CN211230224U

CN211230224U - Pneumatic impactor

Info

Publication number: CN211230224U
Application number: CN201922116390.XU
Authority: CN
Inventors: 董全文; 张飞; 李淑梅; 董彩霞
Original assignee: XUANHUA SUPERMAN DTH MACHINERY CO Ltd
Current assignee: XUANHUA SUPERMAN DTH MACHINERY CO Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-08-11
Anticipated expiration: 2029-11-29

Abstract

The utility model provides a pneumatic impacter belongs to impact tool technical field, including the outer tube, the one end of outer tube is connected with the joint, the other end is connected with interior sleeve pipe, it is equipped with the drill rod to slide in the interior sleeve pipe, the front end of drill rod is equipped with the drill bit, the inner chamber self-connection one end of outer tube is equipped with the check valve that is used for airtight joint in proper order, with the distribution seat of check valve cooperation installation and with the cylinder of the inner wall cooperation installation of outer tube, be equipped with in the cylinder and be used for striking the terminal piston of drill rod, a serial communication port, the drill rod penetrates the one end of outer tube and is equipped with the threaded rod, the regulation fender ring is installed to the screw thread on the threaded rod, the external diameter of regulation fender ring is greater than interior. The utility model provides a pneumatic impacter has saved run from opposite directions the snap ring and has been used for the fixed spare part of running from opposite directions the ring, simple structure, and bore bit stroke control is convenient.

Description

Pneumatic impactor

Technical Field

The utility model belongs to the technical field of impact tool, more specifically say, relate to a pneumatic impacter.

Background

The pneumatic hammer is an important component of down-the-hole drill and belongs to the working device of down-the-hole drill, the high wind pressure hammer used at present is composed of cylinder, piston outer sleeve, joint, inner sleeve and drill rod, the drill bit is arranged at the front end of the drill rod and is a part directly contacted with rock, and the drill bit is driven to impact the rock under the reciprocating motion of the piston in the hammer. In order to ensure the reciprocating motion of the drill bit, a connecting sleeve is required to be arranged on the drill rod and is connected and arranged at the lower end of the piston outer sleeve, an annular groove is formed in the drill rod, and a clamping ring is arranged in the piston outer sleeve and is clamped in the annular groove, so that the reciprocating motion stroke of the drill rod is ensured. However, when the structure is adopted, the snap ring needs to be made into a split form, and parts matching with the reciprocating motion part of the drill rod are more, so that the structure is complex. In addition, when the air pressure changes, the requirements of high pressure and low pressure on the reciprocating stroke of the drill rod are different, the impactors with different drill rod strokes need to be replaced, and the operation is very complicated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pneumatic impacter, the spare part of the drill rod reciprocating motion who aims at solving pneumatic impacter is more, and the structure is complicated, and the drill rod stroke is difficult to the problem of adjusting.

In order to achieve the above object, the utility model adopts the following technical scheme: provides a pneumatic impactor, which comprises an outer sleeve, wherein one end of the outer sleeve is connected with a joint, the other end of the outer sleeve is connected with an inner sleeve, a drill rod is arranged in the inner sleeve in a sliding manner, a drill bit is arranged at the front end of the drill rod, a check valve for sealing the joint, a gas distribution seat matched with the check valve and a cylinder matched with the inner wall of the outer sleeve are sequentially arranged in the inner cavity of the outer sleeve from one end of the joint, a piston used for impacting the tail end of the drill rod is arranged in the cylinder, a guide sleeve used for guiding the piston is arranged in the outer sleeve, a threaded rod is arranged at one end of the drill rod penetrating into the outer sleeve, an adjusting stop ring is arranged on the threaded rod in a threaded manner, the outer diameter of the adjusting stop ring is larger than the inner diameter of the inner sleeve, and the adjusting stop ring rotates along the threaded rod and is used for adjusting the distance between the adjusting stop ring and the inner sleeve.

