Grouting pipe joint of subway segment

Abstract

The utility model provides a subway segment grouting pipe joint, which belongs to the technical field of constructional engineering, and comprises a joint pipe and a first external thread arranged at the end part of the joint pipe, the first external thread can be screwed in a threaded hole on a segment, and one end of the joint pipe far away from the first external thread is also provided with a second external thread. The blank cap or the ball valve can be screwed on the joint pipe through the second external thread; according to the utility model, the drill holes in the duct piece can be repeatedly used through the joint pipe, so that the duct piece does not need to be re-drilled during emergency repair or maintenance work, the working efficiency can be improved, and the influence on the structural strength of the duct piece can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of construction engineering equipment, and specifically relates to a subway segment grouting pipe joint. BACKGROUND

[0002] With the accelerating pace of urbanization, as the artery of modern urban transportation network, the safety and reliability of subway system have become the focus of attention of city managers and the general public. Subway tunnels, especially those that have been in operation for many years, often expose a variety of diseases after a long period of use and environmental factors (such as groundwater erosion, soil pressure changes, etc.). These diseases mainly include but are not limited to water leakage of concrete segments, displacement deformation of tunnel structure, and generation of cracks, etc. These diseases not only directly affect the smooth operation of subway trains, but also may pose a potential threat to the safety of passengers, so the maintenance and repair of subway tunnels are particularly important.

[0003] In the existing subway segment grouting repair technology, a common practice is to use drilling equipment to accurately drill threaded holes on the concrete segments, then insert special grouting pipes into these threaded holes, and install ball valves at the end of the pipes to control the grouting process. Grouting operations are usually completed by a drilling and grouting machine, which can accurately inject repair materials such as cement slurry or chemical slurry into the segment through the ball valve to fill cracks or block leakage points. After grouting is completed, the ball valve will be removed and replaced with a cap to close the threaded hole, prevent slurry from flowing out and keep the tunnel clean.

[0004] However, this traditional method has a significant problem: after the cap is installed, the slurry may seep into the small gap between the threaded hole and the cap, making it difficult to remove the cap smoothly when subsequent rescue or maintenance operations are needed. This not only increases the difficulty of maintenance work, but also forces maintenance personnel to drill new holes at other locations on the segment to perform necessary repair or inspection work. However, each additional drilling hole will weaken the structural integrity of the segment to some extent, reducing its load-bearing capacity and potentially threatening the overall safety of the tunnel in the long run. SUMMARY

[0005] Therefore, the utility model provides a subway segment grouting pipe joint, which can make the drilling hole on the segment reusable through the joint pipe. This way, when performing rescue or maintenance work, there is no need to drill new holes on the segment, thereby not only improving work efficiency but also avoiding the impact on the structural strength of the segment.

[0006] To solve the above-mentioned technical problems, this utility model provides a grouting pipe joint for subway segments, including a joint pipe and a first external thread provided at the end of the joint pipe. The first external thread can be screwed into a threaded hole on the segment, and the joint pipe can be fixed as a whole through the first external thread. A second external thread is also provided at the end of the joint pipe away from the first external thread, and a cap or ball valve can be screwed onto the joint pipe through the second external thread.

[0007] The connector pipe is also equipped with a reinforcement structure, which is located between the first external thread and the second external thread. The reinforcement structure is used to assist the drilling or grouting equipment in being fixed. That is, the reinforcement structure can make the drilling or grouting equipment more stable on the connector pipe, or make the connector pipe more stable on the pipe segment.

[0008] The reinforcement structure is an annular groove set on the outer wall of the connector pipe.

[0009] The end cap has an internal threaded hole that is compatible with a second external thread. The internal threaded hole of the end cap is also equipped with a sealing element, which is used to keep the threaded structure between the connector tube and the end cap sealed.

