A pouring device for cast-in-place piles

Abstract

The present invention discloses a casting device for cast-in-place piles, which includes a platform formwork and a positioning formwork installed on the platform formwork. The platform formwork includes a platform plate arranged above the pile foundation hole. A plurality of groups of support members are installed on the bottom surface of the platform plate. The support members include a fixed pipe fixed on the platform plate and a threaded rod slidably arranged in the fixed pipe. An adjusting sleeve is rotatably arranged on the fixed pipe. The adjusting sleeve is sleeved on the threaded rod, and the adjusting sleeve is threadedly connected to the threaded rod. A limiting mechanism is arranged between the threaded rod and the fixed pipe to prevent the threaded rod and the adjusting sleeve from rotating synchronously. This application has the effect of improving the stability of the platform formwork, thereby improving the positioning accuracy of the steel reinforcement cage.

Description

Technical Field

[0001] The present invention relates to the field of auxiliary equipment for pile foundation pouring, and particularly to a pouring device for cast-in-place piles. Background Art

[0002] Pile foundation is a commonly used foundation form in high-rise buildings, industrial plants, multi-story buildings on soft foundations, bridge engineering, etc. It has the characteristics of high bearing capacity, good stability, fast settlement stability, strong anti-vibration ability, and strong adaptability. The pile foundation is at the bottom layer of the project, and the positioning accuracy of the pile foundation steel cage will directly affect the overall quality of the construction project. During the pouring of the pile foundation, a concrete pouring platform is usually used to position the steel cage.

[0003] In the related art, the Chinese utility model patent with the publication number CN211571690U discloses a positioning device for improving the positioning accuracy of pile foundation steel cages, including a support platform that can be placed on the pile foundation casing and a positioning platform for positioning the steel cage. The support platform includes a support platform plate with a double-layer plate structure and N support clamping plates movably connected to the support platform plate. A through hole with a diameter consistent with that of the steel cage is provided on the support platform plate. The support clamping plates extend from the outside of the support platform plate into the through hole, and the N support clamping plates are distributed along the circumference of the through hole. The positioning platform includes a positioning platform plate that can be placed on multiple support clamping plates. A circular positioning through hole is provided on the positioning platform plate, and at least two stirrup positioning holes for connecting stirrups are distributed along the circumference of the positioning through hole on the positioning platform plate.

[0004] In view of the above related art, at the construction site, the flatness of the bottom surface around the orifice of the pile foundation hole is often not high. When placing the platform formwork on the ground at the orifice of the pile foundation hole, it is difficult to adjust the platform formwork to a stable state. When the platform formwork is unstable, under the action of external forces, the positioning formwork installed on the platform formwork will shake accordingly, thereby reducing the positioning accuracy of the steel cage and the overall quality of the pile foundation. Summary of the Invention

[0005] In order to improve the stability of the platform formwork and thus improve the positioning accuracy of the steel cage, the present application provides a pouring device for cast-in-place piles.

[0006] The pouring device for cast-in-place piles provided by the present application adopts the following technical solutions:

[0007] A pouring device for cast-in-place piles, comprising a platform formwork and a positioning formwork installed on the platform formwork. The platform formwork includes a platform plate arranged above the pile foundation hole. A plurality of groups of support members are installed on the bottom surface of the platform plate. The support member includes a fixed pipe fixed on the platform plate and a threaded rod slidably arranged in the fixed pipe. An adjusting sleeve is rotatably arranged on the fixed pipe. The adjusting sleeve is sleeved on the threaded rod, and the adjusting sleeve is threadedly connected with the threaded rod. A limiting mechanism is arranged between the threaded rod and the fixed pipe to prevent the threaded rod and the adjusting sleeve from rotating synchronously.

[0008] By adopting the above technical solution, the fixed pipe is fixedly connected to the platform plate, the adjusting sleeve is rotatably arranged on the fixed pipe, the threaded rod is slidably arranged in the fixed pipe, and the threaded rod is threadedly connected with the adjusting sleeve. Under the blocking action of the limiting mechanism, when the adjusting sleeve is rotated, the threaded rod can move along the axial direction of the fixed pipe, so that the threaded rod can move away from the platform plate, enabling the support member to adjust the position of the threaded rod in the fixed pipe when the flatness of the bottom surface around the orifice of the pile foundation hole is not high, so that the bottom of each support member can be in contact with the ground, thereby improving the stability of the platform formwork and thus improving the positioning accuracy of the steel reinforcement cage.