As another embodiment of the present application, the diameter of the threaded rod is smaller than the diameter of the drill rod, and the drill rod and the threaded rod form a step for limiting a downward movement distance of the adjustment stop ring.

As another embodiment of this application, the cover is equipped with the packing ring on the threaded rod, the packing ring passes through the regulation keep off the ring compress tightly in on the stair platform, be equipped with lock nut on the regulation keep off the ring, lock nut threaded mounting is on the threaded rod.

As another embodiment of the application, the quantity of the washers is multiple, the washers are sequentially sleeved on the threaded rod, and the washers are pressed on the step platforms through the adjusting baffle rings.

As another embodiment of the present application, a plurality of slide rails are arranged on the outer wall of the drill rod in the circumferential direction, a plurality of slide ways for being matched with the plurality of slide rails are arranged on the inner wall of the inner sleeve in the circumferential direction, and the drill rod is slidably arranged in the inner sleeve through the matching of the slide ways and the slide rails.

As another embodiment of the present application, the outer diameter of the bit is larger than the inner diameter of the inner sleeve.

As another embodiment of the application, the joint is provided with a central hole for introducing gas, and the check valve and the conical surface of the central hole are sealed.

As another embodiment of the application, the piston and the drill rod are provided with exhaust holes along the axial direction.

The utility model provides a pneumatic impacter's beneficial effect lies in: compared with the prior art, the utility model discloses pneumatic impacter, when the installation drill rod, wear the dress earlier at the drill rod in the endotheca intraductally, the drill rod is equipped with the one end of threaded rod and wears out interior sleeve pipe, and threaded mounting goes up the regulation and keeps off the ring on the threaded rod, because the external diameter of adjusting to keep off the ring is greater than interior sheathed tube internal diameter, the external diameter of bore bit is greater than interior sheathed tube internal diameter, interior sleeve pipe can keep off along drill rod relative slip between ring and the bore bit adjusting. The inner sleeve is arranged at one end of the outer sleeve, at the moment, the reciprocating stroke of the drill rod is the distance between the adjusting stop ring and the drill bit, the adjusting stop ring is rotated along the threaded rod, the adjusting stop ring moves along the axial direction of the threaded rod, the distance between the adjusting stop ring and the drill bit can be adjusted, and the reciprocating stroke of the drill rod is adjusted. The split snap ring and parts for fixing the split ring are omitted, the structure is simple, and the stroke of the drill bit is convenient to adjust.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a pneumatic impactor provided in an embodiment of the invention;

fig. 2 is an enlarged view at a in fig. 1.

In the figure: 1. an outer sleeve; 2. a joint; 3. an inner sleeve; 4. a drill rod; 5. a drill bit; 6. a check valve; 7. a gas distribution base; 8. a cylinder; 9. a piston; 10. a threaded rod; 11. adjusting the baffle ring; 12. a stair step; 13. a gasket; 14. locking the nut; 15. a slide rail; 16. a slideway; 17. a central bore; 18. an exhaust hole; 19. and a guide sleeve.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and 2, the pneumatic impactor of the present invention will now be described. Pneumatic impacter, including outer tube 1, the one end of outer tube 1 is connected with and connects 2, the other end is connected with interior sleeve pipe 3, interior sleeve pipe 3 slides and is equipped with drill rod 4, the front end of drill rod 4 is equipped with drill bit 5, the inner chamber of outer tube 1 is equipped with the check valve 6 that is used for airtight joint 2 from 2 one end in proper order, with the distribution seat 7 of check valve 6 cooperation installation and with the cylinder 8 of the inner wall cooperation installation of outer tube 1, be equipped with in the cylinder 8 and be used for striking the terminal piston 9 of drill rod 4, be equipped with the uide bushing 19 that is used for guide piston 9 in the outer tube 1, the one end that drill rod 4 penetrated outer tube 1 is equipped with threaded rod 10, threaded rod 10 goes up the screw thread and installs regulation fender ring 11, the external diameter of regulation fender ring 11 is greater than the internal diameter of inner tube 3, regulation.

