CN201190537Y

CN201190537Y - Pneumatic expanding bit

Info

Publication number: CN201190537Y
Application number: CNU2008200127750U
Authority: CN
Inventors: 赵殿有; 陆清有; 杨建立; 兰立志; 宁甲旭; 佟宝华; 闫丰; 李明思
Original assignee: Liaoning Non-Ferrous No101 Geological Exploration Engineering Co
Current assignee: Liaoning Non-Ferrous No101 Geological Exploration Engineering Co
Priority date: 2008-05-15
Filing date: 2008-05-15
Publication date: 2009-02-04
Anticipated expiration: 2018-05-15

Abstract

The utility model discloses a pneumatic ream bit used by a development anchor rod, an anchor rope and a pile fixation hole. The utility model is characterized in that a drill pipe is internally provided with an air cylinder body, a core rod in the air cylinder body is fixed on a piston, the lower part of the core rod penetrates out of an air cylinder, and the lower end is provided with a cutting mechanism. When an air inlet pipe above the air cylinder body inflates air into the air cylinder body, the piston drives the core rod to move upwards to enable a cutting vane of the cutting mechanism at the lower end of the core rod to open outward. When the bit rotates, the vane cuts the inner wall of a drilling hole to increase the diameter of the hole. When inflation to the air cylinder body is stopped, the core rod descends, the cutting vane is shrunk, and the increasing hole diameter, the increasing hole position and the increasing hole length can be determined according to the needs, thereby the use is convenient, the accuracy high and the effect is good.

Description

Pneumatic reaming bit

One, technical field

The utility model belongs to the instrument that bores the pick rock-soil layer in the civil engineering, is specifically related to a kind of pneumatic reaming bit that anchor pole, anchor cable and stake fixing hole are used of opening up.

Two, background technology

In multinomial engineerings such as civil construction and geological drilling, often to establish anchor pole, stake and fixing anchor cable, firm in order to make it, be split into the hole that becomes diameter to the hole of fixing anchor bar, stake and anchor cable, promptly orifice diameter is little, and the hole interior diameter is big.At present, the method for expanded hole interior diameter mainly contains: blast reaming, mechanical hole reaming, waterpower reaming and mud jacking reaming.The blast reaming is to lean on quick-fried medicine in hole implode reaming, and certain risk is arranged, and also influential near building, pore size is uncontrollable; Mechanical hole reaming is after getting into desired depth with common drill bit, put into reaming bit again, the hole enlargement blade is under centrifugal action, open blade cutting ground, enlarge internal diameter, this reaming bit needs to be connected with steel strand, the two all is embedded in ground and uses next time, increase cost, and because the stratum difference, counter bore diameter is difficult to guarantee; The waterpower reaming is the water under high pressure reaming that utilizes churning, and the mud jacking reaming is that the common drawback of the two is: stratum difference, reaming difference, restive counter bore diameter by the back-grouting reaming.Above-mentioned in a word several method not only diameter is difficult to control, and the position of reaming can only be in the bottom in hole, and the length of reaming section is also less, for the reaming section being grown or being formed continuous ball, needs the repeated multiple times reaming sometimes, complex operation, and efficient is low.

Three, summary of the invention

The purpose of this utility model is a kind of rational in infrastructure, easy to use, counter bore diameter of design, the controlled pneumatic reaming bit of length and position.

For achieving the above object, the utility model adopts following technical scheme: comprise drilling pipe, be characterized in being equipped with cylinder block in drilling pipe, be connected to air inlet pipe on cylinder block, be equipped with cutting mechanism below; Cylinder block is tightly connected by upper connector, side cylinder sleeve and lower connector and forms, in cylinder block, be equipped with piston and the core bar that is fixed on the piston, the core bar upper and lower end passes upper and lower junctor respectively, and the back-moving spring in upper end and the upper connector in the air chamber is connected, and the lower end is equipped with cutting mechanism.

The utility model is owing to adopted cylinder block and cutting mechanism, it is upper and lower mobile to regulate core bar by gas and back-moving spring, the drive cutting mechanism stretches and carries out reaming or probing, realized that probing, reaming carry out synchronously, need not repeatedly more bit change, simple to operation, improved operating efficiency.Especially be fit to expand length section or the hole of ball continuously; Simultaneously,, can regulate the position of reaming and the length of reaming (highly), guarantee the quality of reaming effectively, and can reaming can both not undertaken because of the different differences that cause counter bore diameter in stratum by predetermined requirement by regulating the lifting of whole drill bit.The utility model reaming bit, reasonable in design, easy to manufacture, cost is low, and consumable accessory is changed convenient, and the precision of existing expanding method reaming is good, high efficiency.

Four, description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is to be the structural representation of cutting mechanism part;

Fig. 3 is the lateral view of Fig. 2;

Fig. 4 is the A-A sectional view of Fig. 2;

Fig. 5 is the B-B sectional view of Fig. 2.

