CN201650193U - Blowout prevention connection unit of long-distance horizontal borehole - Google Patents
Blowout prevention connection unit of long-distance horizontal borehole Download PDFInfo
- Publication number
- CN201650193U CN201650193U CN2009202731364U CN200920273136U CN201650193U CN 201650193 U CN201650193 U CN 201650193U CN 2009202731364 U CN2009202731364 U CN 2009202731364U CN 200920273136 U CN200920273136 U CN 200920273136U CN 201650193 U CN201650193 U CN 201650193U
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- orifice tube
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Abstract
The utility model discloses a blowout prevention connection unit of a long-distance horizontal borehole, belonging to horizontal boring apparatuses. The connection unit comprises a long-distance orifice tube installed on an underground continuous wall or lining, wherein the rear part of the long-distance orifice tube is provided with a small decompression gate valve and the tail end thereof is connected with a ball valve; and the rear part of the ball valve is connected with a water stop packing device that comprises a packing box and a packing pressed into the packing box and fixed by an expansion bolt. The small decompression gate valve releases pressure if the pressure in the hole is excessive during drilling of supply water and controls the loss amount of soil and water. The ball valve provides safe guarantee when the risk of accidentally spraying water and sand happens to the borehole. The water stop packing device ensures close combination with a drill pipe during drilling process, thus effectively avoiding loss of water and soil when drilling. The benefits are as follows: the connection unit offers more space to the construction position of a drilling machine, can effectively avoid the sway of the drill pipe in the long-distance borehole by the method of filling high quality clay in the orifice tube and is compact in structure, easy in manufacture, low in cost and simple for promotion and use.
Description
Technical field
The utility model relates to a kind of horizontal drilling equipment, is specifically related to a kind of anti-spraying connector for long-distance horizontal drilling.Mainly be applicable to and prevent the usefulness that sandblasts when the long distance of horizontal drilling is drilled in the construction of city underground tunnel portal consolidation by freezing.
Background technology
Shield construction city underground tunnel all needs the soil body at end well portal place is reinforced when starting and receive, and is used to the construction safety that guarantees shield launching and receiving when.The portal soil stabilization generally adopts agitation pile, rotary churning pile or consolidation by freezing at present.Because freeze the soil strength height, water sealing effect is good, in the relatively poor water bearing ground of geological conditions, carry out soil stabilization and generally all adopt freezing process to carry out; Municipal construction building, pipeline etc. are intensive, and often ground does not have the construction plant, adopts the horizontal frozen method to carry out soil stabilization in this case.When fetching water flat freezing hole with rig, because geological conditions is poor, the risk that can occur sprays water sandblasts causes soil erosion when serious, and surface collapse causes catastrophic failure to surface structures etc.; And the end well structure is finished during freezing hole construction, and the portal top board has hindered the construction of freezing hole, and former treating method all is that top board is removed, and treats to go after frozen construction is finished to recover again, and causes bigger waste to engineering.
Summary of the invention
In order to address the above problem, the utility model provides a kind of anti-spraying connector for long-distance horizontal drilling, can effectively overcome when the long distance of horizontal drilling is drilled in the construction to sandblast.
The utility model is realized with following technical scheme: a kind of anti-spraying connector for long-distance horizontal drilling, it is characterized in that: comprise that the length that is installed on ground-connecting-wall or the liner is apart from orifice tube, apart from the orifice tube rear portion the little gate valve of pressure release is housed long, long tail end apart from orifice tube is connected with ball valve; The ball valve rear portion connects the sealing packing unit; Described sealing packing unit comprises packing box, be pressed in the packing box and with bolt packing.
Owing to adopted technique scheme, promptly after the perforate of freezing hole construction position, orifice tube is installed, at the little gate valve of orifice tube rear portion welding pressure release, afterbody connects a ball valve; The ball valve rear portion connects the sealing packing unit again; Drilling rod creeps in anti-spraying connector for long-distance horizontal drilling during boring.Because the little gate valve of pressure release has been installed, if the hole internal pressure is too big when feedwater is crept into, can opens little gate valve and carry out pressure release, can also be by closing little gate valve conservation of soil and water amount.When the ball valve of anti-spraying connector for long-distance horizontal drilling afterbody sandblasts risk for accident appears in boring, provide safe control device.And the latter linked sealing packing unit of ball valve can guarantee to combine closely with drilling rod in the boring procedure, the soil erosion in having prevented from effectively to creep into.
Good effect of the present utility model is: anti-spraying connector for long-distance horizontal drilling makes the drilling machine construction position that bigger space arranged; Can effectively prevent the swing of drilling rod in the long distance boring by the way of in orifice tube, filling tonerde.The utility model compact conformation, manufacturing is simple, cost is low, is easy to promote the use of.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Accompanying drawing is the utility model structural representation.
Among the figure: 1, orifice tube, 2, ball valve, 3, the sealing packing unit, 3-1, packing, 3-2, packing box, 4, the little gate valve of pressure release, 5, installing hole, 6, bolt, 7, expansion bolt, 8, liner, 9, ground-connecting-wall, 10, drill bit.
