Cast-in-place pile slurry modification, dehydration and stirring device

Abstract

The invention discloses a cast-in-place pile slurry modifying, dehydrating and stirring device, which relates to the technical field of construction wastewater treatment and comprises a guide rail, a cross beam and a traction mechanism, the stirring mechanism is positioned below the cross beam and is used for stretching into the slurry to perform stirring action; the linkage mechanism is mounted on the cross beam and is used for linking the traction mechanism and the stirring mechanism; a cantilever extending downwards is fixed on the cross beam, the stirring mechanism comprises a rotating shaft I and a spiral blade coaxially fixed on the rotating shaft I, and the rotating shaft I is rotationally connected with the cantilever; a tooth structure is arranged on the guide rail and is distributed along the length of the guide rail; the linkage mechanism comprises an upper gear set, a lower gear and a chain, the upper gear set comprises a first gear and a second gear which are coaxially fixed, the first gear is rotationally connected to the cross beam and meshed with the tooth structure, the lower gear is coaxially fixed to the first rotating shaft, and the second gear and the lower gear are sleeved with the chain. The slurry modification dehydration treatment effect on the construction site can be improved.

Description

Technical Field

[0001] This application relates to the technical field of construction wastewater treatment, and particularly to a modified dehydration stirring device for bored pile mud. Background Art

[0002] In a large number of deep foundation and ground construction projects, bored cast-in-place piles are widely used. During the construction process of bored cast-in-place piles, the slurry wall protection technology is generally used. The static pressure of the slurry on the groove wall and the mud cake formed by the slurry on the groove wall can effectively prevent the collapse of the groove and hole walls, making it easy to meet the requirements of pile driving.

[0003] After the above-mentioned construction of the pile is completed, a large amount of waste slurry to be treated will be generated on site. Since the waste slurry has a very high consistency and is difficult to sink naturally and cannot be directly discharged, the construction site usually has to store the waste slurry centrally first and then treat it centrally. In the past, construction sites generally loaded the waste slurry directly onto trucks and pulled it out of the site, and then discarded it, which caused serious harm to the surrounding environment of the disposal site and was prone to secondary water pollution, etc.

[0004] In response to the above problems, at present, relevant units and personnel have proposed a waste slurry solution: a chemical coagulation solid-liquid separation treatment method. Specifically: by adding a flocculant to the slurry, the flocculant mainly increases the collision of coagulated solids, makes its hydrolysis products agglomerate, bridge and flocculate to form sedimentable or filterable flocs, changes the chemical stability of the slurry system to separate water and solid-phase particles, reduces the amount of waste slurry and dries it, which is convenient for transportation and reduces environmental pollution.

[0005] In the above process, there are the following problems: in the slurry pool excavated at the slurry pumping site, it is necessary to stir the slurry in the pool. At present, it is mostly construction workers who hold electric stirrers to stir, and even the excavator may be driven over to stir. The above is likely to cause uneven stirring, relatively likely to lead to unstable modified dehydration effect of the slurry, and easy to cause material waste. Therefore, this application proposes a new technical solution. Summary of the Invention

[0006] In order to improve the modified dehydration treatment effect of the slurry at the construction site and reduce material waste, this application provides a modified dehydration stirring device for bored pile mud.

[0007] This application provides a modified dehydration stirring device for bored pile mud, and adopts the following technical solutions:

[0008] A modified dehydration stirring device for bored pile mud, comprising:

[0009] Guide rails, at least two of which are respectively arranged on both sides of the slurry pool;

[0010] Cross beams, which span across the slurry pool and the ends thereof rest on the guide rails;

[0011] A traction mechanism for pulling a cross beam to move along a guide rail;

[0012] A stirring mechanism located below the cross beam and used to extend into the mud to perform a stirring action; and,

[0013] A linkage mechanism installed on the cross beam and used to link the traction mechanism and the stirring mechanism;

[0014] Wherein, a cantilever extending downward is fixed to the cross beam, the stirring mechanism includes a first rotating shaft and a spiral blade coaxially fixed to the first rotating shaft, and the first rotating shaft is rotatably connected to the cantilever;