Five, the specific embodiment

As shown in Figure 1, the utility model comprises drilling pipe 2, the cylinder block that is tightly connected and is formed by upper connector 3, side cylinder sleeve 12 and lower connector 13 is installed in drilling pipe 2, is connected to air inlet pipe 1 in the above, is equipped with cutting mechanism in its lower section; Have air inlet pipe 4 on upper connector 3, its upper end communicates with air inlet pipe 1, and the annular slot 21 and the air inlet 19 on the cylinder sleeve 12 of lower end formation between the side cylinder sleeve 12 of drilling pipe 2 and cylinder block communicate with the cylinder block inner chamber.Have air chamber 7 in upper connector 3 lower ends, by cylinder chamber one side, interior dress back-moving spring 5 has on air chamber 7 into and out of tracheae 8; On lower connector 13, have the deslagging cooling hole 20 that communicates with the cylinder block inner chamber; Be equipped with piston 9 and core bar 11 in cylinder block, core bar 11 passes piston 9, and the two is for being sealedly and fixedly connected, and core bar 11 upper ends can penetrate in the air chamber 7, and end nut 6 is connected with back-moving spring 5.After core bar 11 lower ends pass lower connector 13, be equipped with cutting mechanism.As Fig. 2-shown in Figure 5, cutting mechanism is made up of the cutting fin 16 of bending, the connecting rod 15 of the mutual decussate in position, the bottom of lower connector 13 and the pallet 18 of core bar 11 lower ends; At the upper and lower end that is cylindrical pallet 18 and lower connector 13, have mouth through the center and upwards reach downward groove respectively, the both sides of pallet 18 and lower connector 13 grooves are respectively erects

wallboard

22,23; Core bar 11 passes lower connector 13 groove center fixation and is connected center on the pallet 18, makes the round tray 18 can be with core bar 11 upper and lower moving; The top of two cutting fins 16 places in the groove of lower connector 13 respectively, the both sides of core bar 11, and by groove wallboard 22 flexible connections of bearing pin 14 with its both sides, the middle part of two fins 16 is connected with two connecting rod 15 top movable by bearing pin 24 respectively, connecting rod 15 lower ends place in the groove of pallet 18, and each connecting rod 15 flexibly connects by the groove wallboard 23 of bearing pin 25 with its outside.Be equipped with carbide-tipped cutter bit 17 on cutting fin 16, number in the figure 10 is a sealing ring.

The following describes the course of work: at first the utility model is connected with hollow drill during use, the inner chamber of hollow drill is communicated with air inlet pipe 1, and in this drill bit, feed high-pressure blast with this.When the air inlet pipe 4 of high-pressure blast on air inlet pipe, upper connector 3, again through the slit 21 and cylinder sleeve air inlet 19 when entering in the cylinder, the moving core bar 11 of shipper pole rises on the piston 9, this moment, two connecting rods, 15 promotion cutting fins 16 outwards opened, make cutting diameter become big, under the acting in conjunction of flywheel moment and centrifugal force, cylinder, air inlet pipe 1, core bar 11 and the cutting mechanism of forming the drilling pipe 2 of drill bit rotate together, fin 16 cutting hole walls enlarge the aperture.After the blowing-out, drill bit stops operating, and core bar 11 moves down under back-moving spring 5 return force functions in air chamber 7, and two fins of two connecting rod 15 pullings 16 draw in and reset.This drill bit can expand the hole of different-diameter according to need, can also be upper and lower arbitrarily mobile in the hole, so the diameter of reaming, position and length are all unrestricted, easy to use, and the efficient height, quality is good.

Claims

1, a kind of pneumatic reaming bit comprises drilling pipe (2), it is characterized in that being equipped with cylinder block in drilling pipe (2), is connected to air inlet pipe (1) on cylinder block, is equipped with cutting mechanism below; Cylinder block is tightly connected by upper connector (3), side cylinder sleeve (12) and lower connector (13) and forms, in cylinder block, be equipped with piston (9) and be fixed on core bar (11) on the piston (9), core bar (11) upper and lower end passes upper and lower junctor (3), (13) respectively, the upper end is connected with back-moving spring (5) in the interior air chamber of upper connector (3) (7), and the lower end is equipped with cutting mechanism.

2, pneumatic reaming bit according to claim 1, it is characterized in that on upper connector (3), having air inlet pipe (4), its upper end communicates with air inlet pipe (1), and the annular slot (21) of lower end formation between the side cylinder sleeve (12) of drilling pipe (2) and cylinder block and the air inlet (19) on the cylinder sleeve (12) communicate with cylinder inner cavity.

3, pneumatic reaming bit according to claim 1 is characterized in that having into and out of tracheae (8) on air chamber (7).

4, pneumatic reaming bit according to claim 1 is characterized in that having deslagging cooling hole (20) on lower connector (13).

5, pneumatic reaming bit according to claim 1 is characterized in that cutting mechanism is made up of cutting fin (16), the cross one another connecting rod in position (15), the bottom of lower connector (13) and the pallet (18) of core bar (11) lower end of bending; At the upper and lower end of pallet (18) and lower connector (13), have mouth and upwards reach downward groove respectively, the both sides of pallet (18) and lower connector (13) groove are respectively erects wallboard (22), (23); Core bar (11) pass lower connector (13) be fixedly connected on pallet (18) on; The top of two cutting fins (16) places in the groove of lower connector (13) respectively, the both sides of core bar (11), and by groove wallboard (22) flexible connection of bearing pin (14) with its both sides, wherein portion is connected with connecting rod (15) top movable by bearing pin (24) respectively, connecting rod (15) lower end places in the groove of pallet (18), and flexibly connects by bearing pin (25) and groove wallboard (23).