Gasifier shell surface repair support device

Abstract

The present application relates to a kind of gasifier shell surface repair support device, it mainly includes support plate, support table, support ring being annular, support plate is fixed in support table top surface, support table bottom surface is coaxially rotatably installed on the top end surface of support ring, and the bottom end surface of support ring is equipped with the array of several support legs;Several driven bevel gears are rotatably installed in the lower outside of support ring, and the installation hole for corresponding rotating shaft rotatable installation is equipped at the top end of each support leg, and rotating shaft is arranged below support ring along the radial direction of support ring, and the end of rotating shaft away from driven bevel gear is coaxially fixed with screw rod, screw rod is threadedly connected with contact block, and contact block is slidably fitted on guide rod;When all driven gears are driven by driving bevel gear, screw rod rotates and moves axially, and contact block contacts with gasifier shell.The present application can provide stable and reliable support when repairing, and it is convenient to quickly and accurately repair gasifier shell.

Description

Technical Field

[0001] This invention relates to the field of gasifier shell repair technology, specifically to a surface repair support device for gasifier shells. Background Technology

[0002] Gasifiers are key equipment in industries such as coal chemical and petrochemical. Their shells are exposed to harsh working environments with high temperature, high pressure and corrosive media for a long time, and their surfaces are prone to defects such as cracks, corrosion and wear. If these defects are not repaired in time, they will affect the normal operation of the gasifier and may even cause safety accidents. The gasifier shell is typically a large rotating body, with a circular main body and conical ends. It has extremely thick walls and a height usually exceeding 4 meters. Therefore, during surface repair of the gasifier shell, it cannot be rotated or moved as easily as some other rotating workpieces. Repairing it requires the use of grinding machines, welding equipment, and, if necessary, personnel standing on a lifting platform. This necessitates placing all repair equipment on the platform. Because the gasifier is cylindrical, the lifting platform must be continuously moved around the perimeter of the shell to different positions for repair, especially when circumferential cutting, grinding, or welding is required. This method is extremely inconvenient, relying almost entirely on the operator's touch, making it difficult to guarantee accuracy and safety, and resulting in very low repair efficiency.

[0003] It is evident that current repair operations for gasifier shells cannot reliably and flexibly move equipment and personnel according to the needs of the repair location. This necessitates frequent relocation of operators and equipment, increasing labor intensity and reducing repair accuracy. Especially when using hoists or lifting platforms, the overall stability is poor, prone to swaying, posing safety hazards, and failing to automatically and accurately position the shell's circumferential movement, thus affecting repair efficiency. Therefore, developing a gasifier shell surface repair support device that can be automatically positioned and installed, has a stable and reliable overall structure, and is easy to operate is of significant practical importance. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a support device for repairing the surface of a gasifier shell, so as to solve the technical problems mentioned in the background art and improve the safety, convenience and stability of repairing the gasifier shell.

[0005] This invention is achieved through the following technical solution: A surface repair support device for a gasifier shell includes a support plate, a support platform, and a support ring arranged coaxially from top to bottom. The support plate is fixed to the top surface of the support platform, and the bottom surface of the support platform is rotatably mounted on the top surface of the support ring. The bottom surface of the support ring is provided with a plurality of support legs arranged in a ring array. On the inner side of the bottom end of the support ring, a plurality of mounting blocks with threaded holes in a circular array are protruding and fixed. A plurality of driven bevel gears are rotatably mounted on the lower outer side of the support ring. The top of each support leg is located between a driven bevel gear and a mounting block, spaced apart and facing each other. At the top of each support leg, a mounting hole is provided for the rotation of a corresponding shaft. The shaft is radially positioned below the support ring, and a guide block is fixed to the side of the shaft. The guide block is slidably mounted on a strip on the inner wall of the shaft hole of the driven bevel gear. In the shaped groove; the end of the rotating shaft opposite to the driven bevel gear is coaxially fixed with a lead screw, which passes through the threaded hole and is rotatably connected to a contact block. The contact block is slidably fitted on a guide rod, which is fixed parallel to the lead screw to the side of the mounting block; all driven gears mesh with a driving bevel gear, so that when the driving bevel gear rotates, the rotating shaft and the lead screw rotate and move axially at the same time, pushing the contact block to translate along the guide rod so as to press against the surface of the gasifier shell to be repaired.

