CN204729009U - Pile foundation revolve drilling construction scouring bit - Google Patents

Abstract

The utility model discloses a hole clearing drill bit for pile foundation rotary excavation construction, which comprises a hole clearing bit body and a drill rod coaxially fixedly connected with the hole clearing bit body; The central rod inserted into the outer barrel and the helical blade fixed on the outer cylindrical surface of the central rod and contained in the outer barrel; the drill rod is fixed on the central rod. The structure of this device is simple, and it is different from the existing The drill pipe and other devices equipped with the rotary drilling rig are highly versatile. When in use, the drilling and hole cleaning drill bits can be replaced at any time, and the hole can be cleaned quickly. It is suitable for construction techniques such as mud wall drilling and dry drilling, and can ensure that The requirements of the acceptance standard for the thickness of pile bottom ballast can effectively avoid pile foundation quality problems caused by insufficient cleaning of pile foundation holes and excessive ballast thickness.

Description

Pile Foundation Rotary Excavation Construction Hole Clearing Drill Bit

technical field

The utility model relates to the field of building pile foundation devices, in particular to a special drill bit for clearing holes in building rotary excavation pile foundation construction.

Background technique

The rotary excavation construction technology of building pile foundation is favored by the engineering community because of its fast pile formation speed. However, at this stage, there are major problems in rotary excavation construction. The thickness of pile foundation dregs is difficult to control, and most of them exceed the current acceptance specifications , can easily cause pile foundation quality accidents.

Therefore, the purpose of this utility model is to develop a kind of building pile foundation rotary excavation construction hole clearing drill bit to ensure that the clearing hole sinking dregs meets the specification requirements.

Utility model content

In view of this, the purpose of this utility model is to develop a kind of guarantee to meet the requirements of pile bottom ballast thickness acceptance standard. The drill bit for pile foundation rotary excavation construction can effectively avoid pile foundation quality problems caused by pile foundation cleaning holes not in place and ballast thickness exceeding the standard.

A hole cleaning drill for pile foundation rotary excavation construction according to the utility model comprises a hole cleaning drill body and a drill rod coaxially fixedly connected with the hole cleaning drill body; the hole cleaning drill body includes an outer barrel, which is inserted axially The central rod in the outer barrel and the helical blade fixed on the outer cylindrical surface of the central rod and contained in the outer barrel; the drill rod is fixed on the central rod;

Further, one end of the center rod is provided with a slot with a rectangular section, and one end of the drill rod is provided with a connection section that matches the slot, and the connection section is fixedly connected to the center rod through a fixing pin;

Further, the lower end surface of the outer barrel is provided with a slag removal port; the spiral blade extends out of the outer barrel from the slag removal port;

Further, the central rod is provided with a connection plate, and a fastening screw is provided between the upper end surface of the outer barrel and the connection plate;

Further, the lower end of the central rod is provided with a tip for piercing into drilling slag.

Beneficial effects of the utility model: the drill bit for pile foundation rotary excavation construction of the utility model has strong versatility with the drill pipes and other devices equipped with the existing rotary drilling rig. When in use, the drilling and hole clearing drill bits can be replaced at any time. Rapid hole cleaning is suitable for construction techniques such as mud wall drilling and dry drilling, and can ensure that the acceptance standard for the thickness of pile bottom dregs is met. Effectively avoid pile foundation quality problems caused by pile foundation hole cleaning not in place and ballast thickness exceeding the standard.

Description of drawings

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

Fig. 1 is the drill bit helical blade schematic diagram of the present utility model;

Fig. 2 is a schematic diagram of the bottom plane of the drill bit of the present invention.

Detailed ways

Fig. 1 is a schematic diagram of a drill helical blade of the present utility model; Fig. 2 is a schematic diagram of a bottom plane of a drill bit of the present utility model; The drill pipe 1 coaxially fixedly connected to the hole cleaning drill body; the hole cleaning drill body includes an outer barrel 6, a central rod 7 axially inserted into the outer barrel 6, and an outer cylinder fixed to the central rod 7 surface and contained in the helical blade 5 in the outer barrel 6; the drill rod 1 is fixed on the center rod 7, and the pile foundation rotary excavation construction hole cleaning drill bit of the utility model is matched with the existing rotary drilling rig Drill pipe 1 and other devices have strong versatility. When in use, the drilling and hole cleaning drill bits can be replaced at any time, and the hole can be cleaned quickly. It is suitable for construction techniques such as mud wall drilling and dry drilling, and can ensure that the thickness of the pile bottom is reached. According to the requirements of the acceptance standard, the drilling slag is screwed into the outer barrel 6 by the positive rotation of the drilling bit to realize the cleaning of the ballast. Realize slag removal repeatedly in this way. Effectively avoid pile foundation quality problems caused by pile foundation hole cleaning not in place and ballast thickness exceeding the standard.

In this embodiment, one end of the central rod 7 is provided with a slot 3 with a rectangular section, and one end of the drill rod 1 is provided with a connecting section 2 that matches the slot 3 and the connecting section 2 is connected to the central rod through a fixing pin 11. 7 Fixed connection, when connecting, insert the connecting section 2 into the slot 3, the connecting section 2 and the side wall of the slot 3 are provided with connecting holes, and the fixing pin 11 passes through the connecting holes to realize the fixed connection.

In this embodiment, the lower end surface of the outer barrel 6 is provided with a slag removal port 12; the helical blade extends out of the outer barrel 6 from the slag removal port 12, and after rotating the hole cleaning drill bit, the protruding helical blade uses The principle of screw conveying transports the drilling slag into the outer barrel 6 .

In this embodiment, the central rod 7 is provided with a connection plate 4, and a fastening screw 10 is provided between the upper end surface of the outer barrel 6 and the connection plate 4. The fastening screw 10 fixes the outer barrel 6 and the central rod 7. After the outer barrel 6 is filled with drilling slag, the fastening screw 10 can be removed to make the central rod 7 and the outer barrel 6 rotate relatively, so that the drill in the outer barrel 6 The slag is discharged, or the outer barrel 6 is directly removed from the center rod 7, and the slag is manually discharged. The upper end surface of the outer barrel is provided with a vent hole 9 for discharging air and mud.

In this embodiment, the lower end of the central rod 7 is provided with a tip 8 for piercing into the drilling slag, and the hole clearing drill body can be completely penetrated into the drilling slag by using the tip 8 .

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the spirit and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (5)

1. a pile foundation revolve drilling construction scouring bit, is characterized in that: the drilling rod comprising scouring bit body and be coaxially fixedly connected with described scouring bit body; Described scouring bit body comprises outer barrel, inserts the center-pole in described outer barrel and be fixed on described center-pole external cylindrical surface and the helical blade be contained within described outer barrel vertically; Described drilling rod is fixed on described center-pole.

2. pile foundation revolve drilling construction scouring bit according to claim 1, it is characterized in that: described center-pole one end is provided with square-section slot, described drilling rod one end is provided with the linkage section that coordinates with this slot and this linkage section is fixedly connected with center-pole by a steady pin.

3. pile foundation revolve drilling construction scouring bit according to claim 1, is characterized in that: described outer barrel lower surface is provided with breast hole; Described helical blade extends outer barrel from described breast hole.

4. pile foundation revolve drilling construction scouring bit according to claim 1, is characterized in that: described center-pole is provided with terminal pad, is provided with trip bolt between described outer barrel upper surface and described terminal pad.

5. pile foundation revolve drilling construction scouring bit according to claim 1, is characterized in that: described center-pole lower end is provided with top for what thrust in boring mud.