Quick replacement device for damper door of outlet flue of economizer

Abstract

The invention belongs to the technical field of flue damper doors, and discloses an economizer outlet flue damper door quick replacement device which comprises a door frame, a partition plate is fixedly connected to the middle of the door frame, and driving motors are fixedly connected to the two sides of the door frame through mounting frames. The rotating clamping plates are pushed to rotate towards the outer side, the inclined plane telescopic plates are popped out, the turning plate single blades and the adjacent turning plate single blades are staggered under the pushing of the inclined plane telescopic plates, then the turning plate single blades can be quickly disassembled and replaced, the whole baffle door does not need to be disassembled in the whole replacement process, and the replacement efficiency is improved. Single blade replacement can be completed only by operating the rotating clamping plate, the maintenance time is greatly shortened, the first positioning clamping plate and the second positioning clamping plate are matched, it is guaranteed that the replaced single blade of the turning plate is parallel to an original blade, and the problem of uneven airflow caused by installation deviation is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of flue damper doors, and in particular is a device for quickly replacing flue damper doors at an economizer outlet. Background Art

[0002] At present, the damper door of the economizer outlet flue is mainly a double-row three-linked flap door made of stainless steel. The flap switch is driven by electric control to control the flue gas flow path or flow.

[0003] Prior art document publication number CN101586431A discloses a flap-type insulating door. It comprises a door frame, a door panel, and a drive mechanism. It is characterized by an air duct, with the door frame fixed to one end of the air duct's outlet. The door panel is located inside the door frame, hingedly connected to the upper edge of the door panel and the upper edge of the door frame. A sealing strip surrounds the door panel and the door frame. Above the air inlet and outlet ends of the air duct are fixed pin holders and stop pin holders, respectively. A through-hole is defined in the upper wall of the air duct, inside the stop pin holders. One end of the drive mechanism is hingedly connected to the fixed pin holder, while the other end is hingedly connected to the outer surface of the door panel via a hinged driving arm, a driven arm, and a connecting rod, passing through the through-hole. Stop pin holes are located in the middle of the driving arm and at the upper end of the stop pin holder. When the door is open, the driving arm is secured to the stop pin holder via the stop pin and the stop pin hole. This flap-type insulating door offers excellent sealing, reduces the temperature inside the coal mill, and improves safety during inspection and maintenance. It is suitable for isolating the hot air at the inlet of the coal mill when repairing it. Although the sealing performance of the flap door has been structurally optimized, the ash content in the flue gas has increased due to the blending of economic coal in recent years, the wear of the baffle door and door shaft of the economizer outlet flue has intensified, and the baffle door of the coal furnace has broken its door shaft and the door panel has fallen off. As a result, the flue gas temperature at the denitrification inlet cannot be finely adjusted, which seriously affects the safety of the unit during deep adjustment. Therefore, it is necessary to optimize the replacement structure of the flap door. Summary of the Invention

[0004] In order to solve the problems of increased wear of the outlet flue damper door and door shaft, broken door shaft and falling off of the damper door of the coal furnace raised in the above background technology, the present invention provides a quick replacement device for the economizer outlet flue damper door.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a quick replacement device for a flue damper door at an economizer outlet, comprising a door frame, a partition being fixedly connected to the middle of the door frame, a drive motor being fixedly connected to both sides of the door frame via a mounting bracket, the drive motor being connected to a single flap leaf via a connecting member, the single flap leaf being movably connected between the door frame and the partition, and further comprising:

[0006] A quick-change mechanism, located on both sides of the door frame;

[0007] an auxiliary latching mechanism connected to the partition;

[0008] Wherein, the quick-change mechanism includes side shafts rotatably connected to both sides of the door frame, and three pairs of side shafts are symmetrically arranged.

