CN216642096U

CN216642096U - Water injection mechanism and rock drill

Info

Publication number: CN216642096U
Application number: CN202220144200.4U
Authority: CN
Inventors: 赵振国; 刘建; 杨贵龙; 吕桂梅
Original assignee: Zhangjiakou Xuanhua Huatai Mining & Metallurgic Machinery Co ltd
Current assignee: Zhangjiakou Xuanhua Huatai Mining & Metallurgic Machinery Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-05-31
Anticipated expiration: 2032-01-19

Abstract

The utility model provides a water injection mechanism and a rock drill, which comprise a frame, a drill shank, a mounting pin and a connecting seat, wherein the drill shank is arranged on the frame; the frame is provided with a movable cavity and a mounting channel communicated with the movable cavity; the drill bit shank is slidably arranged in the movable cavity in a penetrating manner, and a third water injection channel communicated with the movable cavity is formed in the drill bit shank; the mounting pin is inserted in the mounting channel in a sealing manner, and a first water injection channel communicated with the movable cavity is formed in the mounting pin; the connecting seat is formed with the second water injection passageway with first water injection passageway butt joint, and the connecting seat is used for restricting the displacement of installing the round pin in the outer end of installing the round pin, realizes being connected through flange structure between connecting seat and the frame, and the one end that first water injection passageway was kept away from to the second water injection passageway is used for being connected with the water injection pipe. The utility model ensures that the structural stability of the water inlet position is good, avoids water leakage at the water inlet position, optimizes the structure, improves the water injection efficiency and avoids water resource waste.

Description

Water injection mechanism and rock drill

Technical Field

The utility model belongs to the technical field of mining equipment, and particularly relates to a water injection mechanism and a rock drill.

Background

Rock drills are tools used to directly mine rock material. It can drill blast holes in rock stratum to put explosive to blast rock, so as to complete the exploitation of stone or other stone engineering. Furthermore, rock drills may also be used as breakers for breaking hard layers such as concrete. Rock drills can be classified into pneumatic rock drills, internal combustion rock drills, electric rock drills, hydraulic rock drills and the like according to power sources of the rock drills. The hydraulic rock drill impacts a steel chisel through an impact body by means of hydraulic pressure, and rock chiseling is achieved. As one of important engineering equipments, a hydraulic rock drill is indispensable for engineering construction in the fields of mines, highways, buildings, and the like.

The rock drilling machine mainly comprises an impact mechanism and a rotary mechanism, the rotary mechanism mainly comprises a drill rod tail and a rotary transmission mechanism, the drill rod tail axially reciprocates under the action of the impact mechanism, and rotates under the action of the rotary transmission mechanism, so that rock drilling is realized. In the process of rock drilling, water needs to be injected into a drilling position to wash out broken stones, sand and soil and other substances in a drilled hole, so that a water injection mechanism needs to be arranged on the rotary mechanism. The existing water injection mechanism is unreasonable in arrangement, the problem of loosening and water leakage easily occurs at the water inlet position, the water injection efficiency is influenced, and the water resource is wasted.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a water injection mechanism and a rock drill, and aims to optimize the structure of the water injection mechanism, avoid the condition that the water inlet position is loosened and leaks water, ensure the water injection efficiency and avoid the waste of water resources.

In order to achieve the purpose, the utility model adopts the technical scheme that:

in a first aspect, there is provided a water injection mechanism comprising:

the frame is provided with a movable cavity and a mounting channel communicated with the movable cavity;

the drill bit shank penetrates through the movable cavity in a sliding mode, and a third water injection channel communicated with the movable cavity is formed in the drill bit shank;

the mounting pin is inserted in the mounting channel in a sealing manner, and a first water injection channel communicated with the movable cavity is formed in the mounting pin; and

the connecting seat is formed with a second water injection channel in butt joint with the first water injection channel, the connecting seat is used for limiting the displacement of the mounting pin at the outer end of the mounting pin, the connecting seat is connected with the frame through a flange structure, and one end, far away from the first water injection channel, of the second water injection channel is used for being connected with a water injection pipe.

