A flexible energy pile construction equipment based on cement-soil mixing pile

Abstract

The application provides a flexible energy pile construction equipment based on cement soil mixing pile and belongs to the technical field of ground source heat pumps, which comprises a drill rod and a drill bit, the drill bit is hingedly connected to the bottom end of the drill rod on the right side, and the drill bit is detachably connected to the bottom end of the drill rod on the left side; the drill rod is hollow, a sleeve pipe is slidably connected in the drill rod, an inner rod is slidably connected in the sleeve pipe, and a sleeve pipe arm is hingedly connected to the bottom of the sleeve pipe; a limiting groove matched with a heat exchange pipe is arranged on the side wall of the sleeve pipe, and a roller is rotatably connected to the end of the sleeve pipe arm; a connecting rod is connected between the sleeve pipe and the sleeve pipe arm, the connecting rod is hingedly connected with a lifting rod, and the lifting rod is sleeved in the drill rod; the drill rod and the sleeve pipe are provided with matched limiting devices to prevent the sleeve pipe from rotating in the drill rod; the equipment arranges the heat exchange pipe while mixing the cement soil, has high manufacturing efficiency, does not need to provide additional support for the heat exchange pipe, can improve the construction efficiency, and can save the cost.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ground source heat pumps, and particularly relates to a flexible energy pile construction equipment based on cement-soil mixing piles. BACKGROUND

[0002] As a renewable clean energy, shallow geothermal energy has the characteristics of wide geographical distribution, large reserves and no pollution. Energy piles embed heat exchange pipes in pile foundations to extract shallow geothermal energy through fluid circulation in the heat exchange pipes. Energy piles do not need to drill holes and do not occupy additional underground space resources, and are a new technology for efficient and economical utilization of shallow geothermal energy. At present, most of the energy piles applied are based on rigid piles such as cast-in-place piles and precast concrete piles, and generally the heat exchange pipes are bundled on the reinforcement cage and poured inside the pile body or pre-embedded in the precast concrete pile.

[0003] Cement-soil mixing piles are widely used in the construction and transportation industries and are a widely used soft soil foundation treatment method. If the energy pile technology is implemented based on cement-soil mixing piles, the application range of energy piles can be greatly improved and the utilization rate of shallow geothermal energy can be improved. At present, there is still a lack of corresponding construction methods for installing heat exchange pipes based on cement-soil mixing piles to form flexible energy piles.

[0004] Chinese invention patent with publication number CN105350522B discloses a manufacturing and using method of a precast reinforced concrete energy pile system. The energy pile system includes a precast reinforced concrete pipe pile, a heat exchanger device and a water tank. The method is to first drive the precast reinforced concrete pipe pile into the foundation, then to wrap the conduit in a spiral shape on the PVC pipe to form a pile core, and to insert the pile core into the hollow concrete pile. The two ends of the conduit on the pile core protrude out of the pile body, one end serves as a water inlet connected to the water tank through the conduit, and the other end serves as a water outlet connected to the water inlet of the next pile. When in use, water enters the conduit from the water tank and circulates in the pile group, thereby transferring the temperature of the underground constant temperature layer to the upper structure and fully utilizing the geothermal resources to make the upper structure achieve the effect of "warm in winter and cool in summer". This device has simple materials, convenient installation, easy control, energy saving and wide application prospect.

[0005] The manufacturing method of the above-mentioned energy pile is to use a precast rigid energy pile. This method has complex construction procedures, needs to first drive the precast reinforced concrete pipe pile into the foundation, and then to wrap the heat exchange pipe in a spiral shape on the PVC pipe to form a pile core. The pile core is inserted into the hollow concrete pile. The procedure is complicated, and additional processing and construction procedures are needed outside the reinforced concrete. The total production time is long and the cost is high. SUMMARY

[0006] The application aims to solve the problems mentioned in the background art, and provides a flexible energy pile construction equipment based on cement soil mixing pile, which arranges heat exchange pipes while mixing cement soil, has high production efficiency, does not need to provide additional support for the heat exchange pipes, can improve construction efficiency, and can save cost.