[0009] Preferably, the quick replacement mechanism also includes a first positioning clamp and a rotating clamp, the first positioning clamp is fixed to one side of the end of the side shaft, and the rotating clamp is rotatably connected to the other side of the end of the side shaft; the replacement process does not require disassembly of the entire baffle door, and only the rotating clamp needs to be operated to complete the single leaf replacement, which greatly shortens the maintenance time.

[0010] Preferably, the first positioning splint, rotating splint and flap leaf are fixed together by bolts, and the end of the side shaft is fixed to the connecting piece; before replacing the flap leaf, it is necessary to ensure that the flue damper door is in a completely closed state, and cut off the power supply of the electric control drive device, and remove the limit bolts first so that subsequent operations can proceed smoothly.

[0011] Preferably, a sliding groove is provided in the middle of the side shaft, an inclined telescopic plate is slidably connected in the sliding groove, and the inclined telescopic plate is elastically connected to the inner cavity of the side shaft.

[0012] Preferably, triangular grooves are provided on both sides of the inclined telescopic plate, and the inclined telescopic plate abuts against a single leaf of the flap through the inclined end.

[0013] Preferably, an arc groove plate is fixed to the middle of the rotating clamping plate, and the arc groove plate is slidably connected to a pair of sliding plates through sliding columns, and the sliding plates are slidably connected to the inner cavity of the side shaft.

[0014] Preferably, a pair of sliding plates are fixed with arc-edge protrusions on one side close to each other, and the arc-edge protrusions slide and abut against the triangular groove; when resetting, due to the oblique edge design of the triangular groove, the movement of the arc-edge protrusions will exert an inward pressure on the inclined telescopic plate, causing it to overcome the spring force and retract along the sliding groove until it is fully reset.

[0015] Preferably, the auxiliary locking mechanism includes a central axis rotatably connected to the middle of the partition, and the central axis and the side wall of the partition are jointly provided with a groove.

[0016] Preferably, a sliding clamp is slidably connected in the groove, and the sliding clamp is slidably connected to the central axis through a guide column.

[0017] Preferably, a second positioning clamp is fixed to the side of the central axis end away from the sliding clamp, and the sliding clamp, the second positioning clamp and the flap leaf are fixed together by bolts; when installing a new flap leaf, its edge must first be placed between the first positioning clamp and the second positioning clamp, the first positioning clamp is used to fix one side of the flap leaf, and the second positioning clamp ensures the parallelism of the flap leaf through the adjustment of the sliding clamp.

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

[0019] The present invention cooperates with structures such as a rotating splint, a sliding splint and an inclined telescopic plate, thereby facilitating the individual removal of a flap leaf without interfering with other blades, pushing the rotating splint to rotate outward, and finally causing the inclined telescopic plate to pop out outward along the slide groove. Under the push of the inclined telescopic plate, the flap leaf and the adjacent flap leaf are misaligned, so that they are separated from their original installation position, and can be quickly disassembled and replaced. The entire replacement process does not require disassembly of the entire baffle door. The single leaf replacement can be completed by operating the rotating splint, which greatly shortens the maintenance time. The cooperation of the first positioning splint and the second positioning splint ensures that the replaced flap leaf remains parallel to the original leaf, avoiding the problem of uneven airflow caused by installation deviation. At the same time, the widened splints on both sides of the flap leaf disperse the stress borne by the door shaft, so that the flap leaf receives part of the stress, reducing the loss of the door shaft.

[0020] The present invention realizes the automatic resetting of the quick-change mechanism by arranging the coordination of structures such as the arc groove plate, the sliding column and the triangular groove. The return movement of the arc groove plate pulls the sliding plate to the initial position through the sliding column. During this process, the arc-edge protrusion re-enters the triangular groove and slides along its oblique side. Due to the oblique side design of the triangular groove, the movement of the arc-edge protrusion will exert an inward pressure on the inclined telescopic plate, causing it to overcome the spring force and retract along the slide until it is fully reset. When the inclined telescopic plate is fully retracted, the two sides of the flap single leaf are clamped by the first positioning splint and the second positioning splint respectively, reducing the complexity of manual adjustment. This mechanism is suitable for various types of industrial flue damper doors, especially for rapid maintenance needs in high dust and high temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0023] Figure 3 For the present invention Figure 1 A schematic diagram of the partially enlarged structure at point B in the middle;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 5 A schematic diagram of the structural coordination relationship between the partition and the sliding splint of the present invention;

