一种超前小导管

By setting a balloon structure at the tail end of the advanced small guide tube to achieve synchronous sealing of the grouting hole, the problems of difficult control of anchor adhesive thickness and uncontrollable curing time are solved, improving construction efficiency and grouting quality, and ensuring the effect of surrounding rock reinforcement.

CN224515195UActive Publication Date: 2026-07-17XUZHOU URBAN RAIL TRANSIT CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
XUZHOU URBAN RAIL TRANSIT CO LTD
Filing Date
2025-07-16
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing advanced small guide pipes require the use of anchoring adhesive to seal the orifice before grouting, making it difficult to accurately control the adhesive thickness, and the curing time of the anchoring adhesive is uncontrollable, affecting construction efficiency and quality.

Method used

A balloon structure is used to seal the grouting hole at the tail end of the pipe. The grout inside the balloon expands and seals synchronously. Combined with the integral molding of the grout inside and outside the pipe, the use of anchoring adhesive is avoided, and the construction cycle is shortened.

Benefits of technology

It achieves synchronous sealing without anchoring adhesive, improves construction efficiency and grouting quality, ensures the reinforcement effect of surrounding rock, and enhances structural safety.

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    Figure CN224515195U_ABST
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Abstract

本实用新型涉及一种超前小导管，包括管体和球囊，管体前端和尾端的外壁上均开设有出液孔，管体前端插入围岩的注浆孔内，管体尾端外壁与外部的导向拱架固定套接，管体尾端的出液孔外密封罩设有球囊，球囊靠近管体前端的囊壁上开设有漏液孔；管体尾端与外部截止阀、注浆机对接。本实用新型的有益效果是：通过在管体尾端设置球囊，使注浆时能同步对注浆孔的孔口进行密封，无需使用锚固胶进行密封，节省施工周期，且球囊的尺寸提前设置好，能够以合理的厚度对注浆孔的孔口进行封堵；球囊内的浆体、管体内的浆体和注浆孔内的浆体同步固化，一体成型，结构强度高，密封效果好。
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Claims

1. A leading mini-catheter, characterized in that, The tube (1) includes a pipe body (1) and a balloon (2). The outer walls of the front and rear ends of the pipe body (1) are provided with liquid outlet holes (11). The front end of the pipe body (1) is inserted into the grouting hole (41) of the surrounding rock (4). The outer wall of the rear end of the pipe body (1) is fixedly sleeved with an external guide arch (3). The balloon (2) is provided with a sealing cover on the outer wall of the liquid outlet hole (11) at the rear end of the pipe body (1). The balloon (2) is provided with a leakage hole (21) on the wall of the balloon (2) near the front end of the pipe body (1). The rear end of the pipe body (1) is connected to an external shut-off valve and a grouting machine.

2. The super small catheter according to claim 1, wherein The outer wall of the front and rear ends of the tube (1) is provided with a number of liquid outlet holes (11) arranged in a circular array. The number of liquid outlet holes (11) at the rear end of the tube (1) is greater than the number of liquid outlet holes (11) at the front end of the tube (1).

3. The super-small catheter according to claim 2, wherein, The front end of the tube (1) is conical, and a cross-shaped liquid outlet groove (12) is provided on the side wall.

4. The super small catheter according to claim 1, wherein, The balloon (2) has a rubber layer as its wall.

5. The super-lead catheter according to any one of claims 1 to 4, wherein, The tube body (1) is made of cast iron.