CN204920798U - Can receive a formula both wings ream bit - Google Patents

Abstract

The utility model discloses a retractable two-wing reaming drill bit, which comprises an upper support, a wing, a support plate, a lower support, and a sliding sleeve. The upper support and the wing are connected by a pin shaft of the support, and the lower support It is connected with the support plate through the support pin, the wings and the support plate are connected through the support pin, the sliding sleeve is connected with the drill rod to form a reaming drill bit, and the bucket chassis of the retractable two-wing reaming drill is placed on the reached For the rotary excavation pile bottom at the design elevation, the self-weight of the drill pipe and the retractable two-wing reaming bit is supplemented by a certain pressure, so that the two-wing chain rods are opened at a certain angle, continuously rotating and cutting the soil layer or rock layer, and lifted by the bucket chassis. After drilling, the cut soil or rock slag is cleared out of the hole to achieve the purpose of reaming the bottom of the rotary excavation pile, meet the operation requirements, and ensure construction safety.

Description

A retractable two-wing reaming drill bit

technical field

The utility model relates to the technical field of mechanical bottom expansion and hole forming of rotary excavation piles in the construction field, in particular to a retractable two-wing reaming drill bit.

Background technique

In order to improve the bearing capacity of the foundation, many foundations of buildings are constructed with pile foundations. Pile foundations are divided into prefabricated piles and cast-in-situ piles according to the construction method. The cast-in-place piles include manual digging piles, bored piles, impact hole-forming piles, and rotary-dug piles according to the hole-forming form. Rotary excavation piles are widely used in urban construction projects due to their advantages of safe construction, fast construction, high precision, low noise, environmental protection, high single pile bearing capacity, and convenient construction. In order to achieve a higher bearing capacity of the rotary-dug pile foundation, it is necessary to increase the area of the pile tip. The current domestic rotary-dug piles are all made of mechanical rotary-dug holes, and the hole-forming diameters of the piles are consistent from top to bottom and cannot be changed. How to make the rotary-excavation pile achieve the effect similar to that of the manually-excavated hole-expanding cast-in-place pile is the root of the improvement of the rotary-excavation pile process.

Utility model content

In order to overcome the problem that the hole diameter of the rotary excavation pile is consistent from top to bottom and cannot be changed, the utility model provides a retractable two-wing reaming drill bit. The bucket chassis of the retractable two-wing reaming drill bit is placed on the designed For the rotary excavation of the pile bottom at high elevations, the self-weight of the drill pipe and the retractable two-wing reaming bit is supplemented by a certain pressure, so that the two-wing chain rods are opened at a certain angle, continuously rotated to cut the soil layer or rock layer, and the drill is lifted through the bucket chassis Finally, the cut soil or rock slag is cleared out of the hole to achieve the purpose of reaming the bottom of the rotary excavation pile, meet the operation requirements, and ensure construction safety.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the utility model is as follows:

A retractable two-wing reaming drill bit, including an upper support, a lower support, and a bucket chassis. The blade and the support plate are connected by the pin shaft of the support to form a two-wing chain rod; the blade and the support plate are distributed with cutting teeth, and the drill pipe is fixedly installed on the upper support. The drill pipe slides and fits into the sliding sleeve to form an expansion The upper part of the sliding sleeve is welded with a support plate, the lower part is welded with a lower support, and the support plate, the lower support and the outer wall of the sliding sleeve are respectively connected with reinforcing ribs.

The lower support includes two connecting plates symmetrically welded to the sliding sleeve, and the connecting plates are connected with the support plate through the support pin.

An end plate is installed at the bottom of the sliding sleeve, and pin holes are formed on the edge of the end plate.

The beneficial effects of the utility model are as follows:

The utility model drops the bucket chassis of the retractable two-wing reaming drill on the bottom of the rotary excavation pile that has reached the design elevation, and uses the self-weight of the drill pipe and the retractable two-wing reaming drill with a certain pressure to make the two-wing chain Open the rod at a certain angle, rotate continuously to cut the soil layer or rock layer, and clear the cut soil or rock residue out of the hole after lifting the drill through the bucket chassis, so as to achieve the purpose of reaming the hole at the bottom of the rotary excavation pile, meet the operation requirements, and ensure construction Safety.

Description of drawings

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

Fig. 1 is the structural representation of the utility model.

Detailed ways

Referring to the accompanying drawings, a retractable two-wing reaming drill bit includes an upper support 1, a lower support 2, and a bucket chassis 16. The upper support 1 and the wings 3 are connected by a support pin 8, and the lower support 2 It is connected with the support plate 4 through the support pin shaft 10, and the fin 3 is connected with the support plate 4 through the support pin shaft 9 to form a two-wing chain rod; 1 is fixedly installed with a drill pipe 7, and the drill pipe 7 is slidably matched with the sliding sleeve 11 to form a reaming drill; 2. Rib plates 12 and 13 are respectively connected to the outer wall of the sliding sleeve 11.

The lower support 2 includes two connecting plates symmetrically welded to the sliding sleeve. The connecting plates are connected to the support plate through the support pin shaft. The bottom end of the sliding sleeve 11 is equipped with an end plate with a pin hole 15 on the edge of the end plate.

When the utility model is used, the retractable two-wing reaming drill bit is manufactured according to the above method, and then the bucket chassis of the retractable two-wing reaming drill bit is dropped on the bottom of the rotary excavation pile that has reached the design level, and the drill rod, The self-weight of the retractable two-wing reaming drill bit is supplemented by a certain pressure, so that the two-wing chain rods are opened at a certain angle, continuously rotating to cut the soil layer or rock layer, and the cut soil or rock residue is cleared out after the drill is lifted by the bucket chassis Outside the hole, the purpose of reaming the bottom of the rotary excavation pile is achieved, which meets the operation requirements and ensures construction safety.

Claims (3)

1. A retractable two-wing reaming drill bit, comprising an upper support, a lower support, and a bucket chassis, is characterized in that the upper support and the wings are connected by the support pin, and the lower support and the support plate are connected by the support plate. The seat pin is connected, and the wing and the support plate are connected by the support pin to form a two-wing chain rod; the wing and the support plate are distributed with soil cutting gears, and the upper support is fixedly installed with a drill pipe, which slides and fits with the A reaming drill bit is formed in the sliding sleeve; a support plate is welded on the upper part of the sliding sleeve, and a lower support is welded on the lower part, and reinforcing rib plates are respectively connected between the support plate and the lower support and the outer wall of the sliding sleeve. 2. The retractable two-wing reaming drill bit according to claim 1, characterized in that the lower support includes two connecting plates symmetrically welded to the sliding sleeve, and the connecting plates pass through the support pin and the supporting plate connected. 3. The retractable two-wing reaming drill bit according to claim 1, wherein an end plate is installed at the bottom of the sliding sleeve, and pin holes are formed on the edge of the end plate.