A tunneling drill with rock pressure balancing function

Abstract

The present invention discloses a tunneling drill with rock pressure balancing function, which belongs to the technical field of tunneling drill. It includes a control cabin, a mobile base, a support frame, a telescopic arm and a tunneling assembly. The present invention converts the extrusion force of the bent tunneling drill rod into an electrical signal through a sensing assembly. The deformation degree of the tunneling drill rod can be judged according to the strength of the electrical signal, and the strength of the rock can be analyzed. By adjusting the propulsion force of the hydraulic device on the tunneling drill rod, the force at both ends of the tunneling drill rod is reduced, and the tunneling drill rod is gradually restored from the bent state, so as to achieve the purpose of tunneling drilling rock pressure balance adjustment. The protective pressure rod is driven to slide and retract by a sliding rod, and several groups of protective wheels on the protective pressure rod are tightly attached to the tunneling drill rod, generating dense gripping force on the surface of the tunneling drill rod to prevent the tunneling drill rod from further deformation; the reset assembly and the reset motor are used to drive the protective assembly and the rotating assembly to automatically reset, so as to achieve the purpose of dynamic cyclic adjustment of rock pressure balance of the tunneling drill.

Description

Technical Field

[0001] The invention relates to the technical field of tunneling drills, in particular to a tunneling drill with a rock pressure balancing function. Background Art

[0002] Boring rigs are key equipment in tunnel and underground engineering. They are widely used in tunneling, mining and other fields, significantly improving construction efficiency and reducing labor intensity. In recent years, domestic boring rig technology has made significant progress and will continue to develop in the direction of intelligence, efficiency and environmental protection in the future. However, there are still some problems that bother R&D personnel.

[0003] During the drilling process, the drill rod of the tunnel boring rig will be subjected to the thrust of the hydraulic propulsion device at one end and the reverse thrust of the rock at the other end. The hydraulic thrust and the reverse thrust of the rock squeeze the drill rod in the middle at the same time. When the two forces exceed the load limit of the drill rod, the drill rod will bend and deform at the point with the maximum bending moment, or even break. When the two forces are too small, the performance of the drill rod will not be brought into play and the drilling efficiency will be too low. Due to the large number of uncertain factors in the drilling process, it is difficult to keep the pressure at both ends of the drill rod within a balanced and reasonable range. Therefore, the rock pressure balance problem has always been a difficult problem that needs to be overcome urgently for tunnel boring rigs. Summary of the invention

[0004] The object of the present invention is to provide a tunneling drill with a rock pressure balancing function to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a tunneling drill with rock pressure balancing function, comprising a control cabin, a mobile base is installed at the bottom of the control cabin, a telescopic arm is installed at one end of the control cabin, a tunneling assembly is slidably installed on the telescopic arm, and a support frame is installed on the mobile base; the tunneling assembly includes a connecting slide rail, the connecting slide rail is slidably installed on the telescopic arm, a driving motor and a hydraulic device are installed on the connecting slide rail, a tunneling drill rod is connected to the output shaft of the hydraulic device, the tunneling drill rod is slidably connected to the connecting slide rail, the driving motor is transmission-connected to the tunneling drill rod, a sliding base is slidably installed on the connecting slide rail, and the connecting slide rail An adjusting cylinder is installed on the top, and the output shaft of the adjusting cylinder is connected to the sliding base. A rock pressure balancer is installed on the sliding base. One end of the excavation drill rod passes through the rock pressure balancer and is installed with a drill bit. The rock pressure balancer includes a rock pressure housing, a sensing component is installed in the rock pressure housing, and transmission components are symmetrically installed at both ends of the sensing component. A rotating component and a protective component are symmetrically installed in the rock pressure housing. The rotating component is embedded with the transmission component, and the rotating component is connected with the protective component. A reset component is symmetrically installed in the rock pressure housing, and the reset component is slidably connected with the rotating component. A reset motor is installed in the rock pressure housing, and the reset motor is connected to the rotating component through a belt. A control system is provided in the control cabin, and the control system is used to control the entire excavation drilling rig.

[0006] The staff controls the operation of the entire tunneling drill in the control cabin, drives the tunneling drill to the work site by manipulating the mobile chassis, and then adjusts the telescopic arm so that the telescopic arm drives the tunneling assembly to move to the tunneling face. After it is in place, unfold the support frame, turn on the drive motor and hydraulic device, so that the tunneling drill rod rotates and extends forward, and the tunneling drill rod drives the drill bit to carry out tunneling. The adjusting cylinder drives the rock pressure balancer to slide on the connecting slide rail through the sliding base, so that the rock pressure balancer is always located in the center of the undrilled part of the tunneling drill rod to prevent the center of the undrilled part of the tunneling drill rod from bending or breaking due to excessive bending moment.

