A turbine blade cleaning device for a thermal power plant

Abstract

This invention discloses a steam turbine blade cleaning device for thermal power plants, specifically relating to the field of steam turbine blade cleaning technology. The steam turbine blade cleaning device for thermal power plants includes: a conveyor, which is either a belt conveyor or a metal mesh bag conveyor; multiple fixed seats are installed on the conveyor belt, with equal spacing between the fixed seats; steam turbine blades can be mounted on the fixed seats; laser heads are arranged on both sides above the conveyor, and the two laser heads respectively perform laser cleaning on two surfaces of the steam turbine blades, removing impurities and rust from the blades; a first sensor is installed below the laser heads, and the first sensor can detect the steam turbine blades. The steam turbine blade cleaning device for thermal power plants provided by this invention uses two laser heads to perform laser cleaning on two surfaces of the steam turbine blades respectively, removing impurities and rust from the blades; and, in conjunction with the conveyor, makes the cleaning speed faster and more efficient.

Description

Technical Field

[0001] This invention relates to the field of turbine blade cleaning technology, and more particularly to a turbine blade cleaning device for thermal power plants. Background Technology

[0002] Steam turbine blades are a crucial piece of equipment in thermal power plants, serving as a key component of the turbine. These blades, arranged in a cascade, complete the energy conversion process of steam. The blades of thermal power plant steam turbines are typically made of high-quality carbon structural steel, such as 20CrMnTiB and 20CrMoB. Dust and dirt on the turbine blades can impede steam flow, leading to decreased efficiency. Furthermore, corrosion or other damage to the blades can cause instability and accidents. Therefore, regular cleaning of the turbine blades is necessary to maintain the turbine's efficiency and safety. Currently, laser cleaning is commonly used; it is a highly efficient method for cleaning turbine blades, quickly and accurately removing dirt and deposits without causing any damage.

[0003] A laser cleaning device for cleaning carbon deposits on aero-engine blades, authorized by announcement number CN213194883U, includes an interconnected actuator control cabinet, a dust collection and filtration recovery device, a laser cleaning host, an actuator, and a laser cleaning platform. The laser cleaning host generates, conducts, and controls the laser to emit laser light with preset parameters, achieving the laser cleaning function. The actuator carries and controls the movement trajectory of the laser cleaning head, cleaning various areas of the blade to be processed. The laser cleaning platform is fixed with a rotating device and positioning and clamping fixtures. The positioning and clamping fixtures are used to position and clamp the blade to be processed and adjust the blade's attitude for rotation, aligning each surface of the blade with the laser cleaning head. The rotating device can rotate independently or be controlled in conjunction with the actuator. The dust collection and filtration recovery device is used to recover the dust generated by the laser cleaning head during the cleaning process. The advantages of this device are better cleaning effect, environmental friendliness, and high safety.

[0004] However, this device can only clean one blade at a time, which results in low cleaning efficiency. Since each turbine cleaning involves cleaning hundreds of blades, using the aforementioned equipment to clean the blades would undoubtedly consume a lot of time.

[0005] Therefore, it is necessary to provide a steam turbine blade cleaning device for thermal power plants to solve the above-mentioned technical problems. Summary of the Invention

[0006] In response to the above situation and to overcome the defects of the existing technology, the present invention provides a steam turbine blade cleaning device for thermal power plants. Two laser heads perform laser cleaning on two surfaces of the steam turbine blades respectively, removing impurities and rust from the blades. At the same time, in conjunction with a conveyor, the cleaning speed is faster and the efficiency is higher.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A steam turbine blade cleaning device for thermal power plants includes: a conveyor, which is either a belt conveyor or a metal mesh bag machine; multiple fixed seats are installed on the conveyor belt of the conveyor, and the fixed seats are spaced equidistantly; the steam turbine blades can be installed on the fixed seats; laser heads are installed on both sides above the conveyor, and the two laser heads respectively perform laser cleaning on two surfaces of the steam turbine blades to remove impurities and rust from the blades; a first sensor is installed below the laser heads, and the first sensor can detect the steam turbine blades.

