CN102747968B - Drill rod coupler for down-the-hole drill - Google Patents
Drill rod coupler for down-the-hole drill Download PDFInfo
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- CN102747968B CN102747968B CN201210235842.6A CN201210235842A CN102747968B CN 102747968 B CN102747968 B CN 102747968B CN 201210235842 A CN201210235842 A CN 201210235842A CN 102747968 B CN102747968 B CN 102747968B
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- lower body
- upper body
- centering
- groove
- hemisphere
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Abstract
The invention discloses a drill rod coupler for a down-the-hole drill. The drill rod coupler comprises an upper body and a lower body which are respectively provided with a vent hole, a groove is arranged at the lower end of the upper body, a bump used for extending into the groove and then transferring the torque is arranged at the upper end of the lower body, a gap is left between the groove and the bump, and a centering airtight structure is arranged between the upper body and the lower body. The gap between the groove and the bump can be used for avoiding the bending of a drill rod in disturbance and reducing the fatigue breakage probability of the drill rod; compared with the prior art, after the coupler is adopted, the cheap drill rod can achieve the obvious effect of the expensive drill rod in the prior art, thus greatly lowering the construction cost; the centering airtight structure can play a role in transferring axial thrust when the drill rod is in drilling, and a role of air sealing under any circumstance, so that the sealing property of a chip removal air channel can be ensured, and high-pressure air can be used for dredging the blocking easily only by slightly lifting up the drill rod when the channel is blocked, so that the drill rod coupler is convenient and efficient to use.
Description
Technical field
The present invention relates to engineering rock drilling machinery field, particularly a kind of parts of rig.
Background technology
Rig is a kind of engineering machinery for rock-boring operation, be usually used in explosion drilling operation and geological drilling operation, large type drill carry on digger arm after, there is flexible, easy to use, the drilling efficiency advantages of higher of transfer, can effectively improve the operating efficiency of engineering construction, become gradually the main flow equipment of engineering driller.
The drilling rod of rig need be rotated and axial feed motion when creeping into simultaneously, and drilling rod drives rotation by motor and tooth case, and tooth case is fixed on the planker that can move along drilling direction, meanwhile, need to pass into high pressure chip removal air from drilling rod middle part.At present, for meeting the sealing etc. of drilling rod bonding strength and chip removal air duct, between the output of drilling rod and tooth case, adopt is connected firmly, due to geology rock hardness skewness, while causing rod boring, be complicated disturbance operating mode, therefore, adopt hardwired structure to have following problem: the easy fatigue fracture of drilling rod, the unstable easy damage of tooth case load, shorten application life, once drilling rod stop up, after needing drilling rod to set level by manually dredging, workload is large, and efficiency is low.Conventionally will adopt expensive high-strength drill pipe could maintain reluctantly working continuously of a period of time, and the price of this class drilling rod is every three or four thousand yuan of left and right, this has improved construction cost undoubtedly greatly.In recent years, also occurred on the market the rig that some drilling rods adopt shaft coupling to be connected with tooth case clutch end, but all there is the deficiencies such as complex structure, poor reliability, easily damage, poor air-tightness in these shaft couplings.
For above-mentioned deficiency, need to explore a kind of shaft coupling of dependable performance, make it can adapt to the disturbance operating mode of drilling rod, can meet again the requirement of ventilation tightness, to reduce the requirement of strength of rock drilling machine to drilling rod, extend the application life of drilling rod and equipment, reduce use cost.
Summary of the invention
In view of this, the invention provides a kind of down-the-hole drill drilling rod shaft coupling, this shaft coupling adopts spherical centering hermetically-sealed construction, can adapt to the disturbance operating mode of drilling rod, can meet again ventilation tightness requirement, can effectively solve that existing drilling rod syndeton is high to drilling rod requirement, the technical problem of poor air-tightness.
The present invention solves the problems of the technologies described above by following technological means:
Down-the-hole drill drilling rod shaft coupling of the present invention, comprise for connecting the upper body of rotary power output and for the lower body of jointed rod tail end, on described upper body and lower body, all along drilling rod pivot center, be provided with the air vent for delivery of chip removal air, the lower end of upper body arranges groove, the upper end of lower body is provided for stretching into the projection of transmitting torque after groove, between the end face of described upper body and lower body, all leave gap between groove and projection, between upper body and lower body, centering airtight construction is set.
