A solid conduction device for measuring low-temperature economizer pipeline leakage

Abstract

The present invention relates to a solid conduction device for measuring low-temperature economizer pipeline leakage, belonging to the technical field of boiler accessories, comprising a control center and a plurality of detection units, wherein the detection unit comprises an audio sensor, and the detection unit further comprises a probe rod, wherein the audio sensor is fixedly mounted at the end of the probe rod, and the end of the probe rod away from the audio sensor penetrates the insulation layer on the surface of the pipeline body and is fixedly connected to the pipeline body; each of the audio sensors is electrically connected to a signal analyzer, and the signal analyzer is electrically connected to the control center. The present invention can timely and accurately detect pipeline leakage of an economizer, and has a strong anti-interference capability.

Description

Technical Field

[0001] The invention relates to a device for measuring low-temperature economizer pipeline leakage by solid conduction, belonging to the technical field of boiler accessories. Background Art

[0002] Leakage in the low-temperature economizer pipeline will affect the normal operation of the unit, and will also affect the safe operation of the electrostatic precipitator equipment, the environmental protection operating parameters of the electrostatic precipitator and the economy of the unit.

[0003] At present, there are several existing methods for monitoring low-temperature economizer leakage:

[0004] 1. The acoustic wave measurement method is an extended application of the existing boiler tube leakage detection technology. The acoustic wave sensor is installed by opening and welding the conductive tube to monitor the noise inside the low-temperature economizer. However, since the medium flow rate and pressure of the low-temperature economizer are very low, the leakage characteristic sound and operating noise cannot be distinguished after propagation through space, resulting in low measurement accuracy. At the same time, the conductive tube is easily blocked by ash, making the acoustic wave sensor unusable.

[0005] 2. Humidity method is an intuitive measurement method. When a low-temperature economizer leaks, there will definitely be a large amount of water or water mist downstream of its flow field. A humidity probe is installed inside the flue or the flue gas is sucked out to accurately analyze its humidity. At present, most boilers have a compact structure, and the installation position of the low-temperature economizer is very close to the electrostatic precipitator. The flue gas flow rate in the low-temperature economizer part is about 15m / s. Once it enters the electrostatic precipitator, the flue gas flow rate will be reduced to 2-3m / s or even lower. The leaked water flow is difficult to disperse evenly or be well atomized in a short distance. If the leakage point and the humidity monitoring point are very close, the leakage will be detected. If the leakage point and the humidity monitoring point are far apart, the leakage is not easy to be detected. Therefore, this method is inaccurate or delayed.

[0006] 3. The flow differential pressure method is the easiest monitoring method to understand, and does not require a large investment in instruments and funds. By monitoring the flow of the inlet and outlet or the pressure difference between the inlet and outlet, these two parameters will change once a leak occurs. However, it cannot detect early leaks in time. When the parameters change significantly, the leak has already expanded, and there is no guiding significance for actual use.

[0007] A simple low-temperature economizer leakage detection device disclosed in a Chinese utility model patent with publication number CN215893933U includes: a water pressure sensor, a central processing unit, an alarm, a flue gas duct and a condensation duct, wherein the flue gas duct is connected to a smoke exhaust port, the condensation duct is arranged inside the flue gas duct, condensation water is passed into the condensation duct, a water pressure sensor is connected to the inlet and outlet of the condensation duct, the water pressure sensor is connected to the central processing unit, the central processing unit performs pressure judgment, and an alarm is issued through the alarm when the pressure is abnormal.

[0008] The above reference example connects the flue gas duct to the smoke exhaust port and sets a condensation duct inside the flue gas duct. If the leakage point and the monitoring point are far apart, the leakage is not easy to be detected, and there are disadvantages of inaccurate or delayed monitoring, so improvement is urgently needed. Summary of the invention

[0009] In order to overcome the above-mentioned shortcomings in the prior art, the present invention designs a solid conduction device for measuring low-temperature economizer pipeline leakage, which can detect economizer pipeline leakage in a timely and accurate manner and has strong anti-interference ability.

[0010] In order to achieve the above object, the present invention adopts the following technical solution:

[0011] A device for solid conduction measurement of low-temperature economizer pipeline leakage includes a control center and a plurality of detection units, wherein the detection unit includes an acoustic sensor, and the detection unit also includes a probe rod, wherein the acoustic sensor is fixedly installed at the end of the probe rod, and the end of the probe rod away from the acoustic sensor penetrates the insulation layer on the surface of the pipeline body and is fixedly connected to the pipeline body; each of the acoustic sensors is electrically connected to a signal analyzer, and the signal analyzer is electrically connected to the control center.

