve are fixedly installed at the outer walls of both ends of the pipe body, a first bracket and a second bracket are installed at both ends of the first mounting sleeve and the second mounting sleeve, and a reciprocating screw rod is movably installed inside the first bracket and the second bracket at both ends through a bearing; the fixing ring is movably nested on the pipe body, and both sides of the fixing ring are fixedly connected with connecting pieces, and both ends of the two connecting pieces away from the fixing ring are fixedly installed with fixing sleeves, and the two fixing sleeves are respectively threadedly connected with two reciprocating screw rods; the flue gas sensor is arranged at the outer wall of the fixing ring, and the pressure sensor is arranged at the inner wall of the fixing ring. While being able to detect pipeline leakage, it is convenient to confirm the location of the leakage point of the pipeline.

Description

Technical Field

[0001] The invention belongs to the field of pipeline leakage detection, and relates to a device and method for detecting leakage of a smoke exhaust pipeline of a power plant. Background Art

[0002] When the boiler of a thermal power plant is in use, the exhaust gas generated during combustion needs to be discharged through the smoke exhaust duct. However, when the smoke exhaust duct is in use, since the smoke contains various impurities, the impurities and the inner wall of the duct will wear each other for a long time, which will cause the duct to leak. The common smoke exhaust duct detection devices are mostly installed at the duct connection, but such detection cannot timely confirm the location of the pipeline leakage point. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a power plant exhaust pipe leakage detection device and method, which can detect pipe leakage and conveniently confirm the location of the leakage point of the pipe.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A power plant exhaust pipe leakage detection device, comprising a pipe body, a fixing ring, a flue gas sensor and a pressure sensor;

[0006] A first mounting sleeve and a second mounting sleeve are fixedly mounted on the outer walls of both ends of the tube body, respectively; a first bracket and a second bracket are mounted on both ends of the first mounting sleeve and the second mounting sleeve, respectively; and a reciprocating screw rod is movably mounted inside the first bracket and the second bracket at both ends through bearings;

[0007] The fixing ring is movably nested on the pipe body, and both sides of the fixing ring are fixedly connected with connecting pieces, and the ends of the two connecting pieces away from the fixing ring are fixedly installed with fixing sleeves, and the two fixing sleeves are respectively threadedly connected with the two reciprocating screw rods;

[0008] The smoke sensor is arranged at the outer wall of the fixing ring, and the pressure sensor is arranged at the inner wall of the fixing ring.

[0009] Preferably, both reciprocating screws are connected to a motor.

[0010] Furthermore, the first bracket is fixedly mounted on a side away from the first mounting sleeve, the motor is fixedly mounted on a side of the frame close to the reciprocating screw, a second synchronous wheel is fixedly mounted on the outside of one end of the reciprocating screw close to the first bracket, the first synchronous wheel is fixedly mounted on the output shaft end of the motor, and the first synchronous wheel and the second synchronous wheel are movably connected by a toothed belt.

[0011] Preferably, guide sleeves are fixedly installed on both sides of the fixing ring, and a plurality of guide wheels are movably installed on the inner walls of the two guide sleeves through rotating shafts, and the plurality of guide wheels are movably connected to the outer wall of the tube body.

[0012] Furthermore, an anti-slip sleeve is sleeved on the outer wall of the guide wheel.

[0013] Preferably, an air inlet flange and an air outlet flange are respectively installed on the outer sides of both ends of the tube body, and a plurality of mounting holes are provided on the outer rings of the air inlet flange and the air outlet flange.

[0014] Furthermore, sealing gaskets are provided at the ends of the air inlet flange and the air outlet flange away from the pipe body.

[0015] Preferably, a lead screw is fixedly installed inside the fixed sleeve, and the lead screw is threadedly connected to the reciprocating lead screw.

[0016] Preferably, a signal transmitter is fixedly mounted on one side of the fixing sleeve away from the connecting piece, and the signal transmitter is electrically connected to the motor, the smoke sensor and the pressure sensor.

