A stepping rock drill with a drill retraction device

Abstract

The present invention discloses a step-by-step rock drill with a drill withdrawal device, including a rock drilling main unit, a guide rail, and a drill rig bearing slide, wherein a first locking device is provided between the drill rig bearing slide and the guide rail; a drill withdrawal device is also provided on the drill rig bearing slide; the drill withdrawal device includes a locking slider and a driving mechanism with a reciprocating output motion, the driving mechanism is connected between the drill rig bearing slide and the locking slider, and the locking slider can only be longitudinally moved on the drill rig bearing slide; the first locking device is provided between the locking slider and the guide rail. The beneficial effect of the present invention is that the drill bit can be easily withdrawn when the drill is stuck, and the length of the drill rig guide rail can be adjusted according to the footage, and the front end of the drill rig is firmly supported, and after the drilling is completed, the drill rig can be withdrawn smoothly as a whole. It has complete functions, is conducive to realizing automatic control, provides guarantee for the mechanized operation of tunnel construction, and can effectively reduce tunnel over-excavation, improve construction efficiency, and reduce construction costs.

Description

Technical Field

[0001] The invention relates to a guide rail structure, in particular to a stepping rock drill with a drill retracting device. Background Art

[0002] The stepping rock drill is a mechanized rock drilling equipment used to replace manual rock drilling in tunnel construction. It is formed by placing a manual shoulder-carried pneumatic rock drill on a guide rail. Specifically, it includes a drilling rig carrying slide and an air leg carrying slide that can move on the guide rail. The drilling rig is set on the drilling rig carrying slide, and one end of the air leg is connected to the drilling rig carrying slide; the other end is connected to the air leg carrying slide. A locking device is provided between the two slides and the guide rail. When the drilling rig carrying slide is locked, the air leg carrying slide moves forward or backward along the drilling direction as the air leg is retracted or extended; when the air leg carrying slide is locked, the drilling rig and the drilling rig carrying slide move forward and backward as the air leg is extended or retracted, thereby forming a stepping rock drilling, which can be automated through simple industrial control technology. Compared with large-scale special large-scale rock drilling equipment, the drilling rig has low cost, low maintenance and use costs, and is particularly suitable for tunnel construction by domestic construction teams. However, in the actual construction process, the drill bit is inevitably stuck due to factors such as changes in the tunnel geological structure. Although the air leg has the function of retracting the drill, the drill bit cannot be smoothly retracted due to the large force of the drill being stuck and the air leg is limited by its own structure and function. Therefore, it is necessary to set a device on the drilling rig specifically for retracting the drill bit when the drill is stuck. Summary of the invention

[0003] The purpose of the present invention is to provide a stepping rock drill with a drill withdrawal device to solve the problem that the prior art stepping rock drill cannot be smoothly withdrawn after the drill is stuck, so as to smoothly withdraw the drill bit when the drill is stuck.

[0004] To achieve the aforementioned objectives, the present invention adopts the following technical solutions.

[0005] A step-by-step rock drill with a drill retracting device comprises a rock drilling main unit, a guide rail, and a drill rig carrying slide, wherein a first locking device is provided between the drill rig carrying slide and the guide rail; a drill retracting device is also provided on the drill rig carrying slide; the drill retracting device comprises a locking slider and a driving mechanism with a reciprocating output motion, the driving mechanism is connected between the drill rig carrying slide and the locking slider, and the locking slider is provided on the drill rig carrying slide so as to be movable only longitudinally; the first locking device is provided between the locking slider and the guide rail.

[0006] The present invention adopts the above-mentioned technical solution, and a drill withdrawal device is arranged between the drilling rig bearing platform and the guide rail. The drill withdrawal device is arranged by arranging the first locking device of the drilling rig bearing slide between the slider and the guide rail, and the slider can be arranged to be movable relative to the drilling rig bearing guide rail. When the slider and the guide rail are locked by the first locking device, the drilling rig bearing slide can move longitudinally under the action of the driving mechanism, so that when the drill needs to be withdrawn after the drill is stuck, the drilling rig bearing slide is retreated to achieve the purpose of withdrawing the drill. And according to the stuck drill situation, the first locking device can be locked and unlocked, and the driving mechanism can be extended and retracted alternately to complete the drill withdrawal process of the set distance or length. Among them, the driving mechanism can adopt a hydraulic cylinder, a screw nut auxiliary drive structure or a crank slider drive structure. It has a simple structure, a strong drill withdrawal ability, reliable functions, and is convenient to realize automatic control. For example, through manual observation or torque detection, it is determined that the drill bit is about to be stuck or stuck, and the drill withdrawal action of withdrawing the drill bit is implemented through line control, remote control or remote control.

