A rotary excavating cover for a shaft seal

Abstract

The application discloses a shaft sealing cover rotary excavation cover and relates to the technical field of shaft construction. The shaft sealing cover rotary excavation cover comprises a rotary excavation cover body used for sealingly mounting above a sealing cover, the rotary excavation cover body comprises a plurality of cover walls, the plurality of cover walls are connected with each other and form a cuboid structure with an open bottom, the cover wall comprises a cover wall plate and a cover wall plate reinforcing frame fixed to the outer surface of the cover wall plate, the cover wall plates of any two adjacent cover walls are sealingly connected, and the cover wall plate reinforcing frames of any two adjacent cover walls are fixedly connected. The shaft sealing cover rotary excavation cover provided by the application has the cuboid structure of the rotary excavation cover body, avoids the annular gap area formed by the spherical structure on the sealing cover, the side surface of the rotary excavation cover body can be closely combined with the side surface of other equipment on the sealing cover, more space is provided for the installation or construction operation of other equipment, the space waste on the sealing cover is reduced, and the space utilization rate is improved.

Description

Technical Field

[0001] This application relates to the field of shaft construction technology, specifically to a shaft sealing cover rotary excavation cover. Background Technology

[0002] Vertical shafts are important well-shaped passages in underground engineering. With upright walls, they primarily connect the surface and underground spaces, enabling the vertical transport of personnel, equipment, and materials, as well as ventilation and drainage. In shaft construction, the pneumatic caisson method is a common construction technique. This method involves installing a sealed cover at the bottom of the shaft, forming an airtight chamber with the cover, shaft walls, and excavation face. By inflating the chamber, air pressure is used to expel groundwater from the shaft to the surrounding rock strata, creating a dry working environment within the chamber, facilitating excavation of the soil and rock within the shaft.

[0003] Rotary drilling rigs are key equipment for excavating soil and rock inside wells. However, due to space constraints, parts of the rotary drilling rig often need to penetrate the sealing cover and be placed on top of it. To maintain the airtightness of the airtight chamber, prevent gas leakage, and ensure the normal operation of the pneumatic caisson construction, a rotary drilling cover needs to be installed on the sealing cover to enclose the rotary drilling rig.

[0004] Currently, rotary drilling hoods typically employ an integral spherical structure. While this offers good pressure resistance, it also presents several drawbacks: 1. The surface of the spherical rotary drilling hood is curved. When installed on the sealing cover, a circular contact surface forms at the bottom. In the equipment layout above the sealing cover, an annular void area is created around the spherical rotary drilling hood. This area cannot be used for installing other equipment or performing other construction operations, resulting in low space utilization on the sealing cover. 2. The fabrication of the spherical structure requires complex processes and equipment. For example, CNC machining equipment is needed to manufacture the spherical curved surface. Furthermore, the welding process for the spherical structure is also complex, requiring high-precision welding techniques to ensure the integrity and sealing of the spherical structure. These complex fabrication and welding processes not only increase construction costs but also extend the construction period. Utility Model Content

[0005] The purpose of this application is to provide a rotary drilling cover for a vertical shaft sealing cover, which solves the problem of low space utilization on the sealing cover caused by the existing spherical rotary drilling cover.

[0006] The technical solution adopted by this application to solve its technical problem is:

[0007] A rotary drilling hood for sealing a shaft includes a rotary drilling hood body for sealing an installation above a sealing cover. The rotary drilling hood body includes a plurality of hood walls, which are interconnected to form a cubic structure with a bottom opening. Each hood wall includes a hood wall panel and a hood wall panel reinforcing frame fixed to the outer surface of the hood wall panel. The hood wall panels of any two adjacent hood walls are sealed together, and the hood wall panel reinforcing frames of any two adjacent hood walls are fixedly connected.

[0008] Furthermore, the wall panel reinforcement frame includes several parallelly arranged transverse keels and several parallelly arranged longitudinal keels, wherein the transverse keels and the longitudinal keels are perpendicular to each other and connected together.

[0009] Furthermore, the transverse keel and the longitudinal keel of the cover panel include channel steel, I-beam steel or H-beam steel.

[0010] Furthermore, the rotary drilling hood body includes a first body and a second body that are detachably and sealed from top to bottom. The first body has a bottom opening structure, and the second body has openings at both the top and bottom ends.

