CN218971188U - Novel advance small catheter capable of locally increasing grouting range - Google Patents
Novel advance small catheter capable of locally increasing grouting range Download PDFInfo
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- CN218971188U CN218971188U CN202222445258.5U CN202222445258U CN218971188U CN 218971188 U CN218971188 U CN 218971188U CN 202222445258 U CN202222445258 U CN 202222445258U CN 218971188 U CN218971188 U CN 218971188U
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Abstract
The utility model discloses a novel advanced small guide pipe capable of locally increasing a grouting range, which comprises a pipe head, a grouting barrel, a local grouting reinforcement mechanism and a plurality of grouting holes, wherein the pipe head is connected with one end of the grouting barrel, the plurality of grouting holes are uniformly arranged on the side wall of the grouting barrel at intervals, the local grouting reinforcement mechanism is arranged in the grouting barrel, the local grouting reinforcement mechanism comprises a rolling bearing, a first overhanging connecting piece, a connecting shaft, a plurality of first spiral mechanisms and a plurality of second spiral mechanisms, the rolling bearing is arranged on the end face of the pipe head connected with the grouting barrel, the first overhanging connecting piece comprises a plurality of first connecting rods, the plurality of first connecting rods are arranged in the rolling bearing, the movable ends of the plurality of first connecting rods are respectively inserted and fixed with corresponding grooves on the connecting shaft, and the plurality of first spiral mechanisms and the plurality of second spiral mechanisms are sleeved on the connecting shaft. The utility model can solve the problems that the grouting range of the existing advanced small guide pipe is smaller and the grouting range of certain specific weak surrounding rock parts cannot be locally increased.
Description
Technical Field
The utility model belongs to the technical field of advanced support of tunnels, and particularly relates to a novel advanced small catheter capable of locally increasing grouting range.
Background
In the tunnel construction process, accidents of surrounding rock collapse instability caused by existence of weak broken rock bodies are frequent, the weak broken rock bodies are low in strength and poor in anti-interference capability, and the surrounding rock instability is extremely easy to disturb during construction. In order to prevent collapse of weak surrounding rock, pretreatment of rock strata above the soft surrounding rock is often needed to be carried out before face excavation.
As a common advance support mode in actual tunnel construction, the advance small guide pipe has the advantages of simple construction equipment, simple process and strong grouting adaptability. During practical construction, grouting is carried out in the small guide pipe, so that the tunnel surrounding rock, the small guide pipe and the small guide pipe grouting reinforcement area are solidified, a shed frame supporting system is formed in a certain range, and the stability of the surrounding rock is improved.
The traditional advanced small guide pipe grouting can achieve the purpose of increasing the grouting range only by applying certain grouting pressure, the actual grouting reinforcement range is smaller, and the grouting range can not be locally increased for certain specific weak surrounding rock positions. Therefore, it is necessary to design a novel advanced small catheter transformer that can locally increase the grouting range.
Disclosure of Invention
The utility model provides a novel advanced small guide pipe capable of locally increasing a grouting range, which can solve the problems that the grouting range of the traditional advanced small guide pipe is smaller and the grouting range of certain specific weak surrounding rock parts cannot be locally increased.
The utility model aims to provide a novel advanced small guide pipe capable of locally increasing grouting range, which comprises a pipe head, a grouting barrel, a local grouting reinforcement mechanism and a plurality of grouting holes;
the two ends of the grouting cylinder are opened, the pipe head is connected with one end of the grouting cylinder, the grouting holes are uniformly spaced on the side wall of the grouting cylinder, and the local grouting reinforcement mechanism is arranged in the grouting cylinder.
Preferably, the local grouting reinforcement mechanism comprises a rolling bearing, a first overhanging connecting piece, a connecting shaft, a plurality of first spiral mechanisms and a plurality of second spiral mechanisms, wherein the rolling bearing is arranged on the end face of a pipe head connected with the grouting barrel, the first overhanging connecting piece comprises a plurality of first connecting rods, the first connecting rods are arranged in the rolling bearing at intervals, a plurality of grooves which are parallel to each other are uniformly spaced on the outer side face of the connecting shaft along the circumferential direction, two ends of the grooves are respectively communicated with two ends of the connecting shaft, the number and the positions of the grooves are respectively matched with the number and the positions of the first connecting rods, the movable ends of the first connecting rods are respectively fixedly inserted into corresponding grooves on the connecting shaft, and the first spiral mechanisms and the second spiral mechanisms are sequentially sleeved on the connecting shaft.
