Hydraulic rock drill and boom structure comprising same

Abstract

The utility model relates to a hydraulic rock drill and a boom structure comprising the hydraulic rock drill, the whole structure of the rock drill adopts an upper plane flattening design, and the height difference between the top of the rock drill and the center of a drill hole is reduced to the greatest extent. A gear chamber, a middle body, a cylinder body and the upper end of a rear-end shell of the rock drill are made into an integral plane structure, a rotary driving motor adopts a low-speed large-torque hydraulic motor, and a transmission pair is formed by a gear shaft structure of a bit shank and hydraulic motor driving teeth in the gear chamber to provide rotary power. The tops of the middle drill rod protection device and the front-end drill rod protection device adopt semi-opening design, and the top planes are flush with the top plane of the rock drill. The oil pipe reel on the rear pipe rack adopts a flat design, and the top height does not exceed the top surface of the rock drill. The rock drill structure with the flat upper portion and the lower center height solve the construction problem of overbreak of peripheral holes caused by the large distance between the drilling center of the rock drill and the rock wall, and can be widely applied to tunnel construction of water conservancy, roads, railways and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel excavation, in particular to a hydraulic rock drill and a boom structure comprising the hydraulic rock drill. Background Art

[0002] The main boom structure of the drilling rig is equipped with a hydraulic rock drill and drilling tools. During the tunnel construction process, the rock drill system was unable to drill peripheral holes close to the rock wall due to the excessive height between the top of the rock drill and the center of the drilling tool: the front drill bit was not accurately positioned, the rear end of the boom was tilted toward the outside of the rock wall, and the rock entry angle formed a certain angle with the surrounding contour line of the tunnel, deviating from the theoretical hole-making direction, causing the bottom contour of the hole to expand outward and form over-excavation. In the later stage, concrete had to be used to backfill the over-excavated part during the lining process, resulting in concrete waste and extended construction period. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a hydraulic rock drill and an arm structure including the hydraulic rock drill, which can be closely attached to the surface of the rock wall and perform blasting hole operations along the peripheral contour line of the tunnel, thereby solving the technical problems raised in the background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a hydraulic rock drill, including a front shell body, a gear chamber, an intermediate body and a rear shell body, characterized in that: the front shell body, the intermediate body and the rear shell body form an external shell body, and a gear chamber is arranged in one end of the external shell body close to the front shell body;

[0005] The front end shell body, the gear chamber, the intermediate body and the rear end shell body are connected in a straight line direction to form a whole.

[0006] In a preferred solution, a shank tail is provided in the outer shell, shaft teeth are provided on the shank tail in the gear chamber, a driving motor is also provided in the gear chamber, and a gear meshing with the shaft teeth is provided on the driving motor.

[0007] In a preferred solution, an impact piston is provided in the rear end shell body, and the tail end of the shank is connected to the impact piston and transmits the impact force output by the impact piston.

[0008] A boom structure of a hydraulic rock drill adopts the hydraulic rock drill.

[0009] In a preferred solution, the hydraulic rock drill is arranged on a guide rail assembly, the drill tail end is connected to the drill tool, a front drill protector and an intermediate drill support are arranged on one end of the guide rail assembly, and the drill tool is arranged through the front drill protector and the intermediate drill support.

[0010] In a preferred solution, a pipe support is provided on the other end of the guide rail assembly, and a reel is provided on the pipe support;

[0011] The reel on the pipe rack adopts a flat structure, and the top height thereof does not exceed the top surface of the hydraulic rock drill.

[0012] The utility model provides a hydraulic rock drill and a boom structure including the hydraulic rock drill. By adopting the above structure, when carrying out boom construction, the advantage of the high center of the rock drill can be used to reduce the deviation between the drilling angle and the designed drilling angle, reduce the over-excavation of the tunnel periphery contour, thereby reducing the subsequent concrete over-excavation and backfilling, and improving the economic benefit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 This is a schematic diagram of the structure of a hydraulic rock drill of the utility model.

[0015] Figure 2 The utility model is a schematic diagram of the arm structure of the hydraulic rock drill.

[0016] Figure 3 It is a schematic diagram of the construction process of the utility model.

[0017] In the figure: front end shell 1, gear chamber 2, drive motor 3, impact piston 4, drill tail 5, shaft gear 6, gear 7, intermediate body 8, rear end shell 9, guide rail assembly 10, front end drill protector 11, intermediate drill support 12, drilling tool 13, hydraulic rock drill 14, pipe support 15, reel 16. DETAILED DESCRIPTION

[0018] like Figure 1-3 A hydraulic rock drill includes a front housing 1, a gear chamber 2, an intermediate body 8 and a rear housing 9, wherein the front housing 1, the intermediate body 8 and the rear housing 9 constitute an external housing, and a gear chamber 2 is arranged in one end of the external housing close to the front housing 1;

[0019] The front end housing 1, the gear chamber 2, the intermediate body 8 and the rear end housing 9 are connected in a straight line direction to form a whole.

[0020] In a preferred solution, a shank tail 5 is provided in the outer shell, shaft teeth 6 are provided on the shank tail 5 in the gear chamber 2, and a drive motor 3 is provided in the gear chamber 2, and a gear 7 meshing with the shaft teeth 6 is provided on the drive motor 3.