The utility model provides a pneumatic impacter, compared with the prior art, when installation drill rod 4, wear the dress earlier in interior sleeve pipe 3 with drill rod 4, interior sleeve pipe 3 is worn out to the one end that drill rod 4 was equipped with threaded rod 10, and threaded mounting goes up regulation fender ring 11 on threaded rod 10, because the external diameter of adjusting fender ring 11 is greater than interior sleeve pipe 3's internal diameter, the external diameter of bore bit 5 is greater than interior sleeve pipe 3's internal diameter, interior sleeve pipe 3 can be adjusted and keep off ring 11 and bore bit 5 between along drill rod 4 relative slip. The inner sleeve 3 is arranged at one end of the outer sleeve 1, at the moment, the reciprocating stroke of the drill rod 4 is the distance between the adjusting stop ring 11 and the drill bit 5, the adjusting stop ring 11 is rotated along the threaded rod 10, the adjusting stop ring 11 moves along the axial direction of the threaded rod 10, and the distance between the adjusting stop ring 11 and the drill bit 5 can be adjusted, namely the reciprocating stroke of the drill rod 4 is adjusted. The split snap ring and parts for fixing the split ring are omitted, the structure is simple, and the stroke of the drill bit 5 is convenient to adjust.

As a specific embodiment of the pneumatic impactor provided by the present invention, please refer to fig. 2, the diameter of the threaded rod 10 is smaller than the diameter of the drill rod 4, and the drill rod 4 and the threaded rod 10 form a step platform 12 for limiting the downward moving distance of the adjusting stop ring 11. In this embodiment, when the adjusting stop ring 11 rotates to the step 12 along the threaded rod 10, the adjusting stop ring 11 cannot go down further along the threaded rod 10 due to the blocking of the step 12. At this time, the reciprocating stroke of the drill rod 4 is shortest, the distance is the minimum reciprocating stroke of the drill rod 4, the step platform 12 provides the adjusting stop ring 11 with a limit for moving downwards along the threaded rod 10, and the situation that the adjusting stop ring 11 moves downwards along the threaded rod 10 too much to cause the reciprocating stroke of the drill rod 4 to be too small, so that the drill bit 5 at the front end of the drill rod 4 cannot obtain effective impact force is avoided.

As a specific implementation manner of the pneumatic impactor provided by the present invention, please refer to fig. 2, the threaded rod 10 is sleeved with a washer 13, the washer 13 is pressed on the step platform 12 through the adjusting stop ring 11, the adjusting stop ring 11 is provided with a locking nut 14, and the locking nut 14 is installed on the threaded rod 10 in a threaded manner. In this embodiment, the washer 13 is sleeved between the step platform 12 and the adjusting stop ring 11, the thickness of the washer 13 can provide a limit for the downward movement of the adjusting stop ring 11 along the threaded rod 10, and the stroke of the reciprocating motion of the drill rod 4 can be increased by adding the washer 13 or replacing the washer 13 with a larger thickness. The locking nut 14 is pressed on the adjusting stop ring 11 to ensure the stability of the adjusting stop ring 11 and prevent the adjusting stop ring 11 from being displaced due to the impact of the end surface of the inner sleeve, thereby changing the stroke of the reciprocating motion of the drill rod 4.

As a specific embodiment of the pneumatic impactor provided by the present invention, please refer to fig. 2, the number of the washers 13 is plural, and the washers are sequentially sleeved on the threaded rod 10 and pressed on the step platform 12 by the adjusting stop ring 11. In the embodiment, the distance between the adjusting baffle ring 11 and the drill bit 5 is increased by overlapping the gasket 13, so that the stroke of the drill rod 4 reciprocating along the inner sleeve 3 is improved.