[0009] Preferably, the conveyor is equipped with a protective cover, the protective cover is equipped with a fan, the fan is equipped with an exhaust pipe, and the exhaust pipe is connected to the waste gas treatment equipment.

[0010] Preferably, a feeding assembly is provided at one end of the conveyor. The feeding assembly is used to place the turbine blades on the fixed seat. The feeding assembly includes a feeding pipe into which the root of the turbine blade can be inserted. One side of the feeding pipe is open. A groove plate is movably provided on one side of the feeding pipe. A lifting cylinder fixed to the feeding pipe is installed on the groove plate. Pushing cylinders are installed on both sides of the groove plate. Push plates are fixed at the output ends of the pushing cylinders. A fixing cylinder fixed to the feeding pipe is provided below the pushing cylinder. A pressure plate is installed on the output shaft of the fixing cylinder.

[0011] Preferably, elongated holes are provided on both sides of the discharge pipe, and the two push plates are respectively located in the corresponding elongated holes.

[0012] Preferably, fixing holes are provided on both sides of the discharge pipe, and the two pressure plates are respectively located in the corresponding fixing holes.

[0013] Preferably, the bottom end of the discharge pipe is provided with a movable groove. When the blade at the bottom of the discharge pipe is installed on the fixed seat, part of the blade is still located in the discharge pipe, and the top of the blade is lower than the top of the movable groove.

[0014] Preferably, a second sensor is provided on one side of the conveyor.

[0015] Preferably, a rotating assembly is also installed at one end of the conveyor. The rotating assembly includes a rotating frame fixed to the discharge pipe, a rotating shaft that is rotatably connected to the conveyor is fixedly installed on the rotating frame, a worm gear is fixedly installed at one end of the rotating shaft, a motor is provided on one side of the conveyor, and a worm that meshes with the worm gear is installed on the output shaft of the motor.

[0016] Preferably, the steam turbine blade cleaning device for thermal power plants further includes an extension tube, with two insert rods at the bottom of the extension tube and two protrusions on the inner side of the discharge tube, each of which has a slot.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) In this invention, two laser heads perform laser cleaning on two surfaces of the turbine blades respectively, removing impurities and rust from the blades. At the same time, in conjunction with the conveyor, the cleaning speed is faster and the efficiency is higher.

[0019] (2) The protective cover of the present invention collects the exhaust gas generated by the laser head cleaning blades, and the fan transports the exhaust gas to the exhaust gas treatment equipment for treatment.

[0020] (3) The material feeding component in this invention can automatically place the turbine blades on the fixed seat, making the material feeding more intelligent and promoting the cleaning efficiency of the turbine blades to a certain extent.

[0021] (4) In this invention, the rotating component is used to rotate the feeding component, so that the feeding component is rotated from the vertical position to the horizontal position, reducing its height, so that personnel can place the turbine blades into the feeding component.

[0022] (5) In this invention, the extension tube is used to extend the length of the discharge tube, so that more turbine blades can be placed at one time. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of the steam turbine blade cleaning device for thermal power plants provided by the present invention;

[0024] Figure 2 A schematic diagram of the structure of the steam turbine blade cleaning device for thermal power plants provided by the present invention, with a protective cover installed;

[0025] Figure 3 This is a schematic diagram of the structure of the fixing seat and the turbine blade in the steam turbine blade cleaning device for thermal power plants provided by the present invention.

[0026] Figure 4 This is a schematic diagram of the material feeding assembly and the rotating assembly in the steam turbine blade cleaning device for thermal power plants provided by the present invention.

[0027] Figure 5 for Figure 4 Enlarged view of section A;

[0028] Figure 6 This is a schematic diagram showing the discharging assembly in the steam turbine blade cleaning device for thermal power plants provided by the present invention.

