Advanced small guide pipe high-speed grouting device for tunnel

Abstract

The utility model belongs to the technical field of tunnel advance support grouting, and discloses an advance small guide pipe high-speed grouting device for a tunnel, which comprises a grout barrel, a grout pumping assembly and a quick connector, the quick connector comprises an outer sleeve ring, an inner grouting pipeline and a pipeline sealing assembly, the inner grouting pipeline is arranged in the outer sleeve ring, and the pipeline sealing assembly is arranged in the inner grouting pipeline. The outer sleeve ring is sleeved on the outer wall of the advanced small guide pipe, the inner grouting pipeline extends into the advanced small guide pipe, and a pipeline sealing assembly is arranged between the outer sleeve ring and the inner grouting pipeline. The structure design is compact and reasonable, the grouting pipeline can be quickly fixed on the advanced small guide pipe, thread sealing connection is not utilized, the mounting and dismounting speed is high, and the construction efficiency is high. Compared with a threaded tight joint structure, the pressure bearing capacity is high, the grouting speed can be greatly increased, grouting operation can be carried out on advanced small guide pipes of different sizes by replacing connectors of different sizes, use is convenient, practicability is high, the connecting and dismounting speed is high, and the advanced support construction efficiency can be greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel advance support grouting technical field, concretely is a kind of advance small catheter high-speed grouting device for tunnel. BACKGROUND

[0002] In the field of tunnel construction, advance small catheter grouting as a key advance support means plays an indispensable role in ensuring tunnel construction safety and stabilizing surrounding rock. Its principle is to fill the gaps in surrounding rock by injecting grout into surrounding rock, improving the integrity and stability of surrounding rock. However, the traditional tunnel advance small catheter grouting process has exposed many problems in practical application.

[0003] Currently, most tunnel advance small catheter grouting adopts tight grouting mode with threaded connection. This mode requires careful machining of external threads matched with connection joints at the tail of the advance small catheter. Although it seems like a routine operation, it has caused a series of difficult situations on the construction site. First, the operation process of threaded connection is extremely tedious, and the construction personnel need to spend a lot of time and effort to screw the joint, with extremely low efficiency. Under the requirement of time-saving tunnel construction progress, this undoubtedly seriously restricts the construction process. Second, the construction site environment is complex and poor, and pollutants are everywhere. The external threads of the advance small catheter are exposed to such an environment for a long time, and are easily contaminated with various pollutants. These pollutants attached to the threads not only increase the difficulty of screwing the joint, but also may cause thread wear, further affecting the tightness and reliability of the connection.

[0004] More importantly, when the grouting pressure is too large, the disadvantages of the traditional threaded connection mode will be infinitely magnified. Excessive grouting pressure is extremely easy to cause deformation of the thread of the external thread of the advance small catheter, and the corresponding internal thread of the joint is also difficult to escape. Once the thread is deformed, the connection of the joint with other advance small catheters will have problems, and cannot achieve tight and stable connection. This not only affects the normal progress of grouting operation, but also seriously affects the working efficiency of advance support, making the stability of surrounding rock cannot be effectively guaranteed, and laying a safety hazard for tunnel construction.

[0005] In view of the problems of low efficiency, easy pollution and poor pressure-bearing capacity of the traditional threaded connection grouting mode, it is urgent to develop a new type of tunnel advance small catheter high-speed grouting device. The tunnel advance small catheter high-speed grouting device is born in such a background, aiming to break through the limitations of traditional process and bring efficient and reliable grouting solution for tunnel construction. UTILITY MODEL CONTENT

[0006] (I) Technical problems solved

[0007] The tunnel advanced small catheter high-speed grouting device solves the problems of inconvenient small catheter grouting connection and difficult grouting pressure increase in the prior art.

