Hydraulic rock drill

Abstract

The hydraulic rock drill provided by the present invention comprises a main body, a control valve assembly, a piston, a drill tail, a drill bit and a blocking assembly, wherein the main body has a hydraulic cavity, the control valve assembly is connected to the hydraulic cavity, the piston is located in the hydraulic cavity, the piston has a first through hole, the drill tail has a second through hole, a flow channel through hole is formed in the middle of the drill bit, the flow channel through hole penetrates the drill bit along the extension direction of the drill bit, and the first through hole, the second through hole and the flow channel through hole are connected in sequence; the inner periphery of the drill bit forms a first step surface surrounding the flow channel through hole, and the first step surface faces away from the drill tail; the blocking assembly comprises a support member, a tension spring and a blocking member; the support member and the blocking member are respectively connected to the two ends of the tension spring, the support member is fixed on the inner peripheral surface of the flow channel through hole, the support member is closer to the drill tail than the blocking member, and the blocking member abuts on the first step surface and seals and blocks the flow channel through hole. The blocking member effectively prevents water from entering the hydraulic system, protects the hydraulic system, and prolongs the service life of the hydraulic rock drill.

Description

Technical Field

[0001] The present invention relates to the technical field of rock drills, and in particular to a hydraulic rock drill. Background Art

[0002] A rock drill is a tool used to directly mine stone. It drills holes in the rock strata to place explosives to blast the rock, thereby completing the mining of stone or other stone projects. In addition, the rock drill can also be converted into a destroyer to break hard layers such as concrete.

[0003] An existing hydraulic rock drill includes a main body, a control valve assembly, a piston member, a drill tail and a drill bit. The main body, the drill tail and the drill bit are connected in sequence. A hydraulic chamber is provided in the main body. The control valve assembly is connected to the hydraulic chamber. The piston member is located in the hydraulic chamber. The piston member can abut against the drill tail. A flow channel hole is formed in the middle of the drill bit. The flow channel hole penetrates the drill bit along the extension direction of the drill bit. The hydraulic chamber is connected to the flow channel hole through the drill tail.

[0004] The problem with existing hydraulic rock drills is that the first through hole of the piston, the second through hole of the drill tail and the flow channel through hole of the drill are connected in sequence to ensure the balance of air pressure and water pressure in the system, but water will flow into the hydraulic system through the drill tail, causing the hydraulic oil to emulsify, resulting in high equipment maintenance costs and short service life. Summary of the invention

[0005] The object of the present invention is to provide a hydraulic rock drill having a waterproof effect and protecting a hydraulic system.

[0006] The hydraulic rock drill provided by the present invention comprises a main body, a control valve assembly, a piston member, a drill tail and a drill bit, wherein the main body, the drill tail and the drill bit are connected in sequence, a hydraulic cavity is provided in the main body, the control valve assembly is connected to the hydraulic cavity, the piston member is located in the hydraulic cavity, the piston member can abut against the drill tail, the piston member has a first through hole, the drill tail has a second through hole, a flow channel through hole is formed in the middle of the drill bit, the flow channel through hole penetrates the drill bit along the extension direction of the drill bit, the first through hole, the second through hole and the flow channel through hole are connected in sequence; a first step surface surrounding the flow channel through hole is formed on the inner periphery of the drill bit, and the first step surface faces away from the drill tail; the hydraulic rock drill also comprises a blocking assembly, the blocking assembly comprises a support member, a tension spring and a blocking member; the support member and the blocking member are respectively connected to two ends of the tension spring, the blocking assembly is located in the flow channel, the support member is fixed on the inner peripheral surface of the flow channel through hole, the support member is closer to the drill tail than the blocking member, the blocking member abuts against the first step surface and seals and blocks the flow channel through hole.

[0007] It can be seen from the above scheme that under the tension of the tension spring, the blocking member abuts against the first step surface, sealing and blocking the flow channel hole from the direction toward the drill tail. Under the push of a certain airflow, the blocking member can leave the first step surface and form an airflow gap, thereby achieving a pressure relief effect; when water is injected into the drill to flush the rock, the blocking member effectively prevents water from entering the drill tail and then reaching the hydraulic system, thereby preventing the hydraulic oil from emulsifying, protecting the hydraulic system, and extending the service life of the hydraulic rock drill.

[0008] A further solution is that the inner circumference of the drill forms a second step surface surrounding the flow channel through hole, the second step surface faces the drill tail, and the first step surface is closer to the drill tail than the second step surface; the blocking member can be moved to an extreme position, and the extreme position is the position where the blocking member abuts against the second step surface.

[0009] As can be seen from the above, the second step surface can limit the formation of the blocking member and prevent the blocking member from being loosened and damaged under strong airflow.

[0010] A further solution is that the flow channel through hole forms a water storage cavity between the first step surface and the second step surface.

[0011] A further solution is that the hydraulic rock drill further includes a first water supply device, the first water supply device includes a first air compressor and a first water pipe, the first air compressor is fixed outside the drill bit, and the first water pipe is connected to the water storage chamber.

