Steel casing structure of rotary excavating pile

Abstract

The utility model relates to the technical field of rotary excavating pile casings, in particular to a rotary excavating pile steel casing structure which comprises an outer casing, a through hole is formed in the outer casing, multiple sets of inner casings are inserted into the through hole and sequentially stacked in the axial direction, a groove is formed in the top of each inner casing, multiple sets of threaded holes are formed in the inner wall of each groove at intervals in the circumferential direction, and adjusting rods are inserted into the threaded holes in a matched mode. According to the device, multiple sets of inner cylinders are spliced through the clamping rings and the grooves by a worker, the multiple sets of inner cylinders can be conveniently combined and lengthened by rotating the adjusting rod, the inner cylinders are made to be suitable for drilling holes of different depths, and the working efficiency is improved. And the application range is widened.

Description

TECHNICAL FIELD

[0001] The application relates to the field of rotary digging pile casing, in particular to a rotary digging pile steel casing structure. BACKGROUND

[0002] In the rotary digging pile construction process, a steel casing is generally buried to position a pile site to be drilled and protect the drilling hole mouth, especially when drilling a cast-in-place pile in a backfill area, since the backfill soil is loose, pile body deflection and hole collapse may occur during drilling, and therefore it is necessary to use a casing to ensure construction safety during rotary drilling and prevent collapse.

[0003] A utility model patent with the publication number CN222010112U discloses a rotary drilling double-casing structure for sand-rich strata in a riverside area, which comprises an outer casing, an inner casing arranged inside the outer casing, and a steel reinforcement frame arranged inside the inner casing. The length of the outer casing is less than the length of the inner casing, and the length of the steel reinforcement frame is greater than the length of the inner casing. A positioning and guiding structure is arranged between the outer casing and the inner casing. The positioning and guiding structure comprises a plurality of guiding grooves formed in the inner side wall of the outer casing, guiding protrusions arranged on the outer side wall of the inner casing and matched with the guiding grooves, a plurality of lifting lugs fixedly arranged on the outer side wall of the upper end of the inner casing, and a plugging and sealing element detachably connected with the lifting lugs. The positioning and guiding structure ensures the concentricity of the outer casing and the inner casing when they are arranged, and prevents drilling residues from falling into the gap between the outer casing and the inner casing.

[0004] The device is provided with an outer casing and an inner casing. The guiding protrusions on the inner casing slide along the guiding grooves of the outer casing to realize insertion and limiting of the inner casing. However, when the pile hole is deep and multiple inner casings are needed for insertion and protection, the inner casings are inconvenient to splice, effective protection of the rotary pile hole is inconvenient, and the scope of application is not large. UTILITY MODEL CONTENT

[0005] In view of the problem of limited scope of application in the prior art, the utility model provides a rotary pile steel casing structure.

[0006] Therefore, the utility model adopts the specific technical scheme as follows:

[0007] The utility model provides a rotary pile steel casing structure, which comprises an outer cylinder, a through hole is arranged in the outer cylinder, an inner cylinder is inserted in the through hole, the number of the inner cylinders is multiple groups and the inner cylinders are sequentially stacked along the axial direction, a groove is arranged at the top of the inner cylinder, a plurality of threaded holes are arranged at the inner wall of the groove in the circumferential direction, an adjusting rod is inserted and matched in the threaded hole, a clamping ring matched with the groove is arranged at the bottom of the inner cylinder, and a clamping groove matched with the threaded hole is arranged at the outer wall of the clamping ring.

[0008] Further, a limiting mechanism is arranged on the outer cylinder.

[0009] Preferably, the limiting mechanism comprises limiting plates, which are arranged in multiple groups and are arranged along the circumference of the through hole, and the multiple groups of limiting plates are uniformly arranged along the circumference of the through hole, so as to further guide and limit the inner cylinder and ensure the accuracy of the position of the inner cylinder during insertion.

[0010] Preferably, a plurality of groups of counterbores are arranged on the side of the limiting plate close to the inner cylinder along the vertical direction, and a pulley is arranged to rotate in the counterbores, so that the pulley abuts against the outer wall of the inner cylinder during the descending process of the inner cylinder, thereby avoiding collision between the outer wall of the inner cylinder and the limiting plate, and ensuring the safety of the inner cylinder.

[0011] Preferably, a baffle is fixedly arranged on the inner wall of the through hole, the baffle is annular, and a slot matched with the limiting plate is arranged on the baffle, so that the residues of the drilling hole are prevented from falling into the gap between the outer cylinder and the inner cylinder, and the smooth pulling out of the inner cylinder is ensured.