[0026] Figure 6 This is a schematic diagram of the top view of the structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the structural coordination relationship between the sliding splint and the flap leaf of the present invention;

[0028] Figure 8 This is a schematic diagram of the structural coordination relationship between the rotating clamping plate and the first positioning clamping plate of the present invention;

[0029] Figure 9 Schematic diagram of the structural coordination relationship between the arc trough plate and the sliding column of the present invention;

[0030] Figure 10 It is a schematic diagram of the structural matching relationship between the triangular groove and the arc-edge protrusion of the present invention.

[0031] In the picture:

[0032] 1. Door frame; 2. Partition; 3. Connector; 4. Drive motor; 5. Single flap; 6. Quick-change mechanism; 61. Side shaft; 62. Rotating splint; 63. Arc groove plate; 64. Sliding plate; 65. Inclined telescopic plate; 66. Triangular groove; 67. Slide groove; 68. First positioning splint; 69. Sliding column; 610. Arc edge protrusion; 7. Auxiliary locking mechanism; 71. Sliding splint; 72. Guide column; 73. Central shaft; 74. Second positioning splint; 75. Groove. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] like Figures 1 to 10 As shown, the present invention provides a quick replacement device for a flue damper door at an economizer outlet, comprising a door frame 1, a partition 2 fixedly connected to the middle of the door frame 1, a drive motor 4 fixedly connected to both sides of the door frame 1 via a mounting frame, the drive motor 4 being connected to a single flap leaf 5 through a connecting member 3, the single flap leaf 5 being movably connected between the door frame 1 and the partition 2, and further comprising:

[0035] A quick-change mechanism 6 is located on both sides of the door frame 1;

[0036] Auxiliary locking mechanism 7, the auxiliary locking mechanism 7 is connected to the partition 2;

[0037] The quick-change mechanism 6 includes side shafts 61 rotatably connected to both sides of the door frame 1 , and three pairs of side shafts 61 are symmetrically arranged.

[0038] Using the above solution: Before replacing flap 5, ensure the flue damper door is fully closed and disconnect the power to the electronic control drive to prevent accidental operation that could cause the equipment to operate. Also, check the corresponding limiter mechanism to confirm that it is in an adjustable position. If any limit bolts are present, remove them first to ensure smooth subsequent operation.

[0039] like Figure 2 As shown, the quick-change mechanism 6 also includes a first positioning clamp 68 and a rotating clamp 62. The first positioning clamp 68 is fixed to one side of the end of the side shaft 61, and the rotating clamp 62 is rotatably connected to the other side of the end of the side shaft 61; the first positioning clamp 68, the rotating clamp 62 and the flap leaf 5 are fixed together by bolts, and the end of the side shaft 61 is fixed to the connecting member 3.

[0040] like Figure 9 and Figure 10 As shown, a sliding groove 67 is provided in the middle of the side shaft 61, and an inclined telescopic plate 65 is slidably connected in the sliding groove 67, and the inclined telescopic plate 65 is elastically connected to the inner cavity of the side shaft 61; triangular grooves 66 are provided on both sides of the inclined telescopic plate 65, and the inclined telescopic plate 65 abuts on the flap single leaf 5 through the inclined end; an arc groove plate 63 is fixed to the middle of the rotating splint 62, and the arc groove plate 63 is slidably connected to a pair of sliding plates 64 through a sliding column 69, and the sliding plate 64 is slidably connected to the inner cavity of the side shaft 61; an arc edge protrusion 610 is fixed to the side of the pair of sliding plates 64 close to each other, and the arc edge protrusions 610 are all slidably abutted in the triangular groove 66.

