A kind of power plant equipment maintenance device

Abstract

The utility model provides a kind of overhaul device for power plant equipment, including lifting platform;Rotary frame, rotation is set in the above of lifting platform by vertical rotation axis;Detection device, is set on the rotary frame, including four detection units that are evenly spaced around the rotary frame;Driving device, is set between lifting platform and the rotary frame, for driving four the detection unit and one-to-one corresponding four virtual vertical plane reciprocating motion in horizontal direction, and four the virtual vertical plane is around and set into the cylindrical passage with rectangular cross section, by this way, water-cooled wall can be detected automatically layer by layer, so as to reduce the labor intensity of worker, and the way of layer-by-layer detection can avoid the phenomenon of missing detection.

Description

Technical Field

[0001] This invention generally relates to the field of maintenance equipment technology, and specifically to a maintenance device for power plant equipment. Background Technology

[0002] Boilers are important equipment in power plants, and the quality of boiler operation directly affects the power generation efficiency and safety of the power generation system. Therefore, boilers need to be inspected at regular intervals. Currently, the internal maintenance of boilers is mostly carried out by setting up a lifting platform inside the boiler, and then workers stand on the lifting platform to inspect the inner wall and water-cooled wall of the boiler. After finding the problem, they are repaired. However, manual inspection is prone to missed inspections and has low detection efficiency. Summary of the Invention

[0003] In view of the above problems, this application provides a maintenance device for power plant equipment.

[0004] This invention provides a maintenance device for power plant equipment, comprising:

[0005] Lifting platform;

[0006] A rotating frame is rotatably mounted above the lifting platform via a vertical rotating shaft;

[0007] The detection device, mounted on the rotating frame, includes four detection units evenly spaced around the rotating frame.

[0008] A driving device is disposed between the lifting platform and the rotating frame, used to drive the four detection units and the four corresponding virtual vertical planes to reciprocate in the horizontal direction, and the four virtual vertical planes enclose a cylindrical channel with a rectangular cross-section.

[0009] Furthermore, the driving device includes a drive shaft coaxially arranged with the vertical rotating shaft, four first power telescopic rods arranged on the rotating frame corresponding one-to-one with the four detection units, and a mounting plate vertically arranged at the end of the first power telescopic rods. The drive shaft is drivenly connected to the rotating frame, and the four first power telescopic rods are all horizontally arranged. The mounting plate is rotatably connected to the first power telescopic rods through a vertical pin. The detection units are arranged on the side of the mounting plate away from the first power telescopic rods. The driving device also includes a drive motor arranged between the first power telescopic rods and the mounting plate for driving the mounting plate to reciprocate around the vertical pin.

[0010] Furthermore, the mounting plate includes a guide plate rotatably connected to the first power telescopic rod and a sliding plate that slides and guides the guide plate in the vertical direction. A lead screw is also provided on the guide plate along the guiding direction, and a lead screw nut is threaded onto the lead screw. The sliding plate is connected to the lead screw nut, and the lead screw is connected to the driving device. The driving device is also used to drive the lead screw to reciprocate to drive the sliding plate to reciprocate in the vertical direction. The detection unit is disposed on the sliding plate.

[0011] Furthermore, the driving device also includes four transmission shafts that correspond one-to-one with the four first power telescopic rods. One end of each of the four transmission shafts is driven to the drive shaft, and the other end is driven to the lead screw.

[0012] Furthermore, the drive device also includes four first locking members disposed between the rotating frame and the four drive shafts, a second locking member disposed between the rotating frame and the lifting platform, and a control unit for controlling the first locking members and the second locking members to work alternately. When the first locking member is working, it can lock the drive shaft to restrict its rotation. When the second locking member is working, it can lock the rotating frame and the lifting platform to a fixed connection, restricting the relative rotation of the rotating frame and the lifting platform.

[0013] Furthermore, a connecting cylinder is arranged around and coaxially with the drive shaft on the rotating frame. The connecting cylinder is provided with through holes corresponding to the four drive shafts one by one. The end of the drive shaft extending into the connecting cylinder is provided with a first bevel gear, and the end of the drive shaft is provided with a second bevel gear that is connected to the four first bevel gears.