Optionally, the washer 13 is made of a rigid material, such as a stainless steel member, so that the strength of the washer can be ensured, and the adjustment of the reciprocating stroke of the drill rod 4 can be completed by replacing washers 13 with different thicknesses; the adjustment of the stroke of the reciprocating movement of the drill rod 4 can also be accomplished by superimposing washers 13 of different thickness or of the same thickness.

Optionally, the washer 13 is made of an elastic material, such as rubber, and when the adjusting stop ring 11 is pressed by the lock nut 14, the washer 13 may be compressed under pressure, so that the stability of the adjusting stop ring 11 can be increased while the adjustment of the reciprocating stroke of the drill rod 4 can be adjusted, and the adjusting stop ring 11 is prevented from generating relative displacement when colliding with the end surface of the inner sleeve 3.

As a specific implementation manner of the pneumatic impactor provided by the present invention, please refer to fig. 1, the circumference of the outer wall of the drill rod 4 is provided with a plurality of slide rails 15, the circumference of the inner wall of the inner casing 3 is provided with a plurality of slide ways 16 for cooperating with the plurality of slide rails 15, and the drill rod 4 is slidably disposed in the inner casing 3 through the cooperation of the slide ways 16 and the slide rails 15. In this embodiment, the slide rails 15 extend in the axial direction of the drill rod 4, the slide ways 16 extend along the axis of the inner sleeve 3, and the slide ways 16 slide in cooperation with the slide rails 15. Optionally, the slide rail 15 may be disposed in the circumferential direction of the inner wall of the inner sleeve 3, and the slide rail 16 is disposed in the circumferential direction of the outer wall of the drill rod 4, so that the drill rod 4 slides along the inner cavity of the inner sleeve 3 through sliding fit of the two.

As a specific embodiment of the pneumatic impactor provided by the present invention, please refer to fig. 1, the outer diameter of the bit 5 is larger than the inner diameter of the inner sleeve 3. In the embodiment, the drill bit 5 is clamped on the outer side of the inner sleeve 3 and cannot be drawn into the inner sleeve 3 due to external impact, so that the distance of the drill rod 4 drawn into the inner sleeve 3 is limited, and the damage to the piston 9 or the cylinder 8 caused by the fact that the drill rod 4 repeatedly impacts the end part of the piston 9 is avoided.

Referring to fig. 1, the joint 2 is provided with a center hole 17 for introducing gas, and the check valve 6 and the center hole 17 are sealed by a conical surface. In this embodiment, the connector 2 is externally connected with an air source, and enters the inner cavity of the outer sleeve 1 through the central hole 17 to provide high-pressure air for the cylinder 8, so that the cylinder 8 continuously drives the piston 9 to reciprocate and continuously impact the drill rod 4. The check valve 6 and the conical surface of the central hole 17 are sealed, so that an air source can enter the inner cavity of the outer sleeve 1 through the check valve 6 without leaking from the central hole 17, the sealing of the air cylinder 8 is ensured, and the air cylinder 8 can be continuously supplied with high-pressure air.

Referring to fig. 1, the piston 9 and the drill rod 4 are both provided with an exhaust hole 18 along the axial direction, as a specific embodiment of the pneumatic impactor provided by the present invention. In this embodiment, the gas can be discharged from the piston 9 and the drill rod 4, so as to prevent the occurrence of a gas-holding phenomenon at the end of the outer sleeve 1 where the drill rod 4 is arranged, thereby affecting the reciprocating motion of the piston 9.

The installation regulation and the working process of the device are as follows:

firstly, the check valve 6 is installed on the gas distribution seat 7, the gas distribution seat 7 is installed at the upper end of the cylinder 8, the piston 9 is installed at the lower end of the cylinder 8, the installed equipment is sleeved in the outer sleeve 1 from top to bottom, and the joint 2 is installed at one end of the outer sleeve 1 through threads.

