Anchor drill damping and stabilizing system of digging and anchoring integrated machine

Abstract

The invention belongs to the technical field of coal mine underground roadway rapid tunneling, and particularly relates to an anchor drill stabilizing system of a tunneling and anchoring all-in-one machine. Comprising a temporary supporting vibration reduction assembly and a drilling rig anchor drill vibration reduction assembly which are arranged on a machine body, the temporary supporting vibration reduction assembly comprises a supporting body, a lifting assembly and a driving source, the lifting assembly comprises a rod sleeve and a screw, the top end of the rod sleeve is connected with the supporting body through a pin shaft and a knuckle bearing, and the bottom end of the screw is connected with the output end of the driving source; the rod sleeve is in threaded connection with the screw rod, and the rod sleeve and threads of the screw rod form a wedge-shaped inclined plane for self-locking; the drilling rig anchor drill damping assembly comprises a drilling rig, a drilling rig support and a hydro-pneumatic suspension device, the drilling rig is installed on the drilling rig support, and the hydro-pneumatic suspension device is additionally installed between the drilling rig and the drilling rig support. The driving source rotates forwards to drive the rod sleeve to reduce the height of the supporting main body, and rotates backwards to lift, so that the supporting main body is always in contact with the top plate without damaging the top plate, and the vibration of the machine body of the digging and anchoring integrated machine in the digging and anchoring process is reduced.

Description

Technical Field

[0001] The invention belongs to the field of rapid tunneling in underground coal mines, and in particular is an anchor drill vibration reduction and stabilization system of an integrated digging and anchoring machine. Background Art

[0002] The integrated digging and anchoring machine is the core equipment for rapid mining and forming of coal mine tunnels. The structural characteristics of the integrated digging and anchoring machine can realize the simultaneous operation of cutting and supporting. However, the changes in coal rock hardness and changing geological conditions during the cutting process will cause the entire machine body to vibrate violently, making it difficult for the anchor drill on the body to accurately align and quickly drill holes at the predetermined drilling position during the anchoring operation. Therefore, how to achieve fast and accurate anchor drilling support is one of the key issues that urgently need to be solved for rapid tunnel excavation.

[0003] At present, the main way to improve the stability of the anchor drilling system is to increase the stability of the airborne temporary support device, in which the airborne temporary support device can also solve the problem of unstable roof falling during the support process. For example, in the invention patent with patent number CN218509475U, entitled "A kind of airborne temporary support device for an integrated drilling and anchoring machine", the temporary support device is lifted to a certain height by using the lifting cylinder as the power source to temporarily support the roof and create a safe space. However, its height is locked by the connecting rod and pin connected to the cylinder, and the fixed position of the pin is limited by the limited number of pin insertion and extraction holes. There is a problem that the support device cannot fully contact with the roof or damages the roof due to excessive contact, thereby aggravating the vibration of the drilling and anchoring machine body. Summary of the invention

[0004] In order to solve the problems in the prior art that the fixed position of the pin shaft is limited and the vibration cannot be reduced by the rigid fixed connection of the drill frame, the present invention provides a vibration reduction and stabilization system for anchor drilling of an integrated drilling and anchoring machine, comprising a temporary support vibration reduction assembly and a drill frame anchor drilling vibration reduction assembly arranged on a machine body, the temporary support vibration reduction assembly comprising a support body, a lifting assembly and a driving source, the lifting assembly comprising a rod sleeve and a screw rod, the top end of the rod sleeve is connected to the support body through a pin shaft and a joint bearing, the bottom end of the screw rod is connected to the output end of the driving source, the rod sleeve is threadedly connected to the screw rod, and the threads of the rod sleeve and the screw rod form a wedge-shaped inclined surface for self-locking;

[0005] The drill rig anchor drill vibration reduction assembly comprises a drill rig, a drill rig support, and an oil-gas suspension device. The drill rig is installed on the drill rig support and the oil-gas suspension device is installed between the two.

[0006] Optionally, the self-locking structure includes an internal thread of the rod sleeve and an external thread of the screw, the external thread is composed of a plurality of wedge blocks arranged at intervals along the outer surface of the screw, and the internal thread is composed of a plurality of wedge grooves corresponding to the external thread, and the length of the connecting ends of adjacent wedge grooves is less than the length of the connecting ends of adjacent wedge blocks.

[0007] Optionally, the spacing between adjacent wedge blocks is greater than zero.