[0014] Furthermore, the lead screw is coaxially arranged with the corresponding vertical pin shaft, a rotating cylinder is sleeved on the lead screw, a third bevel gear is provided at the end of the transmission shaft that extends into the rotating cylinder, a fourth bevel gear adapted to the third bevel gear is provided on the lead screw, the third bevel gear is limitedly engaged with the inner side wall of the rotating cylinder, and the transmission shaft is a telescopic shaft.

[0015] Furthermore, the rotating frame includes a rotating plate that is parallel to and rotatably coupled with the lifting platform, and a support ring disposed on the upper surface of the rotating plate and coaxial with the vertical rotating shaft. The support ring is provided with a support hole that is adapted to the first power telescopic rod and the transmission shaft. The end of the first power telescopic rod is detachably connected to the connecting cylinder.

[0016] Furthermore, the lifting platform includes a horizontally arranged rigid plate, four pneumatic telescopic rods evenly spaced around the vertical rotating shaft on the side of the rigid plate, and drive rollers disposed at the ends of the pneumatic telescopic rods.

[0017] Furthermore, the pneumatic telescopic rod is a double-rod cylinder.

[0018] Beneficial effects

[0019] This invention provides a maintenance device for power plant equipment, including a lifting platform; a rotating frame rotatably mounted above the lifting platform via a vertical shaft; a detection device mounted on the rotating frame, comprising four detection units evenly spaced around the rotating frame; and a driving device positioned between the lifting platform and the rotating frame, used to drive the four detection units to reciprocate horizontally with four corresponding virtual vertical planes, the four virtual vertical planes forming a rectangular cylindrical channel. The driving device drives the four detection units to move horizontally, simultaneously performing detection. This allows the four detection units to inspect the sidewalls of four water-cooled walls at the same height as the detection units. After inspection, the lifting platform rises a certain height, and the driving device then drives the four detection units to move horizontally again, repeating this process to complete a comprehensive inspection of the water-cooled walls. The detection units can be commonly used detection devices in existing technologies, such as ultrasonic testing. This method allows for automatic, layer-by-layer inspection of the water-cooled walls, reducing worker workload and preventing missed inspections. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0021] Figure 1 This is a side view of a maintenance device for power plant equipment provided by the present invention.

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure at point AA in a power plant equipment maintenance device provided by the present invention.

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure at point BB in a maintenance device for power plant equipment provided by the present invention.

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure at point CC in a maintenance device for power plant equipment provided by the present invention.

[0025] Figure 5 This is a partially enlarged structural diagram of point D in a power plant equipment maintenance device provided by the present invention.

[0026] Figure 6This is a schematic diagram of the structure connecting the rotating cylinder, lead screw, and transmission shaft in a maintenance device for power plant equipment provided by the present invention.

[0027] Figure 7 This is a schematic diagram of the structure of a drive roller in a power plant equipment maintenance device provided by the present invention.

[0028] Figure 8 This is a partial structural diagram of a parking mechanism in a power plant equipment maintenance device provided by the present invention.

[0029] Figure 9 This is a partial structural schematic diagram of the parking mechanism in this invention.

[0030] Figure 10 This is a schematic diagram of the clutch assembly in this invention.

[0031] Figure 11 This is a schematic diagram of the structure of the mounting plate in its initial position in this invention.

[0032] Figure 12 This is a schematic diagram of the structure when the mounting plate is located on the initial side of the water-cooled wall in this invention.

[0033] Figure 13 This is a schematic diagram of the structure when the mounting plate is located on the other side of the water-cooled wall in this invention.

[0034] Figure 14 This is a schematic diagram of the constant pressure supply system in this invention. Detailed Implementation

[0035] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] This invention provides a maintenance device for power plant equipment, referenced. Figures 1-6 As one specific implementation method, it includes:

[0039] Lifting platform 1;

[0040] The rotating frame 2 is rotatably mounted above the lifting platform 1 via a vertical rotating shaft 21;

[0041] The detection device is mounted on the rotating frame 2 and includes four detection units 3 evenly spaced around the rotating frame 2.

[0042] The driving device 5 is disposed between the lifting platform and the rotating frame, and is used to drive the four detection units 3 and the four virtual vertical planes that correspond to each other to reciprocate at least in the horizontal direction, and the four virtual vertical planes enclose a cylindrical channel with a rectangular cross-section.

