Hollow main drive for vertical shaft heading machine and vertical shaft heading machine

Abstract

The invention relates to the technical field of vertical shaft heading machines, in particular to a hollow main drive for a vertical shaft heading machine and the vertical shaft heading machine. The hollow main drive comprises a center channel, a first sealing cavity and a plurality of second sealing cavities; the first sealing cavity comprises a sealing cavity defined by an outer shell, a large flange, a top cover and first sealing assemblies, the outer shell is arranged on the outer side of the large flange in a sleeving mode and rotationally connected with the large flange, the top cover is connected with the outer shell and the large flange, and the first sealing assemblies are arranged between the top cover and the large flange and between the outer shell and the large flange correspondingly; the large flange and the top cover are of hollow structures, and the hollow parts of the large flange and the top cover are coaxially arranged to form a central channel; the second sealing cavity is arranged in the first sealing cavity. By arranging the second sealing cavity and the central channel, the problem of coexistence of slurry deslagging and central mechanical deslagging is solved, the geological adaptability of the vertical shaft heading machine is improved, and the construction cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of shaft boring machines, and in particular to a hollow main drive for a shaft boring machine and the shaft boring machine. Background Art

[0002] A shaft boring machine is a machine used to dig tunnels vertically on the ground. There are many types of shaft boring machines for different geological conditions and application scenarios at different depths, such as full-section shaft boring machines, kilometer-level shaft boring machines, and caisson shaft boring machines.

[0003] In the field of shaft boring machine construction, caisson-type shaft boring machines are mainly used for shallow shafts with a construction depth of less than 100 meters inside the city, such as underground stereo garages, shield starting / receiving shafts, deep tunnel drainage shafts and other municipal shafts. The caisson-type shaft boring machine fully mechanizes the traditional caisson method of shaft construction, using prefabricated pipe segments suspended and sunk combined with fully automatic underwater excavation technology, replacing the traditional caisson that relies on self-weight sinking and buckets and suction sludge excavation technology, greatly improving the construction efficiency and adaptability of the caisson method. However, as the application scope of caisson-type shaft boring machines expands, the geological conditions encountered have become more complex and changeable. Even for the same shaft project, it is necessary to face a variety of geological conditions such as soil layers, sand and gravel, and rock layers at the same time. However, almost all caisson-type (also known as sinking) shaft boring machines use mud and water to discharge slag. Due to the limitations of the diameter of the slurry discharge pipe and the slag discharge capacity of the mud pump, this type of shaft boring machine is difficult to cope with large-diameter pebbles or boulder formations, and its application scope is limited. At the same time, in some water-scarce areas, the mud and water slag discharge mode consumes more water resources, increasing construction costs.

[0004] Therefore, the present invention provides a hollow main drive for a shaft boring machine and a shaft boring machine, so as to improve the adaptability and construction flexibility of the shaft boring machine. Summary of the invention

[0005] The object of the present invention is to provide a hollow main drive for a shaft boring machine and a shaft boring machine to solve the technical problems existing in the prior art. The specific technical solution is as follows:

[0006] A hollow main drive for a shaft boring machine comprises a central passage, a first sealed chamber and a plurality of second sealed chambers;

[0007] The first sealed cavity comprises a sealed cavity enclosed by an outer shell, a large flange, a top cover and a first sealing assembly, wherein the outer shell is sleeved on the outside of the large flange and the large flange is rotatably connected to the outer shell, the top cover is connected to the outer shell and the large flange, and the first sealing assembly is respectively arranged between the top cover and the large flange and between the outer shell and the large flange;

[0008] The large flange and the top cover are hollow structures, and the hollow parts of the large flange and the top cover are coaxially arranged to form a central channel;

[0009] The second sealed cavity is arranged in the first sealed cavity and is used for discharging mud to the ground.

[0010] Furthermore, a slewing mechanism is arranged in the first sealed cavity, and the slewing mechanism includes a slewing bearing and a driving unit. The large flange is connected to the outer shell through the slewing bearing, and the driving unit is used for driving the large flange to rotate.

[0011] Furthermore, the second sealing cavity includes a sealing cavity formed by a sealing ring, a second sealing assembly and a large flange, the sealing ring is arranged between the outer shell and the large flange, and the second sealing assembly is arranged between the sealing ring and the large flange.