[0008] Optionally, the oil-gas suspension device includes an outer cylinder, a piston rod and a floating piston. The piston rod and the floating piston are both slidably arranged in the outer cylinder. A one-way valve and a damping hole are arranged on the side wall of the piston rod located in the outer cylinder. The outer wall of the piston rod away from the floating piston and the inner wall of the outer cylinder form a first cavity. The end face of the floating piston close to the piston rod and the inner wall of the piston rod are connected to form a second cavity. A third cavity is formed between the end face of the piston away from the piston rod and the inner wall of the outer cylinder. Hydraulic oil is arranged in the first cavity and the second cavity, and inert gas is arranged in the third cavity.

[0009] Optionally, the side wall of the piston rod includes a first tubular side wall arranged along the movement direction of the piston rod, the first tubular side wall extends outwardly near the end face of the floating piston to form a second annular side wall, the one-way valve and the damping hole are arranged on the second annular side wall, and the outer periphery of the second annular side wall slides against the inner wall of the outer cylinder.

[0010] Optionally, the liquid flow direction of the one-way valve is set along the direction from the second cavity to the first cavity.

[0011] Optionally, a temporary support and vibration reduction assembly is arranged above the fuselage, and a drilling rig support is fixedly arranged on one side of the traveling direction of the fuselage.

[0012] Optionally, the inert gas is nitrogen.

[0013] Beneficial effects of the present invention:

[0014] In the present invention, the rod sleeve is connected to the support body through a pin shaft and a joint bearing, which can adapt to roofs of different angles. The driving source can drive the rod sleeve to lower the height of the support body structure by forward rotation, and can raise it by reverse rotation, thereby realizing "stepless adjustment" of the roof support height, which is better than the current "hydraulic cylinder + support rod" pin shaft height adjustment mode, and can ensure that the temporary support is always in contact with the roof without damaging the roof, and reduce the vibration of the fuselage of the drilling and anchoring machine during the digging and anchoring process, and can realize fast and accurate anchor drilling support. The drill rig passively reduces the influence of the vibration of the fuselage and the drill rig on the drilling stability of the drill rig during the digging and anchoring process of the drilling and anchoring machine through the oil and gas suspension device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the temporary support device of the present invention;

[0016] Figure 2 It is the self-locking principle diagram of the screw and the rod sleeve;

[0017] Figure 3 It is a schematic diagram of the connection between the drilling rig, the drilling rig support and the oil and gas suspension device;

[0018] Figure 4It is a structural diagram of the oil-gas suspension device.

[0019] in:

[0020] 1. Support body; 2. Lifting assembly; 201. Rod sleeve; 2011. Wedge groove; 202. Screw; 2021. Wedge block; 3. Driving source; 4. Drilling rack; 5. Drilling rack support; 6. Oil and gas suspension device; 601. Outer cylinder; 602. Piston rod; 603. Piston; 604. First cavity; 605. Second cavity; 606. Third cavity; 607. One-way valve; 608. Damping hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1 , Figure 2 As shown, the present invention provides an anchor drilling vibration reduction and stabilization system for an integrated drilling and anchoring machine, including a temporary support vibration reduction assembly and a drill frame anchor drilling vibration reduction assembly. The temporary support vibration reduction assembly is arranged above the fuselage. The temporary support vibration reduction assembly includes a support body 1, a lifting assembly 2 and a driving source 3. The lifting assembly 2 includes a rod sleeve 201 and a screw 202. The top of the rod sleeve 201 is connected to the support body 1 through a pin and a joint bearing, and the bottom of the screw 202 is connected to the output end of the driving source 3. The rod sleeve 201 is threadedly connected to the screw 202, and the threads of the rod sleeve 201 and the screw 202 form a wedge-shaped inclined surface for self-locking. The drill frame anchor drilling vibration reduction assembly includes a drill frame 4, a drill frame support 5, and an oil-gas suspension device 6. The drill frame 4 is installed on the drill frame support 5 and an oil-gas suspension device 6 is installed between the two. The drill frame support 5 is fixedly arranged on one side of the moving direction of the fuselage.

[0023] Specifically, the rod sleeve 201 is connected to the support body 1 structure through a pin and a joint bearing, which can adapt to roofs at different angles. The driving source 3 can drive the rod sleeve 201 to lower the height of the temporary support body 1 structure by forward rotation, and can raise the support body by reverse rotation, thereby achieving "stepless adjustment" of the roof support height, which is better than the current "hydraulic cylinder + support rod" pin adjustment height mode, and can ensure that the support body 1 is always in contact with the roof without damaging the roof, thereby reducing the vibration of the machine body during the digging and anchoring process.

