A pile hole excavating apparatus for civil engineering

Abstract

The application belongs to the technical field of pile pit excavation, in particular to a pile pit excavation equipment for civil engineering, which comprises a square cutting head, a first cleaning assembly is arranged on the square cutting head, the first cleaning assembly is composed of an outer cleaning part and an inner cleaning part, the outer cleaning part comprises a protective shell, a plurality of displacement sleeves are slidably arranged in the protective shell, and the bottom ends of the plurality of displacement sleeves are fixed with a port-shaped scraper; the output shaft of a forward and reverse motor is rotated to drive the rotation of a rotating gear, the inner gear ring is rotated, all rotating gears are synchronously rotated, the rack is driven to move towards the direction close to the middle part of the shell, under the limiting of the limiting block sliding in the T-shaped groove, the rack drives the cleaning plate to only perform horizontal linear motion, thereby the soil attached to the bottom of the protective shell and the port-shaped scraper is cleaned, the bottom of the protective shell and the port-shaped scraper is relatively clean, and the cleaning effect of the port-shaped scraper in cleaning the outer surface of the square cutting head is further improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pile excavation, in particular to a pile excavation equipment for civil engineering. BACKGROUND

[0002] The pile excavation equipment for civil engineering is a device used for excavating a pile hole in civil engineering construction, which is used to ensure efficient and accurate completion of the work of excavating a pile hole. In excavating a pile hole, a square hole digger is usually used to excavate a square pile hole for the convenience of construction and the performance of pile foundation.

[0003] In the prior art, the square hole digger is a digger, which is equipped with a square cutting head and an auger. The auger is arranged inside the square cutting head. When the pile hole needs to be excavated, the square hole digger is moved to the predetermined excavation position so that the square cutting head tightly abuts against the ground. Then, the auger is started to generate power by rotation, and the square hole digger is pressed downward at the same time. The cutting head cuts along the preset square trajectory in the soil, and the soil is cut and discharged from the square cutting head by the contact between the auger and the soil. With the continuous rotation of the auger and the gradual deepening of the square cutting head, the soil is effectively excavated and discharged until the required hole depth and shape are reached. At this time, the auger is stopped and the square cutting head is lifted upward. When the square cutting head is removed, a pile hole is formed.

[0004] The above scheme still has some deficiencies in actual use. Since the soil is cut and discharged from the square cutting head by the rotation of the auger, the space for discharging the soil from the square cutting head is reduced with the continuous rotation of the auger and the gradual deepening of the square cutting head. At this time, the soil that has not been discharged is accumulated between the square cutting head and the auger by the rotation of the auger until the required hole depth and shape are reached. At this time, the soil that has not been discharged is compressed between the square cutting head and the auger.

[0005] After the excavation is completed, since the auger is located inside the square cutting head, the prior art cleans the soil compressed between the square cutting head and the auger by reversing the rotation of the auger so that the soil between the square cutting head and the auger is detached by the rotation of the auger and centrifugal force.

[0006] However, through the rotation of the auger and the action of centrifugal force, only most of the soil in the square cutting head can be cleaned, and the soil in the corner area of the four corners still remains, and when the square hole digger is used again to dig a pile hole, the square cutting head and the auger cut the soil again, and the soil remaining on the outside of the square cutting head increases the resistance of the cutting soil, thereby reducing the efficiency of digging the pile hole, and the soil remaining on the outside of the square cutting head is easy to cause the new pile hole wall to be uneven, thereby reducing the structural stability of the pile hole.

[0007] To this end, the present application provides a pile hole digging equipment for civil engineering. SUMMARY

[0008] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background art.

[0009] The technical scheme adopted by the present application to solve its technical problems is: the pile hole digging equipment for civil engineering, comprising a square cutting head, a first cleaning assembly is arranged on the square cutting head, the first cleaning assembly is composed of an outer cleaning part and an inner cleaning part, the outer cleaning part comprises a protective shell, a plurality of displacement sleeves are slidably arranged in the protective shell, the bottom ends of the plurality of displacement sleeves are fixedly connected with a mouth-shaped scraper, the mouth-shaped scraper is synchronously moved by the downward movement of the plurality of displacement sleeves to clean the outside of the square cutting head.

[0010] The inner cleaning part is composed of four groups of inner corner cleaning devices and a center cleaning device, each group of inner corner cleaning device is provided with a cleaning plate one, and the inside four corners of the square cutting head are cleaned by moving the cleaning plate one.

[0011] The center cleaning device is provided with a cleaning plate two, and the top of the center cleaning device is moved to the cleaning position to clean the top of the square cutting head by rotating the cleaning plate two.

