CN114893117A - Propulsion device and down-the-hole drill - Google Patents

Abstract

The invention discloses a propelling device and a down-the-hole drill, relates to the technical field of rock drilling equipment, and aims to improve the stress characteristic of the propelling device. The propulsion device comprises a propulsion beam assembly, a rock drill and a reel. The propulsion beam assembly comprises a steel beam, an aluminum alloy beam and a first connecting part; first connecting portion install in the first end of aluminum alloy roof beam, and the girder steel is fixed in the bottom of aluminum alloy roof beam. The rock drill is elevationally mounted to the feed beam assembly along the aluminum alloy beam. The reel is elevatably mounted to the pusher beam assembly along the aluminum alloy beam. According to the technical scheme, the stress characteristic of the push beam assembly is improved, the machining precision and the guiding precision of the aluminum alloy beam are guaranteed, and the failure rate of the push beam assembly is reduced; and the mass of the propelling beam component is light, the whole machine layout is easy, and the design and manufacturing cost is reduced.

Description

Propulsion device and down-the-hole drill

Technical Field

The invention relates to the technical field of rock drilling equipment, in particular to a propelling device and a down-the-hole drill.

Background

The down-the-hole drill belongs to the open-air rock drill, and is widely applied to the fields of mines, quarries, hydraulic engineering, railway and highway construction and the like. Rock drilling efficiency, borehole skewness, and mining costs are important evaluation parameters for down-the-hole drills.

The single hole forming depth of the down-the-hole drill is ten meters to dozens of meters, and the length of each drill rod is 2 meters to 5 meters, so the drill rods need to be continuously connected in the drilling process to ensure the drilling depth. In order to reduce the drilling auxiliary time and the consumption cost of the drilling tool and improve the rock drilling efficiency, the length of a drill rod is often expected to be increased, and the frequency of rod connection is reduced. The drill pipe is supported by the feed beam. Accordingly, the length of the feed beam is correspondingly increased.

From the practice of medium-length hole rock drilling in China, only 20% -30% of drill hole deflection rate is within 1%, 30% -50% of drill hole deflection rate is within 1% -2%, and a considerable part of drill hole deflection rate exceeds 2%. The drilling deflection is too large, so that the bottom spacing of blast holes is too large or too small, the blasting efficiency is influenced, the massive rate is increased, the stope boundary is not easy to control, the mining rate and the dilution rate are increased, the drilling depth is limited, and the mining cost is increased. Underground large-diameter deep hole drilling has strict requirements on the deflection of a drilling machine, and generally the requirement is not allowed to exceed 1%. The straightness of the guide rail of the propelling beam of the down-the-hole drill and the shock resistance and the running stability of the propelling system are one of the important factors directly influencing the inclination of the drilled hole.

The inventor finds that a steel structure propulsion beam is adopted in the related art. The steel structure propulsion beam has the following problems: the steel structure beam needs to be welded, the longer the length is, the greater the manufacturing difficulty is, the more obvious the defects of welding internal stress deformation, welding stress residue and the like are, and the lower the linear precision of the steel beam guide rail is. The problems can cause poor manufacturability of the propelling beam, the drilling precision is low, the perforation skewness of the drilling machine is improved, the rock drilling efficiency is influenced, meanwhile, the steel structure propelling beam is heavier, the whole machine layout is not easy, and the design and manufacturing cost is improved.

Disclosure of Invention

The invention provides a propelling device and a down-the-hole drill, which are used for improving the stress characteristic of the propelling device.

An embodiment of the present invention provides a propulsion device, including:

the propelling beam assembly comprises a steel beam, an aluminum alloy beam, a first connecting part and a second connecting part; the first connecting part is arranged at the first end of the aluminum alloy beam, and the second connecting part is arranged at the second end of the aluminum alloy beam; the steel beam is fixed on one side, far away from the aluminum alloy beam, of the second connecting part;

a rock drill elevatably mounted to the feed beam assembly along the aluminum alloy beam; and

a reel elevatably mounted to the push beam assembly along the aluminum alloy beam.

In some embodiments, the length of the steel beam is less than the length of the aluminum alloy beam.

In some embodiments the length of the aluminium alloy beam is greater than the maximum displacement of the rock drill along the aluminium alloy beam and also greater than the maximum displacement of the reel along the aluminium alloy beam.

In some embodiments, the aluminum alloy beam is extruded; and/or the steel beam is a whole beam.

In some embodiments, the first connection portion surrounds the first end of the aluminum alloy beam and is in abutting contact with an end face of the first end of the aluminum alloy beam; and/or the second connecting part surrounds the second end of the aluminum alloy beam and is in abutting contact with the end face of the second end of the aluminum alloy beam.

In some embodiments, the aluminum alloy beam is multi-deformed in cross-sectional shape, and the aluminum alloy beam has a through-hole in a middle portion thereof; and each corner of the outer contour of the aluminum alloy beam is provided with a convex V-shaped surface.

In some embodiments, the second connection portion comprises:

the sealing plate is abutted against the end face of the second end of the aluminum alloy beam;

the plates are fixedly connected with the sealing plate; each plate is positioned on the outer side of the aluminum alloy beam and on one side, far away from the steel beam, of the sealing plate; and

the clamping pieces are arranged in one-to-one correspondence with the V-shaped surface of the aluminum alloy beam and are positioned on the outer side of the V-shaped surface of the aluminum alloy beam; each clamping piece comprises a first V-shaped groove, and the first V-shaped groove is in abutting contact with the corresponding V-shaped surface; one plate is arranged between two adjacent clamping pieces.

In some embodiments, the second connection portion further comprises:

the connecting frame is fixedly connected with the sealing plate and/or the plate; the propulsion device further comprises a clamp assembly, and the clamp assembly is mounted on the connecting frame.

In some embodiments, the cross-sectional area of the sealing plate is greater than the cross-sectional area of the steel beam and the cross-sectional area of the sealing plate is greater than the cross-sectional area of the through-hole of the aluminum alloy beam; the sealing plate is fixed with the steel beam and the aluminum alloy beam through bolts.

In some embodiments, the propulsion device further comprises:

the first transmission mechanism comprises a first fixed pulley, a first steel wire rope and a movable pulley block; the first fixed pulley is arranged on one side, far away from the steel beam, of the sealing plate, and the first fixed pulley is located inside the through hole of the aluminum alloy beam; the movable pulley block is slidably arranged in the through hole of the aluminum alloy beam and is positioned on one side, away from the steel beam, of the first fixed pulley; one end of the first steel wire rope is fixedly connected with the sealing plate, and the other end of the first steel wire rope sequentially bypasses the movable pulley block and the first fixed pulley and then is fixedly connected with the rock drill; and

the telescopic cylinder comprises a cylinder barrel and a piston rod which is arranged on the cylinder barrel in a sliding manner; the telescopic cylinder is positioned in the through hole of the aluminum alloy beam; one of the cylinder barrel and the piston rod is fixedly connected with the first connecting part, and the other one of the cylinder barrel and the piston rod is fixedly connected with a support of the movable pulley block;

wherein the first transmission mechanism is configured to drive the rock drill to move from its top limit position towards its bottom limit position when the telescopic cylinder retracts the piston rod.

In some embodiments, the first transmission mechanism further comprises:

the support is fixed on the sealing plate, the support is located in the through hole of the aluminum alloy beam, and the first fixed pulley is installed on the support.