[0007] To achieve the above technical purposes, the technical scheme adopted by the application is:

[0008] A flexible energy pile construction equipment based on cement soil mixing pile, comprising a drill rod and a drill bit, the drill bit is hingedly connected to the bottom end of the drill rod on the right side, and the drill bit is detachably connected to the bottom end of the drill rod on the left side; the drill rod is hollow inside, a sleeve is slidably connected inside the drill rod, an inner rod is slidably connected inside the sleeve, and a sleeve arm is hingedly connected to the bottom of the sleeve; a limiting groove matched with the heat exchange pipe is arranged on the side wall of the sleeve, and a roller is rotatably connected to the end of the sleeve arm; a connecting rod is connected between the sleeve and the sleeve arm, the connecting rod is hingedly connected with a lifting rod, and the lifting rod is sleeved in the drill rod; the drill rod and the sleeve are provided with matched limiting devices to prevent the sleeve from rotating in the drill rod.

[0009] Preferably, the limiting device is a circular ring arranged inside the drill rod and a plurality of protruding columns arranged outside the sleeve, and the top of the circular ring is provided with a groove matched with the protruding columns.

[0010] Preferably, the left side of the drill bit is provided with a first limiting block protruding upward, the outer wall of the drill rod is provided with a second limiting block matched with the first limiting block, a limiting rod is hingedly connected to the top of the drill rod, the bottom end of the limiting rod is provided with a through groove, the bottom end of the through groove is hingedly connected with a latch, and the two limiting blocks are provided with through holes matched with the latch; when the latch is completely inserted into the through holes of the two limiting blocks, the bottom of the latch is in contact with the inner wall of the bottom of the through groove; the two limiting blocks are located on the right side of the limiting rod; the top of the drill rod is provided with a limiting plate, the limiting rod is bolted to the limiting plate, and the limiting plate is located below the hinged point of the limiting rod and the drill rod and on the right side of the limiting rod.

[0011] Preferably, the surface of the roller is provided with a plurality of protruding stripes, and the outer wall of the heat exchange pipe is provided with a groove matched with the protruding stripes on the surface of the roller.

[0012] Preferably, the bottom end of the inner rod is provided with a circular base, and the bottom of the circular base is provided with a groove matched with the heat exchange pipe.

[0013] Preferably, the sleeve arm comprises two side plates and a roller, the front ends of the two side plates are hingedly connected to the sleeve, the roller is rotatably connected between the ends of the two side plates, and the distance between the two side plates is greater than the diameter of the circular base.

[0014] Preferably, one side of the bottom end of the sleeve is provided with a fixed pulley, the fixed pulley is located below the limiting groove of the side wall of the sleeve, and the fixed pulley is located between the two side plates of the sleeve arm; the expansion direction of the sleeve arm is on the same side as the fixed pulley.

[0015] Preferably, a plurality of positioning columns are symmetrically arranged on both sides of the outer wall of the sleeve, and the ends of the positioning columns are provided with limiting grooves.

[0016] Preferably, a plurality of blades are arranged on the outer side of the drill rod.

[0017] Preferably, the lifting rods and the connecting rods are both two, symmetrically arranged on the front and rear sides of the sleeve, a cross rod is connected between the top portions of the two lifting rods, the top portion of the drill rod is provided with a supporting seat, and the supporting seat is provided with a groove matched with the cross rod.

[0018] The present application has the following beneficial effects:

[0019] By additionally arranging the sleeve and the inner rod in the stirring rod of the cement-soil mixing pile, and arranging the drill bit in a separable connection mode with the drill rod, when the cement mixing pile is completed and the drill bit approaches the cement bottom, the drill bit is separated, the sleeve and the inner rod are extended, the inner rod is fixed in position, then the sleeve arm is unfolded, the sleeve is rotated upward with the drill rod, so as to drive the heat exchange pipe to be arranged in a spiral shape in the cement, when the drill rod is completely separated from the cement, the heat exchange pipe is also arranged in the cement, and after the cement is solidified, the energy pile can be arranged at the specified position, the device only needs to be simply modified on the stirring machine of the conventional cement-soil mixing pile, and the cement mixing and the arrangement of the heat exchange pipe can be completed at the same time, the production of the energy pile is completed, the working efficiency is high, the heat exchange pipe does not need an additional support, the construction process is saved, and the construction cost is reduced; and the device can directly use the construction machine of the cement mixing pile for construction and production, without the need of additionally arranging a special driving device, so that the production and construction cost is further saved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall structure schematic view of the device when the heat exchange pipe is arranged;

