Machining tool for stator blade type hole in partition plate shroud ring of impulse type steam turbine

Abstract

The utility model discloses a tool for machining a stator blade type hole in a partition plate shroud ring of an impulse type steam turbine, and belongs to the technical field of steam turbine accessory machining. The machining tool for the stator blade type hole in the partition plate shroud ring of the impulse type steam turbine comprises a machine base, laser equipment is fixedly installed on the top of the machine base, the two negative pressure pipes are both installed on the machine base, a negative pressure part is arranged on the machine base, and the negative pressure part is used for enabling the negative pressure pipes to continuously generate negative pressure; the two sliding blocks are both installed in the machine base, and the negative pressure pipes are fixedly connected to the sliding blocks; by starting the air pump, negative pressure is continuously generated in the negative pressure pipe, a worker can conveniently and quickly adsorb and fix a stator blade workpiece at the top end of the negative pressure pipe, the surface of a stator blade is prevented from being damaged by clamping by adopting a negative pressure adsorption mode, and the subsequent use quality of the stator blade is further ensured.

Description

Technical Field

[0001] This utility model relates to the field of turbine parts processing technology, and in particular to a tooling for processing stationary blade-shaped holes on the diaphragm band of an impulse turbine. Background Technology

[0002] The diaphragm of an impulse turbine is one of the most important components of a steam turbine. Its function is to divide the steam into multiple stages for expansion and work, and to convert kinetic energy into mechanical energy through stationary blades. The stationary blades are stationary blades fixed on the diaphragm band. In the steam turbine, the stationary blades not only guide the airflow, but also accelerate the steam. The machining accuracy of the stationary blade profile directly affects the efficiency and operational stability of the steam turbine.

[0003] Currently, during the production of stationary blades, workers need to drill holes on their surfaces. Typically, workers use clamps to press and fix the stationary blades, and then use laser equipment to cut and drill holes on the surface of the stationary blades. Laser drilling can ensure the processing accuracy of the workpiece and improve processing efficiency.

[0004] However, in actual processing, the traditional clamping and fixing method makes it easy for clamp marks to appear on the surface of the stationary blade, causing damage to the stationary blade and affecting its subsequent use quality. Furthermore, during processing, the high temperature during laser cutting of metal causes some of the material to evaporate, forming metal vapor and other compounds. After cooling, these substances turn into tiny metal particles suspended in the air, forming fumes that pollute the environment and harm the health of workers. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the surface of the stationary blade is easily damaged during the machining of the hole in the stationary blade, and the fumes generated during the machining process also pollute the environment and harm the health of workers. Therefore, this invention proposes a tooling for machining the hole of the stationary blade on the diaphragm belt of an impulse steam turbine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A tooling for machining stationary blade-shaped holes on the diaphragm band of an impulse steam turbine includes a base with a laser device fixedly mounted on the top, and further includes: two negative pressure pipes, both mounted on the base, wherein the base has a negative pressure section for continuously generating negative pressure within the negative pressure pipes; two sliders, both mounted inside the base, wherein the negative pressure pipes are fixedly connected to the sliders; the base has a driving component for driving the two sliders to move in opposite directions and out of direction; and the base has a purification section for filtering flue gas.

[0008] To generate suction in the negative pressure tube, preferably, the negative pressure unit includes an air pump fixedly mounted on the base, and the two negative pressure tubes are connected by a telescopic hose A. The negative pressure tube is connected to an air inlet pipe, the air inlet end of the air pump is connected to the telescopic hose A through an air suction pipe, and the air outlet end of the air pump is connected to an exhaust pipe.

[0009] To facilitate adjustment of the distance between the two negative pressure pipes, preferably, the driving component includes a double-ended screw rotatably connected to the base, and a geared motor is fixedly installed in the base. The output end of the geared motor and the surface of the double-ended screw are both fixedly connected to pulleys connected by belts. The two sliders are respectively threaded to both sides of the outer wall of the double-ended screw, and the sliders are slidably installed in the base.

[0010] To guide the slider, a guide tube is fixedly connected inside the base, and the slider is laterally slidably connected to the guide tube.

