CN213540323U - Orifice closing device for drilling and grouting - Google Patents
Orifice closing device for drilling and grouting Download PDFInfo
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- CN213540323U CN213540323U CN202022126956.XU CN202022126956U CN213540323U CN 213540323 U CN213540323 U CN 213540323U CN 202022126956 U CN202022126956 U CN 202022126956U CN 213540323 U CN213540323 U CN 213540323U
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- drilling
- sleeve pipe
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Abstract
The utility model discloses a drilling is orifice closing means for slip casting, including sealing pipe, dado sleeve pipe, interior sleeve pipe, locate the mechanism of sealing on sealing pipe top and locate the return water branch pipe of sealing pipe lateral wall, the bottom and the dado sleeve pipe of sealing pipe pass through flange joint, interior sleeve pipe and the bottom threaded connection of sealing pipe insert in the dado sleeve pipe. This drill hole is drill way closing device for slip casting can effectively control drilling fluid from the clearance backward flow between drilling and its inside pipeline, prevents to bore and to cross the confined water sand bed and groundwater in a large number and upwelling cause the buried drilling accident and can realize accurate slip casting.
Description
Technical Field
The utility model relates to a ground seal or packing technical field especially relate to a drilling is orifice closing device for slip casting.
Background
When drilling and grouting construction is carried out in a deep covering layer, drilling holes with pipes or multi-stage sleeve pipes are needed to be drilled and wall protection is carried out, when drilling enters a pressure-bearing water sand layer, water and sand gushing conditions easily occur at orifices, so that buried drilling accidents are caused, and drilling construction cannot be continued. In the traditional treatment method, an orifice sealer is generally arranged at an orifice at the upper end of a retaining wall casing pipe, the orifice sealer is connected with the retaining wall casing pipe through a screw thread or a flange, and a rubber ball is vertically compressed to generate transverse expansion deformation so as to seal a gap between a drill rod and the casing pipe. When the drilling depth in the pressure-bearing water sand layer is large, a multi-stage casing protection wall needs to be adopted, or the buried casing needs to be subjected to downward variable-diameter hole forming, and the traditional single-pipe orifice sealer cannot meet the requirement of multi-pipe orifice sealing drilling grouting.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is overcome prior art's is not enough, provides one kind can the effective control drilling fluid from the drilling rather than the clearance between the inner pipe way backward flow, prevents to bore and to wear the confined water sand bed in time launch in a large number and cause the buried drilling accident and can realize the drilling for the slip casting orifice closing device of accurate slip casting.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a drilling is orifice closing means for slip casting, includes sealing tube, dado sleeve pipe, interior sleeve pipe, locates the mechanism of sealing on sealing tube top and locates the return water branch pipe of sealing tube lateral wall, the bottom and the dado sleeve pipe of sealing tube pass through flange joint, interior sleeve pipe and the bottom threaded connection of sealing tube insert in the dado sleeve pipe.
As a further improvement of the above technical solution:
the sealing pipe is characterized in that a conical external thread is arranged on the inner wall of the bottom end of the sealing pipe, a conical internal thread is arranged on the outer wall of the top end of the inner sleeve, and the external thread is connected with the internal thread in a matched mode.
The sealing mechanism comprises an annular expansion rubber ball and a pressing mechanism used for pressing the expansion rubber ball, an annular bearing support is arranged on the inner wall of the top end of the sealing pipe, and the expansion rubber ball is sleeved in the sealing pipe and supported on the annular bearing support.
The inner diameter of the annular bearing support is larger than the outer diameter of the drill rod.
The pressing mechanism comprises a pressing plate and at least two hinged seats, wherein the hinged seats are fixed on the peripheral wall of the sealing pipe and distributed at intervals around the periphery of the sealing pipe, each hinged seat is hinged with a lead screw, the pressing plate supports against the top surface of an expansion rubber ball, a U-shaped bayonet for a drill rod to penetrate is arranged on the pressing plate, and one end, far away from a hinged end, of each lead screw is penetrated through the pressing plate and connected with a clamping nut for clamping the pressing plate.
And U-shaped grooves are formed in the positions, corresponding to the screw rods, of the pressing plate, and the screw rods penetrate through the U-shaped grooves.
The outer diameter of the sealing pipe is the same as that of the wall protection sleeve.
The length of the sealing pipe is 3-4 times of the outer diameter of the sealing pipe.