[0041] The above solution employs a connecting member 3 consisting primarily of connecting plates, bolts, and steel plates. The connecting plates are fixedly connected to the side shafts 61. Multiple side shafts 61 are then connected in series via the steel plates and bolts, ensuring synchronous actuation of the flap leaves 5. A slot is defined on the inner wall of the door frame 1 for the rotating clamping plate 62 to pivot and engage. To replace a flap leaf 5, the operator manually pushes the rotating clamping plate 62 outward, rotating it around the side shaft 61. Because the rotating clamping plate 62 is fixedly connected to the arc-shaped slot plate 63, its rotation compresses the sliding post 69 through its curved slot structure. The sliding post 69 is rigidly connected to the sliding plate 64. Therefore, the movement of the arc-shaped slot plate 63 pushes the sliding plate 64 toward the quick-change mechanism 6. The movement of the sliding plate 64 causes the arc-shaped protrusion 610 on it to slide within the triangular slot 66. When the arc-shaped protrusion 610 reaches the end of the oblique edge of the triangular slot 66, it escapes the restraint of the inclined telescopic plate 65. At this point, the inclined telescopic plate 65 is no longer suppressed by the arc-edge protrusion 610. Under the elastic force of the internal spring, the inclined telescopic plate 65 pops outward along the slide groove 67. Driven by the inclined telescopic plate 65, the flap leaf 5 is misaligned with the adjacent flap leaf, causing it to be dislocated from its original installation position. This misalignment design allows the flap leaf 5 to be removed individually without interfering with other leaves, thus avoiding the tedious operation of overall disassembly. When the flap leaf 5 is completely out of its original position, the operator can easily remove it from the baffle door frame. Since the entire replacement process only requires pushing and rotating the splint 62 and utilizing a mechanical linkage mechanism, no additional disassembly tools are required, thereby greatly improving replacement efficiency.

[0042] like Figure 3 、 Figure 7 and Figure 8 As shown, the auxiliary locking mechanism 7 includes a central axis 73 rotatably connected to the middle part of the partition 2, and the central axis 73 and the side wall of the partition 2 are jointly provided with a groove 75, and a sliding clamp 71 is slidably connected in the groove 75, and the sliding clamp 71 is slidably clamped on the central axis 73 through a guide column 72; a second positioning clamp 74 is fixedly connected to the side of the end of the central axis 73 away from the sliding clamp 71, and the sliding clamp 71, the second positioning clamp 74 and the flap single leaf 5 are fixed together by bolts.

[0043] The above solution is adopted: during installation, the edge of the new flap leaf 5 is placed between the first positioning clamp 68 and the second positioning clamp 74. The rotating clamp 62 is rotated in the opposite direction, causing it to drive the arc groove plate 63 back to its original position. The return movement of the arc groove plate 63 pulls the sliding plate 64 to its initial position via the sliding column 69. During this process, the arc-edge protrusion 610 re-enters the triangular groove 66 and slides along its oblique edge. Due to the oblique edge design of the triangular groove 66, the movement of the arc-edge protrusion 610 exerts inward pressure on the inclined telescopic plate 65, causing it to overcome the spring force and retract along the sliding groove 67 until it is fully restored. When the inclined telescopic plate 65 is fully retracted, the two sides of the flap leaf 5 are clamped by the first positioning clamp 68 and the second positioning clamp 74 respectively. At this point, the parallelism of the flap leaf 5 is consistent with that of the adjacent leaves, and its axial direction is aligned with the side axis 61 and the central axis 73, ensuring the synchronization of the entire baffle door during operation.

