High-pressure heater manhole end cover dismounting and conveying device

Abstract

The utility model discloses a high-pressure heater manhole end cover dismounting and conveying device, which relates to the field of high-pressure heater auxiliary equipment, and comprises an actuating mechanism, a suspension device and a transmission rod, and the actuating mechanism is arranged in the middle of the top end of a movable frame; the top end of the suspension device is connected with the execution mechanism; the transmission rod penetrates through the bottom of the hanging device, an operating hand wheel is arranged at one end of the transmission rod, a protrusion is arranged at the other end of the transmission rod, the middle of the top face of the protrusion is concaved inwards to form a first through hole, the protrusion can be inserted between the two disassembling blocks, and the two disassembling blocks are symmetrically arranged in the middle of the outer wall of the manhole cover. The middles of the top faces of the two dismounting blocks are sunken inwards to form second through holes, and the two dismounting blocks and the protrusions are connected through first transmission pins penetrating through the first through holes and the second through holes in a penetrating mode. The utility model is suitable for dismounting and transporting manhole covers of various types of high-pressure heaters, so that the high-pressure heaters are efficiently and conveniently overhauled.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary equipment for high-pressure heaters, in particular to a device for disassembling, assembling, transporting and installing the manhole end cover of a high-pressure heater. Background Technique

[0002] A high-pressure heater is a device that uses the heat of steam to heat a medium. It is widely used in industrial production, civil buildings, agriculture, thermal power plants, heat supply networks and other fields. In order to facilitate maintenance personnel to enter the interior of the high-pressure heater for inspection, a manhole cover is designed for the high-pressure heater. Since the pressure of the high-pressure heater is relatively high and the risk of leakage is relatively large, in order to prevent the high-pressure heater from leaking, the manhole cover of the high-pressure heater is designed in an elliptical shape and a self-sealing form, and is reversely installed inside the high-pressure heater. When the water side of the high-pressure heater is put into operation, under the action of the water side pressure, the sealing gasket is pressed, so as to achieve the sealing effect.

[0003] During the disassembly and installation process of the manhole cover of the high-pressure heater, there are disadvantages:

[0004] (1) During the internal inspection process of the high-pressure heater, most enterprises use a chain block to hang the manhole cover before disassembling the manhole cover, and store the manhole cover inside the high-pressure heater after loosening the manhole cover, and carry out the maintenance work of the high-pressure heater. There is a risk that the manhole cover will fall onto the pipeline below the high-pressure heater.

[0005] (2) The manhole cover of the high-pressure heater is stored inside the high-pressure heater, occupying limited space and posing a potential safety hazard to the maintenance personnel.

[0006] (3) During the installation process of the manhole cover, due to the self-weight of the manhole cover acting downward and the installation direction being horizontal, it is easy to be unevenly stressed and damage the sealing gasket during the installation process, resulting in leakage of the manhole cover.

[0007] (4) The existing high-pressure heater maintenance process lacks a special device for disassembling, transporting and installing the manhole cover of a high-pressure heater that is applicable to the disassembly of manhole covers of various types of high-pressure heaters and can be used repeatedly.

[0008] Therefore, the technical personnel in the field provide a device for disassembling, assembling, transporting and installing the manhole end cover of a high-pressure heater to solve the problems raised in the above background technique. Content of the Utility Model

[0009] The utility model provides a device for disassembling, assembling, transporting and installing the manhole end cover of a high-pressure heater, which can quickly disassemble, transport and install the manhole cover of the high-pressure heater.

[0010] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0011] A device for disassembling, assembling, and transporting the manhole end cover of a high-pressure heater of the present utility model includes:

[0012] A moving frame, the bottom end of the moving frame is provided with universal wheels;

[0013] An actuator, the actuator is installed in the middle of the top end of the moving frame;

[0014] A suspension device, the top end of the suspension device is connected to the actuator;

[0015] A transmission rod, the transmission rod passes through the bottom of the suspension device, one end of the transmission rod is provided with an operating handwheel, the other end of the transmission rod is provided with a protrusion, the middle of the top surface of the protrusion is recessed inward to form a first through hole, the protrusion can be inserted between two disassembly blocks, the two disassembly blocks are symmetrically arranged in the middle of the outer wall of the manhole cover, the middle of the top surface of the two disassembly blocks is recessed inward to form a second through hole, and the two disassembly blocks and the protrusion are connected by a first transmission pin inserted through the first through hole and the second through hole.