Further, described centering airtight construction comprise be arranged at upper body lower end spherical groove, be arranged at the deep gouge of lower body upper end, with the chimeric centering hemisphere of spherical groove be arranged at the elastic body in deep gouge, planar ends and the deep gouge bottom of centering hemisphere withstood respectively at described elastomeric two ends, equal pore of setting and upper body and lower body air vent formation blanket gas circulation road on described centering hemisphere and elastic body.
Further, the planar ends of described centering hemisphere stretches in deep gouge, is provided with for withstanding the limited step of centering hemispherical plane end in described deep gouge.
Further, described elastic body is made by rubber.
Further, also comprise for connecting the follower bolt assembly of upper body and lower body, described follower bolt assembly comprises screw rod, nut, two servo-actuated spheroids and two tension springs, screw rod is connected upper body and lower body with nut, the screw vent outer end of upper body and lower body is provided with hemisphere groove, described two servo-actuated spheroids coordinate with the hemisphere groove on upper body and lower body respectively, in described two tension springs one is arranged between the servo-actuated spheroid of screw head and upper body, and another is arranged between nut and the servo-actuated spheroid of lower body.
Further, described tension spring is dish spring.
Further, described servo-actuated spheroid is hemisphere.
Further, described follower bolt assembly is at least two groups, and uniform around shaft coupling axis.
Beneficial effect of the present invention: down-the-hole drill drilling rod shaft coupling of the present invention, comprise for connecting the upper body of rotary power output and for the lower body of jointed rod tail end, on described upper body and lower body, all along drilling rod pivot center, be provided with the air vent for delivery of chip removal air, the lower end of upper body arranges groove, the upper end of lower body is provided for stretching into the projection of transmitting torque after groove, between the end face of described upper body and lower body, between groove and projection, leave gap, between upper body and lower body, centering airtight construction is set, the bending that gap between projection and groove produces in the time of can guaranteeing drilling rod disturbance reduces greatly, reduce the probability of drilling rod fatigue fracture, also effectively reduce the requirement of construction to drilling rod, than prior art, adopting and using price after shaft coupling of the present invention is the effect that the drilling rod of 400 yuan of left and right can reach 4000 yuan of left and right drilling rods of available technology adopting, construction cost reduces greatly, in addition, end thrust in the time of can transmitting rod boring by centering airtight construction, and the sealing of chip removal air duct while guaranteeing drilling rod no-load, when passage occurs to stop up, only drilling rod need be mentioned a little, pressure-air can will stop up dredging at an easy rate, easy to use efficient.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1.
The specific embodiment
Below with reference to accompanying drawing, the present invention is described in detail, as shown in the figure: the down-the-hole drill drilling rod shaft coupling of the present embodiment, comprise for connecting the upper body 1 of rotary power output and for the lower body 2 of jointed rod tail end, upper body 1 is provided with the internal thread for being connected with on lower body 2, on described upper body 1 and lower body 2, all along drilling rod pivot center, be provided with the air vent 3 for delivery of chip removal air, the lower end of upper body 1 arranges groove 1a, the upper end of lower body 2 is provided for stretching into the projection 2a of transmitting torque after groove 1a, between described upper body 1 and the end face of lower body 2, between groove 1a and projection 2a, all leave gap, when drilling rod disturbance, this gap can keep the degree of freedom of drilling rod tail end, prevent drill pipe buckling, greatly reduce the probability of the fatigue fracture of drilling rod, between upper body 1 and lower body 2, centering airtight construction is set, make to be unlikely to depart between upper and lower body, simultaneously, also can guarantee the sealing of chip removal air duct.
