A large machine type fan tower drum welding quality detection device

Abstract

This invention relates to the field of weld inspection technology, specifically disclosing a welding quality inspection device for large-scale wind turbine towers. The device includes a support, a lifting mechanism mounted on the side wall of the support, and a crossbar mounted on the lifting end of the lifting mechanism. The bottom of the crossbar provides space for placing tower sections, allowing the inner wall of the tower section to fit over the side wall of the crossbar. The bottom of the crossbar houses an inspection mechanism and spaced-apart support mechanisms. This invention divides the entire wind turbine tower into several sections for inspection, and then welds the tower sections after inspection. This allows for the inspection of the welds of the entire wind turbine tower without requiring the crossbar to exceed the length of the entire wind turbine tower. This facilitates inspection without occupying a large space, making it convenient for practical use. Before inspection, the weld can be cleaned, reducing secondary contamination of other parts of the weld by debris during cleaning and preventing residual dirt from affecting the accuracy of the inspection.

Description

Technical Field

[0001] This invention relates to the field of weld inspection technology, specifically to a welding quality inspection device for large-scale wind turbine towers. Background Technology

[0002] The steel plates used for the wind turbine tower are rolled into a cylindrical shape and longitudinally welded to form the individual wind turbine tower units. The individual wind turbine tower units are then circumferentially welded to form tower sections. After the welds are completed and left to stand for a period of time, the circumferential welds need to be inspected to determine the quality of the welded parts and to avoid affecting the stability of subsequent actual use due to incomplete welding or weld cracks. After the inspection is completed, the tower sections are welded together as a whole to complete the forming of the entire wind turbine tower.

[0003] CN117825511B discloses an adjustable welding wind turbine tower quality inspection device. The problem raised in the background art is that the existing large wind turbine tower welding inspection device cannot perform flaw detection on the internal structure of the weld, the quality inspection range is limited, and it is not convenient to use for wind turbine tower quality inspection.

[0004] Based on existing technologies, the following problems exist: Due to the thick walls of large wind turbine towers, it is necessary to inspect the welds on both the inner and outer sides after welding. Existing welding quality inspection devices for large wind turbine towers are not convenient for inspecting welds from the inner wall of the tower. Referring to the aforementioned application documents, although a mechanism capable of rotating inside the wind turbine tower is used for weld inspection, the large diameter of the tower results in a large device that is not easy to install inside the tower. Furthermore, since the wind turbine tower is composed of multiple welded sections, multiple inspections are required, and frequent disassembly and reassembly are cumbersome. Disassembly and relocation inside the tower are also very inconvenient, affecting the efficiency of actual inspection. Therefore, a welding quality inspection device for large wind turbine towers is proposed to solve these problems. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding quality inspection device for large-scale wind turbine towers, comprising spaced-apart slide rails, a transfer trolley mounted on the sliding end of the slide rails, and a tower section mounted on top of the transfer trolley. The tower section is welded from multiple individual wind turbine tower units, with weld seams formed at the welded joints of the individual tower units. The device also includes a support mounted on the inner side of the slide rails, a lifting mechanism mounted on the side wall of the support, and a crossbar mounted on the lifting end of the lifting mechanism. The bottom of the crossbar provides space for placing the tower section, allowing the inner wall of the tower section to fit over the side wall of the crossbar. The bottom of the crossbar is provided with an inspection mechanism and spaced-apart support mechanisms. The support mechanisms support the crossbar without affecting the placement of the tower section over the crossbar. The support mechanisms include: The cylinder body is fixed at the bottom of the crossbar and extends to the top of the crossbar. The inner wall of the cylinder body is fitted with a piston block and a piston rod, and the bottom of the piston rod extends to the bottom of the cylinder body. A cleaning mechanism for cleaning the weld is provided on the side wall of the piston rod at the bottom of the cylinder body. The abutment plate is hinged to the bottom of the crossbar. The side wall of the abutment plate is provided with a hinge seat that is hinged to the piston rod. The bottom of the abutment plate is provided with a mounting groove, and an auxiliary component is provided inside the mounting groove.

[0006] Furthermore, the support mechanism also includes: The conduit is fixedly installed on the upper end of the inner wall of the cylinder and extends to the outside of the cylinder. The conduit can connect to the cylinder of multiple support mechanisms arranged at intervals. A valve body is provided at each position of the conduit between the cylinders to control the air delivery of a single support mechanism. The pressure relief pipe is fixedly installed on the outer wall of the conduit, and a pressure relief valve is installed on the outer wall of the pressure relief pipe.

[0007] Furthermore, the support mechanism also includes: The first sealing ring is fixedly sleeved on the lower end of the inner wall of the cylinder body. The second sealing ring is fixedly sleeved on the side wall of the piston block. The first sealing ring and the second sealing ring are arranged at intervals. The side wall diameter of the piston block is larger than the side wall diameter of the piston rod to restrict the piston rod from detaching from the cylinder body. The first slide groove is formed on the side wall of the backing plate, and the first slider is placed inside the first slide groove. The top of the first slider is fixedly connected to the bottom of the hinge seat.