[0029] Figure 7A schematic diagram of an embodiment of the steam turbine blade cleaning device for thermal power plants provided by the present invention;

[0030] Figure 8 This is a schematic diagram of the assembly of the extension pipe and the discharge pipe in the steam turbine blade cleaning device for thermal power plants provided by the present invention;

[0031] Figure 9 This is a schematic diagram of the extension pipe and discharge pipe in the steam turbine blade cleaning device for thermal power plants provided by the present invention.

[0032] Figure 10 This is a schematic diagram of the material discharge pipe in the steam turbine blade cleaning device for thermal power plants provided by the present invention.

[0033] The corresponding names of the attached figures are as follows: 1-Conveyor, 2-Fixed base, 3-Laser head, 4-First sensor, 5-Protective cover, 6-Fan, 7-Discharge pipe, 71-Moving trough, 72-Protrusion, 73-Slot, 8-Discharge pipe, 9-Lifting cylinder, 10-Lifting cylinder, 11-Push plate, 12-Elongated hole, 13-Fixed cylinder, 14-Pressure plate, 15-Pressure plate, 16-Second sensor, 17-Rotating frame, 18-Rotating frame, 19-Worm gear, 20-Motor, 21-Worm, 22-Extension tube, 23-Insertion rod. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0035] Example 1

[0036] like Figure 1-2As shown, the present invention provides a steam turbine blade cleaning device for thermal power plants, comprising: a conveyor 1, which is a belt conveyor or a metal mesh bag conveyor; multiple fixed seats 2 are installed on the conveyor belt of the conveyor 1, the multiple fixed seats 2 being equally spaced; steam turbine blades can be installed on the fixed seats 2; when the steam turbine blades are installed on the fixed seats 2, the conveyor is started, and the conveyor belt will drive the steam turbine blades to move through the fixed seats 2; laser heads 3 are provided on both sides above the conveyor 1 (the laser heads 3 are equipped with a host and corresponding control equipment as in the prior art, not shown in the figure); two laser heads 3. Laser cleaning is performed on both sides of the turbine blade to remove impurities and rust. Specifically, after the first laser head 3 cleans one side of the blade, the other laser head 3 cleans the other side of the blade. The two sides of the blade are not cleaned simultaneously. A first sensor 4 is installed below the laser head 3. The first sensor 4 can detect the turbine blade. When the first sensor 4 detects the turbine blade, it will activate the laser head 3 and clean the turbine blade. When the first sensor 4 does not detect the turbine blade, the laser head 3 will turn off.

[0037] Example 2

[0038] like Figure 1 As shown, a protective cover 5 is installed on the conveyor 1, a fan 6 is installed on the protective cover 5, and an exhaust pipe is installed on the fan 6. The exhaust pipe is connected to the waste gas treatment equipment. In this embodiment, the protective cover 5 collects the waste gas generated by the cleaning blades of the laser head 3, and the fan 6 transports the waste gas to the waste gas treatment equipment for treatment.

