A surface spraying device for processing steam turbine stationary blade

Abstract

The utility model discloses a kind of surface spraying devices for steam turbine static blade processing, it is related to steam turbine static blade processing technical field, including workbench and the snap ring being set at its top, the snap ring bottom and the workbench top between sliding connection, the snap ring inside is placed with spraying gun body, the snap ring front side is equipped with the fixed box of placing spraying gun tail, the workbench top rear side is fixedly connected with the sliding seat being set in parallel with it, the sliding seat is the rectangular structure of inside hollow, the sliding seat top is equipped with the sliding plate being set towards the snap ring, the sliding plate and the sliding seat between each other perpendicular. The utility model has the advantages of flexible adjustment, good static blade clamping effect, combines positioning, flexible clamping and automation control, solves the uneven clamping, easy damage, adjustment cumbersome, poor adaptability and other problems existing in traditional fixed plate and clamping plate clamping, improves the precision, efficiency and safety of spraying operation.

Description

Technical Field

[0001] This utility model relates to the field of turbine stationary blade processing technology, specifically a surface spraying device for turbine stationary blade processing. Background Technology

[0002] Steam turbine stator blades are subjected to high temperature, high pressure and high-speed airflow during operation, so their surface properties are subject to high requirements. In order to improve the heat resistance, wear resistance and corrosion resistance of the stator blades, surface treatment technology is usually used, among which surface spraying is a common and effective method.

[0003] Existing surface coating devices for turbine stationary blade processing can be referenced from Chinese Utility Model Patent Publication No. CN 222267540U, which discloses a coating spraying and covering fixture for turbine stationary blades. The fixture includes: a worktable; a support column fixedly connected to the upper surface of the worktable; a steering mechanism fixedly connected to the upper surface of the support column; a fixed box fixedly connected to the upper surface of the steering mechanism; a telescopic rod fixedly connected to the upper surface of the worktable; a retaining ring fixedly connected to the upper surface of the telescopic rod; a slide rail fixedly connected to the upper surface of the worktable; a slider slidably connected to the slide rail; and a support plate fixedly connected to the upper surface of the slider. Through the cooperation of the support column, steering mechanism, fixed box, telescopic rod, and retaining ring, the fixture helps the operator support the spray gun, ensuring stability during spraying. The operator can easily adjust the direction and height of the spray gun to achieve multi-angle spraying, improving work efficiency and saving time.

[0004] The above-mentioned device has a good effect, but there are still some defects in its actual use: the clamping effect of the fixed plate and the clamping plate on the stationary blade is not ideal, which may lead to uneven distribution of clamping force, which may not only damage the surface of the stationary blade, but also affect the quality of spraying. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a surface spraying device for processing turbine stationary blades. This device has the advantages of flexible adjustment and good clamping effect on stationary blades. It combines positioning, flexible clamping and automatic control, which solves the problems of uneven clamping, easy damage, cumbersome adjustment and poor adaptability in traditional fixed plate and clamping. This improves the accuracy, efficiency and safety of spraying operations.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a surface spraying device for processing turbine stationary blades, comprising a worktable and a retaining ring disposed on its top, wherein the bottom of the retaining ring is slidably connected to the top of the worktable, a spray gun body is placed inside the retaining ring, and a fixing box for placing the spray gun tail is provided on the front side of the retaining ring.

[0007] A slide block is fixedly connected to the rear top of the workbench, and the slide block is a hollow rectangular structure. The top of the slide block has a sliding plate facing the retaining ring. The sliding plate and the slide block are perpendicular to each other. The bottom of the sliding plate is slidably connected to the top of the slide block. A support plate is provided on the side of the sliding plate near the top of the retaining ring. The bottom of the support plate is slidably connected to the top of the sliding plate. The support plate moves from the rear side of the sliding plate to the retaining ring side. A groove is opened on the top of the side of the sliding plate near the retaining ring. A slider is fixedly connected to the bottom of the support plate. The slider is located inside the groove and slidably connected to it. A second telescopic rod is fixedly connected to the side of the sliding plate away from the top of the retaining ring. A controller for controlling the entire device is fixedly connected to the left end of the front surface of the workbench.

[0008] As a preferred embodiment of this utility model, the top of the slide block is provided with a movable groove arranged parallel to it, a movable block is slidably connected inside the slide block, a vertically arranged fixed rod is fixedly connected to the top of the movable block, the top of the fixed rod extends to the outside of the slide block and is fixedly connected to the bottom of the slide plate, the second telescopic rod is arranged parallel to the slide plate, and the telescopic end of the second telescopic rod is fixedly connected to the side of the support plate away from the retaining ring.

