Roadway surrounding rock grouting pipe

Abstract

The utility model relates to the technical field of surrounding rock grouting, in particular to a roadway surrounding rock grouting pipe which comprises a base pipe, an expansion assembly and a fixing plate. The expansion assembly comprises an expansion ring which is arranged between the material injection pipe and the fixed pipe and seals the air inflation cavity, an air inflation pipe inserted into the wall of the fixed pipe and a switching mechanism arranged in the air inflation pipe, and through the arrangement of the expansion ring, the diameter of the grouting pipe can be slightly smaller than that of the grouting channel, so that the grouting pipe can be quickly and conveniently inserted into the grouting channel; according to the grouting device, through arrangement of the gas injection pipe and the switch mechanism, the expansion ring expands, the expansion ring is attached to the inner wall of the grouting channel, the grouting channel is plugged, grout leakage of the grouting channel is avoided, the plugging effect is better, and through arrangement of the fixing plate and the connecting base, the position of the grouting pipe is fixed, and the situation that the grouting pipe is accidentally disengaged from the grouting channel during grouting is avoided.

Description

Technical Field

[0001] This utility model relates to the field of surrounding rock grouting technology, specifically a grouting pipe for roadway surrounding rock. Background Technology

[0002] The grouting pipe for roadway surrounding rock disclosed in CN205654359U includes a necked section for insertion into a grouting borehole, a hemp fiber section for sealing the gap between the grouting pipe and the inner wall of the grouting borehole to prevent grout leakage, and a threaded section for connection with a grouting machine hose; the necked section is located at the upper end of the grouting pipe, the threaded section is located at the lower end of the grouting pipe, a normal section is provided between the hemp fiber section and the threaded section, and the necked section narrows upward.

[0003] However, when using the aforementioned grouting pipe for roadway surrounding rock, the gap between the grouting pipe and the inner wall of the grouting borehole is sealed by hemp fiber segments. The diameter of the hemp fiber segments needs to be similar, and the surface of the hemp fiber segments is relatively rough. This results in greater friction when the grouting pipe is inserted into the grouting borehole, making it difficult to insert the grouting pipe into the grouting borehole and making it easy for it to get stuck in the grouting borehole. Utility Model Content

[0004] The purpose of this utility model is to provide a grouting pipe for roadway surrounding rock to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A grouting pipe for roadway surrounding rock, comprising:

[0007] A base tube is inserted into an injection tube, and a fixing tube is also sleeved on the base tube. An air-filling cavity is provided between the injection tube and the base tube, and between the fixing tube and the base tube.

[0008] An expansion assembly, comprising an expansion ring disposed between the injection tube and the fixed tube and sealing the inflation chamber, an inflation tube inserted into the wall of the fixed tube, and a switching mechanism disposed within the inflation tube;

[0009] A fixing plate is mounted on the fixing pipe. When the injection pipe is inserted into the grouting channel of the surrounding rock of the roadway, the fixing plate and the connecting seat mounted on the wall of the grouting channel are attached to each other, so that the fixing plate and the connecting seat are connected. Air is injected into the air chamber through the air inlet pipe, so that the airflow opens the switch mechanism and enters the air chamber, causing the expansion ring to expand and fit against the inner wall of the grouting channel, sealing the grouting channel. Grout is then introduced into the grouting channel through the base pipe into the injection pipe.

[0010] Preferably, the injection pipe has an injection hole.

[0011] Preferably, the switching mechanism includes a base plate disposed in the inflation tube, a guide rod inserted on the base plate, a sealing ball disposed on the guide rod, a sealing spring sleeved on the guide rod, and a sealing perforated plate disposed on the inflation tube.

[0012] Preferably, when gas is injected into the inflation tube, the airflow pushes open the sealing ball that is attached to the sealing orifice plate, allowing the airflow to pass through the substrate and enter the inflation chamber. Then, the sealing spring pushes the sealing ball to adhere to the sealing orifice plate to prevent gas leakage.

