Anti-deviation positioning structure for mixing pile

Abstract

The utility model discloses an anti-deviation positioning structure for a stirring pile, and belongs to the field of stirring pile planting, the anti-deviation positioning structure comprises a main body, a positioning assembly, a calibration assembly and a fixing assembly, and an opening for a core pile to penetrate through is formed in the main body; the positioning assembly is mounted on the main body and used for limiting the position of the core pile; the calibration assembly is mounted on the main body and used for calibrating the position of the main body; the fixing assembly is installed on the body close to the outer side and used for limiting the position of the body. Wherein the calibration assembly comprises a plurality of groups of calibration pieces, and the plurality of groups of calibration pieces are annularly distributed on the main body and are used for calibrating the position of the main body, so that the center line of the calibration main body and the center line of the pile planting opening are collinear; according to the technical key points, the calibration assembly is arranged, and during use, whether the center line of the calibration body and the center line of the pile planting opening are collinear or not can be judged through the calibration assembly, so that whether use of the anti-deviation positioning structure is effective or not is judged, a foundation is laid for accurate guiding of the anti-deviation positioning structure, and good use prospects are achieved.

Description

Technical Field

[0001] The utility model belongs to the field of mixing piles, in particular to an anti-deviation positioning structure for mixing piles. Background Art

[0002] Cement mixing piles refer to an effective form of soft foundation treatment. It uses cement as the main agent of curing agent. A mixing pile machine is used to spray cement into the soil and fully mix it, so that a series of physical and chemical reactions occur between the cement and the soil, hardening the soft soil and improving the foundation strength.

[0003] In order to ensure the stability of the pile body, some people will insert a core pile into the cement-soil mixing pile before it begins to set so that they can bear the force together. However, it is difficult to accurately locate the center point of the core pile when implanting it, and it is easy to deviate during pile planting, resulting in uneven force on the pile body. For this reason, people have invented a locator for pile planting.

[0004] The existing patent number is CN219637883U, and the name of the patent is a utility model patent for an anti-deviation positioning structure for mixing piles. It records that it includes a positioner and a positioning box, a main bevel gear is movably connected to the middle part of the positioning box, a screw is movably connected to the positioning box, a secondary bevel gear is arranged at the end of the screw, an adjusting nut is threadedly connected to the screw, and the bottom end of the adjusting nut is connected to the side plate through a connecting piece, and an abutment rod is movably clamped on the side wall of the positioner. This anti-deviation positioning structure for mixing piles allows multiple screws to rotate simultaneously through the meshing action of the main bevel gear and the secondary bevel gear, so that the side plates always maintain a circular arrangement. First, the side plate is used to push the clamping arc plate to move, and the side plate drives the abutment rod to move at the same time until the abutment rod is adjusted to a suitable position. At this time, multiple abutment rods maintain a circular arrangement to position the pile body in the center, improve the coaxial accuracy, and simplify the positioning steps.

[0005] When the above-mentioned device is used, it only considers the synchronous adjustment of the upper clamping arc plate, but does not consider the accuracy of the position of the positioner itself. When the position of the positioner itself is inaccurate, the clamping arc plate adjustment is useless no matter how accurate it is. In addition, when the above-mentioned method is used for adjustment, the screw rod assembly will block the positioner mouth, affecting the insertion of the core pile. When the core pile is inserted, it is easy to collide with the screw rod assembly, which is easy to cause damage to the positioner, and does not meet people's use requirements.

[0006] In summary, the existing anti-deviation positioning structures for mixing piles have certain drawbacks when used and do not meet people's use requirements. Therefore, we propose an anti-deviation positioning structure for mixing piles. Summary of the invention

[0007] In order to overcome the shortcomings of the prior art, an embodiment of the present application provides an anti-drift positioning structure for a mixing pile, and a calibration component is provided. When in use, the calibration component can be used to determine whether the center line of the calibration body and the center line of the pile opening are collinear, thereby determining whether the use of the anti-drift positioning structure is effective, thereby laying the foundation for the alignment guidance of the anti-drift positioning structure, having good use effect and having good prospects for use.

