CN205778549U - A soil-squeezing reaming pile drilling tool - Google Patents

Abstract

The utility model provides a crowded native reaming stake drilling tool. Including enlarging the head, the outer tube of inner tube is located including flaring tooth, inner tube and cover to the enlarged head, just the inner tube with the urceolus interval sets up, the inner tube includes buckling parts, the urceolus includes spacing portion and stretches out the mouth, spacing portion quantity be two and interval form in on the internal periphery of urceolus, buckling parts form in just the card is located two on the external periphery of inner tube between the spacing portion, stretch out the mouth for running through the through-hole of urceolus, the flaring tooth include with the connecting portion of inner tube activity with certainly connecting portion extend and insert the flaring portion that stretches out the mouth. The utility model discloses an enlarged footing sets up the bilayer structure into inner tube and urceolus, locates the inner tube with the flaring tooth, and utilizes the rotation of enlarged footing, the control flaring tooth stretch out and contract, accomplish the flaring to different soil property.

Description

A soil-squeezing reaming pile drilling tool

【Technical field】

The utility model relates to the field of construction engineering, in particular to a soil-squeezing and reaming pile drilling tool.

【Background technique】

At present, in foundation projects such as construction, water conservancy, and highways, double-helix extruded piles are currently the most commonly used form of pile foundation. The soil that is drilled out of the hole will be squeezed into the side wall of the pile hole, and then the two-way helical closed extrusion drill bit will move upwards and rotate again to squeeze and expand the pile hole. Squeeze into the side wall of the pile hole, and start the concrete pump to press the pile material into the pile hole while the topspin is lifted. The main problem is that the soil is rotary excavated first, then transported upwards and then squeezed to the pile walls on both sides. Therefore, the rotated soil will block the transportation path formed by the rotating blades, and it is easy to cause the drilling phenomenon. Moreover, the discharged earth or mud increases the difficulty and progress of pile construction.

With the increase of building height, the foundation pile length gradually increases, and the difficulty of pile foundation construction is also increasing. The bearing capacity of cast-in-situ piles used in existing pile foundation construction is mainly composed of pile end soil resistance and pile side soil friction; Piles may not meet the requirements.

Therefore, it is necessary to provide a soil-squeezing reaming pile drilling tool used under complex geological conditions.

【Content of utility model】

The purpose of the utility model is to provide a soil-squeezing reaming pile drilling tool.

The technical scheme of the utility model is as follows:

A soil-squeezing reaming pile drilling tool, comprising a drill pipe with a drill bit and an expanding head sleeved on the drill bit, the expanding head includes flared teeth, an inner cylinder and an outer cylinder sleeved on the inner cylinder, and the The inner cylinder and the outer cylinder are arranged at intervals, the inner cylinder includes a buckle portion, the outer cylinder includes a limiting portion and a protruding opening, and the number of the limiting portions is two and formed at intervals on the inner periphery of the outer cylinder Above, the buckle part is formed on the outer peripheral edge of the inner cylinder and is clamped between the two limiting parts, the protruding opening is a through hole penetrating the outer cylinder, and the flaring teeth include A connecting part movable with the inner cylinder and a flaring part extending from the connecting part and inserted into the protruding opening; the drill pipe also includes a body, a blocking ring and a helical column connected in sequence, and the helical column is connected from the The drill bit is extended, the body, the stop ring, the screw column and the drill bit are arranged concentrically, the inner diameter of the stop ring is larger than the screw post and the body, and the thread depth around the outer wall of the screw post is greater than the depth of the screw thread The thread on the outer wall of the blocking ring.

Preferably, the thread circumference of the outer wall of the blocking ring is the same as the thread circumference of the outer wall of the helical column.

Preferably, the inner cylinder and the outer cylinder are hollow cylinders with concentric axes.

Preferably, the inner cylinder and the outer cylinder pass through the limiting portion and the buckle portion and rotate coaxially in opposite directions within an arc length between the two limiting portions.

Preferably, the length of the arc chord between the two limiting parts is smaller than the length of the flaring part.