[0017] A method for detecting leakage in a smoke exhaust pipe of a power plant based on any one of the devices described above. When a leak occurs in the pipe body, the exhaust gas will be detected by the smoke sensor on the outer wall of the fixed ring. When the smoke sensor detects the exhaust gas, it drives the reciprocating screw to rotate. When the reciprocating screw rotates, it drives the fixed sleeve to move in a straight line. After the two fixed sleeves move synchronously, the fixed ring is driven to move synchronously through the connecting piece. The fixed ring moves back and forth along the outer wall of the pipe body. After the fixed ring moves back and forth, it drives the pressure sensor on its inner wall to detect the leakage point on the pipe body. The pressure sensor senses the pressure change at the leakage point to confirm whether a leak occurs.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention arranges a reciprocating screw. When the reciprocating screw rotates, it drives the fixed sleeve to move in a straight line. After the two fixed sleeves move synchronously, they drive the fixed ring to move synchronously through the connecting piece. The fixed ring moves back and forth along the outer wall of the pipe body, so that it is convenient to move back and forth on the pipe body for detection, thereby increasing the detection range. After the fixed ring moves back and forth, it drives the pressure sensor on its inner wall to detect the leakage point on the pipe body. The pressure sensor senses the pressure change at the leakage point position, thereby confirming whether a leakage occurs.

[0020] Furthermore, by providing a guide wheel, when the fixed ring moves, the guide wheel moves on the outer wall of the tube body, so that guidance can be performed and a certain interval can be maintained between the detection end of the pressure sensor and the tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the power plant exhaust pipe leakage detection device of the present invention;

[0022] Figure 2It is a schematic diagram of the internal structure of the fixing ring of the present invention;

[0023] Figure 3 For the present invention Figure 1 An enlarged schematic diagram of A in FIG.

[0024] Figure 4 For the present invention Figure 1 An enlarged schematic diagram of point B in FIG.

[0025] Figure 5 For the present invention Figure 2 An enlarged schematic diagram of point C in FIG.

[0026] Among them: 1. Tube body; 2. First mounting sleeve; 3. Second mounting sleeve; 4. First bracket; 5. Second bracket; 6. Reciprocating screw; 7. Fixed ring; 8. Connector; 9. Fixed sleeve; 10. Screw; 11. Mounting hole; 12. Smoke sensor; 13. Pressure sensor; 14. Frame; 15. Motor; 16. Second synchronous wheel; 17. First synchronous wheel; 18. Toothed belt; 19. Guide sleeve; 20. Guide wheel; 21. Signal transmitter; 22. Inlet flange; 23. Outlet flange; 24. Nut sleeve. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] like Figure 1 and Figure 2 As shown, the power plant exhaust pipe leakage detection device of the present invention comprises a pipe body 1, a fixing ring 7, a flue gas sensor 12 and a pressure sensor 13.

[0031] The first mounting sleeve 2 and the second mounting sleeve 3 are fixedly installed on the outer walls of both ends of the tube body 1, and the first bracket 4 and the second bracket 5 are installed on both ends of the first mounting sleeve 2 and the second mounting sleeve 3. Reciprocating screw rods 6 are movably installed inside the first bracket 4 and the second bracket 5 at both ends through bearings.

[0032] The fixing ring 7 is movably mounted on the outside of the middle part of the tube body 1, and the two sides of the fixing ring 7 are fixedly connected with connecting pieces 8, and the ends of the two connecting pieces 8 away from the fixing ring 7 are fixedly mounted with fixing sleeves 9. The insides of the fixing sleeves 9 at both ends are fixedly mounted with lead screws 10, and the lead screws 10 are threadedly connected to the reciprocating screw rod 6.

[0033] The smoke sensor 12 is arranged on the outer wall of the fixing ring 7, and the pressure sensor 13 is arranged on the inner wall of the fixing ring 7. By arranging the smoke sensor 12 and the pressure sensor 13, the fixing ring 7 will drive the pressure sensor 13 on its inner wall to detect the leakage point on the tube body 1 after reciprocating movement. The pressure sensor 13 will sense the pressure change at the leakage point position to confirm whether a leakage occurs. When the pressure sensor 13 detects the leakage point, it will control the motor 15 to stop through the signal transmitter 21, so that the position of the leakage point can be confirmed.

[0034] In the present invention, a frame 14 is fixedly installed on one side of the two first brackets 4 away from the first mounting sleeve 2, a motor 15 is fixedly installed on one side of the frame 14 close to the reciprocating screw 6, a second synchronous wheel 16 is fixedly installed on the outside of one end of the reciprocating screw 6 close to the first bracket 4, a first synchronous wheel 17 is fixedly installed on the output shaft end of the motor 15, and the first synchronous wheel 17 and the second synchronous wheel 16 are movably connected by a toothed belt 18. By arranging the reciprocating screw 6, when the reciprocating screw 6 rotates, it will drive the screw 10 to move linearly, and when the screw 10 moves linearly, it will drive the fixed sleeve 9 to move synchronously. After the two fixed sleeves 9 move synchronously, they will drive the fixed ring 7 to move synchronously through the connecting piece 8, and the fixed ring 7 will reciprocate along the outer wall of the tube body 1, so that it is convenient to move back and forth on the tube body 1 for detection, thereby increasing the detection range.

