A device for removing mud from the inner wall of bored pile steel casing

Abstract

The invention discloses a device for cleaning mud on the inner wall of a steel casing of a bored pile, comprising a cleaning chamber, a connecting pipe assembly being arranged at the center position of the upper end surface of the cleaning chamber, a plurality of mud cleaning assemblies being arranged in the cleaning chamber for circumferential rotation, the cleaning chamber and the supporting rods provided in the invention, the whole device being supported on the inner wall of the steel casing by the supporting rods, the mud pump being connected by the connecting pipe assembly, the mud pump pumping clarified water into the cleaning chamber, and discharging the clarified water through the mud cleaning assembly, the liquid flow being discharged from the curved cleaning head at the front end of the mud cleaning assembly by utilizing the water pressure generated by the mud pump, and the mud on the inner wall being cleaned, and the reaction force being utilized to rotate the device at the same time, so that the mud scraper fixed at the front end of the mud cleaning assembly scrapes off the mud adhered to the inner wall of the steel casing, so that the mud adhered to the steel casing during hole forming can be cleaned, thereby increasing the bonding force between the concrete and the steel casing, and the restraining force of the steel casing on the concrete.

Description

Technical Field

[0001] The invention belongs to the technical field of bored piles, and in particular relates to a device for removing mud from the inner wall of a steel casing of a bored pile. Background Art

[0002] Bored piles are a common substructure in bridge engineering. The steel casing is not only the external formwork for pouring concrete for pile foundations, a temporary fixing point for the construction of the pedestal, but also an additional measure for the durability of the pile foundation. During the construction of bored piles, the common way to clean the mud is the mud replacement method, which injects clarified slurry into the bottom of the hole to continuously replace the debris produced by drilling in the steel casing, thereby cleaning the inside of the steel casing. After secondary cleaning, underwater concrete is injected into the bottom of the pile foundation for pile formation. However, during the process of drilling holes by rotary drilling, soft mud blocks are easily adhered to the inner wall of the steel casing. It is difficult to completely remove the mud attached to the inner wall of the steel casing when using the mud replacement method to clean the hole. The presence of the mud layer greatly reduces the bonding force between the pile foundation concrete and the steel casing and the restraint force of the steel casing on the pile foundation concrete, which causes quality problems in the pile formation and causes the strength of the pile structure to fall short of the design expectations. Summary of the invention

[0003] The purpose of the present invention is to provide a device for removing mud from the inner wall of a bored pile steel casing, so as to solve the technical problem that mud adhered to the inner wall of the steel casing is difficult to be effectively cleaned during the construction of bored piles.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A device for removing mud from the inner wall of a bored pile steel casing comprises a cleaning chamber, a connecting pipe assembly is provided at the center of the upper end surface of the cleaning chamber, a plurality of mud cleaning assemblies are matched with the cleaning chamber for circumferential rotation, a supporting rod for clamping the cleaning chamber is provided at the bottom of the cleaning chamber, the mud cleaning assembly comprises a reversible guide vane, a flushing conduit is matched with the center of the guide vane for rotation, one end of the flushing conduit is matched with the cleaning chamber for rotation, and a limited stop ring is fixed at one end of the guide vane close to the cleaning chamber;

[0006] The cleaning chamber includes a reversing component, and the reversing component and the guide vane are a matching mechanism. The reversing component is arranged inside the cleaning chamber and is connected to the guide vane through a transmission mechanism to control the inclination direction of the guide vane.

[0007] The reversing assembly includes a central guide rod fixed at the central position inside the cleaning chamber, a plurality of guide vanes are mounted on the outer wall of the central guide rod, a support spring is provided between the guide vane and the bottom of the central guide rod, a connecting protrusion is welded to the bottom of the guide vane, one end of the connecting protrusion is rotatably engaged with a fixing rod, and the fixing rod is fixedly connected to the cleaning chamber, a connecting rod assembly is welded to the other end of the connecting protrusion, and the connecting protrusion is engaged with a limit ring through the connecting rod assembly.

[0008] Furthermore: the connecting rod assembly includes a connecting rod fixedly welded to one end of the connecting protrusion, the connecting rod passes through the cleaning chamber, and one end of the connecting rod passing through the cleaning chamber is fixedly welded with a fixed connecting plate, the other end of the fixed connecting plate is rotatably matched with a rotating pull rod, and the other end of the rotating pull rod is connected to a limit stop ring.

