CN221256650U - Quick-change water injection jacket of rock drill and rock drill - Google Patents

Abstract

The utility model discloses a quick-change water injection jacket of a rock drill and the rock drill, which comprise a water jacket body and a water jacket head arranged at one end of the water jacket body, wherein the water jacket body is provided with an inner annular water injection groove arranged on the inner wall of the water jacket body, an outer annular water injection groove arranged on the outer wall of the water jacket body and water injection holes used for communicating the inner annular water injection groove with the outer annular water injection groove; the method is convenient for replacing vulnerable parts in the machine head, can prevent flushing water from directly corroding the machine head, can improve the maintainability and reliability of the rock drill, and improves the working efficiency of the rock drill.

Description

Quick-change water injection jacket of rock drill and rock drill

Technical Field

The utility model relates to the technical field of rock drills, in particular to a quick-change water injection jacket of a rock drill. In addition, the utility model also relates to a rock drill comprising the quick-change water jacket of the rock drill.

Background

The hydraulic rock drill is the most critical equipment in the tunnel construction of the drilling and blasting method, and the functions of impact, rotation, propulsion, flushing, lubrication and the like are needed in the working process of the rock drill, wherein the flushing purpose is mainly to remove rock fragments formed in the rock drilling process of a drill bit and cool a drilling tool, so that the drill bit can compress the rock wall surface to prevent the idle drilling and improve the service life of the drill tool. The flushing water is more in the tunnel construction process, corrosion and sealing failure of parts of a water injection mechanism of the rock drill are easy to cause, and after the corrosion and sealing failure of the parts, the parts are convenient to replace, so that the rock drill is an important examination point for showing whether the design of the rock drill is excellent.

In the existing front guide flushing water structure of the rock drill in the market at present, mainly the embedded water injection sleeve of the rock drill body, as disclosed in China patent CN202222375922.3, a positioning and guiding mechanism of the water sleeve of the rock drill, a flushing system of the rock drill and the rock drill, wherein a first circumferential positioning structure is arranged at the outer end part of the water sleeve, and a circumferential adjusting tool is matched with the first circumferential positioning structure when the water sleeve is installed; and the angle of the water jacket can be adjusted through the circumferential adjusting tool, the circumferential adjusting tool is removed after the angle position is adjusted, and then the stop ring is installed, so that the circumferential angle of the water jacket can be conveniently adjusted. Although the structure is provided with the circumferential adjusting tool so as to facilitate the assembly of Ji Shuikong and the water injection sleeve, the water injection sleeve is positioned in the machine body, ji Shuikong is also required to be assembled, the water injection sleeve and the drill shank are inconvenient to assemble and disassemble, the whole machine head is also required to be disassembled when one of the water injection sleeve, the drill shank and the water seal is damaged, the replacement difficulty is high, more time is required, and the labor is consumed and the working efficiency of the rock drill is also influenced.

In addition, the front end machine body of the rock drill is used as a water injection mechanism, for example, chinese patent CN202021204419.6 discloses a 360-degree rotating water supply mechanism of a hydraulic rock drill, a water supply disc can rotate 360 degrees to avoid collision between a water pipe and a joint and rock, but the machine head is used as the water supply mechanism, and if a drill tail or water seal in the machine head is damaged, the water supply mechanism is inconvenient to detach; and if the water hole position or the inner cavity of the machine head is rusted, the whole machine head is required to be replaced, so that the use cost of the rock drill is increased.

Disclosure of utility model

The utility model provides a quick-change water jacket of a rock drill and the rock drill, which are used for solving the problem that the head part of the existing rock drill is easy to rust, and simultaneously solving the technical problems that the head part is inconvenient to detach, the part is difficult to replace, the time is long, the labor is consumed, and the working efficiency of the rock drill is influenced after the rust or sealing failure of the head part.

According to one aspect of the utility model, a quick-change water injection jacket of a rock drill is provided, and is used for injecting flushing water into a drill shank arranged in a machine head, and comprises a water jacket body and a water jacket head arranged on one end of the water jacket body, wherein an inner annular water injection groove arranged on the inner wall of the water jacket body, an outer annular water injection groove arranged on the outer wall of the water jacket body and water injection holes used for communicating the inner annular water injection groove with the outer annular water injection groove are arranged on the water jacket body, first water seals are arranged at two ends of the inner annular water injection groove, a drill shank water hole communicated with the inner annular water injection groove is formed in the drill shank, one end, far away from the water jacket head, of the water jacket body is used for being inserted into the machine head, threads used for connecting the machine head are arranged on the outer wall of the water jacket body, and a bayonet used for driving the water jacket body to rotate is formed on the water jacket head.

