A kind of induced draft fan fault monitoring system

Abstract

The application relates to a kind of induced draft fan fault monitoring systems, to induced draft fan monitoring technical field, including coaxial sleeve being arranged in the monitoring ring frame of induced draft fan air outlet side and being arranged in the monitoring module of monitoring ring frame side end, the monitoring module includes the monitoring support fixed on the monitoring ring frame and the monitoring wind wheel rotationally connected to the monitoring support far from the monitoring ring frame one end, the monitoring wind wheel part enters the air outlet of the induced draft fan.It has beneficial effects that whether induced draft fan failure occurs can be monitored in real time.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of induced draft fan monitoring technology, and particularly relates to an induced draft fan fault monitoring system. BACKGROUND

[0002] Induced draft fans are widely used for ventilation and induced draft of boilers and industrial furnaces. As one of the important auxiliary systems of thermal power plants, the economy, safety and reliability of the induced draft fan system are of great significance to the entire unit.

[0003] If the induced draft fan fails without being detected in time, it is very easy to cause production accidents. SUMMARY

[0004] (I) Technical problem to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides an induced draft fan fault monitoring system, which solves the technical problem that the induced draft fan cannot be monitored in real time.

[0006] (II) Technical scheme

[0007] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present application comprises:

[0008] The embodiment of the present application provides an induced draft fan fault monitoring system, which comprises a monitoring ring frame coaxially sleeved on one side of an air outlet of an induced draft fan and a monitoring module arranged at a side end of the monitoring ring frame. The monitoring module comprises a monitoring support fixed on the monitoring ring frame and a monitoring wind wheel rotatably connected to an end of the monitoring support away from the monitoring ring frame. The monitoring wind wheel partially extends into the air outlet of the induced draft fan.

[0009] The induced draft fan fault monitoring system provided by the embodiment of the present application can monitor in real time, and the monitoring method is very convenient.

[0010] Optionally, the monitoring module is provided in multiple groups, and the multiple groups of monitoring modules are arranged at the side end of the monitoring ring frame in a circumferential interval.

[0011] By arranging multiple groups of monitoring modules, on the one hand, the monitoring result can be more accurate, and on the other hand, the influence caused by foreign matter entering the air outlet of the induced draft fan can be reduced.

[0012] Optionally, the monitoring support comprises a first support perpendicular to the monitoring ring support axis and connected to the monitoring ring support, and a second support connected to the first support in a sliding manner along the length direction of the first support, and the monitoring wind wheel is fixed to one end of the second support away from the first support.

[0013] The monitoring support comprises a first support and a second support, and the second support is connected to the first support in a sliding manner, so that the distance between the second support and the monitoring ring support can be adjusted, and the length of the monitoring wind wheel extending into the air outlet of the induced draft fan can be adjusted to achieve better monitoring effect.

[0014] Optionally, a plurality of first fixing holes perpendicular to the length direction of the first support are arranged on the first support in a spaced manner along the length direction of the first support, and a second fixing hole aligning with any one of the first fixing holes in a sliding manner is arranged on the second support, and a fixing bolt is arranged in the second fixing hole, and the fixing bolt is inserted into any one of the first fixing holes to fix the second support.

[0015] By moving the position of the second support and then inserting the fixing bolt through the second fixing hole and a first fixing hole, the second support and the first support are fixed, so that the fixing of the second support after sliding is more convenient.

[0016] Optionally, the second support comprises a first sub-support connected to the first support in a sliding manner, a second sub-support connected to one end of the first sub-support away from the monitoring ring support in a perpendicular manner, and a third sub-support connected to one end of the second sub-support away from the first sub-support in a perpendicular manner, and the monitoring wind wheel is connected to one end of the third sub-support away from the second sub-support in a rotating manner, and a retaining slide block is arranged on the side end of the third sub-support close to the first sub-support, and a retaining frame is arranged on the circumferential end of the monitoring ring support, and a retaining slide slot is arranged on the retaining frame for sliding insertion of the retaining slide block.