[0024] On the basis of the above embodiment, in an optional implementation, the self-locking structure includes an internal thread of the rod sleeve 201 and an external thread of the screw rod 202, the external thread is composed of a plurality of wedge blocks 2021 arranged at intervals along the outer surface of the screw rod 202, the internal thread is composed of a plurality of wedge grooves 2011 corresponding to the external thread, the length of the connecting end of adjacent wedge grooves 2011 is less than the length of the connecting end of adjacent wedge blocks 2021. The interval between adjacent wedge blocks 2021 is greater than 0.

[0025] Specifically, the angle between the wedge block 2021 and the radial direction of the screw rod 202 is 60°, and the screw rod 202 can achieve self-locking locking of the external thread of the screw rod 202 and the internal thread of the rod sleeve 201 through the 60° wedge-shaped inclined surface, ensuring that the temporary support will not be lowered after being lifted to the corresponding height.

[0026] After the mining and anchoring machine enters the tunnel, it starts cutting and supporting. At this time, the driving source 3 in the temporary support vibration reduction assembly is started. When the driving source 3 rotates forward, it drives the screw 202 to rotate in the rod sleeve 201, so that the rod sleeve 201 drives the support body 1 to lower. When the driving source 3 rotates reversely, the rod sleeve 201 drives the support body 1 to rise. Since the external thread of the screw 202 is composed of a plurality of wedge blocks 2021, and the internal thread of the rod sleeve 201 is composed of a plurality of wedge grooves 2011, the wedge blocks 2021 and the wedge grooves 2011 form a self-locking structure, which ensures that the support body 1 will not be lowered after being lifted to the corresponding height, and after reaching the specified height, it only contacts with the top plate but does not damage the top plate, thereby reducing the body vibration of the mining and anchoring machine during the mining and anchoring process.

[0027] Based on the above embodiment, in an optional implementation manner, as Figure 4 As shown, the oil-gas suspension device 6 includes an outer cylinder 601, a piston rod 602 and a floating piston 603. The piston rod 602 and the floating piston 603 are both slidably arranged in the outer cylinder 601. A one-way valve 607 and a damping hole 608 are arranged on the side wall of the piston rod 602 located in the outer cylinder 601. The liquid flow direction of the one-way valve is arranged along the direction from the second cavity to the first cavity. The outer wall of the piston rod 602 away from the floating piston 603 and the inner wall of the outer cylinder 601 form a first cavity 604. The end surface of the floating piston 603 close to the piston rod 603 is connected to the inner wall of the piston rod 602 to form a second cavity 605. The end surface of the piston 603 away from the piston rod 603 and the inner wall of the piston rod 602 form a third cavity 606. Hydraulic oil is arranged in the first cavity 604 and the second cavity 605, and inert gas is arranged in the third cavity 606.

[0028] The outer cylinder 601 is made of stainless steel or other hard and non-damageable materials, and the inert gas is nitrogen.

[0029] Based on the above embodiments, in an optional implementation, the side wall of the piston rod 602 includes a first tubular side wall arranged along the movement direction of the piston rod 602, and the first tubular side wall extends outward from the end surface of the floating piston 603 to form a second annular side wall, and the one-way valve 607 and the damping hole 608 are arranged on the second annular side wall, and the outer periphery of the second annular side wall slides against the inner wall of the outer cylinder 601.

[0030] Specifically, when the drilling rig 4 is anchoring, the vibration of the drilling rig 4 is transmitted to the oil-gas suspension device 6, causing the piston rod 602 and the outer cylinder 601 to reciprocate. When the drilling rig 4 rebounds due to drilling resistance, the load of the oil-gas suspension device 6 increases, and the piston rod 602 is pressed into the outer cylinder 601, causing the volume of the second cavity 605 to decrease and the volume of the first cavity 604 to increase. Since the volume of the oil in the second cavity 605 decreases more than the volume of the first cavity 604 increases, a part of the hydraulic oil flows from the second cavity 605 into the first cavity 604 through the damping hole 608 and the one-way valve 607, and the pressure of the other part pushes the floating piston 603 to compress the nitrogen in the third cavity 606. When the pressure in the third cavity 606 is balanced with the external load, the oil-gas suspension device 6 stops moving. When the oil-gas suspension is impacted by the drilling rig 4, the one-way valve 607 and the damping hole 608 are opened at the same time, the hydraulic oil flows through a large area with a small flow resistance, and the impact load is mainly carried by the compressed nitrogen in the third cavity 606. Due to the high compressibility of the gas, it can well absorb the impact and buffer the effect.