[0008] (II) Technical solutions

[0009] To achieve the above-mentioned purposes, the utility model provides the following technical scheme: a tunnel advanced small catheter high-speed grouting device, which comprises a slurry barrel, a slurry pumping assembly and a quick connector, the quick connector comprises a sleeve ring, an internal grouting pipeline and a pipeline sealing assembly, the internal grouting pipeline is arranged in the sleeve ring, and the sleeve ring is sleeved on the outer wall of the advanced small catheter; the internal grouting pipeline extends into the advanced small catheter; the pipeline sealing assembly is arranged between the sleeve ring and the internal grouting pipeline; the side, away from the advanced small catheter, of the sleeve ring and the internal grouting pipeline is provided with a first flange plate; and the slurry pump pipe is provided with a second flange plate corresponding to the first flange plate.

[0010] Preferably, the advanced small catheter is provided with two groups of L-shaped lock openings.

[0011] Preferably, the pipeline sealing assembly comprises two groups of lock rods and lock rod lugs; the end of the sleeve ring is provided with two groups of lock rod lugs; the two groups of lock rod lugs are provided with two groups of lock rods; the two groups of lock rods are welded to the sleeve ring and the internal grouting pipeline; the advanced small catheter is clamped between the sleeve ring and the internal grouting pipeline; the two groups of lock rods are clamped in the L-shaped lock openings; and the end of the advanced small catheter is provided with an anti-disengagement assembly.

[0012] Preferably, the inner diameter of the sleeve ring is greater than the outer diameter of the advanced small catheter, and the outer diameter of the internal grouting pipeline is less than the inner diameter of the advanced small catheter.

[0013] Preferably, the anti-disengagement assembly comprises an inner top ring, a movable cavity, a sliding ring and a plurality of springs; the side, away from the advanced small catheter, of the sleeve ring and the internal grouting pipeline is provided with a thickened section; the thickened section is provided with the movable cavity; the sliding ring is slidably clamped in the movable cavity; the side of the sliding ring is provided with the inner top ring corresponding to the advanced small catheter; the end of the advanced small catheter abuts against the inner top ring; the side, away from the advanced small catheter, of the sliding ring is provided with the plurality of springs; one end of the spring abuts against the sliding ring; the other end of the spring abuts against the inner side wall of the movable cavity; and the sliding ring and the inner side wall of the movable cavity are provided with spring limiting grooves corresponding to the springs.

[0014] Preferably, a plurality of secondary anti-pollution discharge openings are formed in the advanced small catheter and the sleeve ring, and the secondary anti-pollution discharge openings are located between the inner top ring and the lock rods.

[0015] (III) Advantages

[0016] Compared with the prior art, the utility model provides a tunnel advanced small catheter high-speed grouting device, which has the following advantages

[0017] Advantages:

[0018] 1、The tunnel is provided with an outer sleeve ring, an inner grouting pipeline and a pipeline sealing assembly, and can quickly fix the grouting pipeline on the small advance pipe, without using threaded sealing, and has the advantages of fast installation and disassembly, high pressure bearing capacity, high grouting speed, replacement of different size joints, grouting operation on different size small advance pipes, convenient use, high practicability, fast connection and disassembly, and high advance support construction efficiency.

[0019] 2、The pipeline sealing assembly is provided with an L-shaped lock, which can firmly fix the inner grouting pipeline on the small advance pipe to complete the grouting operation, and the L-shaped lock is simpler and more convenient than the outer thread, has the advantages of fast connection and installation, simple and convenient disassembly, and high grouting operation construction efficiency.

[0020] 3、The secondary anti-pollution outlet is provided, a small amount of grout leakage is discharged from the L-shaped lock, and the grout away from the L-shaped lock can be discharged from the secondary anti-pollution outlet, which can avoid grout pollution caused by high-pressure grouting, and greatly improve the service life of the joint. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the quick connector and the grout pump pipe of the utility model;

[0022] Figure 2 It is a schematic diagram of the L-shaped lock and the lock rod of the utility model;

[0023] Figure 3 It is a schematic diagram of the quick connector of the utility model;

[0024] Figure 4 It is a schematic diagram of the quick connector of the utility model.

