CN204060508U - A kind of down-the-hole air hammer - Google Patents
A kind of down-the-hole air hammer Download PDFInfo
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- CN204060508U CN204060508U CN201420540095.1U CN201420540095U CN204060508U CN 204060508 U CN204060508 U CN 204060508U CN 201420540095 U CN201420540095 U CN 201420540095U CN 204060508 U CN204060508 U CN 204060508U
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Abstract
A kind of down-the-hole air hammer, comprise impactor main body, joint after impactor back body is provided with, front portion is provided with front connector, hollow duct is offered in rear joint, drill bit is connected with front connector, bit central hole is offered in drill bit, bit central hole is communicated with the end face inclined hole of drill bit, exit, hollow hole road in impactor main body is provided with non retern valve, distribution bar in impactor main body and non retern valve valve seat are integral type structure, and except introducing except cylinder body by compressed air, also same cylinder body, piston realize the distribution action of piston movement together; Piston is arranged in inner casing, moves in inner casing and outer tube; Led by fairlead in piston front portion, piston nose matches with drill bit, and the centre porosity in piston communicates with bit central hole.This device have employed the piston structure of innovation, and distribution bar, inner casing, rear joint trim designs close, and the snap ring of innovation and front connector assembly structure, make whole impactor rational in infrastructure, operating efficiency is high, also reduces cost of production simultaneously.
Description
Technical field
The utility model belongs to impactor manufacturing technology field, is specifically related to a kind of down-the-hole air hammer of new structure.
Background technology
Valveless down-the-hole air hammer is a kind of typical pneumatic impact equipment, and it is the drilling tool of down-the-hole drill, is that rig is real
Execute the operating mechanism of boring.This equipment is mainly used in Drilling diameter 65-305mm, hole depth 60m driling explosion hole.The drilling efficiency of down-the-hole drill depends on the performance of impactor to a great extent.At present, down-the-hole air hammer market used is a kind of DHD series valveless double-cylinder structure down-the-hole air hammer being representative with Ingersoll-rand company of state.Its feature is large end drill hammer when being piston movement, and piston small end and inner casing interact and carry out distribution and guiding.This valveless down-the-hole air hammer has following drawbacks:
1, between sick valve seat and rear joint, rubber ring is housed, when impactor works, self just can absorb certain energy, the aging distortion of more outstanding is rubber after impactor work a period of time, will produce and jump and quality of fit between each parts of serious impact, thus reduce operating efficiency, and shorten the working life of impactor.
2, inner casing is the part processed complex of thin wall construction, and cost of manufacture is high; Be consumable accessory so be one of key point affecting impactor application life and stability because of it.
3, outer sleeve inner wall has dug multiple cannelure, decreases the abrasion resistance of outer tube.
4, there is more intake and exhaust road, thus cause larger atmospheric pressure lost.
5, piston has more distribution duct, air flue is transferred and distance is long, and pressure loss is large, and make it responsive to heat treatment reaction, stress is concentrated, and works often because of technique and structural reason early damage.
Summary of the invention
In order to overcome the shortcoming that existing impactor exists, the utility model provides a kind of failure rate is low, in air pressure 5-30 kilograms per centimeter
2scope in efficient, stable, low energy consumption, the down-the-hole air hammer that runs reliably.
The purpose of this utility model is achieved in that a kind of down-the-hole air hammer, comprise impactor main body, joint after impactor back body is provided with, front portion is provided with front connector, hollow duct is offered in rear joint, drill bit is connected with front connector, bit central hole is offered in drill bit, bit central hole is communicated with the end face inclined hole of drill bit, exit, hollow hole road in impactor main body is provided with non retern valve, distribution bar in impactor main body and non retern valve valve seat are integral type structure, except compressed air is introduced except cylinder body, also same cylinder body, piston realizes the distribution action of piston movement together, piston is arranged in inner casing, moves in inner casing and outer tube, is provided with inner casing annular air cavity in inner casing, led by fairlead in piston front portion, piston nose matches with drill bit, and the centre porosity in piston communicates with bit central hole, be provided with multiple air drain excessively in the middle part of piston, cross between air drain relative two and be provided with an annular air cavity.
Multiple air drains excessively that described piston is provided with are microscler through air drain excessively.