[0011] Furthermore, a first doorway is provided on one of the vertically arranged walls of the rotary drilling hood body, and a first door that can be opened and closed is provided at the first doorway.

[0012] Furthermore, the external sealing connection of the rotary drilling hood body is a maintenance transition chamber that covers the first doorway. The inner cavity of the maintenance transition chamber is connected to the inner cavity of the rotary drilling hood body through the first doorway. The maintenance transition chamber is provided with a second doorway, and a second door that can be opened and closed is provided at the second doorway.

[0013] Furthermore, the second doorway is positioned directly opposite the first doorway.

[0014] Furthermore, the maintenance transition compartment includes several bulkheads, which are interconnected to form a cubic structure. Each bulkhead includes a bulkhead panel and a bulkhead panel reinforcement frame fixed to the outer surface of the bulkhead panel. The bulkhead panels of any two adjacent bulkheads are sealed together, and the bulkhead panel reinforcement frames of any two adjacent bulkheads are fixedly connected.

[0015] Furthermore, the bulkhead reinforcement frame includes several parallel-arranged transverse bulkhead keels and several parallel-arranged longitudinal bulkhead keels, wherein the transverse bulkhead keels and the longitudinal bulkhead keels are perpendicular to each other and connected together.

[0016] Furthermore, the transverse keel and the longitudinal keel of the bulkhead panel include channel steel, I-beam steel or H-beam steel.

[0017] The beneficial effects of this application are:

[0018] 1. The rotary drilling hood for sealing shafts provided in this application embodiment, by setting a rotary drilling hood body with a cubic structure surrounded by several hood walls, avoids the annular gap area formed by the spherical structure on the sealing cover when the rotary drilling hood body is installed on the sealing cover. This allows the side of the rotary drilling hood body to fit tightly with the side of other equipment on the sealing cover, providing more space for the installation or construction operation of other equipment, reducing space waste on the sealing cover, and improving space utilization.

[0019] 2. The rotary drilling cover for vertical shaft sealing provided in this application embodiment, by setting the cover wall as a cover wall plate and a cover wall plate reinforcing frame fixed to the outside of the cover wall plate, can enhance the rigidity and bearing capacity of the cover wall plate, thereby enhancing the structural strength of the cover wall. The processing of this cover wall is relatively simple, and it does not require complex CNC machining equipment to manufacture curved surfaces, reducing processing difficulty and cost, and shortening the construction cycle. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of the rotary drilling cover for the vertical shaft sealing cover provided in the embodiments of this application;

[0022] Figure 2 This is another perspective view of the rotary drilling cover for the shaft sealing cover provided in the embodiments of this application;

[0023] Figure 3 This is a front view of the rotary drilling cover for the shaft sealing cap provided in the embodiments of this application;

[0024] Figure 4 yes Figure 3 A sectional view along line AA.

[0025] Figure 5 yes Figure 3 Sectional view along line BB;

[0026] Figure 6 This is a 3D view of the rotary drilling hood installed on the sealing cover;

[0027] Figure 7 This is a three-dimensional view of the rotary drilling hood installed on the sealing cover from another perspective.

[0028] Figure label:

[0029] 10-Sealing cap; 101-Mounting hole; 102-Manhole;

[0030] 20 - Rotary drilling hood body;

[0031] 21-Cover wall;

[0032] 211-Wall panel;

[0033] 212 - Reinforcing frame for the wall panel; 2121 - Horizontal keel for the wall panel; 2122 - Longitudinal keel for the wall panel;

[0034] 213 - First Gate;

[0035] 22-First Body; 23-Second Body; 24-First Gate;

[0036] 30 - Overhaul the transition cabin;

[0037] 31-Bushead;

[0038] 311 - Bulkhead;

[0039] 312 - Bulkhead reinforcement frame; 3121 - Bulkhead transverse keel; 3122 - Bulkhead longitudinal keel;

[0040] 32 - Second door. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0042] In the description of this application, the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and 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 this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] See Figure 1 , Figure 2 , Figure 6 , Figure 7 This application provides a shaft sealing cover rotary drilling cover, including a rotary drilling cover body 20 for sealing and installing above a sealing cover 10. The rotary drilling cover body 20 includes a plurality of cover walls 21, which are interconnected to form a cubic structure with a bottom opening. Each cover wall 21 includes a cover wall plate 211 and a cover wall plate reinforcing frame 212 fixed to the outer surface of the cover wall plate 211. The cover wall plates 211 of any two adjacent cover walls 21 are sealed and connected, and the cover wall plate reinforcing frames 212 of any two adjacent cover walls 21 are fixedly connected.