[0009] In a preferred embodiment of this invention, the surface of the fixed rod is slidably connected to the inner wall of the movable groove, a horizontally arranged threaded rod is rotatably connected to the inner center of the slide block, the threaded rod is threadedly connected to the inner center of the movable block, a first motor is fixedly connected to one side of the outer wall of the slide block, the output shaft of the first motor is fixedly connected to one end of the threaded rod, and a second motor is fixedly connected to the top of the support plate on the side away from the retaining ring.

[0010] As a preferred embodiment of this utility model, guide rods are fixedly connected to both the left and right sides of the inner wall of the slide block, and the guide rods are slidably connected to the moving block. The output shaft of the second motor extends to the front side of the slide plate and is fixedly connected to a rotating shaft. The rotating shaft is rotatably connected to the support plate, and a connecting rod is fixedly connected to the end of the rotating shaft away from the second motor.

[0011] In a preferred embodiment of this invention, an annular shell is fixedly connected to the end of the connecting rod away from the rotating shaft, and a horizontal tube is fixedly connected to the center of the annular shell near the retaining ring. The annular shell near the retaining ring has a stationary blade body with a central opening, and the horizontal tube is located at the central opening of the stationary blade body.

[0012] As a preferred embodiment of this utility model, an air bladder is provided at the center of the annular shell, and multiple abutment rods are fixedly connected in a circular array on the surface of the horizontal tube at the central opening of the stationary blade body. The multiple abutment rods are respectively attached to the inner wall of the stationary blade body at one end away from each other, and the multiple abutment rods are respectively extended into the interior of the horizontal tube and slidably connected thereto at one end. The multiple abutment rods move from the center of the horizontal tube to its circumference.

[0013] As a preferred embodiment of this utility model, the surface of the horizontal tube is fixedly connected with a plurality of sealing rings in a circumferential array, the inner wall of the sealing ring is slidably connected to the surface of the abutment rod, one end of the horizontal tube extends into the interior of the annular shell and is fixedly connected to one side of the airbag, and an air pump is fixedly connected to the upper part of the interior of the annular shell.

[0014] As a preferred embodiment of this utility model, the air pump's suction end is fixedly connected to a suction pipe, the end of the suction pipe away from the air pump extends to the outside of the annular shell and is fixedly connected thereto, the air pump's outlet end is fixedly connected to a delivery pipe, and the end of the delivery pipe away from the air pump is fixedly connected to the top of the airbag.

[0015] In a preferred embodiment of this utility model, a vertically arranged first telescopic rod is fixedly connected to the top of the workbench, the top telescopic end of the first telescopic rod is fixedly connected to the bottom of the retaining ring, a steering mechanism is provided at the bottom of the fixed box, a support column is fixedly connected to the top of the workbench, and the top of the support column is fixedly connected to the bottom of the steering mechanism.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model involves inserting the stationary blade body into the horizontal tube, aligning its center hole with the horizontal tube, and then starting the air pump through the air supply pipe to inject air into the airbag. As the air volume inside the airbag gradually increases, the gas enters the horizontal tube. As the gas volume inside the horizontal tube gradually increases, the gas pushes the abutment rod closer to the inner wall of the stationary blade body. Guided by the sealing ring, the abutment rod slides radially outward from the center of the horizontal tube until its outer end is evenly attached to the inner wall of the stationary blade body. Multiple abutment rods apply force simultaneously, forming a uniform circumferential clamping force to firmly fix the stationary blade body and avoid local stress concentration that could lead to blade deformation or damage.

[0018] 2. This utility model starts the first motor through the controller, drives its output shaft to drive the threaded rod to rotate. The threaded rod is threadedly connected to the moving block. Under the action of rotation, it pushes the moving block to move left and right along the axis. The guide rod restricts the rotation of the moving block to ensure that it only makes linear motion. The moving block drives the slide plate to move horizontally left and right on the slide block through the fixed rod. The slide plate drives the support plate, the second motor, the connecting rod, the annular shell and the clamped stationary blade to move left and right as a whole to adjust the spraying distance. The controller adjusts the extension length of the first telescopic rod. The first telescopic rod pushes the retaining ring to rise and fall, thereby adjusting the height of the spray gun body to ensure that the nozzle and the blade surface maintain the optimal spraying distance. The steering device, in conjunction with the support of the retaining ring, realizes the multi-angle tilting of the spray gun. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the slide structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the annular shell structure of this utility model.

