CN211115770U

CN211115770U - Impactor

Info

Publication number: CN211115770U
Application number: CN201922427646.9U
Authority: CN
Inventors: 杨日平; 朱自佳; 杨湘龙
Original assignee: Changsha Heijingang Industrial Co Ltd
Current assignee: Changsha Heijingang Industrial Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-07-28
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses an impactor, which comprises a spring, a gas distribution seat with a gas distribution seat inner cavity and a taper hole overflow valve with a first end inserted into the gas distribution seat inner cavity; the spring coaxially sleeved at the first end of the taper hole overflow valve is coaxially inserted into the inner cavity of the air distribution seat, and the periphery of the middle part of the taper hole overflow valve is provided with a stop part for positioning the spring. The impactor clamps the spring between the inner cavity of the gas distribution seat and the periphery of the taper hole overflow valve, and no matter whether the spring is compressed or not and how the compression amount is, any part of the spring is at least radially constrained by one of the inner cavity of the gas distribution seat and the periphery of the taper hole overflow valve, so that the phenomenon that the central shaft of the spring cannot align with the central shaft of the taper hole overflow valve or the gas distribution seat due to radial deviation in the working process of the impactor is avoided.

Description

Impactor

Technical Field

The utility model relates to a drilling engineering field especially relates to an impacter.

Background

The pneumatic down-the-hole hammer uses high-pressure air as a power source to drive a piston in the hammer to reciprocate at high speed and high frequency, so that the piston obtains enough energy to impact a drill bit to drill. The impact force acts on the drill bit in the form of stress waves, huge impact energy is generated within a very short time, rocks can be effectively crushed, holes can be formed quickly, and the purpose of drilling the rocks and the holes is achieved.

Referring to fig. 1, in a conventional pneumatic down-the-hole hammer, for example, a down-the-hole hammer, one end of a tapered hole overflow valve (hereinafter referred to as an original tapered hole overflow valve 03 for convenience of distinction) is inserted into an inner cavity of a gas distribution block (hereinafter referred to as an original gas distribution block 02) to move up and down along the inner cavity of the gas distribution block. A spring (hereinafter referred to as an original spring 01) is arranged between the original taper hole overflow valve 03 and the original gas distribution seat 02, and the original spring 01 is inserted into an inner cavity of the original taper hole overflow valve 03, that is, the inner cavity of the gas distribution seat, the end part of the original taper hole overflow valve 03 and the original spring 01 are sequentially sleeved from outside to inside.

In the up-and-down movement process of the original taper hole overflow valve 03, the original spring 01 has two states of compression and extension. When the original spring 01 is in an extending state, one end of the original spring is inserted into the inner cavity of the original taper hole overflow valve 03, and the other end of the original spring extends out of the end part of the original taper hole overflow valve 03. Because the original spring 01 extending out of the original taper hole overflow valve 03 loses radial constraint and cannot be positioned, the original spring 01 is easy to deflect and move in the radial direction, so that the original spring 01 and the side wall of the inner cavity of the gas distribution seat generate friction, and the original spring 01 fails.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an impacter can guarantee that the spring center pin aims at the center pin of impacter all the time, avoids the spring to damage the inefficacy.

To achieve the above object, the present invention provides an impactor, including:

the valve comprises a spring, an air distribution seat with an air distribution seat inner cavity and a taper hole overflow valve with a first end inserted into the air distribution seat inner cavity;

the spring coaxially sleeved at the first end of the taper hole overflow valve is coaxially inserted into the inner cavity of the air distribution seat, and the periphery of the middle part of the taper hole overflow valve is provided with a stop part for positioning the spring.

Preferably, the stopping part is arranged to be a curved surface or a plane surface surrounding the middle part of the taper hole overflow valve.

Preferably, the peripheral side of the first end of the taper hole overflow valve comprises a first cylindrical surface and a second cylindrical surface; the diameter of the first cylindrical surface is smaller than that of the second cylindrical surface, and the transition surface between the first cylindrical surface and the second cylindrical surface forms the stop part.

Preferably, the stop portion is provided as a planar ring structure facing the first end of the tapered bore overflow valve.

Preferably, a second end of the taper hole overflow valve is provided with a taper valve core and a third cylindrical surface which is coaxially connected between the taper valve core and the second cylindrical surface; the diameter of the third cylindrical surface is equal to the diameter of the second cylindrical surface.

Preferably, the stop part is provided as a positioning bump protruding outwards along the radial direction of the taper hole overflow valve.

Preferably, the positioning salient points are arranged in a plurality, and all the positioning salient points are arranged on the same cross section of the taper hole overflow valve.

Compared with the prior art, the utility model provides an impacter is including distributing gas seat, taper hole overflow valve and spring.

When the impactor is assembled, the first end of the taper hole overflow valve is inserted into an inner cavity of a gas distribution seat of the gas distribution seat, the spring is coaxially sleeved at the first end of the taper hole overflow valve and is coaxially inserted into the inner cavity of the gas distribution seat along with the taper hole overflow valve, a stop part is arranged on the periphery of the middle part of the taper hole overflow valve, and the end face of one end, close to the taper hole overflow valve, of the spring abuts against the stop part, so that the positioning of the spring relative to the taper hole overflow valve is realized.