[0045] See Figure 6 , Figure 7 The sealing cover 10 is a circular flat plate structure, the size of which matches the cross-sectional dimensions of the shaft to ensure that it covers the shaft opening. The sealing cover 10 can be made of high-strength steel and has a pre-drilled mounting hole 101 for the rotary drilling mechanism to pass through. The bottom of the rotary drilling hood body 20 is sealed to the sealing cover 10 by a bolt and washer structure, so that the inner cavity of the rotary drilling hood body 20 communicates with the mounting hole 101.

[0046] See Figure 1 , Figure 2 The rotary drilling hood body 20 includes several hood walls 21, which are interconnected to form a cubic structure with an open bottom. Each hood wall 21 includes a hood wall panel 211 and a hood wall panel reinforcing frame 212. The hood wall panel 211 can be made of high-strength steel plate, and its thickness can be determined according to actual construction requirements. Several hood wall panels 211 are interconnected to form a cubic structure with an open bottom. The hood wall panel reinforcing frame 212 can be made of structural steel and welded to the outer surface of the hood wall panel 211 to enhance the rigidity and bearing capacity of the hood wall panel 211, thereby enhancing the structural strength of the hood wall 21. Adjacent hood wall panel reinforcing frames 212 are connected together, further enhancing the structural strength of the entire rotary drilling hood body 20.

[0047] In this embodiment, the rotary drilling hood body 20 includes five hood walls 21, namely four vertically arranged side walls and one horizontally arranged top wall, each hood wall 21 being rectangular in shape; the hood wall plates 211 of the five hood walls 21 are connected together by welding to form a cubic cavity with an open bottom inside; the hood wall plate reinforcing frames 212 of the five hood walls 21 are connected together by welding or bolting to form an integral reinforcing structure on the outside of the hood wall plates 211, further increasing the overall structural strength of the rotary drilling hood body 20.

[0048] The rotary drilling hood for vertical shaft sealing provided in this embodiment, by setting a cubic rotary drilling hood body 20 surrounded by several hood walls 21, avoids the annular gap area formed by the spherical structure on the sealing cover 10 after the rotary drilling hood body 20 is installed on the sealing cover 10. This allows the side of the rotary drilling hood body 20 to fit tightly with the side of other equipment on the sealing cover 10, providing more space for the installation or construction operation of other equipment, reducing space waste on the sealing cover 10, and improving the space utilization rate of the sealing cover 10. By setting the hood walls 21 as hood wall plates 211 and hood wall plate reinforcing frames 212 fixed to the outside of the hood wall plates 211, the hood wall plate reinforcing frames 212 can enhance the rigidity and bearing capacity of the hood wall plates 211, thereby enhancing the structural strength of the hood walls 21. The processing of this hood wall 21 is relatively simple, without the need for complex CNC machining equipment to manufacture curved surfaces, reducing processing difficulty and cost, and shortening the construction cycle.

[0049] In some embodiments, see Figure 1 , Figure 2 The wall panel reinforcement frame 212 includes several parallel wall panel transverse keels 2121 and several parallel wall panel longitudinal keels 2122. The wall panel transverse keels 2121 and the wall panel longitudinal keels 2122 are perpendicular to each other and connected together.

[0050] The transverse keel 2121 of the wall panel can be made of channel steel, I-beam, or H-beam, and its length direction is parallel to the length direction of the wall panel 211. The longitudinal keel 2122 of the wall panel can be made of channel steel, I-beam, or H-beam, and its length direction is parallel to the width direction of the wall panel 211. The distance between adjacent transverse keels 2121 and adjacent longitudinal keels 2122 of the wall panel should be set according to strength calculations, and no specific limitation is made here.

[0051] Correspondingly, the transverse keel 2121 and the longitudinal keel 2122 of the cover panel are perpendicular to each other and connected together to form a grid-like cover panel reinforcement frame 212. The transverse keel 2121 of the cover panel enhances the stiffness of the cover panel 211 in the length direction, while the longitudinal keel 2122 of the cover panel enhances the stiffness of the cover panel 211 in the width direction. Through this mutually perpendicular arrangement, the cover panel reinforcement frame 212 can strengthen the cover panel 211 from multiple directions, thereby enhancing the overall structural strength of the cover panel 21.

