Positioning and guiding device for machining of steam turbine low-pressure diaphragm sleeve gas guide inclined hole

Abstract

This invention belongs to the technical field of drill bit positioning equipment, specifically a positioning and guiding device for machining the inclined holes of the air guide on the low-pressure diaphragm sleeve of a steam turbine. It includes a mounting base for placing a universal drill and an automatic calibration machining mechanism mounted on the mounting base. By setting up the automatic calibration machining mechanism, during actual machining operations, only the position of the guide rail and the angle of the adjustment components need to be adjusted before machining. In subsequent machining processes, the drive motor provides driving force, and with the cooperation of the transmission and switching components, the automatic machining of multiple inclined holes on the low-pressure diaphragm sleeve of the steam turbine is achieved. Compared to the manual drilling method in related technologies, this significantly reduces the degree of manual intervention and the labor intensity of workers. Furthermore, during the universal drill's movement, its stroke is guided and controlled by the guide rail and the drilling rail, further reducing the probability of misoperation and accidents compared to manual operation.

Description

Technical Field

[0001] This invention belongs to the technical field of drill bit positioning equipment, specifically a positioning and guiding device for machining the inclined hole of the air guide in a low-pressure diaphragm sleeve of a steam turbine. Background Technology

[0002] The oblique air guide holes of the low-pressure diaphragm sleeve of the steam turbine are a key structure to ensure the reasonable distribution of airflow in the low-pressure section of the steam turbine and reduce interstage steam leakage loss. The machining accuracy of the holes directly affects the sealing performance of the diaphragm sleeve and the operating efficiency of the unit.

[0003] Because the axis of the inclined hole forms a specific angle with the body of the partition sleeve, and it needs to be precisely aligned with the airflow channel of the adjacent component, the angle clamping device of the universal milling head attachment will be in a fixed angle for a long time due to the long-term machining of the inclined hole. Therefore, during frequent operation, the angle clamping device of the universal milling head attachment will wear out significantly, resulting in a reduced clamping and fixing effect. As a result, the inclined hole is often drilled into a waist-shaped hole or the drill bit is broken. When using a universal drilling machine for drilling operations, the inclined hole angle is easily offset and the hole diameter is out of tolerance due to positioning deviation, which in turn causes problems such as airflow turbulence and increased energy consumption.

[0004] To address the aforementioned issues, a solution entitled "Positioning and Guiding Device for Machining Air Guide Angle Holes in Low-Pressure Diaphragm Sleeves of Steam Turbines" (application number CN2014101682455) was previously disclosed. This solution utilizes a guide component mounted on the boss of the low-pressure diaphragm sleeve to provide positioning and guidance for the universal drill during drilling, ensuring that the universal drill's feed direction and position conform to the preset parameters. However, in practical application, it was found that due to the large number of air guide angle holes on the diaphragm sleeve, workers need to manually move the guide component and the universal drill to calibrate the drilling position one by one. Since both the guide component and the universal drill have a certain weight, multi-position drilling operations not only increase the labor intensity for workers but also, because drilling and calibration operations need to be performed sequentially, result in a long overall drilling time.

[0005] In view of this, the present invention proposes a positioning and guiding device for machining the oblique holes of the air guide in the low-pressure diaphragm sleeve of a steam turbine, in order to solve the above-mentioned technical problems. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a positioning and guiding device for machining the oblique holes of the air guide in a steam turbine low-pressure diaphragm sleeve.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the turbine low-pressure diaphragm sleeve air guide inclined hole machining positioning guide device of the present invention includes a mounting base for placing a universal drill and an automatic calibration machining mechanism assembled on the mounting base, wherein the automatic calibration machining mechanism is used to guide the movement path of the universal drill;

[0008] The automatic calibration processing mechanism includes a guide rail, a drilling rail, traveling wheels, a drive motor, and positioning components;

[0009] The guide rail is detachably mounted on the low-pressure partition sleeve, and the mounting base is slidably mounted on the guide rail;

[0010] The mounting base is provided with an adjustment groove, the drilling rail is installed in the adjustment groove through an adjustment component, and the universal drill is installed on the drilling rail;

[0011] The mounting base is equipped with a traveling wheel and a drive motor. The traveling wheel is driven by friction with the guide rail. The drive motor is connected to the traveling wheel and the drilling rail through a transmission assembly.