[0043] Specifically, the cross-section of the water-cooled wall 9 inside the boiler is mostly rectangular. In use, a lifting platform is placed inside the boiler, with the vertical rotating shaft 21 positioned at the center. Four detection units are positioned near the four sides of the water-cooled wall 9. The lifting platform 1 is then controlled to move vertically. After the platform rises to a certain height, the drive device 5 activates, driving the four detection units to move horizontally. Simultaneously, the detection units 3 begin their inspection, inspecting the four water-cooled wall 9 sides at the same height as the detection units. After inspection, the lifting platform rises again, and the drive device drives the four detection units to move horizontally again. This process is repeated to complete a comprehensive inspection of the water-cooled wall 9. The detection units 3 can utilize commonly used detection devices such as ultrasonic testing. This method allows for automatic, layer-by-layer inspection of the water-cooled wall 9, reducing worker workload and preventing missed inspections. The lifting platform 1 can be a platform driven by a winch, as described in existing technology. (See reference for more details.) Figure 1 , Figure 2 The lifting platform 1 may include a horizontally arranged rigid frame 11, four pneumatic telescopic rods 12 evenly spaced around the vertical pivot on the side of the rigid frame 11, and drive rollers 13 at the ends of the pneumatic telescopic rods 12. Specifically, the rigid frame 11 can be a rigid frame body with a plate-like profile formed by combining pipes. The pneumatic telescopic rods 12 are detachably connected to the rigid frame 11. In this way, it is convenient to transport the lifting platform 1 from outside the boiler to inside the boiler. The drive rollers 13 can be electrically driven. The specific structure is described below. In use, the four pneumatic telescopic rods can be connected to a constant pressure air source through air supply pipes (not shown). The constant pressure air source supplies stable gas to the four pneumatic telescopic rods 12, causing the four pneumatic telescopic rods to extend and thus contact the four drive rollers with the inner wall of the boiler. Then, the drive rollers 13 rotate to drive the lifting platform to rise and fall. The constant pressure air source ensures that the force provided by the four pneumatic telescopic rods is equal, so that the pressure of the four rollers with the inner wall of the boiler is similar and the force is uniform, which is conducive to the smooth lifting and falling of the lifting platform.

[0044] As a specific implementation method, refer to Figure 14The constant pressure air source 15 has the following specific structure: it includes a rigid cavity 152, an air pump 151 communicating with the rigid cavity 152, and a pressure regulating unit 153 disposed on the side wall of the rigid cavity 152. The rigid cavity is also provided with an air outlet 1521 for supplying air to the telescopic cylinder. The regulating unit 153 includes an regulating piston cavity 1531 disposed on the side wall of the rigid cavity, a linear drive rod 1532 disposed at the opening of the regulating piston cavity 1531, an regulating piston plate 1533 movably disposed in the regulating piston cavity 1531, and a detection device for detecting the pressure inside the rigid cavity. 1534. In use, gas is supplied to the rigid cavity by an air pump, and the air pressure inside the rigid cavity gradually increases. The detection device 1534 detects the air pressure inside the rigid cavity. When the internal air pressure exceeds the preset pressure P, the air pump is controlled to stop working for a preset time T1. Then the air pump is controlled to work again. When the air pressure inside the rigid cavity exceeds the preset pressure P1 again, the air pump is controlled to stop working for a preset time T again, thus repeating the above operation to achieve the purpose of providing air pressure within a constant range for multiple pneumatic telescopic rods. The time T is determined by the following formula: T = (P + P0 / P - P0). 1 / 2 *φ*&1+t, where P0 is standard atmospheric pressure, φ is the rated pumping flow rate of the air pump, &1 is the leakage constant of the four pneumatic telescopic rods 12, representing the ratio of the volume of gas leaking at standard atmospheric pressure per unit time to the internal volume of the pneumatic telescopic rod when a pressure of P2 is introduced into it, and t is a time constant, t=0.2 milliseconds. This method allows for the supply of gas with a constant pressure range to the pneumatic telescopic rods. It is understandable that adjusting the pressure by controlling the on / off state of the air pump has a certain lag, causing excessive pressure fluctuations within the rigid cavity, which can be directly reflected in the intake of the rigid cavity. The pressure at the inlet and outlet is different. To mitigate this, a preferred embodiment can be implemented by simultaneously installing air pressure detection devices at both the inlet and outlet to monitor the water pressure at both locations. During the pump's start-stop period T, when the outlet pressure is greater than the inlet pressure, the linear actuator drives the adjusting piston a certain distance away from the rigid cavity. Conversely, when the outlet pressure is less than the inlet pressure, the linear actuator drives the adjusting piston a certain distance H closer to the rigid cavity. The unit is millimeters. This achieves a fine-tuning effect on the air pressure, helping to reduce pressure fluctuations within the rigid cavity. Where |P 差 | represents the absolute value of the difference between the outlet pressure and the inlet pressure, S is the transverse area of ​​the regulating piston chamber in square millimeters, and V is the volume of the rigid chamber in cubic millimeters. Then H = &2(|P 差 | -2 *S / V), &2 is the second adjustment coefficient, with a value range of 0.73-1.43.

