A small-diameter rectangular-section vertical shaft excavation device suitable for hard rock

Abstract

The present invention relates to the technical field of municipal engineering shaft construction, and specifically to a small-diameter rectangular-section shaft excavation device suitable for hard rock, comprising a crawler main machine, the crawler main machine is connected to a rigid frame through a twisted rope and a suspension system, a motor is arranged inside the rigid frame, a main shaft is fixedly connected to the output shaft of the motor, and a three-cone drill bit is connected to the lower end of the main shaft. The beneficial effect of the present invention is that the crawler main machine drives the rigid frame to move to the desired position, and the lifting of the rigid frame is realized through the twisted rope and the suspension system. When excavating, the rigid frame as a whole moves slowly downward, and the motor drives the three-cone drill bit to rotate through the main shaft. The three-cone drill bit first excavates a cylindrical surface for the rock body to be excavated; then the high-pressure air pump works to make the edge crushing device work to crush and excavate around the cylindrical surface, so that a rectangular surface can be formed, which solves the problem of small-diameter rectangular-section shaft construction in existing square pile construction.

Description

Technical Field

[0001] The invention relates to the technical field of municipal engineering shaft construction, and in particular to a small-diameter rectangular-section shaft excavation device suitable for hard rock. Background Art

[0002] Square piles are a kind of foundation structure generally used in building construction, mainly prefabricated piles. In recent years, square piles have also been widely used in bridge construction. Square piles are increasingly used in large-scale building structures due to their advantages such as high rigidity, high bearing capacity and low construction difficulty. The construction process of square piles is similar to that of underground continuous walls. First, the guide wall is constructed, and the rock and soil are taken out using construction equipment according to the thickness of the square piles. Then, a steel cage is placed and then the piles are formed by pouring underwater concrete.

[0003] At present, square pile construction mainly uses mechanical equipment for underground continuous wall construction, mainly hydraulic grabs and double-wheel milling machines. These two types of equipment are expensive to purchase and large in size. Under complex terrain conditions, it is difficult to transport the equipment to the site in time. Hydraulic grabs are suitable for relatively soft rocks and soil layers, and it is more difficult to construct rocks with higher strength; the cross-sectional shape of the double-wheel milling machine is a flat rectangle, and it needs to be milled multiple times for square pile construction, which is inefficient; in addition, the current construction slot width of the double-wheel milling machine and hydraulic grab is mostly around 3m, while the cross-sectional slot width required by the current square pile project is mostly around 1.5m, which is difficult to match.

[0004] Therefore, it is necessary to propose a shaft excavation equipment suitable for small-diameter square pile construction to solve the current problems. Summary of the invention

[0005] In response to the problem, the present invention provides a small-diameter rectangular cross-section vertical shaft excavation equipment suitable for hard rock, including a crawler main unit, which is connected to a rigid frame through a twisted rope and a suspension system, a motor is arranged inside the rigid frame, a main shaft is fixedly connected to the output shaft of the motor, a three-cone drill bit is connected to the lower end of the main shaft, an edge crushing device is arranged around the three-cone drill bit, a high-pressure air pump is arranged inside the rigid frame, and the high-pressure air pump is connected to the edge crushing device through a gas pipeline.

[0006] As a further technical solution of the present invention, the three-cone drill bit includes a mounting main board connected to the main shaft, and three vertically arranged mounting brackets are arranged on the mounting main board. The mounting brackets are all rotatably connected to the drill bit, and a number of crushing teeth are evenly arranged on the drill bit.

[0007] As a further technical solution of the present invention, the edge crushing device includes a row of teeth crushing assembly, a single pick crushing assembly and a block crushing assembly, the row of teeth crushing assembly includes a plurality of first pneumatic devices connected to the rigid frame, the bottom end of the first pneumatic device is connected to a first tool holder, a row of first picks are installed on the four sides of the first tool holder, and the first picks are arranged in a rectangular shape on the first tool holder.

[0008] As a further technical solution of the present invention, the block crushing assembly includes a plurality of second pneumatic devices connected to the rigid frame, the bottom end of the second pneumatic device is connected to a second tool holder, a second pick is installed on the second tool holder, and the second pick is arranged in a block shape on the second tool holder.

[0009] As a further technical solution of the present invention, the single-cutting tooth crushing assembly includes a plurality of third pneumatic devices connected to the rigid frame, and a total of four third pneumatic devices are provided, which are respectively arranged at the four corners of the rigid frame. The bottom end of the third pneumatic device is connected to a third tool holder, and a single third cutting tooth is fixedly connected to the third tool holder.

