Cantilever type heading machine carrying biomass foam driver to assist high-frequency projectile and use method of cantilever type heading machine

Abstract

The invention relates to the technical field of coal and rock mining roadway tunneling machinery, and discloses a cantilever type tunneling machine carrying a biomass foam driver to assist a high-frequency projectile and a using method of the cantilever type tunneling machine. The cantilever type heading machine comprises a cantilever type heading machine body, a bullet acceleration gun barrel, a bullet filling mechanism, a rotating oil cylinder, a rotating wheel transmission mechanism, a plurality of high-energy gas generation mechanisms, a biomass foam conveying mechanism, a gas pressurization mechanism and an electric excitation mechanism. A projectile impact auxiliary rock breaking system is additionally arranged on the basis of a traditional cantilever type heading machine to carry out auxiliary rock breaking, advanced presplitting can be completed before the cantilever type heading machine works, the integrity and strength of front rock are reduced before a heading machine cutterhead works, the cutting, mining and heading efficiency when hard rock is encountered in the mining and heading process is greatly improved, and the cutting, mining and heading efficiency is greatly improved. The abrasion problem of the cutter head of the heading machine is greatly reduced, and the replacement time and cost of the cutter head are saved to a great extent.

Description

Technical Field

[0001] The present invention relates to the field of coal and rock mining tunnel boring machinery, and in particular to a cantilevered tunnel boring machine equipped with a biomass foam driver and assisted high-frequency projectiles, and a method for using the same. Background Art

[0002] As a key piece of equipment for coal mine tunneling, the operating efficiency of cantilevered roadheaders directly affects the economic benefits of mining. Currently, in the mining of hard rock formations with high confining pressure, traditional cantilevered roadheaders face significant technical bottlenecks: first, the intense friction and impact effect generated by the contact interface between the cutter and the hard rock leads to abnormal tool wear and frequent replacement; second, due to the mechanical rock breaking mechanism, there is a dual contradiction between excessive cutting energy consumption and insufficient effective rock breaking rate, resulting in a significant reduction in the effective operating rate of the equipment; third, the equipment is forced to increase its power configuration to cope with hard rock conditions, resulting in an imbalance in the proportion of energy consumption costs in mining costs. Such problems are particularly prominent in typical mining areas in western my country and have become a common technical problem that restricts efficient mining.

[0003] At present, there are three limitations in the improvement plan of hard rock tunneling technology: First, although the solution of strengthening the cutting tooth material can extend the service life of the tool, it is accompanied by an exponential increase in manufacturing costs; second, although the optimization of the cutting head structure can improve the rock breaking effect, it comes at the cost of a decrease in the dynamic stability of the equipment; third, although the high-pressure water jet auxiliary technology can reduce the cutting resistance, its pressure control system is not stable enough and has the inherent defect of excessive consumption of water resources. The traditional blasting pre-splitting method is difficult to adapt to the needs of modern mining due to safety management and operational efficiency limitations. The existing technology system has not yet overcome the core contradiction of matching mechanical energy with rock crushing energy efficiency. There is an urgent need to develop a new non-blasting, low-energy collaborative rock breaking method.

[0004] Currently, no effective solutions have been proposed for the problems in related technologies. Summary of the Invention

[0005] In response to the problems in the related art, the present invention proposes a cantilevered roadheader equipped with a biomass foam driver assisted by high-frequency projectiles and a method of using the same to overcome the above-mentioned technical problems existing in the existing related art.

[0006] To this end, the specific technical solutions adopted in the present invention are as follows: According to one aspect of the present invention, a cantilevered tunnel boring machine equipped with a biomass foam driver-assisted high-frequency projectile is provided, comprising: a cantilevered tunnel boring machine body, a cutting system being provided at the front end of the cantilevered tunnel boring machine body; a bullet accelerating gun barrel, arranged above the cantilevered tunnel boring machine body and cooperating with the cutting system; a bullet loading mechanism, arranged at one end of the top of the bullet accelerating gun barrel and cooperating therewith; a rotating oil cylinder, arranged around the outside of one end of the bullet accelerating gun barrel, to drive the bullet accelerating gun barrel to rotate at any angle; a rotary wheel transmission mechanism, arranged at one end of the bullet accelerating gun barrel; and a plurality of high-energy gas generators. The invention relates to a biomass foam conveying mechanism, which is arranged inside the rotary transmission mechanism and cooperates with the bullet acceleration barrel to generate high-energy gas to drive the bullet in the bullet acceleration barrel to be ejected; the biomass foam conveying mechanism is arranged at one end of the high-energy gas generating mechanism and is connected thereto to convey biomass foam material into the high-energy gas generating mechanism; the gas boosting mechanism is arranged at one end of the high-energy gas generating mechanism and is connected thereto to increase the pressure in the high-energy gas generating mechanism; the electric excitation mechanism is arranged at the top of the biomass foam conveying mechanism and cooperates with the high-energy gas generating mechanism to serve as an ignition device of the high-energy gas generating mechanism.

[0007] Furthermore, in order to achieve the acceleration effect on the bullet, the bullet acceleration barrel includes a barrel body, the end of the barrel body is connected to the high-energy gas generating mechanism through a ball valve to achieve the directional rotation of the barrel body; a sealing ring is provided on the ball valve to prevent the high-energy gas from overflowing, and a magazine interface that cooperates with the bullet loading mechanism is opened at the top of the barrel body near the ball valve.

[0008] Furthermore, in order to achieve the loading effect of bullets, the bullet loading mechanism includes a magazine shell installed in the magazine interface, and a bullet outlet is opened on one side of the bottom of the magazine shell and in the direction of the opening of the barrel body; a plurality of bullets are arranged inside the magazine shell, and the tail of the bullet is equipped with a bullet holder with the same diameter as the barrel body to carry high-pressure gas to push the bullet to move; a loading spring is provided at the inner top of the magazine shell, and the bottom end of the loading spring contacts the bullet at the top to push the bullet into the barrel body.