[0025] In the figure: 1, quick connector; 2, outer sleeve ring; 3, inner grouting pipeline; 4, pipeline sealing assembly; 5, first flange; 6, second flange; 7, L-shaped lock; 8, lock rod; 9, lock rod ear; 10, anti-falling assembly; 11, inner top ring; 12, movable cavity; 13, sliding ring; 14, spring; 15, spring limiting groove; 16, secondary anti-pollution outlet. DETAILED DESCRIPTION

[0026] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0027] Please refer to Figures 1-4 The present application provides a technical scheme:

[0028] The tunnel advance small catheter high-speed grouting device comprises a slurry barrel, a slurry pumping assembly and a quick connector 1. The quick connector 1 comprises a sleeve ring 2, an inner grouting pipeline 3 and a pipeline sealing assembly 4. The inner grouting pipeline 3 is arranged in the sleeve ring 2, and the sleeve ring 2 is sleeved on the outer wall of the advance small catheter. The inner grouting pipeline 3 extends into the advance small catheter. The pipeline sealing assembly 4 is arranged between the sleeve ring 2 and the inner grouting pipeline 3. The sleeve ring 2 and the inner grouting pipeline 3 are provided with a first flange plate 5 on the side away from the advance small catheter. The slurry pump pipe is provided with a second flange plate 6 corresponding to the first flange plate 5. The flange is used to connect the quick connector 1 and the slurry pump pipe, so that different types of quick connectors 1 can be replaced, and grouting operation can be performed on advance small catheters of multiple types.

[0029] Further, two groups of L-shaped locking openings 7 are arranged on the advance small catheter. The L-shaped locking opening 7 is processed in the shape of an axial long slot on the advance small catheter. A short slot along the circumferential direction of the pipe wall is arranged at the bottom of the long slot. A clamping groove is arranged at the end of the short slot. Compared with the external thread processed on the advance small catheter, the connection processing is simpler and more convenient, and the production efficiency can be effectively improved.

[0030] Further, the pipe sealing assembly 4 comprises two sets of locking rods 8 and locking rod ears 9, two sets of locking rod ears 9 are arranged at the end of the sleeve ring 2, two sets of locking rods 8 are arranged at the two sets of locking rod ears 9, and the two sets of locking rods 8 are welded and connected with the sleeve ring 2 and the inner grouting pipe 3. The advanced small catheter is clamped between the sleeve ring 2 and the inner grouting pipe 3, and the two sets of locking rods 8 are clamped in the L-shaped lock port 7. The end of the advanced small catheter is provided with a anti-falling assembly 10. When connected, the advanced small catheter is connected with the sleeve ring 2 and the inner grouting pipe 3 by inserting and connecting, so that the two sets of locking rods 8 are aligned with the L-shaped lock port 7. When the two sets of locking rods 8 are inserted into the bottom of the long strip-shaped gap, the device is rotated, so that the two sets of locking rods 8 are clamped at the end of the short strip-shaped gap. When grouting is performed, the inner grouting pipe 3 releases high-pressure slurry towards the advanced small catheter to hit the inner wall of the advanced small catheter and drive the connector to move away from the advanced small catheter. The two sets of locking rods 8 are clamped in the L-shaped lock port 7 and tightly resist the inner wall of the L-shaped lock port 7 along the pipe direction. The connection is very firm. When high-pressure grouting is performed, the greater the pressure, the tighter the connection, and the connection will not be loose. The structure is not easy to damage. At most, the L-shaped lock port 7 on the advanced small catheter is slightly deformed, which does not easily affect the damage of the quick connector 1. After holding pressure, the pressure in the pipe decreases. At this time, the quick connector 1 can be removed from the advanced small catheter for another catheter grouting.

[0031] Further, the inner diameter of the sleeve ring 2 is greater than the outer diameter of the advanced small catheter, and the outer diameter of the inner grouting pipe 3 is less than the inner diameter of the advanced small catheter. It is recommended that the inner diameter of the sleeve ring 2 is greater than the outer diameter of the advanced small catheter by 0.2-0.8mm, and the outer diameter of the inner grouting pipe 3 is less than the inner diameter of the advanced small catheter by 0.2-0.8mm. According to different sizes of the advanced small catheter, multiple corresponding size connectors are provided, and the connector can be replaced to perform grouting operation on multiple groups of advanced small catheters of different sizes.

