Manual face scraping tool for steam turbine cylinder

Abstract

The utility model discloses a manual surface scraping tool for a steam turbine cylinder, which comprises an expansion ring component, a surface scraping component, a surface scraping component and a surface scraping component, and is characterized in that the expansion ring component is positioned in a bolt through hole of a cylinder body; the expansion rod is located in the through hole of the expansion ring assembly, a through mounting hole is formed in the middle, and threads are arranged at one end; the locking nut is positioned on the thread at one end of the expansion rod; the cutter bar is arranged in the mounting hole, one end of the cutter bar is provided with a face scraping cutter, the other end of the cutter bar is provided with a feed nut in a threaded fit mode, a scraped face can be subjected to supplementary machining on the basis of an original bolt through hole, and the transportation cost, the waiting time and the machine-to-machine cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to a manual scraping tool for a steam turbine cylinder. Background Art

[0002] The center plane of the steam turbine cylinder is processed by a gantry milling machine, the bolt holes of the steam turbine are processed by a gantry milling machine, a boring machine, and a drilling machine, and the scraped surface of the bolt hole is usually processed by a drilling machine. The drilling accuracy can usually be guaranteed by a drilling machine, but the reverse scraping of the drilling machine is prone to positive eight-shaped and reverse eight-shaped scraped surface errors.

[0003] In the prior art, if a machined unit is found to have processing errors in the assembly workshop, it is usually returned to the processing workshop for reprocessing, which requires additional transportation costs, waiting time and machine tool unit fees, and often the delivery cycle is affected due to the long waiting time. Therefore, there is an urgent need for a tool that can perform re-scratching of the turbine cylinder on site. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a manual scraping tool for a steam turbine cylinder, which can perform supplementary processing on the scraped surface based on the original bolt through hole, thereby saving transportation costs, waiting time and shift fees.

[0005] The utility model adopts the following technical solutions:

[0006] A manual scraping tool for a turbine cylinder comprises: an expansion ring assembly, which is located in a bolt through hole of a cylinder body and has a through hole in the middle; an expansion rod, which is located in the through hole of the expansion ring assembly and has a through mounting hole in the middle and has a thread at one end; a locking nut, which is located on the thread at one end of the expansion rod; and a knife rod, which is arranged in the mounting hole and has a scraping knife at one end and a threaded feed nut at the other end.

[0007] Preferably, the expansion ring assembly comprises an expansion ring fixing sleeve and an expansion ring connected to the expansion ring fixing sleeve via a pin.

[0008] Preferably, a radial bearing and a retaining spring pressed on the radial bearing are provided at one end of the expansion rod.

[0009] Preferably, the locking nut is pressed onto the expansion ring assembly.

[0010] Preferably, an adjusting washer is provided between the expansion ring assembly and the cylinder body.

[0011] Preferably, the scraping knife is mounted on the knife rod by a set screw.

[0012] Preferably, a thrust bearing is further provided between the feed nut and the cutter rod.

[0013] Compared with the prior art, the utility model has the following advantages: the utility model discloses a manual scraping tool for a turbine cylinder, comprising an expansion ring assembly, an expansion rod, a locking nut and a cutter rod. The cutter rod is arranged in a mounting hole, one end of which is provided with a scraping knife, and the other end is provided with a threaded feed nut. The scraping knife is pressed against the surface to be scraped, and the scraping knife is used to perform supplementary processing on the scraped surface by rotating the position of the external hexagonal wrench at the bottom of the cutter rod. The scraped surface is supplemented based on the original bolt through hole, which can save transportation costs, waiting time and shift fees. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional view of a manual scraping tool for a steam turbine cylinder.

[0015] In the figure, cylinder body 1, bolt through hole 1-1, expansion ring assembly 2, expansion ring fixing sleeve 2-1, expansion ring 2-2, pin 2-3, expansion rod 3, mounting hole 3-1, thread 3-2, radial bearing 3-3, retaining ring 3-4, locking nut 4, knife rod 5, scraping knife 5-1, feed nut 5-2, set screw 5-3, thrust bearing 5-4, adjusting washer 6. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the technical solution of the utility model, a detailed description is given below in conjunction with the accompanying drawings and specific embodiments.

[0017] Example 1

[0018] like Figure 1 As shown, a manual scraping tool for a steam turbine cylinder comprises:

[0019] The expansion ring assembly 2 is installed in the bolt through hole 1-1 of the cylinder body 1, and the middle part is a through hole;

[0020] The expansion rod 3 is located in the through hole of the expansion ring assembly 2, the middle part of which is a through mounting hole 3-1, and the upper end in the direction shown in the figure has a thread 3-2;

[0021] The locking nut 4 is located on the thread 3-2 at one end of the expansion rod 3;

[0022] The knife bar 5 is arranged in the mounting hole 3-1, with a scraping knife 5-1 at one end and a threaded feed nut 5-2 at the other end;

[0023] When in use, the scraping knife 5-1 is placed against the surface that needs to be scraped. The scraped surface is reprocessed by rotating the scraping knife 5-1. The scraped surface is reprocessed based on the original bolt through hole, which can save transportation costs, waiting time and shift fees.