Further, the bayonet is a blind hole and/or a long groove, the axis of the blind hole is arranged along the radial direction of the water jacket head, and the long groove is arranged along the axial direction of the water jacket head.

Further, the outer diameter of the water jacket head is larger than the outer diameter of the water jacket body.

Further, a stop gasket for connecting the water jacket head and the machine head is sleeved on one end, close to the water jacket head, of the water jacket body.

Further, anti-slip structures are uniformly distributed on the connecting surface of the head part of the water jacket and the stop gasket and the connecting surface of the stop gasket and the machine head.

Further, a front observing channel is formed in one end, close to the head of the water jacket, of the water jacket body, and a tail observing groove is formed in one end, far away from the head of the water jacket, of the water jacket body.

Further, a snap ring groove is formed in the inner wall, away from one end of the water jacket body, of the head portion of the water jacket, and a snap ring is arranged in the snap ring groove.

Further, a snap ring dismounting hole is formed in the end face, away from the water jacket body, of the water jacket head.

According to another aspect of the present utility model, there is further provided a rock drill, including the quick-change water jacket of a rock drill, and further including a nose, a shank disposed in the nose, a front support sleeve for supporting a front end of the shank, a tail support sleeve for supporting a tail end of the shank, and a rock drill body for driving the shank to move, wherein the front support sleeve is embedded in the quick-change water jacket of the rock drill, and a second water seal is disposed on an inner wall of the tail support sleeve.

Further, a first oil gas hole is formed in the front support sleeve, and a second oil gas hole communicated with the first oil gas hole is formed in the water jacket body.

The utility model has the following beneficial effects:

According to the quick-change water injection jacket of the rock drill, the inner annular water injection groove and the outer annular water injection groove can increase the volume of the cavity between the inner cavity of the drill head and the quick-change water injection jacket, meanwhile, the length of a finish machining matching surface of the quick-change water injection jacket and the inner cavity of the drill head can be reduced, the machining cost is reduced, in addition, the water injection hole and the water injection port of the drill head can be kept communicated without adjusting the angle between the water injection hole and the water injection port of the drill head during assembly, the assembly difficulty can be reduced, and the assembly efficiency is improved; threads are arranged on the outer wall of the water jacket body, a water jacket head is arranged at the end part of the water jacket body, the water jacket body can be inserted into the machine head, and the water jacket body is driven to rotate forwards by a buckle on the water jacket head, so that the threads are in threaded connection with the machine head and are connected and fastened; when the water jacket is required to be disassembled, the water jacket body is driven to reversely rotate by the buckle on the head part of the water jacket, so that the inner part of the machine head can be disassembled and assembled from the front end of the machine head, the operation is simple, the quick-change water jacket can be disassembled and assembled quickly, the maintainability of the rock drill can be improved, the working efficiency is improved, and the labor intensity is reduced; the two sides of the inner annular water injection groove on the inner wall of the quick-change water injection sleeve are provided with the first water seal, so that flushing water can be prevented from invading into the nose of the rock drill, the flushing water can be prevented from directly corroding the nose, the reliability of the rock drill can be improved, and the working efficiency of the rock drill can be improved.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

Fig. 1 is a schematic structural view of a quick-change water jacket of a rock drill according to a preferred embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of a limit boss according to a preferred embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of a blind via in accordance with a preferred embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of the tail observation trough of the preferred embodiment of the present utility model;

FIG. 5 is a schematic view of the construction of a preferred embodiment of the stopper washer of the present utility model;

fig. 6 is a schematic structural view of a snap ring according to a preferred embodiment of the present utility model.

Legend description:

1. A drill shank; 11. a drill tail water hole; 2. a front support sleeve; 21. a first oil hole; 22. a second oil-gas ring groove; 3. a stop pad; 4. a machine head; 41. a first oil-gas ring groove; 42. a front viewing aperture; 43. a head water filling port; 44. a tail observation hole; 45. a front bonding surface; 5. a water jacket is quickly replaced; 51. a water jacket body; 511. a thread; 512. a limit boss; 513. a front viewing channel; 514. a tail observation groove; 515. an inner annular water injection groove; 516. an outer annular water injection groove; 517. a water injection hole; 518. a second oil hole; 52. a water jacket head; 521. a blind hole; 522. a long groove; 523. a snap ring groove; 524. a clasp; 525. a clasp detachment hole; 526. a water jacket joint surface; 6. a first water seal; 7. a second water seal; 8. a tail support sleeve; 9. a rock drill body.

