CN211648174U - Bidirectional circulating pipeline type composite slag discharging system for coring - Google Patents
Bidirectional circulating pipeline type composite slag discharging system for coring Download PDFInfo
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- CN211648174U CN211648174U CN202020258892.6U CN202020258892U CN211648174U CN 211648174 U CN211648174 U CN 211648174U CN 202020258892 U CN202020258892 U CN 202020258892U CN 211648174 U CN211648174 U CN 211648174U
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- 239000002893 slag Substances 0.000 title claims abstract description 98
- 238000007599 discharging Methods 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 title claims description 13
- 230000002457 bidirectional effect Effects 0.000 title claims description 6
- 239000011435 rock Substances 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 239000013049 sediment Substances 0.000 claims abstract description 8
- 238000010079 rubber tapping Methods 0.000 claims description 28
- 230000003993 interaction Effects 0.000 claims description 6
- 230000005641 tunneling Effects 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
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- 230000008859 change Effects 0.000 description 1
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- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model provides a compound slag discharging system of two-way circulation pipeline formula for getting core, including outer tube and the mobile pneumatic down-the-hole hammer that sets up in the outer tube of positive circulation, the pneumatic down-the-hole hammer of positive circulation includes end-to-end connection's down-the-hole hammer body and drilling rod and sets up the passageway of getting core in down-the-hole hammer body and drilling rod, be equipped with slag discharging channel between down-the-hole hammer body and outer tube, the ring is equipped with sealing device between drilling rod and outer tube, the airtight cavity that is located between sealing device and slag discharging channel is the mutual window of positive and negative circulation, the mutual window of positive and negative circulation intercommunication slag discharging channel, the reverse circulation slag discharging channel passes sealing device and communicates with the slag notch. The utility model discloses the pneumatic down-the-hole hammer of drive positive cycle is done the merit to the rock after, and waste gas carries the rock sediment to carry to the mutual window of positive and negative circulation and discharge through the reverse circulation passageway of slagging tap through slag discharge passage. The utility model discloses guaranteed to take out the completeness and the mouth of pipe cleanness of core.
Description
Technical Field
The utility model belongs to the technical field of the rock stratum tunnelling construction, in particular, relate to a compound slag discharging system of two-way circulation pipeline formula for getting the core, its purpose utilizes positive circulation down-the-hole hammer to realize the reverse circulation operation of slagging tap.
Background
In the tunneling construction process, in order to avoid immeasurable loss of the whole project caused by sudden large-area water inrush or fractured zone strata, a certain amount of rock cores are usually drilled by using special coring equipment before operation. Through the analysis and research of the rock core, geological exploration in a certain range around the tunnel can be realized, and then the properties and the change rules of rock strata around the tunnel are known, so that the tunneling operation of the tunnel is guided.
At present, the pneumatic down-the-hole hammer is widely applied to the hole forming process of rock stratum coring equipment by virtue of the advantages of high tunneling speed, good hole forming quality, high construction efficiency and the like. The working principle of the pneumatic down-the-hole hammer is that broken rock fragments are blown out of a hole for construction through residual air of high-pressure air. According to different air inlet and slag discharge modes, the conventional pneumatic down-the-hole hammer is mainly divided into a positive circulation down-the-hole hammer and a reverse circulation down-the-hole hammer; wherein, the power air source of the positive-cycle pneumatic down-the-hole hammer enters from the central position of the down-the-hole hammer and drives the down-the-hole hammer to do work, a core taking device is used for taking out a complete core, and broken rock slag is discharged along with the air from an annular cavity between the down-the-hole hammer and a hole wall; on the contrary, a power air source of the reverse circulation pneumatic down-the-hole hammer enters the down-the-hole hammer from an annular cavity between the down-the-hole hammer and the hole wall and drives the down-the-hole hammer to do work, and the crushed rock slag mixed core is discharged from a central channel of the down-the-hole hammer together.
