Rectangular vertical shaft heading machine and vertical shaft heading system

Abstract

The utility model relates to the technical field of shield equipment, and provides a rectangular vertical shaft heading machine and a vertical shaft heading system, and the vertical shaft heading machine comprises an excavation platform which is movably arranged in a vertical shaft along the excavation direction of the vertical shaft; the at least one excavation arm is rotatably connected to the excavation platform, the excavation arm is provided with an upper excavation arm and a lower excavation arm which are rotatably connected, the upper excavation arm is connected with the excavation platform, and the tail end of the lower excavation arm is connected with a cutter head; the first driving unit is connected between the excavation platform and the upper excavation arm so as to drive the excavation arm to swing in the first direction; the second driving unit is connected between the upper excavation arm and the lower excavation arm so as to drive the lower excavation arm to swing in the second direction; a certain included angle is formed between a first swing shaft, swinging in the first direction, of the excavation arm and a second swing shaft, swinging in the second direction, of the lower excavation arm. The vertical shaft heading machine can solve the problem that an existing vertical shaft heading machine cannot be well suitable for rectangular vertical shaft excavation of a water-rich rock stratum.

Description

Technical Field

[0001] The utility model relates to the technical field of shield equipment, in particular to a rectangular shaft boring machine and a shaft boring system capable of excavating a rectangular cross-section. Background Art

[0002] The existing vertical shaft construction mainly includes the drilling and blasting method, the drilling method and the caisson method, as follows:

[0003] Drilling and blasting method: The main construction equipment of this method is umbrella drill / small excavator, rock grab, etc. Excavation is carried out by drilling and blasting, and slag is discharged by rock grab and bucket. It is mainly used in strata with little water or after geological treatment.

[0004] Drilling method: The main construction equipment of this method includes drilling rigs, gantry cranes, etc. The drill bit is driven by the drill rod, and slag is discharged through gas lift reverse circulation. It is mainly used in water-rich and soft formations.

[0005] Caisson method: The main construction equipment of this method are excavators, mud pumps, grabs, etc. It is a method of manual excavation and follow-up sinking of the wellbore. It is mainly used for shallow vertical shafts in municipal soft soil strata.

[0006] In the fields of anti-sliding piles, underground garages, and other underground spaces, rectangular shafts have higher space utilization than circular shafts, and the bending section coefficient of rectangular sections of the same area is larger than that of circular sections. Rectangular shafts have a wider range of applications than circular shafts; however, existing circular shaft excavation equipment is not suitable for the excavation of rectangular sections.

[0007] At present, the complete set of tunnel boring machines matching the above three construction methods have been well applied in some specific strata. However, for the excavation of rectangular sections and hard rock strata, there are still several problems. The reasons are as follows:

[0008] 1. For large-diameter shaft construction, based on the design concept of full-section tunnel boring machine, the cutterhead and main drive have a large deadweight, which puts a greater test on the supporting derrick and lifting equipment. It is suitable for long-distance drainable mine shaft construction, but not suitable for short, flat and fast projects and construction in water-rich strata.

[0009] 2. Excavation with a milling head is generally suitable for soft soil and soft rock areas. For hard rock geology such as granite, the pick teeth are severely worn and the advance speed cannot meet normal excavation needs.

[0010] 3. The rotary drive is used to drive the horizontal cutter disc to make a rotary motion. It is suitable for circular cross-section excavation, but cannot adapt to rectangular cross-section excavation. In addition, the swing of the horizontal cutter disc makes the rock breaking trajectory of the roller cutter complex and changeable, and the force condition of the roller cutter is poor, which is easy to be damaged.

[0011] Therefore, for the excavation of rectangular shafts in water-rich rock formations, it is urgent to design a shaft boring machine with a simple structure, small footprint and wide geological adaptability. Utility Model Content

[0012] The utility model aims to provide a rectangular shaft boring machine and a shaft boring system, so as to solve the problem that the existing shaft boring machine cannot be well applied to the excavation of rectangular shafts in water-rich rock formations.

