A manual safety turning gear for steam turbines

Abstract

The utility model discloses a kind of steam turbine manual safety turning gear device, it is related to steam turbine turning gear technical field, including trolley, the upper surface of trolley is provided with lifting platform, and the front end inner surface of lifting platform is provided with sliding guide rail, the outer surface of sliding guide rail is slidably installed with sliding support frame, and the bottom surface of sliding support frame is provided with support platform, the upper surface of support platform is rotatably installed with driving disc one.The steam turbine manual safety turning gear device, compared with the existing ordinary steam turbine manual safety turning gear device, through threaded drive rod, after trolley with lifting platform is used to approach steam turbine, through the screw transmission of threaded drive rod, the sliding height of sliding support rod is accurately controlled, so that driving hand disc can be accurately and quickly positioned with rotor, improve the connection speed of equipment;Through the setting of sliding guide rail, when driving hand disc and rotor are connected by chain, chain is tensioned by sliding mode.

Description

Technical Field

[0001] This utility model relates to the field of turbine turning gear technology, specifically a manual safety turning gear device for a turbine. Background Technology

[0002] After a turbine shutdown due to a malfunction or a normal shutdown, it is necessary to use an electric turning gear to ensure that the turbine rotors continue to rotate continuously or regularly, thus eliminating rotor thermal bending. When the turning gear loses power, manual turning is required to ensure continuous or regular rotor rotation and prevent rotor thermal bending, which could lead to rotor damage. The turbine turning gear installation location is often structurally complex, making manual operation inconvenient and prone to accidents. Furthermore, the turning gear is compact, and the handwheel provided by the manufacturer is small, making manual operation inconvenient and labor-intensive.

[0003] For example, patent application number 202420915915.4 discloses a manual safety turning device for a steam turbine. This utility model discloses a manual safety turning device for a steam turbine, including a movable base with a standing platform on the movable base. An auxiliary turning mechanism is provided on one side of the standing platform. The auxiliary turning mechanism includes a support frame with a first sprocket on the support frame. A rocker arm is provided on the first sprocket, and a chain is wound around the first sprocket. The chain winds around a second sprocket, which is located on the turning wheel. This utility model has a simple structure and novel design. It features a movable and liftable standing platform, allowing the operator to stand on the platform for better force application during turning. The auxiliary turning mechanism allows another operator to assist, enabling two people to work together to complete a long turning process, reducing the operator's burden and ensuring the turning effect. However, when connecting the steam turbine rotor, this manual safety turning device requires frequent control of the turning wheel to move and adjust its height to match the rotor height, which affects the connection speed of the manual turning wheel.

[0004] Therefore, in view of this, we studied and improved the existing structure to propose a manual safety turning device for steam turbines. Utility Model Content

[0005] The purpose of this invention is to provide a manual safety turning device for steam turbines to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a manual safety turning device for a steam turbine, comprising a trolley. A lifting platform is provided on the upper surface of the trolley, and a sliding guide rail is provided on the inner surface of the front end of the lifting platform. A sliding support frame is slidably mounted on the outer surface of the sliding guide rail, and a support platform is provided on the bottom surface of the sliding support frame. A drive disc is rotatably mounted on the upper surface of the support platform, and a threaded drive rod is provided on the upper surface of the drive disc. A sliding sleeve is provided on the upper surface of the sliding support frame, and a sliding support rod is slidably mounted on the inner surface of the sliding sleeve. The sliding support rod and the threaded drive rod are connected by a helical connection, and a drive handwheel is provided on the upper surface of the sliding support rod.

[0007] Preferably, a handwheel is rotatably mounted on the left side of the upper surface of the sliding support frame, and a drive disc is provided on the lower surface of the handwheel.

[0008] Preferably, the outer surface of the second drive disk is provided with a connecting belt, and the first drive disk and the second drive disk are connected by the connecting belt.

[0009] Preferably, a support block is provided on the right side surface of the sliding support frame, and a sliding rod is slidably installed through the surface of the support block.

[0010] Preferably, the upper surface of the sliding rod is provided with a pull ring, and the outer surface of the sliding rod is provided with a compression spring.

[0011] Preferably, a guide groove is provided on the right side of the sliding guide rail, and the guide groove and the sliding rod are configured to be slidably connected.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model, through the arrangement of a trolley, lifting platform, sliding guide rail, sliding support frame, support platform, drive disc one, threaded drive rod, sliding sleeve, sliding support rod, drive hand disc, connecting belt, drive disc two, and handwheel, allows for precise control of the sliding height of the sliding support rod via the screw drive rod after the trolley with the lifting platform approaches the turbine. This enables the drive hand disc to accurately and quickly position itself with the rotor, improving the connection speed of the equipment. Furthermore, the sliding guide rail allows for chain tightening via sliding when the drive hand disc and rotor are connected by a chain.

[0014] 2. This utility model, through the arrangement of guide grooves, support blocks, sliding rods, pull rings and compression springs, and through the sliding rods, can fix the sliding support frame by means of interlocking friction, thereby preventing the drive handwheel from shaking during operation and improving the working stability of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the sliding support rod of this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the threaded drive rod of this utility model;

