Inside-cylinder peeping inspection device for steam turbine

Abstract

The utility model discloses a steam turbine cylinder interior peeping inspection device, which relates to the technical field of steam turbines, and comprises a mounting seat, a plurality of steam turbine cylinders and a plurality of steam turbine cylinder interior peeping inspection devices, the moving wheel set is arranged at the bottom of the mounting seat, and the moving wheel set is used for moving on the inner wall of the steam turbine; the conveying assembly is rotationally arranged on the mounting base, and the conveying assembly is used for conveying a detection instrument; according to the technical scheme provided by the utility model, the inspection of the interior of the steam turbine can be completed under the condition of not stopping or reducing the stopping time, so that the time required by operations such as cooling, cylinder uncovering construction and the like is greatly reduced, the long-time stopping maintenance can be avoided, the maintenance cost is reduced, and the detection accuracy is improved by accurately controlling the position and angle of a detection instrument. The endoscope can go deep into an area which cannot be touched by a common endoscope to obtain more detailed and accurate internal conditions, so that the inspection flexibility is improved, and the application range is expanded.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine technology, and in particular to a device for in-cylinder inspection of steam turbines. Background Technology

[0002] In modern thermal power plants, large steam turbine units are core equipment, and their stable operation is crucial for power supply. However, in actual operation, various anomalies inevitably occur in steam turbine units. If these anomalies are not dealt with in time, they may lead to equipment damage or even accidents. Currently, the monitoring of the internal condition of steam turbine units mainly relies on the analysis of data provided by online measuring instruments. Although this indirect method can reflect the working status of the unit to a certain extent, it is difficult to provide accurate information on specific problems in certain hidden parts. When more detailed inspection is required, traditional industrial endoscopes are commonly used tools. A camera is inserted into the pipe through soft and hard data cables to obtain internal image data. However, traditional endoscopes are often inadequate when faced with complex structures, multiple bends, narrow spaces, and pores in high-temperature environments. They cannot penetrate into key areas for effective inspection. If further inspection is required, the steam turbine must be shut down, cooled, and then the cylinder opened for inspection, which not only increases maintenance time and costs but also affects the stability of power supply. Utility Model Content

[0003] The main purpose of this invention is to propose a device for internal inspection of steam turbine cylinders, which aims to solve the technical problem that the endoscope cannot be inserted into the steam turbine cylinder for in-depth inspection.

[0004] To achieve the above objectives, this utility model proposes a device for internal inspection of steam turbine cylinders, comprising:

[0005] Mounting base;

[0006] The drive structure is located on the mounting base;

[0007] A movable wheel assembly is located at the bottom of the mounting base, and the drive structure is connected to the movable wheel assembly to drive the mounting base to move within the turbine's inner wall; and

[0008] A conveying assembly is rotatably mounted on the mounting base, and the conveying assembly is used to convey the testing instrument.

[0009] In one embodiment, the detection instrument is configured as an industrial endoscope, the industrial endoscope including a data cable and a first camera mounted at the end of the data cable, and the delivery assembly including:

[0010] The housing is rotatably mounted on the mounting base;

[0011] A conveyor wheel assembly is rotatably mounted on the housing. The conveyor wheel assembly includes two conveyor wheels, which are spaced apart. The data cable is located in the gap between the two conveyor wheels and contacts the conveyor wheels on both sides. The rotation of the conveyor wheels causes the data cable to be conveyed outward or retracted inward.

[0012] In one embodiment, the conveying assembly further includes a first rotating structure, the first rotating structure including a first drive motor and a first rotating shaft, the first drive motor being disposed inside the housing and its output end being connected to the first rotating shaft, the other end of the first rotating shaft being connected to the conveying wheel;

[0013] And / or, each of the conveyor wheel sets includes at least two that are arranged in parallel;

[0014] And / or, the conveying assembly further includes a second rotating structure, the second rotating structure including a second drive motor and a second rotating shaft, the second drive motor being disposed within the mounting base, the second drive motor driving the housing to rotate via the second rotating shaft.

[0015] In one embodiment, the conveying assembly further includes an elastic element disposed on the side of each of the conveying wheels away from the other conveying wheel, with one end elastically connected to the conveying wheel and the other end elastically connected to the housing, the elastic element being compressed to give the conveying wheel a tendency to move toward the other conveying wheel.