[0008] Furthermore, the auxiliary component includes: The rotating rod is rotatably mounted on the inner wall of the mounting groove, and both ends extend to the outside of the abutment plate. An angle sensor is fixedly mounted on the end of the rotating rod outside the abutment plate, and a ball seat is fixedly sleeved on the side wall of the end of the rotating rod inside the mounting groove. A universal ball is sleeved on the bottom of the ball seat. The first servo motor is fixedly mounted on the outside of the support plate, and the output shaft of the first servo motor is fixedly connected to the other end of the rotating rod located outside the support plate via a coupling.

[0009] Furthermore, the cleaning mechanism is only located on the outside of the support mechanism at the end of the crossbar furthest from the upright, and the cleaning mechanism includes: The connector is fixedly sleeved on the lower end of the side wall of the piston rod and is designed in a bent shape. The vertical section of the connector is fixedly sleeved with a connecting plate, and the connecting plates are symmetrically arranged with respect to the center point of the connector. The bottom of the connector is fixedly equipped with a guide plate. The guide rod is fitted onto the top of the connecting plate and passes through the connecting plate and the guide plate. A baffle is installed at the bottom end of the guide rod, which is arc-shaped to fit against the inner wall of the wind turbine tower. A guide hole is opened at the bottom of the guide plate, extending to the top of the connecting plate, for fitting the guide rod.

[0010] Furthermore, the cleaning mechanism also includes: A retaining ring is fixedly sleeved on the side wall of the guide rod located between the connecting plate and the guide plate. A spring is sleeved on the side wall of the guide rod, and the spring is located between the retaining ring and the connecting plate. The suction nozzles are fixedly installed on the side of the baffle away from the bottom plate and are arranged at intervals. The baffle has water guide grooves inside, and the bottom inner walls of the water guide grooves are connected to the suction nozzles. The top inner walls of the water guide grooves are close to the center of the baffle and are interconnected. The water guide pipe is installed on the top of the baffle and extends into the baffle. The water guide pipe is connected to the water guide channel. The section of the water guide pipe near the connector is designed as a flexible hose and is reserved with a length that can move vertically with the baffle.

[0011] Furthermore, the testing institution includes: An electric push rod is fixedly installed at the bottom of the crossbar. A mounting base is fixedly installed at the bottom of the electric push rod telescopic shaft. A second industrial camera and a first industrial camera are fixedly installed at the bottom of the mounting base. A cleaning mechanism is provided on the side wall of the electric push rod telescopic shaft. The fixing component is fixedly installed at the bottom of the crossbar and has a bent design. The bottom of the fixing component is fixedly sleeved on the lower end of the side wall of the electric push rod to support the electric push rod.

[0012] Furthermore, the cleaning mechanism includes: A protective plate is fixedly sleeved on the side wall of the electric push rod telescopic shaft. A first nozzle and a second nozzle are fixedly provided at the bottom of the protective plate. A first tube and a second tube are fixedly provided at the top of the first nozzle and the second nozzle, respectively, so as to deliver gas and cleaning liquid into the first nozzle and the second nozzle, respectively.

[0013] Furthermore, the cleaning mechanism also includes: A baffle is fixedly installed at the bottom of the protective plate and located between the first nozzle and the mounting base. The bottom of the baffle is level with the bottom of the mounting base so that the bottom of the second industrial camera is below the bottom of the baffle. The bottoms of the first nozzle and the second nozzle are both higher than the bottom of the baffle. The ends of the first tube and the second tube near the protective plate are both designed as flexible hoses and are reserved with lengths that can be raised and lowered with the protective plate.

[0014] Furthermore, the lifting mechanism includes: The second slide is formed on the side wall of the stand, and the second slide contains a second slider, which is fixedly connected to the end of the crossbar. A threaded rod is rotatably mounted on the top of the stand and extends into the second slide groove. The side wall of the threaded rod located in the second slide groove is threadedly connected to the second slider. A second servo motor is fixedly mounted on the top of the stand, and the output shaft of the second servo motor is fixedly connected to the top of the threaded rod through a coupling.

[0015] This invention provides a welding quality inspection device for large-scale wind turbine towers. Compared with existing technologies, it has the following advantages: 1. This invention divides the entire wind turbine tower into several tower sections for inspection. After the inspection is completed, the tower sections are welded together. This allows for the inspection of the welds of the entire wind turbine tower without requiring the length of the crossbar to exceed the length of the entire wind turbine tower. This facilitates inspection without occupying a large space, making it convenient for actual inspection. Before inspection, the welds can be cleaned, reducing secondary contamination of other parts of the weld by debris during the cleaning process, improving the cleaning effect, and avoiding the impact of dirt residue on the accuracy of the inspection.