[0015] A tooth structure is provided on the guide rail, and the tooth structure is distributed along the length of the guide rail;

[0016] The linkage mechanism includes an upper gear set, a lower gear and a chain. The upper gear set includes a first gear and a second gear coaxially fixed. The first gear is rotatably connected to the cross beam and meshes with the tooth structure. The lower gear is coaxially fixed to the first rotating shaft, and the chain is sleeved on the second gear and the lower gear; a material tank for storing a dehydration additive is provided on the cross beam, a material discharging port is provided at the bottom of the material tank, the first gear and the second gear are penetrated by a second rotating shaft, the second rotating shaft extends below the material discharging port, a material discharging ball is sleeved on a section of the second rotating shaft located below the material discharging port, the material discharging ball is partially clamped into the material discharging port and is adapted, the material discharging ball is of a notch structure, and after the second rotating shaft drives the material discharging ball to rotate, the notch is on the rotation path.

[0017] Optionally, there are multiple lower gears and they are coaxially fixed. The sizes of the multiple lower gears are different. A tension adjusting mechanism acting on the chain is provided below the cross beam, and a gear switching mechanism acting on the chain is provided on the side of the lower gear.

[0018] Optionally, the tension adjusting mechanism includes a telescopic rod and an adjusting gear. A chain cover box is fixed to the lower part of the cross beam. The chain and the lower gear are located in the chain cover box. The first rotating shaft penetrates out of the chain cover box. The telescopic rod includes an outer tube, an inner rod and a spring. The outer tube is installed on the inner wall of the chain cover box. The inner rod is slidably connected to the outer tube and one end extends out of the outer tube. The spring is located in the outer tube and one end is fixed to the outer tube and the other end is fixed to the inner rod; the adjusting gear is rotatably connected to the outer end of the inner rod and meshes with the inner side of the chain.

[0019] Optionally, a pressure sensor is fixed to the inner end of the inner rod, and the detection end of the pressure sensor contacts one end of the spring; an electric cylinder one is arranged in the outer tube, and the telescopic rod end of the electric cylinder one is fixed to the inner end of the inner rod.

[0020] Optionally, the gear switching mechanism includes a speed change ring and an electric cylinder II. The speed change ring is sleeved on a section of the chain close to the lower gear. The electric cylinder II is installed in the chain cover box, and the telescopic rod end thereof is fixed to the speed change ring. The telescopic direction of the electric cylinder II is perpendicular to the lower gear.

[0021] Optionally, there are at least two material troughs, which are respectively used for storing different dehydration additives, and the feeding ball is detachably connected to the rotating shaft.

[0022] Optionally, the inner bottom surface of the material trough is the lowest at the edge position of the feeding port.

[0023] Optionally, a screw rod is fixed to the bottom of the guide rail. The screw rod extends downward, and the lower end thereof is threadedly connected to a bracket.

[0024] Optionally, a plurality of weighing units and a top plate are arranged on the upper part of the guide rail. The plurality of weighing units are distributed along the length direction of the guide rail and are embedded in the guide rail. The detection end of the weighing unit extends upward out of the upper surface of the guide rail. A bottom rod is fixed to the bottom of the top plate. A jack is opened on the upper part of the guide rail. The top plate is placed above the guide rail, and the bottom rod is inserted into the jack. The plurality of top plates are arranged along the length of the guide rail and are in contact with each other. The cross beam is placed on the top plate; the weighing sensor is electrically connected to a controller, and the controller is electrically connected to a display and is configured to:

[0025] Calculate the horizontal moving speed of the stirring mechanism according to the successive weight changes of the plurality of weighing sensors;

[0026] Calculate the feeding speed according to the detection values of adjacent weighing units and the interval time pressed by the cross beam;

[0027] Enable the display screen to display the horizontal moving speed and the feeding speed simultaneously, and display the ratio of the two.