[0016] Further, two symmetrically arranged positioning holes are opened on the side of the manhole cover close to the transmission rod, a crossbar is arranged on the transmission rod close to the high-pressure heater, the crossbar is connected to the manhole cover by bolts, one end of the bolt is threadedly connected to the positioning hole, and the other end of the bolt passes through the crossbar and is fixed by a nut.

[0017] Further, the cross-section of the operating handwheel is in an L-shaped structure, and the vertical part of the L-shaped structure is fixedly connected to the end of the transmission rod by a fixing bolt.

[0018] Further, the actuator includes:

[0019] An actuator body, both ends of the actuator body are installed on the moving frame;

[0020] A transmission shaft, the top end of the transmission shaft passes through the actuator body and is threadedly connected to the actuator body, and the bottom end of the transmission shaft extends into the top end of the suspension device.

[0021] Further, a handwheel is arranged on one side of the actuator body, and the handwheel is connected to the transmission shaft by two meshing sector gears.

[0022] Further, the suspension device includes:

[0023] A suspension body, the middle of the top end of the suspension body is recessed inward to form a connection hole, and the transmission shaft can extend into the connection hole;

[0024] A suspension rod, the top end of the suspension rod is connected to the bottom end of the suspension body, a third through hole is opened at the bottom of the suspension rod, and the transmission rod passes through the third through hole.

[0025] Further, a fourth through hole is formed at the top of the side wall of the hanging main body. The fourth through hole is communicated with the connection hole. A second transmission pin is inserted into the fourth through hole. The second transmission pin also passes through a transmission shaft located in the connection hole. The part of the second transmission pin located outside the hanging main body is fixed by a nut.

[0026] Further, the moving frame includes two symmetrically arranged L-shaped brackets. The ends of the two L-shaped brackets close to each other extend into both ends of the execution main body. The bottom ends of the two L-shaped brackets are connected to the middle of the top surface of the bottom plate. The universal wheels are installed on the bottom surface of the bottom plate.

[0027] Further, the ends of the L-shaped brackets extending into the execution main body are connected by connecting bolts. The connecting bolts pass through the L-shaped brackets and extend into the top of the execution main body. Both ends of the connecting bolts respectively extend out of the execution main body and are fixed by nuts.

[0028] Further, a plurality of rib plates are arranged between the bottom of the L-shaped bracket and the bottom plate.

[0029] In the above technical solution, a device for disassembling, assembling and transporting the manhole end cover of a high-pressure heater provided by the present utility model has the following beneficial effects:

[0030] 1. It can be applied to the disassembly, assembly and transportation of manhole covers of various types of high-pressure heaters, meet the disassembly and assembly requirements of the manhole covers of high-pressure heaters, and make the maintenance work of high-pressure heaters efficient and convenient;

[0031] 2. It can effectively avoid damage to the equipment, facilities and finished products around the high-pressure heater;

[0032] 3. The device of the present application has a simple structure, low manufacturing cost, simple use and maintenance, and can be repeatedly used for a long time if properly stored daily;

[0033] 4. The supporting use of each component of the device of the present application greatly improves the disassembly, assembly and transportation efficiency of the manhole cover of the high-pressure heater, shortens the maintenance period, labor and other cost expenses, and ensures the personal and equipment safety during the construction operation process. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0035] Figure 1 It is a schematic structural diagram of a device for disassembling, assembling and transporting the manhole end cover of a high-pressure heater provided by an embodiment of the present utility model;

[0036] Figure 2 This is a cross-sectional view during the use of a device for disassembling, assembling and transporting the manhole end cover of a high-pressure heater provided by an embodiment of the present utility model.