[0031] When the drilling rig 4 rebounds due to drilling resistance and starts the recovery vibration process due to inertia, the piston rod 602 will extend from the outer cylinder 601, the volume of the second cavity 605 increases, and the volume of the first cavity 604 decreases. Since the increased volume of the second cavity 605 is greater than the decreased volume of the first cavity 604, the hydraulic oil flows from the first cavity 604 to the second cavity 605 through the damping hole 608. At the same time, the third cavity 606 pushes the floating piston 603 to move downward, and the volume of the third cavity 606 increases. When the pressure of the third cavity 606 is the same as the external load, the piston rod 602 stops moving. During the extension stroke of the piston rod 602, since only the damping is used as the channel for the flow of hydraulic oil, the flow area is small, the flow rate is fast, and the damping is large, which can effectively attenuate the vibration of the drilling rig 4.

Claims

1. An anchor drill vibration reduction and stabilization system for an integrated digging and anchoring machine, comprising a temporary support vibration reduction component and a drill frame anchor drill vibration reduction component arranged on a machine body, characterized in that: The temporary support vibration reduction assembly comprises a support body (1), a lifting assembly (2) and a driving source (3); the lifting assembly (2) comprises a rod sleeve (201) and a screw rod (202); the top end of the rod sleeve (201) is connected to the support body (1) via a pin and a joint bearing; the bottom end of the screw rod (202) is connected to the output end of the driving source (3); the rod sleeve (201) and the screw rod (202) are threadedly connected; the threads of the rod sleeve (201) and the screw rod (202) form a wedge-shaped inclined surface for self-locking; The drilling frame anchor drill vibration reduction assembly comprises a drilling frame (4), a drilling frame support (5), and an oil-gas suspension device (6); the drilling frame (4) is installed on the drilling frame support (5), and the oil-gas suspension device (6) is installed between the two.

2. The anchor drill vibration reduction and stabilization system of the anchor drilling machine according to claim 1, characterized in that: The self-locking structure comprises an internal thread of a rod sleeve (201) and an external thread of a screw rod (202); the external thread is composed of a plurality of wedge blocks (2021) arranged at intervals along the outer surface of the screw rod (202); the internal thread is composed of a plurality of wedge grooves (2011) corresponding to the external thread; the length of the connecting ends of adjacent wedge grooves (2011) is less than the length of the connecting ends of adjacent wedge blocks (2021).

3. The anchor drill vibration reduction and stabilization system of the anchor drilling machine according to claim 2, characterized in that: The interval between adjacent wedge blocks (2021) is greater than 0.

4. The anchor drill vibration reduction and stabilization system of the anchor drilling machine according to claim 1, characterized in that: The oil-gas suspension device (6) comprises an outer cylinder (601), a piston rod (602) and a floating piston (603). The piston rod (602) and the floating piston (603) are both slidably arranged in the outer cylinder (601). A one-way valve (607) and a damping hole (608) are arranged on the side wall of the piston rod (602) located in the outer cylinder (601). The piston rod (602) is away from the outer wall of the floating piston (603) and the outer cylinder (601). 1) forms a first cavity (604), an end surface of the floating piston (603) close to the piston rod (603) is connected to the inner wall of the piston rod (602) to form a second cavity (605), and a third cavity (606) is formed between an end surface of the piston (603) away from the piston rod (603) and the inner wall of the outer cylinder (601), hydraulic oil is set in the first cavity (604) and the second cavity (605), and inert gas is set in the third cavity (606).

5. The anchor drill vibration reduction and stabilization system of the anchor drilling machine according to claim 4, characterized in that: The side wall of the piston rod (602) includes a first cylindrical side wall arranged along the movement direction of the piston rod (602), and the first cylindrical side wall extends outwardly near the end surface of the floating piston (603) to form a second annular side wall. The one-way valve (607) and the damping hole (608) are arranged on the second annular side wall, and the outer periphery of the second annular side wall slides against the inner wall of the outer cylinder (601).

6. The anchor drill vibration reduction and stabilization system of the anchor drilling machine according to claim 5, characterized in that: The liquid flow direction of the one-way valve is set along the direction from the second cavity to the first cavity.

7. The anchor drill vibration reduction and stabilization system of the anchor drilling machine according to claim 1, characterized in that: The temporary support vibration reduction assembly is arranged above the fuselage, and the drilling rig support (5) is fixedly arranged on one side of the moving direction of the fuselage.

8. The anchor drill vibration reduction and stabilization system of the anchor drilling machine according to claim 1, characterized in that: The inert gas is nitrogen.

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