[0009] Furthermore, in order to be able to drive the bullet to accelerate the gun barrel to rotate at any angle, the rotating cylinder includes a cylinder shell that is sleeved on the outside of the end of the gun barrel body. The inner wall of the cylinder shell is provided with a plurality of balancing cylinders, and the plurality of balancing cylinders are arranged around the outside of the end of the gun barrel body, so as to realize the bullet accelerating the gun barrel to rotate at any angle through hydraulic control and cooperation with the ball valve at the end of the gun barrel body.

[0010] Furthermore, in order to drive several high-energy gas generating mechanisms to rotate and achieve the continuous shooting effect of bullets, the rotary transmission mechanism includes a rotary body installed on one side of the cylinder housing, and several electric excitation wire docking sealing structures and high-pressure air pipe docking sealing structures are arranged on the outer side of the circumference of one end of the rotary body away from the cylinder housing; a rotating shaft is arranged in the middle of the rotary body to drive the rotary body to rotate, and several cylinders are evenly arranged on the outer side of the circumference of the rotating shaft, and the ends of the several cylinders are connected to the rotary body through rotating guide rails; an electric excitation wire interface and an air inlet are opened through one side of the cylinder, and the electric excitation wire interface and the air inlet correspond to the electric excitation wire docking sealing structure and the high-pressure air pipe docking sealing structure respectively.

[0011] Furthermore, in order to generate high-energy gas to drive the bullet to be ejected quickly, the high-energy gas generating mechanism includes a high-pressure gas generating cylinder installed inside the cylinder body by a thread, and the high-pressure gas generating cylinder and the cylinder body are sealed to form an ignition chamber, and an electric excitation plate is provided in the ignition chamber; a common pressure-resistant tube is provided at one end of the high-pressure gas generating cylinder close to the cylinder body, and one end of the common pressure-resistant tube is respectively connected to a pressure sensor and a first one-way valve through a three-way connection, and the other end of the common pressure-resistant tube is respectively connected to the biomass foam conveying mechanism and the gas boosting mechanism through an air inlet and a high-pressure gas pipe docking sealing structure in turn; an active chamber is provided at the end of the high-pressure gas generating cylinder away from the cylinder body, and an oil port connected to the active chamber is opened at the top of the high-pressure gas generating cylinder, and the oil port is connected to the pneumatic ball valve and the oil pressure pump through an external pressure-resistant oil circuit; a hydraulic sealing structure is provided inside the active chamber, and a ball valve interface matching the ball valve is provided at one end of the hydraulic sealing structure.

[0012] Furthermore, in order to be able to transport biomass foam raw materials to the high-energy gas generating mechanism, the biomass foam conveying mechanism includes a biomass foam storage box installed on the top of the cantilever tunneling machine body, and a foam conveying pipe is provided on one side of the biomass foam storage box. A second one-way valve is provided at the end of the foam conveying pipe, and the end of the foam conveying pipe is respectively connected to the common pressure-resistant pipe and the gas boosting mechanism through a tee.

[0013] Furthermore, in order to achieve a boosting effect, the gas boosting mechanism includes a high-pressure air booster pump installed on the top of the cantilevered tunneling machine body. A pressure-resistant air pipe is provided on one side of the high-pressure air booster pump, and a third one-way valve is provided at the end of the pressure-resistant air pipe. The ends of the pressure-resistant air pipe are respectively connected to the common pressure-resistant pipe and the foam delivery pipe.

[0014] Furthermore, in order to serve as an ignition device for a high-energy gas generating mechanism, the electric excitation mechanism includes an electric excitation chassis installed on the top of the biomass foam storage box, an electric excitation wire is provided on one side of the electric excitation chassis, and the other end of the electric excitation wire passes through the electric excitation wire docking sealing structure and the electric excitation wire interface in sequence and is connected to the electric excitation plate.

[0015] According to another aspect of the present invention, a method for using a cantilever roadheader equipped with a biomass foam driver-assisted high-frequency projectile is provided, the method comprising the following steps: S1. Control the cantilever roadheader to move to the target position of the rock face to be blasted, adjust the cantilever position so that the bullet acceleration gun barrel is aligned with the hard rock position of the working face to be mined, and correct the bullet acceleration gun barrel by controlling the operation of the rotary cylinder so that the bullet acceleration gun barrel is aligned with the rock position to be broken; S2. Control the rotation of the rotating shaft so that one of the high-energy gas generating mechanisms moves to the position of the tunnel boring machine and is connected to the bullet acceleration barrel through the ball valve interface. The tail end is connected to the electric excitation mechanism, the biomass foam conveying mechanism, and the gas pressurizing mechanism respectively through the electric excitation line docking seal structure, the high-pressure gas pipe docking seal structure, and the common pressure-resistant pipe; S3, opening the first one-way valve and the second one-way valve, delivering the biomass foam to the connected ignition chamber through the biomass foam storage tank and the foam delivery pipe, and closing the first one-way valve and the second one-way valve after the ignition chamber is filled with biomass foam; S4. Applying oil pressure to the hydraulic blocking structure through an external oil pump and oil port causes the hydraulic blocking structure to move forward and form a closed space in the ignition chamber, and releasing pressure by starting the ball valve; S5. Assemble the magazine shell filled with bullets to the magazine interface of the bullet acceleration barrel, open the first one-way valve and the third one-way valve, control the high-pressure air booster pump to inject a predetermined initial pressure into the ignition chamber of the high-pressure gas generating tube, and close the first one-way valve, the third one-way valve and the high-pressure air booster pump after the gas injection is completed; S6, controlling the electric excitation chassis to operate so that the electric excitation wire controls the electric excitation chip in the ignition chamber to ignite the biomass foam, and controlling the electric excitation chassis and the electric excitation chip to stop operating after the biomass foam starts to burn; S7. When the pressure signal received by the external pneumatic ball valve reaches a predetermined pressure, the oil pressure is released through the oil port and the pneumatic ball valve, causing the high-energy gas to be rapidly released from the pressure relief port, and pushing the bullet in the barrel body to pass through the bullet outlet and accelerate in the barrel body until it is ejected from the barrel body and hits the hard rock at the working face to be mined, completing the first round of projectile impact-assisted rock breaking; S8. Repeat steps S1-S7 to perform several projectile impact-assisted rock breaking operations until the preset projectile impact-assisted rock breaking requirements are met.