[0009] Preferably, a driving device is arranged on the platform plate. The driving device includes a rotating ring rotatably arranged on the platform plate. A first bevel gear is coaxially installed on the rotating ring. Second bevel gears for driving the adjusting sleeve to rotate are arranged on the adjusting sleeves. The second bevel gears can be meshed with the first bevel gear. The second bevel gears are slidably arranged on the adjusting sleeves. The adjusting sleeves are further provided with a thrust mechanism for pushing the second bevel gears towards the first bevel gear and a pulling mechanism for pulling the second bevel gears away from the first bevel gear when the bottom of the support member abuts against the ground. The driving device further includes a driving mechanism for driving the rotating ring to rotate.

[0010] By adopting the above technical solution, the rotating ring is rotatably arranged on the platform plate, and the first bevel gear is installed on the rotating ring. When the driving mechanism drives the rotating ring to rotate, the rotating ring can drive the first bevel gear to rotate. When the bottom of the support member does not contact the ground, the thrust of the thrust mechanism can keep the second bevel gear and the first bevel gear meshed. When the bottom of the support member abuts against the ground, the pulling mechanism can pull the second bevel gear away from the first bevel gear, so that when the driving mechanism drives the rotating ring to rotate, the first bevel gear can simultaneously drive the second bevel gears on the support members whose bottoms do not contact the ground to rotate, so that the threaded rods in the support rods whose bottoms do not contact the ground can approach the ground until they are in contact with the ground.

[0011] Preferably, the pulling mechanism includes an attracting block fixedly connected to the second bevel gear. A fixing member is installed on the adjusting sleeve. An installation groove is formed on the side surface of the fixing member close to the second bevel gear, and an electromagnet capable of generating an attractive force on the attracting block is installed in the installation groove.

[0012] By adopting the above technical solution, the attracting block is fixedly connected to the second bevel gear, the fixing member is installed on the adjusting sleeve, and the electromagnet is fixed in the installation groove. When the electrical circuit of the electromagnet is conducted, the electromagnet can generate an attractive force on the attracting block, so that the attracting block drives the second bevel gear to slide away from the first bevel gear against the thrust of the thrust mechanism, and the second bevel gear is disengaged from the first bevel gear.

[0013] Preferably, a bearing plate is fixedly connected to the bottom surface of the threaded rod. A sliding groove is formed on the bottom surface of the bearing plate. The pulling mechanism further includes a triggering component. The triggering component includes a triggering block slidably disposed in the sliding groove. A fixed contact is fixedly connected to the top wall of the sliding groove. A moving contact for contacting the fixed contact is fixedly connected to the top surface of the triggering block. A power source is fixedly connected to the platform plate. One of the electrodes of the power source is electrically connected to the moving contact, and the other electrode of the power source is electrically connected to one end of the internal coil of the electromagnet. The other end of the internal coil of the electromagnet is electrically connected to the fixed contact.

[0014] By adopting the above technical solution, as the threaded rod moves towards the ground, when the bottom surface of the triggering block touches the ground, as the threaded rod continues to move towards the ground, the triggering block slides into the sliding groove under the action of the contact with the ground. When the moving contact contacts the fixed contact, the electrical circuit of the electromagnet is conducted. Thus, when the bottom of the support member touches the ground, the electrical circuit of the electromagnet can be automatically conducted and pull the second bevel gear to slide away from the first bevel gear, so that the second bevel gear is disengaged from the first bevel gear.

[0015] Preferably, a blocking groove is formed on the side wall of the sliding groove. A blocking block is fixedly connected to the side surface of the triggering block. The blocking block is slidably disposed in the blocking groove. A first spring is disposed in the installation groove. One end of the first spring abuts against the top wall of the sliding groove, and the other end of the first spring abuts against the top surface of the triggering block.

[0016] By adopting the above technical solution, the blocking block is slidably disposed in the blocking groove, so that the triggering block can be stably slidably disposed in the sliding groove; one end of the first spring abuts against the top wall of the sliding groove, and the other end of the first spring abuts against the top surface of the triggering block. Under the elastic force of the first spring, the possibility of accidental contact between the moving contact and the fixed contact is reduced, and the stability of the structure of the triggering component is improved.

