WO2018206002A1

WO2018206002A1 - Pile driver chain-type drill

Info

Publication number: WO2018206002A1
Application number: PCT/CN2018/086531
Authority: WO
Inventors: 周兆弟
Original assignee: 周兆弟
Priority date: 2017-05-12
Filing date: 2018-05-11
Publication date: 2018-11-15

Abstract

Disclosed is a pile driver chain-type drill, comprising a chain rack (1a). The chain rack (1a) is provided with at least one chain-type carrier. The chain-type carrier is provided with several cutting teeth (3). An outer end of the cutting teeth (3) is extruded from the chain-type carrier and faces toward an outer side of the chain-type carrier. A chain transmission mechanism (204) is provided between the chain-type carrier and the chain rack (1a), so as to drive the chain-type carrier so that same performs a circumferential rotation or reciprocating swing on the chain rack (1a). The pile driver chain-type drill changes large-sized cutting teeth (3) into small-sized, thereby effectively reducing the stress. By using the pile driver chain-type drill, the effective area of a drill entering a soil body can be reduced, the replacement rate of an original soil body can be reduced, and the pollution caused by replacement mud can be effectively reduced. The cutting teeth (3) have a rational distribution, which helps the refining of rock and soil, thereby improving the structural strength of a cement mixing pile, avoiding floating pile, and greatly reducing the extrusion of surrounding rock and soil.

Description

Pile driver

The invention claims the priority of the Chinese invention patent application whose application date is "May 12, 2017", the application number is "2017205251560", and the name is "soil full-stirred chain drill bit", and the application date is "2017". The priority of the Chinese invention patent application on December 12, 2008, the application number is “2017113202359”, the name is “pile chain drill bit and pile driver”, and the application date is “01-22 January 2018”. The priority of the Chinese Patent Application No. 2018100611446, entitled "Pile Machine Chain Drill Bit", is incorporated herein by reference.

Technical field

The invention belongs to the technical field of pile machine equipment, and relates to cement mixing pile equipment, in particular to a pile machine and a chain bit and related components or components.

Background technique

Cement mixing pile foundation is an effective soft foundation treatment form. It usually uses cement as the main agent of curing agent. The cement is sprayed into the soil by a mixing pile machine and fully stirred to make a series of physical and chemical reactions between cement and soil. To harden the soft soil and improve the strength of the foundation.

In the prior art, a rotary pile driver is usually used to form a hole, and a curing agent is sprayed through a spray pipe on the drill bit, and the hole is turned into a hole and the body is broken, and the solidified agent is stirred to form a cement soil solid. The pile drill bit uses a spiral blade to cut the crushed soil. The size of the blade or the cutter head is relatively large, and the size of the cut rock is large, and even a block phenomenon occurs, which causes the following problems: During the production process of the mixing pile, the cement slurry can not enter the “block rock soil”, resulting in the existence of massive rock in the concrete mixing pile, which results in the pressure resistance and bearing capacity of the concrete mixing pile is significantly reduced; 2 when drilling the silt layer When the concrete mixing pile is made, the squeezing effect may occur, so that the bottom of the concrete mixing pile is hollow, and the phenomenon of "floating pile" appears, which leads to the instability of the cement soil mixing pile foundation. This will undoubtedly affect the quality of the pile.

The prior art also discloses a chain knife type mixing pile wall forming device, which has two chain knife cutting box assemblies, and the chain knife cutting box assembly is provided with a driving sprocket, a lazy wheel and a chain rail, wherein the chain rail A plurality of sets of spaced transverse cutters are fixedly mounted on the cutter frame, and the rotation of the drive sprocket and the idler wheel drives the chain rail and the cutter on the cutter to rotate, thereby achieving cutting and stirring of the soil. The chain knife type mixing pile wall forming equipment is mostly used in the excavation trough foundation, and the chain knife cutting box assembly has a large volume, large driving power, high energy consumption, and the power is set at the top of the pile rack, which is This results in a long drive chain that not only makes the power less efficient, but also prone to failure. In addition, the transverse cutters arranged on the chain rails with larger widths still have technical problems of poor soil pulverization.

In view of this, it is necessary to propose a new pile driver scheme and optimize its component parts or component structure accordingly.

Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a pile driver chain drill having a good rock smashing effect in view of the above problems.

In order to achieve the above object, the present invention adopts the following technical solutions: a pile driver chain drill bit, including a chain frame, the chain frame is provided with at least one chain carrier, and the chain carrier is provided with a plurality of a cutting tooth, the outer end of the cutting tooth protrudes from the chain carrier and faces the outer side of the chain carrier, and the chain carrier and the chain frame are provided with a chain transmission mechanism to drive the chain carrier in the chain frame Swinging or reciprocating in the last week.

In the present invention, the "external end of the cutting tooth" is relative to the "one end of the cutting tooth fixed to the chain carrier". For a ring-shaped chain carrier, "the outer side of the chain carrier" refers to a region other than the ring formed by the chain carrier; "the plane in which the chain carrier is located" refers to the plane in which the ring formed by the chain carrier is located; The chain carrier, "the outer side of the chain carrier" refers to the outer portion of the region in which the chain carrier itself is located; the "plane in which the chain carrier is located" refers to the plane formed by the direction in which the chain links are arranged.

The number of chain carriers may be only one. In order to stabilize the chain carrier, the effect of the anti-torque during excavation is effectively reduced or eliminated, and the chain carrier is driven by a chain transmission mechanism located in the chain frame to drive the chain carrier. The chain frame reciprocates. The chain frame is located at the lower part of the drill pipe, and the power frame is arranged in the chain frame, and the power output end of the power device is connected with the power input end of the chain transmission mechanism.

The invention discloses two technical solutions capable of realizing the reciprocating swing of the chain carrier. In the first solution, the power device has a power output end that can rotate circumferentially, and the chain transmission mechanism includes a transmission rod and a lower sprocket, and the middle portion of the transmission rod is fixed. Connected to the power output end of the power unit and driven to rotate by the power output end, the lower sprocket is disposed at a lower portion of the chain frame, the chain carrier is disposed around the lower sprocket, and the two ends of the chain carrier are respectively connected by a crank slider mechanism Both ends of the transmission rod; the power unit drives the transmission rod to rotate and drives the chain carrier to reciprocate on the chain frame through the crank slider mechanism. In the second scheme, the power unit has a power output end that can expand and contract in a vertical direction, and the power unit has two. The chain transmission mechanism includes a lower sprocket, the lower sprocket is disposed at a lower portion of the chain frame, and the chain carrier is disposed under the chain. The sprocket and the two ends of the chain carrier are respectively connected to the power output end of the power device; the power output ends of the two power devices are alternately telescoped to drive the chain carrier to reciprocate.

In the first solution, the power unit may be an electric motor or a hydraulic motor. In the second solution, the power unit may be a cylinder or a cylinder, and the power unit may be mounted on the same side of the chain frame, and the power output of the two power units. They are respectively arranged vertically upwards and vertically downwards. At this time, an upper sprocket is required, and the chain carrier is wound around the upper sprocket and the lower sprocket, and the power output of the two power devices is respectively connected at two ends of the chain carrier. At the end, a partial ring shape is formed, and the power output ends of the two power devices are alternately extended and contracted to drive the chain carrier to reciprocate. Or the power devices are respectively installed on both sides of the chain frame, the power output ends of the two power devices are all disposed downward, the chain carrier is wound around the lower sprocket, and the two ends of the chain carrier respectively connect the power of the two power devices The output end forms a partial ring shape, and the power output ends of the two power devices alternately expand and contract to drive the chain carrier to reciprocate.

Preferably, the cutting teeth are spaced apart along the chain carrier to form a cutting tooth array on the chain frame. That is, the cutting teeth are spaced apart in at least two directions on the chain frame.

The drill bit of this structure converts the cutting teeth from a large size to a small size, effectively reducing the force. The use of chain drills can reduce the effective area of the drill bit into the soil, reduce the replacement rate of the original soil, and effectively reduce the pollution caused by the replacement mud. Since the cutting teeth are spaced apart along the chain carrier, all of the cutting teeth on the chain frame form a cutting tooth array, which may be ordered or unordered. Obviously, an array of cutting teeth can be formed when the cutting teeth are arranged in an orderly manner. In addition, the distribution of the cutting teeth is reasonable, which is conducive to the refinement of the rock and soil, thereby improving the structural strength of the cement mixing pile, avoiding floating piles, and significantly reducing the extrusion of the surrounding rock.

Therefore, in the above-mentioned pile driver chain drill, the number of the chain carriers is not less than two, wherein at least two chain carriers are operated in opposite directions, and the torque generated by the rotation or reciprocating oscillation of each chain carrier Offset or at least partially offset. This configuration achieves torque offset or at least partial offset, effectively reducing or eliminating the effects of counter torque during excavation.

In order to ensure the excavation efficiency or reduce the lateral dimension of the drill bit, the distance between the adjacent two chain carriers can be reduced as much as possible, as long as the cutting teeth on the adjacent two chain carriers are not touched.

The arrangement of the chain carriers on the chain frame is various, and the layout of the chain carriers determines the distribution of the cutting teeth. The first arrangement: in the above-mentioned pile driver chain drill, at least two chain carriers are in parallel with each other, and at least two chain carriers are in a plane parallel to the plane of the chain carrier The projections are overlapping or parallel, at which point the cutting teeth of the partial segments form a planar cutting tooth array. Alternatively, in the above-mentioned pile driver chain drill, at least two chain carriers are parallel to each other, and at least two chain carrier segments are projected at an angle in a plane parallel to the plane of the chain carrier. distributed. The above-mentioned pile driver chain drill may further comprise a plurality of chain carriers, a plurality of chains, when the partial segments of the at least two chain carriers are distributed at an angle in a plane parallel to the plane of the chain carrier. The partial segments of the partial chain carrier of the carrier are in a fan-shaped divergent distribution in a plane parallel to the plane of the chain carrier. The cutting tooth density in the cutting tooth array of this structure is densely closed, which is convenient for digging and discharging.

The second arrangement form: in the above-mentioned pile driver chain drill bit, at least two chain carriers are in a plane intersecting each other, and at least one chain carrier has a partial chain segment overlapping or parallel with the intersection of the planes of the two chain carriers . Alternatively, in the above-mentioned pile driver chain drill, at least two chain carriers are arranged to intersect each other, and at least a part of the chain segments of each chain carrier are distributed at an angle to the intersection of the planes of the two chain carriers. When the at least part of the chain segment is distributed at an angle with the intersection line of the planes of the two chain carriers, the above-mentioned pile driver chain drill bit may further comprise a plurality of chain carriers, and the planes of the respective chain carriers have a common intersection line. And at least a portion of the segments of the chain carrier are distributed at an angle to the common intersection. Further, at least a part of the segments of the plurality of chain carriers are fan-shaped and distributed in a plane passing through the plane of the common intersection; or at least part of the segments of the plurality of chain carriers are tapered with respect to the common intersection Shape distribution. The cutting tooth density in the cutting tooth array of this structure is densely closed, which is convenient for digging and discharging. Preferably, the common line of intersection is arranged vertically.