[0037] Explanation of the reference numerals in the drawings:

[0038] 10. Moving frame; 11. Universal wheel; 12. L-shaped bracket; 13. Bottom plate; 14. Connecting bolt; 15. Rib plate;

[0039] 20. Transmission rod; 21. Operating handwheel; 22. Protrusion; 23. First through hole; 24. First transmission pin; 25. Fixed bolt;

[0040] 30. Disassembly block; 31. Manhole cover; 32. Second through hole; 33. Positioning hole;

[0041] 40. High-pressure heater;

[0042] 50. Cross arm; 51. Bolt;

[0043] 60. Execution body; 61. Transmission shaft; 62. Handwheel;

[0044] 70. Suspension body; 71. Connecting hole; 72. Suspension rod; 73. Third through hole; 74. Fourth through hole; 75. Second transmission pin. Detailed implementation manners

[0045] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the drawings.

[0046] See Figure 1-2 as shown;

[0047] A device for disassembling, assembling and transporting the manhole end cover of a high-pressure heater according to an embodiment of the present utility model includes:

[0048] A moving frame 10, the bottom end of the moving frame 10 is provided with universal wheels 11;

[0049] An execution mechanism, the execution mechanism is installed in the middle of the top end of the moving frame 10;

[0050] A suspension device, the top end of the suspension device is connected to the execution mechanism;

[0051] The transmission rod 20 passes through the bottom of the suspension device. One end of the transmission rod 20 is provided with an operating handwheel 21, and the other end of the transmission rod 20 is provided with a protrusion 22. The middle part of the top surface of the protrusion 22 is recessed inward to form a first through hole 23. The protrusion 22 can be inserted between two disassembly blocks 30. The two disassembly blocks 30 are symmetrically arranged in the middle of the outer wall of the manhole cover 31. The middle part of the top surface of the two disassembly blocks 30 is recessed inward to form a second through hole 32. The two disassembly blocks 30 and the protrusion 22 are connected by a first transmission pin 24 inserted through the first through hole 23 and the second through hole 32.

[0052] During specific use, rotate the operating handwheel 21. The manhole cover 31 is driven to rotate through the transmission rod 21, the protrusion 22 and the two disassembly blocks 32 connected by the first transmission pin 24. Then, the manhole cover 31 can be loosened from the high-pressure heater and pushed into the high-pressure heater. At this time, under the action of its own weight, the manhole cover 31 changes from a state perpendicular to the horizontal plane to a state parallel to the horizontal plane through the first transmission pin 24. Then, rotate the operating handwheel 21 again to rotate the removed manhole cover 31 by 90°, so that the manhole cover 31 is horizontally placed. At this time, the short elliptical direction of the manhole cover 31 is perpendicular to the long ellipse of the manhole door. Push the moving frame 10, and the manhole cover 31 can be driven to move out of the high-pressure heater and sent to the placement area.

[0053] Two symmetrically arranged positioning holes 33 are formed on the side of the manhole cover 31 close to the transmission rod 20. A crossbar 50 is arranged on the transmission rod 20 near the high-pressure heater 40. The crossbar 50 is connected to the manhole cover 31 by bolts 51. One end of the bolt 51 is threadedly connected to the positioning hole 33, and the other end of the bolt 51 passes through the crossbar 50 and is fixed by a nut.

[0054] Before disassembling the manhole cover 31, first pass the transmission rod 20 through the crossbar 50, then connect the disassembly block 32 on the manhole cover 31 to the protrusion 22 through the second transmission pin 24. The part of the transmission pin 24 outside the disassembly block 32 is fixed by a nut. Then, pass the bolt 51 through the manhole cover 31 and threadedly connect it to the positioning hole 33 for fixation. The bolt 51 outside the crossbar 50 is fixed by a nut. Then, the transmission rod 20 can be rotated to drive the manhole cover 31 to rotate and be removed.

[0055] The cross-section of the operating handwheel 21 is in an L-shaped structure. The vertical part of the L-shaped structure is fixedly connected to the end of the transmission rod 20 through a fixing bolt 25.

[0056] The actuator includes:

[0057] An actuator body 60, and both ends of the actuator body 60 are installed on the moving frame 10;

[0058] A transmission shaft 61, the top end of the transmission shaft 61 passes through the execution body 60 and is threadedly connected to the execution body 60, and the bottom end of the transmission shaft 61 extends into the top end of the suspension device.

[0059] A handwheel 62 is arranged on one side of the execution body 60, and the handwheel 62 is connected to the transmission shaft 61 through two meshing sector gears.

