CN201786251U

CN201786251U - A combined down-hole hammer

Info

Publication number: CN201786251U
Application number: CN 201020550979
Authority: CN
Inventors: 钱奂云; 何清华; 朱建新; 邓超; 张鹏; 李海舰
Original assignee: Hunan Sunward Intelligent Machinery Co Ltd
Current assignee: Hunan Sunward Intelligent Machinery Co Ltd
Priority date: 2010-09-30
Filing date: 2010-09-30
Publication date: 2011-04-06
Anticipated expiration: 2020-09-30

Abstract

The utility model discloses a combined down-hole hammer. The down-hole hammer comprises a coupling member, a support (3), and a plurality of impactors (3) with little diameter mounted onto the support body (4). The coupling member is a joint body in the cylindrical shape. The joint body in the cylindrical shape is intersected with the joint in the cylindrical shape, and is fixed through at least one pin shaft and a sealing mat. The utility model is a combined down-hole hammer with relatively low cost, reasonable structure, easy maintenance, convenient mounting and dismounting, reliable sealing, effective use of energy, and high boring efficiency.

Description

A kind of combined type down-the-hole hammer

Technical field

The utility model relates to a kind of down-the-hole hammer, specifically, relates to a kind of combined type down-the-hole hammer that can punch, construct foundation pile at hardpan and rock stratum.

Background technology

Foundation pile construction uses rig to drive drill bit at earth-boring usually, puts reinforcing cage, concrete placing then in the hole, becomes foundation pile after the concrete setting; But run into hardpan particularly during the rock stratum, very difficult with bit bore, and to use a kind of impactor (also claiming the down-the-hole hammer) to carry out percussion drilling, because impactor has the function in the punching of hard rock floor height efficient, thereby in mining, construction foundation working, be widely used.

This by known (" Chinese winning equipment handbook-first volume " the 1st chapter of publishing as Science Press the 66th page～the 68th page deliver) impactor, also be commonly referred to as monolithic down-the-hole hammer in the industry, to form by taper thread joint 61, the impactor body 62 that contains piston, the drill hammer 64 that has a hard alloy head 63, its diameter is general≤φ 300mm; As shown in Figure 7.The down-the-hole hammer is connected with the unit head of rig by hollow drill during construction, unit head drives the rotation of down-the-hole hammer, the compressed air that is provided by air compressor machine enters the impactor body by drilling rod, the driven plunger high-frequency is back and forth hit drill bit, impact energy is passed on and is back and forth impacted rock to the drill bit hard alloy head and make it broken, the gas that the disintegrating slag of rock is discharged with the down-the-hole hammer is discharged by the annular gap between drilling rod and the hole wall, the final stake hole that forms.

Its advantage is: particularly can high efficiency punch the rock stratum at hardpan, but development along with the pile foundation construction industry, when punching had more demand to major diameter foundation pile (φ 500～φ 800mm and＞φ 1000mm), this monolithic down-the-hole hammer showed following deficiency:

1, the requirement of major diameter monolithic down-the-hole hammer processing technology is high, manufacture difficulty greatly, easily goes out quality problems, manufacturing cost is higher;

2, because volume is heavy greatly again, maintenance and repair inconvenience in case certain alloy head breakage on the drill bit in the work just must integral body be pulled down and reprocessed, promptly delays the duration, and expense is also higher;

3,, connect the whole rotation of needs in the mode of taper thread joint, and need very big moment of torsion just can tighten and make it to reach required sealing, installing/dismounting inconvenience at the scene because big, the quality of diameter is heavy.

For solving the above-mentioned deficiency of major diameter monolithic down-the-hole hammer, United States Patent (USP): US 4429439 has announced another kind of cluster type down-the-hole hammer; As Figure 14 and shown in Figure 15, the impactor of 5 minor diameters constitutes large diameter down-the-hole hammer by the framework boundling together, be connected with drilling rod and air inlet road by the taper thread joint, and compressed air be assigned to each little impactor, drive it and carry out the percussion drilling operation by horizontal gas circuit.

But the weak point of this boundling down-the-hole hammer is:

1, because boundling down-the-hole hammer diameter is big, quality heavy, the mode with the taper thread joint connects the whole rotation of needs equally, and need very big moment of torsion just can tighten and make it to reach required sealing, installing/dismounting inconvenience at the scene;

The turning was close to the right angle when 2, compressed air entered impactor by horizontal gas circuit, and the pressure loss is big, and efficient is low;

3, according to the layout of minor diameter impactor, the impactor of the impactor ratio periphery at center is under same rotating condition, the perforated area difference that is covered, frequency of impact (acting) should be different, but identical, the flow of air pressure is divided equally in its gas circuit, do not have regulatory function, can not effectively utilize energy, efficient is low.

The utility model content

Technical problem to be solved in the utility model provide a kind of cost lower, rational in infrastructure, safeguard easily, easy installation and removal, sealing reliably, effectively utilize energy, perforating efficiency is high combined type down-the-hole hammer.