[0045] Furthermore, as a preferred embodiment, the pneumatic telescopic rod 12 is a double-rod cylinder.

[0046] Furthermore, as a specific implementation method, refer to Figures 1-6 The driving device 5 includes a drive shaft 51 coaxially arranged with the vertical rotating shaft 21, four first power telescopic rods 52 arranged on the rotating frame 2 corresponding one-to-one with the four detection units 3, and a mounting plate 53 vertically arranged at the end of the first power telescopic rods 52. The drive shaft 51 is drivenly connected to the rotating frame 2. The four first power telescopic rods 52 are all horizontally arranged. The mounting plate 53 is rotatably connected to the first power telescopic rods 52 through a vertical pin 530. The detection unit 3 is arranged on the side of the mounting plate 53 away from the first power telescopic rods 52. The driving device 5 also includes a drive motor 54 arranged between the first power telescopic rods and the mounting plate for driving the mounting plate to rotate around the vertical pin 530.

[0047] Specifically, each detection unit may include at least one ultrasonic or radar detection device mounted on the mounting plate 53. During operation, the drive shaft 51 rotates, thereby driving the rotating frame 2 to rotate. The rotating frame can drive the first power telescopic rod 52 to rotate around the drive shaft 51, thereby causing the mounting plate 53 to rotate horizontally. At this time, the detection unit 3 can detect the thickness of the pipes in the water-cooled wall 9, thus achieving the detection of the water-cooled wall 9. The detection information from the detection unit can also obtain the distance and angle between the surface of the mounting plate 53 and the water-cooled wall 9. The drive motor 54 and the first power telescopic rod are connected to the corresponding detection unit 3 to obtain the data from the mounting plate 53. During the movement, the distance from the water-cooled wall 9 and the angle between them are adjusted to control the length of the first power telescopic rod and the rotation of the drive motor 54. By adjusting these parameters, the mounting plate 53 and the water-cooled wall 9 to be tested are kept parallel and at the same distance. Thus, the rotation of the drive shaft 51, the extension and retraction of the first power telescopic rod, and the adjustment of the angle of the drive motor 54 achieve the effect of preventing the mounting plate from moving horizontally along the water-cooled wall 9, thereby enabling the detection unit 3 to detect the water-cooled wall 9. The first power telescopic rod can be an electric telescopic rod.

[0048] Example 2

[0049] This invention provides a maintenance device for power plant equipment. As a specific embodiment, its difference from Embodiment 1 lies in that, with reference to… Figure 5The mounting plate 53 includes a guide plate 53a rotatably connected to the first power telescopic rod and a sliding plate 53b that slides and guides the guide plate 53a in the vertical direction. A lead screw 532 is also provided on the guide plate along the guiding direction. A lead screw nut 533 is threaded onto the lead screw 532. The sliding plate 53b is connected to the lead screw nut 533. The lead screw 532 is connected to the driving device 5. The driving device 5 is also used to drive the lead screw 532 to reciprocate to drive the sliding plate 53b to reciprocate in the vertical direction. The detection unit 3 is disposed on the sliding plate 53b.

