Quick connector for grouting guide pipe

Abstract

The utility model provides a grouting guide pipe quick connector which comprises a fixing plate and a connecting clamping plate, a grouting guide pipe is arranged on the fixing plate, a limiting rubber gasket is sleeved outside the lower end of the grouting guide pipe, the outer diameter of the upper end of the limiting rubber gasket is larger than that of the lower end of the limiting rubber gasket, and a limiting hole is formed in the connecting clamping plate. The diameter of the limiting hole is larger than the outer diameter of the lower end of the limiting rubber gasket and smaller than the outer diameter of the upper end of the limiting rubber gasket, fixing structures are arranged on the fixing plate and the connecting clamping plate, the outer diameter of the lower end of the limiting rubber gasket is smaller than the diameter of the grouting pipe, and the diameter of the limiting hole is larger than that of the grouting pipe. The fixing plate and the connecting clamping plate are connected through the fixing structure, the limiting hole and the rubber gasket are fastened, the connecting clamping plate cannot move upwards, the connecting joint is installed at the position to be grouted, the grouting guide pipe is connected with the tunnel grouting pipe, and a gap between the limiting rubber gasket and the tunnel grouting pipe is gradually reduced. The lower end of the limiting rubber gasket is tightly attached to the inner wall of the grouting pipe, and leakage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel grouting related technical field, in particular to a grouting guide pipe quick connection joint. BACKGROUND

[0002] Grouting technology plays an important role in underground structure seepage prevention, foundation pit reinforcement, ground subsidence prevention, built structure foundation treatment and pipe jacking friction reduction, etc. For tunnel engineering, grouting has filling, reinforcement and seepage reduction effects, and the main purpose of tunnel grouting is to reinforce surrounding rock and ensure tunnel stability.

[0003] During high-pressure grouting, slurry leakage often occurs at threaded or flange connections, polluting the working environment, and the corrosiveness of chemical slurry (such as epoxy resin) can accelerate the aging of the sealing ring and exacerbate the risk of leakage. Moreover, traditional flange connections require multiple people to cooperate, and the bolt fastening process is time-consuming, which makes it difficult to operate in narrow spaces (such as small-section tunnels) and can easily lead to safety accidents. In addition, the compatibility is poor, and the sizes of grouting pipes from different manufacturers do not match, requiring custom-made conversion joints. SUMMARY

[0004] The utility model aims at providing a grouting guide pipe quick connection joint, which can quickly fix the grouting guide pipe and avoid leakage between the grouting guide pipe and the grouting pipe, has strong adaptability and is easy to operate.

[0005] To this end, the utility model adopts the technical scheme: a grouting guide pipe quick connection joint, comprising a fixed plate and a connecting clamping plate arranged at intervals, a grouting guide pipe for connecting a tunnel grouting pipe is arranged on the fixed plate, a limiting rubber gasket is sleeved on the lower end of the grouting guide pipe, the upper end outer diameter of the limiting rubber gasket is larger than the lower end outer diameter, a limiting hole for fixing the limiting rubber gasket is opened on the connecting clamping plate, the hole diameter of the limiting hole is larger than the lower end outer diameter of the limiting rubber gasket and smaller than the upper end outer diameter of the limiting rubber gasket, the fixed plate and the connecting clamping plate are connected through a fixed structure, the lower end outer diameter of the limiting rubber gasket is smaller than the hole diameter of the grouting pipe, and the hole diameter of the limiting hole is larger than the hole diameter of the grouting pipe.

[0006] As a preferred embodiment of the above scheme, the fixed structure comprises two fastening bolts arranged on the left side and the right side of the fixed plate, and screw holes for threadedly connecting with the fastening bolts are opened on the left side and the right side of the fixed plate and the connecting clamping plate.

[0007] Further preferably, the grouting guide pipe is made of galvanized alloy.

[0008] Further preferably, a thread is arranged on the upper end of the grouting guide pipe for connecting with a grouting machine.

[0009] Further preferably, the fixed plate and the connecting clamping plate are both square plates.

[0010] Further preferably, the four fastening bolts are arranged in a rectangular shape.

[0011] Further preferably, the limiting hole is in the shape of a truncated cone with a larger upper cross section than lower cross section.