[0008] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0009] An anti-deviation positioning structure for a mixing pile includes a main body, a positioning component, a calibration component and a fixing component:

[0010] An opening is provided inside the main body for the core pile to pass through;

[0011] The positioning assembly is mounted on the main body and is used to define the position of the core pile;

[0012] The calibration component is mounted on the main body and is used to calibrate the position of the main body;

[0013] The fixing assembly is installed on the main body near the outer side and is used to define the position of the main body;

[0014] The calibration assembly includes several groups of calibration parts, which are distributed in a ring shape on the main body and are used to calibrate the position of the main body so that the center line of the calibration main body is collinear with the center line of the stake opening.

[0015] When in use, the position of the main body is calibrated through the calibration component, and then the main body is fixed through the fixing component. Finally, the position of the positioning component is adjusted to limit the position of the core pile.

[0016] The utility model records an anti-drift positioning structure for a mixing pile, which is provided with a calibration component. When in use, the calibration component can be used to determine whether the center line of the calibration body and the center line of the pile opening are collinear, thereby determining whether the use of the anti-drift positioning structure is effective, thereby laying a foundation for the alignment guidance of the anti-drift positioning structure, having good use effect and having good use prospects.

[0017] Preferably, the calibration component includes a telescopic rod and a limit plate:

[0018] The main body of the telescopic rod is fixedly mounted on the outer surface of the main body near the lower end;

[0019] The main part of the telescopic rod is fixed by threads, and the telescopic rod can be directly rotated to be removed;

[0020] The limiting plate is located inside the opening, and the telescopic end of the telescopic rod passes through the main body and is fixedly connected to the limiting plate;

[0021] Wherein, a sensing component is installed on the limiting plate.

[0022] When in use, the telescopic rod can drive the limit plate to move so that the limit plate is located inside the stake opening. The telescopic rod is closed, and the spring contracts, so that the sensing part fits against the inner wall of the stake opening. At this time, the sensing part detects the contact force with the inner wall. Normally, the contact force is equal for the same springs, so the center line of the calibration body is collinear with the center line of the stake opening. When the force is unequal or the position of the body is obviously wrong, the spring can be removed for replacement.

[0023] Preferably, the telescopic rod adopts an electric push rod, a spring is installed between the limit plate and the inner surface of the main body, and the spring is sleeved on the telescopic rod.

[0024] Preferably, the sensing element is a pressure sensor, and the lower half of the limit plate extends to the inside of the stake opening. When the spring recovers its deformation, the pressure sensor fits against the inner wall of the stake opening.

[0025] Preferably, the positioning assembly includes an adjustment member and a telescopic column:

[0026] The adjusting member is arranged on the main body;

[0027] The number of telescopic columns is several groups, and the telescopic columns are installed on the inner wall of the opening;

[0028] Wherein, the telescopic end of the telescopic column is provided with a guide block for guiding the core pile to pass through.

[0029] When in use, the adjusting member can drive several groups of telescopic columns to move synchronously, thus achieving a precise guiding effect.

[0030] Preferably, the regulating member comprises an oil cylinder, a hydraulic pump and a fluid supply pipe:

[0031] The oil cylinder is fixedly installed on the main body;

[0032] The hydraulic pump is installed on the cylinder;

[0033] The liquid supply pipe is installed on the outer surface of the main body;

[0034] The hydraulic pump delivers the fluid in the oil cylinder to the inside of the fluid supply pipe.

[0035] When in use, the hydraulic pump draws the oil in the oil cylinder into the liquid supply pipe, thereby changing the telescopic length of the telescopic column, thereby changing the distance between the guide blocks, so that the guide blocks can play the role of guiding the core pile.

[0036] Preferably, the telescopic column is a hydraulic telescopic column, the main body of the hydraulic telescopic column is fixedly mounted on the inner wall of the opening, and the hydraulic telescopic column is connected to the liquid supply pipe through a pipeline.

[0037] The oil pressure inside the liquid supply pipe is constant, so the telescopic length of the hydraulic telescopic column is constant.

[0038] Preferably, a mounting opening is provided on the guide block away from the telescopic column, and a laser ranging sensor with a wireless function is arranged inside the mounting opening.

[0039] The laser distance sensor measures the distance between the guide block and the core pile, making the initial insertion position of the core pile more accurate, thereby improving the core pile insertion accuracy.