[0010] As a further technical solution of the present invention, the front end of the three-cone drill bit exceeds the front end of the third pick, and the front end of the third pick exceeds the front ends of the second pick and the first pick.

[0011] As a further technical solution of the present invention, the first pneumatic device / the second pneumatic device / the third pneumatic device includes an outer shell, a cavity is opened inside the outer shell, a slider is arranged in the cavity, a connecting rod is arranged on the slider, one end of the connecting rod extends downward to the outside of the cavity, the connecting rod is connected to the first bracket / the second bracket / the third bracket, and also includes a first gas branch pipe and a second gas branch pipe, the first gas branch pipe and the second gas branch pipe are both connected to the gas pipeline, and the first gas branch pipe is connected to the interior of the cavity above the slider, the second gas branch pipe is connected to the interior of the cavity below the slider, and the first gas branch pipe and the second gas branch pipe are both provided with solenoid valves.

[0012] As a further technical solution of the present invention, a transition sleeve portion is arranged at the lower part of the outer shell, a connecting rod is arranged through the transition sleeve portion, and a diameter of the connecting rod is equal to an inner diameter of the transition sleeve portion.

[0013] As a further technical solution of the present invention, a plurality of slurry suction holes are evenly arranged on the lower side of the rigid frame, and the slurry suction holes are connected to the slurry suction pump arranged in the rigid frame through a slurry suction pipe.

[0014] As a further technical solution of the present invention, a plurality of deviation-correcting structures are installed on the rigid frame, an electrical control system box is also arranged in the rigid frame, and the electrical control system box is electrically connected to the deviation-correcting structures.

[0015] The present invention has the following beneficial effects:

[0016] 1. The crawler mainframe drives the rigid frame to move to the required position, and the rigid frame is lifted and lowered through the twisted rope and suspension system. When excavating, the rigid frame moves downward slowly as a whole, and the motor is started. The motor drives the three-cone drill bit to rotate through the main shaft. The three-cone drill bit first excavates a cylindrical surface for the rock mass to be excavated; then the high-pressure air pump works to make the edge crushing device work to crush and excavate around the cylindrical surface, so as to form a rectangular surface, which solves the problem of small-diameter rectangular section shaft construction in the existing square pile construction. It is convenient and fast to move and use, with high construction efficiency, and has certain promotion and application value;

[0017] 2. When the motor drives the three-cone drill bit to rotate, the drill bit on the three-cone drill bit will rotate continuously. When breaking the rock, the three-cone drill bit will have impact, shearing and compression damage. Therefore, the drill bit can crush the surrounding rocks, forming a cylindrical surface of the rock mass, and perform preliminary crushing on the rock mass, so as to facilitate subsequent crushing again;

[0018] 3. The rock mass around the three-cone drill bit is crushed by arranging a single-cutting tooth crushing assembly, a row-tooth crushing assembly and a block crushing assembly, so that a rectangular cross section can be quickly obtained. The cross-section grooves formed in the end are small in size, meeting the existing excavation construction requirements;

[0019] 4. A high-pressure air pump is used to act on the first pneumatic device / the second pneumatic device / the third pneumatic device to drive the first pick / the second pick / the third pick to crush the rock mass behind the circular section. Due to the free surface created by the three-cone drill bit and the third pick, the peak force of the remaining rock mass is significantly reduced, so that a rectangular section can be formed quickly and conveniently. Compared with the existing technology, the formation of the rectangular section is faster and more reliable, and multiple milling processes are not required. It has a wide range of promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the excavation equipment of the present invention;

[0023] Figure 3 For the present invention Figure 2 A front view of

[0024] Figure 4 It is a structural schematic diagram of a three-cone drill bit of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the drill bit of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the tooth-row crushing assembly of the present invention;

[0027] Figure 7 It is a structural schematic diagram of a single pick crushing assembly of the present invention;

[0028] Figure 8 For the present invention Figure 3 Bottom view of

[0029] Fig. 9 It is a schematic diagram of the structure of the first pneumatic device, the second pneumatic device and the third pneumatic device of the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the rock mass before excavation of the present invention;

[0031] Fig.11 It is a schematic diagram of the structure of the rock mass when the single pick crushing assembly of the present invention is excavating;

[0032] Fig.12 It is a schematic diagram of the structure of the rock mass after excavation is completed in the present invention.