[0012] Preferably, the outer cleaning part further comprises a movement groove one, a plurality of lead screws one are rotatably connected to the top of the protective shell, one lead screw one is threadedly connected with one displacement sleeve, a driving motor is fixedly connected to the top of the protective shell, a belt one is drivingly connected to the surfaces of the plurality of lead screws one on the same side, and a belt two is drivingly connected to the surfaces of the adjacent lead screws one.

[0013] Preferably, the inner corner cleaning device further comprises a movement groove two opened between the adjacent two sides of the square cutting head, a lead screw two is rotatably connected to one end of the movement groove two, a belt three is drivingly connected between the lead screw one and the lead screw two, a guide groove one is symmetrically opened in the inner wall of the movement groove two, a moving sleeve is threadedly connected to the surface of the lead screw two, limit rods are fixedly connected to the bottom of the moving sleeve, and the bottom ends of the two limit rods are fixedly connected with the cleaning plate one.

[0014] Preferably, the center cleaning device further comprises a moving groove three, the moving groove three is arranged in the top of the square cutting head, the top of the moving groove three is fixedly connected with a stepping motor, a gear rod is rotatably connected in the moving groove three, the top of the moving groove three is fixedly connected with an electric cylinder, the output end of the two electric cylinders is fixedly connected with a fixed plate, a circular ring sleeve is slidably connected in the moving groove three, and the top of the circular ring sleeve is fixedly connected with an external gear ring.

[0015] Preferably, the gear rod is composed of a rotating rod and a guide gear, the guide gear is fixed at the bottom of the rotating rod, and the output end of the stepping motor is fixed at the top of the rotating rod; when the bottom of the external gear ring is in contact with the bottom end of the moving groove three, the external gear ring is engaged with the guide gear.

[0016] Preferably, the top of the external gear ring is provided with a rotating groove, displacement blocks are symmetrically slidably connected in the rotating groove, and arc-shaped sliding rails are symmetrically arranged in the rotating groove; limit grooves are symmetrically arranged on both sides of the top of each displacement block, a plurality of rolling balls are rollingly connected in each limit groove, a fixed column is fixedly connected between the top of each displacement block and the fixed plate, and one end of the circular ring sleeve is fixedly connected with a cleaning plate two.

[0017] Preferably, the plurality of rolling balls roll between the limit grooves and the arc-shaped sliding rails.

[0018] Preferably, the protection shell is provided with a second cleaning assembly, the second cleaning assembly comprises four cleaning plates, and the soil attached to the bottom of the protection shell and the mouth-shaped scraper is cleaned by moving the cleaning plates.

[0019] Preferably, the second cleaning assembly further comprises four connecting blocks, one end of each of the four connecting blocks is fixed on the surface of the four edges of the protection shell, and the other end of each of the four connecting blocks is fixedly connected with a shell, the top of the shell is fixedly connected with a forward and reverse motor, the top of the shell is provided with an annular groove, and an internal gear ring is rotatably connected in the annular groove.

[0020] Preferably, a plurality of guide grooves two are arranged at the bottom of the shell, a rack is slidably connected in each guide groove two, the top of the rack is fixedly connected with a limiting block, the one end of the rack is fixedly connected with a cleaning plate, a rotating gear is rotatably connected in each guide groove two, the top of the rotating gear is engaged with the internal gear ring, and the bottom of the rotating gear is engaged with the rack in the guide groove two.

[0021] The beneficial effects of the present application are as follows:

[0022] 1、The present application is through displacement sleeve rotation drive mouth-shaped scraper to move down, and then to the soil on the outer surface of the square cutting head for cleaning, then through the transmission belt three drive screw two rotation, under the limiting action of guide groove one, moving sleeve moves down, the limiting rod drive cleaning plate one synchronous downward movement, so that the cleaning plate one to the square cutting head inside four corners on the residual soil cleaning, so that it no longer adhere to the square cutting head inside four corners surface, at the same time, through the extension of electric cylinder and gear rod rotation make cleaning plate two to the square cutting head in the top remaining area of residual soil cleaning, and then complete the square cutting head on the residual soil cleaning, ensure the clean of square cutting head when using again, prevent the soil left on the square cutting head will increase its cutting soil resistance, thereby reducing the efficiency of the problem of excavating pile, make the pile wall after excavation no pit, ensure the stability of the pile structure.

