Modularized vertical milling and digging hole-forming equipment

Abstract

The invention discloses modularized vertical milling and digging hole-forming equipment which is suitable for power transmission line hole pile foundation construction under the hard rock geological condition in a mountainous area and comprises a revolution and rotation milling and digging power head, a pithead feeding platform, a material pumping device, a hydraulic pump station and a generator set. The revolution and rotation milling and digging power head crushes hard rocks through rotation and drills holes through revolution; the pithead feeding platform provides stable supporting and feeding pressure for the milling and digging power head; the drill rod also serves as a slag making pipe, is connected with the revolution and rotation milling and digging power head and is used for extracting disintegrating slag through air negative pressure formed by the material extracting device, and slag removal is assisted by an air cannon; and the hydraulic pump station and the generator set respectively provide power for the milling and digging hole-forming operation and the material pumping device. The equipment adopts a modular design, is convenient to transport and quickly assemble, and adapts to complex terrains in mountainous areas and hard rock geological conditions. The device has the characteristics of efficient rock breaking capacity, precise hole forming, negative pressure deslagging mechanism, high adaptability to complex terrains and hard rock geology and the like, the construction efficiency and safety are improved, and the efficient mechanical construction requirement is met.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of power transmission line engineering, and particularly relates to a modular vertical milling and digging hole forming equipment. BACKGROUND

[0002] The tower site of a mountainous power transmission line is often located in a mountainous area with complex terrain and construction environment, and the geological condition is mainly hard rock, which causes great difficulty in the excavation of a large-diameter vertical hole pile foundation of a power transmission tower. In the aspect of rock breaking technology, the traditional blasting is limited by the poor controllability of the breaking range, safety and environmental protection factors; the breaking hammer and the rock drill can only break small-area rock, and the efficiency is low; the splitting method needs a free face, and is not suitable for drilling a vertical large-diameter circular hole in an integral rock. In the aspect of large-diameter (1-2m) vertical hole forming machinery, the rotary drilling rig uses a hydraulic motor to drive a drill rod to rotate, a bottom cutting tooth bit cuts rock and soil, and drill cuttings are lifted to the outside of the hole by a spiral blade, which is only suitable for low-strength rock and soil, and the hard rock excavation capacity is insufficient, and the rotary drilling rig is large in size and weight, and it is difficult to reach the work point under the condition of no road in a mountainous area; the shaft sinking equipment applied in tunnels and coal mines is large in size, and is suitable for super large-diameter (greater than 2m) deep space construction at a fixed point, and is not suitable for point-line distributed construction at the tower site of a power transmission line, and a new equipment with strong hard rock breaking capacity, small size, modularity and high mobility needs to be developed for vertical circular hole forming.

[0003] To solve the above problems, CN114000553A, CN114030090A and CN216442840U propose a method of rotating a hexagonal transmission shaft to drive different cutting tool bits to make vertical rotation, and rotating the whole cutting device body horizontally to cut rock and soil. The cutting device can move under the driving of a lifting device to drill a circular hole in rock and soil. In these methods, a simple single hard alloy cutter is used, which is small in mass and cannot cut hard rock; the cutter revolution and rotation use mechanical transmission such as chain and gear, which is low in efficiency and easy to be stuck when contacting with hard rock; therefore, the hard rock breaking capacity is insufficient, and it is only suitable for soft rock geology (≤20MPa).

[0004] Milling technology is highly modular and efficient in breaking rock, and has been applied to horizontal drilling projects for tunnels, ditches, and municipal pipelines. Based on milling technology, CN115898280A proposes a drilling scheme that uses a single vertical milling head installed on a rotary platform for local rock breaking, hydraulic cylinders to control the tilt angle and position of the milling head for large-area rock breaking, a lifting bucket for material discharge, and a casing for lifting and lowering. CN111877972A and CN111877972B propose a rock breaking scheme that uses multiple cutting head assemblies (milling heads) for rock breaking, hydraulic cylinders to adjust the angle of the cutting head assemblies, a grab bucket for material discharge, and hydraulic cylinders for lifting and lowering. While these solutions address the problems of hard rock crushing and drilling to some extent, they all encounter several challenges in practical operation. For example, adjusting the milling head angle using hydraulic cylinders involves changes in the power head's position in the vertical direction, requiring corresponding adjustments to the lifting mechanism. However, ensuring the appropriate position for contact with hard rock and achieving efficient rock breaking remains a challenge. During rock breaking, the entire frame bears complex forces in the transverse, longitudinal, and torsional directions. Adjusting the power head position with hydraulic cylinders alters the stress structure of the entire device, making the design and strength of the frame difficult to guarantee. Using lifting buckets or grab buckets for material discharge only allows for partial discharge in space and intermittent discharge in time, affecting overall drilling efficiency. Currently, drilling diameters for power transmission line foundations within the 1.2-2m range requires significant power, but installing complex power and discharge devices within relatively confined spaces presents another challenge.