The specific embodiment
As shown in drawings, anti-spraying connector for long-distance horizontal drilling comprises that the length that is installed on ground-connecting-wall 9 or the liner 8 is apart from orifice tube 1, apart from the orifice tube rear portion the little gate valve 4 of pressure release is housed long, if the hole internal pressure is too big when feedwater is crept into, can open the little gate valve 4 of pressure release and carry out pressure release, can also be by closing little gate valve 4 conservation of soil and water amounts of pressure release.Long tail end apart from orifice tube 1 is connected with ball valve 2; When boring appearance accident sandblasts risk, can close ball valve 2.Ball valve 2 rear portions connect sealing packing unit 3; Described sealing packing unit 3 comprises packing box 3-2, the packing 3-1 that is pressed among the packing box 3-2 and uses expansion bolt 7 to fix.Described ball valve 2 adopts bolt to be connected with long apart from orifice tube 1.Described sealing packing unit 3 adopts bolt to be connected with ball valve 2.
On ground-connecting-wall 9 or liner 8, reserve each hole site according to design.Locate on ground-connecting-wall or liner according to the position, hole and to open installing hole 5, at first use Tapper (join diamond bit and get core) to open installing hole, when reaching degree of depth 300mm, stop to creep into, orifice tube 1 is installed, the mounting method of orifice tube is: at first chipping is located in the aperture, good and sound four bolts 6 are then buckled sealers such as having twined flax silk or staple at the fish scale of orifice tube 1, orifice tube is packed in the installing hole, tighten fixingly with bolt 6, after tightening, load onto ball valve 2, again ball valve 2 is opened,, ground-connecting-wall is opened always and worn, at this moment from the little gate valve open interior of pressure release with Tapper, big as the water sand flow amount in the stratum, just in time shut gate.
Adjust the rig position by concrete condition, and fix, drill bit is packed in the opening arrangement, and packing 3-1 gently is pressed in the packing box 3-2, fixing with expansion bolt 7.At first adopt dry type to creep into, when creeping into difficultly not drilling depth, carry out water filling from rig and creep into, open the little gate valve 4 of pressure release simultaneously, observe water outlet, the situation of shaking out, utilize the switch of the little gate valve of pressure release to control out husky amount, guarantee ground safety, sedimentation do not occur.As occur unexpectedly when sandblasting in a large number, and in time drilling rod 10 is extracted, ball valve 2 is closed, continue again Ex post to creep into.
Boring is finished the back and has been sealed bottom the hole with plug, and concrete grammar is, utilize extension bar with on the plug to the bottom in hole, utilize left-hand thread in shackle, plug is tightened.Suppress leak test by designing requirement then.
Claims (3)
1. anti-spraying connector for long-distance horizontal drilling, it is characterized in that: comprise that the length that is installed on ground-connecting-wall or the liner is apart from orifice tube (1), apart from orifice tube (1) rear portion the little gate valve of pressure release (4) is housed long, long tail end apart from orifice tube (1) is connected with ball valve (2); Ball valve (2) rear portion connects sealing packing unit (3); Described sealing packing unit (3) comprises packing box (3-2), is pressed in the packing box and the packing (3-1) of using expansion bolt (7) to fix.
2. anti-spraying connector for long-distance horizontal drilling according to claim 1 is characterized in that: described ball valve (2) adopts bolt to be connected with long apart from orifice tube (1).
3. anti-spraying connector for long-distance horizontal drilling according to claim 1 is characterized in that: described sealing packing unit (3) adopts bolt to be connected with ball valve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202731364U CN201650193U (en) | 2009-11-28 | 2009-11-28 | Blowout prevention connection unit of long-distance horizontal borehole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202731364U CN201650193U (en) | 2009-11-28 | 2009-11-28 | Blowout prevention connection unit of long-distance horizontal borehole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201650193U true CN201650193U (en) | 2010-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202731364U Expired - Fee Related CN201650193U (en) | 2009-11-28 | 2009-11-28 | Blowout prevention connection unit of long-distance horizontal borehole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201650193U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878909A (en) * | 2020-12-24 | 2021-06-01 | 南昌轨道交通集团有限公司 | Anti-gushing method for drilling horizontal freezing hole of foundation pit |
| CN113547647A (en) * | 2021-07-06 | 2021-10-26 | 上海市基础工程集团有限公司 | High-water-pressure large-thickness reinforced concrete rapid hole forming device and method |
-
2009
- 2009-11-28 CN CN2009202731364U patent/CN201650193U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878909A (en) * | 2020-12-24 | 2021-06-01 | 南昌轨道交通集团有限公司 | Anti-gushing method for drilling horizontal freezing hole of foundation pit |
| CN113547647A (en) * | 2021-07-06 | 2021-10-26 | 上海市基础工程集团有限公司 | High-water-pressure large-thickness reinforced concrete rapid hole forming device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20111128 |