[0023] 2、Through the positive and negative rotation motor output shaft rotation drive rotating gear rotation, make the ring gear rotation, so that all rotating gear synchronous rotation, and then drive the rack to move towards the direction of close to the middle of the shell, under the limiting of limiting block sliding in T-shaped groove, make the rack drive cleaning plate only horizontal linear motion, and then clean the soil attached to the bottom of the protective shell and mouth-shaped scraper, make the bottom of the protective shell and mouth-shaped scraper relatively clean, further improve the cleaning effect of using mouth-shaped scraper to clean the outer surface of square cutting head again. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further described below in conjunction with the drawings.

[0025] Figure 1 is the elevation view of the overall device of the present application;

[0026] Figure 2 is the front view of the excavating part of the present application;

[0027] Figure 3 is the position relationship diagram of square cutting head and auger of the present application;

[0028] Figure 4 is the position relationship diagram of power block and protective shell of the present application;

[0029] Figure 5 is the position relationship diagram of screw one and displacement sleeve of the present application;

[0030] Figure 6 is the position relationship diagram of displacement sleeve and mouth-shaped scraper of the present application;

[0031] Figure 7 is the position relationship diagram of screw two and moving sleeve of the present application;

[0032] Figure 8This is a schematic diagram showing the positional relationship between the limiting rod and the cleaning plate of the present invention;

[0033] Figure 9 This is a schematic diagram showing the positional relationship between the square cutting head and the moving groove of the present invention;

[0034] Figure 10 This is a schematic diagram showing the positional relationship between the electric cylinder and the fixing plate of the present invention;

[0035] Figure 11 This is a schematic diagram showing the positional relationship between the circular sleeve and the external gear ring of the present invention;

[0036] Figure 12 This is a schematic diagram of the displacement block structure of the present invention;

[0037] Figure 13 This is a schematic diagram showing the positional relationship between the connecting block and the outer shell of the present invention;

[0038] Figure 14 This is a schematic diagram showing the positional relationship between the annular groove and the internal gear ring of the present invention;

[0039] Figure 15 This is a schematic diagram showing the positional relationship between the rack and the cleaning plate of the present invention;

[0040] Figure 16 For the present invention Figure 15 Enlarged diagram of point A in the middle.

[0041] Reference numerals: 1. Square cutting head; 11. Power block; 12. Spiral drill;

[0042] 21. Protective shell; 22. Motion groove one; 23. Lead screw one; 24. Displacement sleeve; 25. Orifice-shaped scraper; 26. Drive motor; 27. Belt one; 28. Belt two; 29. ​​Motion groove two; 210. Lead screw two; 211. Belt three; 212. Guide groove one; 213. Moving sleeve; 214. Limiting rod; 215. Cleaning plate one; 216. Motion groove three; 217. Stepper motor; 218. Gear rod; 219. Electric cylinder; 220. Fixing plate; 221. Circular sleeve; 222. External gear ring; 223. Rotating groove; 224. Displacement block; 225. Arc-shaped slide rail; 226. Limiting groove; 227. Ball bearing; 228. Fixing column; 229. Cleaning plate two;

[0043] 31. Connecting block; 32. Housing; 33. Forward and reverse motor; 34. Annular groove; 35. Guide groove II; 36. Rotating gear; 37. Internal gear ring; 38. Rack; 39. Limiting block; 310. Cleaning plate. Detailed Implementation

[0044] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Embodiment

[0045] As Figures 1 to 16 shown, a pile hole digging equipment for civil engineering of an embodiment of the application, including square cutting head 1, square cutting head 1 is provided with first cleaning assembly, first cleaning assembly is composed of outer cleaning component and inner cleaning component, outer cleaning component includes protective shell 21, a plurality of displacement sleeves 24 are slidably arranged in protective shell 21, the bottom end of the plurality of displacement sleeves 24 is fixed with the mouth-shaped scraper 25, the downward movement of the plurality of displacement sleeves 24 drives the synchronous movement of the mouth-shaped scraper 25, and the outside of the square cutting head 1 is cleaned;

[0046] The inner cleaning component is composed of four groups of inner corner cleaning devices and a central cleaning device, each group of inner corner cleaning device is provided with a cleaning plate one 215, and the four corners inside the square cutting head 1 are cleaned by moving the cleaning plate one 215;

[0047] The central cleaning device is provided with a cleaning plate two 229, when the central cleaning device moves to the cleaning position, the top inside the square cutting head 1 is cleaned by rotating the cleaning plate two 229.