[0050] Specifically, it is understood that in one embodiment, the water-cooled wall 9 is detected only by driving the detection unit 3 to move horizontally. In the vertical direction, only the area covered by the detection unit can be detected at a time. This method has a limited detection range at one time and requires the lifting platform to move up and down repeatedly. However, due to the limited lifting accuracy of the lifting platform, the detection efficiency is low. To address this problem, as a preferred embodiment, the mounting plate 53 is set as a guide plate and a sliding plate with a guide sliding fit, and the two are driven and connected by a lead screw and a lead screw nut. The lead screw is connected to the driving device 5. With this setting, the driving device can drive the detection unit to move in a combination of horizontal and vertical directions. After moving a certain distance in the horizontal direction, the mounting plate is then driven to move in the vertical direction, and then it moves in the horizontal direction again, thereby increasing the detection range at one time and eliminating the need for the lifting platform to move up and down frequently.

[0051] Furthermore, as a specific implementation method, refer to Figures 4-6 The connection between the drive device and the lead screw is as follows: the drive device 5 also includes four transmission shafts 55 that are arranged one-to-one with the four first power telescopic rods. One end of the four transmission shafts 55 is driven to the drive shaft 51, and the other end is driven to the lead screw 532.

[0052] Further, refer to Figure 4 The drive device 5 further includes four first locking members 56 disposed between the rotating frame 2 and the four drive shafts 55, a second locking member 57 disposed between the rotating frame 2 and the lifting platform 1, and a control unit for controlling the alternating operation of the first locking members 56 and the second locking members 57. When the first locking members 56 are working, they can lock the drive shafts 55 to restrict their rotation. When the second locking members 57 are working, they can lock the rotating frame 2 and the lifting platform together, restricting relative rotation between the rotating frame 2 and the lifting platform. Specifically, refer to... Figure 4The first locking element 56 and the second locking element 57 work on similar principles, both including a friction block and a pneumatic push rod. When they are not locked, the pneumatic push rod is in a retracted state, which separates the friction block from the surface of the object to be locked. When locking is required, the pneumatic push rod is controlled to extend and push the friction block to contact the object to be locked, thereby restricting the object to be locked and preventing it from rotating.

[0053] Further, refer to Figure 4 A connecting cylinder 22 is arranged around and coaxially with the drive shaft 51 on the rotating frame 2. The connecting cylinder 22 is provided with through holes corresponding to the four drive shafts. The end of the drive shaft 55 that extends into the connecting cylinder 22 is provided with a first bevel gear 551. The end of the drive shaft 51 is provided with a second bevel gear 510 that is connected to the four first bevel gears 551.

[0054] For details, please refer to Figures 11-13 The working steps of the drive device 5 driving the detection unit to detect the water-cooled wall 9 are as follows: Step 1, refer to Figure 11 This is an initial structural diagram of the maintenance device. At this time, the first locking element 56 is locked, the second locking element 57 is released, and the detection unit 3 is controlled to work. The drive shaft 51 rotates counterclockwise. Since the transmission shaft 51 is locked and cannot rotate at this time, the drive shaft 51 can drive the rotating frame 2 to rotate around the drive shaft 51 until it rotates to the desired position. Figure 12 The drive shaft stops rotating at the initial side position of the water-cooled wall 9 shown.

[0055] Step 2: Control the switching of the first locking member 56 and the second locking member, so that the first locking member is in the released state and the second locking member is in the locked state. Then control the drive shaft 51 to continue to rotate counterclockwise. Since the rotating frame is locked together with the lifting platform and cannot rotate at this time, while the transmission shaft is released, the drive shaft can drive the transmission shaft 55 to rotate through the second bevel gear. The transmission shaft drives the lead screw 532 to rotate, drives the lead screw nut 533 to move vertically upward, and the lead screw nut drives the movable plate 53b to move vertically upward, driving the detection unit 3 to move upward to perform detection, until the movable plate 53b is driven to the maximum upward stroke and the drive shaft 51 stops rotating.

[0056] Step 3: Control the first locking member 56 and the second locking member to switch again, so that the first locking member 56 is locked and the second locking member 57 is released. Then control the drive shaft 51 to rotate clockwise, driving the rotating frame 2 to rotate. At this time, the first power telescopic rod and the drive motor 54 work together to maintain the relative position of the mounting plate and the water-cooled wall 9. After the drive shaft rotates a certain angle, the distance that the mounting plate moves in the horizontal direction is equal to the width value of the detection range of the detection unit.

