Propulsion device and down-the-hole drill

Abstract

The present invention discloses a propulsion device and a down-the-hole drill, which relate to the technical field of rock drilling equipment and are used to improve the force characteristics of the propulsion device. The propulsion device includes a propulsion beam assembly, a rock drill and a reel. The propulsion beam assembly includes a steel beam, an aluminum alloy beam and a first connecting portion; the first connecting portion is installed at the first end of the aluminum alloy beam, and the steel beam is fixed to the bottom end of the aluminum alloy beam. The rock drill can be installed on the propulsion beam assembly in a manner of being raised and lowered along the aluminum alloy beam. The reel can be installed on the propulsion beam assembly in a manner of being raised and lowered along the aluminum alloy beam. The above technical scheme improves the force characteristics of the propulsion beam assembly, ensures the processing accuracy and guiding accuracy of the aluminum alloy beam, and reduces the failure rate of the propulsion beam assembly; and the propulsion beam assembly is lightweight, easy to lay out the entire machine, and reduces the design and manufacturing costs.

Description

Technical Field

[0001] The invention relates to the technical field of rock drilling equipment, and in particular to a propulsion device and a down-the-hole drill. Background Art

[0002] Down-the-hole drills are open-pit rock drills, which are widely used in mines, quarries, water conservancy projects, railway and highway construction, etc. Rock drilling efficiency, drilling deviation, and mining cost are important evaluation parameters for down-the-hole drills.

[0003] The single hole depth of a down-the-hole drill ranges from more than ten meters to several dozen meters, and the length of each drill rod is 2 meters to 5 meters. Therefore, the drill rod needs to be continuously connected during the drilling process to ensure the drilling depth. In order to reduce the auxiliary time of perforation and the cost of drilling tool consumption and improve the efficiency of rock drilling, it is often hoped to increase the length of the drill rod and reduce the frequency of connecting rods. The drill rod is supported by a propulsion beam. Accordingly, the length of the propulsion beam will also increase accordingly.

[0004] From the practice of medium and deep hole drilling in my country, only 20% to 30% of the boreholes have a deviation rate within 1%, 30% to 50% of the boreholes have a deviation rate within the range of 1% to 2%, and a considerable number of boreholes have a deviation rate of more than 2%. Excessive borehole deviation not only causes the bottom spacing of the blasthole to be too large or too small, affecting the blasting efficiency and increasing the large block rate, but also makes it difficult to control the boundary of the stope, resulting in an increase in the mining rate and depletion rate, which also limits the drilling depth and increases the mining cost. Underground large-diameter deep hole drilling has very strict requirements on the deviation of the drill rig, which is generally not allowed to exceed 1%. The linearity of the guide rail of the propulsion beam of the down-the-hole drill rig and the impact resistance and running stability of the propulsion system are one of the important factors that directly affect the deviation of the drill hole.

[0005] The inventors found that the related art uses a steel structure propulsion beam. The steel structure propulsion beam has the following problems: the steel structure beam needs to be welded, and the longer the length, the greater the manufacturing difficulty, the more obvious the defects such as welding internal stress deformation and welding stress residue, and the lower the linear accuracy of the steel beam guide rail. These problems will lead to poor processability of the propulsion beam, low drilling accuracy, increased drilling rig perforation deviation, affecting rock drilling efficiency, and at the same time, the steel structure propulsion beam is heavier, not easy to layout the whole machine, and increased design and manufacturing costs. Summary of the invention

[0006] The present invention provides a propulsion device and a down-the-hole drill, which are used to improve the force characteristics of the propulsion device.

[0007] An embodiment of the present invention provides a propulsion device, comprising:

[0008] A propulsion beam assembly, comprising a steel beam, an aluminum alloy beam, a first connection portion and a second connection portion; the first connection portion is installed at a first end of the aluminum alloy beam, and the second connection portion is installed at a second end of the aluminum alloy beam; the steel beam is fixed to a side of the second connection portion away from the aluminum alloy beam;

[0009] a rock drill, which can be mounted on the propulsion beam assembly so as to be lifted and lowered along the aluminum alloy beam; and

[0010] The reel can be installed on the propulsion beam assembly in a manner of being lifted and lowered along the aluminum alloy beam.

[0011] In some embodiments, the length of the steel beam is less than the length of the aluminum alloy beam.

[0012] In some embodiments, the length of the aluminum alloy beam is greater than the maximum displacement of the rock drill along the aluminum alloy beam, and is also greater than the maximum displacement of the reel along the aluminum alloy beam.

[0013] In some embodiments, the aluminum alloy beam is obtained by extrusion; and / or, the steel beam is a whole beam.

[0014] In some embodiments, the first connecting portion surrounds the first end of the aluminum alloy beam and abuts against the end surface of the first end of the aluminum alloy beam; and / or the second connecting portion surrounds the second end of the aluminum alloy beam and abuts against the end surface of the second end of the aluminum alloy beam.

[0015] In some embodiments, the cross-section of the aluminum alloy beam is deformable, and a through hole is provided in the middle of the aluminum alloy beam; and a convex V-shaped surface is provided at each corner of the outer contour of the aluminum alloy beam.

[0016] In some embodiments, the second connection portion includes:

[0017] A sealing plate abutting against an end surface of the second end of the aluminum alloy beam;

[0018] A plurality of plates, each of which is fixedly connected to the cover plate; each of which is located outside the aluminum alloy beam and on a side of the cover plate away from the steel beam; and

[0019] A plurality of clamping members are provided, each of the clamping members is arranged in one-to-one correspondence with the V-shaped surface of the aluminum alloy beam and is located on the outside of the V-shaped surface of the aluminum alloy beam; each of the clamping members comprises a first V-shaped groove, and the first V-shaped groove is in abutment contact with the V-shaped surface corresponding to itself; and a plate is arranged between two adjacent clamping members.

[0020] In some embodiments, the second connecting portion further comprises:

[0021] A connecting frame is fixedly connected to the sealing plate and / or the plate member; the propulsion device also includes a clamp assembly, and the clamp assembly is installed on the connecting frame.

[0022] In some embodiments, the cross-sectional area of ​​the sealing plate is larger than the cross-sectional area of ​​the steel beam, and the cross-sectional area of ​​the sealing plate is larger than the cross-sectional area of ​​the through hole of the aluminum alloy beam; the sealing plate is fixed to the steel beam and the aluminum alloy beam with bolts.

[0023] In some embodiments, the propulsion device further comprises:

[0024] A first transmission mechanism, comprising a first fixed pulley, a first steel wire rope and a movable pulley block; the first fixed pulley is installed on a side of the closing plate away from the steel beam, and the first fixed pulley is located inside the through hole of the aluminum alloy beam; the movable pulley block is slidably installed in the through hole of the aluminum alloy beam, and the movable pulley block is located on a side of the first fixed pulley away from the steel beam; one end of the first steel wire rope is fixedly connected to the closing plate, and the other end of the first steel wire rope is fixedly connected to the rock drill after passing through the movable pulley block and the first fixed pulley in sequence; and

[0025] A telescopic cylinder, comprising a cylinder barrel and a piston rod slidably mounted on the cylinder barrel; the telescopic cylinder is located in the through hole of the aluminum alloy beam; one of the cylinder barrel and the piston rod is fixedly connected to the first connecting portion, and the other is fixedly connected to the support of the movable pulley block;

[0026] Wherein, the first transmission mechanism is configured to drive the rock drill to move from its top limit position toward its bottom limit position when the telescopic cylinder contracts the piston rod.