[0017] Preferably, the thrust mechanism is disposed between the fixing member and the second bevel gear. The thrust mechanism includes a telescopic rod fixedly connected to the fixing member at one end and a second spring sleeved outside the telescopic rod. The end of the telescopic rod away from the fixing member is fixedly connected to the second bevel gear. One end of the second spring abuts against the fixing member, and the other end of the second spring abuts against the second bevel gear.

[0018] By adopting the above technical solution, the second spring is sleeved outside the telescopic rod. One end of the second spring abuts against the fixing member, and the other end of the second spring abuts against the second bevel gear, so that the second bevel gear meshes with the first bevel gear under the elastic force of the second spring.

[0019] Preferably, a strip-shaped groove is formed in the adjusting sleeve. The length direction of the strip-shaped groove is parallel to the axial line direction of the fixed tube. A convex block is fixedly connected to the second bevel gear, and the convex block is slidably disposed in the strip-shaped groove.

[0020] By adopting the above technical solution, the strip-shaped groove is formed in the adjusting sleeve, and the convex block is slidably disposed in the strip-shaped groove, so that the second bevel gear can be stably slidably disposed on the adjusting sleeve.

[0021] Preferably, an annular slide rail is installed on the platform plate. A slider is fixedly connected to the rotating ring, and the slider is slidably disposed on the annular slide rail. The driving mechanism includes a motor installed on the platform plate and a driving gear coaxially and fixedly connected to the output shaft of the motor. A driven gear with a rotation axis coinciding with the rotation axis of the rotating ring is installed on the inner peripheral wall of the rotating ring, and the driving gear meshes with the driven gear.

[0022] By adopting the above technical solution, the driven gear is installed on the inner peripheral wall of the rotating ring. The driving gear fixed to the output shaft of the motor meshes with the driven gear. When the motor is started, the driving gear can drive the driven gear to rotate, so that the driven gear drives the first bevel gear to rotate through the rotating ring.

[0023] Preferably, a limiting groove is formed in the inner wall of the fixed tube. The length direction of the limiting groove is parallel to the axial line direction of the fixed tube. The limiting mechanism includes a limiting block fixedly connected to the threaded rod, and the limiting block is slidably disposed in the limiting groove.

[0024] By adopting the above technical solution, the limiting groove is formed in the inner peripheral wall of the fixed tube. The limiting block is fixedly connected to the threaded rod, and the limiting block is slidably disposed in the limiting groove, thereby preventing the threaded rod from rotating synchronously with the adjusting sleeve of the fixed tube.

[0025] Preferably, a limiting ring groove is provided on the outer circumferential surface of the fixed tube, a clearance groove is provided on the end surface of the adjustment sleeve close to the platform plate, the end of the fixed tube away from the platform plate is inserted into the clearance groove, a sliding block is fixedly connected to the inner circumferential wall of the clearance groove, and the sliding block is slidably set in the limiting ring groove.

[0026] By adopting the above technical solution, a clearance groove is opened on the end surface of the adjustment sleeve close to the platform plate, the fixed tube is inserted into the clearance groove, a limiting ring groove is opened on the fixed tube, the sliding block is fixedly connected to the inner wall of the clearance groove, and the sliding block is slidably set in the limiting ring groove, so that the adjustment sleeve can be stably rotated on the fixed tube.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The fixed pipe is fixedly connected to the platform plate, the adjusting sleeve is rotatably arranged on the fixed pipe, the threaded rod is slidably arranged in the fixed pipe, the threaded rod is threadedly connected with the adjusting sleeve, and under the obstruction of the limiting mechanism, when the adjusting sleeve is rotated, the threaded rod can move along the axial direction of the fixed pipe, so that the threaded rod can move away from the platform plate, so that when the bottom surface around the hole of the pile foundation hole is not flat, the position of the threaded rod in the fixed pipe can be adjusted, so that the bottom of each support member is in conflict with the ground, thereby improving the stability of the platform formwork, thereby improving the positioning accuracy of the steel cage;