Preferably, each first screw mechanism comprises a first screw leaf sleeve mechanism and a first screw blade, the first screw blade is arranged on the outer side face of the first screw leaf sleeve mechanism, the second screw mechanism comprises a second screw leaf sleeve mechanism and a second screw blade, the second screw blade is arranged on the outer side face of the second screw leaf sleeve mechanism, and the structures of the first screw leaf sleeve mechanism and the second screw leaf sleeve mechanism are identical.
Preferably, each first helical blade sleeve mechanism comprises a second outward extending connecting piece and a mounting cylinder, the second outward extending connecting piece comprises a plurality of second connecting rods, the plurality of second connecting rods are arranged on the inner side wall of the mounting cylinder at intervals parallel to each other along the length direction of the mounting cylinder, the number and positions of the plurality of second connecting rods are matched with the number and positions of the plurality of grooves, the mounting cylinder is inserted into the corresponding grooves on the connecting shaft through the plurality of second connecting rods, and the first helical blades are arranged on the outer side face of the mounting cylinder.
Preferably, the movable end of the connecting shaft is provided with a cover plate, and the cover plate is positioned at the outer side of the first screw mechanism or the second screw mechanism farthest from the pipe head.
Preferably, the tube head is of an inverted cone structure.
Compared with the prior art, the utility model has the beneficial effects that:
according to the novel advanced small guide pipe capable of locally increasing the grouting range, grouting pressure borne by the spiral blade can be converted into forward compressive stress and circumferential shear stress through the local grouting reinforcement mechanism, slurry enters the cylindrical pipe body under the pushing action of the forward compressive stress, the circumferential shear stress enables the spiral blade to rotate, the slurry enters the small guide pipe along with the spiral blade in a spiral manner, the slurry is conveyed to be converted into a spiral path from a traditional horizontal path, and the time for the slurry to pass through a grouting hole is prolonged, so that the grouting range is remarkably increased; the centrifugal force generated when the spiral blade rotates shortens the length of the slurry passing through the grouting holes, and the effect of increasing the grouting range is achieved; the time required for the slurry to pass through the second spiral blade is longer than that of the first spiral blade, and the slurry can be freely combined according to surrounding rock conditions during installation, so that the aim of locally increasing the grouting range of a designated position is fulfilled.
Drawings
FIG. 1 is a perspective view of a novel advanced small catheter capable of locally increasing grouting range according to an embodiment of the present utility model;
FIG. 2 is a perspective view of a novel advanced small catheter with locally increased grouting range provided by an embodiment of the present utility model;
FIG. 3 is a schematic exploded view of a novel advance small catheter capable of locally increasing grouting range according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram showing an exploded structure of a cover plate and a connecting shaft according to an embodiment of the present utility model;
FIG. 5 is a schematic view of a connection structure of a rolling bearing and a first overhanging connecting member according to an embodiment of the utility model;
FIG. 6 is a schematic view of a first helical lobe sleeve mechanism in accordance with an embodiment of the present utility model;
FIG. 7 is a schematic view of a first helical lobe sleeve mechanism in accordance with an embodiment of the present utility model from another perspective;
FIG. 8 is a schematic view of a connection structure of a first or second helical blade sleeve mechanism and a connecting shaft according to an embodiment of the present utility model;
FIG. 9 is a schematic view of the structure of a first helical blade and a second helical blade in an embodiment of the utility model;
FIG. 10 is a schematic view of the connection structure of the first and second helical blades to the first and second helical blade sleeve mechanisms, respectively, in an embodiment of the present utility model;
FIG. 11 is a schematic view of a connection structure between a first screw mechanism and a second screw mechanism and a connecting shaft according to an embodiment of the present utility model;
in the figure: 1. a tube head; 2. grouting cylinder; 3. grouting holes; 4. a local grouting reinforcement device; 5. a connecting shaft; 6. a cover plate; 7. a rolling bearing; 8. a first overhanging connection; 9. a mounting cylinder; 10. a first helical blade; 11. a second helical blade; 12. a first helical leaf sleeve mechanism; 13. a second helical blade sleeve mechanism; 14. a second outwardly extending connector; 15. a groove.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1 to 11, the embodiment of the utility model provides a novel advance small catheter capable of locally increasing grouting range, which comprises a pipe head 1, a grouting barrel 2, a local grouting reinforcement mechanism 4 and a plurality of grouting holes 3;
the two ends of the grouting barrel 2 are opened, the pipe head 1 is connected with one end of the grouting barrel 2, a plurality of grouting holes 3 are uniformly spaced on the side wall of the grouting barrel 2, and a local grouting reinforcement mechanism 4 is arranged in the grouting barrel 2.