[0027] In some embodiments, the first transmission mechanism further comprises:

[0028] A bracket is fixed to the sealing plate, the bracket is located in the through hole of the aluminum alloy beam, and the first fixed pulley is installed on the bracket.

[0029] In some embodiments, the propulsion device further comprises:

[0030] The second transmission mechanism comprises a second fixed pulley, a second steel wire rope and the movable pulley group; the second fixed pulley is installed on the first connecting portion, and the second fixed pulley is located outside the through hole of the aluminum alloy beam; one end of the second steel wire rope is fixedly connected to the cylinder barrel, and the other end of the first steel wire rope is fixedly connected to the rock drill after passing through the movable pulley group and the second fixed pulley in sequence; wherein the second transmission mechanism is constructed to drive the rock drill to move from its bottom limit position toward the top limit position when the telescopic cylinder extends the piston rod.

[0031] In some embodiments, the propulsion device further comprises:

[0032] The third transmission mechanism comprises a third steel wire rope, one end of which is fixedly connected to the rock drill, and the other end of which passes over the reel and is fixedly connected to the outer wall of the aluminum alloy beam; wherein the position where the other end of the third steel wire rope is fixedly connected to the outer wall of the aluminum alloy beam is located between the bottom surface of the rock drill and the steel beam; the third transmission mechanism is constructed to drive the reel to move from the top limit position of the reel itself to the bottom limit position along with the rock drill when the telescopic cylinder contracts the piston rod.

[0033] In some embodiments, the propulsion device further comprises:

[0034] The fourth transmission mechanism comprises a fourth steel wire rope, one end of which is fixedly connected to the top of the reel, and the other end of which is fixedly connected to the support of the movable pulley group after passing around the second fixed pulley; wherein the fourth transmission mechanism is constructed to drive the reel to move from the bottom limit position of the reel itself toward the top limit position along with the movable pulley group when the telescopic cylinder extends the piston rod.

[0035] In some embodiments, the movable pulley assembly comprises:

[0036] A support, slidably mounted in the through hole of the aluminum alloy beam;

[0037] a first movable pulley rotatably mounted on the support, the first steel wire rope being wound around the first movable pulley; and

[0038] The second movable pulley is rotatably mounted on the support, and the second movable pulley is located on a side of the first movable pulley away from the steel beam; the second steel wire rope is wound around the second movable pulley.

[0039] In some embodiments, at least two oppositely arranged guide grooves are provided on the inner wall of the through hole; the support is correspondingly provided with two guide platforms; and the guide platforms are located in the guide grooves in a one-to-one correspondence.

[0040] In some embodiments, the first connection portion includes:

[0041] A plurality of clamping blocks, each of which comprises a second V-shaped groove, wherein the clamping blocks correspond to each corner of the outer contour of the aluminum alloy beam one by one; the second V-shaped groove forms a surface-to-surface contact with the V-shaped surface; and

[0042] A connecting piece, fixedly connected to the top of the aluminum alloy beam; the connecting pieces are arranged in pairs, and each connecting piece is fixedly connected to two clamping blocks; and

[0043] An end plate abuts against the end surface of the first end of the aluminum alloy beam, and the end plate is fixedly connected to the connecting member; and the second fixed pulley is installed on the end plate.

[0044] In some embodiments, the first connecting portion further comprises:

[0045] The mounting seat is located at the first end of the aluminum alloy beam and at the side of the aluminum alloy beam; the mounting seat is fixedly connected to the connecting piece.

[0046] In some embodiments, the rock drill includes a third V-shaped groove, the third V-shaped groove is in contact with the V-shaped surface; and / or,

[0047] The reel has a fourth V-shaped groove, and the fourth V-shaped groove is in contact with the V-shaped surface.

[0048] An embodiment of the present invention further provides a down-the-hole drill, comprising a drill rod and a propulsion device provided by any technical solution of the present invention; one end of the drill rod is installed on the rock drill.

[0049] The propulsion device provided by the above technical solution changes the structure of the propulsion beam assembly in principle, and divides the propulsion beam assembly into three independent parts: a steel beam, an aluminum alloy beam, and a first connecting part. The steel beam and the first connecting part play a bearing role, and the aluminum alloy beam only guides but does not bear. This greatly improves the force characteristics of the propulsion beam assembly, ensures the processing accuracy and guiding accuracy of the aluminum alloy beam, and reduces the failure rate of the propulsion beam assembly; and the propulsion beam assembly is lightweight, easy to layout the whole machine, and reduces the design and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0051] Figure 1 This is a schematic diagram of the installation status of the propulsion device provided in an embodiment of the present invention.

[0052] Figure 2 for Figure 1 A is a partial enlarged schematic diagram of .

[0053] Figure 3 A schematic diagram of the connection relationship between the propulsion beam assembly, the first connecting portion and the second connecting portion provided in an embodiment of the present invention.

[0054] Figure 4 for Figure 3 An enlarged schematic diagram of the first local connection portion of B.

[0055] Figure 5 For the corresponding Figure 3An enlarged schematic diagram of another viewing angle at point B.

[0056] Figure 6 For the corresponding Figure 3 An enlarged schematic diagram of another viewing angle of point B.

[0057] Figure 7 for Figure 3 A partial enlarged schematic diagram of C.

[0058] Figure 8 for Figure 3 D is a partial enlarged schematic diagram.

[0059] Figure 9a A schematic structural diagram of an aluminum alloy beam of a propulsion beam assembly of a propulsion device provided in an embodiment of the present invention.

[0060] Figure 9b for Figure 9a Schematic cross-section of .

[0061] Fig.10 A three-dimensional schematic diagram of the second connection portion of the propulsion beam assembly of the propulsion device provided in an embodiment of the present invention.

[0062] Fig.11 Another stereoscopic schematic diagram of the second connection portion of the propulsion beam assembly of the propulsion device provided in an embodiment of the present invention.

[0063] Fig.12 Another stereoscopic schematic diagram of the second connection portion of the propulsion beam assembly of the propulsion device provided in an embodiment of the present invention.

[0064] Fig.13 A schematic diagram of the connection between a steel beam and a first fixed pulley of a propulsion beam assembly of a propulsion device provided in an embodiment of the present invention.

[0065] Fig.14 A schematic diagram of various transmission mechanisms of a propulsion device provided in an embodiment of the present invention.

[0066] Fig.15 A schematic diagram of a rock drill and a reel of a propulsion device provided by an embodiment of the present invention in a top limit position.

[0067] Fig.16 A schematic diagram of a rock drill and a reel of a propulsion device provided in an embodiment of the present invention being in a bottom limit position.

[0068] Fig.17 A simplified schematic diagram of the structure of a movable pulley block of a propulsion device provided in an embodiment of the present invention.

[0069] Fig.18 A schematic diagram of the connection relationship between the clamp assembly and the drill rod of the propulsion device provided in an embodiment of the present invention.

[0070] Fig.19 A schematic diagram of the cooperation between a rock drill and an aluminum alloy beam of a propulsion device provided in an embodiment of the present invention.

