CN217681565U

CN217681565U - Guiding mechanism for down-the-hole hammer

Info

Publication number: CN217681565U
Application number: CN202222047936.2U
Authority: CN
Inventors: 董全文; 张飞
Original assignee: XUANHUA SUPERMAN DTH MACHINERY CO Ltd
Current assignee: XUANHUA SUPERMAN DTH MACHINERY CO Ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2022-10-28
Anticipated expiration: 2032-08-04

Abstract

The utility model provides a guiding mechanism for down-the-hole impacter belongs to drilling machinery technical field, including transmission connecting axle and direction joint, be equipped with first air vent on the transmission connecting axle, first linkage segment and second linkage segment, still be equipped with the venthole of being connected with first air vent on the transmission connecting axle, still be equipped with transmission portion on the transmission connecting axle, be equipped with the ring channel on the lateral surface of transmission connecting axle, the ring channel is located the top of transmission portion, and be used for and the terminal surface inclined hole intercommunication on the drill bit, be equipped with the second air vent that runs through on the direction joint, the second linkage segment is connected with the direction joint, and the second air vent is linked together with first air vent, the one end that the transmission connecting axle was kept away from to the direction joint is used for being connected with the air supply. The utility model provides a guiding mechanism for down-the-hole impacter leads to the drill bit reaming of down-the-hole impacter under the effect of direction joint along the hole motion, and direction and reaming operation can not influence each other and relatively independently go on, and work efficiency is higher.

Description

Guiding mechanism for down-the-hole hammer

Technical Field

The utility model belongs to the technical field of the drilling machine, more specifically says, relates to a guiding mechanism for down-the-hole hammer.

Background

The down-the-hole hammer is widely applied to the hole forming operation of mines and projects such as water conservancy, hydropower, highways, railways, national defense, buildings and the like which are not busy in metallurgy, coal, chemical engineering and building materials, is suitable for dry-type, wind-water mixing and blast hole water burst wet-type operation, and has reliable working performance.

New underground utility pipes are typically installed using traditional open air methods, sometimes causing environmental impact or damage to existing infrastructure (e.g., roads and other surface structures); in addition, the installation of pipelines under water bodies such as rivers and lakes in open building construction also faces challenges. At present, a combined cone reamer is used more during reaming, but the efficiency is low, and the construction requirement cannot be met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a guiding mechanism for down-the-hole impacter to solve the lower technical problem of combination roller reamer work efficiency who exists among the prior art.

In order to achieve the above object, the utility model adopts the following technical scheme: the guide mechanism for the down-the-hole hammer comprises a transmission connecting shaft and a guide joint, wherein the transmission connecting shaft is used for being installed in the down-the-hole hammer, a first vent hole which penetrates through the transmission connecting shaft along the axial direction is formed in the transmission connecting shaft, a first connecting section which is used for being connected with a rear joint of the down-the-hole hammer is arranged on the outer side face of the upper end of the transmission connecting shaft, a second connecting section is arranged on the outer side face of the lower end of the transmission connecting shaft, and the lower end of the transmission connecting shaft extends out of the down-the-hole hammer; the transmission connecting shaft is also provided with an air outlet hole connected with the first vent hole, and the air outlet hole is arranged close to the first connecting section; the transmission connecting shaft is also provided with a transmission part for transmission connection with the drill bit, and the transmission part is arranged close to the second connecting section; the drill bit is characterized in that an annular groove is formed in the outer side face of the transmission connecting shaft, the annular groove is located above the transmission portion and is used for communicating with an inclined hole in the end face of the drill bit, a through second vent hole is formed in the guide joint, the second connecting section is connected with the guide joint, the second vent hole is communicated with the first vent hole, and the guide joint is far away from one end of the transmission connecting shaft and is used for being connected with an air source.

In a possible implementation manner, the first vent hole comprises a straight hole section, a conical hole section and an accommodating hole section which are sequentially arranged from bottom to top, the aperture of the accommodating hole section is larger than that of the straight hole section, and the air outlet hole is communicated with the accommodating hole section; the accommodating hole section and the taper hole section are used for installing a check valve.

In a possible implementation manner, the air outlet holes are multiple and are uniformly distributed around the first vent hole.