[0009] Furthermore: the connecting pipe assembly is rotatably engaged with the pipe interface at the center position of the upper end surface of the cleaning bin through a bearing, and a rotating connecting seat for limiting the cleaning bin is fixed on the lower end surface of the pipe interface. The connecting pipe assembly is connected to the mud pump through a long pipeline, and the rotating connecting seat limits the cleaning bin.

[0010] Furthermore: the cleaning bin also includes a cleaning bin body rotatably engaged on the pipe interface, a cleaning bin bottom plate is fixedly installed on the bottom of the cleaning bin body, a plurality of drainage pipe openings are circumferentially arranged on the side wall of the cleaning bin body, a connecting pipe sleeve is fixed at the outlet of the drainage pipe opening, and the connecting pipe sleeve and the mud cleaning assembly are a matching structure, the mud pump pumps the clarified water slurry into the cleaning bin body, and under continuous pressure, water continuously flows out from the drainage pipe opening, thereby entering the mud cleaning assembly.

[0011] Furthermore: the mud cleaning assembly also includes a curved cleaning head fixedly connected to the other end of the flushing duct, a fixed connecting plate is fixed between the two side walls of the curved cleaning head, a support frame is fixed on the fixed connecting plate, a scraper for cleaning the mud on the inner wall is fixedly installed on the support frame, and a plurality of flushing holes are opened at one end of the curved cleaning head close to the inner wall of the steel casing.

[0012] Furthermore: the connecting protrusion is fixed at the middle position of the bottom of the guide plate, a waist hole is provided at one end of the connecting protrusion close to the water inlet, and the guide plate is mounted on the central guide rod through the waist hole, and multiple guide plates are arranged in a staggered manner according to height.

[0013] Furthermore: the support rod member includes a rotating support block fixed at the center position of the bottom of the bottom plate of the cleaning bin, and the first supporting bent rod and the second supporting bent rod are respectively rotatably matched on both sides of the rotating support block, and a tension spring is provided between the rod frame on the same side of the first supporting bent rod and the second supporting bent rod, and free rolling ball assemblies are provided at both ends of the first supporting bent rod and the second supporting bent rod. The first supporting bent rod and the second supporting bent rod are both three-dimensional curved tubes, and the two curved tubes are staggered to form four staggered support points. Free rolling ball assemblies are provided on the four support points. The free rolling ball assemblies can roll freely at multiple angles, and the four support points tend to expand outward under the action of the tension spring.

[0014] Furthermore: a ground contact support rod for bottoming out and limiting is fixed to the lower end surface of the rotating support block.

[0015] Furthermore: a fixing bolt for traction bolt connection is fixed on the upper end surface of the cleaning bin body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The cleaning bin and supporting rods provided in the present invention support the entire device on the inner wall of the steel casing through the supporting rods, and are connected to the mud pump through the connecting pipe assembly. The mud pump draws clarified water into the cleaning bin and discharges it through the mud cleaning assembly. The water pressure generated by the mud pump is used to discharge the liquid flow from the curved cleaning head at the front end of the mud cleaning assembly to clean the mud on the inner wall. At the same time, the reaction force is used to rotate the device, so that the scraper fixed at the front end of the mud cleaning assembly scrapes off the mud adhered to the inner wall of the steel casing. When the device rotates under the reaction force, the guide blades provided on the mud cleaning assembly are tilted and rotated inward, and the entire device is driven to move downward along the inner wall of the steel casing under the action of the water pressure, thereby effectively cleaning the mud on the inner wall of the steel casing. In this way, the mud adhered to the steel casing during hole forming can be cleaned, thereby increasing the bonding force between the concrete and the steel casing, and the restraint force of the steel casing on the concrete.