[0029] 2. The rotating ring is rotatably arranged on the platform plate, and the first bevel gear is installed on the rotating ring. When the driving mechanism drives the rotating ring to rotate, the rotating ring can drive the first bevel gear to rotate. When the bottom of the support member does not touch the ground, the thrust of the thrust mechanism can keep the second bevel gear and the first bevel gear engaged; when the bottom of the support member contacts the ground, the pulling mechanism can pull the second bevel gear away from the first bevel gear, so that the second bevel gear can be disengaged from the first bevel gear, so that when the driving mechanism drives the rotating ring to rotate, the first bevel gear can simultaneously drive the second bevel gear on the support member whose bottom is not in contact with the ground to rotate, so that the threaded rod in the support rod whose bottom is not in contact with the ground can approach the ground until it contacts the ground;

[0030] 3. As the threaded rod moves toward the ground, when the bottom surface of the trigger block contacts the ground, as the threaded rod continues to move toward the ground, the trigger block slides into the sliding groove under the contact with the ground, and when the moving contact piece contacts the fixed contact piece, the electrical circuit of the electromagnet is turned on, so that when the bottom of the support member contacts the ground, the electrical circuit of the electromagnet can automatically turn on and pull the second bevel gear to slide away from the first bevel gear, so that the second bevel gear is disengaged from the first bevel gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the pouring device in the embodiment of the present application.

[0032] Figure 2 It is a schematic diagram of the bottom surface structure of the pouring device in the embodiment of the present application.

[0033] Figure 3 It is a sectional view of the driving device in the embodiment of the present application.

[0034] Figure 4 It is a sectional view of the support member in the embodiment of the present application.

[0035] Explanation of reference numerals:

[0036] 1. Platform plate; 11. Middle hole; 2. Support member; 21. Fixed pipe; 211. Limit ring groove; 212. Limit groove; 22. Threaded rod; 23. Adjusting sleeve; 231. Yielding groove; 232. Sliding block; 233. Strip groove; 234. Second bevel gear; 2341. Protrusion; 24. Fixing member; 241. Installation groove; 25. Bearing plate; 251. Sliding groove; 252. Blocking groove; 26. Limiting mechanism; 261. Limiting block; 3. Support frame; 31. Inner ring; 32. Connecting rod; 33. Outer ring; 4. Driving device; 41. Rotating ring; 42. First bevel gear; 43. Annular slide rail; 44. Slide block; 45. Driving mechanism; 451. Motor; 452. Driving gear; 453. Driven gear; 46. Thrust mechanism; 461. Second spring; 462. Telescopic rod; 47. Tensile mechanism; 471. Attracting block; 472. Electromagnet; 473. Triggering component; 4731. Trigger block; 4732. Fixed contact piece; 4733. Moving contact piece; 4734. Power supply; 4735. Blocking block; 4736. First spring; 100. Platform formwork; 200. Positioning formwork; 201. Installation ring; 202. Fixed rod; 203. Positioning pipe. Detailed implementation manners

[0037] The following further elaborates on the present application in conjunction with the attached Figures 1-4 drawings.

[0038] The embodiment of the present application discloses a pouring device for cast-in-place piles. Referring to Figure 1 and Figure 2 as shown, the pouring device includes a platform formwork 100 and a positioning formwork 200. The platform formwork 100 includes a platform plate 1, a support member 2, a support frame 3, and a driving device 4. The platform plate 1 is horizontally arranged above the pile foundation hole. The outer contour of the platform plate 1 is a regular octagon, and a middle hole 11 is provided in the middle of the top surface of the platform plate 1.

[0039] Referring to Figure 1 and Figure 2As shown, the support frame 3 is fixedly connected to the bottom surface of the platform plate 1, and the support frame 3 includes an inner ring 31, a connecting rod 32 and an outer ring 33. The outer ring 33 is a regular octagonal ring, and the outer ring 33 is welded and fixed to the bottom surface of the platform plate 1. The center of the outer ring 33 coincides with the axis line of the middle hole 11, and the inner ring 31 is located on the inner side of the outer ring 33. The axis line of the inner ring 31 coincides with the axis line of the middle hole 11. Eight connecting rods 32 are horizontally arranged between the inner ring 31 and the outer ring 33. One end of the connecting rod 32 is welded and fixed to the outer peripheral surface of the inner ring 31, and the other end of the connecting rod 32 is welded and fixed to the inner side surface of the outer ring 33. The eight connecting rods 32 are evenly distributed along the circumferential direction of the inner ring 31, and the ends of the connecting rods 32 away from the inner ring 31 are welded and fixed to the platform plate 1.