When the at least part of the chain segment is distributed at an angle with the intersection line of the planes of the two chain carriers, the above-mentioned pile driver chain drill bit may further comprise a plurality of chain carriers, and the intersection line of the plane of each two chain carriers is parallel At a reference line, at least a portion of the segments of each of the chain carriers are angularly distributed with the reference line. Further, at least a part of the segments of the plurality of chain carriers are fan-shaped and distributed in a plane passing through a plane of the reference line; or at least a part of the segments of the plurality of chain carriers are tapered with respect to the reference line . The cutting tooth density in the cutting tooth array of this structure is densely closed, which is convenient for digging and discharging. Preferably, the reference line is vertically arranged. In addition, the chain carrier with the planes intersecting each other can also form a plane cutting tooth array of different shapes such as a fan shape, a triangle shape and a trapezoidal shape on the chain frame; and a three-dimensional cutting tooth array such as a conical shape or a polyhedral shape can be formed on the chain frame. .

In a third arrangement, in the above-mentioned pile driver chain drill, at least two chain carriers are coincident in plane, and at least two chain carriers are in a straight line or parallel in the plane of the chain carrier. Or, in the above-mentioned pile driver chain drill, at least two chain carriers are coincident in plane, and at least two chain carriers are arranged at an angle in the plane of the chain carrier.

When the partial segments of the at least two chain carriers are disposed at an angle in the plane of the chain carrier, the above-mentioned pile driver chain drill may further comprise a plurality of chain carriers, and the partial chain segments of the plurality of chain carriers are in the chain The projections in a plane parallel to the plane of the carrier are fan-shaped divergent distributions. The cutting tooth density in the cutting tooth array is densely closed, which is convenient for digging and discharging. It should be noted that the above three arrangements can be combined with each other as needed to obtain different excavation effects.

In the above-mentioned pile driver chain drill, the chain frame is an integrally arranged, multi-stage bent rod-shaped box mechanism, the chain frame includes at least two rod-shaped boxes; the power device The utility model comprises a plurality of driving mechanisms, which are arranged in sequence from top to bottom on the chain frame and are respectively in different rod-shaped boxes. The invention provides the chain frame as an integrally arranged, multi-segmented rod-shaped box mechanism, so that the respective driving mechanisms can be arranged in a relatively closed environment, so that the driving mechanism has a good working environment and the driving is improved. The service life of the organization.

In the above-mentioned pile driver chain drill, the chain carrier is annular, and the chain transmission mechanism includes an upper sprocket and a lower sprocket disposed on the chain frame, and the chain carrier is wound around The upper and lower sprocket wheels are arranged in a one-to-one correspondence with the upper sprocket; the lower sprocket heights are arranged on the chain frame. This structure realizes the engagement of the sprocket with the chain, which facilitates excavation, and the power unit is preferably connected to the upper sprocket, and the lower sprocket is used as the driven wheel.

In the above-mentioned pile driver chain drill, the power unit includes a plurality of drivers, and the driver is connected to the upper sprocket in a one-to-one correspondence, and the drivers are sequentially disposed from the top to the bottom on the chain frame. This structure allows the individual actuators to be arranged in the longitudinal direction, which helps to reduce the lateral dimension of the entire drill bit, reduces the effective area of the drill bit into the soil, reduces the replacement rate of the original soil, and effectively reduces the pollution caused by the replacement mud.

In the above-mentioned pile driver chain drill, the cutting teeth are made of a sheet material, and the extending direction of the cutting teeth is parallel or at an acute angle with the running direction of the cutting teeth, and the equivalent of the cutting teeth The cutting width is greater than the thickness of the cutting teeth.

In order to improve the excavation efficiency of the cutting teeth, in the above-mentioned pile-type chain drill, the outer end of the cutting tooth is flat and long, and the outer working end of the cutting tooth has an equivalent working width along the longitudinal direction of the chain carrier. The thickness of the cutting teeth does not exceed the length of the outer end of the cutting teeth.

The invention directly arranges one cutting tooth on the chain carrier, and the position of the small-sized and independent cutting teeth becomes random, and can be arranged more reasonably on the chain carrier. At the same time, since the equivalent working width of the outer end of the cutting tooth along the length direction of the chain carrier is larger than the thickness of the cutting tooth, the excavation size of the single cutting tooth can be effectively increased, thereby improving the excavation efficiency; the size is smaller, and the cutting tooth is outside. The end is flat and long, the cutting teeth are arranged more rationally, and the excavation efficiency is high, which can greatly improve the crushing efficiency of the cutting teeth on the rock and soil. The equivalent working width is the sum of the actual excavation widths of the excavated parts of the cutting teeth during cutting. If the excavated portion formed by the cutting teeth is continuous, the equivalent working width is the width of the excavated portion; if the excavated portion formed by the cutting teeth is discontinuous, the equivalent working width is the excavated portion. The sum of the widths of the parts.

Obviously, the equivalent working width of the outer end of the cutting tooth along the length of the chain carrier does not exceed the length of the outer end of the cutting tooth. When the equivalent working width is equal to the dimension of the outer end of the cutting tooth, the cutting teeth are laterally disposed, and the mechanical strength of the cutting teeth is required to be high.

The invention provides two methods for realizing the equivalent working width of the outer end of the cutting tooth along the length direction of the chain carrier is greater than the thickness of the cutting tooth:

First, the outer end of the cutting tooth is made of a sheet material, the outer end of the cutting tooth is longitudinally arranged parallel to the longitudinal direction of the chain carrier, and the outer end of the cutting tooth is laterally oriented to the chain carrier. Bending and / or twisting. On the one hand, the outer end of the cutting tooth made of sheet material can be cut into the soil layer more quickly and smoothly, and the crushing effect on the rock and soil is good; on the other hand, the bending and/or twisting realizes the outer end of the cutting tooth, etc. The effective working width is larger than the cutting tooth thickness, which improves the excavation efficiency and effectively reduces the energy consumption; finally, the bending and/or twisting can also form the drainage surface on the cutting teeth, which is not only beneficial for discharging soil, but also facilitating soil refinement; It is also conducive to the subsequent mixing of the excavated soil.

The bending and twisting are only the difference between the connecting portion between the bending portion and the torsion portion and the outer end of the cutting tooth, and the connecting portion between the bending portion and the outer end of the cutting tooth has a distinct angle, and the torsion portion and the cutting tooth The connection between the outer ends is relatively smooth, with a rounded surface transition, reducing stress concentration and structural strength.

Secondly, the outer end of the cutting tooth is made of a sheet material, and the outer length of the cutting tooth is arranged at an acute angle with the longitudinal direction of the chain carrier. In this way, the equivalent working width of the outer end of the cutting tooth can be made larger than the thickness of the cutting tooth, and the discharging surface can also be formed.

In the above-described pile driver bit chain cutter, the outer end of the cutting tooth is laterally bent and/or twisted toward the longitudinal direction of the chain carrier. When the outer end of the cutting tooth is inclined with respect to the longitudinal direction of the chain carrier, it is also possible to continue to provide bending and/or twisting at the outer end of the cutting tooth. The effect of bending and/or twisting is the same as described above. Preferably, the angle of the bending and/or torsional extension of the outer end of the cutting tooth is at an acute angle (preferably 30 to 60) with respect to the running direction of the cutting tooth.

In the above-mentioned pile driver chain drill, the outer end of the cutting tooth has at least one slit so that the outer end of the cutting tooth is divided into at least two cutting portions, and at least two cutting portions are not in the same plane. The excavated rock and soil can be scattered from the incision, which not only expands the cutting size of the cutting teeth, but also facilitates further refinement of the rock and soil, and the drainage efficiency is further improved. The number of slits is designed as needed.

In the above-described pile driver chain drill, the chain carrier is provided with at least one row of cutting teeth distributed along the longitudinal direction of the chain carrier, and a drain gap is left between the cutting teeth of the adjacent columns. The number of rows of cutting teeth is determined according to needs, and the cutting teeth of adjacent columns should not be too close to avoid affecting the soil discharge. However, it should not be too sparse, so as not to affect the efficiency of excavation or affect the lateral size. In the above-described pile driver chain drill, each of the cutting teeth of the adjacent rows of cutting teeth is disposed oppositely or offset. The setting of the adjacent cutting teeth of each column is adjusted as needed, and can be set adjacently continuously, or can be set at a gap.

In the above-described pile driver chain drill, the outer ends of the respective cutting teeth in adjacent rows of cutting teeth are bent and/or twisted in the same direction and/or in the opposite direction.

In the above-mentioned pile driver chain drill, the cutting teeth are separate cutting teeth fixedly mounted on the chain carrier; or the cutting teeth are integrally cut teeth integrally formed with the components constituting the chain carrier. . Split cutting teeth and integral cutting teeth are all feasible technical solutions. The split cutting teeth are beneficial to make cutting teeth with higher hardness materials. The integrated cutting teeth are obviously easy to manufacture.

In the above-described pile driver chain drill, the chain frame is disposed at a lower end of a drill pipe to which a pressing power device is connected. When excavating, the pressing power device can significantly improve the excavation ability of the cutting teeth, and perform excavation similar to milling, boring and cutting.

In the above-mentioned pile driver chain drill, the chain carrier is annular and the number of the chain carriers is four, four planes of the chain carrier are arranged in parallel with each other, and four chain chains on the chain carrier are arranged. The projection of the segments in a plane parallel to the plane of the chain carrier overlaps; the partial segments of the projection overlapping in a plane parallel to the plane of the chain carrier are arranged vertically so that the moral cutting teeth form a vertical Plane cutting tooth array.

Compared with the prior art, the advantages of the pile driver bit driller are:

The cutting teeth are converted from large size to small size, which effectively reduces the stress and reduces the energy consumption. The chain stirring can reduce the effective area of the drill bit entering the soil, which can reduce the replacement rate of the original soil and effectively reduce the replacement mud. The pollution that comes. Moreover, the position of the small-sized and independent cutting teeth becomes random, which can be more rationally arranged on the pile driver chain cutter, and more chain chains of the pile driver can be installed on the same chain carrier. The drill bit cuts the teeth, so that not only the excavation efficiency of the chain drill cutting teeth is improved, but also the rock and soil crushing efficiency is further improved, thereby improving the structural strength of the cement mixing pile, avoiding floating piles, and significantly reducing the surrounding rock and soil. Pressure.