[0022] In the diagram: 1. Workbench; 2. Support column; 3. Steering mechanism; 4. Fixing box; 5. First telescopic rod; 6. Snap ring; 7. Slide seat; 701. Moving groove; 702. Moving block; 703. Threaded rod; 704. Guide rod; 705. First motor; 706. Fixing rod; 8. Slide plate; 801. Slide groove; 9. Support plate; 901. Slider; 10. Rotating shaft; 11. Connecting rod; 12. Annular shell; 13. Second telescopic rod; 14. Second motor; 15. Horizontal tube; 16. Abutment rod; 17. Sealing ring; 18. Airbag; 19. Air supply pipe; 20. Air pump; 21. Air extraction pipe; 22. Controller; A. Stationary blade body. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0026] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0027] Example 1

[0028] Reference Figure 1-3 This is the first embodiment of the present invention, which provides a surface spraying device for processing turbine stationary blades, including a worktable 1 and a retaining ring 6 disposed on its top. The bottom of the retaining ring 6 is slidably connected to the top of the worktable 1. The body of a spray gun is placed inside the retaining ring 6, and a fixing box 4 for placing the tail of the spray gun is provided on the front side of the retaining ring 6.

[0029] Furthermore, a vertically arranged first telescopic rod 5 is fixedly connected to the top of the workbench 1, and the top telescopic end of the first telescopic rod 5 is fixedly connected to the bottom of the retaining ring 6. A steering mechanism 3 is provided at the bottom of the fixed box 4, and a support column 2 is fixedly connected to the top of the workbench 1, and the top of the support column 2 is fixedly connected to the bottom of the steering mechanism 3.

[0030] Furthermore, a slide block 7 is fixedly connected to the rear top of the workbench 1 and is arranged parallel to it. The slide block 7 is a hollow rectangular structure. The top of the slide block 7 is provided with a slide plate 8 facing the retaining ring 6. The slide plate 8 and the slide block 7 are perpendicular to each other. The bottom of the slide plate 8 is slidably connected to the top of the slide block 7. A support plate 9 is provided on the side of the slide plate 8 near the top of the retaining ring 6. The bottom of the support plate 9 is slidably connected to the top of the slide plate 8. The support plate 9 moves from the rear side of the slide plate 8 to the side of the retaining ring 6. A groove 801 is opened on the top side of the slide plate 8 near the retaining ring 6. A slider 901 is fixedly connected to the bottom of the support plate 9. The slider 901 is located inside the groove 801 and is slidably connected to it. A second telescopic rod 13 is fixedly connected to the side of the slide plate 8 away from the top of the retaining ring 6. A controller 22 for controlling the entire device is fixedly connected to the left end of the front surface of the workbench 1.

[0031] Specifically, the workbench 1 serves as the basic platform of the entire device, supporting all components. The retaining ring 6 is used to fix the spray gun body, ensuring its stability during the spraying process. The first telescopic rod 5 is vertically set on the top of the workbench 1 and connected to the bottom of the retaining ring 6, realizing the vertical adjustment of the retaining ring 6 to adapt to different spraying height requirements or different sizes of stationary blades. The fixing box 4 is used to place the tail part of the spray gun and, together with the retaining ring 6, realizes the overall clamping of the spray gun. The steering device 3 is installed on the top of the support column 2 and connected to the bottom of the fixing box 4, allowing the fixing box 4 to rotate in the horizontal plane to realize multi-angle spraying. The support column 2 provides vertical support and enhances structural rigidity. The slide 7 is a hollow rectangular structure and is fixed on the rear side of the workbench 1. The slide plate 8 is perpendicular to the top of the slide 7 and can slide on its top. The support plate 9 is installed on the top of the slide plate 8 and can slide back and forth on the slide plate 8 through the cooperation of the slider 901 and the slide groove 801. The second telescopic rod 13 is installed on the side of the slide plate 8 away from the retaining ring 6. The controller 22 is installed on the front side of the workbench 1, which can realize programmed control and improve the consistency and efficiency of spraying.

[0032] Furthermore, the position of the slide plate 8 is adjusted by the second telescopic rod 13, which in turn drives the support plate 9 to move back and forth, adjusting the relative distance between the blade and the spray gun. The height of the retaining ring 6 is adjusted by the first telescopic rod 5 to control the nozzle height of the spray gun. The angle of the fixed box 4 is adjusted by the steering gear 3, thereby changing the spray direction of the spray gun and realizing multi-angle spraying. The automated spraying operation is completed under the control of the controller 22.