Considering the structural design and the actual construction effect of the product, the large-diameter pneumatic down-the-hole hammer on the market at present is basically a positive circulation type structure and is suitable for the operation requirement of large aperture. But because the slag notch of positive circulating structure is the annular and distributes, and upward return rate is high in the pore in addition, and the detritus spouts to slag notch all around, on the one hand, neither is convenient for collect the analysis, causes environmental pollution easily again, and on the other hand, the sample order of returning is mixed and disorderly, can't realize the effective analysis to the target stratum. In contrast, the slag hole of the reverse circulation structure is centralized, so that the pollution of the pipe orifice can be reduced to a certain extent, and the drilled core is broken under the action of huge impact force and is sequentially discharged according to the hole depth sequence, so that the construction operation and analysis are facilitated; however, this coring method mixes the core and the rock slag together, and the core is susceptible to the rock slag during transportation, reducing the integrity of the core when it is removed.
Chinese patent ZLCN104832082B discloses a pneumatic down-the-hole hammer reverse circulation slag tapping construction process, adopts a slurry pouring wall protection method to replace a wall protection sleeve, simultaneously utilizes the pressure generated during slurry pouring to carry rock slag to be discharged from a slag discharge pipe, and in order to ensure smooth backflow of slurry, the patent also arranges a vent pipe in the slag discharge pipe, and achieves the purpose of reducing the pressure intensity of a slurry backflow end by injecting air into a slurry mixture and continuously generating bubbling. The patent is matched with mud perfusion pressure and gas lift suction to realize a slag discharging process for discharging rock slag carried by mud. However, the patent adopts the slurry, so that more requirements are provided for the structural design of the device, including the addition of a water faucet, a gas lift air supply pipeline, a slurry tank, a slurry-rock-slag separation device and the like, and the cleaning workload of the pneumatic down-the-hole hammer and the surrounding operating environment is greatly increased; in addition, the patent cannot solve the problem that the integrity of the rock core is reduced due to the mixed conveying of the rock slag and the rock core, on the contrary, the taken out rock core is completely wrapped by the slurry and cannot be marked at once, and the arrangement sequence of the rock core cannot be ensured after a series of slurry-slag separation operations.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure just can realize that the mouth of pipe pollutes few, the high slag discharging system of core integrity to solve the problem that proposes in the background art.
In order to realize the above object, the utility model provides a compound slag discharging system of two-way circulation pipeline formula for getting core, including outer tube and mobile set up in positive circulation pneumatic down-the-hole hammer in the outer tube, positive circulation pneumatic down-the-hole hammer under the power supply drive rotatory and tup one end for the outer tube stretches out to the tunnelling direction to the realization is to the drilling operation of stratum.
Be equipped with the coring passageway that is used for carrying the core in the pneumatic down-the-hole hammer of positive circulation be equipped with between pneumatic down-the-hole hammer of positive circulation and the outer tube and arrange slag channel, sealing device and reverse circulation and slag channel, arrange slag channel intercommunication tup operation district and be used for carrying the rock sediment, sealing device hoop sets up and is used for realizing the radial seal between pneumatic down-the-hole hammer of positive circulation and the outer tube, and then goes out the slag with positive circulation conversion and back circulation and slag, the one end intercommunication slag notch of reverse circulation slag channel and the other end passes sealing device intercommunication slag channel.
In a specific embodiment, the positive-circulation pneumatic down-the-hole hammer comprises a down-the-hole hammer body and a drill rod which are connected end to end, the slag discharge channel is arranged between the down-the-hole hammer body and the outer sleeve, and the sealing device is arranged in the slag discharge channel and is positioned at one end far away from the hammer head.
In another kind of utensil implementation scheme, pneumatic down-the-hole hammer of positive cycle includes end-to-end connection's down-the-hole hammer body and drilling rod, slag discharge channel sets up between down-the-hole hammer body and outer tube, sealing device sets up between drilling rod and outer tube, is located sealing device and the airtight cavity between the slag discharge channel are positive and negative circulation mutual window, positive and negative circulation mutual window intercommunication slag discharge channel and reverse circulation slag discharge channel.
Preferably, the sealing means comprises a lip seal, a rectangular seal and a ball and socket seal. Further preferably, the sealing device comprises three polyurethane lip-shaped sealing rings, one polyurethane rectangular sealing ring and two spherical hinge sealing elements.