[0021] Figure 2 is the left view of the device when the heat exchange pipe is not arranged;

[0022] Figure 3 is the partial view of the bottom of the limiting rod;

[0023] Figure 4 is the installation plan view of the sleeve arm;

[0024] Figure 5 is the connection schematic view of the sleeve, the inner rod, the sleeve wall and the heat exchange pipe;

[0025] Figure 6 is Figure 1 is the sectional view of the drill rod along the A-A direction in the middle;

[0026] Figure 7 is the structure schematic view of the positioning column and the limiting groove;

[0027] Figure 8is a structural schematic view of the support seat;

[0028] Figure 9 is Figure 2 is a local enlarged schematic view at B in the middle.

[0029] The names marked in the figure are:

[0030] 1, drill rod, 2, drill bit, 3, heat exchange pipe, 4, blade, 5, positioning column, 6, lifting rod, 7, inner rod, 8, sleeve, 9, sleeve arm, 10, roller, 11, protruding column, 12, circular ring, 13, limiting groove, 14, fixed pulley, 15, sliding bar, 16, connecting rod, 17, circular base, 18, support seat, 19, first limiting block, 20, second limiting block, 21, limiting rod, 22, bolt, 23, through slot, 24, limiting plate. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0032] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back" and the like cited in the present application are only for the convenience of clear description, and are not intended to limit the scope of the present application. Changes or adjustments of the relative relationship without substantial changes in the technical content are also considered as the scope of the present application.

[0033] As Figures 1-9 shown, the present application provides a flexible energy pile construction equipment based on cement soil mixing pile, which comprises a drill rod 1 and a drill bit 2, the drill bit 2 is hingedly connected at the bottom end of the drill rod 1, and the drill bit 2 is detachably connected at the bottom end of the drill rod 1, and the drill bit 2 is detachably connected at the bottom end of the drill rod 1 through the following way:

[0034] As Figure 2 and 9 shown (the internal structure of the drill rod 1 and the blade 4 and other redundant parts are omitted), the left side of the drill bit 2 is provided with a first limiting block 19 protruding upward, the outer wall of the drill rod 1 is provided with a second limiting block 20 matched therewith, and the first limiting block 19 is located at the left side of the second limiting block 20; the top of the drill rod 1 is hingedly connected with a limiting rod 21.

[0035] As Figure 3 shown, the bottom end of the limiting rod 21 is provided with a through slot 23, the bottom end of the through slot is hingedly connected with a bolt 22, the two limiting blocks are provided with through holes matched with the bolt 22, and when the bolt 22 is inserted into the through holes of the two limiting blocks, the connection of the drill bit 2 and the drill rod 1 is completed. At this time, the limiting rod 21 also needs to be bolted with a limiting plate 24 (which will be described below) to prevent the limiting rod 21 from deflecting during the rotation of the drill rod 1, causing the drill bit 2 to separate from the drill rod 1.

[0036] When the plug 22 is fully inserted into the through holes of the two limiting blocks, the bottom of the plug 22 is in contact with the inner wall of the bottom of the through slot 23, that is, the maximum deflection of the end of the plug 22 downward is the angle when the plug 22 is fully inserted into the through holes of the two limiting blocks (in this embodiment, at this time, the axis of the plug 22 is in a horizontal state and perpendicular to the axis of the limiting rod 22), and it cannot continue to deflect downward, so that the deflection freedom of the plug 22 is too large, and the two limiting blocks are shaken to make the plug 22 slip out of the through holes during the rotation of the drill rod 1; of course, the thickness of the two limiting blocks can also be increased, thereby increasing the length of the through holes, and the length of the plug 22 is also lengthened, so that the plug 22 can fully penetrate through the two through holes, and the separation of the drill bit 2 and the drill rod 1 caused by the plug 22 slipping out can also be avoided.

