Rock drill flushing mechanism

Abstract

The utility model relates to tunnel construction machinery technical field, concretely relates to a rock drill flushing mechanism, rock drill flushing mechanism is set on the bit and is connected in the rear end of front oil lubrication system, rock drill flushing mechanism includes the head, water injection subassembly and tail support cover, this water injection subassembly and this tail support cover are used to set up the outer periphery of the bit, the tail support cover is located the rear end of water injection subassembly, the head sets up the outer periphery of water injection subassembly and this tail support cover and is used to connect to the front oil lubrication system, the front observation hole passage is formed between this water injection subassembly and this front oil lubrication system, the first observation hole that is connected to the outside is equipped in the head, the first observation hole is connected in the front observation hole passage, the water injection subassembly includes the first water seal spare for pasting the bit. The utility model solves the technical problem that the flushing medium of the flushing system of hydraulic rock drill in the prior art leaks and cannot be found in time and maintained in time.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction machinery technology, specifically to a rock drill flushing mechanism. Background Technology

[0002] Hydraulic rock drills are the most critical equipment in drill-and-blast tunnel construction. Their operation involves impact, rotation, propulsion, flushing, and lubrication. Flushing primarily removes rock debris generated during drilling and cools the drill bit, ensuring it can press firmly against the rock face to prevent dry drilling and extend its lifespan. The flushing water used in tunnel construction is often acidic, which can easily lead to corrosion and seal failure in parts of the rock drill's water injection mechanism. Furthermore, due to the elasticity of rock and drill bits, the drill bit's impact on the rock surface inevitably causes a rebound. The rock drill head, subjected to this rebound force, is prone to seal failure. When parts corrode and seals fail, flushing water enters the rock drill, causing hydraulic oil emulsification and internal corrosion, severely hindering production and shortening the drill's lifespan. Therefore, monitoring the rock drill head's seal failure is crucial during operation. Utility Model Content

[0003] The purpose of this utility model is to provide a flushing mechanism for a rock drill, so as to solve the technical problem that leakage of flushing medium in the flushing system of a hydraulic rock drill cannot be detected and maintained in a timely manner in the existing technology. The specific technical solution is as follows:

[0004] This utility model provides a rock drill flushing mechanism, which is sleeved on the drill bit and connected to the rear end of the leading lubrication system. The rock drill flushing mechanism includes a drill head, a water injection component, and a tail support sleeve. The water injection component and the tail support sleeve are used to fit against the outer periphery of the drill bit. The tail support sleeve is located at the rear end of the water injection component. The drill head is sleeved against the outer periphery of the water injection component and the tail support sleeve and is used to connect to the leading lubrication system. A front observation hole channel is formed between the water injection component and the leading lubrication system. The drill head has a first observation hole that communicates with the outside. The first observation hole communicates with the front observation hole channel. The water injection component includes a first water seal for fitting against the drill bit.

[0005] A further improvement of the flushing mechanism of the rock drill of this utility model is that the water injection component also includes a water injection sleeve for fitting against the outer periphery of the drill bit, the first water seal is located inside the water injection sleeve, the tail support sleeve is located at the rear end of the water injection sleeve, and the drill head is provided with a second observation hole, which corresponds to the gap between the tail support sleeve and the water injection sleeve.

[0006] A further improvement of the flushing mechanism of this utility model is that the water injection sleeve is provided with an inner annular water injection groove and a water injection hole, the machine head is provided with an outer annular water injection groove, and the water injection hole is connected between the inner annular water injection groove and the outer annular water injection groove. The inner annular water injection groove is used to connect to the water injection hole at the drill shank.

[0007] A further improvement of the rock drill flushing mechanism of this utility model is that the number of the first water seal is two, which are respectively spaced apart in the water injection sleeve and located at both ends of the internal annular water injection groove.

[0008] A further improvement of the rock drill flushing mechanism of this utility model is that the length of the internal annular water injection groove is greater than the stroke of the drill bit water injection hole during the rock drilling process.

[0009] A further improvement of the rock drill flushing mechanism of this utility model is that both the first observation hole and the second observation hole are located below the drill head and on the side close to the mounting plane of the propulsion beam.