Preferably, the slag tapping system further comprises a negative pressure generating device arranged at the position of the slag tapping hole or communicated with the reverse circulation slag tapping channel.
Preferably, the outer sleeve, the down-the-hole hammer body, the drill rod and the coring channel are all coaxially arranged.
Preferably, the slag discharge channel is an annular cavity formed between the down-the-hole hammer body and the outer sleeve.
Preferably, the reverse circulation slag discharging channel is at least one pipeline which is arranged in the same direction as the coring channel; the pipelines are evenly distributed around the drill rod at intervals.
The utility model provides a technical scheme has following beneficial effect at least:
1. the utility model discloses a slag discharging system is in the same place positive circulation pneumatic down-the-hole hammer and the reverse circulation passageway link of slagging tap through setting up the interactive window of positive and negative circulation, has not only realized adjusting well, taking into account of each advantage in the reverse circulation construction technology, still will get the core passageway and separately independent setting with the passageway of slagging tap through creatively, avoids the core to receive the rock sediment influence in the transportation to improve the complete degree of taking out the core.
2. The slag discharging system of the utility model realizes the full utilization of the residual energy after the power air source does work, discharges the rock slag according to the path sequence of the positive circulation slag discharging channel, the positive and negative circulation interaction window and the reverse circulation slag discharging channel through the pneumatic transmission (the working air pressure is less than or equal to 20bar and less than or equal to 30bar), avoids the problems of rock debris splashing and serious pollution of the pipe orifice at the slag discharging port, and simultaneously ensures that the taken rock cores are sequentially arranged; still ensure rock sediment in time to discharge through setting up radial sealing device, avoid causing the damage to equipment inner structure, and sealing device's unique structural design can bear great pressure, long service life.
3. The utility model discloses a slag tapping system has simplified equipment structure and input cost owing to need not to use mud, has reduced the clean work load to pneumatic down-the-hole hammer and surrounding operation environment, has avoided the pollution that mud itself produced in mouth of pipe department moreover.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts, wherein:
FIG. 1 is a schematic axial structure diagram of a slag tapping system in embodiment 1 of the present invention;
in the figure: the device comprises an outer sleeve 1, a positive-circulation pneumatic down-the-hole hammer 2, a down-the-hole hammer body 21, a drill rod 22, a coring channel 3, a slag discharge channel 4, a sealing device 5, a reverse-circulation slag discharge channel 6 and a positive-reverse-circulation interaction window 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1:
referring to fig. 1, a bidirectional circulation pipeline type composite slag tapping system for coring comprises an outer sleeve 1 and a positive circulation pneumatic down-the-hole hammer 2 movably arranged in the outer sleeve 1, wherein the positive circulation pneumatic down-the-hole hammer 2 comprises a down-the-hole hammer body 21 and a drill rod 22 which are connected end to end, an air supply pipeline is arranged in the down-the-hole hammer body 21 and the drill rod 22, one end of the air supply pipeline is connected with an external power air source, and the other end of the air supply pipeline is communicated with air inlet holes distributed on the down-the-hole hammer body 22; the down-the-hole hammer body 21 rotates under the driving of a power source, and one end of the hammer head extends out relative to the outer sleeve 1 in the tunneling direction, so that the rock stratum is drilled.
The down-the-hole hammer body 21 and the drill rod 22 are all provided with a core taking channel 3 for conveying a rock core, and the outer sleeve 1, the down-the-hole hammer body 21, the drill rod 22 and the core taking channel 3 are coaxially arranged.
Be equipped with between down-the-hole hammer body 21 and the outer tube 1 and arrange sediment passageway 4 be equipped with sealing device 5 and reverse circulation between drilling rod 22 and the outer tube 1 and slag discharging passageway 6, sealing device 5 hoop sets up and is used for realizing the radial seal between drilling rod 22 and the outer tube 1 inner wall, is located sealed cavity between 5 and slag discharging passageway 4 is the mutual window 7 of positive and negative circulation, the one end intercommunication slag notch of reverse circulation slag discharging passageway 6 and the other end pass sealing device 5 and communicate with the mutual window 7 of positive and negative circulation, slag discharging passageway 4's one end intercommunication tup operation district and the mutual window 7 of other end intercommunication positive and negative circulation can be converted positive circulation formula slag tapping into reverse circulation through the mutual window 7 of positive and negative circulation.