[0052] In some embodiments, see Figure 3 The rotary drilling hood body 20 includes a first body 22 and a second body 23 that are detachably and sealingly connected from top to bottom. The first body 22 has a bottom opening structure, and the second body 23 has openings at both the top and bottom ends. For example, a sealing gasket can be provided at the connection between the first body 22 and the second body 23, and they can be connected together by bolts.

[0053] Correspondingly, by setting the rotary drilling hood body 20 as the first body 22 and the second body 23, the first body 22 and the second body 23 can be transported separately during transportation, thereby avoiding the problem of excessive transportation costs due to excessive height; during installation, the first body 22 and the second body 23 can be hoisted separately, reducing the weight of a single hoisting, making the hoisting process safer and more stable, and reducing the risks during the hoisting process.

[0054] See Figure 6 , Figure 7 A manhole 102 may be provided on the sealing cover 10 so that operators can enter the airtight chamber and the inner cavity of the rotary drilling hood body 20 through the manhole 102 to perform related operations. The manhole 102 shall be equipped with a corresponding manhole cover to open and close the manhole 102.

[0055] In some embodiments, see Figure 4 , Figure 5 The rotary drilling hood body 20 has a first doorway 213 on one of its vertically arranged wall 21s, and a first door 24 that can be opened and closed is provided at the first doorway 213.

[0056] Specifically, the first doorway 213 is rectangular in shape, and its size is designed according to the needs of operators and equipment entering and exiting. In this embodiment, the first doorway 213 is located on one side of the second body 23, which facilitates the operation and maintenance of operators entering and exiting the inner cavity of the rotary drilling hood body 20.

[0057] The first door 24 is installed at the first doorway 213 to enable the opening and closing of the first doorway 213. The first door 24 may be made of high-strength steel plate, and its size is matched with the first doorway 213 to ensure that the first door 24 can completely cover the first doorway 213 when closed.

[0058] In this embodiment, one side of the first door 24 is connected to the cover wall 21 via two vertically arranged first hinges, allowing the first door 24 to open and close around the first hinges. A first sealing gasket is provided on the inner edge of the first door 24; when the first door 24 is closed, the first sealing gasket fits tightly against the cover wall 21 to prevent gas leakage. A first locking device is provided on the other side of the first door 24; when the first door 24 is closed, the first locking device securely locks the first door 24 to the cover wall 21. The first locking device can be a bolt, pin, or other mechanical locking mechanism to ensure that the first door 24 will not be accidentally opened due to pressure difference or vibration during the construction of the pneumatic caisson.

[0059] Correspondingly, by setting the first doorway 213 and the first door 24 on the cover wall 21 of the rotary drilling hood body 20, a convenient access passage is provided for the operators, eliminating the need to enter the inner cavity of the rotary drilling hood body 20 through other complicated means, thereby improving construction efficiency.

[0060] In some embodiments, see Figure 1 , Figure 2 , Figure 3 The rotary drilling hood body 20 is externally sealed with a maintenance transition chamber 30 that covers the first doorway 213. The inner cavity of the maintenance transition chamber 30 is connected to the inner cavity of the rotary drilling hood body 20 through the first doorway 213. The maintenance transition chamber 30 is provided with a second doorway 313, and a second door 32 that can be opened and closed is provided at the second doorway 313.

[0061] Specifically, the maintenance transition compartment 30 is an independent compartment whose dimensions are designed according to actual needs to ensure sufficient space for operators to enter and exit. The maintenance transition compartment 30 is installed on the outside of the rotary drilling hood body 20 using sealing gaskets and bolts to ensure the sealing of the connection points. The inner cavity of the maintenance transition compartment 30 communicates with the inner cavity of the rotary drilling hood body 20 through the first doorway 213, providing operators with a transition space to facilitate access to the inner cavity of the rotary drilling hood body 20 for operation and maintenance.

[0062] The maintenance transition compartment 30 has a second doorway 313 on its side wall. This doorway is rectangular in shape and similar in size to the first doorway 213, facilitating personnel access to and from the maintenance transition compartment 30. A second door 32 is installed at the second doorway 313 to allow for its opening and closing. The second door 32 can be made of high-strength steel plate, and its dimensions match those of the second doorway 313, ensuring that the second door 32 completely covers the second doorway 313 when closed.

