Manual safety turning gear of steam turbine

Abstract

The utility model discloses a steam turbine manual safety turning gear which comprises a movable base, a standing platform is arranged on the movable base, an auxiliary turning mechanism is arranged on one side of the standing platform, the auxiliary turning mechanism comprises a supporting frame, a first chain wheel is arranged on the supporting frame, a rocker is arranged on the first chain wheel, and a second chain wheel is arranged on the rocker. A chain is wound on the first chain wheel, the chain is wound to a second chain wheel, and the second chain wheel is arranged on the barring wheel; the jigger is simple in structure and novel in design, the movable and liftable standing platform is arranged, an operator can stand on the standing platform, the jigger can better exert force during jigger, meanwhile, the auxiliary jigger mechanism is arranged, the other operator can assist in operation, the two operators are matched to complete the long-time jigger process, the jigger burden of the operator is relieved, and the jigger effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine turning, in particular to a manual safety turning device for a steam turbine. Background Art

[0002] The electric turning device is required to turn the turbine after a fault shutdown or normal shutdown to ensure that the turbine rotor can rotate continuously or regularly to eliminate the thermal bending of the rotor. When the turning device loses power, manual turning is required to ensure that the rotor can rotate continuously or regularly to prevent the rotor from thermal bending and causing rotor damage accidents. The installation site of the turbine turning device is complex and inconvenient for manual operation, which is prone to safety accidents. At the same time, the turning device is compact, and the turning handwheel provided by the manufacturer is small, which is inconvenient to operate manually and has high labor intensity. Summary of the invention

[0003] The purpose of the utility model is to provide a manual safety turning device for a steam turbine to solve the problems raised in the above background technology. To achieve the above purpose, the utility model provides the following technical solutions: a manual safety turning device for a steam turbine, comprising a movable base, a standing platform is provided on the movable base, an auxiliary turning mechanism is provided on one side of the standing platform, the auxiliary turning mechanism comprises a support frame, a first sprocket is provided on the support frame, a rocker is provided on the first sprocket, a chain is wound around the first sprocket, the chain is wound to a second sprocket, and the second sprocket is provided on a turning wheel.

[0004] Preferably, a lifting mechanism is provided at the bottom of the standing platform, and the lifting mechanism includes multiple groups of scissor-type lifting arms, each group of the scissor-type lifting arms is provided with a hydraulic cylinder, and two groups of crossed support arms. A connecting rod is provided at the connection of the scissor-type lifting arms, and the connecting rod connects the support arms at both ends.

[0005] Preferably, the first sprocket and the second sprocket are both provided with a rocker.

[0006] Preferably, guardrails are provided around the standing platform, and a control console is also provided on the standing platform.

[0007] Preferably, a plurality of universal wheels are provided at the bottom of the movable base.

[0008] Compared with the prior art, the beneficial effects of the utility model are: the utility model has a novel design, utilizes a reasonable mechanical structure, cleverly brings into play the inherent potential of various elements, and provides a movable and liftable standing platform. The operator can stand on the standing platform to make better use of the turning effect. At the same time, an auxiliary turning mechanism is provided, which can be assisted by another operator. The two people cooperate to complete the long turning process, reducing the turning burden of the operator and ensuring the turning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the lifting mechanism structure in the utility model;

[0011] Figure 3 It is a schematic diagram of the connection between the first sprocket and the second sprocket in the utility model. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] See also Figure 1-3 The utility model provides a technical solution: a manual safety turning device for a steam turbine, comprising a movable base 1, a standing platform 2 is provided on the movable base 1, the standing platform 2 can be used for two operators to stand, an auxiliary turning mechanism 3 is provided on one side of the standing platform 2, the auxiliary turning mechanism 3 comprises a support frame 31, a first sprocket 32 ​​is provided on the support frame 31, a chain 41 is wound around the first sprocket 32, the chain 41 is wound around the second sprocket 42, the second sprocket 42 is arranged on the turning wheel, the first sprocket 32 ​​and the second sprocket 42 are both provided with a rocker 43, the rocker 43 can facilitate the operator to apply force when rotating the sprocket.

[0014] One operator rotates the second sprocket 42, which can directly drive the disc wheel to rotate. Another operator rotates the first sprocket 32, which transmits force through the chain 41 to assist the second sprocket 42 to rotate, thereby driving the disc wheel to rotate. Two operators cooperate to complete a long period of disc turning, which can reduce the operators' disc turning burden and ensure the disc turning effect.

[0015] A lifting mechanism 5 is provided at the bottom of the standing platform 2, and the lifting mechanism 5 includes multiple groups of scissor-type lifting arms 51. A hydraulic cylinder 52 is provided under each group of the scissor-type lifting arms 51. The scissor-type lifting arms 51 include two groups of intersecting support arms 53. Each intersecting support arm 53 is hinged. A connecting rod 54 is provided at the connection of the scissor-type lifting arms 51. The connecting rod 54 connects the support arms 53 at both ends. The connecting rod 54 is used to ensure the overall stability. The hydraulic cylinder 52 is fixed between the two connecting rods 54 in the oblique direction to push the entire lifting mechanism 5 to rise and fall, so as to adjust the height of the standing platform 2 according to the height of the operator.

[0016] The standing platform 2 is surrounded by guardrails 21, and the guardrails 21 are used to provide safety protection for the operator to prevent the operator from falling from the standing platform.

[0017] The standing platform 2 is also provided with a control console, through which an operator can adjust the height of the lifting mechanism 5.

[0018] The bottom of the movable base 1 is provided with a plurality of universal wheels 11 , and the entire device can be moved by the universal wheels 11 .

[0019] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A manual safety turning device for a steam turbine, comprising a movable base (1), characterized in that: The movable base (1) is provided with a standing platform (2), one side of the standing platform (2) is provided with an auxiliary turning mechanism (3), the auxiliary turning mechanism (3) comprises a support frame (31), a first sprocket (32) is provided on the support frame (31), a chain (41) is wound around the first sprocket (32), the chain (41) is wound around a second sprocket (42), and the second sprocket (42) is provided on a turning wheel.

2. A manual safety turning device for a steam turbine according to claim 1, characterized in that: A lifting mechanism (5) is provided at the bottom of the standing platform (2), the lifting mechanism (5) comprising a plurality of groups of scissor lift arms (51), each group of the scissor lift arms (51) being provided with a hydraulic cylinder (52), the scissor lift arms (51) comprising two groups of intersecting support arms (53), a connecting rod (54) being provided at the connection of the scissor lift arms (51), the connecting rod (54) connecting the support arms (53) at both ends.

3. A manual safety turning device for a steam turbine according to claim 1, characterized in that: The first sprocket (32) and the second sprocket (42) are both provided with a rocker (43).

4. A manual safety turning device for a steam turbine according to claim 1, characterized in that: The standing platform (2) is provided with guardrails (21) around its periphery, and a control console is also provided on the standing platform (2).

5. A manual safety turning device for a steam turbine according to claim 1, characterized in that: The bottom of the movable base (1) is provided with a plurality of universal wheels (11).

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