[0016] The beneficial effects of the present invention are: 1) The present invention adds a projectile impact auxiliary rock breaking system to the traditional cantilever roadheader to carry out auxiliary rock breaking. It can complete advance pre-splitting before the cantilever roadheader works, and reduce the integrity and strength of the rock in front before the roadheader cutterhead works. This greatly improves the cutting and mining efficiency when encountering hard rock during the mining and excavation process, greatly reduces the wear problem of the roadheader cutterhead, and greatly saves the time and cost of cutterhead replacement.

[0017] 2) The present invention creatively proposes a high-frequency projectile device for assisting cantilevered roadheaders in mining, which is equipped with biomass foam material to generate high-energy gas to propel bullets into the rock mass, thereby achieving advanced pre-cracking and auxiliary rock crushing. This device solves the current problems of low cutting speed, severe cutterhead wear, and high energy consumption of roadheaders when encountering high confining pressure and hard rock in the mining process. The device has a safe and convenient construction process, simple operation, and a high degree of automation. It can be retrofitted onto existing cantilevered roadheaders. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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 these drawings without paying any creative work.

[0019] Figure 1 is a schematic structural diagram of a cantilevered roadheader equipped with a biomass foam driver-assisted high-frequency projectile according to an embodiment of the present invention; Figure 2 2. It is a schematic structural diagram of a neutron bullet acceleration barrel of a cantilevered roadheader equipped with a biomass foam driver to assist high-frequency projectiles according to an embodiment of the present invention; Figure 3 2. It is a schematic structural diagram of a neutron bullet loading mechanism for a cantilever tunnel boring machine equipped with a biomass foam driver-assisted high-frequency projectile according to an embodiment of the present invention; Figure 4 is a cross-sectional diagram of a bullet loading mechanism for a cantilevered roadheader equipped with a biomass foam driver-assisted high-frequency projectile according to an embodiment of the present invention; Figure 5 2. It is a schematic structural diagram of a rotating cylinder in a cantilever roadheader equipped with a biomass foam driver and assisted high-frequency projectiles according to an embodiment of the present invention; Figure 6 is a schematic cross-sectional view of a rotary cylinder in a cantilever roadheader equipped with a biomass foam driver assisted high-frequency projectile according to an embodiment of the present invention; Figure 72. It is a schematic diagram of the internal structure of a rotary wheel transmission mechanism of a cantilever roadheader equipped with a biomass foam driver-assisted high-frequency projectile according to an embodiment of the present invention; Figure 8 is a right side view of a rotary wheel transmission mechanism of a cantilever roadheader equipped with a biomass foam driver-assisted high-frequency projectile according to an embodiment of the present invention; Figure 9 This is a left view of a rotary wheel transmission mechanism of a cantilever roadheader equipped with a biomass foam driver-assisted high-frequency projectile according to an embodiment of the present invention; Figure 10 The present invention is a schematic structural diagram of a high-energy gas generating mechanism in a cantilever-type roadheader equipped with a biomass foam driver and assisted high-frequency projectiles according to an embodiment of the present invention.

[0020] In the picture: 1. Cantilevered tunneling machine body; 2. Cutting system; 3. Bullet acceleration barrel; 301. Barrel body; 302. Ball valve; 303. Sealing ring; 304. Magazine interface; 4. Bullet loading mechanism; 401. Magazine shell; 402. Bullet outlet; 403. Bullet; 404. Loading spring; 5. Rotating cylinder; 501. Cylinder housing; 502. Balancing cylinder; 6. Rotating wheel transmission mechanism; 601. Rotating wheel housing; 602. Electric excitation line docking seal structure; 603. High-pressure gas pipe docking seal structure; 604. Rotating shaft; 605. Cylinder body; 606. Rotating guide rail; 607. Electric excitation line interface; 608. Air inlet; 7. High-energy gas generating mechanism; 701. High-pressure gas generating cylinder; 702. Ignition chamber; 703. Electric excitation plate; 704. Common pressure-resistant tube; 705. Pressure sensor; 706. First one-way valve; 707. Movable chamber; 708. Oil port; 709. Hydraulic sealing structure; 7091. Fixed cylinder; 7092. Movable cylinder; 7093. Convex sealing block; 710. Ball valve interface; 8. Biomass foam storage box; 9. Foam delivery pipe; 10. Second one-way valve; 11. High-pressure air booster pump; 12. Pressure-resistant air pipe; 13. Third one-way valve; 14. Electric excitation chassis; 15. Electric excitation line. DETAILED DESCRIPTION

[0021] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention. They are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0022] According to an embodiment of the present invention, a cantilever roadheader equipped with a biomass foam driver-assisted high-frequency projectile and a method of using the same are provided.

[0023] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figures 1-10 According to one aspect of the present invention, a cantilever roadheader equipped with a biomass foam driver and assisted high-frequency projectiles is provided. The cantilever roadheader is used to fire projectiles into the rock mass before cutting hard coal or other rock mass, thereby achieving the purpose of pre-cracked coal and rock mass. After the coal and rock mass are pre-cracked, the roadheader cutterhead begins cutting, including: A cantilevered tunnel boring machine body 1 is provided with a cutting system 2 at the front end thereof. Specifically, the cantilevered tunnel boring machine can be any conventional cantilevered tunnel boring machine and mainly includes all the systems and components of a conventional cantilevered tunnel boring machine, such as a cutting system, a crawler-type travel power system, a loading and transporting system, a hydraulic and electronic control system, and a dust removal and safety assurance system. The cutting system can be modified to adapt the cutting tool according to the operating environment. The bullet acceleration barrel 3 is arranged above the cantilevered tunneling machine body 1 and cooperates with the cutting system 2; The bullet loading mechanism 4 is provided at one end of the top of the bullet accelerating barrel 3 and cooperates therewith; The rotating oil cylinder 5 is arranged around the outer side of one end of the bullet accelerating barrel 3 to drive the bullet accelerating barrel 3 to rotate at any angle; The rotary transmission mechanism 6 is provided at one end of the bullet accelerating barrel 3; A plurality of high-energy gas generating mechanisms 7 are disposed inside the rotary transmission mechanism 6 and cooperate with the bullet accelerating barrel 3 to generate high-energy gas to drive the bullet accelerating barrel 3 to eject the bullet; The biomass foam conveying mechanism is provided at one end of the high-energy gas generating mechanism 7 and is in communication therewith, so as to convey the biomass foam material into the high-energy gas generating mechanism 7; a gas pressurizing mechanism, disposed at one end of the high-energy gas generating mechanism 7 and in communication therewith, to increase the pressure in the high-energy gas generating mechanism 7; The electric excitation mechanism is arranged on the top of the biomass foam conveying mechanism and cooperates with the high-energy gas generating mechanism 7 to serve as an ignition device of the high-energy gas generating mechanism 7.

