CN109505525B - Drill rod and drill bit shank sealing structure for anchor rod drilling machine - Google Patents
Drill rod and drill bit shank sealing structure for anchor rod drilling machine Download PDFInfo
- Publication number
- CN109505525B CN109505525B CN201910015439.4A CN201910015439A CN109505525B CN 109505525 B CN109505525 B CN 109505525B CN 201910015439 A CN201910015439 A CN 201910015439A CN 109505525 B CN109505525 B CN 109505525B
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- Prior art keywords
- drill
- sleeve
- drill rod
- shank
- packing
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- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 title claims abstract description 71
- 238000005553 drilling Methods 0.000 title description 16
- 238000012856 packing Methods 0.000 claims abstract description 39
- 230000000694 effects Effects 0.000 claims abstract description 10
- 239000007921 spray Substances 0.000 claims description 58
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 36
- 238000005065 mining Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000000605 extraction Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of mining equipment, and discloses a drill rod and drill shank sealing structure for a jumbolter. Compared with the original seal, the hydraulic pressure is used for pushing the packing sleeve to be in contact seal with the seal ring, the situation that the seal ring is directly deformed by the rigid body pressure is changed, the impact pressure generated by the drill rod and the drill rod sleeve is directly transmitted to the drill rod sleeve through the drill rod handle, and the seal ring is not influenced by direct impact, so that the seal ring is well guaranteed to bear the water pressure transmitted by the packing sleeve only when the water pressure exists, the fatigue deformation of the seal ring due to reciprocating impact is avoided on the premise of ensuring the seal effect, and the service life of the seal ring is further prolonged.
Description
Technical Field
The invention relates to the technical field of mining equipment, in particular to a drill rod and drill shank sealing structure for a jumbolter.
Background
The wet-type jumbolter is used for drilling holes in coal mine rock drilling, a support anchor rod is installed, the middle of a drill rod for drilling is hollow, water is sprayed to the rock drilling position, rock cuttings in the drilled holes are wetted and flow out, and dust of a working environment is relieved while the drilled holes are prevented from being blocked. At present, the sealing structures adopted on the drill sleeve and the drill rod of the anchor rod drilling machine are all drill rod tail external mounted type O-shaped ring sealing, the sealing mode needs certain compression amount of the O-shaped ring, therefore, the physical power of workers is greatly consumed in the frequent plugging and unplugging process of the drill rod and the drill sleeve, in view of the above, the Chinese patent No. CN100445513 proposes a self-tightening sealing drill sleeve and a drill rod of the anchor rod drilling machine by the feeding thrust, the sealing effect is effectively improved, the problem of labor waste in plugging and unplugging of the drill rod is solved, however, the sealing ring is extruded by the drill rod body and the water nozzle to realize sealing, the sealing ring is repeatedly extruded and deformed in the continuous reciprocating plugging and unplugging process of the drill rod body, meanwhile, in the drilling process, the drill rod body and the lower part of the cutting sleeve can generate impact extrusion, the force of the impact extrusion is always in a dynamic change state due to the change of the drilling depth and the rock hardness, the sealing washer is easy to take place extrusion fatigue deformation, and makes the contact lead to the frictional force grow between sealing washer and the water injection well choke, will cause the difficult plug of borer body of rod and sealing washer to lose the best sealed effect, for this reason, provides a seal structure of this department, aims at solving above-mentioned problem.
Disclosure of Invention
Aiming at the defects of the prior drill rod and drill rod tail sealing mechanism of the anchor rod drilling machine in the background technology in the using process, the invention provides the drill rod and drill rod tail sealing structure used by the anchor rod drilling machine, which has the advantages of more labor-saving operation of inserting and pulling the drill rod and longer service life of a sealing ring, and solves the problem of short service life of the sealing ring caused by fatigue deformation of the sealing ring due to reciprocating impact deformation in the background technology.
The invention provides the following technical scheme: a sealing structure for a drill rod and a drill shank used by a jumbolter comprises the drill rod, a drill shank, a sealing ring and a drill sleeve, wherein the drill shank is fixedly sleeved at the end part of the drill rod, the sealing ring is fixedly connected at one end of the drill rod, the drill sleeve is movably sleeved outside the drill shank and consists of an upper section and a lower section which are welded together, the upper section of the drill sleeve is sleeved with the drill shank, the lower section end part of the drill sleeve is contacted with the end part of the drill shank, the lower section of the drill sleeve is sleeved with a nozzle sealing mechanism, the nozzle sealing mechanism consists of a spray head, a spray tail and a packing sleeve, the spray head is in threaded connection with the spray tail, the free end part of the spray head is movably sleeved with the inside of the drill rod, the free end part of the spray tail is fixedly sleeved with the lower section of the drill sleeve, a circular truncated cone-shaped flow guide cavity is enclosed by the end face of the connection part of the spray, the inside of sealing the chamber is equipped with the packing cover, the minor diameter end of packing cover stretches out and seals the chamber and correspond the arrangement with the annular end face of sealing washer.