Be provided with nose end slot between rear joint stub end and non retern valve, before air drain and cylinder are crossed in the circular passage that nose end slot, distribution bar wing passage, inner casing outer wall and outer sleeve inner wall are formed, two-piston, air chamber and rear gas chamber form the gas channel of impactor.
The back-up ring location be arranged on outer sleeve inner wall is crossed in fairlead conducting.
The maximum outside diameter of piston and the ratio of overall length are less than 3.5.
Snap ring is staged snap ring, and its inside is provided with interior step, and outside is provided with outer step, and the small end cylindrical of snap ring matches with annular chamber in front connector and locates, and big end surface and fairlead end face are fitted.
Distribution bar position of matching with piston hole is provided with multiple damping slot.
The down-the-hole air hammer that the utility model provides, has following beneficial effect:
1, the piston structure of innovation;
The design that the ratio of piston maximum outside diameter and overall length is less than 3.5, is more conducive to the quick transmission of alternating stresses ripple, makes impactor have higher power output through practical proof this kind of design piston.
2, distribution bar, inner casing, rear joint trim designs are reasonable:
On the one hand, inner casing cylindrical is provided with orientational cone-shaped surface and matches with outer tube, being provided with support level in the middle part of distribution bar is contained in the stepped hole of inner casing one end, another side, rear joint large end face along with the precession of screw thread is directly press-fitted, the large end face of gas bar impels three parts to form to be rigidly connected, thus jumping when avoiding the work of distribution bar, but the high-precision cooperation of maintenance that can be permanent, ensure that operating efficiency.
Distribution bar and check valve seat are integrated, and structure is simple, the function that can realize location, vibration damping, air inlet.Reliable and stable during work.Distribution bar and piston hole matching part are provided with multiple damping slot (see A portion), effectively can reduce the leakage of gases at high pressure.
3, innovation snap ring and front connector assembly structure, snap ring adopts stepped design (see figure 2), small end cylindrical matches with annular chamber in front connector and locates in (see C portion), big end surface and fairlead end face are fitted, impactor is loaded and unloaded more convenient, snap ring part is sunk to front connector formula and designs relative traditional design structure more compact and reasonable by this kind, snap ring sinks to the design of front connector formula and down-the-hold drill bit overall length and quality has been had farthest reduce, result in the impact piston structure matched and produce great innovation namely: from " elongated " type piston to the transformation of " short and thick " type piston, a complete set of equipment is made to have high-output power, also reduce product cost simultaneously.
4, participate in distribution action failure rate without tail pipe low: this impactor adapted anury pipe bit, impactor adopts fairlead fitting piston to complete distribution, participates in, failure rate is low in the course of work without drill bit tail pipe.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is Snap ring structure schematic diagram of the present utility model.
Fig. 3 is the enlarged drawing at A place in Fig. 1.
Fig. 4 is the enlarged drawing at B place in Fig. 1.
Fig. 5 is the enlarged drawing at C place in Fig. 1.
Fig. 6 is a kind of structural representation of the utility model piston.
Fig. 7 is the another kind of structural representation of the utility model piston.
Fig. 8 is the structural representation of the utility model inner casing.
Detailed description of the invention
Structure of the present utility model is as shown in the figure: a kind of down-the-hole air hammer, comprise impactor main body, joint 1 after impactor back body is provided with, front portion is provided with front connector 12, hollow duct 14 is offered in rear joint 1, drill bit 13 is connected with front connector 12, bit central hole 22 is offered in drill bit 13, bit central hole 22 is communicated with the end face inclined hole 23 of drill bit, exit, hollow duct 14 in impactor main body is provided with non retern valve 2, distribution bar 5 in impactor main body and non retern valve valve seat are integral type structure, except compressed air is introduced except cylinder body, also same cylinder body, piston realizes the distribution action of piston movement together, piston 7 is arranged in inner casing 6, moves, be provided with inner casing annular air cavity i, inner casing 6 offer air vent 32 and tilted air holes 33 in inner casing 6 in inner casing 6 and outer tube 8, being led by fairlead 10 in piston 7 front portion, matches with drill bit 13 in piston 7 front end, and the centre porosity 24 in piston 7 communicates with bit central hole 22.
Be provided with multiple air drain excessively in the middle part of piston 7 of the present utility model, cross air drain 18 relative two, be provided with an annular air cavity 27 between 19, as shown in Figure 6.
Be provided with multiple air drain excessively in the middle part of piston 7 of the present utility model and also can adopt microscler through air drain 30 excessively, as shown in Figure 7.
