Boiler smoke damper transmission mechanism and boiler

Abstract

The invention discloses a boiler smoke damper transmission mechanism and a boiler, and relates to the technical field of exhaust gas devices; the boiler smoke damper transmission mechanism comprises a first connecting rod, a second connecting rod, a transmission unit, a transverse connecting rod and a linkage unit which are connected in sequence, the transmission unit comprises a transmission water drop plate and a transmission shaft which are connected to each other, the linkage unit comprises a linkage water drop plate and a linkage shaft which are connected to each other, and also comprises third to fifth connecting rods, the number of the transmission units is two, the transmission shaft comprises a first transmission shaft and a second transmission shaft, the transverse connecting rod comprises a first transverse connecting rod and a second transverse connecting rod, and the linkage unit comprises a first linkage unit and a second linkage unit; the boiler comprises a furnace body, a vertical shaft arranged in the furnace body and the above-mentioned smoke damper transmission mechanism arranged on the furnace body; it drives two staggered linkage units through two transmission units, etc., so that the boiler smoke damper transmission mechanism has a good working effect and is not easy to get stuck.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust gas exhaust devices, and in particular to a boiler smoke damper transmission mechanism and a boiler. Background Art

[0002] The search formula is TACD_ALL: (boiler AND flue gas AND baffle AND transmission mechanism), and the relatively close prior art solutions are as follows.

[0003] The application publication number is CN 113566219 A, and the name is a smoke damper door with a high sealing structure. Through the mutual cooperation between the storage groove with a sealing plate, a sliding rod, and a reset spring and the rotating shaft with a first limit block, a second limit block, and an eccentric pressure wheel, when the actuator drives the baffle to flip, under the elastic force of the limit spring, the rotating shaft and the baffle will not rotate relative to each other and rotate synchronously. When the baffle is close to the door frame, the rotation of the baffle driven by the rotating shaft is blocked, and the rotating shaft rotates relative to the baffle. At this time, the limit spring is compressed and contracted, and the eccentric pressure wheel rotates relative to the rotating groove. The eccentric pressure wheel presses the sliding rod extending from the sliding groove to the rotating groove, so that the adjacent sealing plate extends out of the storage groove to form a matching closed structure. Compared with the traditional smoke damper door, this technical solution can effectively prevent smoke from being discharged from the adjacent gaps of the baffle, has strong sealing performance, has market prospects, and is suitable for promotion.

[0004] The authorization announcement number is CN 216281466 U, and the name is a waste heat boiler chimney damper door structure. It includes a flue, a first baffle, a second baffle, a rotating shaft, a reducer and a motor. The rotating shaft is rotatably arranged in the middle of the flue, one end of the rotating shaft passes through the flue and is connected to the reducer, and the reducer is connected to the motor. The first baffle and the second baffle are respectively arranged on both sides of the rotating shaft. A torsion spring and a baffle are arranged above the first baffle, and an air outlet is opened on the first baffle. A torsion spring shaft is arranged at one end of the baffle to be rotatably connected to one side of the air outlet. The torsion spring is arranged on the torsion spring shaft, and the torsion spring abuts against the first baffle and the baffle respectively. The baffle covers the top of the air outlet under the elastic force of the torsion spring to close the air outlet. This technical solution is used to solve the problem that the existing main chimney damper door is stuck due to a malfunction and presents a safety hazard.

[0005] The authorization announcement number is CN 103982901 B, and the name is chimney damper door structure. A chimney damper door structure with low leakage, good drainage effect, and good stability when maintained in an open state, including door panels and a driving mechanism, two pairs of door panels, two door panels in the same pair of door panels open oppositely, the butt joints of the two door panels in the same pair of door panels are provided with a lower sealing seat, the butt joints of the door panels and the chimney, and the butt joints of the adjacent door panels between the two pairs of door panels are provided with upper sealing seats, and the upper surface of the lower sealing seat is provided with a drainage groove connected to the outside of the chimney; when the door panels are closed, one end of the door panels overlaps and is sealed to the upper surface of the lower sealing seat, and the other end overlaps and is sealed to the lower surface of the upper sealing seat, and the upper surface of the door panel is tilted in a manner that one end connected to the lower sealing seat is low and the other end is high. This technical solution solves the problems of high leakage rate, poor drainage effect, and difficulty in maintaining an open state of the chimney damper door.

