Turning gear of air preheater

Abstract

The utility model discloses an air preheater turning gear which comprises a hand wheel, a shaft sleeve, a plurality of connecting rods, a bottom plate, a supporting shaft, a first ratchet and a spring, the shaft sleeve is used for being fixedly arranged on the tail portion of a driving shaft of an air preheater driving motor in a sleeved mode and located at the center position of the hand wheel, and the connecting rods are arranged on the bottom plate. The multiple connecting rods are connected with the shaft sleeve and the hand wheel respectively, multiple second ratchets are arranged on the periphery of the hand wheel and are sequentially arranged at intervals along the periphery of the hand wheel, the supporting shaft is located on the bottom plate, a mounting groove is formed in the side wall of the supporting shaft, and the supporting shaft is located in the mounting groove. The first ratchet is arranged in the mounting groove in a floatable mode, the first ratchet is meshed with the second ratchet, and the first ratchet and the second ratchet are opposite in direction. The technical scheme is used for solving the problems that a temporary turning structure of an existing air preheater has potential safety hazards and is insufficient in adaptability.

Description

Technical Field

[0001] This utility model belongs to the technical field of turning equipment, specifically relating to an air preheater turning device. Background Technology

[0002] An air preheater turning gear is a specialized device used during air preheater maintenance or unplanned shutdowns to slowly rotate the air preheater at a certain speed. Currently, commonly used air preheater turning gears require manual operation using a special "Z"-shaped tool mounted at the tail of the air preheater's drive motor. This type of device has several drawbacks:

[0003] (1) Poor operational safety: Only one operator can drive it. During the driving process, once the operator is exhausted, the operator will be subjected to a large reaction force due to the weight of the air preheater itself, its complex structure, and the multi-stage speed change of the drive mechanism. This can easily lead to mechanical injury and object strike accidents, seriously threatening the personal safety of the operator.

[0004] (2) Single driving method: It relies solely on human power and lacks compatibility with modern power tools, failing to meet the needs of different work scenarios and efficiency requirements. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides an air preheater turning device to solve the safety hazards and insufficient adaptability of the existing temporary turning structure of air preheaters. This utility model patent designs an air preheater turning device that can effectively avoid safety hazards caused by reaction forces, and can also be used to adapt to electric drive mechanisms.

[0006] This utility model discloses an air preheater turning device, including a handwheel, a bushing, connecting rods, a base plate, a support shaft, a first ratchet, and a spring. The bushing is used to fit and fix the air preheater drive motor drive shaft tail end, and the bushing is located at the center of the handwheel. There are multiple connecting rods, which are respectively connected to the bushing and the handwheel. Multiple second ratchets are provided on the outer periphery of the handwheel, and the multiple second ratchets are arranged sequentially and spaced apart along the outer periphery of the handwheel. The support shaft is located on the base plate, and the side wall of the support shaft has a mounting groove. The first ratchet is buoyantly disposed in the mounting groove, and the first ratchet is partially exposed in the mounting groove. The spring is located in the mounting groove, and the spring abuts against the bottom of the mounting groove and the first ratchet. The first ratchet and the second ratchet mesh, and the first ratchet and the second ratchet face opposite directions.

[0007] Furthermore, a crank handle is rotatably provided on the handwheel.

[0008] Furthermore, the bushing has a mounting hole in the middle, and a fixing keyway is provided on the side wall of the mounting hole.

[0009] This air preheater turning device has a first ratchet on the support shaft and multiple second ratchets on the outer circumference of the handwheel. The first and second ratchets mesh in opposite directions. During manual turning, the first ratchet will float, thus avoiding any impact on the turning. When a reverse force is applied, the reverse meshing of the first and second ratchets can effectively prevent the handwheel from reversing, thereby avoiding safety hazards. At the same time, the second ratchets on the outer circumference of the handwheel can be adapted to drive mechanisms such as motors, thereby realizing the switching between manual and automatic drive. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of an air preheater turning device. Detailed Implementation

[0012] This utility model discloses an air preheater turning device, which can effectively avoid safety hazards caused by reaction force, and can also be used to adapt to electric drive mechanisms.

[0013] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0014] See Figure 1As shown, this utility model discloses an air preheater turning device, including a handwheel 2, a bushing 5, connecting rods 6, a base plate 12, a support shaft 10, first ratchet teeth 7, and a spring 8. The bushing 5 is used to fit and fix to the tail of the drive shaft of the air preheater drive motor. The bushing 5 is located at the center of the handwheel 2. There are multiple connecting rods 6, which are respectively connected to the bushing 5 and the handwheel 2. Multiple second ratchet teeth 1 are provided on the outer periphery of the handwheel 2. The multiple second ratchet teeth 1 are arranged along the handwheel. The outer periphery of the 2 is arranged in sequence at intervals. The support shaft 10 is located on the base plate 12. The side wall of the support shaft 10 is provided with a mounting groove 9. The first ratchet 7 is floatingly disposed in the mounting groove 9, and part of the first ratchet 7 is exposed in the mounting groove 9. The spring 8 is located in the mounting groove 9, and the spring 8 abuts against the bottom of the mounting groove 9 and the first ratchet 7 respectively. The first ratchet 7 and the second ratchet 1 are engaged, and the first ratchet 7 and the second ratchet 1 face opposite directions.

[0015] The handwheel 2 is equipped with a crank handle 11.

[0016] The bushing 5 has a mounting hole 4 in the middle, and a fixing keyway 3 is provided on the side wall of the mounting hole 4.

[0017] This air preheater turning device has a first ratchet 7 on the support shaft 10 and multiple second ratchets 1 on the outer periphery of the handwheel 2. The first ratchet 7 and the second ratchet 1 mesh in opposite directions. During manual turning, the first ratchet 7 will float, thus avoiding any impact on the turning. When a reverse force occurs, the reverse meshing of the first ratchet 7 and the second ratchet 1 can effectively prevent the handwheel 2 from reversing, thereby avoiding safety hazards. At the same time, the second ratchet 1 on the outer periphery of the handwheel 2 can be adapted to drive mechanisms such as motors, thereby realizing the switching between manual and automatic drive.

[0018] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.

Claims

1. An air preheater turning gear characterized by, The device includes a handwheel, a bushing, connecting rods, a base plate, a support shaft, a first ratchet, and a spring. The bushing is used to fit and fix the drive shaft of the air preheater drive motor at the tail end. The bushing is located at the center of the handwheel. There are multiple connecting rods, which connect the bushing and the handwheel respectively. Multiple second ratchets are provided on the outer periphery of the handwheel, and the multiple second ratchets are arranged sequentially and spaced apart along the outer periphery of the handwheel. The support shaft is located on the base plate, and the side wall of the support shaft has a mounting groove. The first ratchet is floatingly disposed in the mounting groove, and a portion of the first ratchet is exposed in the mounting groove. The spring is located in the mounting groove, and the spring abuts against the bottom of the mounting groove and the first ratchet respectively. The first ratchet and the second ratchet mesh, and the first ratchet and the second ratchet face opposite directions.

2. An air preheater turning gear as claimed in claim 1, wherein, The handwheel is equipped with a crank handle for rotation.

3. An air preheater turning gear as claimed in claim 1, wherein, The bushing has a mounting hole in the middle, and a fixing keyway is provided on the side wall of the mounting hole.

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