Detailed Description

Embodiments of the utility model are described in detail below with reference to the attached drawing figures, but the utility model can be practiced in a number of different ways, as defined and covered below.

Referring to fig. 1 to 6, a quick-change water injection sleeve 5 of a rock drill of the present embodiment is used for injecting flushing water into a drill shank 1 disposed in a drill head 4, and includes a water jacket body 51 and a water jacket head 52 disposed at one end of the water jacket body 51, an inner annular water injection groove 515 disposed on an inner wall of the water jacket body 51, an outer annular water injection groove 516 disposed on an outer wall of the water jacket body 51, and water injection holes 517 for communicating the inner annular water injection groove 515 and the outer annular water injection groove 516, both ends of the inner annular water injection groove 515 are provided with first water seals 6, a drill shank water hole 11 communicating with the inner annular water injection groove 515 is formed in the drill shank 1, one end of the water jacket body 51, which is far away from the water jacket head 52, is used for being inserted into the drill head 4, threads 511 for connecting the drill head 4 are disposed on the outer wall of the water jacket body 51, and a bayonet for driving the water jacket body 51 to rotate is formed in the water jacket head 52.

The quick-change water injection sleeve 5 of the rock drill of the embodiment can increase the volume of the cavity between the inner cavity of the machine head 4 and the quick-change water injection sleeve 5 by the inner annular water injection groove 515 and the outer annular water injection groove 516, reduce the length of the finish machining matching surface of the quick-change water injection sleeve 5 and the inner cavity of the machine head 4, and reduce the machining cost; screw threads 511 are arranged on the outer wall of the water jacket body 51, a water jacket head 52 is arranged at the end part of the water jacket body 51, the water jacket body 51 can be inserted into the machine head 4, and the water jacket body 51 is driven to rotate forwards by a buckle on the water jacket head 52, so that the screw threads 511 are in threaded connection with the machine head 4, and are connected and fastened; when the water jacket is required to be disassembled, the water jacket body 51 is driven to reversely rotate by the buckle on the water jacket head 52, so that the inner part of the machine head can be disassembled from the front end of the machine head 4 (the left end of the machine head 4 in the embodiment is taken as the front end of the machine head in fig. 1), the operation is simple, the quick-change water injection sleeve 5 can be disassembled and assembled quickly, the easy maintenance of the rock drill can be improved, the working efficiency is improved, and the labor intensity is reduced; the two sides of the inner annular water injection groove 515 on the inner wall of the quick-change water injection sleeve 5 are provided with the first water seals 6, so that flushing water can be prevented from invading the head 4 of the rock drill, flushing water can be prevented from directly corroding the head 4, the reliability of the rock drill can be improved, and the working efficiency of the rock drill can be improved. Optionally, the first water seals 6 are of a lip-shaped structure, and openings of the two first water seals 6 are arranged in opposite directions, so that when high-pressure flushing water acts on the lips, the lips are opened due to pressure effect, and a single-side sealing effect is achieved. Optionally, a corrosion-resistant coating is applied to the quick-change water jacket 5 to prevent the structure from being corroded by the flushing water. Optionally, a plurality of water injection holes 517 are uniformly arranged around the axis of the water jacket body 51, the water injection holes 517 serve to connect the head water injection port 43 with the inner annular water injection groove 515, and the length of the inner annular water injection groove 515 along the axial direction thereof is greater than the moving range of the bit shank water hole 11, so as to provide an overflow flow passage area for connecting the water injection holes 517 and the bit shank water hole 11, so as to reduce water flow resistance.

As shown in fig. 3, in the present embodiment, the bayonet is a blind hole 521, and the axis of the blind hole 521 is arranged along the radial direction of the water jacket head 52; the long rod is inserted into the blind hole 521, and the water injection sleeve 5 can be unscrewed by rotating the long rod. Optionally, the bayonet is an elongated slot 522, the elongated slot 522 is arranged along the axial direction of the water jacket head 52, a hook-shaped wrench is used to clamp the elongated slot 522, and the quick-change water injection sleeve 5 can be loosened by rotating the hook-shaped wrench. Optionally, the bayonet is a blind hole 521 and an elongated slot 522, the axis of the blind hole 521 is arranged along the radial direction of the water jacket head 52, and the elongated slot 522 is arranged along the axial direction of the water jacket head 52, so as to improve the applicability of the dismounting tool.