[0010] The internal threaded hole of the cap forms a contact surface, and the sealing element is a sealing ring set on the contact surface. When the cap is installed on the connector pipe, the end of the connector pipe can contact the sealing ring. The sealing ring can further prevent the slurry from overflowing to the second external thread.

[0011] The sealing ring has a chamfered cross-section. This chamfer is located on the inner ring of the sealing ring. When the end cap is installed on the connector pipe, the end of the connector pipe can be embedded in the chamfered part, forcing the chamfered part to deform. That is, the chamfered part can further ensure the sealing performance of the end cap to the connector pipe.

[0012] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0013] 1. Improve the reusability of segment boreholes: By designing a connector pipe with a first external thread, this connector pipe can be firmly screwed into the threaded hole on the segment, so that the borehole does not need to be sealed or damaged after grouting. When emergency repairs or maintenance are required, the borehole can be reused simply by unscrewing the cap or ball valve, avoiding the need to re-drill holes on the segment, thereby protecting the structural integrity of the segment and extending the service life of the subway tunnel.

[0014] 2. Enhanced stability of grouting operations: The auxiliary reinforcement structures, such as annular grooves, on the joint pipe provide additional fixing points for drilling or grouting equipment. This design makes the equipment more stable during operation, reduces operational errors caused by shaking or misalignment, and improves the accuracy and efficiency of grouting operations.

[0015] 3. Optimized Sealing Performance: The internal threaded hole on the cap, combined with the sealing ring, forms an effective sealing barrier. In particular, the chamfered design on the sealing ring's cross-section allows the end of the connector pipe to embed into the chamfered area when the cap is installed on the connector pipe, forcing it to deform and further enhancing the sealing effect. This design effectively prevents grout from overflowing from the threaded gaps, ensuring smooth grouting operations and a clean tunnel interior.

[0016] 4. Improved Ease of Maintenance: The design of the grouting pipe joint allows for reusable drilling and provides excellent sealing performance. Therefore, in subsequent maintenance work, maintenance personnel do not need to re-drill holes in the segments; they can simply unscrew the cap or ball valve to perform the operation. This not only simplifies the maintenance process and reduces the difficulty of the work but also improves work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a subway segment grouting pipe joint according to the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model after the end cap is installed;

[0019] Figure 3 This is a structural schematic diagram of the connection between the end cap and the connector pipe of this utility model;

[0020] Figure 4 This utility model Figure 3 A schematic diagram of the structure at point A in the middle.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100. Connector pipe; 110. First external thread; 120. Second external thread; 130. Reinforcing structure;

[0023] 200, End cap; 210, Internal threaded hole; 211, Contact surface; 220, Sealing ring; 221, Chamfer. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figures 1-4 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0025] A type of subway segment grouting pipe joint, such as Figure 1As shown: This includes a connector pipe 100 connected to the pipe segment. Specifically, the end of the connector pipe 100 is provided with a first external thread 110 that matches the threaded hole of the pipe segment. The first external thread 110 is located on the outer surface of the end of the connector pipe 100 and can be screwed into the threaded hole on the pipe segment. This allows the connector pipe 100 to be screwed onto the pipe segment, and the slurry inside the connector pipe 100 can be input into the pipe segment through the threaded hole. Furthermore, the end of the connector pipe 100 away from the first external thread 110 is also provided with... There is a second external thread 120, which is also located on the outer surface of the connector tube 100. The ball valve and the cap 200 can be fixed to the connector tube 100 by the second external thread 120. Since the second external thread 120 is located on the outer wall of the connector tube 100, the slurry in the connector tube 100 will not seep into the thread structure between the second external thread 120 and the cap 200. This makes it easy to remove the cap 200 and reuse the connector tube 100 for operation.