[0040] Reference Figure 1 and Figure 2 As shown, the positioning formwork 200 is installed on the connecting rod 32, and the positioning formwork 200 includes a mounting ring 201, a fixing rod 202 and a positioning tube 203. The mounting ring 201 is fixedly connected to the connecting rod 32 by bolts, and the axis of the mounting ring 201 coincides with the axis of the middle hole 11. Eight fixing rods 202 are welded and fixed on the outer circumference of the mounting ring 201. The eight fixing rods 202 are all horizontally arranged and evenly distributed along the circumferential direction of the mounting ring 201. The positioning tube 203 corresponds to the fixing rod 202 one by one, and the positioning tube 203 is vertically welded and fixed to the end of the fixing rod 202 away from the mounting ring 201. The vertical positioning ribs of the steel cage pass through the positioning tube 203 and are fixed to the positioning tube 203.

[0041] Reference Figure 2 and Figure 3 As shown, the support members 2 are located on the bottom surface of the platform plate 1 and are fixed in multiple groups. In this embodiment, the number of the support members 2 is eight groups, and the eight groups of support members 2 are located on the bottom surface of the platform plate 1 and are evenly distributed along the circumferential direction of the center hole 11. The support member 2 includes a fixed tube 21, a threaded rod 22, an adjustment sleeve 23, a fixed member 24, a bearing plate 25 and a limit mechanism 26. The fixed tube 21 is vertically welded and fixed on the bottom surface of the platform plate 1, and the threaded rod 22 is vertically slidably arranged in the fixed tube 21.

[0042] Reference Figure 3 and Figure 4 As shown, a clearance groove 231 is provided on the top end surface of the adjustment sleeve 23, the bottom end of the fixed tube 21 is inserted into the clearance groove 231, a sliding block 232 is welded and fixed on the inner peripheral wall of the clearance groove 231, a limiting ring groove 211 is provided on the outer peripheral surface of the fixed tube 21, the sliding block 232 is slidably arranged in the limiting ring groove 211, the adjustment sleeve 23 is rotatably arranged on the bottom of the fixed tube 21, the adjustment sleeve 23 is sleeved on the threaded rod 22, and the adjustment sleeve 23 is threadedly connected to the threaded rod 22. The bearing plate 25 is welded and fixed on the bottom end surface of the threaded rod 22.

[0043] Referring to Figure 3 and Figure 4 as shown, a limiting groove 212 is formed on the inner wall of the fixed pipe 21. The length direction of the limiting groove 212 is parallel to the axial line direction of the fixed pipe 21. The limiting mechanism 26 includes a limiting block 261. The limiting block 261 is welded and fixed to the top of the threaded rod 22. The limiting block 261 is slidably arranged in the limiting groove 212. When the adjusting sleeve 23 rotates, the threaded rod 22 can move vertically.

[0044] Referring to Figure 3 and Figure 4 as shown, four strip-shaped grooves 233 are formed on the outer peripheral surface of the adjusting sleeve 23. The length direction of the strip-shaped grooves 233 is parallel to the axial line direction of the fixed pipe 21. The four strip-shaped grooves 233 are equally angularly distributed along the circumferential direction of the adjusting sleeve 23. A second bevel gear 234 is sleeved on the adjusting sleeve 23. Four convex blocks 2341 are fixedly connected to the inner peripheral surface of the second bevel gear 234. The four convex blocks 2341 are respectively slidably arranged in the four strip-shaped grooves 233. When the second bevel gear 234 rotates, it can drive the adjusting sleeve 23 to rotate. At the same time, the second bevel gear 234 can slide vertically on the adjusting sleeve 23.

[0045] Referring to Figure 3 and Figure 4 as shown, the fixing member 24 is annular. The fixing member 24 is sleeved on the bottom of the adjusting sleeve 23. The fixing member 24 is welded and fixed to the adjusting sleeve 23. The second bevel gear 234 is located above the fixing member 24. An annular installation groove 241 is formed on the top surface of the fixing member 24. The axial line of the installation groove 241 coincides with the axial line of the fixing member 24.