[0012] As can be seen from the above, the water storage chamber has a certain buffering effect and water storage effect on the water flow entering the drill, which plays a role in stabilizing the flow.

[0013] A further solution is that a drain port is also provided on the drill bit, and the drain port is connected to the water storage chamber; the hydraulic rock drill also includes a sealing cover, and the sealing cover is detachably covered on the drain port on the drill bit.

[0014] As can be seen from the above, the provision of the sealing cover and the drain port facilitates the removal of the accumulated water inside the brazing tool.

[0015] A further solution is that a gap is formed between the support member and the inner peripheral wall of the brazing bit, and the gap is communicated with the flow channel through hole.

[0016] As can be seen from the above, this arrangement prevents the support member from affecting the flowability of the flow channel through hole.

[0017] A further solution is that the hydraulic rock drill also includes a spray device, which includes a second water pipe, an atomizer, a third water pipe and a spray collar which are connected in sequence, and a plurality of atomizing nozzles are arranged on the spray collar; the atomizer is fixed outside the main body, the spray collar is fixed between the main body and the drill tail, and the atomizing nozzle faces the drill bit.

[0018] As can be seen from the above, the spray device can spray dust to protect construction workers.

[0019] A further solution is that the hydraulic rock drill further comprises a dust shield plate, which is made of a light-transmitting material and is fixed between the main body and the spray collar, and an outwardly extending dust shield portion of the dust shield plate extends beyond the outer periphery of the spray collar.

[0020] As can be seen from the above, the dust shield physically blocks the dust, further protecting the construction workers.

[0021] A further solution is that the outwardly extending dust shield portion is bent away from the main body.

[0022] As can be seen from the above, this setting can further limit the diffusion path of dust and achieve better dust prevention effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a hydraulic rock drill of the present invention.

[0024] Figure 2 It is a partial schematic diagram of an embodiment of a hydraulic rock drill of the present invention.

[0025] Figure 3 It is a schematic structural diagram of the dust shield plate and the spray collar of the hydraulic rock drill embodiment of the present invention. DETAILED DESCRIPTION

[0026] See also Figure 1 and Figure 2 , Figure 1 Schematic diagram of the structure of a hydraulic rock drill according to an embodiment of the present invention. Figure 2 The figure is a partial schematic diagram of an embodiment of a hydraulic rock drill of the present invention. The hydraulic rock drill provided by the present invention comprises a main body 11, a control valve assembly 13, a piston assembly 12, a shank assembly 2, a drill 3, a spray device 4, a dust shield 5, a first water supply device 6 and a blocking assembly 7. The main body 11, the shank assembly 2 and the drill 3 are connected in sequence, the main body 11 has a hydraulic cavity (not shown in the figure), the control valve assembly 13 is connected to the hydraulic cavity, the piston assembly 12 is located in the hydraulic cavity, the piston assembly 12 has a piston member 121, the shank assembly 2 has a shank 21 in the middle, the piston member 121 can abut against the shank 21, the piston member 121 has a first through hole 120, the shank 21 has a second through hole 210 penetrating therethrough, a flow channel through hole 30 is formed in the middle of the drill 3, the flow channel through hole 30 penetrates the drill 3 along the extension direction of the drill 3, and the first through hole 120, the second through hole 210 and the flow channel through hole 30 are connected in sequence along a straight line. The control valve assembly 13 is fixed outside the main body 11 , and is used to adjust the hydraulic state of the hydraulic chamber so that the piston 121 can achieve high-frequency reciprocating motion and impact the shank 21 .

[0027] Recombination Figure 3 , Figure 3The schematic diagram of the structure of the dust shield plate and the spray collar of the hydraulic rock drill embodiment of the present invention. The spray device 4 includes a second water pipe 41, an atomizer 42, a third water pipe 43 and a spray collar 44 which are connected in sequence, and a plurality of atomizing nozzles 441 are arranged on the spray collar 44; the atomizer 42 is fixed outside the main body 11, the spray collar 44 is fixed between the main body 11 and the drill tail 21, and a plurality of atomizing nozzles 441 are arranged on the periphery of the front 3, and the atomizing nozzles 441 face the drill bit 3. The dust shield plate 5 is made of a light-transmitting material, and the dust shield plate 5 is fixed between the main body 11 and the spray collar 44, and the protruding dust shield portion 51 of the dust shield plate 5 protrudes outside the periphery of the spray collar 44. The protruding dust shield portion 51 is bent away from the main body 11.

[0028] See also Figure 1 and Figure 2 A water storage chamber 301 with an increased flow cross-section is provided near the shank of the flow channel through hole 30. The inner circumference of the drill 3 forms a first step surface 311 and a second step surface 312 which are relatively arranged in the extending direction of the flow channel through hole 30 at the water storage chamber 301. The water storage chamber 301 is located between the first step surface 311 and the second step surface 312. The first step surface 311 faces away from the shank 21, and the second step surface 312 faces toward the shank 21. The first step surface 311 is closer to the shank 21 than the second step surface 312.