[0016] 2. The present invention provides support for the end of the crossbar away from the support base by having the support mechanism sleeved on the side wall of the tower section before and after the support mechanism is installed. The bottom of the support mechanism contacts and abuts against the ground and the bottom inner wall of the tower section, thereby ensuring the stability of the crossbar and not affecting the use of weld inspection, so as to facilitate automatic weld inspection.

[0017] 3. The present invention uses the reverse force of gas to make the bottom of the abutment plate press tightly against the bottom inner wall of the tower section, so as not to affect the tower section being fitted onto the side wall of the crossbar, nor to affect the support of the crossbar, which facilitates actual testing and improves the stability of the test. By performing a weld inspection on a tower section, some support structures are located inside the tower section, while others are located outside the tower section, so that they are respectively pressed against the bottom of the inner wall of the tower section and the ground, thereby ensuring the stability of the crossbar and meeting the inspection requirements.

[0018] 4. The present invention facilitates the vertical movement of the entire crossbar by means of the adjustment mechanism and the support mechanism, so as to adjust the height of the crossbar. Furthermore, since the support plate of the support mechanism supports the crossbar by means of hinged rotation, it does not affect the tower section being sleeved on the side wall of the crossbar, thereby further expanding the scope of application.

[0019] 5. The present invention uses a cleaning mechanism to first spray cleaning liquid and then perform high-pressure gas purging, which reduces the diffusion of debris and prevents debris and other impurities from spreading to other places after purging, thereby reducing secondary contamination of other parts of the weld by debris and improving the cleaning effect. The cleaning mechanism's baffle is attached to the top of the inner wall of the tower section, thus blocking the cleaning liquid. Due to the properties of the liquid, the cleaning liquid always remains at the bottom of the inner wall of the tower section, ensuring the baffle's blocking effect. The cleaning liquid is then extracted through a suction nozzle, a water guide channel, and a water guide pipe, facilitating long-term use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the longitudinal cross-sectional structure of the tower section of the present invention; Figure 3 This is a schematic diagram of the crossbar, support mechanism, cleaning mechanism, detection mechanism, and cleaning mechanism of the present invention. Figure 4 This is a schematic diagram of the supporting mechanism, cleaning mechanism, detection mechanism, and purging mechanism of the present invention; Figure 5 This is a schematic diagram of the longitudinal cross-sectional structure of the crossbar of the present invention; Figure 6 This is a schematic diagram of the support mechanism and cleaning mechanism of the present invention; Figure 7 This is a schematic diagram of the support mechanism structure of the present invention; Figure 8 For the present invention Figure 7 A magnified structural diagram of A in the middle; Figure 9 This is an exploded view of the auxiliary component of the present invention; Figure 10 This is a schematic diagram of the ball seat and universal ball structure of the present invention; Figure 11 This is a schematic diagram of the cleaning mechanism structure of the present invention; Figure 12 This is a schematic diagram of the lifting mechanism structure of the present invention; Figure 13 This is a schematic diagram of the detection mechanism and cleaning mechanism of the present invention; Figure 14 This is a schematic diagram of the tower section detection structure of the present invention.

[0021] The reference numerals in the above figures are as follows: 1. Stand; 2. Crossbar; 3. Lifting mechanism; 4. Weld; 5. Tower section; 6. Slide rail; 7. Transfer vehicle; 8. Support mechanism; 9. Cleaning mechanism; 10. Blowing mechanism; 11. Inspection mechanism; 31. Second servo motor; 32. Threaded rod; 33. Second slide rail; 81. Cylinder body; 82. Backing plate; 83. First slide groove; 84. Hinge seat; 85. Auxiliary component; 86. Mounting groove; 87. Piston rod; 88. First sealing ring; 89. Second sealing ring; 891. Valve body; 892. Conduit; 893. Pressure relief pipe; 894. Pressure relief valve; 851. Ball mount; 852. First servo motor; 853. Rotary rod; 854. Angle sensor; 855. Universal ball; 91. Baffle; 92. Guide plate; 93. Connecting plate; 94. Water guide channel; 95. Suction nozzle; 96. Retaining ring; 97. Guide rod; 98. Connector; 99. Water guide pipe; 101. Second nozzle; 102. Protective plate; 103. First nozzle; 104. Baffle plate; 105. Second tube body; 106. First tube body; 111. Fixture; 112. First industrial camera; 113. Mounting base; 114. Second industrial camera; 115. Electric actuator. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figures 1-5 and Figure 14 A welding quality inspection device for large-scale wind turbine towers includes spaced slide rails 6, a transfer cart 7 mounted on the sliding end of the slide rails 6, and a tower section 5 mounted on top of the transfer cart 7. The tower section 5 is welded from multiple individual wind turbine tower units, and weld seams 4 are formed at the welded joints of the individual wind turbine tower units. It also includes a stand 1 set inside the slide rail 6, a lifting mechanism 3 set on the side wall of the stand 1, and a crossbar 2 set at the lifting end of the lifting mechanism 3. The bottom of the crossbar 2 is left with space for placing the tower section 5 so that the inner wall of the tower section 5 can be fitted outside the side wall of the crossbar 2. The bottom of the crossbar 2 is provided with a detection mechanism 11 and a support mechanism 8 arranged at intervals. The support mechanism 8 is used to support the crossbar 2 and does not affect the tower section 5 being fitted outside the crossbar 2.

