Foaming expansion type advanced small guide pipe grouting rapid plugging device

Abstract

The utility model relates to a foaming expansion type advanced small guide pipe grouting rapid plugging device which comprises an advanced small guide pipe inserted into a drill hole formed in a surrounding rock wall face. The latex film is in a circular ring shape and is of a hollow cavity structure, filling holes are formed in the latex film, and the latex film is arranged on the advanced small guide pipe in a sleeving mode and located in the drill hole close to the wall face of the surrounding rock; one end of the foaming material injection pipe is communicated with the filling hole of the latex film; and the foaming gun is mounted at the other end of the foaming material injection pipe. Through the combination of the foaming material and the latex film, rapid and effective grouting plugging can be achieved, and important practical value is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of grouting plugging of advanced small pipes, in particular to a rapid plugging device for grouting of an advanced small pipe with foaming and expansion type. Background Technique

[0002] In underground engineering, in order to improve the surrounding rock condition, enhance the self-bearing capacity of the surrounding rock, and ensure the safety of tunnel construction, grouting reinforcement is often required. In order to ensure that the grouting slurry fills the voids and prevent the slurry from flowing back, it is necessary to densely fill the void between the advanced small pipe and the borehole wall near the borehole entrance.

[0003] The existing grouting plugging devices have the disadvantages of complex structure, cumbersome operation, high price, and incomplete plugging. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a rapid plugging device for grouting of an advanced small pipe with foaming and expansion type, which can achieve rapid and effective grouting plugging through the combination of foaming material and latex film, and has important practical value.

[0005] In order to solve the above problems, a rapid plugging device for grouting of an advanced small pipe with foaming and expansion type is adopted, including:

[0006] An advanced small pipe, which is inserted into a borehole opened on the surrounding rock wall surface;

[0007] A latex film, which is circular and has a hollow cavity structure, and is provided with a filling hole. The latex film is sleeved on the advanced small pipe and is located in the borehole near the surrounding rock wall surface;

[0008] A foaming material injection pipe, one end of which is communicated with the filling hole of the latex film;

[0009] A foaming gun, which is installed at the other end of the foaming material injection pipe.

[0010] With such a structure, the foaming material is injected into the latex film and fills the inside of the latex film, so that the latex film expands to block the borehole, which can play the role of a grout stopper. Moreover, compared with the circular cross-section of the conventional grout stopper, the irregular cross-section generated after the expansion of the latex film fits the borehole surface better, and the blocking effect is better.

[0011] As a further improvement of the utility model, it further includes:

[0012] A check valve, the outlet end of which is installed at one end of the advanced small pipe extending out of the borehole;

[0013] A joint, which is installed at the inlet end of the check valve;

[0014] A grouting pipe, which is communicated with the joint;

[0015] The grouting pump is connected to the grouting pipe.

[0016] With such a structure, the check valve is convenient for preventing the reverse flow of grouting.

[0017] As a further improvement of the present utility model, one end of the advanced small duct extending out of the drill hole passes through the steel arch.

[0018] With such a structure, the steel arch is convenient for positioning the advanced small duct.

[0019] As a further improvement of the present utility model, the advanced small duct is made of cold-rolled seamless steel pipe, with a wall thickness of 3.5 mm, a diameter of 42 mm, a single length of 3.5 m, an external insertion angle of 10° - 15°, and the longitudinal overlapping length of adjacent two rows of advanced small ducts is not less than 1 m.

[0020] As a further improvement of the present utility model, the latex film is made of high-elastic latex, with an elongation rate within 900% and a tensile strength of 30 Mpa.

[0021] With such a structure, it has a large elastic range and is suitable for filling larger drill holes.

[0022] As a further improvement of the present utility model, the foaming material injection pipe is made of the same material as the latex film and is integrally formed.

[0023] As a further improvement of the present utility model, the foaming material in the foaming gun is polyurethane foam.

[0024] As a further improvement of the present utility model, the front-end opening diameter of the check valve is larger than the opening diameter of the extending end of the advanced small duct, and the two are sleeved and adapted.

[0025] As a further improvement of the present utility model, a manual regulating valve is installed between the check valve and the joint.