DRAWINGS

Figure 1 is a schematic view showing the structure of a pile driver of the pile driver of the present invention;

Figure 2 is a schematic view of the pile driver chain bit of the present invention from another perspective;

Figure 3 is a schematic structural view of the other direction of Figure 2;

Figure 4 is an enlarged view of a portion A of Figure 1;

Figure 5 is an enlarged view of a portion B of Figure 2;

Figure 6 is a schematic view showing the first arrangement of the chain carrier of the pile driver of the pile driver of the present invention;

Figure 7 is a schematic view showing a second arrangement of the chain carrier of the pile driver of the pile driver of the present invention;

Figure 8 is a schematic view showing a third arrangement of the chain carrier of the pile driver of the pile driver of the present invention;

Figure 9 is a schematic view showing a fourth arrangement of the chain carrier of the pile driver of the pile driver of the present invention;

Figure 10 is a schematic view showing the arrangement of the fifth chain carrier in the chain drill of the pile driver of the present invention;

Figure 11 is a schematic view showing the arrangement of the sixth chain carrier in the pile driver of the pile driver of the present invention;

Figure 12 is a schematic view showing the arrangement of the seventh chain carrier in the chain drill of the pile driver of the present invention;

Figure 13 is a schematic view showing the arrangement of the eighth chain carrier in the pile driver of the pile driver of the present invention;

Figure 14 is a schematic view showing the arrangement of the ninth chain carrier in the pile driver of the pile driver of the present invention;

Figure 15 is a schematic view showing the arrangement of the tenth chain carrier in the pile driver of the pile driver of the present invention;

Figure 16 is a schematic view showing the eleventh type of chain carrier arrangement in the pile driver of the pile driver of the present invention;

Figure 17 is a schematic view showing the structure of a soil agitating type chain drill of the first embodiment;

Figure 18 is a schematic view showing the structure of the soil full-stirred chain drill of Figure 17 from another perspective;

Figure 19 is a schematic view showing the structure of the auxiliary cutting assembly of Figure 17 from another perspective;

Figure 20 is a schematic view showing the structure of a soil-saturated type chain drill of the second embodiment;

Figure 21 is a schematic view showing the structure of the soil full-stirred chain bit of Figure 20 from another perspective;

Figure 22 is a schematic view showing the structure of a soil agitating type chain drill of Example 3;

Figure 23 is a schematic view showing the structure of the soil full-stirred chain bit of Figure 22 under another viewing angle;

Figure 24 is a schematic view showing the structure of a soil agitating type chain drill of the fourth embodiment;

Figure 25 is a schematic view showing the structure of the soil full-stirred chain bit of Figure 24 from another perspective;

Figure 26 is a schematic view showing the structure of a soil agitating type chain drill of Example 5;

Figure 27 is a schematic view showing the structure of a soil agitating type chain drill of Example 6;

Figure 28 is a schematic view showing the structure of a soil agitating type chain drill of the seventh embodiment;

Figure 29 is a schematic view showing the structure of a second soil fully agitated chain drill in Embodiment 7;

Figure 30 is a schematic view showing the structure of the soil full-stirred chain bit of Figure 29 from another perspective;

Figure 31 is a schematic structural view of an endless chain applied to Embodiment 8;

Figure 32 is a schematic view showing the structure of another form of the endless chain applied in Embodiment 8;

Figure 33 is a schematic view showing a first distribution mode applied to the cutting carrier in the embodiment 9;

Figure 34 is a vertical projection view of Figure 33;

Figure 35 is a schematic view showing a second distribution mode of the cutting carrier applied to the embodiment;

Figure 36 is a vertical projection view of Figure 35;

Figure 37 is a schematic view showing a second distribution mode applied to the cutting carrier in the embodiment 9;

Figure 38 is a vertical projection view of Figure 37;

Figure 39 is a schematic view showing a third distribution mode applied to the cutting carrier in the embodiment 9;

Figure 40 is a vertical projection view of Figure 39;

Figure 41 is a schematic view showing a fourth distribution mode applied to the cutting carrier in the embodiment 9;

Figure 42 is a vertical projection view of Figure 41;

Figure 43 is a schematic view showing a fifth distribution mode applied to the cutting carrier in the embodiment 9;

Figure 44 is a vertical projection view of Figure 43;

Figure 45 is a vertical projection view of Figure 31;

Figure 46 is another projection view of the vertical direction of Figure 31;

Figure 47 is a schematic view showing the structure of an endless chain applied to a soil-mixed chain drill;

Figure 48 is an enlarged view of a portion C of Figure 47;

Figure 49 is another schematic structural view of the endless chain applied to the soil-saturated chain type drill of Figures 17 to 32;

Figure 50 is a schematic view showing the structure of a first type of cutting tooth applied to the pile-type drill bit of Figures 1 to 3;

Figure 51 is a schematic view showing the structure of a second cutting tooth applied to the pile driver of the pile driver of Figures 1 to 3;

Figure 52 is a schematic view showing the structure of a third type of cutting tooth applied to the chain drill of the pile driver of Figures 1 to 3;

Figure 53 is a schematic view showing the structure of a fourth type of cutting tooth applied to the chain drill of the pile driver of Figures 1 to 3;

Figure 54 is a schematic view showing the structure of a fifth cutting tooth applied to the pile driver of the pile driver of Figures 1 to 3;

Figure 55 is a schematic structural view of Figure 51 in another perspective;

Figure 56 is a schematic structural view of a power unit sealing structure applied to the present invention;

Figure 57 is a schematic structural view of the seal ring of Figure 56;

Figure 58 is an enlarged view of the seal ring of Figure 57;

Figure 59 is an enlarged view of a portion D in Figure 56;

Figure 60 is an enlarged view of a portion E in Figure 56;

Figure 61 is a schematic view showing an embodiment of Embodiment 15;

Fig. 62 is a schematic view showing another embodiment of the fifteenth embodiment.

detailed description

The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

As shown in FIG. 1 to FIG. 3 and FIG. 17 to FIG. 23, the pile driver chain drill of the present embodiment is a soil full-stirred chain drill including a chain frame 1a, a chain frame 1a and a drill pipe. 100 connected, located in the lower part of the drill pipe 100, wherein the drill pipe 100 can be a single-section or multi-section telescopic structure; the chain frame 1a is provided with at least one chain carrier, and the chain carrier is provided with a plurality of cutting bodies for cutting the soil The protruding structure is specifically a cutting tooth 3, the outer end of the cutting tooth 3 protrudes from the chain carrier; the chain frame 1a is provided with a power device 205, wherein the power device 205 is connected with the chain transmission mechanism 204, and the chain transmission mechanism 204 is used to drive the chain carrier to rotate circumferentially or reciprocally on the chain frame 1a.

The drill bit of the embodiment is located at the lower part of the drill pipe 100, and is driven by the lower power (the power device is directly disposed on the drill bit), and the power lowering completely solves the safety hazard caused by the power setting at the top end of the pile frame, especially the drill bit. The requirements of the torsion force on the strength of the frame and the bending strength of the drill pipe; the diameter of the drill pipe is reduced, so that the small-aperture pile can be drilled; the power-discharged drill bit can transmit the torque more effectively and reduce the power loss; The power requirement of the device 205 is reduced, even if only one-fifth of the existing power can be easily driven; the power-down and chain-cutting can effectively chop the soil, so that the cement and the soil can be more fully mixed. Integral, improve the performance of the mixing pile; use the power down to use the telescopic drill pipe, so that the drill pipe can be used without greatly increasing the drilling efficiency.

In this embodiment, the chain carrier may be a chain, or may be replaced by other chain carriers of a track, a chain, etc.; in addition to the ring shape, the chain carrier may also be a strip shape. Wherein, when the chain carrier is a ring or a strip chain, the structure and function thereof are: when the chain 1 is the ring, it is supported on the corresponding driving sprocket 1b and the driven gear 1c, and can be rotated, during the turning operation In the middle, the cutting teeth 3 are actuated to realize excavation; when the chain is a strip, the two ends are respectively fixed and wound around the corresponding driving sprocket 1b or the driven sprocket 1c, or connected to the cam structure, thereby being reciprocable The action, which drives the cutting teeth 3 during the reciprocating action, realizes excavation.

The cutting tooth 3 in this embodiment may be a saw blade-shaped multi-tooth structure, or may be a blade-shaped toothless or less tooth structure (for convenience of description, in the present application, the latter may sometimes use a "tool". Both of the cutting teeth 3 of the two structures can be bent or twisted to one side in the running direction of the chain carrier, thereby increasing the equivalent cutting width of the cutting teeth 3.

Without loss of generality, in the following description, the present embodiment uses the endless chain 1 as an example to introduce the pile-chain drill bit.

The chain transmission mechanism 204 of the present embodiment includes a drive sprocket 1b and a driven sprocket 1c which are disposed on the chain frame 1a, and the endless chain 1 is wound around the drive sprocket 1b and the driven sprocket 1c. Here, the mounting position of the driving sprocket 1b and the driven sprocket 1c on the chain frame 1a is not limited. For example, the driving sprocket 1b may be above the driven sprocket 1c or may be below the driven sprocket 1c. Further, it is also possible to provide two driving sprockets 1b at the same time, and when the two driving sprockets 1b are provided, a differential is required, and the differential is disposed between the two driving sprockets 1b.

In the present embodiment, the chain frame 1a functions as a bearing member of the endless chain 1, and thus the form thereof may be various, and specifically may be a connecting seat, a flange, a connecting frame, or the like. For example, the chain frame 1a may be an integrally arranged, multi-segmented rod-shaped box mechanism as shown in FIGS. 1 to 3 (for the sake of simplicity, when the chain frame 1a is involved in the following description, Using the abbreviation of "bit holder", the advantage of the bit holder is that it facilitates the layout of the plurality of endless chains 1 and avoids interference; it is of course also possible to have other structural forms, which are suitable for arranging the endless chain 1.

When the structure of the chain frame 1a shown in Figs. 1 to 3 is employed, a plurality of endless chains 1 (preferably a plurality) are mounted on the chain frame 1a, and the power unit 205 can be directly disposed in the casing of the chain frame 1a. That is to say, the driving scheme under power is adopted, and it is necessary to optimize the sealing at this time, and the details can be further described below for the description of the sealing structure of the power unit.

As shown in FIGS. 1 to 3, the power unit 205 includes a plurality of driving mechanisms 11 (which may be hydraulic motors or motors, etc.), and the driving mechanism 11 is connected to the driving sprocket 1b of each endless chain 1 in a one-to-one correspondence, each driving mechanism. 11 is mounted with a driving sprocket 1b for driving an endless chain 1; and the driving mechanism 11 is sequentially disposed from the top to the bottom on the chain frame 1a, so that the space layout requirement on the chain frame 1a is satisfied. A plurality of driving mechanisms 11 are disposed in the power unit 205 to facilitate independent control of the running direction and speed of each of the endless chains 1.

Here, it should be understood by those skilled in the art that a certain gap should be left between different drive mechanisms 11. Specifically, the respective drive mechanisms 11 are sequentially disposed from the top to the bottom on the chain frame 1a, which allows the respective drive mechanisms 11 to be laid out in the longitudinal direction, which is advantageous in reducing the lateral size of the entire drill bit.

When the structure of the chain frame 1a shown in FIGS. 1 to 3 is adopted, the chain frame 1a includes at least two rod-shaped housings (the chain frame 1a shown in FIG. 2 includes four segments), and each of the rod-shaped housings 1aa The two-section rod-shaped housings 1aa disposed adjacent to each other may be connected by the bent portion 1ab; the bending directions of the adjacent bent portions 1ab may be the same, or may be partially the same or partially opposite (for example, In Figure 1, the first, second, and third segments are respectively bent toward the first side, and the fourth segment is bent in the opposite direction to the other side. The driving mechanisms 11 are respectively disposed in the rod-shaped housings 1aa of different segments; The bent portions 1ab may each be disposed at an obtuse angle with the adjacent rod-shaped housings 1aa, and each of the bent portions 1ab has an inner inclined surface 1ac facing the drill pipe direction and an outer inclined surface 1ad facing the chain frame extending direction, each of the circular chains The top end of 1 is adjacent to the outer bevel 1ad of the corresponding bent portion 1ab, respectively.

In FIG. 2, the chain frame 1a is a four-stage bending, wherein the first three sections are bent in the same direction, and the fourth section is reversely bent in the other direction, so that they can be respectively arranged on the rod-shaped boxes of one to four sections. The drive mechanism 11 is provided as the drive sprocket 1b, and the common driven sprocket 1c is provided on the fourth stage, so that the arrangement of the endless chain 1 does not cause interference. Of course, the number of segments of the multi-segment bent chain frame 1a can be adjusted with the number of chains so as not to cause interference of the endless chain 1 .