[0037] The two limiting blocks are located on the right side of the limiting rod 21; the top of the drill rod 1 is provided with a limiting plate 24, and the limiting rod 21 is bolted on the limiting plate 24 (when it is necessary to separate the drill bit 2 and the drill rod 1, the limiting rod 21 is separated from the limiting plate 24, so that the limiting rod 21 can rotate), and the limiting plate 24 is located below the hinge point of the limiting rod 21 and the drill rod 1 and on the right side of the limiting rod 21, so that when it is necessary to separate the drill bit 2 and the drill rod 1, the limiting rod 21 can rotate clockwise in the direction, so that the plug 22 is separated from the through holes of the two limiting blocks, and the drill bit 2 and the drill rod 1 can be separated; of course, the two limiting blocks and the limiting plate 24 can also be arranged on the left side of the limiting rod 21, or in other ways, as long as the limiting rod 21 can normally rotate and the plug 22 can be separated from the through holes. Figure 2

[0038] The drill rod 1 is hollow, that is, the drill rod 1 is provided with an axial through hole, and the inner slide of the drill rod 1 (the through hole) is connected with a sleeve 8, the inner slide of the sleeve 8 is connected with an inner rod 7, the bottom of the sleeve 8 is hingedly connected with a sleeve arm 9, and the lengths of the sleeve 8 and the inner rod 7 (especially the length of the inner rod 7) are preferably greater than the length of the drill rod 1, so that the inner rod 7 and the sleeve 8 can be pressed later, and the sleeve arm 9 and the inner rod 7 can be stretched out from the bottom of the drill rod 1.

[0039] As shown in Figure 4 and 5 , the sleeve arm 9 comprises two side plates and a roller 10, the front ends of the two side plates are hingedly connected to the sleeve 8, the roller 10 is rotatably connected between the ends of the two side plates, and the distance between the two side plates is greater than the diameter of the circular base 17 (or the diameter of the circular base 17 is less than the distance between the two side plates, so that the circular base 17 will not jam the sleeve arm 9 and affect the rotation of the sleeve arm 9); a plurality of convex stripes are arranged on the surface of the roller 10, and a plurality of grooves matching the convex stripes on the surface of the roller 10 are arranged on the outer wall of the heat exchange pipe 3; the stripes on the surface of the roller 10 and the grooves on the outer wall of the heat exchange pipe 3 are meshed with each other, which can prevent the heat exchange pipe 3 from slipping on the surface of the roller 10 and slipping off.

[0040] ​The connecting rod 16 is hinged with the sleeve 8 and the sleeve arm 9, and the two ends of the connecting rod 16 are respectively hinged with the sleeve 8 and the sleeve arm 9; the connecting rod 16 is hinged with the lifting rod 6, the lifting rod 6 is sleeved in the through hole of the drill rod 1, and the lifting rod 6 is attached to the outer wall of the sleeve arm 8;

[0041] In the embodiment, the lifting rod 6 and the connecting rod 16 are both provided with two (only one can be provided, for example, only one lifting rod 6 and connecting rod 16 are provided on the front side of the sleeve 8), and are symmetrically arranged on the front and rear sides of the sleeve 8; the two lifting rods 6 are connected with a horizontal rod at the top, and the two lifting rods 6 and the horizontal rod are equivalent to a combined U-shaped frame; the top of the drill rod 1 is provided with a supporting seat 18, and the supporting seat 18 is provided with a groove matched with the horizontal rod; when the sleeve arm 9 needs to be unfolded, the lifting rod 6 is pulled, and then the connecting rod 16 is driven to rotate, so that the sleeve arm 9 rotates to be unfolded; when the horizontal rod is clamped in the groove of the supporting seat 18, the sleeve arm 9 is just unfolded to a set angle (in the embodiment, the set angle is that the sleeve arm 9 is in a horizontal state); after the horizontal rod is clamped, the sleeve arm 9 can always keep in a horizontal state in the process of rotating and rising.