[0063] In this embodiment, one side of the second door 32 is connected to the side wall of the maintenance transition chamber 30 via two vertically arranged second hinges, allowing the second door 32 to open and close around the second hinges. A second sealing gasket is provided on the inner edge of the second door 32. When the second door 32 is closed, the second sealing gasket fits tightly against the side wall of the maintenance transition chamber 30 to prevent gas leakage. A second locking device is provided on the other side of the second door 32. When the second door 32 is closed, the second locking device securely locks the second door 32 to the side wall of the maintenance transition chamber 30. The second locking device can be a bolt, pin, or other mechanical locking mechanism to ensure that the second door 32 will not be accidentally opened due to pressure differences or vibration during the construction of the pneumatic caisson.

[0064] The process of operators entering and exiting the inner cavity of the rotary drilling hood body 20 is as follows: The first door 24 is closed, and the second door 32 is open. The operator passes through the second doorway 313 into the maintenance transition chamber 30. The second door 32 is closed, and the maintenance transition chamber 30 is pressurized to the same pressure as the airtight chamber. The first door 24 is opened, and the operator passes through the first doorway 213 into the inner cavity of the rotary drilling hood body 20 to perform relevant operations. After the operations are completed, the operator passes through the first doorway 213 into the maintenance transition chamber 30. The first door 24 is closed, and the maintenance transition chamber 30 is depressurized to the same pressure as the external atmospheric pressure. The second door 32 is opened, and the operator passes through the second doorway 313 to leave the maintenance transition chamber 30.

[0065] Correspondingly, the maintenance transition chamber 30 provides a transition space, enabling operators to operate more safely when entering and leaving the rotary drilling hood body 20. Through the cooperation of the first door 24 and the second door 32, it can effectively prevent rapid changes in air pressure during the entry and exit of operators, reducing safety risks caused by air pressure differences.

[0066] In some embodiments, the second doorway 313 is arranged directly opposite the first doorway 213. Accordingly, by arranging the second doorway 313 directly opposite the first doorway 213, when operators enter the maintenance transition compartment 30 through the second doorway 313, they can directly face the first doorway 213 without having to perform special operations or adjust their posture in the narrow maintenance transition compartment 30. They can quickly enter the inner cavity of the rotary drilling hood body 20 for operation. This straight-line passage method greatly reduces the time and physical exertion of operators entering and exiting, and improves work efficiency.

[0067] In some embodiments, see Figure 1 , Figure 2The maintenance transition compartment 30 includes several bulkheads 31, which are interconnected to form a cubic structure. Each bulkhead 31 includes a bulkhead plate 311 and a bulkhead plate reinforcing frame 312 fixed to the outer surface of the bulkhead plate 311. The bulkhead plates 311 of any two adjacent bulkheads 31 are sealed together, and the bulkhead plate reinforcing frames 312 of any two adjacent bulkheads 31 are fixedly connected.

[0068] The maintenance transition compartment 30 includes several bulkheads 31, which are interconnected to form a cubic structure. Each bulkhead 31 includes a bulkhead plate 311 and a bulkhead plate reinforcing frame 312. The bulkhead plate 311 can be made of high-strength steel plate, and its thickness can be determined according to actual construction requirements. The bulkhead plate reinforcing frame 312 can be made of structural steel and welded to the outer surface of the bulkhead plate 311 to enhance the rigidity and pressure-bearing capacity of the bulkhead plate 311, thereby enhancing the structural strength of the bulkhead 31.

[0069] In this embodiment, the maintenance transition compartment 30 includes four bulkheads 31, each of which is rectangular in shape. The four bulkheads 31 are connected end to end to form a cubic structure with openings at both ends. One end of the opening covers the first doorway 213 and is sealed to the side wall of the rotary drilling hood body 20. The other end of the opening forms a second doorway 313. Accordingly, the maintenance transition compartment 30 with this structure is relatively simple to manufacture, reducing the manufacturing difficulty.

[0070] In some embodiments, see Figure 1 , Figure 2 The bulkhead reinforcement frame 312 includes several parallel-arranged transverse bulkhead keels 3121 and several parallel-arranged longitudinal bulkhead keels 3122. The transverse bulkhead keels 3121 and the longitudinal bulkhead keels 3122 are perpendicular to each other and connected together.

