Synchronous drilling device for caisson

Abstract

This invention discloses a synchronous drilling device for caissons, used for drilling cement mixing piles during caisson construction. It includes a fixed base, a lifting device, a turntable, slide rails, a movable device, a drilling machine, a connecting rod, and a circumferential adjustment disc. A support frame is provided at the bottom of the fixed base, and a synchronous tightening device is provided inside the support frame. The fixed base is installed at the upper part of the caisson position via the synchronous tightening device and the caisson hole support wall. The lifting device is located on the upper surface of the fixed base, and a disc is provided at the top of the lifting device that can cooperate with the turntable and achieve coaxial rotation. Multiple evenly distributed slide rails are provided radially outward along the edge of the turntable to assemble the movable device. Each movable device is equipped with a drilling machine and can move along the slide rails with the entire assembly. A circumferential adjustment disc is located at the center of the upper part of the turntable and is connected to the movable device via a connecting rod. Driving the circumferential adjustment disc can drag the connecting rod, thereby moving the movable device along the slide rails. This device can simultaneously process multiple cement mixing pile holes, adjust positions, perform high-efficiency repeated drilling, and is easy to move as a whole.

Description

Technical Field

[0001] The invention belongs to the technical field of caisson drilling, and in particular relates to a synchronous drilling device for caisson. Background Art

[0002] In the construction of buildings, such as deep foundation pits, bridge piers and basements, sinking structures and foundation structures are often required during the construction process, and are mostly implemented in the form of caissons. Due to the poor bearing capacity of shallow foundations, in order to prevent the adverse effects of soil squeezing on the pile foundation when the caisson sinks, especially the pipe piles arranged at the bottom of the caisson, the pipe piles will be squeezed during the caisson sinking construction process, which is prone to tilting, broken piles and floating piles. Therefore, the pile foundation needs to be protected during the construction process. It is necessary to drill a certain number of deep holes evenly on the ground outside the caisson area and pour concrete, and make cement mixing piles to consolidate the surrounding foundations and soil to prevent loosening and collapse during the caisson process, which will lead to quality problems such as caisson tilting.

[0003] Cement mixing piles use cement as a curing agent, and use a special drill bit to force mixing deep in the foundation. In combination with other materials, soft soil and curing agent are mixed together within a certain range to form a pile body. The soft soil is hardened to achieve the purpose of improving the overall strength of the foundation. Under the action of cement mixing piles, the phenomenon of soil outside the caisson rising into the well during excavation can be prevented. The sinking speed, depth and verticality are accurately controlled. After the caisson is in place, the axis displacement error, elevation error and inclination can meet the requirements of national standards. The use of cement mixing piles to treat soft soil foundations is very effective, and it can be put into use quickly after the treatment is completed.

[0004] However, the existing drilling methods and efficiency are limited. Usually, a single impact drill or drill bit is used to drill holes one by one. The high cost of saving equipment time affects the progress of the project. Alternatively, multiple drilling equipment are used to drill holes at the same time. However, the overall movement and alignment during repetitive work will still be time-consuming and laborious due to the large number of equipment resources, which in turn causes the problem of low work efficiency. Under the premise of high cost, the improvement of time efficiency is very limited, but it has caused a waste of time and resources to a certain extent.

[0005] Therefore, there is an urgent need for a device that can process multiple holes at one time, easily adjust the position, repeat and efficiently drill holes, and is easy to move as a whole, thereby improving work efficiency and saving construction time costs of drilling work. Summary of the invention

[0006] In view of the problem that the sinking of a circular caisson requires drilling holes for surrounding cement mixing piles, and the existing caisson drilling process is either time-consuming or wastes resources, the present invention provides a synchronous drilling device for caissons. A set of equipment is equipped with multiple linked and synchronously retractable drill bits to adjust and balance resource saving, low cost and high efficiency, thereby solving the defects and problems existing in the existing technology, specifically a synchronous drilling device for caissons.

[0007] A synchronous drilling device for caisson, comprising a fixed seat, a lifting device, a turntable, a slide rail, a movable device, a drilling machine, a connecting rod and a circumferential adjustment plate, a support frame is provided at the bottom of the fixed seat, a synchronous jacking device is provided on the inner side of the support frame, the fixed seat is installed on the upper part of the caisson position through the synchronous jacking device and the caisson hole support wall, the lifting device is provided on the upper surface of the fixed seat, a disc body is provided on the top of the lifting device, the disc body and the turntable set on the upper side can rotate coaxially, a plurality of slide rails extending outwards are fixed along the radial direction, oblique direction or tangential direction on the edge of the turntable, each slide rail is provided A matching set of movable devices is provided in the rail, and a drilling machine is vertically fixed on each movable device. The drilling machine can move along the slide rail with the movable device as a whole. A circumferential adjustment disk is provided at the center of the upper part of the turntable. A plurality of axial holes are evenly distributed on the edge of the circumferential adjustment disk and a plurality of connecting rods are respectively hinged. The outer end of each connecting rod is hinged to the rear end of the corresponding movable device. After driving the circumferential adjustment disk to rotate, a plurality of connecting rods can be dragged at the same time, thereby driving the movable device to slide along the slide rail, thereby realizing the synchronous retraction or extension of each movable device. A locking mechanism is provided on the upper part of the circumferential adjustment disk.