[0006] Combining the above three patent documents and existing technical solutions, the inventors analyzed and found that the following technical problems exist in the existing technical solutions.

[0007] The flue gas damper of the boiler frequently jammed during operation, and the problem could not be solved after multiple repairs and replacements, which seriously affected the steam temperature regulation. All previous inspections found that the internal transmission assembly of the actuator was severely worn during use, and the planetary gears, worm gears and other components also had varying degrees of wear. Two groups of baffles (one group for superheater and one group for reheater) were arranged on the left and right sides of the boiler shaft flue, totaling four groups. Each group of baffles was equipped with an actuator. The span of the reheater baffle was 5m and 12 axes, and the span of the superheater was 6m and 14 axes. The flue gas damper was a rotork actuator with a torque of 10KN. After calculating the torque and torque of the actuator structure and checking with the manufacturer, it was found that the torque of the flue gas damper actuator was much lower than the damping torque of the baffle. Under the influence of dust accumulation on the flue gas side, the long-term overload of the actuator aggravated the wear of the actuator components, which was the most fundamental reason for the frequent jamming of the flue gas damper. The flue gas damper urgently needed to be upgraded.

[0008] Existing technical problems and considerations:

[0009] How to solve the technical problem of poor working performance of boiler flue gas damper transmission mechanism. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide a boiler flue gas damper transmission mechanism and a boiler, which solves the technical problem that the boiler flue gas damper transmission mechanism has a poor working effect.

[0011] To solve the above technical problems, the technical solution adopted by the present invention is: a boiler flue gas damper transmission mechanism includes a first connecting rod, a second connecting rod, a transmission unit, a transverse connecting rod and a linkage unit connected in sequence, the transmission unit includes a transmission water drop plate and a transmission shaft connected to each other, the linkage unit includes a linkage water drop plate and a linkage shaft connected to each other, and also includes third to fifth connecting rods, the number of transmission units is two, the transmission shaft includes a first transmission shaft and a second transmission shaft, the transverse connecting rod includes a first transverse connecting rod and a second transverse connecting rod, the linkage unit includes a first linkage unit and a second linkage unit, the first linkage unit and the second linkage unit are staggered, the first transverse connecting rod, the first linkage unit, the second linkage unit and the second transverse connecting rod are distributed in sequence, one end of the third connecting rod is fixedly connected to the first transmission shaft, the other end of the third connecting rod is rotatably connected to one end of the fourth connecting rod, the other end of the fourth connecting rod is rotatably connected to one end of the fifth connecting rod, and the other end of the fifth connecting rod is fixedly connected to the second transmission shaft.

[0012] A further technical solution is that: the first connecting rod and the second connecting rod are both connecting rods for connecting to a driving unit, the linkage unit is a linkage structure for driving the boiler smoke damper to rotate, the first connecting rod is rotatably connected to one end of the second connecting rod, the other end of the second connecting rod is fixedly connected to the first transmission shaft, one end of the transmission water drop plate is fixedly connected to the transmission shaft, the other end of the transmission water drop plate is rotatably connected to the transverse connecting rod, one end of the linkage water drop plate is fixedly connected to the linkage shaft, and the other end of the linkage water drop plate is rotatably connected to the transverse connecting rod.

[0013] A further technical solution is that the transmission unit, the transverse connecting rod and the linkage unit form a transmission device, the transmission device includes a first transmission device and a second transmission device, the first transmission device includes a first transmission unit, a first transverse connecting rod and a first linkage unit, the second transmission device includes a second transmission unit, a second transverse connecting rod and a second linkage unit, and the first to fifth connecting rods form a transmission mechanism.

[0014] A further technical solution is that the transmission mechanism comprises a first transmission mechanism and a second transmission mechanism, and each transmission mechanism is a linkage structure for independently driving the boiler smoke damper to rotate.