[0016] In one embodiment, the device for inspecting the inside of a steam turbine cylinder further includes a second camera, which is mounted on the mounting base.

[0017] In one embodiment, the device for inspecting the inside of a steam turbine cylinder further includes an adsorption component installed at the bottom of the mounting base. The adsorption component is used to adsorb onto the inner wall of the steam turbine to press the movable wheel assembly against the inner wall of the steam turbine.

[0018] In one embodiment, the adsorption component is configured as an electromagnetic coil, and the device for inspecting the inside of a turbine cylinder further includes an electrical control line electrically connected to the electromagnetic coil.

[0019] In one embodiment, the device for inspecting the inside of a steam turbine cylinder includes multiple mounting bases, each mounting base having at least one set of movable wheels and at least one conveying component, and the multiple mounting bases are arranged in series.

[0020] In one embodiment, adjacent mounting bases are connected in series via the electrical control line.

[0021] In one embodiment, the device for inspecting the inside of a steam turbine cylinder further includes a controller, which is located in the mounting base and electrically connected to the electrical control line, the electromagnetic coil, the conveying assembly, and the moving wheel set, respectively.

[0022] In this invention, the in-cylinder inspection device for steam turbines includes a mounting base. A set of movable wheels is mounted at the bottom of the mounting base, allowing the mounting base to move within the steam turbine cylinder to a relatively deep position. At least one conveying component is positioned above the mounting base to transport the inspection instrument. Specifically, the inspection device extends into the steam turbine cylinder and moves inward via the movable wheels, stopping at points requiring inspection, such as bends. Since there are areas within the cylinder that are difficult for the mounting base to reach, the conveying component can advance the end of the clamped inspection instrument. Furthermore, the conveying component can rotate relative to the mounting base, allowing for adjustment. The angle of the testing instrument allows it to cover a wider range and acquire data from more perspectives, facilitating the inspection of hard-to-reach areas, especially those with many bends and narrow openings. Compared to cylinder opening inspection, this device can complete the inspection of the turbine's interior without shutting down or with reduced downtime, significantly reducing the time required for cooling, cylinder opening, and other operations. It also avoids prolonged downtime for maintenance, lowering repair costs. By precisely controlling the position and angle of the testing instrument, it can reach areas inaccessible to ordinary endoscopes, obtaining more detailed and accurate internal information, improving the flexibility of inspection, and expanding its applicability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of the in-cylinder inspection device for steam turbines provided by this utility model;

[0025] Figure 2 This is a schematic diagram of another embodiment of the in-cylinder inspection device for steam turbines provided by this utility model.

[0026] Figure 3 This is a schematic diagram of the structure of the in-cylinder inspection device for steam turbines provided by this utility model.

[0027] Explanation of icon numbers:

[0028] 10. Inspection device

[0029] 100. Mounting bracket;

[0030] 200. Moving wheel set;

[0031] 300, Conveying assembly; 310, Housing; 320, Conveying wheel assembly; 321, Conveying wheel; 330, First rotating shaft; 340, Second rotating shaft; 350, Elastic element;

[0032] 400. Second camera;

[0033] 500. Electrical control wire; 510. Socket;

[0034] 600. Adsorption component;

[0035] 20. Testing instruments; 201. Data cable; 202. First camera.

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0038] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] In modern thermal power plants, large steam turbine units are core equipment, and their stable operation is crucial for power supply. However, in actual operation, various anomalies inevitably occur in steam turbine units. If these anomalies are not addressed in a timely manner, they may lead to equipment damage or even accidents. Currently, monitoring the internal condition of steam turbine units mainly relies on the analysis of data provided by online measuring instruments. While this indirect method can reflect the unit's operating status to some extent, it is difficult to provide accurate information on specific problems in certain hidden areas. When more detailed inspection is required, traditional industrial endoscopes are commonly used. A camera is inserted into the pipes via flexible and rigid data cables to obtain internal images. However, this method is limited when dealing with complex structures. Traditional endoscopes often fall short in the face of winding passages, narrow spaces, and high-temperature environments, making it impossible to effectively inspect critical areas. Some intelligent robots have been attempted for inspection of sealed metal pipes and cylinders. However, due to their large size, robots cannot enter confined spaces and are costly and inconvenient to use. If further detailed inspection is required, the turbine must be shut down and allowed to cool before the cylinder is opened for inspection. Cooling down from the rated operating temperature (540-600℃) according to the turbine manufacturer's specifications typically takes 5-12 days. In addition, the cylinder opening and overhaul usually requires a construction team of 60-80 people and takes 35-45 days to complete, which not only increases maintenance time and costs but also affects the stability of power supply.