[0018] The reversing assembly provided in the present invention is used for binding the entire device with a fixing bolt when the device is used for mud cleaning. After the device is rotated and moved to the bottom of the hole, the device is pulled out of the pipe mouth by a rope. In this process, the water pressure provided by the sludge pump is used to impact multiple guide vanes, so that the guide vanes are deflected, and the guide vanes are driven to rotate through the transmission mechanism, thereby changing the deflection direction of the guide vanes. When rotating downward, the extrusion force between the guide vanes and the mud is used to make the reaction force press the entire device downward, and when the entire device is lifted, the guide vanes are driven to deflect in the opposite direction through the transmission mechanism under the support of the support spring, so that when the device is rolled up and lifted, the extrusion force of the mud on the guide vanes is used to prompt the device to rotate for mud scraping and cleaning. In this way, the inner wall of the steel casing can be repeatedly cleaned by moving up and down, thereby achieving a more thorough cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a structural schematic diagram of a device for removing mud from the inner wall of a steel casing of a bored pile according to the present invention;

[0021] Figure 2 It is a structural schematic diagram of the main structure of the cleaning bin of the present invention;

[0022] Figure 3It is a top view of a device for removing mud from the inner wall of a steel casing of a bored pile according to the present invention;

[0023] Figure 4 The present invention Figure 3 Sectional view along AA;

[0024] Figure 5 The present invention Figure 4 Magnified view of area B;

[0025] Figure 6 It is a schematic diagram of the structure inside the cleaning chamber of the present invention;

[0026] Figure 7 It is a schematic diagram of the mechanism of the mud cleaning assembly of the present invention;

[0027] Figure 8 The present invention is a schematic diagram of the working installation of a device for removing mud from the inner wall of a steel casing of a bored pile.

[0028] In the accompanying drawings: 1. connecting pipe assembly; 2. cleaning chamber; 3. mud cleaning assembly; 4. supporting rod; 5. ground-touching support rod; 11. pipe interface; 12. rotating connecting seat; 13. fixing bolt; 21. cleaning chamber body; 22. drainage pipe outlet; 23. connecting pipe sleeve; 24. reversing assembly; 25. cleaning chamber bottom plate; 31. flushing duct; 32. guide blade; 33. limit ring; 34. curved cleaning head; 35. fixed connecting plate; 36. supporting frame; 37. mud scraper; 38. flushing hole; 41. first supporting bent rod; 42. second supporting bent rod; 43. tension spring; 44. rotating support block; 45. free rolling ball assembly; 241. center guide rod; 242. supporting spring; 243. guide plate; 244. fixing rod; 245. connecting protrusion; 246. connecting rod; 247. fixed connecting plate; 248. rotating pull rod. Implementation

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0031] The present invention will be further described below in conjunction with the accompanying drawings:

[0032] like Figure 1-Figure 8 As shown, a device for removing mud from the inner wall of a bored pile steel casing comprises a cleaning chamber 2, a connecting pipe assembly 1 is provided at the center of the upper end surface of the cleaning chamber 2, a plurality of mud cleaning assemblies 3 are matched with the cleaning chamber 2 in a circumferential rotation, a supporting rod 4 for clamping the cleaning chamber 2 is provided at the bottom of the cleaning chamber 2, and the mud cleaning assembly 3 comprises a reversible guide vane 32, a flushing conduit 31 is matched with the center of the guide vane 32 in a rotational manner, one end of the flushing conduit 31 is matched with the cleaning chamber 2 in a rotational manner, and a limited stop ring 33 is fixed to one end of the guide vane 32 close to the cleaning chamber 2;

[0033] The guide blades 32 are arranged obliquely, and the device moves relative to the mud when rotating. When the guide blades 32 are inclined in the direction opposite to the rotation direction, the inclined surface of the guide blades 32 is squeezed with the mud, and the reaction force generated by the mud on the guide blades 32, the generated longitudinal component force pushes the guide blades 32 to move downward, thereby causing the entire device to move downward; when the pulling rope is used to pull the entire device out of the pile hole, the inclined guide blades 32 push the mud upward, and the reaction force formed by the mud on it is perpendicular to the inclined surface of the guide blades 32. The lateral component force generated by the reaction force pushes the guide blades 32 to move in the opposite direction, thereby driving the entire device to rotate;

[0034] As an embodiment of the present invention, Figure 4-5 As shown, the cleaning chamber 2 includes a reversing assembly 24 , and the reversing assembly 24 and the guide vane 32 are a matching mechanism. The reversing assembly 24 is arranged inside the cleaning chamber 2 , and is connected to the guide vane 32 through a transmission mechanism to control the tilt direction of the guide vane 32 .