[0013] The above technical objectives of the utility model are mainly achieved through the following technical means:

[0014] On the one hand, the utility model provides a rectangular shaft boring machine, which comprises:

[0015] An excavation platform is movably arranged in the shaft along the excavation direction of the shaft;

[0016] At least one excavation arm rotatably connected to the excavation platform, the excavation arm having an upper excavation arm and a lower excavation arm rotatably connected, the upper excavation arm being connected to the excavation platform, and a cutterhead being connected to a distal end of the lower excavation arm;

[0017] a first driving unit connected between the excavation platform and the upper excavation arm to drive the excavation arm to swing along a first direction;

[0018] a second driving unit connected between the upper excavation arm and the lower excavation arm to drive the lower excavation arm to swing along a second direction;

[0019] Wherein, a first swing axis for the excavating arm to swing along the first direction and a second swing axis for the lower excavating arm to swing along the second direction are arranged at a certain angle.

[0020] The rectangular shaft boring machine described in the utility model can greatly simplify the structural complexity of the boring machine. Compared with the full-section circular cutter head, the large central rotary drive is omitted, and the excavation of a large cross-section with a small cutter head is achieved through a two-stage swing method, which reduces the manufacturing difficulty and manufacturing cost. There is no need for personnel to go down the shaft during the construction process, the equipment is easy to maintain, and the construction safety is high.

[0021] The rectangular shaft boring machine described in the utility model adopts a double-swinging wheel cutter disc for excavation, thereby realizing the contour excavation of the rectangular cross-section shaft. There is no need to set a rotation center on the excavation arm. The entire rectangular excavation surface can be covered only by swinging (rotating) the excavation arm in two directions. The utility model is suitable for the excavation of rectangular cross-section shafts in the fields of underground parking lots, shield working shafts, underground continuous walls, large pile foundations, etc.

[0022] In a preferred embodiment of the present invention, the first swing axis of the excavating arm swinging along the first direction is perpendicular to the second swing axis of the lower excavating arm swinging along the second direction.

[0023] In this embodiment, the swing axes of the two swing directions of the excavation arm are perpendicular to each other, which can maximize the use of the swing range of the excavation arm in two directions. On the basis of covering the entire rectangular excavation surface, the swing range of the excavation arm (upper excavation arm and / or lower excavation arm) is reduced.

[0024] In a preferred embodiment of the present invention, the lower excavation arm has a cutter disc arm that can be extended or retracted along its length direction, and the cutter disc is connected to the cutter disc arm.

[0025] In this embodiment, the cutter disc can be extended and retracted within a certain range. It can be appropriately extended when the excavation arm swings to the positions of the two ends, and can be appropriately shortened when the excavation arm swings to the middle position, ensuring that the excavation arm excavates the same depth downward within the entire rectangular excavation surface when excavating at the same depth position.

[0026] In a preferred embodiment of the present utility model, a propulsion cylinder capable of driving the cutter disc arm to extend and retract is connected between the lower excavation arm and the cutter disc arm.

[0027] In this embodiment, a sliding sleeve structure is formed between the lower excavation arm and the cutter disc arm, and the extension and retraction of the cutter disc arm is driven by a thrust cylinder arranged in the lower excavation arm. The structure is relatively simple, and hydraulic drive is a commonly used driving method in tunnel boring machines, so there is no need to separately set up other types of driving methods.

[0028] In a preferred embodiment of the present invention, the first driving unit is a first swing arm cylinder; and / or the second driving unit is a second swing arm cylinder.

[0029] In this embodiment, the swinging of the excavation arm in the first direction and the second direction are driven by the swing arm cylinder. The structure is relatively simple, and hydraulic drive is a commonly used driving method in the tunnel boring machine, so there is no need to set up other types of driving methods separately.

[0030] In a preferred embodiment of the present invention, the excavation platform has a shoe mechanism that can abut against the side wall of the shaft to fix the rectangular shaft boring machine.

[0031] In this embodiment, the gripper mechanism can fix the position of the rectangular shaft boring machine in the shaft, thereby ensuring the stability of the boring machine during excavation at a certain depth.

[0032] In a preferred embodiment of the present invention, a plurality of the shoe mechanisms are spaced apart on the excavation platform along the circumferential direction of the shaft; and / or a plurality of the shoe mechanisms are spaced apart on the excavation platform along the extending direction of the shaft.

[0033] In this embodiment, the multiple support shoe mechanisms provided can improve the support stability of the excavation platform.

