CN207177725U - A kind of down-the-hole air hammer - Google Patents
A kind of down-the-hole air hammer Download PDFInfo
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- CN207177725U CN207177725U CN201721302077.XU CN201721302077U CN207177725U CN 207177725 U CN207177725 U CN 207177725U CN 201721302077 U CN201721302077 U CN 201721302077U CN 207177725 U CN207177725 U CN 207177725U
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Abstract
A kind of down-the-hole air hammer disclosed in the present application, including, piston, outer shell and gas distribution channels, the piston is movably arranged on the outer cylinder interior, the piston moves back and forth in the outer shell makes the gas distribution channels can alternate communication ante-chamber and back cavity, the internal piston is provided with axial passage, the outer inside wall of cylinder is provided with groove, the piston, which is provided with, blows cinder hole, the cinder hole that blows connects the axial passage, during the reciprocating motion of the pistons, it is described blow cinder hole and can be interrupted form gas channel between the groove of the outer inside wall of cylinder.The down-the-hole air hammer, cinder hole will be blown and be arranged on piston, without being always maintained at blowing slag, but only a certain stage during piston movement blow slag, operating pressure reduces smaller, and air compressor machine air consumption is small, the oil consumption of air compressor machine is greatlyd save, and is advantageous to improve rate of penetration.
Description
Technical field
The utility model belongs to down-the-hole drilling tool technical field, and in particular to a kind of down-the-hole air hammer.
Background technology
Down-the-hole air hammer is used primarily in the drilling operations such as mine blasting, well perforate, and the pressure of high pressure is provided by air compressor machine
Contracting air enters impactor ante-chamber and back cavity does work, and piston is produced the reciprocating motion of high speed, final logical to hit drill bit afterbody
The carbide button crossed above drill bit realizes broken rock, and produced rock slag blows out bottom hole by the gases at high pressure of impactor discharge again, final real
Ready-made hole.
Down-the-hole air hammer is in operation process, the problem of often encountering return slag, that is, the rock slag of the production that drills is along impactor
The passage of gases at high pressure is discharged, into the internal cavity of impactor, rock slag can cause seizure of piston and can not work, and at this moment need
It can be just continuing with after taking impactor apart cleaning, this has had a strong impact on the job scheduling and construction cost of down-the-hole drill.It is existing
Down-the-hole air hammer, in whole work process, pressure-air can be always maintained at from blow cinder hole discharge impactor outside carry out blowing slag,
Air compressor machine air consumption is big, and operating pressure reduces, and causes air compressor machine oil consumption high, and rate of penetration is slow.
Utility model content
In view of the above-mentioned problems of the prior art, the purpose of this utility model is to provide a kind of down-the-hole air hammer, only
The a certain stage during piston movement blows slag, and interruption carries out blowing slag, and operating pressure reduces smaller, air compressor machine air consumption
It is small, the oil consumption of air compressor machine is greatlyd save, and be advantageous to improve rate of penetration.
The technical scheme that the utility model is provided is as follows：
A kind of down-the-hole air hammer, including piston, outer shell and gas distribution channels, the piston are movably arranged in the outer shell
Portion, the piston moved back and forth in the outer shell make the gas distribution channels can alternate communication ante-chamber and back cavity, in the piston
Portion is provided with axial passage, and the outer inside wall of cylinder is provided with groove, and the piston, which is provided with, blows cinder hole, described to blow described in cinder hole connection
Axial passage, during the reciprocating motion of the pistons, the cinder hole that blows can be interrupted the shape between the groove of the outer inside wall of cylinder
Into gas channel.
Further, the piston includes piston leading portion, piston stage casing and piston endpiece, and the cinder hole that blows is located at the work
Endpiece is filled in, when the piston moves backward, the cinder hole that blows can form gas channel between the groove of the outer inside wall of cylinder.
Further, the cinder hole that blows is inclined on the piston, makes described to blow the air stream outlet of cinder hole in air-flow
The front of entrance.
Further, at least provided with cinder hole is blown described in two, the cinder hole that blows is distributed along the piston even circumferential.