[0026] Furthermore, the connector pipe 100 is also provided with a reinforcement structure 130, such as... Figure 1 , 2 As shown: The auxiliary reinforcement structure 130 is located between the first external thread 110 and the second external thread 120. The auxiliary reinforcement structure 130 provides an additional fixing point for drilling or grouting equipment. This design makes the equipment more stable during operation, reduces operational errors caused by shaking or misalignment, and improves the accuracy and efficiency of grouting operations. Specifically, the auxiliary reinforcement structure 130 is an annular groove set on the outer wall of the joint pipe 100. After the joint pipe 100 is fixed on the pipe segment, the annular groove is located on the outer surface of the pipe segment. Concrete is filled into the annular groove and is still adhered to the outer surface of the pipe segment. This further strengthens the structural stability of the joint pipe 100 on the pipe segment.

[0027] It is worth mentioning that the end cap 200 has an internal threaded hole 210, and a sealing element is also provided on the internal threaded hole 210 of the end cap 200, such as... Figure 3 , 4 As shown: The sealing element is used to keep the threaded structure between the connector tube 100 and the end cap 200 sealed. Specifically, the inner threaded hole 210 of the end cap 200 forms a contact surface 211, and the sealing element is a sealing ring 220 provided on the contact surface 211. After the end cap 200 is screwed onto the connector tube 100, the end of the connector tube 100 can abut against the sealing ring 220, so that the end of the connector tube 100 and the end cap 200 can be sealed. This prevents the slurry in the connector tube 100 from seeping into the space between the inner threaded hole 210 and the second threaded hole through the gap between the end cap 200 and the connector tube 100. This allows the end cap 200 to be removed and the connector tube 100 to continue working when emergency repairs or maintenance are required.

[0028] Furthermore, the cross-section of the sealing ring 220 has a chamfer 221, which is located on the inner ring of the sealing ring 220. This allows the end of the connector tube 100 to be embedded in the rubber ring after the end cap 200 is installed, thereby further enhancing the sealing performance between the end cap 200 and the connector tube 100.

[0029] Furthermore, after the end of the connector tube 100 is inserted into the chamfer 221, it will force the rubber ring to deform. After the rubber ring near the connector tube 100 is deformed, it will abut against the second external thread 120, which can further prevent the slurry from seeping into the space between the internal thread hole 210 and the second thread hole.

[0030] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A grouting pipe joint for subway tunnel segments, characterized in that: It includes a connector tube (100) and a first external thread (110) provided at the end of the connector tube (100). The first external thread (110) can be screwed into a threaded hole on the tube segment. The end of the connector tube (100) away from the first external thread (110) is also provided with a second external thread (120). The cap (200) or ball valve can be screwed onto the connector tube (100) through the second external thread (120).

2. The subway segment grouting pipe joint as described in claim 1, characterized in that: The connector pipe (100) is also provided with an auxiliary fixing structure (130), which is located between the first external thread (110) and the second external thread (120). The auxiliary fixing structure (130) is used to assist drilling or grouting equipment in fixing.

3. A subway segment grouting pipe joint as described in claim 2, characterized in that: The auxiliary reinforcement structure (130) is an annular groove provided on the outer wall of the connector pipe (100).

4. A subway segment grouting pipe joint as described in claim 3, characterized in that: The cap (200) has an internal threaded hole (210), and the internal threaded hole (210) of the cap (200) is also provided with a sealing element, which is used to keep the thread structure between the connector tube (100) and the cap (200) sealed.

5. A subway segment grouting pipe joint as described in claim 4, characterized in that: The inner threaded hole (210) of the cap (200) forms a contact surface (211), and the sealing element is a sealing ring (220) provided on the contact surface (211). When the cap (200) is installed on the connector tube (100), the end of the connector tube (100) can contact the sealing ring (220).

6. A subway segment grouting pipe joint as described in claim 5, characterized in that: The sealing ring has a chamfer (221) on its cross section. The chamfer (221) is located on the inner ring of the sealing ring (220). When the cap (200) is installed on the connector tube (100), the end of the connector tube (100) can be embedded in the chamfer (221) to force the chamfer (221) to deform.

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