[0012] Furthermore, the sealing ring includes a sealing ring body and a recessed portion arranged on the sealing ring body, and the recessed portion cooperates with the outer shell and the second sealing assembly to form a second sealing cavity.

[0013] Furthermore, a fixed mud pipe is provided on the sealing ring, and the fixed mud pipe is communicated with the second sealing cavity.

[0014] A shaft boring machine comprises at least one excavation device, a slag discharge mechanism and a hollow main drive as described above, wherein the hollow main drive is connected to a main machine support arm, the main machine support arm is supported on a side wall of the shaft, the excavation device is connected to a large flange, and the slag discharge mechanism enters the bottom of the shaft through a central channel to clean the rock slag.

[0015] Furthermore, the excavation device includes a milling barrel excavation arm, and the milling barrel excavation arm is provided with a mud pump and a movable mud pipe, one end of the movable mud pipe is connected to the mud pump, and the other end is communicated with the second sealing chamber.

[0016] Furthermore, the excavation device includes a bucket-type excavation arm.

[0017] Furthermore, it also includes a drag chain mechanism, one end of which is connected to the large flange, and the other end of which is connected to the mainframe support arm.

[0018] Furthermore, the drag chain mechanism includes a drag chain, an outer bracket of the drag chain and an inner bracket of the drag chain, the outer bracket of the drag chain is connected to the main engine support arm, the inner bracket of the drag chain is connected to the large flange, one end of the drag chain is connected to the inner bracket of the drag chain, and the other end is connected to the outer bracket of the drag chain, and the mud pipe installed inside the drag chain connects the movable mud pipe and the fixed mud pipe.

[0019] The application of the technical solution of the present invention has the following beneficial effects:

[0020] (1) The present invention provides a hollow main drive for a shaft boring machine, comprising a central channel, a first sealed chamber and a plurality of second sealed chambers; the first sealed chamber comprises a sealed chamber enclosed by an outer shell, a large flange, a top cover and a first sealing assembly, the outer shell is sleeved on the outside of the large flange and the large flange is rotatably connected to the outer shell, the top cover is connected to the outer shell and the large flange, and the first sealing assembly is respectively arranged between the top cover and the large flange and between the outer shell and the large flange; the large flange and the top cover are hollow structures, and the hollow parts of the large flange and the top cover are coaxially arranged to form a central channel; the second sealed chamber is arranged in the first sealed chamber, and is used to discharge mud to the ground. The present invention realizes the transportation of mud from the movable mud pipe to the fixed mud pipe by setting a second sealed chamber, and can realize mud and water slag discharge without setting a mud rotary joint, thereby simplifying the structure and reducing the cost. The reserved central channel is convenient for setting a slag discharge mechanism, and mechanical slag discharge of the central channel is realized, thus solving the problem of coexistence of mud slag discharge and central mechanical slag discharge. The two slag discharge methods focus on different strata but complement each other, thereby improving the geological adaptability of the shaft boring machine.

[0021] (2) In the present invention, the hollow main drive can also effectively reduce the weight of the overall structure and reduce the difficulty of lifting.

[0022] (3) In the present invention, by providing the first sealed chamber, mud and water from the outside can be isolated, providing a safe operating environment for the drive unit and control components installed inside the first sealed chamber.

[0023] (4) The present invention also provides a shaft boring machine, comprising at least one excavation device, a slag discharge mechanism and the hollow main drive as described above, wherein the hollow main drive is connected to a main machine support arm, the main machine support arm is supported on the side wall of the shaft, the excavation device is connected to a large flange, and the slag discharge mechanism enters the bottom of the shaft through a central channel to clean up the rock slag. The shaft boring machine provided by the present invention can simultaneously realize muddy water slag discharge and central mechanical slag discharge by adopting a hollow main drive, adopt different slag discharge methods for different strata, or combine two slag discharge methods, solve the problem of efficient slag discharge of pebbles of different particle sizes or different strata, improve the adaptability and construction flexibility of the shaft boring machine, and reduce construction costs.

[0024] (5) The shaft boring machine provided by the present invention adopts the above-mentioned hollow main drive, which can drive various excavation devices such as milling barrel excavation arm and bucket excavation arm to rotate around the shaft axis. The excavation devices can be set separately or simultaneously for different strata to adapt to different strata, thereby improving the adaptability of the shaft boring machine.