[0007] Preferably, the driving mechanism is composed of a cylinder. The cylinder can be connected to one of the drilling rig bearing slide or the locking slider through its cylinder body, and the other is connected to the distal end of the piston rod of the cylinder. The characteristics of the cylinder with high pressure and large thrust are utilized to reduce the volume of the driving mechanism, reduce the weight, and facilitate the layout of the whole machine while ensuring sufficient drilling power; the connection between the cylinder and the drilling rig bearing slide and the locking slider is usually hinged to ensure flexible operation. When the locking slider is arranged in front of the cylinder in the drilling direction, the locking slider is locked with the guide rail through the first locking device when the cylinder piston is retracted, and the cylinder piston rod is extended to implement drilling; but when the locking slider is arranged behind the cylinder in the drilling direction, the locking slider is locked with the guide rail through the first locking device when the cylinder piston is extended, and the cylinder piston rod is retracted to implement drilling.

[0008] Further preferably, the drilling rig bearing slide is provided with two opposite guide grooves through a protrusion, the locking slide is located between the two guide grooves, and guide parts that slide with the guide grooves are formed on both sides of the locking slide. A guide rail auxiliary structure with a simple structure is formed by the cooperation of the guide grooves and the guide parts, ensuring that the locking slide moves in a determined direction and operates flexibly.

[0009] Preferably, the first locking device comprises a first locking cylinder and a plurality of locking holes longitudinally distributed on the guide rail; a locking pin integrally formed or fixedly connected on the piston rod of the first locking cylinder cooperates with the locking hole to form a latch-type locking structure; and a long hole for the locking pin to translate along the guide groove is formed on the drilling rig bearing slide. Locking and unlocking are achieved by telescopic movement of the locking cylinder piston rod, thereby simplifying the structure, improving reliability, and reducing costs.

[0010] Preferably, the front end of the guide rail is provided with a front support sleeve for supporting the drill rod, and the middle section of the guide rail is provided with an intermediate support sleeve, which is arranged on the jacking device. Taking advantage of the fact that the drill rod of the slender member has a certain deflection, the drill rod is jacked up in the middle of the drill rod to form an arch shape, so that when drilling the peripheral holes, the drill bit forms a certain bending arc to drill into the rock mass, avoiding serious over-excavation caused by the straight-line drilling method, so as to effectively reduce the over-excavation amount and improve the tunnel excavation efficiency. Usually, after the drill bit drills into a certain depth such as 1-2 meters, the jacking state is released, and the drill hole formed with a certain arc constitutes a guide hole for the drill bit to drill forward, forming a drilling method that is the same as the over-excavation reduction measure in the manual drilling process. Among them, the jacking device uses a cylinder, a hydraulic cylinder, etc. as a power source to reduce the occupied space and facilitate the layout. Of course, other linear motion drive structures can also be used under the condition that space permits, such as a screw nut pair drive structure, a gear rack drive structure, or a crank slider drive structure.

[0011] Further preferably, the jacking device includes a jacking base and a lifting block, the jacking base is arranged on the guide rail and fixedly connected with a jacking cylinder, the piston rod of the jacking cylinder is connected with a push block at the far end, and the front end of the push block is provided with a jacking inclined surface; the lifting block can only be vertically lifted and lowered in the jacking cylinder, the jacking cylinder is fixed on the jacking base, the lower end of the lifting block is provided with a roller, and the roller is connected with the jacking inclined surface in a rolling manner; the intermediate support sleeve is fixedly connected with the upper end of the lifting block. The jacking cylinder is arranged to be parallel to the longitudinal direction of the drill pipe through the jacking inclined surface, so as to make full use of the length space, reduce the occupation of the height space, and improve the rationality of the layout.