As shown in fig. 2 and 3, in the present embodiment, the outer diameter of the water jacket head 52 is larger than the outer diameter of the water jacket body 51; to limit the depth of the water jacket body 51 inserted into the head 4, the minimum dimension D2 of the inner hole of the head 4 is larger than the maximum dimension D1 of the internal parts such as the drill shank 1, the tail support sleeve 8 and the like, so as to ensure that the drill shank 1 and the tail support sleeve 8 can be detached from the front end of the head 4.

As shown in fig. 2 and 5, in this embodiment, a stop washer 3 for connecting the water jacket head 52 and the machine head 4 is sleeved on one end of the water jacket body 51 near the water jacket head 52, and the stop washer 3 is used for connecting the water jacket joint surface 526 and the front joint surface 45, so that the quick-change water injection sleeve 5 is buffered under the working condition of high-frequency vibration of the rock drill. Optionally, the stop gasket 3 comprises a polyurethane rubber layer, and the elastic counterforce after the stop gasket 3 is compressed can enhance the fitting effect of the quick-change water injection sleeve 5 and prevent the quick-change water injection sleeve 5 from loosening.

As shown in fig. 5, in this embodiment, the connection surface between the water jacket head 52 and the stop pad 3 and the connection surface between the stop pad 3 and the machine head 4 are uniformly provided with anti-slip structures, and the front joint surface 45 of the machine head 4, the water jacket joint surface 526 of the water jacket head 52 opposite to the front joint surface 45, and the two end surfaces of the stop pad 3 are uniformly provided with anti-slip structures, so as to prevent the quick-change water injection sleeve 5 from rotating relative to the machine head 4. Optionally, the anti-slip structure is a knurled pattern or a clamping groove structure, and when the quick-change water injection sleeve 5 is screwed down, the anti-slip structure on the front combining surface 45 is meshed with the anti-slip structure on the end surface of the stop gasket 3, and the anti-slip structure on the end surface of the stop gasket 3 is meshed with the anti-slip structure on the front combining surface 45.

As shown in fig. 1 and 2, in this embodiment, a front observation channel 513 is formed at an end of the water jacket body 51 near the water jacket head 52, a tail observation groove 514 is formed at an end of the water jacket body 51 far from the water jacket head 52, and a front observation hole 42 communicating with the front observation channel 513 and a tail observation hole 44 communicating with the tail observation groove 514 are formed in the head 4; when the first water seal 6 at the front end of the quick-change water jacket 5 is damaged, the front observation hole 42 will have a water spraying phenomenon; when the first water seal 6 at the rear end of the quick-change water filling sleeve 5 is damaged, the water spraying phenomenon occurs in the tail observation hole 44, so that an operator can timely detect and replace the water seal, and the flushing water is prevented from invading the front support sleeve 2 or other parts of the rock drill machine body 9 to cause part failure. Optionally, a limiting boss 512 is disposed on one end of the water jacket body 51 near the water jacket head 52, and a front observing channel 513 is disposed on the limiting boss 512; the limit boss 512 can define the depth of insertion of the water jacket body 51 into the head 4.

As shown in fig. 6, in this embodiment, a snap ring groove 523 is formed on an inner wall of one end of the water jacket head 52 away from the water jacket body 51, a snap ring 524 for limiting an axial position of the front support sleeve 2 is arranged in the snap ring groove 523, an interference fit or other connection modes capable of preventing relative movement of the front support sleeve 2 and the water jacket body 51 are adopted for assembly, and the front support sleeve 2 is axially limited by the snap ring 524 to prevent the front support sleeve 2 from slipping.

As shown in fig. 6, in the present embodiment, a snap ring dismounting hole 525 is formed on the end surface of the water jacket head 52 away from the water jacket body 51; when the detachable clamp ring is detached, the slender rod or the straight screwdriver is inserted into the clamp ring detaching hole 525, so that the clamp ring 524 can be abutted out, and the detaching efficiency can be improved.