[0048] Specifically, the protective shell 21 is fixed on the top of the square cutting head 1, the protective shell 21 is provided with a power block 11 on the top, the square cutting head 1 is provided with a spiral drill 12 inside, the power block 11 drives the spiral drill 12 to rotate, and the plurality of displacement sleeves 24 are arranged in rectangular array;

[0049] The above scheme still has some deficiencies in actual use, through the rotation of the spiral drill 12 and the action of centrifugal force, only most of the soil inside the square cutting head 1 can be cleaned, and the soil in the four corner regions still remains, when the square hole digging machine is used again to dig a pile hole, the square cutting head 1 and the spiral drill 12 cut the soil again, and the soil remaining outside the square cutting head 1 increases the resistance of cutting the soil, thereby reducing the efficiency of digging the pile hole, at the same time, the soil remaining outside the square cutting head 1 can produce friction with the soil on the inner wall of the new pile hole in the cutting process, which is easy to cause the inner wall of the new pile hole to be dented, thereby reducing the structural stability of the pile hole.

[0050] Therefore, the present application solves the problem by setting corresponding structure, after the end of excavating pile hole, first cutting head 1 is cut oblique, then through the power block 11 makes the screw drill 12 reverse rotation, through the rotation of the screw drill 12 and the centrifugal force, the most soil in the square cutting head 1 falls, then through the outside cleaning component, the downward movement of multiple displacement sleeve 24, so that the mouth-shaped scraper 25 moves down, the soil attached to the outside of the square cutting head 1 is cleaned, and through four groups of inner corner cleaning devices, the cleaning plate one 215 cleans the residual soil on the four corners inside the square cutting head 1, and through the central cleaning device, the cleaning plate two 229 rotates, and then the residual soil on the top of the square cutting head 1 is cleaned, so that the residual soil on the square cutting head 1 is cleaned more thoroughly. Embodiment

[0051] As Figures 2 to 16 shown, the present application has another embodiment:

[0052] As Figures 2 to 6 shown, the present application has another embodiment: Figure 8 As shown in the figure, the outside cleaning component of the embodiment of the present application further comprises a movement groove one 22, a plurality of lead screws one 23 are rotationally connected to the top of the protective shell 21, one lead screw one 23 is threadedly connected with one displacement sleeve 24, a driving motor 26 is fixedly connected to the top of the protective shell 21, a belt one 27 is drivingly connected to the surfaces of the plurality of lead screws one 23 on the same side, and a belt two 28 is drivingly connected to the surfaces of the adjacent lead screws one 23.

[0053] Specifically, the movement groove one 22 is formed on the protective shell 21, and the plurality of lead screws one 23 are arranged in a rectangular array, each lead screw one 23 corresponds to a displacement sleeve 24 below it, the displacement sleeve 24 slides in the movement groove one 22, and the output end of the driving motor 26 is fixed to the top of one lead screw one 23.

[0054] The displacement sleeve 24 is composed of a rectangular sleeve and a T-shaped sliding block, the T-shaped sliding block is composed of a horizontal block and a vertical block, the T-shaped sliding block is fixed to one side of the surface of the rectangular sleeve, the movement groove one 22 is T-shaped and is composed of a horizontal groove and a vertical groove, the horizontal groove is communicated with the vertical groove, the horizontal block slides in the horizontal groove, and when the lead screw one 23 rotates, the displacement sleeve 24 can only move vertically and linearly through the limiting of the movement groove one 22, until the displacement sleeve 24 slides to the bottom end of the horizontal groove of the movement groove one 22, at which time the displacement sleeve 24 stops moving.

[0055] Initially, the mouth-shaped scraper 25 is located between the square cutting head 1 and the protective shell 21, the thickness of the mouth-shaped scraper 25 is the same as the distance between the square cutting head 1 and the protective shell 21, the bottom of the mouth-shaped scraper 25 is in the same plane as the bottom of the protective shell 21, and the belt two 28 penetrates the inside of the square cutting head 1.

[0056] When the auger 12 reverses rotation, the driving motor 26 is started at this time, the screw rod one 23 fixed therewith is rotated, all screw rods one 23 are synchronously rotated through the transmission of the belt one 27 and the belt two 28, all displacement sleeves 24 are synchronously moved downwards along with the rotation of the screw rod one 23, so that the mouth-shaped scraper 25 is moved downwards, and then the soil on the outer surface of the square cutting head 1 is cleaned.

[0057] After cleaning, the driving motor 26 is reversely rotated, through the above operation, the mouth-shaped scraper 25 is retracted into the protective shell 21, the bottom of the mouth-shaped scraper 25 is in the same plane with the bottom of the protective shell 21, at this time, when the mouth-shaped scraper 25 scrapes the soil on the outer surface of the square cutting head 1, the soil attached to the surface thereof is scraped by the bottom of the protective shell 21.