[0071] Fig. 20 A schematic diagram of the cooperation between the reel and the aluminum alloy beam of the propulsion device provided in an embodiment of the present invention.

[0072] Reference numerals:

[0073] 1. Propulsion beam assembly; 2. Rock drill; 3. Reel; 4. First transmission mechanism; 5. Telescopic cylinder; 6. Second transmission mechanism; 7. Third transmission mechanism; 8. Fourth transmission mechanism; 10. Clamp assembly;

[0074] 11. steel beam; 12. aluminum alloy beam; 13. first connecting part; 14. second connecting part; 131. clamping block; 132. connecting piece; 133. end plate; 134. mounting seat; 15. slotting weldment; 120. through hole; 120a. guide groove; 121. V-shaped surface; 122. wear-resistant plate; 143a. first V-shaped groove; 131a. second V-shaped groove;

[0075] 41. first fixed pulley; 42. first steel wire rope; 43. movable pulley block; 44. bracket; 431. support; 432. first movable pulley; 433. second movable pulley; 431a. guide platform;

[0076] 51. Cylinder; 52. Piston rod;

[0077] 61. second fixed pulley; 62. second steel wire rope; 63. fixed pulley seat;

[0078] 71. The third wire rope;

[0079] 81. Fourth wire rope;

[0080] 141. sealing plate; 142. plate member; 143. clamping member; 144. connecting frame;

[0081] 100, drill arm; 200, cylinder; 300, slide; 400, drill rod. DETAILED DESCRIPTION

[0082] Combine the following Figures 1 to 20 The technical solution provided by the present invention is described in more detail.

[0083] In this paper, the top and bottom directions are based on the drilling working state of the down-the-hole drill. During drilling, the top is far away from the ground and the bottom is near the ground.

[0084] See also Figure 1An embodiment of the present invention provides a propulsion device, which includes a propulsion beam assembly 1, a rock drill 2 and a reel 3. The propulsion 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 connection portion 13 is installed at the first end of the aluminum alloy beam 12, that is, the top end during drilling operation. The second connection portion 14 is installed at the 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, that is, the bottom end during drilling operation. The rock drill 2 can be installed on the propulsion beam assembly 1 to be lifted and lowered along the aluminum alloy beam 12. The reel 3 can be installed on the propulsion beam assembly 1 to be lifted and lowered along the aluminum alloy beam 12.

[0085] The propulsion beam assembly 1 is divided into several independent parts along its length direction, namely, a first connection part 13, an aluminum alloy beam 12, a second connection part 14, and a steel beam 11. The first connection part 13 is fixedly connected to the first end of the aluminum alloy beam 12, and the steel beam 11 is fixedly connected to the first end of the aluminum alloy beam 12.

[0086] The aluminum alloy beam 12 is used as a guide component to provide a linear guide for the lifting and lowering movement of the rock drill 2 and the reel 3. The aluminum alloy beam 12 can be obtained by extrusion molding, specifically, by hot extrusion of hard aluminum alloy or other integral molding methods.

[0087] The cross section of the aluminum alloy beam 12 is a box-shaped cross section, and the shape of the cross section is various, such as a rectangle, etc. Figure 9a and Figure 9b As shown. The cross-sectional profile of the aluminum alloy beam 12 is closed and a through hole 120 is provided at the center thereof, which runs through the length direction of the aluminum alloy beam 12. The aluminum alloy beam 12 does not have openings in the four side directions of the aluminum alloy beam 12, and the aluminum alloy beam 12 only has openings at the first end and the second end of the aluminum alloy beam 12. The through hole 120 of the aluminum alloy beam 12 is used to accommodate the movable pulley block 43, the telescopic cylinder 5, the bracket 44 and other components described later. The cross section of the through hole 120 of the aluminum alloy beam 12 is roughly rectangular, and two guide grooves 120a arranged oppositely are provided on the inner wall of the through hole 120 of the aluminum alloy beam 12. The guide groove 120a is an inner groove. In the area where the guide groove 120a is located, the wall thickness of the aluminum alloy beam 12 is less than the wall thickness of other areas where the guide groove 120a is not provided. The guide groove 120a is a linear groove, which extends along the length 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 the guide platform 431a of the 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 the instability of the piston rod 52 when it is extended for a long distance. The linear movement of the movable pulley block 43 will drive the rock drill 2 and the reel 3 to move linearly synchronously, and the drill rod connected to the rock drill 2 will also move linearly synchronously. The linear displacement of the movable pulley block 43 is proportional to the stroke of the rock drill 2.

[0088] Moreover, the aluminum alloy beam 12 is obtained by extrusion molding, which is a whole beam and does not need to be pieced together with multiple beams. In actual production, the aluminum alloy beam 12 of the required length is cut as needed to meet the stroke of a single drill rod. On the one hand, this allows the down-the-hole drill rig to be developed towards a deeper drilling depth, and it can also ensure the drilling accuracy of deep drilling and reduce the frequency of rod replacement to improve drilling efficiency. The drilling depth is theoretically related to the push-pull capacity of the rock drill 2 and the number of drill rods 400. Taking the five-meter drill rod product as an example, the aperture of the medium-sized drill rig is 115mm~152mm, and the maximum economic drilling depth is about 35 meters. The down-the-hole drill rig needs to connect 7 5-meter drill rods in sequence.

[0089] See also Figure 9b , and please combine Figures 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 surface 121 is provided. The V-shaped surface 121 extends along the length direction of the aluminum alloy beam 12, extending from the top of the aluminum alloy beam 12 to the bottom of the aluminum alloy beam 12. In some embodiments, a wear-resistant plate 122 is fixed to the outside of the V-shaped surface 121.

[0090] The wear-resistant plate 122 is made of stainless steel. There is relative movement between the rock drill 2 and the reel 3 and the aluminum alloy beam 12, so the V-shaped surface 121 is located in the travel of the rock drill 2 and the reel 3. The wear-resistant plate 122 protects the aluminum alloy beam 12 and prevents the aluminum alloy beam 12 from being damaged by the movement of the rock drill 2 and the reel 3.

[0091] Since the first connection portion 13 and the second connection portion 14 do not move relative to the aluminum alloy beam 12 , the wear-resistant plate 122 does not need to be provided on the portion of the V-shaped surface 121 corresponding to the first connection portion 13 and the second connection portion 14 .

[0092] By adopting the above method, the connection strength between the first connection part 13 and the second connection part 14 described later and the aluminum alloy beam 12 is sufficient, and the aluminum alloy beam 12 will not bear the force of the first connection part 13 and the second connection part 14.

[0093] The entire aluminum alloy beam 12 is formed by integral extrusion, and the V-shaped surface 121 and the guide groove 120a are formed during the hot extrusion process. In this way, each part of the aluminum alloy beam 12 can be processed at one time without the need for additional processing steps, thereby optimizing the manufacturing process of the aluminum alloy beam 12. On the other hand, the processed aluminum alloy beam 12 is of very high quality and very good straightness.