As shown in fig. 1, a rock drill, the quick-change water injection sleeve 5 of the rock drill further comprises a machine head 4, a drill shank 1 arranged in the machine head 4, a front support sleeve 2 for supporting the front end of the drill shank 1, a tail support sleeve 8 for supporting the tail end of the drill shank 1 and a rock drill machine body 9 for driving the drill shank 1 to move, wherein the front support sleeve 2 is embedded in the quick-change water injection sleeve 5 of the rock drill, and a second water seal 7 is arranged on the inner wall of the tail support sleeve 8; the second water seal 7 is arranged at one end of the tail support sleeve 8, which is positioned in the machine head 4 and is close to the quick-change water injection sleeve 5, and when the first water seal 6 at the rear side of the quick-change water injection sleeve 5 is damaged, the second water seal 7 at the tail support sleeve 8 can prevent flushing water from invading the positions of other parts of the rock drill machine body 9. If the parts inside the quick-change water jacket 5 or the machine head 4 are damaged, the disassembly, assembly and replacement steps are as follows: 1. the long groove 522 or the long rod is blocked by using a hook-type spanner and inserted into the blind hole 521, and the hook-type spanner or the long rod is rotated to loosen the screw thread 511 on the quick-change water injection sleeve 5; pulling out the drill shank 1, the quick-change water injection sleeve 5 and the tail support sleeve 8 towards the front end; replacing damaged parts in the water injection mechanism; parts such as a drill shank 1, a tail support sleeve 8 and the like are reloaded into the machine head 4, the quick-change water jacket 5 is inserted, the quick-change water jacket 5 is screwed by using a hook-shaped wrench or a long rod, the structure is simple, the quick-change water jacket 5 can be conveniently dismounted and mounted through a tool, the inner parts of the machine head can be dismounted and mounted from the front end of the machine head 4, the maintainability of the rock drill can be improved, the working efficiency is improved, and the labor intensity is reduced.

As shown in fig. 1, in this embodiment, the front support sleeve 2 is embedded in the front end of the quick-change injection water jacket 5, so as to play a role in holding the shank adapter 1, and prevent unbalanced load, and since the shank adapter 1 rotates at high speed during operation of the rock drill, the front support sleeve 2 and the shank adapter 1 move relatively, so that lubrication needs to be performed between the front support sleeve 2 and the shank adapter 1; the front support sleeve 2 is provided with first oil holes 21, the number of the first oil holes 21 is at least one water jacket body 51 is provided with second oil holes 518 communicated with the first oil holes 21. Alternatively, the plurality of first oil air holes 21 are uniformly arranged around the axis thereof. Optionally, the second oil holes 518 are arranged in one-to-one correspondence with the first oil holes 21. Optionally, the first oil gas ring groove 41 is formed on the machine head 4, the second oil gas ring groove 22 is formed on the water jacket body 51, two ends of the second oil gas hole 518 are respectively communicated with the first oil gas ring groove 41 and the second oil gas ring groove 22, oil gas can be gathered in the ring grooves to ensure sufficient lubrication, and meanwhile, when the quick-change water injection jacket 5 and the front support sleeve 2 are installed, the angle between the first oil gas hole 21 and the second oil gas hole 518 can be not required to be adjusted, so that the first oil gas hole 21 and the second oil gas hole 518 can be kept communicated, the assembly difficulty can be reduced, and the assembly efficiency can be improved.

The rock drill provided by the embodiment has the following advantages:

1. Quick change water injection cover 5 passes through screw 511 with the aircraft nose 4 of rock drill and connects the fastening, and can follow the front end dismouting aircraft nose internals of aircraft nose 4, and the convenient dismouting quick change water injection cover 5 of accessible instrument can promote rock drill easy maintainability, improves work efficiency, reduces intensity of labour.

2. The stop washer 3 is assembled between the quick-change water jacket 5 and the machine head 4, and anti-slip structures are uniformly distributed on the connecting surface of the water jacket head 52 and the stop washer 3 and the connecting surface of the stop washer 3 and the machine head 4, so that the quick-change water jacket 5 can be prevented from loosening under the working condition of high-frequency vibration of the rock drill, and meanwhile, buffering is achieved.

3. The quick-change water injection jacket 5 comprises a water injection hole 517 and an inner annular water injection groove 515 so as to connect the water gap of the machine head 4 and the drill shank 1, thereby preventing flushing water from directly corroding the machine head 4 and improving the reliability of the rock drill.

4. The inner annular water injection groove 515 of the quick-change water injection jacket 5 is provided with a first water seal 6 at both sides, so that flushing water is prevented from entering the head 4 of the rock drill, and the tail support sleeve 8 is provided with a second water seal 7, so that flushing water can be prevented from entering the rock drill body 9 after the first water seal 6 fails.

