A rock drill for tunnel construction

Abstract

The present invention discloses a universal arm and a rock drill for tunnel construction. The universal arm comprises a boom, a front support is provided at the front end of the boom, a guide rail sliding frame is rotatably provided on the front support through a first pivot, a guide rail sliding frame rotation driving oil cylinder is connected between the guide rail sliding frame and the front support; a guide rail support is rotatably provided on the guide rail sliding frame through a second pivot parallel to the bearing surface of the front support, and a flip driving device for driving the guide rail support to flip is provided between the guide rail support and the guide rail sliding frame rotation driving oil cylinder. The rock drill for tunnel construction is composed of a universal arm and a step-type rock drill provided on the universal arm. The beneficial effects of the present invention are that the universal arm has a simple structure, occupies less space, is light in weight, and has reliable functions. The rock drill for tunnel construction gives full play to the technical advantages of the step-type rock drill and the universal arm, provides guarantee for the mechanized operation of tunnel construction, has high construction efficiency, and low construction cost.

Description

Technical Field

[0001] The invention relates to a guide rail structure, in particular to a universal arm and a rock drill for tunnel construction. Background Art

[0002] Universal arm is a manipulator arm with multiple degrees of freedom. It is widely used in various large and small equipment, such as the arm of a robot in industrial automation equipment, cement slurry spraying anchor in large construction equipment, and the manipulator arm used as a construction unit in large tunnel construction equipment. However, with the development of tunnel construction technology, such as the application of stepping rock drills in construction, in order to meet the requirements of drilling position and angle adjustment, and limited by the construction environment and space, the rock drill as a whole needs to rotate around the Z axis in the XY plane, and also needs to rotate around the Y axis in the ZX plane, where the longitudinal direction of the guide rail is defined as the Y-axis direction. Although the degrees of freedom of the existing universal arm can meet the requirements, the driving devices for rotating around the two axes are hydraulic motors, which are expensive and heavy, and are not suitable for stepping rock drills. For this reason, it is necessary to improve the existing universal arm. The stepping rock drill is a mechanized rock drilling equipment used to replace manual rock drilling in tunnel construction. It is formed by setting a manual shoulder-carried pneumatic rock drill on a guide rail. It can realize automated rock drilling and drilling with step-by-step advancement through simple industrial control technology. Compared with large-scale special large-scale rock drilling equipment, it is inexpensive to manufacture, maintain and use, and is particularly suitable for tunnel construction by domestic construction teams. However, the existing rock drilling machine is not combined with a universal arm, and cannot fully utilize the advantages of the universal arm's multiple degrees of freedom to achieve the convenience of adjusting the drilling position and angle during tunnel excavation. Summary of the invention

[0003] The first purpose of the present invention is to provide a universal arm to solve the problems of the prior art, such as the large weight and high cost of the universal arm. The universal arm can meet the requirements of the stepping rock drill for adjusting the drilling direction and the drilling position in tunnel construction through the longitudinal rotation structure and the pivot rotation perpendicular to the end bearing surface. The structure is simple and the function is reliable. The second purpose of the present invention is to provide a tunnel construction rock drill including the universal arm. The rock drill has multiple degrees of freedom to meet the requirements of the drilling position and angle adjustment during the tunnel construction process.

[0004] To achieve the first purpose, the present invention adopts the following technical solution.

[0005] A universal arm comprises a boom, a front support is provided at the front end of the boom, a guide rail sliding frame is rotatably provided on the front support via a first pivot, a guide rail sliding frame rotation driving cylinder is connected between the guide rail sliding frame and the front support; a guide rail support is rotatably provided on the guide rail sliding frame via a second pivot parallel to the bearing surface of the front support, and a flipping drive device for driving the guide rail support to flip is provided between the guide rail support and the guide rail sliding frame rotation driving cylinder.

[0006] The present invention adopts the above-mentioned technical solution. By setting a two-stage flip mounting seat on the front support, the bearing surface of the front support forms the UV plane of the relative coordinate system UVW. The guide rail sliding frame can rotate around the W axis within the bearing surface. When a stepping rock drill is set on the guide rail support, the drilling direction can be adjusted. When the longitudinal direction of the rock drill guide rail is consistent with the second pivot axis, the second pivot axis is parallel to the V axis, and the rock drill can rotate longitudinally with the second pivot to meet the drilling position adjustment requirements of the peripheral holes of the tunnel face. It replaces the traditional hydraulic motor with a structure combining a driving cylinder and a pivot, which makes the structure simple, reduces the occupied space, reduces the weight, and has reliable functions and a wide range of applications. Among them, the front support articulated shaft, the first pivot and the second pivot constitute a UVW relative coordinate system relative to the boom.