[0012] Furthermore, the detection units are arranged at equal intervals along the length direction of the pipeline body.

[0013] Furthermore, the probe rod is arranged vertically to the pipeline body.

[0014] Furthermore, a monitoring device is installed outside the probe rod, and the monitoring device includes an installation box, a reciprocating mechanism arranged inside the installation box, a first monitoring camera that can move along the length direction of the probe rod, and a second monitoring camera that can perform reciprocating motion around the probe rod. The reciprocating mechanism includes a driving assembly and a reciprocating assembly that is transmission-connected to the driving assembly, and the reciprocating assembly is transmission-connected to the first monitoring camera and the second monitoring camera, respectively.

[0015] Further, the reciprocating assembly comprises a rotating shaft, an outer ring and an inner ring, the rotating shaft is rotatably mounted inside the installation box, a pair of symmetrically arranged spiral grooves are opened on the surface of the rotating shaft along the length direction of the rotating shaft, and an arc groove is connected between the two ends of the two spiral grooves; an inner ring and an outer ring are rotatably sleeved on the rotating shaft at intervals, and the outer ring is arranged at one end of the rotating shaft close to the audio sensor; an arc plate is integrally fixedly connected between the inner ring and the outer ring, a spiral limiting groove corresponding to one of the spiral grooves is penetrated and opened on the arc plate, a sliding card shaft is slidably clamped in the spiral limiting groove, the bottom end of the sliding card shaft is slidably clamped with the spiral limiting groove, the top end of the sliding card shaft is fixedly connected with a slider, a sliding groove is opened on the installation box along the length direction of the probe rod, the slider is slidably clamped in the sliding groove, and the top end of the slider is fixedly connected with a moving rod arranged in an L shape, the free end of the moving rod is arranged parallel to the probe rod, and the first monitoring camera is fixedly mounted on the free end of the moving rod.

[0016] Furthermore, the outer ring includes an inner step ring and an outer step ring that are integrally connected, the diameter of the outer step ring is larger than the diameter of the inner step ring, and the outer step ring is arranged on the outside of the mounting box; a protrusion is integrally fixedly connected to the side of the outer step ring, and the second monitoring camera is installed on the side of the protrusion close to the audio sensor.

[0017] Furthermore, the driving assembly includes a driving motor for driving the rotating shaft to rotate.

[0018] Furthermore, the installation box is a rectangular box.

[0019] Furthermore, the installation box is fixedly installed on the surface of the insulation layer.

[0020] Furthermore, the protrusion is arranged at a right position of the bottom end of the outer step ring.

[0021] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0022] 1. The present invention can collect the sound of specific characteristics generated by the intense friction between the pipeline medium and the pipeline wall when the pipeline medium leaks at any time through the setting of the control center, the detection unit and the signal analyzer, and then the leakage of the low-temperature economizer can be timely monitored and judged through the control center. By monitoring the audio frequency of solid conduction, not only the monitoring result is accurate, but also the anti-interference ability is strong. The probe rod is directly installed on the surface of the pipeline body, which is not only convenient to install, but also eliminates the step of opening holes, and there is no risk of ash blocking the conduction pipe, which can solve the current problem of accuracy of low-temperature economizer leakage monitoring.

[0023] 2. The present invention, through the setting of the monitoring device, utilizes the reciprocating motion of the slider to drive the first monitoring camera to move along the length direction of the probe rod, and then monitors the state of the probe rod surface through the first monitoring camera, such as whether it is aging, cracks, etc., and can promptly remind the monitoring personnel to carry out maintenance and replacement, and utilizes the reciprocating motion of the arc plate to synchronously drive the outer ring to move, and then drive the second monitoring camera to monitor the installation state of the audio sensor at different positions, which can promptly help the monitoring personnel confirm whether the audio sensor has abnormal conditions such as falling off, thereby improving the maintenance efficiency and reducing the labor intensity of manual maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the main structure of the detection unit and the monitoring device of the present invention;

[0026] Figure 3 is a schematic diagram of the three-dimensional structure of the detection unit of the present invention from a first viewing angle;

[0027] Figure 4 is a schematic diagram of the three-dimensional structure of the detection unit of the present invention from a second viewing angle;

[0028] Figure 5 It is a schematic diagram of the main structure of the internal structure of the installation shell of the present invention;

[0029] Figure 6 It is a schematic diagram of the main structure of the rotating shaft of the present invention;

[0030] Figure 7 It is a bottom view structural schematic diagram of the rotating shaft of the present invention.