In FIGS. 1 to 3, there are a plurality of drive mechanisms 11, and a plurality of drive sprocket 1b or driven sprocket 1c are provided, which are respectively disposed corresponding to the corresponding endless chain 1. It can be understood that the driving mechanism 11, the driving sprocket 1b or the driven sprocket 1c of each endless chain 1 can also be shared. In this case, the common driving sprocket 1b or the driven sprocket 1c need to be coaxially arranged. The method can save equipment cost, but can only realize the same direction, same speed and synchronous driving of each chain; in order to achieve torque offset or partial offset, the shared drive mechanism 11, the drive sprocket 1b or the driven sprocket 1c should There are at least two sets.

In addition, the chain frame 1a may also be a connection frame as shown in FIG. 17 to FIG. 27, one chain frame 1a is used for mounting an endless chain 1, and the chain frames 1a corresponding to different endless chain 1 can be connected to each other. When the chain frame 1a of this type is adopted, the driving mechanism 11 may be disposed above each of the endless chains 1 and connected to the endless chain 1 through the transmission assembly; the driving mechanism 11 may also be disposed adjacent to the endless chain 1 In the gap between.

Of course, the chain frame 1a and the endless chain 1 can also be replaced by other conventional methods except the present embodiment. Further, the connection of the endless chain 1 to the drive mechanism 11, the manner in which the chain frame 1a is connected to the drill pipe, and the manner in which the drive mechanism 11 is disposed may also adopt other conventional modes in which the present embodiment is exemplified.

Similarly, those skilled in the art will readily understand that when the chain frame 1a adopts the connection frame structure of FIGS. 17-27, the drive mechanism 11, the drive sprocket 1b or the driven sprocket 1c of each endless chain 1 can also be shared or Set separately, no longer repeat them.

In the present embodiment, the endless chain 1 should have at least one piece on which the cutting teeth 3 arranged in an array are arranged, thereby constituting a plurality of cutting body units. Thus, when the endless chain 1 is rotated, the cutting body unit realizes cutting, pulverizing and stirring the soil.

During the circumferential rotation or reciprocating oscillation of the chain carrier on the bit holder (ie during the excavation process), the object to be excavated will generate a counter torque acting on the chain carrier, and the reaction force is transmitted to the chain carrier through the chain carrier. On the bit holder. If no measures are taken to balance, this reaction will cause the bit holder to move in the direction of the reverse chain carrier. Therefore, in the present embodiment, the endless chain 1 preferably has at least two, and at least two of the endless chains 1 are oppositely rotated in the circumferential direction of the chain frame 1a, and the torque generated by the circumferential rotation of each of the endless chains 1 cancels each other. Or at least partially offset. The distance between the adjacent two endless chains 1 can be reduced as much as possible to ensure the excavation efficiency, as long as it is noted that the cutting teeth 3 on the adjacent two endless chains 1 are not touched.

When the aforementioned drill bit holder is used as the chain frame 1a, since the driving mechanism 11 is at different height positions of the chain frame 1a, those skilled in the art should understand that the height here refers to the driving mechanism of the drill bit in the use state. The relative position of the center of 11 is therefore different on the same side of the chain frame 1a, and the lengths of the segments of the different endless chains 1 are different. In order to ensure the torque offset balance, the respective drive mechanism 11 and the drive sprocket 1b need to be The mounting direction and the mounting position on the chain frame 1a are carefully designed according to the length of the endless chain 1. As shown in FIGS. 1 to 3, four endless chains 1 are disposed on the pile bit, and in this embodiment, the longest endless chain 1 and the shortest endless chain 1 are mounted on the same side of the chain frame 1a and in the chain frame. 1a is rotated in the same direction in the upper circumferential direction, and the other two medium-long circular chains 1 are mounted on the other side of the chain frame 1a and are circumferentially rotated in the same direction on the chain frame 1a, but in the chain frame 1a. The direction in which the endless chain 1 on both sides rotates circumferentially on the chain frame 1a is reversed, so that the torque balance of the chain frame 1a is ensured.

The arrangement of the endless chain 1 on the chain frame 1a is various. The layout of the endless chain 1 determines the distribution of the cutting teeth 3, which in turn determines the way the drill bit is excavated to the soil. The arrangement of the endless chain 1 in the pile driver chain drill of the present embodiment will be described in detail.

As shown in FIG. 1, FIG. 18, FIG. 21 and FIG. 23, in the embodiment, the planes of the endless chains 1 are parallel to each other, and part of the segments of each of the endless chains 1 are in a plane parallel to the plane of the endless chain 1. The projection overlaps, and the portion of the segment is vertically disposed, at which time the cutting teeth 3 on the portion of the segment form a planar tool array. Figure 6 also shows an embodiment of the tilting arrangement of the portion of the segment. As shown in FIGS. 7 to 8, it is also possible to arrange the partial segments of the endless chain 1 which are disposed parallel to each other in a plane parallel or at an angle to a plane parallel to the plane in which the endless chain 1 is located.

Further, as shown in FIGS. 10 and 17, it is also possible to arrange the planes in which the plurality of endless chains 1 are located so as to overlap each other. At least two of the segments of the endless chain 1 are in the same straight line or parallel in the plane of the endless chain 1. It can also be provided that at least part of the segments of the two endless chain 1 are arranged at an angle in the plane of the endless chain 1. Preferably, the angle setting may be to distribute the partial segments of each of the endless chain 1 in a fan-like manner in the plane of the chain carrier.

Further, as shown in FIGS. 9 and 12-16, it is also possible to arrange each of the endless chain 1 so that the plane in which at least two of the endless chains 1 are located intersects each other. Wherein at least one partial segment of the endless chain 1 overlaps or is parallel with the line of intersection of the planes of the two endless chains 1; or, at least part of the segments of each of the endless chain 1 intersects with the plane of the plane of the two endless chains 1 Angle distribution. It can also be arranged that the planes of the respective endless chains 1 have a common line of intersection, and at least part of the segments of each of the endless chains 1 are distributed at an angle to the common line of intersection. Wherein at least part of the segments of each of the endless chains 1 are fanned out in a fan-shaped projection in a plane passing through the common line of intersection. As shown in FIG. 24, FIG. 26, and FIG. 27, it is also possible to provide that at least two annular chains 1 are perpendicular to each other to form a cross or T-shaped structure. Furthermore, it can also be provided that at least part of the segments of the individual endless chains 1 are conically distributed with respect to the common line of intersection. The density of the cutting teeth 3 in the cutter array of this structure is dense and dense, and it is convenient for digging and discharging. Furthermore, it may be provided that the line of intersection of the plane of each of the two endless chains 1 is parallel to the reference line, and at least a part of the segments of each of the endless chains 1 are angularly distributed with the reference line. Preferably, the reference line is vertically arranged. Wherein at least part of the segments of the plurality of endless chains 1 are fan-shaped and distributed in a plane passing through the plane of the reference line; or at least part of the segments of the plurality of endless chains 1 are conically distributed with respect to the reference line. The density of the cutting teeth 3 in the cutter array of this structure is dense and dense, and it is convenient for digging and discharging.

For those skilled in the art, as shown in FIG. 11, the above arrangement of the endless chain 1 can be combined to form different cutting effects on the soil to meet different needs.

For the person skilled in the art, when the strip chain 1 is used instead of the endless chain 1, the spatial arrangement between the plurality of strip chains can also adopt the above structure. Of course, when the chains are replaced by tracks and chains, they can use the same spatial layout. For the endless chain 1, "the plane in which the endless chain 1 is located" refers to the plane in which the ring formed by the chain is located; this definition also applies to other annular chain carriers, that is, for a ring-shaped chain carrier, "the plane of the chain carrier" "" refers to the plane in which the ring formed by the chain carrier is located; and for the chain carrier of the strip, the "plane in which the chain carrier is located" refers to the plane formed by the direction in which the links are arranged.

As shown in FIG. 1 and FIG. 17, a plurality of cutting teeth 3 are provided on the endless chain 1, wherein the outer ends of the cutting teeth 3 protrude from the endless chain 1 and face the outer side of the endless chain 1, and the cutting teeth 3 are spaced along the endless chain 1. To form a tool array. It will be understood by those skilled in the art that in other embodiments, the inner side of the endless chain 1 can also be provided with cutting teeth 3, but the position is set to avoid the corresponding positions of the driving sprocket 1b and the driven sprocket 1c to avoid interference. The cutting teeth 3 are provided on the inner side of the endless chain 1 to facilitate further refinement of the soil in which the cutting teeth 3 on the outer side of the endless chain 1 are cut.

It should be noted that the cutting teeth 3 of the embodiment may have different structural forms, and the cutting teeth 3 may be directly mounted on the chain links of the chain, or may be directly mounted on the links of the endless chain 1 through the chain plates, or It is a structure that is integrally formed with a chain plate. The cutting teeth can be made into a multi-tooth saw-like structure, or can be a toothless or less toothed (three-tooth or less) tool shape; the pile drill bits configured with the two types of cutting teeth are described in detail below.

1. Pile machine drill bit with saw-like structure cutting teeth (see Figures 17-49)

Example 1

As shown in Fig. 17, a soil-stirred chain drill bit includes a cutting carrier 101 which is connected to the lower portion of the drill pipe and can be connected end to end in the circumferential direction (obviously, the cutting carrier 101 is a chain carrier). In a specific form, when the chain carrier is annular and the working mode is circumferential rotation, the chain carrier is the above-mentioned cutting carrier 101; as will be described later in detail, the surface of the cutting carrier 101 has a protrusion. Structure 2, the cutting carrier 101 includes an endless chain 1 to which a power mechanism is connected, and the power mechanism to which the endless chain 1 is connected is located at a lower portion of the drill pipe to form a power lowering, and the surface of the endless chain 1 has a convex structure 2 . Preferably, when the endless chain 1 is coupled to the drill pipe 100, the endless chain 1 is longitudinally disposed, that is, when the endless chain 1 is rotated, it is rotated deeper into the soil layer to loosen the soil. The raised structure 2 may be a blade or a cutter, may be integrally formed with the endless chain 1, and may be detachably fixed to the endless chain 1.

It will be understood by those skilled in the art that the cutting carrier 101 is used to carry the raised structure 2, the raised structure 2 is used to cut the soil, and the cutting carrier 101 may be an endless chain 1 such as a chain, a pulley or the like.

The endless chain 1 can be connected to a drill pipe 100 which is a prior art and can be a telescopic drill pipe or a lengthened drill pipe or a separate pole or the like. When the drill pipe 100 is connected to the endless chain 1, due to the rotation of the endless chain 1, the convex structure 2 forms a cutting and agitating action on the surrounding soil, and the soil is fully pulverized, if the annular chain 1 is added to the process of cutting and stirring the soil. For cement slurry or concrete slurry, the cement slurry and the soil can be fully stirred evenly, and a high-strength cement-soil mixing pile can be produced.

The power underlay completely solves the safety hazard caused by the power head set at the top end of the rack, especially the requirements of the bit torque and the bending strength of the drill pipe, such as the pile length of 50 meters and the diameter of 1 meter. To reach the height of a 20-story building, if the drill pipe diameter is increased by 2 meters, the pile can only be used for 200-storey buildings. The use of a power down can reduce the diameter of the drill pipe so that a small bore pile can be drilled. The diameter of the drill pipe under the power head is a minimum of 0.2 meters, and the minimum can be used for a 2-storey building, which is the minimum requirement for building a pile.