[0012] Preferably, the guide rail is formed of a base section and an extension section to form a variable length structure; 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; the extension positioning structure is used to prevent the base section and the extension section from being misaligned left and right and up and down. This allows the guide rail length to be increased or decreased according to the different construction footages, broadening the scope of use, and through the positioning structure and the extension locking structure, ensure that the extended guide rail has good overall rigidity, high strength, reliable connection, safe use, and no misalignment up and down and left and right, ensuring that the slide on the guide rail moves flexibly at the joint.

[0013] Further preferably, the extension locking mechanism is an eccentric locking structure, which utilizes the characteristic of the eccentric locking structure to conveniently form a locking dead point, thereby ensuring locking reliability and convenient operation.

[0014] Preferably, a guide rail fixing device for supporting the guide rail through the rock mass is fixedly connected to the lower front end of the guide rail. The front end fixing device is used to form support for the overhanging part of the guide rail, thereby improving the support strength and rigidity of the guide rail, thereby improving the drilling speed and construction efficiency. Among them, the guide rail fixing device 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 conical 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 drilling rig 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.

[0015] Preferably, it also includes an air leg, and an electric switch valve and an electric flow control valve are arranged in parallel on the air intake or exhaust pipeline of the air leg. In the process of drilling the air leg, the electric flow control valve is used to control the air intake flow to adjust the drilling speed, and when the air leg needs to be quickly extended and retracted, the electric switch valve is used alone or together with the electric flow control valve to meet the large flow intake and exhaust requirements.

[0016] The beneficial effects of the present invention are that the drill bit can be easily withdrawn when the drill is stuck, and the length of the drill guide rail can be adjusted according to the drilling footage. The front end of the drill is firmly supported, and the drill can be withdrawn smoothly after the drilling is completed. It has complete functions, is conducive to the realization of automatic control, provides guarantee for the mechanized operation of tunnel construction, and can effectively reduce tunnel over-excavation, improve construction efficiency, and reduce construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic axonometric diagram of the structure of the present invention.

[0018] Figure 2 It is a partial structural schematic diagram of the jacking device in the present invention.

[0019] Figure 3 It is a schematic front view of the guide rail structure of the present invention.

[0020] Figure 4 The present invention Figure 3 Enlarged view of part A in .

[0021] Figure 5 The present invention Figure 4 A top view of the extension locking mechanism, wherein the extension locking mechanism is in a locked state.

[0022] Figure 6 It is a partial gas path principle diagram of the present invention. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 A stepping rock drill with a drill withdrawal device comprises a rock drilling main unit 1, a guide rail 2, a drilling rig carrying slide 3, an air leg 14 and an air leg carrying slide 18, wherein a first locking device is arranged between the drilling rig carrying slide 3 and the guide rail 2; a drill withdrawal device is also arranged on the drilling rig carrying slide 3; the drill withdrawal device comprises 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 arranged on the drilling rig carrying slide 3 so as to be movable only longitudinally; a first locking device is arranged 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 arranged between the air leg carrying slide 18 and the guide rail 2.

[0025] 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 connected to the distal end of the piston rod of the oil cylinder. The drilling rig bearing slide 3 is provided with two opposite guide grooves through a protrusion, and the locking slider 5 is located between the two guide grooves. Guide parts that slide and cooperate 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 longitudinally distributed 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 strip hole is formed on the drilling rig bearing slide 3 for the locking pin to translate along the guide groove. The second locking device is also formed by using a plurality of locking holes longitudinally distributed on the guide rail 2 and a second locking latch on the piston rod of the second locking cylinder.

[0026] 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 provided on the jacking device. The jacking device includes a jacking base and a lifting block 11, and the jacking base 39 is adjustable on the guide rail 2 and fixedly connected to a jacking cylinder 9, and the piston rod of the jacking cylinder 9 is connected to a push block 10 at the far end, and a push inclined surface is provided at the front end of the push block 10; 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 jacking base, and the lower end of the lifting block 11 is provided with a roller 13, and the roller 13 is rollingly connected to the push inclined surface; the intermediate support sleeve 8 is fixedly connected to the upper end of the lifting block 11.

[0027] The 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.

[0028] 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.

[0029] 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 .