Preferably, the distance between the end face of the sealing ring and one end of the packing sleeve is smaller than the stroke of the packing sleeve in the inner cavity of the packing cavity.
Preferably, one end of the spray head and the inner wall of the spray tail just form a conical surface at the inlet of the flow guide cavity.
Preferably, the outer wall of the spray head and the inner wall of the sealing ring form a gap.
The invention has the following beneficial effects:
1. compared with the original seal, the water pressure pushes the packing sleeve to be in contact with the seal ring for sealing, so that the situation that the seal ring is directly deformed by the rigid body pressure is changed, the impact pressure generated by the drill rod and the drill sleeve is directly transmitted to the drill rod sleeve through the drill shank, and the seal ring is not influenced by direct impact, so that the seal ring is well ensured to bear the water pressure transmitted by the packing sleeve only under the water pressure, the seal ring is prevented from being subjected to fatigue deformation due to reciprocating impact on the premise of ensuring the sealing effect, and the service life of the seal ring is further prolonged.
2. According to the invention, the gap is formed between the sealing ring and the spray head, the sealing effect of the sealing ring is changed from end face sealing, and the sealing ring is not deformed by pressure and is in contact sealing with the outer wall of the spray head, so that when the water pressure works, water can fill the gap between the spray head and the sealing ring to form a thin water layer, when drilling is finished and the drill rod is plugged and pulled, the water pressure is removed, the thin water layer between the spray head and the sealing ring provides a lubricating effect, and the drill rod and the spray head can be conveniently separated.
3. According to the invention, through setting the change of the sectional areas of the spray head and the spray tail inner cavity, the sectional area of the water column is reduced after the high-pressure water column in the spray tail is shunted by the diversion cavity, and the flow speed of the fluid flowing through the spray head is increased according to the relation between the flow rate of hydrodynamics and the flow speed and the sectional area, so that the situation that the water pressure is reduced because the fluid flows into the sealed cavity is compensated.
Drawings
FIG. 1 is a cross-sectional view of the structure of the present invention;
FIG. 2 is a schematic structural view of a nozzle sealing mechanism according to the present invention;
FIG. 3 is a disassembled view of the nozzle sealing mechanism of the present invention;
FIG. 4 is a schematic perspective view of the packing sleeve of the present invention.
In the figure: 1. a drill rod; 2. a shank; 3. a seal ring; 4. a drill sleeve; 5. a nozzle sealing mechanism; 51. a spray head; 52. spraying the tail; 53. sealing the separate cavity; 54. sealing a spacer bush; 55. and a flow guide cavity.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a sealing structure of a drill rod and a drill shank used for a jumbolter comprises a drill rod 1, a drill shank 2, a sealing ring 3 and a drill sleeve 4, wherein the end of the drill rod 1 is fixedly sleeved with the drill shank 2, one end of the drill rod 1 is fixedly connected with the sealing ring 3, the drill sleeve 4 is movably sleeved outside the drill shank 2, the drill sleeve 4 is formed by welding an upper section and a lower section, the upper section of the drill sleeve 4 is sleeved with the drill shank 2, the lower section of the drill sleeve 4 is contacted with the end of the drill shank 2, the lower section of the drill sleeve 4 is sleeved with a nozzle sealing mechanism 5, the nozzle sealing mechanism 5 is composed of a spray head 51, a spray tail 52 and a packing sleeve 54, the spray head 51 is in threaded connection with the spray tail 52, the free end of the spray head 51 is movably sleeved inside the drill rod 1, the free end of the spray tail 52 is fixedly sleeved with the lower section of the drill sleeve 4, the end face of the connection part of, the inner wall of the spray head 51 is provided with an annular packing cavity 53, a packing sleeve 54 is arranged inside the packing cavity 53, and the small-diameter end of the packing sleeve 54 extends out of the packing cavity 53 and is arranged corresponding to the annular end face of the sealing ring 3.
The distance between the end surface of the sealing ring 3 and one end of the packing sleeve 54 is smaller than the stroke of the packing sleeve 54 in the inner cavity of the packing cavity 53, and this setting is to achieve that the packing sleeve 54 and the sealing ring 3 generate a pushing effect in the range of the walking stroke of the packing cavity 53 to achieve sealing performance, and meanwhile, on the premise of facilitating actual installation of the packing sleeve 54, the area of the free end surface of the packing sleeve 54 is properly increased to increase the contact area of the packing sleeve 54 and the sealing ring 3, so that the sealing effect at the position can be improved, and the packing sleeve 54 and the inner cavity of the packing cavity 53 need to form a group of structures similar to a piston and a piston cylinder, so that the packing sleeve 54 separates the packing cavity 53 into two chambers in the packing cavity 53.