[0071] The transverse ribs 3121 of the bulkhead panel can be made of channel steel, I-beams, or H-beams, and their length direction is parallel to the length direction of the bulkhead panel 311. The longitudinal ribs 3122 of the bulkhead panel can be made of channel steel, I-beams, or H-beams, and their length direction is parallel to the width direction of the bulkhead panel 311. The distance between adjacent transverse ribs 3121 and adjacent longitudinal ribs 3122 of the bulkhead panel can be set according to strength calculations, and no specific limitation is made here.

[0072] Correspondingly, the transverse keel 3121 and the longitudinal keel 3122 of the bulkhead are perpendicular to each other and connected together to form a grid-like bulkhead reinforcement frame 312. The transverse keel 3121 of the bulkhead serves to enhance the stiffness of the bulkhead 311 in the length direction, while the longitudinal keel 3122 of the bulkhead serves to enhance the stiffness of the bulkhead 311 in the width direction. Through this mutually perpendicular arrangement, the bulkhead reinforcement frame 312 can strengthen the bulkhead 311 from multiple directions, thereby enhancing the overall structural strength of the bulkhead 31.

[0073] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A rotary drilling hood for sealing a shaft, comprising a rotary drilling hood body (20) for sealing an installation above a sealing cover (10), characterized in that, The rotary drilling hood body (20) includes a plurality of hood walls (21), which are interconnected to form a cubic structure with a bottom opening. Each hood wall (21) includes a hood wall panel (211) and a hood wall panel reinforcing frame (212) fixed to the outer surface of the hood wall panel (211). The hood wall panels (211) of any two adjacent hood walls (21) are sealed together, and the hood wall panel reinforcing frames (212) of any two adjacent hood walls (21) are fixedly connected.

2. The shaft sealing cover rotary excavator according to claim 1, characterized in that, The wall panel reinforcement frame (212) includes several parallel wall panel transverse keels (2121) and several parallel wall panel longitudinal keels (2122). The wall panel transverse keels (2121) and the wall panel longitudinal keels (2122) are perpendicular to each other and connected together.

3. The shaft sealing cover rotary excavator according to claim 2, characterized in that, The transverse keel (2121) and longitudinal keel (2122) of the cover panel include channel steel, I-beam or H-beam.

4. The shaft sealing cover rotary excavator according to claim 1, characterized in that, The rotary drilling hood body (20) includes a first body (22) and a second body (23) that are detachably and sealed from top to bottom. The first body (22) has a bottom opening structure, and the second body (23) has openings at both the top and bottom ends.

5. The shaft sealing cover rotary excavator according to claim 1, 2, 3 or 4, characterized in that, The rotary drilling hood body (20) has a first doorway (213) on one of the vertically arranged hood walls (21), and a first door (24) that can be opened and closed is provided at the first doorway (213).

6. The shaft sealing cover rotary excavator according to claim 5, characterized in that, The rotary drilling hood body (20) is externally sealed with a maintenance transition chamber (30) that covers the first doorway (213). The inner cavity of the maintenance transition chamber (30) is connected to the inner cavity of the rotary drilling hood body (20) through the first doorway (213). The maintenance transition chamber (30) is provided with a second doorway (313), and a second door (32) that can be opened and closed is provided at the second doorway (313).

7. The shaft sealing cover rotary excavator according to claim 6, characterized in that, The second doorway (313) is arranged directly opposite the first doorway (213).

8. The shaft sealing cover rotary excavator according to claim 6, characterized in that, The maintenance transition compartment (30) includes several bulkheads (31), which are interconnected to form a cubic structure. Each bulkhead (31) includes a bulkhead panel (311) and a bulkhead panel reinforcement frame (312) fixed to the outer surface of the bulkhead panel (311). The bulkhead panels (311) of any two adjacent bulkheads (31) are sealed together, and the bulkhead panel reinforcement frames (312) of any two adjacent bulkheads (31) are fixedly connected.

9. The shaft sealing cover rotary excavator according to claim 8, characterized in that, The bulkhead reinforcement frame (312) includes several parallel-arranged horizontal bulkhead keels (3121) and several parallel-arranged longitudinal bulkhead keels (3122). The horizontal bulkhead keels (3121) and the longitudinal bulkhead keels (3122) are perpendicular to each other and connected together.

10. The shaft sealing cover rotary excavator according to claim 9, characterized in that, The transverse keel (3121) and longitudinal keel (3122) of the bulkhead panel include channel steel, I-beam or H-beam.

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