In some embodiments, the propulsion device further comprises:

the second transmission mechanism comprises a second fixed pulley, a second steel wire rope and the movable pulley block; the second fixed pulley is arranged on the first connecting part and is positioned outside the through hole of the aluminum alloy beam; one end of the second steel wire rope is fixedly connected with the cylinder barrel, and the other end of the first steel wire rope sequentially bypasses the movable pulley block and the second fixed pulley and is fixedly connected with the rock drill; wherein the second transmission mechanism is configured to drive the rock drill to move from its bottom limit position towards its top limit position when the telescopic cylinder extends the piston rod.

In some embodiments, the propulsion device further comprises:

the third transmission mechanism comprises a third steel wire rope, one end of the third steel wire rope is fixedly connected with the rock drill, and the other end of the third steel wire rope bypasses the reel and is fixedly connected with the outer wall of the aluminum alloy beam; the other end of the third steel wire rope is fixedly connected with the outer wall of the aluminum alloy beam and is positioned between the bottom surface of the rock drill and the steel beam; the third transmission mechanism is configured to drive the reel with the rock drill from a top limit position towards a bottom limit position of the reel itself when the telescopic cylinder retracts the piston rod.

In some embodiments, the propulsion device further comprises:

the fourth transmission mechanism comprises a fourth steel wire rope, one end of the fourth steel wire rope is fixedly connected with the top of the reel, and the other end of the fourth steel wire rope is fixedly connected with a support of the movable pulley block after bypassing the second fixed pulley; wherein the fourth transmission mechanism is configured to drive the reel to move from the bottom limit position to the top limit position of the reel along with the movable pulley block when the telescopic cylinder extends out of the piston rod.

In some embodiments, the set of running pulleys comprises:

the support is arranged in the through hole of the aluminum alloy beam in a sliding manner;

the first movable pulley is rotatably arranged on the support, and the first steel wire rope is wound on the first movable pulley; and

the second movable pulley is rotatably arranged on the support and is positioned on one side, far away from the steel beam, of the first movable pulley; the second steel wire rope is wound on the second movable pulley.

In some embodiments, at least two oppositely arranged guide grooves are arranged on the inner wall of the through hole; the support is correspondingly provided with two guide tables; the guide platforms are correspondingly positioned in the guide grooves.

In some embodiments, the first connection portion comprises:

each clamping block comprises a second V-shaped groove, and the clamping blocks correspond to each corner of the outer contour of the aluminum alloy beam one by one; the second V-shaped groove is in surface-to-surface contact with the V-shaped surface; and

the connecting piece is fixedly connected with the top of the aluminum alloy beam; the connecting pieces are arranged in pairs, and each connecting piece is fixedly connected with two clamping blocks; and

the end plate is abutted against the end face of the first end of the aluminum alloy beam and is fixedly connected with the connecting piece; the second fixed pulley is mounted to the end plate.

In some embodiments, the first connection portion further comprises:

the mounting seat is positioned at the first end of the aluminum alloy beam and positioned on the side surface of the aluminum alloy beam; the mounting seat is fixedly connected with the connecting piece.

In some embodiments, the rock drill includes a third V-shaped groove, the third V-shaped groove abutting the V-shaped face; and/or the presence of a gas in the gas,

and the fourth V-shaped groove of the reel is attached to the V-shaped surface.

The embodiment of the invention also provides a down-the-hole drill which comprises a drill rod and the propelling device provided by any technical scheme of the invention; one end of the drill rod is mounted to the rock drill.

The advancing device that above-mentioned technical scheme provided has changed the structure of propulsion roof beam subassembly from the principle, divides the propulsion roof beam subassembly into girder steel, aluminum alloy roof beam and the three independent part of first connecting portion. The steel beam and the first connecting part play a bearing role, and the aluminum alloy beam only guides and does not bear. The stress characteristic of the push beam assembly is greatly improved, the processing precision and the guiding precision of the aluminum alloy beam are ensured, and the failure rate of the push beam assembly is reduced; and the mass of the propelling beam component is light, the whole machine layout is easy, and the design and manufacturing cost is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic view of an installation state of a propulsion device according to an embodiment of the present invention.

Fig. 2 is a partially enlarged schematic view of a in fig. 1.

Fig. 3 is a schematic connection relationship diagram of the push beam assembly, the first connection portion, and the second connection portion according to the embodiment of the present invention.

Fig. 4 is an enlarged schematic view of a portion B of fig. 3 at the first connection portion.

Fig. 5 is an enlarged schematic view corresponding to another viewing angle at B of fig. 3.

Fig. 6 is an enlarged schematic view corresponding to a further viewing angle at B of fig. 3.

Fig. 7 is a partially enlarged view of C of fig. 3.

Fig. 8 is a partially enlarged view of D of fig. 3.

Fig. 9a is a schematic structural view of an aluminum alloy beam of a propulsion beam assembly of a propulsion device according to an embodiment of the present invention.

Fig. 9b is a schematic cross-sectional view of fig. 9 a.

Fig. 10 is a perspective view of a propulsion beam assembly of a propulsion device according to an embodiment of the present invention at a second connection portion.

Fig. 11 is a further perspective view of a propulsion beam assembly of a propulsion device according to an embodiment of the present invention at a second connection portion.

Fig. 12 is another perspective view of a propulsion beam assembly of a propulsion device according to an embodiment of the present invention at a second connection portion.

Fig. 13 is a schematic view of the connection between the steel beam and the first fixed pulley of the propulsion beam assembly of the propulsion device according to the embodiment of the present invention.

Fig. 14 is a schematic view of various transmission mechanisms of a propulsion device according to an embodiment of the present invention.

Fig. 15 is a schematic view of a rock drill and reel of a propulsion device according to an embodiment of the present invention in a top end extreme position.

Fig. 16 is a schematic view of a rock drill and a reel of a propulsion device according to an embodiment of the invention in a bottom end limit position.

Fig. 17 is a schematic structural diagram of a movable pulley block of the propulsion device according to the embodiment of the invention.

Fig. 18 is a schematic view showing the connection relationship between the clamp assembly and the drill rod of the propulsion device according to the embodiment of the present invention.

Fig. 19 is a schematic view of the combination of a rock drill and an aluminum alloy beam of the propulsion device according to the embodiment of the present invention.

Fig. 20 is a schematic view of the reel and the aluminum alloy beam of the propulsion device according to the embodiment of the present invention.

Reference numerals:

1. a pusher beam assembly; 2. a rock drill; 3. coiling; 4. a first transmission mechanism; 5. a telescopic cylinder; 6. a second transmission mechanism; 7. a third transmission mechanism; 8. a fourth transmission mechanism; 10. a clamp assembly;

11. a steel beam; 12. an aluminum alloy beam; 13. a first connection portion; 14. a second connecting portion; 131. a clamping block; 132. a connecting member; 133. an end plate; 134. a mounting seat; 15. gear shaping weldment; 120. a through hole; 120a, a guide groove; 121. a V-shaped surface; 122. a wear plate; 143a, a first V-shaped groove; 131a, a second V-shaped groove;

41. a first fixed pulley; 42. a first wire rope; 43. a movable pulley block; 44. a support; 431. a support; 432. a first movable pulley; 433. a second movable pulley; 431a, a guide table;

51. a cylinder barrel; 52. a piston rod;

61. a second fixed pulley; 62. a second wire rope; 63. a fixed pulley seat;

71. a third wire rope;

81. a fourth wire rope;

141. closing the plate; 142. a plate member; 143. a clamping member; 144. a connecting frame;

100. a drill boom; 200. an oil cylinder; 300. a carriage; 400. and (5) drilling a rod.