[0010] A further improvement of the rock drill flushing mechanism of this utility model is that the included angle between the axis of the first observation hole and the axis of the second observation hole and the axis of the drill bit is between 0° and 90°, and the included angle between the axis of the first observation hole and the second observation hole and the plane parallel to the mounting surface of the push beam is between 0° and 90°.

[0011] A further improvement of the rock drill flushing mechanism of this utility model is that the tail support sleeve includes a second water seal for attaching to the drill bit shank.

[0012] The application of the technical solution of this utility model has the following beneficial effects:

[0013] This utility model relates to a rock drill flushing mechanism. By connecting the first observation hole to the front observation hole channel, flushing water can be discharged from the rock drill head through the first observation hole after the first water seal fails. The operator can check whether water is spraying through the observation hole to determine if the first water seal is damaged and replace it in time. This solves the technical problem of not being able to detect and maintain the flushing medium leakage in the existing hydraulic rock drill flushing system in a timely manner. The head, water injection component, and tail support sleeve of this utility model fit together tightly to prevent the intrusion of dust and other foreign objects. The first seal prevents flushing water from entering other parts of the gearbox mechanism, extending the life of the rock drill. This utility model facilitates the timely detection of damage to the rock drill head seal without changing the existing structure of the rock drill's front guide mechanism.

[0014] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0016] Figure 1 This is a longitudinal sectional view of the flushing mechanism of the rock drill of this utility model;

[0017] Figure 2 This is a schematic diagram of the tail observation slot of the flushing mechanism of the rock drill of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall structural layout of the rock drill and the propulsion beam.

[0019] Among them, 100- drill shank; 110- drill shank water injection hole; 200- rock drill front guide mechanism; 210-tail support sleeve; 220-front support sleeve; 221-first oil and gas hole; 230-stop washer; 240- drill head; 241-first oil and gas ring groove; 242-first observation hole; 243- drill head water injection port; 244-second observation hole; 250-water injection sleeve; 251-second oil and gas ring groove; 252-second oil and gas hole; 253-front observation hole channel; 254-thread structure; 255-internal annular water injection groove; 256-water injection hole; 257-external annular water injection groove; 258-tail observation groove; 260-first water seal; 270-second water seal; 300-gearbox mechanism; 400-rock drill impact mechanism; 500-propulsion beam. Detailed Implementation

[0020] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] See Figures 1-3 As shown, a rock drill flushing mechanism is sleeved on the shank 100 and connected to the rear end of the leading lubrication system. The rock drill flushing mechanism includes a head 240, a water injection component, and a tail support sleeve 210. The water injection component and the tail support sleeve 210 are sleeved and attached to the outer periphery of the shank 100. The tail support sleeve 210 is located at the rear end of the water injection component. The head 240 is sleeved and attached to the outer periphery of the water injection component and the tail support sleeve 210 and is connected to the leading lubrication system. A front observation hole channel 253 is formed between the water injection component and the leading lubrication system. The head 240 has a first observation hole 242 communicating with the outside. The first observation hole 242 communicates with the front observation hole channel 253. The water injection component includes a first water seal 260 for attaching to the shank 100.

[0022] The leading lubrication system includes a front support sleeve 220, a first oil-gas hole 221, a second oil-gas ring groove 251, a second oil-gas hole 252, and a stop washer 230. The first oil-gas hole 221 is located inside the front support sleeve 220, which is fitted around the outer periphery of the drill bit 100. The second oil-gas ring groove 251 is located inside the water injection sleeve 250 and communicates with the first oil-gas hole 221. The second oil-gas hole 252 is located inside the water injection sleeve 250 and communicates with the second oil-gas ring groove 251. The drill head 240 has a first oil-gas ring groove 241 communicating with the second oil-gas hole 252. The stop washer 230 is located between the front mating surface of the water injection sleeve 250 and the front mating surface of the drill head 240. Preferably, the stop washer 230 is made of an elastic material, such as rubber, to increase the prestress of the water injection sleeve 250 through the threaded connection. The specific structure of the pre-lubrication system is existing technology and will not be described in detail here.

