Chip removal mechanism for double-arm rock drilling and tunneling trolley

Abstract

A chip removal mechanism for a double-arm rock drilling and tunneling trolley comprises a drill bit, a drill rod and a coupler which are sequentially connected, the drill rod is sleeved with chip removal barrels evenly distributed in the longitudinal direction of the drill rod, one end of each chip removal barrel is in contact with the drill bit, a port of the end is communicated with a chip removal opening of the drill bit, the other end of each chip removal barrel is in contact with the coupler, and a downward chip outlet is formed in the peripheral side of the end. The rod body, located in the chip removal barrel, of the drill rod is sleeved with a spiral piece making contact with the inner wall of the chip removal barrel, and a resistance piece for increasing friction force is arranged on the outer circle side of the chip removal barrel. The drill rod is sleeved with the chip removal barrel, the chip removal barrel is communicated with the chip removal opening of the drill bit, rock chips drilled by the drill bit can enter the chip removal barrel through the chip removal opening of the drill bit, meanwhile, the rod body, located in the chip removal barrel, of the drill rod is sleeved with the spiral piece making contact with the inner wall of the chip removal barrel, and the spiral piece rotates when the drill rod rotates, so that the rock chips are removed. Rock debris in the debris removal barrel can be conveyed to the debris removal opening to be discharged, meanwhile, the smooth inner wall in the debris removal barrel can reduce friction force generated when the rock debris is discharged, and the drilling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of rock mining technology, specifically to a chip removal mechanism for a double-arm rock drilling rig. Background Technology

[0002] Hydraulic rock drilling rigs are widely used in underground engineering projects such as tunnels, quarries, and mines. Existing rock drills primarily utilize their own drill rods for drilling. During drilling, a large amount of slag is discharged from the hole. Traditional drill rods have a spiral structure, with the slag being discharged through the spiral gaps. During this discharge, because the slag is on the outer surface of the drill rod, and the hole wall is not smooth, significant friction occurs between the slag and the hole wall. This increases the friction between the drill rod and the hole, affecting drilling efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a chip removal mechanism for a double-arm rock drilling rig, which can reduce friction during slag discharge and improve drilling efficiency.

[0004] To address the shortcomings of the aforementioned technical problems, the present invention provides the following technical solution: a chip removal mechanism for a double-arm rock drilling rig, comprising a drill bit, a drill rod, and a coupling connected in sequence. The drill rod is fitted with chip removal cylinders evenly distributed along its longitudinal direction. One end of the chip removal cylinder contacts the drill bit, and this end port communicates with the chip removal port of the drill bit. The other end of the chip removal cylinder contacts the coupling, and a downward-facing chip outlet is opened on the circumference of this end. The drill rod body located inside the chip removal cylinder is fitted with a spiral blade that contacts the inner wall of the chip removal cylinder. A resistance element that increases friction is provided on the outer circumference of the chip removal cylinder.

[0005] As a further optimization of the chip removal mechanism for a double-arm rock drilling rig of this utility model, the resistance component consists of multiple elastic rubber rings sleeved on the chip removal cylinder, and the elastic rubber rings are detachably connected to the chip removal cylinder.

[0006] As a further optimization of the chip removal mechanism for a double-arm rock drilling rig of this utility model, the resistance element is a plurality of long strip keys arranged around the periphery of the chip removal cylinder.

[0007] As a further optimization of the chip removal mechanism for a double-arm rock drilling rig of this utility model, an inclined filter screen is provided below the chip outlet, and the two sides of the filter screen are connected to the side wall of the chip removal cylinder through connecting rods.

[0008] As a further optimization of the chip removal mechanism for a double-arm rock drilling rig of this utility model, a wear-resistant gasket is provided between the chip removal cylinder, the drill bit, and the coupling, and the wear-resistant gasket is sleeved on the drill rod.

[0009] As a further optimization of the chip removal mechanism for a double-arm rock drilling rig of this utility model, the chip removal cylinder is made of metal, and the outer and inner circular sides of the chip removal cylinder are provided with anti-corrosion coatings.

[0010] As a further optimization of the chip removal mechanism for a double-arm rock drilling rig of this utility model, the chip removal cylinder is made of plastic.

[0011] This utility model has the following beneficial effects: By installing a chip removal cylinder on the drill rod, which is connected to the chip removal port of the drill bit, the rock cuttings drilled by the drill bit will enter the chip removal cylinder through its own chip removal port. At the same time, a spiral blade is installed on the drill rod inside the chip removal cylinder, which contacts the inner wall of the chip removal cylinder. When the drill rod rotates, the spiral blade rotates, which can transport the rock cuttings in the chip removal cylinder to the chip removal port for discharge. Meanwhile, the smooth inner wall of the chip removal cylinder can reduce the friction of rock cuttings discharge and improve drilling efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the chip removal mechanism of this utility model;

[0013] Reference numerals: 1. Drill bit, 2. Chip conveyor, 3. Resistance component, 5. Drill rod, 6. Spiral blade, 7. Spiral blade, 8. Coupling. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] like Figure 1 As shown, this utility model provides a chip removal mechanism for a double-arm rock drilling rig, used to reduce friction on the rotating rod during slag discharge and improve drilling efficiency. The chip removal mechanism provided in this embodiment is similar to existing technologies in that it includes a drill bit 1, a drill rod 5, and a coupling 8 connected in sequence. The coupling 8 is used for transmission connection with the motor output shaft on the drilling rig. All of the above are existing technologies and will not be described in detail here; the implementation should be based on the ability of those skilled in the art.

