Steel casing follow-up device

Abstract

The utility model discloses a steel casing follow-up device which comprises a casing, an inserting groove is formed in the top end of the casing, four L-shaped grooves are formed in the inserting groove at equal intervals, an inner pipe is fixedly connected to the bottom end of the casing, four limiting blocks arranged at equal intervals are fixedly connected to the outer portion of the inner pipe, a limiting ring is rotationally arranged outside the inner pipe, and the limiting ring is fixedly connected to the outer portion of the casing. The limiting ring is located above the limiting block, when the two pile casings are connected together in an inserted mode, rotation between the two pile casings is prevented by placing the inserting plate in the L-shaped groove, and the limiting ring blocks an outlet of the L-shaped groove. According to the utility model, the two pile casings are connected in an inserting manner instead of threaded connection, so that the problem that the threaded connection of the two pile casings is difficult due to the corrosion of threads in the threaded holes on the pile casings is avoided, the inserting manner is simple, the processing is easy, the maintenance is convenient, the mounting and the dismounting are convenient, and the construction progress is greatly accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of following casing, and particularly relates to a steel casing following device. Background Art

[0002] At present, during the construction process of conventional rotary drilling to form a hole, it is generally necessary to pre-bury a steel casing on the construction ground, and then the rotary drill bit rotates inside the steel casing. During the construction process, the casing can play a role in fixing the pile position and guiding the drilling direction. At the same time, it can also isolate surface water from flowing into the well hole and protect the hole opening from collapsing.

[0003] For the connection between two sections of the casing, the prior art uses multiple screws to connect the two sections of the casing. The following casing mostly works in soil layers with relatively high water content, which causes corrosion of the threaded holes on the casing. When using screws to connect the two sections of the casing, it is difficult to screw the screws into the two casings. Moreover, due to the large number of screws, the workload of installation and disassembly also increases exponentially, greatly delaying the construction progress. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a steel casing following device to solve the above deficiencies in the prior art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A steel casing following device includes a casing. A slot is opened at the top end of the casing, and four L-shaped slots with equal spacing are opened in the slot. An inner pipe is fixedly connected to the bottom end of the casing. Four equally spaced limiting blocks are fixedly connected to the outside of the inner pipe. A limiting ring is rotatably arranged outside the inner pipe, and the limiting ring is located above the limiting blocks. When two casings are inserted together, inserting plates into the L-shaped slots can prevent rotation between the two casings, and the limiting ring blocks the outlet of the L-shaped slots.

[0006] Further, an annular sleeve is fixedly sleeved outside the inner pipe, and the annular sleeve is connected to the casing through four equally spaced connecting bars.

[0007] Further, the limiting ring is rotatably arranged between the casing and the annular sleeve, and the inner side wall of the limiting ring is located outside the connecting bars.

[0008] Further, four equally spaced first vertical slots are opened on the annular sleeve, and four equally spaced second vertical slots are opened on the limiting ring. The first vertical slots and the second vertical slots can allow the inserting plates to be inserted.

[0009] Further, a second reserved hole is opened at the top end of the inserting plate. When the inserting plate is inserted into the L-shaped slot, the second reserved hole is located in the first vertical slot.

[0010] Further, a plurality of first reserved holes are formed in the side wall of the limiting ring.

[0011] In the above technical solution, the beneficial effects of a steel casing following device provided by the present utility model are as follows:

[0012] By replacing the threaded connection between the two casings with a plug-in connection, the present utility model avoids the problem that the internal thread in the threaded hole of the casing is corroded, resulting in difficult threaded connection between the two casings. Moreover, the plug-in connection method is simple, easy to process, convenient for maintenance, and the installation and disassembly are convenient, greatly improving the construction progress.

[0013] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0014] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and does not represent the full scope of the disclosed technology or a complete disclosure of all features. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments described in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0016] Figure 1 Structural schematic diagram provided for an embodiment of the present utility model;

[0017] Figure 2 Structural schematic diagram of the connection of two sections of casings provided for an embodiment of the present utility model;

[0018] Figure 3 Provided for an embodiment of the present utility model Figure 2 Enlarged view of location A.

[0019] Description of the reference numerals:

[0020] 1. Casing; 11. Slot; 12. L-shaped groove; 13. Inner tube; 2. Annular sleeve; 21. First vertical groove; 3. Limiting block; 4. Connecting strip; 5. Limiting ring; 51. Second vertical groove; 52. First reserved hole; 6. Insertion plate; 61. Second reserved hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present disclosure with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts fall within the scope of protection of the present disclosure.