In order to solve the problems of the technologies described above, the combined type down-the-hole hammer that the utility model provides, comprise hookup, stake body and be installed in the impactor of the plural minor diameter on the stake body, described hookup is the cylindricality fittings body, and the cylindricality joint of described cylindricality fittings body and drilling rod is pegged graft and fixed by at least one bearing pin and sealing mat.

Described cylindricality fittings body is the hexahedron column construction, pegs graft fixing by interior six square joints of 2 bearing pins and sealing mat and drilling rod.

Divide device of air one end to be connected with described stake body, the other end is connected with described hookup, device of air was provided with collection chamber in described minute, described collection chamber is provided with the branch gas circuit that is communicated with described impactor, the described minute gas circuit that is connected with the described impactor of periphery setting is the deep camber gas circuit structure, and the described minute gas circuit that is connected with the described impactor of center setting is bypass structure.

Described minute device of air is provided with the adjusting device of adjustable gas pressure and gas flow.

The joint of described impactor 4 is cylinders of band groove, and several described impactors 4 insert the upper plate of described stake body and the locating hole of base plate respectively, are connected the location with stake body by locating ring; The joint ring position of dividing device of air is inserted in described cylindrical joint end, is connected and fixed with dividing device of air by bolt.

Adopt the combined type down-the-hole hammer of technique scheme, have following good effect and advantage:

1, the impactor by several minor diameters constitutes large diameter combined type down-the-hole hammer, and it is rational in infrastructure, manufacturing process is simple, maintenance is easy, cost is low;

2, combined type down-the-hole hammer is fixed by bearing pin and sealing mat grafting with adopting the cylindricality fittings body being connected of drilling rod, and the reliability of easy installation and removal, gas circuit sealing improves;

3, branch gas circuit straight-through or the deep camber design makes and carries that the compressed air pressure loss is little, efficient is high;

4, according to drill power head output speed and rig air supply system parameter, adjust adjusting device in the collection chamber of combined type down-the-hole hammer to setting value, the reasonable distribution air-flow, effectively utilize energy, improve perforating efficiency.

5, use auger stem and combined type down-the-hole hammer supporting, under the condition of identical air demand, the deslagging better effects if, the dark hole of can sounding the night watches, efficiency of construction is higher, and is more economical;

6, according to construction method step of the present utility model, can be in hardpan rock stratum particularly, carry out the construction of major diameter (φ 500～φ 800mm and＞φ 1000mm) foundation pile expeditiously.

In sum, the utility model be a kind of cost lower, rational in infrastructure, safeguard easily, easy installation and removal, sealing reliably, effectively utilize energy, perforating efficiency is high combined type down-the-hole hammer.

Description of drawings

Fig. 1 is the front view of combined type down-the-hole hammer of the present utility model;

Fig. 2 is the sectional view of combined type down-the-hole hammer shown in Figure 1;

Fig. 3 is the vertical view of combined type down-the-hole hammer shown in Figure 1;

Fig. 4 is the upward view of combined type down-the-hole hammer shown in Figure 1;

Fig. 5 is the schematic diagram that combined type down-the-hole hammer shown in Figure 1 is connected with drilling rod;

Fig. 6 is the schematic diagram that combined type down-the-hole hammer shown in Figure 1 is connected with auger stem;

Fig. 7 is the outline drawing of the monolithic down-the-hole hammer of prior art;

Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13 are the schematic diagrames of combined type down-the-hole hammer construction method step of the present utility model;

Figure 14 is the structural representation of the cluster type down-the-hole hammer of prior art;

Figure 15 be among Figure 14 G to view.

The specific embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail.

With reference to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, divide device of air 2 one ends to be connected with stake body 3, the other end is connected with hookup 1, and the impactor 4 of plural minor diameter is installed on stake body 3.

Hookup 1 mainly is made of hexahedron column construction 11, flange 12, bearing pin 13, sealing mat 14; Hexahedron column construction 11 is pegged graft fixing by 2 bearing pins 13 and sealing mat 14 with interior six square joints 51 of drilling rod 5.

Divide device of air 2 mainly to constitute by collection chamber 21, deep camber gas circuit structure 22, bypass structure 23, first joint ring 24, second joint ring 25; Stake body 3 is made of rebound with holes 31, the base plate 34 that has locating hole and keyway 32 and dust ring 33, the upper plate 35 that has locating hole and housing 36; Impactor 4 mainly is made up of joint 41, the impactor body 42 that contains piston, positioning key 43 and the drill hammer 45 that has a hard alloy head 44.