[0005] The root cause of these problems lies in the insufficient power of existing rock-breaking equipment, inflexible structural design, lack of efficient slag removal mechanism, and poor adaptability to complex mountainous terrain and hard rock geology, making it difficult to meet the needs of efficient, precise, and environmentally friendly mechanized construction. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention provides a modular vertical milling drilling equipment for the construction of power transmission line pile foundations under hard rock geological conditions in mountainous areas, thus solving the aforementioned problems.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a modular vertical milling drilling equipment, comprising: The rotating milling head breaks up hard rock by rotating on its own axis and drills round holes by revolving around the sun. The pithead feed platform, through the drill rod, fixes the self-rotating milling power head to the pithead feed platform and provides feed pressure; The material extraction device, with the drill rod also serving as the slag extraction pipe, is connected to the power head of the self-rotating milling machine and is used for negative pressure extraction of slag. The hydraulic pump station provides hydraulic power for the modular vertical milling and drilling equipment; The generator set provides power for the material extraction device.

[0008] Further, the power head of the public and self-rotating milling and digging includes two self-rotating milling and digging assemblies, two self-rotation motors, a connecting plate, a public rotation bearing, a public rotation motor, a rotary connector and a slag suction pipe, the self-rotating milling and digging assembly is provided with two transversely arranged milling and digging heads, the milling and digging head surface is embedded with hard alloy milling teeth for breaking hard rock with a single-axis compressive strength of up to 55 MPa and suitable for soft soil digging, the two self-rotating milling and digging assemblies are respectively installed on the public rotation bearing through two connecting plates, the public rotation motor is installed on the public rotation bearing for controlling the public rotation of the two self-rotating milling and digging assemblies, the two self-rotation motors are respectively installed on the two self-rotating milling and digging assemblies for driving the self-rotation of the two milling and digging heads on the self-rotating milling and digging assemblies, the rotary connector and the slag suction pipe are inserted into the public rotation bearing, the upper end of the rotary connector is connected with the hydraulic pump station through an oil pipe, the lower end of the rotary connector is connected with the self-rotation motor through an oil pipe, the lower end of the slag suction pipe is located between the two self-rotating milling and digging assemblies, and the upper end of the slag suction pipe is connected with a drill rod.

[0009] Further, the pit feeding platform includes a base, a fixing frame, a vertical screw rod, a worm reducer, an auxiliary frame, a lifting drive motor and a ground anchor, the base is a rectangular steel structure and is installed at a specified position through the ground anchor, the fixing frame is used for fixing a drill rod, four worm reducers are installed on the base, the fixing frame is installed in the worm reducers through four vertical screw rods, the lifting drive motor is installed on the worm reducers, the lifting drive motor drives the vertical screw rods to control the fixing frame to move up and down through the worm reducers, thereby providing a downward pressure and an upward pulling force on the drill rod, the drill rod is a hollow cylindrical high-strength steel structure, the hydraulic support shoe includes three hydraulic oil cylinders distributed at an angle of 120°, which is used for supporting the drill rod and reducing vibration amplitude, and an air cannon is installed on the drill rod, which is used for preventing slag from blocking.

[0010] Further, the material extraction device includes a tank body, a slag storage chamber, a filter element, a fan, a slag guide plate, a material falling pipe and a material extraction pipe, the slag storage chamber, the filter element and the fan are arranged in the tank body, the slag guide plate is arranged obliquely below the filter element, the material falling pipe is arranged on the tank body and communicates the inside of the tank body with the outside, the material extraction pipe is connected with the material falling pipe, an observation window is arranged on the tank body and is used for observing the inside of the slag storage chamber, a hydraulic cylinder is arranged on the tank body, a base is arranged below the tank body, the tank body is hingedly connected with the base, the hydraulic cylinder body is fixed on the base, and the top end of the hydraulic cylinder piston rod is hingedly connected with the tank body.

[0011] Further, the hydraulic pump station includes two variable displacement piston pumps, one of which drives the self-rotation of the power head of the public and self-rotating milling and digging, and the other of which drives the public rotation of the power head of the public and self-rotating milling and digging, and the hydraulic pump station is installed on the tracked platform.

[0012] The power head of the public and self-rotating milling and digging is fixed to the pit mouth feeding platform through the drill rod, the power head of the public and self-rotating milling and digging is broken under the driving of the internal self-rotating motor and is formed into a circular hole with a diameter of 1.2-1.6 m under the driving of the public rotation motor through the public rotation slewing bearing, the drill rod is used as a slag outlet channel, the material extraction device extracts the broken slag through negative pressure, and the hydraulic pump station and the generator set provide power.

