Auxiliary device for machining conical surface of high-pressure valve shell of steam turbine

Abstract

The utility model discloses a steam turbine high-pressure valve shell conical surface machining auxiliary device which comprises a stand column, a connecting plate, a hydraulic cylinder, a lower pressing plate, a fixing plate, a water tank, a water inlet pipe, a water outlet pipe and a fixing groove. The connecting plate extends to the position above the turbine high-pressure valve conical surface machining, a hydraulic cylinder installed through screws is arranged below the connecting plate, a piston rod of the hydraulic cylinder is sleeved with a lower pressing plate, the piston rod of the hydraulic cylinder is connected with a fixing plate, the fixing plate is located above a turbine high-pressure valve, and the lower pressing plate is fixed to the piston rod of the hydraulic cylinder through screws. Water tanks mounted through screws are arranged on the two sides of the upper portion of the lower pressing plate and provided with water inlet pipes and water outlet pipes, and the water inlet pipes and the water outlet pipes are designed to be telescopic water pipes. The device is reasonable in design; the water tank is designed to quickly dissipate heat when the conical surface of the high-pressure valve shell of the steam turbine is machined.

Description

Technical Field

[0001] This utility model belongs to the field of high-pressure valves for steam turbines, and particularly relates to an auxiliary device for machining the conical surface of a high-pressure valve shell for steam turbines. Background Technology

[0002] Steam turbines, also known as steam turbine engines, are rotary steam power plants. They play an important role in thermal power plants, metallurgical industries, chemical industries, and ships. Because steam turbines require high-temperature and high-pressure steam for operation, high-pressure valves need to be installed on them for safety. Existing steam turbine high-pressure valve shells have conical surfaces, and grinding and other operations are required for product quality. Currently, the machining of the conical surface of steam turbine high-pressure valve shells is mostly assisted by support rods, but support rods have low adaptability. Utility Model Content

[0003] The purpose of this utility model is to provide an auxiliary device for machining the conical surface of a high-pressure valve shell for steam turbines, so as to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An auxiliary device for machining the conical surface of a high-pressure valve casing of a steam turbine includes a column, a connecting plate, a hydraulic cylinder, a lower pressure plate, a fixed plate, a water tank, an inlet pipe, an outlet pipe, and a fixing groove. The column is designed in an inverted L-shape. A connecting plate is provided at the upper horizontal plate of the column, and the connecting plate is connected to the column. The connecting plate extends above the machining area of ​​the high-pressure valve casing of the steam turbine. A hydraulic cylinder is screw-mounted below the connecting plate. A lower pressure plate is sleeved on the piston rod of the hydraulic cylinder. The piston rod of the hydraulic cylinder is connected to the fixed plate. The fixed plate is located above the high-pressure valve of the steam turbine. The lower pressure plate is fixed to the piston rod of the hydraulic cylinder by screws. Water tanks are screw-mounted on both sides above the lower pressure plate. Inlet pipes and outlet pipes are installed on the water tanks. Both inlet pipes and outlet pipes are telescopic water pipes. The bottom of the column is connected to the fixing groove, and the fixing groove is screw-mounted to one side of the operating table.

[0006] Preferably, the fixing groove is a rectangular groove design, and a threaded screw is provided on one side of the fixing groove, which can fasten the column.

[0007] Preferably, an integrally formed insert is provided at the horizontal plate above the column, and a groove for inserting the insert is provided on the connecting plate. The insert is slidably connected to the groove on the connecting plate. A clamp is provided at the connection between the column and the connecting plate. The clamp is designed in the form of a gantry frame. Circular holes for installing the clamp are provided on the column and the connecting plate. There are multiple circular holes on the connecting plate.

[0008] Preferably, the lower pressure plate has a through groove for the hydraulic cylinder piston rod to pass through, and the fixed plate has multiple slidingly connected cylinders that can move up and down in the vertical direction. The top of the cylinder has a spring installed with screws, and the spring is connected to the bottom of the lower pressure plate.

[0009] Preferably, the inlet pipe is connected to the water pump via a pipeline, the outlet pipe connects the pipeline to the recycling tank, the water tank is filled with tap water, and the water tank, lower pressure plate, spring, cylinder, and fixing plate are all made of aluminum alloy with good heat transfer efficiency.