[0015] A boiler comprises a furnace body, a vertical shaft arranged in the furnace body and a smoke damper transmission mechanism arranged on the furnace body, wherein the smoke damper transmission mechanism is the above-mentioned smoke damper transmission mechanism.

[0016] A further technical solution is that the smoke damper transmission mechanism includes a first smoke damper transmission mechanism and a second smoke damper transmission mechanism, the first smoke damper transmission mechanism is located on one side of the shaft, and the second smoke damper transmission mechanism is located on the other side of the shaft.

[0017] A further technical solution is that the vertical shaft includes a first vertical shaft and a second vertical shaft, the smoke damper transmission mechanism includes first to fourth smoke damper transmission mechanisms, the first smoke damper transmission mechanism is located on one side of the first vertical shaft, the second smoke damper transmission mechanism is located on the other side of the first vertical shaft, the third smoke damper transmission mechanism is located on one side of the second vertical shaft, and the fourth smoke damper transmission mechanism is located on the other side of the second vertical shaft.

[0018] The beneficial effects of adopting the above technical solution are:

[0019] A boiler flue gas damper transmission mechanism comprises a first connecting rod, a second connecting rod, a transmission unit, a transverse connecting rod and a linkage unit connected in sequence, the transmission unit comprises a transmission water drop plate and a transmission shaft connected to each other, the linkage unit comprises a linkage water drop plate and a linkage shaft connected to each other, and further comprises third to fifth connecting rods, the number of the transmission units is two, the transmission shaft comprises a first transmission shaft and a second transmission shaft, the transverse connecting rod comprises a first transverse connecting rod and a second transverse connecting rod, the linkage unit comprises a first linkage unit and a second linkage unit, the first linkage unit and the second linkage unit are staggered, the first transverse connecting rod, the first linkage unit, the second linkage unit and the second transverse connecting rod are distributed in sequence, one end of the third connecting rod is fixedly connected to the first transmission shaft, the other end of the third connecting rod is rotatably connected to one end of the fourth connecting rod, the other end of the fourth connecting rod is rotatably connected to one end of the fifth connecting rod, and the other end of the fifth connecting rod is fixedly connected to the second transmission shaft. The technical solution realizes that the boiler flue gas damper transmission mechanism has a good working effect and is not easy to get stuck by driving two staggeredly distributed linkage units through two transmission units.

[0020] A boiler includes a furnace body, a vertical shaft arranged in the furnace body, and a flue gas damper transmission mechanism arranged on the furnace body, wherein the flue gas damper transmission mechanism is the above-mentioned flue gas damper transmission mechanism. This technical solution realizes that the flue gas damper transmission mechanism of the boiler has a good working effect and is not easy to get stuck by driving two staggered linkage units through two transmission units.

[0021] Please refer to the detailed description of the specific implementation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural diagram of Embodiment 1 of the present invention;

[0023] Figure 2 is a structural diagram of Embodiment 2 of the present invention;

[0024] Figure 3 is a distribution diagram of Example 3 of the present invention;

[0025] Figure 4 This is the distribution diagram of Example 4 of the present invention.

[0026] Among them: 1 first connecting rod, 2 second connecting rod, 3 third connecting rod, 4 fourth connecting rod, 5 fifth connecting rod, 6-1 first transverse connecting rod, 6-2 second transverse connecting rod, 7-1 first transmission water drop plate, 7-2 second transmission water drop plate, 8-1 first linkage water drop plate, 8-2 second linkage water drop plate, 9-1 first transmission mechanism, 9-2 second transmission mechanism, 10-1 first vertical shaft, 10-2 second vertical shaft. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0029] Embodiment 1:

[0030] like Figure 1 As shown, the present invention discloses a boiler smoke damper transmission mechanism including a first connecting rod 1, a second connecting rod 2, a third connecting rod 3, a fourth connecting rod 4, and a fifth connecting rod 5 connected in sequence, a transmission unit, a transverse connecting rod and a linkage unit, the transmission unit, the transverse connecting rod and the linkage unit form a transmission device, the transmission device includes a first transmission device and a second transmission device, the first transmission device includes a first transmission unit, a first transverse connecting rod 6-1 and a first linkage unit, the second transmission device includes a second transmission unit, a second transverse connecting rod 6-2 and a second linkage unit, the first transmission unit includes a first transmission water drop plate 7-1 and a first transmission shaft connected to each other, the second transmission unit includes a second transmission water drop plate 7-2 and a second transmission shaft connected to each other, the first linkage unit includes a first linkage water drop plate 8-1 and a first linkage shaft connected to each other, the second linkage unit includes a second linkage water drop plate 8-2 and a second linkage shaft connected to each other, the first transmission device and the second transmission device and the first to fifth connecting rods form a transmission mechanism.

[0031] The first linkage unit and the second linkage unit are distributed alternately, the first transverse connecting rod 6-1, the first linkage unit, the second linkage unit and the second transverse connecting rod 6-2 are distributed in sequence, one end of the third connecting rod 3 is fixedly connected to the first transmission shaft, the other end of the third connecting rod 3 is rotatably connected to one end of the fourth connecting rod 4, the other end of the fourth connecting rod 4 is rotatably connected to one end of the fifth connecting rod 5, and the other end of the fifth connecting rod 5 is fixedly connected to the second transmission shaft.

[0032] The first connecting rod 1 and the second connecting rod 2 are both connecting rods used to connect to the driving unit. The linkage unit is a linkage structure used to drive the boiler smoke damper to rotate. The first connecting rod 1 is rotatably connected to one end of the second connecting rod 2, and the other end of the second connecting rod 2 is fixedly connected to the first transmission shaft.

[0033] One end of the first transmission water drop plate 7-1 is fixedly connected to the first transmission shaft, and the other end of the first transmission water drop plate 7-1 is rotatably connected to the first transverse connecting rod 6-1. One end of the first linkage water drop plate 8-1 is fixedly connected to the first linkage shaft, and the other end of the first linkage water drop plate 8-1 is rotatably connected to the first transverse connecting rod 6-1.

[0034] One end of the second transmission water drop plate 7-2 is fixedly connected to the second transmission shaft, and the other end of the second transmission water drop plate 7-2 is rotatably connected to the second transverse connecting rod 6-2. One end of the second linkage water drop plate 8-2 is fixedly connected to the second linkage shaft, and the other end of the second linkage water drop plate 8-2 is rotatably connected to the second transverse connecting rod 6-2.

[0035] Instructions for use:

[0036] The second connecting rod 2, the third connecting rod 3 and the first transmission water drop plate 7-1 are welded at an angle of 30 degrees. The first connecting rod 1 drives the second connecting rod 2 to rotate by the electric actuator, and then drives the first transmission water drop plate 7-1 and the third connecting rod 3 to rotate, thereby driving the first transverse connecting rod 6-1 and the second transverse connecting rod 6-2 to move horizontally, and then drives the baffle blade shaft, i.e. the linkage shaft, to rotate through the linkage water drop plate, thereby realizing the baffle adjustment. Each blade shaft is on the same horizontal line.

[0037] Embodiment 2:

[0038] Embodiment 2 is different from Embodiment 1 in that the transmission device is divided into two parts, and each part of the transmission device is driven by a transmission mechanism.

[0039] like Figure 2 As shown, the present invention discloses a boiler smoke damper transmission mechanism including a first transmission mechanism 9-1 and a second transmission mechanism 9-2, each transmission mechanism being a linkage structure for independently driving the boiler smoke damper to rotate.

[0040] The first to fifth connecting rods form a transmission mechanism.

[0041] Embodiment 3:

[0042] The present invention discloses a boiler comprising a furnace body, a vertical shaft fixed in the furnace body and a smoke damper transmission mechanism installed on the furnace body. The smoke damper transmission mechanism is the smoke damper transmission mechanism in Example 1.

[0043] like Figure 3 As shown, the shaft includes a first shaft 10 - 1 and a second shaft 10 - 2 .

[0044] The smoke damper transmission mechanism includes first to fourth smoke damper transmission mechanisms.