The prior art double-wheel milling groove machine can only be used for retaining piles with a water content of more than 70%, and the depth cannot be more than 30 meters. (In construction, if the water content of the engineering pile is so high, the quality is difficult to guarantee. It also does not meet the requirements of energy conservation and environmental protection.) There must be a large part of the two wheels of the two-wheel milling that cannot be dug the soil. 50% of the pile ends cannot enter the cement concrete, so the bearing capacity of the pile ends is directly reduced. 50%, even more terrible is the stability of the pile end, so it can not be used to carry the compression pile, only for the enclosure.

Powered down drills provide more efficient torque transfer and reduced power loss. The power-down can be used together with the telescopic drill pipe, which can greatly improve the drilling efficiency without connecting the drill pipe. The power under the chain cutting can effectively cut the soil, so that the cement and the soil can be more fully integrated to improve the performance of the mixing pile. The use of chain stirring can reduce the effective area of the drill bit into the soil, can reduce the replacement rate of the original soil, and effectively reduce the pollution caused by the replacement mud.

In order to achieve the above purposes, after repeated trials and improvements to improve the use of motors with good water and sealing performance, hydraulic motors are preferred, such as motors for two-wheel milling, but such motors directly drive the cutters to work inside the seals after entering the soil. It is easy to wear, has high maintenance costs and long time, so it is expensive to use. The general chain drill bit has a power source at the ground level, and the chain structure is complicated. It is very inconvenient to connect the chain to the deep hole. Once a power failure or circuit failure occurs, a long chain will be stuck and the whole machine will be Buried, the present invention is to solve a method which can make the motor not easy to wear for a long time and the soil is more evenly stirred.

The endless chain 1 is connected with a driving mechanism 11 and the driving structure 11 is located at a lower portion of the drill pipe 100. The driving mechanism 11 can drive the circular chain 1 to rotate circumferentially. The drive mechanism 11 can be an electric motor or a hydraulic motor.

For the connection of the drill pipe 100 to the endless chain 1, a connecting seat, a flange, a connecting frame or the like can be used. In the present embodiment, as shown in FIG. 17, the drill pipe 100 is coupled to the drive mechanism 11 by a flange, and the drive mechanism 11 is coupled to the endless chain 1 through the transmission assembly 11a, thereby achieving connection of the drill pipe 100 with the endless chain 1. The drive mechanism 11 may be a motor or a hydraulic motor, and the transmission assembly 11a may be a gear transmission or a pulley transmission.

The endless chain 1 is provided with a chain frame 1a. The chain frame 1a is provided with a drive sprocket 1b and a driven sprocket 1c. The drive sprocket 1b is connected to the drive mechanism 11. The chain frame 1a, the driving sprocket 1b and the driven sprocket 1c are all auxiliary structures required for chain rotation, which are known in the prior art and will not be described herein.

It should be understood by those skilled in the art that the convex structure 2 on the surface of the endless chain 1 may be recessed in the endless chain 1 or may protrude from the endless chain 1 , and the raised structure 2 may be fixedly connected to the endless chain 1 . It can also be a detachable connection.

In the present embodiment, as a preferred embodiment, the raised structure 2 includes cutting teeth 3 fixed to the endless chain 1 and the cutting teeth 3 protrude from the surface of the endless chain 1. The cutting teeth 3 are equally spaced on the endless chain 1, and the width of the cutting teeth 3 may be greater than the width of the endless chain 1, or may be smaller than the width of the endless chain 1, or equal to the width of the endless chain 1. Of course, as a preferred solution, it is preferred that both ends of the cutting tooth 3 extend 2-5 cm from the side of the endless chain 1.

The raised structure 2 may also be designed such that the outer surface of the endless chain 1 is designed to be uneven, that is, the heights of the links constituting the chain are different, so that the outer surface of the endless chain 1 naturally has irregularities.

When the circular chain 1 is rotated, the soil can be cut and stirred, but the cutting teeth 3 easily adhere to the soil, resulting in a decrease in cutting ability. As a preferred embodiment, in the present embodiment, the circular chain 1 has two The planes of the two endless chains 1 are located on the same plane, and the two endless chains 1 form a chain cutting assembly 6, and the cutting teeth 3 on the two endless chains 1 are interdigitated, when the two endless chains 1 rotate When the cutting teeth 3 on one of the endless chains 1 are inserted into the middle of the two cutting teeth 3 of the other endless chain 1, the soil in the middle of the cutting teeth 3 is scraped or removed, and the two cutting teeth 3 are kept in the middle without being soiled. Filled up to ensure the cutting effect of the cutting teeth on the soil.

Obviously, since the cutting teeth 3 on the two endless chain 1 in one chain cutting assembly 6 are interlaced, the interdigitated cutting teeth 3 must be operated in the same direction, which requires two endless chains 1 The circumferential rotation direction is reversed; therefore, the two endless chains 1 should be driven by the respective drive mechanisms 11 through separate transmission assemblies 11a, i.e., for the two endless chains 1 of the same chain cutting assembly 6, the drive mechanism 11 Not shared.

The chain cutting assembly 6 described above can form a planar cutting effect with a large cutting range. More preferably, the chain cutting assembly 6 has two groups and the two sets of chain cutting assemblies 6 are parallel to each other. The two sets of chain cutting assemblies 6 form a three-dimensional cutting effect, and the cutting and stirring speed is significantly improved. Although the present embodiment shows a solution of two sets of chain cutting assemblies 6, it does not mean that only two sets of chain cutting assemblies 6 can be used. Obviously, those skilled in the art can design three groups under the teaching of the solution. A combination of four or more chain cutting assemblies 6 .

A delivery tube assembly 5 capable of delivering slurry and/or compressed air is provided in the gap between the two sets of chain cutting assemblies 6. The feed pipe assembly 5 includes a slurry pipe 7 and a gas pipe 8, and the nozzles of the slurry pipe 7 and the gas pipe 8 extend to the middle of the endless chain 1. In the present embodiment, the extension of the nozzles of the slurry pipe 7 and the gas pipe 8 to the middle of the endless chain 1 means that the nozzles of the slurry pipe 7 and the gas pipe 8 do not extend outside the ring chain 1, and the ring chain 1 During the cutting process, the slurry pipe 7 is fed with cement slurry or concrete material, and the gas pipe 8 is input with compressed air to realize cutting and stirring at the same time, which can greatly improve the speed and efficiency of the cement soil mixing pile.

18 and 19, the chain cutter assembly 6 has two sets, and an auxiliary cutting assembly capable of rotating in the circumferential direction is provided at the end of the two chain cutter assemblies 6 near the end of the chain cutter assembly 6. 4. When there are two sets of the chain cutting assembly 6, there will be a gap in the middle, and the gap is easy to enter the soil, especially when the end of the chain cutting assembly 6 is adhered by the soil, the power required for the rotation is greatly improved, and the two groups are supplemented. The chain cutting assembly 6 is unable to cut the soil at the gap, at which time the auxiliary cutting assembly 4 is rotated to cut the soil at the gap and eliminate soil adhesion between the chain cutting assemblies 6.

The auxiliary cutting assembly 4 may be a sprocket located between the two sets of chain cutting assemblies 6, the sprocket being coupled to the drive sprocket 1b or the driven sprocket 1c on the chain cutting assembly 6, with the drive sprocket 1b or the driven chain The wheel 1c rotates synchronously. In the present embodiment, as shown in Fig. 19, the auxiliary cutting assembly 4 includes an auxiliary chain 9 and auxiliary teeth 10 fixed to the auxiliary chain 9, the auxiliary teeth 10 projecting from the surface of the auxiliary chain 9. A chain frame 1a, a drive sprocket 1b, and a driven sprocket 1c are also provided on the auxiliary chain 9. When the drill pipe 100 is coupled to the chain frame 1a, the connection to the endless chain 1 can be achieved. Of course, the chain frames 1a on the different endless chains 1 can also be connected to each other.

Obviously, as shown in Fig. 17, the two sprocket wheels of the auxiliary cutting assembly 4 are respectively connected to the driven sprocket 1c of the two endless chain 1 through the transmission shaft, but due to the driven sprocket on the two endless chain 1 The steering of 1c is reversed, so that it is not possible for both sprocket wheels of the auxiliary cutting assembly 4 to rotate synchronously with the respective driven sprocket 1c. One of the sprockets rotates synchronously with the driven sprocket 1c of the endless chain 1, the sprocket is fixedly coupled to the corresponding drive shaft, and the two do not rotate circumferentially; the other sprocket and the corresponding drive shaft are Slidingly engaged, so that the driven sprocket 1c does not drive the sprocket, and the sprocket only follows the other sprocket on the auxiliary cutting assembly 4 (i.e., the sprocket driven by the driven sprocket 1c of the endless chain 1) ) Synchronous rotation.

Example 2

This embodiment is basically the same as the structure and working principle of Embodiment 1, except that, as shown in FIG. 20 and FIG. 21, the endless chain 1 has two parallel lines, and the two endless chains 1 are not on the same plane. That is, there is a gap between the two endless chains 1, and an auxiliary cutting assembly 4 which is rotatable in the circumferential direction is provided at the ends of the two endless chains 1. It will be apparent to those skilled in the art, under the teachings of this scheme, that a combination of three, four or more annular chains 1 can be devised. The auxiliary cutting assembly 4 of the present embodiment is substantially the same as that of the first embodiment, and the auxiliary chain 9 is disposed laterally to fit the width of the endless chain 1.

In this embodiment, the endless chain 1 has a rectangular shape, and each of the corners is provided with a sprocket, one or two of which are the driving sprocket 1b, and the other is the driven sprocket 1c. When the driving sprocket 1b has two The differential should be used.

It should be understood by those skilled in the art that when the driving mechanism 11 is connected to the driving sprocket 1b, a common transmission structure such as a gear or a sprocket or a pulley can be adopted, and as shown in FIG. 21, the two annular chains 1 of the present embodiment are provided in the middle. A delivery tube assembly 5 capable of delivering slurry and/or compressed air. In this embodiment, the feed pipe assembly 5 includes a slurry pipe 7 and a gas pipe 8, and the slurry pipe 7 and the gas pipe 8 are located at a gap between the two annular chains 1, wherein the slurry pipe 7 is divided into a plurality of fork pipes. The mouth extends to the bottom and side walls of the endless chain 1.

In the present embodiment, the driving mechanism 11 is externally provided with a protective cover 11b to protect the driving mechanism 11. In this embodiment, the width of the endless chain 1 can be widened.

Example 3

The structure and working process of the embodiment are basically the same as those of the embodiment 2, except that, as shown in FIG. 22 and FIG. 23, the driving mechanism 11 in this embodiment is disposed at a gap between the two endless chains 1. The output of the drive mechanism 11 is directly connected to the drive sprocket 1b on the annular joint. The drill rod 100 is directly connected to the drive mechanism 11.

Example 4

This embodiment is basically the same as the structure and working process of Embodiment 1, except that as shown in FIG. 24 and FIG. 25, the endless chain 1 has at least two, and at least two axes of the endless chain 1 The hearts are perpendicular to each other.

Specifically, in this embodiment, two annular chains 1 are parallel to each other to form a chain cutting assembly 6, and the other two annular chains 1 are parallel to each other to form another chain cutting assembly 6, two chain cutting assemblies. 6 is perpendicular to each other to form a T-shaped structure.