[0060] The suspension device includes:

[0061] A suspension main body 70, a connection hole 71 is formed by inward depression in the middle of the top end of the suspension main body 70, and the transmission shaft 61 can extend into the connection hole 71;

[0062] A suspension rod 72, the top end of the suspension rod 72 is connected to the bottom end of the suspension main body 70, a third through hole 73 is formed at the bottom of the suspension rod 72, and the transmission rod 20 passes through the third through hole 73.

[0063] A fourth through hole 74 is formed at the top of the side wall of the suspension main body 70, the fourth through hole 74 communicates with the connection hole 71, a second transmission pin 75 is inserted in the fourth through hole 74, the second transmission pin 75 also passes through the transmission shaft 61 located in the connection hole 71, and the part of the second transmission pin 75 located outside the suspension main body 70 is fixed by a nut.

[0064] The suspension main body 70 and the suspension rod 72 are used to detachably connect the execution body 60 and the transmission rod 20, and are assembled and disassembled with the two for use.

[0065] The moving frame 10 includes two symmetrically arranged L-shaped brackets 12. The ends of the two L-shaped brackets 12 close to each other extend into both ends of the execution body 60. The bottom ends of the two L-shaped brackets 12 are connected to the middle of the top surface of the bottom plate 13, and the universal wheels 11 are installed on the bottom surface of the bottom plate 13. The ends of the L-shaped brackets 12 extending into the execution body 60 are connected by connecting bolts 14. The connecting bolts 14 pass through the L-shaped brackets 12 and extend into the top of the execution body 60. Both ends of the connecting bolts 14 extend out of the execution body 60 respectively and are fixed by nuts. A plurality of rib plates 15 are arranged between the bottom of the L-shaped brackets 12 and the bottom plate 13.

[0066] The universal wheels 11 of the moving frame 10 have a self-locking function, so that when removing the manhole cover 31, the device of the present application can avoid the situation that the universal wheels 11 roll and drive the whole to move at the preset position, ensuring the smooth progress of the work of removing the manhole cover 31.

[0067] The manhole cover removal process includes the following steps:

[0068] 1. Connect the transmission shaft 61 of the actuator to the suspension main body 71 through the second transmission pin 75, and install fixing nuts at both ends of the second transmission pin 75.

[0069] 2. Push the moving frame 10 to move the device of the present application to the maintenance area of the manhole cover 31 of the high-pressure heater 40.

[0070] 3. When the actuator main body 60 rotates forward by the motor, it drives the transmission shaft 61 to move upward. When the motor rotates reversely, it drives the transmission shaft 61 to move downward, and the horizontal height of the device is adjusted by the actuator main body 60. When the actuator main body 60 fails or loses power, the handwheel 62 can be used to adjust the horizontal height of the device. Rotating clockwise drives the transmission shaft 61 to move upward, and rotating counterclockwise drives the transmission shaft 61 to move downward. The actuator main body 60 can accurately adjust the height of the device so that the transmission rod 20 can smoothly enter the manhole of the high-pressure heater 40.

[0071] 4. By operating the handwheel 21, the protrusion 22 at the end of the transmission rod 20 passes through the hole on the crossbar 50 and is connected to the disassembly block 30 on the manhole cover 31 through the second transmission pin 23, and fixing nuts are installed at both ends of the second transmission pin 23 through the gap between the outer edge of the crossbar 50 and the manhole door.

[0072] 5. Loosen the bolt 51 on the manhole cover 31 and remove the crossbar 50.

[0073] 6. Push the moving frame 10 to push the manhole cover 31 into the water chamber of the high-pressure heater 40.

[0074] 7. Rotate the manhole cover 90° so that the long elliptical direction of the elliptical manhole cover 31 is perpendicular to the installation direction of the manhole cover 31;

[0075] 8. Place the manhole cover 31 flat inside the high-pressure heater 40, and push the moving frame 10 to transport the manhole cover 31 out of the high-pressure heater 40.

[0076] 9. Continue to push the moving frame 10 to send the manhole cover 31 to the placement area.