[0012] The positioning component is detachably fixed on the guide rail by bolts. The mounting base is equipped with a switching component, which works with the transmission component to adjust the alternating transmission connection between the drive motor and the traveling wheel and the drilling rail.

[0013] Preferably, the adjusting assembly includes a rotating shaft and a fixing pin;

[0014] The rotating shaft is rotatably installed in the adjusting groove, the guide rail is fixedly installed on the rotating shaft, the mounting base is threaded with a fixing pin, and the rotating shaft has evenly distributed slots in the circumferential direction. In the initial state, the fixing pin extends into the slot.

[0015] Preferably, the guide rail is a flexible and deformable rail, which consists of a belt, rigid teeth, and a joint plate;

[0016] The number of belts is two, and both ends of the belts are mounted on the joint plate. The two belts are arranged parallel to each other vertically.

[0017] The belts are fixedly installed with uniformly distributed rigid teeth on their adjacent sides, and the rigid teeth are all L-shaped structures.

[0018] Preferably, a reinforcing cavity is provided on one side of the joint plate, and an inclined abutment is elastically installed in the reinforcing cavity by a spring. The abutment is used to limit the rigid tooth in one direction.

[0019] Preferably, the drilling rail consists of a track plate, a hydraulic telescopic rod, and a slide block;

[0020] The track plate is fixedly installed on the adjustment assembly, the hydraulic telescopic rod is fixedly installed on the track plate, the slide block is slidably installed on the track plate, the universal drill is fixedly installed on the slide block, and the output end of the hydraulic telescopic rod is connected to the slide block.

[0021] Preferably, the output end of the hydraulic telescopic rod is elastically connected to the slide block via a spring plate.

[0022] Preferably, the transmission assembly is used to drive the motor to the traveling wheel and the drilling rail, and the transmission assembly includes a driving wheel, a driven wheel, a docking wheel, a hydraulic cylinder, a reciprocating screw and a piston plate;

[0023] The driving wheel is fixedly installed at the output end of the drive motor, the driven wheel is connected to the walking wheel, the hydraulic cylinder is fixedly installed inside the mounting base, a reciprocating screw is rotatably installed inside the hydraulic cylinder, a piston plate is slidably installed inside the hydraulic cylinder, the piston plate and the reciprocating screw are helically driven, and a docking wheel is fixedly installed at one end of the reciprocating screw outside the hydraulic cylinder.

[0024] Preferably, the switching component includes a sliding column;

[0025] The mounting base has a switching groove, the sliding column is slidably installed in the switching groove, the positioning member has inclined surfaces on both sides, the positioning member is located on the movement path of the sliding column, the sliding column is fixedly connected to the drive motor, the driving wheel is located between the driven wheel and the docking wheel, and in the initial state the driving wheel is engaged with the driven wheel and disengaged from the docking wheel.

[0026] Preferably, the switching assembly further includes an inflatable bladder and a lifting rod;

[0027] An air bladder is fixedly installed in the oilless chamber of the hydraulic cylinder. The air bladder is located on the movement path of the piston plate. A lifting rod is fixedly installed on the central shaft of the traveling wheel. The lifting rod is a pneumatic telescopic rod. The driven wheel is fixedly installed on the lifting rod. The lifting rod and the air bladder are connected unidirectionally through a pipe. A one-way air inlet pipe is fixedly installed on the air bladder. A one-way air outlet pipe is fixedly installed on the lifting rod.

[0028] Preferably, when the piston plate is reset, the air injection efficiency of the airbag into the lifting rod is greater than the air outlet efficiency of the one-way air outlet pipe.

[0029] The beneficial effects of this invention are as follows:

[0030] 1. The turbine low-pressure diaphragm sleeve air guide hole machining positioning and guiding device of the present invention, by setting an automatic calibration machining mechanism, only requires adjustment of the guide rail position and adjustment component angle before machining. In the subsequent machining process, the drive motor provides driving force, and with the cooperation of the transmission component and the switching component, the multiple air guide holes on the turbine low-pressure diaphragm sleeve are automatically machined. Compared with the setting of manually opening holes one by one in related technologies, it not only greatly reduces the degree of manual intervention and the labor intensity of workers, but also reduces the probability of misoperation and accidents compared with manual operation, thus ensuring the quality of opening the air guide holes.