[0021] In a preferred solution, an impact piston 4 is disposed in the rear end shell body 9 , and the rear end of the shank tail 5 is connected to the impact piston 4 and transmits the impact force output by the impact piston 4 .

[0022] A boom structure of a hydraulic rock drill adopts the hydraulic rock drill.

[0023] Among them, the hydraulic rock drill 14 is arranged on the guide rail assembly 10, the end of the drill tail 5 is connected to the drilling tool 13, a front end drill protector 11 and an intermediate drill support 12 are arranged on one end of the guide rail assembly 10, and the drilling tool 13 is arranged through the front end drill protector 11 and the intermediate drill support 12.

[0024] In the preferred embodiment, a pipe support 15 is provided on the other end of the guide rail assembly 10, and a reel 16 is provided on the pipe support 15;

[0025] The reel 16 on the pipe rack 15 adopts a flat structure, and the top height thereof does not exceed the top surface of the hydraulic rock drill 14 .

[0026] In the above embodiment, the original hydraulic rock drill 14 is designed to be a flat structure, so as to minimize the distance from the top of the hydraulic rock drill 14 to the drilling tool rotation center, and at the same time, the top of the hydraulic rock drill 14 is taken as the highest position.

[0027] The front end drill protector 11, the middle drill support 12 and the rear end tubing reel 16 on the boom of the hydraulic rock drill 14 are not higher than the top of the hydraulic rock drill to ensure that the top of the entire rock drill boom can be close to the rock wall for drilling operations.

[0028] like Figure 1 As shown, the rotary drive motor 3 meshes with the shaft gear 6 through the output end gear 7 to transmit the rotary torque to the drill tail 5 to provide a rotary function for the rock drill. The shaft gear 6 is processed using the shaft at the tail end of the drill tail 5 to reduce the overall structural size of the gear chamber 2.

[0029] The rotary drive motor 3 is a low-speed, high-torque hydraulic drive motor, and the rotary torque meets the drilling torque requirement.

[0030] In addition, the connecting bolts of the front end housing 1, the gear chamber 2, the intermediate body 3 and the rear end housing 9 are all arranged symmetrically on both sides and the bottom.

[0031] The oil circuit, gas circuit and other pipelines supporting the impact piston 4 are arranged on both sides of the rock drill.

[0032] like Figure 2 As shown, the overall structure of the boom of the hydraulic rock drill 14 is based on the top height of the hydraulic rock drill, and the front drill protector 11 and the middle drill support 12 are upper opening structures to reduce the height difference between the top and the rotation center.

[0033] The tubing reel 16 is a flat structure and is not higher than the top of the hydraulic rock drill 14 .

[0034] In this application, the upper plane of the boom is used as a reference. During drilling operations, the upper plane is kept close to the rock wall to reduce the generation of external insertion angles and ensure that the drilling direction is consistent with the designed contour of the tunnel.

[0035] During the tunnel excavation and drilling operation, the boom is close to the rock arm. According to the advance of 3m, the over-excavation range of the bottom of the hole is within 5cm, which has a significant effect in reducing the over-excavation of the bottom of the hole.

Claims

1. A hydraulic rock drill, comprising a front housing (1), a gear chamber (2), an intermediate body (8) and a rear housing (9), characterized in that: The front end shell body (1), the intermediate body (8) and the rear end shell body (9) form an external shell body, and a gear chamber (2) is provided in one end of the external shell body close to the front end shell body (1); The front end housing (1), the gear chamber (2), the intermediate body (8) and the rear end housing (9) are connected in a straight line direction to form a whole.

2. A hydraulic rock drill according to claim 1, characterized in that: A shank tail (5) is provided in the outer shell, a shaft tooth (6) is provided on the shank tail (5) in the gear chamber (2), a drive motor (3) is also provided in the gear chamber (2), and a gear (7) meshing with the shaft tooth (6) is provided on the drive motor (3).

3. A hydraulic rock drill according to claim 1, characterized in that: An impact piston (4) is arranged in the rear end shell body (9), and the rear end of the drill tail (5) is connected to the impact piston (4) and transmits the impact force output by the impact piston (4).

4. A boom structure of a hydraulic rock drill, characterized in that: A hydraulic rock drill according to any one of claims 1 to 3 is used.

5. The boom structure of a hydraulic rock drill according to claim 4, characterized in that: The hydraulic rock drill (14) is arranged on the guide rail assembly (10), the end of the drill tail (5) is connected to the drilling tool (13), a front drill protector (11) and an intermediate drill support (12) are arranged on one end of the guide rail assembly (10), and the drilling tool (13) passes through the front drill protector (11) and the intermediate drill support (12).

6. The boom structure of a hydraulic rock drill according to claim 5, characterized in that: A pipe support (15) is provided on the other end of the guide rail assembly (10), and a reel (16) is provided on the pipe support (15); The reel (16) on the pipe rack (15) adopts a flattened structure, and the top height thereof does not exceed the top surface of the hydraulic rock drill (14).

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