[0041] This invention proposes a device for internal inspection of steam turbine cylinders.

[0042] Please see Figure 1 In one embodiment of this utility model, the in-cylinder inspection device 10 for steam turbines includes:

[0043] Mounting base 100;

[0044] The drive structure is located on the mounting base 100;

[0045] A movable wheel assembly 200 is located at the bottom of the mounting base 100. A drive structure drives the movable wheel assembly 200 to move the mounting base 100 along the inner wall of the turbine.

[0046] The conveying assembly 300 is rotatably mounted on the mounting base 100 and is used to convey the testing instrument 20.

[0047] In the technical solution of this utility model, the in-cylinder inspection device 10 for steam turbines includes a mounting base 100. A set of movable wheels 200 is mounted on the bottom of the mounting base 100 to support the mounting base 100 as it moves within the steam turbine cylinder, allowing it to reach a relatively deep position within the cylinder. At least one conveying assembly 300 is provided above the mounting base 100 to convey the inspection instrument 20. Specifically, the inspection device 10 extends into the steam turbine cylinder and moves inward via the movable wheels 200, stopping at locations requiring inspection, such as bends. Since there are areas within the cylinder that are difficult for the mounting base 100 to reach, the conveying assembly 300 can advance the end of the clamped inspection instrument 20 forward. The instrument 20 can rotate relative to the mounting base 100, thereby adjusting the angle of the instrument 20. This allows the instrument 20 to cover a wider range, acquire data from more perspectives, and facilitate the inspection of hard-to-reach areas, especially those with many bends and narrow openings. Compared to cylinder opening inspection, this device can complete the inspection of the turbine's interior without stopping the machine or with reduced downtime. This significantly reduces the time required for operations such as cooling and cylinder opening, and also avoids long-term downtime maintenance, reducing maintenance costs. By precisely controlling the position and angle of the instrument 20, it can reach areas that ordinary endoscopes cannot access, obtaining more detailed and accurate internal conditions, improving the flexibility of the inspection, and expanding its applicability.

[0048] Specifically, the mounting base 100, as the main load-bearing structure, can be square or other irregularly shaped; its shape is not limited. Its material is preferably metal, capable of withstanding high temperatures, facilitating operation within the turbine cylinder under high-temperature conditions. In this embodiment, the mounting base 100 is a rectangular structure, with dimensions of 100mm in length, 80mm in width, and 100mm in height, and a weight of <0.5kg. It is suitable for various conventional auxiliary pipes within the turbine cylinder. The mounting base 100 has an internal cavity containing a drive structure. A set of movable wheels 200 is rotatably mounted at the bottom of the mounting base 100. The drive structure is connected to the movable wheels 200, driving them to rotate. Thus, the drive structure and the movable wheels 200 move the mounting base 100 along the inner wall of the turbine cylinder. The wheel assembly 200 includes at least one pair of movable wheels disposed on both sides of the mounting base 100. The movable wheels on both sides can be independently controlled, such as by driving each wheel with a motor connected to a gearbox and gear shaft, or by connecting the movable wheels via belts / chains, etc. The connection method can adopt common structures and is not limited thereto. It should be noted that the movable wheels need to be heat-resistant, wear-resistant, and have good corrosion resistance. Polyurethane, ceramic composite materials, or metal matrix composite materials can be selected. At least one conveying assembly 300 is installed on the top of the mounting base 100. The conveying assembly 300 can rotate relative to the mounting base 100 to adjust the angle of the detection instrument 20. It can also advance the detection instrument 20 forward along the inside of the turbine according to the detection distance and position, and can also change the angle as needed so that the detection instrument 20 can cover a wider range and obtain data from more perspectives.