Further, the second groove and the 3rd groove, institute are axially provided with along the piston on the piston endpiece outer wall
The second groove to be stated to connect with the 3rd groove, the width of second groove is more than the width of the 3rd groove, and described the
The length of three grooves is more than the length of second groove, it is described blow cinder hole located at second groove and the 3rd groove it
Between the piston on.
Further, second groove is annular groove, and the 3rd groove is distributed along the piston even circumferential.
Down-the-hole air hammer provided by the utility model, during piston movement, blowing the air flow inlet of cinder hole can be interrupted
Gas channel is formed with the groove on the outer inside wall of cylinder, now, gap of the pressure-air between air flow inlet and groove, which enters, blows
Cinder hole, and the axial passage for entering internal piston carries out blowing slag, prevents rock slag from entering from drill bit inside impactor, and will can enter
Rock slag inside impactor is blown out from drill bit.The down-the-hole air hammer, only a certain stage during piston movement carry out blowing slag,
Other motion stages, blow that the air flow inlet of cinder hole is relative with the outer inside wall of cylinder, so that blowing the air flow inlet closing of cinder hole, now not
Carry out blowing slag.The cinder hole that blows of down-the-hole air hammer carries out interruption and blows slag, and operating pressure reduces smaller, and air compressor machine air consumption is small, significantly
The oil consumption of air compressor machine has been saved, and has been advantageous to improve rate of penetration.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation for the down-the-hole air hammer that embodiment of the present utility model provides；
Fig. 2 is structural representation of the down-the-hole air hammer of embodiment of the present utility model offer when piston moves backward；
Fig. 3 is the enlarged drawing at A in Fig. 2.
Description of reference numerals：Piston 1；Second groove 101；3rd groove 102；Outer shell 2；Groove 201；Ante-chamber 3；Back cavity 4；
Axial passage 5；Blow cinder hole 6；Drill bit 7；Rear joint 8；Non-return valve 9；Distribution seat 10；Inner casing 11.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the application, it is real below in conjunction with the application
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described implementation
Example only some embodiments of the present application, rather than whole embodiments.It is common based on the embodiment in the application, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, it should all belong to the application protection
Scope.
Firstly the need of explanation, in present specification, using one end where drill bit on down-the-hole air hammer 7 for it is " preceding " just,
Conversely, using one end away from drill bit 7 on down-the-hole air hammer as " rear " side." length " described herein refers to impacting along down-the-hole
The distance of device axial direction, " width " refer to the distance along part circumferencial direction where it.
As shown in Figure 1 to Figure 3, a kind of down-the-hole air hammer that the present embodiment provides, including piston 1, outer shell 2 and distribution are led to
Road, the piston 1 are movably arranged on inside the outer shell 2, and the piston 1 moves back and forth in the outer shell 2 makes the distribution
Passage can alternate communication ante-chamber 3 and back cavity 4, the inside of the piston 1 is provided with axial passage 5, and the inwall of outer shell 2 is provided with groove
201, the piston 1, which is provided with, blows cinder hole 6, and the cinder hole 6 that blows connects the axial passage 5, moved back and forth in the piston 1
Cheng Zhong, it is described blow cinder hole 6 and can be interrupted form gas channel between the groove 201 of the inwall of the outer shell 2.
Gases at high pressure enter from the middle through-hole of rear joint 8, and the air-flow entered by non-return valve 9 inside down-the-hole air hammer leads to
Road, non-return valve 9 are located at the one end of distribution seat 10 in rear joint 8, and non-return valve 9 is used for logical inside one-way sealing rear joint 8
Hole, distribution seat 10 seals the internal cavity for being fixed on inner casing 11, between inner casing 11 and outer shell 2, and between piston 1 and outer shell 2,
Gas distribution channels are respectively constituted, gases at high pressure promote 1 reciprocal priming of piston, and the reciprocating motion in outer shell 2 of piston 1 leads to distribution
Road can alternate communication ante-chamber 3 and back cavity 4.