[0026] With such a structure, the check valve prevents reverse flow, and the manual regulating valve can control the flow rate.

[0027] As a further improvement of the present utility model, both ends of the joint are metal threads, and the middle is a rubber tube, which is connected to the check valve and the grouting pipe by a threaded connection method; both ends of the grouting pipe are metal threads, and the middle is a high-pressure resistant rubber tube, which is connected to the joint and the grouting pump by a threaded connection method.

[0028] As a further improvement of the present utility model, the grouting pump is a single-cylinder piston type, with an outer dimension of 1250 mm in length, 430 mm in width, 850 mm in height, a total machine weight of 250 kg, and a maximum conveying pressure of 1.5 MPa.

[0029] In the present utility model, the high-elastic latex film and the foaming material injection pipe are prefabricated. Before grouting, they are glued to the specified positions on the advanced small duct with strong glue and enter the drilling hole along with the insertion of the advanced small duct. The foaming material injection pipe is connected to a foaming gun, and the foaming material is injected into the high-elastic latex film through the foaming gun. The whole device has a simple structure, convenient operation and high economic benefits. The foaming material is polyurethane foam, which has uniform foaming and can be quickly cured. After curing, the pore structure is dense. The high-elastic latex film has high elasticity and can produce non-uniform deformation. After the foaming material expands, the high-elastic latex film can be completely attached to the boundary of the surrounding rock of the drilling hole, and the plugging effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the embodiment.

[0031] Figure 2 It is a schematic diagram of the structure for installing a manual regulating valve.

[0032] Figure 3 It is a schematic diagram of the structure of the advanced small duct.

[0033] Figure 4 It is a schematic diagram of the structure of the latex film and the foaming material injection pipe.

[0034] Figure 5 It is a schematic cross-sectional view of the complete attachment of the latex film to the boundary of the surrounding rock of the drilling hole.

[0035] Reference numerals: 1, advanced small duct; 2, latex film; 3, foaming material injection pipe; 4, foaming gun; 5, steel arch; 6, check valve; 7, joint; 8, grouting pipe; 9, grouting pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0037] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; in addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] Embodiment 1

[0039] As Figures 1 - 5 shown, a rapid plugging device for grouting of a foaming and expanding advanced small duct includes:

[0040] An advanced small duct 1, which is inserted into a drill hole opened on the surrounding rock wall surface;

[0041] A latex film 2, which is circular and has a hollow cavity structure, and a filling hole is opened thereon. The latex film 2 is sleeved on the advanced small duct 1 and is located in the drill hole close to the surrounding rock wall surface;

[0042] A foaming material injection pipe 3, one end of which is communicated with the filling hole of the latex film 2;

[0043] A foaming gun 4, which is installed at the other end of the foaming material injection pipe 3;

[0044] With such a structure, the foaming material is injected into the latex film 2 and fills the inside of the latex film 2, so that the latex film 2 expands to block the drill hole, which can play the role of a grout stopper. Moreover, compared with the circular cross-section of the conventional grout stopper, the irregular cross-section generated after the expansion of the latex film 2 fits the drill hole surface better and the plugging effect is better.

[0045] In this embodiment, it further includes:

[0046] A check valve 6, the outlet end of which is installed at one end of the advanced small duct 1 extending out of the drill hole;

[0047] A joint 7, which is installed at the inlet end of the check valve 6;

[0048] A grouting pipe 8, which is communicated with the joint 7;

[0049] The grouting pump 9 is connected to the grouting pipe 8.

[0050] With such a structure, the check valve 6 is convenient for preventing the reverse flow of the slurry.

[0051] In this embodiment, one end of the advanced small duct 1 extending out of the drill hole passes through the steel arch 5.

[0052] With such a structure, the steel arch 5 is convenient for positioning the advanced small duct 1.

[0053] In this embodiment, the advanced small duct 1 is made of cold-rolled seamless steel pipe, with a wall thickness of 3.5 mm, a diameter of 42 mm, a single length of 3.5 m, an external insertion angle of 10° to 15°, and the longitudinal lap length of adjacent two rows of advanced small ducts 1 is not less than 1 m.

[0054] In this embodiment, the latex film 2 is made of high-elastic latex, with an elongation rate of 900% and a tensile strength of 30 Mpa.

[0055] With such a structure, the elastic range is large, which is suitable for stuffing larger drill holes.

[0056] In this embodiment, the foaming material injection pipe 3 is made of the same material as the latex film 2 and is integrally formed.

[0057] In this embodiment, the foaming material in the foaming gun 4 is polyurethane foam.

[0058] In this embodiment, the front end opening diameter of the check valve 6 is larger than the opening diameter of the extending end of the advanced small duct 1, and the two are sleeved and adapted.

[0059] In this embodiment, a manual regulating valve is installed between the check valve 6 and the joint 7.

[0060] With such a structure, the check valve prevents reverse flow, and the manual regulating valve can control the flow rate.

[0061] In this embodiment, both ends of the joint 7 are metal threads, and the middle is a rubber tube. It is connected to the check valve 6 and the grouting pipe 8 by a threaded connection method; both ends of the grouting pipe 8 are metal threads, and the middle is a high-pressure resistant rubber tube. It is connected to the joint 7 and the grouting pump 9 by a threaded connection method.

[0062] In this embodiment, the grouting pump 9 is a single-cylinder piston type, with an outer dimension of 1250 mm in length, 430 mm in width, 850 mm in height, a total machine weight of 250 kg, and a maximum conveying pressure of 1.5 MPa.

[0063] Embodiment 2

[0064] Refer to Figure 1 、 Figure 3 、 Figure 4 AndFigure 5 As shown in the figure, a rapid plugging device for grouting of advanced small pipes with foaming expansion is applied to the rapid plugging of advanced small pipe grouting. It includes an advanced small pipe 1. A latex film 2 is pasted at the front end of the tail of the advanced small pipe 1. It is a high-elastic latex film. The latex film 2 is connected to a foaming gun 4 through a foaming material injection pipe 3. The advanced small pipe 1 passes through a steel arch 5, and the tail end is connected to a check valve 6. The check valve 6 is connected to a grouting pipe 8 through a quick connector 7. The grouting pipe 8 is connected to a grouting pump 9.

[0065] In this embodiment, the advanced small pipe 1 is made of cold-rolled seamless steel pipe, with a wall thickness of 3.5 mm, a diameter of 42 mm, a single length of 3.5 m, an external insertion angle of 10° - 15°, and the longitudinal overlapping length of adjacent two rows of small pipes is not less than 1 m.

[0066] In this embodiment, the latex film 2 is made of high-elastic latex, with an elongation rate within 900%, a tensile strength of 30 Mpa, in a circular ring shape. There is a foaming material injection pipe 3 on the circular ring, which is connected to the foaming gun 4 through the foaming material injection pipe 3. The high-elastic latex film has high elasticity, is used to receive the injection of foaming material, can produce uneven deformation, and after the foaming material expands, the high-elastic latex film can be completely attached to the boundary of the drilled surrounding rock, filling the gap between the advanced small pipe and the hole wall of the drill hole, playing a role in plugging the grouting slurry.

[0067] In this embodiment, the foaming material injection pipe 3 and the high-elastic latex film 2 are integrated and made of high-elastic latex. After the injection of the foaming material is completed, the foaming material injection pipe is tied in a knot to prevent the foaming material from flowing back.

[0068] In this embodiment, the foaming material is polyurethane foam, with uniform foaming, capable of rapid curing, and having a dense pore structure after curing, with good plugging effect.

[0069] In this embodiment, the front-end opening diameter of the check valve 6 is slightly larger than the tail-end opening diameter of the advanced small pipe 1. A manual regulating valve is further installed, and the flow rate and pressure of the grouting slurry are adjusted through the handle of the manual regulating valve. After the grouting is completed, the manual regulating valve is closed to further prevent the grouting slurry from flowing back.

[0070] In this embodiment, both ends of the connector 7 are metal threads, and the middle is a rubber tube, which is connected to the check valve or the manual regulating valve and the grouting pipe through threads. The connector can achieve rapid assembly and disassembly, improving work efficiency.

[0071] In this embodiment, both ends of the grouting pipe 8 are metal threads, and the middle is a high-pressure-resistant rubber tube, which is connected to the quick connector and the grouting pump through threads.