Further improvement as technique scheme, described centering airtight construction comprises the spherical groove 4 that is arranged at upper body 1 lower end, be arranged at the deep gouge 5 of lower body 2 upper ends, with the chimeric centering hemisphere of spherical groove 46 be arranged at the elastic body 7 in deep gouge 5, sphere-contact can be realized certralizing ability, can reach good sealing effectiveness again, simultaneously can also be when rod boring transferring axial thrust, in addition, hemisphere can adopt steel ball line to be cut into, a steel ball can be manufactured two centering hemisphere, stock utilization is high, be conducive to control cost, planar ends and deep gouge 5 bottoms of centering hemisphere 6 are withstood respectively at the two ends of described elastic body 7, the pore 8 that forms blanket gas circulation road with upper body 1 and lower body 2 air vents is all set on described centering hemisphere 6 and elastic body 7, elastic body is all the time in compressive state, can guarantee himself and centering hemisphere planar ends between sealing, the sealing of himself and deep gouge bottom, simultaneously, it applies the elastic force hemisphere that makes to feel relieved to centering hemisphere and is close to spherical groove, reach good sealing effectiveness, when drilling rod is mentioned, elastic body extends under elastic force effect, continue to withstand centering hemisphere, guarantee tightness, compressed air can not lose pressure, be easy to the drilling rod dredging of stopping up.
Further improvement as technique scheme, the planar ends of described centering hemisphere 6 stretches in deep gouge 5, is provided with for withstanding the limited step 5a of centering hemisphere 6 planar ends, while creeping in described deep gouge 5, this limited step transmitter shaft, to centripetal force, prevents from damaging by pressure elastic body.
As the further improvement of technique scheme, described elastic body 7 is made by rubber, is easy to manufacture, and cost is low.
Further improvement as technique scheme, also comprise for connecting the follower bolt assembly of upper body 1 and lower body 2, described follower bolt assembly comprises screw rod 9, nut 10, two servo-actuated spheroids 11 and two tension springs 12, screw rod 9 is connected upper body 1 and lower body 2 with nut 10, the screw vent outer end of upper body 1 and lower body 2 is provided with hemisphere groove, described two servo-actuated spheroids 11 coordinate with the hemisphere groove on upper body 1 and lower body 2 respectively, one in described two tension springs 12 is arranged between screw rod 9 heads and the servo-actuated spheroid of upper body 1, another is arranged between nut 10 and the servo-actuated spheroid of lower body 2, by servo-actuated spheroid and tension spring structure, can guarantee when drilling rod disturbance, while descending body to rotate with respect to upper body, screw rod stressed all the time less, avoid screw rod to occur crooked damage.
As the further improvement of technique scheme, described tension spring 12 is dish spring, and load is large, and stroke is short, and requisite space is little, is used in combination conveniently, and maintenance changes the outfit easily, and economy and security is high.
As the further improvement of technique scheme, described servo-actuated spheroid 11 is hemisphere, can adopt equally steel ball to be cut into two hemisphere, and production efficiency is high, and cost is low.
As the further improvement of technique scheme, described follower bolt assembly is at least two groups, and uniform around shaft coupling axis, and the present embodiment adopts 4 groups of bolt assemblies, and stress condition is good, not fragile.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (7)
1. a down-the-hole drill drilling rod shaft coupling, it is characterized in that: comprise upper body (1) for connecting rotary power output and for the lower body (2) of jointed rod tail end, described upper body (1) and lower body (2) are upper is all provided with the air vent (3) for delivery of chip removal air along drilling rod pivot center, the lower end of upper body (1) arranges groove (1a), the upper end of lower body (2) is provided for stretching into the projection (2a) of the rear transmitting torque of groove (1a), between the end face of described upper body (1) and lower body (2), between groove (1a) and projection (2a), all leave gap, between upper body (1) and lower body (2), centering airtight construction is set, described centering airtight construction comprises the spherical groove (4) that is arranged at upper body (1) lower end, be arranged at the deep gouge (5) of lower body (2) upper end, with the chimeric centering hemisphere (6) of spherical groove (4) be arranged at the elastic body (7) in deep gouge (5), planar ends and deep gouge (5) bottom of centering hemisphere (6) withstood respectively at the two ends of described elastic body (7), the pore (8) that forms blanket gas circulation road with upper body (1) and lower body (2) air vent is all set on described centering hemisphere (6) and elastic body (7).
2. down-the-hole drill drilling rod shaft coupling according to claim 1, is characterized in that: the planar ends of described centering hemisphere (6) stretches in deep gouge (5), is provided with for withstanding the limited step (5a) of centering hemisphere (6) planar ends in described deep gouge (5).
3. down-the-hole drill drilling rod shaft coupling according to claim 2, is characterized in that: described elastic body (7) is made by rubber.