The local grouting reinforcement mechanism 4 comprises a rolling bearing 7, a first overhanging connecting piece 8, a connecting shaft 5, a plurality of first spiral mechanisms 12 and a plurality of second spiral mechanisms 13, wherein the rolling bearing 7 is welded on the end face of the pipe head 1 connected with the grouting barrel 2, the connecting shaft 5 is made of aluminum alloy, when grouting pressure is applied to the pipe head, the local grouting reinforcement mechanism 4 can rotate 360 degrees in the grouting barrel 2 along with the rolling bearing 7 through the design of the rolling bearing 7, the first overhanging connecting piece 8 comprises a plurality of first connecting rods, the first connecting rods are welded inside the rolling bearing 7 at intervals, a plurality of grooves 15 which are parallel to each other are uniformly arranged on the outer side face of the connecting shaft 5 at intervals along the circumferential direction, two ends of the grooves 15 are respectively communicated with two ends of the connecting shaft 5, the number and the positions of the grooves 15 are respectively matched with those of the first connecting rods, the movable ends of the first connecting rods are respectively spliced with the corresponding grooves 15 on the connecting shaft 5, the first spiral mechanisms 12 and the second spiral mechanisms 13 are sequentially sleeved on the connecting shaft 5.
After the whole device is installed, the connecting shaft 5 is wrapped by the installation cylinder 9 to form a first protection, the rotation radius of the second helical blade 11 is smaller than the inner diameter of the grouting cylinder 2 by 1cm, the slurry can compensate for the 1cm space area during grouting, the inside of the pipe is similar to solid but rotatable, so the whole second protection can be used, the connecting shaft 5 can start rotating after grouting starts, the force of the slurry can be decomposed under the action of the rotating force, the impact on the whole assembly structure can be reduced, a third protection layer is formed, and the fixing of the connecting shaft 5 can be realized only by firmly welding one end of the connecting shaft 5 with the first overhanging connecting piece 8 on the rolling bearing 7.
Each first screw mechanism 12 comprises a first screw blade sleeve mechanism and a first screw blade 10, the first screw blade 10 is welded on the outer side surface of the first screw blade sleeve mechanism, the second screw mechanism 13 comprises a second screw blade sleeve mechanism and a second screw blade 11, the second screw blade 11 is welded on the outer side surface of the second screw blade sleeve mechanism, and the structures of the first screw blade sleeve mechanism and the second screw blade sleeve mechanism are identical.
Each first spiral vane sleeve mechanism comprises a second outward extending connecting piece 14 and an installation cylinder 9, the second outward extending connecting piece 14 comprises a plurality of second connecting rods, the second connecting rods are welded on the inner side wall of the installation cylinder 9 at intervals parallel to each other along the length direction of the installation cylinder 9, the number positions of the second connecting rods are matched with the number and positions of the grooves 15, the installation cylinder 9 is spliced with the corresponding grooves 15 on the connecting shaft 5 through the second connecting rods, and the first spiral vanes 10 are welded on the outer side face of the installation cylinder 9. The first and second male connectors 8, 14 in this embodiment of the utility model are identical in structure and size, and the number of first, second and female connectors is preferably 4.
Specifically, the bottom of the mounting cylinder 9 on the subsequent first helical blade sleeve mechanism or second helical blade sleeve mechanism is inserted into the corresponding groove 15 on the connecting shaft 5, and the end of the first overhanging connecting piece 8 or second overhanging connecting piece 14 on the mounting cylinder is made to abut against the movable end of the first overhanging connecting piece 8 or second overhanging connecting piece 14 of the mounting cylinder 9 on the previous first helical blade sleeve mechanism or second helical blade sleeve mechanism, so that the combination connection is performed, and all the first helical blade sleeve mechanisms or second helical blade sleeve mechanisms are all mounted on the connecting shaft 5 repeatedly.