[0040] The utility model records an anti-deviation positioning structure for a mixing pile, which is provided with a positioning component. When in use, the length of multiple groups of telescopic columns can be adjusted by controlling the hydraulic pressure. The lengths of multiple groups of telescopic columns can be adjusted at one time and they share the same pressure, thereby ensuring that the guide blocks are accurately in place, improving the accuracy of the anti-deviation positioning structure, having a good use effect, and having a good use prospect.

[0041] Preferably, the fixing assembly comprises a plurality of groups of fixing columns, which are arranged on the main body in a circular array, and the lower ends of the fixing columns pass through through holes provided on the main body.

[0042] When fixing, the fixing column can be inserted into the soil by stepping on it, so as to fix the position of the main body.

[0043] Preferably, the fixed column includes a column body, a movable column and a limit pin:

[0044] A cavity is provided inside the column, and a plurality of groups of inclined holes are provided on the outer surface of the column near the lower end, wherein auxiliary rods are movably installed in the inclined holes;

[0045] The lower end of the movable column is inserted into the cavity, the lower end of the movable column is tapered, and the movable column is fixedly connected to one end of the auxiliary rod located inside the cavity through a rope;

[0046] One end of the limit pin passes through the limit hole provided on the main body and is inserted into the positioning hole on the outer surface of the movable column;

[0047] Wherein, pedals are provided on the upper end surfaces of the column and the movable column. When the movable column moves downward, the auxiliary rod is squeezed, and the auxiliary rod moves along the inclined hole and is inserted into the soil. When the movable column moves upward, the auxiliary rod is pulled, and the auxiliary rod moves along the inclined hole and retracts into the cavity.

[0048] When in use, the limit pin moves up and down, thereby changing the position of the movable column, so that the movable column can be inserted into the soil, or separated from the soil, thereby improving stability and achieving good use effect.

[0049] The utility model records an anti-drift positioning structure for a mixing pile, which is provided with a fixing component. When in use, the fixing component can fix the position of the main body. Cooperating with the calibration component, the overall stability is relatively high. In addition, an auxiliary rod is provided on the fixing column in the fixing component. The auxiliary rod is inserted into the soil from multiple directions, thereby ensuring the stability of the fixing column, thereby improving the stability of the anti-drift positioning structure, having a good use effect, and having a good use prospect.

[0050] In summary, the present invention includes at least one of the following beneficial technical effects:

[0051] First, the utility model records an anti-drift positioning structure for a mixing pile, which is provided with a calibration component. When in use, the calibration component can determine whether the center line of the calibration body and the center line of the pile opening are collinear, thereby determining whether the use of the anti-drift positioning structure is effective, thereby laying a foundation for the accuracy guidance of the anti-drift positioning structure, having good use effect and having good prospects for use.

[0052] Second, the utility model records an anti-deviation positioning structure for a mixing pile, which is provided with a positioning component. When in use, the length of multiple groups of telescopic columns can be adjusted by controlling the hydraulic pressure. The length of multiple groups of telescopic columns can be adjusted at one time, and they share the same pressure, thereby ensuring that the guide block is accurately in place, improving the accuracy of the anti-deviation positioning structure, having a good use effect, and having a good prospect for use.

[0053] Third, the utility model records an anti-deviation positioning structure for a mixing pile, which is provided with a fixing component. When in use, the fixing component can fix the position of the main body. In conjunction with the calibration component, the overall stability is relatively high. In addition, an auxiliary rod is provided on the fixed column in the fixing component. The auxiliary rod is inserted into the soil from multiple directions, thereby ensuring the stability of the fixed column, thereby improving the stability of the anti-deviation positioning structure, having a good use effect, and having a good prospect for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0055] Figure 2 It is a partial structural diagram of the utility model;

[0056] Figure 3 It is a top view of the structure of the utility model;

[0057] Figure 4 It is a structural diagram of the calibration component in the utility model;

[0058] Figure 5 It is a structural diagram of the positioning component in the utility model;

[0059] Figure 6It is a partial structural diagram of the fixed component in the utility model.