[0042] As shown in Figure 5 and 7 , the side wall of the sleeve 8 is provided with a limiting groove 13 matched with the heat exchange pipe 3; a plurality of positioning columns 5 are symmetrically arranged on the two sides of the outer wall of the sleeve 8, and the ends of the positioning columns 5 are provided with limiting grooves 13; the bottom end of the inner rod 7 is provided with a circular base 17, and the bottom of the circular base 17 is provided with a groove matched with the heat exchange pipe 3, so that the heat exchange pipe 3 can be better limited on the circular base 17, especially when the heat exchange pipe 3 is arranged, the inner rod 7 needs to be pressed down, and the heat exchange pipe 3 is temporarily fixed on the pile bottom together; the bottom of the circular base 17 is provided with the groove, so that the above process can be better realized, and after the arrangement is completed, the inner rod 7 can be lifted, and the heat exchange pipe 3 will not be bonded on the circular base 17 (it will not be limited in the groove like the limiting groove 13, and it is not easy to be separated without external force).

[0043] The above-mentioned limiting groove 13 is equivalent to a clamp with an opening, the inner diameter of the limiting groove 13 is slightly larger than the outer diameter of the heat exchange pipe 3, and the opening of the limiting groove 13 is smaller than the outer diameter of the heat exchange pipe 3, so that the heat exchange pipe 3 can be clamped into the limiting groove 13 and can slide therein, but cannot easily slide out of the opening.

[0044] As shown in Figure 8 , preferably, a sealing device can be additionally arranged on the groove of the supporting seat 18; when the horizontal rod enters the groove, the sealing device is used to limit the horizontal rod in the groove and cannot move up and down; the sealing device can be slidably connected with a sliding bar 15 in the groove (a corresponding sliding groove is arranged on the side wall of the groove); the sliding bar 15 can be taken out and inserted into the groove when needed.

[0045] As shown in Figure 6As shown, the drill rod 1 and the sleeve 8 are provided with matched limiting devices to prevent the sleeve 8 from rotating in the drill rod 1; the limiting devices are a circular ring 12 arranged inside the drill rod 1 and a plurality of protruding columns 11 arranged outside the sleeve 8, and the top of the circular ring 12 is provided with grooves matched with the protruding columns 11; the through hole in the middle of the circular ring 12 can normally pass the sleeve 8, the sleeve arm 9, the lifting rod 6 and the connecting rod 16.

[0046] The circular ring 12 can be arranged at the top or the bottom of the drill rod 1, and the corresponding protruding columns 11 can be arranged at the top or the bottom of the sleeve 8, but preferably both are arranged at the bottom, so that too much cement can be prevented from entering the inside of the drill rod 1, and the difficulty of cleaning in the later stage is increased; after the protruding columns 11 are clamped in the corresponding grooves of the circular ring 12, the sleeve 8 cannot continue to move downward and cannot rotate, so that the position is kept relatively fixed, so that the drill rod 1 can also drive the sleeve 8 and the sleeve arm 9 to rotate and move upward in the process of rotating upward, thereby completing the arrangement of the heat exchange pipe 3.

[0047] The bottom end of the right side of the sleeve 8 is provided with a fixed pulley 14, the fixed pulley 14 is located below the limiting groove 13 in the side wall of the sleeve 8, the fixed pulley 14 is located between the two side plates of the sleeve arm 9, and the expansion direction of the sleeve arm 9 is on the same side of the fixed pulley 14, that is, the sleeve arm 9 also expands to the right side of the sleeve 8; the heat exchange pipe 3 passes through the limiting grooves 13 on the left side of the sleeve 8 and the limiting grooves 13 at the bottom of the circular base 17 in turn, is wound on the roller 10, then passes through between the sleeve 8 and the fixed pulley 14, and then passes through the limiting grooves 13 on the right side of the sleeve 8, extends into the inside of the drill rod 1 and is connected to the pipe winding disc, and the pipe winding disc continuously releases the heat exchange pipe 3 in the subsequent arrangement process; it should be noted that the fixed pulley 14 is arranged, and the circular ring 12 needs to be provided with a corresponding through slot for the fixed pulley 14 to pass through.