[0017] By moving the monitoring wind wheel driven by the second support, when the monitoring wind wheel is blown by the wind power of the air outlet of the induced draft fan, the second support may shake, which affects the accuracy of monitoring and the service life. In this scheme, the retaining slide block on the side end of the third sub-support is slidingly inserted into the retaining slide slot of the retaining frame, which improves the stability of the second support, reduces shaking, and prolongs the service life of the monitoring system.

[0018] Optionally, a buffer rubber layer is arranged on the inner wall of the retaining slide slot.

[0019] By the buffer rubber layer, the probability of rigid collision between the retaining slide block and the inner wall of the retaining slide slot is reduced, and the collision damage caused by vibration is reduced, thereby prolonging the service life of the monitoring system.

[0020] Optionally, the third sub-frame is provided with a fault light at one end away from the monitoring wind wheel, which monitors the rotating speed of the monitoring wind wheel to realize lighting or extinguishing.

[0021] By providing the fault light on the third sub-frame, when the rotating speed of the monitoring wind wheel is within a certain value, the fault light is not lit, and when the rotating speed of the monitoring wind wheel is reduced to a certain degree, the fault light is lit, thereby prompting that the induced draft fan may be faulty.

[0022] Optionally, the inner circumferential wall of the monitoring ring frame is coaxially detachably connected with an adapter ring which is clamped at the air outlet of the induced draft fan.

[0023] By detachably connecting the adapter ring with the inner circumferential wall of the monitoring ring frame, the monitoring ring frame can be adapted to the induced draft fan with different diameter air outlets by replacing the adapter ring with different inner diameters, thereby making the monitoring system more convenient for monitoring the faults of different models of induced draft fans.

[0024] Optionally, the inner circumferential wall of the monitoring ring frame is provided with a fixed sliding groove along the length direction thereof, the outer circumferential wall of the adapter ring is provided with a fixed sliding block which is slidably inserted into the fixed sliding groove, and the monitoring ring frame is provided with a limiting ring which covers the opening of the fixed sliding groove.

[0025] When the monitoring ring frame and the adapter ring are fixed, the fixed sliding block at the outer circumferential side end of the adapter ring is aligned with the fixed sliding groove of the inner circumferential wall of the monitoring ring frame and is inserted, and then the limiting ring is fixed at one end of the monitoring ring frame, so that the limiting ring blocks the opening of the fixed sliding groove, thereby fixing the adapter ring in the inner ring of the monitoring ring frame. This scheme makes the replacement of the adapter ring more convenient.

[0026] Optionally, the rotating axis of the monitoring wind wheel is parallel to the axis of the monitoring ring frame.

[0027] The rotating axis of the monitoring wind wheel is parallel to the axis of the monitoring ring frame, so that the direction of rotation of the monitoring wind wheel is certain when it is blown by the wind, thereby reducing the control variable and making the monitoring result more accurate.

[0028] (Three) beneficial effects

[0029] The beneficial effects of the present application are as follows: when the induced draft fan works, the air outlet end of the induced draft fan will blow air outward, at this time, the blown air will drive the monitoring wind wheel to rotate, the working power of the induced draft fan is constant, so the blown air is relatively stable, thereby the monitoring wind wheel can rotate at a certain rotating speed at all times, once the induced draft fan is faulty, the air speed blown from the air outlet of the induced draft fan will be reduced, thereby causing the rotating speed of the monitoring wind wheel to be reduced, so as to monitor whether the induced draft fan is faulty, thereby realizing real-time monitoring. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1A perspective view of an embodiment of the present application;

[0031] Figure 2 A partial explosion view of an embodiment of the present application from another perspective.

[0032] Figure 3 A partial explosion view of an embodiment of the present application from another perspective.