[0058] As shown in Figure 4 With Figures 6 to 8 It is shown that the inner corner cleaning device in the embodiment of the application further comprises a movement groove two 29 arranged between two adjacent sides of the square cutting head 1, one end of the movement groove two 29 is rotationally connected with a screw rod two 210, a belt three 211 is transmissionally connected between the screw rod one 23 and the screw rod two 210, a guide groove one 212 is symmetrically arranged on the inner wall of the movement groove two 29, a moving sleeve 213 is threadedly connected to the surface of the screw rod two 210, limit rods 214 are fixedly connected to the bottom of the moving sleeve 213 in a symmetrical manner, and cleaning plates one 215 are fixedly connected to the bottom ends of the two limit rods 214;

[0059] It should be noted that: an annular groove is arranged at the upper portion of the movement groove two 29, an annular block is arranged at the top of the screw rod two 210, the annular block at the top of the screw rod two 210 is rotationally connected in the annular groove at the upper portion of the movement groove two 29, and the annular block is supported and stabilized by the annular groove, so that the screw rod two 210 rotates in the movement groove two 29 based on the annular block.

[0060] Specifically, the moving sleeve 213 slides on the guide groove one 212, when the screw rod two 210 rotates, the moving sleeve 213 can only move vertically and linearly under the limiting action of the guide groove one 212, so as to synchronously move the cleaning plates one 215 through the limit rods 214;

[0061] Initially, the shapes of the four cleaning plates one 215 are matched with the shapes of the four corners inside the square cutting head 1, the bottom of the cleaning plates one 215 is in the same horizontal plane with the top inside the square cutting head 1, and the four cleaning plates one 215 and the top inside the square cutting head 1 form a rectangular plane.

[0062] While the lead screw 23 rotates, the lead screw 210 is driven to rotate by the belt 211. Under the limiting action of the guide groove 212, the moving sleeve 213 moves downward, causing the limiting rod 214 to drive the cleaning plate 215 to move downward synchronously, so that the cleaning plate 215 cleans the soil remaining on the four corners inside the square cutting head 1, so that it no longer adheres to the surface of the four corners inside the square cutting head 1.

[0063] When the lead screw 23 rotates in the reverse direction, the cleaning plate 215 is reset through the above operation.

[0064] like Figures 9 to 12 As shown, the core cleaning device in this embodiment of the invention further includes a motion groove 216, which is formed at the top of the square cutting head 1. A stepper motor 217 is fixedly connected to the top of the motion groove 216, a gear rod 218 is rotatably connected inside the motion groove 216, electric cylinders 219 are symmetrically fixedly connected to the top of the motion groove 216, and a fixing plate 220 is fixedly connected to the output end of the two electric cylinders 219. A circular ring 221 is slidably connected inside the motion groove 216, and an external gear ring 222 is fixedly connected to the top of the circular ring 221.

[0065] The gear rod 218 consists of a rotating rod and a guide gear. The guide gear is fixed at the bottom of the rotating rod, and the output end of the stepper motor 217 is fixed at the top of the rotating rod. When the bottom of the outer gear ring 222 contacts the bottom end of the motion groove 216, the outer gear ring 222 meshes with the guide gear.

[0066] The top of the external gear ring 222 is provided with a rotating groove 223. Displacement blocks 224 are symmetrically slidably connected in the rotating groove 223. Arc-shaped slide rails 225 are symmetrically provided in the rotating groove 223. Limiting grooves 226 are symmetrically provided on both sides of the top of each displacement block 224. Multiple balls 227 are slidably connected in each limiting groove 226. The multiple balls 227 roll between the limiting groove 226 and the arc-shaped slide rail 225. A fixing post 228 is fixedly connected between the top of each displacement block 224 and the fixing plate 220. A cleaning plate 229 is fixedly connected to one end of the ring sleeve 221.

[0067] Specifically, the annular sleeve 221 and the external gear ring 222 both slide on the surface of the auger drill 12. The displacement block 224 is composed of a wide circular arc groove and a narrow circular arc groove. The wide circular arc groove is below the narrow circular arc groove and they are interconnected. The cleaning plate 229 has the same height as the annular sleeve 221.