4. according to the down-the-hole drill drilling rod shaft coupling described in claim 1-3 any one, it is characterized in that: also comprise for connecting the follower bolt assembly of upper body (1) and lower body (2), described follower bolt assembly comprises screw rod (9), nut (10), two servo-actuated spheroids (11) and two tension springs (12), screw rod (9) is connected upper body (1) and lower body (2) with nut (10), the screw vent outer end of upper body (1) and lower body (2) is provided with hemisphere groove, described two servo-actuated spheroids (11) coordinate with the hemisphere groove on upper body (1) and lower body (2) respectively, one in described two tension springs (12) is arranged between screw rod (9) head and the servo-actuated spheroid of upper body (1), another is arranged between nut (10) and the servo-actuated spheroid of lower body (2).
5. down-the-hole drill drilling rod shaft coupling according to claim 4, is characterized in that: described tension spring (12) is dish spring.
6. down-the-hole drill drilling rod shaft coupling according to claim 5, is characterized in that: described servo-actuated spheroid (11) is hemisphere.
7. down-the-hole drill drilling rod shaft coupling according to claim 6, is characterized in that: described follower bolt assembly is at least two groups, and uniform around shaft coupling axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210235842.6A CN102747968B (en) | 2012-07-09 | 2012-07-09 | Drill rod coupler for down-the-hole drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210235842.6A CN102747968B (en) | 2012-07-09 | 2012-07-09 | Drill rod coupler for down-the-hole drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102747968A CN102747968A (en) | 2012-10-24 |
| CN102747968B true CN102747968B (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210235842.6A Expired - Fee Related CN102747968B (en) | 2012-07-09 | 2012-07-09 | Drill rod coupler for down-the-hole drill |
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| Country | Link |
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| CN (1) | CN102747968B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827802B (en) * | 2019-03-12 | 2021-09-10 | 北京铁城检测认证有限公司 | Soil sampling equipment for measuring compactness by sand filling method |
| CN112324333B (en) * | 2020-10-22 | 2022-08-02 | 河北省水利工程局 | Construction method for horizontal directional crossing of complex pebble-gravel stratum by underground pipeline |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB960139A (en) * | 1961-11-28 | 1964-06-10 | Shell Int Research | Flexible pipe joint |
| US7063175B1 (en) * | 2004-06-16 | 2006-06-20 | Scott Kerstetter | Method and apparatus for retaining a down-hole fluid motor and bit assembly |
| CN201406996Y (en) * | 2009-04-03 | 2010-02-17 | 罗师竹 | Shallow underground piercing machine drill rod connector |
| CN101694151A (en) * | 2009-09-27 | 2010-04-14 | 北京市三一重机有限公司 | In-the-hole drill and vibration absorber thereof |
| CN201851033U (en) * | 2010-11-19 | 2011-06-01 | 鞍钢集团矿业公司 | Connector used for rotary drilling machine |
| CN202731768U (en) * | 2012-07-09 | 2013-02-13 | 重庆博山工程机械设备有限公司 | Drill rod coupling of down-the-hole drill |
-
2012
- 2012-07-09 CN CN201210235842.6A patent/CN102747968B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB960139A (en) * | 1961-11-28 | 1964-06-10 | Shell Int Research | Flexible pipe joint |
| US3168334A (en) * | 1961-11-28 | 1965-02-02 | Shell Oil Co | Flexible pipe joint |
| US7063175B1 (en) * | 2004-06-16 | 2006-06-20 | Scott Kerstetter | Method and apparatus for retaining a down-hole fluid motor and bit assembly |
| CN201406996Y (en) * | 2009-04-03 | 2010-02-17 | 罗师竹 | Shallow underground piercing machine drill rod connector |
| CN101694151A (en) * | 2009-09-27 | 2010-04-14 | 北京市三一重机有限公司 | In-the-hole drill and vibration absorber thereof |
| CN201851033U (en) * | 2010-11-19 | 2011-06-01 | 鞍钢集团矿业公司 | Connector used for rotary drilling machine |
| CN202731768U (en) * | 2012-07-09 | 2013-02-13 | 重庆博山工程机械设备有限公司 | Drill rod coupling of down-the-hole drill |
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|---|---|
| CN102747968A (en) | 2012-10-24 |
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