[0007] Preferably, the flip driving device comprises a flip driving oil cylinder, the cylinder body and piston rod of which are respectively hinged on the guide rail sliding frame and the guide rail support, so as to realize flip driving through a simple and mature telescopic power element, thereby simplifying the structure and reducing the probability of failure.

[0008] Further preferably, the guide rail sliding frame is in the shape of an elongated strip, and at least two guide rail supports are distributed in the length direction of the guide rail sliding frame; the flip driving cylinders on the multiple guide rail supports are synchronously extended and retracted, so that uniform and stable support for the components to be installed is formed through the multiple guide rail supports.

[0009] Preferably, the front support is hinged at the front end of the boom, and a hydraulic support rod is provided between the free end of the front support and the boom, so as to realize the rotation of the front support around the U axis in the VW plane of the UVW relative coordinate system, and realize the fine adjustment of the drilling rig angle.

[0010] Preferably, the boom is a two-stage telescopic structure, the boom is hinged on the boom mounting seat, and the boom mounting seat is hinged on the rear support; a cross universal joint structure is formed between the boom and the rear support through the horizontal intersection axis and the vertical intersection axis on the boom mounting seat; wherein the pitch angle of the boom is adjusted by the pitch adjustment cylinder installed on the boom mounting seat; the horizontal rotation angle of the boom is adjusted by the horizontal adjustment cylinder installed on the base mounting seat. In the absolute coordinate system XYZ, the hinge axis between the boom and the boom mounting seat is parallel to the X axis, and the hinge axis between the boom and the rear support is parallel to the Z axis, and telescopes along the Y axis.

[0011] Preferably, the guide rail support is a slide structure, and a mobile drive cylinder is provided on the guide rail support; the mobile drive cylinder is used to drive the third component provided through the guide rail support. The third component can be driven to move by the mobile drive cylinder. When the third component is a stepping rock drill, the overall longitudinal movement of the rock drill relative to the guide rail support can be achieved, and the telescopic length of the boom can be compensated, which is more convenient for adjusting the drilling position and facilitating the guide rail movement adjustment requirements during the process of fixing the front end of the guide rail.

[0012] To achieve the second purpose, the present invention adopts the following technical solution.

[0013] A tunnel construction rock drill includes a walking rock drill, which is installed on a guide rail support of a universal arm to achieve the first invention purpose; and in the scheme where the guide rail support is a slide structure, the walking rock drill constitutes the third component.

[0014] The present invention adopts the above-mentioned technical solution. By arranging a two-stage flip mounting seat on the front support, the bearing surface of the front support constitutes the UV plane of the relative coordinate system UVW. The guide rail sliding frame can rotate around the W axis within the bearing surface. The scheme of arranging a stepping rock drill on the guide rail support can realize the adjustment of the drilling direction. When the longitudinal direction of the rock drill guide rail is consistent with the second pivot axis, the second pivot axis is parallel to the V axis, and the rock drill can rotate longitudinally with the second pivot to meet the drilling position adjustment requirements of the peripheral holes of the tunnel face. It replaces the traditional hydraulic motor with a structure combining a driving cylinder and a pivot, so that the structure is simple, the occupied space is reduced, the weight is reduced, the function is reliable, and the application range is wide. Among them, the front support articulated shaft, the first pivot and the second pivot constitute the UVW relative coordinate system relative to the boom. Moreover, in the scheme where the guide rail support is in the form of a slide structure and the step-type rock drill constitutes the third component, the overall longitudinal movement of the rock drill relative to the guide rail support can be realized, the telescopic length of the boom can be compensated, and the drilling position adjustment and the guide rail movement adjustment requirements during the fixing process of the front end of the guide rail can be more convenient.