When down-the-hole air hammer carries out boring work, there is very big pressure in the hole of institute's Drilling.When down-the-hole air hammer
When piston 1 travels forward, the gases at high pressure inside back cavity 4 are discharged through the internal axial channel 5 of piston 1 with the inner passage of drill bit 7, this
During, rock slag will not enter in down-the-hole air hammer；But work as the piston 1 of down-the-hole air hammer during moving backward, due to
Pressure-air is not discharged out of down-the-hole air hammer, and the air pressure of the internal cavity of drill bit 7 is less than the air pressure in drilling, and rock slag can be from drill bit
7 inner passages enter in impactor, i.e., return slag occur in down-the-hole air hammer cavity.Return slag can cause piston 1 stuck.
To solve this problem, existing means are to increase one on non-return valve 9 to blow cinder hole 6, no matter piston 1 is gone back forward
It is to move backward, pressure-air enters the internal axial channel 5 of piston 1 by blowing cinder hole 6, and keeps always inside drill bit 7
Passage is discharged, so as to which the rock slag entered in down-the-hole air hammer be blown out.It is reciprocal in piston 1 but the defects of taking this means is
During the entire process of motion, pressure-air is discharged outside down-the-hole air hammer all the time by cinder hole 6 is blown, and air compressor machine air consumption is big, oil consumption
Height, and operating pressure can be reduced, cause rate of penetration slower.
The down-the-hole air hammer that the present embodiment provides, during piston 1 moves, blowing the air flow inlet of cinder hole 6 can be interrupted
Gas channel, now, gap of the pressure-air between air flow inlet and groove 201 are formed with the groove 201 on the inwall of outer shell 2
Into blowing cinder hole 6, and the axial passage 5 entered inside piston 1 carries out blowing slag, prevents rock slag inside the entrance impactor of drill bit 7,
And the rock slag entered inside impactor can be blown out from drill bit 7.The down-the-hole air hammer, it is only a certain in the motion process of piston 1
Stage carries out blowing slag, other motion stages, and it is relative with the inwall of outer shell 2 to blow the air flow inlet of cinder hole 6, so that blowing the gas of cinder hole 6
Inflow entrance is closed, now without blowing slag.The cinder hole 6 that blows of down-the-hole air hammer carries out interruption and blows slag, operating pressure reduce it is smaller, it is empty
Press air consumption is small, greatlys save the oil consumption of air compressor machine, and is advantageous to improve rate of penetration.
Specifically, the piston 1 includes piston leading portion, piston stage casing and piston endpiece, the cinder hole 6 that blows is located at the work
Endpiece is filled in, when the piston 1 moves backward, the cinder hole 6 that blows can form gas between the groove 201 of the inwall of outer shell 2
Circulation road.Because return slag occurs mainly in piston 1 during moving backward inside down-the-hole air hammer, therefore, only in piston 1
During moving backward, formation gas channel carries out blowing slag between blowing the groove 201 of cinder hole 6 and the inwall of outer shell 2, and blowing slag has
Specific aim, the slag that blows that can reach good are imitated, and operating pressure will not be caused to reduce again larger, are advantageous to improve rate of penetration, and
And the oil consumption of air compressor machine is saved.
Preferably, the cinder hole 6 that blows is inclined on the piston 1, makes described to blow the air stream outlet of cinder hole 6 in air-flow
The front of entrance.Blow cinder hole 6 to be obliquely installed, be easy to gases at high pressure to be moved after entering the axial passage 5 of piston 1 to the direction of drill bit 7, blow
Slag effect is more preferable.
The further optimisation technique scheme of the present embodiment, at least provided with blowing cinder hole 6 described in two, the cinder hole 6 that blows is along described
The even circumferential of piston 1 is distributed.The quantity for blowing cinder hole 6 determines according to specifically used effect, sets and multiple blows cinder hole 6 and along piston
1 even circumferential is arranged, so that it is more preferable to blow slag effect.
Specifically, there are the second groove 101 and the 3rd groove along the piston 1 is axially arranged on the piston endpiece outer wall
102, second groove 101 connects with the 3rd groove 102, and the width of second groove 101 is recessed more than the described 3rd
The width of groove 102, the length of the 3rd groove 102 are more than the length of second groove 101, and the cinder hole 6 that blows is located at institute
State on the piston 1 between the second groove 101 and the 3rd groove 102.