[0031] 2. The turbine low-pressure diaphragm sleeve air guide hole machining positioning and guiding device of the present invention, by setting transmission components and switching components, during the continuous rotation of the drive motor, uses a positioning component with manually set orientation to automatically switch the movement path of the universal drill during the circumferential rotation of the mounting base, so as to realize the automatic machining of the air guide hole. In the whole operation process, the automation level of air guide hole machining is effectively improved and the labor intensity of workers is reduced. Attached Figure Description

[0032] The invention will now be further described with reference to the accompanying drawings.

[0033] Figure 1 This is a perspective view of the invention installed on a low-pressure partition sleeve;

[0034] Figure 2 This is a three-dimensional view of the guide rail in this invention;

[0035] Figure 3 This is an assembly perspective view of the connector plate and the abutment plate in this invention;

[0036] Figure 4 This is a perspective view of the mounting base in this invention;

[0037] Figure 5 This is a perspective view of the mounting base from another angle of the present invention;

[0038] Figure 6 This is a diagram showing the internal structure of the mounting base in this invention;

[0039] Figure 7 This is a cross-sectional view of the hydraulic cylinder in this invention;

[0040] In the diagram: 1. Mounting base; 11. Traveling wheel; 12. Drive motor; 2. Belt; 21. Rigid gear; 22. Connector plate; 23. Reinforced cavity; 25. Support plate; 3. Track plate; 31. Hydraulic telescopic rod; 32. Slide seat; 33. Spring plate; 4. Adjustment groove; 41. Rotating shaft; 42. Fixing pin; 43. Slot; 5. Drive wheel; 51. Driven wheel; 52. Connecting wheel; 53. Hydraulic cylinder; 54. Reciprocating screw; 55. Piston plate; 6. Sliding column; 61. Switching groove; 62. Inflatable bladder; 63. Lifting rod; 64. One-way air inlet pipe; 65. One-way air outlet pipe; 7. Positioning component. Detailed Implementation

[0041] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0042] like Figures 1 to 7 As shown, the turbine low-pressure diaphragm sleeve air guide hole machining positioning and guiding device of the present invention includes a mounting base 1 for placing a universal drill and an automatic calibration machining mechanism assembled on the mounting base 1. The automatic calibration machining mechanism is used to guide the movement path of the universal drill.

[0043] The automatic calibration processing mechanism includes a guide rail, a drilling rail, a traveling wheel 11, a drive motor 12, and a positioning component 7;

[0044] The guide rail is detachably mounted on the low-pressure partition sleeve, and the mounting base 1 is slidably mounted on the guide rail;

[0045] The mounting base 1 is provided with an adjustment groove 4, the drilling rail is installed in the adjustment groove 4 through an adjustment component, and the universal drill is installed on the drilling rail.

[0046] The mounting base 1 is equipped with a traveling wheel 11 and a drive motor 12. The traveling wheel 11 is driven by friction with the guide rail. The drive motor 12 is connected to the traveling wheel 11 and the drilling rail through a transmission assembly.

[0047] The positioning component 7 is detachably fixed on the guide rail by bolts. The mounting base 1 is equipped with a switching component. The switching component, in conjunction with the transmission component, adjusts the drive motor 12 to alternately drive the traveling wheel 11 and the drilling rail.

[0048] The adjustment assembly includes a rotating shaft 41 and a fixing pin 42;

[0049] The rotating shaft 41 is rotatably installed in the adjusting groove 4, the guide rail is fixedly installed on the rotating shaft 41, the mounting base 1 is threaded with a fixing pin 42, and the rotating shaft 41 has evenly distributed slots 43 in the circumferential direction. In the initial state, the fixing pin 42 extends into the slot 43.