[0033] BRIEF DESCRIPTION OF DRAWINGS

[0034] 1, monitoring ring; 11, fixed sliding groove; 12, limiting ring; 13, retainer; 131, retainer sliding groove; 132, buffer rubber layer; 14, main ring; 141, motor; 1411, gear; 142, rotating ring; 143, ball; 15, auxiliary ring; 151, gear ring; 2, monitoring module; 21, monitoring support; 211, first support; 2111, first fixed hole; 212, second support; 2121, first sub support; 2122, second sub support; 2123, third sub support; 2124, second fixed hole; 2125, fixed bolt; 2126, retaining sliding block; 22, monitoring wind wheel; 3, adaptive ring; 31, fixed sliding block; 4, fault light. DETAILED DESCRIPTION

[0035] In order to better explain the present application, in order to facilitate understanding, the following will be combined with the drawings, through specific embodiments, the present application is described in detail.

[0036] The induced draft fan failure monitoring system provided by the embodiment of the present application, when the induced draft fan works, the air outlet end of the induced draft fan will blow air outward, at this time, the blown air will blow the monitoring wind wheel to rotate, the working power of the induced draft fan is constant, so the blown air will be relatively stable, and then the monitoring wind wheel can rotate at a certain rotating speed, once the induced draft fan fails, the air speed blown from the air outlet of the induced draft fan will be reduced, and then the rotating speed of the monitoring wind wheel is reduced, so as to monitor whether the induced draft fan fails, and thus real-time monitoring is carried out.

[0037] In order to better understand the above technical solution, the following will be combined with the drawings to describe the exemplary embodiments of the present application in more detail. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a clearer, more thorough understanding of the present application, and to enable the scope of the present application to be completely conveyed to those skilled in the art.

[0038] Referring to Figure 1 and Figure 2 A kind of induced draft fan failure monitoring system, including coaxial sleeve monitoring ring 1 set to the air outlet side of induced draft fan and monitoring module 2 being set to the side end of monitoring ring 1.

[0039] The inner circumferential wall of the monitoring ring 1 is coaxially detachably connected with an adapter ring 3, the adapter ring 3 can be tightly clamped at the air outlet of the induced draft fan, one end surface of the monitoring ring 1 is provided with a fixed sliding groove 11 along the length direction of the monitoring ring 1, the fixed sliding groove 11 is communicated to the inner ring of the monitoring ring 1, the outer circumferential wall of the adapter ring 3 is integrally provided with a fixed sliding block 31 which is slidably inserted into the fixed sliding groove 11, the monitoring ring 1 is fixed with a limiting ring 12 at the opening of the fixed sliding groove 11 through bolts, and the limiting ring 12 covers the opening of the fixed sliding groove 11. So that the monitoring ring 1 and the adapter ring 3 are fixed together.

[0040] The monitoring module 2 is provided with multiple groups, and the multiple groups of monitoring modules 2 are arranged at the circumferential side end of the monitoring ring 1, each group of monitoring modules 2 includes a monitoring bracket 21 fixed on the monitoring ring 1 and a monitoring wind wheel 22 rotationally connected to one end of the monitoring bracket 21 away from the monitoring ring 1, and the monitoring wind wheel 22 partially extends into the air outlet of the induced draft fan.

[0041] Referring to Figure 2 and Figure 3 , the monitoring bracket 21 includes a first bracket 211 perpendicular to the axis of the monitoring ring 1 and welded to the outer circumferential wall of the monitoring ring 1, and a second bracket 212 slidably inserted into the first bracket 211 along the length direction of the first bracket 211, the first bracket 211 is provided with a plurality of first fixing holes 2111 perpendicular to the length direction of the first bracket 211, the second bracket 212 includes a first sub-bracket 2121 parallel to the first bracket 211, a second sub-bracket 2122 integrally and perpendicularly connected to one end of the first sub-bracket 2121 away from the monitoring ring 1, and a third sub-bracket 2123 perpendicularly connected to one end of the second sub-bracket 2122 away from the first sub-bracket 2121, the first sub-bracket 2121 is provided with a second fixing hole 2124 aligned with any one of the first fixing holes 2111, and a fixing bolt 2125 is arranged in the second fixing hole 2124 and inserted into any one of the first fixing holes 2111 to fix the second bracket 212.