[0013] The present application has the following beneficial effects: 1) High-efficiency rock breaking: the double milling and digging heads of the power head of the public and self-rotating milling and digging are equipped with hard alloy milling teeth, are driven by the self-rotating motor and the public rotation motor, and break medium and high strength hard rock, the efficiency is improved compared with rotary drilling, and is superior to the prior art (rock breaking ≤ 30 MPa); 2) Precise hole forming: the public and self-rotating mechanism is combined with the connecting plate to adjust the diameter of 1.2-2 m, the vertical lead screw and the level gauge of the pit mouth feeding platform ensure the perpendicularity, and the mixed geology of soft and hard rock is adapted; 3) Negative pressure slag discharge: the material extraction device extracts the deep hole broken slag through the suction slag pipe and the drill rod by the fan, the broken slag can be effectively extracted, the setting of the suction slag pipe improves the broken slag extraction efficiency, the air cannon can prevent blockage, and the slag discharge efficiency is improved compared with the intermittent work of the grab bucket; 4) The present application has high-efficiency slag discharge mechanism and high adaptability to complex terrain and hard rock geology in mountainous areas, and meets the requirements of efficient, precise and environmentally-friendly mechanized construction. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the architecture of the present application; Figure 2 It is a schematic diagram of the three-dimensional structure of the power head of the public and self-rotating milling and digging in the present application; Figure 3 It is a schematic diagram of the side structure of the power head of the public and self-rotating milling and digging in the present application; Figure 4 It is another schematic diagram of the side structure of the power head of the public and self-rotating milling and digging in the present application; Figure 5 It is a top view of the power head of the public and self-rotating milling and digging in the present application; Figure 6 It is a bottom view of the power head of the public and self-rotating milling and digging in the present application; Figure 7 It is a schematic diagram of the pit mouth feeding platform in the present application; Figure 8 It is a schematic diagram of the drill rod of the pit mouth feeding platform in the present application; Figure 9 It is a schematic diagram of the hydraulic support shoe of the pit mouth feeding platform in the present application; Figure 10 It is a schematic diagram of the cross section of the material extraction device in the present application. DETAILED DESCRIPTION

[0015] In order to make the objectives, technical solutions and advantages of the present application clearer and more comprehensible, the present application will be further described in detail below with reference to the drawings and examples. However, it should be understood that the specific examples described herein are only used to explain the present application and are not intended to limit the scope of the present application.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description herein is for describing the specific embodiments only and is not intended to be limiting of the present application.

[0017] As shown in Figures 1-9 A modular vertical milling and excavating hole forming equipment comprises: A public and self-rotating milling and excavating power head 100 breaks hard rock by self-rotation and drills a circular hole by public rotation.

[0018] A pit mouth feeding platform 200 fixes the public and self-rotating milling and excavating power head 100 on the pit mouth feeding platform 200 through the drill pipe 201.

[0019] A material extraction device 400, the drill pipe 201 serving as a slag discharge pipe, is connected to the public and self-rotating milling and excavating power head 100 for negative pressure extraction of slag.

[0020] A hydraulic pump station 500 provides hydraulic power for the modular vertical milling and excavating hole forming equipment.

[0021] A generator set 600 provides power for the modular vertical milling and excavating hole forming equipment and the material extraction device.

[0022] The public and self-rotating milling and excavating power head 100 comprises two self-rotating milling and excavating assemblies, two self-rotating motors 102, a connecting plate 103, a public rotation slewing bearing 104, a public rotation motor 105, a rotary connector 106 and a slag suction pipe 107, the self-rotating milling and excavating assemblies are provided with two transversely arranged milling and excavating heads 101, the milling and excavating heads 101 are embedded with hard alloy milling teeth 1011 on the surface, for breaking hard rock with a uniaxial compressive strength of up to 55 MPa and suitable for soft soil excavation, the two self-rotating milling and excavating assemblies are respectively installed on the public rotation slewing bearing 104 through the two connecting plates 103, the public rotation motor 105 is installed on the public rotation slewing bearing 104 for controlling the public rotation of the two self-rotating milling and excavating assemblies, the two self-rotating motors 102 are respectively installed on the two self-rotating milling and excavating assemblies for driving the two milling and excavating heads 101 on the self-rotating milling and excavating assemblies to rotate, the rotary connector 106 and the slag suction pipe 107 are inserted into the public rotation slewing bearing 104, the upper end of the rotary connector 106 is connected to the hydraulic pump station through an oil pipe, the lower end of the rotary connector 106 is connected to the self-rotating motor 102 through an oil pipe, the lower end of the slag suction pipe 107 is located between the two self-rotating milling and excavating assemblies, and the upper end of the slag suction pipe 107 is connected to the drill pipe.