[0094] See also Fig.19In some embodiments, the rock drill 2 includes a third V-shaped groove 2a, and the third V-shaped groove 2a is in contact with the V-shaped surface 121. A plurality of third V-shaped grooves 2a may be provided, for example, four, to match one by one with the four V-shaped surfaces 121 on the outer surface of the aluminum alloy beam 12. Through the matching of the third V-shaped grooves 2a and the V-shaped surfaces 121, the rock drill 2 can move linearly along the outer surface of the aluminum alloy beam 12 with high precision.

[0095] See also Fig. 20 In some embodiments, the reel 3 includes a fourth V-shaped groove 3a, and the fourth V-shaped groove 3a is in contact with the V-shaped surface 121. A plurality of fourth V-shaped grooves 3a may be provided, for example, four, to match one by one with the four V-shaped surfaces 121 on the outer surface of the aluminum alloy beam 12. Through the matching of the fourth V-shaped groove 3a and the V-shaped surface 121, the reel 3 can move linearly along the outer surface of the aluminum alloy beam 12 with high precision.

[0096] The above technical solution improves the straightness of the movement of the rock drill 2 and the reel 3. Since the drill rod 400 is fixedly connected to the rock drill 2, the straightness of the drilling operation of the drill rod is also guaranteed, which reduces the drilling deviation and improves the running stability of the propulsion device.

[0097] In some embodiments, the length of the aluminum alloy beam 12 is greater than the maximum displacement of the rock drill 2 along the aluminum alloy beam 12, and is also greater than the maximum displacement of the reel 3 along the aluminum alloy beam 12, to ensure that the rock drill 2 and the reel 3 can both move completely along the aluminum alloy beam 12 to complete the displacement required for the drilling operation.

[0098] See also Fig.10 , the steel beam 11 and the aluminum alloy beam 12 are two independent components. The two components are fixedly connected, for example, by threaded connection. The steel beam 11 can be a rectangular tube, a square tube, or a welded plate structure, that is, the cross-section of the steel beam 11 can be circular, square, rectangular, etc. One end of the steel beam 11 is fixed to the aluminum alloy beam 12 by bolts, and the other end of the steel beam 11 is welded (or bolted) with a spline weldment 15. The steel beam 11 is the mounting component of the first fixed pulley 41 to be introduced later. The force applied by the first fixed pulley 41 to the propulsion beam assembly 1 is borne by the steel beam 11, and the middle part of the aluminum alloy beam 12 does not bear the force, and only the end of the aluminum alloy beam 12 bears the force, which will be analyzed in detail later.

[0099] The steel beam 11 and the first connecting portion 13 are both made of steel, and the steel beam 11 has good bearing characteristics. The aluminum alloy beam 12 has good guiding performance, so that the guiding function and bearing function of the propulsion beam assembly 1 can be taken into account.

[0100] Continue to see Fig.10In some embodiments, the propulsion beam assembly 1 also includes a sealing plate 141, which is located between the aluminum alloy beam 12 and the steel beam 11. The cross-sectional area of ​​the sealing plate 141 is greater than the cross-sectional area of ​​the steel beam 11, and the cross-sectional area of ​​the sealing plate 141 is greater than the cross-sectional area of ​​the through hole 120 of the aluminum alloy beam 12; the sealing plate 141 is fixed to the steel beam 11 and the aluminum alloy beam 12 by bolts.

[0101] The sealing plate 141 can be made of a material with good bearing capacity such as steel. In some embodiments, the sealing plate 141 is made of the same material as the steel beam 11. The sealing plate 141 is a flat plate. The sealing plate 141 is located outside the through hole 120 of the aluminum alloy beam 12, that is, the sealing plate 141 does not extend into the through hole 120 of the aluminum alloy beam 12. The sealing plate 141 allows the aluminum alloy beam 12 and the steel beam 11 to be fixedly connected.

[0102] In some embodiments, the length of the steel beam 11 is less than the length of the aluminum alloy beam 12 .

[0103] In some embodiments, the steel beam 11 is a whole beam. The steel beam 11 is very short and does not need to be a structure of multiple pieces welded together. The steel beam 11 of this length can already play the role of installing the first fixed pulley 41, the toothed weldment 15, and fixing with the aluminum alloy beam 12 by bolts, and can effectively bear the forces applied to the steel beam 11 by the above components.

[0104] See also Figures 2 to 5 In some embodiments, the first connection portion 13 includes a connection piece 132, a plurality of clamping blocks 131, and an end plate 133. Each clamping block 131 has a second V-shaped groove 131a, and the clamping block 131 corresponds to each corner of the outer contour of the aluminum alloy beam 12. The second V-shaped groove 131a forms a surface-to-surface contact with the V-shaped surface 121. The connection piece 132 is fixedly connected to the top of the aluminum alloy beam 12. The connection pieces 132 are arranged in pairs, and each connection piece 132 is fixedly connected to two clamping blocks 131.

[0105] The connecting member 132 is specifically a flat plate. The length of the connecting member 132 is much smaller than the length of the aluminum alloy beam 12. The two connecting members 132 are blocked outside the two sides of the aluminum alloy beam 12. The two connecting members 132 are symmetrically arranged relative 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 both fixed by bolts.

[0106] Each clamping block 131 is, for example, a nylon block, and four clamping blocks 131 are mounted in a surrounding manner with four V-shaped surfaces 121, and each V-shaped surface 121 has a clamping block 131 on the outside. The length of the clamping block 131 is the same as that of the connecting piece 132, and is smaller than the length of the aluminum alloy beam 12.

[0107] Continue to see Figures 4 to 6 In some embodiments, the first connecting portion 13 further includes a mounting seat 134, which is located at the first end of the aluminum alloy beam 12 and at the 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 to the connecting members 132. The mounting seat 134 includes a mounting plate 134a fixedly connected to the two connecting members 132 and two hinge ears 134b fixed to the mounting plate. One end of the oil cylinder 200 described later is mounted on the hinge ear 134b, and the other end of the oil cylinder 200 is mounted on the slide 300, as shown in FIG. Figure 1 shown.

[0108] Continue to see Figures 4 to 6 In some embodiments, the end plate 133 is located outside the first end of the aluminum alloy beam 12, and the end plate 133 blocks the end of the first end of the through hole 120 of the aluminum alloy beam 12. The end plate 133 is fixedly connected to the connecting member 132 and the mounting seat 134. The end plate 133, the connecting member 132, and the plurality of clamping blocks 131 cooperate together to cover the first end of the aluminum alloy beam 12. In addition, the end plate 133 can abut against the first end face of the aluminum alloy beam 12. The above structure makes the side of the aluminum alloy beam 12 unloaded, and only the end face of the aluminum alloy beam 12 bears the force along its own length direction (i.e., the axial direction). The first connecting portion 13 provided by the above technical solution changes the load-bearing mode of the aluminum alloy beam 12, so that the first end of the aluminum alloy beam 12 can only bear the force in the axial direction. The first connection part 13 cooperates with the second connection part 14 described later, and the second connection part 14 enables the bottom end of the aluminum alloy beam 12 to bear only the force in the axial direction, so that the entire aluminum alloy beam 12 is not loaded in the middle part, and only loads the two end faces of the first end and the second end, so that the load-bearing characteristics of the aluminum alloy beam 12 are greatly improved. Since there will be no local force concentration phenomenon on the side of the aluminum alloy beam 12, and the side of the aluminum alloy beam 12 is almost not loaded, the V-shaped surface 121 of the aluminum alloy beam 12 will not be twisted and deformed, which greatly improves the straightness of the rock drill 2, ensures the straightness of the drill rod, and reduces the drilling deviation rate.