[0006] Furthermore, the support plate is equipped with mounting bases for installing a grinder and a welding machine, so that the grinding head of the grinder can be attached to the surface of the gasifier shell, and the welding torch can be aimed directly at the welding bevel processed at the crack after grinding.

[0007] Furthermore, an internal gear ring is coaxially fixed on the inner side of the support platform. The internal gear ring meshes with a first cylindrical gear. The first cylindrical gear is mounted on the main shaft of the first motor, and the first motor is mounted on the bottom end face of the support ring. After the main shaft rotates upward and passes through the support ring, the first cylindrical gear is fixed thereon.

[0008] Furthermore, the bottom of the support platform is provided with a T-shaped slider, which is slidably installed in an annular groove coaxially opened on the top surface of the support platform, so as to realize the circumferential rotation of the support platform and the support plate around the gasifier shell.

[0009] Furthermore, the bottom surface of the driving bevel gear is a gear surface, and the driving bevel gear has an integral guide ring on its inner side. The guide ring is coaxially rotatably mounted in the top surface of the support ring. The inner side of the driving bevel gear has an internal gear structure to mesh with the second cylindrical gear driven by the second motor to achieve rotation.

[0010] Furthermore, the driven bevel gear is rotatably mounted in a seat sleeve at one end away from the tooth surface. The seat sleeve is fixedly connected to the support leg below it via a support arm. The other end of the driven bevel gear has an annular slot. The side of the support leg near the top end is provided with a bushing that is directly opposite the annular slot. One end of the bushing is coaxially inserted into the annular slot to form a rotatable mounting of the driven bevel gear together with the seat sleeve.

[0011] Furthermore, the contact block includes a stepped frustum and a tile plate coaxially fixed thereto, the tile plate having an arc-shaped shell structure; the step of the stepped frustum is slidably passed through by the guide rod and can be inserted into the tile plate, but cannot protrude from the tile plate, the end of the lead screw is rotatably installed inside the center of the stepped frustum and cannot be axially separated from it.

[0012] Furthermore, both the active bevel gear and the support ring are two-part spliced ​​ring structures. The lower end faces of the two semi-rings of the support ring are integrally formed with a first splicing block and a second splicing block, respectively. After the two splicing blocks are positioned by a pin, they are threadedly connected into one piece by at least one locking stud. A locking gear is coaxially fixed to the end of the locking stud away from the thread. The bottom end of the first splicing block extends to the bottom of the second splicing block. At least one side of the bottom end of the first splicing block is hinged to a curved arm by a hinge post. The bottom end of the curved arm is offset inward to form a bevel structure. A gear plate is coaxially fixed to the end of the hinge post. The gear plate and the locking gear are always engaged. When the locking stud is tightened, the bottom end of the curved arm can contact the ground.

[0013] Furthermore, both the bottom end of the support leg and the bottom end of the curved arm are threadedly fitted with columns, which can move vertically in the form of a threaded pair to maintain reliable contact with the ground; a fastening spring that is always in a compressed state is provided between the truncated cone at the bottom end of the column and the bottom end face of the support leg.

[0014] Furthermore, an adjusting rod is coaxially rotatably installed inside the column. A limit ring is fixed at the top of the adjusting rod, and a screw plunger is fixed at the bottom. The screw plunger is threadedly installed in a threaded mounting hole in the bottom end face of the column. Several partially exposed steel balls are rolled inside the bottom end face of the screw plunger. When the adjusting rod is rotated downwards until the limit ring contacts the top of the column, the exposed parts of the steel balls are completely outside the bottom end face of the column. When the adjusting rod is rotated upwards to its limit, the steel balls are completely inside the threaded mounting hole.

[0015] The beneficial effects of this invention are as follows: This gasifier shell surface repair support device, by setting the overall structure as a ring, stands coaxially with the gasifier shell to be repaired. With the help of the gasifier's huge self-weight and the support of the ground, it can be more firmly installed and fixed, supporting a series of equipment and operators required for repair, which facilitates the repair personnel to carry out construction quickly, especially the repair operation along the circumference of the gasifier shell, which is accurate and efficient.