[0068] At the beginning, the displacement block 224 slides in the wide circular arc groove, and the fixed column 228 is fixed between the displacement block 224 and the fixed plate 220, at this time, the outer gear ring 222 and the fixed plate 220 are in a relatively fixed state, the electric cylinder 219 is in a contraction state, at this time, the outer gear ring 222 is located above the gear rod 218, the bottom of the circular ring sleeve 221 and the top surface of the square cutting head 1 are in the same plane, and the bottom of the cleaning plate two 229 and the top surface of the square cutting head 1 are in the same plane;

[0069] At the same time of starting the driving motor 26, the electric cylinder 219 is started to extend, thereby driving the fixed plate 220 to move downward, the outer gear ring 222 moves synchronously with the fixed plate 220, the circular ring sleeve 221 and the cleaning plate two 229 move downward synchronously with the outer gear ring 222, until the output end of the electric cylinder 219 extends to the maximum distance, at this time, the outer gear ring 222 and the bottom of the movement groove three 216 are in contact, at this time, the guide gear on the gear rod 218 and the outer gear ring 222 are in meshing state;

[0070] Then, the step motor 217 is started to rotate the output end, thereby driving the gear rod 218 to rotate, the outer gear ring 222 is driven to rotate by the rotation of the gear rod 218, under the action that the ball 227 rolls in the arc-shaped slide rail 225 and the displacement block 224 slides in the rotating groove 223, the abrasion of the displacement block 224 due to sliding is reduced, at the same time, only the outer gear ring 222 rotates, thereby driving the cleaning plate two 229 to rotate synchronously, thereby cleaning the residual soil in the remaining area of the top of the square cutting head 1;

[0071] When the driving motor 26 reversely rotates, the cleaning plate two 229 is rotated to the initial position, and then the step motor 217 is closed, at this time, the cleaning plate two 229 does not rotate, then the electric cylinder 219 is contracted, through the above operation, the output end of the electric cylinder 219 is reset, thereby resetting the cleaning plate two 229.

[0072] The application drives the mouth-shaped scraper 25 to move downwards through the rotation of the displacement sleeve 24, and then drives the screw rod 210 to rotate through the transmission of the belt 211, and under the limiting action of the guide groove 212, the moving sleeve 213 moves downwards, the limiting rod 214 drives the cleaning plate 215 to move downwards synchronously, so that the cleaning plate 215 cleans the residual soil on the four corners inside the square cutting head 1, and the residual soil on the top of the square cutting head 1 is cleaned by the cleaning plate 229 through the extension of the electric cylinder 219 and the rotation of the gear rod 218, and then the cleaning of the residual soil on the square cutting head 1 is completed, the cleanliness of the square cutting head 1 is ensured when it is used again, the problem that the residual soil on the square cutting head 1 increases the cutting resistance of the soil is solved, the efficiency of digging the pile hole is improved, and the inner wall of the pile hole after excavation is smooth, and the stability of the pile hole structure is ensured.

[0073] As Figure 2 , Figure 3 With Figures 13 to 16 As shown in the drawings, the second cleaning assembly is arranged on the protective shell 21, and the second cleaning assembly comprises four cleaning plates 310.

[0074] The second cleaning assembly further comprises four connecting blocks 31, one end of each of the four connecting blocks 31 is fixed on the surface of the four edges of the protective shell 21, and the other end is fixedly connected with an outer shell 32.

[0075] A plurality of guide grooves 35 are formed in the bottom of the outer shell 32, a rack 38 is slidably connected in each guide groove 35, a limiting block 39 is fixedly connected to the top of the rack 38, the cleaning plate 310 is fixedly connected to one end of the rack 38, and a rotating gear 36 is rotatably connected in each guide groove 35.

[0076] Specifically, the connecting block 31 is located above the cleaning plate 310, the top of the cleaning plate 310 is in the same horizontal plane as the bottom of the protective shell 21, and the limiting block 39 is used to assist the rack 38 to only move linearly, and further make the cleaning plate 310 only move linearly.

[0077] The output end of the reversible motor 33 is fixed to the top of one rotating gear 36, the guide groove 35 is composed of a contraction groove and a moving groove, and the contraction groove is in communication with the moving groove.

[0078] The shape of the contraction groove matches the shape of the cleaning plate 310, the cleaning plate 310 is located at the bottom of the shell 32, the moving groove is composed of a "worker" groove and a cylindrical groove, the cylindrical groove is connected with the annular groove 34, the shape of the cylindrical groove matches the shape of the rotating gear 36, and the "worker" groove and the cylindrical groove are connected;

[0079] The "worker" groove is composed of a T-shaped groove and a transverse groove, the shape of the T-shaped groove matches the shape of the limiting block 39, and the shape of the transverse groove matches the shape of the rack 38;

[0080] Initially, the cleaning plate 310 is retracted in the contraction groove, when the mouth-shaped scraper 25 is retracted into the protective shell 21, at this time, the forward and reverse motor 33 is started, the rotating gear 36 is driven to rotate through the output shaft of the forward and reverse motor 33, the inner gear ring 37 is driven to rotate, all rotating gears 36 are synchronously rotated, and the rack 38 is driven to move towards the middle part of the shell 32, under the limiting of the limiting block 39 sliding in the T-shaped groove, the rack 38 drives the cleaning plate 310 to only perform horizontal linear motion, and then the soil attached to the bottom of the protective shell 21 and the mouth-shaped scraper 25 is cleaned, the bottom of the protective shell 21 and the mouth-shaped scraper 25 is relatively clean, and the cleaning effect of the mouth-shaped scraper 25 on the outer surface of the square cutting head 1 is further improved;

[0081] After cleaning is completed, the forward and reverse motor 33 is reversely rotated, and the cleaning plate 310 is reset through the above operation.