[0023] Preferably, the water injection assembly further includes a water injection sleeve 250 for fitting and adhering to the outer periphery of the drill bit 100. The first water seal 260 is located inside the water injection sleeve 250, and the tail support sleeve 210 is located at the rear end of the water injection sleeve 250. The drill head 240 is provided with a second observation hole 244, which corresponds to the gap between the tail support sleeve 210 and the water injection sleeve 250. One or more tail observation grooves 258 are provided at the rear end of the water injection sleeve 250, and the tail observation grooves 258 are connected to the second observation hole 244. By providing a front observation channel between the water injection sleeve 250 and the handle sleeve, and providing tail observation grooves 258 at the tail observation grooves 258 of the water injection sleeve 250, this invention allows for observation of the damage to the seal of the rock drill head 240 through the first observation hole 242 and the second observation hole 244, while preventing external dust, oil, and other foreign matter from entering the first observation hole 242 and the second observation hole 244. When the first water seal at the front end of the water injection sleeve 250 is damaged, water will spray out through the first observation hole 242; when the first water seal at the rear end of the water injection sleeve 250 is damaged, water will spray out through the second observation hole 244. This allows for timely detection and replacement of the water seal, preventing flushing water from entering the front support sleeve 220 or other parts of the gearbox mechanism 300 and causing component failure. The outer periphery of the water injection sleeve 250 is provided with a threaded structure 254, ensuring a tight connection between the water injection sleeve 250 and the machine head 240. After the water injection sleeve 250 is secured to the machine head 240, the mating surfaces fit tightly, preventing the intrusion of dust and other foreign matter. The tail support sleeve 210 can axially limit the movement of the drill bit 100.

[0024] Preferably, the water injection sleeve 250 has an internal annular water injection groove 255 and a water injection hole 256 inside, and the machine head 240 has an external annular water injection groove 257 inside. The water injection hole 256 connects the internal annular water injection groove 255 and the external annular water injection groove 257. The internal annular water injection groove 255 is used to connect to the shank water injection hole 110. The water injection hole 256 penetrates the inside and outside of the water injection sleeve 250, and there are one or more of them. The multiple water injection holes 256 are evenly arranged around the axis. The function of the water injection hole 256 is to connect the machine head water injection port 243 and the internal annular water injection groove 255. The axial length of the internal annular water injection groove 255 is greater than the movement range of the shank water injection hole 110. Its function is to provide a flow channel area for connecting the water injection hole 256 and the shank water injection hole 110, so as to reduce the water flow resistance. The shank 100 is provided with a flushing channel that communicates with the shank water injection hole 110. It should be noted that the flushing medium flowing in the flushing channel can be not only high-pressure water, but also high-pressure gas, or other media. For ease of description and understanding, "flushing water" is used to represent "flushing medium" in this embodiment.

[0025] Preferably, there are two first water seal elements 260, which are respectively spaced apart inside the water injection sleeve 250 and located at both ends of the internal annular water injection groove 255. The first water seal element 260 has a lip-shaped structure, and the two first water seal elements 260 are arranged with their openings facing each other. When high-pressure flushing water acts on the lip, the lip opens due to the pressure, thus achieving a unilateral sealing effect.

[0026] Preferably, the length of the internal annular water injection groove 255 is greater than the stroke of the drill bit water injection hole 110 during the rock drilling process, so as to ensure that the flushing water during the rock drilling process will not invade other parts of the rock drill.

[0027] Preferably, both the first observation hole 242 and the second observation hole 244 are located below the drill head 240, that is, on the side below the drill head 240 near the feed beam 500. This reduces the risk of foreign objects such as drilling debris entering the first observation hole 242 and the second observation hole 244, and also reduces the risk of foreign objects such as drilling dust and washing water entering the rock drill due to the exposure of the first observation hole 242 and the second observation hole 244. The first observation hole 242 and the second observation hole 244 can be arranged in one or more rows as needed.

[0028] Preferred, such as Figure 3 As shown, in order for the operator to promptly detect water spraying at the observation hole, the axis of the observation hole is generally not perpendicular to the plane parallel to the mounting surface of the push beam 500. The angle between the axis of the first observation hole 242 and the second observation hole 244 and the axis of the drill bit 100 is between 0° and 90°.