[0007] The sensing assembly includes a sensing tube and a pressure sensor. The sensing tube is installed in the rock pressure housing through a connector. Several roller connecting rods are slidably installed on the sensing tube. A sensing roller is rotatably installed at one end of the roller connecting rod. A sensing plate is installed at the other end of the roller connecting rod. A sensing spring is installed between the sensing plate and the sensing roller. A sensing contact is installed on the sensing plate. The pressure sensor is installed in the rock pressure housing. A pressure spring is installed between the sensing contact and the rock pressure housing. The pressure sensor is located in the middle of the pressure spring. A transmission assembly is symmetrically installed on the sensing tube. The sensing roller will rotate with the rotation of the excavation drill rod to avoid affecting the rotation speed of the excavation drill rod and preventing the excavation drill rod from being scratched.

[0008] The sensing assembly also includes a sensing slide bar, which is slidably connected to the sensing plate, and sensing sliders are symmetrically installed at both ends of the sensing slide bar, and a sliding hook is installed on the sensing slider, which is slidably connected to the transmission assembly, and the sensing slider is slidably connected to the rock pressure housing. The sensing slider is installed on a slide groove in the rock pressure housing, and the sensing slider can only slide horizontally along the slide groove.

[0009] When the rock texture is uneven and drilling reaches a high hardness area of ​​rock, the thrust of the hydraulic device and the reverse thrust of the rock exceed the yield strength of the drilling rod, causing the drilling rod to bend. At this time, the drilling part is not easily bent due to the gripping force generated by the surrounding rocks, while the undrilled part has no wrapping around the drilling rod, so the center of the undrilled part becomes the point with the maximum bending moment and produces bending deformation, causing the drilling to enter a state of rock pressure imbalance.

[0010] When the drilling rod on the drilling rig bends and deforms due to unbalanced rock pressure, the bent drilling rod will continue to rotate eccentrically, and the bent part of the drilling rod will come into contact with a circle of sensing rollers around it as it rotates. When one of the sensing rollers comes into contact with it, the bent part of the drilling rod drives the roller connecting rod to slide through the sensing roller, and the roller connecting rod overcomes the pulling force of the sensing spring to drive the sensing plate to slide upward, and the sliding of the sensing plate drives the sensing sliding rod to move. Since the sensing slider can only slide horizontally in the sliding groove of the rock pressure shell, the sensing sliding rod can only drive the sensing slider to slide horizontally, and the corresponding two sensing sliders slide closer and drive the sliding hook to slide closer; at the same time, the sliding sensing slider The induction plate will drive the sensing contact to slide, causing the sensing contact to squeeze the pressure sensor. The pressure sensor generates current after being squeezed. The greater the bending degree of the tunneling drill rod, the greater the displacement of the sensing contact, the greater the squeezing force of the sensing contact on the pressure sensor, and the greater the induced current generated. The pressure sensor converts the current into an electrical signal and transmits it to the control system. The control system determines the deformation degree of the tunneling drill rod according to the strength of the electrical signal, analyzes the strength of the rock, and gradually reduces the propulsion force of the hydraulic device on the tunneling drill rod, thereby reducing the force at both ends of the tunneling drill rod, allowing the tunneling drill rod to gradually recover from the bent state, thereby achieving the purpose of balancing and regulating the rock pressure during tunneling drilling.

[0011] The transmission assembly includes a transmission ring and a transmission connecting rod. A transmission slide rod is slidably installed on the transmission connecting rod. The transmission slide rod is connected to the transmission ring. The transmission connecting rod is installed on the induction cylinder. A sliding spring is installed between the transmission connecting rod and the transmission ring. A plurality of clamping blocks are installed on the transmission ring. The clamping blocks are embedded with the rotating assembly.

[0012] The sliding hook drives the transmission ring to shrink and move closer. The transmission ring overcomes the elastic force of the sliding spring and slides, driving all the clamping blocks on the transmission ring to disengage from the engagement with the limit block. After losing the constraint of the clamping block, all the sliding springs change from a compressed state to an extended state, causing the slider connecting rod to slide down and drive all the transmission blocks to fit with the surface of the excavation drill rod. Under the action of friction, the excavation drill rod drives the transmission blocks to rotate together. The rotating assembly includes a main rotating ring, on which a number of slider connecting rods are slidably installed. A transmission block is installed at one end of the slider connecting rod. A slider spring is installed between the transmission block and the main rotating ring. A limit block is installed on the transmission block. The limit block is engaged with the clamping block, and the slider connecting rod is slidably connected with the reset assembly. The surface of the transmission block is made of a material with a high friction coefficient, so that it generates a large friction force after being in contact with the surface of the excavation drill rod.