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] 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 are within the scope of protection of the present invention.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] Combination Figure 1 , Figure 2 and Figure 3 In an embodiment of the present invention, a small-diameter rectangular cross-section vertical shaft excavation equipment suitable for hard rock includes a crawler main machine 9, which is connected to a rigid frame 1 through a twisted rope 8 and a suspension system 7, a motor 4 is arranged inside the rigid frame 1, a main shaft 15 is fixedly connected to the output shaft of the motor 4, a three-cone drill bit 3 is connected to the lower end of the main shaft 15, an edge crushing device 2 is arranged around the three-cone drill bit 3, a high-pressure air pump 5 is arranged inside the rigid frame 1, and the high-pressure air pump 5 is connected to the edge crushing device 2 through a gas pipeline 12.

[0038] In one embodiment of the present invention, the crawler mainframe 9 drives the rigid frame 1 to move to the desired position, and the rigid frame 1 is lifted and lowered by the rope 8 and the suspension system 7. When excavating, the rigid frame 1 moves slowly downward as a whole, and the motor 4 is started. The motor 4 drives the three-cone drill bit 3 to rotate through the main shaft 15. The three-cone drill bit 3 first excavates a cylindrical surface for the rock to be excavated; then the high-pressure air pump 5 works to make the edge crushing device 2 work to crush and excavate the area around the cylindrical surface, thereby forming a rectangular surface, which solves the problem of small-diameter rectangular section shaft construction in the existing square pile construction. It is convenient and fast to move and use, with high construction efficiency, and has a certain value of promotion and application.

[0039] See also Figure 3 , Figure 4 and Figure 5 The three-cone drill bit 3 includes a mounting main board 31 connected to the main shaft 15, and three vertically arranged mounting brackets 32 are arranged on the mounting main board 31. The mounting brackets 32 are rotatably connected to the drill bit 33, and a plurality of crushing teeth 34 are evenly arranged on the drill bit 33.

[0040] When the motor 4 drives the three-cone drill bit 3 to rotate, the drill bit 33 on the three-cone drill bit 3 will continuously rotate. When breaking rocks, the three-cone drill bit 3 will experience impact, shearing, and compression damage. Therefore, the drill bit 33 can crush the surrounding rocks to form a cylindrical surface of the rock mass, and perform preliminary crushing on the rock mass to facilitate subsequent crushing again.

[0041] The drill bit 33 is convex, and a plurality of circles of crushing teeth 34 are arranged on the surface of the drill bit 33. The overall structural shape of the drill bit 33 is similar to the structural shape of a "dumpling". Such a structural arrangement can better highlight the crushing teeth 34 arranged thereon, so that the crushing teeth 34 can have better contact with the rock mass, so as to facilitate efficient crushing of the rock mass and improve the excavation efficiency.

[0042] The axis of the drill bit 33 is tilted, and the three drill bits 33 are all facing the middle. The axes of the three drill bits 33 intersect at one point. The crushing teeth 34 are in the shape of a triangular prism. In this embodiment, the three drill bits 33 are all tilted and have a certain tilt angle with each other, which has a better crushing effect on the rock mass.

[0043] See also Figure 2 and Figure 8 The edge crushing device 2 includes a row tooth crushing assembly, a single cutter tooth crushing assembly and a block crushing assembly.

[0044] In one embodiment of the present invention, the edge crushing device is used to crush the places that the three-cone drill bit 3 cannot reach, wherein the single-tooth crushing components are distributed around the rigid frame 1, and are used to crush the four corners of the rectangular section that need to be formed; the row of teeth crushing components are used to crush the rock around the three-cone drill bit 3, and the block crushing components are used to crush the areas that the first two crushing components cannot reach.

[0045] In this embodiment, the rock mass around the three-tooth drill bit 3 is crushed by arranging a single-tooth crushing assembly, a row of teeth crushing assembly and a block crushing assembly so that a rectangular cross-section can be quickly obtained. The rock mass around the three-tooth drill bit 3 is crushed by arranging a single-tooth crushing assembly, a row of teeth crushing assembly and a block crushing assembly so that a rectangular cross-section can be quickly obtained. The rock mass around the three-tooth drill bit 3 is crushed by arranging the ... rectangular cross-sections are compactly arranged with respect to each other, and the cross-section grooves finally formed have a small size, which meets the existing excavation construction requirements

[0046] See also Figure 6 and Figure 8 The tooth-row crushing assembly includes a plurality of first pneumatic devices 211 connected to the rigid frame 1. The bottom end of the first pneumatic device 211 is connected to a first tool holder 212. A row of first cutting teeth 213 are installed on the four sides of the first tool holder 212. The first cutting teeth 213 are arranged in a rectangular shape on the first tool holder 212.