[0049] Please see Figure 1 and Figure 2 In an embodiment of this utility model, the detection instrument 20 is configured as an industrial endoscope, which includes a data cable 201 and a first camera 202 installed at the end of the data cable 201. The delivery assembly 300 includes:

[0050] Housing 310 is rotatably mounted on mounting base 100;

[0051] The conveyor wheel assembly 320 is rotatably mounted on the housing 310. The conveyor wheel assembly 320 includes two conveyor wheels 321, which are spaced apart. The data cable 201 is located in the gap between the two conveyor wheels 321 and contacts the conveyor wheels 321 on both sides. The rotation of the conveyor wheels 321 causes the data cable 201 to be conveyed outward or retracted inward.

[0052] Specifically, please refer to Figure 1The housing 310 serves as the outer shell of the conveying assembly 300 and is used to mount the conveying wheel assembly 320. The conveying wheel assembly 320 includes two conveying wheels 321 spaced apart, with the gap between the two conveying wheels 321 forming a channel. The data cable 201 of the industrial endoscope passes through the channel, and both sides of the data cable 201 contact the outer periphery of the conveying wheels 321, meaning there is friction between the data cable 201 and the conveying wheels 321. As the conveying wheels 321 rotate, they can guide the data cable 201 forward or backward, achieving effective pushing and retraction actions. When the conveying wheels 321 rotate in a specific direction, the friction between the conveying wheels 321 and the data cable 201, due to the data cable 201 being clamped between the two side conveying wheels 321, will push the data cable 201 outward. When the conveyor wheel 321 rotates in the opposite direction, the data cable 201 will retract inward. By controlling the rotation speed and direction of the conveyor wheel 321, the position of the data cable 201 can be finely adjusted. Since the data cable 201 is held in the channel formed between the two conveyor wheels 321, it can be ensured that the data cable 201 always maintains the correct path during movement and will not get tangled. Furthermore, since the housing 310 is rotatably connected to the mounting base 100, the angle of the first camera 202 at the end of the data cable 201 changes accordingly. Not only can the data cable 201 be pushed along a straight line, but the angle of the first camera 202 can also be adjusted as needed, which is convenient for checking different angles, improving the flexibility and comprehensiveness of the inspection, and is suitable for environments with many bends or narrow gaps.

[0053] Please see Figure 1 In an embodiment of this utility model, the conveying assembly 300 further includes a first rotating structure, which includes a first drive motor and a first rotating shaft 330. The first drive motor is located inside the housing 310, and its output end is connected to the first rotating shaft 330. The other end of the first rotating shaft 330 is connected to the conveying wheel 321. The first drive motor, as a power source, is installed inside the housing 310, and its output end is connected to the conveying wheel 321 via the first rotating shaft 330. Specifically, the output end of the motor and the first rotating shaft 330 can be connected by a coupling or a keyway. The other end of the first rotating shaft 330 is fixedly connected to the conveying wheel 321. The power of the first drive motor is transmitted through the first rotating shaft 330, causing the conveying wheel 321 to rotate. The rotation of the conveying wheel 321 can drive the data cable 201 to move forward. Specifically, each conveying wheel 321 is connected to a first drive motor and a first rotating shaft 330 to realize the rotation of the conveying wheel 321.

[0054] Please see Figure 1In another embodiment, at least two conveyor wheel sets 320 are provided and arranged in parallel, that is, at least two conveyor wheels 321 are arranged in parallel on each side of the data line 201, which enhances the support for the data line 201, prevents the data line 201 from bending, and improves the stability during the pushing process. In addition, at least two conveyor components 300 are provided and are spaced apart along the length direction of the data line 201. The data line 201 passes through the channel formed by each conveyor component 300 in sequence, which can better distribute the pressure on the data line 201, avoid damage caused by excessive force on a single point on the data line 201, and also make the pushing of the data line 201 more stable, making it easier to push the data line 201 to places that are not easy to reach.

[0055] Please see Figure 3 In one embodiment, the conveying assembly 300 further includes a second rotating structure, which includes a second drive motor and a second rotating shaft 340. The second drive motor is disposed in the mounting base 100 and drives the housing 310 to rotate through the second rotating shaft 340.