[0015] Preferably, the step-type rock drill has a drill-holding and drill-retracting device; the drill-holding and drill-retracting device includes a locking slider and a driving mechanism with a reciprocating output motion, the driving mechanism is connected between the rock drill bearing slide and the locking slider, and the locking slider is only longitudinally movable on the rock drill bearing slide; the locking slider can cooperate with the locking hole on the guide rail of the step-type rock drill through a locking pin driven by a locking cylinder to form a locked state with the guide rail. By arranging the first locking device of the rock drill bearing slide between the slider and the guide rail, the slider can be movably arranged relative to the rock drill bearing guide rail, and when the slider and the guide rail are locked by the first locking device, the rock drill bearing slide can move longitudinally under the action of the driving mechanism, so that when the drill needs to be retracted after being stuck, the rock drill bearing slide is retreated to achieve the purpose of retracting the drill, so that the drill bit can be easily retracted when the drill is stuck, and the structure is simple and the drill retracting function is reliable.

[0016] Preferably, the step-type rock drill has a front end positioning device; and the guide rail of the rock drill is an extendable structure in the length direction; the front end positioning device forms a front end positioning support of the guide rail by inserting into the rock mass; the guide rail forms a variable length structure through a base section and an extension section; an extension positioning structure and an extension locking mechanism are provided between the base section and the extension section; and the base section and the extension section are connected by an inclined joint surface; the joint surface gradually tilts outward from top to bottom on the base section; wherein the extension positioning structure is used to prevent the base section and the extension section from being dislocated left and right and up and down; the extension locking mechanism. The length of the guide rail can be increased or decreased according to different construction advances, and the guide rail has good rigidity and high strength after extension, reliable connection, good stability, and safe use.

[0017] Preferably, the step-type rock drill includes an air leg, and an electric switch valve and an electric flow control valve arranged in parallel are provided on the air inlet or exhaust pipeline of the air leg. When drilling is advanced, the air leg is supplied with air by the electric flow control valve and the bypass, which is convenient for flow adjustment, realizes drilling speed adjustment, and meets the drilling speed requirements of rock masses with different hardness; when the electric switch valve is opened, the first pipeline is ventilated, and the air leg is quickly extended and retracted. When drilling is stepped, the air leg retracts to pull the air leg bearing slide to move forward quickly; when drilling is withdrawn, the air leg retracts to pull the rock drill bearing slide to move back quickly; the air leg extends to push the air leg bearing slide to move back quickly.

[0018] The beneficial effects of the present invention are that the universal arm has a simple structure, occupies less space, is light in weight, and has reliable functions. The tunnel construction rock drill can conveniently adjust the position and direction of the rock drill in various working conditions, such as the drilling position and angle, and the installation and fixation of the rock drill, by arranging a stepping rock drill on the universal arm and utilizing the characteristics of the universal arm with multiple degrees of freedom, less space occupation, and light weight. It also has functions such as drill biting and drill withdrawal, and increase or decrease of guide rail length, and has complete functions, which is conducive to realizing automatic control, providing guarantee for mechanized operation of tunnel construction, high construction efficiency, and low construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic axonometric diagram of the universal arm in the present invention.

[0020] Figure 2 It is a partial structural schematic diagram of the universal arm in the present invention.

[0021] Figure 3 It is a partial structural schematic diagram of the universal arm in the present invention, wherein the guide rail support is in a flipped state at a set angle.

[0022] Figure 4 It is a structural schematic axonometric diagram of the universal arm of the present invention from another perspective.

[0023] Figure 5 It is a schematic axonometric diagram of the structure of the tunnel boring rock drill in the present invention.

[0024] Figure 6 It is a structural schematic axonometric diagram of a stepping rock drill in a tunnel boring rock drill of the present invention.

[0025] Figure 7 It is a partial structural schematic diagram of the jacking device for the stepping rock drill in the present invention.

[0026] Figure 8 It is a schematic front view of the guide rail structure for a stepping rock drill of the present invention.

[0027] Fig. 9 The present invention Figure 8 Enlarged view of part A in .

[0028] Fig.10 The present invention Fig. 9 A top view of the extension locking mechanism, wherein the extension locking mechanism is in a locked state.

[0029] Fig.11 It is a structural schematic axonometric diagram of the guide rail fixing device for a rock drill in the present invention.

[0030] Fig.12 It is a schematic front view of the structure of the guide rail fixing device for the rock drill in the present invention.