The sealing pipe is a steel pipe.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a drilling is orifice closing device for slip casting, including sealing tube, dado sleeve pipe, interior sleeve pipe, locate the mechanism of sealing on sealing tube top and locate the return water branch pipe of sealing tube lateral wall, the bottom and the dado sleeve pipe of sealing tube pass through flange joint, interior sleeve pipe and the bottom threaded connection of sealing tube and insert in the dado sleeve pipe. The bottom end of the sealing pipe is connected with a retaining wall sleeve and an inner sleeve, the retaining wall and the flow guide effect is good, and the bottom end of the sealing pipe is connected with the retaining wall sleeve through a flange, so that underground confined water at the lower end of the retaining wall sleeve can be prevented from returning upwards through a gap between the retaining wall sleeve and the inner sleeve; the bottom threaded connection of interior sleeve pipe and sealing pipe can be with the accurate guide drill bit of drilling fluid, returns from the clearance between interior sleeve pipe and the drilling rod again, flows back to the liquid storage tank through the return water branch pipe again, compares with traditional single tube drill way obturator, and this drilling is orifice closing device for slip casting has promoted the application of dual sleeve pipe in drilling slip casting, can improve the drilling depth in having the overburden that presses, and the dado effect is better. This drill hole is drill way closing device for slip casting can effectively control drilling fluid from the clearance backward flow between drilling and its inside pipeline, prevents to bore and to cross the confined water sand bed and groundwater in a large number and upwelling cause the buried drilling accident and can realize accurate slip casting.
Drawings
Fig. 1 is a schematic structural view of the orifice closing device for drilling and grouting of the present invention.
Fig. 2 is a cross-sectional view taken along line a-a of fig. 1.
Fig. 3 is a cross-sectional view taken along line B-B of fig. 1.
FIG. 4 is a cross-sectional view taken at C in FIG. 1
The reference numerals in the figures denote:
1. sealing the tube; 11. an external thread; 2. a retaining wall bushing; 3. an inner sleeve; 31. an internal thread; 4. a sealing mechanism; 41. expanding the rubber ball; 42. a hold-down mechanism; 421. pressing a plate; 422. a hinged seat; 423. a screw rod; 424. a U-shaped bayonet; 425. tightly abutting the nut; 426. a U-shaped groove; 5. a return water branch pipe; 6. a flange; 7. an annular bearing support; 8. and (5) drilling a rod.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples.
Fig. 1 to 4 show the utility model discloses drill hole sealing device for slip casting's an embodiment, this drill hole sealing device for slip casting is including sealing tube 1, dado sleeve pipe 2, interior sleeve pipe 3, locate sealing tube 1 top seal the mechanism 4 and locate the return water branch pipe 5 of sealing tube 1 lateral wall, sealing tube 1's bottom and dado sleeve pipe 2 pass through flange 6 to be connected, interior sleeve pipe 3 and sealing tube 1's bottom threaded connection and insert in dado sleeve pipe 2.
The bottom end of the sealing tube 1 is connected with a wall protection sleeve 2 and an inner sleeve 3, and the wall protection and flow guide effects are good. The bottom end of the sealing pipe 1 is connected with the retaining wall sleeve 2 through a flange 6, so that underground pressure-bearing water at the lower end of the retaining wall sleeve 2 can be prevented from returning upwards through a gap between the retaining wall sleeve 2 and the inner sleeve 3; interior sleeve pipe 3 and the bottom threaded connection who seals pipe 1 can return from the clearance between interior sleeve pipe 3 and the drilling rod 8 with the accurate drill bit of leading of drilling fluid again, and through return water branch pipe 5 backward flow to the liquid storage tank, compare with traditional single tube drill way obturator, this drilling is orifice closing device for slip casting has promoted the application of dual sleeve pipe in drilling slip casting, can improve the drilling depth in having the overburden of pressure, and the dado effect is better. This drill hole is drill way closing device for slip casting can effectively control drilling fluid from the clearance backward flow between drilling and its inside pipeline, prevents to bore and to cross the confined water sand bed and groundwater in a large number and upwelling cause the buried drilling accident and can realize accurate slip casting.
In this embodiment, as shown in fig. 4, a tapered external thread 11 is provided on the inner wall of the bottom end of the sealing tube 1, a tapered internal thread 31 is provided on the outer wall of the top end of the inner sleeve 3, the external thread 11 is connected with the internal thread 31 in a matching manner, so that the connection is convenient and the leakage-proof effect of the joint is good.
In this embodiment, the sealing mechanism 4 includes an annular expansion rubber ball 41 and a pressing mechanism 42 for pressing the expansion rubber ball 41, an annular bearing support 7 is provided on the inner wall of the top end of the sealing tube 1, and the expansion rubber ball 41 is sleeved in the sealing tube 1 and supported on the annular bearing support 7. The expansion rubber ball 41 is of an annular structure, the inner diameter of the annular structure is slightly larger than the outer diameter of the drill rod 8, and the outer diameter of the annular structure is slightly smaller than the inner diameter of the sealing pipe 1. The expansion rubber ball 41 is used for sealing the gap between the drill rod 8 and the sealing pipe 1, is made of high-elasticity wear-resistant rubber, and can generate large elastic deformation in the vertical stress direction.