[0012] Preferably, the side of the top of the baffle close to the limiting plate is arranged to be inclined, so that the inner cylinder can be guided when being placed into the through hole, and the convenient alignment of the inner cylinder with the drilling direction is ensured.

[0013] Preferably, rubber pads are arranged on the side of the baffle and the limiting plate close to the inner cylinder, so that the inner cylinder can be protected when colliding with the baffle and the limiting plate during the insertion and pulling out process, and damage caused by direct collision is avoided.

[0014] Preferably, the length of the outer cylinder is greater than the length of the inner cylinder, so that multiple groups of inner cylinders can be guided and limited simultaneously when the inner cylinders descend along the outer cylinder, and the accuracy of the descending of the inner cylinder is ensured.

[0015] Preferably, a lifting ring is fixedly arranged on the top of the outer cylinder, so that the outer cylinder can be conveniently carried and transferred by an external device by the staff, and the operation is convenient.

[0016] The above technical scheme has the following advantages:

[0017] In the utility model, the outer cylinder is provided, the through hole is arranged in the outer cylinder, the inner cylinder is inserted in the through hole, the number of the inner cylinders is multiple and the inner cylinders are sequentially stacked along the axial direction, the recess is arranged on the top of the inner cylinder, the multiple groups of screw holes are arranged on the inner wall of the recess along the circumference and are arranged at intervals, the adjusting rod is inserted and matched in the screw hole, the clamping ring matched with the recess is arranged on the bottom of the inner cylinder, the clamping groove matched with the screw hole is arranged on the outer wall of the clamping ring, the multiple groups of inner cylinders are conveniently combined and lengthened by the staff through the splicing of the clamping ring and the recess and the rotation of the adjusting rod in the utility model, the inner cylinder is suitable for drilling holes with different depths, and the application range is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0019] Figure 1 A structure schematic view of the utility model is shown.

[0020] Figure 2 A partial structure schematic view of the utility model is shown.

[0021] Figure 3 A partial structure schematic view of the utility model is shown.

[0022] Figure 4 A partial sectional view of the utility model is shown.

[0023] Wherein: 1, outer cylinder; 101, through hole; 102, lifting ring; 2, inner cylinder; 201, groove; 202, threaded hole; 203, clamping groove; 3, limiting plate; 301, pulley; 4, baffle. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present application.

[0025] As shown in the drawings, Figures 1-4 The utility model discloses an embodiment discloses a rotary digging pile steel casing structure, including outer cylinder 1 and limiting mechanism, be equipped with through hole 101 in outer cylinder 1, be equipped with inner cylinder 2 in through hole 101, and the number of inner cylinder 2 is multiple groups and is sequentially stacked along the axial direction, and the top of inner cylinder 2 is equipped with groove 201, and the inner wall of groove 201 is equipped with multiple groups of threaded hole 202 along the circumference and is separated, and the threaded hole 202 is equipped with the adjusting rod of cooperation and inserts, and the bottom of inner cylinder 2 is equipped with the snap ring of the matching of groove 201, and the outer wall of snap ring is equipped with the clamping groove 203 of the alignment of threaded hole 202, and the limiting mechanism is set up in outer cylinder 1.

[0026] In at least one embodiment, the limiting mechanism includes a limiting plate 3, which is arranged in multiple groups and is spaced apart along the circumference of the through hole 101. The multiple groups of limiting plates 3 are uniformly arranged along the circumference of the through hole 101. The limiting plate 3 is further guided and limited to the inner cylinder 2, ensuring the accuracy of the position of the inner cylinder 2 when inserted.

[0027] In at least one embodiment, the limiting plate 3 is provided with a plurality of groups of holes near one side of the inner cylinder 2 in the vertical direction, and a pulley 301 is rotatably arranged in the hole. By arranging the rotating pulley 301 on the limiting plate 3, the pulley 301 abuts against the outer wall of the inner cylinder 2 during the descent of the inner cylinder 2, avoiding direct collision between the outer wall of the inner cylinder 2 and the limiting plate 3, and ensuring the safety of the inner cylinder 2.

[0028] In at least one embodiment, the inner wall of the through hole 101 is fixedly provided with a baffle 4, which is annular. The baffle 4 is provided with a slot matched with the limiting plate 3. The baffle 4 is arranged to prevent drill residues from falling into the gap between the outer cylinder 1 and the inner cylinder 2, ensuring the smooth pulling out of the inner cylinder 2.