[0034] On the other hand, the utility model also provides a shaft excavation system, which includes:

[0035] At least one boring machine, wherein the boring machine is a rectangular shaft boring machine as described above;

[0036] An equipment recovery unit is arranged at the wellhead of the shaft and is connected to the main boring machine;

[0037] A shaft, arranged in contact with the side wall of the shaft and used to reinforce the shaft;

[0038] A shaft lifting and lowering unit is arranged at the wellhead of the vertical shaft and is connected to the shaft.

[0039] The shaft boring system described in the utility model adopts the rectangular shaft boring machine as described above as the boring main machine during the excavation process, that is, the boring main machine adopts a double-swinging wheel cutter disc for excavation, and there is no need to set a rotation center on the excavation arm. The entire rectangular excavation surface can be covered only by swinging (rotating) the excavation arm in two directions. The utility model is suitable for excavation operations of rectangular cross-section shafts in the fields of underground parking lots, shield working shafts, underground continuous walls, large pile foundations, etc.

[0040] The vertical shaft excavation system of the utility model is provided with an equipment recovery unit used in conjunction with the excavation main machine for recovering the excavation main machine; the shaft and the shaft lifting unit can fix the side wall of the excavated shaft to prevent it from collapsing.

[0041] In a preferred embodiment of the utility model, the lower end of the shaft is connected with a guard wall, the guard wall is located on the circumferential outer side of the excavation platform and is attached to the side wall of the shaft, and the guard wall is provided with an opening for the support shoe mechanism on the excavation platform to pass through.

[0042] In this embodiment, the retaining wall is used as a temporary support during the excavation process, and the openings provided thereon facilitate the support shoe mechanism to extend and tighten on the side wall of the shaft.

[0043] In a preferred embodiment of the present invention, the shaft excavation system further comprises:

[0044] The slag discharge unit includes a connected mud pump and a mud pipeline. The mud pump is arranged on the excavation arm of the tunneling main machine, and the other end of the mud pipeline extends to the outside of the shaft.

[0045] In this embodiment, the slag discharge unit can realize the upward transportation of the mud-water mixture at the cutter head position, and cooperate with the main boring machine to complete the excavation operation of the entire shaft.

[0046] In a preferred embodiment of the present invention, the shaft excavation system comprises a plurality of the excavation main machines, which are arranged in a matrix to form a rectangular excavation surface, and support plates are provided between two adjacent excavation main machines.

[0047] In this embodiment, a plurality of tunneling main machines can be arranged according to actual needs, thereby realizing the excavation of a shaft with a larger cross-section and improving the application scope of the shaft tunneling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0049] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0050] Figure 1 This is a schematic diagram of the structure of the rectangular shaft boring machine of the utility model;

[0051] Figure 2 Another structural schematic diagram of the rectangular shaft excavation described in the utility model;

[0052] Figure 3 It is a structural schematic diagram of the excavation arm of the utility model;

[0053] Figure 4 It is a structural schematic diagram of the vertical shaft excavation system of the utility model;

[0054] Figure 5 Another structural schematic diagram of the vertical shaft excavation system of the utility model;

[0055] Figure 6 It is a schematic diagram of the top view of the structure of the vertical shaft excavation system of the utility model;

[0056] Figure 7 It is a structural schematic diagram of another embodiment of the vertical shaft excavation system of the utility model;

[0057] Figure 8 It is a schematic diagram of the top structure of another embodiment of the vertical shaft excavation system of the utility model.

[0058] Description of reference numerals:

[0059] 10. Excavation platform; 11. Shoe support mechanism;

[0060] 20. Excavation arm; 21. Upper excavation arm; 22. Lower excavation arm; 23. Cutter arm; 24. Cutter; 25. Propulsion cylinder; 26. First pin shaft; 27. Second pin shaft;

[0061] 30. First swing arm oil cylinder; 31. Second swing arm oil cylinder;

[0062] 40. Excavation host; 41. Equipment recovery unit; 42. Shaft; 43. Shaft lifting and lowering unit; 44. Wall protection;

[0063] 50. Mud pump; 51. Mud pipeline;

[0064] 60. Support plate;

[0065] 70. Vertical shaft. DETAILED DESCRIPTION

[0066] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0067] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0069] Implementation method 1:

[0070] like Figures 1 to 3 As shown, the utility model provides a rectangular shaft boring machine, which includes: an excavation platform 10, which is movably arranged in the shaft 70 along the excavation direction of the shaft 70; at least one excavation arm 20 rotatably connected to the excavation platform 10, the excavation arm 20 has an upper excavation arm 21 and a lower excavation arm 22 that are rotatably connected, the upper excavation arm 21 is connected to the excavation platform 10, and the end of the lower excavation arm 22 is connected to a cutter head 24; a first driving unit, connected between the excavation platform 10 and the upper excavation arm 21, to drive the excavation arm 20 to swing along a first direction; a second driving unit, connected between the upper excavation arm 21 and the lower excavation arm 22, to drive the lower excavation arm 22 to swing along a second direction; wherein, a first swing axis for the upper excavation arm 21 to swing along the first direction and a second swing axis for the lower excavation arm 22 to swing along the second direction have a certain angle between them.

[0071] The rectangular shaft boring machine described in the utility model can greatly simplify the structural complexity of the boring machine. Compared with the full-section circular cutter head, the large central rotary drive is omitted, and the excavation of a large cross-section with a small cutter head is achieved through a two-stage swing method, which reduces the manufacturing difficulty and manufacturing cost. There is no need for personnel to go down the shaft during the construction process, the equipment is easy to maintain, and the construction safety is high.

[0072] The rectangular shaft boring machine described in the utility model adopts a double-swinging wheel cutter disc for excavation, thereby realizing the contour excavation of the rectangular cross-section shaft 70. There is no need to set a rotation center on the excavation arm 20. The entire rectangular excavation surface can be covered only by swinging (rotating) the excavation arm 20 in two directions. The utility model is suitable for excavation operations of rectangular cross-section shafts 70 in underground parking lots, shield working shafts, underground continuous walls, large pile foundations and other fields.

[0073] The specific structure of each part of the rectangular shaft boring machine of the utility model, as well as the position and connection relationship between the parts will be described in detail below.

[0074] like Figure 1 and Figure 2As shown, the rectangular shaft boring machine of the utility model has an excavation platform 10, which is the main supporting structure of the boring machine and can move downward along with the downward excavation of the shaft 70. Since the rectangular shaft boring machine of the utility model is used for the excavation of rectangular excavation surfaces, the excavation platform 10 is a cubic structure as a whole, which is mainly formed by welding or bolting steel components. The excavation platform 10 has a corresponding structure that can fix its position, and is also connected to a device that can pull itself out of the shaft 70. The above-mentioned supporting device will be described in detail below.

[0075] like Figures 1 to 3 As shown, the rectangular shaft boring machine of the utility model further comprises an excavation arm 20 swingably arranged on the excavation platform 10. The excavation arm 20 serves as an excavation mechanism of the boring machine, and can perform excavation operations on the surface to be excavated in the shaft 70. In order to enable the excavation range of the excavation arm 20 to cover the entire rectangular excavation surface in the shaft, the excavation arm 20 can swing in two different directions.

[0076] First, if Figure 1 and Figure 3 As shown, the excavation arm 20 is integrally connected to the excavation platform 10 for rotation via the first pin 26. The first driving unit is connected between the excavation arm 20 and the excavation platform 10, and is used to drive the excavation arm 20 to swing relative to the excavation platform 10 in a first direction. In this embodiment, the first driving unit is a first swing arm oil cylinder 30. One end of the excavation arm 20 and the excavation platform 10 are both provided with oil cylinder ears. Both ends of the first swing arm oil cylinder 30 are respectively hinged to the above two oil cylinder ears, thereby driving the excavation arm 20 to move in the left and right directions (with the first drive unit 20 being connected to the first drive unit 20). Figure 1 The swing of the excavation arm 20 in the first direction is driven by the first swing arm cylinder 30, the structure is relatively simple, and hydraulic drive is a commonly used drive mode in the tunnel boring machine, and there is no need to set up other types of drive modes separately.