In a possible implementation manner, the first connecting section and the second connecting section are both external thread sections, and screw holes in threaded connection with the first connecting section and the second connecting section are respectively formed in the rear joint and the guide joint.

In a possible implementation manner, the transmission part is provided with four transmission surfaces which are perpendicular to each other, and the four transmission surfaces are arranged around the first vent hole; the drill bit is provided with square holes connected with the four transmission surfaces.

In a possible implementation manner, a sealing structure used for being connected with the inner wall of the cylinder in a sealing manner is further arranged on the outer side face of the transmission connecting shaft, and the sealing structure is located on one side, away from the first connecting section, of the air outlet hole.

In one possible implementation, the sealing structure includes a plurality of sealing grooves and a sealing ring installed in each sealing groove.

In a possible implementation manner, the guide joint comprises a connecting column and a conical end installed at one end of the connecting column, an internal thread section is arranged on the inner wall of the second ventilation hole in the connecting column, and the internal thread section is used for being in threaded connection with the second connecting section.

In a possible implementation manner, the conical end and the connecting column are of a stepped structure, one end of the connecting column is provided with a plurality of protrusions arranged around the conical end, and the protrusions are used for crushing leaked slag.

In one possible implementation, the connecting column and the conical end head are integrally formed; the bulge is an alloy column and is arranged obliquely outwards.

The utility model provides a guiding mechanism for down-the-hole hammer's beneficial effect lies in: compared with the prior art, the guide mechanism for the down-hole hammer of the utility model has the advantages that the transmission connecting shaft is arranged in the down-hole hammer, the transmission connecting shaft passes through the cylinder and the piston and is connected with the rear joint by the first connecting section, the transmission part is connected with the drill bit, and then the guide joint is connected with the second connecting section; during the use, with the one end of direction joint entering hole to be connected through the air supply of trachea and the other end, start the air supply and make high-pressure gas pass first air vent, second air vent and open the check valve in proper order, gas enters into between down-the-hole impacter outer wall and the cylinder from the venthole afterwards, and then enters into the below of piston again, makes piston below and below atmospheric pressure change, makes piston reciprocating motion in the cylinder and impact the drill bit, and the back connects the rotation and drives transmission connecting axle and drill bit rotation, controls the drill bit and carries out the reaming operation. Through this kind of mode, provide the moment of torsion for the drill bit with the help of the transmission connecting axle, and in high-pressure gas enters into down-the-hole impacter from the direction joint, lead to the drill bit reaming of down-the-hole impacter under the effect that the direction joint moved along the hole, direction and reaming operation can not influence each other and relatively independently go on, work efficiency is higher.

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 introduced 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 inventive labor.

Fig. 1 is a schematic structural view of a transmission connecting shaft provided by an embodiment of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 4 is a schematic structural diagram of a guiding joint provided by an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a guide mechanism for a down-the-hole hammer according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1. a transmission connecting shaft; 11. a first vent hole; 111. a straight hole section; 112. a tapered bore section; 113. a receiving bore section; 12. a first connection section; 13. a second connection section; 14. an air outlet; 15. a transmission part; 151. a driving surface; 16. an annular groove; 2. a guide joint; 21. a second vent hole; 22. connecting columns; 23. a tapered end; 24. a boss portion; 3. a sealing structure; 31. sealing the groove; 32. and (5) sealing rings.

Detailed Description

In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 5, a guiding mechanism for a down-the-hole hammer according to the present invention will now be described. A kind of down-the-hole impacter uses the guiding mechanism, including driving connecting axle 1 and guide joint 2, the driving connecting axle 1 is used for installing in the down-the-hole impacter, drive the first air vent 11 equipped with and run through the arrangement axially on the connecting axle 1, there is first linkage segment 12 used for connecting with back joint of the down-the-hole impacter on the lateral surface of upper end, there is second linkage segment 13 on the lateral surface of lower end, and the lower end stretches out of the down-the-hole impacter; the transmission connecting shaft 1 is also provided with an air outlet 14 connected with the first vent hole 11, and the air outlet 14 is arranged close to the first connecting section 12; the transmission connecting shaft 1 is also provided with a transmission part 15 for transmission connection with the drill bit, and the transmission part 15 is arranged close to the second connecting section 13; the outer side surface of the transmission connecting shaft 1 is provided with an annular groove 16, the annular groove 16 is located above the transmission part 15 and is used for being communicated with an end surface inclined hole on a drill bit, a second through hole 21 penetrating through the annular groove is formed in the guide joint 2, the second connecting section 13 is connected with the guide joint 2, the second through hole 21 is communicated with the first through hole 11, and one end, far away from the transmission connecting shaft 1, of the guide joint 2 is used for being connected with an air source.