[0024] In specific applications, the cantilever tunnel boring machine of this embodiment adopts the EBZ260 cantilever tunnel boring machine produced by XCMG Group. It is modified on the basis of this cantilever tunnel boring machine, and a projectile impact assisted rock breaking system is installed on the top of the tunnel boring machine. Before the cutter head of the cantilever tunnel boring machine cuts the hard rock on the working face, the projectile impact assisted rock breaking system is used to launch ultra-high-speed bullets to hit the hard coal rock to be mined. The tunnel boring machine cutter head cuts the coal rock that has been pre-cracked by the impact, and coal rock mining or tunnel excavation construction is carried out.

[0025] With the help of the above technical solution, the present invention adds a projectile impact auxiliary rock breaking system on the basis of the traditional cantilever tunnel boring machine to carry out auxiliary rock breaking, which can complete advance pre-splitting before the cantilever tunnel boring machine works, and reduce the integrity and strength of the rock in front before the tunnel boring machine cutter head works, greatly improving the cutting and mining excavation efficiency when encountering hard rock during the mining and excavation process, greatly reducing the wear problem of the tunnel boring machine cutter head, and saving the cutter head replacement time and cost to a great extent.

[0026] In one embodiment, the bullet acceleration barrel 3 includes a barrel body 301, the end of which is connected to the high-energy gas generating mechanism 7 via a ball valve 302 to enable the barrel body 301 to rotate in one direction; a sealing ring 303 is provided on the ball valve 302 to prevent the high-energy gas from overflowing. In specific applications, the connection between the ball valve and the ball valve interface is equivalent to the connection between a convex spherical surface and a concave spherical surface, and a wear-resistant sealing ring is provided in the middle for sealing. A magazine interface 304 that cooperates with the bullet loading mechanism 4 is provided at the top of the barrel body 301 near the ball valve 302.

[0027] In specific applications, the bullet acceleration barrel 3 is a long special steel pipe (i.e., the barrel body 301) with a diameter slightly larger than the diameter of the bullet. The diameter of the barrel body 301 is 100 mm, the diameter of the bullet is 98 mm, and the length of the barrel body 301 is 3000 mm, which is shorter than the length of the tunnel boring machine cantilever in the retracted state. The end of the barrel is connected to the high-energy gas generating mechanism 7 through a ball valve 302. The barrel can be rotated in the direction of the barrel by rotating the ball valve 302. A wear-resistant and high-temperature resistant sealing ring 303 is installed on the ball valve 302 (the sealing ring is a customized polytetrafluoroethylene sealing ring with a wire diameter of 6 mm) to prevent high-energy gas from overflowing. A magazine interface 304 for equipping a magazine is left at the front end of the ball valve 302.

[0028] In one embodiment, the bullet loading mechanism 4 includes a magazine shell 401 installed in the magazine interface 304, and a bullet outlet 402 is opened on one side of the bottom of the magazine shell 401 in the direction of the opening of the barrel body 301; a plurality of bullets 403 are arranged inside the magazine shell 401, and the tail of the bullet 403 is equipped with a bullet holder with the same diameter as the barrel body 301 to carry high-pressure gas to push the bullet to move; a loading spring 404 is provided at the top inner part of the magazine shell 401, and the bottom end of the loading spring 404 contacts the bullet 403 at the top to push the bullet 403 into the barrel body 301.

[0029] In specific applications, the bullet loading mechanism 4 includes a magazine shell 401, bullets 403, a bullet outlet 402, and a loading spring 404. The magazine shell 401 is assembled on the gun barrel and connected by a mechanical snap-fit connection. The magazine can be replaced with magazines of different shapes, lengths, and bullet changing methods according to the number and type of bullets required. The bullet 403 is a solid homogeneous projectile. The projectile material, bullet shape, and bullet rod length can be adjusted according to the strength of the pre-cracked rock mass and the size of the cut rock mass. The projectile material includes but is not limited to steel fiber concrete, granite, high-strength steel, tungsten alloy steel, etc. The bullet shape includes but is not limited to pointed, flat, round, etc. The tail of the bullet is usually equipped with a bullet with the same diameter as the gun barrel. The support is used to carry high-pressure gas to push the bullet to move; preferably, in this embodiment, a rectangular magazine shell that can hold up to 13 bullets is selected, and the bullets are made of tungsten alloy steel and are pointed bullets; the bullet 403 is pushed into the barrel by the loading spring 404 in the magazine shell 401, and only one bullet can enter the barrel at a time; the bullet outlet 402 is open in the direction of the barrel, and the opening size is larger than the diameter of the bullet, wherein the rear end of the bullet is opened to receive the released high-pressure gas, and the high-pressure gas pushes the bullet forward and flies out quickly through the bullet outlet.

[0030] In one embodiment, the rotating cylinder 5 includes a cylinder housing 501 that is sleeved on the outside of the end of the barrel body 301. The inner wall of the cylinder housing 501 is provided with a plurality of balancing cylinders 502 (in this embodiment, the number of balancing cylinders 502 is four), and the plurality of balancing cylinders 502 are arranged around the outside of the end of the barrel body 301 to realize the arbitrary angle rotation of the bullet accelerating barrel 3 through hydraulic control and cooperation with the ball valve 302 at the end of the barrel body 301.

