CN214303701U - Anti-blocking high-pressure rotary jet drill bit suitable for sand layer - Google Patents
Anti-blocking high-pressure rotary jet drill bit suitable for sand layer Download PDFInfo
- Publication number
- CN214303701U CN214303701U CN202120037866.5U CN202120037866U CN214303701U CN 214303701 U CN214303701 U CN 214303701U CN 202120037866 U CN202120037866 U CN 202120037866U CN 214303701 U CN214303701 U CN 214303701U
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- CN
- China
- Prior art keywords
- drill bit
- bit body
- grouting
- sand layer
- pressure rotary
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- Expired - Fee Related
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- 239000004576 sand Substances 0.000 title claims abstract description 17
- 238000007569 slipcasting Methods 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 23
- 230000000903 blocking effect Effects 0.000 description 10
- 239000002689 soil Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000011440 grout Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Abstract
The application relates to an anti-blocking high-pressure rotary jet drill bit suitable for a sand layer, which comprises a drill bit body, wherein the upper part of the drill bit body is provided with a connecting joint used for being connected with a drill rod, the lower end of the drill bit body is provided with a tip end, the drill bit body is provided with a grouting channel along the axial direction of the drill bit body, and the lower part of the drill bit body is provided with a grouting hole communicated with the grouting channel; the drilling bit comprises a drilling bit body and is characterized in that a plugging block is arranged in the grouting channel in the lower portion of the drilling bit body in a sliding mode, the outer diameter of the plugging block is the same as the inner diameter of the grouting channel, a reset spring capable of pushing the plugging block to shield a grouting hole is arranged between the plugging block and the drilling bit body, one end of the reset spring is connected with the plugging block, and the other end of the reset spring is connected with the bottom of the drilling bit body. This application has the advantage that prevents the slip casting hole jam.
Description
Technical Field
The application relates to the field of drill bits, in particular to an anti-blocking high-pressure rotary jet drill bit suitable for a sand layer.
Background
The high-pressure jet grouting pile is characterized in that a jet grouting pipe and a nozzle drill are arranged at a designed elevation at the bottom of the pile by using a drilling machine, prepared grout in advance is sprayed out from a nozzle at the edge of the grouting pipe at a high speed after obtaining huge energy through a high-pressure generating device to form a stream with highly concentrated energy, a soil body is directly damaged, a drill rod is lifted while rotating in the spraying process, so that the grout and the soil body are fully stirred and mixed, and a columnar solidification body with a certain diameter is formed in the soil, so that a foundation is reinforced.
The construction is generally divided into two working flows, namely drilling, then drilling, jetting, and then lifting and rotating. The jet grouting drill bit is a key component during jet grouting pile construction, and can drill deep into a stratum and spray slurry on the other hand. However, during the drilling process, the mud and sand in the hole easily block the grout outlet hole on the drill bit, thereby influencing the subsequent guniting to form the rotary jet grouting pile.
Disclosure of Invention
In order to improve the easy technical problem who blocks up in drill bit mud hole, this application provides a prevent stifled high pressure jet grouting drill bit suitable for sand bed.
The application provides a pair of prevent stifled high pressure jet-grouting drill bit suitable for sand bed adopts following technical scheme:
an anti-blocking high-pressure rotary jet drill bit suitable for a sand layer comprises a drill bit body, wherein the upper part of the drill bit body is provided with a connecting joint used for being connected with a drill rod, the lower end of the drill bit body is provided with a tip, the drill bit body is provided with a grouting channel along the axial direction of the drill bit body, and the lower part of the drill bit body is provided with a grouting hole communicated with the grouting channel; the drilling bit comprises a drilling bit body and is characterized in that a plugging block is arranged in the grouting channel in the lower portion of the drilling bit body in a sliding mode, the outer diameter of the plugging block is the same as the inner diameter of the grouting channel, a reset spring capable of pushing the plugging block to shield a grouting hole is arranged between the plugging block and the drilling bit body, one end of the reset spring is connected with the plugging block, and the other end of the reset spring is connected with the bottom of the drilling bit body.
Through adopting above-mentioned technical scheme, through setting up the shutoff piece in the slip casting passageway, the shutoff piece can seal the slip casting hole when drilling, avoids the slip casting hole to block up, and during the slip casting, the shutoff piece can be opened the slip casting hole under the pressure effect, carries out the slip casting.
Optionally, the inner wall of the drill bit body is provided with a limiting bulge for limiting the displacement distance of the plugging block above the grouting hole.
Through adopting above-mentioned technical scheme, spacing arch restricts the displacement of shutoff piece, avoids the shutoff piece to move out the position in thick liquid hole under reset spring's effect, causes unable shutoff.