Compared with the prior art, the guiding mechanism for the down-the-hole hammer provided by the utility model has the advantages that the transmission connecting shaft 1 is installed in the down-the-hole hammer, the transmission connecting shaft 1 passes through the cylinder and the piston and is connected with the rear joint by the aid of the first connecting section 12, is connected with the drill bit by the aid of the transmission part 15, and then the guiding joint 2 is connected with the second connecting section 13; during the use, with the one end of direction joint 2 entering hole to be connected with the air supply of the other end through the trachea, start the air supply and make high-pressure gas pass first air vent 11, second air vent 21 and open the check valve in proper order, gas enters into between down-the-hole impacter outer wall and the cylinder from venthole 14 afterwards, and then enters into the below of piston again, makes piston top and bottom atmospheric pressure change, makes piston reciprocating motion in the cylinder and impact the drill bit, and the back joint rotates and drives transmission connecting axle 1 and drill bit rotation, controls the drill bit and carries out the reaming operation. Through this kind of mode, provide the moment of torsion for the drill bit with the help of transmission connecting axle 1, and in high-pressure gas enters into down-the-hole impacter from direction joint 2, guide the drill bit reaming of down-the-hole impacter under the effect that direction joint 2 moved along the hole, direction and reaming operation can not influence each other and relatively independently go on, work efficiency is higher.

The piston is provided with a through sliding hole, the outer side surface of the transmission connecting shaft 1 is provided with a sliding surface in sliding fit with the sliding hole, and high-pressure gas enters the cylinder below the piston to push the piston to move upwards away from the drill bit, so that the change is realized. A ventilation gap is formed between the annular groove 16 on the transmission connecting shaft 1 and the central hole of the drill bit, and when high-pressure gas enters the lower part of the piston and pushes the piston to move upwards, the gas flows into the inclined hole on the end face from the ventilation gap in the central hole of the drill bit and is discharged.

Referring to fig. 1, as a specific embodiment of the guiding mechanism for a down-the-hole hammer of the present invention, the first vent hole 11 includes a straight hole section 111, a tapered hole section 112 and a receiving hole section 113, which are sequentially disposed from bottom to top, the aperture of the receiving hole section 113 is larger than that of the straight hole section 111, and the air outlet 14 is communicated with the receiving hole section 113; the accommodating hole section 113 and the taper hole section 112 are used for installing a check valve; hold hole section 113 and be located the upper end of transmission connecting axle 1, the taper hole section is used for the transition to hold hole section 113 to straight hole section 111, and the check valve is installed in holding hole section 113, and outer wall and taper hole section laminate closely. After the high-pressure gas source is started, the gas passes through the straight hole section 111 and pushes the open-stop valve, so that the gas enters the accommodating hole section 113 and passes through the gas outlet 14. The valve seat of the check valve is arranged on the rear joint.

Referring to fig. 1 and 3, as a specific embodiment of the guiding mechanism for the down-the-hole hammer of the present invention, a plurality of air outlets 14 are uniformly distributed around the first air vent 11; the provision of a plurality of outlet holes 14 allows high pressure gas to enter uniformly and rapidly from the first vent holes 11 into the gap between the cylinder and the outer barrel of the down-the-hole impactor. The number of the air outlet holes 14 is six, and the air outlet holes are uniformly distributed along the circumferential direction of the transmission connecting shaft 1.

Referring to fig. 1, 4 and 5, as a specific embodiment of the guiding mechanism for a down-the-hole hammer of the present invention, the first connecting section 12 and the second connecting section 13 are both external thread sections, and the rear joint and the guiding joint 2 are respectively provided with screw holes in threaded connection with the first connecting section 12 and the second connecting section 13; namely, after the transmission connecting shaft 1 is installed in the down-the-hole hammer, the first connecting section 12 at the upper end of the transmission connecting shaft 1 is in threaded connection with the screw hole at the lower end of the rear joint, and the second connecting section 13 at the lower end of the transmission connecting shaft 1 is in threaded connection with the screw hole on the guide joint 2, so that the installation and fixation of the whole guide mechanism are completed. The mode is simple and convenient to install.