[0011] To purify the fumes generated during drilling, preferably, the purification unit includes a purification box fixedly connected to the base. Mounting rails are fixedly connected to both sides of the inner wall of the purification box. An activated carbon filter and a HEPA filter are inserted between the two mounting rails. An air outlet is provided through the bottom of the purification box. The end of the exhaust pipe furthest from the air pump is connected to the purification box. An air intake assembly is provided on the base.

[0012] To further improve purification efficiency, the air intake assembly includes a horizontal tube fixedly installed on the top of the base, with an air intake nozzle connected to the horizontal tube, and the bottom of the horizontal tube connected to the air intake pipe via a telescopic flexible hose B.

[0013] Compared with the prior art, this utility model provides a tooling for machining stationary blade-shaped holes on the diaphragm band of an impulse steam turbine, which has the following beneficial effects:

[0014] 1. The tooling for machining stationary blade profile holes on the diaphragm band of this impulse turbine uses an air pump to continuously generate negative pressure in the negative pressure pipe, which allows workers to quickly adsorb and fix the stationary blade workpiece to the top of the negative pressure pipe. By using negative pressure adsorption, the surface of the stationary blade will not be damaged, thus ensuring the subsequent use quality of the stationary blade.

[0015] 2. The tooling for machining stationary blade-shaped holes on the diaphragm band of this impulse turbine, through the combined use of an air pump, air intake nozzle, activated carbon filter, and HEPA filter, can fully utilize the adsorption force formed during negative pressure fixation and achieve the purpose of purifying the flue gas generated during drilling, preventing the flue gas from spreading and polluting the environment, thereby ensuring the health of the staff.

[0016] 3. The tooling for machining stationary blade profile holes on the diaphragm band of this impulse turbine can easily adjust the distance between the two negative pressure pipes by starting the geared motor, so as to support and fix stationary blades of different specifications and sizes, thereby improving the applicability of the tooling.

[0017] The parts not covered in this device are the same as or can be implemented using existing technology. This utility model solves the problem that the surface of the stationary blade is easily damaged by clamping during the drilling process of the stationary blade, and the fumes generated during the process also pollute the environment and thus harm the health of workers. Attached Figure Description

[0018] Figure 1 This is a first-view isometric structural diagram of a tooling for machining stationary blade-shaped holes on the diaphragm band of an impulse steam turbine, as proposed in this utility model.

[0019] Figure 2 This is a second-view isometric structural diagram of a tooling for machining stationary blade-shaped holes on the diaphragm band of an impulse steam turbine, as proposed in this utility model.

[0020] Figure 3 This invention provides a partial isometric view of a tooling for machining stationary blade profile holes on the diaphragm band of an impulse turbine. Figure 1 ;

[0021] Figure 4 This invention provides a partial isometric view of a tooling for machining stationary blade profile holes on the diaphragm band of an impulse turbine. Figure 2 ;

[0022] Figure 5 This is a schematic cross-sectional view of the purification box structure of the tooling for machining stationary blade-shaped holes on the diaphragm band of an impulse steam turbine, as proposed in this utility model.

[0023] In the diagram: 1. Base; 2. Negative pressure pipe; 3. Double-ended screw; 31. Gear motor; 32. Pulley; 33. Slider; 34. Guide tube; 4. Air pump; 41. Intake pipe; 42. Exhaust pipe; 43. Telescopic hose A; 44. Inlet pipe; 5. Purification box; 51. Mounting rail; 52. Activated carbon filter; 53. HEPA filter; 54. Air outlet; 6. Horizontal pipe; 61. Intake nozzle; 62. Telescopic hose B; 8. Laser equipment. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Example:

[0027] Reference Figures 1-5 This utility model provides a tooling for machining stationary blade-shaped holes on the diaphragm band of an impulse steam turbine. It includes a base 1 with a laser device 8 fixedly mounted on its top, and two negative pressure pipes 2, both mounted on the base 1. An anti-slip pad, made of rubber, is fixedly connected to the top of each negative pressure pipe 2 to improve its anti-slip properties. The base 1 has a negative pressure section for continuously generating negative pressure within the negative pressure pipes 2. Two sliders 33 are also mounted within the base 1, with the negative pressure pipes 2 fixedly connected to the sliders 33. The base 1 has a driving component for driving the two sliders 33 to move in opposite directions and outwards. The base 1 also has a purification section for filtering flue gas.