[0023] The self-rotating milling and digging assembly comprises a self-rotating motor 102, a gear transmission mechanism, and milling and digging heads 101, the upper end of the connecting plate 103 is installed on the revolving support 104, the gear transmission mechanism is installed on the lower end of the connecting plate 103 through bolts, the gear transmission mechanism has two output ports arranged on the two sides of the housing end, and the two output ports are located on the same straight line, the self-rotating motor 102 is installed on the output port of the gear transmission mechanism, the self-rotating motor 102 is connected with the rotating connector 106 through an oil pipe, and the two milling and digging heads 101 are installed on the two output ports of the gear transmission mechanism respectively, the self-rotating motor 102 transmits power to the milling and digging heads 101 through the gear transmission mechanism, and drives the milling and digging heads 101 to rotate.

[0024] The revolving and self-rotating milling and digging power head 100 is responsible for forming a circular hole with a diameter of 1.2-2 m through self-rotating rock breaking and revolution, and breaking hard rock with a single-axis compressive strength of up to 55 MPa.

[0025] The pit feeding platform 200 comprises a base 205, a fixing frame 202, a vertical lead screw 203, a worm reducer 204, an auxiliary frame 206, a lifting drive motor 207, and a ground anchor 208, and provides down pressure, up pulling force and verticality control.

[0026] The drill rod 201 and the hydraulic support shoe 300: the drill rod is a hollow cylindrical structure, which is used for power transmission and slag discharge channel, the hydraulic support shoe 300 is righted through three hydraulic cylinders, the air cannon prevents blockage, and the deep hole slag discharge efficiency is improved.

[0027] The material extraction device 400: the broken slag is extracted through negative pressure.

[0028] The hydraulic pump station 500: two variable plunger pumps (A4VG, 25 MPa, 120 L / min) are arranged, which respectively drive the milling and digging and feeding systems, and are provided with a 4TNV98 engine (50 kW).

[0029] The generator set 600: 100 kW, 380 V, 50 Hz, which is used for supplying power to the material extraction device.

[0030] Figure 1 The overall structure of the modular vertical milling and digging hole forming equipment is shown, which comprises a plurality of subsystems and integrated layout, and meets the requirements of hole forming diameter of 1.2-2 m, drilling depth of 15 m and rock breaking capacity of 55 MPa. The modular design is suitable for 2t cableway transportation, and mechanical auxiliary disassembly and assembly improve the site efficiency.

[0031] Based on the base 205, the base is leveled and fixed by the ground anchor 208; the vertical lead screw 203, the auxiliary frame 206 and the fixing frame 202 are installed to form the pit feeding platform 200; the revolving and self-rotating milling and digging power head 100 is assembled; the material extraction device (negative pressure of 68.6 kPa), the hydraulic pump station (25 MPa) and the generator set (100 kW) are connected to complete the site layout.

[0032] The base 205 and the ground anchor 208 provide stable support to counteract the rock breaking reaction force; the milling and excavating power head rotates to break rock and revolves to form a hole, and the drill rod transmits power; negative pressure suction extracts debris through the drill rod and the slag suction pipe.

[0033] Figures 2-4 The overall structure of the milling and excavating power head 100 is shown, which is the core component of the modular vertical milling and excavating hole forming equipment, responsible for breaking hard rock with a uniaxial compressive strength of not less than 55 MPa and forming a vertical circular hole with a diameter of 1.2-1.6 m. The power head 100 is composed of multiple modular components, which realizes efficient construction through self-rotating rock breaking, revolving hole forming and negative pressure slag removal, and its modular structure is suitable for 2t cableway transportation.

[0034] As shown in Figures 2-4 , the milling and excavating power head 100 includes the following components: Two milling and excavating heads 101 are oppositely arranged at the free end of the power head 100, in a transverse cylindrical structure.

[0035] In one embodiment, the milling and excavating head shell is made of high-strength cast steel and is configured to break hard rock with a uniaxial compressive strength of not less than 55 MPa by self-rotation and is suitable for soft soil excavation; the gear transmission mechanism is fixed to the connecting plate 103 by screws, which are evenly distributed around the flange.

[0036] Two self-rotating motors 102 are connected to the self-rotating shaft of the milling and excavating head 101 through the gear transmission mechanism, fixed to the connecting plate 103, and the screws are arranged in an equilateral triangle.

[0037] The surface of the connecting plate 103 is sprayed with a 0.2mm thick epoxy anticorrosive coating. One end is fixed to the revolving support 104 by bolts, and the other end is connected to the gear transmission mechanism by detachable screws, with four groups of hole positions.

[0038] The rotary connector 106 is in a cylindrical shape, with a high-strength steel main body and a stainless steel internal four-way channel (two oil inlet ways, one oil return way and one oil discharge way); it is fixed to the top of the revolving support 104 by screws and connected to the hydraulic pump station oil pipe through a quick clamp, with a fluororubber sealing ring.

[0039] The slag suction pipe 107 is a hollow cylindrical steel structure with a corrosion-resistant coating on its surface, coaxially arranged between the two milling and excavating heads 101 and the revolving support 104, and is fixed to the flange to connect the external debris extraction device by bolts, with a rubber dustproof cover at the top.