[0028] In summary, the present application includes the following beneficial technical effects: When it is necessary to stir the slurry in the slurry pit, first lay the guide rail on the edge of the slurry pit, then erect the cross beam so that the spiral blade extends into the slurry, and then pull the cross beam to move along the guide rail with the traction mechanism; during the movement of the cross beam, the first gear rotates relative to the tooth structure on the guide rail. When the first gear rotates, it drives the lower gear to rotate through the chain, and the lower gear rotates to drive the coaxial spiral blade to rotate, thereby realizing stirring; because the above structure is simple to erect and assemble, it can be conveniently applied to automatically stir the slurry at the construction site, ensure the stirring effect, make the slurry modification and dehydration effect more stable, reduce the dosage of additives, and reduce material waste; at the same time, because stirring does not require an additional design of power and directly uses the power converted during movement, the structure is further lightened. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall structural schematic diagram of the present application;

[0030] Figure 2 is a schematic diagram of a partial cross-sectional structure of the present application;

[0031] Figure 3 is a schematic diagram of a partial cross-sectional structure of another embodiment of the present application;

[0032] Figure 4 is a schematic diagram of the structure of the tightness adjustment mechanism of the present application.

[0033] Explanation of reference numerals: 1, guide rail; 11, screw; 12, bracket; 2, cross beam; 21, cantilever; 22, material trough; 3, traction mechanism; 4, stirring mechanism; 41, spiral blade; 42, first rotating shaft; 51, upper gear set; 511, first gear; 512, second gear; 52, lower gear; 53, chain; 54, second rotating shaft; 55, blanking ball; 6, chain cover box; 7, tightness adjustment mechanism; 71, telescopic rod; 711, spring; 72, adjusting gear; 8, gear switching mechanism; 81, speed change ring; 82, second electric cylinder; 9, first electric cylinder. Detailed implementation manners

[0034] The following further describes the present application in detail Figures 1-4 in conjunction with the appended drawings.

[0035] The embodiment of the present application discloses a modified dehydration stirring device for cast-in-place pile mud.

[0036] Referring to Figure 1 , the modified dehydration stirring device for cast-in-place pile mud includes a guide rail 1, a cross beam 2, a traction mechanism 3, a stirring mechanism 4 and a linkage mechanism. Among them, there are at least two guide rails 1, which are respectively arranged on both sides of the mud pool. Taking two guide rails 1 and the mud pool having a rectangular shape in plan view as an example, there is one guide rail 1 on one long side of the mud pool. The cross beam 2 spans across the mud pool and its ends rest on the guide rail 1. In order to maintain stability, the guide rail 1 is provided with a chute that is inverted T-shaped in end view along its length direction, and a slider adapted to the chute is fixed at the bottom of the cross beam 2 to realize the sliding connection between the cross beam 2 and the guide rail 1.

[0037] As can be seen from the above, when the cross beam 2 moves, it moves along the guide rail 1. Therefore, the two guide rails 1 need to be horizontal and at the same height. However, the ground near the mud pool dug at the construction site is often uneven. For this reason, screw 11 is threadedly connected to the bottom of the guide rail 1, and there are multiple screws 11 and they are evenly distributed; the screw 11 extends downward and its lower end is threadedly connected to the bracket 12. During use, the bracket 12 is anchored and inserted and fixed on the ground, and then the cross beam 2 is fixed with the screw 11. During the process, the height of the cross beam 2 is adjusted to be the same by adjusting the screw 11, and the cross beam 2 is adjusted to be horizontal.

[0038] The movement of the cross beam 2 is realized by a traction mechanism 3 in this application. The traction mechanism 3 can be a winch. A set of winches is arranged at both ends of the guide rail 1 respectively. The ropes and hooks of the winches are fixed on the pull rings on the cross beam 2. After the winch is started, the cross beam 2 can be pulled to move along the guide rail 1.