[0056] Specifically, the second drive motor is installed inside the mounting base 100 and serves as the power source for the conveying component 300. It can be a servo motor or a stepper motor. It is connected to the housing 310 through the second rotating shaft 340. The second rotating shaft 340 transmits the power of the second drive motor to the housing 310 to drive the housing 310 to rotate. This allows the housing 310 to rotate around the second rotating shaft 340, which facilitates the adjustment of the angle of the first camera 202 and drives the data cable 201 to extend in different directions, thereby expanding the inspection range and improving the flexibility of the inspection.

[0057] Please see Figure 2 In an embodiment of the present invention, the conveying assembly 300 further includes an elastic element 350. The elastic element 350 is disposed on the side of each conveying wheel 321 away from the other conveying wheel 321, and one end is elastically connected to the conveying wheel 321, and the other end is elastically connected to the housing 310. The elastic element 350 is compressed so that the conveying wheel 321 has a tendency to move toward the other conveying wheel 321.

[0058] Specifically, a conveyor wheel 321 contacts each side of the data cable 201. An elastic element 350 is provided on the side of each conveyor wheel 321 away from the other. One end of the elastic element 350 is connected to the housing 310, and the other end is connected via a bearing (not shown) to a first rotating shaft 330 for driving the conveyor wheel 321 to rotate. The elastic element 350 is in a compressed state, and in this compressed state, it has a restoring force, causing the conveyor wheel 321 to tend to move towards the other conveyor wheel 321. In other words, the elastic element 350 allows the two conveyor wheels 321 to move towards each other. The closer proximity of the data lines 201 allows for clamping, preventing them from coming off during the rotation of the conveyor wheel 321 and avoiding deviation from the predetermined path. Furthermore, the elastic element 350 allows the conveyor assembly 300 to accommodate data lines 201 of different diameters. If the data line 201 is thicker, the elastic element 350 adjusts the compression to maintain appropriate clamping force; if the data line 201 is thinner, the elastic element 350 reduces the compression, ensuring that the outer wall of the conveyor wheel 321 remains tightly fitted to the surface of the data line 201, preventing the data line 201 from bending and improving the stability of the propulsion process.

[0059] Please see Figure 1 In an embodiment of this utility model, the turbine cylinder inspection device 10 further includes a second camera 400, which is mounted on the mounting base 100.

[0060] Specifically, after the mounting base 100 enters the turbine cylinder, the second camera 400 can acquire overall internal image information. The drive structure drives the entire mounting base 100 forward along a predetermined path. The second camera 400 collects image data and transmits the image or video data to the control terminal. The control terminal controls the conveying component 300 to move to the target position in coordination with the first and second rotating structures for detailed inspection. This helps improve inspection efficiency. The second camera 400 can also be used for pre-detection and decision-making, reducing unnecessary movement.

[0061] In an embodiment of this utility model, the turbine cylinder inspection device 10 further includes an adsorption component 600, which is installed at the bottom of the mounting base 100. The adsorption component 600 is used to adsorb onto the inner wall of the turbine to press the movable wheel assembly 200 against the inner wall of the turbine.

[0062] Specifically, the adsorption component 600 can adsorb the entire mounting base 100 onto the inner wall of the turbine cylinder, so that the moving wheel set 200 is pressed against the inner wall of the turbine cylinder. In other words, the adsorption device enables the inspection device 10 to remain stable on various curved and inclined surfaces, reducing the risk of operational failure due to slippage or deviation from the path. It can ensure that the inspection device 10 can hover at various angles, which is convenient for high-precision detection, and can also reduce the risk of accidental detachment or damage.

[0063] In one embodiment, when the inspection device is inverted and adsorbed onto the inner wall of the turbine cylinder, the adsorption component 600 prevents the mounting base 100 from falling off. To prevent the data cable 201 of the industrial endoscope held by the conveyor wheel 321 from falling off, a groove (not shown) can be provided on the outer periphery of the conveyor wheel 321. The groove is arranged along the circumference of the conveyor wheel 321. That is to say, the data cable 201 is engaged in the channel formed by the grooves of the conveyor wheels 321 on both sides. The data cable can be fed forward or retracted backward by the rotation of the conveyor wheel 321. The chute can be used to detect different positions, and it can better hold the data cable 201 in place to prevent it from falling off. Alternatively, a connecting seat (not shown) can be set on each side of the top of the mounting base 100. The line connecting the two connecting seats is in the length direction of the data cable 201. Each connecting seat has a through hole. The data cable passes through one of the through holes, through the channel formed by the conveyor wheel 321, and then through the other through hole. When the conveyor wheel 321 rotates to convey the data cable 201, the connecting seat and the through hole can also prevent the data cable 201 from falling off.