In the embodiment, the inner diameter of the annular bearing support 7 is larger than the outer diameter of the drill rod 8. Specifically, the sealing tube 1 is made of seamless steel tube, the outer diameter of the sealing tube 1 is the same as that of the wall protection sleeve 2, and the length of the sealing tube 1 is 3-4 times of the outer diameter of the sealing tube 1. The upper part of the inner wall of the sealing pipe 1 is provided with an annular bearing support 7, the annular bearing support 7 is made by cutting a steel plate, the outer diameter of the annular bearing support 7 is the same as the inner diameter of the sealing pipe 1, the inner diameter is about 5mm larger than the outer diameter of the drill rod 8, and the thickness is about 20 mm; the annular bearing support 7 is tightly fixed with the sealing pipe 1 in a welding mode, and the length between the upper end of the annular bearing support 7 and the pipe orifice of the sealing pipe 1 is slightly smaller than the total height of the expanded rubber ball 41 after extrusion and expansion.
In this embodiment, the pressing mechanism 42 includes a pressing plate 421 and at least two hinged seats 422, each hinged seat 422 is fixed on the outer peripheral wall of the sealing tube 1 and is distributed at intervals around the periphery of the sealing tube 1, each hinged seat 422 is hinged with a screw rod 423, the pressing plate 421 supports against the top surface of the expansion rubber ball 41, the pressing plate 421 is provided with a U-shaped bayonet 424 for the drill rod 8 to penetrate, one end of each screw rod 423, which is far away from the hinged end, is penetrated through the pressing plate 421 and is connected with a pressing nut 425 for pressing the pressing plate 421.
Set up two articulated seats 422 on sealing 1 outer wall of pipe, every articulated seat 422 is by two square little steel sheet welding preparation, and diameter 10mm shaft hole is seted up at square steel sheet plane middle part, and two square steel sheet shaft holes keep concentric during the welding, and the interval keeps 12 ~ 15 mm.
In this embodiment, as shown in fig. 2, a U-shaped groove 426 is formed on the pressing plate 421 at a position corresponding to each screw rod 423, and the screw rod 423 is inserted into the U-shaped groove 426. The pressing plate 421 is made by cutting a steel plate with a thickness of 10 mm-15 mm, and the larger the diameter of the sealing pipe 1 is, the thicker the thickness of the steel plate is; the two ends of the pressure plate 421 are respectively provided with a U-shaped groove 426 for installing the screw 423, the width of the U-shaped groove 426 is 1mm larger than the diameter of the screw 423, and the groove depth can ensure that the screw 423 keeps a vertical state after being installed; the U-shaped bayonet 424 is arranged in the middle of the sealing pipe 1, the width of the bayonet 424 is 4mm larger than the outer diameter of the drill rod 8, and the depth of the bayonet is enough to ensure that the sealing pipe 1 does not hinder the drill rod of the drilling machine from rotating after being installed.
The screw 423 is made of round steel with the diameter of 10mm, the shape of the screw is T-shaped, a horizontal rod of the screw is used as a pin shaft, two ends of the horizontal rod penetrate through the hinge base 422, a vertical rod can freely rotate along the horizontal pin shaft, and the end part of the vertical rod is threaded within the length range of 5mm and used for installing a nut.
The expansion rubber ball 41 is convenient to disassemble and assemble and reliable in sealing. When the expansion rubber ball 41 is installed, the expansion rubber ball 41 is only required to be pressed into the upper part of the sealing pipe 1 and placed on the annular bearing support 7, the pressing plate 421 is covered, the screw rods 423 are clamped in the U-shaped groove 426, the abutting nuts 425 on the screw rods 423 are screwed by a wrench, and then great vertical pressure can be applied to the expansion rubber ball 41 to enable the expansion rubber ball to generate transverse expansion, so that the gap between the drill rod 8 and the sealing pipe 1 is completely closed. The orifice sealing mode is reliable in sealing under the high-pressure condition, even if a drilling machine is used for driving the drill rod 8 to rotate at a low speed, the effective sealing of flushing liquid or slurry can be realized, and the orifice sealing mode can be used for drilling at a low speed under the pressure or grouting with the drill rod 8.
In this embodiment, the sealing pipe 1 is a steel pipe. The flange 6 comprises an upper disc and a lower disc, the upper disc is welded with the sealing pipe 1, the lower disc is welded with the wall protection sleeve 2, and a rubber sealing gasket is arranged between the upper disc and the lower disc and is in compression connection through bolts.