Preferably, through the relative rotation of the inner cylinder and the outer cylinder, the flaring portion protrudes and contracts along the direction of the protruding opening.

Preferably, the limiting portion and the locking portion are formed on the same horizontal plane.

The beneficial effects of the utility model are:

1. The structure of the blocking ring squeezes the hole wall of the extruded and expanded pile for the second time, preventing the soil from being screwed out during the pile forming process and directly extruded and expanded to form a pile. It has a novel structure, good pile quality, and is not easy to hold back drilling.

2. Environmental protection, no mud discharge, no slag transported outside, no construction dust, no soil storage site, and the surrounding environment will not be polluted.

3. Set the expansion head as a double-layer structure of the inner cylinder and the outer cylinder, set the flaring teeth on the inner cylinder, and use the rotation of the expansion head to control the extension and contraction of the expansion teeth to complete the expansion of different soil properties , the structural design is simple, the cost is low, the effect is good, and it is suitable for mass production and popularization.

【Description of drawings】

Fig. 1 is the structural diagram of the utility model squeezed soil reaming pile drilling tool;

Fig. 2 is the sectional view of the use state one of the enlarging head of the soil-squeezing reaming pile drilling tool shown in Fig. 1;

Fig. 3 is a cross-sectional view of the second use state of the expanding head of the soil-squeezing reaming pile drilling tool shown in Fig. 1 .

【detailed description】

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Please refer to FIG. 1 to FIG. 3 at the same time. The utility model provides a soil-squeezing reaming pile drilling tool 100 , which includes a drill pipe 2 with a drill bit 21 and an expanding head 1 sleeved on the drill bit 21 .

The enlarging head 1 includes flaring teeth 11 , an inner cylinder 12 and an outer cylinder 13 sleeved on the inner cylinder 12 , and the inner cylinder 12 and the outer cylinder 13 are arranged at intervals.

The inner barrel 12 includes a locking portion 121 .

The outer cylinder 13 includes a limiting portion 131 and an extension opening 133, the number of the limiting portions 131 is two and formed at intervals on the inner peripheral edge of the outer cylinder 13, and the buckle portion 121 is formed on the inner cylinder On the outer peripheral edge of the outer cylinder and clamped between the two limiting parts 131 , the extension opening 133 is a through hole penetrating through the outer cylinder 13 .

The flaring tooth 11 includes a connecting portion 111 movable with the inner barrel 12 and a flaring portion 112 extending from the connecting portion 111 and inserted into the protruding opening 133 .

The inner cylinder 12 and the outer cylinder 13 are hollow cylinders with concentric axes; The length of the circular arc between the two limiting parts 131 rotates coaxially in opposite directions; specifically, the length of the chord of the arc between the two limiting parts 131 is smaller than the length of the flaring part 112 .

Through the relative rotation of the inner cylinder 12 and the outer cylinder 13 , the flaring portion 112 protrudes and contracts along the direction of the protruding opening 133 .

The limiting portion 131 is formed on the same level as the locking portion 121 .

The outer cylinder 13 is integrally formed; the inner cylinder 12 is integrally formed.

A hinge 14 is also included, and the hinge 14 connects the flaring teeth 11 and the inner cylinder 12 .

In this embodiment, in FIG. 2 , the drill rod drives the inner cylinder 12 to rotate counterclockwise, and the arc length of the outer cylinder 13 between the two limiting portions 131 through the buckle portion 121 Rotate clockwise within the range; make the flaring part 112 shrink along the direction of the protruding opening 133 .

In FIG. 3 , the drill rod drives the inner cylinder 12 to rotate clockwise, and the outer cylinder 13 rotates counterclockwise within the arc length range between the two limiting portions 131 through the buckle portion 121 ; The flaring portion 112 shrinks along the direction of the protruding opening 133 .

The drill rod 2 also includes a body 22, a blocking ring 23 and a helical column 24 which are connected in sequence. The central axis is set, the inner diameter of the blocking ring 23 is larger than that of the screw post 24 and the body 2 , and the thread 241 surrounding the outer wall of the screw post 24 is deeper than the thread 231 on the outer wall of the blocking ring 23 .

