Blast hole grooving device for directional blasting

Abstract

The invention belongs to the technical field of blasting excavation, and particularly relates to a blast hole grooving device for directional blasting. The positioning guide ring is arranged on the outer side of the cylinder body in a sleeving mode, the positioning guide ring and the cylinder body slide and are in radial limiting fit, and the positioning guide ring is used for being fixed to a blast hole; the drill bit mounting plate is detachably connected to the cylinder body; the at least one drill bit assembly is mounted on the drill bit mounting plate; one end of the rotating rod is coaxially and rotatably arranged in the cylinder body, the other end of the rotating rod is rotatably connected with an end cover, the end cover is coupled in the cylinder body, the outer side of the rotating rod is coupled with a driving bevel gear, the driving bevel gear is in transmission connection with the drill bit assembly, and a key groove is formed in the end, close to the end cover, of the rotating rod and used for being connected with an output shaft of a drilling machine. The method is easy to operate and convenient to implement, and the machining efficiency of the groove in the blast hole can be remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of blasting excavation, and in particular relates to a blasthole cutting device for directional blasting. Background Art

[0002] During tunnel excavation, we usually face problems such as pre-splitting blasting of semi-infinite rock mass, high-stress rock mass, and ideal rock breaking and cracking control. For pre-splitting blasting, the cracking effect directly affects the safety and stability of the formed surrounding rock and the construction efficiency and safety of other structures under construction.

[0003] Traditional pre-splitting blasting construction, including the deep hole pre-splitting blasting technology that has been promoted and applied in recent years, can not effectively reduce its own vibration impact and the degree of damage to the surrounding rock while increasing the density of wire charge or reducing the hole spacing to ensure the length and width of the pre-splitting seam; the pre-cracks are significantly affected by the stress environment, and are prone to failure to penetrate or the crack expansion trend is not the forming surface. In terms of forming optimization, some new technologies have been accumulated, such as slotting blasting.

[0004] Grooving blasting generally involves first drilling a circular blasthole and then performing directional grooving. The traditional grooving method is cumbersome, and currently, there is no dedicated equipment for blasthole grooving. Therefore, we propose a blasthole grooving device for directional blasting. Summary of the invention

[0005] The object of the present invention is to provide a blasthole grooving device for directional blasting to solve the above-mentioned problems.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A blasthole grooving device for directional blasting, comprising:

[0008] barrel;

[0009] A positioning guide ring is sleeved on the outside of the barrel, the positioning guide ring slides with the barrel and is radially limited and matched, and the positioning guide ring is used to be fixed to the blast hole;

[0010] A drill bit mounting plate, detachably connected to the barrel;

[0011] at least one drill bit assembly mounted on the drill bit mounting plate;

[0012] A rotating rod, one end of which is coaxially rotatably arranged in the barrel, the other end of which is rotatably connected to an end cover, the end cover is axially connected to the barrel, an active bevel gear is axially connected to the outer side of the rotating rod, the active bevel gear is transmission-connected to the drill bit assembly, a keyway is provided at one end of the rotating rod close to the end cover, and the keyway is used to connect to the output shaft of the drilling rig.

[0013] According to the above-mentioned blasthole grooving device for directional blasting, the blasthole includes a blasting hole, and a positioning hole is coaxially arranged at one end of the blasting hole away from the rock mass. The diameter of the positioning hole is larger than the diameter of the blasting hole, and the positioning hole is used for installing the positioning guide ring.

[0014] According to the above-mentioned blasthole grooving device for directional blasting, the positioning guide ring includes a positioning fixing ring, the outer diameter of the positioning fixing ring matches the inner diameter of the positioning hole, the outer wall of the positioning fixing ring is frictionally matched with the inner wall of the positioning hole, a blasthole fastening ring is coaxially fixed inside the positioning fixing ring, the outer diameter of the blasthole fastening ring matches the inner diameter of the blasthole, and the outer wall of the blasthole fastening ring is frictionally matched with the inner wall of the blasthole;

[0015] The inner diameter of the blast hole fastening ring matches the outer diameter of the barrel, the inner diameter of the positioning and fixing ring is larger than the outer diameter of the blast hole fastening ring, and the inner wall of the positioning and fixing ring is fixed with a guide block for sliding cooperation with the barrel.

[0016] According to the above-mentioned blasthole grooving device for directional blasting, a slide groove is provided on the side wall of the barrel along the axial direction, and the slide groove is slidably matched with the guide block.