[0109] The clamping block 131, the connecting piece 132, the mounting seat 134 and the end plate 133 of the first connecting part 13 together play a role in changing and improving the force-bearing mode of the aluminum alloy beam 12. In addition, the first connecting part 13 is also used to install the second fixed pulley 61 and the oil cylinder 200 described later. The force applied by the second fixed pulley 61 to the first connecting part 13 is borne by the first connecting part 13 and will not be transmitted to the side of the aluminum alloy beam 12. The aluminum alloy beam 12 is not easily deformed due to local force, so the guiding effect of the aluminum alloy beam 12 on the linear displacement of the rock drill 2 is effectively guaranteed, and the linearity of the displacement of the rock drill 2 is guaranteed.

[0110] From the above analysis, it can be seen that in the propulsion device provided by the embodiment of the present invention, the movement of the rock drill 2 and the reel 3 is realized by the first fixed pulley 41, the second fixed pulley 61 and the movable pulley group 43 introduced later, the force of the first fixed pulley 41 is borne by the first connecting part 13 and the end face of the aluminum alloy beam 12, the force of the second fixed pulley 61 is borne by the second connecting part 14 and the end face of the aluminum alloy beam 12, and the aluminum alloy beam 12 does not bear any force.

[0111] See also Figure 1 and Fig.18 In some embodiments, the propulsion device further includes a second connection portion 14 and a clamp assembly 10. The second connection portion 14 is mounted on the bottom outer side of the aluminum alloy beam 12. The clamp assembly 10 is mounted on the second connection portion 14.

[0112] The second connecting part 14 includes a sealing plate 141, a connecting frame 144, a plurality of plates 142 and a plurality of clamps 143. The sealing plate 141 abuts against the end surface of the second end of the aluminum alloy beam 12. Each plate 142 is fixedly connected to the sealing plate 141. A plurality of clamps 143 are arranged one-to-one corresponding to the V-shaped surface 121 of the aluminum alloy beam 12, and are located on the outside of the V-shaped surface 121 of the aluminum alloy beam 12. Each clamp 143 includes a first V-shaped groove 143a, and the first V-shaped groove 143a abuts against the V-shaped surface 121 corresponding to itself; a plate 142 is arranged between two adjacent clamps 143. The connecting frame 144 is fixedly connected to the sealing plate 141 and / or the plate 142. The clamp assembly 10 is mounted on the connecting frame 144.

[0113] The clamping member 143 has the same structure as the clamping block 131 described above, and is used to wrap the V-shaped surface 121 at the second end of the aluminum alloy beam 12. The sealing plate 141 abuts against the end face of the other end of the aluminum alloy beam 12, specifically the bottom end face. The multiple plates 142 are symmetrically arranged relative to the central axis of the aluminum alloy beam 12. The connecting frame 144 is used to install the clamp assembly 10. The above-mentioned connection method ensures the accurate relative position of the clamp assembly 10 and the drill rod 400. When the drill rod 400 needs to be disassembled, the operating force can be accurately and reliably applied to the drill rod 400 to improve the rod unloading efficiency and avoid damage to the drill rod 400 and the rock drill 2; during the drilling operation, the clamp assembly 10 does not affect the normal operation of the drill rod 400.

[0114] The clamp assembly 10 includes a first clamp 101 and a second clamp 102, and the second clamp 102 is rotatable relative to the first clamp 101. The drill rod 400 includes multiple sections, the first drill rod 401 is located at the bottom, and the second drill rod 402 is located at the top, where the top and bottom are referenced to the direction during the drilling operation. When unhooking the drill rod: the first clamp 101 clamps the first drill rod 401, and the second clamp 102 clamps the second drill rod 402, and at the same time, the second clamp 102 rotates relative to the first clamp 101, so that the thread between the first drill rod 401 and the second drill rod 402 is loosened, and the unhooking action is completed. At this time, since the second connecting portion 14 is arranged at the lower end of the aluminum alloy beam 12 in an enclosing manner, and the clamp assembly 10 is installed on the plate surface of the second connecting portion 14, the unhooking force generated by the second clamp 102 can be reliably transmitted to the four V-shaped surfaces 121 of the aluminum alloy beam 12.

[0115] A centralizer is fixed to the bottom of the clamp assembly 10, and the centralizer can ensure that the drill rod 400 does not deflect, so as to reduce the deflection.

[0116] The following describes how to realize the movement of the rock drill 2 and the reel 3 relative to the aluminum alloy beam 12. First, in order to distinguish the various wire ropes, the following description is made: Fig.15 and Fig.16 In the figure, the first steel wire rope 42 is indicated by a solid line, the second steel wire rope 62 is indicated by a dashed line, the third steel wire rope 71 is indicated by a long dashed line, and the fourth steel wire rope 81 is indicated by a dashed line.

[0117] See also Figures 14 to 16 In some embodiments, the propulsion device further includes a first transmission mechanism 4 and a telescopic cylinder 5. The first transmission mechanism 4 includes a first fixed pulley 41, a first steel wire rope 42, and a movable pulley group 43. The first fixed pulley 41 is installed on the side of the closing 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 group 43 is slidably installed in the through hole 120 of the aluminum alloy beam 12, and the movable pulley group 43 is located on the side of the first fixed pulley 41 away from the steel beam 11. One end A1 of the first steel wire rope 42 is fixedly connected to the closing plate 141, and the other end A2 of the first steel wire rope 42 is fixedly connected to the rock drill 2 after passing through the movable pulley group 43 and the first fixed pulley 41 in sequence.

[0118] See the detailed installation diagram of the first fixed pulley 41 for details. Fig.13As shown. In some embodiments, the first transmission mechanism 4 also includes a bracket 44, the bracket 44 is fixed to the sealing 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 installed on the bracket 44. The bracket 44 is a U-shaped plate, and the open end of the U-shaped plate is fixedly connected to the sealing plate 141, and both welding and bolting are possible. The first fixed pulley 41 can be rotatably installed around its own axis in the opening of the bracket 44. One end of the first steel wire rope 42 is specifically fixed to the top of the bracket 44. The other end of the first steel wire rope 42 is fixedly connected to the bottom of the rock drill 2 after passing through the first movable pulley 432 and the first fixed pulley 41 of the movable pulley group 43 in sequence.

[0119] Specifically, see the enlarged schematic diagram of the movable pulley group 43. Figure 7 As shown, see the schematic diagram Fig.17 As shown. In some embodiments, the movable pulley group 43 includes a support 431, a first movable pulley 432 and a second movable pulley 433. The support 431 is slidably mounted in the through hole 120 of the aluminum alloy beam 12. The first movable pulley 432 is rotatably mounted on the support 431, and the first steel wire rope 42 is wound around the first movable pulley 432. The second movable pulley 433 is rotatably mounted on the support 431, and the second movable pulley 433 is located on the side of the first movable pulley 432 away from the steel beam 11; the second steel wire rope 62 is wound around the second movable pulley 433. In some embodiments, the inner wall of the through hole 120 of the aluminum alloy beam 12 is provided with at least two guide grooves 120a arranged opposite to each other. The support 431 is correspondingly provided with two guide platforms 431a. The guide platforms 431a are located in the guide grooves 120a one by one. The guide platform 431a cooperates with the guide groove 120a described above to guide the movable pulley block 43 and support the piston rod 52 of the telescopic cylinder 5 described below, thereby reducing or even avoiding the instability of the piston rod 52 when it is extended over a long distance.