Divide device of air 2 one ends to be connected with stake body 3, the other end is connected with hexahedron column construction 11, divide device of air 2 to be provided with collection chamber 21, collection chamber 21 is provided with the branch gas circuit that is communicated with impactor 4, the branch gas circuit that is connected with the impactor 4 of periphery setting is a deep camber gas circuit structure 22, with the center branch gas circuit that impactor 4 is connected being set is bypass structure 23, divides device of air 2 to be provided with the adjusting device 26 of adjustable gas pressure and gas flow.But the air feed parameter of adjusting device 26 centering ballistocardiographs control and regulation; Deep camber gas circuit structure 22 and bypass structure 23 reduce the pressure loss of air feed, divide device of air 2 to be connected and fixed with hexahedron column construction 11 by bolt 27, joint ring 25;

The joint 41 of impactor 4 is cylinders of band groove, and several impactors 4 are connected the location by locating ring 6 with stake body 3 after inserting the locating hole of the upper plate 35 of stake body 3 and base plate 34 respectively; Joint ring 24 positions of dividing device of air 2 are inserted in the end of cylinder joint 41, and are connected and fixed with dividing device of air 2 by bolt 37.

A kind of job practices of combined type down-the-hole hammer.

With reference to Fig. 5, Fig. 6, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12 and Figure 13.

The job practices of combinations thereof formula down-the-hole hammer has following steps:

1. the rig traveling that has unit head 7, air supply system 8, hollow cylindrical drilling rod 5 is pegged graft combined type down-the-hole hammer 111 and drilling rod 5 fixing to construction location by 2 bearing pins 13 and sealing mat 14; (seeing Fig. 5, Fig. 8)

2. start the unit head 7 of rig, drive drilling rod 5, combined type down-the-hole hammer 111, behind the alignment hole position, start each impactor 4 actions that air supply system 8 provides compressed air-driven combined type down-the-hole hammer 111 by turning clockwise; Unit head 7 descends, and rotates to underground high-frequency percussion drilling while drive combined type down-the-hole hammer 111, and disintegrating slag is expelled to ground with the exhaust airstream of impactor 4 by the annular gap between drilling rod 5 and the hole wall; (see figure 9)

3. punch to desired depth, and abundant deslagging; (see figure 10)

4. unit head 7 upwards promotes, and combined type down-the-hole hammer 111 also is promoted to ground thereupon; (seeing Figure 11)

5. rig is to moving on one side, and Xiang Kongzhong puts into reinforcing cage, concrete perfusion, after a period of time solidifies, promptly becomes the underground foundation stake; (seeing Figure 12, Figure 13)

6. the rig traveling repeats above step to next construction location.(seeing Figure 13)

Step 1. in except the drilling rod 5 that can use hollow cylindrical, can also use the auger stem 10 of hollow, peg graft by 2 bearing pins 13 and sealing mat 14 and combined type down-the-hole hammer 111 and punch after fixing, deslagging efficient is improved; (seeing Fig. 6, Fig. 8)

Step 2. by 2 bearing pins 13 and sealing mat 14 combined type down-the-hole hammer 111 and drilling rod 5 or auger stem 10 are pegged graft fixing before, according to drill power head 7 output speeds and rig air supply system 8 parameters, adjust adjusting device 26 in the branch device of air 2 of combined type down-the-hole hammer 111 to setting value, the reasonable distribution air-flow, effectively utilize energy, improve perforating efficiency.(seeing Fig. 2, Fig. 5, Fig. 6, Fig. 8)

In conjunction with the foregoing description, the utility model is illustrated, but by the structure of the quantity of the impactor of the minor diameter of combined type down-the-hole hammer and compound mode, stake body is done some changes, the details of construction sequence is done some suitable adjustment, just can in scope of the present utility model, derive the combined type down-the-hole hammer and the corresponding construction method thereof of various different types.

Claims

1. a combined type down-the-hole is hammered into shape, comprise hookup, stake body (3) and be installed in the impactor (4) of the plural minor diameter on the stake body (3), it is characterized in that: described hookup is the cylindricality fittings body, and the cylindricality joint of described cylindricality fittings body and drilling rod is pegged graft and fixed by at least one bearing pin and sealing mat.

2. combined type down-the-hole hammer according to claim 1, it is characterized in that: described cylindricality fittings body is hexahedron column construction (11), pegs graft fixing by 2 bearing pins (13) and sealing mat (14) with interior six square joints of drilling rod.

3. combined type down-the-hole hammer according to claim 1 and 2, it is characterized in that: divide device of air (2) one ends to be connected with described stake body (3), the other end is connected with described hookup, described minute device of air (2) be provided with collection chamber (21), described collection chamber (21) is provided with the branch gas circuit that is communicated with described impactor (4), the described minute gas circuit that is connected with the described impactor (4) of periphery setting is deep camber gas circuit structure (22), and the described minute gas circuit that is connected with the described impactor (4) of center setting is bypass structure (23).

4. combined type down-the-hole according to claim 3 hammer is characterized in that: described minute device of air (2) be provided with the adjusting device (26) of adjustable gas pressure and gas flow.

5. combined type down-the-hole hammer according to claim 1 and 2, it is characterized in that: the joint (41) of described impactor (4) is the cylinder of band groove, several described impactors (4) insert the upper plate (35) of described stake body (3) and the locating hole of base plate (34) respectively, are connected the location by locating ring (6) with described stake body (3); Joint ring (24) position of device of air (2) insert to be divided in described joint (41) end, by bolt (37) with described minute device of air (2) be connected and fixed.