Plastic plug of subway shield segment grouting pipe

Abstract

The utility model relates to the relevant technical field of grouting plugging, in particular to a subway shield segment grouting pipe plastic plug which comprises a grouting pipeline, a fixed circular ring plate is arranged in the grouting pipeline, a plurality of vertical rods are connected to the fixed circular ring plate in a penetrating mode, and the top ends of the vertical rods are connected with movable circular ring plates. The movable annular plate is connected with the top of the slurry discharging pipeline, a sealing disc is arranged above the slurry discharging pipeline, an elastic piece is arranged on the vertical rod to drive the top end of the slurry discharging pipeline to abut against the bottom end of the sealing disc, and during grouting, slurry extrudes the movable annular plate, so that the top end of the slurry discharging pipeline is separated from the sealing disc, the slurry discharging pipeline is communicated, and slurry injection is achieved through the slurry discharging pipeline. After slurry injection is finished, the slurry discharging pipeline moves upwards under the action of the elastic piece and is blocked through the sealing disc, the slurry is prevented from flowing back through the slurry discharging pipeline, and blocking is fast and effective.

Description

Technical Field

[0001] The utility model relates to the technical field related to grouting and plugging, in particular to a plastic plug for a grouting pipe of a subway shield segment. Background Art

[0002] As an important infrastructure of modern cities, subways are being constructed on a large scale in my country. Most subway tunnels use shield technology, and the tunnel lining is assembled from precast concrete segments. Pre-buried grooves are widely used in subways. When in use, the pre-buried grooves need to be fixed on the segment template in advance, and then mud is injected into the segment template.

[0003] The use of segment formwork requires grouting and sealing, but grouting difficulties are often encountered during the construction process, such as difficulty in sealing with single-liquid slurry, slurry overflow, and easy escape, bubbling, dripping, and leakage at the grouting port after sealing. The double-liquid slurry process is complicated, easy to block the pipe, and difficult to operate. For this reason, technical personnel in this field have proposed a plastic plug for the grouting pipe of the subway shield segment to solve the problems raised in the above background. Utility Model Content

[0004] The utility model aims to provide a plastic plug for a grouting pipe of a subway shield segment, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A plastic plug for a grouting pipe of a subway shield segment, comprising a grouting pipe, wherein the top of the grouting pipe is connected with a connecting flange, a sealing plate is arranged at the upper part of the inner cavity of the grouting pipe, the outer wall of the sealing plate is connected to the inner wall of the grouting pipe through a plurality of connecting rods evenly distributed about the circumference of the sealing plate, a fixed annular plate is arranged at the lower part of the inner cavity of the grouting pipe, the outer wall of the fixed annular plate is connected to the inner wall of the grouting pipe, a plurality of cylindrical holes are evenly distributed on the circumference of the fixed annular plate, and vertical holes are inserted and connected in the cylindrical holes Rod, the top ends of several vertical rods are commonly connected with a movable circular ring plate, the outer wall of the movable circular ring plate is slidably fitted with the inner wall of the grouting pipe, the upper part of the vertical rod is sleeved with an elastic member, the top end of the elastic member is abutted against the bottom end of the movable circular ring plate, the bottom end of the elastic member is abutted against the top end of the fixed circular ring plate, the inner periphery of the fixed circular ring plate is provided with a slurry discharge pipe, the top outer wall of the slurry discharge pipe is connected with the inner wall of the movable circular ring plate, and the top end of the slurry discharge pipe is abutted against the bottom end of the sealing plate under the action of the elastic member.

[0007] As a further solution of the utility model: the outer diameter of the sealing disk is consistent with the outer diameter of the slurry discharge pipe.

[0008] As a further solution of the utility model: the distance between the bottom end of the sealing plate and the bottom end of the grouting pipe is consistent with the length of the grouting pipe.

[0009] As a further solution of the utility model: the bottom end of the sealing disk is connected with a sealing plug, and the outer diameter of the sealing plug is consistent with the inner diameter of the slurry discharge pipe.

[0010] As a further solution of the utility model: an arc surface is provided at the bottom edge of the sealing plug.

[0011] As a further solution of the utility model: a diffusion component is arranged in the lower part of the inner cavity of the slurry discharge pipe, and the diffusion component includes a vertical column and a plurality of diffusion plates evenly distributed on the circumference and connected to the outer wall of the vertical column, and the end of the diffusion plate away from the vertical column is connected to the inner wall of the slurry discharge pipe.

[0012] The utility model has the following advantages: the plug realizes grouting through the cooperation of the grouting pipe and the grouting pipe. During grouting, the mud squeezes the movable annular plate, thereby driving the grouting pipe to move downward, so that the top of the grouting pipe is separated from the sealing plate, thereby making the grouting pipe conductive, and mud injection is realized through the grouting pipe. After the mud injection is completed, the grouting pipe will move upward under the action of the elastic part, and then the grouting pipe can be automatically blocked by the sealing plate to prevent the mud from flowing back through the grouting pipe. After the mud injection is completed, the grouting pipe will be recovered into the grouting pipe to reduce the contact between the grouting pipe and the mud layer. Compared with the traditional manual plug, the plug can realize automatic blocking, is more convenient and quick to use, has good blocking effect and low operation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the internal structure of the grouting pipeline in the blocked state in the embodiment of the utility model.

[0014] Figure 2 It is a schematic diagram of the internal structure of the grouting pipe in the open state in an embodiment of the utility model.

[0015] Figure 3 It is a schematic diagram of the structure of the fixed annular plate in the embodiment of the utility model.

[0016] Figure 4 It is a top view of the internal structure of the slurry discharge pipe in the embodiment of the utility model.

[0017] In the figure: 1. grouting pipe; 2. connecting flange; 3. connecting rod; 4. sealing plate; 5. slurry discharge pipe; 6. movable circular ring plate; 7. fixed circular ring plate; 8. cylindrical hole; 9. vertical rod; 10. elastic member; 11. diffusion assembly; 12. sealing plug; 13. arc surface; 14. vertical column; 15. diffusion plate. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described in detail below in conjunction with specific implementation methods.

[0019] Example 1: Please refer to Figures 1 to 3 A plastic plug for a grouting pipe of a subway shield segment comprises a grouting pipe 1, the top of the grouting pipe 1 is connected with a connecting flange 2, the grouting pipe 1 is connected with an external pipe for conveying mud through the connecting flange, a sealing plate 4 is arranged at the upper part of the inner cavity of the grouting pipe 1, the outer wall of the sealing plate 4 is connected to the inner wall of the grouting pipe 1 through a plurality of connecting rods 3 evenly distributed about the circumference of the sealing plate 4, a fixed annular plate 7 is arranged at the lower part of the inner cavity of the grouting pipe 1, the outer wall of the fixed annular plate 7 is connected to the inner wall of the grouting pipe 1, a plurality of cylindrical holes 8 are evenly distributed on the circumference of the fixed annular plate 7, and the cylindrical holes 8 is interlaced and connected with a vertical rod 9, and the top ends of several of the vertical rods 9 are commonly connected with a movable circular plate 6, and the outer wall of the movable circular plate 6 is slidingly fitted with the inner wall of the grouting pipe 1. An elastic member 10 is sleeved on the upper part of the vertical rod 9, and the top end of the elastic member 10 is abutted against the bottom end of the movable circular plate 6, and the bottom end of the elastic member 10 is abutted against the top end of the fixed circular plate 7. A slurry discharge pipe 5 is provided inside the fixed circular plate 7, and the outer wall of the top end of the slurry discharge pipe 5 is connected to the inner wall of the movable circular plate 6, and the top end of the slurry discharge pipe 5 is abutted against the bottom end of the sealing plate 4 under the action of the elastic member 10.

[0020] See also Figure 1 , Figure 2 The outer diameter of the sealing plate 4 is consistent with the outer diameter of the grouting pipe 5, so that the sealing plate 4 can fully block the top of the grouting pipe 5, and a distance is left between the outer wall of the sealing plate 4 and the inner wall of the grouting pipe 1 to facilitate mud transportation. The distance between the bottom end of the sealing plate 4 and the bottom end of the grouting pipe 1 is consistent with the length of the grouting pipe 5, so that the grouting pipe 5 can be completely stored back into the grouting pipe 1 after the grouting is completed.

[0021] Example 2: See Figure 1 , Figure 2 On the basis of Example 1, the bottom end of the sealing disk 4 is connected to a sealing plug 12, and the outer diameter of the sealing plug 12 is consistent with the inner diameter of the slurry discharge pipe 5. In order to facilitate the rapid insertion of the bottom end of the sealing plug 12 into the top of the slurry discharge pipe 5, an arc surface 13 is provided at the bottom edge of the sealing plug 12, and the sealing effect of the sealing disk 4 is enhanced by the sealing plug 12.

[0022] See also Figures 1 to 4A diffusion component 11 is provided at the lower part of the inner cavity of the slurry discharge pipe 5. The diffusion component 11 includes a vertical column 14 and a plurality of diffusion plates 15 evenly distributed on the circumference and connected to the outer wall of the vertical column 14. The end of the diffusion plate 15 away from the vertical column 14 is connected to the inner wall of the slurry discharge pipe 5. When the mud is injected, it is diffused through the diffusion plate 15 to prevent the mud from having too strong an impact force.

[0023] Working principle: After the grouting pipe 1 is connected to the external pipe for conveying mud, mud is conveyed into the grouting pipe 1 to start grouting. The mud impacts and squeezes the movable annular plate 6, thereby driving the movable annular plate 6 to move downward, so that the top of the slurry discharge pipe 5 is separated from the plug 12. At this time, the mud can enter through the top of the slurry discharge pipe 5 and be discharged downward into the pipe segment template. After the grouting is completed, the movable annular plate 6 is driven upward by the elastic member 10, thereby driving the top of the slurry discharge pipe 5 to re-dock with the plug 12, and the slurry discharge pipe 5 is quickly blocked by the sealing plate 4.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A plastic plug for a subway shield segment grouting pipe, comprising a grouting pipe, the top of which is connected to a connecting flange, characterized in that: The top end of the vertical rod is connected with the bottom end of the vertical rod, and the top of the vertical rod is connected with the bottom end of the vertical rod, and the top of the vertical rod is connected with the bottom end of the vertical rod. The vertical rod has an elastic member on the upper part of the vertical rod, and the top end of the elastic member is abutted against the bottom end of the movable circular plate, and the bottom end of the elastic member is abutted against the top end of the fixed circular plate. A slurry discharge pipe is provided on the inner periphery of the fixed circular plate, and the top outer wall of the slurry discharge pipe is connected with the inner wall of the movable circular plate, and the top end of the slurry discharge pipe abuts against the bottom end of the sealing disk under the action of the elastic member.

2. A plastic plug for grouting pipe of subway shield segment according to claim 1, characterized in that: The outer diameter of the sealing disk is consistent with the outer diameter of the slurry discharge pipe.

3. A plastic plug for grouting pipe of subway shield segment according to claim 2, characterized in that: The distance between the bottom end of the sealing plate and the bottom end of the grouting pipe is consistent with the length of the grouting pipe.

4. A plastic plug for grouting pipe of subway shield segment according to claim 1, characterized in that: The bottom end of the sealing disk is connected with a sealing plug, and the outer diameter of the sealing plug is consistent with the inner diameter of the slurry discharge pipe.

5. A plastic plug for grouting pipe of subway shield segment according to claim 4, characterized in that: The bottom edge of the sealing plug is provided with an arc surface.

6. The plastic plug for the grouting pipe of subway shield segment according to claim 1 is characterized in that: A diffusion component is arranged at the lower part of the inner cavity of the slurry discharge pipe, and the diffusion component comprises a vertical column and a plurality of diffusion plates evenly distributed around the circumference and connected to the outer wall of the vertical column, and one end of the diffusion plate away from the vertical column is connected to the inner wall of the slurry discharge pipe.

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