With reference to the first aspect, in a possible implementation manner, the flange structure includes a flange plate disposed on the connecting seat, the frame is formed with an attachment surface adapted to the attachment of the flange plate, an installation screw hole corresponding to the installation through hole in the flange plate is formed in the attachment surface, and the installation screw hole is connected to the installation through hole through a threaded connector.

With reference to the first aspect, in a possible implementation manner, a limiting protrusion is formed at an inner end of the mounting channel, and the limiting protrusion is used for limiting displacement of the mounting pin at the inner end of the mounting pin.

With reference to the first aspect, in a possible implementation manner, a first limiting groove adapted to the limiting protrusion is formed at an inner end of the mounting pin.

With reference to the first aspect, in a possible implementation manner, a sealing caulking groove is formed in an outer peripheral surface of the mounting pin, a sealing ring is arranged in the sealing caulking groove, and the sealing ring abuts against an inner wall of the mounting channel.

With reference to the first aspect, in a possible implementation manner, the sealing caulking grooves are provided in plurality, and the sealing caulking grooves are respectively provided at an inner end portion and an outer end portion of the mounting pin;

the sealing caulking groove at the inner end part of the mounting pin forms an inner groove group, the sealing caulking groove at the outer end part of the mounting pin forms an outer groove group, and a contraction ring groove distributed along the circumferential direction of the mounting pin is formed between the inner groove group and the outer groove group.

With reference to the first aspect, in a possible implementation manner, the outer end of the mounting pin extends out of the frame, and an outer limit groove in clamping fit with the outer end of the mounting pin is formed on the connecting seat;

in the outer groove group, the sealing ring in at least one sealing caulking groove is abutted against the side wall of the outer limiting groove.

With reference to the first aspect, in a possible implementation manner, the third water injection channel includes an axial channel section and a radial channel section that are communicated with each other, the axial channel section is coaxially disposed with the shank adapter, and the radial channel section is disposed along a radial direction of the shank adapter.

With reference to the first aspect, in a possible implementation manner, an expansion chamber is formed in an area, corresponding to the radial channel section, of the movable cavity, an inner diameter of the expansion chamber is larger than an inner diameter of the main body of the movable cavity, and the water outlet port of the first water injection channel is located on an outer peripheral surface of the expansion chamber.

Compared with the prior art, the scheme shown in the embodiment of the application has the advantages that the first water injection channel is formed in the manner that the mounting pins are inserted and connected, the positioning of the mounting pins and the connection with the water injection pipes are realized through the connecting seats, and the connecting seats are connected with the frame through the flange structures, so that the connecting seats are not easy to loosen in the working process, and then the mounting pins are not easy to loosen, and finally, the water inlet unit formed by the mounting pins and the connecting seats is good in structural stability, the water inlet unit is prevented from leaking water, and the water injection efficiency is improved; simultaneously, the adoption is seted up the third water injection channel within the bore bit tail, through with water through the leading-in activity chamber of the unit of intaking, can then be leading-in third water injection channel, through third water injection channel direction drilling rod, the rivers route sets up rationally, can be with the accurate leading-in drilling of water downtheholely, has improved water injection efficiency, avoids the water waste.

In a second aspect, the embodiment of the utility model further provides a rock drilling machine, which includes the water injection mechanism.

Compared with the prior art, the scheme shown in the embodiment of the application effectively avoids the water leakage problem of the water inlet position by adopting the water injection mechanism, improves the water injection efficiency, avoids water waste, and then improves the efficiency of drilling work.

Drawings

FIG. 1 is a schematic structural diagram of a water injection mechanism according to an embodiment of the present invention;

fig. 2 is a sectional view a-a of fig. 1.