[0120] The telescopic cylinder 5 includes a cylinder barrel 51 and a piston rod 52 slidably mounted on the cylinder barrel 51. The telescopic cylinder 5 is located in the through hole 120 of the aluminum alloy beam 12. One of the cylinder barrel 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.

[0121] The first transmission mechanism 4 is configured to drive the rock drill 2 to move from its top limit position toward its bottom limit position when the telescopic cylinder 5 contracts the piston rod 52 .

[0122] Fig.15 The rock drill 2 is shown in the top limit position. Fig.16 The rock drill 2 is shown in the bottom limit position.

[0123] The first transmission mechanism 4 is used to realize the lowering of the rock drill 2. Fig.15The state transformation shown is Fig.16 During the state shown, the first transmission mechanism 4 works, and the second transmission mechanism 6 does not work. The specific process is as follows: the piston rod 52 of the telescopic cylinder 5 contracts, and the support 431 of the movable pulley block 43 fixedly connected to the piston rod 52 moves upward synchronously, and then the first steel wire rope 42 wound around the first movable pulley 432 of the passive pulley block 43 will also move upward synchronously. Since the length of the first steel wire rope 42 is constant, the upward movement of one end of the first steel wire rope 42 will cause the other end of the first steel wire rope 42 to drop. Then the rock drill 2 fixedly connected to the other end of the first steel wire rope 42 will also drop synchronously and move toward its own bottom limit position. The first transmission mechanism 4 adopts wire rope transmission, which greatly improves the impact resistance of the propulsion device.

[0124] Continue to see Figures 14 to 16 In some embodiments, the propulsion device further includes a second transmission mechanism 6. The second transmission mechanism 6 includes a second fixed pulley 61, a second steel wire rope 62, and a movable pulley group 43; the second fixed pulley 61 is installed on the first connecting portion 13, and the second fixed pulley 61 is located outside the through hole 120 of the aluminum alloy beam 12.

[0125] like Figure 6 As shown, the second fixed pulley 61 is located outside the top of the aluminum alloy beam 12 and is fixed to the end plate 133. There are two second fixed pulleys 61. The two second fixed pulleys 61 are fixedly mounted on the end plate 133 through a fixed pulley seat 63. Both second fixed pulleys 61 are mounted on the fixed pulley assembly seat 63 using bearings and a pin 64. The second fixed pulley 61 can rotate around its own axis, that is, the axis of the pin 64.

[0126] One end B1 of the second steel wire rope 62 is fixedly connected to the cylinder barrel 51, specifically fixed to the bottom end of the cylinder barrel 51. The other end B2 of the second steel wire rope 62 is fixedly connected to the rock drill 2 after passing through the movable pulley block 43 and the second fixed pulley 61 in sequence, specifically fixed to the top end of the rock drill 2. The top and bottom in this article are referenced to the direction during the drilling operation. Among them, the second transmission mechanism 6 is constructed to drive the rock drill 2 to move from its bottom limit position toward the top limit position when the telescopic cylinder 5 extends the piston rod 52.

[0127] The second transmission mechanism 6 is used to realize the rising process of the rock drill 2. Fig.16 The state transformation shown is Fig.15During the state shown, the second transmission mechanism 6 works, and the first transmission mechanism 4 does not work. The specific process is as follows: the piston rod 52 of the telescopic cylinder 5 extends, and the support 431 of the movable pulley block 43 fixedly connected to the piston rod 52 moves downward synchronously. Since one end of the second steel wire rope 62 is fixed to the cylinder barrel 51, this end does not move. Then the movable pulley block 43 will be pulled to one end of the second steel wire rope 62 and move synchronously. Since the movable pulley block 43 has the function of changing the moving direction, the rock drill 2 fixedly connected to the other end of the second steel wire rope 62 will also rise synchronously and move toward its own top limit position. The second transmission mechanism 6 adopts wire rope transmission, which can also greatly improve the impact resistance of the propulsion device.

[0128] Continue to see Figures 14 to 16 In some embodiments, the propulsion device further includes a third transmission mechanism 7. The third transmission mechanism 7 includes a third steel wire rope 71. One end C1 of the third steel wire rope 71 is fixedly connected to the rock drill 2, and the other end passes around the reel 3 and is fixedly connected to the outer wall of the aluminum alloy beam 12; wherein the position where the other end C2 of the third steel wire rope 71 is fixedly connected to 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 mechanism 7 is constructed to drive the reel 3 to move along with the rock drill 2 from the top limit position of the reel 3 itself toward the bottom limit position when the telescopic cylinder 5 contracts the piston rod 52.

[0129] The third transmission mechanism 7 is used to realize the lowering of the reel 3, that is, Fig.15 The status becomes Fig.16 state. During this period, the fourth transmission mechanism 8 does not work. One end of the third steel wire rope 71 is fixed, and the other end moves with the rock drill 2. The third steel wire rope 71 passes around the drum 3. When the rock drill 2 descends, the third steel wire rope 71 drives the drum 3 to descend as well. During the descent of the rock drill 2, the fourth steel wire rope 81 described later moves up with the movable pulley block 43, so it will not block the drum 3. The third transmission mechanism 7 adopts steel wire rope transmission, which can also greatly improve the impact resistance of the propulsion device.

[0130] Continue to see Figures 14 to 16 In some embodiments, the propulsion device further includes a fourth transmission mechanism 8, the fourth transmission mechanism 8 includes a fourth steel wire rope 81, one end D1 of the fourth steel wire rope 81 is fixedly connected to the top of the reel 3. The other end D2 of the fourth steel wire rope 81 is fixedly connected to the support 431 of the movable pulley block 43 after passing the second fixed pulley 61, specifically connected to the top of the support 431. The fourth transmission mechanism 8 is configured to drive the reel 3 to move from the bottom limit position of the reel 3 itself toward the top limit position along with the movable pulley block 43 when the telescopic cylinder 5 extends the piston rod 52.

[0131] The fourth transmission mechanism 8 is used to realize the lifting of the reel 3, that is, Fig.16 The status becomes Fig.15 During this period, the third transmission mechanism 7 does not work. One end of the fourth wire rope 81 is fixed, and the other end moves with the rock drill 2. The fourth wire rope 81 passes around the drum 3. When the rock drill 2 descends, the third wire rope 71 drives the drum 3 to descend. The first transmission mechanism 8 also adopts wire rope transmission, which greatly improves the impact resistance of the propulsion device.

[0132] 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.

[0133] The rising process of the rock drill 2 and the rising process of the reel 3 are synchronous; the descending process of the rock drill 2 and the descending process of the reel 3 are also synchronous.