[0031] Fig.13 It is a partial gas path principle diagram of the present invention. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the described embodiments.

[0033] Example 1, see Figure 1 , Figure 2 , Figure 3 , Figure 4 A universal arm comprises a boom 100, a front support 110 is provided at the front end of the boom 100, a guide rail sliding frame 120 is rotatably provided on the front support 110 via a first pivot, a guide rail sliding frame rotation driving cylinder 121 is connected between the guide rail sliding frame 120 and the front support 110; a guide rail support 130 is rotatably provided on the guide rail sliding frame 120 via a second pivot parallel to the front support bearing surface, and a flip driving device for driving the guide rail support 130 to flip is provided between the guide rail support 130 and the guide rail sliding frame rotation driving cylinder 121. Figure 5 The guide rail support 130 is a slide structure, and a movable driving cylinder 142 is provided on the guide rail support 130; the movable driving cylinder 142 is used to drive the third component set through the guide rail support 130; the bearing component 130 and the third component are connected through a rolling friction connection relationship to reduce the friction resistance of the third component sliding on the bearing component 130.

[0034] The flip driving device includes a flip driving cylinder 141, and the cylinder body and piston rod of the flip driving cylinder 141 are respectively hinged on the guide rail sliding frame 120 and the guide rail support 130. The guide rail sliding frame 120 is in a long strip shape, and at least two guide rail supports 130 are distributed in the length direction of the guide rail sliding frame 120; the flip driving cylinders 141 on the multiple guide rail supports 130 are synchronously extended and retracted.

[0035] The front support 110 is hinged to the front end of the boom 100, and a hydraulic strut 111 is provided between the free end of the front support 110 and the boom 100. The boom 100 is a two-stage telescopic structure, the boom 100 is hinged to the boom mounting seat 101, and the boom mounting seat 101 is hinged to the rear support 102; a cross universal joint structure is formed between the boom 100 and the rear support 102 through the horizontal intersection axis and the vertical intersection axis on the boom mounting seat 101; wherein, the pitch angle of the boom 100 is adjusted by the pitch adjustment cylinder 103 installed on the boom mounting seat 101; the horizontal rotation angle of the boom 100 is adjusted by the horizontal adjustment cylinder 104 installed on the base mounting seat 102.

[0036] In this embodiment, the boom 100 includes a base arm 100a, the base arm 100a is a rectangular tube structure, a primary telescopic arm 100b is installed in the base arm 100a, and the primary telescopic arm 100b is driven to telescopically move by a primary telescopic cylinder 100c, and the two ends of the primary telescopic cylinder 100c are respectively hinged on the base arm 100a and the primary telescopic arm 100b; the primary telescopic arm 100b is also a rectangular tube structure, and a secondary telescopic arm 100d is installed in the primary telescopic arm 100b, and the free end of the secondary telescopic arm 100d is connected to the front support 110, and the secondary telescopic arm 100d is connected to the front support 110. The telescopic movement is driven by the secondary telescopic cylinder 100e, and the two ends of the secondary telescopic cylinder 100e are respectively hinged on the secondary telescopic arm 100d and the primary telescopic arm 100b. The primary telescopic arm 100b is provided with an articulated lug 100f hinged to the secondary telescopic cylinder 100e, and the articulated lug 100f is located on the side wall of the primary telescopic arm 100b; the side wall of the base arm 100a is provided with a long waist groove, and the long waist groove is used to avoid the articulated lug 100f during the movement of the primary telescopic arm 100b.

[0037] Among them, the articulation axis of the boom 100 and the boom mounting seat 101, the articulation axis of the boom mounting seat 101 and the rear support 102, and the telescopic axis of the boom 100 correspond to the X-axis, Z-axis and Y-axis in the basic coordinate system XYZ respectively; the articulation axis of the front support 110 and the boom 100, the first pivot axis and the second pivot axis correspond to the U-axis, W-axis and V-axis in the relative coordinate system UVW respectively, and the moving direction of the third component is consistent with the V-axis.

[0038] Example 2, see Figure 5 , and combined with Figure 1-4 A tunnel construction rock drill includes a walking rock drill 200, the walking rock drill 200 is mounted on the guide rail support 130 of the universal arm of Example 1, and the guide rail support 130 is a slide structure; the walking rock drill 200 is longitudinally movable on the guide rail support 130, and a drilling machine moving drive cylinder 142 is provided between the guide rail support 130 and the walking rock drill 200. .