[0060] Figure numerals: 1. main body; 2. opening; 3. telescopic rod; 4. limit plate; 5. spring; 6. pressure sensor; 7. telescopic column; 8. guide block; 9. cylinder; 10. hydraulic pump; 11. liquid supply pipe; 12. laser ranging sensor; 13. fixed column; 14. auxiliary rod; 15. movable column; 16. limit pin. DETAILED DESCRIPTION

[0061] The embodiment of the present application provides an anti-deviation positioning structure for a mixing pile, thereby solving the problem that the prior art only considers the synchronous adjustment of the upper clamping arc plate, but does not consider the accuracy of the position of the positioner itself. When the position of the positioner itself is inaccurate, it is useless to adjust the clamping arc plate more accurately. Moreover, when adjusting using the above method, the screw rod assembly will block the mouth of the locator, affecting the insertion of the core pile. When the core pile is inserted, it is easy for the screw rod assembly to collide with the core pile, which can easily cause damage to the locator.

[0062] Embodiment 1:

[0063] An anti-deviation positioning structure for a mixing pile, such as Figure 1-Figure 6 As shown, it includes a main body 1, a positioning component, a calibration component and a fixing component:

[0064] The main body 1 is provided with an opening 2 for the core pile to pass through; the positioning component is installed on the main body 1 to define the position of the core pile; the calibration component is installed on the main body 1 to calibrate the position of the main body 1; the fixing component is installed on the main body 1 near the outer side to define the position of the main body 1

[0065] The calibration assembly includes several groups of calibration parts, which are distributed in a ring shape on the main body 1 and are used to calibrate the position of the main body 1 so that the center line of the calibration main body 1 is collinear with the center line of the stake opening.

[0066] The area near the stake opening is compacted, so the main body 1 is placed flat.

[0067] Working principle: When in use, the position of the main body 1 is calibrated through the calibration component, and then the main body 1 is fixed through the fixing component, and finally the position of the positioning component is adjusted to limit the position of the core pile.

[0068] The utility model records an anti-drift positioning structure for a mixing pile, which is provided with a calibration component. When in use, the calibration component can be used to determine whether the center line of the calibration body 1 is colinear with the center line of the pile opening, thereby determining whether the use of the anti-drift positioning structure is effective, thereby laying a foundation for the alignment guidance of the anti-drift positioning structure, having good use effect and having good use prospects.

[0069] The calibration part includes a telescopic rod 3 and a limit plate 4:

[0070] The main body of the telescopic rod 3 is fixedly mounted on the outer surface of the main body 1 near the lower end; the main body of the telescopic rod 3 is fixed by a thread, and the telescopic rod 3 can be directly rotated to be removed; the limit plate 4 is located inside the opening 2, and the telescopic end of the telescopic rod 3 passes through the main body 1 and is fixedly connected to the limit plate 4;

[0071] Among them, a sensing component is installed on the limiting plate 4.

[0072] Working principle: When in use, the telescopic rod 3 can drive the limit plate 4 to move, so that the limit plate 4 is located inside the stake opening, and the telescopic rod 3 is closed, the spring 5 contracts, so that the sensing part fits the inner wall of the stake opening. At this time, the sensing part detects the contact force with the inner wall. The normal spring 5 has the same contact force, so the center line of the calibration body 1 is collinear with the center line of the stake opening. When the force is not equal or the position of the body 1 is obviously wrong, the spring 5 can be removed and replaced.

[0073] The telescopic rod 3 adopts an electric push rod, and a spring 5 is installed between the limit plate 4 and the inner surface of the main body 1, and the spring 5 is sleeved on the telescopic rod 3.

[0074] The sensing element is a pressure sensor 6, and the lower half of the limit plate 4 extends to the inside of the stake opening. When the spring 5 recovers its deformation, the pressure sensor 6 fits against the inner wall of the stake opening.

[0075] Embodiment 2:

[0076] On the basis of Example 1, Figure 1-Figure 6 As shown, this embodiment is the structure of the positioning component.

[0077] The positioning assembly includes an adjustment member and a telescopic column 7:

[0078] The adjusting member is arranged on the main body 1 ; the number of telescopic columns 7 is several groups, and the telescopic columns 7 are installed on the inner wall of the opening 2 ; wherein the telescopic end of the telescopic column 7 is provided with a guide block 8 for guiding the core pile to pass through.

[0079] Working principle: When in use, the adjusting member can drive several groups of telescopic columns 7 to move synchronously, achieving a precise guiding effect.

[0080] The adjusting part includes an oil cylinder 9, a hydraulic pump 10 and a liquid supply pipe 11:

[0081] The oil cylinder 9 is fixedly mounted on the main body 1; the hydraulic pump 10 is mounted on the oil cylinder 9; and the liquid supply pipe 11 is mounted on the outer surface of the main body 1;

[0082] The hydraulic pump 10 delivers the fluid in the oil cylinder 9 to the inside of the fluid supply pipe 11 .