[0013] The rotating assembly also includes a rotating ring and a rotating slide rod. The rotating slide rod is slidably installed on the main rotating ring. A rotating block is installed at one end of the rotating slide rod. A rotating spring is installed between the rotating block and the main rotating ring. A plurality of grooves are provided on the rotating ring. The rotating ring is engaged with the rotating block through the grooves, and the rotating ring is connected to the protective assembly.

[0014] The transmission block drives the main rotating ring to rotate through the slider connecting rod, and the main rotating ring drives the rotating ring to rotate through the rotating clamping block. The rotating ring rotates and drives the adjusting ring to rotate. The adjusting ring drives the sliding rod to rotate. The sliding rod is constrained by the sliding ring and can only slide in a straight line, so that the sliding rod converts the rotation into sliding and contracting along the sliding groove of the sliding ring. The sliding rod drives the protective pressure rod to slide and contract, and the protective pressure rod drives the protective wheel to contract and fit tightly against the bent excavation drill rod. Several groups of protective wheels are close to the excavation drill rod, which generates dense gripping force on the surface of the excavation drill rod, preventing the excavation drill rod from further deformation and preventing the rock pressure balance adjustment from being performed synchronously. When the adjusting ring is rotated into place and cannot rotate further, the rotational force on the main rotating ring will squeeze the rotating block, causing the rotating block to overcome the elastic force of the rotating spring and slide. When the rotating block is completely rotated into the groove on the main rotating ring, the main rotating ring loses its constraint and rotates on its own. Afterwards, the rotating block extends out again and engages with the groove on the rotating ring. This cycle prevents the rotational force of the main rotating ring from being too large and causing deformation of the rotating assembly. At the same time, the protective wheel will rotate with the rotation of the drilling rod to avoid affecting the rotation speed of the drilling rod and prevent the drilling rod from being scratched.

[0015] The reset assembly includes a reset disk, which is movably connected to the rock pressure housing, a bidirectional reset cylinder is installed between the reset disks, a reset connecting rod is rotatably installed on the reset disk, a reset ring is rotatably installed between the reset connecting rods, and the reset ring is slidably connected to the slider connecting rod. The reset disk is slidably and rotatably connected to the rock pressure housing.

[0016] When the rock pressure balance adjustment is completed, the control system controls the output shafts at both ends of the two-way reset cylinder to extend, and the output shafts drive the reset disks on both sides to slide away, and the reset disks drive the reset connecting rod to pull the reset ring upward, and the reset ring drives the slider connecting rod to slide upward, and the slider connecting rod drives the transmission block to move upward to break away from the contact with the excavation rotating rod, and the transmission block drives the limit block to rise so that the height of the slot on the limit block is aligned with the card block, and the control system starts the reset motor, and the reset motor drives the adjusting ring to rotate in the opposite direction through the belt to reset the sliding rod, thereby resetting the protective assembly as a whole, and also making the card block and the limit block fit together, and then the two-way reset cylinder is closed to achieve the overall reset of the rock pressure balancer.

[0017] The protection component includes a sliding ring and a sliding rod. The sliding ring is fixedly installed in the rock pressure housing. An adjusting ring is rotatably installed on the sliding ring close to the sensing component. The adjusting ring is connected to the rotating ring. The adjusting ring is connected to the reset motor through a belt. The sliding rod is slidably connected to the sliding ring. The sliding rod is slidably connected to the adjusting ring. A protection pressure rod is installed on the sliding rod. A protection connecting rod is slidably installed on the protection pressure rod. A protection cylinder is rotatably installed on the protection connecting rod. A protection wheel is installed on the protection cylinder. A protection spring is installed between the protection cylinder and the protection pressure rod.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention converts the extrusion force of the bent tunneling drill rod into an electrical signal through a sensing component, and the degree of deformation of the tunneling drill rod can be judged according to the strength of the electrical signal, and the strength of the rock can be analyzed. By adjusting the propulsion force of the hydraulic device on the tunneling drill rod, the force at both ends of the tunneling drill rod is reduced, and the tunneling drill rod is gradually restored from the bent state, thereby achieving the purpose of adjusting the rock pressure balance during tunneling drilling.