In the impactor, the first end of the taper hole overflow valve, the spring and the inner cavity of the air distribution seat are sequentially sleeved from inside to outside, the taper hole overflow valve is coaxially sleeved for realizing the effect that the spring is coaxially sleeved, the taper hole overflow valve sleeved with the spring is coaxially inserted into the inner cavity of the air distribution seat, the inner diameter of the spring is matched with the outer diameter of the first end of the taper hole overflow valve, the spring sleeved with the taper hole overflow valve is ensured not to radially shake, and similarly, the outer diameter of the spring is matched with the inner diameter of the inner cavity of the air distribution seat, and the spring inserted into the inner cavity of the air distribution seat and the taper hole overflow valve are ensured not to radially shake.

To sum up, compare in prior art, set up the spring in the distribution seat inner chamber and the innermost of taper hole overflow valve inner chamber say, the utility model provides an impacter arranges the spring clamp in between distribution seat inner chamber and taper hole overflow valve periphery, no matter whether the spring compresses or the compression capacity is how, arbitrary position of spring receives the radial constraint of one of them of distribution seat inner chamber and taper hole overflow valve periphery at least, can not appear radial skew in the impacter course of operation and lead to the unable center pin of aiming at taper hole overflow valve or distribution seat of spring center pin, when the drill bit at the impacter reciprocates briefly, the spring center pin can not take place the skew.

Drawings

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

FIG. 1 is a schematic view of a prior art impactor;

fig. 2 is a schematic structural diagram of an impactor provided in an embodiment of the invention;

fig. 3 is a partial schematic view of fig. 2.

Wherein, 01-original spring, 02-original gas distribution seat, 03-original taper hole overflow valve, 1-spring, 2-gas distribution seat, 21-gas distribution seat inner cavity, 3-taper hole overflow valve, 31-stop part, 32-taper valve core.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an impactor in the prior art; fig. 2 is a schematic structural diagram of an impactor provided in an embodiment of the invention; fig. 3 is a partial schematic view of fig. 2.

The utility model provides an impactor, including spring 1, the distribution seat 2 that has distribution seat inner chamber 21 and the taper hole overflow valve 3 that first end is used for inserting in distribution seat inner chamber 21.

The middle peripheral side of the taper hole overflow valve 3 is provided with a stop part 31 for positioning the spring 1, when the impactor is assembled, the spring 1 is coaxially sleeved at the first end of the taper hole overflow valve 3, the end face of the spring 1 close to the taper hole overflow valve 3 abuts against the stop part 31, and the axial positioning of one end of the spring 1 on the taper hole overflow valve 3 is realized.

The taper hole overflow valve 3 sleeved with the spring 1 is coaxially inserted into the inner cavity 21 of the gas distribution seat, and the end part of the spring 1 far away from one end of the taper hole overflow valve 3 is pressed against the bottom surface of the inner cavity 21 of the gas distribution seat.

It should be noted that, the spring 1 coaxially sleeved on the tapered bore overflow stop valve 3 means that the inner diameter of the spring 1 matches the outer diameter of the tapered bore overflow stop valve 3, for example, the inner diameter of the spring 1 is equal to or slightly larger than the outer diameter of the tapered bore overflow stop valve 3, and the spring 1 sleeved on the tapered bore overflow stop valve 3 is radially constrained by the tapered bore overflow stop valve 3, and no offset is generated. The cone hole overflow valve 3 sleeved with the spring 1 is coaxially inserted into the inner cavity 21 of the gas distribution seat, which means that the outer diameter of the spring 1 is matched with the inner diameter of the inner cavity 21 of the gas distribution seat, for example, the outer diameter of the spring 1 is equal to or slightly smaller than the inner diameter of the inner cavity 21 of the gas distribution seat, and the spring 1 inserted into the inner cavity 21 of the gas distribution seat is radially constrained by the inner cavity 21 of the gas distribution seat, so that no deviation is generated.

The utility model provides an impacter with spring 1 setting between the periphery of taper hole overflow valve 3 and distribution seat inner chamber 21, when spring 1 does not receive external force extrusion, taper hole overflow valve 3 is located to 1 cover of partial spring, partial spring 1 extends to beyond taper hole overflow valve 3. The inside and outside of the spring 1 which is sleeved on the taper hole overflow valve 3 is restrained by the taper hole overflow valve 3 and the inner cavity 21 of the gas distribution seat, the outside of the spring 1 which extends to the outside of the taper hole overflow valve 3 is restrained by the inner cavity of the gas distribution seat, when the spring 1 is compressed, the length of the spring 1 which extends to the outside of the taper hole overflow valve 3 is reduced, the length of the spring 1 which is sleeved on the taper hole overflow valve 3 is increased, the whole spring 1 is always positioned between the clearance between the taper hole overflow valve 3 and the inner cavity 21 of the gas distribution seat, and radial deviation can not occur.

The length reduction of the spring 1 extending to the outside of the taper hole overflow valve 3 and the length increase of the spring 1 sleeved on the taper hole overflow valve 3 refer to the structural length of the spring 1, or the number of turns of the spring 1 along the axial direction, and do not refer to the length measured by the spring 1 in a compressed state.