Referring to fig. 1, 2 and 5, as a specific embodiment of the guiding mechanism for a down-the-hole hammer of the present invention, the transmission portion 15 is four transmission surfaces 151 perpendicular to each other, and the four transmission surfaces 151 are disposed around the first vent hole 11; the drill bit is provided with square holes connected with the four transmission surfaces 151; after the transmission connecting shaft 1 is installed in the down-the-hole hammer, the first connecting section 12 is connected with the rear joint, then the guide sleeve, the front joint and the drill bit are installed, the drill bit is sleeved on the transmission connecting shaft 1, the square hole in the drill bit is installed with the transmission surface 151 on the transmission connecting shaft 1 in a matched mode, and under the action of the transmission surface 151 and the inner hole wall of the square hole, the transmission connecting shaft 1 transmits power to the drill bit, so that the drill bit rotates.

Referring to fig. 1 and 5, as a specific embodiment of the guiding mechanism for a down-the-hole hammer according to the present invention, a sealing structure 3 for sealing connection with the inner wall of the cylinder is further disposed on the outer side surface of the transmission connecting shaft 1, and the sealing structure 3 is located on a side of the air outlet 14 away from the first connecting section 12; after the transmission connecting shaft 1 penetrates into the down-the-hole hammer, the first connecting section 12 is connected with the rear joint, and the sealing structure 3 is installed in a matching mode with the inner wall of the air cylinder below the rear joint, so that sealing connection is formed, the phenomenon of air leakage after the air leakage does not occur, and the piston can stably and efficiently move up and down.

Referring to fig. 1 and 5, as a specific embodiment of the guiding mechanism for a down-the-hole hammer according to the present invention, the sealing structure 3 includes a plurality of sealing grooves 31 and sealing rings 32 installed in the sealing grooves 31; the sealing groove 31 is opened on the outer wall of the transmission connecting shaft 1 along the circumferential direction, and the sealing ring 32 is installed in the sealing groove 31 to form the sealing structure 3. In the working process, the transmission connecting shaft 1 rotates, and the sealing connection of the transmission connecting shaft 1 which rotates at high speed and high pressure can be well completed by the sealing ring 32. The seal ring 32 can be made of heat-resistant fluororubber and wear-resistant urethane rubber, so that the influence of joule heating effect on the seal ring 32 is effectively prevented.

Referring to fig. 1, 4 and 5, as a specific embodiment of the guiding mechanism for the down-the-hole hammer of the present invention, the guiding joint 2 includes a connecting column 22 and a conical end 23 installed at one end of the connecting column 22, an inner thread section is provided on an inner wall of the second vent hole 21 located in the connecting column 22, and the inner thread section is used for being in threaded connection with the second connecting section 13; the connecting post 22 is adapted to the radial dimensions of the hole and the tapered end 23 is provided to allow the connecting post 22 to enter the hole more accurately and quickly. And an internal thread section is arranged on the second vent hole 21, the internal thread section is positioned inside the connecting column 22, and an external thread section is arranged on the second connecting section 13 of the transmission connecting shaft 1, so that the second connecting section 13 is in threaded connection with the internal thread section. The end face of the connecting column 22 remote from the conical end 23 is chamfered.

Referring to fig. 4, as a specific embodiment of the guiding mechanism for the down-the-hole hammer of the present invention, the conical end 23 and the connecting column 22 are in a step-like structure, one end of the connecting column 22 is provided with a plurality of protrusions 24 disposed around the conical end 23, and the protrusions 24 are used for crushing leaked slag; the radial dimension of spliced pole 22 is greater than the radial dimension of toper end 23, consequently processes a plurality of bellyings 24 on the terminal surface of spliced pole 22, when appearing falling the piece or leaking circumstances such as sediment in the hole, can be broken by bellyings 24 to falling the piece or leaking the sediment, prevents to fall the piece or leak the sediment and influence guiding mechanism's removal.

