CN215672026U

CN215672026U - Side squeezing and lifting type soil squeezing device

Info

Publication number: CN215672026U
Application number: CN202121897214.5U
Authority: CN
Inventors: 孙浩; 项羽佳
Original assignee: Shandong Tuli Machinery Technology Co ltd
Current assignee: Shandong Tuli Machinery Technology Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-01-28
Anticipated expiration: 2031-08-13

Abstract

The utility model provides a side-extrusion lifting-expansion type soil extrusion device which comprises a power head, a drill rod, a hole forming head and a drill bit, wherein two ends of the drill rod are respectively connected with the power head and the hole forming head, the power head drives the drill rod and drives the hole forming head to rotate, the drill bit and one end of the hole forming head, which is far away from the drill rod, are fixedly connected, the periphery of the end, which is close to the drill bit, of the hole forming head is provided with a helical blade, the upper side of the helical blade is provided with a cylindrical extrusion blade, a straight bus of the extrusion blade is parallel to the axis of the hole forming head, one end of a collimation line of the extrusion blade is overlapped with the peripheral surface of the hole forming head, and a support rib is arranged between the inner side surface of the extrusion blade and the peripheral surface of the hole forming head. The utility model overcomes the defects of the prior art, reduces the shaft pressure and torque required during pore-forming, reduces the power and volume of the equipment, and is beneficial to the popularization and application of the equipment.

Description

Side squeezing and lifting type soil squeezing device

Technical Field

The utility model relates to the technical field of civil engineering, in particular to a side-extrusion lifting-expanding type soil extrusion device.

Background

At present, in the field of foundation construction in China, the construction of non-soil discharging piles is mainly driven or static pressure. As technology and equipment advances, the use of compacted piles is increasing. Because it has the advantages of no soil discharge, less pollution, high efficiency, etc., it is very popular with construction side. But their construction weak points are also more prominent, such as hammering and driving construction noise and discharge pollution, and hammering itself also destroys the quality of the pile body. The static pressure construction equipment is huge, high in carrying and transition cost and poor in penetrating capability of the pile, particularly a sand layer. The cast-in-place construction can overcome the defects of the construction, and the cast-in-place pile has higher safety and stronger stability. The pile type of the existing cast-in-place pile mainly takes a round pile as a main part, and then a square pile is used.

In the traditional construction process, mechanical equipment used in cast-in-place pile construction mainly comprises a rotary drilling machine, an impact drilling machine, a long spiral drilling machine and the like, which are non-soil-squeezing cast-in-place piles, soil is taken out in the hole forming process, so that the stress of the soil is dissipated, and the bearing capacity of the piles is low. The existing spiral rotary soil-extruding technology needs equipment to provide large axial pressure to enable the drill bit to advance, and the spiral grooves participate in friction work to enable the drill bit to rotate by large torque, so that the construction efficiency is low, and the required equipment cost is high. These all restrict the crowded stake technique and use widely.

One problem with the prior friction dominated load bearing pile types is that the surface area is not optimised, i.e. the maximum outer pile surface area is achieved with the minimum amount of concrete.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a side-squeezing, lifting and expanding type soil squeezing device which can effectively reduce the descending resistance and the required torque of a pore-forming head, further improve the working efficiency and reduce the equipment investment, and can increase the outer surface area of a pile body by arranging an expanding blade on the pore-forming head so as to achieve the purpose of improving the bearing capacity of the pile body.

The technical scheme of the utility model is as follows:

the utility model provides a crowded native device of formula of expanding is carried to side extrusion, includes unit head, drilling rod, pore-forming head and drill bit, and the both ends of drilling rod link to each other with unit head and pore-forming head respectively, and unit head drive drilling rod drives the pore-forming head and rotates, and the drill bit is fixed continuous with the one end that the pore-forming head kept away from the drilling rod, the tip periphery that the pore-forming head is close to the drill bit is equipped with helical blade, helical blade's upside is equipped with the extrusion blade of face-like form, and extrusion blade's straight generating line is parallel with the axis of pore-forming head, and the one end of extrusion blade's alignment coincides with global of pore-forming head, and extrusion blade's medial surface and pore-forming head are equipped with the support rib between global.