Wherein, one end of the nozzle 51 and the inner wall of the spray tail 52 just form a conical surface at the inlet of the diversion cavity 55, referring to fig. 2, the end of the nozzle 51 extends into the spray tail 52, so that the arc-shaped surface of the end part of the spray head 51 and the arc-shaped surface of the inner wall of the spray tail 52 just form a circular truncated cone-shaped guide cavity 55, i.e., the annular hollow diversion cavity 55, at the inlet of the diversion cavity 55, i.e., the proximal ends of the inner cavities of the spray head 51 and the spray tail 52, a conical surface is formed, the conical surface forms a continuous chamber of variable cross-section from the interior of the spray tail 52 to the interior of the spray head 51, the arrangement being such that, as the high pressure water column within the spray tail 52 passes through the diversion chamber 55, because part of water enters the sealed separation cavity 53 to cause pressure loss of a high-pressure water column, the variable cross section is arranged by utilizing the continuity equation principle of hydrodynamics, the flow rate into the nozzle 51 is increased relative to the nozzle tail 52 to compensate for the pressure loss at the nozzle tail 52 into the compartment 53.
Wherein, the outer wall of the spray head 51 and the inner wall of the seal ring 3 form a gap, which will retain water after being filled with water column to form an annular thin water layer, when the high-pressure water column supply is stopped, the residual water layer between the seal ring 3 and the spray head 51 can provide lubricating effect, which is convenient for the drill rod 1 to drive the seal ring 3 to be pulled out, in fact, because the high-pressure water column in the drill rod 1 is always sprayed towards the free end of the drill rod 1, i.e. little water can form pressure to be pressed into the interior of the seal ring 3 and the spray head 51, only when the water outlet at the free end of the drill rod 1 is blocked due to short time in the drilling process, the water is pressed into the seal ring 3 and the spray head 51, and in the drilling process, because the contact pressure between the drill rod 1 and rock changes, the short-time water pressure in the interior of the drill rod 1 can not be avoided, and the gap between the seal ring 3 and, therefore, the arrangement further improves the effect of easy insertion and extraction on the premise of not changing the original design concept of easy insertion and extraction of the drill rod, in fact, in the original component, because the sealing ring 3 is pressed and sealed, in the insertion and extraction process, because the sealing ring 3 needs time for deformation and reset, under the condition of high-frequency insertion and extraction of the drill rod 1, the frictional resistance always exists between the sealing ring 3 and the spray head 51, so that the insertion and extraction actions of workers are laborious, and on the contrary, the invention better solves the problem of frictional resistance between the sealing ring 3 and the spray head 51 under the condition of high-frequency insertion and extraction.
The working principle of the invention is as follows:
inserting the drill rod 1 into the drill sleeve 4, enabling one end of the drill shank 2 to be in contact with the lower section of the drill sleeve 4, introducing high-pressure water columns into the spray tail 52, enabling part of the high-pressure water columns to enter the seal separation cavity 53 through the flow guide cavity 55, ejecting the seal separation sleeve 54 to enable the seal separation sleeve 54 to be in close contact with the seal ring 3, completing sealing, and enabling the other part of the high-pressure water columns to be sprayed into the inner cavity of the drill rod 1 through the inner cavity of the spray head 51; in the drilling operation of the equipment, high-pressure water columns are provided all the time, the drill rod 1 is pressed and transmitted to the lower section of the drill sleeve 4 through the drill shank 2, and the sealing ring 3 is not directly subjected to the action of impact pressure; before the drill rod 1 is pulled out, the high-pressure water column injection is stopped, the packer sleeve 54 loses the water pressure effect, a thin water layer exists in the gap between the spray head 51 and the sealing ring 3, the lubricating effect among the drill rod 1, the sealing ring 3 and the spray head 51 is provided, and then the drill rod 1 is pulled out.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a drill rod and bore bit tail seal structure that roofbolter used, includes drill rod (1), drill shank (2), sealing washer (3) and drill sleeve (4), the fixed drill shank (2) that has cup jointed in tip of drill rod (1), the one end fixedly connected with sealing washer (3) of drill rod (1), drill sleeve (4) have been cup jointed in the outside activity of drill shank (2), two sections welding constitutions about drill sleeve (4) have, the suit is accomplished with drill shank (2) to the upper segment of drill sleeve (4), the hypomere tip of drill sleeve (4) and the tip contact of drill shank (2), its characterized in that: the drill rod sealing device is characterized in that a nozzle sealing mechanism (5) is sleeved on the lower section of the drill rod sleeve (4), the nozzle sealing mechanism (5) is composed of a spray head (51), a spray tail (52) and a packing sleeve (54), the spray head (51) is in threaded connection with the spray tail (52), the free end portion of the spray head (51) is movably sleeved with the interior of a drill rod (1), the free end portion of the spray tail (52) is fixedly sleeved with the lower section of the drill rod sleeve (4), the end face of the joint of the spray head (51) and the spray tail (52) encloses a circular truncated cone-shaped flow guide cavity (55), an annular packing cavity (53) is formed in the inner wall of the spray head (51), the packing sleeve (54) is arranged in the packing cavity (53), and the small-diameter end of the packing sleeve (54) extends out of the packing cavity (53) and is arranged corresponding to the annular end face of the sealing ring (.