[0050] In order to minimize the machining difficulty and improve the machining accuracy of the air guide inclined hole on the low-pressure diaphragm sleeve of the steam turbine, an automatic calibration machining mechanism is set in this invention when machining and positioning the air guide inclined hole. The automatic calibration machining mechanism controls the movement path of the universal drill, thereby realizing the automated machining of the air guide inclined hole and effectively improving the machining efficiency of the air guide inclined hole on the low-pressure diaphragm sleeve of the steam turbine.

[0051] Specifically, during the pre-processing preparation, the workers first install the mounting base 1 and the matching guide rail on the turbine low-pressure diaphragm sleeve. Then, they start the adjustment component. When the adjustment component is in operation, the fixing pin 42 is first turned, causing the fixing pin 42 to separate from the slot 43 on the rotating shaft 41. Then, the rotating shaft 41 is manually rotated, causing the angle of the drilling rail to change. It should be noted that there are angle scales engraved on the inner wall of the adjustment groove 4 to facilitate the adjustment of the drilling rail angle. After the angle is adjusted, the fixing pin 42 is turned again to fix the rotating shaft 41. After the adjustment is completed, the universal drill is installed on the drilling rail, and the drive motor 12 and the universal drill are started. Then, under the action of the transmission component, the universal drill is driven to rotate in a circle on the guide rail. With the cooperation of the switching component and the positioning component 7, the universal drill is driven to perform radial linear motion on the drilling rail, thereby realizing the processing of multiple air guide inclined holes on the turbine low-pressure diaphragm sleeve.

[0052] This invention, by setting up an automatic calibration processing mechanism, only requires adjusting the position of the guide rail and the angle of the adjustment component before actual processing. In the subsequent processing, the drive motor 12 provides driving force, and with the cooperation of the transmission component and the switching component, the multiple air guide inclined holes on the low-pressure diaphragm sleeve of the steam turbine are automatically processed. Compared with the manual hole-opening setting in related technologies, this not only greatly reduces the degree of manual intervention and the labor intensity of the workers, but also, during the universal drill's movement, its stroke is guided and controlled by the guide rail and the drilling rail, which further reduces the probability of misoperation and accidents compared with manual operation, thereby ensuring the quality of the air guide inclined holes.

[0053] In a preferred embodiment of the present invention, the guide rail is a flexible and deformable track, and the guide rail is composed of a belt 2, rigid teeth 21 and a joint plate 22;

[0054] There are two belts 2, and both ends of the belts 2 are installed on the connector plate 22. The two belts 2 are arranged parallel to each other vertically.

[0055] The belts 2 are fixedly installed with uniformly distributed rigid teeth 21 on their respective sides, and the rigid teeth 21 are all L-shaped structures.

[0056] A reinforcing cavity 23 is provided on one side of the connector plate 22. An inclined abutment 25 is elastically installed in the reinforcing cavity 23 by means of a spring. The abutment 25 is used to limit the rigid tooth 21 in one direction.

[0057] To broaden the adaptability of the positioning and guiding device for use on partition sleeves of different diameters, the guide rail in this invention consists of a belt 2, rigid teeth 21, and a connector plate 22. The belt 2 is a flexible belt reinforced with steel wire rope. The rigid teeth 21 are engaged and fixedly installed on the belt 2. The two ends of the belt 2 are connected by the connector plate 22 to form a ring structure. There are at least two belts 2. When fitting the partition sleeve, the abutment plate 25 is manually pried open to loosen the belt 2, which is then fitted onto the partition sleeve. After releasing the abutment plate 25, the belt 2 is pulled with the aid of a tool to achieve the desired fit. The belt 2 is tightened, and the abutment 25, under the elastic support of the spring, engages in the gap of the rigid tooth 21, realizing the one-way limiting of the rigid tooth 21 until the belt 2 is completely attached to the partition sleeve. It should be noted that in this invention, the upper and lower ends of the mounting seat 1 are cylindrical, and the upper and lower ends of the mounting seat 1 are inserted into the gap between the rigid tooth 21 and the partition sleeve. The left and right ends of the mounting seat 1 are spring telescopic rods. When the mounting seat 1 slides around the guide rail, the spring telescopic rods on the left and right sides support the main body of the mounting seat 1, so that the mounting seat 1 can slide around the guide rail.