[0083] Working principle: When in use, the hydraulic pump 10 draws the oil in the oil cylinder 9 into the liquid supply pipe 11, thereby changing the telescopic length of the telescopic column 7, thereby changing the distance between the guide blocks 8, so that the guide blocks 8 can play the role of guiding the core pile.

[0084] The telescopic column 7 is a hydraulic telescopic column, the main body of which is fixedly mounted on the inner wall of the opening 2 , and the hydraulic telescopic column is connected to the liquid supply pipe 11 through a pipeline.

[0085] The oil pressure inside the liquid supply pipe 11 is constant, so the telescopic length of the hydraulic telescopic column is constant. The oil pressure inside the liquid supply pipe 11 can be adjusted according to the thickness of the core pile. A pressure gauge can be installed on the liquid supply pipe 11.

[0086] A mounting opening is provided on the guide block 8 at a position away from the telescopic column 7 , and a laser distance measuring sensor 12 with a wireless function is arranged inside the mounting opening.

[0087] Working principle: When in use, the laser distance sensor 12 measures the distance between the guide block 8 and the core pile, making the initial insertion position of the core pile more accurate, thereby improving the insertion accuracy of the core pile.

[0088] The utility model records an anti-deviation positioning structure for a mixing pile, which is provided with a positioning component. When in use, the length of multiple groups of telescopic columns 7 can be adjusted by controlling the hydraulic pressure. The lengths of multiple groups of telescopic columns 7 can be adjusted at one time and they share the same pressure, thereby ensuring that the guide blocks 8 are accurately in place, improving the accuracy of the anti-deviation positioning structure, having a good use effect, and having a good use prospect.

[0089] Embodiment 3:

[0090] On the basis of Example 2, Figure 1-Figure 6 As shown, this embodiment is a structure of a fixed component.

[0091] The fixing assembly includes a plurality of groups of fixing columns 13 , which are arranged on the main body 1 in a ring array, and the lower ends of the fixing columns 13 pass through through holes provided on the main body 1 .

[0092] Working principle: When fixing, stepping on the fixing column 13 can make the fixing column 13 inserted into the soil, so as to fix the position of the main body 1.

[0093] The fixed column 13 includes a column body, a movable column 15 and a limit pin 16:

[0094] A cavity is provided inside the column, and a plurality of groups of inclined holes are provided on the outer surface of the column near the lower end, in which an auxiliary rod 14 is movably installed; the lower end of a movable column 15 is inserted into the cavity, and the lower end of the movable column 15 is tapered, and the movable column 15 is fixedly connected to one end of the auxiliary rod 14 located inside the cavity through a rope; one end of a limiting pin 16 passes through the limiting hole provided on the main body 1 and is inserted into the positioning hole on the outer surface of the movable column 15;

[0095] Among them, pedals are provided on the upper end surfaces of the column and the movable column 15. When the movable column 15 moves downward, it squeezes the auxiliary rod 14, and the auxiliary rod 14 moves along the inclined hole and is inserted into the soil. When the movable column 15 moves upward, it pulls the auxiliary rod 14, and the auxiliary rod 14 moves along the inclined hole and shrinks into the cavity.

[0096] Working principle: When in use, the limit pin 16 moves up and down, thereby changing the position of the movable column 15, so that the movable column 15 can be inserted into the soil, or separated from the soil, thereby improving stability and achieving good use effect.

[0097] The utility model records an anti-drift positioning structure for a mixing pile, which is provided with a fixing component. When in use, the fixing component can fix the position of a main body 1. Cooperating with a calibration component, the overall stability is relatively high. In addition, an auxiliary rod 14 is provided on a fixing column 13 in the fixing component. The auxiliary rod 14 is inserted into the soil from multiple directions, thereby ensuring the stability of the fixing column 13, thereby improving the stability of the anti-drift positioning structure, having a good use effect, and having a good use prospect.

[0098] Working principle: When in use, calibrate the position of the main body 1 through the calibration component, then fix the main body 1 through the fixing component, and finally adjust the position of the positioning component to limit and guide the position of the core pile. After the core pile is inserted, the fixing component and the calibration component can be disassembled by reverse operation, which is convenient to use.