[0035] As an embodiment of the present invention, Figure 4-6 As shown, the reversing assembly 24 includes a center guide rod 241 fixed at the center position inside the cleaning chamber 2, a plurality of guide vanes 243 are mounted on the outer wall of the center guide rod 241, a support spring 242 is provided between the guide vane 243 and the bottom of the center guide rod 241, a connecting protrusion 245 is welded to the bottom of the guide vane 243, one end of the connecting protrusion 245 is rotatably engaged with a fixing rod 244, and the fixing rod 244 is fixedly connected to the cleaning chamber 2, a connecting rod assembly is welded to the other end of the connecting protrusion 245, and the connecting protrusion 245 is engaged with the limit stop ring 33 through the connecting rod assembly.

[0036] During specific work, when it is necessary to clean the inner wall of the steel casing, the connecting pipe assembly 1 is connected to the mud pump, and the device is bolted with a steel cable. The support rod 4 is adjusted and clamped on the inner wall of the steel casing, and then the mud pump is turned on. The pressure provided by the mud pump is used to impact multiple guide vanes 243, so that one end of the guide vane 243 moves downward along the central guide rod 241, and the support spring 242 is compressed. When one end of the guide vane 243 moves downward, it rotates around the axis of the connecting protrusion 245, thereby driving the connecting rod assembly to move, and then pulling the limit stop ring 33 to make the guide vane 32 fixedly connected to the limit stop ring 33 make a corresponding deflection. The guide vane 32 deflects in the direction of rotation of the device under normal conditions. After the mud pump impacts multiple guide blades 243 to trigger their deflection, the guide blades 32 deflect in the opposite direction of the rotation direction of the device, so that the device can absorb the mud pressure during the rotation and move downward along the inner wall of the steel casing. When the device moves to the bottom of the steel casing, the mud pump stops operating and the guide blades 32 are restored to their original deflection direction with the support of the support springs 242. At this time, the bolted rope is used to reel in and lift the device. During this process, the guide blades 32 are forced to drive the device to rotate in the original rotation direction, and then the inner wall continues to be cleaned. In this way, the mud adhered to the inner wall of the steel casing can be repeatedly cleaned to avoid the influence of mud residue on the inner wall of the steel casing on the concrete pouring.

[0037] As an embodiment of the present invention, Figure 1 , 2 As shown in 6, the connecting rod assembly includes a connecting rod 246 fixedly welded to one end of the connecting protrusion 245, the connecting rod 246 passes through the cleaning chamber 2, and one end of the connecting rod 246 passing through the cleaning chamber 2 is fixedly welded with a fixed connecting plate 247, the other end of the fixed connecting plate 247 is rotatably matched with a rotating pull rod 248, the other end of the rotating pull rod 248 is connected to the limit stop ring 33, when the guide vane 243 rotates around the connecting protrusion 245, it drives the connecting protrusion 245 to rotate around its axis, thereby driving the connecting rod 246 and the fixed connecting plate 247 to rotate around the axis of the connecting protrusion 245, when the fixed connecting plate 247 rotates, the other end pulls the rotating pull rod 248, and the rotating pull rod 248 is pulled to drive the limit stop ring 33 to rotate around the flushing conduit 31, thereby causing the guide vane 32 fixedly connected to the limit stop ring 33 to rotate and change its deflection direction.

[0038] As an embodiment of the present invention, Figure 5 As shown, the connecting pipe assembly 1 is rotatably engaged with the pipe interface 11 at the center position of the upper end surface of the cleaning chamber 2 through a bearing, and the lower end surface of the pipe interface 11 is fixed with a rotating connecting seat 12 for limiting the cleaning chamber 2. The connecting pipe assembly 1 is connected to the mud pump through a long pipeline, and the rotating connecting seat 12 limits the cleaning chamber 2.