[0057] Step 4: Control the first locking member 56 and the second locking member to switch again, so that the first locking member is in the released state and the second locking member is in the locked state. Then control the drive shaft 51 to continue to rotate clockwise. The drive shaft drives the lead screw 532 to rotate, drives the lead screw nut 533 to move vertically downward, and the lead screw nut drives the movable plate 53b to move vertically upward, driving the detection unit 3 to move upward to perform detection, until the movable plate 53b is driven to the initial height and the drive shaft 51 stops rotating.

[0058] Step 5: Repeat steps 3 and 4 until the mounting plate moves to the desired position. Figure 13 The location of the other side of water-cooled wall 9;

[0059] Step 6: Control the lifting platform to rise, the height of which is equal to the stroke of the lead screw driving the lead screw nut.

[0060] Step 7: Repeat steps 2 to 6, and adjust the rotation direction of the drive shaft accordingly, so that the mounting plate moves from the other side of the water-cooled wall 9 to the initial side position. Repeat this process until the top of the water-cooled wall 9 is reached, thus completing the inspection of the water-cooled wall 9.

[0061] Step 8: Lower the lifting platform and disassemble the various components.

[0062] Furthermore, as a specific implementation method, refer to Figure 6 The lead screw 532 is coaxially arranged with the corresponding vertical pin 530. A rotating cylinder 534 is sleeved on the lead screw 532. A third bevel gear 552 is provided at the end of the transmission shaft 55 that extends into the rotating cylinder. A fourth bevel gear 5321 adapted to the third bevel gear 552 is provided on the lead screw 532. The third bevel gear is in a limiting fit with the inner sidewall of the rotating cylinder. The transmission shaft is a telescopic shaft. (Refer to...) Figure 6 The lead screw 532 includes a spline section 532a and a lead screw section 532b. A rotating cylinder 534 is sleeved around the spline section and rotates with it. A third bevel gear is sleeved on the spline section. The rotating cylinder 534 forms a limiting surface below the third bevel gear. A transmission rod 55 is located on the side of the third bevel gear away from the limiting surface. A fourth bevel gear is located at the end of the transmission rod 55 and axially limits the transmission rod. The fourth bevel gear is limited by the side wall of the rotating sleeve, so that the transmission shaft can be stretched or shortened when the first power telescopic rod is extended or shortened. The fourth bevel gear and the limiting surface limit the third bevel gear.

[0063] Furthermore, as a specific implementation method, refer to Figure 3 , Figure 4The rotating frame 2 includes a rotating plate 2a that is parallel to and rotatably coupled with the lifting platform, and a support ring 2b that is disposed on the upper surface of the rotating plate and coaxial with the vertical rotating shaft 21. The support ring 2b is provided with a support hole that is adapted to the first power telescopic rod and the transmission shaft. The end of the first power telescopic rod is detachably connected to the connecting cylinder 22. Specifically, in order to facilitate disassembly and installation, the movable plate 2a can also be formed by overlapping steel structural components, and the support ring 2b can be formed by overlapping multiple arc-shaped components end to end. By setting the support ring, the transmission shaft and the first power telescopic rod can be supported, ensuring the rigidity of the overall structure. As a specific implementation, the first locking component 56 is disposed on the support ring.

[0064] Example 3

[0065] This invention provides a maintenance device for power plant equipment, referenced. Figures 7-10 The difference between this embodiment and Embodiment 2 is that the lifting platform includes a drive roller 13, a support frame 121 at the end of the pneumatic telescopic rod 12, and the drive roller 13 includes a roller shaft 131 rotatably mounted on the support frame 121, a driven gear 1310 mounted on the end of the roller shaft, and a roller 130 mounted on the roller shaft 131. The driven gear is driven and connected to the output shaft of the drive motor 132, thereby enabling the drive motor 132 to drive the roller 130 to rotate. A parking mechanism is also provided between the support frame 121 and the roller shaft 131. The parking mechanism is used to lock the roller shaft 131 when the drive motor 132 stops working, thereby stopping the lifting platform.