[0031] In this embodiment, the extended section of the rotating oil cylinder 5 is in contact with the barrel body. Through hydraulic control, when all four rotating oil cylinders are tightened, the extended length of the rotating oil cylinder is straight, and the barrel body will be straightened and cannot rotate. When the rotating oil cylinder is loosened, the barrel body is not pushed by the cylinder and can rotate. By carefully adjusting the four surfaces of the rotating oil cylinder (different forces in different directions of front, back, left and right cause the barrel body to turn), the barrel body can be oriented in any direction.

[0032] In one embodiment, the wheel transmission mechanism 6 includes a wheel housing 601 installed on one side of the cylinder housing 501. In specific applications, the wheel housing 601 can be mechanically connected or welded to the bracket through an external frame, and the wheel housing can rotate on the external frame. The bracket is welded to the top of the cantilever tunneling machine. Several electric excitation wire docking sealing structures 602 and high-pressure air pipe docking sealing structures 603 are set on the outer side of the circumference of one end of the wheel housing 601 away from the cylinder housing 501. In this embodiment, the electric excitation wire docking sealing structure is a structure of a perforated screw + polytetrafluoroethylene gasket. The electric excitation wire passes through the gasket and the screw, and the screw squeezes the gasket to realize the sealing structure; the high-pressure air pipe docking sealing structure is a high-pressure one-way valve, which can only take in air but not Air outlet; a rotating shaft 604 is provided in the middle of the wheel bin body 601 to drive the wheel bin body 601 to rotate. In this embodiment, the rotating shaft can be driven by electric drive or oil drive, sharing the oil or electricity on the cantilever tunneling machine, and driving the rotating shaft to rotate by driving the chain and gear to rotate. A number of cylinders 605 are evenly provided on the outer side of the circumference of the rotating shaft 604, and the ends of the several cylinders 605 are connected to the wheel bin body 601 through a rotating guide rail 606; an electric excitation line interface 607 and an air inlet 608 are opened on one side of the cylinder 605, and the electric excitation line interface 607 and the air inlet 608 respectively correspond to the electric excitation line docking sealing structure 602 and the high-pressure air pipe docking sealing structure 603.

[0033] In specific applications, the high-energy gas generating mechanism 7 is integrated into the rotary transmission mechanism 6, which mainly includes a rotary chamber 601, an electric excitation line docking sealing structure 602, a high-pressure gas pipe docking sealing structure 603, a rotating shaft 604, a rotating guide rail 606, an air inlet and feed port 608 and an electric excitation line interface 607. The high-energy gas generating mechanism 7 is installed in multiple cylinders 605 of the rotor chamber. The rotor chamber 601 is made of stainless steel. Each rotor chamber 601 can carry 6 high-energy gas sounding tubes. The rotating shaft 604 drives the entire rotor chamber 601 to rotate. When one of the high-energy gas generating mechanisms 7 runs to a position closest to the tunnel boring machine, the front of the high-energy gas generating mechanism 7 is connected to the barrel body 301 through the ball valve interface 710, and the tail end is connected to the electric excitation mechanism, biomass foam conveying mechanism and gas boosting mechanism through the hydroelectric excitation line docking sealing structure 602 and the high-pressure gas pipe docking sealing structure 603. After the docking is completed, a complete step of projectile impact begins. After a projectile task is completed, the rotating shaft 604 rotates again to the next position. When the high-energy gas generating mechanism 7 runs to the designated position, the next projectile task begins.

[0034] In one embodiment, the high-energy gas generating mechanism 7 includes a high-pressure gas generating cylinder 701 installed inside the cylinder 605 by means of a thread, and the high-pressure gas generating cylinder 701 and the cylinder 605 are sealed to form an ignition chamber 702, and an electric excitation plate 703 is provided in the ignition chamber 702; a common pressure-resistant pipe 704 is provided at one end of the high-pressure gas generating cylinder 701 close to the cylinder 605, and one end of the common pressure-resistant pipe 704 is respectively connected to a pressure sensor 705 and a first one-way valve 706 through a three-way connection, and the other end of the common pressure-resistant pipe 704 is connected in turn through an air inlet and outlet. The material port 608 and the high-pressure gas pipe docking sealing structure 603 are respectively connected to the biomass foam conveying mechanism and the gas boosting mechanism; an active chamber 707 is provided at the end of the high-pressure gas generating cylinder 701 away from the cylinder body 605, and an oil port 708 connected to the active chamber 707 is provided at the top of the high-pressure gas generating cylinder 701, and the oil port 708 is connected to the pneumatic ball valve and the oil pressure pump through an external pressure-resistant oil circuit; a hydraulic sealing structure 709 is provided inside the active chamber 707, and a ball valve interface 710 that cooperates with the ball valve 302 is provided at one end of the hydraulic sealing structure 709.

[0035] In specific applications, the high-energy gas generating mechanism 7 primarily comprises a hydraulic sealing structure 709, an oil port 708, a high-pressure gas generating cylinder 701, an electro-excitation chip 703, a pressure sensor 705, a first one-way valve 706, a ball valve interface 710, and a shared pressure-resistant pipe 704. The high-pressure gas generating cylinder 701 is constructed of pressure-resistant and high-temperature resistant metal, designed to withstand a pressure of 300 MPa and a temperature of 2000°C, and has a cylinder capacity of 15 L. At the rear end of the high-pressure gas generating cylinder 701 is a shared pressure-resistant pipe 704 through which the biomass foam and high-pressure gas enter the cylinder. At this inlet, a pressure-resistant tee is connected to a pressure-resistant one-way valve (i.e., the first one-way valve 706). The pressure sensor 705 is used to monitor pressure changes within the cylinder in real time. The oil port 708 is connected to the pneumatic ball valve and the oil pressure pump through a pressure-resistant oil circuit. The pneumatic ball valve can set the automatic pressure relief pressure through the control panel and automatically read the actual measured data of the pressure sensor. When the set pressure is reached in the high-pressure gas generating cylinder 701, it will automatically relieve the pressure (the pressure relief pressure is set to 120MPa in this embodiment), and the pressure relief port of the hydraulic sealing structure will release to the gun barrel.