[0047] When the present embodiment is working, the first pneumatic device 211 drives the first pick 213 through the first tool holder 212 to generate impact force on the rock mass, so that the first pick 213 can break the rock mass to meet the excavation requirements.

[0048] See also Figure 8 The block crushing assembly includes a plurality of second pneumatic devices connected to the rigid frame 1, the bottom end of the second pneumatic device is connected to a second tool holder 222, a second pick 223 is mounted on the second tool holder 222, and the second pick 223 is arranged in a block shape on the second tool holder 222.

[0049] Similarly, when the block crushing assembly is working, it also drives the second pick 223 through the second pneumatic device to generate impact force on the rock mass, thereby crushing the rock mass around the three-cone drill bit 1.

[0050] See also Figure 7 and Figure 8 The single-cutting tooth crushing assembly includes a plurality of third pneumatic devices 231 connected to the rigid frame 1. There are four third pneumatic devices 231 in total, which are respectively arranged at the four corners of the rigid frame 1. The bottom end of the third pneumatic device 231 is connected to a third tool holder 232, and a single third cutting tooth 233 is fixedly connected to the third tool holder 232.

[0051] In this embodiment, the single pick crushing assembly crushes the rock mass after the three-cone drill bit 1 crushes the rock mass, and it mainly acts on the four corners of the rectangular section to enable the rectangular section to be initially formed.

[0052] The first pick 213 and the second pick 223 have the same size, and the third pick 233 has a larger size than the first pick 213 or the second pick 223 .

[0053] See also Figure 2 , Figure 3 , Figure 10-12 The front end of the three-cone drill bit 1 exceeds the front end of the third pick 233 , and the front end of the third pick 233 exceeds the front ends of the second pick 223 and the first pick 213 .

[0054] When working, the three-cone drill bit 1 is the first to contact the rock mass. The three-cone drill bit 1 first excavates a circular section into the rock mass, and then the third pick 233 moves downward to crush the four corners to form a preliminary rectangular section; then the first pick 213 and the second pick 223 descend to impact and crush the rest of the area.

[0055] After the shaft is excavated to the required depth, due to the different heights of the three-cone drill bit 1, the third pick 233, the second pick 223 and the first pick 213, it will eventually form a cross section of different depths, which has little effect on the bottom; of course, the following operation method can also be adopted:

[0056] After the circular cross-section is formed, the entire device stops descending, and the first pneumatic device 211 / the second pneumatic device / the third pneumatic device 231 is used to drive the first pick 213, the second pick 223 and the third pick 233 to descend, and the surrounding of the circular cross-section is crushed so that the final bottom surface of the shaft remains flush.

[0057] In addition, the number of the first pick 213 and the second pick 223 can be adjusted according to the condition of the working rock formation. When the rock formation is harder, the first pick 213 and the second pick 223 should be denser; when the rock formation is brittle, the spacing between the first pick 213 and the second pick 223 can be appropriately expanded.

[0058] The gas pipeline 12 is provided with a valve for controlling the gas pipeline 12 .

[0059] See also Fig. 9 The first pneumatic device 211, the second pneumatic device and the third pneumatic device 231 have the same structure.

[0060] The first pneumatic device 211 / the second pneumatic device / the third pneumatic device 231 comprises an outer shell 2111, a cavity 2112 is formed inside the outer shell 2111, a slider 2113 is disposed in the cavity 2112, a connecting rod 2115 is disposed on the slider 2113, one end of the connecting rod 2115 extends downward to the outside of the cavity 2112, the connecting rod 2115 is connected to the first bracket 212 / the second bracket 222 / the third bracket 232, and further comprises a first transmission The first gas branch pipe 2116 and the second gas branch pipe 2117 are both connected to the gas pipeline 12, and the first gas branch pipe 2116 is connected to the interior of the cavity 2112 above the slider 2113, and the second gas branch pipe 2117 is connected to the interior of the cavity 2112 below the slider 2113, and the first gas branch pipe 2116 and the second gas branch pipe 2117 are both provided with solenoid valves (not shown in the figure).