2. The seal structure of a shank and a shank adapter for a jumbolter according to claim 1, wherein: the distance between the end surface of the sealing ring (3) and one end of the packing sleeve (54) is smaller than the stroke of the packing sleeve (54) in the inner cavity of the packing cavity (53).
3. The seal structure of a shank and a shank adapter for a jumbolter according to claim 1, wherein: one end of the spray head (51) and the inner wall of the spray tail (52) form a conical surface at the inlet of the flow guide cavity (55).
4. The seal structure of a shank and a shank adapter for a jumbolter according to claim 1, wherein: a gap is formed between the outer wall of the spray head (51) and the inner wall of the sealing ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015439.4A CN109505525B (en) | 2019-01-08 | 2019-01-08 | Drill rod and drill bit shank sealing structure for anchor rod drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015439.4A CN109505525B (en) | 2019-01-08 | 2019-01-08 | Drill rod and drill bit shank sealing structure for anchor rod drilling machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109505525A CN109505525A (en) | 2019-03-22 |
| CN109505525B true CN109505525B (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910015439.4A Expired - Fee Related CN109505525B (en) | 2019-01-08 | 2019-01-08 | Drill rod and drill bit shank sealing structure for anchor rod drilling machine |
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| Country | Link |
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| CN (1) | CN109505525B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111299971A (en) * | 2020-03-02 | 2020-06-19 | 贵州捷盛钻具股份有限公司 | Welding process of drill rod and drill shank |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2301582Y (en) * | 1997-07-16 | 1998-12-23 | 中外合资柳州欧维姆建筑机械有限公司 | Sealing device |
| CN2385196Y (en) * | 1999-02-08 | 2000-06-28 | 孟忠敏 | Pressure sealing pipe-connecting structure |
| CN2477801Y (en) * | 2001-04-25 | 2002-02-20 | 陈树林 | Feeding thrust self-fastening sealing drill rod sleeve and drill rod of rockbolt drilling machine |
| CN201190540Y (en) * | 2008-03-24 | 2009-02-04 | 张建平 | Air-water dual-purpose inserting outburst-prevention drill rod |
| AU2009202836A1 (en) * | 2008-09-18 | 2010-04-08 | Peter Andrew Gray | An injection, sealing, valving and passageway system |
| CN201753777U (en) * | 2010-05-21 | 2011-03-02 | 上海冠龙阀门机械有限公司 | Hydraulic control valve |
| CN202531835U (en) * | 2011-12-30 | 2012-11-14 | 中船重工中南装备有限责任公司 | Bit shank sealing device for hydraulic rock drilling machine |
| CN203978313U (en) * | 2014-08-18 | 2014-12-03 | 中煤科工集团重庆研究院有限公司 | Water under high pressure conveyer |
| CN204042263U (en) * | 2014-09-18 | 2014-12-24 | 平顶山市安泰华矿用安全设备制造有限公司 | A kind of to the connecting head of drilling rod water supply high service device |
| CN204540743U (en) * | 2014-12-23 | 2015-08-12 | 江苏牧羊控股有限公司 | A kind of quick detach nozzle |
| CN205100928U (en) * | 2015-10-26 | 2016-03-23 | 永城煤电控股集团有限公司 | Spy drain drilling sealing device |
| CN106249366B (en) * | 2016-07-28 | 2019-07-26 | 中航光电科技股份有限公司 | A kind of connector and its sealing mechanism with sealing protection function |
| CN206753507U (en) * | 2017-05-08 | 2017-12-15 | 王代朋 | Mining impact drilling machine hydraulic pressure chip removal type drill steel connector |
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- 2019-01-08 CN CN201910015439.4A patent/CN109505525B/en not_active Expired - Fee Related
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Effective date of registration: 20200904 Address after: No.6 Dahu Industrial Park, Xindian Town, Xinyi City, Xuzhou City, Jiangsu Province Applicant after: Xinyi Zhongzhen Electrical Technology Co.,Ltd. Address before: 236400 Luzhai Ji 537, Luzhai Town, Linquan County, Fuyang City, Anhui Province Applicant before: Wang Kanghua |
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Granted publication date: 20200925 |