[0012] The utility model discloses the beneficial effect that: through the limiting rubber washer of upper end outer diameter greater than lower end outer diameter connects the grouting pipe on the fixed plate and the connecting clamping plate, and the limiting hole aperture of connecting clamping plate is greater than lower end outer diameter of limiting rubber washer, and is less than upper end outer diameter, and the fixed plate and the connecting clamping plate are connected through the fixed structure, and limiting hole is fastened with rubber washer, and connecting clamping plate can not move upwards, installs the connecting joint at the grouting, and the grouting pipe is connected with the tunnel grouting pipe, and the gap between limiting rubber washer and the tunnel grouting pipe gradually reduces, until the lower end of limiting rubber washer and the inner wall of grouting pipe are closely combined, avoid the leakage. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0014] The utility model will be further described below in combination with the drawings and examples.

[0015] As Figure 1 The utility model discloses a grouting pipe quick connecting joint, including interval setting fixed plate 1 and connecting clamping plate 2, be provided with the grouting pipe 3 of being used for connecting tunnel grouting pipe 6 on fixed plate 1, and the grouting pipe 3 adopts galvanized alloy to be made. Fixed plate 1 and connecting clamping plate 2 all adopt square board, and four fastening bolts 5 are arranged in a rectangular shape.

[0016] Galvanized alloy refers to tunnel grouting special pipeline that carbon steel pipe is base material, and zinc-based alloy coating (such as Zn-Al-Mg, Zn-Ni etc.) is formed on the surface through hot-dip plating or electroplating process; Corrosion resistance is good, and the service life of new Zn-Al-Mg coating (patent EP202410234A1) is 15 years in the environment of PH 2~12, far more than 5~8 years of traditional galvanized pipe; The bonding strength of coating and matrix is greater than or equal to 15MPa (GB / T 13912-2025), and can withstand grouting pressure more than 10MPa; No chromium passivation process (RoHS2025 standard) prevents hexavalent chromium pollution.

[0017] The upper end of the grouting pipe 3 is provided with a thread for connecting with a grouting machine. The upper end of the grouting pipe 3 is connected with the grouting machine through the thread, which is more convenient for disassembly and replacement.

[0018] The lower end of the grouting pipe 3 is sleeved with a limiting rubber washer 4, the upper end of the limiting rubber washer 4 has a larger outer diameter than the lower end, the connecting clamping plate 2 is provided with limiting holes for fixing the limiting rubber washer 4, the limiting holes have a hole diameter larger than the outer diameter of the lower end of the limiting rubber washer 4 and smaller than the outer diameter of the upper end of the limiting rubber washer 4, the hole diameter of the limiting holes is larger than the inner diameter of the grouting pipe 6, so that the end of the grouting pipe 6 is located below the limiting rubber washer 4 after the grouting pipe 6 is sleeved on the limiting rubber washer 4. The limiting rubber washer 4 is used to connect the grouting pipe 3 and the grouting pipe 6, and the limiting rubber washer 4 is sleeved on the grouting pipe 3 and the grouting pipe 6 is sleeved on the limiting rubber washer 4, forming two-stage rubber sealing; at the same time, the grouting pressure can further improve the sealing performance in the high-pressure grouting process, so as to avoid leakage when the limiting rubber washer 4 is connected with the tunnel grouting pipe 6.

[0019] The limiting holes are in the shape of a circular truncated cone, the upper cross section is larger than the lower cross section, the contact area with the limiting rubber washer 4 is increased, and the stable connection of the limiting rubber washer 4 is ensured.

[0020] The size of the tunnel grouting pipe 6 is adjusted according to the strength of the rock stratum of the tunnel, the state of underground water, the grouting pressure level, the reinforcement range, the grouting requirements and external factors, and the size of the grouting pipe 3 and the limiting rubber washer 4 is also adjusted. The outer diameter of the upper end of the limiting rubber washer 4 is larger than the inner diameter of the tunnel grouting pipe 6, and the outer diameter of the lower end is smaller than the inner diameter of the tunnel grouting pipe 6, so that no gap is formed when the grouting pipe 3 is installed on the tunnel grouting pipe 6, and the slurry leakage is avoided.