[0029] In at least one embodiment, one side of the top of the limiting plate 3 is arranged to be inclined. By arranging the top of the limiting plate 3 to be inclined, the inner cylinder 2 can be guided when it is placed in the through hole 101, ensuring the convenient alignment of the inner cylinder 2 with the drilling direction.

[0030] In at least one embodiment, the baffle 4 and the limiting plate 3 are provided with rubber pads near one side of the inner cylinder 2. By arranging the rubber pads on the baffle 4 and the limiting plate 3, the inner cylinder 2 can be protected when it collides with the baffle 4 and the limiting plate 3 during insertion and pulling out, avoiding damage caused by direct collision.

[0031] In at least one embodiment, the length of the outer cylinder 1 is greater than the length of the inner cylinder 2, so that a plurality of inner cylinders 2 can be guided and limited at the same time when the inner cylinder 2 descends along the outer cylinder 1, ensuring the precision of the descent of the inner cylinder 2.

[0032] In at least one embodiment, the top of the outer cylinder 1 is fixedly provided with a lifting ring 102. By arranging the lifting ring 102, the outer cylinder 1 can be easily carried and transferred by external equipment by the worker, which is convenient to operate.

[0033] When drilling, the worker inserts the outer cylinder 1 into the drilling site by the rotary drilling device and inserts it into the ground by the vibration hammer, and then inserts the inner cylinder 2 into the outer cylinder 1 and lowers it along the drilling site by the vibration hammer. The limiting mechanism on the outer cylinder 1 limits the inner cylinder 2 during the lowering process to ensure that the inner cylinder 2 is axially aligned with the drilling direction. When the rotary pile hole is deep, the worker can splice multiple groups of inner cylinders 2 according to the drilling depth. The recess 201 and the snap ring between adjacent inner cylinders 2 are embedded to align the threaded hole 202 with the clamping groove 203 on the snap ring. Then the worker rotates the adjusting rod in the threaded hole 202 to insert one end of the adjusting rod into the clamping groove 203 to limit it, preventing the snap ring from detaching from the recess 201 after splicing, ensuring the stability of the splicing. It is suitable for protecting drilling holes of different depths and improves the scope of application. When the inner cylinder 2 is pulled out, the worker rotates the adjusting rod in the threaded hole 202 to disengage it from the clamping groove 203, which can disassemble multiple groups of inner cylinders 2 for repeated use.

[0034] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art will understand that the technical solutions described in the foregoing examples can be modified or some technical features can be replaced by equivalent ones. The modification or replacement does not deviate the essence of the corresponding technical solution from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A steel casing structure for rotary drilling piles, characterized in that: include The outer cylinder has a through hole, and an inner cylinder is inserted into the through hole. There are multiple sets of inner cylinders stacked sequentially along the axial direction. The top of the inner cylinder has a groove, and the inner wall of the groove has multiple sets of threaded holes spaced apart along the circumference. An adjusting rod is inserted into the threaded holes. The bottom of the inner cylinder has a retaining ring that matches the groove. The outer wall of the retaining ring has a retaining groove that aligns with the threaded holes. It also includes a limiting mechanism, which is disposed on the outer cylinder.

2. The steel casing structure for rotary drilling piles according to claim 1, characterized in that: The limiting mechanism includes limiting plates, which are configured in multiple sets and spaced apart circumferentially along the through hole.

3. The steel casing structure for rotary drilling piles according to claim 2, characterized in that: The limiting plate has multiple sets of countersunk holes along the vertical direction on the side near the inner cylinder, and pulleys are rotatably installed in the countersunk holes.

4. The steel casing structure for rotary drilling piles according to claim 2, characterized in that: A baffle plate is fixedly installed on the inner wall of the through hole. The baffle plate is circular and has a slot for fitting with the limiting plate.

5. The steel casing structure for rotary drilling piles according to claim 4, characterized in that: The limiting plate is inclined on one side of the top of the baffle.

6. The steel casing structure for rotary drilling piles according to claim 4, characterized in that: Both the baffle and the limiting plate are provided with rubber pads on the side closest to the inner cylinder.

7. The steel casing structure for rotary drilling piles according to claim 1, characterized in that: The length of the outer cylinder is greater than the length of the inner cylinder.

8. The steel casing structure for rotary drilling piles according to claim 1, characterized in that: A lifting ring is fixedly installed at the top of the outer cylinder.

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