CN106948752A - Joint and assembly method after down-the-hole air hammer is anti-stifled - Google Patents

Joint and assembly method after down-the-hole air hammer is anti-stifled Download PDF

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Publication number
CN106948752A
CN106948752A CN201710228629.5A CN201710228629A CN106948752A CN 106948752 A CN106948752 A CN 106948752A CN 201710228629 A CN201710228629 A CN 201710228629A CN 106948752 A CN106948752 A CN 106948752A
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CN
China
Prior art keywords
joint
valve seat
rear joint
stifled
air hammer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710228629.5A
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Chinese (zh)
Inventor
龚康强
孙超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YICHANG WOOKE SCIENCE AND TECHNOLOGY Co Ltd
Original Assignee
YICHANG WOOKE SCIENCE AND TECHNOLOGY Co Ltd
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Publication date
Application filed by YICHANG WOOKE SCIENCE AND TECHNOLOGY Co Ltd filed Critical YICHANG WOOKE SCIENCE AND TECHNOLOGY Co Ltd
Priority to CN201710228629.5A priority Critical patent/CN106948752A/en
Publication of CN106948752A publication Critical patent/CN106948752A/en
Pending legal-status Critical Current

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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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/003—Bearing, sealing, lubricating details

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

Joint and assembly method after instead being blocked up the present invention relates to down-the-hole air hammer, it includes rear joint, the rear joint is connected by screw thread pair with impactor cylinder body, and the center of the rear joint, which is machined with inside annular housing, the annular housing, is machined with step and locating slot in rear joint cavity；The annular housing mounted inside has non-return valve, and the centre bore of the non-return valve is provided with spring, and non-return valve and spring all coordinate inside valve seat Large central aperture；The valve seat is fixed on inside annular housing by the positioning element encapsulation inside locating slot；The end face that the positioning element and valve seat are engaged is provided with pretension part.Hereafter joint design ensure that rear joint will not also cause the problem of non-return valve is with rear joint seal failure in counter rotation.