[0042] The monitoring wind wheel 22 is rotationally connected to one end of the third sub-bracket 2123 away from the second sub-bracket 2122 through a rotating shaft, and the rotating axis of the monitoring wind wheel 22 is parallel to the axis of the monitoring ring 1.

[0043] The outer circumferential wall of the monitoring ring 1 is perpendicularly welded with a plurality of retaining frames 13, the retaining frames 13 are located on the side away from the limiting ring 12, the side end of the third sub-bracket 2123 close to the first sub-bracket 2121 is welded with a retaining sliding block 2126, the side end of the retaining frame 13 is provided with a retaining sliding groove 131 for the retaining sliding block 2126 to slide and insert, and the retaining frame 13 is adhered with a buffer rubber layer 132 on the inner wall of the retaining sliding groove 131, so that the retaining sliding block 2126 abuts against the buffer rubber layer 132, and the probability of rigid collision between the retaining sliding block 2126 and the inner wall of the retaining sliding groove 131 is reduced through the buffer rubber layer 132.

[0044] The third sub-frame 2123 is fixed with a fault lamp 4 at one end away from the monitoring wind wheel 22, and the fault lamp 4 is used for monitoring the rotating speed of the monitoring wind wheel 22 to realize lighting or extinguishing, so that when the rotating speed of the monitoring wind wheel 22 is within a certain value, the fault lamp 4 is not lighted, and when the rotating speed of the monitoring wind wheel 22 is reduced to a certain degree, the fault lamp 4 is lighted, thereby prompting that the induced draft fan may be faulty.

[0045] Referring to Figure 3 The monitoring ring frame 1 comprises a main ring frame 14 for mounting the adapter ring 3 and a secondary ring frame 15 for mounting the monitoring module 2, the main ring frame 14 and the secondary ring frame 15 are coaxially arranged, and the main ring frame 14 is coaxially integrally formed with a rotating ring frame 142 at one end surface close to the secondary ring frame 15, the rotating ring frame 142 is coaxially rotatably inserted into the secondary ring frame 15, the outer peripheral wall of the rotating ring frame 142 is rotatably embedded with a ball 143, the ball 143 abuts against the inner peripheral wall of the secondary ring frame 15, so that the main ring frame 14 and the secondary ring frame 15 are relatively rotatable, and the outer peripheral wall of the secondary ring frame 15 is coaxially welded with a tooth ring 151 at one side close to the main ring frame 14, the outer peripheral wall of the main ring frame 14 is fixed with a motor 141 through bolts, the output shaft of the motor 141 is parallel to the axis of the main ring frame 14, the output shaft of the motor 141 is coaxially keyed connected with a gear 1411, and the gear 1411 is engaged with the tooth ring 151, so that the secondary ring frame 15 can be uniformly rotated by the motor 141. When monitoring abnormality occurs, the secondary ring frame 15 can be rotated, so that different monitoring wind wheels 22 are moved to the abnormal point for monitoring, the monitoring abnormality caused by damage of individual monitoring wind wheels 22 is avoided, and the monitoring is more accurate.