[0035] In the present invention, guide sleeves 19 are fixedly installed on both sides of the fixed ring 7, and a plurality of guide wheels 20 are movably installed on the inner walls of the two guide sleeves 19 through a rotating shaft. The plurality of guide wheels 20 are movably connected to the outer wall of the tube body 1. By setting the guide sleeves 19 and the guide wheels 20, the guiding direction of the guide wheels 20 is the axial direction of the tube body 1. When the fixed ring 7 moves, the plurality of guide wheels 20 on the inner wall of the guide sleeve 19 move on the outer wall of the tube body 1, so that guidance can be performed, and at the same time, a certain interval can be maintained between the detection end of the pressure sensor 13 and the tube body 1.

[0036] In the present invention, a signal transmitter 21 is fixedly mounted on one side of the two fixing sleeves 9 away from the connecting member 8 , and the signal transmitter 21 is electrically connected to the motor 15 , the smoke sensor 12 and the pressure sensor 13 .

[0037] In the present invention, an air inlet flange 22 and an air outlet flange 23 are respectively installed on the outer sides of both ends of the tube body 1, and a plurality of mounting holes 11 are opened on the outer rings of the air inlet flange 22 and the air outlet flange 23.

[0038] In the present invention, both ends of the two reciprocating screw rods 6 are connected to the first bracket 4 and the second bracket 5 through nut sleeves 24 .

[0039] In the present invention, an anti-skid sleeve is sleeved on the outer wall of the guide wheel 20 .

[0040] In the present invention, sealing gaskets are provided at the ends of the air inlet flange 22 and the air outlet flange 23 away from the pipe body 1 .

[0041] The use process of the above power plant exhaust pipe leakage detection device is as follows:

[0042] The first step: when the pipe body 1 leaks, the exhaust gas will be detected by a plurality of smoke sensors 12 on the outer wall of the fixing ring 7. When the smoke sensors 12 detect the exhaust gas, they will control the two motors 15 to start simultaneously.

[0043] Step 2: When the two motors 15 are started at the same time, their output shafts will drive the first synchronous wheel 17 to rotate. When the first synchronous wheel 17 rotates, it will drive the second synchronous wheel 16 at one end of the reciprocating screw 6 to rotate synchronously through the toothed belt 18. When the second synchronous wheel 16 rotates, it will drive the reciprocating screw 6 to rotate. When the reciprocating screw 6 rotates, it will drive the lead screw 10 to move linearly.

[0044] Step 3: When the lead screw 10 moves linearly, it will drive the fixed sleeve 9 to move synchronously. After the two fixed sleeves 9 move synchronously, they will drive the fixed ring 7 to move synchronously through the connecting piece 8, and the fixed ring 7 will move back and forth along the outer wall of the tube body 1.

[0045] Step 4: After the fixing ring 7 moves back and forth, it will drive the pressure sensor 13 on its inner wall to detect the leakage point on the pipe body 1. The pressure sensor 13 will sense the pressure change at the leakage point to confirm whether a leakage occurs.

[0046] Step 5: When the pressure sensor 13 detects a leak, the signal transmitter 21 controls the motor 15 to stop, so that the location of the leak can be confirmed.