[0019] The sliding rod is used to drive the protective pressure rod to slide and close. Several groups of protective wheels on the protective pressure rod are close to the excavation drill rod, generating dense gripping force on the surface of the excavation drill rod, preventing the excavation drill rod from further deformation and preventing irreversible damage to the excavation drill rod when the rock pressure balance is adjusted synchronously; at the same time, the protective wheel will rotate with the rotation of the excavation drill rod to avoid affecting the rotation speed of the excavation drill rod and preventing the excavation drill rod from being scratched. When the adjustment ring rotates to the right position and cannot rotate further, the rotation force of the main rotating ring drives the rotating slider to shrink, causing the main rotating ring to rotate, preventing the rotation force of the main rotating ring from being too large and causing the rotating component to deform.

[0020] The induction roller will rotate with the rotation of the drilling rod to avoid affecting the rotation speed of the drilling rod and preventing the drilling rod from being scratched. The reset assembly and reset motor are used to drive the protection assembly and the rotating assembly to automatically reset. Every time the drilling rod is abnormal, the rock pressure balance can be adjusted to achieve the purpose of dynamic cycle adjustment of the rock pressure balance of the drilling rig. As long as one sliding hook slides, it will drive the overall clamping block to slide, so that the transmission block fits the surface of the drilling rod, so that the drilling rod can be used to drive the rotating assembly to rotate, and finally drive the protection assembly to protect the bent drilling rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 is an overall stereogram of the tunneling drilling rig of the present invention;

[0023] Figure 2 is a perspective view of the tunneling assembly of the present invention;

[0024] Figure 3 is a perspective view of a rock pressure balancer of the present invention;

[0025] Figure 4 is a perspective view of the interior of the protective assembly of the present invention;

[0026] Figure 5 is a perspective view of the induction component of the present invention;

[0027] Figure 6is an internal stereogram of a rotating assembly of the present invention;

[0028] Figure 7 The present invention Figure 4 A partial enlarged view of the middle A area;

[0029] Figure 8 The present invention Figure 5 A partial enlarged view of the middle B area;

[0030] Fig. 9 The present invention Figure 5 A partial enlarged view of the middle C area;

[0031] Fig.10 The present invention Figure 6 A partial enlarged view of the D area in the middle;

[0032] In the figure: 1. control cabin; 2. mobile base; 3. support frame; 4. telescopic arm; 5. excavation assembly; 6. rock pressure balancer; 7. excavation drill rod; 8. connecting slide rail; 9. hydraulic device; 10. drive motor; 11. regulating cylinder; 12. sliding base; 61. protection assembly; 62. reset assembly; 63. induction assembly; 64. transmission assembly; 65. rotating assembly; 611. sliding ring; 612. adjusting ring; 613. sliding rod; 614. protection pressure rod; 616. protection wheel; 617. protection cylinder; 618. protection connecting rod; 619. protection spring; 621. reset plate; 622. two-way reset cylinder; 623. reset ring; 62 4. reset connecting rod; 631. induction tube; 632. induction roller; 633. roller connecting rod; 634. induction spring; 635. induction plate; 636. slide hook; 637. induction slider; 638. induction contact; 639. pressure sensor; 6310. pressure spring; 6311. induction slider; 641. transmission ring; 642. transmission slider; 643. transmission connecting rod; 644. sliding spring; 645. clamping block; 651. rotating ring; 652. transmission block; 653. rotating clamping block; 654. rotating slider; 655. rotating spring; 656. limit block; 657. slider connecting rod; 658. slider spring; 659. main rotating ring. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1-Figure 10The present invention provides a technical solution: a tunneling drill with rock pressure balancing function, comprising a control cabin 1, a mobile base 2 is installed at the bottom of the control cabin 1, a telescopic arm 4 is installed at one end of the control cabin 1, a tunneling assembly 5 is slidably installed on the telescopic arm 4, and a support frame 3 is installed on the mobile base 2; the tunneling assembly 5 includes a connecting slide rail 8, the connecting slide rail 8 is slidably installed on the telescopic arm 4, a driving motor 10 and a hydraulic device 9 are installed on the connecting slide rail 8, a tunneling drill rod 7 is connected to the output shaft of the hydraulic device 9, the tunneling drill rod 7 is slidably connected to the connecting slide rail 8, the driving motor 10 is transmission-connected to the tunneling drill rod 7, a sliding base 12 is slidably installed on the connecting slide rail 8, and an adjusting cylinder 11 is installed on the connecting slide rail 8, The output shaft of the regulating cylinder 11 is connected to the sliding base 12, on which a rock pressure balancer 6 is installed, and one end of the excavation drill rod 7 passes through the rock pressure balancer 6 and is installed with a drill bit; the rock pressure balancer 6 includes a rock pressure housing, in which a sensing component 63 is installed, and transmission components 64 are symmetrically installed at both ends of the sensing component 63, and a rotating component 65 and a protective component 61 are symmetrically installed in the rock pressure housing, and the rotating component 65 is engaged with the transmission component 64, and the rotating component 65 is connected to the protective component 61, and a reset component 62 is symmetrically installed in the rock pressure housing, and the reset component 62 is slidably connected with the rotating component 65, and a reset motor is installed in the rock pressure housing, and the reset motor is connected to the rotating component 65 through a belt. A control system is provided in the control cabin 1, and the control system is used to control the entire excavation drilling rig.