[0039] Example 3

[0040] like Figure 1-6As shown, a feeding assembly is provided at one end of the conveyor 1. The feeding assembly is used to place turbine blades on the fixed seat 2. The feeding assembly includes a feeding pipe 7, into which the root of the turbine blade can be inserted. One side of the feeding pipe 7 is open. When the root of the turbine blade is located in the feeding pipe 7, its blade passes through the opening of the feeding pipe 7, and the turbine blades placed in the feeding pipe 7 are stacked. A groove plate 8 is movably provided on one side of the feeding pipe 7. A lifting cylinder 9 fixed to the feeding pipe 7 is installed on the groove plate 8. After the lifting cylinder 9 is started, it will drive the groove plate 8 to move up or down. Pushing cylinders 10 are installed on both sides of the groove plate 8. Push plates 11 are fixed to the output end of the pushing cylinders 10. When the pushing cylinders 10 extend, the pushing cylinders 10 drive the push plates 11 to move and interact with the blade roots located inside the feeding pipe 7. (This is the blade root of the second blade from the bottom of the feed tube 7) in contact. At this time, the blade root is fixed by two push plates 11. A fixing cylinder 13 is provided below the push cylinder 10 to fix the feed tube 7. A pressure plate 14 is installed on the output shaft of the fixing cylinder 13. After the fixing cylinder 13 extends, it will drive the pressure plate 14 to move and press on the blade root (this is the blade root of the first blade from the bottom of the feed tube 7), fixing the blade inside the feed tube 7. The specific operation steps of this embodiment are as follows: When it is necessary to place the blade located inside the feed tube 7 onto the fixing seat 2, first start the push cylinder 10 to make the corresponding blade root of the push plate 11 contact. Then, start the fixing cylinder 13 to make the pressure plate 14 move away from the blade root. At this time, the blade located at the bottom of the feed tube 7 will move downward under the action of gravity and fall onto the fixing seat 2 and be fixed.

[0041] Furthermore, elongated holes 12 are provided on both sides of the discharge pipe 7, and the two push plates 11 are respectively located in the corresponding elongated holes 12.

[0042] Furthermore, fixing holes 15 are provided on both sides of the feeding pipe 7, and the two pressure plates 14 are respectively located in the corresponding fixing holes 15.

[0043] Furthermore, a movable groove 71 is provided at the bottom end of the discharge pipe 7. When the blades at the bottom of the discharge pipe 7 are installed on the fixed seat 2, part of the blades are still located in the discharge pipe 7, and the top of the blades is lower than the top of the movable groove 71. As the conveyor moves, the blades will be driven to move through the fixed seat 2 and pass through the movable groove 71. If the movable groove 71 is not provided, the blades will not be able to move under the drive of the fixed seat 2.

[0044] Example 4

[0045] like Figure 4As shown, a second sensor 16 is provided on one side of the conveyor 1. When the second sensor 16 detects the fixed seat, the power supply of the conveyor 1 is turned off, causing the conveyor 1 to stop rotating immediately. At this time, the feeding assembly starts to move and places the turbine blade on the fixed seat 2. After a specific time, the conveyor 1 is restarted. During this time period, the feeding assembly completes the process of placing one turbine blade on the fixed seat 2.

[0046] Example 5

[0047] like Figure 4 As shown, a rotating assembly is also installed at one end of the conveyor 1. The rotating assembly is used to rotate the feeding assembly, causing it to rotate from a vertical position to a horizontal position, lowering its height so that personnel can place turbine blades into the feeding assembly. The rotating assembly includes a rotating frame 17 fixed to the feeding pipe 7. A rotating shaft 18 rotatably connected to the conveyor 1 is fixedly installed on the rotating frame 17. A worm gear 19 is fixedly installed at one end of the rotating shaft 18. A motor 20 is provided on one side of the conveyor 1. The output shaft is equipped with a worm 21 that meshes with the worm gear 19. When the feeding assembly needs to be rotated, the motor 20 is started to make the worm 21 rotate. The rotation of the worm 21 drives the worm gear 19 to rotate. The worm gear 19 drives the rotating frame 17 to rotate through the rotating shaft 18. The rotating frame 17 then drives the feeding assembly to rotate. After the feeding assembly has rotated 90°, the power of the motor 20 is turned off. At this time, personnel can place multiple blades that need to be cleaned into the feeding assembly. After the blades are placed, the motor 20 is started in reverse to make the feeding assembly return to the initial position.

[0048] Example 6

[0049] like Figure 8-10 As shown, the steam turbine blade cleaning device for thermal power plants also includes an extension tube 22. The extension tube 22 is used to extend the length of the discharge tube 7, so that more steam turbine blades can be placed at one time. Two insert rods 23 are provided at the bottom of the extension tube 22. Two protrusions 72 are provided on the inner side of the discharge tube 7. Each of the two protrusions 72 has a slot 73. When the discharge tube 7 is connected to the extension tube 22, the insert rods 23 are inserted into the slots 73. After the insert rods 23 are inserted into the slots 73, the extension tube 22 and the discharge tube 7 are fixed with screws.