[0040] In some examples as shown in Figure 7 , the pit feeding platform 200 includes: The fixed frame 202 is configured to connect the vertical lead screw 203 via a sliding sleeve. The fixed frame 202 is connected to the vertical lead screw 203 via a bolt.

[0041] The vertical lead screw 203 is made of four high-strength alloy steel rods with chrome-plated surfaces. The vertical lead screw 203 is connected to the fixed frame 202 via a precision nut, and is bolted to the top of the auxiliary frame 206 and embedded in the base 205. When the drill rod 201 is lengthened, a 2t load-bearing bayonet support is configured.

[0042] The worm reducer 204 is installed at the bottom of the fixed frame 202. The worm reducer 204 is connected to the lifting drive motor 207 via a shaft coupling, and is bolted to the fixed frame 202.

[0043] The auxiliary frame 206 is coated with a corrosion-resistant coating on its surface, and is bolted to the four vertical lead screws 203 to enhance the rigidity of the frame and resist the reaction force during rock breaking.

[0044] The lifting drive motor 207 is a hydraulic motor. The lifting drive motor 207 transmits power to the worm reducer 204 to drive the vertical lead screw 203, and is bolted to the base 205.

[0045] The ground anchor 208 is a spiral anchor rod or a rock chemical anchor rod. The installation depth is adjusted according to the geology (1m for hard rock and 1.5m for soft soil).

[0046] In operation, the base 205 and the ground anchor 208 counteract the reaction force of rock breaking, and the lifting drive motor 207 provides downward pressure and upward pulling force through the worm reducer 204 and the vertical lead screw 203. The drill rod 201 is welded to the fixed frame 202, and the fixed frame 202 is provided with reinforcing ribs to enhance the strength of the fixed frame 202. The vertical lead screw 203 and the auxiliary frame 206 maintain the verticality. The main components are the base 205 and the vertical lead screw 203, which are responsible for providing structural support and feeding functions. The auxiliary components include the fixed frame 202, the worm reducer 204, the auxiliary frame 206, the lifting drive motor 207, and the ground anchor 208, which assist in clamping, stabilizing feeding, and assembly.

[0047] Figure 8 And Figure 9 The drill rod 201 and its hydraulic support shoe 300 are described in detail. The drill rod 201 is used as the basis for transmitting power and serving as a slag discharge channel, and the hydraulic support shoe 300 enhances stability.

[0048] As shown in Figure 8 The drill rod 201 is made of hollow cylindrical high-strength steel, each section is 0.75m long, the diameter is 120mm, the wall thickness is 10mm, and the inner diameter is 100mm.

[0049] In some embodiments, the inner wall of the drill rod 201 is sprayed with a polytetrafluoroethylene coating (thickness 0.1 mm, friction coefficient ≤0.1) to reduce the adhesion of slag (adhesion rate ≤5%); the outer wall of the drill rod 201 is sprayed with anticorrosive paint (thickness 0.2 mm), with durability ≥10 years, and resistance to mountainous humidity (humidity 90%).

[0050] In some embodiments, the drill rod 201 and its hydraulic support shoe 300 are configured to transmit power, serve as a slag outlet channel, and improve the stability and slagging efficiency of the deep hole through the hydraulic support shoe 300 and the air cannon.

[0051] As shown in Figure 9 , the hydraulic support shoe 300 includes three hydraulic cylinders 301, which are evenly distributed at an angle of 120° on the hydraulic support shoe 300, and the hydraulic support shoe 300 is sleeved on the outer wall of the drill rod 201. The hydraulic control valve adjusts the thrust according to the soil quality at the bottom of the hole (hard rock 500 kN, soft soil 300 kN) and automatically centers. The oil cylinder is connected to the control valve through a 10 mm diameter hydraulic pipe.

[0052] In some embodiments, the scheme of the present disclosure also includes an air cannon (not shown) installed on the bottom section of the drill rod 201 (500 mm from the bottom of the hole), with an action distance of 2 m and a jet pressure of 0.8 MPa. The air cannon is a circular pressure vessel fixed to the outer wall of the drill rod 201 by a clamping ring (diameter 130 mm, clamping force 500 N, fixed to 2 M10 bolts, hole diameter 6 mm); the air supply is provided by a compressor (not shown) through a hose, with intermittent control (2 times per minute, 0.5 seconds each time, solenoid valve response time 0.1 s), covering an inner diameter of 100 mm of the drill rod 201, and preventing slag from blocking.

[0053] The main body of the cast drill rod 201 is sprayed with a 0.1 mm polytetrafluoroethylene coating and a 0.2 mm anticorrosive paint, and an M50 thread (pitch 5 mm) is machined, with an O-ring installed, and multiple sections (such as 20 sections) connected by threads.