In the utility model, non retern valve 2 is the one way valves preventing magmatic water from flowing into impactor and drilling rod.
In the utility model, piston 7 is for having the column structure piston in duct, and its external surface was provided with air drain; Nose end slot 15 is provided with between rear joint 1 stub end and non retern valve 2, air drain 18 is crossed in the circular passage 17 that nose end slot 15, distribution bar wing passage 16, inner casing 6 outer wall and outer tube 8 inwall are formed, two-piston, 19 and cylinder before air chamber 20 and rear gas chamber 21 form the gas channel of impactor.The maximum outside diameter of piston 7 and the ratio of overall length are less than 3.5; Piston 7 is directly a part of mechanical movement kinetic energy by the power conversion of Compressed Gas, and by it, this kinetic energy is passed to drill bit 13 by the mode of collision, and piston 7 is move in inner casing 6 and outer tube 8 all the time.
In the utility model, fairlead 10 conducting is crossed the back-up ring 9 be arranged on outer tube 8 inwall and is located.
Snap ring 11 of the present utility model is for splitting staged snap ring, its effect prevents drill bit 13 from coming off, snap ring 11 structure as shown in Figure 2, its inside is provided with interior step 3, outside is provided with outer step 29, the small end cylindrical of snap ring matches with annular chamber in front connector and locates, and big end surface and fairlead 10 end face are fitted.When snap ring 11 assembles, drill bit 13 makes drill bit spline and front connector spline fitted by small end through front connector.Snap ring 11 is split-type structural, be put together by two symmetrical half snap rings in vertical center axis face that hand down, during device, two and half snap rings (whole snap ring is once put to enter) are inserted in front connector end face stepped hole one by one, make it small end cylindrical to match with front connector stepped hole and locate in (see C portion), snap ring big end surface compresses along with the precession of screw thread and fairlead end face are fitted.When impactor be shadoof blow scoriform state time, drill bit moves down its small end step and matches with step in snap ring.
Distribution bar 5 of the present utility model position of matching with piston hole is provided with multiple damping slot 26, damping slot is the two or more annular arc groove that distribution bar small end is provided with, high pressure draught can form local circulation through herein time, thus gases at high pressure can be hindered to pass through from fit clearance.
Operating principle of the present utility model is as follows: the gases at high pressure P introduced by rear joint hollow duct 14, back down non retern valve 2, through after the annular chamber 17 that formed of joint macropore end gap seam 15, distribution bar wing passage 16, inner casing 6 outer wall and outer tube 8 inwall cross air drain 18,19(to piston or cross air drain 30 through straight), gases at high pressure enter cylinder before air chamber 20 and rear gas chamber 21 by what replace here.
When return starts, piston is in position shown in Fig. 2, the gases at high pressure in annular chamber 17 through piston cross air drain 18,19, enter front air chamber 20 through piston body surface and promote piston 7 and move.In the motion of piston 7 return, when piston cross air drain 19 close time, front air chamber 20 air inlet stops, and the high pressure gas expansion in the forward air chamber of piston 7 continues to move upward, after piston impact end and fairlead are thrown off, front air chamber 20 gas through bit central hole 22, end face inclined hole 23 drains at the bottom of hole.When piston starts return motion, the gas P of rear gas chamber 21, escapes at the bottom of hole through piston centre pore 24, bit central hole 22, drill bit inclined hole 23, and back pressure resistance suffered when making piston movement is very little; When distribution bar 5 microcephaly starts to enter the cooperation of piston formation, the return motion of piston 7 makes the gas of rear gas chamber 21 be compressed; When the large end motion of piston 7 is to forming opening with the interior inside wall of cylinder, gases at high pressure are crossed air drain 19 enter rear gas chamber 21 through annular chamber 17, pistons.Due to piston movement inertia, piston slides a segment distance, makes piston stop return motion until the gases at high pressure entering rear gas chamber 21 produce pressure.
During piston stroke motion, piston moves to the opening turn-off transient that in the large end of piston and inner casing, annular chamber 25 is formed under the promotion of gases at high pressure, the passage that gases at high pressure enter rear gas chamber 21 is blocked, piston travels forward by gas expansion, after piston center hole and distribution bar lower end depart from, rear gas chamber's gas drains at the bottom of hole through plug centre porosity 24, bit central hole 22 and drill bit inclined hole 23.Now piston 7 clashes into drill bit afterbody and completes stroke movement.When piston starts stroke movement, the gas of front air chamber 20 continues to be discharged at the bottom of hole through fairlead and bit central hole 22, drill bit inclined hole 23; When piston and fairlead formed coordinate time, the gas of front air chamber starts compression, and piston moves to always to be connected piston and cross air drain 19, and gases at high pressure enter into front air chamber 20, complete distribution process.