[0134] In the above technical solution, the first fixed pulley 41, the movable pulley group 43 and the second fixed pulley 61 adopt the above installation method and structure. Even if the down-the-hole hammer vibrates and impacts frequently during operation and the working conditions are harsh, the local part of the aluminum alloy beam 12 will not be subjected to complex loads such as large-tonnage propulsion, lifting and torsion. Therefore, the aluminum alloy beam 12 is not easy to wear and tear, and no cracks will occur. The strength of the aluminum alloy beam 12 is sufficient, which greatly improves the load-bearing characteristics of the propulsion beam assembly 1, so that the propulsion device can better adapt to medium and large apertures and medium and deep length drilling.

[0135] In addition, the above technical solution adopts a wire rope transmission mechanism, which has good impact resistance and stable operation. Since the down-the-hole drilling operation requires high precision in propulsion control, the wire rope transmission mechanism is not easy to adhere to mine dust and is not easy to wear, making replacement and maintenance more convenient.

[0136] An embodiment of the present invention further provides a down-the-hole drill, comprising a drill rod and a propulsion device provided by any technical solution of the present invention.

[0137] A down-the-hole drill belongs to an open-pit rock drilling rig. The bottom end of the drill rod 400 of the down-the-hole drill is an impactor, which is connected to the drill bit. The impactor is used to impact the drill bit to drill a hole. The working principle of the down-the-hole drill is to use compressed air to drive the drill rod to break the rock and discharge the rock cuttings in the hole, while using rotation and propulsion to achieve the drilling function. Rock drilling efficiency, drilling deviation, and mining cost are important performance parameters of the down-the-hole drill, and these parameters are related to the movement of the drill rod.

[0138] The single hole-making depth of the down-the-hole drill rig ranges from more than ten meters to several tens of meters. The drill rod 400 it is equipped with is a long-specification drill rod, and the length of the propulsion beam assembly is more than 10 meters.

[0139] One end of the drill rod 400 is installed on the rock drill 2. Specifically, the thread at one end of the drill rod 400 located at the top is screwed into the bottom end of the rock drill 2 (here refers to the bottom end of the rock drill 2 during the drilling operation), and the bottom end of the drill rod 400 is connected to another drill rod 400, and so on, until the total length of all drill rods 400 meets the drilling requirements.

[0140] During the drilling process, the drill rod 400 needs to be connected, and the clamp assembly 10 is used to connect the drill rod 400 and to unfasten the drill rod 400.

[0141] The drill rod 400 is connected to the propulsion device. The drilling operation is a composite motion of the drill rod 400, driven by the propulsion device, performing a reciprocating linear motion and rotating the drill rod 400 around its own axis. For a relatively long drill rod 400, one end of the drill rod 400 is mounted on the aluminum alloy beam 12 of the propulsion device, and the other end of the drill rod 400 passes through the middle hole of the clamp assembly 10 of the propulsion device. When the drill rod 400 needs to be disassembled, the clamp assembly 10 applies torque to the drill rod 400; when the drill rod 400 is in normal drilling operation, the clamp assembly 10 does not contact the drill rod 400.

[0142] The down-the-hole drill also includes a drill arm 100, a cylinder 200, a slide 300 and other components. One end of the cylinder 200 is hinged on the end plate 133 of the first connecting part 13. The slide 300 is slidably connected to the aluminum alloy beam 12, and can slide up and down along the aluminum alloy beam 12 to achieve a compensatory drilling effect. The rock drill 2 and the reel 3 are movably arranged on the outer surface of the aluminum alloy beam 12 along the V-shaped surface 121, and are arranged in alignment with 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 drive of the wire rope transmission system to achieve propulsion and lifting. The clamp assembly 10, the rock drill 2, the reel 3, and the drill arm 100 work together to achieve drilling, lifting, and shifting operations of the propulsion mechanism.

[0143] The following is an overview of the process of advancing the work.

[0144] When the propulsion device is in operation, the oil cylinder 200 contracts, and the slide 300 drives the propulsion beam assembly 1 to move downward, so that it can be reliably supported on the ground. At this time, since one end of the oil cylinder 200 is hinged to the first connecting portion 13 set at the upper end of the aluminum alloy beam 12, the supported load is reliably transmitted to the upper end surface of the aluminum alloy beam 12. The operation of the propulsion device includes two actions: lifting and propulsion.

[0145] When the propulsion device is lifted: the telescopic cylinder 5 is extended, driving the guide block to slide toward the lower end along the guide grooves 120a on the left and right sides of the aluminum alloy beam 12, so that the second steel wire rope 62 and the third steel wire rope 71 are tensioned, and with the rotation of the second movable pulley 433 and the second fixed pulley 61, the second steel wire rope 62 drives the rock drill 2 to lift upward, and the third steel wire rope 71 drives the reel 3 to lift upward. At this time, since the first connecting part 13 is arranged at the upper end of the aluminum alloy beam 12 in a U-shaped surrounding manner using the clamping block 131, the cylinder 51 is hinged to the first connecting part 13, and the upper fixed pulley is installed on the first connecting part 13, the lifting force generated by each transmission system is reliably transmitted to the first connecting part 13, and the aluminum alloy beam 12 is not subjected to force.

[0146] When the propulsion device propels, the telescopic cylinder 5 contracts, driving the guide platform 431a to slide toward the upper end along the guide grooves 120a on the left and right sides of the aluminum alloy beam 12, so that the first steel wire rope 42 and the third steel wire rope 71 are tensioned, and with the rotation of the first movable pulley 432 and the first fixed pulley 41, the first steel wire rope 42 drives the rock drill 2 to move downward, and at the same time, the third steel wire rope 71 drives the reel 3 to descend under the action of the rock drill 2 moving downward. At this time, since the first fixed pulley 41 is installed on the steel beam 11, the propulsion force generated by the steel wire rope transmission system is borne by the steel beam 11 and reliably transmitted to the lower end surface of the aluminum alloy beam 12.

[0147] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0148] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A propulsion device, characterized in that: include: A propulsion beam assembly (1), comprising a steel beam (11), an aluminum alloy beam (12), a first connection portion (13), and a second connection portion (14); the first connection portion (13) is mounted on a first end of the aluminum alloy beam (12), and the second connection portion (14) is mounted on a second end of the aluminum alloy beam (12); the steel beam (11) is fixed to a side of the second connection portion (14) away from the aluminum alloy beam (12); and the aluminum alloy beam (12) has a through hole (120) in the middle; A rock drill (2) is mounted on the propulsion beam assembly (1) so as to be liftable along the aluminum alloy beam (12); and A reel (3) mounted on the propulsion beam assembly (1) and movable along the aluminum alloy beam (12); Wherein, the second connecting portion (14) comprises a sealing plate (141), and the sealing plate (141) abuts against an end surface of the second end of the aluminum alloy beam (12); The propulsion device further comprises: A first transmission mechanism (4), comprising a first fixed pulley (41), a first steel wire rope (42) and a movable pulley group (43); the first fixed pulley (41) is mounted on a side of the closing plate (141) away from the steel beam (11), and the first fixed pulley (41) is located inside a through hole (120) of the aluminum alloy beam (12); the movable pulley group (43) is slidably mounted in the through hole (120) of the aluminum alloy beam (12), and the movable pulley group (43) is located on a side of the first fixed pulley (41) away from the steel beam (11); one end of the first steel wire rope (42) is fixedly connected to the closing plate (141), and the other end of the first steel wire rope (42) is fixedly connected to the rock drill (2) after passing through the movable pulley group (43) and the first fixed pulley (41) in sequence; and A telescopic cylinder (5), comprising a cylinder barrel (51) and a piston rod (52) slidably mounted on the cylinder barrel (51); the telescopic cylinder (5) is located 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 to the first connecting portion (13), and the other is fixedly connected to a support (431) of the movable pulley block (43); The first transmission mechanism (4) is configured to drive the rock drill (2) to move from its top limit position toward its bottom limit position when the telescopic cylinder (5) contracts the piston rod (52).