[0021] The fixed plate 1 and the connecting clamping plate 2 are connected through a fixing structure. The fixing structure includes two fastening bolts 5 arranged on the left side and the right side of the fixed plate 1, the left side and the right side of the fixed plate 1 and the connecting clamping plate 2 are provided with threaded holes for threadedly connecting with the fastening bolts 5, the outer diameter of the lower end of the limiting rubber washer 4 is smaller than the hole diameter of the grouting pipe 6, and the outer diameter of the upper end is larger than the hole diameter of the grouting pipe 6. The two sides of the place to be grouted are provided with threaded holes connected with the fastening bolts 5, during installation, the fixed plate 1 and the connecting clamping plate 2 are aligned, the fastening bolts 5 are connected in the threaded holes of the place to be grouted after passing through the fixed plate 1 and the connecting clamping plate 2, and the fastening bolts 5 are tightened to connect the place to be grouted while reducing the distance between the fixed plate 1 and the connecting clamping plate 2, the connection joint is fixed, and then grouting is performed. The limiting holes are sleeved on the limiting rubber washer 4, and the fixed plate 1 is arranged on the end face of the limiting rubber washer 4, so that the limiting rubber washer 4 can be clamped and fixed, the stability of the limiting rubber washer 4 is ensured during high-pressure grouting, and the connection between the grouting pipe 3 and the grouting pipe 6 is further ensured to be reliable.

[0022] In the installation of the connecting joint, the grouting pipe 3 is passed through the fixing plate 1 from bottom to top, the upper end of the limiting rubber washer 4 is abutted against the lower surface of the fixing plate 1, then the connecting clamping plate 2 is connected on the limiting rubber washer 4 from bottom to top, the fixing plate 1 and the connecting clamping plate 2 are connected together through the fastening bolt 5, then the connecting joint is fixed at the place to be grouted and is fixed.

[0023] The grouting pipe 3 is connected on the fixing plate 1 and the connecting clamping plate 2 through the limiting rubber washer 4 with the upper end outer diameter larger than the lower end outer diameter, the limiting hole on the connecting clamping plate 2 has a hole diameter larger than the lower end outer diameter of the limiting rubber washer 4 and smaller than the upper end outer diameter, the fixing plate 1 and the connecting clamping plate 2 are connected through the fixing structure and are fastened between the limiting hole and the rubber washer, the connecting clamping plate 2 cannot move upward, the connecting joint is installed at the place to be grouted, the grouting pipe 3 is connected with the tunnel grouting pipe 6, the gap between the limiting rubber washer 4 and the tunnel grouting pipe 6 is gradually reduced until the lower end of the limiting rubber washer 4 is closely fitted with the inner wall of the grouting pipe 6, thereby avoiding leakage.

[0024] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, the scope of the utility model is defined by the claims and its equivalents.

Claims

1. A quick connect fitting for a grout injection conduit, characterized by: The utility model relates to a tunnel grouting pipe fixing device, which comprises fixed plates (1) and connecting clamping plates (2) arranged at intervals, the fixed plates (1) are provided with grouting pipes (3) for connecting tunnel grouting pipes (6), the lower end of the grouting pipes (3) is provided with a limiting rubber washer (4), the upper end of the limiting rubber washer (4) is larger in outer diameter than the lower end, the connecting clamping plates (2) are provided with limiting holes for fixing the limiting rubber washer (4), the limiting holes are larger in diameter than the lower end of the limiting rubber washer (4) and smaller in diameter than the upper end of the limiting rubber washer (4), the fixed plates (1) and the connecting clamping plates (2) are provided with fixing structures for fixing connecting joints, the lower end of the limiting rubber washer (4) is smaller in diameter than the grouting pipes (6), and the limiting holes are larger in diameter than the grouting pipes (6).

2. A quick connect fitting for a grouting conduit according to claim 1, characterized in that: The fixing structure comprises two fastening bolts (5) arranged on the left side and the right side of the fixed plates (1), and the left side and the right side of the fixed plates (1) and the connecting clamping plates (2) are provided with threaded holes corresponding to the fastening bolts (5) for threaded connection.

3. A quick connect fitting for a grouting catheter according to claim 1, characterized in that: The grouting pipes (3) are made of galvanized alloy.

4. The quick connect fitting of claim 1, wherein: The upper end of the grouting pipes (3) is provided with threads for connecting a grouting machine.

5. A quick connect fitting for a grouting catheter according to claim 2, characterized in that: The fixed plates (1) and the connecting clamping plates (2) are square plates.

6. A quick connect fitting for a grouting catheter according to claim 5, characterized in that: The four fastening bolts (5) are arranged in a rectangular shape.

7. A quick connect fitting for a grouting catheter according to claim 1, characterized in that: The limiting holes are in the shape of a circular truncated cone, and the upper cross section is larger than the lower cross section.

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