The sealing device 5 comprises two spherical hinge seals 1, three polyurethane lip seals 2 and a polyurethane rectangular sealing ring 3. The structural design of the sealing device can meet the requirements of construction operation, and when rock slag is ensured to be discharged from the reverse circulation slag discharging channel 6, the operation safety is ensured, and the service life of equipment is prolonged.
In the present embodiment, the slag discharge channel 4 is embodied as an annular cavity formed between the down-the-hole hammer body 21 and the outer sleeve 1. The reverse circulation slag discharging channel 6 is a pipeline which is axially arranged in parallel with the axial direction of the coring channel 3; in order to increase the tapping speed, the number of reverse circulation tapping channels 6 can also be increased, in particular a plurality of said pipes being evenly spaced circumferentially around said drill rod 22.
In this embodiment, the tapping system further comprises a negative pressure generating device arranged at the tapping hole location or in communication with the reverse circulation tapping channel 6.
The deslagging process of the bidirectional circulating pipeline type composite deslagging system is as follows:
1) assembling all parts of the bidirectional circulating pipeline type composite slag discharging system and connecting the parts with a power source;
2) preparing before operation, adjusting the drill rod 22 to enable the hammer head of the down-the-hole hammer body 21 to be placed in an operation area of a rock stratum or to be in contact with an operation surface of the rock stratum;
3) starting drilling operation, starting a power source, enabling a power gas source to enter the down-the-hole hammer body 21 through an air supply pipeline and drive the hammer head to apply work to the rock, and enabling the rock to be crushed into a rock core and rock slag;
4) the rock core is conveyed to the outside through the coring channel 3, the waste gas after the power air source drives the hammer head to do work is conveyed to the positive and negative circulation interaction window 7 through the slag discharge channel 4, the slag discharge is in a positive circulation form at the moment, the rock slag accumulated in the positive and negative circulation interaction window 7 enters the reverse circulation slag discharge channel 6 and is discharged through the slag discharge hole under the blocking action of the sealing device 5, and the slag discharge is in a reverse circulation form at the moment;
5) with the continuous increase of the drilling depth, the outer sleeve 1 continuously follows the construction along the tunneling direction of the positive-circulation pneumatic down-the-hole hammer 2, and further the wall protection in the hole is realized;
6) and repeating the steps until the operation is finished.
It should be noted that: in order to ensure smooth slag discharge, a power gas source used in the slag discharge process is required to work at a pressure not lower than 20 bar; particularly, the utility model provides a slag tapping system is when being used for horizontal drilling to get the core operation effect especially good.
The above description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Any improvement or equivalent replacement made by utilizing the contents of the specification and the drawings of the present invention can be directly or indirectly applied to other related technical fields within the spirit and principle of the present invention, and shall be included in the scope of the present invention.
Claims (8)
1. The bidirectional circulation pipeline type composite slag discharging system for coring is characterized by comprising an outer sleeve (1) and a positive circulation pneumatic down-the-hole hammer (2) movably arranged in the outer sleeve (1), wherein the positive circulation pneumatic down-the-hole hammer (2) is driven by a power source to rotate, and one end of the hammer head extends out relative to the outer sleeve (1) in the tunneling direction so as to realize drilling operation on a rock stratum;
be equipped with in pneumatic down-the-hole hammer of positive circulation (2) and get core passageway (3) that is used for carrying the rock core be equipped with between pneumatic down-the-hole hammer of positive circulation (2) and outer tube (1) and arrange sediment passageway (4), sealing device (5) and reverse circulation and slag channel (6) of slagging tap, it communicates the tup operation area and is used for carrying the rock sediment to arrange sediment passageway (4), sealing device (5) hoop sets up and is used for realizing the radial seal between pneumatic down-the-hole hammer of positive circulation (2) and outer tube (1), and then will just circulate and slag tap and convert reverse circulation formula to and slag tap, the one end intercommunication slag notch of reverse circulation slag channel (6) and the other end pass sealing device (5) intercommunication slag channel (4).