[0036] The hydraulic blocking structure 709 includes a fixed cylinder 7091 arranged inside the movable chamber 707, one end of the fixed cylinder 7091 is provided with a ball valve interface 710, the other end of the fixed cylinder 7091 is sleeved with a movable cylinder 7092, and an oil chamber that cooperates with the oil port 708 is formed between the movable cylinder 7092, the fixed cylinder 7091 and the inner wall of the movable chamber 707, one end of the movable cylinder 7092 is fixedly connected to a convex sealing block 7093 through a connecting rod, and one end of the convex sealing block 7093 cooperates with the ignition chamber 702; when hydraulic oil is injected into the oil port 708, the movable cylinder 7092 will be driven to move to the right, The convex sealing block 7093 is driven to move to the right by the connecting rod until it contacts the pressure relief port of the ignition chamber 702 and seals the ignition chamber 702. When the pressure in the ignition chamber 702 reaches the predetermined pressure threshold, the hydraulic oil is withdrawn from the oil port 708. At this time, the high-pressure gas in the ignition chamber 702 drives the convex sealing block 7093 to move to the left, thereby driving the movable cylinder 7092 to move to the left until it contacts the fixed cylinder 7091. At this time, the high-pressure gas enters the movable chamber 707 and moves through the through hole on the movable cylinder 7092 and the channel inside the fixed cylinder 7091 in turn to the barrel body to push the bullet out.

[0037] In one embodiment, the biomass foam conveying mechanism includes a biomass foam storage box 8 installed on the top of the cantilever tunneling machine body 1, and a foam conveying pipe 9 is provided on one side of the biomass foam storage box 8. A second one-way valve 10 is provided at the end of the foam conveying pipe 9, and the end of the foam conveying pipe 9 is respectively connected to the common pressure-resistant pipe 704 and the gas boosting mechanism through a tee.

[0038] In specific applications, the biomass foam conveying mechanism mainly includes a second one-way valve 10, a foam conveying pipe 9, a biomass foam storage box 8, etc. The biomass foam storage box 8 is used to manufacture and store biomass foam materials, and provide power to convey foam into the foam conveying pipe. In this embodiment, the foam storage and conveying box is designed to have a volume of 80L; the foam conveying pipe 9 is a pressure-resistant hose, and the second one-way valve 10 is a pressure-resistant valve; the biomass foam material can be ignited by an electric coil, and the biomass foam material burns rapidly and releases heat after being ignited, causing the temperature in the high-energy gas generating cylinder to rise rapidly and the pressure in the cylinder to increase sharply.

[0039] In one embodiment, the gas boosting mechanism includes a high-pressure air booster pump 11 installed on the top of the cantilever tunneling machine body 1, and a pressure-resistant air pipe 12 is provided on one side of the high-pressure air booster pump 11. A third one-way valve 13 is provided at the end of the pressure-resistant air pipe 12, and the ends of the pressure-resistant air pipe 12 are respectively connected to the common pressure-resistant pipe 704 and the foam delivery pipe 9.

[0040] In specific applications, the gas boosting mechanism mainly includes a third one-way valve 13, a pressure-resistant air pipe 12, a high-pressure air booster pump 11, etc. In this embodiment, the high-pressure air booster pump 11 is of the Haskel AGD-300 model, with a maximum output pressure of more than 40 MPa and a flow rate of more than 3200 NL / min at the rated pressure; the pressure-resistant air pipe 12 has excellent pressure resistance and explosion-proof capabilities, and the third one-way valve 13 is a pressure-resistant valve.

[0041] In one embodiment, the electric excitation mechanism includes an electric excitation box 14 installed on the top of the biomass foam storage box 8. An electric excitation wire 15 is provided on one side of the electric excitation box 14, and the other end of the electric excitation wire 15 passes through the electric excitation wire docking sealing structure 602 and the electric excitation wire interface 607 in sequence and is connected to the electric excitation piece 703. In specific applications, the electric excitation box 14 is connected to the electric excitation piece 703 through the electric excitation wire 15, serving as an ignition device for the high-energy gas generating mechanism.

[0042] According to another aspect of the present invention, a method for using a cantilever roadheader equipped with a biomass foam driver-assisted high-frequency projectile is provided, the method comprising the following steps: S1. Control the cantilevered roadheader to move to the target position on the face of the rock mass to be blasted, adjust the cantilever position so that the bullet accelerating gun barrel is roughly aligned with the hard rock position of the working face to be mined, and correct the bullet accelerating gun barrel by controlling the operation of the rotary cylinder so that the bullet accelerating gun barrel is accurately aligned with the rock position to be broken; S2. Control the rotation of the rotating shaft so that one of the high-energy gas generating mechanisms moves to the position of the tunnel boring machine and is connected to the bullet acceleration barrel through the ball valve interface. The tail end is connected to the electric excitation mechanism, the biomass foam conveying mechanism, and the gas pressurizing mechanism respectively through the electric excitation line docking seal structure, the high-pressure gas pipe docking seal structure, and the common pressure-resistant pipe; S3, opening the first one-way valve and the second one-way valve, delivering the biomass foam to the connected ignition chamber through the biomass foam storage tank and the foam delivery pipe, and closing the first one-way valve and the second one-way valve after the ignition chamber is filled with biomass foam; S4. Applying oil pressure to the hydraulic blocking structure through an external oil pump and oil port causes the hydraulic blocking structure to move forward and form a closed space in the ignition chamber, and releasing pressure by starting the ball valve; S5. Assemble the loaded magazine shell onto the magazine interface of the bullet accelerating barrel (the bottom bullet enters the barrel first), open the first and third one-way valves, control the high-pressure air booster pump to inject a predetermined initial pressure (40 MPa) into the ignition chamber of the high-pressure gas generator, and close the first and third one-way valves and the high-pressure air booster pump after the gas injection is completed. S6. Control the electric excitation chassis to operate so that the electric excitation wire controls the electric excitation chip in the ignition chamber to ignite the biomass foam (in this embodiment, the electric excitation chip is a special electric spark ignition head that can be reused, and short-term combustion will not affect the electric excitation chip). After the biomass foam starts to burn, control the electric excitation chassis and the electric excitation chip to stop working; S7. When the pressure signal received by the external pneumatic ball valve reaches a predetermined pressure, the oil pressure is released through the oil port and the pneumatic ball valve, causing the high-energy gas to be rapidly released from the pressure relief port, and pushing the bullet in the barrel body to pass through the bullet outlet and accelerate in the barrel body until it is ejected from the barrel body and hits the hard rock at the working face to be mined, completing the first round of projectile impact-assisted rock breaking; S8. Repeat steps S1-S7 to perform several projectile impact-assisted rock breaking operations until the preset projectile impact-assisted rock breaking requirements are met.