[0018] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0019] In the diagram: 1. Trolley; 101. Lifting platform; 102. Sliding guide rail; 2. Sliding support frame; 201. Support platform; 202. Drive disc one; 203. Threaded drive rod; 204. Sliding sleeve; 205. Sliding support rod; 206. Drive handwheel; 207. Connecting belt; 208. Drive disc two; 209. Handwheel; 3. Guide groove; 301. Support block; 302. Sliding insert rod; 303. Pull ring; 304. Compression spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1-3 As shown, a manual safety turning device for a steam turbine includes a trolley 1. A lifting platform 101 is mounted on the upper surface of the trolley 1. A sliding guide rail 102 is mounted on the inner front surface of the lifting platform 101. A sliding support frame 2 is slidably mounted on the outer surface of the sliding guide rail 102. A support platform 201 is mounted on the bottom surface of the sliding support frame 2. A drive disc 202 is rotatably mounted on the upper surface of the support platform 201. A threaded drive rod 203 is mounted on the upper surface of the drive disc 202. A sliding sleeve 204 is mounted on the upper surface of the sliding support frame 2. A sliding support rod 205 is slidably installed on the inner surface of 04. In this technical solution, through the threaded drive rod 203, after the trolley 1 with the lifting platform 101 approaches the steam turbine, the sliding height of the sliding support rod 205 can be precisely controlled by the screw drive rod 203, so that the drive hand plate 206 can be accurately and quickly positioned with the rotor, improving the connection speed of the equipment. Through the setting of the sliding guide rail 102, when the drive hand plate 206 is connected to the rotor through the chain, the chain can be tightened by sliding.

[0022] Furthermore, the sliding support rod 205 and the threaded drive rod 203 are connected by a helical connection, and the upper surface of the sliding support rod 205 is provided with a drive hand plate 206. With this technical solution, the turbine rotor can be driven to rotate manually by setting the drive hand plate 206.

[0023] Furthermore, a handwheel 209 is rotatably mounted on the left side of the upper surface of the sliding support frame 2, and a second drive disc 208 is provided on the lower surface of the handwheel 209. A connecting belt 207 is provided on the outer surface of the second drive disc 208, and the first drive disc 202 and the second drive disc 208 are connected by the connecting belt 207. In this technical solution, the threaded drive rod 203 can be rotated by the connecting belt 207 through the setting of the handwheel 209.

[0024] like Figure 4 As shown, a support block 301 is provided on the right side surface of the sliding support frame 2, and a sliding rod 302 is slidably installed through the surface of the support block 301. With this technical solution, the sliding support frame 2 can be fixed by the insertion friction of the sliding rod 302, so as to avoid the drive hand plate 206 from shaking during operation and improve the working stability of the equipment.

[0025] Furthermore, a pull ring 303 is provided on the upper surface of the sliding rod 302, and a compression spring 304 is provided on the outer surface of the sliding rod 302. A guide groove 3 is provided on the right side of the sliding guide rail 102, and the guide groove 3 and the sliding rod 302 are configured to slide and engage. In this technical solution, the compression spring 304 can be used to fix the sliding rod 302 by means of its elastic reset characteristic.

[0026] Working principle: When using this turbine manual safety turning device, firstly, the lifting platform 101 is moved close to the turbine by the trolley 1. Then, according to the height of the drive handwheel 206 and the rotor, the handwheel 209 is rotated to drive the drive disc 208 to rotate. The connecting belt 207 on the outer surface of the drive disc 208 drives the drive disc 202 to rotate, causing the threaded drive rod 203 to rotate. Simultaneously, the sliding support rod 205 slides along the inner surface of the sliding sleeve 204 through a screw drive to adjust the drive handwheel 206. The height of the chain is adjusted to match the rotor height. After adjustment, the chain is connected to the outer surface of the drive handwheel 206. After connection, the sliding rod 302 is pulled upward to release the restriction on the sliding support frame 2. The chain is then tightened by sliding along the sliding guide rail 102. After tightening, the sliding rod 302 is released, and its compression spring 304 will reset to drive the sliding rod 302 to insert into the guide groove 3 to fix the sliding support frame 2. Finally, the drive handwheel 206 is manually rotated to rotate the rotor. This is the working principle of the manual safety turning device for the steam turbine.

Claims

1. A hand safety turning gear for a steam turbine comprising a trolley (1), characterized in that, The upper surface of the trolley (1) is provided with a lifting platform (101), and the inner surface of the front end of the lifting platform (101) is provided with a sliding guide rail (102). The outer surface of the sliding guide rail (102) is slidably mounted with a sliding support frame (2), and the bottom surface of the sliding support frame (2) is provided with a support platform (201). The upper surface of the support platform (201) is rotatably mounted with a drive disk (202), and the upper surface of the drive disk (202) is provided with a threaded drive rod (203). The upper surface of the sliding support frame (2) is provided with a sliding sleeve (204), and the inner surface of the sliding sleeve (204) is slidably mounted with a sliding support rod (205). The sliding support rod (205) and the threaded drive rod (203) are provided with a spiral connection, and the upper surface of the sliding support rod (205) is provided with a drive hand disc (206).

2. A manual safety turning gear for steam turbines according to claim 1, characterized in that, A handwheel (209) is rotatably mounted on the left side of the upper surface of the sliding support frame (2), and a drive disc (208) is provided on the lower surface of the handwheel (209).

3. A hand safety turning gear for steam turbines according to claim 2, characterized in that, The outer surface of the second drive disk (208) is provided with a connecting belt (207), and the first drive disk (202) and the second drive disk (208) are connected by the connecting belt (207).

4. A hand safety turning gear for steam turbines according to claim 1, characterized in that, The right side surface of the sliding support frame (2) is provided with a support block (301), and a sliding rod (302) is slidably installed through the surface of the support block (301).

5. A hand safety turning gear for steam turbines according to claim 4, characterized in that, The upper surface of the sliding rod (302) is provided with a pull ring (303), and the outer surface of the sliding rod (302) is provided with a compression spring (304).

6. A hand safety turning gear for steam turbines according to claim 1, characterized in that, The sliding guide rail (102) has a guide groove (3) on its right side, and the guide groove (3) and the sliding rod (302) are configured to slide and engage.

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