2. The two-way circulation pipe type composite slag tapping system according to claim 1, wherein the positive-circulation pneumatic down-the-hole hammer (2) comprises a down-the-hole hammer body (21) and a drill pipe (22) which are connected end to end, the slag discharge channel (4) is arranged between the down-the-hole hammer body (21) and the outer sleeve (1), and the sealing device (5) is arranged in the slag discharge channel (4) and is positioned at one end far away from the hammer head.
3. The two-way circulation pipeline type composite slag tapping system according to claim 1, wherein the positive-circulation pneumatic down-the-hole hammer (2) comprises a down-the-hole hammer body (21) and a drill rod (22) which are connected end to end, the slag tapping channel (4) is arranged between the down-the-hole hammer body (21) and the outer sleeve (1), the sealing device (5) is arranged between the drill rod (22) and the outer sleeve (1), a closed cavity between the sealing device (5) and the slag tapping channel (4) is a positive-negative circulation interaction window (7), and the positive-negative circulation interaction window (7) is communicated with the slag tapping channel (4) and the reverse circulation slag tapping channel (6).
4. A two-way circulating ducted composite tapping system according to any of claims 1-3, wherein said sealing means (5) comprises lip seals, rectangular seals and ball-and-socket seals.
5. The two-way circulation pipe type composite slag tapping system according to claim 4, further comprising a negative pressure generating device disposed at the position of the slag tap hole or communicated with the reverse circulation slag tapping channel (6).
6. The two-way circulation ducted composite tapping system according to claim 5, wherein the outer casing (1), down-the-hole hammer body (21), drill stem (22) and coring channel (3) are all coaxially arranged.
7. The two-way circulation ducted composite tapping system according to claim 6, wherein the tapping channel (4) is embodied as an annular cavity formed between the down-the-hole hammer body (21) and the outer sleeve (1).
8. The two-way circulation ducted composite tapping system according to claim 6, wherein the reverse circulation tapping channel (6) is embodied as at least one pipe disposed in the same direction as the coring channel (3); a plurality of said pipes are circumferentially distributed at regular intervals around said drill pipe (22).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020258892.6U CN211648174U (en) | 2020-03-05 | 2020-03-05 | Bidirectional circulating pipeline type composite slag discharging system for coring |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020258892.6U CN211648174U (en) | 2020-03-05 | 2020-03-05 | Bidirectional circulating pipeline type composite slag discharging system for coring |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431547A (en) * | 2020-12-02 | 2021-03-02 | 中国地质科学院勘探技术研究所 | Cross joint and down-the-hole drilling device |
| CN112943137A (en) * | 2021-02-20 | 2021-06-11 | 中国铁建重工集团股份有限公司 | Geological detection system for horizontal drilling machine |
| CN115234186A (en) * | 2022-08-12 | 2022-10-25 | 中国铁建重工集团股份有限公司 | Combined core drilling machine and working method thereof |
-
2020
- 2020-03-05 CN CN202020258892.6U patent/CN211648174U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431547A (en) * | 2020-12-02 | 2021-03-02 | 中国地质科学院勘探技术研究所 | Cross joint and down-the-hole drilling device |
| CN112943137A (en) * | 2021-02-20 | 2021-06-11 | 中国铁建重工集团股份有限公司 | Geological detection system for horizontal drilling machine |
| CN112943137B (en) * | 2021-02-20 | 2022-11-25 | 中国铁建重工集团股份有限公司 | Geological detection system for horizontal drilling machine |
| CN115234186A (en) * | 2022-08-12 | 2022-10-25 | 中国铁建重工集团股份有限公司 | Combined core drilling machine and working method thereof |
| CN115234186B (en) * | 2022-08-12 | 2024-02-27 | 中国铁建重工集团股份有限公司 | Combined coring drilling machine and working method thereof |
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