[0010] Compared with the prior art, this utility model has the following advantages: The design of this utility model is reasonable; the hydraulic cylinder design allows for adjustment of the height of the turbine high-pressure valve housing conical surface to be processed as needed; after multiple cylinders on the fixed plate contact the turbine high-pressure valve housing conical surface, the spring is compressed, causing the contacting cylinders to rise while the uncontacted cylinders remain stationary, thus adapting to different shapes of turbine high-pressure valve housing conical surfaces and improving adaptability; the connecting plate and the column are connected via inserts and clamps, allowing for adjustment of the connecting plate position; the water in the tank on the lower pressure plate quickly dissipates the heat generated during the processing of the turbine high-pressure valve housing conical surface, preventing excessively high temperatures from affecting the quality of the turbine high-pressure valve housing conical surface. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the auxiliary device for machining the conical surface of the high-pressure valve shell of the steam turbine according to this utility model.

[0012] Figure 2 This is an exploded view of the column and connecting plate of the auxiliary device for machining the conical surface of the high-pressure valve shell of the steam turbine according to this utility model.

[0013] Figure 3 This is a partial schematic diagram of the lower pressure plate and fixing plate of the auxiliary device for machining the conical surface of the high-pressure valve shell of the steam turbine according to this utility model. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] like Figures 1-3As shown, an auxiliary device for machining the conical surface of a high-pressure valve casing of a steam turbine includes a column 1, a connecting plate 2, a hydraulic cylinder 3, a lower pressure plate 4, a fixing plate 5, a water tank 6, an inlet pipe 7, an outlet pipe 8, and a fixing groove 9. The column 1 has an inverted L-shaped design. The connecting plate 2 is provided at the upper horizontal plate of the column 1 and is connected to the column 1. The connecting plate 2 extends above the machining area of ​​the high-pressure valve conical surface of the steam turbine. A hydraulic cylinder 3 with screws is provided below the connecting plate 2, and the lower pressure plate is sleeved on the piston rod of the hydraulic cylinder 3. 4. The piston rod of the hydraulic cylinder 3 is connected to the fixed plate 5, which is located above the high-pressure valve of the steam turbine. The lower pressure plate 4 is fixed to the piston rod of the hydraulic cylinder 3 with screws. Water tanks 6 are installed on both sides above the lower pressure plate 4 with screws. Water tanks 6 are equipped with inlet pipes 7 and outlet pipes 8. Both inlet pipes 7 and outlet pipes 8 are telescopic water pipes. The bottom of the column 1 is connected to the fixed groove 9, which is installed on one side of the operating table with screws. The fixed groove 9 is a rectangular groove design. A threaded screw 10 is provided to fasten the column 1. An integrally formed insert 13 is provided on the horizontal plate above the column 1. A groove for inserting the insert 13 is provided on the connecting plate 2. The insert 13 is slidably connected to the groove on the connecting plate 2. A clamp 11 is provided at the connection between the column 1 and the connecting plate 2. The clamp 11 is designed in a gantry style. Circular holes 12 for installing the clamp 11 are provided on the column 1 and the connecting plate 2. There are multiple circular holes on the connecting plate 2. The lower pressure plate 4 is provided with... There is a through groove 16 through which the piston rod of the hydraulic cylinder 3 passes. The fixed plate 5 is provided with multiple sliding connecting cylinders 14. The cylinders 14 can move up and down in the vertical direction. The top of the cylinder 14 is provided with a screw-mounted spring 15. The spring 15 is connected to the lower pressure plate 4. The water inlet pipe 7 is connected to the water pump through a pipe. The water outlet pipe 8 connects the pipe to the recycling tank. The water tank 6 is filled with tap water. The water tank 6, the lower pressure plate 4, the spring 15, the cylinders 14 and the fixed plate 5 are all made of aluminum alloy with good heat transfer efficiency.