[0039] As an embodiment of the present invention, Figure 2-4As shown, the cleaning bin 2 also includes a cleaning bin body 21 rotatably engaged with the pipe interface 11, a cleaning bin bottom plate 25 is fixedly installed at the bottom of the cleaning bin body 21, a plurality of drainage pipe openings 22 are circumferentially arranged on the side wall of the cleaning bin body 21, a connecting pipe sleeve 23 is fixed at the outlet of the drainage pipe opening 22, and the connecting pipe sleeve 23 and the mud cleaning component 3 are a matching structure, the mud pump pumps the clarified water slurry into the cleaning bin body 21, and under continuous pressure, water continuously flows out from the drainage pipe opening 22, thereby entering the mud cleaning component 3.

[0040] As an embodiment of the present invention, Figure 7-8 As shown, the mud cleaning assembly 3 also includes a curved cleaning head 34 fixedly connected to the other end of the flushing conduit 31. The curved cleaning head 34 has a large inlet and a small outlet, thereby increasing the initial velocity of muddy water flowing out and increasing its cleaning ability. A fixed connecting plate 35 is fixed between the two side walls of the curved cleaning head 34. The fixed connecting plate 35 is used to support the structure of the curved cleaning head 34, making the curved cleaning head 34 more pressure-resistant. A support frame 36 is fixed on the fixed connecting plate 35, and a support frame 36 is fixedly installed with a support for cleaning the inner The scraper 37 for wall mud is a fixed blade head. Its position is set according to the inner diameter of the standard steel casing during production. A plurality of flushing holes 38 are opened at one end of the curved cleaning head 34 close to the inner wall of the steel casing. After the muddy water enters the curved cleaning head 34, it is sprayed out at an increased speed. The flushing holes 38 are directly facing the inner wall of the steel casing and are mainly used for water pressure cleaning of the inner wall of the steel casing. The tail of the curved cleaning head 34 is inclined to the inner wall of the steel casing, which is beneficial for the reaction force of the water pressure to drive the entire device to rotate, thereby utilizing the scraper 37 to clean the mud on the inner wall of the steel casing.

[0041] As an embodiment of the present invention, Figure 6 As shown, the connecting protrusion 245 is fixed at the middle position of the bottom of the guide plate 243, and a waist hole is provided at one end of the connecting protrusion 245 close to the water inlet, and the guide plate 243 is mounted on the center guide rod 241 through the waist hole. Multiple guide plates 243 are staggered in height, and the middle hole of the connecting pipe assembly 1 is opposite to the center guide rod 241. The multiple guide plates 243 do not interfere with each other. When the mud pump draws in mud and water, one end of the guide plate 243 is pressed and deviates downward along the center guide rod 241.

[0042] As an embodiment of the present invention, Figure 6As shown, the support rod 4 includes a rotating support block 44 fixed at the bottom center position of the cleaning bin bottom plate 25, and the first supporting bent rod 41 and the second supporting bent rod 42 are rotatably matched on both sides of the rotating support block 44. A tension spring 43 is provided between the rod frames on the same side of the first supporting bent rod 41 and the second supporting bent rod 42, and free rolling ball assemblies 45 are provided at both ends of the first supporting bent rod 41 and the second supporting bent rod 42. The first supporting bent rod 41 and the second supporting bent rod 42 are both three-dimensional curved tubes, and the two curved tubes are staggered to form four staggered support points. Free rolling ball assemblies 45 are provided on the four support points. The free rolling ball assemblies 45 can roll freely at multiple angles, and under the action of the tension spring 43, the four support points tend to expand outward.

[0043] During specific operation, when installing the cleaning device, the long rods of the first support bent rod 41 and the second support bent rod 42 are gathered toward the middle, so that the tension spring 43 is stretched, and at the same time, the other ends of the first support bent rod 41 and the second support bent rod 42 are rotated around the rotating support block 44 and also gathered toward the middle, so that the four fulcrums are gathered toward the center, so that the diameter of the entire device is reduced, and then it is placed into the inner wall of the steel casing. Under the action of the tension spring 43, the first support bent rod 41 and the second support bent rod 42 are reopened, and the four support points are against the inner wall of the steel casing, so that the device always maintains a horizontal state, and under the action of the free rolling ball assembly 45, the first support bent rod 41 and the second support bent rod 42 rotate together with the cleaning bin 2 in the steel casing.

[0044] As an embodiment of the present invention, Figure 2 As shown, a ground-contacting support rod 5 for bottoming out and limiting is fixed to the lower end surface of the rotating support block 44. When the device moves to the bottom of the steel casing, the ground-contacting support rod 5 touches the bottom to prevent the device from being inserted into the soil.