Detailed Description

The technical solution provided by the present invention will be explained in more detail with reference to fig. 1 to 20.

In the present text, the top and bottom directions are referred to the drilling operation state of the down-the-hole drill, the top part is far away from the ground and the bottom part is near the ground during the drilling operation.

Referring to fig. 1, an embodiment of the present invention provides a propulsion device comprising a propulsion beam assembly 1, a rock drill 2 and a reel 3. The push beam assembly 1 includes a steel beam 11, an aluminum alloy beam 12, a first connection portion 13, and a second connection portion 14. The first connecting portion 13 is attached to a first end of the aluminum alloy beam 12, i.e., a top end in drilling work. The second connecting portion 14 is mounted to a second end of the aluminum alloy beam 12. The steel beam 11 is fixed to an end of the second connection portion 14 away from the aluminum alloy beam 12, i.e., a bottom end in the drilling operation. The rock drill 2 is elevationally mounted to the feed beam assembly 1 along the aluminium alloy beam 12. The reel 3 is mounted to the feed beam assembly 1 to be liftable along the aluminum alloy beam 12.

The push beam assembly 1 is divided into a first connecting portion 13, an aluminum alloy beam 12, a second connecting portion 14 and a steel beam 11 along the length direction thereof. And first connecting portion 13 and the first end fixed connection of aluminum alloy roof beam 12, the first end fixed connection of girder steel 11 and aluminum alloy roof beam 12.

The aluminium alloy beam 12 acts as a guide member to provide linear guidance for the raising and lowering movements of the rock drill 2 and the reel 3. The aluminum alloy beam 12 can be obtained by extrusion molding, specifically, by hot extrusion integral molding of hard aluminum alloy or other integral molding methods.

The cross section of the aluminum alloy beam 12 is a box-shaped cross section, and the shape of the cross section is a multi-deformation, such as a rectangle, and the like, as shown in fig. 9a and 9 b. The cross-sectional profile of the aluminium alloy beam 12 is closed and it is centrally provided with a through hole 120 running through its length. The aluminum alloy beam 12 has no opening in all of its four side directions, and the aluminum alloy beam 12 has openings only in its first and second end ends. The through hole 120 of the aluminum alloy beam 12 is used for accommodating the movable pulley block 43, the telescopic cylinder 5, the bracket 44 and the like which are described later. The cross section of the through hole 120 of the aluminum alloy beam 12 is substantially rectangular, and two guide grooves 120a are provided in opposition to each other on the inner wall of the through hole 120 of the aluminum alloy beam 12. The guide groove 120a is an inner groove. The guide groove 120a is located in a region where the aluminum alloy beam 12 has a smaller wall thickness than other regions where the guide groove 120a is not provided. The guide groove 120a is a linear groove extending along the longitudinal direction of the aluminum alloy beam 12. The length of the guide groove 120a is greater than or equal to the displacement of the movable pulley block 43 described later. The guide groove 120a cooperates with a guide platform 431a of a support 431 described later to guide the movable pulley block 43 and support the piston rod 52 of the telescopic cylinder 5, thereby reducing or even avoiding instability of the piston rod 52 when the piston rod 52 extends for a long distance. The linear movement of the movable pulley block 43 drives the rock drilling machine 2 and the reel 3 to synchronously and linearly move, and the drill rod connected with the rock drilling machine 2 synchronously and linearly moves. The linear displacement of the movable pulley block 43 is proportional to the stroke of the rock drill 2.

Moreover, the aluminum alloy beam 12 is formed by extrusion and integral molding, is a whole beam, and does not need to be spliced by a plurality of beams. In actual production, the aluminum alloy beam 12 with the required length is cut out as required to meet the stroke of a single drill rod. On one hand, the down-the-hole drill can be developed towards deeper drilling depth, and the drilling precision of large-depth drilling and the drilling efficiency can be improved with less rod replacement frequency. The depth of the borehole is theoretically related to the push-pull capacity of the rock drilling machine 2 and the number of drill rods 400. Taking a product of five-meter-level drill rods as an example, the aperture of the medium-sized drilling machine is 115 mm-152 mm, the maximum economic depth of drilling is about 35 meters, and the down-the-hole drilling machine needs to connect 7 drill rods with the length of 5 meters in sequence.

Referring to fig. 9b, and referring to fig. 4 to 6, since the cross section of the aluminum alloy beam 12 is substantially rectangular, the outer contour of the aluminum alloy beam 12 has four corners. At each corner, a convex V-shaped face 121 is provided. The V-shaped surface 121 extends along the length of the aluminum alloy beam 12 from the top of the aluminum alloy beam 12 to the bottom of the aluminum alloy beam 12. In some embodiments, a wear plate 122 is secured to the exterior of the V-shaped face 121.

The wear plate 122 is a stainless steel protective skin. There is relative movement between the rock drilling machine 2, the reel 3 and the aluminium alloy beam 12 so that the parts of the V-shaped face 121 that are within the respective stroke of the rock drilling machine 2, the reel 3 are provided with wear plates 122. The wear plate 122 protects the aluminium alloy beam 12 from damage due to movement of the rock drilling machine 2, the reel 3.

Since the first and second coupling portions 13 and 14 do not move relative to the aluminum alloy beam 12, the wear plate 122 does not need to be disposed at the portions of the V-shaped surface 121 corresponding to the first and second coupling portions 13 and 14.

In the above manner, the connection strength of the first connection portion 13 and the second connection portion 14 described later to the aluminum alloy beam 12 is sufficient, and the aluminum alloy beam 12 does not bear the stress of the first connection portion 13 and the second connection portion 14.

The entire aluminum alloy beam 12 is integrally extruded, and the V-shaped faces 121 and the guide grooves 120a are formed in the hot extrusion process. By adopting the mode, all parts of the aluminum alloy beam 12 can be processed at one time, no additional processing step is needed, the manufacturing process of the aluminum alloy beam 12 is optimized, and on the other hand, the processed aluminum alloy beam 12 has very high quality and very good linearity.

Referring to fig. 19, in some embodiments the rock drill 2 includes a third V-shaped groove 2a, the third V-shaped groove 2a abutting the V-shaped face 121. The third V-shaped groove 2a may be provided in plural, for example, four, to be fitted with the four V-shaped faces 121 of the outer surface of the aluminum alloy beam 12 one by one. By the cooperation of the third V-shaped groove 2a and the V-shaped surface 121, the rock drill 2 can be linearly moved along the outer surface of the aluminum alloy beam 12 with high accuracy.

Referring to fig. 20, in some embodiments, the spool 3 includes a fourth V-shaped groove 3a, the fourth V-shaped groove 3a conforming to the V-shaped surface 121. The fourth V-shaped groove 3a may be provided in plural number, for example, four, to fit one by one with the four V-shaped faces 121 of the outer surface of the aluminum alloy beam 12. The spool 3 can be linearly moved along the outer surface of the aluminum alloy beam 12 with high accuracy by the fitting of the fourth V-shaped groove 3a with the V-shaped surface 121.