[0035] The sensing assembly 63 includes a sensing tube 631 and a pressure sensor 639. The sensing tube 631 is installed in the rock pressure housing through a connecting piece. A plurality of roller connecting rods 633 are slidably installed on the sensing tube 631. A sensing roller 632 is rotatably installed at one end of the roller connecting rod 633. A sensing plate 635 is installed at the other end of the roller connecting rod 633. A sensing spring 634 is installed between the sensing plate 635 and the sensing roller 632. A sensing contact 638 is installed on the sensing plate 635. The pressure sensor 639 is installed in the rock pressure housing. A pressure spring 6310 is installed between the sensing contact 638 and the rock pressure housing. The pressure sensor 639 is located in the middle of the pressure spring 6310. The transmission assembly 64 is symmetrically installed on the sensing tube 631. The sensing roller 632 will rotate with the rotation of the excavation drill rod 7 to avoid affecting the rotation speed of the excavation drill rod 7 and preventing the excavation drill rod 7 from being scratched.

[0036] The sensing assembly 63 further includes a sensing slide bar 6311, which is slidably connected to the sensing plate 635. Sensing sliders 637 are symmetrically installed at both ends of the sensing slide bar 6311. A sliding hook 636 is installed on the sensing slider 637. The sliding hook 636 is slidably connected to the transmission assembly 64. The sensing slider 637 is slidably connected to the rock pressure housing. The sensing slider 637 is installed on a slide groove in the rock pressure housing, and the sensing slider 637 can only slide horizontally along the slide groove.

[0037] When the rock texture is uneven and drilling reaches a high hardness area of ​​the rock, the thrust of the hydraulic device 9 and the reverse thrust of the rock exceed the yield strength of the tunneling drill rod 7, causing the tunneling drill rod 7 to bend. At this time, the tunneling part is not easily bent due to the gripping force generated by the surrounding rocks, while the undrilled part has no wrapping around the tunneling drill rod 7, so the center of the undrilled part becomes the point with the maximum bending moment and produces bending deformation, causing the tunneling drilling to enter a state of rock pressure imbalance.

[0038] The transmission assembly 64 includes a transmission ring 641 and a transmission connecting rod 643, a transmission slide bar 642 is slidably installed on the transmission connecting rod 643, the transmission slide bar 642 is connected to the transmission ring 641, the transmission connecting rod 643 is installed on the induction tube 631, a sliding spring 644 is installed between the transmission connecting rod 643 and the transmission ring 641, and a plurality of clamping blocks 645 are installed on the transmission ring 641, and the clamping blocks 645 are engaged with the rotating assembly 65.

[0039] The rotating assembly 65 includes a main rotating ring 659, on which a plurality of slider connecting rods 657 are slidably mounted, a transmission block 652 is mounted at one end of the slider connecting rod 657, a slider spring 658 is mounted between the transmission block 652 and the main rotating ring 659, a limit block 656 is mounted on the transmission block 652, the limit block 656 is engaged with the clamping block 645, and the slider connecting rod 657 is slidably connected with the reset assembly 62. The surface of the transmission block 652 is made of a material with a high friction coefficient, so that it generates a large friction force when it is in contact with the surface of the excavation drill rod 7.

[0040] The rotating assembly 65 also includes a rotating ring 651 and a rotating slide 654. The rotating slide 654 is slidably installed on the main rotating ring 659. A rotating clamp 653 is installed at one end of the rotating slide 654. A rotating spring 655 is installed between the rotating clamp 653 and the main rotating ring 659. A plurality of grooves are provided on the rotating ring 651. The rotating ring 651 is engaged with the rotating clamp 653 through the grooves, and the rotating ring 651 is connected to the protective assembly 61.