[0032] Further, the anti-falling assembly 10 comprises an inner top ring 11, a movable cavity 12, a sliding ring 13, and multiple springs 14. The sleeve ring 2 and the inner grouting pipe 3 away from the advanced small catheter side are provided with a thickened section, the thickened section is provided with a movable cavity 12, the movable cavity 12 is slidably connected with a sliding ring 13, one side of the sliding ring 13 is provided with an inner top ring 11 corresponding to the advanced small catheter, and the end of the advanced small catheter abuts against the inner top ring 11. The side away from the advanced small catheter of the sliding ring 13 is provided with multiple springs 14, one end of the spring 14 abuts against the sliding ring 13, the other end of the spring 14 abuts against the inner side wall of the movable cavity 12, and the sliding ring 13 and the inner side wall of the movable cavity 12 are provided with spring limiting grooves 15 corresponding to the spring 14. The main function of the anti-falling assembly 10 is to facilitate connection and prevent the connector from falling off and being damaged in the initial connection. The spring force of the spring 14 does not need to be too strong, and it does not need to be excessively deformed during installation. The service life is relatively long.

[0033] Further, the advanced small catheter and the outer sleeve ring 2 are provided with a plurality of secondary anti-pollution outlets 16, and the secondary anti-pollution outlets 16 are located between the inner top ring 11 and the lock rod 8. The main purpose of the secondary anti-pollution outlet 16 is to prevent the slurry from flowing to the inner top ring 11 to pollute the anti-falling assembly 10. In actual use, the advanced small catheter cannot be completely matched with the quick connector 1, and when high-pressure grouting is performed, the pressure will drive the slurry to flow from various gaps. The slurry will inevitably flow and leak from the gap between the advanced small catheter and the inner grouting pipeline 3, and will be discharged from the L-shaped lock 7. The secondary anti-pollution outlet 16 facilitates the slurry to be discharged from the position away from the L-shaped lock 7.

[0034] Structural description:

[0035] Quick connector 1: The key component for connecting the advanced small catheter and the slurry pump pipeline in the device, which is composed of an outer sleeve ring 2, an inner grouting pipeline 3 and a pipeline sealing assembly 4, realizes quick installation and disassembly, and is convenient for grouting operation;

[0036] Outer sleeve ring 2: The annular structure sleeved on the outer wall of the advanced small catheter, which provides a mounting base for the inner grouting pipeline 3 and the pipeline sealing assembly 4, and plays a positioning and protection role;

[0037] Inner grouting pipeline 3: The pipeline deeply inserted into the advanced small catheter, which is a channel for slurry transportation, and introduces the slurry from the slurry pump pipeline into the advanced small catheter;

[0038] Pipeline sealing assembly 4: Including a lock rod 8 and a lock rod ear 9, which is used for tightly connecting the outer sleeve ring 2, the inner grouting pipeline 3 and the advanced small catheter, and ensuring the stability of the grouting process;

[0039] First flange plate 5: The flange provided on the side of the outer sleeve ring 2 and the inner grouting pipeline 3 away from the advanced small catheter, which cooperates with the second flange plate 6 to realize the detachable connection of the quick connector 1 and the slurry pump pipeline;

[0040] Second flange plate 6: Located on the slurry pump pipeline and corresponding to the first flange plate 5, which is connected through the flange to facilitate the replacement of different types of quick connectors 1;

[0041] L-shaped lock 7: A special structure processed on the advanced small catheter, which is in the shape of L and cooperates with the lock rod 8 in the pipeline sealing assembly 4 to realize quick and firm connection;

[0042] Lock rod 8: A part of the pipeline sealing assembly 4, which is welded with the outer sleeve ring 2 and the inner grouting pipeline 3, clamped into the L-shaped lock 7, and fixes the quick connector 1 and the advanced small catheter;

[0043] Lock rod ear 9: Installed at the end of the outer sleeve ring 2, which is used for fixing the lock rod 8 to enable the lock rod 8 to stably play a connecting role;

[0044] Anti-disconnection component 10: the structure to prevent the joint from falling off at the initial connection stage, composed of inner top ring 11, movable cavity 12, sliding ring 13 and multiple sets of springs 14, to ensure the safety of the connection;