[0045] like Figure 3 As shown, the first smoke damper driving mechanism is located on one side of the first shaft 10 - 1 .

[0046] The second smoke damper driving mechanism is located on the other side of the first shaft 10 - 1 .

[0047] like Figure 3 As shown, the third smoke damper driving mechanism is located on one side of the second shaft 10 - 2 .

[0048] The fourth smoke damper driving mechanism is located on the other side of the second shaft 10 - 2 .

[0049] like Figure 3 As shown, one actuator on one side of the superheater damper drives fourteen damper blades, and one actuator on the reheater damper drives twelve damper blades.

[0050] Embodiment 4:

[0051] The present invention discloses a boiler comprising a furnace body, a vertical shaft fixed in the furnace body and a smoke damper transmission mechanism installed on the furnace body. The smoke damper transmission mechanism is the smoke damper transmission mechanism in Example 2.

[0052] like Figure 4 As shown, the shaft includes a first shaft 10 - 1 and a second shaft 10 - 2 .

[0053] The smoke damper transmission mechanism includes first to fourth smoke damper transmission mechanisms.

[0054] like Figure 4 As shown, the first smoke damper driving mechanism is located on one side of the first shaft 10 - 1 .

[0055] The second smoke damper driving mechanism is located on the other side of the first shaft 10 - 1 .

[0056] The upper and lower connecting rods between the seventh and eighth blade shafts of the superheater baffle are cut off, and water drop plates, actuators and driving shafts are installed at the eleventh and twelfth blade shafts. The number of actuators on each side of the superheater is increased from one to one at the front and one at the rear, thus solving the problem of jamming and inability to move caused by insufficient output of the actuator.

[0057] like Figure 4 As shown, the third smoke damper driving mechanism is located on one side of the second shaft 10 - 2 .

[0058] The fourth smoke damper driving mechanism is located on the other side of the second shaft 10 - 2 .

[0059] like Figure 4 As shown, one actuator on one side of the superheater damper drives fourteen damper blades, and one actuator on the reheater damper drives twelve damper blades.

[0060] The upper and lower connecting rods between the sixth and seventh blade shafts on the south side of the reheater baffle are cut off, and water drop plates, actuators and driving shafts are installed at the eleventh and twelfth blade shafts. The number of actuators on one side of the reheater is increased from one to one at the front and one at the rear, thus solving the problem of jamming and inability to move caused by insufficient output of the actuator.

[0061] The concept of this application:

[0062] 1) The technical solution of this application involves the optimization of the boiler baffle mechanism, which is intended to solve the problem of frequent jamming of the boiler baffle during operation.

[0063] Specific principle: Renovate and upgrade the boiler flue gas damper.

[0064] Furthermore, after the modification, the connecting rods were removed and the four groups of flue gas dampers were upgraded to eight groups (four groups for superheaters and four groups for reheaters). The newly added dampers were partially modified and equipped with separate actuators to reduce the span of the flue gas dampers and increase the torque. The control part maintained the original design, and the frequent jamming of the flue gas dampers will be completely eliminated after the modification.

[0065] 2) Technical difficulties:

[0066] The actuator torque of the flue gas damper of the boiler is much lower than the damping torque of the damper. Under the influence of dust accumulation on the flue gas side, the long-term overload of the actuator aggravates the wear of the actuator components, which leads to frequent jamming of the flue gas damper.

[0067] 3)Technological innovations:

[0068] After the modification of the baffles, the connecting rods were removed and the four groups of flue gas dampers were upgraded to eight groups (four groups for superheaters and four groups for reheaters). The newly added baffles were equipped with separate actuators through local modification to reduce the span of the flue gas dampers, increase the torque, and completely eliminate the hidden danger of frequent jamming of the flue gas dampers.

[0069] Technical solution description:

[0070] The boiler flue gas dampers were upgraded. The connecting rods were removed from the existing dampers, and four groups of flue gas dampers were upgraded to eight groups (four groups for superheaters and four groups for reheaters). The newly added dampers were partially modified and equipped with separate actuators to reduce the span of the flue gas dampers and increase the torque. The control part maintained the original design, and the frequent jamming of the flue gas dampers was completely eliminated after the modification.