[0016] Furthermore, the synchronous movement of all contact blocks in this invention enables coaxial centering installation, which not only improves the installation stability of this repair support device, but also makes it adaptable to gasifier shells of different diameters, thus exhibiting high versatility.

[0017] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the installation and use structure of the present invention; Figure 2 for Figure 1 Enlarged view of point Q; Figure 3 A cross-sectional structural diagram of a drive bevel gear; Figure 4 This is a cross-sectional view of the support ring. Figure 5 This is a top view of the contact block; Figure 6 This is a schematic diagram of the locking stud and locking gear. Figure 7 for Figure 1 Right view of one of the crank arm and gear plate mounting structures in the diagram; Figure 8 This is a structural diagram showing the installation of a column within the support leg and the curved arm.

[0019] In the diagram: 1. Gasifier shell; 2. Support plate; 3. Support platform; 4. Support ring; 5. Support leg; 6. Internal gear ring; 7. First cylindrical gear; 8. First motor; 9. Driven bevel gear; 10. Driven bevel gear; 10. Guide ring; 1001. Guide block; 11. Support arm; 12. Rotating shaft; 13. Contact block; 14. Stepped frustum; 1401. Tile plate; 1402. Bushing; 15. Second cylindrical gear; 16. Second motor; 17. Guide rod; 18. First splicing block; 19. Second splicing block; 20. Locking stud; 21. Locking gear; 22. Crank arm; 23. Hinge column; 24. Gear plate; 25. Column; 26. Adjusting rod; 27. Limiting ring; 28. Screw plug; 29. ​​Steel ball; 30. Fastening spring; 31. Seat sleeve; 32. Mounting block; 33. Lead screw; 34. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] Please see Figures 1-2As shown, this invention provides a technical solution: a support device for repairing the surface of a gasifier shell. In actual manufacturing, it mainly includes, from top to bottom, a ring-shaped support plate 2, a support platform 3, and a support ring 4, all coaxially arranged. The support plate 2 is fixed to the top surface of the support platform 3, serving as a place for placing welding equipment, grinding equipment, and other tools, as well as a place for personnel to stand and operate. Guardrails can be added around the support plate 2 if necessary. The bottom surface of the support platform 3 is coaxially and rotatably mounted on the top surface of the support ring 4, so that during construction, the rotation of the support platform 3 causes the support plate 2 to rotate, automatically moving the personnel or equipment to the side of the gasifier shell 1 corresponding to the side to be repaired. Several support legs 5 in a ring array are provided on the bottom surface of the support ring 4 to support the entire device, allowing it to be installed on the ground. If necessary, all support legs 5 can be configured as telescopic structures to achieve support operations at different heights; or ladders can be provided on the sides of the support legs 5 so that repair personnel can climb up to the support plate 2. Specifically, in this embodiment, a plurality of mounting blocks 33 with threaded holes in a ring array are protruded and fixed on the inner side of the bottom end of the support ring 4. The mounting blocks 33 can be integrally formed with the support ring 4. On the lower outer side of the support ring 4, a plurality of driven bevel gears 9 are rotatably mounted, and these driven bevel gears 9 are arranged in a ring array; as shown... Figure 2 As shown, the top of each support leg 5 in this embodiment is located between the driven bevel gear 9 and the mounting block 33, which are spaced apart and directly opposite each other. The three have their respective mounting holes coaxially arranged. Near the top of each support leg 5, there is a mounting hole for the corresponding rotating shaft 13 to be rotatably mounted. The rotating shaft 13 is arranged radially below the support ring 4. To drive the rotating shaft 13 and transmit torque, a guide block 11 is fixed to the side of the rotating shaft 13. The guide block 11 can be a cuboid block structure with a smooth surface. The guide block 11 is slidably mounted in a strip groove on the inner wall of the shaft hole of the driven bevel gear 9. This strip groove is parallel to the axial direction of the shaft hole. Furthermore, a lead screw 34 needs to be coaxially fixed at the end of the rotating shaft 13 opposite to the driven bevel gear 9. This lead screw 34, threaded through the threaded hole, has a contact block 14 rotatably connected to its end. This contact block 14 contacts the gasifier shell 1 to achieve centering of the entire repair support device, ensuring concentric installation outside the gasifier. More specifically, in implementation, as... Figure 2 The contact block 14 can be slidably fitted onto a guide rod 18, which is fixed parallel to the lead screw 34 to the side of the mounting block 33. The guide rod 18 primarily serves to prevent the contact block 14 from rotating, guiding it to move only in a straight line. To achieve the aforementioned centering function, all contact blocks 14 must move synchronously so that when all are in contact with the gasifier shell 1, this repair support device is concentric with the gasifier shell 1. All driven gears are engaged in a single... Figure 3Below the active bevel gear 10 shown, when the active bevel gear 10 rotates, it drives the driven bevel gear 9 to rotate. Due to the action of the threaded pair between the lead screw 34 and the mounting block 33, the rotating shaft 13 and the lead screw 34 rotate and move axially toward the gasifier shell 1, and finally push the contact block 14 to translate along the guide rod 18, so that the contact block 14 can be pressed into contact with the surface of the gasifier shell 1 to be repaired, thus achieving centering installation.