[0044] The working principle and use process of the present invention:

[0045] Before replacing the flap blade 5, ensure that the flue damper door is fully closed and disconnect the power supply to the electronically controlled drive unit to prevent misoperation that could cause the equipment to operate. At the same time, check the limiting mechanisms of the rotating clamp 62 and the sliding clamp 71 to confirm that they are in an adjustable state. If there are limiting bolts, they must be removed first to ensure smooth subsequent operation. The first step in replacing the flap blade 5 is to release the limiting mechanisms of the rotating clamp 62 and the sliding clamp 71. The operator must manually push the rotating clamp 62 outward, rotating it around the side axis 61. Because the rotating clamp 62 is fixedly connected to the arc groove plate 63, when the rotating clamp 62 rotates, the arc groove plate 63 moves with it and squeezes the slide post 69 through its arc-shaped slide groove structure. The slide post 69 is rigidly connected to the sliding plate 64, so the movement of the arc groove plate 63 pushes the sliding plate 64 toward the quick-change mechanism 6. The movement of the sliding plate 64 causes the arc-shaped protrusion 610 on it to slide within the triangular groove 66. When the arc-edge protrusion 610 slides to the end of the hypotenuse of the triangular groove 66, it escapes the constraint range of the inclined telescopic plate 65. At this time, the inclined telescopic plate 65 is no longer suppressed by the arc-edge protrusion 610, and under the elastic force of the internal spring, the inclined telescopic plate 65 pops outward along the slide groove 67. Since the hypotenuse of the inclined telescopic plate 65 contacts the edge of the flap leaf 5, its pop-up action will apply a lateral thrust to the flap leaf 5, causing it to move away from the first positioning clamp 68. Under the push of the inclined telescopic plate 65, the flap leaf 5 is misaligned with the adjacent flap leaf, causing it to be dislocated from its original installation position. This misalignment design allows the flap leaf 5 to be taken out separately without interfering with other leaves, thereby avoiding the tedious operation of overall disassembly. At the same time, the movement of the flap leaf 5 will drive the sliding clamp 71 to move synchronously, causing it to slide along the groove 75. The guide post 72 ensures that the sliding clamp 71 maintains horizontal movement, preventing it from shifting or getting stuck during sliding, thereby ensuring a smooth replacement process. Once the flap 5 is completely free of its original position, the operator can easily remove it from the baffle door frame. Since the entire replacement process only requires pushing and rotating the clamp 62 and utilizing a mechanical linkage mechanism, no additional removal tools are required. This greatly improves replacement efficiency and is particularly suitable for industrial environments requiring frequent maintenance.

[0046] When installing a new flap leaf 5, its edge must first be placed between the first positioning clamp 68 and the second positioning clamp 74. The first positioning clamp 68 is used to secure one side of the flap leaf 5, while the second positioning clamp 74 ensures the parallelism of the flap leaf 5 by adjusting the sliding clamp 71. The key to this step is to ensure the correct initial position of the flap leaf 5 so that the subsequent clamping operation can proceed smoothly. After the flap leaf 5 is initially in place, the operator must rotate the rotating clamp 62 in the opposite direction to cause the arc groove plate 63 to return to its original position. The return movement of the arc groove plate 63 pulls the sliding plate 64 toward its initial position via the sliding post 69. During this process, the arc-edge protrusion 610 re-enters the triangular groove 66 and slides along its oblique edge. Due to the oblique edge design of the triangular groove 66, the movement of the arc-edge protrusion 610 applies inward pressure to the inclined telescopic plate 65, causing it to overcome the spring force and retract along the slide groove 67 until it is fully restored. When the inclined telescopic plate 65 is fully retracted, the two sides of the flap leaf 5 are clamped by the first positioning clamp 68 and the second positioning clamp 74 respectively. At this time, the parallelism of the flap leaf 5 is consistent with that of the adjacent blades, and its axial direction is aligned with the side axis 61 and the central axis 73 to ensure the synchronization of the entire baffle door during operation. Finally, the operator needs to tighten the fixing bolts to firmly lock the rotating clamp 62 and the sliding clamp 71 to prevent loosening during operation. After the installation is completed, the rotation flexibility of the flap leaf 5 needs to be manually checked to ensure that there is no jamming. At the same time, a small-amplitude switch test can be performed through the electronic control system to observe whether the overall movement of the baffle door is smooth. If an abnormality is found, it is necessary to readjust the positioning clamp or check whether the mechanical linkage mechanism is installed in place. Through the above process, not only the maintenance efficiency of the baffle door is improved, but also the stability and reliability of the long-term operation of the equipment are ensured.