Description

Joint and assembly method after down-the-hole air hammer is anti-stifled
Technical field
The present invention relates to the anti-stifled rear joint of a kind of pneumatic impact equipment, particularly down-the-hole air hammer and assembly method.
Background technology
As down-the-hole air hammer is in the development of down-the-hole drilling technical field, its application field also in continuous extension and is expanded, Various complicated operating modes must not be unsatisfactory for by allowing for down-the-hole air hammer.
Wherein, in well and geothermal engineering construction are carried out using down-the-hole air hammer, it is present, and single drilling depth is big, hole Bottom is with operating modes such as a large amount of mud mixtures so that impactor machine halt trouble takes place frequently.Its subject matter is：Muddy water goes out from drill bit Stomata, which pours in down a chimney to block into the induction shutdown of impactor inside or drill bit venthole, to be caused to shut down.
No matter which kind of situation is caused is shut down, and its basic reason is that：Because drilling depth is excessive, and many masons Air-tightness can not meet use condition inside condition, conventional impactor, or due to its internal air-tightness element gas in use Close property is deteriorated and causes frequent shutdown.
It is well known that non-return valve is the check valve of tip side setting after impactor, its main function：First, prevent from stopping the supple of gas or steam Moment back flow of gas causes equipment damage into air compressor machine；Second, stop moment non-return valve to be upspring and closed gases at high pressure in punching Hit inside device, be at closed closed state, impactor inner chamber air pressure is higher than external pressure, to prevent that muddy water from pouring in down a chimney entrance Impactor.Thus, the sealing reliability of check valve module is the main cause for causing shutdown.
At present, conventional down-the-hole air hammer structure is as shown in figure 1, non-return valve 2 is placed in distribution together with after the assembling of spring 3 The centre bore of bar 4, another end cone face of non-return valve 2 and the rear inner conical surface palette of joint 1；Afterwards joint 1, non-return valve 2, spring 3, match somebody with somebody Gas bar 4 is single parts, and loads one by one in impactor, and the step a of wherein distribution bar 4 is supported on the step b of inner casing 5 On, rear joint 1 is connected with outer tube 6 by screw thread, with the precession of screw thread during assembling, and the step c of rear joint 1, which is compressed, to be matched somebody with somebody The step a of gas bar 4 so that inside compresses and is integrated.There is following drawback in this structure：In impactor bottom hole drilling process often Generation bit freezing phenomenon, usual solution is exactly to drive impactor to invert by rig.Because rear joint 1 and outer tube 6 are spiral shells Line pair connection, so thread looseness can be frequently resulted in, causes inner body to compress and is integrated, ultimately cause non-return valve 2 The conical surface of the conical surface and rear joint 1 can not be brought into close contact, and then influence its air-tightness, cause frequent shutdown.
The content of the invention
The technical problems to be solved by the invention are to provide the anti-stifled rear joint of down-the-hole air hammer and assembly method, hereafter joint Structure ensure that rear joint will not also cause the problem of non-return valve is with rear joint seal failure in counter rotation.
In order to realize above-mentioned technical characteristic, the object of the present invention is achieved like this：Joint after down-the-hole air hammer is anti-stifled, It includes rear joint, and the rear joint is connected by screw thread pair with impactor cylinder body, and the center of the rear joint is machined with annular Step and locating slot in rear joint cavity are machined with inside cavity, the annular housing；The annular housing mounted inside has check Valve, the centre bore of the non-return valve is provided with spring, and non-return valve and spring all coordinate inside valve seat Large central aperture；It is described Valve seat is fixed on inside annular housing by the positioning element encapsulation inside locating slot；Positioning element and the valve seat phase The end face of cooperation is provided with pretension part.
Tightening cushion is installed between the pretension seal member and positioning element.
Multiple uniform gas passages excessively are machined with the valve seat, is machined with and is engaged with pretension seal member on valve seat Positioning step, the gas distribution section of multiple seal grooves is machined with its end, the gas distribution section is engaged with the centre bore of distribution bar.
The material that the pretension part use can compress pretension is made.
The pretension part can use O-ring seals or rubber blanket.
The positioning element uses circlip or elastic spring.
The rear joint is connected transmitting torque by screw thread with drilling rod.
The non-return valve is check valve.
The assembly method of joint after down-the-hole air hammer is anti-stifled, it comprises the following steps：
The first step：Spring and non-return valve are encased in the Large central aperture of valve seat one by one；
Second step：Just non-return valve, spring and valve seat are assemblied in inside the annular housing of rear joint in the lump, make the upper surface of valve seat F coordinates with the step end face e of step in rear joint cavity to be positioned；
3rd step：Coordinate where positioning step in valve seat at end face j and pretension part is installed, install pre- in the lower floor of pretension part Tight pad；
4th step：Positioning element is installed on inside the locating slot in rear joint, and compresses tightening cushion so that valve seat reaches pre- Tightening position purpose；
5th step：On the outer tube that the rear joint entirely assembled is arranged on to impactor, whole impactor is finally completed Assembling work.
The method have the advantages that：
1st, by by non-return valve and valve seat encapsulation installed in the inside of rear joint, it is ensured that rear structure in counter rotation, Because of its loosening non-return valve and rear joint will not be caused to coordinate the situation of conical surface seal failure, and then improve the stabilization of sealing Property.
The 2nd, valve seat can be encapsulated in the inside of rear joint by pretension part, tightening cushion and positioning element, valve is prevented Seat loosens and causes non-return valve to be unclamped with rear joint.
