CN201460718U - Valveless single-cylinder type middle-low air pressure downhole impactor - Google Patents
Valveless single-cylinder type middle-low air pressure downhole impactor Download PDFInfo
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- CN201460718U CN201460718U CN2009200862506U CN200920086250U CN201460718U CN 201460718 U CN201460718 U CN 201460718U CN 2009200862506 U CN2009200862506 U CN 2009200862506U CN 200920086250 U CN200920086250 U CN 200920086250U CN 201460718 U CN201460718 U CN 201460718U
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Abstract
A valveless single-cylinder type middle-low air pressure downhole impactor comprises an outer sleeve. A rear connector is arranged at one end of the outer sleeve, and a drill head is arranged at the other end of the outer sleeve; an inverted valve is arranged in the outer sleeve; a flexible spring is arranged in the inverted valve; a radial hole is formed at one end of a gas distribution rod; the gas distribution rod is matched with a piston; a central passage is formed in the piston; an inner annular groove is formed on the central passage; an upper air hole is formed at the lower part of the piston and communicated with the inner annular groove through an inclined hole; a gas tank is arranged at the upper part of the piston; one end of an upper inclined hole is communicated with the gas tank, and the other end thereof is matched with the radial hole; the piston is matched with the drill head and a guide sleeve; and a positioning device is arranged on a valve base. The utility model enlarges the effective working diameter of a cylinder body to lead the piston to obtain greater impact energy, simplifies the gas distribution passage, reduces the gas pressure loss, is capable of being used under the middle-low air pressure, improves the hole drilling efficiency and reduces the energy consumption; moreover, the problem of positioning and guiding the gas distribution rod is solved by adopting the positioning device, so that the impactor can be in effective and stable operation.
Description
Technical field
The utility model relates to a kind of Pneumatic immpacting boring equipment, particularly a kind of low blast down-the-hole air hammer of valveless single cylinder type that is used for mine, engineering Drilling shot hole etc.
Background technology
Employed low blast down-the-hole air hammer is for there being valve twin-tub type at present, its outer tube and cylinder form interior outer shell, valve actuating mechanism has valve block, send into the compressed air of impactor through drilling rod and alternately deliver to piston front and back air cavity respectively by the valve block displacement, make piston reciprocates come drill hammer, at the bottom of impact energy imposed on the rock blasting hole, and along with the rig slew gear rotates and pore-forming together.There are some disadvantages in this type of down-the-hole air hammer: the one, because complex structure, the parts that need do mutual motion are many, and air consumption is big, energy consumption is big, inefficiency; The 2nd, valve block acts frequently, damage easily, thus the fault of causing; The 3rd, the scope of application is little, can only be at low blast (pressure 5-8Kg/cm
2) use under the scope.
Summary of the invention
The purpose of this utility model be to provide a kind of simple in structure, atmospheric pressure lost is little, high efficiency, impactor for a long time steady operation and be applicable in low blast down-the-hole air hammer in the valveless single cylinder type of low blast.
The purpose of this utility model is achieved in that low blast down-the-hole air hammer in a kind of valveless single cylinder type, comprise outer tube, outer tube one end is the back joint, the other end is a drill bit, establish on the back joint and be used for the tapered screw thread that is connected with drilling rod, non retern valve places in the outer tube, be provided with flexure spring in the non retern valve, distribution bar one end is provided with radial hole, and the distribution bar matches with piston, is provided with central duct in the piston, central duct is provided with inner groove, the piston bottom is provided with pore, and last pore communicates with inner groove by inclined hole, and piston top is provided with air drain, last inclined hole one end communicates with air drain, the other end matches with radial hole, and piston matches with drill bit and fairlead, and valve seat is provided with positioner.
In the described positioner, positioning sleeve is connected by hanging pin with the distribution bar with valve seat.
Described fairlead is provided with at least one bleeder port.