[0043] To sum up, with the help of the above-mentioned technical scheme of the present invention, the present invention adds a projectile impact auxiliary rock breaking system on the basis of the traditional cantilever tunnel boring machine to carry out auxiliary rock breaking, which can complete advance pre-splitting before the cantilever tunnel boring machine works, and reduce the integrity and strength of the rock in front before the tunnel boring machine cutter head works, greatly improving the cutting and mining efficiency when encountering hard rock during the mining and tunneling process, greatly reducing the wear problem of the tunnel boring machine cutter head, and saving the cutter head replacement time and cost to a great extent.

[0044] In addition, the present invention creatively proposes a high-frequency projectile device equipped with biomass foam material to generate high-energy gas to propel bullets into the rock mass, thereby achieving advanced pre-cracking and auxiliary rock crushing for auxiliary cantilever tunneling machines. This device solves the current problems of low cutting speed, severe cutterhead wear, and high energy consumption of tunneling machines when encountering high confining pressure and hard rock mass during mining. The device has a safe and convenient construction process, simple operation, and a high degree of automation, and can be modified on the basis of existing cantilever tunneling machines.

[0045] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cantilevered roadheader equipped with a biomass foam driver assisted by a high-frequency projectile, characterized in that: include: A cantilevered tunneling machine body (1), wherein a cutting system (2) is provided at the front end of the cantilevered tunneling machine body (1); A bullet acceleration barrel (3) is arranged above the cantilevered tunneling machine body (1) and cooperates with the cutting system (2); A bullet loading mechanism (4) is provided at one end of the top of the bullet accelerating barrel (3) and cooperates therewith; A rotating oil cylinder (5) is arranged around the outer side of one end of the bullet accelerating barrel (3) to drive the bullet accelerating barrel (3) to rotate at any angle; A rotary transmission mechanism (6) is provided at one end of the bullet accelerating barrel (3); A plurality of high-energy gas generating mechanisms (7) are arranged inside the rotary transmission mechanism (6) and cooperate with the bullet accelerating barrel (3) to generate high-energy gas to drive the bullet accelerating barrel (3) to eject the bullet; A biomass foam conveying mechanism is provided at one end of the high-energy gas generating mechanism (7) and is in communication therewith, so as to convey the biomass foam material into the high-energy gas generating mechanism (7); a gas pressurizing mechanism, disposed at one end of the high-energy gas generating mechanism (7) and in communication therewith, to increase the pressure in the high-energy gas generating mechanism (7); The electric excitation mechanism is arranged on the top of the biomass foam conveying mechanism and cooperates with the high-energy gas generating mechanism (7) to serve as an ignition device for the high-energy gas generating mechanism (7).

2. A cantilevered roadheader equipped with a biomass foam driver and assisted high-frequency projectiles according to claim 1, characterized in that: The bullet accelerating barrel (3) comprises a barrel body (301), the end of which is connected to the high-energy gas generating mechanism (7) via a ball valve (302) to enable the barrel body (301) to rotate in a certain direction; A sealing ring (303) is provided on the ball valve (302) to prevent high-energy gas from escaping. A magazine interface (304) is provided on the top of one end of the barrel body (301) close to the ball valve (302) to cooperate with the bullet loading mechanism (4).

3. A cantilevered roadheader equipped with a biomass foam driver and assisted high-frequency projectiles according to claim 2, characterized in that: The bullet loading mechanism (4) comprises a magazine shell (401) installed in the magazine interface (304), and a bullet outlet (402) is provided on one side of the bottom of the magazine shell (401) in a direction toward the opening of the gun barrel body (301); A plurality of bullets (403) are arranged inside the magazine shell (401), and a cartridge case having the same diameter as the barrel (301) is installed at the tail of the bullet (403) to carry high-pressure gas to propel the bullet to move; A loading spring (404) is provided at the inner top of the magazine shell (401), and the bottom end of the loading spring (404) contacts the bullet (403) at the top end to push the bullet (403) into the barrel body (301).

4. A cantilevered roadheader equipped with a biomass foam driver and assisted high-frequency projectiles according to claim 3, characterized in that: The rotating oil cylinder (5) comprises an oil cylinder housing (501) sleeved on the outside of the end of the gun barrel body (301), and a plurality of balancing oil cylinders (502) are provided on the inner wall of the oil cylinder housing (501), and the plurality of balancing oil cylinders (502) are arranged around the outside of the end of the gun barrel body (301), so as to realize the arbitrary angle rotation of the bullet accelerating gun barrel (3) by hydraulic control in conjunction with the ball valve (302) at the end of the gun barrel body (301).

5. A cantilevered roadheader equipped with a biomass foam driver and assisted high-frequency projectiles according to claim 4, characterized in that: The wheel transmission mechanism (6) comprises a wheel housing (601) mounted on one side of the oil cylinder housing (501), and a plurality of electric excitation wire docking sealing structures (602) and high-pressure gas pipe docking sealing structures (603) are provided on the outer side of the circumference of one end of the wheel housing (601) away from the oil cylinder housing (501); A rotating shaft (604) is provided in the middle of the rotating wheel bin body (601) to drive the rotating wheel bin body (601) to rotate, and a plurality of cylinders (605) are evenly provided on the outer side of the circumference of the rotating shaft (604), and the ends of the plurality of cylinders (605) are connected to the rotating wheel bin body (601) via rotating guide rails (606); One side of the cylinder (605) is provided with an electric excitation line interface (607) and an air inlet (608), and the electric excitation line interface (607) and the air inlet (608) respectively correspond to the electric excitation line docking sealing structure (602) and the high-pressure air pipe docking sealing structure (603).

