Spliced pile casing

Abstract

The utility model relates to the technical field of spliced pile casings, and discloses a spliced pile casing which comprises a first connecting cylinder, a plurality of second connecting cylinders and a third connecting cylinder which are sequentially and detachably connected to form a pile casing used for being buried underground. A plurality of first barrier strips are arranged on the outer side of the first connecting cylinder, second barrier strips matched with the first barrier strips are arranged on the second connecting cylinder and the third connecting cylinder, and when the first connecting cylinder, the second connecting cylinders and the third connecting cylinder are sequentially connected, the first barrier strips and the second barrier strips are connected end to end to form an anti-rotation mechanism. According to the anti-rotation pile casing, the pile casing can be prevented from rotating under the action of external force during drilling through the anti-rotation mechanism, and on the other hand, the first connecting cylinder and the second connecting cylinder can be aligned to the embedding center through the guide unit.

Description

Technical Field

[0001] The utility model relates to the technical field of spliced ​​casings, in particular to a spliced ​​casing. Background Art

[0002] In infrastructure projects, rotary drilling is a commonly used underground construction method, and steel casing is one of the means to prevent shrinkage in the rotary drilling construction method. Long casing, in particular, can prevent shrinkage better than mud wall protection. After the casing is buried, it is necessary to ensure the fixation and stability of the casing during the drilling process. Otherwise, in actual construction, sometimes the casing rotates or deviates due to improper construction operation, mechanical failure or geological conditions, which leads to a decline in construction quality.

[0003] In the prior art, a utility model patent (CN220377264U) discloses a spliced ​​steel casing, comprising a plurality of upper sections of spliced ​​casings and a lower section of casing boots, wherein the spliced ​​casings are spliced ​​together and fixedly connected via casing connectors, wherein the upper portion of the casing boots is spliced ​​and fixedly connected to the lower portion of the spliced ​​casing via the casing connector, wherein the lower edge of the casing boots is evenly provided with latching teeth, so that the lower portion of the casing boots becomes a drill bit, and the topmost spliced ​​casing is connected to the casing driver of a rotary drilling rig, and the casing cannot prevent the spliced ​​casings from rotating, deflecting, or tilting due to external force on the borehole after burial and from being separated from the original buried position.

[0004] Based on this, the technical problem to be solved in this case is: how to provide a spliced ​​casing that is easy to install, easy to dismantle, can be clamped to prevent disengagement, and is easy to lower and pull out. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a spliced ​​casing.

[0006] The technical solution of the utility model is:

[0007] A spliced ​​casing comprises a first connecting tube, a plurality of second connecting tubes and a third connecting tube. The first connecting tube, the plurality of second connecting tubes and the third connecting tube are detachably connected in sequence to form a casing for burying underground. A plurality of first baffles are provided on the outer side of the first connecting tube. The second connecting tube and the third connecting tube are provided with second baffles matching the first baffles. When the first connecting tube, the plurality of second connecting tubes and the third connecting tube are connected in sequence, the first baffles and the second baffles are connected end to end to form an anti-rotation mechanism. The second baffle is provided with a guide unit for aligning the first connecting tube or the second connecting tube with the burying center.

[0008] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0009] The utility model can prevent the casing from rotating due to external force during drilling through the anti-rotation mechanism. On the other hand, the first connecting tube and the second connecting tube can be aligned with the burial center through the guide unit, and the first baffle and the second baffle are connected end to end to increase the effective area of ​​the anti-rotation mechanism and enhance the anti-rotation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional diagram of embodiment 1 of the utility model;

[0011] Figure 2 It is a cross-sectional view of Example 1 of the utility model;

[0012] Figure 3 is a bottom view of the first connecting tube;

[0013] Figure 4 is a front view of the second connecting tube;

[0014] Figure 5 It is a top view of the third connecting tube. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] Example 1

[0017] See also Figure 1-5 A spliced ​​casing comprises a first connecting tube 1, a plurality of second connecting tubes 2, and a third connecting tube 3. The first connecting tube 1, a plurality of second connecting tubes 2, and the third connecting tube 3 are detachably connected in sequence to form a casing for burying underground. A plurality of first baffles 41 are provided on the outer side of the first connecting tube 1. The second connecting tube 2 and the third connecting tube 3 are provided with second baffles 42 matching the first baffles 41. When the first connecting tube 1, a plurality of second connecting tubes 2, and the third connecting tube 3 are connected in sequence, the first baffles 41 and the second baffles 42 are connected end to end to form an anti-rotation mechanism 4. The second baffles 42 are provided with a guide unit 5 for aligning the first connecting tube 1 or the second connecting tube 2 with the burying center.