[0017] According to the above-mentioned blasthole grooving device for directional blasting, the drill bit mounting plate includes a mounting plate, the cross section of the mounting plate is a semicircular ring, the barrel is provided with a groove for accommodating the mounting plate, the two ends of the mounting plate are respectively fixed with a female buckle of a buckle, and the male buckle of the buckle is fixed to the barrel;

[0018] A plurality of drill holes are provided in the mounting plate, and the drill holes are detachably connected to the drill assembly.

[0019] According to the above-mentioned blasthole grooving device for directional blasting, the drill hole includes a coaxially arranged mounting hole and a through hole, the drill assembly is detachably connected in the mounting hole, and the drill bit of the drill assembly passes through the through hole and is located outside the barrel.

[0020] According to the above-mentioned blasthole grooving device for directional blasting, the drill assembly includes a rotating nut, and the rotating nut is threadedly matched with the mounting hole;

[0021] A transmission rod is coaxially rotated inside the rotating nut, and the transmission rod is axially limitedly matched with the rotating nut;

[0022] A driven bevel gear is coaxially fixedly connected to one end of the transmission rod, and the driven bevel gear is meshed with the driving bevel gear;

[0023] The other end of the transmission rod is detachably connected with a cutter head.

[0024] According to the above-mentioned blasthole grooving device for directional blasting, a square hole is formed at one end of the transmission rod away from the driven bevel gear, a magnet is embedded in the square hole, one end of the cutter head is inserted into the square hole, and the cutter head is fixed to the magnet by magnetic attraction.

[0025] Compared with the prior art, the present invention has the following advantages and technical effects:

[0026] When in use, by installing the positioning guide ring after the barrel, the front end of the barrel is inserted into the blasthole first, so that the positioning guide ring and the blasthole are fixed by friction. Since the positioning guide ring and the barrel can only slide in a fixed direction, the drilling rig drives the rotating rod to drive the active bevel gear to drive each drill assembly to dig a groove, gradually push the barrel, and then dig a groove extending in the depth direction of the blasthole in the blasthole. After the groove is dug, the equipment is removed, and then blasting preparations can be carried out. The present invention is simple to operate, easy to implement, and can significantly improve the efficiency of groove processing in the blasthole. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a structural schematic diagram of another angle of the present invention;

[0030] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0031] Figure 4 It is a schematic diagram of the transmission connection between the active bevel gear and the drill bit assembly of the present invention;

[0032] Figure 5 This is a schematic diagram of the positioning guide ring structure of the present invention;

[0033] Figure 6 The cross section of the drill bit mounting plate and the structural diagram of the drill bit assembly of the present invention;

[0034] Figure 7 It is a schematic diagram of the construction state of the present invention;

[0035] Among them, 1. barrel; 2. positioning guide ring; 3. drill mounting plate; 4. drill assembly; 5. rotating rod; 6. keyway; 7. slide groove; 8. active bevel gear; 9. blasting hole; 10. positioning hole; 201. positioning fixing ring; 202. blast hole fastening ring; 203. guide block; 301. mounting plate; 302. mounting hole; 303. through hole; 401. driven bevel gear; 402. rotating nut; 403. transmission rod; 404. cutter head. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figures 1 to 7 The present invention discloses a blasthole cutting device for directional blasting, comprising:

[0039] Barrel 1;

[0040] The positioning guide ring 2 is sleeved on the outside of the barrel 1, and the positioning guide ring 2 slides with the barrel 1 and is radially limited and matched, and the positioning guide ring 2 is used to be fixed to the blast hole;

[0041] A drill bit mounting plate 3 is detachably connected to the barrel 1;

[0042] At least one drill bit assembly 4, mounted on the drill bit mounting plate 3;

[0043] A rotating rod 5 is coaxially rotatably arranged at one end in the barrel 1, and an end cover is rotatably connected to the other end of the rotating rod 5. The end cover is axially connected to the barrel 1, and an active bevel gear 8 is axially connected to the outer side of the rotating rod 5. The active bevel gear 8 is transmission-connected to the drill bit assembly 4. A keyway 6 is provided at one end of the rotating rod 5 close to the end cover, and the keyway 6 is used to connect to the output shaft of the drilling rig.

[0044] When in use, after the positioning guide ring 2 is installed on the barrel 1, the front end of the barrel 1 is inserted into the blast hole first, so that the positioning guide ring 2 is frictionally fixed with the blast hole. Since the positioning guide ring 2 and the barrel 1 can only slide in a fixed direction, the drilling rig drives the rotating rod 5 to drive the active bevel gear 8 and then drives each drill assembly 4 to dig a groove, gradually pushes the barrel 1, and then digs a groove extending in the depth direction of the blast hole in the blast hole. After the groove is dug, the equipment is removed and blasting preparation is then carried out. The present invention is simple to operate, easy to implement, and can significantly improve the efficiency of groove processing in the blast hole.