[0024] Please see Figures 5-8 Supporting structure 8 includes: The cylinder body 81 is fixedly installed at the bottom of the crossbar 2 and extends to the top of the crossbar 2. The inner wall of the cylinder body 81 is fitted with a piston block and a piston rod 87, and the bottom of the piston rod 87 extends to the bottom of the cylinder body 81. A cleaning mechanism 9 for cleaning the weld 4 is provided on the side wall of the piston rod 87 at the bottom of the cylinder body 81. The abutment plate 82 is hinged to the bottom of the crossbar 2. The side wall of the abutment plate 82 is slidably provided with a hinge seat 84, which is hinged to the piston rod 87. The bottom of the abutment plate 82 is provided with a mounting groove 86, and an auxiliary component 85 is provided inside the mounting groove 86.

[0025] In practice, the transfer vehicle 7 and the slide rail 6 drive the tower section 5 to be fitted onto the outside of the crossbar 2, and the weld 4 is located directly below the inspection mechanism 11. Then, the transfer vehicle 7 drives the tower section 5 to rotate, so that the tower section 5 rotates on the outside of the crossbar 2. During this process, the cleaning mechanism 9 and the blowing mechanism 10 work together to clean the weld 4 of the tower section 5 that is first fitted onto the outside of the crossbar 2. After cleaning, the inspection mechanism 11 inspects the weld 4 to determine the quality of the weld 4. After the inspection of one weld 4 is completed, the transfer vehicle 7 stops rotating and drives the tower section 5 to move closer to the support 1, so as to repeat the above steps to inspect the next weld 4. Thus, the inspection mechanism 11 inspects the circumferential welds 4 one by one, so as to automatically inspect the welds 4 from the inside of the wind turbine tower.

[0026] Because the wind turbine tower is quite long, and to facilitate the inspection of weld seams 4 from inside the tower, the crossbar 2 needs to be quite long. Simply fixing the crossbar 2 from one end using the support 1 is insufficient to guarantee its stability. Therefore, to ensure the stability of the crossbar 2 without affecting the installation of the tower section 5 on the side wall of the crossbar 2, the support mechanism 8 is installed before and after the tower section 5 is installed on the side wall of the crossbar 2. The bottom of the support mechanism 8 contacts and abuts against the ground and the bottom inner wall of the tower section 5, thus supporting the end of the crossbar 2 away from the support 1. This ensures the stability of the crossbar 2 without affecting the inspection of weld seams 4, facilitating automatic weld seam inspection.

[0027] Since the length of a complete wind turbine tower can reach 80-150 meters, and the length of the crossbar 2 is insufficient to inspect the weld seam 4 after the entire wind turbine tower has been welded, the entire wind turbine tower can be divided into several tower sections 5 for inspection. After the inspection is completed, the tower sections 5 are then welded. The inspection after welding tower sections 5 can be performed after completing one welding operation. The length of the wind turbine tower after completing one welding operation is relatively long, and this section is referred to as the first wind turbine tower (for ease of explanation later). Then, a new, inspected tower section 5 is welded to the first wind turbine tower. After welding, the weld seam is inspected. When inspecting weld 4, the newly welded tower section 5 is brought close to the support 1 and moved towards the support 1. At this time, the length of the crossbar 2 only needs to meet the length of the tower section 5 to be inspected, thus enabling the inspection of weld 4. The inspected tower section 5 becomes the second wind turbine tower. This process is repeated to inspect the weld 4 of the entire wind turbine tower without requiring the length of the crossbar 2 to exceed the length of the entire wind turbine tower. This facilitates inspection without occupying a large space, making it convenient for practical use. The number of wind turbine tower units that can be welded together for tower section 5 can be specifically designed based on the length of the wind turbine tower units and the crossbar 2, and is not limited here.

[0028] The support mechanism 8 also includes: The conduit 892 is fixedly installed on the upper end of the inner wall of the cylinder 81 and extends to the outside of the cylinder 81. The conduit 892 can connect to the cylinder 81 of multiple support mechanisms 8 arranged at intervals. A valve body 891 is provided at each position of the conduit 892 between the cylinders 81 to control the air guide of a single support mechanism 8. Pressure relief pipe 893 is fixedly installed on the outer wall of conduit 892, and pressure relief valve 894 is installed on the outer wall of pressure relief pipe 893.