Hang down the blast down-the-hole air hammer in a kind of valveless single cylinder type that the utility model provides, cancelled the cylinder and the valve block of former gazogene structure, enlarged effective working diameter of cylinder body, make piston can obtain bigger impact energy; The distribution gas circuit has been simplified in the distribution action that the distribution bar matches with piston and finishes piston motion, has reduced the gas pressure loss; Have only piston movable in the whole impactor structure, can adapt to the variation significantly of gas pressure, can in use under the low blast, the blast scope of application is by 5-8Kg/cm
2Increase to 5-12Kg/cm
2, improved down-the-hole drilling efficient; Utilize the preceding air chamber at piston two ends and the pressure differential of rear gas chamber to promote piston motion, utilize gas expansion for doing work, greatly reduce energy consumption; Positioner on the valve seat has solved the location and the guiding problem of distribution bar, and impactor can be moved by efficient stable; Bleeder port on the fairlead can reduce piston air cushion reaction force in front side when stroke movement, makes piston have bigger impact energy, thereby has improved rate of penetration.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, the utility model comprises outer tube 12, outer tube 12 1 ends are back joint 1, the other end is a drill bit 18, establish on the back joint 1 and be used for the tapered screw thread 2 that is connected with drilling rod, non retern valve 3 places in the outer tube 12, be provided with flexure spring 4 in the non retern valve 3, distribution bar 9 one ends are provided with radial hole 5, and distribution bar 9 matches with piston 11, is provided with central duct 8 in the piston 11, central duct 8 is provided with inner groove 7, piston 11 bottoms are provided with pore 13, and last pore 13 communicates with inner groove 7 by inclined hole 6, and piston 11 tops are provided with air drain 10, last inclined hole 14 1 ends communicate with air drain 10, the other end matches with radial hole 5, and piston 11 matches with drill bit 18 and fairlead 16, and valve seat 5 is provided with positioner.
In the described positioner, positioning sleeve 15 is connected by hanging pin 17 with distribution bar 9 with valve seat 5.
Described fairlead 16 is provided with at least one bleeder port 19.
Non retern valve 3 is to prevent that magma from flowing into the one way valve in the impactor.
Operating principle of the present utility model is as follows:
For starting impactor, earlier drill bit 18 is contacted with rock and jack-up piston 11, gases at high pressure enter distribution bar central duct 20 by back joint 1, last inclined hole 14 on the radial hole on the distribution bar 95, piston 11 and air drain 10 arrive the preceding air chamber of being made up of piston 11, outer tube 12 and fairlead 16 21, gas pressure forces piston to retreat, and piston begins the return motion.At this moment, the last pore 13 of waste gas on piston 11, the inner groove 7 that inclined hole 6 enters piston 11 in the rear gas chamber 22 that is made up of piston 11, outer tube 12 and distribution bar 9 blow slag through central duct 8 and 23 discharges of bit central hole.
In the return motion, piston 11 continues to retreat because of inertia, and the pressure that produces up to the gas that enters rear gas chamber 22 forces piston 11 to stop the return motion.At this moment, piston 11 has been thrown off fairlead 16, radial hole 5 on the distribution bar 9 communicates with inclined hole 6 on the piston 11, gas expands in the rear gas chamber 22, waste gas in the preceding air chamber 21 is discharged through fairlead endoporus, bit central hole 23, air chamber 21 forms low pressure chamber before making, and begins stroke movement under the piston 11 pressure effect that gas expands in rear gas chamber 22, and high-speed impact drill bit caudal peduncle is finished once boring action.
As mentioned above, air chamber 21 and rear gas chamber 22 carried out the return and the stroke movement of piston 11 before gases at high pressure were alternately entered by the radial hole on the distribution bar 95, thereby drove drill bit 18 work.
Before increased the air drain space on the air chamber 21, can make this utility model flushing cinder when low blast section operation unimpeded.