[0045] As an optional implementation, the blasthole includes a blasting hole 9 , and a positioning hole 10 is coaxially arranged at one end of the blasting hole 9 away from the rock mass. The diameter of the positioning hole 10 is larger than the diameter of the blasting hole 9 , and the positioning hole 10 is used for the installation of the positioning guide ring 2 .

[0046] As an optional embodiment, the positioning guide ring 2 includes a positioning fixing ring 201, the outer diameter of the positioning fixing ring 201 matches the inner diameter of the positioning hole 10, the outer wall of the positioning fixing ring 201 is frictionally matched with the inner wall of the positioning hole 10, a blast hole fastening ring 202 is coaxially fixed inside the positioning fixing ring 201, the outer diameter of the blast hole fastening ring 202 matches the inner diameter of the blast hole 9, and the outer wall of the blast hole fastening ring 202 is frictionally matched with the inner wall of the blast hole 9;

[0047] The inner diameter of the blasthole fastening ring 202 matches the outer diameter of the barrel 1 , the inner diameter of the positioning and fixing ring 201 is larger than the outer diameter of the blasthole fastening ring 202 , and a guide block 203 for sliding cooperation with the barrel 1 is fixedly connected to the inner wall of the positioning and fixing ring 201 .

[0048] When in use, first dig the blasting hole 9. After the blasting hole 9 is dug, the positioning hole 10 is coaxially dug. The positioning and fixing ring 201 is fixed through the positioning hole 10, so that the barrel 1 can be moved in a specified direction to avoid rotation when the groove is dug. At the same time, the blasthole fastening ring 202 is extended into the blasting hole 9. The step formed between the positioning and fixing ring 201 and the blasthole fastening ring 202 plays a limiting role to avoid excessive extension of the positioning and fixing ring 201.

[0049] As an optional implementation, a slide groove 7 is provided on the side wall of the barrel 1 along the axial direction, and the slide groove 7 is slidably matched with the guide block 203 .

[0050] When the groove is dug, the barrel 1 is slidably matched with the guide block 203 through the slide groove 7. Under the guidance of the guide block 203, the groove is dug into a straight line.

[0051] As an optional embodiment, the drill bit mounting plate 3 includes a mounting plate 301, the cross section of the mounting plate 301 is a semicircular ring, a groove for accommodating the mounting plate 301 is provided on the barrel 1, and the two ends of the mounting plate 301 are respectively fixed with a female buckle of a buckle, and the male buckle of the buckle is fixed to the barrel 1;

[0052] A plurality of drill holes are provided in the mounting plate 301 , and the drill holes are detachably connected to the drill assembly 4 .

[0053] Through the fixed and detachable connection of the male buckle and the female buckle of the buckle, the mounting plate 301 can be removed from the barrel, which is convenient for replacing the drill bit assembly 4 and adjusting the position of the drill bit assembly 4.

[0054] As an optional embodiment, the drill hole includes a coaxially arranged mounting hole 302 and a through hole 303 , the drill assembly 4 is detachably connected in the mounting hole 302 , and the drill bit of the drill assembly 4 passes through the through hole 303 and is located outside the barrel 1 .

[0055] As an optional embodiment, the drill bit assembly 4 includes a rotating nut 402, and the rotating nut 402 is threadedly matched with the mounting hole 302;

[0056] A transmission rod 403 is coaxially rotated inside the rotating nut 402, and the transmission rod 403 is axially limitedly matched with the rotating nut 402;

[0057] One end of the transmission rod 403 is coaxially fixed with a driven bevel gear 401, and the driven bevel gear 401 is meshed with the driving bevel gear 8;

[0058] The other end of the transmission rod 403 is detachably connected to a cutter head 404 .

[0059] When in use, first separate the transmission rod 403 from the cutter head 404, and screw the rotating nut 402 rotatably arranged on the transmission rod 403 into the corresponding mounting hole 302 to install the transmission rod 403. Since there are multiple mounting holes 302, the position and quantity of the drill bit assembly 4 can be adjusted according to actual needs.

[0060] The transmission rod 403 rotates by meshing with the driven bevel gear 401 and the driving bevel gear 8 , and the bottom of the transmission rod 403 passes through the through hole 303 and is installed with the cutter head 404 .