[0016] The chip removal mechanism provided in this embodiment differs from the prior art in that: the drill rod 5 is fitted with chip removal cylinders 2 evenly distributed along its longitudinal direction. When the drill rod 5 rotates, the chip removal cylinders 2 do not rotate. One end of the chip removal cylinder 2 contacts the drill bit 1, and this end port communicates with the chip removal port of the drill bit 1. The other end of the chip removal cylinder 2 contacts the coupling 8, and a downward-facing chip removal cylinder 2 is formed on the circumference of this end. The rock cuttings drilled by the drill bit 1 enter the chip removal cylinder 2 through its own chip removal port and are finally discharged through the chip removal port of the chip removal cylinder 2. It should be noted that the diameter of the chip removal cylinder 2 is smaller than the diameter of the coupling 8 and the drill bit 1.

[0017] In this embodiment, a wear-resistant shim is provided between the chip conveyor 2 and the drill bit 1 and coupling 8, and the wear-resistant shim is sleeved on the drill rod 5. The wear-resistant shim reduces the frictional loss between the drill bit 1 and coupling 8 and the chip conveyor 2 when they rotate. In this embodiment, to improve the service life of the chip conveyor 2, two materials are used for the chip conveyor 2: one is metal, but the outer and inner circumferences of the chip conveyor 2 need to be coated with anti-corrosion coatings; the other is plastic.

[0018] To facilitate the discharge of rock cuttings from the chip discharge cylinder 2, a spiral blade 7 is fitted onto the drill rod 5 inside the chip discharge cylinder 2, contacting the inner wall of the cylinder 2. As the drill rod 5 rotates, the spiral blade 7 rotates, transporting the rock cuttings from the chip discharge cylinder 2 to the discharge port. The smooth inner wall of the chip discharge cylinder 2 reduces friction during chip removal.

[0019] In this embodiment, to prevent the chip conveyor 2 from rotating with the spiral blade 7, a resistance element 3 is fitted on the outer side of the chip conveyor 2 to increase the friction on the outer circumference of the chip conveyor 2. This embodiment provides two specific structures for the resistance element 3. The first type consists of multiple elastic rubber rings equidistantly fitted onto the chip conveyor 2, relying on their own elasticity to stay in place, and is detachably mounted. The second type consists of multiple elongated keys arranged around the periphery of the chip conveyor 2. It should be noted that the elastic rubber rings are easier to replace and their size is adjustable compared to the elongated keys, thus allowing the chip conveyor 2 to be adapted to different processing environments and to drilling holes of different diameters.

[0020] In this embodiment, an inclined filter screen is provided below the chip outlet 6, and the two sides of the filter screen are connected to the side wall of the chip discharge cylinder 2 via connecting rods. The filter screen can separate the outflowing rock chips and water, and a water bucket can be placed below the filter screen for collection, allowing for the reuse of water resources.

[0021] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.

Claims

1. A chip removal mechanism for a double-arm rock drilling rig, comprising a drill bit (1), a drill rod (5), and a coupling (8) connected in sequence, characterized in that: The drill rod (5) is fitted with chip discharge cylinders (2) evenly distributed along its longitudinal direction. One end of the chip discharge cylinder (2) is in contact with the drill bit (1), and the end port is connected to the chip discharge port of the drill bit (1). The other end of the chip discharge cylinder (2) is in contact with the coupling (8), and the circumference of the end is provided with a downward chip outlet (6). The rod body of the drill rod (5) located inside the chip discharge cylinder (2) is fitted with a spiral blade (7) that contacts the inner wall of the chip discharge cylinder (2). The outer circle of the chip discharge cylinder (2) is provided with a resistance element (3) to increase friction.

2. The chip removal mechanism for a double-arm rock drilling rig according to claim 1, characterized in that: The resistance element (3) consists of multiple elastic rubber rings sleeved on the chip discharge cylinder (2), and the elastic rubber rings are detachably connected to the chip discharge cylinder (2).

3. A chip removal mechanism for a double-arm rock drilling rig according to claim 1, characterized in that: The resistance element (3) consists of multiple long strip keys arranged around the periphery of the chip discharge cylinder (2).

4. A chip removal mechanism for a double-arm rock drilling rig according to claim 1, characterized in that: An inclined filter screen is provided below the chip outlet (6), and the two sides of the filter screen are connected to the side wall of the chip discharge cylinder (2) through connecting rods.

5. A chip removal mechanism for a double-arm rock drilling rig according to claim 1, characterized in that: Wear-resistant shims are provided between the chip discharge cylinder (2), the drill bit (1), and the coupling (8), and the wear-resistant shims are fitted onto the drill rod (5).

6. A chip removal mechanism for a double-arm rock drilling rig according to claim 1, characterized in that: The chip discharge cylinder (2) is made of metal, and the outer and inner sides of the chip discharge cylinder (2) are provided with anti-corrosion coatings.

7. A chip removal mechanism for a double-arm rock drilling rig according to claim 1, characterized in that: The chip discharge cylinder (2) is made of plastic.

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