[0039] Refer to Figure 1 and Figure 2 As shown in FIGS. and, the stirring mechanism 4 is located below the cross beam 2 and is used to extend into the mud to perform the stirring action. The stirring mechanism 4 includes a spiral blade 41 and a first rotating shaft 42; a cantilever 21 extending downward is fixed at the bottom of the cross beam 2. The first rotating shaft 42 is rotatably connected to the cantilever 21. The spiral blade 41 is spirally distributed around the first rotating shaft 42. The spiral blade 41 rotates in the mud to realize the stirring of the mud.

[0040] The linkage mechanism includes an upper gear set 51, a lower gear 52 and a chain 53. Among them, the upper gear set 51 includes a gear one 511 and a gear two 512 fixed coaxially. The gear one 511 and the gear two 512 are penetrated by a second rotating shaft 54 and are fixed to each other. The second rotating shaft 54 is rotatably connected through a bearing seat installed at the bottom of the cross beam 2.

[0041] The end view of the guide rail 1 is L-shaped and horizontally faces one side of the mud pool. A tooth structure, such as a rack, is welded on the upper part of the horizontal section of the guide rail 1. The rack is distributed along the length of the guide rail 1. The gear one 511 meshes with the rack. The lower gear 52 is coaxially fixed to the first rotating shaft 42. The gear two 512 and the lower gear 52 are sleeved by the chain 53 to form a chain drive structure.

[0042] According to the above settings, when it is necessary to stir the mud in the mud pool, first lay the guide rail 1 on the edge of the mud pool, then erect the cross beam 2 so that the spiral blade 41 extends into the mud, and then pull the cross beam 2 to move along the guide rail 1 with the traction mechanism 3; during the movement of the cross beam 2, the gear one 511 rotates relative to the tooth structure on the guide rail 1. When the gear one 511 rotates, it drives the lower gear 52 to rotate through the chain 53. The lower gear 52 rotates to drive the coaxially arranged spiral blade 41 to rotate, thereby realizing the stirring. Because the above structure is simple to erect and assemble, it can be conveniently applied to automatically stir the mud at the construction site, ensure the stirring effect, make the mud modification and dehydration effect more stable, reduce the dosage of additives, and reduce material waste. At the same time, because the stirring does not require an additional designed power and directly uses the power converted during the movement, the structure is further lightened; this design can also be used to cooperate with the subsequent feeding, making the feeding more in line with the stirring process requirements of the mud modification and dehydration, which will be specifically elaborated later.

[0043] Refer to Figure 1 and Figure 2, a material groove 22 is formed on the cross beam 2. The material groove 22 has an upward opening structure and is used to store dehydration additives, such as polyacrylamide and quicklime. The feeding of the material groove 22 can be carried out by a spiral feeder inclined upward in cooperation with a downward pipeline to send the materials into the material groove 22.

[0044] A material discharging port is formed at the bottom of the material groove 22; a discharging ball 55 is sleeved on the second rotating shaft 54, or the discharging ball 55 is penetrated by the second rotating shaft 54. The discharging ball 55 is partially clamped into the material discharging port and is adapted. The discharging ball 55 has a notch structure, and after the second rotating shaft 54 drives the discharging ball 55 to rotate, the notch is located on the rotation path. That is, when the material can enter the notch and leave the material groove 22 along with the rotation of the discharging ball, when the notch of the discharging ball 55 is located at the edge of the material discharging port, the additive drops from the material discharging port.

[0045] According to the above settings, during the movement of the cross beam 2, it can be linked to discharge materials, and the faster it moves, the faster the discharging speed. It meets the requirements of adding medicine while stirring during the mud modification dehydration and adding medicine process, and the adding medicine and stirring should be coordinated. It can make the additive and the mud mix more fully, avoiding the situation that on the construction site, in order to save trouble, the additive is directly poured in at one time and then stirred slowly, or the amount of additive added is more or less by feeling.

[0046] Refer to Figure 1 , there are at least two material grooves 22. Taking two as an example: one is used to contain polyacrylamide, and the other is used to contain quicklime, and the two material grooves 22 are parallel to each other. Because they are separated now, the size of the material discharging port can be adjusted to change the discharging rate to meet the requirements of the proportion settings of different materials.