[0045] As an embodiment of the present invention, Figure 2 As shown, a fixing bolt 13 for traction bolt connection is fixed to the upper end surface of the cleaning bin body 21 .

[0046] The working principle and use process of the present invention are as follows: the force principle of the guide blade 32, the guide blade 32 is set at an angle, and the device moves relative to the mud when rotating. When the guide blade 32 is tilted in the opposite direction of rotation, the inclined surface of the guide blade 32 is squeezed with the mud, and the reaction force generated by the mud on the guide blade 32, the generated longitudinal component force pushes the guide blade 32 to move downward, thereby causing the entire device to move downward; when using a pulling rope to pull the entire device out of the pile hole, the inclined guide blade 32 pushes the mud upward, and the reaction force formed by the mud on it is perpendicular to the inclined surface of the guide blade 32, and the lateral component force generated by the reaction force pushes the guide blade 32 to move in the opposite direction, thereby driving the entire device to rotate.

[0047] When the inner wall of the steel casing needs to be cleaned, the connecting pipe assembly 1 is connected to the mud pump, and the fixing bolt 13 is bolted with a steel cable, and the long rods of the first support bent rod 41 and the second support bent rod 42 are gathered toward the middle, so that the tension spring 43 is stretched, and at the same time, the other ends of the first support bent rod 41 and the second support bent rod 42 are rotated around the rotating support block 44 and also gathered toward the middle, so that the four supporting points are gathered toward the center, so that the diameter of the entire device is reduced, and then it is placed into the inner wall of the steel casing, and the first support bent rod 41 and the second support bent rod 42 are reopened under the action of the tension spring 43, and the four supporting points are pressed against the inner wall of the steel casing, so that the device always maintains a horizontal state;

[0048] Then, the mud pump is turned on, and the pressure provided by the mud pump is used to impact the multiple guide vanes 243, so that one end of the guide vane 243 moves downward along the central guide rod 241, and the support spring 242 is compressed. When one end of the guide vane 243 moves downward, it rotates around the axis of the connecting protrusion 245, thereby driving the connecting rod 246 and the fixed connecting plate 247 to rotate around the axis of the connecting protrusion 245. When the fixed connecting plate 247 rotates, the other end pulls the rotating rod 248, and the rotating rod 248 is pulled to drive the limit stop ring 33 to rotate around the flushing conduit 31, so that the guide vane 32 fixedly connected to the limit stop ring 33 rotates to change its deflection direction;

[0049] The guide vanes 32 are normally deflected in the direction of rotation of the device. When the mud pump impacts multiple guide vanes 243 to trigger their deflection, the guide vanes 32 are deflected in the opposite direction of the rotation direction of the device, so that the device can absorb the mud pressure and move downward along the inner wall of the steel casing by itself during the rotation. When the device moves to the bottom of the steel casing, the mud pump stops working, and the guide vanes 32 are restored to the original deflection direction under the support of the support spring 242. At this time, the bolted rope is used to reel in and lift the device. In this process, the guide vanes 32 are driven by force to still rotate the device in the original rotation direction, and then the inner wall continues to be cleaned;