[0041] The protection component 61 includes a sliding ring 611 and a sliding rod 613. The sliding ring 611 is fixedly installed in the rock pressure housing. An adjusting ring 612 is rotatably installed on the sliding ring 611 close to the sensing component 63. The adjusting ring 612 is connected to the rotating ring 651. The adjusting ring 612 is connected to the reset motor through a belt. The sliding rod 613 is slidably connected to the sliding ring 611. The sliding rod 613 is slidably connected to the adjusting ring 612. A protection pressure rod 614 is installed on the sliding rod 613. A protection connecting rod 618 is slidably installed on the protection pressure rod 614. A protection cylinder 617 is rotatably installed on the protection connecting rod 618. A protection wheel 616 is installed on the protection cylinder 617. A protection spring 619 is installed between the protection cylinder 617 and the protection pressure rod 614.

[0042] The reset assembly 62 includes a reset disk 621, which is movably connected to the rock pressure housing, a bidirectional reset cylinder 622 is installed between the reset disks 621, a reset connecting rod 624 is rotatably installed on the reset disk 621, a reset ring 623 is rotatably installed between the reset connecting rods 624, and the reset ring 623 is slidably connected to the slider connecting rod 657. The reset disk 621 is slidably and rotatably connected to the rock pressure housing.

[0043] The working principle of the present invention is as follows: the staff controls the operation of the entire tunneling drill in the control cabin 1, drives the tunneling drill to the working place by manipulating the mobile chassis, and then adjusts the telescopic arm 4 so that the telescopic arm 4 drives the tunneling assembly 5 to move to the tunneling face. After it is in place, the support frame 3 is unfolded, and the drive motor 10 and the hydraulic device 9 are turned on to make the tunneling drill rod 7 rotate and extend forward, and the tunneling drill rod 7 drives the drill bit to perform tunneling. The adjusting cylinder 11 drives the rock pressure balancer 6 to slide on the connecting slide rail 8 through the sliding base 12, so that the rock pressure balancer 6 is always located at the center of the undrilled part of the tunneling drill rod 7, so as to prevent the center of the undrilled part of the tunneling drill rod 7 from bending or breaking due to excessive bending moment.

[0044] When the tunneling drill rod 7 on the tunneling drill rig is bent and deformed due to unbalanced rock pressure, the bent tunneling drill rod 7 will continue to rotate eccentrically, and the bent part of the tunneling drill rod 7 will rotate and come into contact with a circle of sensing rollers 632 around it. When one of the sensing rollers 632 comes into contact with it, the bent part of the tunneling drill rod 7 drives the roller connecting rod 633 to slide through the sensing roller 632, and the roller connecting rod 633 overcomes the pulling force of the sensing spring 634 to drive the sensing plate 635 to slide upward, and the sliding of the sensing plate 635 drives the sensing slide bar 6311 to move. Since the sensing slider 637 can only slide horizontally in the slide groove of the rock pressure shell, the sensing slide bar 6311 can only drive the sensing slider 637 to slide horizontally, and the corresponding two sensing sliders 637 slide together and drive the sliding hook 636 to slide together. At the same time, the sliding induction plate 635 will drive the induction contact 638 to slide, so that the induction contact 638 squeezes the pressure sensor 639. After the pressure sensor 639 is squeezed, an electric current is generated. The greater the bending degree of the tunneling drill rod 7, the greater the displacement of the induction contact 638, the greater the squeezing force of the induction contact 638 on the pressure sensor 639, and the greater the induced current generated. The pressure sensor 639 converts the current into an electrical signal and transmits it to the control system. The control system determines the deformation degree of the tunneling drill rod 7 according to the strength of the electrical signal, analyzes the strength of the rock, and gradually reduces the propulsion force of the hydraulic device 9 on the tunneling drill rod 7, thereby reducing the force at both ends of the tunneling drill rod 7, allowing the tunneling drill rod 7 to gradually recover from the bent state, thereby achieving the purpose of balancing and regulating the rock pressure during tunneling drilling.

[0045] The sliding hook 636 hooks the transmission ring 641 to shrink and move it closer. The transmission ring 641 overcomes the elastic force of the sliding spring 644 and slides, driving all the clamping blocks 645 on the transmission ring 641 to disengage from the engagement with the limit block 656. After losing the constraint of the clamping block 645, all the sliding springs 644 change from a compressed state to an extended state, causing the slider connecting rod 657 to slide down and drive all the transmission blocks 652 to fit with the surface of the drilling rod 7. Under the action of friction, the drilling rod 7 drives the transmission blocks 652 to rotate together.