Referring to fig. 4, as a specific embodiment of the guiding mechanism for the down-the-hole hammer of the present invention, a connecting column 22 and a conical end 23 are integrally formed; the lug boss 24 is an alloy column and is arranged obliquely outwards; the integrally formed connecting post 22 and the tapered end 23 have high connecting strength, and thus can work stably and reliably. The bulge 24 is of a columnar structure made of alloy materials, has high hardness, and can efficiently and thoroughly break fallen blocks or leaked slag. The end face of the connecting column 22 is provided with a mounting hole, and the height of the alloy column is larger than the depth of the mounting hole, so that the alloy column is reliably mounted. And the outer side surface of the conical end 23 is provided with an external thread for connecting with an air source.

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

Claims

1. A guiding mechanism for a down-the-hole hammer is characterized by comprising a transmission connecting shaft and a guiding joint, wherein the transmission connecting shaft is used for being installed in the down-the-hole hammer, a first vent hole which penetrates through the transmission connecting shaft along the axial direction is formed in the transmission connecting shaft, a first connecting section which is used for being connected with a rear joint of the down-the-hole hammer is arranged on the outer side face of the upper end of the transmission connecting shaft, a second connecting section is arranged on the outer side face of the lower end of the transmission connecting shaft, and the lower end of the transmission connecting shaft extends out of the down-the-hole hammer; the transmission connecting shaft is also provided with an air outlet hole connected with the first air vent, and the air outlet hole is arranged close to the first connecting section; the transmission connecting shaft is also provided with a transmission part for transmission connection with the drill bit, and the transmission part is arranged close to the second connecting section; the drill bit is characterized in that an annular groove is formed in the outer side face of the transmission connecting shaft, the annular groove is located above the transmission portion and is used for communicating with an inclined hole in the end face of the drill bit, a through second vent hole is formed in the guide joint, the second connecting section is connected with the guide joint, the second vent hole is communicated with the first vent hole, and the guide joint is far away from one end of the transmission connecting shaft and is used for being connected with an air source.

2. The guiding mechanism for a down-the-hole impactor of claim 1 wherein said first vent hole comprises a straight section, a tapered section and a receiving section arranged in sequence from bottom to top, the aperture of said receiving section is larger than the aperture of said straight section, and said outlet hole is in communication with said receiving section; the accommodating hole section and the taper hole section are used for installing a check valve.

3. A guide mechanism for a down-the-hole impactor according to claim 2 wherein said outlet apertures are a plurality of apertures, evenly spaced around said first vent aperture.

4. The guiding mechanism for a down-the-hole hammer of claim 1, wherein the first connecting section and the second connecting section are both externally threaded, and the rear joint and the guiding joint are respectively provided with a threaded hole in threaded connection with the first connecting section and the second connecting section.

5. The guide mechanism for a down-the-hole hammer of claim 1, wherein the drive portion includes four mutually perpendicular drive surfaces, the four drive surfaces being disposed around the first vent; the drill bit is provided with square holes connected with the four transmission surfaces.

6. The guiding mechanism for a down-the-hole hammer of claim 1, wherein the outer side surface of the transmission connecting shaft is further provided with a sealing structure for sealing connection with the inner wall of the cylinder, and the sealing structure is positioned on the side of the air outlet hole away from the first connecting section.

7. A guide mechanism for a down-the-hole impactor according to claim 6 wherein said sealing means includes a plurality of sealing grooves and a sealing ring mounted in each of said sealing grooves.

8. The guiding mechanism for a down-the-hole hammer of claim 1, wherein the guiding joint comprises a connecting column and a tapered end mounted at one end of the connecting column, and an internal thread section is arranged on the inner wall of the second vent hole in the connecting column and is used for being in threaded connection with the second connecting section.

9. The guiding mechanism for a down-the-hole hammer of claim 8, wherein the tapered end is stepped with the connecting column, and one end of the connecting column is provided with a plurality of protrusions arranged around the tapered end, and the protrusions are used for crushing leaked slag.

10. The guide mechanism for a down-the-hole impactor of claim 9 wherein said attachment post and conical end are integrally formed; the bulge is an alloy column and is arranged obliquely outwards.