3rd, using said structure, down-the-hole air hammer is effectively solved in well and geothermal engineering construction is carried out, impact The problem of device frequent shutdown, improve non-return valve working seal reliability.
4th, the annular housing inner components of rear joint can be carried out effectively positioning and sealing by using positioning element Dress, and positioning element uses circlip or elastic spring, facilitates it to assemble.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is existing down-the-hole air hammer structure chart of the invention.
Fig. 2 is integral installation distribution structure schematic diagram of the invention
Fig. 3 is rear joint design schematic diagram of the invention.
Fig. 4 is valve seat construction schematic diagram of the invention.
Fig. 5 is A partial structural diagrams in Fig. 2 of the present invention.
Fig. 6 is B partial structural diagrams in Fig. 2 of the present invention.
In figure：Joint 1, non-return valve 2, spring 3, valve seat 4, pretension part 6, tightening cushion 7, positioning element 8, seal groove afterwards 9；
Step 102, locating slot 103 in annular housing 101, rear joint cavity；
Gas passage 401, positioning step 402, gas distribution section 403.
Embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
Embodiment 1：
Referring to Fig. 2-6, joint after down-the-hole air hammer is anti-stifled, it includes rear joint 1, and the rear joint 1 passes through screw thread pair and impact Device cylinder body is connected, and the center of the rear joint 1, which is machined with inside annular housing 101, the annular housing 101, is machined with rear joint Step 102 and locating slot 103 in chamber；The mounted inside of annular housing 101 has non-return valve 2, the centre bore peace of the non-return valve 2 Equipped with spring 3, non-return valve 2 and spring 3 all coordinate inside the Large central aperture of valve seat 4；The valve seat 4 is by installed in positioning The encapsulation of positioning element 8 inside groove 103 is fixed on inside annular housing 101；The end that the positioning element 8 and valve seat 4 are engaged Face is provided with pretension part 6.
Wherein, in assembling process, spring 3 and non-return valve 2 are encased in the Large central aperture of valve seat 4 one by one first, with Non-return valve 2, spring 3 and valve seat 4 are assemblied in inside the annular housing 101 of rear joint 1 in the lump afterwards, make the upper surface f of valve seat 4 with The step end face e of step 102 coordinates and coordinate at positioning, the place end face j of positioning step 402 of valve seat 4 installation in advance in joint cavity afterwards Tight part 6, pretension part 6 is encapsulated in inside annular housing 101 by tightening cushion 7 and positioning element 8, and positioning element 8 is installed Inside the locating slot 103 in rear joint 1, finally make it that valve seat reaches that pretension positions purpose.
Further, tightening cushion 7 is installed between the pretension seal member 6 and positioning element 8.
Further, multiple uniform gas passages 401 excessively are machined with the valve seat 4, are machined with valve seat 4 and pretension The positioning step 402 that seal member 6 is engaged, the gas distribution section 403 of multiple seal grooves 9, the gas distribution section are machined with its end 403 are engaged with the centre bore of distribution bar 10.Sealing ring is installed on seal groove 9, total is in the course of work, distribution The section centre bore of 403 distribution bar 10 is engaged.
Further, the material that the use of pretension part 6 can compress pretension is made.And then valve seat 4 can be played The purpose of pretension.
Further, the pretension part 6 uses O-ring seals or rubber blanket.
Further, the positioning element 8 uses circlip or elastic spring.
Further, the rear joint 1 is connected transmitting torque by screw thread with drilling rod.
Further, the non-return valve 2 is check valve.
Sealing unit A, pretension and positioning unit B are its important composition part in joint 1 after such as Fig. 5,6, the structure.Fig. 2 Middle sealing unit A is non-return valve 2 and conical surface seal in rear joint 1；Pretension part 6 can be O shapes in preload unit and positioning unit B Circle, rubber blanket etc. can compress pretension product, and positioning element 8 can reach positioning purpose for circlip, elastic spring etc. .Wherein valve seat crosses gas passage provided with multiple, sees in Fig. 4 that it is multiple ducts to cross gas passage, the structure is not limited to duct Form.
Embodiment 2：
The assembly method of joint after down-the-hole air hammer is anti-stifled, it comprises the following steps：
The first step：Spring 3 and non-return valve 2 are encased in the Large central aperture of valve seat 4 one by one；
Second step：Just non-return valve 2, spring 3 and valve seat 4 are assemblied in inside the annular housing 101 of rear joint 1 in the lump, make valve seat 4 Upper surface f and rear joint cavity in the step end face e of step 102 coordinate and position；
3rd step：Coordinate at the place end face j of positioning step 402 of valve seat 4 and pretension part 6 is installed, in the lower floor of pretension part 6 Tightening cushion 7 is installed；
4th step：Positioning element 8 is installed on inside the locating slot 103 in rear joint 1, and compresses tightening cushion 7 so that valve seat Reach that pretension positions purpose；
5th step：On the outer tube that the rear joint 1 entirely assembled is arranged on to impactor, whole impactor is finally completed Assembling work.
The present invention operation principle be：
For current existing rear joint, non-return valve and distribution bar fault of construction, the spring 3 of non-return valve 2 and valve seat 4 are encapsulated into peace Mounted in the inside of rear joint 1, it is ensured that rear structure 1 will not cause the He of non-return valve 2 in counter rotation because of its loosening Joint 1 coordinates the problem of conical surface seal fails afterwards, and then improves the stability of sealing.Down-the-hole air hammer is avoided in operation The problem of occurring frequent shutdown in journey.
By above-mentioned description, those skilled in the art completely can be in the model without departing from this invention technological thought In enclosing, various changes and amendments are carried out all within protection scope of the present invention.The unaccomplished matter of the present invention, belongs to ability The common knowledge of field technique personnel.