[0031] The figures are marked as follows: 1. pipeline body; 2. insulation layer; 3. probe rod; 4. audio sensor; 5. signal analyzer; 6. control center; 7. monitoring device; 8. installation box; 801. sliding groove; 9. rotating shaft; 91. spiral sliding groove; 92. arc sliding groove; 10. outer ring; 101. bump; 102. second monitoring camera; 103. inner step ring; 104. outer step ring; 11. slider; 12. moving rod; 121. first monitoring camera; 13. inner ring; 14. arc plate; 141. spiral limit groove. DETAILED DESCRIPTION

[0032] The present invention is described in more detail below with reference to the embodiments.

[0033] Embodiment 1

[0034] See also Figure 1The solid conduction device for measuring low-temperature economizer pipeline leakage in this embodiment includes a control center 6 and two detection units. The detection unit includes an audio sensor 4. The audio sensor 4 is a solid conduction audio sensor. The audio sensor 4 collects the audio vibration voltage signal on the surface of the pipeline body 1 through a collection circuit board.

[0035] The detection unit further includes a probe rod 3 , an audio sensor 4 is fixedly mounted at the end of the probe rod 3 , and the end of the probe rod 3 away from the audio sensor 4 penetrates the insulation layer 2 on the surface of the pipe body 1 and is fixedly connected to the pipe body 1 .

[0036] In this embodiment, one end of the probe rod 3 is welded to the pipeline body 1 , and the other end is provided with a thread, and the audio sensor 4 is threadedly connected to the probe rod 3 .

[0037] Each audio sensor 4 is electrically connected to a signal analyzer 5, and the signal analyzer 5 is electrically connected to the control center 6. In this embodiment, the signal analyzer 5 is composed of a high-performance digital signal processor and a peripheral acquisition and analysis circuit, and can independently complete signal acquisition, signal filtering and amplification, signal feature analysis and output of calculation results. The results output by the signal analyzer 5 can be sent to the control center in a timely manner, so that the monitoring personnel can detect abnormal conditions in time.

[0038] If the number of detection units needs to be increased, the detection units are arranged at equal intervals along the length direction of the pipeline body 1 .

[0039] Furthermore, the probe rod 3 is arranged vertically to the pipeline body 1 .

[0040] Embodiment 2

[0041] See also Figures 2 to 7 The solid conduction device for measuring low-temperature economizer pipeline leakage in this embodiment is based on the above-mentioned embodiment 1, and a monitoring device 7 is installed outside the probe rod 3.

[0042] Specifically, the monitoring device 7 includes an installation box 8, a reciprocating mechanism arranged inside the installation box 8, a first monitoring camera 121 that can move along the length direction of the probe rod 3, and a second monitoring camera 102 that can perform reciprocating motion around the probe rod 3. The reciprocating mechanism includes a driving component and a reciprocating component that is transmission-connected to the driving component. The reciprocating component is transmission-connected to the first monitoring camera 121 and the second monitoring camera 102, respectively.

[0043] The reciprocating assembly includes a rotating shaft 9, an outer sleeve 10 and an inner sleeve 13. The rotating shaft 9 is rotatably mounted inside the mounting box 8. A pair of symmetrically arranged spiral grooves 91 are provided on the surface of the rotating shaft 9 along the length direction of the rotating shaft 9. Both ends of the two spiral grooves 91 are connected with an arc-shaped groove 92.

[0044] An inner sleeve ring 13 and an outer sleeve ring 10 are provided on the rotating shaft 9 at intervals, and the outer sleeve ring 10 is provided at one end of the rotating shaft 9 close to the audio sensor 4;

[0045] An arc plate 14 is integrally fixedly connected between the inner ring 13 and the outer ring 10, and a spiral limiting groove 141 corresponding to one of the spiral slide grooves 91 is penetrated through the arc plate 14, and a sliding card shaft is slidably clamped in the spiral limiting groove 141, and the bottom end of the sliding card shaft is slidably engaged with the spiral limiting groove 141, and a slider 11 is fixedly connected to the top of the sliding card shaft, and a sliding groove 801 is opened on the installation box 8 along the length direction of the probe rod 3, and the slider 11 is slidably clamped in the sliding groove 801, and a moving rod 12 arranged in an L shape is fixedly connected to the top of the slider 11, and the free end of the moving rod 12 is arranged parallel to the probe rod 3, and the first monitoring camera 121 is fixedly installed on the free end of the moving rod 12.