[0047] Working principle: When the pipe body 1 leaks, the exhaust gas will be detected by several smoke sensors 12 on the outer wall of the fixing ring 7. When the smoke sensor 12 detects the exhaust gas, it will control the two motors 15 to start at the same time. When the two motors 15 are started at the same time, their output shafts will drive the first synchronous wheel 17 to rotate. When the first synchronous wheel 17 rotates, it will drive the second synchronous wheel 16 at one end of the reciprocating screw 6 to rotate synchronously through the toothed belt 18. When the second synchronous wheel 16 rotates, it will drive the reciprocating screw 6 to rotate. When the reciprocating screw 6 rotates, it will drive the screw 10 to move linearly. After the lead screw 10 moves linearly, it will drive the fixed sleeve 9 to move synchronously. After the two fixed sleeves 9 move synchronously, they will drive the fixed ring 7 to move synchronously through the connecting piece 8. The fixed ring 7 will reciprocate along the outer wall of the tube body 1. After the fixed ring 7 moves back and forth, it will drive the pressure sensor 13 on its inner wall to detect the leakage point on the tube body 1. The pressure sensor 13 will sense the pressure change at the leakage point to confirm whether a leakage occurs. When the pressure sensor 13 detects the leakage point, it will control the motor 15 to stop through the signal transmitter 21, so that the location of the leakage point can be confirmed.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A method for detecting leakage of exhaust pipes in power plants, characterized in that: The invention comprises a power plant exhaust pipe leakage detection device, the detection device comprising: a pipe body (1), a fixing ring (7), a flue gas sensor (12) and a pressure sensor (13); A first mounting sleeve (2) and a second mounting sleeve (3) are respectively fixedly mounted on the outer walls at both ends of the tube body (1); a first bracket (4) and a second bracket (5) are respectively mounted on both ends of the first mounting sleeve (2) and the second mounting sleeve (3); and a reciprocating screw rod (6) is movably mounted inside the first bracket (4) and the second bracket (5) at both ends via bearings; The fixing ring (7) is movably nested on the tube body (1), and connecting pieces (8) are fixedly connected to both sides of the fixing ring (7). A fixing sleeve (9) is fixedly installed at one end of the two connecting pieces (8) away from the fixing ring (7), and the two fixing sleeves (9) are respectively threadedly connected to the two reciprocating screw rods (6); The smoke sensor (12) is arranged on the outer wall of the fixing ring (7), and the pressure sensor (13) is arranged on the inner wall of the fixing ring (7); The detection method comprises: when a pipe body (1) leaks, the exhaust gas is detected by a smoke sensor (12) on the outer wall of a fixing ring (7); when the smoke sensor (12) detects the exhaust gas, it drives the reciprocating screw (6) to rotate; when the reciprocating screw (6) rotates, it drives the fixing sleeve (9) to move linearly; after the two fixing sleeves (9) move synchronously, they drive the fixing ring (7) to move synchronously through a connecting piece (8); the fixing ring (7) moves reciprocatingly along the outer wall of the pipe body (1); after the fixing ring (7) moves reciprocatingly, it drives a pressure sensor (13) on its inner wall to detect a leak point on the pipe body (1); the pressure sensor (13) senses the pressure change at the leak point, thereby confirming whether a leak occurs.

2. The method for detecting leakage of smoke exhaust pipe in a power plant according to claim 1, characterized in that: The two reciprocating screw rods (6) are both connected to a motor (15).

3. The method for detecting leakage of smoke exhaust pipe in a power plant according to claim 2, characterized in that: A frame (14) is fixedly mounted on one side of the first bracket (4) away from the first mounting sleeve (2), a motor (15) is fixedly mounted on one side of the frame (14) close to the reciprocating screw rod (6), a second synchronous wheel (16) is fixedly mounted on the outside of one end of the reciprocating screw rod (6) close to the first bracket (4), a first synchronous wheel (17) is fixedly mounted on the output shaft end of the motor (15), and the first synchronous wheel (17) and the second synchronous wheel (16) are movably connected via a toothed belt (18).

4. The method for detecting leakage of smoke exhaust pipe in a power plant according to claim 1, characterized in that: Guide sleeves (19) are fixedly mounted on both sides of the fixing ring (7), and a plurality of guide wheels (20) are movably mounted on the inner walls of the two guide sleeves (19) via rotating shafts, and the plurality of guide wheels (20) are movably connected to the outer wall of the tube body (1).

5. The method for detecting leakage of smoke exhaust pipe in a power plant according to claim 4, characterized in that: An anti-slip sleeve is sleeved on the outer wall of the guide wheel (20).

6. The method for detecting leakage of smoke exhaust pipe in a power plant according to claim 1, characterized in that: An air inlet flange (22) and an air outlet flange (23) are respectively installed on the outer sides of both ends of the pipe body (1), and a plurality of installation holes (11) are provided on the outer rings of the air inlet flange (22) and the air outlet flange (23).

7. The method for detecting leakage of smoke exhaust pipe in a power plant according to claim 6, characterized in that: A sealing gasket is provided at one end of the air inlet flange (22) and the air outlet flange (23) away from the pipe body (1).

8. The method for detecting leakage of smoke exhaust pipe in a power plant according to claim 1, characterized in that: A lead screw (10) is fixedly mounted inside the fixed sleeve (9), and the lead screw (10) is threadedly connected to the reciprocating lead screw (6).

9. The method for detecting leakage of smoke exhaust pipe in a power plant according to claim 1, characterized in that: A signal transmitter (21) is fixedly mounted on one side of the fixing sleeve (9) away from the connecting member (8), and the signal transmitter (21) is electrically connected to the motor (15), the smoke sensor (12), and the pressure sensor (13).

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