[0029] The support mechanism 8 also includes: The first sealing ring 88 is fixedly sleeved on the lower end of the inner wall of the cylinder 81. The second sealing ring 89 is fixedly sleeved on the side wall of the piston block. The first sealing ring 88 and the second sealing ring 89 are arranged at intervals. The side wall diameter of the piston block is larger than the side wall diameter of the piston rod 87 to restrict the piston rod 87 from detaching from the cylinder 81. The first slide groove 83 is formed on the side wall of the abutment plate 82. The first slider is placed inside the first slide groove 83. The top of the first slider is fixedly connected to the bottom of the hinge seat 84.

[0030] Please see Figures 9-10 The auxiliary component 85 includes: The rotating rod 853 is rotatably mounted on the inner side wall of the mounting groove 86, and both ends extend to the outside of the abutment plate 82. An angle sensor 854 is fixedly mounted on the end of the rotating rod 853 outside the abutment plate 82, and a ball seat 851 is fixedly sleeved on the side wall of the end of the rotating rod 853 inside the mounting groove 86. A universal ball 855 is sleeved on the bottom of the ball seat 851. The first servo motor 852 is fixedly mounted on the outside of the base plate 82. The output shaft of the first servo motor 852 is fixedly connected to the other end of the rotating rod 853 located outside the base plate 82 via a coupling.

[0031] In practical implementation, the tower section 5 is moved closer to the support 1 by the transfer vehicle 7. During the approach, the end of the tower section 5 near the support 1 presses against the abutment plate 82, causing the bottom of the abutment plate 82 to rotate towards the side closer to the support 1, thereby allowing the abutment plate 82 to enter the interior of the tower section 5. During this process, the abutment plate 82 drives the piston rod 87 to move upward through the hinge seat 84. Since the hinge seat 84 can move on the side wall of the abutment plate 82 through the first sliding groove 83 and the first slider, when the abutment plate 82 rotates, it drives the piston rod 87 and the piston block to compress the gas inside the cylinder 81 and move upward. Under the reverse force of the gas inside the cylinder 81, the bottom of the abutment plate 82 is pressed against the bottom inner wall of the tower section 5, thus not affecting the tower section 5 being fitted onto the side wall of the crossbar 2, nor affecting the support of the crossbar 2, which facilitates actual testing and improves the stability of the testing.

[0032] Before the tower section 5 is fitted onto the side wall of the crossbar 2, high-pressure gas is injected into the cylinder 81 through the conduit 892. After the injection is completed, the valve 891 is closed, so that the high-pressure gas is stored in the cylinder 81. At this time, the abutment plate 82 is in the initial position, in contact with the ground, thereby supporting the crossbar 2. When the tower section 5 squeezes the abutment plate 82, the piston rod 87 and the piston block squeeze the high-pressure gas in the cylinder 81, thereby causing the abutment plate 82 to rotate, so that the tower section 5 can be fitted onto the side wall of the crossbar 2. The high-pressure gas is squeezed again, so that it is pressed tightly against the bottom of the inner wall of the tower section 5 to ensure the stability of the crossbar 2 support and to avoid the gas pressure in the cylinder 81 from being too high. After the specified pressure is reached, some gas is discharged through the pressure relief valve 894 and the pressure relief pipe 893 to maintain the stability of the gas pressure in the cylinder 81 for practical use.

[0033] As the tower section 5 completes a weld seam 4 inspection and moves closer to the support 1, the end of the tower section 5 closest to the support 1 presses against the rear abutment plate 82. Based on the above description, the support mechanism 8 is positioned such that part of the support mechanism 8 is inside the tower section 5 and part of the support mechanism 8 is outside the tower section 5, so as to press against the bottom of the inner wall of the tower section 5 and the ground respectively, thereby ensuring the stability of the crossbar 2 to meet the inspection requirements.

[0034] By setting the valve body 891, when the conduit 892 is guiding the gas, the gas can be easily delivered to the cylinder 81 in the support mechanism 8 at the designated position through the valve body 891, which facilitates actual testing and use. In addition, since the crossbar 2 is inserted into the sleeve section, the conduit 892, the first tube 106 and the tube can all be arranged along the crossbar 2, which facilitates actual use.

[0035] Please see Figure 13 The testing mechanism 11 includes: An electric push rod 115 is fixedly installed at the bottom of the crossbar 2. A mounting base 113 is fixedly installed at the bottom of the telescopic shaft of the electric push rod 115. A second industrial camera 114 and a first industrial camera 112 are fixedly installed at the bottom of the mounting base 113. A cleaning mechanism 10 is provided on the side wall of the telescopic shaft of the electric push rod 115. The fixing member 111 is fixedly installed at the bottom of the crossbar 2 and has a bent design. The bottom of the fixing member 111 is fixedly sleeved on the lower end of the side wall of the electric push rod 115 to support the electric push rod 115.

[0036] In practical implementation, when the weld 4 of the tower section 5 is located directly below the inspection mechanism 11, the weld 4 is first cleaned by the cleaning mechanism 9 and the blowing mechanism 10 to avoid impurities and debris affecting the accuracy of subsequent inspections. After cleaning, the telescopic axis of the electric push rod 115 is moved downward, so that the second industrial camera 114 is close to the weld 4. The first industrial camera 112 and the second industrial camera 114 can collect information on the surface of the weld 4 to judge the welding quality of the weld 4, improve the inspection effect, and determine the position of the tower section 5 to the side wall of the crossbar 2, so that the weld 4 is located directly below the second industrial camera 114, which is convenient for actual inspection.