[0039] Among them, the articulation axis between the boom 100 and the boom mounting seat 101, the articulation axis between the boom mounting seat 101 and the rear support 102, and the telescopic axis of the boom 100 correspond to the X-axis, Z-axis and Y-axis in the absolute coordinate system XYZ respectively; the articulation axis between the front support 110 and the boom 100, the first pivot axis and the second pivot axis correspond to the U-axis, W-axis and V-axis in the relative coordinate system UVW respectively, and the overall moving direction of the stepping rock drill 200 is consistent with the V-axis.

[0040] See also Figure 6The stepping rock drill 200 includes a rock drilling machine 1, a guide rail 2, a drilling rig carrying slide 3, an air leg 14 and an air leg carrying slide 18, a first locking device is provided between the drilling rig carrying slide 3 and the guide rail 2; a drill withdrawal device is also provided on the drilling rig carrying slide 3; the drill withdrawal device includes a locking slider 5 and a driving mechanism 6 with a reciprocating output motion, the driving mechanism 6 is connected between the drilling rig carrying slide 3 and the locking slider 5, and the locking slider 5 is only longitudinally movable on the drilling rig carrying slide 3; the first locking device is provided between the locking slider 5 and the guide rail 2; the air leg 14 is connected between the drilling rig carrying slide 3 and the air leg carrying slide 18; a second locking device is provided between the air leg carrying slide 18 and the guide rail 2.

[0041] The driving mechanism 6 is composed of an oil cylinder. The oil cylinder is connected to the drilling rig bearing slide 3 through its cylinder body, and the locking slider 5 is fixedly connected to the far end of the piston rod of the oil cylinder; with the drilling direction of the rock drill as the front, the locking slider 5 is located in front of the oil cylinder, and when the piston rod of the oil cylinder is in a retracted state, the locking slider 5 is locked with the guide rail through the first locking device, and the piston rod is extended to implement drilling withdrawal; by utilizing the characteristic that the thrust of the oil cylinder piston rod extending is greater than the thrust of the retraction, the drilling withdrawal thrust can be increased under the condition of the same cylinder diameter, or the cylinder diameter can be reduced under the condition of the same drilling withdrawal thrust. Two opposite guide grooves are provided on the drilling rig bearing slide 3 through a protrusion, and the locking slider 5 is located between the two guide grooves, and guide parts that slide with the guide grooves are formed on both sides of the locking slider 5. The first locking device includes a first locking cylinder 4 and a plurality of locking holes distributed longitudinally on the guide rail 2; a locking pin integrally formed or fixedly connected on the piston rod of the first locking cylinder 4 cooperates with the locking hole to form a latch-type locking structure; a long hole is formed on the drilling rig bearing slide 3 for the locking pin to pass through and translate along the guide groove. The second locking device is also formed by using a plurality of locking holes distributed longitudinally on the guide rail 2 and a second locking latch on the piston rod of the second locking cylinder.

[0042] The front end of the guide rail 2 is provided with a front support sleeve 7 for supporting the drill rod, and the middle section of the guide rail 2 is provided with an intermediate support sleeve 8, which is arranged on the jacking device. Figure 7 The lifting device includes a lifting base and a lifting block 11. The lifting base 39 is adjustably arranged on the guide rail 2 and fixedly connected to the lifting cylinder 9. The distal end of the piston rod of the lifting cylinder 9 is connected to a push block 10, and the front end of the push block 10 is provided with a pushing inclined surface; the lifting block 11 can only be vertically lifted and lowered in the lifting cylinder 12, and the lifting cylinder 12 is fixed on the lifting base. A roller 13 is provided at the lower end of the lifting block 11, and the roller 13 is rollingly connected to the pushing inclined surface; the intermediate support sleeve 8 is fixedly connected to the upper end of the lifting block 11.