[0028] Specifically, during use, the negative pressure section allows for continuous negative pressure within the negative pressure pipe 2, facilitating the worker's quick adsorption and fixation of the stationary blade workpiece to the top of the negative pressure pipe 2. The negative pressure adsorption method prevents surface damage to the stationary blade, ensuring its subsequent performance. The purification section fully utilizes the adsorption force generated during negative pressure fixation, purifying the fumes generated during drilling and preventing their spread and environmental pollution, thus protecting the health of workers. The drive mechanism allows for easy adjustment of the distance between the two negative pressure pipes 2, enabling support and fixation of stationary blades of different sizes, thereby improving the tooling's applicability.

[0029] The negative pressure unit includes an air pump 4 fixedly installed on the base 1. Two negative pressure pipes 2 are connected by a telescopic hose A43. The negative pressure pipe 2 is connected to an air inlet pipe 44. The air inlet end of the air pump 4 is connected to the telescopic hose A43 through an air suction pipe 41. The air outlet end of the air pump 4 is connected to an exhaust pipe 42.

[0030] Specifically, during use, by activating the air pump 4, external air enters the negative pressure pipe 2 through the air inlet pipe 44. This allows the air inside the negative pressure pipe 2, as well as the external air entering, to be discharged through the telescopic hose A43, the suction pipe 41, and the exhaust pipe 42. This continuously generates negative pressure inside the negative pressure pipe 2, making it easier for workers to quickly adsorb and fix the stationary blade workpiece to the top of the negative pressure pipe 2. By using negative pressure adsorption, the surface of the stationary blade will not be damaged, thus ensuring the subsequent use quality of the stationary blade.

[0031] The driving component includes a double-ended screw 3 rotatably connected to the base 1. A geared motor 31 is fixedly installed inside the base 1. The output end of the geared motor 31 and the surface of the double-ended screw 3 are both fixedly connected to pulleys 32 connected by belts. Two sliders 33 are respectively threaded to both sides of the outer wall of the double-ended screw 3. The sliders 33 are slidably installed inside the base 1. A guide tube 34 is fixedly connected inside the base 1. The sliders 33 are laterally slidably connected to the guide tube 34.

[0032] Specifically, during use, by starting the reduction motor 31, the pulley 32 and the double-headed screw 3 are driven to rotate. Under the action of the opposite threads, the two sliders 33 drive the two negative pressure pipes 2 to move towards each other or away from each other. This allows for easy adjustment of the distance between the two negative pressure pipes 2, so as to support and fix stationary blades of different specifications and sizes, thereby improving the applicability of the tooling. Furthermore, the guide tube 34 can guide the sliders 33, thereby improving their stability in use.

[0033] The purification unit includes a purification box 5 fixedly connected to the base 1. Both sides of the inner wall of the purification box 5 are fixedly connected to the mounting rails 51. An activated carbon filter element 52 and a HEPA filter element 53 are inserted between the two mounting rails 51. An air outlet 54 is opened through the bottom of the purification box 5. The end of the exhaust pipe 42 away from the air pump 4 is connected to the purification box 5. An air intake assembly is provided on the base 1. The air intake assembly includes a horizontal pipe 6 fixedly installed on the top of the base 1. An air intake nozzle 61 is connected to the horizontal pipe 6. The bottom of the horizontal pipe 6 is connected to the air intake pipe 44 through a telescopic flexible hose B62.

[0034] Specifically, during use, external smoke can be discharged into the purification box 5 through the exhaust pipe 42, and the smoke is purified and filtered layer by layer through the activated carbon filter 52 and HEPA filter 53. The filtered gas is then discharged through the air outlet 54. Through the coordinated use of the air pump 4, activated carbon filter 52, HEPA filter 53 and air intake components, the adsorption force formed in the negative pressure fixation can be fully utilized to purify the smoke generated during drilling, preventing the smoke from spreading and polluting the environment, thus ensuring the health of the staff. Furthermore, the horizontal pipe 6, air intake nozzle 61 and telescopic hose B62 can expand the air intake range, thereby greatly improving the purification efficiency of the smoke.