[0082] Working principle:

[0083] After the pile hole is excavated, the square cutting head 1 needs to be cleaned at this time, during cleaning, the square cutting head 1 is first cut obliquely, then the spiral drill 12 is reversely rotated through the power block 11, and most of the soil in the square cutting head 1 is dropped through the rotation of the spiral drill 12 and the centrifugal force;

[0084] At this time, the driving motor 26 is started to rotate the lead screw one 23 fixed therewith, all lead screws one 23 are synchronously rotated through the transmission of the belt one 27 and the belt two 28, all displacement sleeves 24 are synchronously moved downward along with the rotation of the lead screw one 23, the mouth-shaped scraper 25 is moved downward, and then the soil on the outer surface of the square cutting head 1 is cleaned;

[0085] At the same time that the lead screw one 23 rotates, the lead screw two 210 is driven to rotate through the transmission of the belt three 211, under the limiting action of the guide groove one 212, the moving sleeve 213 moves downward, the limiting rod 214 drives the cleaning plate one 215 to synchronously move downward, so that the cleaning plate one 215 cleans the soil remaining on the four corners inside the square cutting head 1, so that the soil no longer adheres to the surface of the four corners inside the square cutting head 1;

[0086] At the same time of starting the driving motor 26, the electric cylinder 219 is started to extend, thus driving the fixed plate 220 to move downward, driving the outer gear ring 222 to move synchronously with the fixed plate 220, driving the circular ring 221 and the cleaning plate 229 to move synchronously with the outer gear ring 222 downward, until the output end of the electric cylinder 219 extends to the maximum distance, at this time, the outer gear ring 222 is in contact with the bottom of the moving groove 216, at this time, the guide gear on the gear rod 218 is in meshing state with the outer gear ring 222;

[0087] Then the step motor 217 is started to rotate the output end, thus driving the gear rod 218 to rotate, driving the outer gear ring 222 to rotate through the rotation of the gear rod 218, under the action of the ball 227 rolling in the arc-shaped slide rail 225 and the displacement block 224 sliding in the rotating groove 223, the abrasion of the displacement block 224 caused by sliding is reduced, at the same time, only the outer gear ring 222 rotates, thus driving the cleaning plate 229 to rotate synchronously, thus cleaning the residual soil in the remaining area on the top of the square cutting head 1;

[0088] Through the above operation, the residual soil on the square cutting head 1 is cleaned more thoroughly, after the cleaning is completed, the driving motor 26 is reversed, through the above operation, at this time, the cleaning plate 215 is reset, the mouth-shaped scraper 25 is retracted into the protective shell 21, thus the bottom of the mouth-shaped scraper 25 is in the same plane with the bottom of the protective shell 21, at this time, when the mouth-shaped scraper 25 scrapes the soil on the surface of the square cutting head 1, the soil attached to the surface is scraped by the bottom of the protective shell 21;

[0089] At the same time of reversing the driving motor 26, the cleaning plate 229 is rotated to the initial position, then the step motor 217 is turned off, at this time, the cleaning plate 229 no longer rotates, then the electric cylinder 219 is retracted, through the above operation, the output end of the electric cylinder 219 is reset, thus the cleaning plate 229 is reset;

[0090] When the mouth-shaped scraper 25 is retracted into the protective shell 21, at this time, the forward and reverse motor 33 is started, the rotation of the output shaft of the forward and reverse motor 33 drives the rotating gear 36 to rotate, thus driving the inner gear ring 37 to rotate, thus driving all the rotating gears 36 to rotate synchronously, thus driving the rack 38 to move towards the middle part of the outer shell 32, under the limiting of the limiting block 39 sliding in the T-shaped groove, the rack 38 drives the cleaning plate 310 to move only horizontally and linearly, thus cleaning the soil attached to the bottom of the protective shell 21 and the mouth-shaped scraper 25.