[0043] See also Figure 8 , Fig. 9 , Fig.10The guide rail 2 is formed of a base section 21 and an extension section 22 to form a structure with variable length; an extension positioning structure and an extension locking mechanism are provided between the base section 21 and the extension section 22; and the base section 21 and the extension section 22 are connected by an inclined joint surface; the joint surface gradually tilts outward from top to bottom on the base section 21; the extension positioning structure is used to prevent the base section 21 and the extension section 22 from being misaligned left and right and up and down. The guide rail 2 includes a guide rail body and a track, the track is made of a round tube, and the guide rail body is made of a square tube or a rectangular tube; the extension positioning structure includes a positioning column 24 that matches the inner hole of the round tube of the track, a part of the positioning column 24 is inserted into the tube hole of the round tube track of the base section 21, and the other part is inserted into the tube hole of the round tube track of the extension section 22. The square tube or rectangular tube can be a rolled or drawn profile, or can be formed by bending and welding the steel plate; the guide rail body is formed by a combination of two square tubes in the height direction; a round tube is welded to the upper ends of both sides of the upper square steel tube, and the round tube constitutes the track, and a round tube, square tube or, shaped tube, flat steel or angle iron is welded to both sides of the lower end of the lower square steel tube, and the lower round tube, square tube or, shaped tube, flat steel or angle iron is used for guide rail installation and fixation.

[0044] The guide rail body is provided with two parallel rails; the positioning columns 24 are provided in the tube holes of the two circular tube rail joints of the base section 21 and the extension section 22. The base section 21 and the extension section 22 are connected by two connecting plates 25, and the joint surfaces of the two connecting plates 25 constitute the joint surfaces of the base section 21 and the extension section 22. The two connecting plates 25 are welded and fixed on the guide rail bodies of the base section 21 and the extension section 22 respectively. The connecting plate 25 is welded to the square tube below, and the end plate is welded to the end of the square tube above, and the positioning tube is welded to the end plate; the third positioning column 23 is inserted into the positioning tubes on the two end plates, and the three positioning columns are distributed at the three corners of the isosceles triangle.

[0045] The extension locking mechanism is an eccentric locking structure. The extension locking mechanism includes a hook 26 and a buckle 27. The hook 26 is fixedly arranged on the base section 21; the buckle 27 is hinged on the handle 28, and the handle 28 is hinged on the extension section 22. The buckle 27 is movably arranged on a buckle seat 29, and the buckle seat 29 is hinged on the handle 28. A loading spring 30 is passed between the buckle seat 29 and the buckle 27. Among them, a connecting rod 27a is welded at one end of the ring buckle 27, and a guide block 27b is welded at the free end of the connecting rod 27a; one end of the ring buckle seat 29 has a rod-shaped structure, and the ring buckle seat 29 is hinged to the handle 28 through one end of the rod-shaped structure, and the other end of the ring buckle seat 29 is a frame-shaped structure, and the connecting rod 27a extends into the frame from one end of the frame-shaped structure, and a slide groove 29a is provided on the frame walls on both sides of the frame-shaped structure, and the guide block 27b slides in the slide groove 29a; one end of the loading spring 30 abuts on the guide block 27b, and the other end abuts on the inner wall of one end of the frame-shaped structure. The hinge seat of the handle 28 is composed of two independent ears 28a, and the intersection axis is composed of two semi-axles 8b; in the locked state, the hinge center of the ring buckle seat 29 and the handle 28 and the hinge center connecting line of the handle 28 and the extension section 22 coincide on the axis of the connecting rod 27a. The hook 26 may also be arranged on the extension section 22 , and the handle 28 may be hinged on the base section 21 .

[0046] In addition, a guide rail fixing device 40 for supporting the guide rail 2 through the rock mass is provided at the lower front end of the guide rail 2. The front end fixing device forms a support for the overhanging part of the guide rail 2, thereby improving the support strength and rigidity of the guide rail. Among them, the guide rail fixing device 40 uses a component that can be inserted into the rock mass to provide support, and different structures can be set according to the characteristics of the tunnel rock mass. For example, for soft rock mass, a steel drill with a cone tip at the front end can be set at the front end of the guide rail, and the steel drill is kept firmly inserted into the rock mass by a tightening spring; a drill rig or a small rock drill can also be fixed at the front end of the guide rail, and after the drill rod is drilled in, the drill rod is used to form a supporting component.