[0024] In this embodiment, a mounting base (not shown in the figure) for installing a grinding machine and a welding machine can be adapted to be provided on the support plate 2. This allows the grinding head of the grinding machine to be attached to the surface of the gasifier shell 1, which is conducive to uniform grinding along the circumference of the gasifier shell 1 and correcting its shape. Moreover, during use, the welding torch can also be used to weld the welding bevel processed at the crack after grinding. Or, when the gasifier shell 1 is severely damaged in a local area, with a very thin local thickness and a large crack, and cannot be directly welded for repair, it is necessary to cut a rectangular block of shell for repair. In this case, welding along the circumferential path can be well achieved, resulting in better repair effect and more convenient repair.

[0025] In this embodiment, as Figure 1 and Figure 2 As shown, an internal gear ring 6 is coaxially fixed on the inner side of the support platform 3. This internal gear ring 6 meshes with a first cylindrical gear 7, which is mounted on the main shaft of a first motor 8. The first motor 8 is mounted on the bottom end face of the support ring 4, with the main shaft vertically upward. After rotating through the support ring 4, the first cylindrical gear 7 is fixed thereon, thereby automatically rotating the support plate 2 to the repair position. In specific manufacturing, a T-shaped slider can be provided at the bottom end of the support platform 3, and the slider is slidably mounted as shown in the figure. Figure 4 As shown, the annular groove coaxially opened on the top surface of the support platform 3 allows the support platform 3 and the support plate 2 to rotate circumferentially around the gasifier shell 1, which is simple in structure and easy to manufacture.

[0026] In this embodiment, as Figure 3 Since the bottom surface of the driving bevel gear 10 in this embodiment is a gear surface, a ring-shaped guide ring 1001 can be integrally formed on the inner side of the driving bevel gear 10. The guide ring 1001 is coaxially rotatably mounted in the top surface of the support ring 4, thereby realizing the rotatable installation of the driving bevel gear 10. The inner surface of this driving bevel gear 10 is an internal gear structure, which meshes with the second cylindrical gear 16 driven by the second motor 17 to achieve rotation, thereby realizing the purpose of automatically installing this repair support device on the periphery of the gasifier shell 1 to be repaired. In this embodiment, the installation of the driven bevel gear 9 can be as follows: Figure 2The driven bevel gear 9 is rotatably mounted in a seat sleeve 32 at one end away from the tooth surface. The seat sleeve 32 is fixedly connected to the support leg 5 below it via a support arm 12, thereby supporting and mounting the driven bevel gear 9. In addition, there is an annular slot at the other end of the driven bevel gear 9, and a bushing 15 is provided on the side of the support leg 5 near the top, facing the annular slot. One end of the bushing 15 is coaxially inserted into the annular slot to form a rotatable mounting of the driven bevel gear 9 together with the seat sleeve 32.