[0077] Secondly, if Figures 1 to 3 As shown, the excavation arm 20 includes an upper excavation arm 21 and a lower excavation arm 22 which are rotatably connected via a second pin shaft 27, and the upper excavation arm 21 is connected to the excavation platform 10 and the first swing arm cylinder 30. The second driving unit is connected between the upper excavation arm 21 and the lower excavation arm 22, and is used to drive the lower excavation arm 22 to swing relative to the upper excavation arm 21 along a second direction, wherein the first direction and the second direction are set at a certain angle, that is, the first direction and the second direction do not overlap. In this embodiment, the second driving unit is a second swing arm cylinder 31, and cylinder ears are provided on the upper excavation arm 21 and the lower excavation arm 22, and the two ends of the second swing arm cylinder 31 are respectively hinged to the above-mentioned two cylinder ears, thereby driving the lower excavation arm 22 to move in the left and right directions (with a first direction of 1 / 2 and a second direction of 2 / 3). Figure 2 The direction shown is the same as that shown in the figure, where Figure 1The viewing direction and Figure 2 The swing of the excavation arm 20 in the second direction is driven by the second swing arm cylinder 31, which has a relatively simple structure, and hydraulic drive is a commonly used drive mode in the tunnel boring machine, and there is no need to set up other types of drive modes separately.

[0078] Further, such as Figure 2 and Figure 3 As shown, a cutter disc 24 is connected to the end of the lower excavation arm 22; in the present embodiment, the cutter disc 24 is a wheel cutter disc, which is driven by a motor to drive a roller cutter arranged on the circumference of the cutter disc 24 to rotate, thereby cutting the bedrock through the rotational motion to realize the excavation function.

[0079] Better, such as Figure 2 As shown, a plurality of parallel excavation arms 20 can be arranged on the excavation platform 10, thereby expanding the excavation range of the rectangular shaft boring machine and improving the excavation efficiency of the boring machine to a certain extent. In this embodiment, two adjacent and side-by-side excavation arms 20 are arranged, and the two first pins 26 rotatably connected to the two excavation arms 20 and the excavation platform 10 are located on the same axis.

[0080] The structure and technical effects of a preferred embodiment of the rectangular shaft boring machine of the utility model will be further described in detail below.

[0081] According to one embodiment of the present utility model, Figure 2 and Figure 3 As shown, the first swing axis of the upper excavation arm 21 swinging in the first direction is perpendicular to the second swing axis of the lower excavation arm 22 swinging in the second direction; the swing axes of the excavation arm 20 in two swinging directions are perpendicular to each other, which can maximize the use of the swing range of the excavation arm 20 in two directions, and reduce the swing range of the excavation arm 20 (upper excavation arm 21 and / or lower excavation arm 22) on the basis of covering the entire rectangular excavation surface.

[0082] According to one embodiment of the present utility model, Figure 3 As shown, the lower excavation arm 22 has a cutterhead arm 23 that can be extended or retracted along its length direction, and a cutterhead 24 is connected to the cutterhead arm 23. The cutterhead 24 can be extended and retracted within a certain range, and can be appropriately extended when the excavation arm 20 swings to the positions of both ends, and can be appropriately shortened when the excavation arm 20 swings to the middle position, ensuring that when the excavation arm 20 is excavating at the same depth position, it can excavate the same depth downward in the entire rectangular excavation surface.

[0083] Specifically, Figure 3As shown, a sliding sleeve structure is formed between the lower excavation arm 22 and the cutterhead arm 23, and a propulsion cylinder 25 capable of driving the cutterhead arm 23 to extend and retract is connected between the lower excavation arm 22 and the cutterhead arm 23; the propulsion cylinder 25 can drive the cutterhead arm 23 to extend or retract relative to the lower excavation arm 22, thereby changing the length of the entire excavation arm 20. In this embodiment, the extension and retraction of the cutterhead arm 23 is driven by the propulsion cylinder 25 disposed in the lower excavation arm 22, and the structure is relatively simple, and hydraulic drive is a commonly used drive mode in a roadheader, and there is no need to separately set other types of drive modes.

[0084] According to one embodiment of the present utility model, Figure 1 and Figure 2 As shown, the excavation platform 10 has a shoe support mechanism 11 that can be abutted against the side wall of the shaft 70 to fix the rectangular shaft boring machine. The shoe support mechanism 11 can fix the position of the rectangular shaft boring machine in the shaft 70 to ensure the stability of the boring machine during excavation at a certain depth. The shoe support mechanism 11 includes a shoe support cylinder, a shoe plate, a slide box and other components; the shoe support cylinder drives the shoe plate to move horizontally in the slide box to achieve the tightening or retracting function; the shoe support mechanism 11 is a conventional setting in the prior art and will not be further described here.