[0047] Because the adjustment of the material discharging port is relatively unchanged, the discharging ball 55 can also be set as a split splicing structure, and the two halves are fixed with screws; at this time, the discharging ball 55 is a convenient disassembly and assembly structure, so the staff can select a sphere with an appropriate notch size for installation according to the proportion requirements to achieve the purpose of adjusting the synchronous discharging amount ratio control.

[0048] The above setting of the discharging ball 55 can also be used to dredge the discharging and reduce the probability of materials accumulating and stagnating in the material groove 22. The inner bottom surface of the material groove 22 is the lowest at the edge position of the material discharging port to further ensure smooth discharging.

[0049] Refer to Figure 1 , a chain cover box 6 is fixed at the bottom of the cross beam 2. The lower gear 52 and the chain 53 are located inside the chain cover box 6. The first rotating shaft 42 and the second rotating shaft 54 both penetrate through the chain cover box 6. The setting of the chain cover box 6 can prevent the mud from polluting the chain 53 and causing obstruction. The shaft end sealing structure, oil seal structure, etc. can be set at the position where the shaft penetrates. This is the prior art and will not be elaborated here.

[0050] In another embodiment of the present application, in order to enable the present application to meet the mud stirring requirements of different components, a plurality of lower gears 52 are provided, and the sizes of the plurality of lower gears 52 are different, so as to adjust the actual stirring rate by changing the transmission ratio by switching gears of different sizes. Specifically: a tension adjusting mechanism 7 acting on the chain is provided below the cross beam, and a gear switching mechanism 8 acting on the chain is provided on the side of the lower gear 52.

[0051] Referring to Figure 3 and Figure 4 , the tension adjusting mechanism 7 includes a telescopic rod 71 and an adjusting gear 72. The telescopic rod 71 includes an outer tube, an inner rod and a spring 711; the telescopic rod 71 is located inside the chain; the outer tube is movably connected to a bracket through a ball head, the bracket is fixed to the inner wall of the chain cover box 6, the outer tube is horizontal, and the inner rod is slidably connected to the outer tube and one end extends out of the outer tube.

[0052] The spring 711 is located inside the outer tube and one end is fixed to the fixed position of the outer tube, and the other end is fixed to (abuts against) the inner rod; the adjusting gear 72 is rotatably connected to the outer end of the inner rod through a rotating shaft and meshes with the inner side of the chain 53.

[0053] According to the above settings, the adjusting gear 72 is kept pressing against the chain 53 under the action of the spring 711 to ensure that it is always taut.

[0054] Referring to Figure 3 , the gear switching mechanism 8 includes a speed change ring 81 and an electric cylinder II 82. The speed change ring 81 is of a flat structure and is sleeved on a section of the chain 53 close to the lower gear 52. The electric cylinder II 82 is installed in the chain cover box 6 and the telescopic rod end is fixed to the speed change ring 81. The telescopic direction of the electric cylinder II 82 is perpendicular to the lower gear 52.

[0055] According to the above settings, when it is necessary to change the stirring speed under the condition that the speed of the traction cross beam 2 remains unchanged, the staff can control the telescopic movement of the electric cylinder II 82, so that the chain can be deflected and transferred to another lower gear 52 by the speed change ring 81.

[0056] In another embodiment of the present application, a pressure sensor is embedded and fixed at the inner end of the inner rod, and the detection end of the pressure sensor contacts one end of the spring 711; an electric cylinder I 9 is arranged inside the outer tube, and the telescopic rod end of the electric cylinder I is fixed to the inner end of the inner rod.

[0057] According to the above settings, the staff can read the detection value of the pressure sensor through the corresponding display screen, and then manually adjust the ejection amount of the chain 53, that is, the tightness degree, through the electric cylinder I 9.

[0058] In another embodiment of the present device, a plurality of weighing units (such as spoke type pressure sensors) and a top plate are provided on the upper part of the above-mentioned guide rail 1. In this embodiment, the number of the weighing units and the top plate is the same and they correspond to each other one by one.