[0024] The expansion ring assembly 2 includes an expansion ring fixing sleeve 2-1 and an expansion ring 2-2 connected to the expansion ring fixing sleeve 2-1 through a pin 2-3. Under the tight pressure of the locking nut 4, the expansion ring 2-2 will be expanded by the expansion rod 3, generating expansion stress and friction force to bear the reaction force of the scraper when working and ensure positioning accuracy.

[0025] One end of the expansion rod 3 is provided with a radial bearing 3-3 and a retaining spring 3-4 pressed on the radial bearing 3-3.

[0026] An adjusting washer 6 is provided between the expansion ring assembly 2 and the cylinder body 1 .

[0027] The scraping knife 5 - 1 is mounted on the knife bar 5 by means of a set screw 5 - 3 to prevent the scraping knife 5 - 1 and the knife bar 5 from deflecting.

[0028] A thrust bearing 5 - 4 is also provided between the feed nut 5 - 2 and the cutter rod 5 , so that the feed nut 5 - 2 can press the scraping knife 5 - 1 onto the surface of the cylinder body 1 .

[0029] The utility model adopts the structure of expansion ring 2-2 and expansion rod 3 for center positioning. When the expansion rod 3 is displaced under the action of locking nut 4, the expansion ring 2-2 is expanded by the expansion rod 3, generating expansion stress and friction force to bear the reaction force of the scraper when working, and ensure positioning accuracy. The tool rod 5 is installed at the center of the expansion rod 3. The expansion rod 3 and the tool rod 5 are positioned by radial bearing 3-3 and thrust bearing 5-4 to ensure accuracy and rotational motion. The scraper 5-1 is installed at the root of the tool rod 5. The scraper 5-1 is locked with a set screw 5-3; the feed nut 5-2 is installed at the head of the tool rod 5 to realize the feed function of the scraper processing.

[0030] When in use, first use the pin 2-3 to install the expansion ring fixing sleeve 2-1 and the expansion ring 2-2 to make them a whole. Install the radial bearing 3-3 at the tail of the expansion rod 3 and fix it axially with the retaining ring 3-4. Insert the expansion rod 3 into the expansion ring assembly 2, and gently screw on the locking nut 4 to make the expansion rod 3 and the expansion ring assembly 2 a whole. Install the whole formed by the expansion rod 3 and the expansion ring assembly 2 into the scraping hole (i.e., the bolt through hole 1-1), tighten the locking nut 4 to expand the expansion ring 2-2 and the bolt through hole 1-1, and use the adjusting washer 6 to adjust when the cylinder wall thickness is different. Install the scraping knife 5-1 on the knife rod 5 and lock it with the set screw 5-3, then insert the knife rod 5 into the mounting hole 3-1 of the expansion rod 3, install the thrust bearing 5-4 and the feed nut 5-2 on the top of the knife rod, rotate the feed nut 4 to achieve the feed, so that the scraping knife 5-1 is close to the surface to be scraped, and use a wrench to rotate the hexagonal structure at the tail of the knife rod 5 to achieve cutting.

[0031] The above are only preferred embodiments of the present invention. The protection scope of the present invention shall be based on the scope defined by the claims. Several improvements and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall also be regarded as the protection scope of the present invention.

Claims

1. A manual scraping tool for a steam turbine cylinder, characterized in that: include: The expansion ring assembly (2) is located in the bolt through hole (1-1) of the cylinder body (1), and the middle part is a through hole; The expansion rod (3) is located in the through hole of the expansion ring assembly (2), has a through mounting hole (3-1) in the middle, and has a thread (3-2) at one end; A locking nut (4) is located on the thread (3-2) at one end of the expansion rod (3); The knife rod (5) is arranged in the mounting hole (3-1), has a scraping knife (5-1) at one end, and is provided with a thread and matched with a feed nut (5-2) at the other end.

2. A manual scraping tool for a steam turbine cylinder according to claim 1, characterized in that: The expansion ring assembly (2) comprises an expansion ring fixing sleeve (2-1) and an expansion ring (2-2) connected to the expansion ring fixing sleeve (2-1) via a pin (2-3).

3. A manual scraping tool for a steam turbine cylinder according to claim 1, characterized in that: One end of the expansion rod (3) is provided with a radial bearing (3-3) and a retaining spring (3-4) pressed on the radial bearing (3-3).

4. A manual scraping tool for a steam turbine cylinder according to claim 1, characterized in that: The locking nut (4) is pressed onto the expansion ring assembly (2).

5. A manual scraping tool for a steam turbine cylinder according to claim 1, characterized in that: An adjusting washer (6) is provided between the expansion ring assembly (2) and the cylinder body (1).

6. A manual scraping tool for a steam turbine cylinder according to claim 1, characterized in that: The scraping knife (5-1) is mounted on the knife rod (5) via a set screw (5-3).

7. A manual scraping tool for a steam turbine cylinder according to claim 1, characterized in that: A thrust bearing (5-4) is also provided between the feed nut (5-2) and the cutter rod (5).

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