[0064] In an embodiment of this utility model, the adsorption component 600 is configured as an electromagnetic coil, and the turbine cylinder in-situ inspection device 10 also includes an electrical control line 500, which is electrically connected to the electromagnetic coil.

[0065] Specifically, the adsorption component 600 is configured as an electromagnetic coil, which is connected to the electromagnetic coil via the control line 500 to supply power, giving the electromagnetic coil a magnetic attraction force. Since the turbine cylinder has a metal tube wall, when the electromagnetic coil is energized, the magnetic attraction force allows the device to be adsorbed and closed inside the turbine cylinder. The attraction force also allows the inspection device 10 to remain stable on surfaces at various angles and with inclinations. With the adsorption component 600, when the inspection device 10 reaches the area to be inspected, it can be suspended in that area. Then, the inspection instrument 20 is further transported to the inspection position by the conveying component 300 for detailed inspection. It should also be noted that in order to prevent the control line 500 from being affected by high-temperature environments, a protective layer, such as an asbestos protective layer and a stainless steel mesh protective layer, needs to be set on the outer periphery of the control line 500. The asbestos protective layer and the stainless steel mesh protective layer can be set sequentially from the inside to the outside to improve the protection. To avoid the control line 500 being too heavy, the thickness of the protective layer is 0.5-1mm.

[0066] In other embodiments, the adsorption component 600 can also be configured for vacuum adsorption, such as a vacuum pump working with a sealing ring and a suction cup to form a vacuum adsorption, and the adsorption effect is achieved by drawing air to form a negative pressure so that the inspection device 10 is adsorbed onto the inner wall of the turbine cylinder.

[0067] Please see Figure 3 In an embodiment of this utility model, the turbine cylinder inspection device 10 includes multiple mounting seats 100, each mounting seat 100 having at least one moving wheel set 200 and at least one conveying component 300, and the multiple mounting seats 100 are connected in series.

[0068] Specifically, multiple mounting bases 100 can operate independently, each as an independent working unit. They enter the turbine cylinder via the moving wheel set 200. Upon reaching a corner, bend, or a problem-prone area, the adsorption component 600 is energized and hovers at that position. The conveying component 300 on the mounting base 100 transports the testing instrument 20 to the testing position. The remaining mounting bases 100 continue to move towards the turbine interior with the moving wheel set 200. Once the first mounting base 100 reaches the innermost part, a comprehensive inspection can be carried out, and the inspection data is transmitted to the control terminal in real time, ensuring the entire inspection process is comprehensive, efficient, and orderly. The adsorption component 600 ensures that the mounting base 100 will not slip or deviate from its position during the inspection. Multiple mounting bases 100 working collaboratively can complete a comprehensive inspection of the turbine interior in a single operation, reducing the time cost of repeated entry and exit and improving inspection efficiency.

[0069] Please see Figure 1 and Figure 3 In an embodiment of this utility model, adjacent mounting bases 100 are connected in series via an electrical control line 500.

[0070] Specifically, the end of the electrical control line 500 is provided with a plug, and sockets 510 are provided on both ends of the mounting base 100. By connecting the plug and sockets 510, power can be supplied to the drive structure, electromagnetic coil, first rotating structure, and second rotating structure inside the mounting base 100 that drive the moving wheel assembly 200. To prevent the electrical control line 500 from disconnecting from the mounting base 100, a locking nut can be provided at the plug end of the electrical control line 500, and a screw hole can be provided on the socket 510 of the mounting base 100. By screwing the locking nut into the screw hole, it can be prevented from disconnecting inside the turbine. By connecting the electrical control lines 500 in series, power can be supplied to each structure inside the mounting base 100. On the other hand, if a partially detected structure fails or malfunctions, it can be pulled out to prevent it from being left inside. In accordance with the plug, an asbestos protective layer and a stainless steel mesh protective layer are also provided on the outer surface of the socket 510 to resist internal heat.