According to the technical scheme, the moving straightness of the rock drilling machine 2 and the movement straightness of the reel 3 are improved, and the drill rod 400 is fixedly connected with the rock drilling machine 2, so that the straightness of drilling operation of the drill rod is guaranteed, the drilling deflection is reduced, and the running stability of the propelling device is improved.

In some embodiments the length of the aluminium alloy beam 12 is greater than the maximum displacement of the rock drilling machine 2 along the aluminium alloy beam 12 and greater than the maximum displacement of the reel 3 along the aluminium alloy beam 12 to ensure that both the rock drilling machine 2 and the reel 3 can move completely along the aluminium alloy beam 12 to the displacement required to complete the drilling operation.

Referring to fig. 10, the steel beam 11 and the aluminum alloy beam 12 are separate two members. The two parts are fixedly connected, for example, by a screw thread. The steel beam 11 may be a rectangular pipe, a square pipe, or a welded plate, i.e., the cross section of the steel beam 11 may be circular, square, rectangular, etc. One end of the steel beam 11 is fixed with the aluminum alloy beam 12 by bolts, and the other end of the steel beam 11 is welded (or fixed by bolts) with a gear shaping weldment 15. The steel beam 11 is a mounting member of a first fixed sheave 41 described later. The force applied by the first fixed pulley 41 to the push beam assembly 1 is borne by the steel beam 11, the middle portion of the aluminum alloy beam 12 is not borne, and only the end portion of the aluminum alloy beam 12 is borne, as will be explained in detail later.

Girder steel 11 and first connecting portion 13 are the steel, and girder steel 11's bearing characteristic is good. The aluminum alloy beam 12 has good guiding performance, so that the guiding function and the bearing function of the propulsion beam assembly 1 can be considered.

With continued reference to fig. 10, in some embodiments, the push beam assembly 1 further comprises a closing plate 141, the closing plate 141 being located between the aluminum alloy beam 12 and the steel beam 11, the closing plate 141 having a cross-sectional area larger than that of the steel beam 11, and the closing plate 141 having a cross-sectional area larger than that of the through-hole 120 of the aluminum alloy beam 12; the closing plate 141 is fixed with the steel beam 11 and the aluminum alloy beam 12 by bolts.

The cover plate 141 may be made of a material having a high load-bearing capacity, such as steel. In some embodiments, plate 141 is made of the same material as beam 11. The cover plate 141 is a flat plate. The closing plate 141 is located outside the through hole 120 of the aluminum alloy beam 12, i.e., the closing plate 141 does not protrude into the through hole 120 of the aluminum alloy beam 12. The closing plate 141 fixedly connects the aluminum alloy girder 12 and the steel girder 11.

In some embodiments, the length of steel beam 11 is less than the length of aluminum alloy beam 12.

In some embodiments, steel beam 11 is a full beam. The steel beam 11 is very short and does not need to adopt a structure in which a plurality of beams are spliced and welded. The length of steel beam 11 can already play a role in installing the first fixed pulley 41, the gear shaping weldment 15 and fixing the aluminum alloy beam 12 by bolts, and can effectively bear the acting force applied to the steel beam 11 by the components.

Referring to fig. 2-5, in some embodiments, the first connection portion 13 includes a connection member 132, a plurality of clamping blocks 131, and an end plate 133. Each of the clamping blocks 131 has a second V-shaped groove 131a, and the clamping blocks 131 correspond one-to-one to each corner of the outer contour of the aluminum alloy beam 12. The second V-shaped groove 131a is in surface-to-surface contact with the V-shaped surface 121. The connecting member 132 is fixedly connected to the top of the aluminum alloy beam 12. The connecting members 132 are arranged in pairs, and each connecting member 132 fixedly connects two clamping blocks 131.

The connecting member 132 is specifically a flat plate, for example. The length of the connecting member 132 is much shorter than the length of the aluminum alloy beam 12. Two connecting members 132 are stopped outside both side surfaces of the aluminum alloy beam 12. The two connecting members 132 are arranged symmetrically with respect to the central axis of the aluminum alloy beam 12. The connecting member 132 and the aluminum alloy beam 12 are fixed by bolts. Each connecting member 132 corresponds to two clamping blocks 131, and the connecting member 132 is located between the two clamping blocks 131. The connecting member 132 and the two clamping blocks 131 are fixed by bolts.

Each clamping block 131 is, for example, a nylon block, and four clamping blocks 131 are attached to four V-shaped surfaces 121 in a surrounding manner, and one clamping block 131 is wrapped outside each V-shaped surface 121. The length of the clamping blocks 131 is the same as that of the connecting pieces 132, and is smaller than that of the aluminum alloy beam 12.

With continued reference to fig. 4-6, in some embodiments, the first connection portion 13 further includes a mount 134, the mount 134 being located at a first end of the aluminum alloy beam 12 and at a side of the aluminum alloy beam 12; the mounting seat 134 is located between the two connecting members 132, and the mounting seat 134 is fixedly connected with the connecting members 132. The mount 134 includes a mounting plate 134a fixedly connected to the two connectors 132 and two hinge eyes 134b fixed to the mounting plate. One end of the cylinder 200 is attached to the hinge lug 134b, and the other end of the cylinder 200 is attached to the carriage 300, as shown in fig. 1.

With continued reference to fig. 4-6, in some embodiments, end plate 133 is positioned outside of the first end of aluminum alloy beam 12, and end plate 133 blocks the end of the first end of through-hole 120 of aluminum alloy beam 12. The end plate 133 is fixedly connected with the connecting piece 132 and the mounting seat 134. The end plate 133, the connecting member 132, and the plurality of clamping blocks 131 cooperate to enclose the first end of the aluminum alloy beam 12. Also, the end plate 133 may abut against the first end face of the aluminum alloy beam 12. The above structure makes the side surface of the aluminum alloy beam 12 bear no load, and only the end surface of the aluminum alloy beam 12 bears the force along the length direction (i.e., axial direction) thereof. The first connecting portion 13 that above-mentioned technical scheme provided has changed the bearing mode of aluminum alloy roof beam 12 for the first end of aluminum alloy roof beam 12 has realized bearing axial direction's power only. The first connecting portion 13 is matched with a second connecting portion 14 which is described later, and the second connecting portion 14 enables the bottom end of the aluminum alloy beam 12 to bear the force in the axial direction only, so that the whole aluminum alloy beam 12 is not born in the middle part and only bears on two end faces of the first end and the second end, and the bearing characteristic of the aluminum alloy beam 12 is greatly improved. Because the side surface of the aluminum alloy beam 12 has no local stress concentration phenomenon and the side surface of the aluminum alloy beam 12 has almost no bearing, the V-shaped surface 121 of the aluminum alloy beam 12 has no distortion and deformation, thereby greatly improving the straightness of the rock drill 2, ensuring the straightness of the drill rod action and reducing the drilling deflection rate.

The clamping blocks 131, the connecting pieces 132, the mounting seats 134 and the end plates 133 of the first connecting parts 13 together play a role in changing and improving the stress mode of the aluminum alloy beam 12. And the first connecting portion 13 is also used for mounting the second fixed sheave 61 described later and the oil cylinder 200 described later. The acting force that second fixed pulley 61 applyed to first connecting portion 13 is born by first connecting portion 13, can not transmit the side to aluminum alloy roof beam 12, and aluminum alloy roof beam 12 is difficult for warping because of local atress, so effectively guaranteed aluminum alloy roof beam 12 to the guide effect of 2 linear displacement of rock drill, guaranteed the straightness accuracy of 2 displacements of rock drill.