The backwater branch pipe 5 is arranged at the lower part of the sealing pipe 1, the position of the backwater branch pipe is positioned at the lower part of the annular bearing support 7, the distance between the backwater branch pipe 5 and the annular bearing support is about 10mm, the axis of the backwater branch pipe 5 is vertical to the axis of the sealing pipe 1, and the connecting part is sealed in a welding mode; the pipe diameter of the return water branch pipe 5 is 50mm, the length is 100 mm-150 mm, and a thread with the width of 50mm is processed outside the pipe orifice.
The working principle is as follows:
when drilling and grouting are carried out in a confined water stratum by adopting a double sleeve, the sealing pipe 1 is in threaded connection with the inner sleeve 3, and the wall protection sleeve 2 and the inner sleeve 3 are lowered into a drilled hole; the lower end of the sealing pipe 1 is connected with the retaining wall sleeve 2 in an aligning way through a flange 6; a drill rod 8 is put into a drilled hole from the inside of the sealing pipe 1, when the drill rod is put to a preset depth, an expansion rubber ball 41 is sleeved on the drill rod 8 and then is pressed into the sealing pipe 1 in a sliding manner to be tightly propped against the annular bearing support 7; the drill rod 8 is clamped by the U-shaped bayonet 424 in the middle of the pressure plate 421, the screw rod 423 is rotated upwards to be embedded into the U-shaped groove 426 of the pressure plate 421, the pressing plate 421 presses the expansion rubber ball 41 by screwing the abutting nut 425, and the expansion rubber ball 41 generates transverse expansion deformation, so that the annular gap between the drill rod 8 and the sealing pipe 1 is sealed.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a drilling is orifice closing device for slip casting which characterized in that: including sealing pipe (1), dado sleeve pipe (2), interior sleeve pipe (3), locate sealing mechanism (4) on pipe (1) top and locate return water branch pipe (5) that seals pipe (1) lateral wall, the bottom of sealing pipe (1) is connected through flange (6) with dado sleeve pipe (2), interior sleeve pipe (3) and the bottom threaded connection who seals pipe (1) insert in dado sleeve pipe (2).
2. The orifice closing device for borehole grouting according to claim 1, characterized in that: be equipped with on the bottom inner wall of sealing pipe (1) and be conical external screw thread (11), be equipped with on the top outer wall of interior sleeve pipe (3) and be conical internal thread (31), external screw thread (11) are connected with internal thread (31) cooperation.
3. The orifice closing device for borehole grouting according to claim 1, characterized in that: the sealing mechanism (4) comprises an annular expansion rubber ball (41) and a pressing mechanism (42) for pressing the expansion rubber ball (41), an annular bearing support (7) is arranged on the inner wall of the top end of the sealing pipe (1), and the expansion rubber ball (41) is sleeved in the sealing pipe (1) and supported on the annular bearing support (7).
4. The orifice closing device for borehole grouting according to claim 3, characterized in that: the inner diameter of the annular bearing support (7) is larger than the outer diameter of the drill rod (8).
5. The orifice closing device for borehole grouting according to claim 3, characterized in that: hold-down mechanism (42) are including clamp plate (421) and two at least articulated seats (422), each articulated seat (422) are fixed on the periphery wall of sealing pipe (1) and around the periphery interval distribution of sealing pipe (1), each all articulated lead screw (423) on articulated seat (422), clamp plate (421) support in the top surface of inflation rubber ball (41), be equipped with U-shaped bayonet socket (424) that supply drilling rod (8) to penetrate on clamp plate (421), each lead screw (423) keep away from the one end of hinged end and all wear to locate in clamp plate (421) and be connected with the tight nut (425) that support that is used for supporting clamp plate (421).
6. The orifice closing device for borehole grouting according to claim 5, characterized in that: u-shaped grooves (426) are formed in the positions, corresponding to the screw rods (423), of the pressing plate (421), and the screw rods (423) are arranged in the U-shaped grooves (426) in a penetrating mode.
7. The orifice closing device for borehole grouting according to any of claims 1 to 6, characterized in that: the outer diameter of the sealing pipe (1) is the same as that of the wall protection sleeve (2).
8. The orifice closing device for borehole grouting according to claim 7, characterized in that: the length of the sealing tube (1) is 3-4 times of the outer diameter of the sealing tube (1).
9. The orifice closing device for borehole grouting according to any of claims 1 to 6, characterized in that: the sealing pipe (1) is a steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022126956.XU CN213540323U (en) | 2020-09-24 | 2020-09-24 | Orifice closing device for drilling and grouting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022126956.XU CN213540323U (en) | 2020-09-24 | 2020-09-24 | Orifice closing device for drilling and grouting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213540323U true CN213540323U (en) | 2021-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022126956.XU Active CN213540323U (en) | 2020-09-24 | 2020-09-24 | Orifice closing device for drilling and grouting |
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| Country | Link |
|---|---|
| CN (1) | CN213540323U (en) |
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2020
- 2020-09-24 CN CN202022126956.XU patent/CN213540323U/en active Active
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