Then, the drill rod 4 is arranged on the inner sleeve 3 in a penetrating mode from bottom to top until a drill bit 5 at the lower end of the drill rod 4 abuts against one end face of the inner sleeve 3, at the moment, a threaded rod 10 at the upper end of the drill rod 4 penetrates out of the inner sleeve 3, a gasket 13 with proper thickness is installed according to the required reciprocating stroke of the drill rod 4, the gasket 13 is sleeved on the threaded rod 10 from top to bottom, the gasket 13 abuts against a stepped platform 12, an adjusting stop ring 11 is installed through threads, after the gasket 13 is tightly pressed by the adjusting stop ring 11, a locking nut 14 is installed on the threaded rod 10 in a threaded mode from top to bottom, and the locking nut 14 is continuously rotated until the adjusting stop. Thereby completing the final fixing of the adjustment ring 11. The inner sleeve 3 is arranged at the other end of the outer sleeve 1 from bottom to top through threads.

Finally, the joint 2 is connected to an air source and is mounted on the driving end of a driving device, which is generally a motor, to drive the entire impactor to rotate and feed forward, drilling through the bit 5 at the end. The air source pushes the check valve 6 open through the central hole 17, high-pressure gas enters the cylinder 8 through the gas distribution seat 7, the cylinder 8 drives the piston 9 to reciprocate along the axial motion of the outer sleeve 1, the end part of the piston 9 continuously impacts the drill rod 4, and the drill rod 4 transmits impact force to the drill bit 5, so that the drill bit 5 can drill holes more easily.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The pneumatic impactor comprises an outer sleeve, one end of the outer sleeve is connected with a connector, the other end of the outer sleeve is connected with an inner sleeve, a drill rod is arranged in the inner sleeve in a sliding manner, a drill bit is arranged at the front end of the drill rod, a check valve for sealing the joint, a gas distribution seat matched with the check valve and a cylinder matched with the inner wall of the outer sleeve are sequentially arranged in the inner cavity of the outer sleeve from one end of the joint, a piston used for impacting the tail end of the drill rod is arranged in the cylinder, a guide sleeve used for guiding the piston is arranged in the outer sleeve, it is characterized in that one end of the drill rod penetrating into the outer sleeve is provided with a threaded rod, the threaded rod is provided with an adjusting baffle ring through threads, the outer diameter of the adjusting stop ring is larger than the inner diameter of the inner sleeve, and the adjusting stop ring rotates along the threaded rod and is used for adjusting the distance between the adjusting stop ring and the inner sleeve.

2. A pneumatic impactor as claimed in claim 1, wherein the diameter of the threaded rod is smaller than the diameter of the drill rod, the drill rod and the threaded rod forming a step for limiting the downward travel distance of the adjustment stop ring.

3. The pneumatic impactor as defined in claim 2, wherein the threaded rod is sleeved with a washer, the washer is pressed against the step by the adjusting stop ring, the adjusting stop ring is provided with a lock nut, and the lock nut is threadedly mounted on the threaded rod.

4. The pneumatic impactor as defined in claim 3, wherein a plurality of washers are sequentially sleeved on the threaded rod and pressed against the step by the adjustable stop ring.

5. A pneumatic impactor as defined in claim 1, wherein said drill rod has a plurality of sliding tracks along the circumference of its outer wall, and said inner sleeve has a plurality of sliding tracks along the circumference of its inner wall for engaging with said plurality of sliding tracks, said drill rod being slidably disposed within said inner sleeve by engagement of said sliding tracks with said sliding tracks.

6. A pneumatic impactor according to claim 1, wherein the bit has an outer diameter greater than the inner diameter of the inner sleeve.

7. The pneumatic impactor of claim 1, wherein said fitting has a central bore for admitting gas, and said check valve is conically sealed to said central bore.

8. A pneumatic impactor as claimed in claim 1, wherein the piston and the shank are each provided with axial venting holes.