As can be seen from the above analysis, in the propulsion device provided in the embodiment of the present invention, the movement of the rock drilling machine 2 and the reel 3 is realized by the first fixed pulley 41, the second fixed pulley 61 and the movable pulley block 43 described later, the force applied to the first fixed pulley 41 is borne by the first connecting portion 13 and the end face of the aluminum alloy beam 12, the force applied to the second fixed pulley 61 is borne by the second connecting portion 14 and the end face of the aluminum alloy beam 12, and the aluminum alloy beam 12 is not borne.

Referring to fig. 1 and 18, in some embodiments, the advancement device further comprises a second coupling portion 14 and a clamp assembly 10. The second connecting portion 14 is attached to the bottom outer side of the aluminum alloy beam 12. The clamp assembly 10 is mounted to the second connection portion 14.

The second connecting portion 14 includes a closing plate 141, a connecting frame 144, a plurality of plate members 142, and a plurality of clamping members 143. The closing plate 141 abuts against the end face of the second end of the aluminum alloy beam 12. Each plate member 142 is fixedly connected to the cover plate 141. The plurality of clamping pieces 143 are arranged in one-to-one correspondence with the V-shaped surface 121 of the aluminum alloy beam 12 and are located outside the V-shaped surface 121 of the aluminum alloy beam 12. Each clamping piece 143 comprises a first V-shaped groove 143a, and the first V-shaped grooves 143a are in abutting contact with the corresponding V-shaped surfaces 121; one plate member 142 is disposed between adjacent two of the clamping members 143. The connecting bracket 144 is fixedly connected to the cover plate 141 and/or the plate member 142. The clamp assembly 10 is mounted to the attachment frame 144.

The clamping member 143 is similar to the clamping block 131 described above and is used to enclose the V-shaped surface 121 of the second end of the aluminum alloy beam 12. The closing plate 141 abuts against the end face, specifically the bottom end face, of the other end of the aluminum alloy beam 12. The plurality of plate members 142 are arranged symmetrically with respect to the central axis of the aluminum alloy beam 12. The attachment frame 144 is used to mount the clamp assembly 10. The connection mode ensures that the relative position of the clamp assembly 10 and the drill rod 400 is accurate, and when the drill rod 400 needs to be disassembled, the operation force can be accurately and reliably applied to the drill rod 400, so that the rod disassembling efficiency is improved, and the drill rod 400 and the rock drill 2 are prevented from being damaged; clamp assembly 10 does not interfere with the normal operation of drill rod 400 during drilling operations.

The jaw assembly 10 includes a first jaw 101 and a second jaw 102, the second jaw 102 being rotatable relative to the first jaw 101. Drill pipe 400 comprises a plurality of sections, a first drill pipe 401 at the bottom and a second drill pipe 402 at the top, where the top and bottom are referenced to the direction of the drilling operation. When the drill rod is broken out: the first clamp 101 clamps the first drill pipe 401, the second clamp 102 clamps the second drill pipe 402, and the second clamp 102 rotates relative to the first clamp 101, so that the thread between the first drill pipe 401 and the second drill pipe 402 is loosened, and the rod unloading action is completed. At this time, since the second connecting portion 14 is disposed at the lower end of the aluminum alloy beam 12 in a surrounding manner, and the jaw assembly 10 is mounted on the plate surface of the second connecting portion 14, the breaking force generated by the second jaw 102 is reliably transmitted to the four V-shaped surfaces 121 of the aluminum alloy beam 12.

At the bottom of clamp assembly 10 is fixed a centralizer that ensures that drill pipe 400 does not deflect to reduce the degree of deflection.

The following describes how the movement of the rock drilling machine 2, respectively the reel 3, relative to the aluminium alloy beam 12 is achieved. First, in order to distinguish the respective wire ropes, the following explanation is made: in fig. 15 and 16, the first wire rope 42 is indicated by a solid line. The second wire rope 62 is indicated by a dot-dash line, the third wire rope 71 is indicated by a long-dashed line, and the fourth wire rope 81 is indicated by a dot-dashed line.

Referring to fig. 14-16, in some embodiments, the propulsion device further comprises a first transmission 4 and a telescoping cylinder 5. The first transmission mechanism 4 includes a first fixed pulley 41, a first wire rope 42, and a movable pulley group 43. The first fixed pulley 41 is installed on one side of the sealing plate 141 away from the steel beam 11, and the first fixed pulley 41 is located inside the through hole 120 of the aluminum alloy beam 12. The movable pulley block 43 is slidably mounted in the through hole 120 of the aluminum alloy beam 12, and the movable pulley block 43 is located on the side of the first fixed pulley 41 away from the steel beam 11. One end A1 of the first wire rope 42 is fixedly connected with the closing plate 141, and the other end A2 of the first wire rope 42 is sequentially wound around the movable pulley block 43 and the first fixed pulley 41 and then fixedly connected with the rock drilling machine 2.

A specific installation diagram of the first fixed pulley 41 is shown in fig. 13. In some embodiments, the first transmission mechanism 4 further includes a bracket 44, the bracket 44 is fixed to the closing plate 141, the bracket 44 is located in the through hole 120 of the aluminum alloy beam 12, and the first fixed pulley 41 is mounted on the bracket 44. The bracket 44 is a U-shaped plate, and the open end of the U-shaped plate is fixedly connected with the closing plate 141, and may be welded or bolted. The first fixed pulley 41 is rotatably mounted about its axis in an opening of the bracket 44. One end of the first cable 42 is secured to the top of the bracket 44. The other end of the first wire rope 42 sequentially rounds the first movable pulley 432 of the movable pulley block 43 and the first fixed pulley 41 and then is fixedly connected with the bottom of the rock drilling machine 2.

Specifically, an enlarged schematic view of the movable pulley block 43 is shown in fig. 7, and a schematic diagram is shown in fig. 17. In some embodiments, the movable pulley group 43 includes a support 431, a first movable pulley 432, and a second movable pulley 433. The mount 431 is slidably mounted in the through hole 120 of the aluminum alloy beam 12. The first movable sheave 432 is rotatably mounted on the bracket 431, and the first wire rope 42 is wound around the first movable sheave 432. The second movable pulley 433 is rotatably mounted on the support 431, and the second movable pulley 433 is positioned on one side of the first movable pulley 432 away from the steel beam 11; the second wire rope 62 is wound around the second movable sheave 433. In some embodiments, the inner wall of the through hole 120 of the aluminum alloy beam 12 is provided with at least two oppositely arranged guide grooves 120 a. The support 431 is correspondingly provided with two guide stands 431 a. The guide steps 431a are located in the guide grooves 120a in one-to-one correspondence. Through the cooperation of the guide platform 431a and the guide groove 120a described above, the movable pulley block 43 is guided, and the piston rod 52 of the telescopic cylinder 5 described below is supported, so that the instability phenomenon of the piston rod 52 when the piston rod extends for a long distance is reduced or even avoided.

The telescopic cylinder 5 includes a cylinder tube 51 and a piston rod 52 slidably mounted to the cylinder tube 51. The telescopic cylinder 5 is located in the through hole 120 of the aluminum alloy beam 12. One of the cylinder 51 and the piston rod 52 is fixedly connected to the first connecting portion 13, and the other is fixedly connected to the support 431 of the movable pulley block 43.