[0059] Multiple weighing units are distributed along the length direction of the guide rail 1 and embedded in the guide rail. The detection ends of the weighing units extend upward from the upper surface of the guide rail 1. A bottom rod is welded to the bottom of the top plate. A jack is provided in the upper part of the guide rail 1. The top plate is placed above the guide rail 1, and the bottom rod is inserted into the jack; there is a weighing unit below each top plate. Multiple top plates are arranged along the length of the guide rail 1 and are in contact with each other. The cross beam 2 is placed on the top plates, that is, the cross beam 2 moves above the top plates.

[0060] The weighing sensor is electrically connected to a controller, and the controller can be installed in the box structure on the side of the guide rail 1. The controller is electrically connected to the above-mentioned display and is configured as:

[0061] 1), Calculate the horizontal movement speed of the stirring mechanism 4 according to the successive weight changes of multiple weighing sensors. Specifically:

[0062] Define the weighing sensors on the same guide rail 1 as A1, A2... An in sequence; where n is the position order of the weighing sensors;

[0063] If the detected value of A1 at time t1 meets the pressure range when the cross beam 2 presses on the top plate, and the detected value of An at time t2 meets the pressure range when the cross beam 2 presses on the top plate, then the horizontal movement speed is calculated by (n - 1)*d / (t2 - t1); where d is the pre-stored distance between adjacent weighing units.

[0064] 2), Calculate the feeding speed according to the detected values of adjacent weighing units and the interval duration when being pressed by the cross beam 2. Specifically:

[0065] Assume that the detected value of A1 at time t1 is G1, and the detected value of A2 at time t2 is G2, and t2 > t1, then the feeding speed = (G2 - G1) / (t2 - t1).

[0066] 3), Make the display screen display the horizontal movement speed and the feeding speed simultaneously, and display the ratio of the two.

[0067] According to the above settings, on the basis of the foregoing structural design, this device can analyze the feeding speed of the raw materials and the horizontal displacement speed of the stirring mechanism 4 only by using the weighing sensors, clearly obtain the mathematical relationship between the two, provide support for accurate feeding in the application environment of this device, ensure the dehydration effect while reducing material waste.

[0068] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore: All equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A cast-in-place pile mud modification dehydration stirring device, characterized in that: include: There are at least two guide rails (1) arranged on both sides of the mud pool respectively; A crossbeam (2) which spans the mud pool and has its end resting on the guide rail (1); A traction mechanism (3) for traction of the crossbeam (2) to move along the guide rail (1); a stirring mechanism (4), which is located below the crossbeam (2) and is used to extend into the mud to perform stirring action; and, A linkage mechanism, which is mounted on the crossbeam (2) and is used to link the traction mechanism (3) and the stirring mechanism (4); The crossbeam (2) is fixed with a cantilever (21) extending downward, the stirring mechanism (4) comprises a rotating shaft (42) and a spiral blade (41) coaxially fixed to the rotating shaft (42), and the rotating shaft (42) is rotatably connected to the cantilever (21); The guide rail (1) is provided with a tooth structure, and the tooth structure is distributed along the length of the guide rail (1); The linkage mechanism comprises an upper gear set (51), a lower gear (52) and a chain (53); the upper gear set (51) comprises a coaxially fixed gear 1 (511) and a coaxially fixed gear 2 (512); the gear 1 (511) is rotatably connected to the crossbeam (2) and meshed with the tooth structure; the lower gear (52) is coaxially fixed to the rotating shaft 1 (42); and the chain (53) is sleeved with the gear 2 (512) and the lower gear (52); The cross beam (2) is provided with a trough (22) for storing dehydrated additives, and a discharge port is provided at the bottom of the trough (22). The gear 1 (511) and the gear 2 (512) are provided with a rotating shaft 2 (54) passing through, and the rotating shaft 2 (54) extends to below the discharge port. A section of the rotating shaft 2 (54) located below the discharge port is sleeved with a discharge ball (55), and the discharge ball (55) is partially inserted into the discharge port and fits in the discharge port. The discharge ball (55) is a notch structure, and after the rotating shaft 2 (54) drives the discharge ball (55) to rotate, the notch is located on the rotation path.