[0066] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A maintenance device for power plant equipment, characterized in that, include: Lifting platform (1); The rotating frame (2) is rotatably mounted above the lifting platform (1) via a vertical rotating shaft (21); The detection device is mounted on the rotating frame (2) and includes four detection units (3) evenly spaced around the rotating frame (2). The driving device (5) is located between the lifting platform and the rotating frame, and is used to drive the four detection units (3) and the four virtual vertical planes corresponding to each other to reciprocate at least in the horizontal direction, and the four virtual vertical planes enclose a cylindrical channel with a rectangular cross-section. The driving device (5) includes a driving shaft (51) coaxially arranged with the vertical rotating shaft (21), four first power telescopic rods (52) arranged on the rotating frame (2) corresponding to the four detection units (3), and a mounting plate (53) vertically arranged at the end of the first power telescopic rods (52). The driving shaft (51) is drivenly connected to the rotating frame (2). The four first power telescopic rods (52) are all horizontally arranged. The mounting plate (53) is rotatably connected to the first power telescopic rods (52) through a vertical pin (530). The detection unit (3) is arranged on the side of the mounting plate (53) away from the first power telescopic rods (52). The driving device (5) also includes a driving motor (54) arranged between the first power telescopic rods and the mounting plate for driving the mounting plate to reciprocate around the vertical pin (530). The mounting plate (53) includes a guide plate (53a) rotatably connected to the first power telescopic rod and a sliding plate (53b) slidingly guided and cooperated with the guide plate (53a) in the vertical direction. A lead screw (532) is also provided on the guide plate along the guiding direction. A lead screw nut (533) is threaded onto the lead screw (532). The sliding plate (53b) is connected to the lead screw nut (533). The lead screw (532) is connected to the driving device (5). The driving device (5) is also used to drive the lead screw (532) to reciprocate to drive the sliding plate (53b) to reciprocate in the vertical direction. The detection unit (3) is disposed on the sliding plate (53b).

2. The maintenance device for power plant equipment according to claim 1, characterized in that, The drive device (5) further includes four drive shafts (55) that are arranged one-to-one with the four first power telescopic rods. One end of the four drive shafts (55) is driven to the drive shaft (51), and the other end is driven to the lead screw (532).

3. The maintenance device for power plant equipment according to claim 2, characterized in that, The drive device (5) further includes four first locking members (56) disposed between the rotating frame (2) and the four drive shafts (55), a second locking member (57) disposed between the rotating frame (2) and the lifting platform (1), and a control unit for controlling the first locking member (56) and the second locking member (57) to work alternately. When the first locking member (56) is working, it can lock the drive shaft (55) to restrict its rotation. When the second locking member (57) is working, it can lock the rotating frame (2) and the lifting platform to connect, restricting the relative rotation of the rotating frame (2) and the lifting platform.

4. The maintenance device for power plant equipment according to claim 3, characterized in that, A connecting cylinder (22) is provided on the rotating frame (2) around the drive shaft (51) and coaxial with the drive shaft (51). The connecting cylinder (22) is provided with through holes corresponding to the four drive shafts. The end of the drive shaft (55) that extends into the connecting cylinder (22) is provided with a first bevel gear (551). The end of the drive shaft (51) is provided with a second bevel gear (510) that is connected to the four first bevel gears (551).

5. A maintenance device for power plant equipment according to claim 4, characterized in that, The lead screw (532) is coaxially arranged with the corresponding vertical pin shaft. A rotating cylinder (534) is sleeved on the lead screw (532). A third bevel gear (552) is provided at the end of the transmission shaft (55) that extends into the rotating cylinder. A fourth bevel gear (5321) that is adapted to the third bevel gear (552) is provided on the lead screw (532). The third bevel gear is limited to the inner side wall of the rotating cylinder. The transmission shaft is a telescopic shaft.

6. A maintenance device for power plant equipment according to claim 5, characterized in that, The rotating frame (2) includes a rotating plate (2a) that is parallel to and rotatably coupled with the lifting platform, and a support ring (2b) that is disposed on the upper surface of the rotating plate and coaxial with the vertical rotating shaft (21). The support ring (2b) is provided with a support hole that is adapted to the first power telescopic rod and the transmission shaft. The end of the first power telescopic rod is detachably connected to the connecting cylinder (22).

7. A maintenance device for power plant equipment according to claim 6, characterized in that, The lifting platform (1) includes a horizontally arranged rigid plate (11), four pneumatic telescopic rods (12) evenly spaced around the vertical rotating shaft on the side of the rigid plate (11), and a drive roller (13) at the end of the pneumatic telescopic rods (12).

8. A maintenance device for power plant equipment according to claim 7, characterized in that, The pneumatic telescopic rod (12) is a double-rod cylinder.

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