[0047] See also Fig.11 , Fig.12 In the scheme in which the guide rail fixing device 40 is composed of a small rock drill, it includes a positioning seat 41 for fixing under the front end of the drill arm, a positioning rock drill 42 with a pneumatic mechanism is slidably hoisted on the positioning seat 41, the front end of the positioning rock drill 42 is used to set a drill rod 47, and the rear end of the positioning rock drill 42 is provided with a push cylinder or oil cylinder 43; the front end of the positioning seat 41 is fixedly connected to a top 46.

[0048] Among them, a drill rod guide seat 48 is provided in front of the positioning rock drill 42, and a drill rod guide hole is provided on the drill rod guide seat 48, and the drill rod guide seat 48 is fixedly connected to the positioning seat 41. The positioning seat 41 is tubular; a crossbeam 49 is slidably fitted in the positioning seat 41, and a lifting lug seat 49a is provided on the crossbeam 49; a strip-shaped avoidance groove is provided on the lower side of the pipe wall of the positioning seat 41; the lifting lug seat 49a passes through the strip-shaped avoidance groove and is hinged to the lifting lug on the positioning rock drill 42; two supports 44 are fixedly connected in the positioning seat 41, and the two supports 44 are slidably fitted on the crossbeam 49.

[0049] The push cylinder or oil cylinder 43 is fixedly arranged in the protection tube 45, and the protection tube 45 is fixedly connected to the rear part of the lower end of the positioning seat 41. The push cylinder or oil cylinder 43 is hinged to the rear end of the positioning rock drill 42. When the piston rod of the cylinder or oil cylinder retracts, the pneumatic rock drill is pulled back, and then the drill rod is withdrawn from the positioning hole, which is convenient for the drill arm to change its position. Among them, a guide sleeve 48a is provided in the drill rod guide seat 48, and the guide hole is provided in the guide sleeve 48a. So that the guide sleeve 48a can be replaced separately after being worn, reducing the use cost.

[0050] See also Fig.13 When the gas leg 14 propels the rock drilling machine 1 to drill, the air inlet and exhaust pipelines of the gas leg 14 are respectively composed of an air inlet pipeline 15 and an exhaust pipeline 34, and the air inlet pipeline 15 is provided with an electric switch valve 16 and an electric flow regulating valve 17 arranged in parallel. Among them, the rock drilling machine 1 is connected with a drilling air supply pipe 32 and a slag blowing air supply pipe 33 through the rear cover of the drilling machine, and the drilling air supply pipe 32 and the slag blowing air supply pipe 33 are connected to the main air supply pipeline through an electric control valve; the air inlet pipeline 15 and the exhaust pipeline 34 are connected to the electromagnetic reversing valve 35, the air inlet of the electromagnetic reversing valve 35 is connected to the main air supply pipe, and the exhaust port of the electromagnetic reversing valve 35 is connected to the atmospheric environment.

[0051] Among them, the electric switch valve 16 is connected to the air intake pipeline 15, and the electric flow regulating valve 17 is connected to the air intake bypass. The bypass is arranged in parallel with the air intake pipeline 15, and the diameter of the bypass is smaller than that of the air intake pipeline 15. The electric switch valve 16 is a normally closed structure; the electromagnetic reversing valve 35 is a three-position five-way valve with a center-sealed structure; the electric control valve used to control the drilling air supply pipe 32 and the slag blowing air supply pipe 33 is composed of a first electromagnetic valve 36 and a second electromagnetic valve 37, and the first electromagnetic valve 36 and the second electromagnetic valve 37 are both switch valves; an oil pot 38 is also arranged on the air supply main pipeline; the diameter of the drilling air supply pipe 32 is larger than that of the slag blowing air supply pipe 33.

[0052] In this embodiment, when the guide rail support 130 does not adopt a slide structure, the walking rock drill 200 is fixedly connected to the guide rail support 130. The walking rock drill 200 of this solution cannot move as a whole on the guide rail support 130, and its connection is firm and has good rigidity. It is suitable for tunnel boring rock drills that do not need to adjust the longitudinal position.

[0053] In this embodiment, the electromagnetic reversing valve 35 may also adopt a two-position five-way valve to replace a three-position five-way valve. Moreover, the electric switch valve 16 and the electric flow regulating valve 17 may also be connected in parallel to the exhaust pipeline 34 of the gas leg 14.