[0085] Better, such as Figure 2 and Figure 6 As shown, a plurality of support shoe mechanisms 11 are provided at intervals on the excavation platform 10 along the circumferential direction of the shaft 70 ; and / or, a plurality of support shoe mechanisms 11 are provided at intervals on the excavation platform 10 along the extension direction of the shaft 70 ; a plurality of support shoe mechanisms 11 can improve the support stability of the excavation platform 10 .

[0086] Implementation method 2:

[0087] like Figures 4 to 8 As shown, the utility model also provides a shaft boring system, which includes: at least one boring main machine 40, the boring main machine 40 is a rectangular shaft boring machine as described in the first embodiment; an equipment recovery unit 41, which is arranged at the wellhead of the shaft 70 and is connected to the boring main machine 40; a shaft 42, which is attached to the side wall of the shaft 70 and is used to reinforce the shaft 70; and a shaft lifting unit 43, which is arranged at the wellhead of the shaft 70 and is connected to the shaft 42.

[0088] The shaft boring system described in the utility model adopts the rectangular shaft boring machine as described above as the boring machine during the excavation process, that is, the boring machine 40 adopts a double-swinging wheel cutter disc for excavation, and there is no need to set a rotation center on the excavation arm 20. The entire rectangular excavation surface can be covered only by swinging (rotating) the excavation arm 20 in two directions. It is suitable for excavation operations of rectangular cross-section shafts 70 in underground parking lots, shield working shafts, underground continuous walls, large pile foundations and other fields.

[0089] The shaft excavation system described in the utility model is provided with an equipment recovery unit 41 used in conjunction with the excavation main machine 40 for recovering the excavation main machine 40; the shaft 42 and the shaft lifting unit 43 can reinforce the side wall of the excavated shaft 70 to prevent it from collapsing.

[0090] The specific structure of each part of the shaft excavation system of the utility model, as well as the position and connection relationship between each part will be described below.

[0091] like Figures 4 to 6 As shown, the shaft boring system described in the utility model has a boring host 40, and the boring host 40 is the shaft boring machine described in the above embodiment one. The specific structure of the shaft boring machine (excavation host 40) has been described in detail in the embodiment one, and will not be repeated here.

[0092] like Figures 4 to 6 As shown, the shaft excavation system described in the utility model also has an equipment recovery unit 41 connected to the excavation main machine 40. The equipment recovery unit 41 is arranged at the wellhead of the shaft 70, and includes a plurality of winches evenly distributed at the wellhead. The plurality of winches are connected to the excavation platform 10 in the excavation main machine 40 through steel wire ropes, and are used to control the recovery and lowering of the excavation main machine 40.

[0093] like Figures 4 to 6 As shown, the vertical shaft excavation system described in the utility model also has a shaft 42 and a shaft lifting and lowering unit 43. The shaft lifting and lowering unit 43 is arranged at the wellhead, and includes a plurality of winches evenly distributed at the wellhead. The plurality of winches pull and lower the shaft 42 through steel strands to ensure the controlled sinking of the prefabricated shaft or the cast-in-place shaft.

[0094] The structure and technical effects of a preferred embodiment of the shaft excavation system of the utility model will be further described below.

[0095] According to one embodiment of the present utility model, Figure 5 As shown, the lower end of the shaft 42 is connected to a guard wall 44, which is located on the circumferential outer side of the excavation platform 10 and is attached to the side wall of the shaft 70. The guard wall 44 serves as a temporary support during the excavation process and is provided with openings to facilitate the support shoe mechanism 11 to extend through the openings and be tightened on the side wall of the shaft 70.

[0096] According to one embodiment of the present utility model, Figure 5As shown, the shaft excavation system further includes: a slag discharge unit, which includes a connected mud pump 50 and a mud pipe 51, wherein the mud pump 50 is arranged on the excavation arm 20 of the excavation main machine 40, and the other end of the mud pipe 51 extends to the outside of the shaft 70. The slag discharge unit can realize the upward transportation of the mud-water mixture at the position of the cutter head 24, and cooperate with the excavation main machine 40 to complete the excavation operation of the entire shaft 70.

[0097] According to one embodiment of the present utility model, Figure 7 and Figure 8 As shown, the shaft excavation system has a plurality of excavation machines 40 , which are arranged in a matrix to form a rectangular excavation surface, and support plates 60 are provided between two adjacent excavation machines 40 .

[0098] In the actual operation process, multiple excavation hosts 40 can be set as needed to achieve the excavation of a larger cross-section shaft 70 and improve the applicability of the shaft excavation system. Figure 7 As shown, two adjacent boring machines 40 are arranged side by side, and a supporting plate 60 is arranged between the adjacent support shoe mechanisms 11 of the two boring machines 40.

[0099] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A rectangular shaft boring machine, characterized in that: include: An excavation platform (10) is movably arranged in the vertical shaft (70) along the excavation direction of the vertical shaft (70); at least one excavation arm (20) rotatably connected to the excavation platform (10), the excavation arm (20) comprising an upper excavation arm (21) and a lower excavation arm (22) rotatably connected to each other, the upper excavation arm (21) being connected to the excavation platform (10), and a cutterhead (24) being connected to the end of the lower excavation arm (22); A first driving unit connected between the excavation platform (10) and the upper excavation arm (21) to drive the excavation arm (20) to swing along a first direction; A second driving unit connected between the upper excavation arm (21) and the lower excavation arm (22) to drive the lower excavation arm (22) to swing along a second direction; Wherein, a first swing axis for the excavating arm (20) to swing along a first direction and a second swing axis for the lower excavating arm (22) to swing along a second direction are arranged at a certain angle.

2. The rectangular shaft boring machine according to claim 1, characterized in that: A first swing axis for the excavating arm (20) to swing in a first direction is perpendicular to a second swing axis for the lower excavating arm (22) to swing in a second direction.

3. The rectangular shaft boring machine according to claim 1, characterized in that: The lower excavation arm (22) has a cutter head arm (23) which can be extended or retracted along its length direction, and the cutter head (24) is connected to the cutter head arm (23).

4. The rectangular shaft boring machine according to claim 3, characterized in that: A propulsion cylinder (25) capable of driving the cutter head arm (23) to extend and retract is connected between the lower excavation arm (22) and the cutter head arm (23).

5. The rectangular shaft boring machine according to claim 1, characterized in that: The first driving unit is a first swing arm oil cylinder (30); and / or the second driving unit is a second swing arm oil cylinder (31).

6. The rectangular shaft boring machine according to claim 1, characterized in that: The excavation platform (10) has a shoe mechanism (11) that can abut against the side wall of the shaft (70) to fix the rectangular shaft boring machine.

7. The rectangular shaft boring machine according to claim 6, characterized in that: Along the circumferential direction of the shaft (70), a plurality of the shoe support mechanisms (11) are arranged at intervals on the excavation platform (10); and / or, along the extension direction of the shaft (70), a plurality of the shoe support mechanisms (11) are arranged at intervals on the excavation platform (10).

8. A shaft excavation system, characterized in that: include: At least one boring machine (40), wherein the boring machine (40) is a rectangular shaft boring machine as claimed in any one of claims 1 to 7; An equipment recovery unit (41) is arranged at the wellhead of the vertical shaft (70) and is connected to the main boring machine (40); A shaft (42) is disposed adjacent to a side wall of the vertical shaft (70); A shaft lifting and lowering unit (43) is arranged at the wellhead of the vertical shaft (70) and is connected to the shaft (42).

9. The shaft excavation system according to claim 8, characterized in that: Also includes: A slag discharge unit, the slag discharge unit comprising a connected mud pump (50) and a mud pipeline (51), the mud pump (50) being arranged on an excavation arm (20) of the excavation main machine (40), and the other end of the mud pipeline (51) extending to the outside of the vertical shaft (70).

10. The shaft excavation system according to claim 8, characterized in that: The lower end of the shaft (42) is connected to a protective wall (44), which is located on the circumferential outer side of the excavation platform (10) and is attached to the side wall of the shaft (70). The protective wall (44) is provided with an opening for the support shoe mechanism (11) on the excavation platform (10) to pass through.

11. The shaft excavation system according to claim 8, characterized in that: The vertical shaft (70) excavation system comprises a plurality of excavation main machines (40), wherein the plurality of excavation main machines (40) are arranged in a matrix to form a rectangular excavation surface, and support plates (60) are provided between two adjacent excavation main machines (40).

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