The length of the second connecting rod is the same as that of the mounting cylinder 9, one end of the second connecting rod is positioned at the inner side of the mounting cylinder 9, and the other end of the second connecting rod extends to the outer side of the mounting cylinder 9. Such a design can facilitate the plug-in combination of the latter first or second helical blade sleeve mechanism with the former first or second helical blade sleeve mechanism to achieve a secure connection.
The radius of rotation of the first helical blade 10 is smaller than the radius of rotation of the second helical blade 11. Through the design, the time required for the slurry to pass through the second spiral blade 11 is longer than that of the first spiral blade 10, so that the first spiral mechanism 12 and the plurality of second spiral mechanisms 13 are correspondingly arranged on the connecting shaft 5 according to the specific positions of weak surrounding rocks, the aim of locally increasing the grouting range of the designated positions can be fulfilled, specifically, the second spiral blade 11 is selected for the position with poor surrounding rock conditions, and the first spiral blade 10 is selected for the position with relatively good surrounding rock conditions.
The radius of rotation of the second helical blade 11 is 1cm smaller than the inner diameter of the grouting cylinder 2. This design ensures that both the first and second helical blades 10, 11 can rotate smoothly within the grouting barrel 2.
The movable end of the connecting shaft 5 is welded with a cover plate 6, and the cover plate 6 is positioned outside the first screw mechanism 12 or the second screw mechanism 13 farthest from the pipe head 1. By designing the cover plate 6, the plurality of first screw mechanisms 12 and the plurality of second screw mechanisms 13 can be fixed as a whole, and thus a local increase in grouting area can be achieved.
The tube head 1 is of an inverted cone structure.
The novel advanced small guide pipe capable of locally increasing the grouting range is installed through the following steps:
s1, determining the specific position of weak surrounding rock, and respectively marking the corresponding part with poor surrounding rock condition and the corresponding part with relatively good surrounding rock condition on the connecting shaft 5 according to the specific position of the weak surrounding rock;
s2, arranging a rolling bearing 7 at the bottom of the pipe head 1, arranging a first overhanging connecting piece 8 in the rolling bearing 7, splicing the movable end of the first overhanging connecting piece 8 with a groove on the connecting shaft 5, and respectively connecting a first spiral blade sleeve mechanism and a second spiral blade sleeve mechanism with a first spiral blade 10 and a second spiral blade 11 to form a first spiral mechanism and a second spiral mechanism;
s3, installing a second screw mechanism 13 on the connecting shaft 5 at a position corresponding to the position marked by the step S1 and having poor surrounding rock conditions, installing a first screw mechanism 12 on the connecting shaft 5 at a position corresponding to the position marked by the step S1 and having relatively good surrounding rock conditions, repeatedly performing the installation operation until all the first screw mechanisms 12 or the second screw mechanisms 13 are installed on the connecting shaft 5, arranging a cover plate 6 at the movable end of the connecting shaft 5, fixing the first screw mechanism 12 and the second screw mechanisms 13, sleeving the grouting barrel 2 on the outer side of the local grouting reinforcement mechanism 4, and fixedly connecting one end of the grouting barrel 2 with the pipe head 1 to obtain the advanced small guide pipe.
When the novel leading small guide pipe capable of locally increasing the grouting range is used, firstly, the leading small guide pipe is arranged at a corresponding position, grouting is carried out through the opening end of the leading small guide pipe, after slurry enters the grouting cylinder 2, the first spiral blade 10 and the second spiral blade 11 are subjected to grouting pressure, the grouting pressure is converted into forward compressive stress and circumferential shear stress, the slurry continuously enters the grouting cylinder 2 forward under the pushing action of the forward compressive stress, the circumferential shear stress enables the first spiral blade 10 and the second spiral blade 11 to rotate around the rolling bearing 7 in the grouting cylinder 2, the slurry enters the grouting cylinder 2 in a spiral manner along with the first spiral blade 10 and the second spiral blade 11, the slurry is conveyed to be converted into a spiral path from a traditional horizontal path, and the time of the slurry passing through the grouting holes 3 is prolonged, so that the grouting range is remarkably increased; the centrifugal force generated when the first helical blade 10 and the second helical blade 11 rotate shortens the length of time for the slurry to pass through the grouting holes, and the effect of increasing the grouting range is also achieved, and because the time required for the slurry to pass through the second helical blade 11 is longer than that of the first helical blade 10, the first helical mechanism 12 and the second helical mechanism 13 are correspondingly arranged on the connecting shaft 5 according to the specific position of the weak surrounding rock, and the aim of locally increasing the grouting range at the designated position can be achieved.