2. The propulsion device according to claim 1, characterized in that: The length of the steel beam (11) is smaller than the length of the aluminum alloy beam (12).

3. The propulsion device according to claim 1, characterized in that: The length of the aluminum alloy beam (12) is greater than the maximum displacement of the rock drill (2) along the aluminum alloy beam (12), and is also greater than the maximum displacement of the reel (3) along the aluminum alloy beam (12).

4. The propulsion device according to claim 1, characterized in that: The aluminum alloy beam (12) is obtained by extrusion molding; and / or the steel beam (11) is a whole beam.

5. The propulsion device according to claim 1, characterized in that: The first connecting portion (13) surrounds the first end of the aluminum alloy beam (12) and is in abutment contact with the end surface of the first end of the aluminum alloy beam (12); and / or the second connecting portion (14) surrounds the second end of the aluminum alloy beam (12) and is in abutment contact with the end surface of the second end of the aluminum alloy beam (12).

6. The propulsion device according to claim 1, characterized in that: The cross-section of the aluminum alloy beam (12) is multi-deformed, and each corner of the outer contour of the aluminum alloy beam (12) is provided with an outwardly convex V-shaped surface (121).

7. The propulsion device according to claim 6, characterized in that: The second connecting portion (14) further comprises: a plurality of plate members (142), each of the plate members (142) being fixedly connected to the cover plate (141); each of the plate members (142) being located outside the aluminum alloy beam (12) and on a side of the cover plate (141) away from the steel beam (11); and A plurality of clamping members (143), each of the clamping members (143) being arranged in one-to-one correspondence with the V-shaped surface (121) of the aluminum alloy beam (12) and being located outside the V-shaped surface (121) of the aluminum alloy beam (12); each of the clamping members (143) comprising a first V-shaped groove (143a), the first V-shaped groove (143a) being in abutment contact with the V-shaped surface (121) corresponding to itself; and a plate member (142) being arranged between two adjacent clamping members (143).

8. The propulsion device according to claim 7, characterized in that: The second connecting portion (14) further comprises: A connecting frame (144) is fixedly connected to the sealing plate (141) and / or the plate member (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 sealing plate (141) is greater than the cross-sectional area of ​​the steel beam (11), and the cross-sectional area of ​​the sealing plate (141) is greater than the cross-sectional area of ​​the through hole (120) of the aluminum alloy beam (12); the sealing plate (141) is fixed to the steel beam (11) and the aluminum alloy beam (12) by bolts.

10. The propulsion device according to claim 1, characterized in that: The first transmission mechanism (4) further comprises: A bracket (44) is fixed to the sealing 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).

11. The propulsion device according to claim 1, characterized in that: Also includes: 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 connection portion (13), and the second fixed pulley (61) is located outside the through hole (120) of the aluminum alloy beam (12); one end of the second steel wire rope (62) is fixedly connected to the cylinder barrel (51), and the other end of the first steel wire rope (42) is fixedly connected to the rock drill (2) after passing through the movable pulley block (43) and the second fixed pulley (61) in sequence; wherein the second transmission mechanism (6) is configured to drive the rock drill (2) to move from its bottom limit position toward its top limit position when the telescopic cylinder (5) extends the piston rod (52).

12. The propulsion device according to claim 1, characterized in that Also includes: The third transmission mechanism (7) comprises a third steel wire rope (71), one end of the third steel wire rope (71) being fixedly connected to the rock drill (2), and the other end of the third steel wire rope (71) passing around the reel (3) and being fixedly connected to the outer wall of the aluminum alloy beam (12); wherein the position where the other end of the third steel wire rope (71) is fixedly connected to 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); and the third transmission mechanism (7) is configured to drive the reel (3) to move along with the rock drill (2) from the top limit position of the reel (3) itself toward the bottom limit position when the telescopic cylinder (5) contracts the piston rod (52).

13. The propulsion device according to claim 11, characterized in that: Also includes: A fourth transmission mechanism (8), comprising a fourth steel wire rope (81), one end of the fourth steel wire rope (81) being fixedly connected to the top of the reel (3), and the other end of the fourth steel wire rope (81) being fixedly connected to the support (431) of the movable pulley block (43) after passing around the second fixed pulley (61); wherein the fourth transmission mechanism (8) is constructed so as to drive the reel (3) to move along with the movable pulley block (43) from the bottom limit position of the reel (3) itself toward the top limit position when the telescopic cylinder (5) extends the piston rod (52).

14. The propulsion device according to claim 11, characterized in that The movable pulley block (43) comprises: A support (431) slidably mounted in the through hole (120) of the aluminum alloy beam (12); A first movable pulley (432) is rotatably mounted on the support (431), and the first steel wire rope (42) is wound around the first movable pulley (432); and The second movable pulley (433) is rotatably mounted on the support (431), and the second movable pulley (433) is located on a side of the first movable pulley (432) away from the steel beam (11); the second steel wire rope (62) is wound around the second movable pulley (433).

15. The propulsion device according to claim 13, characterized in that At least two guide grooves (120a) arranged opposite to each other are provided on the inner wall of the through hole (120); the support (431) is correspondingly provided with two guide platforms (431a); and the guide platforms (431a) are located in the guide grooves (120a) in a one-to-one correspondence.

16. The propulsion device according to claim 15, characterized in that The first connecting portion (13) comprises: a plurality of clamping blocks (131), each of the clamping blocks (131) comprising a second V-shaped groove (131a), the clamping blocks (131) corresponding one-to-one to each corner of the outer contour of the aluminum alloy beam (12); the second V-shaped groove (131a) and the V-shaped surface (121) forming surface-to-surface contact; and A connecting piece (132) is fixedly connected to the top of the aluminum alloy beam (12); the connecting pieces (132) are arranged in pairs, and each connecting piece (132) is fixedly connected to two clamping blocks (131); and An end plate (133) abuts against an end surface of the first end of the aluminum alloy beam (12); the end plate (133) is fixedly connected to the connecting member (132); and the second fixed pulley (61) is mounted on the end plate (133).

17. The propulsion device according to claim 16, characterized in that The first connecting portion (13) further comprises: The mounting seat (134) is located at the first end of the aluminum alloy beam (12) and at the side of the aluminum alloy beam (12); the mounting seat (134) is fixedly connected to the connecting member (132).

18. The propulsion device according to claim 6, characterized in that The rock drill (2) comprises a third V-shaped groove (2a), the third V-shaped groove (2a) being in contact with the V-shaped surface (121); and / or, The reel (3) comprises a fourth V-shaped groove (3a), and the fourth V-shaped groove (3a) is in contact with the V-shaped surface (121).

19. A down-the-hole drilling rig, characterized in that: It comprises a drill rod and a propulsion device according to any one of claims 1 to 18; one end of the drill rod (400) is mounted on the rock drill (2).

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