[0046] The outer ring 10 includes an inner step ring 103 and an outer step ring 104 which are integrally connected. The diameter of the outer step ring 104 is larger than the diameter of the inner step ring 103, and the outer step ring 104 is arranged outside the mounting box 8.

[0047] A protrusion 101 is integrally fixedly connected to the side surface of the outer step ring 104 , and the second monitoring camera 102 is installed on a side of the protrusion 101 close to the audio sensor 4 .

[0048] The driving assembly includes a driving motor for driving the rotating shaft 9 to rotate.

[0049] In this embodiment, the driving motor, the first monitoring camera 121 and the second monitoring camera 102 are all electrically connected to the control center 6 .

[0050] As can be seen from the above description, the control center 6 controls the drive motor to start, and the drive motor drives the rotating shaft 9 to rotate. The rotation of the rotating shaft 9 pushes the sliding card shaft to move through one of the spiral slide grooves 91, and then the sliding card shaft can push the arc plate 14 to rotate, and at this time the slider 11 moves along the direction of the sliding groove 801;

[0051] When the sliding card shaft moves into the arc-shaped slide groove 92, the rotating shaft 9 loses the thrust on the sliding card shaft, and the arc-shaped plate 14 does not move, and the sliding block 11 does not move either;

[0052] When the rotating shaft 9 continues to rotate, the sliding clamping shaft enters another spiral groove 91, and the sliding clamping shaft returns to its original position under the push of the spiral groove 91, and the arc plate 14 and the sliding block 11 return to their original positions, thus performing a reciprocating cycle.

[0053] Through the reciprocating motion of the slider 11, the first monitoring camera 121 can be driven to move along the length direction of the probe rod 3, and then the first monitoring camera 121 can monitor the state of the surface of the probe rod 3, such as whether it is aging, cracked, etc., so as to promptly remind the monitoring personnel to carry out maintenance and replacement. At the same time, the reciprocating motion of the arc plate 14 can synchronously drive the outer ring 10 to move, and then drive the second monitoring camera 102 to monitor the installation state of the audio sensor 4 at different positions, which can promptly help the monitoring personnel confirm whether the audio sensor 4 has abnormal conditions such as falling off, thereby improving the maintenance efficiency and reducing the labor intensity of manual maintenance.

[0054] Furthermore, the installation box 8 is a rectangular box.

[0055] Furthermore, the mounting box 8 is fixedly mounted on the surface of the thermal insulation layer 2 .

[0056] Furthermore, the protrusion 101 is arranged at a right position of the bottom end of the outer step ring 104 .

[0057] The working principle of the present invention: through the setting of the control center 6, the detection unit and the signal analyzer 5, the specific characteristic sound generated by the violent friction between the pipeline medium and the pipeline wall when the pipeline medium leaks can be collected at any time, and then the leakage of the low-temperature economizer can be timely monitored and judged through the control center. By monitoring the audio frequency of solid conduction, not only the monitoring result is accurate, but also the anti-interference ability is strong. The probe rod 3 is directly installed on the surface of the pipeline body 1, which is not only convenient to install, but also eliminates the step of opening holes, and there is no risk of ash blocking the conduction pipe, which can solve the current problem of accuracy of low-temperature economizer leakage monitoring.

[0058] At the same time, the setting of the monitoring device 7, using the reciprocating motion of the slider 11, can drive the first monitoring camera 121 to move along the length direction of the probe rod 3, and then monitor the surface status of the probe rod 3, such as whether it is aging, cracked, etc., through the first monitoring camera 121, so as to promptly remind the monitoring personnel to carry out maintenance and replacement, and use the reciprocating motion of the arc plate 14 to synchronously drive the outer ring 10 to move, and then drive the second monitoring camera 102 to monitor the installation status of the audio sensor 4 at different positions, which can promptly help the monitoring personnel confirm whether the audio sensor 4 has any abnormal conditions such as falling off, thereby improving the maintenance efficiency and reducing the labor intensity of manual maintenance.