[0018] In actual use, the first connecting tube 1, multiple second connecting tubes 2, and the third connecting tube 3 are connected in sequence to form a casing. After the connection, the first baffle 41 and the second baffle 42 form an anti-rotation mechanism 4 connected end to end. During the connection process, the first connecting tube 1 or the second connecting tube 2 can be aligned with the burial center through the guide unit 5 of the second connecting tube 2 or the third connecting tube 3 to complete the alignment. Specifically, when placing the second connecting tube 2 or the first connecting tube 1, the position of the first baffle 41 or the second baffle 42 can be used for pre-alignment, and the alignment can be further completed through the guide unit 5 on the second baffle 42. In particular, in this embodiment, the horizontal cross-section of the first baffle 41 and the second baffle 42 is a trapezoid, which can increase the contact area between the first baffle 41 and the second baffle 42 and the soil outside the casing after burial, thereby enhancing the anti-rotation effect.

[0019] Furthermore, the guide unit 5 includes a roller 51 and a rotating block 52 , wherein the rotating block 52 is connected to the top of the second stop bar 42 , and the roller 51 is connected to the rotating block 52 and is arranged obliquely.

[0020] Through the above design, in the normal state, the roller 51 protrudes from the second baffle 42 and is tilted upward; when the bottom of the first connecting tube 1 or the second connecting tube 2 contacts with the roller 51, the roller 51 will guide the first connecting tube 1 or the second connecting tube 2 to align with the burial center and rotate away from the burial center axis. When the first connecting tube 1 or the second connecting tube 2 is removed, the roller 51 will return to the normal state due to the action of gravity. Specifically, after the roller 51 contacts with the first connecting tube 1 or the second connecting tube 2, the roller 51 always maintains contact with the first connecting tube 1 or the second connecting tube 2.

[0021] Furthermore, the first baffle bar 41 and the second baffle bar 42 are both provided with a clearance groove 43 at the bottom, and the clearance groove 43 forms a placement portion when the adjacent second baffle bars 42 or the first baffle bar 41 and the second baffle bar 42 are connected end to end, and the placement portion is used to place the roller 51.

[0022] In the above design, the roller 51 that has achieved the guiding function can be accommodated in the air avoidance groove 43 through the air avoidance groove 43 to avoid interference.

[0023] More preferably, the number of the first baffles 41 is four, and they are arranged in an array on the central circumference of the first connecting tube 1 .

[0024] In this embodiment, the first blocking bars 41 in four directions can further prevent the casing from rotating when buried underground.

[0025] Preferably, it also includes a snap-in block 6 and a snap-in groove 7, the snap-in block 6 is connected to the bottom of the first connecting tube 1 and the second connecting tube 2, the snap-in groove 7 is connected to the top of the second connecting tube 2 and the third connecting tube 3, the snap-in block 6 matches the snap-in groove 7, and the first connecting tube 1, multiple second connecting tubes 2, and the third connecting tube 3 can all be detachably connected to the snap-in groove 7 through the snap-in block 6.

[0026] In this embodiment, the adjacent first connecting tube 1, multiple second connecting tubes 2, and third connecting tube 3 can be snap-fitted together through the snap-fit ​​block 6. Specifically, the snap-fit ​​block 6 and the snap-fit ​​groove 7 can be positioned at any position on the top of the second connecting tube 2 or the third connecting tube 3. Preferably, they can be arranged between the second baffle bars 42, which can facilitate pre-positioning by the staff. In particular, the vertical cross-section of the snap-fit ​​block 6 and the snap-fit ​​groove 7 is trapezoidal, which can further prevent rotation between the first connecting tube 1, the second connecting tube 2, and the third connecting tube 3.