[0033] Example 2

[0034] In the second embodiment of this utility model, a movable groove 701 parallel to the top of the slide block 7 is provided, a movable block 702 is slidably connected inside the slide block 7, a vertically arranged fixed rod 706 is fixedly connected to the top of the movable block 702, the top of the fixed rod 706 extends to the outside of the slide block 7 and is fixedly connected to the bottom of the slide plate 8, the second telescopic rod 13 is arranged parallel to the slide plate 8, and the telescopic end of the second telescopic rod 13 is fixedly connected to the side of the support plate 9 away from the retaining ring 6.

[0035] Furthermore, the surface of the fixed rod 706 is slidably connected to the inner wall of the moving groove 701, and a horizontally arranged threaded rod 703 is rotatably connected to the inner center of the slide block 7. The threaded rod 703 is threadedly connected to the inner center of the moving block 702. A first motor 705 is fixedly connected to one side of the outer wall of the slide block 7. The output shaft of the first motor 705 is fixedly connected to one end of the threaded rod 703. A second motor 14 is fixedly connected to the top of the support plate 9 on the side away from the retaining ring 6.

[0036] Furthermore, guide rods 704 are fixedly connected to both sides of the inner wall of the slide block 7. The guide rods 704 are slidably connected to the moving block 702. The output shaft of the second motor 14 extends to the front side of the slide plate 8 and is fixedly connected to a rotating shaft 10. The rotating shaft 10 is rotatably connected to the support plate 9. A connecting rod 11 is fixedly connected to the end of the rotating shaft 10 away from the second motor 14.

[0037] Furthermore, during use, the first motor 705 is started by the controller 22. The first motor 705 can drive the threaded rod 703 to rotate. When the threaded rod 703 rotates, it drives the moving block 702, which is threaded to it, to move along its surface. Due to the guiding effect of the guide rod 704, the moving block 702 can only move left and right along the surface of the threaded rod 703. When the moving block 702 moves left and right, it drives the slide plate 8 and other components on its top to move horizontally along the surface of the worktable 1 through the fixed rod 706. By moving the support plate 9 back and forth, the distance between the spray gun nozzle and the surface of the stationary blade can be precisely adjusted. The slide plate 8 can make uniform reciprocating motion. With the start and stop of the spray gun, automatic scanning and spraying of the stationary blade can be realized, avoiding uneven coating caused by manual hand tremors.

[0038] Example 3

[0039] In the third embodiment of this utility model, an annular shell 12 is fixedly connected to the end of the connecting rod 11 away from the rotating shaft 10. A horizontal tube 15 is fixedly connected to the center of the annular shell 12 near the retaining ring 6. The annular shell 12 near the retaining ring 6 has a stationary blade body A with a central opening. The horizontal tube 15 is located at the central opening of the stationary blade body A.

[0040] Furthermore, an airbag 18 is provided at the center of the annular shell 12, and multiple abutment rods 16 are fixedly connected in a circular array on the surface of the horizontal tube 15 at the central opening of the stationary blade body A. The multiple abutment rods 16 are respectively separated by one end and attached to the inner wall of the stationary blade body A, and the multiple abutment rods 16 are respectively close to one end and extend into the interior of the horizontal tube 15 and are slidably connected thereto. The multiple abutment rods 16 move from the center of the horizontal tube 15 to its circumference.

[0041] Furthermore, multiple sealing rings 17 are fixedly connected in a circumferential array on the surface of the horizontal tube 15. The inner wall of the sealing ring 17 is slidably connected to the surface of the abutment rod 16. One end of the horizontal tube 15 extends into the interior of the annular shell 12 and is fixedly connected to one side of the airbag 18. An air pump 20 is fixedly connected to the upper part of the interior of the annular shell 12.

[0042] Furthermore, the air pump 20 has an air extraction pipe 21 fixedly connected to its air extraction end. The end of the air extraction pipe 21 away from the air pump 20 extends to the outside of the annular shell 12 and is fixedly connected thereto. The air pump 20 has an air supply pipe 19 fixedly connected to its air outlet end. The end of the air supply pipe 19 away from the air pump 20 is fixedly connected to the top of the airbag 18.