[0013] Preferably, the sealing ball is provided with a pressing rod, and pushing the pressing rod causes the sealing ball to leave the sealing hole plate, thereby expelling the gas in the inflation chamber.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention, through the setting of an expansion ring, allows the diameter of the grouting pipe to be slightly smaller than the diameter of the grouting channel, enabling the grouting pipe to be quickly and conveniently inserted into the grouting channel. It also provides an air injection pipe and a switching mechanism to cause the expansion ring to expand, allowing it to fit against the inner wall of the grouting channel and seal it, preventing grout leakage and improving the sealing effect. The fixing plate and connecting seat fix the position of the grouting pipe, preventing it from accidentally detaching from the grouting channel during grouting. Attached Figure Description

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

[0017] Figure 2 This is a schematic diagram of the structure of the air inflator of this utility model;

[0018] Figure 3 This is a cross-sectional view of the inflation tube of this utility model.

[0019] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the base tube and the fixing tube of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the present invention when the grouting channel is inserted;

[0022] Figure 7 for Figure 6 Enlarged schematic diagram of area A in the diagram.

[0023] In the diagram: 1. Base pipe; 2. Injection pipe; 3. Fixing pipe; 4. Inflation chamber; 5. Expansion ring; 6. Inflation pipe; 7. Fixing plate; 8. Connecting seat; 9. Grouting hole; 10. Base plate; 11. Guide rod; 12. Sealing ball; 13. Sealing spring; 14. Sealing hole plate; 15. Pressing rod; 16. Grouting channel. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 7 This utility model provides a technical solution:

[0026] A grouting pipe for roadway surrounding rock, comprising:

[0027] The base pipe 1 is inserted into the injection pipe 2 and is fixedly connected to the injection pipe 2 by welding or other means. A fixing pipe 3 is also sleeved on the base pipe 1 and is fixedly connected to the fixing pipe 3 by welding or other means. An air-filling cavity 4 is provided between the injection pipe 2 and the base pipe 1, and between the fixing pipe 3 and the base pipe 1. The injection pipe 2 and the fixing pipe 3 have the same diameter, and the ends with the cavities are separated by a gap on the base pipe 1. The actual length of this gap can be reasonably selected according to the actual situation. The end of the injection pipe 2 away from the base pipe 1 is provided with a grouting hole 9, so that the grout entering the injection pipe 2 is discharged from the grouting hole 9 and enters the grouting channel 16.

[0028] The expansion assembly includes an expansion ring 5, an inflation tube 6, a switching mechanism, and a pressing rod 15. The switching mechanism includes a base plate 10, a guide rod 11, a sealing ball 12, a sealing spring 13, and a sealing orifice plate 14. The expansion ring 5 is disposed between the injection tube 2 and the fixed tube 3 and seals the inflation chamber 4. The expansion ring 5 is fixedly connected to the injection tube 2 and the fixed tube 3 by means of adhesive bonding, etc., sealing the gap between the injection tube 2 and the fixed tube 3, thereby sealing the inflation chamber 4. The expansion ring 5 can be made of elastic materials such as rubber or silicone. The inflation tube 6 is inserted into the wall of the fixed tube 3 and is fixedly connected to the fixed tube 3 by means of welding, etc. The inflation tube 6 communicates with the inflation chamber 4. The base plate 10 is disposed in the inflation tube 6 and is fixedly connected to the inflation chamber 4 by means of welding, etc. The inner wall of the air tube 6 is fixedly connected. The guide rod 11 is inserted into the base plate 10 and is movably connected to the base plate 10. The sealing ball 12 is set on the guide rod 11 and is fixedly connected to the guide rod 11 by means of threaded connection or the like. The sealing spring 13 is sleeved on the guide rod 11. One end of the sealing spring 13 is fixedly connected to the base plate 10 by means of welding or the like, and the other end of the sealing spring 13 is fixedly connected to the sealing ball 12 by means of adhesive or the like. The sealing orifice plate 14 is set at the end of the air tube 6 and is fixedly connected to the air tube 6 by means of welding or the like. The sealing orifice plate 14 is provided with holes. The sealing ball 12 is provided with a pressing rod 15 and is fixedly connected to the sealing ball 12 by means of threaded connection or the like.