[0027] In this embodiment, as Figure 2 and Figure 5 The contact block 14 includes a stepped frustum 1401 and a tile plate 1402 coaxially fixed thereto. The tile plate 1402 has an arc-shaped shell structure so as to fit concentrically with the gasifier shell 1. The steps of the stepped frustum 1401 are slidably passed through by the guide rod 18 and can be inserted into the tile plate 1402 to guide its translation, but cannot protrude from the tile plate 1402 to avoid the guide rod 18 pressing against the gasifier shell 1. Therefore, in actual manufacturing, the guide rod 18 can be designed as an adjustable telescopic rod, with its telescopic section slidably installed with the contact block 14. During installation, the end of the lead screw 34 is rotatably installed inside the center of the stepped frustum 1401 and cannot be axially separated from it, so that it can always carry the contact block 14 for translation during transmission.

[0028] Besides hoisting the gasifier shell 1 entirely into the repair support device during repair, and then centering the repair support device relative to the gasifier shell 1, the gasifier shell 1 can also be repaired directly on-site. This is the most practical method because the gasifier shell 1 is usually large and extremely thick, making it bulky. Especially for some large industrial gasifiers, the diameter can reach over 5 meters, and the wall thickness can reach over 5 centimeters. For example, some pulverized coal gasifiers have a diameter of about 4.0m-5.2m, and water-coal slurry gasifiers can reach a diameter of 5.0m-6.2m, with a thickness typically between 60mm and 150mm. Therefore, the repair support device in this invention can be coaxially fixed to the periphery of the gasifier shell 1. Utilizing the high strength of the gasifier shell itself, it is attached to the gasifier shell 1, serving as a platform for operators to climb, stand, and place equipment, which is very convenient. However, since the repair support device is a ring structure, it is difficult to install directly on the gasifier shell 1. Therefore, in this embodiment, the aforementioned drive bevel gear 10 and support ring 4 are both designed as two-lobed spliced ​​ring structures. The drive bevel gear 10 mainly undertakes the transmission function, so it can be directly installed on the gasifier shell 1. Figure 1As shown, ear plates (not shown in the figure) are fixedly connected to the upper part of the two annular lobe mating ends, and then positioned by pins and connected by bolts. For the support ring 4, because it also serves as a main support component, the splicing structure is special: on the lower end face of the mating ends of the two half-rings of the support ring 4, each has an integrally formed... Figure 1 The first splicing block 19 and the second splicing block 20 shown are positioned by pins, and the support ring 4 forms a ring. They are then fixed together by a threaded connection. In practice, the two ring segments are threaded together by at least one locking stud 21, thus bringing the two ring segments closer together from both sides of the gasifier shell 1. After assembly, they are fixed together by the locking stud 21, and then the repair support device is moved to a set position coaxially fixed around the gasifier shell 1 using bevel gear transmission. Specifically: [Example...] Figures 1-2 ,as well as Figure 6 At the end of the locking stud 21 facing away from the thread, a locking gear 22 is coaxially fixed, and the bottom end of the first splicing block 19 extends below the second splicing block 20, and then at least one side, or both sides, of the first splicing block 19 near the bottom end to improve load-bearing capacity; a crank arm 23 is hinged to the hinge post 24, and the bottom end of the crank arm 23 is offset inward to form as follows. Figure 7 The bend-shaped structure shown has a toothed disc 25 coaxially fixed to the end of the hinge post 24. The toothed disc 25 and the locking gear 22 are always engaged. A crucial detail is that during the tightening of the locking stud 21, because the locking gear 22 is always engaged with the toothed disc 25 (i.e., the axial length of the locking gear 22 is relatively long), the toothed disc 25 rotates along with the locking stud 21 during the tightening process. This causes the curved arm 23 to rotate towards the gasifier shell 1 until the bottom of the curved arm 23 also contacts the ground. At this point, the locking stud 21 is just tightened. The curved arm 23 then acts as another support component similar to a support leg 5 in this repair support device. Due to its special structure and installation method, if the curved arm 23 has a tendency to flip upwards under pressure, it will... Figure 7 As shown, the crank arm 23 has a counterclockwise rotation tendency, which causes the locking gear 22 to have a clockwise rotation tendency, thus causing the locking stud 21 to have a further tightening tendency. This ensures that the locking stud 21 maintains its tight and reliable connection, thereby guaranteeing the overall stability and reliability of the support ring 4 when it is under load. The structure is very simple but ingenious. It not only makes up for the weakness of the support ring 4 at the splicing end, but also, together with all the support legs 5, forms a more stable support for this repair support device.