[0046] In the description of the present application, it should be understood that the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0047] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless otherwise explicitly specified and limited, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature is "over", "above" and "on top of" a second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature is "under", "below" and "underneath" a second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0049] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0050] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A fault monitoring system for induced draft fans, characterized in that: The system includes a monitoring ring frame (1) coaxially sleeved on one side of the exhaust outlet of the induced draft fan and a monitoring module (2) disposed on the side end of the monitoring ring frame (1). The monitoring module (2) includes a monitoring bracket (21) fixed on the monitoring ring frame (1) and a monitoring impeller (22) rotatably connected to the end of the monitoring bracket (21) away from the monitoring ring frame (1). The monitoring impeller (22) partially extends into the exhaust outlet of the induced draft fan. Multiple sets of monitoring modules (2) are provided, and multiple sets of monitoring modules (2) are arranged circumferentially at intervals on the side end of the monitoring ring frame (1). The monitoring bracket (21) includes a first bracket (211) perpendicular to the axis of the monitoring ring frame (1) and connected to the monitoring ring frame (1) and along the first axis. A second support is slidably connected to the first support (211) along its length. The monitoring impeller (22) is fixed to the end of the second support away from the first support (211). The second support includes a first sub-frame (2121) slidably connected to the first support (211), a second sub-frame (2122) vertically connected to the end of the first sub-frame (2121) away from the monitoring ring frame (1), and a third sub-frame (2123) vertically connected to the end of the second sub-frame (2122) away from the first sub-frame (2121). The monitoring impeller (22) is rotatably connected to the end of the third sub-frame (2123) away from the second sub-frame (2122). The third sub-frame (2123) is close to the end of the first sub-frame (2122). The first subframe (2121) is provided with a retaining slider (2126) on its side end, and the monitoring ring frame (1) is provided with a retaining frame (13) on its peripheral side end. The retaining frame (13) is provided with a retaining groove (131) for the retaining slider (2126) to slide and insert. The monitoring ring frame (1) is coaxially and detachably connected to an adapter ring (3) that is clamped to the air outlet of the induced draft fan. The monitoring ring frame (1) includes a main ring frame (14) for installing the adapter ring (3) and a secondary ring frame (15) for installing the monitoring module (2). The main ring frame (14) and the secondary ring frame (15) are arranged coaxially. A rotating ring frame (142) is integrally formed coaxially on one end face of the main ring frame (14) near the secondary ring frame (15). The rotating ring frame (142) rotates coaxially. The rotating ring is inserted into the secondary ring frame (15). The outer peripheral wall of the rotating ring frame (142) is fitted with ball bearings (143), which abut against the inner peripheral wall of the secondary ring frame (15), causing the main ring frame (14) and the secondary ring frame (15) to rotate relative to each other. A toothed ring (151) is coaxially welded to the outer peripheral wall of the secondary ring frame (15) on the side close to the main ring frame (14). A motor (141) is fixed to the outer peripheral wall of the main ring frame (14) by bolts. The output shaft of the motor (141) is parallel to the axis of the main ring frame (14). A gear (1411) is coaxially keyed to the output shaft of the motor (141). The gear (1411) meshes with the toothed ring (151), so that the secondary ring frame (15) can be driven to rotate at a constant speed by the motor (141).When a monitoring anomaly is detected, the secondary ring frame (15) is rotated, causing different monitoring rotors (22) to move to the anomaly point for monitoring.

2. The induced draft fan fault monitoring system as described in claim 1, characterized in that: The first bracket (211) has a plurality of first fixing holes (2111) spaced apart along its own length direction and perpendicular to its own length direction. The second bracket has a second fixing hole (2124) that slides and aligns with any one of the first fixing holes (2111). A fixing bolt (2125) passes through the second fixing hole (2124) and is inserted into any one of the first fixing holes (2111) to fix the second bracket.

3. The induced draft fan fault monitoring system as described in claim 1, characterized in that: The retainer (13) has a buffer adhesive layer (132) on the inner wall of the retaining groove (131).

4. The induced draft fan fault monitoring system as described in claim 1, characterized in that: The third subframe (2123) is equipped with a fault light (4) at the end away from the monitoring wind turbine (22) to monitor the rotational speed of the monitoring wind turbine (22) and thus turn it on or off.

5. The induced draft fan fault monitoring system as described in claim 1, characterized in that: The monitoring ring frame (1) has a fixed groove (11) on its inner peripheral wall along its length direction. The adapter ring (3) has a fixed slider (31) on its outer peripheral wall that slides into the fixed groove (11). The monitoring ring frame (1) is covered with a limit ring (12) at the opening of the fixed groove (11).

6. The induced draft fan fault monitoring system as described in claim 1, characterized in that: The rotation axis of the monitoring wind turbine (22) is parallel to the axis of the monitoring ring frame (1).

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