[0072] In this embodiment, the grouting pump 9 is a single-cylinder piston type, with an external dimension of 1250 mm in length, 430 mm in width, 850 mm in height, a total machine weight of 250 kg, and a maximum conveying pressure of 1.5 MPa.

[0073] When adopting the solution provided by this embodiment, first measure and locate the position of the grouting of the advanced small conduit. A number of holes are drilled in the steel support with a pneumatic drill, and then the holes are cleaned. The advanced small conduit is inserted into the drilled holes, and a check valve, a joint and a grouting pipe are installed, and then grouting is carried out. Before grouting, the foaming material is injected into the high-elastic latex film through the foaming material injection pipe by a foaming gun. After the foaming material is completely cured, the foaming material injection pipe is tied in a knot to complete the rapid plugging of the grouting.

[0074] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those skilled in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several equivalent substitutions or obvious variations can still be made, and as long as the performance or use is the same, they should all be regarded as belonging to the protection scope of the present utility model.

Claims

1. A foaming expansion type advanced small pipe grouting rapid plugging device, characterized in that include: An advance small guide tube (1) is inserted into a borehole opened in the surrounding rock wall; The latex membrane (2) is in the shape of a ring and has a hollow cavity structure. A filling hole is provided on the latex membrane. The latex membrane (2) is sleeved on the advance small guide tube (1) and is located in a borehole close to the surrounding rock wall. A foaming material injection tube (3), one end of which is connected to the filling hole of the latex film (2); A foaming gun (4) is installed at the other end of the foaming material injection pipe (3).

2. According to claim 1, the foaming expansion type advanced small pipe grouting rapid plugging device is characterized in that Also includes: A check valve (6) whose outlet end is installed at the end of the leading small guide tube (1) extending out of the drill hole; A connector (7) installed at the inlet end of the check valve (6); A grouting pipe (8) connected to the joint (7); A grouting pump (9) is connected to the grouting pipe (8).

3. The foaming expansion type advanced small pipe grouting rapid plugging device according to claim 1 is characterized in that One end of the advance small conduit (1) extends out of the drill hole and passes through the steel arch frame (5); the advance small conduit (1) is made of cold-rolled seamless steel pipe with a wall thickness of 3.5 mm, a diameter of 42 mm, a single length of 3.5 m, an external insertion angle of 10° to 15°, and the longitudinal overlap length of two adjacent rows of advance small conduits (1) is not less than 1 m.

4. The foaming expansion type advanced small conduit grouting rapid plugging device according to claim 1 is characterized in that The latex film (2) is made of high-elastic latex, with an elongation within 900% and a tensile strength of 30 MPa.

5. The foaming expansion type advanced small conduit grouting rapid plugging device according to claim 4 is characterized in that The foaming material injection tube (3) is made of the same material as the latex film (2) and is integrally formed.

6. The foaming expansion type advanced small conduit grouting rapid plugging device according to claim 1 is characterized in that The foaming material in the foaming gun (4) is polyurethane foam.

7. The foaming expansion type advanced small pipe grouting rapid plugging device according to claim 2 is characterized in that The diameter of the front end opening of the check valve (6) is larger than the diameter of the protruding end opening of the leading small conduit (1), and the two are sleeve-fitted.

8. The foaming expansion type advanced small conduit grouting rapid plugging device according to claim 2 is characterized in that A manual regulating valve is installed between the check valve (6) and the connector (7).

9. The foaming expansion type advanced small conduit grouting rapid plugging device according to claim 2 is characterized in that The two ends of the joint (7) are metal threads, and the middle is a rubber tube, which is connected to the check valve (6) and the grouting pipe (8) by threaded connection; the two ends of the grouting pipe (8) are metal threads, and the middle is a high-pressure resistant rubber tube, which is connected to the joint (7) and the grouting pump (9) by threaded connection.

10. The foaming expansion type advanced small conduit grouting rapid plugging device according to claim 2 is characterized in that The grouting pump (9) is of single-cylinder piston type, with dimensions of 1250 mm in length, 430 mm in width, and 850 mm in height, a total weight of 250 kg, and a maximum delivery pressure of 1.5 MPa.

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