Wherein the first transmission mechanism 4 is configured to drive the rock drilling machine 2 from its top extreme position towards its bottom extreme position when the telescopic cylinder 5 retracts the piston rod 52.

Fig. 15 shows the rock drilling machine 2 in a top extreme position and fig. 16 shows the rock drilling machine 2 in a bottom extreme position.

The first gear 4 is used to effect lowering of the rock drilling machine 2. That is, in the process of shifting from the state illustrated in fig. 15 to the state illustrated in fig. 16, the first transmission mechanism 4 is activated and the second transmission mechanism 6 is deactivated. The specific process is as follows: the piston rod 52 of the telescopic cylinder 5 is contracted and the support 431 of the movable pulley block 43 fixedly connected to the piston rod 52 moves upward in synchronization, so that the first wire rope 42 wound around the first movable pulley 432 of the movable pulley block 43 moves upward in synchronization. Since the length of the first wire rope 42 is constant, moving one end of the first wire rope 42 upward will cause the other end of the first wire rope 42 to descend. The rock drilling machine 2 fixedly connected to the other end of the first wire line 42 is also lowered in synchronism towards its bottom end limit position. The first transmission mechanism 4 adopts a steel wire rope for transmission, so that the impact resistance of the propelling device is greatly improved.

With continued reference to fig. 14-16, in some embodiments, the propulsion device further includes a second transmission 6. The second transmission mechanism 6 comprises a second fixed pulley 61, a second steel wire rope 62 and a movable pulley block 43; the second fixed pulley 61 is mounted to the first connecting portion 13, and the second fixed pulley 61 is located outside the through hole 120 of the aluminum alloy beam 12.

As shown in fig. 6, the second fixed sheave 61 is located outside the top of the aluminum alloy beam 12 and fixed to the end plate 133. The number of the second fixed pulleys 61 is two. The two second fixed pulleys 61 are fixedly attached to the end plate 133 by fixed pulley holders 63. Both second fixed pulleys 61 are mounted to a fixed pulley block mount 63 using bearings and a pin 64. The second fixed pulley 61 can rotate around its own axis, i.e., the axis of the pin 64.

One end B1 of the second wire rope 62 is fixedly connected with the cylinder 51, in particular, fixed to the bottom end of the cylinder 51. The other end B2 of the second wire rope 62 sequentially rounds the movable pulley block 43 and the second fixed pulley 61 and then is fixedly connected with the rock drilling machine 2, and is specifically fixed at the top end of the rock drilling machine 2. The top and bottom are referred to herein as the direction of drilling. Wherein the second transmission 6 is configured to drive the rock drilling machine 2 from its bottom extreme position towards its top extreme position when the telescopic cylinder 5 extends the piston rod 52.

The second transmission 6 is used to carry out the raising process of the rock drilling machine 2. That is, in the process of shifting from the state illustrated in fig. 16 to the state illustrated in fig. 15, the second transmission mechanism 6 is activated and the first transmission mechanism 4 is deactivated. The specific process is as follows: the piston rod 52 of the telescopic cylinder 5 is extended and moved downwards in synchronism with the seat 431 of the movable pulley block 43 fixedly coupled to the piston rod 52, and then since one end of the second wire rope 62 is fixed to the cylinder 51, the end is not moved. The movable pulley block 43 will pull one end of the second wire rope 62 to move synchronously. Due to the fact that the movable pulley block 43 has the effect of changing the direction of movement, the rock drilling machine 2, which is fixedly connected to the other end of the second wire rope 62, is also raised in a synchronized manner and moved towards its own top end limit position. The second transmission mechanism 6 adopts a steel wire rope for transmission, and the impact resistance of the propulsion device can be greatly improved.

With continued reference to fig. 14-16, in some embodiments, the propulsion device further comprises a third transmission 7. The third transmission mechanism 7 includes a third wire rope 71. One end C1 of the third steel wire rope 71 is fixedly connected with the rock drill 2, and the other end of the third steel wire rope is fixedly connected with the outer wall of the aluminum alloy beam 12 by winding the reel 3; the position where the other end C2 of the third steel wire rope 71 is fixedly connected with the outer wall of the aluminum alloy beam 12 is located between the bottom surface of the rock drill 2 and the steel beam 11; the third transmission 7 is configured to drive the reel 3 with the rock drilling machine 2 from the top limit position towards the bottom limit position of the reel 3 itself when the telescopic cylinder 5 retracts the piston rod 52.

The third gear 7 is used to effect lowering of the reel 3, i.e. from the state of fig. 15 to the state of fig. 16. During this time, the fourth gear mechanism 8 is deactivated. One end of the third wire line 71 is fixed and the other end moves with the rock drilling machine 2. Third wire rope 71 is passed around reel 3. When the rock drilling machine 2 is lowered, the third wire rope 71 drives the reel 3 to also be lowered. During lowering of the rock drilling machine 2, the fourth wire rope 81, described later, moves upwards with the movable pulley block 43 and therefore does not act as a stop for the reel 3. The third transmission mechanism 7 adopts a steel wire rope for transmission, and the impact resistance of the propelling device can be greatly improved.

With continued reference to fig. 14-16, in some embodiments, the propulsion device further includes a fourth transmission 8, the fourth transmission 8 includes a fourth cable 81, and one end D1 of the fourth cable 81 is fixedly connected to the top of the reel 3. The other end D2 of the fourth wire rope 81 is wound around the second fixed pulley 61 and then fixedly connected to the support 431 of the movable pulley block 43, specifically to the top of the support 431. Wherein the fourth transmission mechanism 8 is configured to drive the reel 3 to move from the bottom limit position towards the top limit position of the reel 3 itself with the movable pulley group 43 when the telescopic cylinder 5 extends the piston rod 52.

The fourth gear 8 is used to effect the raising of the reel 3, i.e. from the condition of fig. 16 to the condition of fig. 15. During this time, the third transmission 7 is inactive. One end of the fourth wire rope 81 is fixed and the other end moves with the rock drilling machine 2. The fourth wire rope 81 is wound around the reel 3. When the rock drilling machine 2 is lowered, the third wire rope 71 drives the reel 3 to also be lowered. The first transmission mechanism 8 is also driven by a steel wire rope, so that the impact resistance of the propelling device is greatly improved.

The first transmission mechanism 4, the second transmission mechanism 6, the third transmission mechanism 7 and the fourth transmission mechanism 8 are driven by the same telescopic cylinder 5, and the driving action is stable and reliable.

The raising process of the rock drill 2 and the raising process of the reel 3 are synchronized; the lowering of the rock drilling machine 2 and the lowering of the reel 3 are also synchronized.

According to the technical scheme, the first fixed pulley 41, the movable pulley block 43 and the second fixed pulley 61 are mounted in the above mounting mode and structure, even if the down-the-hole hammer is frequently vibrated and impacted during working, the working condition is severe, and the local part of the aluminum alloy beam 12 cannot bear large-tonnage propelling, lifting, twisting and other complex loads, so that the aluminum alloy beam 12 is not easy to wear and tear and cannot crack, the strength of the aluminum alloy beam 12 is sufficient, the bearing characteristic of the propelling beam assembly 1 is greatly improved, and the propelling device can be better suitable for medium and large-sized aperture and medium and deep length drilling.

In addition, according to the technical scheme, the steel wire rope transmission mechanism is adopted, so that the system is good in impact resistance and stable in operation. Because the down-the-hole drilling operation has higher requirement on the control precision of the propelling force, the steel wire rope transmission mechanism is not easy to be attached with mine dust and is not easy to be abraded, and the replacement and the maintenance are more convenient.