The impactor provided by the present invention will be further described with reference to the accompanying drawings and embodiments.

In the impactor provided by the present application, the stop portion 31 is provided as a curved surface or a flat surface surrounding the middle of the tapered bore overflow valve 3.

The stop part 31 is arranged in the middle of the periphery of the taper hole overflow valve 3, when the spring 1 is sleeved on the taper hole overflow valve 3, one end face of the spring 1 is contacted with the stop part 31, no matter the spring 1 is compressed or the spring 1 is naturally relaxed, the end face of the spring 1 can not slide to the other end of the taper hole overflow valve 3 beyond the stop part 31 all the time, namely, the stop part 31 is used for limiting the axial position of the end face of the spring 1 relative to the spring 1.

The stopper 31 may be a flat surface to facilitate the end surface of the spring 1 to be in contact with the stopper 31, or may be a curved surface.

Further, the peripheral side of the first end of the taper hole overflow valve 3 comprises a first cylindrical surface and a second cylindrical surface; the diameter of the first cylindrical surface is smaller than the diameter of the second cylindrical surface, and the transition between the first cylindrical surface and the second cylindrical surface forms a stop 31.

The clearance between the first cylindrical surface and the inner cavity 21 of the air distribution seat is equal to or slightly larger than the difference between the inner diameter and the outer diameter of the spring 1, the radial dimension of the second cylindrical surface is equal to or slightly smaller than the radial dimension of the inner cavity of the air distribution seat, the spring 1 is sleeved on the first cylindrical surface, and the end surface of the spring 1 is pressed against the transition surface between the first cylindrical surface and the second cylindrical surface, namely the stop part 31. Obviously, the valve seat cavity 21 is also configured as a cylindrical cavity to slidably fit the tapered bore spill stop valve 3 that is fitted with the spring 1.

On the basis of the above, the stopping portion 31 is specifically configured as a planar circular ring structure facing the first end of the tapered hole overflow valve 3, and the end surface of the spring 1 sleeved on the tapered hole overflow valve 3 is attached to the stopping portion 31 of the planar circular ring structure.

In order to facilitate the up-and-down sliding of the tapered hole overflow valve 3 in the inner cavity 21 of the air distribution seat, a tapered valve core 32 and a third cylindrical surface coaxially connected between the tapered valve core 32 and the second cylindrical surface are arranged at the second end of the tapered hole overflow valve 3; the diameter of third face of cylinder equals the diameter of second face of cylinder, that is to say, the utility model provides a taper hole overflow valve 3 of impacter includes taper case 32 and the second grade round platform of being connected with taper case 32.

Of course, in addition to providing the stopper 31 as an annular flat surface or a curved surface, the stopper 31 may also be provided as a positioning bump protruding outward in the radial direction of the tapered bore overflow valve 3. The distance between the positioning salient point and the central shaft of the taper hole overflow valve 3 is larger than the radius of the spring 1, and the end face of the spring 1 is restrained by the positioning salient point and cannot slide relative to the valve rod part of the taper hole overflow valve 3.

The plurality of positioning convex points are arranged, and all the positioning convex points are arranged on the same cross section of the taper hole overflow valve 3, which can be regarded as a discontinuous stop part 31.

The impacter provided by the utility model is described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. An impactor, comprising: the valve comprises a spring (1), a gas distribution seat (2) with a gas distribution seat inner cavity (21) and a taper hole overflow valve (3) with a first end inserted into the gas distribution seat inner cavity (21);

the spring (1) coaxially sleeved at the first end of the taper hole overflow valve (3) is coaxially inserted into the inner cavity (21) of the gas distribution seat, and a stop part (31) for positioning the spring (1) is arranged on the periphery of the middle part of the taper hole overflow valve (3).

2. The impactor as defined in claim 1, wherein the stop portion (31) is provided as a curved surface or a flat surface surrounding a middle portion of the cone overflow valve (3).

3. The impactor as defined in claim 2, wherein the circumference of the first end of the tapered bore overflow valve (3) comprises a first cylindrical surface and a second cylindrical surface; the diameter of the first cylindrical surface is smaller than the diameter of the second cylindrical surface, and the transition surface between the first cylindrical surface and the second cylindrical surface forms the stop portion (31).

4. An impactor according to claim 3, characterised in that said stop portion (31) is provided in particular as a planar annular structure towards the first end of the cone overflow valve (3).

5. The impactor according to claim 3 or 4, wherein the second end of the tapered bore overflow valve (3) is provided with a tapered valve core (32) and a third cylindrical surface coaxially connected between the tapered valve core (32) and the second cylindrical surface; the diameter of the third cylindrical surface is equal to the diameter of the second cylindrical surface.

6. The impactor as defined in claim 1, wherein the stop portion (31) is provided as a positioning projection projecting radially outwards of the cone overflow valve (3).

7. The impactor as defined in claim 5, wherein a plurality of positioning protrusions are provided, and all the positioning protrusions are provided on the same cross section of the tapered bore overflow valve (3).