[0058] In a preferred embodiment of the present invention, the drilling rail is composed of a track plate 3, a hydraulic telescopic rod 31, and a sliding block 32;

[0059] The track plate 3 is fixedly installed on the adjustment assembly, the hydraulic telescopic rod 31 is fixedly installed on the track plate 3, the slide block 32 is slidably installed on the track plate 3, the universal drill is fixedly installed on the slide block 32, and the output end of the hydraulic telescopic rod 31 is connected to the slide block 32.

[0060] The output end of the hydraulic telescopic rod 31 is elastically connected to the slide block 32 via a spring plate 33.

[0061] The transmission assembly is used to drive the motor 12 to the traveling wheel 11 and the drilling rail. The transmission assembly includes a driving wheel 5, a driven wheel 51, a docking wheel 52, a hydraulic cylinder 53, a reciprocating screw 54 and a piston plate 55.

[0062] The driving wheel 5 is fixedly installed at the output end of the drive motor 12. The driven wheel 51 is connected to the walking wheel 11. The hydraulic cylinder 53 is fixedly installed inside the mounting base 1. A reciprocating screw 54 is rotatably installed inside the hydraulic cylinder 53. A piston plate 55 is slidably installed inside the hydraulic cylinder 53. The piston plate 55 and the reciprocating screw 54 are helically driven. A docking wheel 52 is fixedly installed at one end of the reciprocating screw 54 outside the hydraulic cylinder 53.

[0063] In practical applications, after the adjustment components are adjusted, the drive motor 12 is started, driving the drive wheel 5 to rotate. Initially, the drive wheel 5 meshes with the driven wheel 51, thus the driven wheel 51 drives the traveling wheel 11 to rotate. The traveling wheel 11, through friction with the guide rail, causes the mounting base 1 to slide circumferentially along the guide rail. When the mounting base 1 aligns with the positioning plate during its sliding process, under the action of the switching components, the drive wheel 5 meshes with the docking wheel 52. Through the rotation of the docking wheel 52 and the reciprocating screw 54, and the helical transmission between the reciprocating screw 54 and the piston plate 55, the piston plate 55 is caused to perform periodic linear reciprocating motion within the hydraulic cylinder 53. When the oil-containing chamber in the hydraulic cylinder 53 is squeezed, the hydraulic oil in the hydraulic cylinder 53 is transported to the hydraulic cylinder through the pipeline. In the telescopic rod 31, the hydraulic telescopic rod 31 is forced to extend. The hydraulic telescopic rod 31 pushes the slide 32 and the universal drill on the slide 32 to move through the spring plate 33. Under the guidance of the track plate 3, the universal drill moves towards the partition sleeve, thereby realizing the drilling of the partition sleeve. Similarly, when the piston plate 55 moves away from the oil-containing cavity in the hydraulic cylinder 53, the hydraulic telescopic rod 31 retracts, pulls the slide 32 through the spring plate 33, and then pulls the universal drill to reset. During the drilling and reset process of the universal drill, the air guide oblique hole is opened on the partition sleeve. When the hydraulic telescopic rod 31 resets, under the action of the switching component, the driving wheel 5 meshes with the driven wheel 51 again, thereby driving the mounting seat 1 to slide in the circumferential direction along the guide rail until it docks with the next positioning part 7.

[0064] In a preferred embodiment of the present invention, the switching component includes a sliding column 6;

[0065] The mounting base 1 has a switching groove 61, the sliding column 6 is slidably installed in the switching groove 61, the positioning member 7 has inclined surfaces on both sides, the positioning member 7 is located on the movement path of the sliding column 6, the sliding column 6 is fixedly connected to the drive motor 12, the driving wheel 5 is located between the driven wheel 51 and the docking wheel 52, and in the initial state the driving wheel 5 is engaged with the driven wheel 51 and separated from the docking wheel 52.

[0066] The switching assembly also includes an inflatable bladder 62 and a lifting rod 63;

[0067] The hydraulic cylinder 53 has an oil-free chamber with an inflatable bladder 62 fixedly installed. The inflatable bladder 62 is located on the movement path of the piston plate 55. A lifting rod 63 is fixedly installed on the central shaft of the traveling wheel 11. The lifting rod 63 is a pneumatic telescopic rod. The driven wheel 51 is fixedly installed on the lifting rod 63. The lifting rod 63 and the inflatable bladder 62 are connected unidirectionally through a pipe. A one-way air inlet pipe 64 is fixedly installed on the inflatable bladder 62. A one-way air outlet pipe 65 is fixedly installed on the lifting rod 63.