[0037] Please see Figure 12 The lifting mechanism 3 includes: The second slide groove 33 is formed on the side wall of the stand 1. The second slide groove 33 contains a second slider, which is fixedly connected to the end of the crossbar 2. The threaded rod 32 is rotatably mounted on the top of the stand 1 and extends into the second slide groove 33. One end of the threaded rod 32 located in the second slide groove 33 is threadedly connected to the second slider. The top of the stand 1 is fixedly equipped with a second servo motor 31, and the output shaft of the second servo motor 31 is fixedly connected to the top of the threaded rod 32 through a coupling.

[0038] In practical implementation, since the diameter of the wind turbine tower is different, in order to facilitate the inspection of weld seam 4 of wind turbine towers with different diameters, the height of the crossbar 2 is adjusted by the lifting mechanism 3 and the support mechanism 8 to expand the scope of application.

[0039] When adjusting the height of the crossbar 2, the second servo motor 31 drives the threaded rod 32 to rotate, thereby driving the first slider to move along the first slide groove 83 to adjust the height of the crossbar 2. During the adjustment process, the pressure value of the gas in the cylinder 81 is controlled to make the crossbar 2 move downward as a whole under its own weight, so as to adjust the height of the crossbar 2. Furthermore, since the abutment plate 82 of the support mechanism 8 supports the crossbar 2 by hinged rotation, it does not affect the tower section 5 being sleeved on the side wall of the crossbar 2, thereby further expanding the scope of application.

[0040] Example 2: Please refer to Figure 13 The technical difference between this embodiment and Embodiment 1 is that the cleaning mechanism 10 includes: The guard plate 102 is fixedly sleeved on the side wall of the telescopic shaft of the electric push rod 115. The bottom of the guard plate 102 is fixedly provided with a first nozzle 103 and a second nozzle 101. The top of the first nozzle 103 and the second nozzle 101 are respectively fixedly provided with a first tube 106 and a second tube 105 to deliver gas and cleaning liquid into the first nozzle 103 and the second nozzle 101 respectively.

[0041] The cleaning mechanism 10 further includes: A baffle 104 is fixedly mounted on the bottom of a protective plate 102 and located between the first nozzle 103 and the mounting base 113. The bottom of the baffle 104 is level with the bottom of the mounting base 113 so that the bottom of the second industrial camera 114 is below the bottom of the baffle 104. The bottoms of the first nozzle 103 and the second nozzle 101 are both higher than the bottom of the baffle 104. The ends of the first tube 106 and the second tube 105 near the protective plate 102 are both designed as flexible hoses and are reserved with lengths that can be raised and lowered with the protective plate 102.

[0042] In practice, after the tower section 5 is moved to the designated position outside the side wall of the crossbar 2, the gas pipeline and cleaning fluid pipeline are connected to the first pipe body 106 and the second pipe body 105. When the transfer vehicle 7 drives the wind turbine tower to rotate, the cleaning fluid is sprayed onto the weld 4 first. Then, the weld 4 is purged with high-pressure gas to clean it. By spraying the cleaning fluid first and then purging with high-pressure gas, the diffusion of debris is reduced, and debris and other impurities are prevented from spreading to other places after purging. Since the cleaning is carried out inside the tower section 5, the tower section 5 is only open at both ends, and debris is not easy to flow out. Thus, debris and other impurities are wetted before purging, which reduces secondary contamination of other parts of the weld 4 by debris and improves the cleaning effect.

[0043] By using shielding plate 104 to block the gas and cleaning liquid, a large amount of impurities can be accumulated at the second industrial camera 114 after one inspection of tower section 5, which would affect the actual inspection.

[0044] The cleaning mechanism 9 is located only on the outside of the support mechanism 8 at the end of the crossbar 2 away from the stand 1, and the cleaning mechanism 9 includes: The connector 98 is fixedly sleeved on the lower end of the side wall of the piston rod 87 and is designed in a bent shape. The vertical section of the connector 98 is fixedly sleeved with a connecting plate 93, and the connecting plates 93 are symmetrically arranged with respect to the center point of the connector 98. The bottom of the connector 98 is fixedly equipped with a guide plate 92. The guide rod 97 is sleeved on the top of the connecting plate 93 and passes through the connecting plate 93 and the guide plate 92. A baffle 91 is detachably installed at one end of the guide rod 97 at the bottom of the guide plate 92. The baffle 91 is arc-shaped to fit against the inner wall of the wind turbine tower. A guide hole is opened at the bottom of the guide plate 92, extending to the top of the connecting plate 93 and used to sleeve the guide rod 97.