5. Front observing channel 513 and tail observing groove 514 are set at two ends of quick-change water jacket 5, front observing channel 513 and tail observing groove 514 are connected with front observing hole 42 and tail observing hole 44 of the machine head respectively, so that operator can timely detect and change water seal, and prevent wash water from invading other parts.

6. The quick-change water jacket 5 is provided with a front supporting sleeve 2, so that the offset load of the drill shank 1 can be prevented; the front support sleeve 2, the quick-change water injection sleeve 5 and the machine head 4 are provided with oil gas channels, so that lubrication can be carried out between the drill shank 1 and the front support sleeve 2; having the first oil-gas ring groove 41 and the second oil-gas ring groove 22 can ensure sufficient lubrication while improving the installation efficiency of the quick-change water jacket 5 and the front support sleeve 2.

7. The front supporting sleeve 2 is limited by adopting the snap ring 524, and the snap ring groove 523 and the snap ring dismounting hole 525 are arranged at the front end of the quick-change water injection sleeve 5, so that the snap ring 524 can be conveniently dismounted.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A quick-change water filling jacket of a rock drill is used for filling flushing water into a drill shank (1) arranged in a machine head (4), and is characterized in that,

Comprises a water jacket body (51) and a water jacket head (52) arranged on one end of the water jacket body (51),

An inner annular water injection groove (515) arranged on the inner wall of the water jacket body (51), an outer annular water injection groove (516) arranged on the outer wall of the water jacket body and water injection holes (517) used for communicating the inner annular water injection groove (515) and the outer annular water injection groove (516), first water seals (6) are arranged at two ends of the inner annular water injection groove (515), a drill shank water hole (11) communicated with the inner annular water injection groove (515) is formed in the drill shank (1),

One end of the water jacket body (51) far away from the water jacket head (52) is used for being inserted into the machine head (4), threads (511) used for connecting the machine head (4) are arranged on the outer wall of the water jacket body (51),

The water jacket head (52) is provided with a bayonet used for driving the water jacket body (51) to rotate.

2. The quick change water jacket of a rock drill as claimed in claim 1, wherein,

The bayonet is a blind hole (521) and/or a long groove (522), the axis of the blind hole (521) is distributed along the radial direction of the water jacket head (52), and the long groove (522) is distributed along the axial direction of the water jacket head (52).

3. A quick change water jacket for a rock drill as claimed in claim 1 or 2, characterized in that,

The outer diameter of the water jacket head (52) is larger than the outer diameter of the water jacket body (51).

4. A quick change water jacket for a rock drill as claimed in claim 3, characterized in that,

One end of the water jacket body (51) close to the water jacket head (52) is sleeved with a stop gasket (3) used for connecting the water jacket head (52) with the machine head (4).

5. The quick change water jacket of a rock drill as claimed in claim 4, wherein,

Anti-slip structures are uniformly distributed on the connecting surface of the water jacket head (52) and the stop gasket (3) and the connecting surface of the stop gasket (3) and the machine head (4).

6. A quick change water jacket for a rock drill as claimed in claim 1, 2, 4 or 5, characterized in that,

A front observing channel (513) is formed in one end, close to the water jacket head (52), of the water jacket body (51), and a tail observing groove (514) is formed in one end, far away from the water jacket head (52), of the water jacket body (51).

7. The quick change water jacket of a rock drill as claimed in claim 6, wherein,

The inner wall of the water jacket head (52) far away from one end of the water jacket body (51) is provided with a clamping ring groove (523), and a clamping ring (524) is arranged in the clamping ring groove (523).

8. The quick change water jacket of a rock drill as claimed in claim 7, wherein,

The end face of the water jacket head (52) far away from the water jacket body (51) is provided with a snap ring dismounting hole (525).

9. A rock drill, characterized by comprising a quick-change water jacket of the rock drill according to any one of claims 1 to 8,

The drill bit further comprises a machine head (4), a drill bit tail (1) arranged in the machine head (4), a front supporting sleeve (2) for supporting the front end of the drill bit tail (1), a tail supporting sleeve (8) for supporting the tail end of the drill bit tail (1) and a rock drill machine body (9) for driving the drill bit tail (1) to move,

The front support sleeve (2) is embedded in the quick-change water injection jacket of the rock drill, and a second water seal (7) is arranged on the inner wall of the tail support sleeve (8).

10. A rock drill as claimed in claim 9, characterized in that,

The front support sleeve (2) is provided with a first oil hole (21), and the water jacket body (51) is provided with a second oil hole (518) communicated with the first oil hole (21).