[0068] When the piston plate 55 is reset, the air injection efficiency of the airbag 62 into the lifting rod 63 is greater than the air outlet efficiency of the one-way air outlet pipe 65.

[0069] Mounting base 1 slides circumferentially along the guide rail. As the sliding column 6 on mounting base 1 gradually contacts the positioning element 7, the inclined surfaces on both sides of the positioning element 7 cause the sliding column 6 to move gradually. This movement of the sliding column 6 drives the drive motor 12, causing the driving wheel 5 to gradually disengage from the driven wheel 51 and engage with the docking wheel 52. Finally, the rotation of the docking wheel 52 drives the universal drill to move along the drilling rail. During this process, the air bladder 62 gradually loses the pressure of the piston plate 55. Under its own elasticity, the air bladder 62 draws in outside air through the one-way air intake pipe 64. As the docking wheel 52 continues to rotate, during the reverse reset process of the piston plate 55, the piston plate 55 again squeezes the air bladder 62. The air bladder 62 injects air into the lifting rod 63 through the pipe, causing the lifting rod 63 to push the driven wheel 51 to move until the driven wheel 51 engages with the driving wheel 5. It should be noted that at this time, the driving wheel 5, the driven wheel 51, and the docking wheel 52 are all engaged. The mounting base 1 slides along the guide rail, and the hydraulic telescopic rod 31 continues to retract. When the sliding column 6 on the mounting base 1 separates from the positioning component 7 during the movement, the drive motor 12 resets under the action of gravity, and the docking wheel 52 and the piston plate 55 stop moving. As the air in the lifting rod 63 is continuously released along the one-way air outlet pipe 65, the air pressure in the lifting rod 63 gradually decreases, causing the lifting rod 63 to reset with the driven wheel 51, so as to facilitate switching at the next positioning component 7.

[0070] This invention, by setting up a transmission component and a switching component, utilizes a positioning component 7 with manually set orientation during the continuous rotation of the drive motor 12 to automatically switch the movement path of the universal drill during the circumferential rotation of the mounting base 1, thereby achieving automatic processing of the air guide inclined hole. In the entire operation process, this effectively improves the automation level of the air guide inclined hole processing and reduces the labor intensity of the workers.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning and guiding device for machining the oblique holes of the air guide in a steam turbine low-pressure diaphragm sleeve, characterized in that: It includes a mounting base (1) for placing a universal drill and an automatic calibration machining mechanism mounted on the mounting base (1), the automatic calibration machining mechanism being used to guide the movement path of the universal drill; The automatic calibration processing mechanism includes a guide rail, a drilling rail, a traveling wheel (11), a drive motor (12), and a positioning component (7). The guide rail is detachably mounted on the low-pressure partition sleeve, and the mounting base (1) is slidably mounted on the guide rail; The mounting base (1) is provided with an adjustment groove (4), the drilling rail is installed in the adjustment groove (4) through an adjustment component, and the universal drill is installed on the drilling rail; The mounting base (1) is equipped with a walking wheel (11) and a drive motor (12). The walking wheel (11) is driven by friction with the guide rail. The drive motor (12) is connected to the walking wheel (11) and the drilling rail through a transmission assembly. The positioning component (7) is detachably fixed on the guide rail by bolts. The mounting base (1) is equipped with a switching component. The switching component, in conjunction with the transmission component, adjusts the alternating transmission connection between the drive motor (12), the traveling wheel (11), and the drilling rail. The transmission assembly is used to drive the motor (12) to the traveling wheel (11) and the drilling rail. The transmission assembly includes a driving wheel (5), a driven wheel (51), a docking wheel (52), a hydraulic cylinder (53), a reciprocating screw (54), and a piston plate (55). The driving wheel (5) is fixedly installed at the output end of the drive motor (12), the driven wheel (51) is connected to the walking wheel (11), the hydraulic cylinder (53) is fixedly installed inside the mounting base (1), a reciprocating screw (54) is rotatably installed inside the hydraulic cylinder (53), a piston plate (55) is slidably installed inside the hydraulic cylinder (53), the piston plate (55) and the reciprocating screw (54) are screw driven, and a docking wheel (52) is fixedly installed at one end of the reciprocating screw (54) outside the hydraulic cylinder (53). The switching component includes a slide bar (6); The mounting base (1) is provided with a switching groove (61), the sliding column (6) is slidably installed in the switching groove (61), the positioning member (7) is provided with inclined surfaces on both sides, the positioning member (7) is located on the movement path of the sliding column (6), the sliding column (6) is fixedly connected to the drive motor (12), the driving wheel (5) is located between the driven wheel (51) and the docking wheel (52), and in the initial state the driving wheel (5) is engaged with the driven wheel (51) and separated from the docking wheel (52).