Specifically, the axis of the extrusion blade wound into the hole head rotates to form a virtual cylinder, one end of the alignment line of the extrusion blade coincides with the circumferential surface of the hole head, the other end of the extrusion blade coincides with the circumferential surface of the virtual cylinder, and the diameter of the virtual cylinder is larger than that of the hole head.

The number of the extrusion blades can be 1 or more, the more the number of the extrusion blades is, the larger the torque required by the rotation of the pore-forming head is, but the efficiency is higher, the number of the extrusion blades can be configured according to the diameter of the pile hole, and the structure of one extrusion blade is the best choice for large diameter.

In an alternative aspect of the present invention, the support rib is a plate-like structure extending from the connecting end of the pressing blade and the circumferential surface of the pore-forming head to the opening end, and the support rib is perpendicular to the axis of the pore-forming head;

in another alternative, the supporting rib is rod-shaped, and the supporting rib is arranged between one end of the extrusion blade far away from the peripheral surface of the pore-forming head and the peripheral surface of the pore-forming head.

The side squeezing, lifting and expanding type soil squeezing device is arranged on a pile frame, the power head, the drill rod, the hole forming head and the drill bit are sequentially connected, the power head drives the drill rod to provide torque, downward pressure and lifting force for the drill rod, and the driving force of the power head is transmitted to the hole forming head and the drill bit through the drill rod.

The extrusion blades are arranged on the periphery of the pore-forming head, so that the drilled soil can be extruded to the inner wall of the pile hole, the pile hole with the diameter slightly larger than that of the drill rod is extruded, the bearing capacity of the pile is improved, and the descending resistance of the drill rod is reduced.

The boring head sequentially comprises a drill bit core pipe section and an expansion section from bottom to top, wherein the spiral blade and the extrusion blade are arranged in the drill bit core pipe section, the expansion section comprises a tubular shell and a pull rod body arranged in the shell, the drill bit core pipe section is fixedly connected with the shell, the pull rod body and the shell are in sliding connection in the axial direction of the shell, a key for limiting the relative rotation of the pull rod body and the shell in the circumferential direction is further arranged between the pull rod body and the shell, an upper-lower sliding limiting mechanism is arranged between the pull rod body and the shell, so that the expansion section can conduct downward pressure and lifting force from a power head to the drill bit core pipe section, an expansion blade groove is formed in the end part, close to the drill bit core pipe section, of the shell, of the expansion blade groove penetrates through grooves in the two sides inside and outside of the shell, expansion blades are arranged in the expansion blade groove, the upper ends of the expansion blades are hinged to an expansion blade groove wall, and one end, far away from an expansion blade hinge joint, of the expansion blade, is arranged between the pull rod body and the shell, when the pull rod body slides upwards relative to the shell, is pushed And an expanding mechanism for expanding the vane grooves.

The expansion blade is arranged on the hole forming head, when in drilling construction, the power head applies torque and downward pressure to the drill rod, the drill rod transmits the torque to the pull rod body, the torque and the downward pressure are transmitted to the shell through the limiting mechanism and the key between the pull rod body and the shell, and then the torque and the downward pressure are transmitted to the core pipe section of the drill bit and the drill bit, so that the drilling construction is carried out. In the drilling process, the expansion blade is retracted in the expansion blade groove, when the drilling depth meets the requirement, the power head, the drill rod and the pull rod body start to be lifted, the pull rod body slides relative to the shell, the lower end of the expansion blade is pushed out of the expansion blade groove by the expansion mechanism, and after the expansion blade extends out of a specific height, the pull rod body and the shell are limited by the limiting mechanism to continuously slide relative to each other, so that the pull rod body transmits the lifting force to the shell.