The structure of the endless chain 1 of the present embodiment is the same as that of the embodiment 1, and the feed pipe assembly 5 can also be provided in the chain cutting assembly 6.

The embodiment has a T-shaped structure and can be directly used for making a T-shaped mixing pile without forming multiple drill bits to form a T-shaped structure. When the T-shaped pile is made by the drill bit of the embodiment, the effect is good, and the stirring effect is further improved. improve.

Example 5

The structure and working process of the embodiment are basically the same as those of the embodiment 4, except that, as shown in FIG. 26, the embodiment has two annular chains 1, wherein one of the circular chains 1 has the same structure as the first embodiment, and the other The structure of the endless chain 1 is the same as that of the embodiment 2, and the two endless chains 1 are perpendicular to each other to form a cross-shaped structure.

Example 6

The structure and the working process of the embodiment are basically the same as those of the embodiment 4, except that, as shown in FIG. 27, the embodiment has two annular chains 1, and the structures of the two annular chains 1 are the same as those in the first embodiment. The endless chains 1 are perpendicular to each other to form a cross-shaped structure.

Example 7

As shown in connection with Figures 28-30, the cutting carrier 101 has a plurality of strips and the projected ends of each two adjacent cutting carriers in the vertical direction coincide, and each two adjacent cutting carriers are vertically The centerlines of the projected ends of the directions can be connected in a triangle.

Each two adjacent cutting carriers 101 form a triangular cutting and agitating effect, and the cutting effect, that is, the stirring effect, is significantly superior to the combination of other forms of cutting carriers.

The cutting carrier 101 and the rest of the structure in this embodiment are the same as those of the above embodiment.

Example 8

This embodiment is basically the same as the embodiment except for the structure of the endless chain 1 and the cutting teeth 3. As shown in Fig. 31, the heights of the cutting teeth on the endless chain 1 are different, the cutting teeth 3 themselves form a saw-like structure, and the surface of the cutting teeth 3 has cutting small teeth (not shown). In the present embodiment, the raised structure 2 includes cutting teeth 3 fixed to the endless chain 1 and the cutting teeth 3 protrude from the surface of the endless chain 1. The cutting teeth 3 are equally spaced on the endless chain 1 and the cutting teeth are provided with cutting teeth similar to the saw blade.

Referring again to Figures 45 and 46, the plane of the partial cutting teeth 3 on the endless chain 1 is at an angle to the plane in which the endless chain 1 is located.

There are at least two annular chains 1 , and as shown in FIGS. 47 and 48 , at least one of the cutting teeth on the endless chain 1 forms an angle with the endless chain 1 at an angle such that the cutting teeth on the endless chain 1 are When the endless chain 1 is rotated in the circumferential direction, a fan-shaped cutting surface is formed.

As shown in connection with Figs. 45 and 46, the cutting teeth on the endless chain 1 are inclined in different directions so that the projection of the cutting teeth on the endless chain 1 in the vertical direction forms a sector.

A feed pipe assembly 5 capable of conveying slurry and/or compressed air is provided in the gap between two adjacent endless chains 1.

Example 9

The rest of the embodiment is the same as the above embodiment, except that, as shown in FIG. 33-44, there are several cutting carriers 101, and the projection in the vertical direction has one row or more rows. There is one or more cutting carriers 101 per row.

Example 10

As shown in FIG. 32, in the present embodiment, the convex structure 2 includes cutting teeth 3 fixed to the endless chain 1 and the cutting teeth 3 protrude from the surface of the endless chain 1. The cutting teeth 3 are equally spaced on the endless chain 1 and the cutting teeth 3 are inclined in the direction of one of the endless chains 1 in turn toward the other endless chain 1 as shown in Figures 47-48, on two adjacent endless chains 1 The cutting teeth 3 are interlaced with each other, preferably at an equal angle to 45 degrees, and the angularly inclined distribution of the cutting teeth 3 can be repeatedly distributed over one endless chain 1. By providing the cutting teeth 3 in this manner, the soil-saturated chain-type drill bit in the present embodiment can cut the rock in addition to cutting the soil, further expanding the application of the drill bit. The cutting teeth 3 can also be formed directly on the surface of the endless chain 1.

Example 11

This embodiment is basically the same as the structure of the other embodiments, except that, as shown in FIG. 49, the convex structure 2 on the surface of the endless chain 1 includes a link plate 1d fixed to the endless chain 1 and fixed to the link plate 1d. Cutting teeth 3 on.

The advantage of the chain drill shown in Embodiments 1 to 11 is that the endless chain can be directly connected with the drill pipe for easy replacement, and the rotation direction of the endless chain is a vertical rotation, and a convex structure or a cutting tooth is formed to form a The effect of longitudinal cutting, that is, the direction of rotation of the endless chain is parallel to the axial direction of the pile to be produced, and the pile making speed is significantly improved. During the cutting process of the cutting teeth to the soil, the soil is agitated along the circumferential direction of the endless chain. That is to complete the bottom to the top, and then from the top to the bottom of the cycle of stirring, the mixing is very uniform, which is conducive to the production of high-strength mixed cement soil mixing pile.

In contrast, the prior art has significant deficiencies. The traditional cement-soil mixing pile is a special drilling rig for deep mixing piles. The cement is injected into the foundation as a curing agent. The soft soil and the curing agent are forcedly mixed on the spot, and a series of physical and chemical reactions occur between the curing agent and the soft soil. It condenses into a cement-solid with integrity, water stability and high strength, and forms a high-quality composite foundation with a certain bearing capacity with the natural foundation. It has the advantages of fast pile forming speed, high efficiency, low cost, no vibration, no noise, no pollution. According to the state of using the reinforcing material, it is divided into two types: the slurry agitation method and the powder agitation method. The wet method is mainly cement slurry, which is evenly stirred compared with the dry method and is easy to be reclaimed. In the pile making method, the strength of the cement-soil mixing pile is mainly determined by the degree of combination of the slurry and the surrounding soil. For example, the slurry and the soil are not uniformly mixed, and the strength of the cement-soil mixing pile is greatly affected, that is, the strength will be reduce. The uniformity of the pile body is a key indicator of the pile quality of cement-soil mixing piles, but there is still the problem of uniform mixing and mixing during wet construction. Therefore, how to achieve uniform mixing of slurry and soil during the drilling process has become the key to current research.

The movable drill pipe [201510417309.5] of the patented cement soil mixing pile driver machine which the applicant applied for earlier includes a driving box body having an inner cavity, and the driving box body is provided with at least one through hole axially extending through the entire driving box body. a through-hole is provided with a circumferentially rotating and cylindrical guiding sleeve. The guiding sleeve is provided with a drill pipe extending through the entire driving box, and an axial guiding structure is arranged between the drill rod and the guiding sleeve, and the guiding sleeve is provided. A circumferential rotation mechanism capable of driving the circumferential rotation of the guide sleeve is connected, and the drill rod is connected with an axial drive mechanism 11 capable of driving the drill rod to axially reciprocate. The drill rod body of the solution can be axially stretched and can be axially slid while rotating in the circumferential direction, and is not easy to encounter the phenomenon of being unable to drill, increasing the circumference of the cross section of the cement-soil mixing pile after construction, and improving the cement. The pull-out resistance of soil mixing piles. However, this solution does not make a creative improvement in the bit structure, and the uniformity of the bit to the soil needs to be further improved. The chain drill of the present invention greatly improves the mixing uniformity and solves the problems in the prior art.

Second, the pile drill bit with blade-shaped cutting teeth (see Figures 1-5 and 50-55)

Example 12

As shown in FIG. 4 and FIG. 5, in conjunction with FIGS. 1 to 3, the endless chain 1 is provided with at least one row of cutting teeth 3 distributed along the longitudinal direction of the endless chain 1, and rows are arranged between the cutting teeth 3 of adjacent columns. Soil clearance. The number of columns of cutting teeth 3 can be determined as needed. The cutting tooth 3 includes a connecting portion 34 and a working portion 35 provided on the connecting portion 34. In this embodiment, the working portion 35 and the connecting portion 35 are integrally connected, and the connecting portion 35 is provided with a mounting hole 33 through which the cutting teeth 3 are fixedly mounted to the endless chain 1; wherein the cutting teeth 3 can also be set It is on any one or more of the link inner plate 201, the link outer plate 202, the link pin shaft 203, and the like of the endless chain 1. The cutting teeth 3 of adjacent columns should not be too close to avoid affecting the soil discharge. However, it should not be too sparse, so as not to affect the efficiency of excavation or affect the lateral size. After being mounted on the endless chain 1, the working portion 35 protrudes from the endless chain 1 and faces the outside of the endless chain 1.

As shown in FIG. 5, as can be seen in conjunction with FIG. 1 and FIG. 2, each of the cutting teeth 3 in the adjacent rows of cutting teeth 3 is also disposed in a right direction or in a misaligned position; and, in adjacent rows of cutting teeth 3 The bending and/or twisting of the outer ends of the cutting teeth 3 may be in the same direction or in the opposite direction, and these may be specifically set according to specific soil discharging requirements.

As shown in Fig. 5, it can be seen in conjunction with Figs. 50-54 that in the present embodiment, the cutting teeth 3 are made of a sheet material, but the equivalent cutting width of the cutting teeth 3 is larger than the thickness of the cutting teeth 3. The equivalent cutting width refers to the sum of the actual excavation widths of the cutting teeth 3 being excavated at the time of cutting. If the excavated portion formed by the cutting teeth 3 is continuous, the equivalent cutting width is the width of the excavated portion; if the excavated portion formed by the cutting teeth 3 is discontinuous, the equivalent cutting width is excavated The sum of the widths of the parts of the part.

The manner of achieving the "equivalent cutting width of the cutting teeth 3 is greater than the thickness of the cutting teeth 3" is as follows: (1) arranging the cutting teeth 3 obliquely to the running direction of the cutting teeth 3; (2) extending the extending direction of the working portion 35 with the cutting teeth The running direction of 3 is set parallel or at an acute angle, and the working portion 35 is laterally bent and/or twisted with respect to the running direction of the cutting teeth 3.

The second method is more preferable because the bending and/or twisting can not only effectively increase the excavation size of the single cutter, but also form the drain surface 36 on the working portion 35, which is favorable for discharging soil and facilitating soil compaction. The combination of the two further improves the excavation efficiency; in addition, it is also advantageous for the subsequent agitation of the excavated soil. As can be seen from FIG. 55, the angle of the bending and/or torsional extension of the working portion 35 is relative to the cutting teeth 3 The running direction is acute (α, which can be 30° to 60°). At this bending and/or torsion angle, not only the structure of the cutting teeth 3 is relatively stable, the force is reasonable, and the earth discharging efficiency is high.

As shown in FIG. 50 and FIG. 51, the outer end of the cutting tooth 3 may be flat or pointed; as shown in FIG. 52, FIG. 53, and FIG. 54, the working portion 35 may further be provided with at least one slit 32, thereby The outer end of the cutting tooth 3 is divided into at least two cutting portions 31, and at least two cutting portions 31 are not in the same plane. The respective cutting portions 31 are laterally bent and/or twisted with respect to the running direction of the cutting teeth 3. At least two of the cutting portions 31 have different extending directions or different angles. The number of slits 32 can be specifically designed according to specific needs. After the slit 32 is provided, the excavated rock and soil can be scattered from the slit 32, which not only expands the cutting size of the cutting teeth 3, but also facilitates further refinement of the rock and soil, and the drainage efficiency is further improved.