The embodiment of the invention also provides a down-the-hole drill which comprises a drill rod and the propelling device provided by any technical scheme of the invention.

The down-the-hole drill belongs to the open-air rock drilling machine, the bottom end of a drill rod 400 of the down-the-hole drill is provided with an impactor, the impactor is connected with a drill bit, and the impactor is used for impacting the drill bit to drill holes. The working principle of the down-the-hole drill is that compressed air drives a drill rod to break rock, rock debris in a hole is discharged, and meanwhile, the down-the-hole drill is assisted with rotation and propulsion to achieve a drilling function. Rock drilling efficiency, borehole skewness, mining costs are important performance parameters of down-the-hole drilling rigs, all of which are related to the movement of the drill pipe.

The single hole forming depth of the down-the-hole drill is ten meters to dozens of meters, the drill rod 400 is a long-specification drill rod, and the length of the propelling beam assembly is more than 10 meters.

One end of the drill rod 400 is mounted to the rock drill 2, specifically: the thread at one end of the topmost drill rod 400 is screwed into the bottom end of the rock drilling machine 2 (here the bottom end of the rock drilling machine 2 during drilling operations), the bottom end of this drill rod 400 being connected to another drill rod 400, and so on, until the total length of all drill rods 400 meets the drilling requirements.

During drilling, it is necessary to continue drilling rod 400, and clamp assembly 10 is used to continue drilling rod 400 and break out drilling rod 400.

Drill pipe 400 is drivingly connected to the propulsion device. The drilling operation is a compound motion of the reciprocating linear motion of drill rod 400 driven by the propulsion device and the rotation of drill rod 400 about its own axis. For a relatively long drill pipe 400, one end of drill pipe 400 is mounted to aluminum alloy beam 12 of the propulsion unit and the other end of drill pipe 400 passes through the central bore of clamp assembly 10 of the propulsion unit. When it is desired to disassemble drill pipe 400, clamp assembly 10 applies a torque to drill pipe 400; during normal drilling operations of drill pipe 400, clamp assembly 10 does not contact drill pipe 400.

The down-the-hole drill further comprises a drill boom 100, a cylinder 200, a carriage 300 and other components. The cylinder 200 is hinged at one end to the end plate 133 of the first connecting portion 13. The sliding frame 300 is connected with the aluminum alloy beam 12 in a sliding manner and can slide up and down along the aluminum alloy beam 12, so that the compensation drilling effect is realized. The rock drill 2 and the reel 3 are arranged on the outer surface of the aluminium alloy beam 12, displaced along the V-shaped faces 121, and centred with respect to the clamp assembly 10. The rock drill 2 and the reel 3 can slide up and down along the V-shaped surface 121 under the driving of a steel wire rope transmission system, so that the propelling and the lifting are realized. The clamp assembly 10, the rock drill 2, the reel 3 and the drill boom 100 act together to achieve the operations of drilling, lifting and displacing of the propulsion mechanism.

The following propulsion operation process is generally described below.

When the propulsion device works, the oil cylinder 200 contracts, the sliding frame 300 drives the propulsion beam assembly 1 to move downwards, so that the propulsion beam assembly 1 can be reliably supported on the ground, and at the moment, because one end of the oil cylinder 200 is hinged to the first connecting part 13 arranged at the upper end of the aluminum alloy beam 12, the supported load can be reliably transmitted to the upper end face of the aluminum alloy beam 12. The operation of the propulsion device comprises two actions of lifting and propelling.

When the propulsion device is lifted: the telescopic cylinder 5 is extended to drive the guide blocks to slide to the lower ends along the guide grooves 120a on the left side and the right side of the aluminum alloy beam 12, so that the second steel wire rope 62 and the third steel wire rope 71 are tensioned, the second steel wire rope 62 drives the rock drilling machine 2 to be lifted upwards along with the rotation of the second movable pulley 433 and the second fixed pulley 61, and meanwhile, the third steel wire rope 71 drives the reel 3 to be lifted upwards. At this time, since the first connecting portion 13 is disposed at the upper end of the aluminum alloy beam 12 in a U-shaped surrounding manner by using the clamping block 131, the cylinder 51 is hinged to the first connecting portion 13, and the upper fixed pulley is mounted on the first connecting portion 13, the pulling force generated by each transmission system is reliably transmitted to the first connecting portion 13, and the aluminum alloy beam 12 is not stressed.

When the propelling device propels: the telescopic cylinder 5 contracts to drive the guide table 431a to slide upwards along the guide grooves 120a on the left side and the right side of the aluminum alloy beam 12, so that the first steel wire rope 42 and the third steel wire rope 71 are tensioned, the first steel wire rope 42 drives the rock drilling machine 2 to push downwards along with the rotation of the first movable pulley 432 and the first fixed pulley 41, and meanwhile, the third steel wire rope 71 drives the reel 3 to descend along with the downward pushing action of the rock drilling machine 2. At this time, since the first fixed pulley 41 is installed on the steel beam 11, the propulsive force generated by the wire rope transmission system is borne by the steel beam 11 and is reliably transmitted to the lower end surface of the aluminum alloy beam 12.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the scope of the present invention.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (20)

1. A propulsion device, comprising:

the push beam assembly (1) comprises a steel beam (11), an aluminum alloy beam (12), a first connecting part (13) and a second connecting part (14); the first connecting part (13) is mounted at the first end of the aluminum alloy beam (12), and the second connecting part (14) is mounted at the second end of the aluminum alloy beam (12); the steel beam (11) is fixed on one side, away from the aluminum alloy beam (12), of the second connecting part (14);

a rock drill (2) mounted to the feed beam assembly (1) elevatably along the aluminium alloy beam (12); and

a reel (3) mounted to the feed beam assembly (1) in a manner that it can be raised and lowered along the aluminum alloy beam (12).

2. A propulsion device according to claim 1, characterised in that the length of the steel beam (11) is smaller than the length of the aluminium alloy beam (12).

3. A propulsion device according to claim 1, characterised in that the length of the aluminium alloy beam (12) is greater than the maximum displacement of the rock drilling machine (2) along the aluminium alloy beam (12) and also greater than the maximum displacement of the reel (3) along the aluminium alloy beam (12).

4. A propulsion device according to claim 1, characterised in that the aluminium alloy beam (12) is extruded; and/or the steel beam (11) is a whole beam.

5. A propulsion device according to claim 1, characterised in that the first connection portion (13) surrounds the first end of the aluminium alloy beam (12) and is in abutting contact with the end surface of the first end of the aluminium alloy beam (12); and/or the second connecting part (14) surrounds the second end of the aluminum alloy beam (12) and is in abutting contact with the end face of the second end of the aluminum alloy beam (12).

6. A propulsion device according to claim 1, characterised in that the cross-section of the aluminium alloy beam (12) is multi-deformed in shape and the aluminium alloy beam (12) has a through hole (120) in the middle; and each corner of the outer contour of the aluminum alloy beam (12) is provided with a convex V-shaped surface (121).