Claims (7)
1. a down-the-hole air hammer, comprise impactor main body, joint (1) after impactor back body is provided with, front portion is provided with front connector (12), hollow duct (14) is offered in rear joint (1), drill bit (13) is connected with front connector (12), it is characterized in that: in drill bit (13), offer bit central hole (22), bit central hole (22) is communicated with the end face inclined hole (23) of drill bit, hollow duct (14) exit in impactor main body is provided with non retern valve (2), distribution bar (5) in impactor main body and non retern valve valve seat are integral type structure, except compressed air is introduced except cylinder body, also same cylinder body, piston realizes the distribution action of piston movement together, piston (7) is arranged in inner casing (6), moves, be provided with inner casing annular air cavity (31) in inner casing (6) in inner casing (6) and outer tube (8), piston (7) front portion is by fairlead (10) guiding, match with drill bit (13) in piston (7) front end, centre porosity (24) in piston (7) communicates with bit central hole (22), piston (7) middle part is provided with multiple air drain excessively, cross between air drain (18,19) relative two and be provided with an annular air cavity (27).
2. a kind of down-the-hole air hammer according to claim 1, is characterized in that: multiple air drains excessively that piston (7) is provided with are microscler through air drain excessively.
3. a kind of down-the-hole air hammer according to claim 1, it is characterized in that: between rear joint (1) stub end and non retern valve (2), be provided with nose end slot (15), before air drain (18,19), annular air cavity (27) and cylinder are crossed in the circular passage (17) that nose end slot (15), distribution bar wing passage (16), inner casing (6) outer wall and outer tube (8) inwall are formed, two-piston, air chamber (20) and rear gas chamber (21) form the gas channel of impactor.
4. a kind of down-the-hole air hammer according to claim 1, is characterized in that: back-up ring (9) location be arranged on outer tube (8) inwall is crossed in fairlead (10) conducting.
5. a kind of down-the-hole air hammer according to claim 1, is characterized in that: the maximum outside diameter of piston (7) and the ratio of overall length are less than 3.5.
6. a kind of down-the-hole air hammer according to claim 1, it is characterized in that: snap ring (11) is staged snap ring, its inside is provided with interior step (3), outside is provided with outer step (29), the small end cylindrical of snap ring matches with annular chamber in front connector and locates, and big end surface and fairlead (10) end face are fitted.
7. a kind of down-the-hole air hammer according to claim 1, is characterized in that: distribution bar (5) position of matching with piston hole is provided with multiple damping slot (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420540095.1U CN204060508U (en) | 2014-09-19 | 2014-09-19 | A kind of down-the-hole air hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420540095.1U CN204060508U (en) | 2014-09-19 | 2014-09-19 | A kind of down-the-hole air hammer |
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| Publication Number | Publication Date |
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| CN204060508U true CN204060508U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420540095.1U Active CN204060508U (en) | 2014-09-19 | 2014-09-19 | A kind of down-the-hole air hammer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265159A (en) * | 2014-09-19 | 2015-01-07 | 宜昌市五环钻机具有限责任公司 | Down hole hammer |
| CN108756730A (en) * | 2018-07-03 | 2018-11-06 | 苏州新锐合金工具股份有限公司 | A kind of down-the-hole top hammer |
-
2014
- 2014-09-19 CN CN201420540095.1U patent/CN204060508U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265159A (en) * | 2014-09-19 | 2015-01-07 | 宜昌市五环钻机具有限责任公司 | Down hole hammer |
| CN104265159B (en) * | 2014-09-19 | 2016-09-21 | 宜昌市五环钻机具有限责任公司 | A kind of down-the-hole air hammer |
| CN108756730A (en) * | 2018-07-03 | 2018-11-06 | 苏州新锐合金工具股份有限公司 | A kind of down-the-hole top hammer |
| CN108756730B (en) * | 2018-07-03 | 2024-04-12 | 苏州新锐合金工具股份有限公司 | Down-the-hole top hammer |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |