Metro tunnel wall thickness grouting device

Abstract

The utility model discloses a subway tunnel wall thickness grouting device, which relates to the technical field of subway tunnel machinery, comprises a grouting anchor rod body and a grouting assembly arranged on the grouting anchor rod body, and is characterized by further comprising a connecting pipe, the diameter of the connecting pipe corresponds to that of the grouting anchor rod body, and the connecting pipe is fixedly arranged at the top end of the grouting anchor rod body; the bottom end of the connector is movably inserted into the top of the connecting pipe; the air bag is arranged at the joint of the connecting pipe and the connector in a wrapping and sleeving manner and used for sealing; by pushing and pulling the sliding rod, the sliding rod and the piston can slide in the cavity in a reciprocating mode, in the process, external air can be sucked into the cavity through the one-way air inlet valve, then the air can be conveyed into the air bag through the one-way air outlet valve and the corrugated pipe, and the air bag is inflated and expanded to tightly abut against the connecting position of the connecting pipe and the connector for sealing. And when the air bag is subjected to thermal expansion, the sealing performance can be further improved, and when the air bag is subjected to cold contraction, the air bag is continuously inflated, so that the sealing effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to subway tunnel mechanical technical field, concretely is subway tunnel wall thickness grouting device. BACKGROUND

[0002] The subway tunnel is the engineering building that is buried in the stratum, and is the building that lays the railway or constructs the highway for the motor vehicle to pass, is a form that human utilizes the underground space. And the subway tunnel is generally the round tunnel top, and the tunnel construction will use the grouting device to carry out the grouting reinforcement to the inner wall structure of the tunnel and improve the thickness, and the main tool used is the wall thickness grouting anchor rod, the joint of the grouting anchor rod is connected with the grouting equipment, and then the grouting of the inner wall of the tunnel is realized.

[0003] In order to facilitate the disassembly of the joint, the existing wall thickness grouting anchor rod is usually connected using a threaded structure, which not only connects and fastens, but also facilitates operation, bringing great convenience to installers. In order to improve the sealing performance of the grouting anchor rod and the joint after threaded connection, a sealing ring is usually arranged at the connection between the grouting anchor rod and the structure, which has a certain sealing effect. However, the sealing ring is usually made of rubber, and is affected by thermal expansion and cold contraction in winter and hot expansion in summer, which is prone to damage and affects the sealing performance of the sealing ring. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a subway tunnel wall thickness grouting device to solve the problems in the background art.

[0005] To solve the above technical problems, the utility model provides a subway tunnel wall thickness grouting device, which comprises a grouting anchor rod body and a grouting assembly installed on the grouting anchor rod body, and further comprises,

[0006] A connecting pipe with a diameter corresponding to the grouting anchor rod body is fixedly installed at the top end of the grouting anchor rod body.

[0007] A joint is movably inserted into the top of the connecting pipe.

[0008] An air bag is wrapped around the connection between the connecting pipe and the joint for sealing.

[0009] A gas collecting member is fixedly wrapped around the connecting pipe, and one-way air inlet and outlet valves are arranged on one side of the top of the gas collecting member.

[0010] A cavity is formed in the gas collecting member and communicates with the one-way air inlet and outlet valves.

[0011] An inflation assembly is arranged in the gas collecting member for inflating and expanding the air bag.

[0012] Further, the inflation assembly comprises,

[0013] A piston is slidably installed in the cavity in a horizontal direction, and a slide rod is fixedly installed on the side away from the one-way air inlet valve, and the other end of the slide rod is slidably penetrated through the gas collecting member;

[0014] A bellows is fixedly inserted at the bottom of the air bag and the top of the gas collecting member respectively, and is used for conveying gas to the air bag.

[0015] Further, the inflating assembly further comprises a spring, which is movably sleeved on the slide rod in a horizontal direction, and the two ends of the spring are fixedly connected with the piston and the inner side wall of the cavity respectively.

[0016] Further, the inflating assembly further comprises a pull block, which is fixedly installed on the end of the slide rod away from the piston, and the outer surface of the pull block is provided with anti-skid lines.

[0017] Further, the inflating assembly further comprises a fixing block, which is fixedly installed on the bottom wall in the cavity, and the fixing block is abutted with the piston.

[0018] Further, the air bag is provided with a heat preservation layer and a wear-resistant layer fixedly installed on the side close to the connecting pipe.

[0019] Further, the air bag is further provided with a sealing plug, which is communicated with the inside of the air bag.

[0020] Further, the top of the inner ring of the connecting pipe is provided with an internal thread, and the bottom of the joint is integrally provided with a threaded pipe, which is threadedly inserted into the internal thread.

[0021] Further, the grouting assembly comprises a nut, a limiting sheet and a grouting plug, which are sequentially sleeved on the grouting anchor rod body from top to bottom, wherein the nut is threadedly sleeved on the grouting anchor rod body.

[0022] Compared with the prior art, the beneficial effects of the utility model are that: by pushing and pulling the slide rod, the slide rod and the piston can reciprocate in the cavity, in this process, the external air can be sucked into the cavity through the one-way air inlet valve, then the air can be conveyed into the air bag through the one-way air outlet valve and the bellows, so that the air bag is inflated and tightly sealed at the connecting position of the connecting pipe and the joint, when the air bag is hot and expanded, the sealing property can be further improved, when the air bag is cold and contracted, the air bag can be continuously inflated, and the sealing effect is improved.

[0023] Compared with the prior art, the beneficial effects of the utility model are that: by pulling out the sealing plug, the external air can enter the air bag, so that the air pressure inside and outside the air bag is balanced, the sealing of the connecting position of the connecting pipe and the joint can be conveniently released, by arranging the heat preservation layer, the influence of the external environment on the air bag can be reduced, by arranging the wear-resistant layer, the wear resistance of the inner wall of the air bag is improved, so that the problem of air bag rupture is reduced. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the front exterior of this utility model;

[0025] Figure 2 This is a three-dimensional structural schematic diagram showing a half-section view of the internal structure of the connecting pipe and connector of this utility model;

[0026] Figure 3 This is a three-dimensional structural diagram of the external side of this utility model;

[0027] Figure 4 This is a detailed structural diagram of the airbag of this utility model;

[0028] Figure 5 This is a three-dimensional structural schematic diagram of the internal half-section of the gas collecting component of this utility model.

[0029] In the diagram: 1. Grouting anchor body; 2. Connecting pipe; 3. Joint; 4. Airbag; 5. Air collection component; 6. One-way air inlet valve; 7. One-way exhaust valve; 8. Cavity; 9. Piston; 10. Sliding rod; 11. Spring; 12. Pull block; 13. Fixing block; 14. Nut; 15. Grout stop plug; 16. Sealing plug; 17. Internal thread; 18. Threaded pipe; 19. Insulation layer; 20. Wear-resistant layer; 21. Limiting plate; 22. Corrugated pipe. Detailed Implementation

[0030] Please see Figures 1-5 This utility model provides a technical solution: a grouting device for thick walls of subway tunnels, including a grouting anchor body 1 and a grouting assembly installed on the grouting anchor body 1, and further including...

[0031] The connecting pipe 2 has a diameter corresponding to that of the grouting anchor body 1 and is fixedly installed at the top of the grouting anchor body 1;

[0032] Connector 3, its bottom end is movably inserted into the top of connecting pipe 2;

[0033] The airbag 4 is wrapped around the connection between the connecting tube 2 and the connector 3 for sealing purposes;

[0034] The gas collecting component 5 is fixedly sleeved on the connecting pipe 2, and a one-way air inlet valve 6 and a one-way exhaust valve 7 are respectively provided on one side of the top.

[0035] Cavity 8 is opened inside the air collecting component 5 and is connected to one-way air intake valve 6 and one-way air exhaust valve 7;

[0036] An inflation assembly, located inside the air collection component 5, is used to inflate the airbag 4.

[0037] The inflation components include,

[0038] The piston 9 is slidably installed in the cavity 8 in the horizontal direction, and a sliding rod 10 is fixedly installed on the side away from the one-way air inlet valve 6, and the other end of the sliding rod 10 slidably penetrates the gas collecting member 5;

[0039] The corrugated pipe 22 is fixedly inserted into the bottom of the air bag 4 and the top of the gas collecting member 5 at both ends respectively, and is used for conveying gas to the air bag 4, and the inner thread 17 is arranged on the top of the inner circle of the connecting pipe 2, and the threaded pipe 18 is integrally formed on the bottom of the connector 3, and the threaded pipe 18 is threadedly inserted into the inner thread 17.

[0040] In specific implementation, first, the connector 3 drives the threaded pipe 18 to be screwed into the inner thread 17, then the air bag 4 is abutted against the connection between the connecting pipe 2 and the connector 3, and then the sliding rod 10 is pulled, so that the sliding rod 10 and the piston 9 reciprocate in the cavity 8, in this process, the external air can be sucked into the cavity 8 through the one-way air inlet valve 6, and then the air can be conveyed into the air bag 4 through the one-way air outlet valve 7 and the corrugated pipe 22, so that the air bag 4 is inflated and tightly sealed against the connection between the connecting pipe 2 and the connector 3, when the air bag 4 is hot and expanded, the sealing performance can be further improved, and when the air bag 4 is cold and contracted, the air bag 4 can be continuously inflated to improve the sealing effect.

[0041] In addition, it should be noted that the one-way air inlet valve 6 and the one-way air outlet valve 7 are both one-way air valves, also known as check valves or non-return valves, which are usually composed of a valve body, a valve piece and a valve film, and the principle is that when the air in the bag reaches a certain pressure due to the generation of gas by the objects sealed in the bag, the gas can push the air outlet valve piece outward or inward to discharge or enter the gas; when the pressure inside and outside the bag decreases to be insufficient to push open the valve piece, the valve is automatically closed. Since the one-way air inlet valve 6 and the one-way air outlet valve 7 are prior art, and also not the problem to be solved in the background of the present application, they will not be described in detail in the present application.

[0042] Referring to Figures 1-5 The inflation assembly further comprises a spring 11, which is movably sleeved on the sliding rod 10 in the horizontal direction, and the two ends of the spring 11 are fixedly connected with the piston 9 and the inner side wall of the cavity 8 respectively.

[0043] In specific implementation, by arranging the spring 11, the personnel only need to pull the sliding rod 10 when operating, and when the sliding rod 10 is released, the spring 11 will push the piston 9 back to the original position due to its own elastic force, thereby reducing the working intensity of the personnel.

[0044] Referring to Figures 1-5 The inflation assembly further comprises a pulling block 12, which is fixedly installed on the end of the sliding rod 10 away from the piston 9, and the outer surface of the pulling block 12 is provided with anti-skid lines.

[0045] In specific implementation, on the basis of the above implementation, by pulling the pull block 12, the pull block 12 can drive the sliding rod 10 to move. It should be noted that the volume of the pull block 12 is greater than that of the sliding rod 10, so that the force can be better applied when the person pulls the sliding rod 10. The anti-skid lines provided on the pull block 12 can increase the friction between the hands of the person and the pull block 12, thereby helping to solve the problem of slipping when the person pulls the pull block 12.

[0046] Referring to Figures 1-5 The inflation assembly further comprises a fixing block 13 fixedly installed on the bottom wall of the cavity 8, and the fixing block 13 is in abutment with the piston 9.

[0047] In specific implementation, on the basis of the above implementation, the sliding distance of the piston 9 can be limited to avoid the problem of damage to the one-way air inlet valve 6 when the piston 9 abuts against the one-way air inlet valve 6. The intact piston 9 can be ensured, and the problem of damaged piston 9 that cannot ensure the sealing sliding in the cavity 8 can be avoided.

[0048] Referring to Figures 1-5 The side of the air bag 4 close to the connecting pipe 2 is sequentially fixedly installed with a heat preservation layer 19 and a wear-resistant layer 20. By providing the heat preservation layer 19, the influence of the external environment on the air bag 4 can be reduced. By providing the wear-resistant layer 20, the wear resistance of the inner wall of the air bag 4 is improved, thereby reducing the problem of rupture of the air bag 4.

[0049] The air bag 4 is further provided with a sealing plug 16 in communication with the inside of the air bag 4. When the connection between the connecting pipe 2 and the connector 3 does not need to be sealed, the sealing plug 16 is pulled out, so that the external air enters the air bag 4, and the internal and external air pressures of the air bag 4 are balanced, thereby conveniently releasing the sealing of the connection between the connecting pipe 2 and the connector 3.

[0050] The grouting assembly comprises a nut 14, a limiting sheet 21 and a grouting plug 15, which are sequentially sleeved on the grouting anchor rod body 1 from top to bottom, wherein the nut 14 is threadedly sleeved on the grouting anchor rod body 1. The grouting anchor rod body 1 is inserted into the drilled hole until the limiting sheet 21 abuts against the wall. Then the nut 14 is rotated until the nut 14 abuts against the limiting sheet 21. Finally, the grout can be injected into the wall through the grouting anchor rod body 1. Since the grouting assembly is prior art and does not solve the problem in the background art of the present specification, it will not be described in detail in the present specification.

[0051] Working principle: before use, when the wall thickness in the subway tunnel needs to be grouted, first, the joint 3 drives the threaded pipe 18 to be screwed into the internal thread 17, then the air bag 4 is placed at the connection between the connecting pipe 2 and the joint 3, then the pull block 12 is pulled, so that the pull block 12 drives the slide rod 10 and the piston 9 to slide in the cavity 8 and compress the spring 11, so that the outside air is sucked into the cavity 8 through the one-way air inlet valve 6, then the pull block 12 is released, so that the spring 11 pushes the piston 9 back due to its own elastic force, at this time the air in the cavity 8 is also transported into the air bag 4 through the one-way air outlet valve 7 and the corrugated pipe 22, so that the air bag 4 is inflated and tightly sealed at the connection between the connecting pipe 2 and the joint 3, when the air bag 4 expands due to heat, the sealing performance can be further improved, when it shrinks due to cold, continue to inflate the air bag 4, the sealing effect is improved.

[0052] When the connection between the connecting pipe 2 and the joint 3 does not need to be sealed, pull out the sealing plug 16, so that the outside air enters the air bag 4, so that the air pressure inside and outside the air bag 4 is balanced, that is, the sealing of the connection between the connecting pipe 2 and the joint 3 can be conveniently released.

[0053] By arranging the heat preservation layer 19, the influence of the external environment on the air bag 4 can be reduced, and by arranging the wear-resistant layer 20, the wear resistance of the inner wall of the air bag 4 is improved, thereby reducing the problem of air bag 4 rupture.

[0054] When grouting is needed, first, the grouting anchor rod body 1 is inserted into the drilled hole until the limiting piece 21 abuts against the wall, then the nut 14 is rotated until the nut 14 abuts against the limiting piece 21, finally the slurry can be injected into the subway tunnel wall through the grouting anchor rod body 1.

[0055] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A grouting device for thick walls of a subway tunnel, comprising a grouting anchor body (1) and a grouting assembly installed on the grouting anchor body (1), characterized in that, It also includes a connecting pipe (2), the diameter of which corresponds to that of the grouting anchor body (1), and is fixedly installed at the top of the grouting anchor body (1); The connector (3) is movably inserted into the top of the connecting pipe (2) at its bottom end; An airbag (4) is wrapped around the connection between the connecting tube (2) and the connector (3) for sealing purposes; The gas collecting component (5) is fixedly sleeved on the connecting pipe (2), and a one-way air inlet valve (6) and a one-way exhaust valve (7) are respectively provided on one side of the top. The cavity (8) is located inside the gas collecting component (5) and is connected to the one-way inlet valve (6) and the one-way exhaust valve (7); An inflation assembly is installed inside the air collection component (5) and is used to inflate the airbag (4).

2. The grouting device for thick subway tunnel walls as described in claim 1, characterized in that: The inflation assembly includes a piston (9), which is slidably installed in the cavity (8) in the horizontal direction, and a slide rod (10) is fixedly installed on the side away from the one-way air inlet valve (6), and the other end of the slide rod (10) slides through the air collection member (5). The corrugated pipe (22) is fixedly inserted at both ends into the bottom of the airbag (4) and the top of the gas collection component (5) to deliver gas to the airbag (4).

3. The grouting device for thick subway tunnel walls as described in claim 2, characterized in that: The inflation assembly also includes a spring (11), which is movably sleeved on the slide rod (10) in the horizontal direction, and the two ends of the spring (11) are fixedly connected to the piston (9) and the inner wall of the cavity (8), respectively.

4. The grouting device for thick subway tunnel walls as described in claim 2, characterized in that: The inflation assembly also includes a pull block (12), which is fixedly installed on the end of the slide rod (10) away from the piston (9), and the outer surface of the pull block (12) is provided with anti-slip texture.

5. The grouting device for thick subway tunnel walls as described in claim 2, characterized in that: The inflation assembly also includes a fixing block (13), which is fixedly installed on the bottom wall of the cavity (8) and cooperates with the piston (9) to abut against each other.

6. The grouting device for thick subway tunnel walls as described in claim 1, characterized in that: The airbag (4) is fixedly installed with an insulation layer (19) and a wear-resistant layer (20) on the side near the connecting tube (2).

7. The grouting device for thick subway tunnel walls as described in claim 1, characterized in that: The airbag (4) is also provided with a sealing plug (16), which is connected to the inside of the airbag (4).

8. The grouting device for thick subway tunnel walls as described in claim 1, characterized in that: The top of the inner ring of the connecting pipe (2) is provided with an internal thread (17), and the bottom of the connector (3) is integrally formed with a threaded pipe (18), which is threadedly inserted into the internal thread (17).

9. The grouting device for thick subway tunnel walls as described in claim 1, characterized in that: The grouting assembly includes a nut (14), a limiting piece (21), and a grout stopper (15). The nut (14), the limiting piece (21), and the grout stopper (15) are sequentially fitted onto the grouting anchor body (1) from top to bottom. The nut (14) is threaded onto the grouting anchor body (1).

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