[0054] In operation, the drill rod 201 transmits the downward pressure, the inner diameter serves as a slag outlet channel, and the polytetrafluoroethylene coating reduces adhesion. The three hydraulic cylinders 301 on the hydraulic support shoe 300 centralize the drill rod 201. The air cannon cleans the slag at a jet pressure of 0.8 MPa, ensuring smooth negative pressure extraction. The main component is the drill rod 201, which is responsible for power transmission and slagging functions; the auxiliary components include the hydraulic support shoe 300 (centralization) and the air cannon (anti-blocking); the drill rod 201 and its hydraulic support shoe 300 improve the deep hole slagging efficiency through lightweight design and high-efficiency anti-blocking measures, solving the problems of deep hole slagging and stability.

[0055] In some other embodiments, the modular vertical milling and excavating hole forming equipment of the present disclosure also includes an extraction device 400. The extraction device 400 uses negative pressure slagging and a fan to solve the problem of narrow space and deep hole slagging.

[0056] As Figure 10 shown (the arrows in the figure are the directions of the airflow flow), the material extraction device 400 includes a tank body 401, a residue storage chamber 402, a filter element 403, a fan 404, a residue guide plate 405, a material falling pipe 406, and a material extraction pipe 407. The residue storage chamber 402, the filter element 403, and the fan 404 are arranged in the tank body 401. The residue guide plate 405 is arranged obliquely below the filter element 403. The material falling pipe 406 is arranged on the tank body 401 and is in communication with the inside of the tank body 401 and the outside. The material extraction pipe 407 is connected with the material falling pipe 406. An observation window 408 is arranged on the tank body 401 and is used for observing the inside of the residue storage chamber 402. A hydraulic cylinder 410 is arranged on the tank body 401. A base 411 is arranged below the tank body 401. The tank body 401 is hingedly connected with the base 411. The cylinder body of the hydraulic cylinder 410 is fixed on the base 411. The top end of the piston rod of the hydraulic cylinder 410 is hingedly connected with the tank body 401. The tank body 401 is designed in a high-strength sealed manner. The inner wall is treated for corrosion resistance to ensure that a stable negative pressure environment can be maintained during operation of the device and to provide a basic condition for the material extraction process. One end of the material falling pipe 406 extends to a position inside the tank body 401 close to the filter element 403 (i.e., an air outlet). The other end is provided with a quick plug connection port.

[0057] The fan 404 is the power core of the material extraction device 400. It is installed in a separate chamber inside the tank body 401. After being started, it forms a negative pressure field inside the tank body 401 by high-speed rotation. The material (including residue) in the outside environment is sucked into the inside of the tank body 401 through the material extraction pipe 407 under the action of atmospheric pressure, realizing automatic material extraction operation. To prevent residue particles (especially hard gravel and metal debris) mixed in the material extraction process from entering the fan 404 with the airflow, causing wear, jamming, or even burning of the fan impeller, the filter element 403 is precisely arranged between the air inlet end of the fan 404 and the air outlet of the material falling pipe 406. The filter element 403 adopts a high-density stainless steel filter screen and a composite fiber filter material superimposed structure. The screen aperture is controlled at 0.5-2 mm (adapted to the size of common residue particles), which can efficiently intercept residue impurities and ensure smooth airflow, avoiding negative pressure loss. The sludge intercepted by the filter element 403 will slide down along the sludge guide plate 405 inclined below the filter element 403 under the action of gravity, and finally concentrate into the sludge storage chamber 402 located inside the tank body 401. The inner wall of the sludge storage chamber 402 is paved with wear-resistant rubber pads to prevent the tank body 401 from being worn out due to long-term friction of the sludge; the tank body 401 is provided with a sealing discharge door 409 which is opened outward, and a high-temperature-resistant silicone sealing ring is installed on the edge of the sealing discharge door 409 to ensure the sealing performance of the device during operation. When the sludge storage chamber 402 reaches the upper limit of the capacity (which can be observed through the observation window 408), the hydraulic cylinders 410 symmetrically installed on both sides of the tank body 401 need to be started: the cylinder body of the hydraulic cylinder 410 is fixed on the base 411, and the top end of the piston rod of the hydraulic cylinder 410 is hinged to the tank body 401, and the tank body 401 is driven to tilt around the hinge point of the base 411 through the synchronous extension and contraction of the hydraulic cylinder 410, and the tilt angle can be accurately controlled at 15-25° (both to ensure the smooth sliding of the sludge and to avoid the imbalance of the center of gravity caused by excessive tilting of the tank body 401); after the tank body 401 is tilted in place, the sealing discharge door 409 is opened, and the sludge in the sludge storage chamber 402 slides out along the inclined bottom of the sludge storage chamber 402 under the action of gravity, completing the dumping operation. After the dumping is completed, the hydraulic cylinder 410 is retracted to drive the tank body 401 to return to the original position, and the sealing discharge door 409 is closed to resume the material pumping operation, without the need to disassemble the device components, which is suitable for the cleaning needs of large or high-viscosity sludge, and improves the operation safety and efficiency. The whole structure is designed in an integrated manner of "material pumping - filtering - sludge storage - tilting and dumping", which not only ensures the material pumping efficiency, but also effectively protects the fan components and prolongs the service life of the whole device.