Description of reference numerals:

100. a frame; 110. a movable cavity; 111. an expansion chamber; 120. installing a channel; 121. a limiting bulge;

200. a drill shank; 210. a third water injection channel; 211. an axial channel section; 212. a radial channel segment;

300. mounting a pin; 310. a first water injection passage; 320. a first limit groove; 330. sealing the caulking groove; 340. shrinking the ring groove;

400. a connecting seat; 410. a second water injection channel; 420. an outer limiting groove;

500. a flange structure; 510. a flange plate; 520. a binding face; 530. a threaded connection;

600. and (4) a sealing ring.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It should be noted that the term "inner end" in this application refers to the end adjacent to the movable chamber 110, and vice versa to the "outer end".

Referring to fig. 1 and fig. 2, a water injection mechanism according to the present invention will now be described. The water injection mechanism comprises a frame 100, a drill shank 200, a mounting pin 300 and a connecting seat 400; the frame 100 is formed with a movable chamber 110, and a mounting passage 120 communicating with the movable chamber 110; the drill bit 200 is slidably arranged in the movable cavity 110, and a third water injection channel 210 communicated with the movable cavity 110 is formed in the drill bit 200; the mounting pin 300 is hermetically inserted into the mounting channel 120, and a first water injection channel 310 communicated with the movable cavity 110 is formed in the mounting pin 300; the connection seat 400 is formed with a second water injection passage 410 butted with the first water injection passage 310, the connection seat 400 is used for limiting the displacement of the installation pin 300 at the outer end of the installation pin 300, the connection between the connection seat 400 and the frame 100 is realized through a flange structure 500, and one end of the second water injection passage 410, which is far away from the first water injection passage 310, is used for being connected with a water injection pipe.

Compared with the prior art, the water injection mechanism provided by the embodiment adopts the mode that the mounting pin 300 is inserted to form the first water injection channel 310, and realizes the positioning of the mounting pin 300 and the connection with a water injection pipe through the connecting seat 400, because the connecting seat 400 is connected with the frame 100 through the flange structure 500, in the working process, even if vibration and impact are experienced, the connecting seat 400 is not easy to loosen, then the mounting pin 300 is not easy to loosen, finally, the water inlet unit formed by the mounting pin 300 and the connecting seat 400 has good structural stability, the water leakage of the water inlet unit is avoided, and the water injection efficiency is improved; meanwhile, the third water injection channel 210 is arranged in the drill shank 200, water can be guided into the third water injection channel 210 by guiding the water into the movable cavity through the water inlet unit, the water flow channel is reasonable in arrangement when the drill rod is guided through the third water injection channel 210, the water can be accurately guided into the drilling hole, the water injection efficiency is improved, and the water waste is avoided.

During specific implementation, the end of intaking of connecting seat 400 passes through the helicitic texture and realizes being connected with the water injection pipe, perhaps, through inserting the structure soon and realize being connected with the water injection pipe. The connection between the connection socket 400 and the water injection pipe may be in a manner that can satisfy the requirement of the assembling performance, and is not limited to the above-described exemplary manner.

In addition, as shown in fig. 1 and fig. 2, the frame 100 in the present embodiment is exemplarily shown to be composed of a plurality of members, the frame 100 forms a foundation during the operation, and the position of the shank 300 is changed relative to the position of the frame 100, but the specific structure of the frame 100 can meet the requirements of the processing and the assembly, and is not limited herein.

In some embodiments, not shown, a plurality of guide spiral grooves are formed in the first water filling channel 310, and the plurality of guide spiral grooves are distributed along the circumference of the first water filling channel 310, so as to guide the water flow in the first water filling channel 310, avoid the generation of turbulent flow, and facilitate the formation of rotational flow in the first water filling channel 310, thereby increasing the water inlet pressure to some extent.