[0029] Preferably, the tail support sleeve 210 includes a second water seal 270 for attaching to the drill bit 100. When the first water seal at the rear end of the water injection sleeve 250 is damaged, the second water seal 270 at the tail support sleeve 210 can prevent flushing water from entering the gearbox mechanism 300, the rock drill impact mechanism 400 behind the gearbox mechanism 300, and other parts, thus preventing parts from failing.

[0030] This utility model relates to a rock drill flushing mechanism. By connecting the first observation hole 242 to the front observation hole channel 253, flushing water can be discharged from the rock drill head 240 through the first observation hole 242 after the first water seal 260 fails. The operator can check whether water is spraying through the observation hole to determine if the first water seal 260 is damaged and replace it in time. This solves the technical problem in the prior art that the flushing medium leakage of the hydraulic rock drill flushing system cannot be detected and maintained in a timely manner. In this utility model, the drill head 240, water injection component, and tail support sleeve 210 fit together tightly to prevent the intrusion of foreign objects such as dust. The first seal can prevent flushing water from entering other parts of the gearbox mechanism 300, extending the life of the rock drill. This utility model facilitates the timely detection of seal damage in the rock drill head 240 without changing the existing structure of the rock drill front guide mechanism 200.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flushing mechanism for a rock drill, characterized in that, A rock drill flushing mechanism is fitted onto the shank (100) and connected to the rear end of the leading lubrication system. The rock drill flushing mechanism includes a head (240), a water injection component, and a tail support sleeve (210). The water injection component and the tail support sleeve (210) are fitted onto the outer periphery of the shank (100). The tail support sleeve (210) is located at the rear end of the water injection component. The head (240) is fitted onto the outer periphery of the water injection component and the tail support sleeve (210) and is connected to the leading lubrication system. A front observation hole channel (253) is formed between the water injection component and the leading lubrication system. The head (240) has a first observation hole (242) that communicates with the outside. The first observation hole (242) communicates with the front observation hole channel (253). The water injection component includes a first water seal (260) for attaching to the shank (100).

2. The rock drill flushing mechanism according to claim 1, characterized in that, The water injection assembly further includes a water injection sleeve (250) for fitting and adhering to the outer periphery of the drill bit (100), the first water seal (260) is located inside the water injection sleeve (250), the tail support sleeve (210) is located at the rear end of the water injection sleeve (250), and the head (240) is provided with a second observation hole (244), the second observation hole (244) corresponding to the gap between the tail support sleeve (210) and the water injection sleeve (250).

3. The rock drill flushing mechanism according to claim 2, characterized in that, The water injection sleeve (250) has an internal annular water injection groove (255) and a water injection hole (256) inside. The head (240) has an external annular water injection groove (257) inside. The water injection hole (256) is connected between the internal annular water injection groove (255) and the external annular water injection groove (257). The internal annular water injection groove (255) is used to connect to the water injection hole (110) at the shank of the drill bit.

4. The rock drill flushing mechanism according to claim 3, characterized in that, The number of the first water seal (260) is two, which are respectively spaced apart in the water injection sleeve (250) and located at both ends of the internal annular water injection groove (255).

5. The rock drill flushing mechanism according to claim 3, characterized in that, The length of the internal annular water injection groove (255) is greater than the travel of the drill bit water injection hole (110) during the rock drilling process.

6. The rock drill flushing mechanism according to claim 2, characterized in that, The first observation hole (242) and the second observation hole (244) are both located below the head (240) and on the side close to the mounting plane of the push beam (500).

7. The rock drill flushing mechanism according to claim 2, characterized in that, The angle between the axis of the first observation hole (242) and the axis of the second observation hole (244) and the axis of the drill bit (100) is between 0° and 90°. The angle between the axis of the first observation hole (242) and the second observation hole (244) and the plane parallel to the mounting surface of the push beam (500) is between 0° and 90°.

8. The rock drill flushing mechanism according to claim 1, characterized in that, The tail support sleeve (210) includes a second water seal (270) for attaching to the shank (100).

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