In the present application, the cutting tooth 3 may be a split cutter fixedly mounted on the endless chain 1 or an integral cutter integrally formed with the components constituting the endless chain 1. As shown in Figs. 50 to 54, when the split cutter is used, the mounting hole 33 for attaching the cutter teeth 3 to the endless chain 1 can be formed on the cutter teeth 3.

As shown in FIG. 2, in the embodiment, the chain rack 1a is further provided with a delivery pipe assembly. The feed pipe assembly is disposed between two adjacent annular chains 1 disposed. Therefore, in the process of cutting the rock soil by the endless chain 1, the conveying pipe assembly can spray or jet the rock into the rock to realize the side excavation and stirring.

The composition and arrangement of the delivery tube assembly in this embodiment are the same as in the first to eleventh embodiments.

The advantages of the pile driver drill shown in Embodiment 12 are as follows: (1) The distribution of the cutting teeth is reasonable, which is conducive to the refinement of the rock and soil, improve the structural strength of the cement mixing pile, avoid floating piles, and significantly reduce the crowding of surrounding rock and soil. (2) The outer end of the cutting tooth is bent or twisted, so that the equivalent cutting width of the cutting tooth is larger than the thickness of the cutting tooth, which can not only effectively improve the excavation size of the single cutting tooth, but also facilitate the soil discharging and facilitate the soil thinning. In addition, it is also advantageous to carry out subsequent agitation work on the excavated soil; (3) the working part of the cutting tooth has at least one slit, which makes the working part be at least two cutting parts, so the excavated rock soil It can be spread out from the incision, which not only expands the cutting size of the cutting teeth, but also facilitates further refinement of the geotechnical soil, and the drainage efficiency is further improved. (4) The cutting teeth are arranged on the working part to make the drainage surface, so that the working part is The geomaterial under cutting can be thrown along the dump surface to the side of the working part, which avoids the fact that the rock is affected by the accumulation of the cutting tooth after the cutting, which affects the cutting process, causes power loss, and the soil is re-plated. Blocking, easy to refine the soil, improve the efficiency of rock and soil pulverization, and facilitate the subsequent mixing operation of the excavated soil; (5) The cutting teeth are flat and long, made of sheet material, which makes the cutting teeth The outer end can cut into the soil layer more quickly and smoothly, and the crushing effect on the rock and soil is good.

Example 13

A pile driver includes a drill pipe to which a pressing power device 205 is connected, and a plurality of pile chain drill bits as in the twelfth embodiment are provided at a lower end of the drill pipe. Preferably, there are a plurality of chain racks 1a, and each of the chain racks 1a is sequentially spaced apart in the extending direction of the drill pipe. The connection manner between the chain frames 1a may be a connection manner such as welding, snapping, fastening, etc., which can achieve a firm connection.

Example 14

A pile driver includes a drill pipe 100 to which a pressing device 205 is connected. The lower end of the drill pipe 100 is provided with a soil agitating chain drill as in Examples 1-11.

In the embodiments 13 and 14, the drill bit is disposed at the lower end of the drill pipe 100 to which the pressing power device 205 is connected. When the excavation is performed, the pressing power device 205 can significantly improve the cutting ability of the tool, and is similar to milling, boring, Cutting excavation.

In the above-described pile driver bit structure having two types of cutting teeth, there are other differences besides the cutting teeth 3. It will be appreciated that these differences can be interchanged as needed. For example, the "bit holder" type chain frame used in Figures 1-3 can also be installed in Figures 17-24; for example, the auxiliary cutting assembly used in Figures 17-24 can also be installed in Figure 1 when needed. ~3 The bottom end of the medium chain carrier. Such replacements are numerous and will not be explained in detail here.

In the above embodiments, the power down mode is preferably employed, which is of course not necessary. It is worth noting that when the power lowering mode is adopted, the driving mechanism 11 such as a motor is installed in the drill bit seat. In order to prevent the entry of foreign matter such as water and mud, a reliable sealing mechanism should be adopted for the power lower part, as exemplified below.

As shown in Fig. 56, the power unit sealing structure of the present embodiment is disposed between the drive mechanism 11 (e.g., a hydraulic motor, a motor, etc.) and the drive sprocket 1b.

As shown in FIG. 56 and FIG. 59, the drive main shaft 11c of the drive mechanism 11 is fixedly mounted with a drive sprocket 1b, wherein the sleeve 1ba of the drive sprocket 1b is sleeved on the outer peripheral surface of the output spindle 11c; and the output spindle 11c is fixedly mounted. And a flange 11e is sealingly fitted. At an end facing the one end of the driving mechanism body 11d, an annular step 1bb is formed on the inner circumference of the sleeve 1ba, and the annular step 1bb abuts against the flange 11e; the sleeve 1ba is provided Through the first mounting holes 1bc of the sleeve 1ba, the first mounting holes 1bc are strip-shaped and extend axially along the sleeve 1ba, and the flange 11e is provided with a uniform position and aperture with each of the first mounting holes 1bc. A corresponding second mounting hole is mounted with a hexagon socket head cap screw 1e in the associated first mounting hole 1bc and the second mounting hole; thereby mounting the drive sprocket 1b to the output spindle 11c of the drive mechanism 11.

In order to facilitate the installation and disassembly, in this embodiment, the hexagon socket head cap screw 1e is mounted on the sleeve 1ba from the end of the sleeve 1ba away from the end of the drive mechanism body 11d, and the end face of the hexagon socket head cap screw 1e and the sleeve 1ba A spring washer 1f is provided between them. In addition, the position can also be installed with a gasket; this is achieved by a threaded seal and a gasket seal for better sealing.

Of course, in addition to the hexagon socket head cap screw 1e, other conventional screw forms can be used; in addition to the spring washer 1f, other conventional elastic spacers can be selected.

A static seal can be achieved between the flange 11e and the output spindle 11c by means of a gasket or an oil seal.

As shown in FIG. 56, the sealing mechanism of the present embodiment includes a sealing cover 300 including a first end 302 and a second end 303 which are integrally provided. The sealing cover 300 may be in the shape of a cylinder in Fig. 56, the second end of which is open, and the first end is a cylindrical bottom having a central hole. Of course, the sealing cover 300 can also adopt a structure such as a hemispherical cover, as long as the sealing is facilitated.

As shown in FIG. 56 and FIG. 60, the first end 302 of the sealing cover 300 is fixedly mounted on the driving mechanism body 11d, and the first end 302 has a first close contact with the outer peripheral surface of the cover 11f of the driving mechanism body 11d. The annular end surface 304 and the second annular end surface 305 closely fitting with the outer circumferential surface of the body 11g of the driving mechanism body 11d, the connecting surface 306 of the first annular end surface 304 and the second annular end surface 305 are attached to the outer end surface of the cover 11f. A plurality of third mounting holes 307 are defined in the first end 302 at the position where the connecting surface 306 is located. The cover 11f is provided with a plurality of fourth mounting holes 11h corresponding to the positions of the third mounting holes 307. A fastening bolt may be disposed between the matching third mounting hole 307 and the fourth mounting hole 11h; and may also be between the first annular end surface 304 and the outer circumferential surface of the cover 11f, the second annular end surface 305 and the outer circumference of the body 11g. A gasket is provided between the faces and between the joint face 306 and the outer face of the cover 11f to form a static seal. In this embodiment, the aperture of the third mounting hole 307 is larger than the aperture of the fourth mounting hole 11h, so that the nut of the fastening bolt can abut against the outer edge of the opening of the fourth mounting hole 11h.

As shown in Fig. 57, the second end 303 of the sealing cover 300 is fitted to the sleeve 1ba; at the end of the sleeve 1ba toward the end of the driving mechanism body 11d, the outer periphery of the sleeve 1ba is provided with a guiding surface 1bd, and the sealing cover is provided When the bracket 300 is mounted on the sleeve 1ba, the guide surface 1bd can guide the seal cover 300. Of course, the guide surface 1bd may be a flat or curved surface.

As shown in FIG. 57 and FIG. 58 , a dynamic sealing element is disposed between the second end 303 of the sealing cover 300 and the sleeve 1ba, and the inner sealing ring 301 is disposed in the sealing cover 300 for axially limiting the dynamic sealing element. At the end of the sealing cover 300, a sealing cover end cover 400 serving as an outer stop ring is fixedly mounted. In this embodiment, the sealing cover end cover 400 includes a cover body 401 fastened to the end surface of the sealing cover 300 by a fastening bolt 403. The cover body 401 is disposed between the sealing cover 300 and the sleeve 1ba, and is respectively sealed with the sealing cover. The sleeve and the sleeve 1b are sealingly engaged with the extension portion 402. The extension portion 402 is disposed opposite the inner stop ring 301 to form an annular receiving space for receiving the dynamic sealing member. It can be understood that the sealing cover end cover 400 and the sealing cover 300 can also be directly disposed in a threaded engagement (ie, the extension portion 402 has an external thread, and the sealing cover has an internal thread that cooperates with the external thread), such that The fixation of both can be achieved by rotating the seal cover end cap 400.

In this embodiment, the dynamic sealing element includes a sealing ring 500, and the sealing ring 500 is positioned inside the sealing cover 300, and the sealing ring 500 is closely adhered to the inner circumferential surface of the sealing cover 300 and the outer circumferential surface of the sleeve 1ba. The sealing ring 500 is slidably sleeved on the sleeve 1ba. The annular sealing surface 503 on the inner circumference of the sealing ring 500 is provided with a plurality of annular grooves 502, and the annular grooves 502 are axially spaced along the sleeve 1ba; and the outer circumference of the sealing ring 500 The end portion is provided with an annular notch 501, and the annular notch 501 is embedded with an elastic ring 600 in a pressed state. When not pressed, the size of the elastic ring 600 in the radial direction of the sealing ring 500 is larger than the radial dimension of the annular notch 501 in the radial direction of the sealing ring 500, so that the elastic ring 600 can protrude toward the outer side of the annular notch 501 toward the sealing cover 300, so that The sealing cover 300 presses the elastic ring 600; the elastic ring 600 in the pressed state can be closely fitted to the sealing ring 500 and the sealing cover 300, respectively.

In this embodiment, the cross section of the annular groove 502 may be rectangular, curved or wedge-shaped, which is not limited in this application. However, the cross section of the annular groove 502 near the side of the drive mechanism body 11d is preferably wedge-shaped, and the depth of the wedge shape gradually increases from the side close to the drive mechanism 11 toward the side away from the drive mechanism body 11d. This is because the annular groove 502 having a wedge-shaped cross section can not only be deformed rapidly, but also the wedge surface can be in sealing contact with the outer peripheral surface of the sleeve 1ba as quickly as possible; the depth of the wedge is closer to the side of the drive mechanism body 11d. Small, on the side close to the drive mechanism body 11d, the outer peripheral surface of the sleeve 1ba and the seal ring 500 are more easily sealed, and the connection portion between the drive sprocket 1b and the output spindle 11c of the drive mechanism 11 and the output spindle 11c are ensured. The connection between the drive mechanism bodies 11d is preferentially sealed.