[0048] The fixed pulley 14 is arranged to enable the heat exchange pipe 3 on the right side of the sleeve 8 to better adhere to the right side wall of the sleeve 8, so as to avoid that the heat exchange pipe 3 is too far away from the side wall of the sleeve 8 and has a large opening angle, and the heat exchange pipe 3 is too large. The resistance to cement in the process of rotating upward of the drill rod 1 is too large, so that the heat exchange pipe 3 is separated from the roller 10.

[0049] The outside of the drill rod 1 is provided with a plurality of blades 4 for stirring cement soil.

[0050] The working principle (use method) of the flexible energy pile construction equipment based on the cement soil mixing pile provided by the application is as follows, including the following steps:

[0051] S1: the heat exchange pipe installation system is in place; after the cement-soil mixing pile construction is completed, the cement has not yet solidified, the slurry pump is closed, the inner rod 7 and the sleeve pipe 8 are installed in the drill pipe 1 (or can be installed in the drill pipe 1 at the beginning), the drill bit 2 is lowered to a position 50-100 cm away from the pile bottom while stirring; the limiting rod 21 is separated from the limiting plate 24, and the limiting rod 21 is rotated to make the bolt 22 disengage from the through holes of the first limiting block 19 and the second limiting block 20, and then the drill bit 2 and the drill pipe 1 are separated; the inner rod 7 and the sleeve pipe 8 are pressed down, the drill bit 2 is opened (pushed open), and the inner rod 7 sinks into the pile bottom together with the sleeve pipe 8.

[0052] S2: pressure is applied to the top end of the inner rod 7, and the inner rod 7 is pressed into the pile bottom together with the heat exchange pipe 3 and fixed.

[0053] S3: the sleeve pipe 8 is connected with the drill pipe 1 through the limiting device to form a relatively fixed connection, and can rotate and lift with the drill pipe 1; the lifting rod 6 is pulled to rotate the connecting rod 16, drive the sleeve pipe arm 9 to expand to a horizontal state, put the cross rod in the groove of the support seat 18, and install the sliding strip 15, lock the cross rod to prevent it from moving in the groove, so that the sleeve pipe arm 9 can always maintain a horizontal state during the rotation and upward movement of the drill pipe 1.

[0054] S4: the roller 10 at the top end of the sleeve pipe arm 9 is started at the same time as the drill pipe 1, the drill pipe 1 drives the sleeve pipe 8 to slowly stir and rise, and the roller 10 rotates to release the heat exchange pipe 3.

[0055] S5: the sleeve pipe arm 9 slowly rises to the pile top while stirring, and the outer pipe winding disc continuously releases the heat exchange pipe 3 during the rotation of the machine, and finally the heat exchange pipe 3 forms a spiral shape inside the pile body to form a spiral flexible energy pile.

[0056] S6: the inner rod 7 is pulled out after the energy pile construction is completed.

[0057] The above is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that some improvements and decorations without departing from the principles of the present application shall be considered as the protection scope of the present application.