[0035] Working principle: In the process of using this impulsive steam turbine diaphragm belt stationary blade hole machining fixture, the stationary blade workpiece is first placed on the top of the negative pressure pipe 2. Then, the air pump 4 is started, so that the outside air enters the negative pressure pipe 2 through the air inlet pipe 44. The air in the negative pressure pipe 2 and the outside air are discharged through the telescopic hose A43, the air intake pipe 41 and the exhaust pipe 42. This can continuously generate negative pressure in the negative pressure pipe 2, which makes it easy for the worker to quickly adsorb and fix the stationary blade workpiece on the top of the negative pressure pipe 2. By using negative pressure adsorption, the surface of the stationary blade will not be damaged, thus ensuring the subsequent use quality of the stationary blade. After the workpiece is fixed, the stationary blade can be machined by starting the laser equipment 8.

[0036] In addition, during the laser processing, under the action of the air pump 4, the externally generated smoke is drawn into the horizontal pipe 6 by the air inlet 61, and enters the negative pressure pipe 2 through the telescopic hose B62 and the air inlet pipe 44. At the same time, it is discharged into the purification box 5 through the telescopic hose A43, the air inlet pipe 41 and the exhaust pipe 42. The smoke is purified and filtered layer by layer through the activated carbon filter element 52 and the HEPA filter element 53, and the filtered gas is discharged through the air outlet 54.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tooling for machining stationary blade-shaped holes on the diaphragm band of an impulse steam turbine, comprising a base (1) with a laser device (8) fixedly mounted on its top, characterized in that, Also includes: Two negative pressure pipes (2) are both installed on the base (1). The base (1) is provided with a negative pressure section, which is used to continuously generate negative pressure in the negative pressure pipe (2); Both sliders (33) are installed inside the base (1). The negative pressure pipe (2) is fixedly connected to the slider (33), the base (1) is provided with a driving component for driving the two sliders (33) to move towards each other and away from each other, and the base (1) is provided with a purification section for filtering the flue gas.

2. The tooling for machining stationary blade profile holes on the diaphragm band of an impulse steam turbine according to claim 1, characterized in that, The negative pressure unit includes an air pump (4) fixedly installed on the base (1), and the two negative pressure pipes (2) are connected by a telescopic hose A (43). The negative pressure pipe (2) is connected to the air inlet pipe (44), the air inlet end of the air pump (4) is connected to the telescopic hose A (43) through the air intake pipe (41), and the air exhaust end of the air pump (4) is connected to the exhaust pipe (42).

3. The tooling for machining stationary blade profile holes on the diaphragm band of an impulse steam turbine according to claim 1, characterized in that, The driving component includes a double-headed screw (3) rotatably connected in the base (1), and a geared motor (31) is fixedly installed in the base (1). The output end of the geared motor (31) and the surface of the double-ended screw (3) are both fixedly connected to pulleys (32) connected by belts. The two sliders (33) are respectively threaded to both sides of the outer wall of the double-ended screw (3). The sliders (33) are slidably installed in the base (1).

4. The tooling for machining stationary blade profile holes on the diaphragm band of an impulse steam turbine according to claim 3, characterized in that, The base (1) is fixedly connected to a guide tube (34), and the slider (33) is slidably connected to the guide tube (34) laterally.

5. The tooling for machining stationary blade profile holes on the diaphragm band of an impulse steam turbine according to claim 2, characterized in that, The purification unit includes a purification box (5) fixedly connected to the base (1), and mounting rails (51) are fixedly connected to both sides of the inner wall of the purification box (5). An activated carbon filter (52) and a HEPA filter (53) are inserted between the two mounting rails (51). An air outlet (54) is provided through the bottom of the purification box (5). The end of the exhaust pipe (42) away from the air pump (4) is connected to the purification box (5). An air intake assembly is provided on the base (1).

6. The tooling for machining stationary blade profile holes on the diaphragm band of an impulse steam turbine according to claim 5, characterized in that, The suction assembly includes a horizontal tube (6) fixedly installed on the top of the base (1), with a suction nozzle (61) connected to the horizontal tube (6), and the bottom of the horizontal tube (6) connected to the air inlet pipe (44) through a telescopic hose B (62).

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