[0059] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0060] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A solid conduction device for measuring low-temperature economizer pipeline leakage, comprising a control center (6) and a plurality of detection units, wherein the detection units include an acoustic sensor (4), characterized in that: The detection unit further comprises a probe rod (3), the acoustic sensor (4) being fixedly mounted at the end of the probe rod (3), and the end of the probe rod (3) away from the acoustic sensor (4) passing through the thermal insulation layer (2) on the surface of the pipeline body (1) and then being fixedly connected to the pipeline body (1); Each of the audio sensors (4) is electrically connected to a signal analyzer (5), and the signal analyzer (5) is electrically connected to a control center (6).

2. The device for measuring low-temperature economizer pipeline leakage by solid conduction according to claim 1, characterized in that: The detection units are arranged at equal intervals along the length direction of the pipeline body (1).

3. The device for measuring low-temperature economizer pipeline leakage by solid conduction according to claim 1, characterized in that: The probe rod (3) is arranged vertically on the pipeline body (1).

4. The device for measuring low-temperature economizer pipeline leakage by solid conduction according to claim 1, characterized in that: A monitoring device (7) is installed outside the probe rod (3), and the monitoring device (7) comprises a mounting box (8), a reciprocating mechanism arranged inside the mounting box (8), a first monitoring camera (121) that can move along the length direction of the probe rod (3), and a second monitoring camera (102) that can perform reciprocating motion around the probe rod (3), the reciprocating mechanism comprises a driving component and a reciprocating component that is transmission-connected to the driving component, and the reciprocating component is transmission-connected to the first monitoring camera (121) and the second monitoring camera (102), respectively.

5. The device for measuring low-temperature economizer pipeline leakage by solid conduction according to claim 4, characterized in that: The reciprocating assembly comprises a rotating shaft (9), an outer sleeve ring (10) and an inner sleeve ring (13); the rotating shaft (9) is rotatably mounted inside the mounting box (8); a pair of symmetrically arranged spiral grooves (91) are formed on the surface of the rotating shaft (9) along the length direction of the rotating shaft (9); and an arc-shaped groove (92) is connected between the two ends of the two spiral grooves (91); An inner sleeve ring (13) and an outer sleeve ring (10) are provided on the rotating shaft (9) in a rotationally spaced manner, and the outer sleeve ring (10) is provided at one end of the rotating shaft (9) close to the audio sensor (4); an arc plate (14) is integrally fixedly connected between the inner sleeve ring (13) and the outer sleeve ring (10), and a spiral limiting groove (141) corresponding to one of the spiral grooves (91) is formed through the arc plate (14), and a sliding clamping shaft is provided in the spiral limiting groove (141), and the bottom end of the sliding clamping shaft is The sliding clamping shaft is slidably engaged with the spiral limit groove (141), a slider (11) is fixedly connected to the top end of the sliding clamping shaft, a sliding groove (801) is provided on the installation box (8) along the length direction of the probe rod (3), the slider (11) is slidably engaged in the sliding groove (801), and a moving rod (12) arranged in an L shape is fixedly connected to the top end of the slider (11), the free end of the moving rod (12) is arranged parallel to the probe rod (3), and the first monitoring camera (121) is fixedly installed at the free end of the moving rod (12).

6. The device for measuring low-temperature economizer pipeline leakage by solid conduction according to claim 5, characterized in that: The outer ring (10) comprises an inner step ring (103) and an outer step ring (104) which are connected in one piece, the diameter of the outer step ring (104) is larger than the diameter of the inner step ring (103), and the outer step ring (104) is arranged outside the installation box (8); A convex block (101) is integrally fixedly connected to the side surface of the outer step ring (104), and the second monitoring camera (102) is installed on a side of the convex block (101) close to the audio sensor (4).

7. The device for measuring low-temperature economizer pipeline leakage by solid conduction according to claim 6, characterized in that: The driving assembly comprises a driving motor for driving the rotating shaft (9) to rotate.

8. The device for measuring low-temperature economizer pipeline leakage by solid conduction according to claim 4, characterized in that: The installation box (8) is a rectangular box.

9. The device for measuring low-temperature economizer pipeline leakage by solid conduction according to claim 4, characterized in that: The installation box (8) is fixedly installed on the surface of the thermal insulation layer (2).

10. The device for measuring low-temperature economizer pipeline leakage by solid conduction according to claim 6, characterized in that: The protrusion (101) is arranged at a right position of the bottom end of the outer step ring (104).

Images