Claims

1. A flexible energy pile construction equipment based on cement-soil mixing pile, comprising a drill pipe (1) and a drill bit (2), characterized in that: The drill bit (2) is hingedly connected to the bottom end of the drill rod (1) on the right side, and is detachably connected to the bottom end of the drill rod (1) on the left side; the drill rod (1) is hollow inside, and the drill rod (1) is slidably connected with a sleeve pipe (8) inside, the sleeve pipe (8) is slidably connected with an inner rod (7) inside, the bottom end of the inner rod (7) is provided with a circular base (17), the bottom of the circular base (17) is provided with a groove matched with the heat exchange pipe (3), and the bottom of the sleeve pipe (8) is hingedly connected with a sleeve pipe arm (9); the side wall of the sleeve pipe (8) is provided with a limiting groove (13) matched with the heat exchange pipe (3), the distal end of the sleeve pipe arm (9) is rotatably connected with a roller (10), the surface of the roller (10) is provided with a plurality of convex stripes, and the outer wall of the heat exchange pipe (3) is provided with a groove matched with the convex stripes on the surface of the roller (10); the heat exchange pipe (3) passes through the limiting groove (13) on the left side of the sleeve pipe (8) and the groove at the bottom of the circular base (17) in sequence, is then wound on the roller (10), and then passes through the limiting groove (13) on the right side of the sleeve pipe (8) and is connected to a pipe winding disc extending out of the drill rod (1) inside; the sleeve pipe (8) and the sleeve pipe arm (9) are connected with a connecting rod (16), the connecting rod (16) is hingedly connected with a lifting rod (6), and the lifting rod (6) is sleeved in the drill rod (1); the drill rod (1) and the sleeve pipe (8) are provided with matched limiting devices to prevent the sleeve pipe (8) from rotating in the drill rod (1).

2. The flexible energy pile construction equipment based on cement-soil mixing pile according to claim 1, characterized in that: The limiting device is a circular ring (12) arranged inside the drill rod (1) and a plurality of convex columns (11) arranged outside the sleeve pipe (8), and the top of the circular ring (12) is provided with a groove matched with the convex columns (11).

3. The flexible energy pile construction equipment based on cement-soil mixing piles according to claim 1, characterized in that: The left side of the drill bit (2) is provided with a first limiting block (19) protruding upward, the outer side wall of the drill rod (1) is provided with a second limiting block (20) matched with the first limiting block (19), the top of the drill rod (1) is hingedly connected with a limiting rod (21), the bottom end of the limiting rod (21) is provided with a through groove (23), the bottom end of the through groove is hingedly connected with a bolt (22), and the two limiting blocks are provided with through holes matched with the bolt (22); when the bolt (22) is completely inserted into the through holes of the two limiting blocks, the bottom of the bolt (22) is in abutting contact with the inner wall of the bottom of the through groove (23); the two limiting blocks are located on the right side of the limiting rod (21); the top of the drill rod (1) is provided with a limiting plate (24), the limiting rod (21) is bolted to the limiting plate (24), and the limiting plate (24) is located below the hinged point of the limiting rod (21) and the drill rod (1) and on the right side of the limiting rod (21).

4. The flexible energy pile construction equipment based on cement-soil mixing pile according to claim 1, characterized in that: The sleeve pipe arm (9) comprises two side plates and a roller (10), the front ends of the two side plates are hingedly connected to the sleeve pipe (8), the roller (10) is rotatably connected between the distal ends of the two side plates, and the distance between the two side plates is greater than the diameter of the circular base (17).

5. The flexible energy pile construction equipment based on cement-soil mixing pile according to claim 4, characterized in that: The bottom end of the sleeve pipe (8) is provided with a fixed pulley (14) on one side, the fixed pulley (14) is located below the limiting groove (13) of the side wall of the sleeve pipe (8), and the fixed pulley (14) is located between the two side plates of the sleeve pipe arm (9); the extension direction of the sleeve pipe arm (9) is on the same side as the fixed pulley (14).

6. The flexible energy pile construction equipment based on cement-soil mixing pile according to claim 1, characterized in that: A plurality of positioning columns (5) are symmetrically arranged on the outer side wall of the sleeve pipe (8), and the distal end of each positioning column (5) is provided with a limiting groove (13).

7. The flexible energy pile construction equipment based on cement-soil mixing pile according to claim 1, characterized in that: A plurality of blades (4) are arranged on the outer side of the drill rod (1). 8.The flexible energy pile construction equipment based on cement-soil mixing pile according to claim 1, characterized in that: The lifting rods (6) and connecting rods (16) are both two, symmetrically arranged on the front and back sides of the sleeve (8), two lifting rods (6) top are connected with a cross bar, the drill rod (1) top is equipped with a support seat (18), the support seat (18) is equipped with a groove matched with the cross bar.

Images