[0025] (6) In the present invention, the shaft boring machine further includes a drag chain mechanism, which can realize the transitional transportation of mud from the movable mud pipe to the fixed mud pipe. The drag chain mechanism and the second sealed chamber complement each other to improve the reliability of mud slag discharge.

[0026] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 2 is a schematic structural diagram of a hollow main drive for a shaft boring machine according to an embodiment of the present invention;

[0029] Figure 2(a) is a schematic diagram of the structure of the large flange;

[0030] FIG2( b ) is a schematic diagram of the cross-sectional structure of the large flange;

[0031] FIG3( a ) is a schematic diagram of the structure of a sealing ring in an embodiment of the present invention;

[0032] FIG3( b ) is a schematic cross-sectional view of a sealing ring in an embodiment of the present invention;

[0033] Figure 4 A schematic structural diagram of a shaft boring machine in an embodiment of the present invention;

[0034] Figure 5 is a schematic diagram of a drag chain mechanism in an embodiment of the present invention;

[0035] Among them, 1. outer shell, 2. large flange, 3. top cover, 4. first sealing assembly, 5. slewing mechanism, 5.1. slewing bearing, 5.2. driving unit, 6. sealing ring, 6.1. sealing ring body, 6.2. recessed part, 7. second sealing assembly, 8. fixed mud pipe, 9. main engine support arm, 10. milling barrel type excavation arm, 11. mud pump, 12. movable mud pipe, 13. bucket type excavation arm, 14. drag chain mechanism, 14.1. drag chain, 14.2. drag chain outer bracket, 14.3. drag chain inner bracket; 15. grab bucket. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered.

[0037] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "front", "back", "lateral", "longitudinal" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0039] Example 1

[0040] See also Figure 1 The present embodiment provides a hollow main drive for a shaft boring machine, comprising a central channel A, a first sealed chamber B and a plurality of second sealed chambers C; the first sealed chamber B comprises a sealed chamber formed by an outer shell 1, a large flange 2, a top cover 3 and a first sealing assembly 4, the outer shell 1 is sleeved on the outside of the large flange 2 and the large flange 2 is rotatably connected to the outer shell 1, the top cover 3 is connected to the outer shell 1 and the large flange 2, and the first sealing assembly 4 is respectively arranged between the top cover 3 and the large flange 2 and between the outer shell 1 and the large flange 2. Preferably, in the present embodiment, the first sealing assembly 4 adopts a rubber sealing strip.

[0041] A slewing mechanism 5 is arranged in the first sealed cavity B, and the slewing mechanism 5 includes a slewing bearing 5.1 and a driving unit 5.2. The large flange 2 is connected to the outer shell 1 through the slewing bearing 5.1, and the driving unit 5.2 is used to drive the large flange 2 to rotate. Specifically, the driving unit 5.2 is fixed to the outer shell 1 through a support frame, the outer ring of the slewing bearing 5.1 is connected to the outer shell 1, the inner ring of the slewing bearing 5.1 is connected to the large flange 2, and the driving end of the driving unit 5.2 is connected to the large flange 2, driving the large flange 2 to rotate 0° to 360° relative to the outer shell 1 around the central axis of the large flange 2; in this embodiment, preferably, the driving unit 5.2 includes a driving motor and a reducer.

[0042] In this embodiment, a pipeline rotary drag chain and electro-hydraulic control components are also provided in the first sealed cavity B. By providing the first sealed cavity B, external mud and water can be isolated, providing a safe operating environment for the internal drive unit and control components.

[0043] See also Figure 1 2(a) and 2(b), the large flange 2 and the top cover 3 are hollow structures, and the hollow part of the large flange 2 and the hollow part of the top cover 3 are coaxially arranged to form a central channel A, and the central channel A is used to lower the grab bucket, install a vertical belt conveyor, a bucket elevator or other slag discharge mechanism. Optionally, the shape of the central channel A can be circular, square or other shapes, which can be adjusted according to the needs of different slag discharge mechanisms.

[0044] See also Figure 1 The second sealing chamber C is arranged in the first sealing chamber B, and is used to discharge the mud to the ground. The second sealing chamber C includes a sealing chamber formed by a sealing ring 6, a second sealing assembly 7 and a large flange 2. The sealing ring 6 is arranged between the outer shell 1 and the large flange 2, and the second sealing assembly 7 is arranged between the sealing ring 6 and the large flange 2.