In this embodiment, there are at least two dynamic sealing elements, and an isolating ring 700 fitted to the sleeve 1ba is disposed between the adjacent dynamic sealing elements. The sealing ring 500 and the spacer ring 700 are all made of a hard non-metal wear-resistant material, wherein the polymer wear-resistant material may be a ceramic composite material, silicon carbide (SiC), silicon nitride (Si ₃ N ₄ ), and Tough zirconia (Y ₂ O ₃ + ZrO ₂ ), toughened aluminum oxide (Al ₂ O ₃ /ZrO ₂ ), and the like.

The working principle of the power device sealing structure of this embodiment is:

After the assembly is completed, the inner stop ring 301 and the seal cover end cover 400 function to position the dynamic sealing element such as the seal ring 500, wherein the seal ring 500 is in close contact with the inner side wall of the seal cover 300 and the outer peripheral surface of the sleeve 1ba, and the elastic ring 600 The rubber is elastically deformed by being squeezed, and is expanded between the annular notch of the sealing ring 500 and the sealing cover 300 to further deform the sealing ring 500, thereby achieving self-tightening, thereby achieving a better sealing effect. The annular groove 502 facilitates deformation of the seal ring 500 to improve the sealing effect. In the event that a foreign matter enters the gap between the seal cover end cover 400 and the seal cover 300, the elastic ring 600 is further pressed, so that the seal ring 500 follows the deformation, so that the seal ring 500 fits tightly with the sleeve 1ba and the seal cover 300. Thereby effectively improving the sealing effect.

Example 15

A pile-type chain drill bit, on the basis of the above embodiments, the number of chain carriers can be only one. In order to stabilize the chain carrier, the effect of the anti-torque during the excavation process is effectively reduced or eliminated, and the chain carrier is located. The chain drive mechanism 204 in the chain frame 1a is driven to drive the chain carrier to reciprocate on the chain frame 1a. The chain frame 1a is located at a lower portion of the drill pipe 100. The chain frame 1a is provided with a power unit 205, and the power output end of the power unit 205 is connected to the power input end of the chain transmission mechanism 204.

As shown in FIGS. 61-62, the present embodiment discloses two technical solutions capable of reciprocating the chain carrier. In the first solution, the power unit 205 has a power output end that can rotate circumferentially, and the chain transmission mechanism 204 includes a transmission. The rod 801 and the lower sprocket are fixedly connected to the power output end of the power unit 205 and driven to rotate by the power output end. The lower sprocket is disposed at the lower part of the chain frame 1a, and the chain carrier is wound around the lower chain. The wheel 1a and the two ends of the chain carrier are respectively connected to both ends of the transmission rod through the crank slider mechanism 802; the power unit 205 drives the transmission rod 801 to rotate and drives the chain carrier to reciprocate on the chain frame through the crank slider mechanism 802. In the second solution, the power unit 205 has a power output end that can expand and contract in the vertical direction, and the power unit has two. The chain transmission mechanism 204 includes a lower sprocket, and the lower sprocket is disposed at a lower portion of the chain frame 1a, and the chain carrier is wound. The two ends of the chain carrier are respectively connected to the power output end of the power device 205; the power output ends of the two power devices are alternately extended and contracted to drive the chain carrier to reciprocate.

In the first solution, the power unit 205 may be a motor or a hydraulic motor. In the second embodiment, the power unit 205 may be a cylinder or a cylinder, and the power unit 205 may be mounted on the same side of the chain frame 1a, and two power units. The power output ends of the 205 are respectively arranged vertically upwards and vertically downwards. At this time, an upper sprocket is also required, and the chain carrier is wound around the upper sprocket and the lower sprocket, and the two ends of the chain carrier are respectively connected to two. The power output end of the power unit 205 forms a partial ring shape, and the power output ends of the two power devices alternately expand and contract to drive the chain carrier to reciprocate. Or the power devices are respectively installed on two sides of the chain frame 1a, the power output ends of the two power devices 205 are all disposed downward, the chain carrier is wound around the lower sprocket, and the two ends of the chain carrier are respectively connected to the two power devices. The power output end of the 205 is formed in a partial ring shape, and the power output ends of the two power units 205 are alternately extended and contracted to drive the chain carrier to reciprocate.

It should be mentioned that when the reciprocating oscillating technical solution is adopted, the chain carrier can also be arranged in multiple pieces and arranged in the above-mentioned arrangement, and the structure of the power unit and the chain transmission mechanism can be adjusted accordingly, here No longer expand in detail.

Claims

A pile driver chain drill bit, comprising a chain frame (1a), characterized in that: the chain frame (1a) is provided with at least one chain carrier, and the chain carrier is provided with a plurality of cutting teeth ( 3), the outer end of the cutting tooth (3) protrudes from the chain carrier and faces the outer side and/or the inner side of the chain carrier, and the chain carrier is driven by a chain transmission mechanism (204) located in the chain frame (1a) to drive The chain carrier swings circumferentially or reciprocally on the chain frame (1a).
A pile driver chain drill according to claim 1, characterized in that the cutting teeth (3) are spaced apart along the chain carrier to form a cutting tooth array on the chain frame (1a).
The pile driver chain drill according to claim 1, wherein the number of chain carriers is two or more, wherein at least two chain carriers run in opposite directions, and each chain carrier rotates or The torque generated by the reciprocating oscillations cancels or at least partially offsets the torque.
The pile driver chain drill according to claim 3, wherein the chain frame (1a) is located at a lower portion of the drill pipe, and the power frame (205) is provided in the chain frame (1a), and the power device (205) The power output is coupled to the power input of the chain drive (204).
The pile driver chain drill according to claim 4, wherein the chain frame (1a) is an integrally arranged, multi-stage bent rod-shaped box (1aa) mechanism, and the chain frame (1a) includes At least two rod-shaped boxes (1aa).
The pile driver chain drill according to claim 5, wherein the power unit (205) comprises a plurality of driving mechanisms (11), and the driving mechanism (11) is sequentially arranged from the top to the bottom on the chain frame (1a). They are arranged and respectively in different rod-shaped boxes (1aa). The pile driver chain drill according to claim 6, wherein the chain carrier is annular, and the chain transmission mechanism (204) includes an upper sprocket provided on the chain frame (1a) and a lower sprocket, the chain carrier is wound on the upper sprocket and the lower sprocket, and the driving mechanism (11) drives the upper sprocket or the lower sprocket; the lower sprocket is arranged at a height in the chain frame (1a) )on.
The pile driver chain drill according to claim 7, wherein a sealing structure is provided between the upper sprocket and/or the lower sprocket and the power unit (205), and is connected to the power unit (205). a sprocket and/or a lower sprocket as a driving sprocket (1b), the driving sprocket (1b) being mounted on an output main shaft (11c) of the power unit (205); the sealing structure comprising a power unit body (11d) a sealing cover (300) between the driving sprocket (1b), the first end of the sealing cover (300) is fixedly mounted to the power unit body (11d), and the second end of the sealing cover (300) is sleeved on a power wheel bushing (1ba), and a static sealing element is disposed between the first end of the sealing cover (300) and the power unit body (11d), and the second end of the sealing cover (300) and the power wheel bushing ( A dynamic sealing element is provided between 1ba).
The pile driver chain drill according to claim 1, wherein the number of the chain carriers is one, and the chain carrier is driven by a chain transmission mechanism (204) located in the chain frame (1a) to drive the chain. The carrier is reciprocally oscillated on the chain frame (1a); the chain frame (1a) is located at the lower part of the drill pipe, and the power frame (205) is provided in the chain frame (1a), and the power output of the power unit (205) It is connected to the power input end of the chain transmission mechanism (204).
The pile driver chain bit according to claim 9, wherein said power unit (205) has a power output end that is rotatable in a circumferential direction, and the chain transmission mechanism (204) includes a transmission rod (801) and a lower sprocket. The middle portion of the transmission rod (801) is fixedly connected to the power output end of the power unit (205) and driven to rotate by the power output end. The lower sprocket is disposed at a lower portion of the chain frame (1a), and the chain carrier is wound around the lower chain. Both ends of the wheel and chain carrier are respectively connected to both ends of the transmission rod (801) through a crank slider mechanism (802); the power unit (205) drives the transmission rod (801) to rotate and drives the chain through the crank slider mechanism (802). The carrier is oscillated back and forth on the chain frame (1a).
The pile driver chain drill according to claim 9, wherein the power unit (205) has a power output end that can expand and contract in a vertical direction, and the power unit (205) has two chain transmission mechanisms (204). The lower sprocket is disposed at a lower portion of the chain frame (1a), the chain carrier is disposed around the lower sprocket, and the two ends of the chain carrier are respectively connected to the power output end of the power device (205); The power output end of (205) is alternately telescoped to drive the chain carrier to reciprocate.
A pile driver chain drill according to any one of claims 2-11, characterized in that the cutting teeth (3) are made of sheet material, the direction of extension of the cutting teeth (3) and the cutting teeth (3) The running direction of the cutting teeth is parallel or at an acute angle, and the equivalent cutting width of the cutting teeth (3) is larger than the thickness of the cutting teeth (3).
The pile driver chain drill bit according to claim 12, characterized in that the outer end of the cutting tooth (3) is laterally bent and/or twisted with respect to the running direction of the cutting tooth (3), thereby cutting the tooth (3) Forming a drain surface.
The pile driver chain drill according to claim 13, characterized in that the angle of the bending and/or torsional extension of the outer end of the cutting tooth (3) is at an acute angle with respect to the running direction of the cutting tooth (3); The acute angle is 30° to 60°.
The pile driver chain drill according to claim 14, wherein the outer end of the cutting tooth (3) has at least one slit, so that the outer end of the cutting tooth (3) is divided into at least two cutting portions (31) And at least two cutting portions (31) are not in the same plane.
The pile driver chain drill according to claim 15, wherein each cutting portion (31) is laterally bent and/or twisted with respect to the running direction of the cutting teeth (3); and at least two of said The extending direction of the cutting portion (31) is different or the angle is different.
The pile driver chain drill according to claim 1, wherein the chain carrier is provided with at least two rows of cutting teeth (3) distributed along the longitudinal direction of the chain carrier, and cutting teeth of adjacent columns ( 3) There is a drain gap between them; wherein each cutting tooth (3) in the adjacent row of cutting teeth (3) is disposed or misaligned; each cutting tooth in the adjacent row of cutting teeth (3) (3) The outer end is bent and/or twisted in the same direction and/or in the opposite direction.
The pile driver chain drill according to any one of claims 1 to 11, characterized in that the cutting teeth (3) are separate cutting teeth fixedly mounted on a chain carrier;

Wherein, both ends of the cutting tooth (3) are respectively fixed with the pin shafts of the adjacent links; or both ends of the cutting teeth (3) are fixed on the link inner plate and/or the link outer plate of the link.
The pile driver chain drill according to any one of claims 1 to 11, wherein the cutting teeth (3) are integrally cut teeth integrally formed with the members constituting the chain carrier.
The pile driver chain drill according to any one of claims 1 to 11, characterized in that the chain frame (1a) is disposed at a lower end of a drill pipe to which a pressing power device is connected.
The pile driver chain drill according to claim 1, wherein the number of the chain carriers is four, four planes of the chain carrier are arranged in parallel with each other, and four of the chain carriers are arranged in parallel. The projections in a plane parallel to the plane of the chain carrier overlap; the partial segments overlapping in the projection in a plane parallel to the plane of the chain carrier are arranged vertically so that the upper cutting teeth (3) are formed Vertical plane cutting tooth array.