Claims (9)

  1. Joint after 1. down-the-hole air hammer is anti-stifled, it includes rear joint（1）, the rear joint（1）Pass through screw thread pair and impactor cylinder Body phase connects, it is characterised in that：The rear joint（1）Center be machined with annular housing（101）, the annular housing（101）It is interior Portion is machined with step in rear joint cavity（102）And locating slot（103）；The annular housing（101）Mounted inside has non-return valve （2）, the non-return valve（2）Centre bore spring is installed（3）, non-return valve（2）And spring（3）All coordinate and be arranged on valve seat（4） Inside Large central aperture；The valve seat（4）By installed in locating slot（103）Internal positioning element（8）Encapsulation is fixed on annular Cavity（101）It is internal；The positioning element（8）And valve seat（4）The end face being engaged is provided with pretension part（6）.
  2. Joint after 2. down-the-hole air hammer according to claim 1 is anti-stifled, it is characterised in that：The pretension seal member（6） And positioning element（8）Between tightening cushion is installed（7）.
  3. Joint after 3. down-the-hole air hammer according to claim 1 is anti-stifled, it is characterised in that：The valve seat（4）On be machined with Multiple uniform gas passages excessively（401）, in valve seat（4）On be machined with and pretension seal member（6）The positioning step being engaged （402）, multiple seal grooves are machined with its end（9）Gas distribution section（403）, the gas distribution section（403）With distribution bar（10）'s Centre bore is engaged.
  4. Joint after 4. down-the-hole air hammer according to claim 1 is anti-stifled, it is characterised in that：The pretension part（6）Using The material that pretension can be compressed is made.
  5. 5. the anti-stifled rear joint of down-the-hole air hammer according to claim 1 or 4, it is characterised in that：The pretension part（6）Energy Enough use O-ring seals or rubber blanket.
  6. Joint after 6. down-the-hole air hammer according to claim 1 is anti-stifled, it is characterised in that：The positioning element（8）Using Circlip or elastic spring.
  7. Joint after 7. down-the-hole air hammer according to claim 1 is anti-stifled, it is characterised in that：The rear joint（1）Pass through spiral shell Line is connected transmitting torque with drilling rod.
  8. Joint after 8. down-the-hole air hammer according to claim 1 is anti-stifled, it is characterised in that：The non-return valve（2）To be unidirectional Valve.
  9. The assembly method of joint after 9. claim 1-8 any one down-the-hole air hammer is anti-stifled, it is characterised in that：It includes following Step：
    The first step：By spring（3）And non-return valve（2）Valve seat is encased in one by one（4）Large central aperture in；
    Second step：Just non-return valve（2）, spring（3）And valve seat（4）Rear joint is assemblied in the lump（1）Annular housing（101）It is interior Portion, makes valve seat（4）Upper surface f and rear joint cavity in step（102）Step end face e coordinate positioning；
    3rd step：In valve seat（4）Positioning step（402）Coordinate at the end face j of place and pretension part is installed（6）, in pretension part （6）Lower floor install tightening cushion（7）；
    4th step：By positioning element（8）It is installed on rear joint（1）In locating slot（103）Inside, and compress tightening cushion（7）, So that valve seat reaches that pretension positions purpose；
    5th step：By the rear joint entirely assembled（1）On the outer tube of impactor, whole impact is finally completed The assembling work of device.
CN201710228629.5A 2017-04-10 2017-04-10 Joint and assembly method after down-the-hole air hammer is anti-stifled Pending CN106948752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710228629.5A CN106948752A (en) 2017-04-10 2017-04-10 Joint and assembly method after down-the-hole air hammer is anti-stifled

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710228629.5A CN106948752A (en) 2017-04-10 2017-04-10 Joint and assembly method after down-the-hole air hammer is anti-stifled

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CN106948752A true CN106948752A (en) 2017-07-14

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2212655Y (en) * 1994-09-05 1995-11-15 王忠发 Pneumatic impact mechanism
EP1076754A1 (en) * 1998-05-04 2001-02-21 Permon S.R.O. Pneumatic submersible boring tool
CN201851034U (en) * 2010-11-18 2011-06-01 长沙天和钻具机械有限公司 Backward flowing prevention device
CN202249753U (en) * 2011-09-01 2012-05-30 中国石油化工集团公司 Down hole hammer drill bit shank one-way valve
CN203321312U (en) * 2013-03-09 2013-12-04 长沙创远高新机械有限责任公司 Gear down-the-hole mixing drilling tool and gear down-the-hole drilling machine comprising gear down-the-hole mixing drilling tool
CN203547523U (en) * 2013-10-29 2014-04-16 长沙天和钻具机械有限公司 Down-hole hammer for high-air-pressure drilling machine drilling work
CN206636500U (en) * 2017-04-10 2017-11-14 宜昌市五环钻机具有限责任公司 Down-the-hole air hammer instead blocks up rear joint

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2212655Y (en) * 1994-09-05 1995-11-15 王忠发 Pneumatic impact mechanism
EP1076754A1 (en) * 1998-05-04 2001-02-21 Permon S.R.O. Pneumatic submersible boring tool
CN201851034U (en) * 2010-11-18 2011-06-01 长沙天和钻具机械有限公司 Backward flowing prevention device
CN202249753U (en) * 2011-09-01 2012-05-30 中国石油化工集团公司 Down hole hammer drill bit shank one-way valve
CN203321312U (en) * 2013-03-09 2013-12-04 长沙创远高新机械有限责任公司 Gear down-the-hole mixing drilling tool and gear down-the-hole drilling machine comprising gear down-the-hole mixing drilling tool
CN203547523U (en) * 2013-10-29 2014-04-16 长沙天和钻具机械有限公司 Down-hole hammer for high-air-pressure drilling machine drilling work
CN206636500U (en) * 2017-04-10 2017-11-14 宜昌市五环钻机具有限责任公司 Down-the-hole air hammer instead blocks up rear joint

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Application publication date: 20170714

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