The embodiment of the utility model is not only limited to the aim of locally increasing the grouting range at the designated position, but also can integrally reinforce the area with poor surrounding rock condition in the actual engineering. The second screw mechanism 13 is only required to be installed on the connecting shaft 5 of the partial grouting reinforcement device 4 entirely.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. The novel advanced small guide pipe capable of locally increasing grouting range is characterized by comprising a pipe head (1), a grouting barrel (2), a local grouting reinforcement mechanism (4) and a plurality of grouting holes (3);
the two ends of the grouting barrel (2) are opened, the pipe head (1) is connected with one end of the grouting barrel (2), the grouting holes (3) are uniformly arranged on the side wall of the grouting barrel (2) at intervals, and the local grouting reinforcement mechanism (4) is arranged in the grouting barrel (2);
local slip casting reinforcing mechanism (4) contain antifriction bearing (7), first overhanging connecting piece (8), connecting axle (5), a plurality of first screw mechanism (12) and a plurality of second screw mechanism (13), antifriction bearing (7) set up on tube head (1) terminal surface of being connected with slip casting section of thick bamboo (2), first overhanging connecting piece (8) contain a plurality of head rods, a plurality of head rods interval set up in antifriction bearing (7) inside, evenly spaced apart along the circumferencial direction on connecting axle (5) lateral surface is equipped with a plurality of recess (15) that are parallel to each other, the both ends of recess (15) are linked together with the both ends of connecting axle (5) respectively, quantity and the position phase-match of recess (15) respectively, the expansion end of a plurality of head rods is pegged graft fixedly with recess (15) that correspond on connecting axle (5) respectively, a plurality of first screw mechanism (12) and a plurality of second screw mechanism (13) are located on connecting axle (5) in proper order.
2. The novel small advance pipe capable of locally increasing grouting range according to claim 1, wherein each first screw mechanism (12) comprises a first screw sleeve mechanism and a first screw blade (10), the first screw blade (10) is arranged on the outer side surface of the first screw sleeve mechanism, the second screw mechanism (13) comprises a second screw sleeve mechanism and a second screw blade (11), the second screw blade (11) is arranged on the outer side surface of the second screw sleeve mechanism, and the first screw sleeve mechanism and the second screw sleeve mechanism are identical in structure.
3. The novel advanced small guide pipe capable of locally increasing grouting range according to claim 2, wherein each first spiral vane sleeve mechanism comprises a second outward extending connecting piece (14) and a mounting barrel (9), the second outward extending connecting piece (14) comprises a plurality of second connecting rods, the plurality of second connecting rods are arranged on the inner side wall of the mounting barrel (9) at intervals parallel to each other along the length direction of the mounting barrel (9), the number positions of the plurality of second connecting rods are matched with the number and positions of the plurality of grooves (15), the mounting barrel (9) is spliced with the corresponding grooves on the connecting shaft (5) through the plurality of second connecting rods, and the first spiral vanes (10) are arranged on the outer side face of the mounting barrel (9).
4. The novel advance small guide pipe capable of locally increasing grouting range according to claim 1, wherein the movable end of the connecting shaft (5) is provided with a cover plate (6), and the cover plate (6) is positioned on the outer side of the first screw mechanism (12) or the second screw mechanism (13) farthest from the pipe head (1).
5. The novel advance small pipe capable of locally increasing grouting range as claimed in claim 1, wherein the pipe head (1) is of an inverted cone structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222445258.5U CN218971188U (en) | 2022-09-14 | 2022-09-14 | Novel advance small catheter capable of locally increasing grouting range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222445258.5U CN218971188U (en) | 2022-09-14 | 2022-09-14 | Novel advance small catheter capable of locally increasing grouting range |
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| Publication Number | Publication Date |
|---|---|
| CN218971188U true CN218971188U (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222445258.5U Active CN218971188U (en) | 2022-09-14 | 2022-09-14 | Novel advance small catheter capable of locally increasing grouting range |
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|---|---|
| CN (1) | CN218971188U (en) |
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- 2022-09-14 CN CN202222445258.5U patent/CN218971188U/en active Active
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