2. The turbine low-pressure diaphragm sleeve air guide hole machining positioning guide device according to claim 1, characterized in that: The adjustment assembly includes a rotating shaft (41) and a fixed pin (42). The rotating shaft (41) is rotatably installed in the adjusting groove (4), the guide rail is fixedly installed on the rotating shaft (41), and a fixing pin (42) is threaded on the mounting base (1). The rotating shaft (41) has evenly distributed slots (43) in the circumferential direction. In the initial state, the fixing pin (42) extends into the slot (43).

3. The turbine low-pressure diaphragm sleeve air guide hole machining positioning guide device according to claim 1, characterized in that: The guide rail is a flexible and deformable track, and the guide rail is composed of a belt (2), rigid teeth (21) and a joint plate (22); There are two belts (2), and both ends of the belts (2) are installed on the joint plate (22). The two belts (2) are arranged parallel to each other vertically. The belts (2) are fixedly installed with uniformly distributed rigid teeth (21) on their respective sides, and the rigid teeth (21) are all L-shaped structures.

4. The turbine low-pressure diaphragm sleeve air guide hole machining positioning guide device according to claim 3, characterized in that: A reinforcing cavity (23) is provided on one side of the connector plate (22). An inclined abutment plate (25) is elastically installed in the reinforcing cavity (23) by a spring. The abutment plate (25) is used to limit the rigid tooth (21) in one direction.

5. The turbine low-pressure diaphragm sleeve air guide hole machining positioning guide device according to claim 1 or 4, characterized in that: The drilling rail consists of a track plate (3), a hydraulic telescopic rod (31), and a slide block (32); The track plate (3) is fixedly installed on the adjustment assembly, the hydraulic telescopic rod (31) is fixedly installed on the track plate (3), the slide (32) is slidably installed on the track plate (3), the universal drill is fixedly installed on the slide (32), and the output end of the hydraulic telescopic rod (31) is connected to the slide (32).

6. The turbine low-pressure diaphragm sleeve air guide hole machining positioning guide device according to claim 5, characterized in that: The output end of the hydraulic telescopic rod (31) is elastically connected to the slide (32) through a spring plate (33).

7. The turbine low-pressure diaphragm sleeve air guide hole machining positioning guide device according to claim 1, characterized in that: The switching assembly also includes an inflatable bladder (62) and a lifting rod (63). The hydraulic cylinder (53) has an oil-free chamber with an inflatable bladder (62) fixedly installed. The inflatable bladder (62) is located on the movement path of the piston plate (55). A lifting rod (63) is fixedly installed on the central shaft of the traveling wheel (11). The lifting rod (63) is a pneumatic telescopic rod. The driven wheel (51) is fixedly installed on the lifting rod (63). The lifting rod (63) and the inflatable bladder (62) are connected by a pipe for one-way communication. A one-way air inlet pipe (64) is fixedly installed on the inflatable bladder (62). A one-way air outlet pipe (65) is fixedly installed on the lifting rod (63).

8. The turbine low-pressure diaphragm sleeve air guide hole machining positioning guide device according to claim 7, characterized in that: When the piston plate (55) is reset, the air injection efficiency of the airbag (62) into the lifting rod (63) is greater than the air output efficiency of the one-way air outlet pipe (65).

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