6. A cantilevered roadheader equipped with a biomass foam driver and assisted high-frequency projectiles according to claim 5, characterized in that: The high-energy gas generating mechanism (7) comprises a high-pressure gas generating cylinder (701) threadably mounted inside the cylinder (605), and an ignition chamber (702) is formed by sealing between the high-pressure gas generating cylinder (701) and the cylinder (605), wherein an electric excitation plate (703) is provided in the ignition chamber (702); A common pressure-resistant pipe (704) is provided at one end of the high-pressure gas generating cylinder (701) close to the cylinder body (605), and one end of the common pressure-resistant pipe (704) is respectively connected to a pressure sensor (705) and a first one-way valve (706) via a three-way connection, and the other end of the common pressure-resistant pipe (704) is respectively connected to the biomass foam conveying mechanism and the gas pressurizing mechanism via the air inlet and feed port (608) and the high-pressure gas pipe docking sealing structure (603); An active cavity (707) is provided at one end of the high-pressure gas generating cylinder (701) away from the cylinder body (605), and an oil port (708) communicating with the active cavity (707) is provided at the top of the high-pressure gas generating cylinder (701), and the oil port (708) is connected to a pneumatic ball valve and an oil pressure pump via an external pressure-resistant oil circuit; A hydraulic blocking structure (709) is provided inside the movable cavity (707), and a ball valve interface (710) that matches the ball valve (302) is provided at one end of the hydraulic blocking structure (709).

7. A cantilevered roadheader equipped with a biomass foam driver and assisted high-frequency projectiles according to claim 6, characterized in that: The biomass foam conveying mechanism comprises a biomass foam storage box (8) installed on the top of the cantilevered tunneling machine body (1); a foam conveying pipe (9) is provided on one side of the biomass foam storage box (8); a second one-way valve (10) is provided at the end of the foam conveying pipe (9); and the end of the foam conveying pipe (9) is respectively connected to the common pressure-resistant pipe (704) and the gas boosting mechanism through a three-way connection.

8. A cantilevered roadheader equipped with a biomass foam driver and assisted high-frequency projectiles according to claim 7, characterized in that: The gas boosting mechanism comprises a high-pressure air boosting pump (11) installed on the top of the cantilevered tunneling machine body (1), a pressure-resistant air pipe (12) is provided on one side of the high-pressure air boosting pump (11), a third one-way valve (13) is provided at the end of the pressure-resistant air pipe (12), and the ends of the pressure-resistant air pipe (12) are respectively connected to the common pressure-resistant pipe (704) and the foam delivery pipe (9).

9. A cantilevered roadheader equipped with a biomass foam driver and assisted high-frequency projectiles according to claim 8, characterized in that: The electric excitation mechanism comprises an electric excitation case (14) mounted on the top of the biomass foam storage box (8), an electric excitation wire (15) is provided on one side of the electric excitation case (14), and the other end of the electric excitation wire (15) passes through the electric excitation wire docking sealing structure (602) and the electric excitation wire interface (607) in sequence and is connected to the electric excitation plate (703).

10. A method for using a cantilevered roadheader equipped with a biomass foam driver and assisted high-frequency projectiles as claimed in claim 9, characterized in that: The method comprises the following steps: S1. Control the cantilever roadheader to move to the target position of the rock face to be blasted, adjust the cantilever position so that the bullet acceleration gun barrel is aligned with the hard rock position of the working face to be mined, and correct the bullet acceleration gun barrel by controlling the operation of the rotary cylinder so that the bullet acceleration gun barrel is aligned with the rock position to be broken; S2. Control the rotation of the rotating shaft so that one of the high-energy gas generating mechanisms moves to the position of the tunnel boring machine and is connected to the bullet acceleration barrel through the ball valve interface. The tail end is connected to the electric excitation mechanism, the biomass foam conveying mechanism, and the gas pressurizing mechanism respectively through the electric excitation line docking seal structure, the high-pressure gas pipe docking seal structure, and the common pressure-resistant pipe; S3, opening the first one-way valve and the second one-way valve, delivering the biomass foam to the connected ignition chamber through the biomass foam storage tank and the foam delivery pipe, and closing the first one-way valve and the second one-way valve after the ignition chamber is filled with biomass foam; S4. Applying oil pressure to the hydraulic blocking structure through an external oil pump and oil port causes the hydraulic blocking structure to move forward and form a closed space in the ignition chamber, and releasing pressure by starting the ball valve; S5. Assemble the magazine shell filled with bullets to the magazine interface of the bullet acceleration barrel, open the first one-way valve and the third one-way valve, control the high-pressure air booster pump to inject a predetermined initial pressure into the ignition chamber of the high-pressure gas generating tube, and close the first one-way valve, the third one-way valve and the high-pressure air booster pump after the gas injection is completed; S6, controlling the electric excitation chassis to operate so that the electric excitation wire controls the electric excitation chip in the ignition chamber to ignite the biomass foam, and controlling the electric excitation chassis and the electric excitation chip to stop operating after the biomass foam starts to burn; S7. When the pressure signal received by the external pneumatic ball valve reaches a predetermined pressure, the oil pressure is released through the oil port and the pneumatic ball valve, causing the high-energy gas to be rapidly released from the pressure relief port, and pushing the bullet in the barrel body to pass through the bullet outlet and accelerate in the barrel body until it is ejected from the barrel body and hits the hard rock at the working face to be mined, completing the first round of projectile impact-assisted rock breaking; S8. Repeat steps S1-S7 to perform several projectile impact-assisted rock breaking operations until the preset projectile impact-assisted rock breaking requirements are met.

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