In the present embodiment, the 3rd groove 102 is preferably adjacent with the stage casing of piston 1, blow cinder hole 6 located at the second groove 101 with
On piston 1 between 3rd groove 102.During piston 1 travels forward, gas distribution channels connection ante-chamber 3, but due to the 3rd groove 102
Length be more than the length of the second groove 101, it is relative with the inwall of outer shell 2 to blow cinder hole 6, by it is closed firmly, without blowing slag；Ante-chamber 3
After accumulating substantial amounts of gases at high pressure, piston 1 is promoted to move backward, ante-chamber 3 is closed, and gas distribution channels connect with back cavity 4, and blows slag
The aperture of hole 6 and the inwall upper groove 201 of outer shell 2 form gas channel, and gases at high pressure are from groove 201 and blow between the aperture of cinder hole 6
Gap, which enters, blows cinder hole 6, into the internal axial channel 5 of piston 1, carries out blowing slag.
Wherein, second groove 101 is annular groove, and the 3rd groove 102 is distributed along the even circumferential of piston 1.
In the present embodiment, the depth of the 3rd groove 102 is more than the depth of the second groove 101, and the 3rd groove 102 is equal along the circumference of piston 1
Even distribution, cinder hole 6 is blown on the piston 1 in the place circumference range of the 3rd groove 102.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (6)
- A kind of 1. down-the-hole air hammer, it is characterised in that including piston (1), outer shell (2) and gas distribution channels, piston (1) activity Internal installed in the outer shell (2), the piston (1) moves back and forth in the outer shell (2) makes the gas distribution channels to replace Ante-chamber (3) and back cavity (4) are connected, is provided with axial passage (5) inside the piston (1), outer shell (2) inwall is provided with groove (201), the piston (1), which is provided with, blows cinder hole (6), and the cinder hole (6) that blows connects the axial passage (5), in the piston (1) in reciprocatory movement, it is described blow cinder hole (6) and can be interrupted form air-flow between the groove (201) of the outer shell (2) inwall Passage.
- 2. down-the-hole air hammer according to claim 1, it is characterised in that the piston (1) is included in piston leading portion, piston Section and piston endpiece, the cinder hole (6) that blows is located at the piston endpiece, described to blow cinder hole when the piston (1) moves backward (6) gas channel can be formed between the groove (201) of the outer shell (2) inwall.
- 3. down-the-hole air hammer according to claim 1, it is characterised in that the cinder hole (6) that blows is inclined at the work Fill on (1), make described to blow the air stream outlet of cinder hole (6) in the front of air flow inlet.
- 4. down-the-hole air hammer according to claim 1, it is characterised in that described at least provided with blowing cinder hole (6) described in two Cinder hole (6) is blown to be distributed along the piston (1) even circumferential.
- 5. down-the-hole air hammer according to claim 1, it is characterised in that along the piston on the piston endpiece outer wall (1) it is axially arranged to have the second groove (101) and the 3rd groove (102), second groove (101) and the 3rd groove (102) connect, the width of second groove (101) is more than the width of the 3rd groove (102), the 3rd groove (102) length is more than the length of second groove (101), and the cinder hole (6) that blows is located at second groove (101) and institute State on the piston (1) between the 3rd groove (102).
- 6. down-the-hole air hammer according to claim 5, it is characterised in that second groove (101) is annular groove, described 3rd groove (102) is distributed along the piston (1) even circumferential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721302077.XU CN207177725U (en) | 2017-09-30 | 2017-09-30 | A kind of down-the-hole air hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721302077.XU CN207177725U (en) | 2017-09-30 | 2017-09-30 | A kind of down-the-hole air hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207177725U true CN207177725U (en) | 2018-04-03 |
Family
ID=61749767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721302077.XU Active CN207177725U (en) | 2017-09-30 | 2017-09-30 | A kind of down-the-hole air hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207177725U (en) |
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2017
- 2017-09-30 CN CN201721302077.XU patent/CN207177725U/en active Active
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