Referring to fig. 1 and 2, the flange structure 500 includes a flange 510 disposed on the connecting seat 400, the frame 100 is formed with an attaching surface 520 adapted to the flange 510, the attaching surface 520 is formed with mounting screw holes corresponding to the mounting through holes on the flange 510, and the mounting screw holes and the mounting through holes are connected by a screw connector 530. During the equipment, the ring flange 510 is connected through threaded connection 530 after laminating with binding face 520, because be the face contact between ring flange 510 and the frame 100, can effectively promote the leakproofness of being connected between ring flange 510 and the frame 100.

To further increase the sealing between the flange 510 and the frame 100, a gasket may be disposed between the flange 510 and the abutting surface 520. Specifically, one of the flange 510 and the attachment surface 520 may be provided with a sealing groove, a sealing gasket is disposed in the sealing groove, and the sealing gasket abuts against the other of the flange 510 and the attachment surface 520 to realize further sealing; or, an elastic layer can be formed on the attaching surface of the flange 510, and then the elastic layer can be directly abutted and sealed with the attaching surface 520, so that the abutting area is larger, and the sealing effect is better.

In some embodiments, referring to fig. 2, to avoid inserting the mounting pin 300 too far, the inner end of the mounting channel 120 is formed with a limiting protrusion 121, the limiting protrusion 121 serving to limit the displacement of the mounting pin 300 at the inner end of the mounting pin 300.

On the basis of the above embodiment, referring to fig. 2, the inner end of the mounting pin 300 is formed with a first limiting groove 320 adapted to the limiting protrusion 121. In this embodiment, the side wall of the first limiting groove 320 can cooperate with the limiting protrusion 121 to achieve limiting in the radial direction of the mounting pin 300, so as to better improve the reliability of assembly.

In specific implementation, the limiting protrusion 121 is an annular protrusion, the first limiting groove 320 is correspondingly configured as an annular groove, and the inner end of the mounting pin 300 is directly inserted into the central hole formed by the limiting protrusion 121, as shown in fig. 2.

More specifically, the side wall of the first limiting groove 320 is a tapered wall, and the diameter thereof gradually increases from the inner end to the outer end of the mounting pin 300; correspondingly, the inner annular surface of the limiting protrusion 121 is a tapered surface attached to the sidewall of the first limiting groove 320, and the diameter thereof gradually increases from the inner end to the outer end of the mounting pin 300. The arrangement mode can not only improve the reliability after assembly, but also realize the guiding function during assembly, and improve the convenience of assembly.

In some embodiments, referring to fig. 2, in order to ensure the sealing performance between the mounting pin 300 and the mounting channel 120 and facilitate assembly, the outer circumferential surface of the mounting pin 300 is provided with a sealing caulking groove 330, a sealing ring 600 is disposed in the sealing caulking groove 330, and the sealing ring 600 abuts against the inner wall of the mounting channel 120.

On the basis of the above embodiment, referring to fig. 2, a plurality of sealing caulking grooves 330 are provided, and the plurality of sealing caulking grooves 330 are respectively provided at the inner end portion and the outer end portion of the mounting pin 300; the sealing insert 330 at the inner end of the mounting pin 300 forms an inner groove set, the sealing insert 330 at the outer end of the mounting pin 300 forms an outer groove set, and a shrink ring groove 340 is formed between the inner groove set and the outer groove set and distributed along the circumference of the mounting pin 300. This embodiment makes the inner and the outer end homoenergetic of installing pin 300 form sealed cooperation, increases sealed cooperation point position, effectively promotes sealing performance.

Referring to fig. 2, the outer end of the mounting pin 300 extends out of the frame 100, and an outer limit groove 420 adapted to the outer end of the mounting pin 300 in a clamping manner is formed on the connecting seat 400; in the outer groove group, the sealing ring 600 in at least one sealing caulking groove 330 is abutted with the side wall of the outer limiting groove 420. In the embodiment, the outer end of the mounting pin 300 is inserted into the outer limiting groove 420, so that the radial limiting and the axial limiting between the connecting seat 400 and the mounting pin 300 are realized, meanwhile, the flange plate 510 on the connecting seat 400 is convenient to align with the mounting screw hole on the binding surface 520, and the mounting convenience is effectively improved; meanwhile, the sealing fit between the mounting pin 300 and the connecting seat 400 is also realized through the abutting of the sealing ring 600 and the side wall of the outer limit groove 420.