[0050] The cleaning principle of the mud cleaning component 3 is that the inlet of the curved cleaning head 34 is large and the outlet is small, thereby increasing the initial velocity of the mud and water flowing out. After the mud and water enter the curved cleaning head 34, they are sprayed out at an increased speed. The flushing hole 38 is facing the inner wall of the steel casing and is mainly used for water pressure cleaning the inner wall of the steel casing. The tail of the curved cleaning head 34 is inclined to the inner wall of the steel casing, which is beneficial to the water pressure reaction force to drive the entire device to rotate, so that the scraper 37 is used to clean the mud on the inner wall of the steel casing.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A device for removing mud from the inner wall of a bored pile steel casing, comprising a cleaning chamber (2), a connecting pipe assembly (1) being provided at the center of the upper end surface of the cleaning chamber (2), a plurality of mud cleaning assemblies (3) being rotatably matched with the cleaning chamber (2), and a supporting rod (4) for clamping the cleaning chamber (2) being provided at the bottom of the cleaning chamber (2), characterized in that: The mud cleaning assembly (3) comprises a reversible guide vane (32), the center of the guide vane (32) being rotatably engaged with a flushing conduit (31), one end of the flushing conduit (31) being rotatably engaged with the cleaning chamber (2), and a limit stop ring (33) being fixed to one end of the guide vane (32) close to the cleaning chamber (2); The cleaning chamber (2) comprises a reversing assembly (24), and the reversing assembly (24) and the guide vane (32) are a matching mechanism; The reversing assembly (24) comprises a central guide rod (241) fixed at the center position inside the cleaning chamber (2); a plurality of guide vanes (243) are sleeved on the outer wall of the central guide rod (241); a support spring (242) is provided between the guide vanes (243) and the bottom of the central guide rod (241); a connecting protrusion (245) is welded to the bottom of the guide vane (243); one end of the connecting protrusion (245) is rotatably engaged with a fixing rod (244), and the fixing rod (244) is fixedly connected to the cleaning chamber (2); a connecting rod assembly is welded to the other end of the connecting protrusion (245), and the connecting protrusion (245) is engaged with a limit stop ring (33) through the connecting rod assembly; The connecting rod assembly comprises a connecting rod (246) fixedly welded to one end of the connecting protrusion (245); the connecting rod (246) passes through the cleaning chamber (2); one end of the connecting rod (246) passing through the cleaning chamber (2) is fixedly welded with a fixed connecting plate (247); the other end of the fixed connecting plate (247) is rotatably matched with a rotating pull rod (248); the other end of the rotating pull rod (248) is connected to a limit stop ring (33); The connecting pipe assembly (1) is rotatably engaged with a pipe interface (11) at the center position of the upper end surface of the cleaning chamber (2) via a bearing, and a rotatable connecting seat (12) for limiting the position of the cleaning chamber (2) is fixed to the lower end surface of the pipe interface (11); The cleaning bin (2) further comprises a cleaning bin body (21) rotatably engaged with the pipe interface (11); a cleaning bin bottom plate (25) is fixedly mounted on the bottom of the cleaning bin body (21); a plurality of drainage pipe openings (22) are circumferentially arranged on the side wall of the cleaning bin body (21); a connecting pipe sleeve (23) is fixed at the outlet of the drainage pipe opening (22); and the connecting pipe sleeve (23) and the mud cleaning assembly (3) are a mating structure; The mud cleaning assembly (3) further comprises a curved cleaning head (34) fixedly connected to the other end of the flushing conduit (31); a fixed connecting plate (35) is fixed between the two side walls of the curved cleaning head (34); a support frame (36) is fixed on the fixed connecting plate (35); a mud scraper (37) for cleaning mud on the inner wall is fixedly mounted on the support frame (36); and a plurality of flushing holes (38) are formed at one end of the curved cleaning head (34) close to the inner wall of the steel casing.

2. A device for removing mud from the inner wall of a bored pile steel casing according to claim 1, characterized in that: The connecting protrusion (245) is fixed at the middle position of the bottom of the guide plate (243), a waist hole is provided at one end of the connecting protrusion (245) close to the water inlet, and the guide plate (243) is mounted on the central guide rod (241) through the waist hole, and the plurality of guide plates (243) are arranged in a staggered manner according to height.

3. A device for removing mud from the inner wall of a bored pile steel casing according to claim 1, characterized in that: The support rod (4) comprises a rotatable support block (44) fixed at the bottom center position of the cleaning chamber bottom plate (25), and a first support curved rod (41) and a second support curved rod (42) are rotatably matched on both sides of the rotatable support block (44). A tension spring (43) is provided between the rod frames on the same side of the first support curved rod (41) and the second support curved rod (42), and free rolling ball assemblies (45) are provided at both ends of the first support curved rod (41) and the second support curved rod (42).

4. A device for removing mud from the inner wall of a bored pile steel casing according to claim 3, characterized in that: A ground contact support rod (5) for bottom contact limiting is fixed to the lower end surface of the rotating support block (44).

5. A device for removing mud from the inner wall of a bored pile steel casing according to claim 1, characterized in that: A fixing bolt (13) for traction bolt connection is fixed to the upper end surface of the cleaning bin body (21).

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