[0016] The working principle of this utility model is as follows: First, the column is fixed using a fixing groove and screw. The connecting plate is adjusted according to the conical surface of the high-pressure valve shell of the steam turbine. Under the action of the insert and clamp, the position of the connecting plate can be adjusted in the horizontal direction. After the position of the connecting plate is determined, it is fixed using clamp. According to the height of the conical surface of the high-pressure valve shell of the steam turbine, the lower pressure plate and the fixing plate are adjusted by a hydraulic cylinder. After the multiple cylinders on the fixing plate come into contact with the conical surface of the high-pressure valve shell of the steam turbine, the spring is compressed, causing the contacting cylinders to rise, while the uncontacted cylinders remain stationary. The rising and stationary position of the multiple cylinders form the shape of the conical surface of the high-pressure valve shell of the steam turbine, thereby fixing the conical surface of the high-pressure valve shell of the steam turbine. After fixing, the movement can perform processing operations on the conical surface of the high-pressure valve shell of the steam turbine. Since the water tank, lower pressure plate, spring, cylinders and fixing plate are made of aluminum alloy, the heat generated during the processing of the conical surface of the high-pressure valve shell of the steam turbine can be quickly carried away by tap water.

[0017] The above description is a preferred embodiment of the present utility model. For those skilled in the art, any changes, modifications, substitutions and variations made to the implementation methods without departing from the principles and spirit of the present utility model, based on the teachings of the present utility model, still fall within the protection scope of the present utility model.

Claims

1. An auxiliary device for machining the conical surface of a high-pressure valve casing of a steam turbine, comprising a column (1), a connecting plate (2), a hydraulic cylinder (3), a lower pressure plate (4), a fixing plate (5), a water tank (6), an inlet pipe (7), an outlet pipe (8), and a fixing groove (9), characterized in that, The column (1) is designed in an inverted L shape. A connecting plate (2) is provided at the upper horizontal plate of the column (1). The connecting plate (2) is connected to the column (1). The connecting plate (2) extends to the upper part of the turbine high pressure valve cone surface. A hydraulic cylinder (3) is installed with screws below the connecting plate (2). A lower pressure plate (4) is sleeved on the piston rod of the hydraulic cylinder (3). The piston rod of the hydraulic cylinder (3) is connected to a fixed plate (5). The fixed plate (5) is located above the turbine high pressure valve. The lower pressure plate (4) is fixed to the piston rod of the hydraulic cylinder (3) with screws. Water tanks (6) are installed with screws on both sides above the lower pressure plate (4). Water inlet pipe (7) and water outlet pipe (8) are installed on the water tank (6). Both the water inlet pipe (7) and the water outlet pipe (8) are telescopic water pipes. The bottom of the column (1) is connected to a fixed groove (9). The fixed groove (9) is installed on one side of the operating table with screws.

2. The auxiliary device for machining the conical surface of a high-pressure valve casing of a steam turbine according to claim 1, characterized in that, The fixing groove (9) is a rectangular groove design. A threaded screw (10) is provided on one side of the fixing groove (9). The screw (10) can fasten the column (1).

3. The auxiliary device for machining the conical surface of a high-pressure valve casing of a steam turbine according to claim 1, characterized in that, An integrally formed insert (13) is provided on the horizontal plate above the column (1). A groove for inserting the insert (13) is provided on the connecting plate (2). The insert (13) is slidably connected to the groove on the connecting plate (2). A clip (11) is provided at the connection between the column (1) and the connecting plate (2). The clip (11) is designed in the form of a gantry frame. The column (1) and the connecting plate (2) are provided with round holes (12) for installing the clip (11). There are multiple round holes on the connecting plate (2).

4. The auxiliary device for machining the conical surface of a high-pressure valve casing of a steam turbine according to claim 1, characterized in that, The lower pressure plate (4) has a through groove (16) through which the piston rod of the hydraulic cylinder (3) passes. The fixed plate (5) has multiple sliding connecting cylinders (14). The cylinders (14) can move up and down in the vertical direction. The top of the cylinder (14) is provided with a screw-mounted spring (15), which is connected to the bottom of the lower pressure plate (4).

5. The auxiliary device for machining the conical surface of a high-pressure valve casing of a steam turbine according to claim 4, characterized in that, The inlet pipe (7) is connected to the water pump via a pipeline, and the outlet pipe (8) connects the pipeline to the recycling pool. The water tank (6) is filled with tap water. The water tank (6), the lower pressure plate (4), the spring (15), the cylinder (14), and the fixing plate (5) are all made of aluminum alloy with good heat transfer efficiency.

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