Plugging tool for pressure steel pipe grouting hole in tunnel

Abstract

The utility model relates to the technical field of pressure steel pipe grouting plugging, and provides a plugging tool for a pressure steel pipe grouting hole in a tunnel. The outer side stress releasing groove is formed in the side, away from the pressure steel pipe, of the reinforcing plate, and when the reinforcing plate is welded to the outer side of the pressure steel pipe, the threaded sheath is screwed into the reinforcing plate mounting hole to avoid deformation of the reinforcing plate mounting hole in the welding process, so that the sealing effect of the reinforcing plate mounting hole and the threaded plugging plate is guaranteed; the threaded sheath is screwed into the reinforcing plate mounting hole during grouting, so that the situation that grouting concrete adheres to threads in the reinforcing plate mounting hole during grouting is avoided, the situation that screwing of the threaded plugging plate into the mounting hole is hindered is prevented, and the mounting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grouting plugging for penstocks, in particular to a plugging tool for grouting holes of penstocks in a tunnel. Background Technique

[0002] At present, during the pouring process of penstocks in a tunnel, the situation of voids often occurs due to many factors. The existence of voids poses a great hidden danger to the stable operation of the power station. Therefore, it is necessary to grout the void area of the penstock, and after grouting, it is necessary to plug the grouting holes.

[0003] After retrieval, the utility model patent with the application number 201420766111.9 proposes a plugging welding structure for grouting holes of penstocks in a pumped-storage power station. By setting unequal-length chamfers and straight edges, the weld fusion and connection stability are improved, crack generation is prevented, and the sealing performance is enhanced. Using hemp and aluminum gaskets further improves the water stop and sealing effects, prevents the threads of the grouting plug from leaking water, and avoids weld cracks and repairs. After welding the chuck to the grouting plug, the chuck can be reused, reducing the processing cost, and having the advantages of stable connection, good sealing performance, preventing water leakage and low cost. However, the patent has the following deficiencies: When welding the reinforcement plate, it may cause deformation of the connection hole between it and the grouting plug. After the connection hole is deformed, the sealing effect between the grouting plug and the reinforcement plate will be weakened; the internal threads in the connection hole between the reinforcement plate and the grouting plug are easily adhered by grouting concrete, which will make it difficult to connect the grouting plug and the reinforcement plate.

[0004] Therefore, it is urgent to develop a plugging tool for grouting holes of penstocks in a tunnel to overcome the deficiencies of the existing technology. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies of the existing technology and provide a plugging tool for grouting holes of penstocks in a tunnel to improve the plugging quality.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A plugging tool for grouting holes of penstocks in a tunnel includes a reinforcement plate, a threaded sheath, and a threaded plugging plate; an installation hole with internal threads is provided in the center of the reinforcement plate, and the threaded sheath is detachably connected to the installation hole; the threaded sheath is detachably connected to the grouting hole; the reinforcement plate is welded to the outside of the penstock; the upper end of the threaded plugging plate is hermetically connected to the installation hole, and the lower end is hermetically connected to the grouting hole. An outer stress release groove is provided on the side of the reinforcement plate away from the penstock, and a through grouting channel is provided at the upper end of the threaded sheath.

[0008] Preferably, an external thread matching the internal thread of the installation hole is provided on the outer side of the upper section of the threaded sheath, and a limiting ring is provided on the outer side of the middle section of the threaded sheath.

[0009] Preferably, an aluminum washer is provided on one side of the reinforcing plate close to the grouting hole.

[0010] Preferably, a threaded plug is provided at the upper end of the threaded plugging plate, a connecting plug is provided at the lower end of the threaded plugging plate, a groove is provided at the bottom end of the threaded plugging plate, and an external thread matching the internal thread in the installation hole is provided on the outside of the threaded plug.

[0011] Preferably, an inner stress relief groove is provided at the lower end of the threaded plugging plate.