[0022] Please refer to FIGS. 1-3. A steel casing following device includes a casing 1. A slot 11 is provided at the top end of the casing 1. Four L-shaped grooves 12 with equal spacing are provided in the slot 11. An inner tube 13 is fixedly connected to the bottom end of the casing 1. Four equally spaced limiting blocks 3 are fixedly connected to the outside of the inner tube 13. A limiting ring 5 is rotatably arranged outside the inner tube 13. The limiting ring 5 is located above the limiting blocks 3. When two casings 1 are inserted into each other, inserting plates 6 are placed in the L-shaped grooves 12 to prevent rotation between the two casings 1, and the limiting ring 5 blocks the outlet of the L-shaped grooves 12. An annular sleeve 2 is fixedly sleeved outside the inner tube 13. The distance between the annular sleeve 2 and the bottom of the limiting blocks 3 is the same as the depth of the slot 11. The annular sleeve 2 is connected to the casing 1 by four equally spaced connecting bars 4. The connecting bars 4 are welded among the casing 1, the inner tube 13, and the annular sleeve 2. The limiting ring 5 is rotatably arranged between the casing 1 and the annular sleeve 2, and the inner side wall of the limiting ring 5 is located outside the connecting bars 4, facilitating the construction workers to rotate the limiting ring 5. Four equally spaced first vertical grooves 21 are provided in the annular sleeve 2. Four equally spaced second vertical grooves 51 are provided in the limiting ring 5. The first vertical grooves 21 and the second vertical grooves 51 are available for the inserting plates 6 to be inserted. A second reserved hole 61 is provided at the top end of the inserting plate 6. When the inserting plate 6 is inserted into the L-shaped groove 12, the second reserved hole 61 is located in the first vertical groove 21. The vertical groove of the L-shaped groove 12 and the first vertical groove 21 are in the same vertical direction and have the same horizontal width. The horizontal width of the horizontal groove of the L-shaped groove 12 is slightly larger than twice the horizontal width of the limiting block 3, and the horizontal width of the inserting plate 6 is the same as the horizontal width of the limiting block 3, ensuring that the limiting block 3 can slide into the L-shaped groove 12 while the inserting plate 6 can lock the limiting block 3 in the horizontal groove of the L-shaped groove 12.

[0023] Specifically, refer to Figures 1 to 3When two casings 1 need to be connected, first lift the casing 1 and align it with the top of the other casing 1 so that the axes of the two are in a straight line, align the limit block 3 with the L-shaped groove 12, insert the limit block 3 into the L-shaped groove 12, and then rotate the upper casing 1 so that the limit block 3 is stuck in the horizontal groove of the L-shaped groove 12. Then, rotate the limit ring 5 to align the second vertical groove 51 with the first vertical groove 21, and then put the plug plate 6 into the second vertical groove 51, so that the plug plate 6 slides into the L-shaped groove 12, and blocks the limit block 3 in the horizontal groove of the L-shaped groove 12 to prevent it from rotating. Move, and finally rotate the limiting ring 5 so that the second vertical groove 51 is staggered with the first vertical groove 21, and the plug plate 6 is blocked in the L-shaped groove 12 and the first vertical groove 21 to complete the docking of the two casings 1; when the two need to be separated, first rotate the limiting ring 5 so that the second vertical groove 51 is aligned with the first vertical groove 21, and use an iron rod to pass through the second reserved hole 61, lift the plug plate 6 out of the L-shaped groove 12 and take it out, then rotate the casing 1 located above so that the limiting block 3 is separated from the horizontal groove of the L-shaped groove 12, and finally pull the casing 1 located above upward to pull the limiting block 3 out of the vertical groove of the L-shaped groove 12.

[0024] The utility model replaces the threaded connection with the plug-in connection mode of the two casings 1, thereby avoiding the problem that the inner thread of the threaded hole on the casing 1 is corroded and thus the threaded connection of the two casings 1 is difficult. The plug-in connection mode is simple, easy to process, convenient to maintain, and convenient to install and disassemble, which greatly improves the construction progress.

[0025] Furthermore, a plurality of first reserved holes 52 are formed on the side wall of the limiting ring 5 .

[0026] Specifically, refer to Figure 1 By providing a plurality of first reserved holes 52 on the limiting ring 5, it is convenient to insert an iron rod into the first reserved hole 52 to rotate the limiting ring 5, thereby achieving a labor-saving effect.

[0027] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A steel casing follow-up device, comprising a casing (1), characterized in that: The top of the casing (1) is provided with a slot (11), and four L-shaped slots (12) with equal spacing are provided in the slot (11). The bottom of the casing (1) is fixedly connected to an inner tube (13), and four limit blocks (3) arranged at equal distances are fixedly connected to the outside of the inner tube (13). A limit ring (5) is rotatably arranged outside the inner tube (13), and the limit ring (5) is located above the limit block (3). When two casings (1) are plugged together, a plug plate (6) is placed in the L-shaped slot (12) to prevent the two casings (1) from rotating, and the limit ring (5) blocks the outlet of the L-shaped slot (12).

2. A steel casing follow-up device according to claim 1, characterized in that: An annular sleeve (2) is fixedly sleeved outside the inner tube (13), and the annular sleeve (2) is connected to the casing (1) via four connecting strips (4) arranged at equal distances.

3. A steel casing follow-up device according to claim 2, characterized in that: The limiting ring (5) is rotatably arranged between the casing (1) and the annular sleeve (2), and the inner side wall of the limiting ring (5) is located on the outer side of the connecting strip (4).

4. A steel casing follow-up device according to claim 3, characterized in that: The annular sleeve (2) is provided with four equidistant first vertical grooves (21), and the limiting ring (5) is provided with four equidistant second vertical grooves (51). The first vertical grooves (21) and the second vertical grooves (51) are provided for inserting the plug plate (6).

5. A steel casing follow-up device according to claim 4, characterized in that: A second reserved hole (61) is provided at the top end of the plugging plate (6), and when the plugging plate (6) is inserted into the L-shaped groove (12), the second reserved hole (61) is located in the first vertical groove (21).

6. A steel casing follow-up device according to claim 1, characterized in that: A plurality of first reserved holes (52) are provided on the side wall of the limiting ring (5).

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