[0077] The installation procedure of the manhole cover includes the following steps:

[0078] 1. Check and clean the installation sealing surface of the manhole cover 31 and the manhole door of the high-pressure heater 40, and replace with a new gasket.

[0079] 2. Connect and fix the manhole cover 31 and the transmission rod 20 firmly.

[0080] 3. Push the moving frame 10 to send the manhole cover 31 to the manhole door of the high-pressure heater 40.

[0081] 4. Rotate the handwheel 62 to adjust the horizontal height of the adjusting device. Rotating clockwise drives the transmission shaft 61 to move upward, and rotating counterclockwise drives the transmission shaft 61 to move downward. The execution body 60 can accurately adjust the height of the device so that the transmission rod 20 can smoothly enter the manhole of the high-pressure heater 40.

[0082] 5. Horizontally place the oval manhole cover 31 with the long oval direction perpendicular to the manhole cover installation direction, and push the manhole cover 31 into the high-pressure heater 40.

[0083] 6. Rotate the manhole cover 31 by 90° and stand it up, then withdraw the device of the present application outward to make the manhole cover 31 press the gasket.

[0084] 7. Just install the bolts 51, crossbeams 50 and nuts on the manhole cover 31.

[0085] During the use of the device of the present application, attention should be paid to applying molybdenum disulfide grease at the thread to reduce damage to the thread; the suspension device should be kept stable to prevent impact on the sealing surface. When idle, it should be placed at the designated position and covered with a tarpaulin to prevent parts from falling into dust and other sundries. In this way, the sufficient service life of the device can be guaranteed, and the requirement of repeated use can be met.

[0086] The present application satisfies the disassembly and installation work of the manhole cover of the high-pressure heater; during use, the manhole cover can be lifted out of the high-pressure heater at any time, meeting the safety requirements for personnel and equipment during the maintenance process of the high-pressure heater; it can reduce the damage to the surrounding finished products (such as insulation, ground, sealing surface of the manhole cover of the high-pressure heater, manhole cover of the high-pressure heater, etc.) of the high-pressure heater, and correspondingly reduce the repair work of the finished products; it can conveniently and quickly carry out the maintenance work of the high-pressure heater. It only takes 2 to 3 people (within 30 minutes) to complete the disassembly of the manhole cover. Compared with not using this device, the maintenance time is shortened by about 4 hours, improving the maintenance efficiency; during the process of disassembling the manhole cover, the manhole cover is firmly locked throughout the process and lifted out of the high-pressure heater to avoid the manhole cover falling into the pipeline below the water chamber of the high-pressure heater; during the process of transporting the manhole cover in and out of the high-pressure heater, by rotating the direction of the manhole cover, the long oval direction passes through the maintenance hole of the high-pressure heater, avoiding the collision between the manhole cover and the sealing surface on the maintenance hole, so the event of leakage of the high-pressure heater caused by damage to the sealing surface will not occur.

[0087] The device of the present application is applicable to the disassembly, assembly and transportation of manhole covers of various types of high-pressure heaters, meeting the requirements for the disassembly and assembly of manhole covers of high-pressure heaters, and making the maintenance work of high-pressure heaters efficient and convenient; it can effectively avoid damage to the equipment, facilities and finished products around the high-pressure heater; the device of the present application has a simple structure, low manufacturing cost, simple use and maintenance, and can be repeatedly used for a long time if properly stored daily; the supporting use of each component of the device of the present application greatly improves the efficiency of the disassembly, assembly and transportation of the manhole cover of the high-pressure heater, shortens the maintenance period and labor cost, etc., and ensures the personal and equipment safety during the construction operation process.

[0088] Those skilled in the art should understand that the present utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and the descriptions in the specification only illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A device for disassembling, assembling, transporting the manhole end cover of a high-pressure heater, characterized in that, Comprising: A mobile frame (10), the bottom end of the mobile frame (10) being provided with universal wheels (11); An actuator, the actuator being installed in the middle of the top end of the mobile frame (10); A suspension device, the top end of the suspension device being connected to the actuator; A transmission rod (20), the transmission rod (20) passing through the bottom of the suspension device, one end of the transmission rod (20) being provided with an operating handwheel (21), the other end of the transmission rod (20) being provided with a protrusion (22), the middle of the top surface of the protrusion (22) being recessed inward to form a first through hole (23), the protrusion (22) being capable of being inserted between two disassembly blocks (30), the two disassembly blocks (30) being symmetrically arranged in the middle of the outer wall of the manhole cover (31), the middle of the top surface of the two disassembly blocks (30) being recessed inward to form a second through hole (32), and the two disassembly blocks (30) and the protrusion (22) being connected by a first transmission pin (24) inserted through the first through hole (23) and the second through hole (32).