[0027] Furthermore, a plurality of L-shaped plates 8 are provided, wherein the vertical plates 81 of the L-shaped plates 8 are connected to the outer side of the first connecting tube 1, and the L-shaped horizontal plates 82 extend outward from the first connecting tube 1. The L-shaped horizontal plates 82 are used to be fixed on the ground after the casing is buried to prevent the casing from tilting and shifting.

[0028] In this embodiment, the casing will protrude from the ground by 0.3-0.5m after being buried. Specifically, the height of the L-shaped plate 8 is designed to be consistent with the height protruding from the ground, so that after the casing is buried, the L-shaped plate 8 can form a fixing effect with the ground, further preventing the casing from being offset or tilted by external force during the drilling process.

[0029] Preferably, the number of the L-shaped plates 8 is four, and they are arranged in an array on the central circumference of the first connecting cylinder 1 .

[0030] Through the above design, the L-shaped plate 8 can distribute the external force received by the casing more evenly, thereby improving the fixing effect.

[0031] More preferably, the first connecting tube 1 is provided with an overflow hole 9 extending therethrough.

[0032] When pouring concrete, the overflow hole 9 can better protect the casing and avoid deformation or rupture of the casing due to excessive pressure inside the casing.

[0033] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A spliced ​​casing, comprising a first connecting tube, a plurality of second connecting tubes, and a third connecting tube, wherein the first connecting tube, the plurality of second connecting tubes, and the third connecting tube are sequentially detachably connected to form a casing for burying underground, characterized in that: A plurality of first baffles are provided on the outer side of the first connecting tube, and a second baffle matching the first baffle is provided on the second connecting tube and the third connecting tube. When the first connecting tube, a plurality of second connecting tubes, and the third connecting tube are connected in sequence, the first baffle and the second baffle are connected end to end to form an anti-rotation mechanism, and a guide unit for aligning the first connecting tube or the second connecting tube with the buried center is provided on the second baffle.

2. A spliced ​​casing according to claim 1, characterized in that: The guide unit comprises a roller and a rotating block, wherein the rotating block is connected to the top of the second baffle bar, and the roller is connected to the rotating block and arranged obliquely; Under normal conditions, the roller protrudes from the second baffle and is arranged tilted upward; when the bottom of the first connecting tube or the second connecting tube contacts the roller, the roller guides the first connecting tube or the second connecting tube to align with the burial center and rotates away from the burial center axis, and the roller always maintains contact with the first connecting tube or the second connecting tube.

3. A spliced ​​casing according to claim 2, characterized in that: A clearance groove is provided at the bottom of the second baffle bar, and the clearance groove forms a placement portion when adjacent second baffle bars or the first baffle bar and the second baffle bar are connected end to end, and the placement portion is used to place the roller.

4. A spliced ​​casing according to claim 3, characterized in that: The number of the first baffles is four, and they are arranged in an array around the center circumference of the first connecting tube.

5. A spliced ​​casing according to claim 1, characterized in that: It also includes a clamping block and a clamping groove, wherein the clamping block is connected to the bottom of the first connecting tube and the second connecting tube, and the clamping groove is connected to the top of the second connecting tube and the third connecting tube. The clamping block matches the clamping groove, and the first connecting tube, multiple second connecting tubes, and the third connecting tube can all be detachably connected to the clamping groove through the clamping block.

6. A spliced ​​casing according to claim 1, characterized in that: It also includes multiple L-shaped plates, the vertical plates of the L-shaped plates are connected to the outside of the first connecting tube, the L-shaped horizontal plates extend outward of the first connecting tube, and the L-shaped horizontal plates are used to be fixed on the ground after the casing is buried to prevent the casing from tilting and shifting.

7. A spliced ​​casing according to claim 6, characterized in that: The number of the L-shaped portions is four and they are arranged in an array around the central circumference of the first connecting tube.

8. A spliced ​​casing according to claim 1, characterized in that: The first connecting tube is provided with a penetrating overflow hole.

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