Sealing device for tube push bench to go in and out of hole

Abstract

The utility model discloses a sealing device for a tube push bench to go in and out of a hole, which belongs to the technical field of tube push benches and comprises an outer fixing sleeve, an inner fixing sleeve is fixedly connected to the end face of the outer fixing sleeve, an annular grouting groove is arranged on the end face of the outer fixing sleeve, and an annular slurry distributing groove is arranged on the end face of the inner fixing sleeve. And an inner cavity of the annular slurry distribution groove is communicated with an inner cavity of the annular slurry injection groove. According to the grouting sealing device, when grouting is conducted on gaps among the outer fixing sleeve, the inner wall of the inner fixing sleeve and the outer side face of the pipeline from the grouting opening, the annular grouting groove, the annular slurry distributing groove and the slurry distributing holes, air in the gaps is exhausted through the air outlet holes, the air collecting groove and the exhaust holes, the grouting sealing quality is guaranteed, cavities are avoided, and the sealing effect is improved. In addition, when the slurry is discharged from the air outlet hole, the air collecting groove and the exhaust hole, the annular slurry injection groove, the annular slurry distribution groove, the slurry distribution holes and the gaps are filled with the slurry, and the quality of grouting sealing is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of pipe jacking machine technology, and more specifically, to a sealing device for pipe jacking machine entering and exiting a tunnel. Background Technology

[0002] Pipe jacking machines are modern engineering construction equipment mainly used for trenchless underground municipal engineering projects. They can lay underground pipelines in complex environments such as highways, railways, rivers, surface buildings, and underground structures without excavating the surface. The entrance and exit of the pipe jacking machine need to be sealed.

[0003] A search revealed that utility model patent CN209780908U discloses a sealing device for entering and exiting a pipe jacking machine, comprising a device body and a pipe body. Both the device body and the pipe body are precast concrete ring-shaped structures. A fixing sleeve is provided at one end of the device body, and a fixing outer tube is provided inside the device body on one side of the fixing sleeve. A fixing inner tube is provided inside the device body on the inner side of the fixing outer tube, and an annular hollow groove is provided between the fixing inner tube and the fixing outer tube. A spiral rubber guide tube is spirally wound inside the annular hollow groove, and one end of the spiral rubber guide tube extends to the outside of the fixing sleeve and is provided with a rubber inlet. An annular rubber sealing ring is provided at the inner edge of the fixing sleeve, and a spiral rubber sealing ring is spirally wound on the inner side wall of the fixing inner tube. There are gap cavities between the spiral rubber sealing rings and between the annular rubber sealing rings and the spiral rubber sealing rings. This patent has high sealing performance, good effect, and is easy to use.

[0004] However, the aforementioned patents still have the following shortcomings: when grouting between the device body and the pipe body, air exists between them, and direct grouting makes it difficult to expel the air, easily forming cavities; furthermore, as the pipe is continuously laid, the annular rubber sealing ring will be constantly subjected to friction and wear, making it difficult to block subsequent grout or adhesive, thus affecting the smooth progress of grouting or adhesive injection. Therefore, we propose a sealing device for the entry and exit of a pipe jacking machine. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a sealing device for the entry and exit of a pipe jacking machine.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A sealing device for entering and exiting a pipe jacking machine includes an outer fixing sleeve, an inner fixing sleeve fixedly connected to the end face of the outer fixing sleeve, an annular grouting groove provided on the end face of the outer fixing sleeve, and an annular grout distribution groove provided on the end face of the inner fixing sleeve. The inner cavity of the annular grout distribution groove and the inner cavity of the annular grouting groove are connected. Multiple grout distribution holes are provided on the inner wall of the inner fixing sleeve, and the ends of the multiple grout distribution holes are connected to the inner cavity of the annular grout distribution groove. A grouting port is provided on the side of the outer fixing sleeve, and the inner cavity of the grouting port... The bottom end of the outer fixed sleeve is connected to the inner cavity of the annular grouting groove. An air-filling sealing mechanism is provided on the outer fixed sleeve. Pipes are fitted inside the inner cavities of the outer fixed sleeve and the inner fixed sleeve. An air-collecting groove is provided on the end face of the inner fixed sleeve. Multiple air outlets are provided on the inner wall of the inner fixed sleeve. The ends of the multiple air outlets are connected to the inner cavity of the air-collecting groove. An exhaust hole is provided on the outer side of the outer fixed sleeve. The end of the exhaust hole is connected to the end face of the outer fixed sleeve. The end of the exhaust hole is connected to the end of the air-collecting groove.

[0008] As a preferred embodiment of this utility model, the inflatable sealing mechanism includes an annular groove disposed on the inner wall of the outer fixed sleeve and a through hole disposed on the side of the outer fixed sleeve. An annular airbag is fixedly connected to the inner wall of the annular groove, and an air injection tube is fixedly connected to the side of the annular airbag. The end of the air injection tube extends through the through hole to the outside of the outer fixed sleeve and is fixedly connected to an internally threaded tube. An externally threaded plug is threaded onto the top of the internally threaded tube.

[0009] As a preferred embodiment of this utility model, the outer side of the inner fixing sleeve is fixedly connected with a plurality of reinforcing nails.

[0010] In a preferred embodiment of this utility model, the inner wall of the perforation is in contact with the side of the air injection tube.

[0011] In a preferred embodiment of this utility model, the two sides of the annular airbag are respectively fitted to the two sides of the annular groove cavity.

[0012] In a preferred embodiment of this utility model, the inner diameters of the outer fixing sleeve and the inner fixing sleeve are equal, and the inner diameters of the outer fixing sleeve and the inner fixing sleeve are larger than the outer diameter of the pipe.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] (1) In this utility model, when grout is injected from the grouting port, the annular grouting groove, the annular grouting groove and the grouting hole into the gap between the outer fixed sleeve, the inner wall of the inner fixed sleeve and the outer side of the pipe, the air in the gap is discharged by the air outlet, the air collection groove and the exhaust hole to ensure the quality of grouting and sealing and to avoid the formation of cavities. In addition, when grout is discharged from the air outlet, the air collection groove and the exhaust hole, it means that the annular grouting groove, the annular grouting groove, the grouting hole and the gap are filled with grout to ensure the quality of grouting and sealing.

[0015] (2) In this utility model, by using the annular groove, annular airbag, air injection pipe, internal threaded pipe and external threaded plug in combination, when the pipeline is laid, the annular airbag is located in the inner cavity of the annular groove. When grouting is required between the outer fixing sleeve, the inner fixing sleeve and the pipeline, air is injected into the inner cavity of the annular airbag through the air injection pipe and the internal threaded pipe, so that the annular airbag expands and seals between the outer fixing sleeve and the pipeline, preventing the grout from overflowing from the gap between the outer fixing sleeve and the pipeline, ensuring the quality of grouting and sealing, and having good practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the external fixing sleeve of this utility model;

[0018] Figure 3 This is a cross-sectional schematic diagram of the external fixing sleeve of this utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of the inner fixing sleeve of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the annular airbag of this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Outer fixing sleeve; 2. Inner fixing sleeve; 3. Annular grouting groove; 4. Annular grouting groove; 5. Grouting hole; 6. Inflatable sealing mechanism; 7. Grouting port; 8. Air collection groove; 9. Exhaust hole; 10. Air outlet; 11. Annular groove; 12. Perforation; 13. Annular airbag; 14. Air injection pipe; 15. Internally threaded pipe; 16. Externally threaded plug; 17. Pipe; 18. Reinforcing nail. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example:

[0027] Please see Figure 1-5 A sealing device for entering and exiting a pipe jacking machine includes an outer fixing sleeve 1, an inner fixing sleeve 2 fixedly connected to the end face of the outer fixing sleeve 1, an annular grouting groove 3 provided on the end face of the outer fixing sleeve 1, an annular grouting groove 4 provided on the end face of the inner fixing sleeve 2, the inner cavity of the annular grouting groove 4 communicating with the inner cavity of the annular grouting groove 3, a plurality of grouting holes 5 provided on the inner wall of the inner fixing sleeve 2, the ends of the plurality of grouting holes 5 communicating with the inner cavity of the annular grouting groove 4, and a grouting port 7 provided on the side of the outer fixing sleeve 1, the bottom of the inner cavity of the grouting port 7... The outer fixed sleeve 1 is connected to the inner cavity of the annular grouting groove 3. An air-filling sealing mechanism 6 is provided on the outer fixed sleeve 1. Pipes 17 are fitted into the inner cavities of the outer fixed sleeve 1 and the inner fixed sleeve 2. An air-collecting groove 8 is provided on the end face of the inner fixed sleeve 2. Multiple air outlets 10 are provided on the inner wall of the inner fixed sleeve 2. The ends of the multiple air outlets 10 are connected to the inner cavity of the air-collecting groove 8. An exhaust hole 9 is provided on the outer side of the outer fixed sleeve 1. The end of the exhaust hole 9 is connected to the end face of the outer fixed sleeve 1. The end of the exhaust hole 9 is connected to the end of the air-collecting groove 8.

[0028] In this embodiment, the outer fixing sleeve 1 and the inner fixing sleeve 2 can be prefabricated using concrete, and the outer fixing sleeve 1 and the inner fixing sleeve 2 can be connected by concrete mortar.

[0029] For details, please refer to Figures 1 to 5The inflation sealing mechanism 6 includes an annular groove 11 disposed on the inner wall of the outer fixing sleeve 1 and a through hole 12 disposed on the side of the outer fixing sleeve 1. An annular airbag 13 is fixedly connected to the inner wall of the annular groove 11. An air injection tube 14 is fixedly connected to the side of the annular airbag 13. The end of the air injection tube 14 extends through the through hole 12 to the outside of the outer fixing sleeve 1 and is fixedly connected to an internal threaded tube 15. An external threaded plug 16 is threadedly installed on the top of the internal threaded tube 15.

[0030] In this embodiment, the internal threaded tube 15 is sealed by the external threaded plug 16 to prevent the gas in the annular airbag 13 and the air injection tube 14 from escaping. At the same time, the annular airbag 13 can be inflated through the internal threaded tube 15 and the air injection tube 14.

[0031] For details, please refer to Figure 2 The outer side of the inner fixing sleeve 2 is fixedly connected with multiple reinforcing nails 18.

[0032] In this embodiment, the reinforcing nail 18 is used to ensure the stability of the inner fixing sleeve 2.

[0033] For details, please refer to Figures 3 to 5 The inner wall of the perforation 12 fits against the side of the air injection tube 14.

[0034] In this embodiment, the stability of the gas injection tube 14 within the perforation 12 is ensured.

[0035] For details, please refer to Figures 2 to 4 The two sides of the annular airbag 13 are respectively attached to the two sides of the inner cavity of the annular groove 11.

[0036] In this embodiment, the stability of the annular airbag 13 within the annular groove 11 is ensured.

[0037] For details, please refer to Figure 1 and Figure 2 The inner diameters of the outer fixing sleeve 1 and the inner fixing sleeve 2 are equal, and the inner diameters of the outer fixing sleeve 1 and the inner fixing sleeve 2 are greater than the outer diameter of the pipe 17.

[0038] In this embodiment, it is ensured that the laid pipe 17 can move smoothly in the outer fixing sleeve 1 and the inner fixing sleeve 2.

[0039] Working principle: In use, firstly, an outer fixing sleeve 1 and an inner fixing sleeve 2 are prefabricated, and the two inner fixing sleeves 2 are pre-embedded in the inner walls of the launching well and the receiving well. Then, the pipe jacking machine and multiple pipes 17 are passed through the outer fixing sleeve 1 and the inner fixing sleeve 2 to facilitate the laying of the pipes 17. After the pipes 17 are laid, one pipe 17 is located inside the outer fixing sleeve 1 and the inner fixing sleeve 2. At this point, the outer threaded plug 16 is removed, and air is inflated into the annular airbag 13 through the inner threaded pipe 15 and the air injection pipe 14 using an air pump or air cylinder. This causes the annular airbag 13 to expand, making the inner surface of the annular airbag 13 fit against the outer surface of the pipe 17. Finally, from... Grouting port 7 injects grout into the inner cavity of annular grouting groove 3. The grout first flows in annular grouting groove 3 and annular grouting groove 4, and then enters the gap between the inner wall of outer fixed sleeve 1, inner fixed sleeve 2 and outer side of pipe 17 through grouting hole 5, so as to seal the connection between outer fixed sleeve 1, inner fixed sleeve 2 and pipe 17. During the grouting process, the air in annular grouting groove 3, annular grouting groove 4 and gap is discharged from air outlet 10, air collection groove 8 and exhaust hole 9. When grout is discharged from air outlet 10, air collection groove 8 and exhaust hole 9, it means that the annular grouting groove 3, annular grouting groove 4, grouting hole 5 and gap are filled with grout.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A sealing device for entering and exiting a tunnel jacking machine, comprising an outer fixing sleeve (1), characterized in that: An inner fixing sleeve (2) is fixedly connected to the end face of the outer fixing sleeve (1). An annular grouting groove (3) is provided on the end face of the outer fixing sleeve (1), and an annular grouting groove (4) is provided on the end face of the inner fixing sleeve (2). The inner cavity of the annular grouting groove (4) is connected to the inner cavity of the annular grouting groove (3). A plurality of grouting holes (5) are provided on the inner wall of the inner fixing sleeve (2). The ends of the plurality of grouting holes (5) are connected to the inner cavity of the annular grouting groove (4). A grouting port (7) is provided on the side of the outer fixing sleeve (1). The bottom end of the inner cavity of the grouting port (7) is connected to the inner cavity of the annular grouting groove (3). The outer fixing sleeve (1) is provided with an inflation sealing mechanism (6). The inner cavity of the outer fixing sleeve (1) and the inner fixing sleeve (2) is provided with a pipe (17). The end face of the inner fixing sleeve (2) is provided with an air collection groove (8). The inner wall of the inner fixing sleeve (2) is provided with multiple air outlets (10). The ends of the multiple air outlets (10) are connected to the inner cavity of the air collection groove (8). The outer side of the outer fixing sleeve (1) is provided with an exhaust hole (9). The end of the exhaust hole (9) is connected to the end face of the outer fixing sleeve (1). The end of the exhaust hole (9) is connected to the end of the air collection groove (8).

2. The sealing device for entering and exiting a pipe jacking machine according to claim 1, characterized in that: The inflation sealing mechanism (6) includes an annular groove (11) on the inner wall of the outer fixed sleeve (1) and a through hole (12) on the side of the outer fixed sleeve (1). An annular airbag (13) is fixedly connected to the inner wall of the annular groove (11). An air injection tube (14) is fixedly connected to the side of the annular airbag (13). The end of the air injection tube (14) extends through the through hole (12) to the outside of the outer fixed sleeve (1) and is fixedly connected to an internal threaded tube (15). An external threaded plug (16) is threaded onto the top of the internal threaded tube (15).

3. A sealing device for entering and exiting a pipe jacking machine according to claim 1, characterized in that: The outer side of the inner fixing sleeve (2) is fixedly connected with multiple reinforcing nails (18).

4. A sealing device for entering and exiting a pipe jacking machine according to claim 2, characterized in that: The inner wall of the perforation (12) and the side of the air injection tube (14) are in contact.

5. A sealing device for entering and exiting a pipe jacking machine according to claim 2, characterized in that: The two sides of the annular airbag (13) are respectively attached to the two sides of the inner cavity of the annular groove (11).

6. A sealing device for entering and exiting a pipe jacking machine according to claim 1, characterized in that: The inner diameters of the outer fixing sleeve (1) and the inner fixing sleeve (2) are equal, and the inner diameters of the outer fixing sleeve (1) and the inner fixing sleeve (2) are greater than the outer diameter of the pipe (17).

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