2. The cast-in-place pile slurry modification, dehydration and stirring device according to claim 1, characterized in that: The lower gears (52) are multiple and coaxially fixed, and the multiple lower gears (52) are of different sizes. A tension adjustment mechanism (7) acting on the chain (53) is arranged below the crossbeam (2), and a gear switching mechanism (8) acting on the chain (53) is arranged on the side of the lower gears (52).

3. The cast-in-place pile mud modification dehydration stirring device according to claim 2 is characterized in that: The tension adjustment mechanism (7) comprises a telescopic rod (71) and an adjustment gear (72); the lower part of the crossbeam (2) is fixed with a chain cover box (6); the chain (53) and the lower gear (52) are located in the chain cover box (6); the rotating shaft (42) passes through the chain cover box (6); the telescopic rod (71) comprises an outer tube, an inner rod and a spring (711); the outer tube is mounted on the inner wall of the chain cover box (6); the inner rod is slidably connected to the outer tube and one end of the inner rod extends out of the outer tube; the spring (711) is located in the outer tube and one end is fixed to the outer tube and the other end is fixed to the inner rod; the adjustment gear (72) is rotatably connected to the outer end of the inner rod and meshes with the inner side of the chain (53).

4. The bored pile mud modification dehydration stirring device according to claim 3 is characterized by: A pressure sensor is fixed to the inner end of the inner rod, and a detection end of the pressure sensor contacts one end of a spring (711); an electric cylinder (9) is arranged inside the outer tube, and an end of a telescopic rod (71) of the electric cylinder (9) is fixed to the inner end of the inner rod.

5. The cast-in-place pile slurry modification, dehydration and stirring device according to claim 3 is characterized by: The gear switching mechanism (8) comprises a speed change ring (81) and a second electric cylinder (82); the speed change ring (81) is sleeved on a section of the chain (53) close to the lower gear (52); the second electric cylinder (82) is installed in the chain cover box (6) and the speed change ring (81) is fixed at the end of the telescopic rod (71); and the telescopic direction of the second electric cylinder (82) is perpendicular to the lower gear (52).

6. The bored pile mud modification dehydration stirring device according to claim 1, characterized in that: There are at least two material troughs (22) for storing different dehydrated additives respectively, and the material discharge ball (55) is detachably connected to the rotating shaft.

7. The cast-in-place pile mud modification, dehydration and stirring device according to claim 1, characterized in that: The inner bottom surface of the material trough (22) is at its lowest position at the edge of the material discharge opening.

8. The bored pile mud modification dehydration stirring device according to claim 1 is characterized by: A screw rod (11) is fixed at the bottom of the guide rail (1), and the screw rod (11) extends downward and has a bracket (12) threadedly connected at the lower end.

9. The cast-in-place pile mud modification dehydration stirring device according to claim 1, characterized in that: The guide rail (1) is provided with a plurality of weighing units and a top plate on its upper part. The plurality of weighing units are distributed along the length direction of the guide rail (1) and embedded in the guide rail. The detection end of the weighing unit extends upward from the upper surface of the guide rail (1). A bottom rod is fixed to the bottom of the top plate. A plug hole is provided on the upper part of the guide rail (1). The top plate is placed above the guide rail (1). The bottom rod is plugged into the plug hole. The plurality of top plates are arranged along the length of the guide rail (1) and contact each other. The crossbeam (2) is placed on the top plate. The weighing sensor is electrically connected to a controller. The controller is electrically connected to a display and is configured as follows: Calculating the horizontal moving speed of the stirring mechanism (4) according to the weight changes of the multiple weighing sensors in sequence; The feeding speed is calculated according to the detection values ​​of the adjacent weighing units and the interval time when the weighing units are pressed by the cross beam (2); The display screen displays the horizontal moving speed and the feeding speed at the same time, and displays the ratio between the two.

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