[0029] In this embodiment, as Figure 8As shown, each support leg 5 and the bottom of the curved arm 23 is threadedly fitted with a column 26. The bottom of the column 26 can be a truncated cone structure. The column 26 can move vertically in the form of a threaded pair to maintain reliable contact with the ground, so that the support leg 5 can play a full load-bearing role. In order to maintain relative stability when the column 26 is threaded, a fastening spring 31 that is always in a compressed state is provided between the truncated cone at the bottom of the column 26 and the bottom end face of the support leg 5.

[0030] In addition, as another special design feature, in this embodiment, such as Figure 8 As shown, an adjusting rod 27 is coaxially rotatably installed inside the column 26. A limit ring 28 is fixed near the top of the adjusting rod 27, and a cylindrical plunger 29 is fixed at the bottom of the adjusting rod 27. The plunger 29 is threadedly installed in a threaded mounting hole in the bottom end face of the column 26. At the same time, several partially exposed steel balls 30 are rolled inside the bottom end face of the plunger 29. In use, when the adjusting rod 27 is rotated downwards until the limit ring 28 contacts the top of the column 26, the exposed part of the steel balls 30 must be completely outside the bottom end face of the column 26 so as to roll in contact with the ground. This is mainly to facilitate the entire repair support device to be more easily moved to a position coaxial with the gasifier shell 1 when the above-mentioned active bevel gear 10 rotates, avoiding the problem of slow and sluggish movement due to the large friction between the support leg 5 and the ground when its own weight is large. After the centering installation is completed, when the adjusting rod 27 is rotated upwards to its limit, that is, when the stud plug 29 retracts to the bottom of the threaded mounting hole, the steel ball 30 is completely located within the threaded mounting hole, and the column 26 directly contacts the ground to bear the load. In practice, the thread of the column 26 should preferably be a trapezoidal thread to have sufficient load-bearing capacity.

[0031] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A repair and support device for the surface of a gasifier shell, characterized in that: The support plate (2), support platform (3), and support ring (4) are arranged coaxially from top to bottom. The support plate (2) is fixed on the top surface of the support platform (3). The bottom surface of the support platform (3) is coaxially rotatably mounted on the top surface of the support ring (4). The bottom surface of the support ring (4) is provided with several support legs (5) arranged in a ring array. On the inner side of the bottom end of the support ring (4), a number of mounting blocks (33) with threaded holes in a ring array are fixedly protruding. A number of driven bevel gears (9) are rotatably mounted on the lower outer side of the support ring (4). The top of each support leg (5) is located between the driven bevel gears (9) and the mounting blocks (33) that are spaced apart from each other. At the top of each support leg (5), there is a mounting hole for the corresponding rotating shaft (13) to be rotatably mounted. The rotating shaft (13) is arranged along the radial direction of the support ring (4) below the support ring (4). A guide block (11) is fixed on the side of the rotating shaft (13). The guide block (11) is slidably mounted in the strip groove on the inner wall of the shaft hole of the driven bevel gear (9). The end of the rotating shaft (13) opposite to the driven bevel gear (9) is coaxially fixed with a lead screw (34). The lead screw (34) passes through the threaded hole and is rotatably connected to a contact block (14). The contact block (14) is slidably fitted on a guide rod (18). The guide rod (18) is fixed parallel to the side of the mounting block (33). All driven gears mesh with a driving bevel gear (10) so that when the driving bevel gear (10) rotates, the rotating shaft (13) and the lead screw (34) rotate and move axially at the same time, and push the contact block (14) to translate along the guide rod (18) so as to press and contact the surface of the gasifier shell (1) to be repaired.

2. The gasifier shell surface repair and support device according to claim 1, characterized in that: The support plate (2) is provided with a mounting base for installing a grinder and a welding machine, so that the grinding head of the grinder can be attached to the surface of the gasifier shell (1), and the welding torch can be directly aligned with the welding bevel processed at the crack after grinding.