2. The disassembly, assembly, and transportation device for the manhole end cover of a high-pressure heater according to claim 1, wherein: On the side of the manhole cover (31) close to the transmission rod (20), two symmetrically arranged positioning holes (33) are provided. On the part of the transmission rod (20) close to the high-pressure heater (40), a cross arm (50) is provided. The cross arm (50) is connected to (31) by bolts (51). One end of the bolt (51) is threadedly connected to the positioning hole (33), and the other end of the bolt (51) passes through the cross arm (50) and is fixed by a nut.

3. The disassembly, assembly, and transportation device for the manhole end cover of a high-pressure heater according to claim 1, characterized in that: The cross-section of the operating handwheel (21) is in an L-shaped structure, and the vertical part of the L-shaped structure is fixedly connected to the end of the transmission rod (20) by a fixing bolt (25).

4. A disassembly, assembly, and transportation device for the manhole end cover of a high-pressure heater according to claim 1, characterized in that: The actuator includes: An actuator main body (60), both ends of the actuator main body (60) being mounted on the mobile frame (10); A transmission shaft (61), the top end of the transmission shaft (61) passing through the actuator main body (60) and being threadedly connected to the actuator main body (60), and the bottom end of the transmission shaft (61) extending into the top end of the suspension device.

5. A disassembly, assembly, and transportation device for the manhole end cover of a high-pressure heater according to claim 4, characterized in that: On one side of the actuator main body (60), a handwheel (62) is provided, and the handwheel (62) is connected to the transmission shaft (61) by two meshing sector gears.

6. The disassembly, assembly, and transportation device for the manhole end cover of a high-pressure heater according to claim 5, characterized in that: The suspension device includes: A suspension main body (70), the middle of the top end of the suspension main body (70) being recessed inward to form a connection hole (71), and the transmission shaft (61) being capable of extending into the connection hole (71); A suspension rod (72), the top end of the suspension rod (72) being connected to the bottom end of the suspension main body (70), and the bottom of the suspension rod (72) being provided with a third through hole (73), and the transmission rod (20) passing through the third through hole (73).

7. A disassembly, assembly, and transportation device for the manhole end cover of a high-pressure heater according to claim 6, characterized in that: At the top of the side wall of the suspension main body (70), a fourth through hole (74) is provided, the fourth through hole (74) communicating with the connection hole (71), a second transmission pin (75) being inserted through the fourth through hole (74), the second transmission pin (75) also passing through the transmission shaft (61) located in the connection hole (71), and the part of the second transmission pin (75) located outside the suspension main body (70) being fixed by a nut.

8. A device for disassembling, assembling, and transporting the manhole end cover of a high-pressure heater according to claim 5, characterized in that: The moving frame (10) includes two symmetrically arranged L-shaped brackets (12). The ends of the two L-shaped brackets (12) that are close to each other extend into both ends of the execution body (60). The bottom ends of the two L-shaped brackets (12) are connected to the middle of the top surface of the bottom plate (13). The universal wheels (11) are installed on the bottom surface of the bottom plate (13).

9. The disassembly, assembly, and transportation device for the manhole end cover of a high-pressure heater according to claim 8, wherein: The ends of the L-shaped brackets (12) that extend into the execution body (60) are connected by connecting bolts (14). The connecting bolts (14) pass through the L-shaped brackets (12) and extend into the top of the execution body (60). Both ends of the connecting bolts (14) extend out of the execution body (60) respectively and are fixed by nuts.

10. A disassembly, assembly, and transportation device for the manhole end cover of a high-pressure heater according to claim 9, characterized in that: A plurality of rib plates (15) are arranged between the bottom of the L-shaped bracket (12) and the bottom plate (13).

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