Optionally, the mounting column is arranged below the plugging block at the bottom of the drill bit body, and the reset spring is sleeved on the mounting column.
Through adopting above-mentioned technical scheme, the erection column has spacing, stable effect to reset spring on the one hand, and on the other hand can the butt on the erection column when the shutoff piece moves down, avoids reset spring to be compressed excessively, destroys reset spring.
Optionally, the tip is removably connected to the bit body.
Through adopting above-mentioned technical scheme, be convenient for demolish the pointed end, wash the inside slip casting passageway of shutoff piece and drill bit body.
Optionally, the tip is threadedly connected to the bit body.
By adopting the technical scheme, the installation is convenient and the stability is good.
Optionally, the outer side wall of the drill body is provided with a drill blade.
By adopting the technical scheme, the drilling blade is used for damaging the surrounding soil body in the drilling process, so that slurry and the soil body can be mixed conveniently.
Optionally, the connection joint is cylindrical, the diameter of the connection joint is larger than that of the drill bit body, the connection joint is communicated with the grouting channel, and an internal thread is formed in the inner wall of the connection joint.
Through adopting above-mentioned technical scheme, be convenient for clear up the passageway of shutoff piece and shutoff piece bottom, also conveniently demolish the shutoff piece and change.
Optionally, the blocking block is sleeved with a rubber sleeve.
Through adopting above-mentioned technical scheme, increase the leakproofness, avoid the thick liquid to flow in shutoff piece below, inconvenient clearance and solidification.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the blocking block is arranged in the grouting channel, so that the blocking block can seal a grouting hole during drilling, the grouting hole is prevented from being blocked, and the blocking block can open the grouting hole under the action of pressure during grouting to perform grouting;
2. can dismantle the connection with pointed end and drill bit body, the erection column is fixed on the pointed end to be convenient for clear up the passageway of shutoff piece and shutoff piece bottom, also conveniently demolish the shutoff piece and change.
Drawings
FIG. 1 is a schematic view of a drill bit configuration.
Fig. 2 is a cross-sectional view of the drill bit.
Description of reference numerals: 1. a drill bit body; 2. connecting a joint; 3. a tip; 4. grouting holes; 5. a plugging block; 6. a return spring; 7. drilling leaves; 8. a limiting bulge; 9. and (6) mounting the column.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses prevent stifled high pressure jet grouting drill bit suitable for sand bed. Referring to fig. 1 and 2, the drill bit comprises a drill bit body 1, wherein the drill bit body 1 is cylindrical, the upper end of the drill bit body is provided with a connecting joint 2 for connecting with a drill rod, and the lower end of the drill bit body is provided with a tip 3 for facilitating drilling. The drill bit body 1 has been seted up the slip casting passageway along its axial, and the transversal personally submitting of slip casting passageway is circular, and the slip casting hole 4 with the slip casting passageway intercommunication is seted up to drill bit body 1 lower part, and the slip casting hole 4 is seted up a plurality ofly along the circumference interval of drill bit body 1. A plugging block 5 is arranged in the grouting channel in a sliding manner at the lower part of the drill bit body 1, the plugging block 5 is positioned below the grouting hole 4, the plugging block 5 is circular, and the outer diameter of the plugging block is the same as the inner diameter of the grouting channel; be equipped with between shutoff piece 5 and the drill bit body 1 and can promote the reset spring 6 that shutoff piece 5 shields slip casting hole 4, reset spring 6 one end is connected with shutoff piece 5, and the other end is connected with drill bit body 1 bottom. When the drilling hole is in a drilling state, the reset spring 6 pushes the blocking block 5 to move upwards, the blocking block 5 shields the grouting hole 4, the grouting hole 4 is blocked, and silt is prevented from blocking the grouting hole 4; in the grouting state, under the grouting pressure, the return spring 6 is compressed, the plugging block 5 moves downwards, the grouting hole 4 is opened, and the grout is sprayed out from the grouting hole 4.
The connecting joint 2 is cylindrical, the diameter of the connecting joint is larger than that of the drill bit body 1, the connecting joint and the drill bit body 1 are integrally formed, the connecting joint 2 is communicated with a grouting channel, and an internal thread is formed in the inner wall of the connecting joint 2 and used for connection of a drill rod in a matching mode.
The outer wall of the drill bit body 1 is fixedly provided with a plurality of drill blades 7, the drill blades 7 are arranged at intervals along the circumferential direction of the drill bit body 1, and the drill blades 7 are used for damaging surrounding soil bodies in the drilling process so as to facilitate mixing of slurry and the soil bodies.