[0046] Referring to Figure 3 and Figure 4 as shown, the driving device 4 includes a rotating ring 41, a first bevel gear 42, an annular slide rail 43, a slider 44, a driving mechanism 45, a thrust mechanism 46 and a tension mechanism 47. Four groups of thrust mechanisms 46 are arranged between the fixing member 24 and the second bevel gear 234. The four groups of thrust mechanisms 46 are equally angularly distributed along the circumferential direction of the fixing member 24.

[0047] Referring to Figure 3 and Figure 4 as shown, the thrust mechanism 46 includes a second spring 461 and a telescopic rod 462. The telescopic rod 462 is arranged vertically. One end of the telescopic rod 462 is fixedly connected to the bottom wall of the installation groove 241. The end of the telescopic rod 462 away from the fixing member 24 is fixedly connected to the bottom surface of the second bevel gear 234. The second spring 461 is sleeved outside the telescopic rod 462. One end of the second spring 461 abuts against the fixing member 24. The other end of the second spring 461 abuts against the second bevel gear 234.

[0048] Referring to Figure 3 andFigure 4 As shown, the pulling mechanism 47 includes an attracting block 471, an electromagnet 472, and a trigger assembly 473. The attracting block 471 is annular, and the attracting block 471 is coaxially fixed to the bottom surface of the second bevel gear 234. An annular electromagnet 472 is fixedly connected in the mounting groove 241, and the outer peripheral surface of the electromagnet 472 abuts against the inner peripheral wall of the mounting groove 241. The electromagnet 472 and the attracting block 471 are distributed vertically.

[0049] Refer to Figure 3 and Figure 4 As shown, a sliding groove 251 is formed on the bottom surface of the bearing plate 25. The trigger assembly 473 includes a trigger block 4731, a fixed contact piece 4732, a moving contact piece 4733, a power source 4734, a stop block 4735, and a first spring 4736. Two stop grooves 252 are formed on the side wall of the sliding groove 251, and the two stop grooves 252 are symmetrically arranged on two sides of the inner wall of the stop groove 252 away from each other. Two stop blocks 4735 are fixedly connected to the side surface of the trigger block 4731, and the two stop blocks 4735 are respectively located on two sides of the trigger block 4731 away from each other. The stop block 4735 is slidably arranged in the stop groove 252, and the trigger block 4731 is vertically slidably arranged in the sliding groove 251.

[0050] Refer to Figure 3 and Figure 4 As shown, there are two first springs 4736 arranged in the mounting groove 241. One end of the first spring 4736 abuts against the top wall of the sliding groove 251, and the other end of the first spring 4736 abuts against the top surface of the trigger block 4731.

[0051] Refer to Figure 3 and Figure 4 As shown, the fixed contact piece 4732 is fixedly connected to the top wall of the sliding groove 251, the moving contact piece 4733 is fixedly connected to the top surface of the trigger block 4731, the fixed contact piece 4732 and the moving contact piece 4733 are distributed vertically, the power source 4734 is fixedly connected to the bottom surface of the platform plate 1, one of the electrodes of the moving contact piece 4733 is electrically connected to the power source 4734, the other electrode of the power source 4734 is electrically connected to one end of the internal coil of the electromagnet 472, and the other end of the internal coil of the electromagnet 472 is electrically connected to the fixed contact piece 4732.

[0052] Refer to Figure 3 and Figure 4 As shown, when the trigger block 4731 slides into the sliding groove 251 so that the moving contact piece 4733 contacts the fixed contact piece 4732, at this time, the bottom surface of the sliding block 232 is flush with the bottom surface of the bearing plate 25, the electrical circuit of the electromagnet 472 is conducted, the electromagnet 472 generates an attractive force on the attracting block 471, and the attracting block 471 drives the second bevel gear 234 to slide downward against the elastic force of the second spring 461.

[0053] Refer toFigure 2 and Figure 3 As shown in Figure 3 , the annular slide rail 43 is fixedly connected to the bottom surface of the platform plate 1, and the center of the annular slide rail 43 coincides with the axis of the middle hole 11. The slider 44 is fixedly welded to the top surface of the rotating ring 41, and the slider 44 is slidably arranged on the annular slide rail 43, so that the rotating ring 41 can be rotatably arranged on the platform plate 1.