[0047] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A quick replacement device for a flue damper door at an economizer outlet, comprising a door frame (1), a partition (2) fixedly connected to the middle of the door frame (1), a drive motor (4) fixedly connected to both sides of the door frame (1) via a mounting frame, the drive motor (4) being connected to a single flap leaf (5) via a connecting member (3), the single flap leaf (5) being movably connected between the door frame (1) and the partition (2), characterized in that: Also includes: A quick-change mechanism (6), wherein the quick-change mechanism (6) is located on both sides of the door frame (1); an auxiliary latching mechanism (7), the auxiliary latching mechanism (7) being connected to the partition (2); The quick-change mechanism (6) comprises side shafts (61) rotatably connected to both sides of the door frame (1), and three pairs of side shafts (61) are symmetrically arranged.

2. The economizer outlet flue damper door quick replacement device according to claim 1, characterized in that: The quick-change mechanism (6) further comprises a first positioning clamping plate (68) and a rotating clamping plate (62), wherein the first positioning clamping plate (68) is fixedly connected to one side of the end of the side shaft (61), and the rotating clamping plate (62) is rotatably connected to the other side of the end of the side shaft (61).

3. The quick replacement device for the flue damper door at the economizer outlet according to claim 2 is characterized in that: The first positioning clamping plate (68), the rotating clamping plate (62) and the flap single leaf (5) are fixed together by bolts, and the end of the side shaft (61) is fixed to the connecting member (3).

4. The quick replacement device for the flue damper door at the economizer outlet according to claim 3 is characterized in that: A sliding groove (67) is provided in the middle of the side shaft (61), and an inclined telescopic plate (65) is slidably connected in the sliding groove (67), and the inclined telescopic plate (65) is elastically connected to the inner cavity of the side shaft (61).

5. The quick replacement device for the flue damper door at the economizer outlet according to claim 4 is characterized in that: Triangular grooves (66) are provided on both sides of the inclined telescopic plate (65), and the inclined telescopic plate (65) abuts against the single flap leaf (5) through the inclined end.

6. The economizer outlet flue damper door quick replacement device according to claim 5, characterized in that: An arc groove plate (63) is fixedly connected to the middle of the rotating clamping plate (62), and the arc groove plate (63) is slidably connected to a pair of sliding plates (64) through sliding columns (69), and the sliding plates (64) are slidably connected to the inner cavity of the side shaft (61).

7. The economizer outlet flue damper door quick replacement device according to claim 6, characterized in that: A pair of sliding plates (64) are fixedly connected to one side thereof close to each other with arc-edge protrusions (610), and the arc-edge protrusions (610) are slidably abutted in the triangular grooves (66).

8. The quick replacement device for the flue damper door at the economizer outlet according to claim 7, characterized in that: The auxiliary locking mechanism (7) comprises a central axis (73) rotatably connected to the middle of the partition (2); a groove (75) is formed on the central axis (73) and the side wall of the partition (2).

9. The economizer outlet flue damper door quick replacement device according to claim 8, characterized in that: A sliding clamp (71) is slidably connected in the groove (75), and the sliding clamp (71) is slidably connected to the central axis (73) through a guide column (72).

10. The quick replacement device for the flue damper door at the economizer outlet according to claim 9, characterized in that: A second positioning clamping plate (74) is fixedly connected to one side of the end of the central axis (73) away from the sliding clamping plate (71), and the sliding clamping plate (71), the second positioning clamping plate (74) and the flap single leaf (5) are fixedly connected together by bolts.

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