3. The gasifier shell surface repair and support device according to claim 1, characterized in that: An internal gear ring (6) is coaxially fixed on the inner side of the support platform (3). The internal gear ring (6) meshes with a first cylindrical gear (7). The first cylindrical gear (7) is mounted on the main shaft of the first motor (8). The first motor (8) is mounted on the bottom end face of the support ring (4). After the main shaft rotates upward and passes through the support ring (4), the first cylindrical gear (7) is fixed thereon.

4. The gasifier shell surface repair and support device according to claim 3, characterized in that: The bottom end of the support platform (3) is provided with a T-shaped slider. The slider is slidably installed in an annular groove coaxially opened on the top surface of the support platform (3) to realize the circumferential rotation of the support platform (3) and the support plate (2) around the gasifier shell (1).

5. The gasifier shell surface repair and support device according to claim 1, characterized in that: The bottom surface of the active bevel gear (10) is a gear surface. The active bevel gear (10) has an integral guide ring (1001) on its inner side. The guide ring (1001) is coaxially rotatably mounted in the top surface of the support ring (4). The inner side of the active bevel gear (10) is an internal gear structure, which meshes with the second cylindrical gear (16) driven by the second motor (17) to achieve rotation.

6. The gasifier shell surface repair and support device according to claim 5, characterized in that: The driven bevel gear (9) is rotatably mounted in a seat sleeve (32) at one end away from the tooth surface. The seat sleeve (32) is fixedly connected to the support leg (5) below it via a support arm (12). The other end of the driven bevel gear (9) has an annular slot. The side of the support leg (5) near the top end is provided with a bushing (15) facing the annular slot. One end of the bushing (15) is coaxially inserted into the annular slot to form a rotatable mounting of the driven bevel gear (9) together with the seat sleeve (32).

7. The gasifier shell surface repair and support device according to claim 1, characterized in that: The contact block (14) includes a stepped frustum (1401) and a tile plate (1402) fixed coaxially therewith. The tile plate (1402) has an arc-shaped shell structure. The step of the stepped frustum (1401) is slidably passed through by the guide rod (18) and can be inserted into the tile plate (1402), but cannot pass out of the tile plate (1402). The end of the lead screw (34) is rotatably installed in the center of the stepped frustum (1401) and cannot be axially separated from it.

8. The gasifier shell surface repair and support device according to any one of claims 1-7, characterized in that: The active bevel gear (10) and the support ring (4) are both two-lobe spliced ​​ring structures. The lower end faces of the two half rings of the support ring (4) are integrally provided with a first splicing block (19) and a second splicing block (20). After the two splicing blocks are positioned by pins, they are threadedly connected into one piece by at least one locking stud (21). The locking stud (21) is coaxially fixed with a locking gear (22) at one end away from the thread; The bottom end of the first splicing block (19) extends below the second splicing block (20). At least one side of the bottom end of the first splicing block (19) is hinged with a curved arm (23) by a hinge post (24). The bottom end of the curved arm (23) is offset inward to form a bend structure. A gear plate (25) is coaxially fixed at the end of the hinge post (24). The gear plate (25) is always engaged with the locking gear (22). When the locking stud (21) is tightened, the bottom end of the curved arm (23) can contact the ground.

9. The gasifier shell surface repair and support device according to claim 8, characterized in that: The bottom end of the support leg (5) and the bottom end of the crank arm (23) are both threadedly fitted with a column (26). The column (26) can move vertically in the form of a threaded pair to maintain reliable contact with the ground. A fastening spring (31) that is always in a compressed state is provided between the truncated cone at the bottom end of the column (26) and the bottom end face of the support leg (5).

10. The gasifier shell surface repair support device according to claim 9, characterized in that: An adjusting rod (27) is coaxially rotatably installed inside the column (26). A limit ring (28) is fixed at the top of the adjusting rod (27), and a screw plunger (29) is fixed at the bottom. The screw plunger (29) is threadedly installed in the threaded mounting hole in the bottom end face of the column (26). Several partially exposed steel balls (30) are rolled inside the bottom end face of the screw plunger (29). When the adjusting rod (27) rotates downward until the limit ring (28) and the top of the column (26) are in contact, the exposed part of the steel balls (30) is completely outside the bottom end face of the column (26). When the adjusting rod (27) rotates upward to its limit, the steel balls (30) are completely inside the threaded mounting hole.

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