[0061] As an optional implementation, a square hole is formed at one end of the transmission rod 403 away from the driven bevel gear 401, a magnet is embedded in the square hole, one end of the cutter head 404 is inserted into the square hole, and the cutter head 404 is fixed to the magnet by magnetic attraction.

[0062] Furthermore, the transmission rod 403 is threadedly connected to the cutter head 404 .

[0063] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A blasthole grooving device for directional blasting, characterized in that: include: Barrel (1); A positioning guide ring (2) is sleeved on the outside of the barrel (1), the positioning guide ring (2) and the barrel (1) slide and radially limit the cooperation, and the positioning guide ring (2) is used to be fixed to the blast hole; A drill bit mounting plate (3) detachably connected to the barrel (1); At least one drill bit assembly (4) mounted on the drill bit mounting plate (3); A rotating rod (5) has one end coaxially rotatably arranged in the barrel (1), and the other end of the rotating rod (5) is rotatably connected to an end cover, the end cover is axially connected to the barrel (1), and an active bevel gear (8) is axially connected to the outer side of the rotating rod (5), and the active bevel gear (8) is transmission-connected to the drill bit assembly (4). A keyway (6) is provided at one end of the rotating rod (5) close to the end cover, and the keyway (6) is used to connect to the output shaft of the drilling machine.

2. A blasthole cutting device for directional blasting according to claim 1, characterized in that: The blasthole comprises a blasting hole (9), a positioning hole (10) is coaxially arranged at one end of the blasting hole (9) away from the rock mass, the diameter of the positioning hole (10) is larger than the diameter of the blasting hole (9), and the positioning hole (10) is used for installing the positioning guide ring (2).

3. A blasthole cutting device for directional blasting according to claim 2, characterized in that: The positioning guide ring (2) comprises a positioning fixing ring (201), the outer diameter of the positioning fixing ring (201) matches the inner diameter of the positioning hole (10), the outer wall of the positioning fixing ring (201) is frictionally matched with the inner wall of the positioning hole (10), a blast hole fastening ring (202) is coaxially fixed inside the positioning fixing ring (201), the outer diameter of the blast hole fastening ring (202) matches the inner diameter of the blast hole (9), and the outer wall of the blast hole fastening ring (202) is frictionally matched with the inner wall of the blast hole (9); The inner diameter of the blast hole fastening ring (202) matches the outer diameter of the barrel (1), the inner diameter of the positioning and fixing ring (201) is larger than the outer diameter of the blast hole fastening ring (202), and the inner wall of the positioning and fixing ring (201) is fixedly connected with a guide block (203) for slidingly cooperating with the barrel (1).

4. A blasthole cutting device for directional blasting according to claim 3, characterized in that: A sliding groove (7) is provided on the side wall of the barrel (1) along the axial direction, and the sliding groove (7) is slidably matched with the guide block (203).

5. The blast hole cutting device for directional blasting according to claim 1, characterized in that: The drill bit mounting plate (3) comprises a mounting plate (301), the cross section of the mounting plate (301) is in the shape of a semicircle, the barrel (1) is provided with a groove for accommodating the mounting plate (301), the two ends of the mounting plate (301) are respectively fixed with female buckles of a buckle, and the male buckle of the buckle is fixed to the barrel (1); A plurality of drill holes are provided in the mounting plate (301), and the drill holes are detachably connected to the drill assembly (4).

6. A blasthole cutting device for directional blasting according to claim 5, characterized in that: The drill hole comprises a coaxially arranged mounting hole (302) and a through hole (303); the drill assembly (4) is detachably connected in the mounting hole (302); and the drill bit of the drill assembly (4) passes through the through hole (303) and is located outside the barrel (1).

7. A blasthole cutting device for directional blasting according to claim 6, characterized in that: The drill bit assembly (4) comprises a rotating nut (402), wherein the rotating nut (402) is threadably matched with the mounting hole (302); A transmission rod (403) is coaxially rotated inside the rotating nut (402), and the transmission rod (403) is axially limitedly matched with the rotating nut (402); A driven bevel gear (401) is coaxially fixedly connected to one end of the transmission rod (403), and the driven bevel gear (401) is meshed with the driving bevel gear (8); The other end of the transmission rod (403) is detachably connected to a cutter head (404).

8. A blasthole cutting device for directional blasting according to claim 7, characterized in that: A square hole is provided at one end of the transmission rod (403) away from the driven bevel gear (401), a magnet is embedded in the square hole, one end of the cutter head (404) is inserted into the square hole, and the cutter head (404) is fixed to the magnet by magnetic attraction.

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