[0054] Referring to Figure 3 and Figure 4 As shown in Figure 4 , the first bevel gear 42 is coaxially and fixedly welded to the bottom surface of the rotating ring 41. When the bearing plate 25 on the support member 2 does not touch the ground, the fixed contact piece 4732 on the support member 2 is separated from the moving contact piece 4733. Under the elastic force of the second spring 461, the second bevel gear 234 meshes with the first bevel gear 42.

[0055] Referring to Figure 3 and Figure 4 As shown in Figure 4 , the driving mechanism 45 includes a motor 451, a driving gear 452 and a driven gear 453. The motor 451 is fixed to the bottom surface of the platform plate 1 by bolts. The driving gear 452 is coaxially fixedly connected to the output shaft of the motor 451. The driven gear 453 is fixedly welded to the inner peripheral wall of the rotating ring 41, and the rotation axis of the driven gear 453 coincides with the rotation axis of the rotating ring 41. The driving gear 452 meshes with the driven gear 453. When the motor 451 is started, the driving gear 452 can drive the driven gear 453 to rotate, so that the driven gear 453 drives the first bevel gear 42 to rotate through the rotating ring 41.

[0056] The implementation principle of the pouring device for a cast-in-place pile in the embodiment of the present application is as follows: When the bearing plate 25 at the bottom of the support member 2 does not touch the ground, the bottom surface of the trigger block 4731 is below the bottom surface of the bearing plate 25. At this time, the moving contact piece 4733 and the fixed contact piece 4732 are separated, and the second bevel gear 234 can remain meshed with the first bevel gear 42 under the elastic force of the second spring 461. When the motor 451 drives the rotating ring 41 to rotate through the driving gear 452 and the driven gear 453, the rotating ring 41 can drive the adjusting sleeve 23 to rotate through the first bevel gear 42 and the second bevel gear 234, so that the threaded rod 22 moves towards the ground.

[0057] As the threaded rod 22 moves towards the ground, when the bottom surface of the trigger block 4731 touches the ground, as the threaded rod 22 continues to move towards the ground, the trigger block 4731 slides into the sliding groove 251 under the contact action with the ground. When the moving contact piece 4733 contacts the fixed contact piece 4732, the electrical circuit of the electromagnet 472 is conducted. Thus, when the bottom of the support member 2 touches the ground, the electrical circuit of the electromagnet 472 can be automatically conducted and pull the second bevel gear 234 to slide away from the first bevel gear 42, disengaging the second bevel gear 234 from the first bevel gear 42 and automatically releasing the drive of the first bevel gear 42 on the second bevel gear 234. As a result, the drive device 4 can be adjusted synchronously with the support member 2 that is not in contact with the ground until all the support members 2 are in contact with the ground, improving the stability of the platform formwork 100 and thus enhancing the positioning accuracy of the steel reinforcement cage.

[0058] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. 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 casting device for cast-in-place piles, comprising a platform formwork (100) and a positioning formwork (200) installed on the platform formwork (100), characterized in that: The platform formwork (100) includes a platform plate (1) arranged above the pile foundation hole. A plurality of support members (2) are installed on the bottom surface of the platform plate (1). The support member (2) includes a fixed pipe (21) fixed on the platform plate (1) and a threaded rod (22) slidably arranged in the fixed pipe (21). An adjusting sleeve (23) is rotatably arranged on the fixed pipe (21). The adjusting sleeve (23) is sleeved on the threaded rod (22), and the adjusting sleeve (23) is threadedly connected with the threaded rod (22). A limiting mechanism (26) is arranged between the threaded rod (22) and the fixed pipe (21) to prevent the threaded rod (22) from rotating synchronously with the adjusting sleeve (23). A driving device (4) is arranged on the platform plate (1). The driving device (4) includes a rotating ring (41) rotatably arranged on the platform plate (1). A first bevel gear (42) is coaxially installed on the rotating ring (41). Second bevel gears (234) for driving the adjusting sleeve (23) to rotate are arranged on the adjusting sleeves (23). The second bevel gears (234) are all meshed with the first bevel gear (42). The second bevel gears (234) are slidably arranged on the adjusting sleeves (23). A thrust mechanism (46) for pushing the second bevel gear (234) towards the first bevel gear (42) and a pulling mechanism (47) for pulling the second bevel gear (234) away from the first bevel gear (42) when the bottom of the support member (2) abuts against the ground are further arranged on the adjusting sleeves (23). The driving device (4) further includes a driving mechanism (45) for driving the rotating ring (41) to rotate. The pulling mechanism (47) includes an attracting block (471) fixedly connected to the second bevel gear (234). A fixing member (24) is installed on the adjusting sleeve (23). An installation groove (241) is formed on the side surface of the fixing member (24) close to the second bevel gear (234). An electromagnet (472) for generating an attractive force on the attracting block (471) is installed in the installation groove (241). A bearing plate (25) is fixedly connected to the bottom surface of the threaded rod (22). A sliding groove (251) is formed in the bottom surface of the bearing plate (25). The tension mechanism (47) further includes a trigger assembly (473). The trigger assembly (473) includes a trigger block (4731) slidably disposed in the sliding groove (251). A fixed contact piece (4732) is fixedly connected to the top wall of the sliding groove (251). A moving contact piece (4733) for abutting against the fixed contact piece (4732) is fixedly connected to the top surface of the trigger block (4731). A power source (4734) is fixedly connected to the platform plate (1). One electrode of the moving contact piece (4733) is electrically connected to the power source (4734). The other electrode of the power source (4734) is electrically connected to one end of the internal coil of the electromagnet (472). The other end of the internal coil of the electromagnet (472) is electrically connected to the fixed contact piece (4732).