[0045] Referring to Fig. 3(a) and Fig. 3(b), the sealing ring 6 comprises a sealing ring body 6.1 and a recessed portion 6.2 arranged on the sealing ring body 6.1, and the recessed portion 6.2 cooperates with the outer shell 1 and the second sealing component 7 to form a second sealing cavity. The sealing ring body 6.1 is fixedly connected to a support frame on which the drive unit 5.2 is installed. When the large flange 2 rotates, the sealing ring 6 and the outer shell 1 are fixed, and the second sealing component 7 slides relative to the sealing ring 6. Preferably, in this embodiment, the second sealing component 7 adopts a rubber sealing strip, which presses the sliding surface to produce a sealing effect, realizes the sealing between the large flange 2 and the sealing ring 6, and prevents the mud in the second sealing cavity C from entering the first sealing cavity B.

[0046] See also Figure 1-Figure 3(b) A fixed mud pipe 8 is provided on the sealing ring 6, and the fixed mud pipe 8 is communicated with the second sealing chamber C. A movable mud pipe 12 is penetrated through the end of the large flange 2, and the movable mud pipe 12 is communicated with the second sealing chamber C.

[0047] In this embodiment, by setting up a second sealed chamber C, mud can be transported from the movable mud pipe 12 to the fixed mud pipe 8, and mud slag discharge can be achieved without setting up a mud rotary joint, thereby simplifying the structure and reducing costs. The reserved central channel A facilitates the setting of a slag discharge mechanism, realizing mechanical slag discharge through the central channel, thereby solving the problem of coexistence of mud slag discharge and central mechanical slag discharge.

[0048] See also Figure 4The present embodiment also provides a shaft boring machine, comprising at least one excavation device, a slag discharge mechanism and the hollow main drive as described above, wherein the hollow main drive is connected to a main engine support arm 9, and the main engine support arm 9 is supported on the side wall of the shaft, the excavation device is connected to the large flange 2, and rotates with the rotation of the large flange 2, and the slag discharge mechanism enters the bottom of the shaft through the central channel A to realize the cleaning of rock slag.

[0049] The slag discharge mechanism may be a grab bucket 15, a vertical belt conveyor, a wheel bucket elevator or other slag discharge mechanisms. The present embodiment adopts a grab bucket 15.

[0050] In this embodiment, the excavation device includes a milling barrel excavation arm 10, on which a mud pump 11 and a movable mud pipe 12 are provided. One end of the movable mud pipe 12 is connected to the mud pump 11, and the other end is connected to the second sealed chamber B.

[0051] The excavation device also includes a bucket excavation arm 13; in addition to the excavation function, the bucket excavation arm 13 can also gather the excavated debris to the central area. When encountering a large-diameter floating pebble formation, a grab bucket 15 is used to remove the debris. The grab bucket 15 passes through the central channel A of the hollow main drive and enters the bottom of the shaft, and then grabs the rock debris in the central area to the ground.

[0052] In this embodiment, the excavation device can be selected according to the actual construction situation. Only the bucket excavation arm 13 or the milling barrel excavation arm 10 can be selected, or both excavation devices can be used to operate simultaneously.

[0053] The shaft boring machine provided in this embodiment can realize mud slag discharge and central mechanical slag discharge at the same time by adopting a hollow main drive, and adopts different slag discharge methods for different strata, or combines two slag discharge methods to solve the problem of efficient slag discharge of pebbles of different particle sizes or different strata. At the same time, it is equipped with a variety of excavation devices to solve the excavation and slag discharge problems of different strata, improve the adaptability and construction flexibility of the shaft boring machine, and reduce construction costs.

[0054] Example 2

[0055] In this embodiment, see Figure 4 and Figure 5 The shaft boring machine further includes a drag chain mechanism 14 , one end of which is connected to the large flange 2 , and the other end of which is connected to the main machine support arm 9 .