[0045] Please see Figure 11 The cleaning mechanism 9 further includes: A retaining ring 96 is fixedly sleeved on one end of the guide rod 97 located between the connecting plate 93 and the guide plate 92. A spring is sleeved on the side wall of the guide rod 97, and the spring is located between the retaining ring 96 and the connecting plate 93. The suction nozzle 95 is fixedly installed on the side of the baffle 91 away from the abutment plate 82 and is arranged at intervals. The baffle 91 has a water guide groove 94 inside, and the bottom inner wall of the water guide groove 94 is connected to the suction nozzle 95 respectively. The top inner wall of the water guide groove 94 moves towards the center of the baffle 91 and is interconnected. The water guide pipe 99 is installed on the top of the baffle 91 and extends into the baffle 91. The water guide pipe 99 is connected to the water guide channel 94. The section of the water guide pipe 99 near the connector 98 is designed as a flexible hose and is reserved with a length that moves vertically with the baffle 91.

[0046] In specific implementation, after the tower section 5 is fitted outside the side wall of the crossbar 2, the baffle 91 is located on the side of the detection mechanism 11 away from the stand 1, thereby blocking the cleaning liquid and preventing the cleaning liquid from flowing to the undetected weld 4, thus avoiding increasing the difficulty of cleaning the subsequent weld 4. When the cleaning mechanism 9 is operated, the baffle 91 is fitted onto the side wall of the crossbar 2 after being sleeved on the tower section 5, and then fits against the top of the inner wall of the tower section 5, thereby blocking the cleaning liquid. Although the tower section 5 rotates with the transfer vehicle 7, due to the properties of the liquid, the cleaning liquid remains at the bottom of the inner wall of the tower section 5, ensuring the blocking effect of the baffle 91. When a large amount of cleaning liquid is blocked, the external suction pipe is connected through the water guide pipe 99, and the cleaning liquid is extracted through the suction nozzle 95, the water guide trough 94 and the water guide pipe 99, which is convenient for long-term use.

[0047] If jamming occurs when the baffle 91 enters the tower section 5, the operator can assist by pushing the baffle 91 upwards to allow it to enter the tower section 5. During subsequent testing, the baffle 91 can move along the inner wall of the tower section 5, automatically blocking the cleaning liquid. Because the baffle 91 has a certain downward movement space under the action of the spring, it can fit tightly against the bottom of the inner wall of the tower section 5, improving the blocking effect. Furthermore, the height of the baffle 91 can be adaptively adjusted according to the height of the piston rod 87, facilitating actual operation.

[0048] The transfer vehicle 7 in this invention can move the tower section 5 along the slide rail 6 and can also rotate the tower section 5 along the center line of the tower section 5. This is prior art and will not be described in detail here.

[0049] The first servo motor 852 and electric push rod 115 of the present invention are connected to the controller and power supply through wires to facilitate actual control and use. This is prior art and will not be described in detail here.

[0050] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

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

Claims

1. A welding quality inspection device for large-scale wind turbine towers, comprising spaced slide rails, a transfer trolley mounted on the sliding end of the slide rails, and a tower section mounted on top of the transfer trolley, wherein the tower section is welded from multiple individual wind turbine tower units, and the weld joints of the individual wind turbine tower units form weld seams, characterized in that... It also includes a stand installed inside the slide rail, a lifting mechanism installed on the side wall of the stand, and a crossbar installed at the lifting end of the lifting mechanism. The bottom of the crossbar has space for placing the tower section, allowing the inner wall of the tower section to fit over the side wall of the crossbar. The bottom of the crossbar is equipped with a detection mechanism and spaced-apart support mechanisms. The support mechanisms support the crossbar without affecting the fit of the tower section over the crossbar. The support mechanisms include: The cylinder body is fixed at the bottom of the crossbar and extends to the top of the crossbar. The inner wall of the cylinder body is fitted with a piston block and a piston rod, and the bottom of the piston rod extends to the bottom of the cylinder body. A cleaning mechanism for cleaning the weld is provided on the side wall of the piston rod at the bottom of the cylinder body. A stop plate is hinged to the bottom of the crossbar. A hinge seat is slidably provided on the side wall of the stop plate, and the hinge seat is hinged to the piston rod. A mounting groove is provided at the bottom of the stop plate, and an auxiliary component is installed inside the mounting groove. The auxiliary component includes: The rotating rod is rotatably mounted on the inner wall of the mounting groove, and both ends extend to the outside of the abutment plate. An angle sensor is fixedly mounted on the end of the rotating rod outside the abutment plate, and a ball seat is fixedly sleeved on the side wall of the end of the rotating rod inside the mounting groove. A universal ball is sleeved on the bottom of the ball seat. The first servo motor is fixedly mounted on the outside of the support plate, and the output shaft of the first servo motor is fixedly connected to the other end of the rotating rod located outside the support plate via a coupling.