In some embodiments, referring to fig. 2, in order to reduce the difficulty of processing the third water injection channel 210 and ensure smooth water circulation, the third water injection channel 210 includes an axial channel section 211 and a radial channel section 212 which are communicated with each other, the axial channel section 211 is coaxially arranged with the shank adapter 200, and the radial channel section 212 is arranged along the radial direction of the shank adapter 200.

On the basis of the above embodiment, referring to fig. 2, the area of the movable chamber 110 corresponding to the radial passage section 212 forms the extension chamber 111, the inner diameter of the extension chamber 111 is larger than the inner diameter of the main body of the movable chamber 110, and the water outlet port of the first water injection passage 310 is located on the outer circumferential surface of the extension chamber 111. In this embodiment, by providing the expansion chamber 111, a receiving space capable of temporarily storing water is formed, the water pressure is increased, and it is ensured that water can continuously flow into the third water injection passage 210 within an arbitrary angle during the rotation of the shank 200.

It should be noted that the axial length of the expansion chamber 111 should be larger than the axial movement range of the shank adapter 200 to ensure that the water flow can continuously flow into the third water injection channel 210 at any position of the axial movement of the shank adapter 200.

Based on the same inventive concept, the embodiment of the application also provides a rock drill which comprises the water injection mechanism.

Compared with the prior art, the rock drill that this embodiment provided, through adopting foretell water injection mechanism, effectively avoid the problem that the position of intaking leaks, improved water injection efficiency, avoid water waste, improved the efficiency of drilling work then.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A water injection mechanism, comprising:

2. The water injection mechanism as claimed in claim 1, wherein the flange structure comprises a flange plate disposed on the connecting seat, the frame has a fitting surface fitted to the flange plate, the fitting surface has a mounting screw hole corresponding to the mounting through hole of the flange plate, and the mounting screw hole is connected to the mounting through hole by a screw connection member.

3. The water injection mechanism as claimed in claim 1, wherein the inner end of the mounting channel is formed with a limit protrusion for limiting displacement of the mounting pin at the inner end of the mounting pin.

4. The water injection mechanism as claimed in claim 3, wherein the inner end of the mounting pin is formed with a first limit groove adapted to the limit protrusion.

5. The water injection mechanism as claimed in claim 1, wherein a sealing caulking groove is formed on the outer peripheral surface of the mounting pin, a sealing ring is disposed in the sealing caulking groove, and the sealing ring abuts against the inner wall of the mounting channel.

6. The water injection mechanism of claim 5, wherein a plurality of said sealing caulking grooves are provided, and a plurality of said sealing caulking grooves are provided at the inner end portion and the outer end portion of said mounting pin, respectively;

7. The water injection mechanism as claimed in claim 6, wherein the outer end of the mounting pin extends out of the frame, and an outer limit groove in clamping fit with the outer end of the mounting pin is formed on the connecting seat;

8. The water injection mechanism as claimed in claim 1, wherein the third water injection channel comprises an axial channel section and a radial channel section communicating with each other, the axial channel section being arranged coaxially with the shank adapter, and the radial channel section being arranged in a radial direction of the shank adapter.

9. The water injection mechanism as claimed in claim 8, wherein an area of the movable chamber corresponding to the radial passage section forms an expansion chamber, an inner diameter of the expansion chamber is larger than an inner diameter of the main body of the movable chamber, and the water outlet port of the first water injection passage is located on an outer circumferential surface of the expansion chamber.

10. A rock drill comprising a water injection mechanism as claimed in any one of claims 1 to 9.