7. A propulsion device according to claim 6, characterised in that said second connection (14) comprises:

the sealing plate (141) is abutted against the end face of the second end of the aluminum alloy beam (12);

the plate pieces (142), each plate piece (142) is fixedly connected with the closing plate (141); each plate (142) is positioned on the outer side of the aluminum alloy beam (12) and on the side, away from the steel beam (11), of the sealing plate (141); and

the clamping pieces (143) are arranged in one-to-one correspondence with the V-shaped surface (121) of the aluminum alloy beam (12), and are positioned on the outer side of the V-shaped surface (121) of the aluminum alloy beam (12); each clamping piece (143) comprises a first V-shaped groove (143a), and the first V-shaped groove (143a) is in abutting contact with the corresponding V-shaped surface (121); one plate (142) is arranged between two adjacent clamping pieces (143).

8. The propulsion device according to claim 7, characterized in that said second connection (14) further comprises:

the connecting frame (144) is fixedly connected with the closing plate (141) and/or the plate (142); the propulsion device further comprises a clamp assembly (10), and the clamp assembly (10) is mounted on the connecting frame (144).

9. The propulsion device according to claim 7, characterized in that the cross-sectional area of the closing plate (141) is larger than the cross-sectional area of the steel beam (11), and the cross-sectional area of the closing plate (141) is larger than the cross-sectional area of the through hole (120) of the aluminum alloy beam (12); the sealing plate (141) is fixed with the steel beam (11) and the aluminum alloy beam (12) through bolts.

10. The propulsion device of claim 7, further comprising:

the first transmission mechanism (4) comprises a first fixed pulley (41), a first steel wire rope (42) and a movable pulley block (43); the first fixed pulley (41) is arranged on one side, away from the steel beam (11), of the sealing plate (141), and the first fixed pulley (41) is positioned inside the through hole (120) of the aluminum alloy beam (12); the movable pulley block (43) is mounted in a through hole (120) of the aluminum alloy beam (12) in a sliding manner, and the movable pulley block (43) is positioned on one side, away from the steel beam (11), of the first fixed pulley (41); one end of the first steel wire rope (42) is fixedly connected with the sealing plate (141), and the other end of the first steel wire rope (42) sequentially rounds the movable pulley block (43) and the first fixed pulley (41) and then is fixedly connected with the rock drilling machine (2); and

a telescopic cylinder (5) comprising a cylinder barrel (51) and a piston rod (52) slidably mounted to the cylinder barrel (51); the telescopic cylinder (5) is positioned in a through hole (120) of the aluminum alloy beam (12); one of the cylinder barrel (51) and the piston rod (52) is fixedly connected with the first connecting part (13), and the other one of the cylinder barrel and the piston rod is fixedly connected with a support (431) of the movable pulley block (43);

wherein the first transmission mechanism (4) is configured to drive the rock drilling machine (2) to move from its top limit position towards its bottom limit position when the telescopic cylinder (5) retracts the piston rod (52).

11. A propulsion device according to claim 10, characterised in that said first transmission mechanism (4) further comprises:

the bracket (44) is fixed on the sealing plate (141), the bracket (44) is positioned in the through hole (120) of the aluminum alloy beam (12), and the first fixed pulley (41) is installed on the bracket (44).

12. The propulsion device of claim 10, further comprising:

the second transmission mechanism (6) comprises a second fixed pulley (61), a second steel wire rope (62) and the movable pulley block (43); the second fixed pulley (61) is mounted on the first connecting part (13), and the second fixed pulley (61) is positioned outside the through hole (120) of the aluminum alloy beam (12); one end of the second steel wire rope (62) is fixedly connected with the cylinder barrel (51), and the other end of the first steel wire rope (42) sequentially rounds the movable pulley block (43) and the second fixed pulley (61) and then is fixedly connected with the rock drilling machine (2); wherein the second transmission mechanism (6) is configured to drive the rock drilling machine (2) to move from its bottom limit position towards its top limit position when the telescopic cylinder (5) extends out of the piston rod (52).

13. The propulsion device of claim 10, further comprising:

the third transmission mechanism (7) comprises a third steel wire rope (71), one end of the third steel wire rope (71) is fixedly connected with the rock drilling machine (2), and the other end of the third steel wire rope (71) bypasses the reel (3) and is fixedly connected with the outer wall of the aluminum alloy beam (12); the other end of the third steel wire rope (71) is fixedly connected with the outer wall of the aluminum alloy beam (12) and is positioned between the bottom surface of the rock drilling machine (2) and the steel beam (11); the third transmission mechanism (7) is configured to drive the reel (3) with the rock drilling machine (2) from a top limit position towards a bottom limit position of the reel (3) itself, when the telescopic cylinder (5) retracts the piston rod (52).

14. The propulsion device of claim 10, further comprising:

the fourth transmission mechanism (8) comprises a fourth steel wire rope (81), one end of the fourth steel wire rope (81) is fixedly connected with the top of the reel (3), and the other end of the fourth steel wire rope (81) is fixedly connected with a support (431) of the movable pulley block (43) after passing around the second fixed pulley (61); wherein the fourth transmission mechanism (8) is configured to drive the reel (3) to move with the movable pulley block (43) from the bottom limit position towards the top limit position of the reel (3) itself, when the telescopic cylinder (5) extends out of the piston rod (52).

15. A propulsion device according to claim 12, characterised in that said movable pulley group (43) comprises:

a mount (431) slidably mounted in the through-hole (120) of the aluminum alloy beam (12);

a first movable sheave (432) rotatably mounted to the support (431), the first wire rope (42) being wound around the first movable sheave (432); and

the second movable pulley (433) is rotatably arranged on the support (431), and the second movable pulley (433) is positioned on one side, away from the steel beam (11), of the first movable pulley (432); the second steel wire rope (62) is wound on the second movable pulley (433).

16. A propulsion device according to claim 14, characterised in that at least two oppositely arranged guide grooves (120a) are provided in the inner wall of the through hole (120); the support (431) is correspondingly provided with two guide platforms (431 a); the guide stages (431a) are located in the guide grooves (120a) in one-to-one correspondence.

17. A propulsion device according to claim 16, characterised in that said first connection (13) comprises:

a plurality of clamping blocks (131), wherein each clamping block (131) comprises a second V-shaped groove (131a), and the clamping blocks (131) correspond to each corner of the outer contour of the aluminum alloy beam (12) in a one-to-one mode; the second V-shaped groove (131a) is in surface-to-surface contact with the V-shaped surface (121); and

the connecting piece (132) is fixedly connected with the top of the aluminum alloy beam (12); the connecting pieces (132) are arranged in pairs, and each connecting piece (132) is fixedly connected with two clamping blocks (131); and

the end plate (133) is abutted against the end face of the first end of the aluminum alloy beam (12), and the end plate (133) is fixedly connected with the connecting piece (132); the second fixed pulley (61) is attached to the end plate (133).

18. A propulsion device according to claim 17, characterised in that said first connection (13) further comprises:

a mounting seat (134) located at a first end of the aluminum alloy beam (12) and located at a side surface of the aluminum alloy beam (12); the mounting seat (134) is fixedly connected with the connecting piece (132).

19. Propulsion device according to claim 6,

the rock drill (2) comprises a third V-shaped groove (2a), and the third V-shaped groove (2a) is attached to the V-shaped surface (121); and/or the presence of a gas in the gas,

and the reel (3) is provided with a fourth V-shaped groove (3a), and the fourth V-shaped groove (3a) is attached to the V-shaped surface (121).

20. A down-the-hole drill comprising a drill pipe and a propulsion device as claimed in any one of claims 1 to 19; one end of the drill rod (400) is mounted to the rock drill (2).

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