[0012] The utility model discloses a plugging tool for a grouting hole of a penstock in a tunnel, which has the following beneficial effects.

[0013] First, on one side of the reinforcing plate away from the penstock, an outer stress relief groove is provided. When the reinforcing plate is welded to the outside of the penstock, a threaded sheath is screwed into the mounting hole of the reinforcing plate to prevent the deformation of the mounting hole of the reinforcing plate during welding, thereby ensuring the sealing effect between the mounting hole of the reinforcing plate and the threaded plugging plate.

[0014] Second, during grouting, a threaded sheath is screwed into the mounting hole of the reinforcing plate to prevent the internal thread in the mounting hole of the reinforcing plate from being adhered by the grouting concrete, and to prevent the threaded plugging plate from being blocked when it is screwed into the mounting hole, thereby improving the installation efficiency. Description of the Drawings

[0015] Figure 1 It is a schematic connection diagram of the threaded sheath, the reinforcing plate and the penstock of the utility model.

[0016] Figure 2 It is a schematic connection diagram of the threaded plugging plate, the reinforcing plate and the penstock of the utility model.

[0017] Figure 3 It is a schematic structural diagram of the threaded plugging plate of the utility model.

[0018] In the drawings: 1, reinforcing plate; 11, mounting hole; 12, outer stress relief groove; 2, aluminum washer; 3, threaded sheath; 31, limiting ring; 32, grouting channel; 4, threaded plugging plate; 41, threaded plug; 42, groove; 43, connecting plug; 44, inner stress relief groove; 5, penstock; 51, grouting hole. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. Embodiment

[0021] The present utility model discloses a plugging tool for grouting holes of a penstock in a tunnel, which is used for the scenario of plugging the grouting holes 51 of the penstock 5.

[0022] Refer to Figure 1 and Figure 2 A plugging tool for grouting holes of a penstock in a tunnel includes a reinforcing plate 1, a threaded sheath 3, and a threaded plugging plate 4. The center of the reinforcing plate 1 is provided with a mounting hole 11 with internal threads, and the center of the mounting hole 11 is aligned with the center of the grouting hole 51. On the side of the reinforcing plate 1 away from the penstock 5, there is an outer stress relief groove 12. The threaded sheath 3 is detachably connected to the mounting hole 11 through threads. Specifically, the outer side of the upper section of the threaded sheath 3 is provided with external threads matching the internal threads of the mounting hole 11 for detachable connection with the mounting hole 11. The threaded sheath 3 is detachably connected to the grouting hole 51. Specifically, a limiting ring 31 is provided on the outer side of the middle section of the threaded sheath 3, and the limiting ring 31 is sleeved on the grouting hole 51. When welding the reinforcing plate 1 to the outer side of the penstock 5, first connect the reinforcing plate 1 and the threaded sheath 3. After being fixed by the threaded sheath 3, it is closely attached to the outer wall of the penstock 5, and then circumferential welding is carried out. During the welding process, since the threaded sheath 3 is supported in the mounting hole 11, and in addition, the outer stress relief groove 12 is provided on the side of the reinforcing plate 1 away from the penstock 5, it can greatly prevent the deformation of the mounting hole 11, especially prevent the deformation of the internal threads in the mounting hole 11. After welding is completed, epoxy resin forms an epoxy resin ring for plugging. After each device cools down, the threaded sheath 3 can be removed. At this time, the threaded sheath 3 can be used for welding other reinforcing plates 1.