[0045] Inner top ring 11: the component in anti-disconnection component 10 that contacts with the end of the advanced small catheter, to support and position the advanced small catheter and prevent it from shaking;

[0046] Movable cavity 12: the cavity opened in the thickened segment of outer sleeve ring 2 and inner grouting pipeline 3, to provide sliding space for sliding ring 13, and is an important component of anti-disconnection component 10;

[0047] Sliding ring 13: the component that slides in movable cavity 12, to connect inner top ring 11 and spring 14, to transfer the elastic force of spring 14, and to play the roles of buffering and anti-disconnection;

[0048] Spring 14: the elastic component in anti-disconnection component 10, to provide elastic force, so that sliding ring 13 can press the advanced small catheter tightly to prevent the joint from falling off;

[0049] Spring limiting groove 15: opened in the inner side wall of sliding ring 13 and movable cavity 12, to limit the position of spring 14 and ensure the normal work of spring 14;

[0050] Secondary anti-pollution outlet 16: the small hole opened in the advanced small catheter and outer sleeve ring 2, located between inner top ring 11 and lock rod 8, to discharge the leaked grout and prevent the anti-disconnection component 10 from being polluted

[0051] Working principle: During preparation, first select the appropriate quick connector 1 according to the size of the advanced small catheter. The quick connector 1 is composed of a sleeve ring 2, an internal grouting pipeline 3 and a pipeline sealing assembly 4. The inner diameter of the sleeve ring 2 is slightly larger than the outer diameter of the advanced small catheter (the recommended difference is 0.2-0.8mm), and the outer diameter of the internal grouting pipeline 3 is slightly smaller than the inner diameter of the advanced small catheter (the recommended difference is 0.2-0.8mm). This size design is convenient for installation and can guarantee the grouting effect. The sleeve ring 2 is sleeved on the outer wall of the advanced small catheter, and the internal grouting pipeline 3 is inserted into the advanced small catheter. The two are connected stably through the pipeline sealing assembly 4. When connecting the quick connector 1 and the grout pump pipe, the corresponding setting of the first flange plate 5 and the second flange plate 6 is used, and the flange connection method is adopted. This connection method is convenient for replacing different types of quick connectors 1, and thus realizes the grouting operation of various types of advanced small catheters. Two groups of L-shaped lock openings 7 are provided on the advanced small catheter. The shape is a long strip-shaped notch along the axial direction of the advanced small catheter, and a short strip-shaped notch along the circumferential direction of the pipe wall is provided at the bottom, and a clamping groove is provided at the end. During installation, the advanced small catheter is connected to the sleeve ring 2 and the internal grouting pipeline 3 by insertion, and the two groups of lock rods 8 are aligned with the L-shaped lock opening 7. After the two groups of lock rods 8 are inserted into the long strip-shaped notch at the bottom, the device is rotated, and the lock rod 8 is clamped at the end of the short strip-shaped notch. During the grouting operation, the internal grouting pipeline 3 releases high-pressure grout into the advanced small catheter, and the grout impacts the inner wall of the advanced small catheter, driving the connector to move away from the advanced small catheter. At this time, the two groups of lock rods 8 are clamped in the L-shaped lock opening 7 and are subjected to force along the pipeline direction, tightly pressing against the inner wall of the L-shaped lock opening 7. The greater the pressure, the tighter the connection, and there is no loosening phenomenon, and the structure is not easily damaged. At most, the L-shaped lock opening 7 is slightly deformed, which does not affect the use of the quick connector 1. During the initial grouting, the anti-dropping assembly 10 plays an important role. The anti-dropping assembly 10 includes an inner top ring 11, a movable cavity 12, a sliding ring 13 and multiple springs 14. The outer sleeve ring 2 and the internal grouting pipeline 3 have a thickened section on the side away from the advanced small catheter, and a movable cavity 12 is provided in the thickened section. The sliding ring 13 is slidably connected in the movable cavity, and the inner top ring 11 on one side of the sliding ring 13 abuts against the end of the advanced small catheter, and the other side has multiple springs 14. The ends of the springs 14 abut against the sliding ring 13 and the inner wall of the movable cavity 12, respectively. The spring force of the spring 14 is moderate, which can prevent the connector from falling off and being damaged during initial connection, and does not require excessive deformation, thereby prolonging the service life. During high-pressure grouting, the advanced small catheter and the quick connector 1 cannot be completely attached, and the grout will leak from the gap. Part of the grout flows through the gap between the advanced small catheter and the internal grouting pipeline 3 and is discharged from the L-shaped lock opening 7. The grout away from the L-shaped lock opening 7 is discharged through the multiple secondary anti-pollution openings 16 provided on the advanced small catheter and the sleeve ring 2, thereby preventing the grout from flowing to the anti-dropping assembly 10 and polluting the anti-dropping assembly 10, and ensuring the normal operation of each part of the device.After the pressure grouting is completed, the pressure in the pipeline is reduced, at this time, the quick connector 1 can be easily taken off from the advance small catheter, and the grouting operation of the next catheter is carried out, and the grouting construction of the tunnel advance small catheter is efficiently completed through the circulation.