[0046] The transmission block 652 drives the main rotating ring 659 to rotate through the slider connecting rod 657, and the main rotating ring 659 drives the rotating ring 651 to rotate through the rotating block 653. The rotating ring 651 rotates and drives the adjusting ring 612 to rotate. The adjusting ring 612 rotates and drives the sliding rod 613 to rotate. The sliding rod 613 is constrained by the sliding ring 611 and can only slide in a straight line, so that the sliding rod 613 converts the rotation into sliding and retracting along the sliding groove of the sliding ring 611. The sliding rod 613 drives the protective pressure rod 614 to slide and retract. The protective pressure rod 614 drives the protective wheel 616 to retract and fit tightly against the bent excavation drill rod 7. Several groups of protective wheels 616 are close to the excavation drill rod 7, generating dense gripping force on the surface of the excavation drill rod 7, preventing the excavation drill rod 7 from further deformation and preventing it from being When the rock pressure balance adjustment is performed synchronously, the tunneling drill rod 7 is irreversibly damaged. When the adjustment ring 612 is rotated into place and cannot be rotated further, the rotational force on the main rotating ring 659 will squeeze the rotating block 653, causing the rotating block 653 to overcome the elastic force of the rotating spring 655 and slide. When the rotating block 653 is completely rotated into the groove on the main rotating ring 659, the main rotating ring 659 loses its constraint and rotates on its own. After that, the rotating block 653 extends out again and engages with the groove on the rotating ring 651. This cycle prevents the rotating force of the main rotating ring 659 from being too large and causing deformation of the rotating assembly 65. At the same time, the protective wheel 616 will rotate with the rotation of the tunneling drill rod 7 to avoid affecting the rotation speed of the tunneling drill rod 7 and preventing the tunneling drill rod 7 from being scratched.

[0047] When the rock pressure balance adjustment is completed, the control system controls the output shafts at both ends of the two-way reset cylinder 622 to extend, and the output shafts drive the reset disks 621 on both sides to slide away, and the reset disks 621 drive the reset connecting rod 624 to pull the reset ring 623 upward, and the reset ring 623 drives the slider connecting rod 657 to slide upward, and the slider connecting rod 657 drives the transmission block 652 to move upward to break away from the contact with the excavation rotating rod, and the transmission block 652 drives the limit block 656 to rise, so that the height of the card slot on the limit block 656 is aligned with the card block 645, and the control system starts the reset motor, and the reset motor drives the adjusting ring 612 to rotate in the opposite direction through the belt to reset the sliding rod 613, so that the protective assembly 61 is reset as a whole, and at the same time, the card block 645 is also engaged with the limit block 656, and then the two-way reset cylinder 622 is closed to achieve the overall reset of the rock pressure balancer 6.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tunneling drill with rock pressure balancing function, characterized in that: The tunneling drill comprises a control cabin (1), a mobile base (2) is mounted at the bottom of the control cabin (1), a telescopic arm (4) is mounted at one end of the control cabin (1), a tunneling assembly (5) is slidably mounted on the telescopic arm (4), and a support frame (3) is mounted on the mobile base (2); The tunneling assembly (5) comprises a connecting slide rail (8), the connecting slide rail (8) is slidably mounted on the telescopic arm (4), a driving motor (10) and a hydraulic device (9) are mounted on the connecting slide rail (8), a tunneling drill rod (7) is connected to the output shaft of the hydraulic device (9), the tunneling drill rod (7) is slidably connected to the connecting slide rail (8), the driving motor (10) is transmission-connected to the tunneling drill rod (7), a sliding base (12) is slidably mounted on the connecting slide rail (8), an adjusting cylinder (11) is mounted on the connecting slide rail (8), the output shaft of the adjusting cylinder (11) is connected to the sliding base (12), a rock pressure balancer (6) is mounted on the sliding base (12), one end of the tunneling drill rod (7) passes through the rock pressure balancer (6) and is mounted with a drill bit; The rock pressure balancer (6) comprises a rock pressure housing, a sensing component (63) is installed in the rock pressure housing, transmission components (64) are symmetrically installed at both ends of the sensing component (63), a rotating component (65) and a protective component (61) are symmetrically installed in the rock pressure housing, the rotating component (65) is engaged with the transmission component (64), the rotating component (65) is connected to the protective component (61), a reset component (62) is symmetrically installed in the rock pressure housing, the reset component (62) is slidably connected to the rotating component (65), and a reset motor is installed in the rock pressure housing, the reset motor is transmission-connected to the rotating component (65) via a belt.