[0054] In this embodiment, the front support sleeve 7 and the intermediate support sleeve 8 both include a bushing and a bushing seat. The bushing can rotate freely relative to the bushing seat. The bushing seat of the front support sleeve 7 is fixedly connected to the front end of the guide rail 2 through the front bracket; the bushing seat of the intermediate support sleeve 8 is fixedly connected to the upper end of the lifting block 11.

[0055] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A tunnel construction rock drill, comprising a walking rock drill and a universal arm, characterized in that: The walking rock drill is mounted on a guide rail support (130) of a universal arm; The universal arm comprises a boom (100), a front support (110) is provided at the front end of the boom (100), a guide rail sliding frame (120) is rotatably provided on the front support (110) via a first pivot, a guide rail sliding frame rotation driving oil cylinder (121) is connected between the guide rail sliding frame (120) and the front support (110); a guide rail support (130) is rotatably provided on the guide rail sliding frame (120) via a second pivot parallel to the front support bearing surface, and a flip driving device for driving the guide rail support (130) to flip is provided between the guide rail support (130) and the guide rail sliding frame rotation driving oil cylinder (121); The tilting drive device comprises a tilting drive oil cylinder (141), wherein a cylinder body and a piston rod of the tilting drive oil cylinder (141) are respectively hinged on the guide rail sliding frame (120) and the guide rail support (130); The guide rail sliding frame (120) is in the shape of an elongated strip, and at least two guide rail supports (130) are distributed in the length direction of the guide rail sliding frame (120); the turning driving cylinders (141) on the multiple guide rail supports (130) are synchronously extended and retracted; The front support (110) is hinged to the front end of the boom (100), and a hydraulic support rod (111) is provided between the free end of the front support (110) and the boom (100); The guide rail support (130) is in the form of a slide structure, and a movable driving oil cylinder (142) is provided on the guide rail support (130); the movable driving oil cylinder (142) is used to drive a third component provided through the guide rail support (130); a step-type rock drill constitutes the third component; The hinge axis of the front support (110) and the boom (100), the first pivot axis and the second pivot axis respectively correspond to form a U axis, a W axis and a V axis in a relative coordinate system UVW, and the overall moving direction of the stepping rock drill is consistent with the V axis.

2. The tunnel construction rock drill according to claim 1, characterized in that: The boom (100) has a two-stage telescopic structure; the boom (100) is hinged on a boom mounting seat (101), and the boom mounting seat (101) is hinged on a rear support (102); a cross universal joint structure is formed between the boom (100) and the rear support (102) via a horizontal intersection axis and a vertical intersection axis on the boom mounting seat (101); wherein the pitch angle of the boom (100) is adjusted by a pitch adjustment cylinder (103) installed on the boom mounting seat (101); and the horizontal rotation angle of the boom (100) is adjusted by a horizontal adjustment cylinder (104) installed on the rear support (102).

3. The tunnel construction rock drill according to claim 1, characterized in that: The step-type rock drill has a drill-holding and drill-retracting device; the drill-holding and drill-retracting device comprises a locking slider (5) and a driving mechanism (6) with a reciprocating output motion, the driving mechanism (6) being connected between a rock drill bearing slide (3) and the locking slider (5), the locking slider (5) being arranged on the rock drill bearing slide (3) so as to be movable only longitudinally; the locking slider (5) can cooperate with a locking hole on a guide rail (2) of the step-type rock drill through a locking pin driven by a locking cylinder (4) to form a locking state with the guide rail (2).

4. The tunnel construction rock drill according to claim 1, characterized in that: The step-type rock drill has a front end positioning device; and the guide rail of the rock drill is an extendable structure in the length direction; the front end positioning device forms a front end positioning support of the guide rail by inserting into the rock mass; the guide rail forms a length-variable structure through a base section (21) and an extension section (22); an extension positioning structure and an extension locking mechanism are provided between the base section (21) and the extension section (22); and the base section (21) and the extension section (22) are connected by an inclined joint surface; the joint surface is gradually inclined outward from top to bottom on the base section (21); wherein the extension positioning structure is used to prevent the base section (21) and the extension section (22) from being dislocated left and right and up and down; and the extension locking mechanism.

5. The tunnel construction rock drill according to claim 1, characterized in that: The step-type rock drill comprises an air leg (14), and an electric switch valve (16) and an electric flow regulating valve (17) arranged in parallel are provided on an air intake pipeline (15) or an air exhaust pipeline of the air leg (14).

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