[0050] Working principle:

[0051] In use, first place an appropriate amount of turbine blades on the feeding assembly, making the feeding assembly vertical, and then start the conveyor 1. When the second sensor 16 detects the fixed seat 2, immediately stop the conveyor 1. At this time, the feeding assembly installs turbine blades on the fixed seat 2. After a certain period of time, the conveyor 1 is started again. When the first sensor 4 detects the turbine blades, the main unit will be started, and the laser head 3 will clean the turbine blades. The flue gas generated during cleaning is transported to the exhaust gas treatment equipment by the fan 6.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cleaning device for steam turbine blades in a thermal power plant, characterized in that, include: Conveyor (1), multiple fixed seats (2) are installed on the conveyor belt of the conveyor (1), and laser heads (3) are provided on both sides above the conveyor (1). The two laser heads (3) respectively perform laser cleaning on the two surfaces of the turbine blades. A first sensor (4) is installed below the laser head (3) to detect the position of the turbine blades and control the start and stop of the corresponding laser head (3). One end of the conveyor (1) is provided with a feeding assembly, which includes a feeding pipe (7). The root of the turbine blade can be inserted into the feeding pipe (7). One side of the feeding pipe (7) is open. A groove plate (8) is movably provided on one side of the feeding pipe (7). A lifting cylinder (9) fixed to the feeding pipe (7) is installed on the groove plate (8). Push cylinders (10) are installed on both sides of the groove plate (8). Push plates (11) are fixed at the output ends of the push cylinders (10). A fixing cylinder (13) fixed to the feeding pipe (7) is provided below the push cylinder (10). A pressure plate (14) is installed on the output shaft of the fixing cylinder (13). The bottom end of the discharge pipe (7) is provided with a moving groove (71). When the blade at the bottom of the discharge pipe (7) is installed on the fixed seat (2), part of the blade is still located in the discharge pipe (7), and the top of the part located in the discharge pipe (7) is lower than the top of the moving groove (71). A rotating assembly is also installed at one end of the conveyor (1). The rotating assembly includes a rotating frame (17) fixed to the discharge pipe (7). A rotating shaft (18) rotatably connected to the conveyor (1) is fixedly installed on the rotating frame (17). A worm gear (19) is fixedly installed at one end of the rotating shaft (18). A motor (20) is provided on one side of the conveyor (1). A worm (21) meshing with the worm gear (19) is installed on the output shaft of the motor (20).

2. The steam turbine blade cleaning device for thermal power plants according to claim 1, characterized in that, The conveyor (1) is equipped with a protective cover (5), and the protective cover (5) is equipped with a fan (6).

3. The steam turbine blade cleaning device for thermal power plants according to claim 1, characterized in that, The feeding pipe (7) has elongated holes (12) on both sides, and the two push plates (11) are respectively located in the corresponding elongated holes (12).

4. The steam turbine blade cleaning device for thermal power plants according to claim 1, characterized in that, The feeding pipe (7) has fixing holes (15) on both sides, and the two pressure plates (14) are respectively located in the corresponding fixing holes (15).

5. A steam turbine blade cleaning device for thermal power plants according to claim 1, characterized in that, A second sensor (16) is provided on one side of the conveyor (1) to detect the position of the fixed seat (2) and control the intermittent start and stop of the conveyor (1).

6. A steam turbine blade cleaning device for thermal power plants according to claim 1, characterized in that, The steam turbine blade cleaning device for thermal power plants also includes an extension tube (22), with two insert rods (23) at the bottom of the extension tube (22) and two protrusions (72) on the inner side of the discharge tube (7), with slots (73) on both protrusions (72).

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