2. The tunneling drill with rock pressure balancing function according to claim 1, characterized in that: The sensing component (63) comprises a sensing cylinder (631) and a pressure sensor (639); the sensing cylinder (631) is installed in a rock pressure housing via a connecting piece; a plurality of roller connecting rods (633) are slidably installed on the sensing cylinder (631); a sensing roller (632) is rotatably installed on one end of the roller connecting rod (633); a sensing plate (635) is installed on the other end of the roller connecting rod (633); a sensing spring (634) is installed between the sensing plate (635) and the sensing roller (632); a sensing contact (638) is installed on the sensing plate (635); the pressure sensor (639) is installed in the rock pressure housing; a pressure spring (6310) is installed between the sensing contact (638) and the rock pressure housing; the pressure sensor (639) is located in the middle of the pressure spring (6310); and a transmission component (64) is symmetrically installed on the sensing cylinder (631).

3. The tunneling drill with rock pressure balancing function according to claim 2, characterized in that: The sensing component (63) further comprises a sensing slide bar (6311), the sensing slide bar (6311) being slidably connected to the sensing plate (635), sensing slide blocks (637) being symmetrically mounted at both ends of the sensing slide bar (6311), a sliding hook (636) being mounted on the sensing slide block (637), the sliding hook (636) being slidably connected to the transmission component (64), and the sensing slide block (637) being slidably connected to the rock pressure housing.

4. The tunneling drill with rock pressure balancing function according to claim 3, characterized in that: The transmission assembly (64) comprises a transmission ring (641) and a transmission connecting rod (643); a transmission sliding rod (642) is slidably mounted on the transmission connecting rod (643); the transmission sliding rod (642) is connected to the transmission ring (641); the transmission connecting rod (643) is mounted on the induction tube (631); a sliding spring (644) is mounted between the transmission connecting rod (643) and the transmission ring (641); a plurality of clamping blocks (645) are mounted on the transmission ring (641); and the clamping blocks (645) are engaged with the rotating assembly (65).

5. The tunneling drill with rock pressure balancing function according to claim 4, characterized in that: The rotating assembly (65) comprises a main rotating ring (659), a plurality of slider connecting rods (657) are slidably mounted on the main rotating ring (659), a transmission block (652) is mounted on one end of the slider connecting rod (657), a slider spring (658) is mounted between the transmission block (652) and the main rotating ring (659), a limit block (656) is mounted on the transmission block (652), the limit block (656) is engaged with the clamping block (645), and the slider connecting rod (657) is slidably connected to the reset assembly (62).

6. The tunneling drill with rock pressure balancing function according to claim 5, characterized in that: The rotating assembly (65) further comprises a rotating ring (651) and a rotating slide bar (654); the rotating slide bar (654) is slidably mounted on the main rotating ring (659); a rotating clamping block (653) is mounted on one end of the rotating slide bar (654); a rotating spring (655) is mounted between the rotating clamping block (653) and the main rotating ring (659); a plurality of grooves are provided on the rotating ring (651); the rotating ring (651) is engaged with the rotating clamping block (653) via the grooves; and the rotating ring (651) is connected to the protective assembly (61).

7. The tunneling drill with rock pressure balancing function according to claim 5, characterized in that: The reset assembly (62) comprises a reset disk (621), the reset disk (621) being movably connected to the rock pressure housing, a bidirectional reset cylinder (622) being installed between the reset disks (621), a reset connecting rod (624) being rotatably installed on the reset disks (621), a reset ring (623) being rotatably installed between the reset connecting rods (624), and the reset ring (623) being slidably connected to the slider connecting rod (657).

8. The tunneling drill with rock pressure balancing function according to claim 6, characterized in that: The protection component (61) comprises a sliding ring (611) and a sliding rod (613). The sliding ring (611) is fixedly mounted in a rock pressure housing. An adjusting ring (612) is rotatably mounted on the sliding ring (611) on a side close to the sensing component (63). The adjusting ring (612) is connected to a rotating ring (651). The adjusting ring (612) is connected to a reset motor through a belt. The sliding rod (613) is slidably connected to the sliding ring (611). The sliding rod (613) is slidably connected to the adjusting ring (612). A protection pressure rod (614) is mounted on the sliding rod (613). A protection connecting rod (618) is slidably mounted on the protection pressure rod (614). A protection cylinder (617) is rotatably mounted on the protection connecting rod (618). A protection wheel (616) is mounted on the protection cylinder (617). A protection spring (619) is mounted between the protection cylinder (617) and the protection pressure rod (614).

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