[0056] The drag chain mechanism 14 includes a drag chain 14.1, a drag chain outer bracket 14.2 and a drag chain inner bracket 14.3, wherein the drag chain outer bracket 14.2 is connected to the main engine support arm 9, the drag chain inner bracket 14.3 is connected to the large flange 2, one end of the drag chain 14.1 is connected to the drag chain inner bracket 14.3, and the other end is connected to the drag chain outer bracket 14.2, and the mud pipe installed inside the drag chain 14.1 connects the movable mud pipe 12 and the fixed mud pipe 8. By setting the drag chain mechanism 14, the mud is transported from the movable mud pipe 12 to the fixed mud pipe 8. In this embodiment, the drag chain mechanism 14 and the second sealed chamber complement each other to improve the reliability of mud slag discharge.

[0057] The other structures in this embodiment are the same as those in Embodiment 1 and will not be described again here.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hollow main drive for a shaft boring machine, characterized in that: It includes a central channel, a first sealed cavity and a plurality of second sealed cavities; The first sealed cavity comprises a sealed cavity enclosed by an outer shell (1), a large flange (2), a top cover (3) and a first sealing assembly (4); the outer shell (1) is sleeved on the outside of the large flange (2) and the large flange (2) is rotatably connected to the outer shell (1); the top cover (3) is connected to the outer shell (1) and the large flange (2); and the first sealing assembly (4) is respectively arranged between the top cover (3) and the large flange (2) and between the outer shell (1) and the large flange (2); The large flange (2) and the top cover (3) are hollow structures, and the hollow parts of the large flange (2) and the top cover (3) are coaxially arranged to form a central channel; The second sealed cavity is arranged in the first sealed cavity and is used for discharging mud to the ground.

2. A hollow main drive for a shaft boring machine according to claim 1, characterized in that: A slewing mechanism (5) is arranged in the first sealed cavity, the slewing mechanism (5) comprising a slewing bearing (5.1) and a drive unit (5.2), the large flange (2) is connected to the outer shell (1) via the slewing bearing (5.1), and the drive unit (5.2) is used to drive the large flange (2) to rotate.

3. A hollow main drive for a shaft boring machine according to claim 1, characterized in that: The second sealing cavity comprises a sealing cavity enclosed by a sealing ring (6), a second sealing component (7) and a large flange (2); the sealing ring (6) is arranged between the outer shell (1) and the large flange (2); and the second sealing component (7) is arranged between the sealing ring (6) and the large flange (2).

4. A hollow main drive for a shaft boring machine according to claim 3, characterized in that: The sealing ring (6) comprises a sealing ring body (6.1) and a recessed portion (6.2) arranged on the sealing ring body (6.1); the recessed portion (6.2) cooperates with the outer shell (1) and the second sealing component (7) to form a second sealing cavity.

5. The hollow main drive for a shaft boring machine according to claim 3, characterized in that: The sealing ring (6) is provided with a fixed mud pipe (8), and the fixed mud pipe (8) is communicated with the second sealing cavity.

6. A shaft boring machine, characterized in that: It comprises at least one excavation device, a slag discharge mechanism and a hollow main drive as described in any one of claims 1 to 5, wherein the hollow main drive is connected to a main engine support arm (9), the main engine support arm (9) is supported on the side wall of the shaft, the excavation device is connected to a large flange (2), and the slag discharge mechanism enters the bottom of the shaft through a central channel to clean the rock slag.

7. A shaft boring machine according to claim 6, characterized in that: The excavation device comprises a milling barrel excavation arm (10), on which a mud pump (11) and a movable mud pipe (12) are arranged, wherein one end of the movable mud pipe (12) is connected to the mud pump (11), and the other end is communicated with the second sealing chamber.

8. A shaft boring machine according to claim 6, characterized in that: The excavation device comprises a bucket-type excavation arm (13).

9. A shaft boring machine according to any one of claims 6 to 8, characterized in that: It also includes a drag chain mechanism (14), one end of which is connected to the large flange (2) and the other end of which is connected to the main machine support arm (9).

10. A shaft boring machine according to claim 9, characterized in that: The drag chain mechanism (14) comprises a drag chain (14.1), a drag chain outer bracket (14.2) and a drag chain inner bracket (14.3); the drag chain outer bracket (14.2) is connected to a main engine support arm (9); the drag chain inner bracket (14.3) is connected to a large flange (2); one end of the drag chain (14.1) is connected to the drag chain inner bracket (14.3) and the other end is connected to the drag chain outer bracket (14.2); a mud pipe installed inside the drag chain (14.1) is connected to a movable mud pipe (12) and a fixed mud pipe (8).

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