At the moment, the power head independently applies torque, the hole forming head rotates, and the expanding blade forms an annular groove on the inner wall of the pile hole at the fixed height position; the power head is lifted independently, the hole forming head is lifted, and the expansion blade forms a vertical groove on the inner wall of the pile hole; the power head applies torque rotation and pulling force, and the expansion blade forms a thread groove on the inner wall of the pile hole. Above-mentioned process can effectual increase bored concrete pile body's external surface area, and then improves the frictional force between bored concrete pile and the stake hole, and then improves bored concrete pile's bearing capacity.

In an alternative aspect of the present invention, the expanding mechanism is an expanding protrusion disposed on a circumferential surface of the pull rod body, and a side of the expanding protrusion close to the housing is provided with a guiding inclined surface. In the drilling process, the expansion blade and the expansion bulge are arranged in the expansion blade groove from top to bottom, when the expansion blade is pulled, the expansion bulge moves upwards to push the expansion blade out of the expansion blade groove, the guide inclined plane enables the expansion bulge to smoothly enter a gap between the expansion blade and the pull rod body, and meanwhile, the expansion blade is slowly pushed out of the expansion blade groove.

In another optional scheme of the utility model, the expansion mechanism is a connecting rod, one end of the connecting rod is hinged with the lower end of the expansion blade, and the other end of the connecting rod is hinged with the pull rod body. When the expansion blade is pulled, the included angle between the connecting rod and the expansion blade is reduced, so that the expansion blade is pushed out of the expansion blade groove.

Preferably, the hinge point of the connecting rod and the expansion blade is positioned at the end part of the expansion blade close to the pull rod body. The expansion blade has certain width on the radial direction of casing, and the pin joint of expansion blade and connecting rod is located the one end that the expansion blade is close to the pull rod body, and above-mentioned setting can make the pin joint of expansion blade and connecting rod keep away from the stake hole inner wall, when the expansion blade is at the ruling stake hole inner wall, reduces the chance that the pin joint contacted soil, and then keeps the articulated function of pin joint.

Specifically, the limiting mechanism for the pull rod body to move downwards relative to the shell is of a step structure on the peripheral surface of the pull rod body, the diameter of the upper part of the pull rod body is larger than that of the lower part of the pull rod body, so that the step structure is formed, and a step hole matched with the pull rod body is formed in the shell, so that the pull rod body is limited to move downwards relative to the shell; the limiting mechanism of the pull rod body moving upwards relative to the shell is a lock cap between the shell and the pull rod body, the upper end of the pull rod body is of a conical structure with a narrow upper part and a wide lower part, the lock cap is of a cylindrical structure, the outer side of the lock cap is fixedly connected with the inner side of the shell, and the inner side of the lock cap is provided with a conical hole matched with the upper end of the pull rod body.

Preferably, the number of the expansion blade grooves is 6, and the expansion blade grooves are uniformly distributed in the circumferential direction of the housing.

The hole forming head is of a hollow tubular structure, the inner cavity of the hole forming head is connected with a concrete grouting device, and concrete enters the hole forming head from the grouting device and enters the pile hole, so that the pouring is completed.

The utility model has the advantages and positive effects that: the inner wall of the pile hole formed by adopting the technical scheme is compact, the surface area of the pile formed after the pile hole is poured is large, the friction force between the pile and the pile hole is large, and the bearing capacity of the pile can be effectively improved.

Drawings

FIG. 1 is a schematic view of the structural principle of the present invention

FIG. 2 is a schematic view of the structure of a pore-forming head in example 1

FIG. 3 is a cross-sectional view taken at B in FIG. 2

FIG. 4 is a cross-sectional view taken at A in FIG. 2 when the expansion blades are retracted in the expansion blade slots

FIG. 5 is a cross-sectional view taken at A in FIG. 2 when the expansion blades are pushed out of the expansion blade slots

FIG. 6 is a schematic view of the expanding mechanism of example 2

FIG. 7 is a schematic view of the expansion blade pushed out of the expansion blade groove by the expansion mechanism in example 2

In the figure:

1. power head 2, drill rod 3 and pore-forming head

4. Drill bit 5, slip casting device 31 and helical blade

32. Pressing blade 33, support rib 34, and tie bar body

35. Housing 36, expansion blade 37, lock cap

341. Expansion bulge 342 and connecting rod

Detailed Description

Example 1

As shown in fig. 1-5, the present invention:

the utility model provides a crowded native device of formula that expands is carried in crowded drawing of side, includes unit head 1, drilling rod 2, pore-forming head 3 and drill bit 4, and the both ends of drilling rod 2 link to each other with unit head 1 and pore-forming head 3 respectively, and unit head 1 drive drilling rod 2 drives pore-forming head 3 and rotates, and drill bit 4 and pore-forming head 3 keep away from the fixed linking to each other of one end of drilling rod 2, the tip periphery that pore-forming head 3 is close to drill bit 4 is equipped with helical blade 31, helical blade 31's upside is equipped with 2 cylindrical surface's extrusion blade 32, and extrusion blade 32's straight generating line is parallel with pore-forming head 3's axis, and the one end of extrusion blade 32's guideline coincides with pore-forming head 3 global, and extrusion blade 32's medial surface and pore-forming head 3 are equipped with between global and support rib 33.

The axis that extrusion blade 32 coiled into the pore-forming head 3 rotates and forms virtual cylinder, and the one end of extrusion blade 32 alignment coincides with pore-forming head 3 global, and the other end of extrusion blade 32 coincides with virtual cylinder global, and virtual cylinder's diameter is greater than pore-forming head 3's diameter.

The drilling head 3 sequentially comprises a drill bit core pipe section and an expansion section from bottom to top, the helical blade 31 and the extrusion blade 32 are arranged in the drill bit core pipe section, the expansion section comprises a tubular shell 35 and a pull rod body 34 arranged in the shell, the drill bit core pipe section is fixedly connected with the shell 35, the pull rod body 34 and the shell 35 are in sliding connection in the axial direction of the shell, an expansion blade groove is formed in the end part, close to the drill bit core pipe section, of the shell 35, the expansion blade groove is internally provided with an expansion blade 36, the upper end of the expansion blade 36 is hinged to the wall of the expansion blade groove, an expansion protrusion 341 on the peripheral surface of the pull rod body 34 is provided, and a guide inclined surface is arranged on one side, close to the shell 35, of the expansion protrusion 341.

Specifically, the expanding section includes a locking cap 37 for sliding the locking housing 35 and the pull rod body 34 relative to each other.

Specifically, the number of the expansion blade grooves is 6, and the expansion blade grooves are uniformly distributed in the circumferential direction of the housing 35.

The pore-forming head 3 is of a hollow tubular structure, and the inner cavity of the pore-forming head 3 is connected with the concrete grouting device 5.

The working process of the example is as follows:

during drilling construction, the power head 1 applies torque and downward pressure to the drill rod 2, the drill rod 2 transmits the torque to the pull rod body 34, the torque and the downward pressure are transmitted to the shell 35 through a limiting mechanism and a key between the pull rod body 34 and the shell 35, and then the torque and the downward pressure are transmitted to a drill core pipe section and a drill bit 4, so that drilling construction is carried out. In the drilling process, the expansion blade 36 is retracted in the expansion blade groove, when the drilling depth meets the requirement, the power head 1, the drill rod 2 and the pull rod body 34 start to be lifted, the pull rod body 34 slides relative to the shell 35, the lower end of the expansion blade 36 is pushed out of the expansion blade groove by the expansion mechanism, and after the expansion blade 36 extends out of a specific height, the pull rod body 34 and the shell 35 are limited by the limiting mechanism between the two to continuously slide relatively, so that the pull rod body 34 transmits the lifting force to the shell 35.

At the moment, the power head applies torque independently, the pore-forming head 3 rotates, and the expansion blade 36 forms an annular groove on the inner wall of the pile hole; the power head 1 independently applies lifting force, the pore-forming head 3 rises, and the expansion blade 36 forms a vertical groove on the inner wall of the pile hole; the power head 1 applies torque to rotate and also applies lifting force to lift, and the expansion blade 36 forms a thread groove on the inner wall of the pile hole.

Example 2

As shown in fig. 6 to 7, in the embodiment 2, the expanding mechanism is a link 342, one end of the link is hinged to the lower end of the expanding blade 36, and the other end of the link 342 is hinged to the pull rod body 34.

Specifically, the hinge point of the connecting rod 342 and the expansion blade 36 is located at the end of the expansion blade 36 close to the pull rod body 34. The rest of the setup of example 2 is the same as example 1.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the utility model. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. The utility model provides a crowded native device of formula that expands is carried in side extrusion, includes unit head, drilling rod, pore-forming head and drill bit, and the both ends of drilling rod link to each other with unit head and pore-forming head respectively, and unit head drive drilling rod drives the pore-forming head and rotates, and drill bit and pore-forming head keep away from the one end fixed linking to each other of drilling rod, its characterized in that: the drilling head is provided with a drill bit, the drilling head is provided with a straight line, the drill bit is provided with a straight line, the drilling head is provided with a straight line, the straight line is parallel to the straight line, the straight line is coincident with the circumferential surface of the drilling head, and a supporting rib is arranged between the inner side surface of the straight line and the circumferential surface of the drilling head.

2. The side-crowd and lift-ream earth-crowd device of claim 1, where: the drilling head sequentially comprises a drill bit core pipe section and an expansion section from bottom to top, the spiral blade and the extrusion blade are arranged in the drill bit core pipe section, the expansion section comprises a tubular shell and a pull rod body arranged in the shell, the drill bit core pipe section is fixedly connected with the shell, the pull rod body is in sliding connection with the shell in the axial direction of the shell, an expansion blade groove is formed in the end portion, close to the drill bit core pipe section, of the shell, the expansion blade groove is internally provided with an expansion blade, the upper end of the expansion blade is hinged to the wall of the expansion blade groove, and an expansion mechanism for pushing one end, far away from a hinge point, of the expansion blade out of the expansion blade groove when the pull rod body slides upwards relative to the shell is arranged between the pull rod body and the shell.

3. The side-crowd and lift-ream earth-crowd device of claim 2, where: the expansion mechanism is an expansion bulge arranged on the peripheral surface of the pull rod body, and one side of the expansion bulge, which is close to the shell, is provided with a guide inclined plane.

4. The side-crowd and lift-ream earth-crowd device of claim 2, where: the expansion mechanism is a connecting rod, one end of the connecting rod is hinged with the lower end of the expansion blade, and the other end of the connecting rod is hinged with the pull rod body.

5. The side-crowd and lift-ream earth-crowd device of claim 4, where: and the hinged point of the connecting rod and the expansion blade is positioned at the end part of the expansion blade close to the pull rod body.

6. The side-crowd and lift-ream earth-crowd device of claim 2, where: the expansion section comprises a locking cap which enables the locking shell and the pull rod body to slide relatively.

7. The side-crowd and lift-ream earth-crowd device of claim 2, where: the number of the expansion blade grooves is not less than 2, and the expansion blade grooves are uniformly distributed in the circumferential direction of the shell.

8. The side-crowd and lift-ream earth-crowd device of claim 1, where: the pore-forming head is of a hollow tubular structure, and the inner cavity of the pore-forming head is connected with the concrete grouting device.

9. The side-crowd and lift-ream earth-crowd device of claim 1, where: the axis of the extrusion blade wound into the hole head rotates to form a virtual cylinder, one end of the alignment line of the extrusion blade coincides with the circumferential surface of the hole head, the other end of the extrusion blade coincides with the circumferential surface of the virtual cylinder, and the diameter of the virtual cylinder is larger than that of the hole head.