[0023] When grouting operation is required, connect the threaded sheath 3 to the mounting hole 11 of the reinforcement plate 1 to protect the internal thread of the mounting hole 11 of the reinforcement plate 1 and prevent thread damage. At this time, grouting is carried out through the penetrating grouting channel 32 provided at the upper end of the threaded sheath 3. After the grouting is completed, the threaded sheath 3 is screwed in and out back and forth to perform secondary cleaning on the internal thread of the mounting hole 11 of the reinforcement plate 1. After cleaning, the upper end of the threaded plugging plate 4 is hermetically connected to the mounting hole 11, and the lower end is hermetically connected to the grouting hole 51. Specifically, a threaded plug 41 is provided at the upper end of the threaded plugging plate 4, and an external thread matching the internal thread of the mounting hole 11 is provided on the outside of the threaded plug 41. The threaded plug 41 is hermetically connected to the mounting hole 11 through the external thread matching the internal thread of the mounting hole 11 on the outside. An aluminum washer 2 is provided on one side of the reinforcement plate 1 close to the grouting hole 51, which is used to evenly distribute the force and ensure the tightness of fastening during the construction of the threaded sheath 3 and the connection of the threaded plugging plate 4. To facilitate the screwing in of the threaded plug 41, rust removal is carried out before installation. A connecting plug 43 is provided at the lower end of the threaded plugging plate 4, which serves as the stress point for fastening. The connecting plug 43 has a hexagonal prism shape, which is convenient for using tools such as wrenches to tighten the threaded plugging plate 4. After tightening the threaded plugging plate 4, the connecting plug 43 is cut off and ground flat. To ensure the welding effect between the threaded plugging plate 4 and the penstock 5, a groove 42 is provided at the bottom end of the threaded plugging plate 4, and an internal stress relief groove 44 is provided at the lower end of the threaded plugging plate 4. After welding, an epoxy resin ring is formed using epoxy resin for plugging.

[0024] In this embodiment, the size of the central mounting hole 11 of the reinforcement plate 1 is D57, the thread is M56×2, the external thread sizes of the threaded sheath 3 and the threaded plugging plate 4 are M56×2, and the opening size of the grouting hole 51 on the penstock 5 is D76.

[0025] The above is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The substitution can be the substitution of some structures, devices, and method steps, or a complete technical solution. Any equivalent substitution or change made according to the technical solution and the inventive concept of the present invention should be covered within the protection scope of the present invention.

Claims

1. A plugging tool for grouting holes of pressure steel pipes in tunnels, characterized in that: The invention comprises a reinforcing plate (1), a threaded sleeve (3), and a threaded plugging plate (4); the reinforcing plate (1) is provided with a mounting hole (11) with an internal thread at the center, the threaded sleeve (3) is detachably connected to the mounting hole (11); the threaded sleeve (3) is detachably connected to the grouting hole (51); the reinforcing plate (1) is welded to the outside of the pressure steel pipe (5); the upper end of the threaded plugging plate (4) is sealedly connected to the mounting hole (11), and the lower end is sealedly connected to the grouting hole (51); the reinforcing plate (1) is provided with an outer stress release groove (12) on the side away from the pressure steel pipe (5), and the upper end of the threaded sleeve (3) is provided with a penetrating grouting channel (32).

2. A plugging tool for a grouting hole of a pressure steel pipe in a tunnel according to claim 1, characterized in that: An outer side of the upper section of the threaded sleeve (3) is provided with an external thread matching the internal thread of the mounting hole (11), and a limiting ring (31) is provided on the outer side of the middle section of the threaded sleeve (3).

3. A plugging tool for grouting holes of pressure steel pipes in tunnels according to claim 1, characterized in that: An aluminum washer (2) is provided on one side of the reinforcement plate (1) close to the grouting hole (51).

4. A plugging tool for grouting holes of pressure steel pipes in tunnels according to claim 1, characterized in that: The upper end of the threaded sealing plate (4) is provided with a threaded plug (41), the lower end of the threaded sealing plate (4) is provided with a connecting plug (43), the bottom end of the threaded sealing plate (4) is provided with a groove (42), and the outer side of the threaded plug (41) is provided with an external thread matching the internal thread of the mounting hole (11).

5. A plugging tool for grouting holes of pressure steel pipes in tunnels according to claim 1 or 4, characterized in that: An inner stress release groove (44) is provided at the lower end of the threaded sealing plate (4).

Images