2. The welding quality inspection device for large-scale wind turbine towers according to claim 1, characterized in that, The support mechanism also includes: The conduit is fixedly installed on the upper end of the inner wall of the cylinder and extends to the outside of the cylinder. The conduit can connect to the cylinder of multiple support mechanisms arranged at intervals. A valve body is provided at each position of the conduit between the cylinders to control the air delivery of a single support mechanism. The pressure relief pipe is fixedly installed on the outer wall of the conduit, and a pressure relief valve is installed on the outer wall of the pressure relief pipe.

3. The welding quality inspection device for large-scale wind turbine towers according to claim 1, characterized in that, The support mechanism also includes: The first sealing ring is fixedly sleeved on the lower end of the inner wall of the cylinder body. The second sealing ring is fixedly sleeved on the side wall of the piston block. The first sealing ring and the second sealing ring are arranged at intervals. The side wall diameter of the piston block is larger than the side wall diameter of the piston rod to restrict the piston rod from detaching from the cylinder body. The first slide groove is formed on the side wall of the backing plate, and the first slider is placed inside the first slide groove. The top of the first slider is fixedly connected to the bottom of the hinge seat.

4. The welding quality inspection device for large-scale wind turbine towers according to claim 1, characterized in that, The cleaning mechanism is located only on the outside of the support mechanism at the end of the crossbar furthest from the upright, and the cleaning mechanism includes: The connector is fixedly sleeved on the lower end of the side wall of the piston rod and is designed in a bent shape. The vertical section of the connector is fixedly sleeved with a connecting plate, and the connecting plates are symmetrically arranged with respect to the center point of the connector. The bottom of the connector is fixedly equipped with a guide plate. The guide rod is fitted onto the top of the connecting plate and passes through the connecting plate and the guide plate. A baffle is installed at the bottom end of the guide rod, which is arc-shaped to fit against the inner wall of the wind turbine tower. A guide hole is opened at the bottom of the guide plate, extending to the top of the connecting plate, for fitting the guide rod.

5. The welding quality inspection device for large-scale wind turbine towers according to claim 4, characterized in that, The cleaning mechanism also includes: A retaining ring is fixedly sleeved on the side wall of the guide rod located between the connecting plate and the guide plate. A spring is sleeved on the side wall of the guide rod, and the spring is located between the retaining ring and the connecting plate. The suction nozzles are fixedly installed on the side of the baffle away from the bottom plate and are arranged at intervals. The baffle has water guide grooves inside, and the bottom inner walls of the water guide grooves are connected to the suction nozzles. The top inner walls of the water guide grooves are close to the center of the baffle and are interconnected. The water guide pipe is installed on the top of the baffle and extends into the baffle. The water guide pipe is connected to the water guide channel. The section of the water guide pipe near the connector is designed as a flexible hose and is reserved with a length that can move vertically with the baffle.

6. The welding quality inspection device for large-scale wind turbine towers according to claim 1, characterized in that, The testing institutions include: An electric push rod is fixedly installed at the bottom of the crossbar. A mounting base is fixedly installed at the bottom of the electric push rod telescopic shaft. A second industrial camera and a first industrial camera are fixedly installed at the bottom of the mounting base. A cleaning mechanism is provided on the side wall of the electric push rod telescopic shaft. The fixing component is fixedly installed at the bottom of the crossbar and has a bent design. The bottom of the fixing component is fixedly sleeved on the lower end of the side wall of the electric push rod to support the electric push rod.

7. The welding quality inspection device for large-scale wind turbine towers according to claim 6, characterized in that, The cleaning mechanism includes: A protective plate is fixedly sleeved on the side wall of the electric push rod telescopic shaft. A first nozzle and a second nozzle are fixedly provided at the bottom of the protective plate. A first tube and a second tube are fixedly provided at the top of the first nozzle and the second nozzle, respectively, so as to deliver gas and cleaning liquid into the first nozzle and the second nozzle, respectively.

8. The welding quality inspection device for large-scale wind turbine towers according to claim 7, characterized in that, The cleaning mechanism also includes: A baffle is fixedly installed at the bottom of the protective plate and located between the first nozzle and the mounting base. The bottom of the baffle is level with the bottom of the mounting base so that the bottom of the second industrial camera is below the bottom of the baffle. The bottoms of the first nozzle and the second nozzle are both higher than the bottom of the baffle. The ends of the first tube and the second tube near the protective plate are both designed as flexible hoses and are reserved with lengths that can be raised and lowered with the protective plate.

9. The welding quality inspection device for large-scale wind turbine towers according to claim 1, characterized in that, The lifting mechanism includes: The second slide is formed on the side wall of the stand, and the second slide contains a second slider, which is fixedly connected to the end of the crossbar. A threaded rod is rotatably mounted on the top of the stand and extends into the second slide groove. The side wall of the threaded rod located in the second slide groove is threadedly connected to the second slider. A second servo motor is fixedly mounted on the top of the stand, and the output shaft of the second servo motor is fixedly connected to the top of the threaded rod through a coupling.

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