[0071] After this application was run confidentially for a period of time, the on-site technicians reported that the benefits were:

[0072] It is mainly used to solve the problem of frequent jamming of boiler flue gas dampers during operation, and to avoid boiler steam temperature failure caused by damper problems.

[0073] At present, the technical solution of the present invention has been put into pilot production, that is, a small-scale test of the product before large-scale mass production; after the pilot production was completed, a user usage survey was carried out in a small range, and the survey results showed that user satisfaction was high; now preparations have begun for the formal production of the product for industrialization (including intellectual property risk warning survey).

Claims

1. A boiler flue gas damper transmission mechanism, comprising a first connecting rod, a second connecting rod, a transmission unit, a transverse connecting rod and a linkage unit connected in sequence, the transmission unit comprising a transmission water drop plate and a transmission shaft connected to each other, the linkage unit comprising a linkage water drop plate and a linkage shaft connected to each other, Features: It also includes third to fifth connecting rods, the number of transmission units is two, the transmission shaft includes a first transmission shaft and a second transmission shaft, the transverse connecting rod includes a first transverse connecting rod and a second transverse connecting rod, the linkage unit includes a first linkage unit and a second linkage unit, the first linkage unit and the second linkage unit are staggered, the first transverse connecting rod, the first linkage unit, the second linkage unit and the second transverse connecting rod are distributed in sequence, one end of the third connecting rod is fixedly connected to the first transmission shaft, the other end of the third connecting rod is rotatably connected to one end of the fourth connecting rod, the other end of the fourth connecting rod is rotatably connected to one end of the fifth connecting rod, and the other end of the fifth connecting rod is fixedly connected to the second transmission shaft; the first connecting rod and the second connecting rod are both connecting rods for connecting to the driving unit, and the linkage unit is a linkage structure for driving the boiler flue gas damper to rotate, the first connecting rod is rotatably connected to one end of the second connecting rod, the other end of the second connecting rod is fixedly connected to the first transmission shaft, one end of the transmission water drop plate is fixedly connected to the transmission shaft, the other end of the transmission water drop plate is rotatably connected to the transverse connecting rod, one end of the linkage water drop plate is fixedly connected to the linkage shaft, and the other end of the linkage water drop plate is rotatably connected to the transverse connecting rod.

2. The boiler flue gas damper transmission mechanism according to claim 1, Features: The transmission unit, the transverse connecting rod and the linkage unit form a transmission device, which includes a first transmission device and a second transmission device. The first transmission device includes a first transmission unit, a first transverse connecting rod and a first linkage unit. The second transmission device includes a second transmission unit, a second transverse connecting rod and a second linkage unit. The first to fifth connecting rods form a transmission mechanism.

3. The boiler flue gas damper transmission mechanism according to claim 2, Features: The transmission mechanism comprises a first transmission mechanism and a second transmission mechanism, and each transmission mechanism is a linkage structure for independently driving the boiler smoke damper to rotate.

4. A boiler comprising a furnace body, a vertical shaft arranged in the furnace body, and a flue gas damper transmission mechanism arranged on the furnace body, Features: The flue gas damper transmission mechanism is the boiler flue gas damper transmission mechanism according to claim 1.

5. The boiler according to claim 4, Features: The smoke damper transmission mechanism comprises a first smoke damper transmission mechanism and a second smoke damper transmission mechanism, wherein the first smoke damper transmission mechanism is located on one side of the shaft, and the second smoke damper transmission mechanism is located on the other side of the shaft.

6. The boiler according to claim 4, Features: The vertical shaft includes a first vertical shaft and a second vertical shaft, and the smoke damper transmission mechanism includes first to fourth smoke damper transmission mechanisms, the first smoke damper transmission mechanism is located on one side of the first vertical shaft, the second smoke damper transmission mechanism is located on the other side of the first vertical shaft, the third smoke damper transmission mechanism is located on one side of the second vertical shaft, and the fourth smoke damper transmission mechanism is located on the other side of the second vertical shaft.

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