[0091] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A pile pit excavation device for civil engineering, comprising a square cutting head (1), characterized in that: The square cutting head (1) is provided with a first cleaning component, which consists of an outer cleaning component and an inner cleaning component. The outer cleaning component includes a protective shell (21). Multiple displacement sleeves (24) are slidably disposed inside the protective shell (21). The bottom ends of the multiple displacement sleeves (24) are fixed to the mouth-shaped scraper (25). The downward movement of the multiple displacement sleeves (24) drives the mouth-shaped scraper (25) to move synchronously, thereby cleaning the outer side of the square cutting head (1). The internal cleaning component consists of four sets of internal corner cleaning devices and a central cleaning device. Each set of internal corner cleaning devices is equipped with a cleaning plate (215). The internal corners of the square cutting head (1) are cleaned by moving the cleaning plate (215). The central cleaning device is equipped with a second cleaning plate (229). When the central cleaning device moves to the cleaning position, it cleans the top of the square cutting head (1) by rotating the second cleaning plate (229). The central cleaning device also includes a three-stage motion groove (216), which is located at the top of the square cutting head (1). A stepper motor (217) is fixedly connected to the top of the three-stage motion groove (216). A gear rod (218) is rotatably connected inside the three-stage motion groove (216). Electric cylinders (219) are symmetrically fixedly connected to the top of the three-stage motion groove (216). A fixing plate (220) is fixedly connected to the output end of the two electric cylinders (219). A circular ring (221) is slidably connected inside the three-stage motion groove (216). An external gear ring (222) is fixedly connected to the top of the circular ring (221). The gear rod (218) is composed of a rotating rod and a guide gear. The guide gear is fixed at the bottom of the rotating rod. The output end of the stepper motor (217) is fixed to the top of the rotating rod. When the bottom of the outer gear ring (222) contacts the bottom end of the motion groove three (216), the outer gear ring (222) meshes with the guide gear. The top of the external gear ring (222) is provided with a rotating groove (223), and a displacement block (224) is symmetrically slidably connected in the rotating groove (223). An arc-shaped slide rail (225) is symmetrically provided in the rotating groove (223). Each displacement block (224) has a limit groove (226) symmetrically provided on both sides of its top. Multiple balls (227) are slidably connected in each limit groove (226). A fixing post (228) is fixedly connected between the top of each displacement block (224) and the fixing plate (220). A cleaning plate (229) is fixedly connected to one end of the ring sleeve (221). Multiple balls (227) roll between the limiting groove (226) and the arc-shaped slide rail (225); The protective shell (21) is provided with a second cleaning component, which includes four cleaning plates (310). By moving the cleaning plates (310), the soil attached to the bottom of the protective shell (21) and the mouth-shaped scraper (25) is cleaned. The second cleaning component also includes four connecting blocks (31), one end of each of the four connecting blocks (31) is fixed to the four sides of the protective shell (21), and the other end is fixedly connected to the outer shell (32). A forward and reverse motor (33) is fixedly connected to the top of the outer shell (32), and an annular groove (34) is opened on the top of the outer shell (32). An internal gear ring (37) is rotatably connected in the annular groove (34). The bottom of the outer shell (32) is provided with multiple guide grooves (35), and a rack (38) is slidably connected in each guide groove (35). A limit block (39) is fixedly connected to the top of the rack (38), and a cleaning plate (310) is fixedly connected to one end of the rack (38). A rotating gear (36) is rotatably connected in each guide groove (35). The top of the rotating gear (36) meshes with the inner gear ring (37), and the bottom of the rotating gear (36) meshes with the rack (38) in the guide groove (35) where it is located.

2. The pile pit excavation equipment for civil engineering according to claim 1, characterized in that, The outer cleaning component also includes a motion groove (22), and multiple lead screws (23) are rotatably connected to the top of the inner shell (21). One lead screw (23) is threadedly connected to a displacement sleeve (24). A drive motor (26) is fixedly connected to the top of the inner shell (21). Belts (27) are driven to the surface of multiple lead screws (23) on the same side, and belts (28) are driven to the surface of lead screws (23) on adjacent sides.

3. The pile pit excavation equipment for civil engineering according to claim 1, characterized in that, The inner corner cleaning device also includes a second motion groove (29) opened between two adjacent sides of the square cutting head (1). One end of the second motion groove (29) is rotatably connected to a second lead screw (210). A third belt (211) is connected between a first lead screw (23) and the second lead screw (210). A guide groove (212) is symmetrically opened on the inner wall of the second motion groove (29). A movable sleeve (213) is threadedly connected to the surface of the second lead screw (210). A limit rod (214) is symmetrically fixedly connected to the bottom of the movable sleeve (213). A cleaning plate (215) is fixedly connected to the bottom of the two limit rods (214).

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