[0071] In an embodiment of this utility model, the turbine cylinder inspection device 10 further includes a controller, which is located in the mounting base 100 and is electrically connected to the electrical control line 500, the electromagnetic coil, the conveying assembly 300, and the moving wheel set 200, respectively.

[0072] Specifically, a controller is installed in each mounting base 100, and the power supply line 500 powers the controller. The controller receives electrical signals from the control terminal, the detection instrument 20, and the second camera 400, and controls whether the electromagnetic coil is energized according to the signal from the control terminal, thereby improving the intelligence of the entire inspection process, reducing human intervention, and improving inspection efficiency.

[0073] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A device for inspecting the inside of a steam turbine cylinder, characterized in that, include: Mounting base; The drive structure is located on the mounting base; A movable wheel assembly is located at the bottom of the mounting base, and the drive structure drives the movable wheel assembly to move the mounting base on the inner wall of the steam turbine. as well as A conveying assembly is rotatably mounted on the mounting base, and the conveying assembly is used to convey the testing instrument.

2. The in-cylinder inspection device for steam turbines as described in claim 1, characterized in that, The testing instrument is configured as an industrial endoscope, which includes a data cable and a first camera mounted at the end of the data cable. The delivery assembly includes: The housing is rotatably mounted on the mounting base; A conveyor wheel assembly is rotatably mounted on the housing. The conveyor wheel assembly includes two conveyor wheels, which are spaced apart. The data cable is located in the gap between the two conveyor wheels and contacts the conveyor wheels on both sides. The rotation of the conveyor wheels causes the data cable to be conveyed outward or retracted inward.

3. The in-cylinder inspection device for steam turbines as described in claim 2, characterized in that, The conveying assembly further includes a first rotating structure, which includes a first drive motor and a first rotating shaft. The first drive motor is located inside the housing and its output end is connected to the first rotating shaft. The other end of the first rotating shaft is connected to the conveying wheel. And / or, each of the aforementioned conveyor wheel sets is provided with at least two and arranged in parallel; And / or, the conveying assembly further includes a second rotating structure, the second rotating structure including a second drive motor and a second rotating shaft, the second drive motor being disposed within the mounting base, the second drive motor driving the housing to rotate via the second rotating shaft.

4. The in-cylinder inspection device for steam turbines as described in any one of claims 2 to 3, characterized in that, The conveying assembly further includes an elastic element disposed on the side of each of the conveying wheels away from the other conveying wheel, with one end elastically connected to the conveying wheel and the other end elastically connected to the housing. The elastic element is compressed to give the conveying wheel a tendency to move toward the other conveying wheel.

5. The in-cylinder inspection device for steam turbines as described in claim 1, characterized in that, The device for inspecting the inside of a steam turbine cylinder also includes a second camera, which is mounted on the mounting base.

6. The in-cylinder inspection device for steam turbines as described in claim 1, characterized in that, The device for inspecting the inside of a steam turbine cylinder further includes an adsorption component, which is installed at the bottom of the mounting base and is used to adsorb onto the inner wall of the steam turbine to press the moving wheel assembly against the inner wall of the steam turbine.

7. The in-cylinder inspection device for steam turbines as described in claim 6, characterized in that, The adsorption component is configured as an electromagnetic coil, and the device for inspecting the inside of a steam turbine cylinder also includes an electrical control line, which is electrically connected to the electromagnetic coil.

8. The in-cylinder inspection device for steam turbines as described in claim 7, characterized in that, The device for inspecting the inside of a steam turbine cylinder includes multiple mounting bases, each mounting base having at least one set of movable wheels and at least one conveying component, and the multiple mounting bases are arranged in series.

9. The in-cylinder inspection device for steam turbines as described in claim 8, characterized in that, The adjacent mounting bases are connected in series via the electrical control line.

10. The in-cylinder inspection device for steam turbines as described in claim 7, characterized in that, The device for inspecting the inside of a steam turbine cylinder also includes a controller, which is located in the mounting base and is electrically connected to the electrical control line, the electromagnetic coil, the conveying assembly, and the moving wheel set, respectively.

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