2. The casting device for cast-in-place piles according to claim 1, characterized in that: A retaining groove (252) is formed in the side wall of the sliding groove (251). A retaining block (4735) is fixedly connected to the side surface of the trigger block (4731). The retaining block (4735) is slidably disposed in the retaining groove (252). A first spring (4736) is disposed in the mounting groove (241). One end of the first spring (4736) abuts against the top wall of the sliding groove (251). The other end of the first spring (4736) abuts against the top surface of the trigger block (4731).

3. The casting device for cast-in-place piles according to claim 1, characterized in that: The thrust mechanism (46) is disposed between the fixing member (24) and the second bevel gear (234). The thrust mechanism (46) includes a telescopic rod (462) with one end fixedly connected to the fixing member (24) and a second spring (461) sleeved outside the telescopic rod (462). The end of the telescopic rod (462) away from the fixing member (24) is fixedly connected to the second bevel gear (234). One end of the second spring (461) abuts against the fixing member (24). The other end of the second spring (461) abuts against the second bevel gear (234).

4. The casting device for cast-in-place piles according to claim 1, characterized in that: A strip-shaped groove (233) is formed in the adjusting sleeve (23). The length direction of the strip-shaped groove (233) is parallel to the axial line direction of the fixed tube (21). A convex block (2341) is fixedly connected to the second bevel gear (234). The convex block (2341) is slidably disposed in the strip-shaped groove (233).

5. The casting device for cast-in-place piles according to claim 1, characterized in that: An annular slide rail (43) is installed on the platform plate (1). A slider (44) is fixedly connected to the rotating ring (41). The slider (44) is slidably arranged on the annular slide rail (43). The driving mechanism (45) includes a motor (451) installed on the platform plate (1) and a driving gear (452) coaxially and fixedly connected to the output shaft of the motor (451). A driven gear (453) with a rotation axis coinciding with the rotation axis of the rotating ring (41) is installed on the inner peripheral wall of the rotating ring (41). The driving gear (452) meshes with the driven gear (453).

6. The casting device for cast-in-place piles according to claim 1, characterized in that: A limiting groove (212) is formed on the inner wall of the fixed pipe (21). The length direction of the limiting groove (212) is parallel to the axial direction of the fixed pipe (21). The limiting mechanism (26) includes a limiting block (261) fixedly connected to the threaded rod (22). The limiting block (261) is slidably arranged in the limiting groove (212).

7. The casting device for cast-in-place piles according to claim 1, characterized in that: A limiting ring groove (211) is formed on the outer peripheral surface of the fixed pipe (21). A relief groove (231) is formed on the end face of the adjusting sleeve (23) close to the platform plate (1). One end of the fixed pipe (21) away from the platform plate (1) is inserted into the relief groove (231). A sliding block (232) is fixedly connected to the inner peripheral wall of the relief groove (231). The sliding block (232) is slidably arranged in the limiting ring groove (211).

Images