[0099] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. An anti-deviation positioning structure for a mixing pile, characterized in that: include: A main body (1) having an opening (2) therein for the core pile to pass through; A positioning assembly, which is mounted on the main body (1) and is used to define the position of the core pile; a calibration component, which is mounted on the main body (1) and is used to calibrate the position of the main body (1); A fixing assembly, which is mounted on the main body (1) near the outer side and is used to define the position of the main body (1); The calibration assembly comprises a plurality of calibration parts, which are distributed in a ring shape on the main body (1) and are used to calibrate the position of the main body (1) so that the center line of the calibration main body (1) is collinear with the center line of the stake opening.

2. The anti-deviation positioning structure for a mixing pile according to claim 1, characterized in that: The calibration piece comprises: A telescopic rod (3), the main body of which is fixedly mounted on the outer surface of the main body (1) near the lower end; A limiting plate (4) is located inside the opening (2); the telescopic end of the telescopic rod (3) passes through the main body (1) and is fixedly connected to the limiting plate (4); Wherein, a sensing component is installed on the limiting plate (4).

3. The anti-deviation positioning structure for a mixing pile according to claim 2, characterized in that: The telescopic rod (3) adopts an electric push rod, and a spring (5) is installed between the limit plate (4) and the inner surface of the main body (1), and the spring (5) is sleeved on the telescopic rod (3).

4. The anti-deviation positioning structure for a mixing pile according to claim 3, characterized in that: The sensing element is a pressure sensor (6), the lower half of the limit plate (4) extends to the inside of the stake opening, and when the spring (5) recovers its deformation, the pressure sensor (6) fits against the inner wall of the stake opening.

5. The anti-deviation positioning structure for a mixing pile according to claim 1, characterized in that: The positioning component comprises: An adjusting member, which is arranged on the main body (1); Telescopic columns (7), which are provided in a plurality of groups and are mounted on the inner wall of the opening (2); Wherein, the telescopic end of the telescopic column (7) is provided with a guide block (8) for guiding the core pile to pass through.

6. The anti-deviation positioning structure for a mixing pile according to claim 5, characterized in that: The adjusting member comprises: An oil cylinder (9) fixedly mounted on the main body (1); A hydraulic pump (10) mounted on the oil cylinder (9); A liquid supply pipe (11) mounted on the outer surface of the main body (1); The hydraulic pump (10) delivers the fluid in the oil cylinder (9) to the inside of the fluid supply pipe (11).

7. The anti-deviation positioning structure for a mixing pile according to claim 5, characterized in that: The telescopic column (7) is a hydraulic telescopic column, the main body of which is fixedly mounted on the inner wall of the opening (2), and the hydraulic telescopic column is connected to the liquid supply pipe (11) through a pipeline.

8. The anti-deviation positioning structure for a mixing pile according to claim 5, characterized in that: The guide block (8) is provided with a mounting opening at a position away from the telescopic column (7), and a laser distance measuring sensor (12) with a wireless function is arranged inside the mounting opening.

9. The anti-deviation positioning structure for a mixing pile according to claim 1, characterized in that: The fixing assembly comprises a plurality of groups of fixing columns (13), wherein the plurality of groups of fixing columns (13) are arranged on the main body (1) in a circular array, and the lower ends of the fixing columns (13) pass through through holes provided on the main body (1).

10. The anti-deviation positioning structure for a mixing pile according to claim 9, characterized in that: The fixing column (13) comprises: A column having a cavity formed inside and a plurality of groups of inclined holes formed on its outer surface near the lower end, wherein auxiliary rods (14) are movably installed in the inclined holes; A movable column (15), the lower end of which is inserted into the cavity, the lower end of the movable column (15) is tapered, and the movable column (15) is fixedly connected to one end of the auxiliary rod (14) located inside the cavity through a rope; A limiting pin (16), one end of which passes through a limiting hole provided on the main body (1) and is inserted into a positioning hole on the outer surface of the movable column (15); The upper end surfaces of the column and the movable column (15) are both provided with pedals. When the movable column (15) moves downward, it squeezes the auxiliary rod (14), and the auxiliary rod (14) moves along the inclined hole and is inserted into the soil. When the movable column (15) moves upward, it pulls the auxiliary rod (14), and the auxiliary rod (14) moves along the inclined hole and shrinks into the cavity.

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