[0029] Fixed plate 7 is mounted on fixed pipe 3 and is fixedly connected to fixed pipe 3 by welding or other means. Grouting channel 16 is opened in the surrounding rock of the tunnel for grouting. Connecting seat 8 is set on the rock wall at the opening of grouting channel 16. Connecting seat 8 is fixedly connected to the rock wall by expansion bolts or other means. When grouting pipe 2 is inserted into grouting channel 16 in the surrounding rock of the tunnel, fixed plate 7 fits against connecting seat 8. Fixed plate 7 and connecting seat 8 are connected by bolts or other means. Air is injected into air chamber 4 through air inflator pipe 6. The airflow pushes open and fits the air chamber 4. The sealing ball 12 of the sealing orifice plate 14 allows airflow to pass through the base plate 10 and enter the inflation chamber 4, causing the expansion ring 5 to expand and adhere to the inner wall of the grouting channel 16, sealing the grouting channel 16. Grout is then introduced into the grouting channel 16 through the base pipe 1 and the injection pipe 2. After inflation is complete, the sealing spring 13 pushes the sealing ball 12 to adhere to the sealing orifice plate 14 to prevent gas leakage. After grouting is completed, the pressing rod 15 is pushed to make the sealing ball 12 leave the sealing orifice plate 14, expelling the gas in the inflation chamber 4 and preventing the expansion ring 5 from blocking the grouting channel 16.

[0030] Working principle: In use, after drilling the grouting channel 16 in the surrounding rock of the tunnel, the connecting seat 8 is fixed to the rock wall with expansion bolts. Then, the injection pipe 2 is inserted into the grouting channel 16, so that the fixing plate 7 fits against the connecting seat 8. The fixing plate 7 and the connecting seat 8 are connected by bolts. Then, air is injected into the air chamber 4 through the air inlet pipe 6. The airflow pushes open the sealing ball 12 that fits against the sealing hole plate 14, allowing the airflow to pass through the base plate 10 and enter the air chamber 4, causing the expansion ring 5 to expand and fit against the grouting channel. The inner wall of 16 seals the grouting channel 16. Grout is introduced into the grouting pipe 2 through the base pipe 1, thereby injecting it into the grouting channel 16. After inflation, the sealing spring 13 pushes the sealing ball 12 to fit against the sealing hole plate 14 to prevent gas leakage. After grouting is completed, the pressing rod 15 is pushed to make the sealing ball 12 leave the sealing hole plate 14, expelling the gas in the inflation chamber 4, so that the expansion ring 5 no longer blocks the grouting channel 16. Then the bolts on the fixing plate 7 are unscrewed, and the grouting pipe 2 is taken out.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grouting pipe for roadway surrounding rock, characterized in that, include: A base tube is inserted into an injection tube, and a fixing tube is also sleeved on the base tube. An air-filling cavity is provided between the injection tube and the base tube, and between the fixing tube and the base tube. An expansion assembly, comprising an expansion ring disposed between the injection tube and the fixed tube and sealing the inflation chamber, an inflation tube inserted into the wall of the fixed tube, and a switching mechanism disposed within the inflation tube; A fixing plate is mounted on the fixing pipe. When the injection pipe is inserted into the grouting channel of the surrounding rock of the roadway, the fixing plate and the connecting seat mounted on the wall of the grouting channel are attached to each other, so that the fixing plate and the connecting seat are connected. Air is injected into the air chamber through the air inlet pipe, so that the airflow opens the switch mechanism and enters the air chamber, causing the expansion ring to expand and fit against the inner wall of the grouting channel, sealing the grouting channel. Grout is then introduced into the grouting channel through the base pipe into the injection pipe.

2. The grouting pipe for roadway surrounding rock according to claim 1, characterized in that: The injection pipe is provided with an injection hole.

3. A grouting pipe for roadway surrounding rock according to claim 2, characterized in that: The switching mechanism includes a base plate disposed in the inflation tube, a guide rod inserted on the base plate, a sealing ball disposed on the guide rod, a sealing spring sleeved on the guide rod, and a sealing hole plate disposed on the inflation tube.

4. A grouting pipe for roadway surrounding rock according to claim 3, characterized in that: When gas is introduced into the inflation tube, the airflow pushes open the sealing ball that is attached to the sealing orifice plate, allowing the airflow to pass through the substrate and enter the inflation chamber. Then, the sealing spring pushes the sealing ball to adhere to the sealing orifice plate to prevent gas leakage.

5. A grouting pipe for roadway surrounding rock according to claim 4, characterized in that: The sealing ball is equipped with a pressing rod. Pushing the pressing rod causes the sealing ball to leave the sealing orifice plate, thereby expelling the gas from the inflation chamber.

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