Further, the circumference diameter of the thread 231 on the outer wall of the blocking ring 23 is the same as the circumference diameter of the thread 241 on the outer wall of the helical column 241 . This structure ensures that during the piling process of the soil-squeezing reaming pile drilling tool 100, the structure of the blocking ring 23 will squeeze the hole wall of the pile that has been squeezed and expanded for the second time, preventing the soil from being screwed out directly during the pile-forming process. Squeeze and expand into piles.

Preferably, the height ratio of the barrier ring 23 and the screw column 24 is preferably 7:25, and the actual size requirements, the height of the barrier ring 23 is 70cm, and the height of the screw column 24 is 250cm, which can ensure that the squeezed The expanded pile hole depth meets the design requirements, and it also ensures that the screw column 24 squeezes the hole wall of the expanded pile for the second time, preventing the pile from being screwed out and directly extruded and expanded into piles.

The beneficial effects of the utility model are: the structure of the blocking ring is added, and the blocking ring performs a second extrusion on the hole wall of the extruded and expanded pile, preventing the soil from being unscrewed and directly extruded and expanded into a pile during the pile forming process. Novel, good pile quality, not easy to hold back the drill; the soil between the piles has a compaction effect, the pile bearing capacity is high, and the surrounding environment will not be polluted; and the expanding head is set as a double-layer structure of the inner cylinder and the outer cylinder , set the flaring teeth on the inner cylinder, and use the rotation of the expanding head to control the extension and contraction of the flaring teeth, so as to complete the flaring of different soil properties. This structure has simple design, low cost, good effect, and is suitable for mass production and promotional use.

What has been described above is only the embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, improvements can also be made without departing from the inventive concept of the utility model, but these all belong to Protection scope of the present utility model.

Claims (7)

1. A soil-squeezing reaming pile drilling tool is characterized in that: it comprises a drill pipe with a drill bit and an enlarging head sleeved on the drill bit, and the enlarging head includes flared teeth, an inner cylinder and an enlarging head sleeved on the inner cylinder. An outer cylinder, and the inner cylinder and the outer cylinder are arranged at intervals, the inner cylinder includes a buckle part, the outer cylinder includes a limiting part and an extension opening, and the number of the limiting parts is two and formed at intervals On the inner peripheral edge of the outer cylinder, the buckle part is formed on the outer peripheral edge of the inner cylinder and is clamped between the two limiting parts, and the protruding opening is a through hole penetrating the outer cylinder , the flared tooth includes a movable connection portion with the inner cylinder and a flared portion extending from the connection portion and inserted into the protruding opening; The drill rod also includes a body, a blocking ring and a helical column connected in sequence. The helical post is formed by extending from the drill bit. The body, the blocking ring, the helical post and the drill bit are arranged with the central axis. It is larger than the screw column and the body, and the thread depth around the outer wall of the screw column is greater than the thread depth of the outer wall of the blocking ring. 2. The soil-squeezing reaming pile drilling tool according to claim 1, characterized in that: the thread circumference of the outer wall of the barrier ring is the same as the thread circumference of the outer wall of the screw column. 3. The soil-squeezing reaming pile drilling tool according to claim 1, characterized in that: the inner cylinder and the outer cylinder are hollow cylinders with concentric axes. 4. The soil-squeezing reaming pile drilling tool according to claim 3, characterized in that: the inner cylinder and the outer cylinder pass through the limiting part and the buckle part and are in the position between the two limiting parts. Reverse coaxial rotation within the arc length range between the parts. 5. The soil-squeezing reaming pile drilling tool according to claim 3, characterized in that: the length of the arc chord between the two limiting parts is smaller than the length of the flared part. 6. The soil-squeezing reaming pile drilling tool according to claim 1, characterized in that: through the relative rotation of the inner cylinder and the outer cylinder, the flaring part extends and contracts along the direction of the protruding opening . 7 . The soil-squeezing reaming pile drilling tool according to claim 1 , characterized in that: the limiting portion and the locking portion are formed on the same horizontal plane. 8 .