[0058] In some other examples, the modular vertical mill and excavate hole making apparatus of the present disclosure further includes a hydraulic pump station 500 and a generator set 600.

[0059] The two hydraulic pump stations 500 and the generator set 600 are based on pump stations and generators to provide power for the mill and excavate and auxiliary systems, ensuring high energy density (25 MPa, 120 L / min) and track mobility, suitable for mountain construction.

[0060] In some embodiments, the modular vertical mill and excavate hole making apparatus includes two hydraulic pump stations 500 configured to provide hydraulic power to drive the mill and excavate hole making operation. Each hydraulic pump station 500 includes a variable displacement piston pump, model A4VG, displacement 125 ml / r, output pressure 25 MPa, and maximum flow rate per way 120 L / min. The first hydraulic pump station 500 is operatively connected to the revolving motor of the double mill and excavate head and configured to supply hydraulic oil thereto; the second hydraulic pump station 500 is operatively connected to the revolving motor, the lifting motor and other hydraulic cylinders and configured to supply hydraulic oil thereto. The pump is designed to withstand at least 150% overload capacity, and the peak pressure can reach 37.5 MPa. The pump station is equipped with a cooling system including a fan with a power of 500 W to maintain the working temperature at 70°C or below.

[0061] The hydraulic pump station 500 is driven by a 4TNV98 engine with an output power of 50 kW, a weight of 200 kg, a fuel consumption rate of no more than 10 L / h, an oil tank capacity of 100 L, and a continuous operation time of 8 hours. The hydraulic oil is delivered through an oil pipe with a diameter of 20 mm, a pressure resistance of 30 MPa, and a length of 30 m. The oil pipe is managed by an electric winch with a diameter of 1 m, which is driven by a 1 kW motor and has a winding and unwinding time of no more than 3 minutes. The oil pipe is connected to the milling and excavating power head through a quick connector with a pressure resistance of 30 MPa to ensure sealing.

[0062] In some embodiments, the equipment further comprises a generator set 600 configured to supply power to the material extraction device.

[0063] In operation, the hydraulic pump station 500 drives the rotation motor, the revolution motor, and the lifting motor, enabling the milling and excavating power head to break hard rock with a uniaxial compressive strength of up to 55 MPa. The generator set 600 provides power for the material extraction device, ensuring the extraction of slag under negative pressure.

[0064] The main components of the hydraulic pump station 500 are the pump and the engine, which are responsible for providing hydraulic power; the main component of the generator set 600 is the generator, which is responsible for power supply.

[0065] The public-rotary milling and excavating power head is driven by a lifting motor (rated torque 1130 N·m, flow 630 ml / r, rated pressure 12.5 MPa) to move downward along four vertical lead screws (diameter 50 mm, length 2 m, high-strength alloy steel, surface chromium plating thickness 0.05 mm) at a speed of 0.3 m / min, providing a downward pressure of 3.2 t. The double milling and excavating head (diameter 370 mm, radius 0.185 m) is driven by a rotary motor (torque 1225 N·m, rotation speed 200 r / min), and 32 hard alloy milling teeth (single tooth size 10 mm x 8 mm, pressure resistance ≥ 600 MPa) break hard rock with a uniaxial compressive strength of 55 MPa under a single-point force of 550 N (8 teeth are simultaneously subjected to force), a public-rotation motor (torque 3000 N·m, rotation speed 8 r / min) drives a public-rotation bearing (diameter 500 mm, 100 20 mm ball bearings) to form a circular hole with a diameter of 1.2-1.6 m, the rock breaking speed is 0.5 m / h, and the verticality deviation is not more than 0.5%. The drill rod hydraulic support shoe is provided with three hydraulic cylinders (thrust 500 kN, diameter 50 mm, stroke 200 mm), which are sleeved on the outer wall of the drill rod 201, and the force is adjusted by a hydraulic control valve (pressure 10 MPa) (hard rock 500 kN, soft soil 300 kN), the automatic centering deviation is ≤0.5 mm, and the vibration amplitude is not more than 0.05 mm. The drill rod is provided with an air cannon (installed on the hole bottom section 500 mm away from the hole bottom, action distance 2 m, jet pressure 0.8 MPa), which is supplied with air through a 15 kW compressor (flow 2 m³ / min, pressure 1 MPa) through a diameter 20 mm hose (pressure resistance 2 MPa) to clear the blockage intermittently at a rate of 2 times per minute and 0.5 seconds each time (solenoid valve response 0.1 s), and the blockage rate is less than 5%.