Claims (3)
1. hang down the blast down-the-hole air hammer in a valveless single cylinder type, comprise outer tube (12), outer tube (12) one ends are back joint (1), the other end is drill bit (18), establish on the back joint (1) and be used for the tapered screw thread (2) that is connected with drilling rod, non retern valve (3) places in the outer tube (12), be provided with flexure spring (4) in the non retern valve (3), it is characterized in that: distribution bar (9) one ends are provided with radial hole (5), distribution bar (9) matches with piston (11), be provided with central duct (8) in the piston (11), central duct (8) is provided with inner groove (7), piston (11) bottom is provided with pore (13), and last pore (13) communicates with inner groove (7) by inclined hole (6), and piston (11) top is provided with air drain (10), last inclined hole (14) one ends communicate with air drain (10), the other end matches with radial hole (5), and piston (11) matches with drill bit (18) and fairlead (16), and valve seat (5) is provided with positioner.
2. low blast down-the-hole air hammer in a kind of valveless single cylinder type according to claim 1 is characterized in that: in the described positioner, positioning sleeve (15) is connected by hanging pin (17) with distribution bar (9) with valve seat (5).
3. low blast down-the-hole air hammer in a kind of valveless single cylinder type according to claim 1, it is characterized in that: described fairlead (16) is provided with at least one bleeder port (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200862506U CN201460718U (en) | 2009-06-04 | 2009-06-04 | Valveless single-cylinder type middle-low air pressure downhole impactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200862506U CN201460718U (en) | 2009-06-04 | 2009-06-04 | Valveless single-cylinder type middle-low air pressure downhole impactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201460718U true CN201460718U (en) | 2010-05-12 |
Family
ID=42388072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200862506U Expired - Fee Related CN201460718U (en) | 2009-06-04 | 2009-06-04 | Valveless single-cylinder type middle-low air pressure downhole impactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201460718U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949260A (en) * | 2010-07-22 | 2011-01-19 | 浙江师范大学 | Auxiliary hammer mechanism of percussive hammer capable of releasing after storing energy and energy-storage type percussive hammer |
| CN102003139A (en) * | 2010-10-12 | 2011-04-06 | 贵州航天天马机电科技有限公司 | Single body large-diameter pneumatic down-the-hole hammer |
| CN102434094A (en) * | 2010-09-29 | 2012-05-02 | 宜昌市五环钻机具有限责任公司 | Piston tail pipe type impacter of valveless single-cylinder type downhole |
| CN102434093A (en) * | 2010-09-29 | 2012-05-02 | 宜昌市五环钻机具有限责任公司 | Piston-guide-sleeve-type valveless single-cylinder-type high-efficiency down-hole hammer |
-
2009
- 2009-06-04 CN CN2009200862506U patent/CN201460718U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949260A (en) * | 2010-07-22 | 2011-01-19 | 浙江师范大学 | Auxiliary hammer mechanism of percussive hammer capable of releasing after storing energy and energy-storage type percussive hammer |
| CN101949260B (en) * | 2010-07-22 | 2013-07-24 | 浙江师范大学 | Auxiliary hammer mechanism of percussive hammer capable of releasing after storing energy and energy-storage type percussive hammer |
| CN102434094A (en) * | 2010-09-29 | 2012-05-02 | 宜昌市五环钻机具有限责任公司 | Piston tail pipe type impacter of valveless single-cylinder type downhole |
| CN102434093A (en) * | 2010-09-29 | 2012-05-02 | 宜昌市五环钻机具有限责任公司 | Piston-guide-sleeve-type valveless single-cylinder-type high-efficiency down-hole hammer |
| CN102003139A (en) * | 2010-10-12 | 2011-04-06 | 贵州航天天马机电科技有限公司 | Single body large-diameter pneumatic down-the-hole hammer |
| CN102003139B (en) * | 2010-10-12 | 2012-12-19 | 贵州航天天马机电科技有限公司 | Single body large-diameter pneumatic down-the-hole hammer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20160604 |