[0061] In an embodiment of the present invention, the high-pressure air pump 5 inputs high-pressure gas into the cavity through the gas pipeline 12. At this time, the solenoid valve on the first gas branch pipe 2116 is opened, and the solenoid valve on the second gas branch pipe 2117 is closed, so that the high-pressure gas enters the cavity 2112 above the slider 2113. The high-pressure gas exerts force on the slider 2113 to move the slider 2113 downward, and then the slider 2113 drives the first bracket 212 / the second bracket 222 / the third bracket 232 to move downward, so that the first cutting tooth 213 / the second cutting tooth 223 / the third cutting tooth 233 acts on the rock to crush the rock; when it is not needed, the solenoid valve on the second gas branch pipe 2117 is opened, and then the solenoid valve on the first gas branch pipe 2117 is closed, so that the slider 2113 can move upward and return to its original position.

[0062] In this embodiment, a high-pressure air pump 5 is used to act on the first pneumatic device 211 / the second pneumatic device / the third pneumatic device 231 to drive the first pick 213 / the second pick 223 / the third pick 233 to crush the rock mass after the circular cross-section. Due to the free surface created by the three-tooth drill bit 1 and the third pick 233, the peak force of the remaining rock mass is significantly reduced, so that a rectangular cross-section can be formed quickly and conveniently. Compared with the existing technology, the formation of the rectangular cross-section is faster and more reliable, and there is no need for multiple milling processes. It has wide promotion and application value.

[0063] A plurality of pneumatic devices may be connected by a plurality of high-pressure air pumps 5, or a single high-pressure air pump 5 may be provided, and the gas pipeline 12 may be connected to the three pneumatic devices respectively, and an electrically controlled valve may be provided for individual control.

[0064] A transition sleeve portion 2114 is provided at the lower portion of the outer shell 2111, and a connecting rod 2115 is provided through the transition sleeve portion 2114, and the diameter of the connecting rod 2115 is equal to the inner diameter of the transition sleeve portion 2114. The connecting rod 2115 here mainly plays the role of connecting the slider 2113 and the first bracket 212 / the second bracket 222 / the third bracket 232, and a sealing rubber ring needs to be provided at the connection between the connecting rod 2115 and the transition sleeve portion 2114 to prevent leakage of high-pressure gas; similarly, a sealing rubber ring also needs to be provided at the connection between the slider 2113 and the inner wall of the cavity 2112.

[0065] See also Figure 3 and Figure 8 A plurality of grouting holes 13 are evenly arranged on the lower side of the rigid frame 1. The grouting holes 13 are connected to the grouting pump 10 arranged in the rigid frame 1 through the grouting pipe 11. Since the three-cone drill bit 1 and the first pick 213, the second pick 223 and the third pick 233 crush the rock mass, the crushed rock mass and the slurry are sucked out from the grouting holes 13 together with the slurry under the action of the grouting pump, thereby realizing the function of discharging.

[0066] There are three grout suction holes 13 in total, which are arranged in a circle around the three-cone drill bit 3.

[0067] The rigid frame 1 is equipped with multiple deflection correction structures. The rigid frame 1 is also provided with an electrical control system box 14. The electrical control system box 14 is electrically connected to the deflection correction structure. The deflection correction structure includes a total of sixteen deflection correction plates 6, which are installed around the middle and lower parts of the rigid frame 1. The deflection correction plates 6 are in the form of hydraulic controllers. The gyroscope in the electrical control system box 14 is responsible for detecting the posture of the entire rigid frame 1, and then transmits the data to the control system, and sends corresponding instructions to the hydraulic device that controls the deflection correction plates 6 to adjust the verticality of the rigid frame 1, so as to ensure the verticality of the shaft during excavation. The specific structural features and working principles of the deflection correction plates 6 are prior art and will not be repeated here.

[0068] During the working process of the present invention: the crawler mainframe 9 drives the rigid frame 1 to move to the desired position, and the rigid frame 1 is lifted and lowered by the twisted rope 8 and the suspension system 7. When excavating, the rigid frame 1 moves downward slowly as a whole, and the motor 4 is started. The motor 4 drives the three-cone drill bit 3 to rotate through the main shaft 15. The three-cone drill bit 3 first digs a cylindrical surface for the rock mass to be excavated; the drill bit 33 on the three-cone drill bit 3 will continuously rotate. When breaking the rock, the three-cone drill bit 3 has both impact, shear and compression damage, so the drill bit 33 can crush the surrounding rocks, so that the rock mass forms a cylindrical surface, and the rock mass is initially crushed, so as to facilitate the subsequent crushing process;

[0069] The edge crushing device is used to crush the areas that cannot be crushed by the three-cone drill bit 3. The single-cutting tooth crushing components are distributed around the rigid frame 1, and are used to crush the four corners of the rectangular section; the row-tooth crushing components are used to crush the rock mass around the three-cone drill bit 3, and the block crushing components are used to crush the areas that cannot be crushed by the first two crushing components;

[0070] The high-pressure air pump 5 inputs high-pressure gas into the cavity through the gas pipeline 12. At this time, the solenoid valve on the first gas branch pipe 2116 is opened, and the solenoid valve on the second gas branch pipe 2117 is closed, so that the high-pressure gas enters the cavity 2112 above the slider 2113. The high-pressure gas exerts force on the slider 2113 to move the slider 2113 downward, and then the slider 2113 will drive the first bracket 212 / the second bracket 222 / the third bracket 232 to move downward, so that the first pick 213 / the second pick 223 / the third pick 233 act on the rock to crush the rock; when it is not needed, the solenoid valve on the second gas branch pipe 2117 is opened, and then the solenoid valve on the first gas branch pipe 2117 is closed, so that the slider 2113 can move upward and return to its original position.

[0071] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A small-diameter rectangular-section vertical shaft excavation device suitable for hard rock, comprising a crawler mainframe connected to a rigid frame through a twisted rope and a suspension system, characterized in that: A motor is arranged inside the rigid frame, a main shaft is fixedly connected to the output shaft of the motor, a three-cone drill bit is connected to the lower end of the main shaft, an edge crushing device is arranged around the three-cone drill bit, and a high-pressure air pump is arranged inside the rigid frame, and the high-pressure air pump is connected to the edge crushing device through a gas pipeline; The three-cone drill bit comprises a mounting main plate connected to the main shaft, on which three vertically arranged mounting brackets are arranged, and the mounting brackets are all rotatably connected to the drill bit, and a plurality of crushing teeth are evenly arranged on the drill bit; The edge crushing device includes a row of teeth crushing assembly, a single pick crushing assembly and a block crushing assembly, the row of teeth crushing assembly includes a plurality of first pneumatic devices connected to the rigid frame, the bottom end of the first pneumatic device is connected to a first tool holder, a row of first picks are installed on the four sides of the first tool holder, and the first picks are arranged on the first tool holder in a rectangular shape; The block crushing assembly includes a plurality of second pneumatic devices connected to the rigid frame, the bottom end of the second pneumatic device is connected to a second tool holder, the second tool holder is equipped with a second pick, and the second pick is arranged in a block shape on the second tool holder; The single pick crushing assembly includes a plurality of third pneumatic devices connected to the rigid frame, and a total of four third pneumatic devices are provided, which are respectively arranged at the four corners of the rigid frame, and the bottom end of the third pneumatic device is connected to a third tool holder, and a single third pick is fixedly connected to the third tool holder; The front end of the three-cone drill bit exceeds the front end of the third pick, and the front end of the third pick exceeds the front ends of the second pick and the first pick.

2. The small-diameter rectangular-section vertical shaft excavation equipment suitable for hard rock according to claim 1, characterized in that: The first pneumatic device / the second pneumatic device / the third pneumatic device includes an outer shell, a cavity is opened inside the outer shell, a slider is arranged in the cavity, a connecting rod is arranged on the slider, one end of the connecting rod extends downward to the outside of the cavity, the connecting rod is connected to the first tool holder / the second tool holder / the third tool holder, and also includes a first gas branch pipe and a second gas branch pipe, the first gas branch pipe and the second gas branch pipe are both connected to the gas pipeline, and the first gas branch pipe is connected to the interior of the cavity above the slider, the second gas branch pipe is connected to the interior of the cavity below the slider, and solenoid valves are arranged on the first gas branch pipe and the second gas branch pipe.

3. The small-diameter rectangular-section vertical shaft excavation equipment suitable for hard rock according to claim 2, characterized in that: A transition sleeve portion is arranged at the lower part of the outer shell, a connecting rod is arranged through the transition sleeve portion, and a diameter of the connecting rod is equal to an inner diameter of the transition sleeve portion.

4. The small-diameter rectangular-section vertical shaft excavation equipment suitable for hard rock according to claim 1, characterized in that: A plurality of slurry suction holes are evenly arranged on the lower side of the rigid frame, and the slurry suction holes are connected to a slurry suction pump arranged in the rigid frame through a slurry suction pipe.

5. The small-diameter rectangular-section vertical shaft excavation equipment suitable for hard rock according to claim 1, characterized in that: A plurality of deviation-correcting structures are installed on the rigid frame, and an electrical control system box is also arranged inside the rigid frame. The electrical control system box is electrically connected to the deviation-correcting structures.

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