[0043] Specifically, the stationary blade body A is inserted into the horizontal tube 15, aligning its center hole with the horizontal tube 15. The controller 22 starts the air pump 20, injecting air into the air bag 18 through the air supply pipe 19. As the air volume inside the air bag 18 gradually increases, the gas enters the horizontal tube 15. As the gas volume inside the horizontal tube 15 gradually increases, the gas pushes the abutment rod 16 closer to the inner wall of the stationary blade body A. The abutment rod 16 is guided by the sealing ring 17 and slides radially outward from the center of the horizontal tube 15 until its outer end is evenly attached to the inner wall of the stationary blade body A. Multiple abutment rods 16 apply force simultaneously, forming a uniform circumferential clamping force, which firmly fixes the stationary blade body A, avoiding local stress concentration that could cause blade deformation or damage.

[0044] Working principle:

[0045] The operator aligns the center through hole of the stationary blade body A to be sprayed and inserts it into the horizontal tube 15, ensuring that its axis is aligned with the horizontal tube 15 to complete the initial positioning. The controller 22 starts the air pump 20 and injects air into the air bag 18 through the air supply pipe 19. As the air volume inside the air bag 18 gradually increases, the gas enters the horizontal tube 15. As the gas volume inside the horizontal tube 15 gradually increases, the gas pushes the abutment rod 16 to gradually approach the inner wall of the stationary blade body A. The abutment rod 16 is guided by the sealing ring 17 and slides radially outward from the center of the horizontal tube 15 until its outer end is evenly attached to the inner wall of the stationary blade body A. Multiple abutment rods 16 apply force at the same time to form a uniform circumferential clamping force, which firmly fixes the stationary blade body A and avoids local stress concentration that may cause blade deformation or damage.

[0046] The controller 22 starts the first motor 705, driving its output shaft to rotate the threaded rod 703. The threaded rod 703 is threadedly connected to the moving block 702. Under the action of rotation, it pushes the moving block 702 to move left and right along the axis. The guide rod 704 restricts the rotation of the moving block 702 to ensure that it only makes linear motion. The moving block 702 drives the slide plate 8 to move horizontally left and right on the slide block 7 through the fixed rod 706. The slide plate 8 drives the support plate 9, the second motor 14, the connecting rod 11, the annular shell 12 and the clamped stationary blade A to move left and right as a whole. The controller 22 adjusts the extension length of the first telescopic rod 5, which pushes the retaining ring 6 to rise and fall, thereby adjusting the height of the spray gun body to ensure that the nozzle and the blade surface maintain the optimal spraying distance. The steering device 3, in conjunction with the support of the retaining ring 6, enables the spray gun to tilt at multiple angles to adapt to the complex curved surface of the blade. When the controller 22 is activated, the second motor 14 can be started, driving the rotating shaft 10 to rotate, which in turn drives the connecting rod 11 and the annular shell 12 to rotate slowly, so that the stationary blade body A rotates around its central axis to achieve continuous circumferential spraying.

[0047] In summary: By using the airbag 18 to drive the 16 abutment rod and the sealing ring 17, the force on the inner wall of the stationary blade body A is ensured to be uniform, avoiding local stress concentration that could lead to deformation or damage. The horizontal tube 15 is inserted into the center hole of the stationary blade body A to achieve precise axis alignment, which improves the spraying accuracy. It also has the ability to adjust the height, move forward and backward, and slide left and right, which greatly improves the spraying coverage and flexibility.

[0048] The surface spraying device for processing turbine stationary blades used in this application can be additionally equipped with protective measures known in the art under different operating environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, which are commonly used by those skilled in the art.

[0049] It should be noted that (motor, screw, electric telescopic rod) are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0050] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0051] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0052] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A surface spraying device for processing turbine stationary blades, comprising a worktable (1) and a retaining ring (6) disposed on its top, wherein the bottom of the retaining ring (6) is slidably connected to the top of the worktable (1), a spray gun body is placed inside the retaining ring (6), and a fixing box (4) for placing the spray gun tail is provided on the front side of the retaining ring (6), characterized in that: The workbench (1) is fixedly connected to the rear top of a slide block (7) arranged parallel to it. The slide block (7) is a hollow rectangular structure. The top of the slide block (7) is provided with a sliding plate (8) facing the retaining ring (6). The sliding plate (8) and the slide block (7) are perpendicular to each other. The bottom of the sliding plate (8) is slidably connected to the top of the slide block (7). A support plate (9) is provided on the side of the sliding plate (8) near the top of the retaining ring (6). The bottom of the support plate (9) is slidably connected to the top of the sliding plate (8). The moving path of the plate (9) is from the rear side of the slide plate (8) to the side of the retaining ring (6). The top of the slide plate (8) near the retaining ring (6) has a groove (801). The bottom of the support plate (9) is fixedly connected to a slider (901). The slider (901) is located inside the groove (801) and is slidably connected to it. The top side of the slide plate (8) away from the retaining ring (6) is fixedly connected to a second telescopic rod (13). The left end of the front surface of the workbench (1) is fixedly connected to a controller (22) that controls the entire device.