[0052] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A kind of advance small catheter high-speed grouting device for tunnel, including slurry bucket, slurry pumping assembly and quick coupling (1), it is characterized by: The quick joint (1) comprises a sleeve ring (2), an inner grouting pipeline (3) and a pipeline sealing assembly (4), the inner grouting pipeline (3) is arranged in the sleeve ring (2), the sleeve ring (2) is sleeved on the outer wall of the advanced small catheter, the inner grouting pipeline (3) extends into the advanced small catheter, the pipeline sealing assembly (4) is arranged between the sleeve ring (2) and the inner grouting pipeline (3), the first flange plate (5) is arranged on the side, away from the advanced small catheter, of the sleeve ring (2) and the inner grouting pipeline (3), and the second flange plate (6) corresponding to the first flange plate (5) is arranged on the slurry pump pipeline.

2. The device according to claim 1, characterized in that it comprises: The advanced small catheter is provided with two groups of L-shaped locking openings (7).

3. The device according to claim 2, characterized in that it comprises: The pipeline sealing assembly (4) comprises two groups of locking rods (8) and locking rod ears (9), the two groups of locking rod ears (9) are arranged at the end of the sleeve ring (2), the two groups of locking rods (8) are arranged at the two groups of locking rod ears (9), the two groups of locking rods (8) are welded to the sleeve ring (2) and the inner grouting pipeline (3), the advanced small catheter is clamped between the sleeve ring (2) and the inner grouting pipeline (3), the two groups of locking rods (8) are clamped in the L-shaped locking openings (7), and the anti-disengagement assembly (10) is arranged at the end of the advanced small catheter.

4. The device according to claim 3, characterized in that it comprises: The inner diameter of the sleeve ring (2) is greater than the outer diameter of the advanced small catheter, and the outer diameter of the inner grouting pipeline (3) is less than the inner diameter of the advanced small catheter.

5. The device according to claim 3, characterized in that it comprises: The anti-disengagement assembly (10) comprises an inner top ring (11), a movable cavity (12), a sliding ring (13) and a plurality of springs (14), the side, away from the advanced small catheter, of the sleeve ring (2) and the inner grouting pipeline (3) is provided with a thickened section, the movable cavity (12) is formed in the thickened section, the sliding ring (13) is slidably clamped in the movable cavity (12), the inner top ring (11) corresponding to the advanced small catheter is arranged on one side of the sliding ring (13), the end of the advanced small catheter abuts against the inner top ring (11), the plurality of springs (14) are arranged on the side, away from the advanced small catheter, of the sliding ring (13), one end of the spring (14) abuts against the sliding ring (13), the other end of the spring (14) abuts against the inner side wall of the movable cavity (12), and the sliding ring (13) and the inner side wall of the movable cavity (12) are provided with spring limiting grooves (15) corresponding to the spring (14).

6. The device according to claim 5, characterized in that it comprises: A plurality of secondary anti-pollution discharge openings (16) are formed in the advanced small catheter and the sleeve ring (2), and the secondary anti-pollution discharge openings (16) are located between the inner top ring (11) and the locking rod (8).

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