[0030] In addition, a guide rail fixing device 31 for supporting the guide rail 2 through the rock mass is fixedly connected to 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 31 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 drilling rig 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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 stepping rock drill with a drill retracting device, comprising a rock drill main unit (1), a guide rail (2), and a drilling rig bearing slide (3), wherein a first locking device is provided between the drilling rig bearing slide (3) and the guide rail (2); characterized in that: The drilling rig carrying slide (3) is also provided with a drill retracting device; the drill retracting device comprises a locking slider (5) and a driving mechanism (6) having a reciprocating output motion, the driving mechanism (6) being connected between the drilling rig carrying slide (3) and the locking slider (5), the locking slider (5) being arranged on the drilling rig carrying slide (3) so as to be movable only longitudinally; the first locking device is arranged between the locking slider (5) and the guide rail (2); The 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); the base section (21) and the extension section (22) are connected via an inclined joint surface; the joint surface is gradually inclined 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 dislocated leftwardly and upwardly; The guide rail (2) comprises 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 comprises a positioning column (24) matched with 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 extension locking mechanism is an eccentric locking structure; the extension locking mechanism comprises 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), the buckle seat (29) is hinged on the handle (28), and a loading spring (30) is passed between the buckle seat (29) and the buckle (27); wherein a connecting rod (27a) is welded to one end of the buckle (27), and a guide block (27b) is welded to the free end of the connecting rod (27a); one end of the buckle seat (29) has a rod-shaped structure, and the buckle seat (29) is connected to the base section (21) by a rod-shaped structure. The end of the handle (28) is hingedly connected, the other end of the buckle seat (29) is a frame-shaped structure, the connecting rod (27a) extends into the frame from one end of the frame-shaped structure, and the frame walls on both sides of the frame-shaped structure are provided with sliding grooves (29a), and the guide block (27b) is slidably matched in the sliding grooves (29a); one end of the loading spring (30) abuts against the guide block (27b), and the other end abuts against 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 half shafts (8b); in the locked state, the hinge center of the 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).

2. The stepping rock drill with a drill retraction device according to claim 1, characterized in that: The driving mechanism (6) is composed of an oil cylinder.

3. The stepping rock drill with a drill retraction device according to claim 2, characterized in that: The drilling rig bearing slide (3) is provided with two opposing guide grooves through a protrusion, the locking slide block (5) is located between the two guide grooves, and guide portions that slidably cooperate with the guide grooves are formed on both sides of the locking slide block (5).

4. The stepping rock drill with a drill retraction device according to claim 3, characterized in that: The first locking device comprises a first locking cylinder (4) and a plurality of locking holes longitudinally distributed on the guide rail (2); a locking pin integrally formed on or fixedly connected to the piston rod of the first locking cylinder (4) cooperates with the locking hole to form a latch-type locking structure; and a long hole is formed on the drilling rig support slide (3) for the locking pin to translate along the guide groove.

5. The stepping rock drill with a drill retraction device according to any one of claims 1 to 4, characterized in that: The front end of the guide rail (2) is provided with a front end support sleeve (7) for supporting a drill rod, the middle section of the guide rail (2) is provided with an intermediate support sleeve (8), and the intermediate support sleeve (8) is arranged on the jacking device.

6. The stepping rock drill with a drill retraction device according to claim 5, characterized in that: The jacking device comprises a jacking base and a lifting block (11); the jacking base is arranged on the guide rail (2) and is fixedly connected to a jacking cylinder (9); the distal end of the piston rod of the jacking cylinder (9) is connected to a push block (10); the front end of the push block (10) is provided with a jacking inclined surface; the lifting block (11) can only be vertically lifted and lowered in the jacking cylinder (12); the jacking cylinder (12) is fixed on the jacking base; the lower end of the lifting block (11) is provided with a roller (13); the roller (13) is rollingly connected to the jacking inclined surface; the intermediate support sleeve (8) is fixedly connected to the upper end of the lifting block (11).

7. The walking rock drill with a drill retraction device according to any one of claims 1 to 4, characterized in that: A guide rail fixing device for supporting the guide rail (2) through a rock mass is fixedly connected to the lower front end of the guide rail (2).

8. The walking rock drill with a drill retraction device according to any one of claims 1 to 4, characterized in that: It also includes an air leg (14), and an air inlet pipeline (15) or an air outlet pipeline of the air leg (14) is provided with an electric switch valve (16) and an electric flow regulating valve (17) arranged in parallel.

Images