[0066] The lifting motor pulls out the public-rotary milling and excavating power head with a 10 t upward pulling force through the vertical lead screw and worm gear reducer, and the pulling-out time is not more than 10 minutes.

[0067] In summary, the equipment of the present disclosure is based on a base, a ground anchor fixes the pit mouth feeding platform, and supports the public-rotary milling and excavating power head. The double milling and excavating head breaks 55 MPa rock through the rotary motor, the public-rotation motor forms a 1.2-2 m circular hole, and the rotary connector stabilizes oil supply. The drill rod transmits downward pressure and serves as a slag outlet channel, the hydraulic support shoe is centered, and the air cannon prevents blockage. The suction pipe of the suction device extracts the crushed slag, and the generator supplies power. The hydraulic pump station drives the milling and excavating and feeding.

[0068] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A modular vertical mill and excavate hole making apparatus, characterized by, Comprise: The public rotation milling power head, through the rotation of broken hard rock, through the public rotation drilling round hole; The pit feeding platform, through the drill pipe, the public rotation milling power head is fixed on the pit feeding platform; The material extraction device, the drill pipe is used as the slag discharge pipe, which is connected with the public rotation milling power head and used for negative pressure extraction of the broken slag; The hydraulic pump station provides hydraulic power for the modular vertical milling and digging hole forming equipment; The generator set provides power for the modular vertical milling and digging hole forming equipment.

2. A modular vertical mill and cut hole making apparatus according to claim 1, wherein, The public rotation milling power head comprises two rotation milling assemblies, two rotation motors, a connecting plate, a public rotation slewing bearing, a public rotation motor, a rotary connector and a slag suction pipe, the rotation milling assembly is provided with two transversely arranged milling heads, the milling head surface is embedded with hard alloy milling teeth, which is used for breaking hard rock and suitable for soft soil digging, the two rotation milling assemblies are respectively installed on the public rotation slewing bearing through two connecting plates, the public rotation motor is installed on the public rotation slewing bearing and used for controlling the public rotation of the two rotation milling assemblies, the two rotation motors are respectively installed on the two rotation milling assemblies and used for driving the two milling heads on the rotation milling assembly to rotate, the rotary connector and the slag suction pipe are inserted on the public rotation slewing bearing, the upper end of the rotary connector is connected with the hydraulic pump station through an oil pipe, the lower end of the rotary connector is connected with the rotation motor through an oil pipe, the lower end of the slag suction pipe is located between the two rotation milling assemblies, and the upper end of the slag suction pipe is connected with the drill pipe.

3. A modular vertical mill and cut hole making apparatus according to claim 1 wherein, The pit feeding platform comprises a base, a fixing frame, a vertical screw rod, a worm reducer, an auxiliary frame, a lifting drive motor and a ground anchor, the base is a rectangular steel structure, is installed at a specified position through the ground anchor, and the fixing frame is used for fixing the drill pipe, four worm reducers are installed on the base, the fixing frame is installed in the worm reducers through four vertical screw rods, the lifting drive motor is installed on the worm reducers, the lifting drive motor drives the vertical screw rod to control the fixing frame to move up and down through the worm reducer, and the down pressure and the pulling force of the drill pipe are provided, the drill pipe is a hollow cylindrical high-strength steel structure, the hydraulic support shoe comprises three hydraulic oil cylinders which are distributed at an angle of 120° and are used for supporting the drill pipe and reducing the vibration amplitude, and the drill pipe is provided with an air cannon.

4. A modular vertical mill and cut hole making apparatus according to claim 1 wherein, The material extraction device comprises a tank body, a slag storage chamber, a filter element, a fan, a slag guide plate, a material falling pipe and a material extraction pipe, the slag storage chamber, the filter element and the fan are arranged in the tank body, the slag guide plate is arranged obliquely below the filter element, the material falling pipe is arranged on the tank body, the material falling pipe is connected with the inside of the tank body and the outside, the material extraction pipe is connected with the material falling pipe, an observation window is arranged on the tank body, the observation window is used for observing the inside of the slag storage chamber, a hydraulic cylinder is arranged on the tank body, a base is arranged below the tank body, the tank body is hinged to the base, the hydraulic cylinder body is fixed on the base, and the top end of the hydraulic oil piston rod is hinged to the tank body.

5. A modular vertical mill and cut hole making apparatus according to claim 1 wherein, The hydraulic pump station comprises two variable plunger pumps, one of which drives the rotation of the public rotation milling power head, and the other of which drives the public rotation of the public rotation milling power head, and the hydraulic pump station is installed on the crawler platform.

6. A modular vertical mill and cut hole making apparatus according to claim 1 wherein, The generator set provides power for the material extraction device.

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