2. A surface spraying device for machining of a steam turbine vane according to claim 1, characterized in that: The top of the slide (7) is provided with a moving groove (701) parallel to it. A moving block (702) is slidably connected inside the slide (7). A vertically arranged fixing rod (706) is fixedly connected to the top of the moving block (702). The top of the fixing rod (706) extends to the outside of the slide (7) and is fixedly connected to the bottom of the slide plate (8). The second telescopic rod (13) is arranged parallel to the slide plate (8). The telescopic end of the second telescopic rod (13) is fixedly connected to the side of the support plate (9) away from the retaining ring (6).

3. A surface spraying device for machining of a steam turbine vane according to claim 2, characterized in that: The surface of the fixed rod (706) is slidably connected to the inner wall of the moving groove (701). A horizontally arranged threaded rod (703) is rotatably connected to the center of the slide block (7). The threaded rod (703) is threadedly connected to the center of the moving block (702). A first motor (705) is fixedly connected to one side of the outer wall of the slide block (7). The output shaft of the first motor (705) is fixedly connected to one end of the threaded rod (703). A second motor (14) is fixedly connected to the top of the support plate (9) on the side away from the retaining ring (6).

4. A surface spraying device for machining of a stationary blade of a steam turbine according to claim 3, characterized in that: Guide rods (704) are fixedly connected to both sides of the inner wall of the slide (7). The guide rods (704) are slidably connected to the moving block (702). The output shaft of the second motor (14) extends to the front side of the slide plate (8) and is fixedly connected to a rotating shaft (10). The rotating shaft (10) is rotatably connected to the support plate (9). A connecting rod (11) is fixedly connected to the end of the rotating shaft (10) away from the second motor (14).

5. A surface spraying device for machining of a turbine vane according to claim 4, characterized in that: The connecting rod (11) is fixedly connected to an annular shell (12) at the end away from the rotating shaft (10). A horizontal tube (15) is fixedly connected to the center of the annular shell (12) near the retaining ring (6). The annular shell (12) near the retaining ring (6) has a stationary blade body (A) with a central opening. The horizontal tube (15) is located at the central opening of the stationary blade body (A).

6. A surface spraying device for machining of a turbine vane according to claim 5, characterized in that: An air bladder (18) is provided at the center of the annular shell (12). The surface of the horizontal tube (15) located at the central opening of the stationary blade body (A) is fixedly connected with a plurality of abutment rods (16) in a circumferential array. The abutment rods (16) are positioned such that one end is far away from the other and fits against the inner wall of the stationary blade body (A). The abutment rods (16) extend into the horizontal tube (15) and slide therewith at one end. The moving path of the abutment rods (16) is from the center of the horizontal tube (15) to its circumference.

7. A surface spraying device for machining of a steam turbine vane according to claim 6, characterized in that: The surface of the horizontal tube (15) is fixedly connected with a plurality of sealing rings (17) in a circumferential array. The inner wall of the sealing ring (17) is slidably connected to the surface of the abutment rod (16). One end of the horizontal tube (15) extends into the interior of the annular shell (12) and is fixedly connected to one side of the airbag (18). An air pump (20) is fixedly connected to the upper part of the interior of the annular shell (12).

8. A surface spraying device for machining of a steam turbine vane according to claim 7, characterized in that: The air pump (20) has a fixed suction pipe (21) at its suction end. The suction pipe (21) extends away from the air pump (20) to the outside of the annular shell (12) and is fixedly connected thereto. The air pump (20) has a fixed air supply pipe (19) at its outlet end. The air supply pipe (19) is fixedly connected away from the air pump (20) to the top of the airbag (18).

9. The surface spraying device for machining a turbine vane according to claim 1, characterized in that: The top of the workbench (1) is fixedly connected to a vertically arranged first telescopic rod (5), the top telescopic end of the first telescopic rod (5) is fixedly connected to the bottom of the retaining ring (6), the bottom of the fixed box (4) is provided with a steering device (3), the top of the workbench (1) is fixedly connected to a support column (2), the top of the support column (2) is fixedly connected to the bottom of the steering device (3).

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