[0029] The blocking assembly 7 includes a support member 71, a tension spring 72 and a blocking member 73. The blocking member 73 is a baffle. The support member 71 and the blocking member 73 are respectively connected to the two ends of the tension spring 72. The blocking assembly 7 is located in the flow channel. The support member 71 is fixed on the inner circumferential surface of the flow channel through hole 30. A gap is formed between the support member 71 and the inner circumferential wall of the drill 3, and the gap is connected to the flow channel through hole 30. The support member 71 is closer to the drill tail 21 than the blocking member 73. The blocking member 73 abuts on the first step surface 311 and seals and blocks the flow channel through hole 30. The blocking member 73 can move to an extreme position, which is the position where the blocking member 73 abuts against the second step surface 312.

[0030] On the drill bit 3, there are a water inlet pipe wall 321 and a water discharge pipe wall 322 extending perpendicularly to the extension direction of the drill bit 3 and arranged opposite to each other at the water storage chamber 301. The water inlet of the water inlet pipe wall 321 is blocked by a blocking cover 331. The middle of the water discharge pipe wall 322 forms a water discharge port 302 connected to the outside. A sealing cover 332 is detachably covered on the water discharge port 302 on the drill bit 3. The first water supply device 6 includes a first air compressor 61 and a first water pipe 62. The first air compressor 61 is fixed outside the drill bit 3. The first water pipe 62 passes through the blocking cover 331 to the water storage chamber 301.

[0031] Under the tension of the tension spring 72, the blocking member 73 abuts against the first step surface 311, sealing and blocking the flow channel through hole 30 from the direction toward the drill tail 21. Under the push of a certain airflow, the blocking member 73 can leave the first step surface 311 and form an airflow gap, thereby achieving a pressure relief effect; when water is injected into the drill bit 3 to flush the rock, the blocking member 73 effectively prevents the water from entering the drill tail 21 and then reaching the hydraulic system, thereby preventing the hydraulic oil from emulsifying, protecting the hydraulic system, and extending the service life of the hydraulic rock drill.

[0032] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic rock drill, comprising a main body, a control valve assembly, a piston, a drill tail and a drill bit, wherein the main body, the drill tail and the drill bit are connected in sequence, the main body has a hydraulic chamber, the control valve assembly is connected to the hydraulic chamber, the piston is located in the hydraulic chamber, the piston can abut against the drill tail, the piston has a first through hole, the drill tail has a second through hole, a flow channel through hole is formed in the middle of the drill bit, the flow channel through hole penetrates the drill bit along the extension direction of the drill bit, and the first through hole, the second through hole and the flow channel through hole are connected in sequence; Features: The inner periphery of the brazing tool forms a first step surface surrounding the flow channel through hole, and the first step surface faces away from the brazing tail; The hydraulic rock drill further comprises a blocking assembly, wherein the blocking assembly comprises a support member, a tension spring and a blocking member; The support member and the blocking member are respectively connected to the two ends of the tension spring, the blocking assembly is located in the flow channel, the support member is fixed on the inner circumferential surface of the flow channel through hole, the support member is closer to the shank than the blocking member, and the blocking member abuts against the first step surface and seals and blocks the flow channel through hole; The inner periphery of the brazing element forms a second step surface surrounding the flow channel through hole, the second step surface faces the brazing tail, and the first step surface is closer to the brazing tail than the second step surface; The blocking member can be moved to an extreme position, where the extreme position is a position where the blocking member abuts against the second step surface; The flow channel through hole forms a water storage cavity between the first step surface and the second step surface; The hydraulic rock drill further comprises a first water supply device, the first water supply device comprises a first air compressor and a first water pipe, the first air compressor is fixed outside the drill bit, and the first water pipe is connected to the water storage chamber; The brazing rod is also provided with a drain port, which is connected to the water storage chamber; The hydraulic rock drill also includes a sealing cover, which is detachably covered at the drainage port on the drill bit.

2. The hydraulic rock drill according to claim 1, characterized in that: A gap is formed between the support member and the inner peripheral wall of the brazing bit, and the gap is communicated with the flow channel through hole.

3. The hydraulic rock drill according to claim 1, characterized in that: The hydraulic rock drill further comprises a spray device, which comprises a second water pipe, an atomizer, a third water pipe and a spray collar which are connected in sequence, and a plurality of atomizing nozzles are arranged on the spray collar; The atomizer is fixed outside the main body, the spray collar is fixed between the main body and the brazing tail, and the atomizing nozzle faces the brazing tool.

4. The hydraulic rock drill according to claim 3, characterized in that: The hydraulic rock drill further comprises a dust shield plate, which is made of a light-transmitting material and is fixed between the main body and the spray collar. The outwardly extending dust shield portion of the dust shield plate extends beyond the outer periphery of the spray collar.

5. The hydraulic rock drill according to claim 4, characterized in that: The outwardly extending dust shielding portion is bent away from the main body.

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