The limiting bulges 8 are fixedly arranged on the inner wall of the drill bit body 1 above the grouting hole 4, and the limiting bulges 8 can be uniformly arranged in a plurality of intervals around the inner wall of the drill bit body 1 and can also form a closed loop by the limiting bulges 8. The limiting protrusion 8 limits the moving distance of the blocking block 5, and the blocking block 5 is prevented from moving out of the slurry outlet under the action of the reset spring 6, so that the blocking cannot be performed.
The bottom of drill bit body 1 is equipped with erection column 9 in 5 below of shutoff piece, and 6 covers of reset spring establish on erection column 9, and on the one hand erection column 9 has spacing, stable effect to reset spring 6, and on the other hand can the butt when shutoff piece 5 downstream on erection column 9, avoids reset spring 6 to be compressed excessively, destroys reset spring 6.
The periphery cover at shutoff piece 5 is equipped with the rubber sleeve, and the rubber sleeve butt increases the leakproofness on the inner wall of drill bit body 1, avoids the thick liquid to flow into shutoff piece 5 below, inconvenient clearance and solidification.
Further, can dismantle the connection with pointed end 3 and drill bit body 1, can dismantle the connection and can be threaded connection, joint, and erection column 9 is fixed on pointed end 3 to be convenient for clear up the passageway of shutoff piece 5 and shutoff piece 5 bottom, also conveniently demolish shutoff piece 5 and change.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a prevent stifled high pressure jet drill bit suitable for sand bed which characterized in that: the drill bit comprises a drill bit body (1), wherein a connecting joint (2) used for being connected with a drill rod is arranged at the upper part of the drill bit body (1), a tip (3) is arranged at the lower end of the drill bit body, a grouting channel is formed in the drill bit body (1) along the axial direction of the drill bit body, and a grouting hole (4) communicated with the grouting channel is formed in the lower part of the drill bit body (1); slip casting in the lower part of drill bit body (1) and slide and be equipped with shutoff piece (5), the external diameter of shutoff piece (5) is the same with the internal diameter of slip casting passageway, be equipped with between shutoff piece (5) and drill bit body (1) and promote shutoff piece (5) and shield reset spring (6) of injected hole (4), reset spring (6) one end is connected with shutoff piece (5), and the other end is connected bottom drill bit body (1).
2. The anti-blocking high-pressure rotary jet drill bit suitable for the sand layer according to claim 1, is characterized in that: and a limiting bulge (8) for limiting the displacement distance of the plugging block (5) is arranged on the inner wall of the drill bit body (1) above the grouting hole (4).
3. The anti-blocking high-pressure rotary jet drill bit suitable for the sand layer according to claim 1, is characterized in that: the drill bit body (1) bottom is equipped with erection column (9) in shutoff piece (5) below, reset spring (6) cover is established at erection column (9).
4. The anti-blocking high-pressure rotary jet drill bit suitable for the sand layer according to claim 1, is characterized in that: the pointed end (3) is detachably connected with the drill bit body (1).
5. The anti-blocking high-pressure rotary jet drill bit suitable for the sand layer as claimed in claim 4, is characterized in that: the tip (3) is in threaded connection with the drill bit body (1).
6. The anti-blocking high-pressure rotary jet drill bit suitable for the sand layer according to claim 1, is characterized in that: the outer side wall of the drill bit body (1) is provided with a drill blade (7).
7. The anti-blocking high-pressure rotary jet drill bit suitable for the sand layer according to claim 1, is characterized in that: the connecting joint (2) is cylindrical, the diameter of the connecting joint is larger than that of the drill bit body (1), the connecting joint (2) is communicated with the grouting channel, and an internal thread is formed in the inner wall of the connecting joint (2).
8. The anti-blocking high-pressure rotary jet drill bit suitable for the sand layer according to claim 1, is characterized in that: and a rubber sleeve is sleeved outside the plugging block (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120037866.5U CN214303701U (en) | 2021-01-07 | 2021-01-07 | Anti-blocking high-pressure rotary jet drill bit suitable for sand layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120037866.5U CN214303701U (en) | 2021-01-07 | 2021-01-07 | Anti-blocking high-pressure rotary jet drill bit suitable for sand layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214303701U true CN214303701U (en) | 2021-09-28 |
Family
ID=77823109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120037866.5U Expired - Fee Related CN214303701U (en) | 2021-01-07 | 2021-01-07 | Anti-blocking high-pressure rotary jet drill bit suitable for sand layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214303701U (en) |
-
2021
- 2021-01-07 CN CN202120037866.5U patent/CN214303701U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210928 |