[0008] The locking mechanism is a sealing cover arranged on the upper part of the circumferential adjustment disk. Locking the sealing cover can limit and lock the connecting rods on the top of the device at the same time.

[0009] The synchronous tightening device adopts a screw and sleeve structure for transmission. The screw is fixed by supporting sleeves at both ends of the support frame. A group of screw sleeves with opposite thread rotation directions are each provided with a tightening plate at the lower part and are respectively mounted on the front and rear ends of the screw. A rocker arm is extended at one end of the screw. The screw can be rotated by manually rotating the rocker arm continuously clockwise or counterclockwise. The rotation of the screw drives the screw sleeve to move to both ends so that the tightening plate presses the supporting wall of the caisson hole.

[0010] The two ends of the tightening plate are embedded in the inner grooves of the support frame at the bottom of the fixed seat, and the tightening plate extends downward into the caisson. The downwardly extended tightening plate can meet the contact area or length when close to the supporting wall of the caisson hole, thereby providing stable support and limitation.

[0011] A boss with a threaded top is arranged in the middle of the disc body at the top of the lifting device, an annular step groove is arranged on the outer edge of the disc body at the top of the lifting device, and pin limiting holes are evenly distributed on the circumference of the annular step groove on the outer edge of the disc body at the top of the lifting device.

[0012] The slide rails are evenly arranged along the circumference of the edge of the turntable.

[0013] An axial hole is arranged in the middle of the turntable, an annular docking boss is arranged on the upper surface of the turntable, a limiting hole is arranged on the outer edge of the upper part of the turntable, and the inner side of the bottom surface of the turntable is a circular groove and the outer side is an annular boss.

[0014] The diameter of the limiting hole arranged at the upper outer edge of the turntable is consistent with the outer diameter of the pin limiting hole at the outer edge of the top disk body of the lifting device.

[0015] The middle of the circumferential adjustment disk is provided with an axial hole, the bottom is provided with an annular boss, the top of the circumferential adjustment disk is provided with a driving boss, and the center of the driving boss is provided with a hole so as to facilitate manual shifting with a crowbar.

[0016] The bottom of the sealing cover is provided with a groove, and a thread is arranged in the groove and is matched with a boss with a thread to seal and press the turntable at the top of the device.

[0017] Beneficial effects of the present invention

[0018] The synchronous drilling device for caisson of the present invention can realize the drilling of multiple cement mixing pile holes on the circumference at one time, and the cement mixing pile holes can be drilled in a synchronous array along the slide rail by guiding the slide rail. The cement mixing pile holes at different positions on the circumference can be quickly drilled along the linear array of the slide rail by driving the turntable. The holes can be selectively drilled by the fixed-distance drilling of the slide rail and the circumferential rotation, so that fewer holes can be close to the circumference of the caisson and more holes can be far away from the radial direction of the caisson to achieve the purpose of appropriate density of cement mixing pile holes.

[0019] Compared with a single traditional drilling machine, this device can drill multiple holes at one time, and saves space compared with multiple drilling machines; the device is easy to adjust the hole position, and the reference datum is always fixed, so there is no need for multiple calibrations. The error and deviation of recalibration of the single machine each time it moves to find the position are large; when drilling holes along the circumference, because each caisson datum is determined once, holes are drilled at a fixed distance along the slide rail, and the density of the drilled holes is more uniform and the quality is better; the working efficiency and quality of this device are higher than that of a single machine with repeated work, and the efficiency is higher than that of multiple single machines with the same number of drilling machines as this device, and the time cost and resource consumption cost are also lower than that of a single machine and multiple single machines.

[0020] For the construction of multiple caissons, the device can also be moved, relocated and transferred as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall schematic diagram of the device and the partial diagram A of the pin, the partial diagram B1 of the rotary docking of the disc body and the partial diagram C of the impact drill shaft;

[0022] Figure 2 yes Figure 1 Schematic diagram of the middle fixing seat and caisson assembly;

[0023] Figure 3 yes Figure 2 Bottom view of the middle fixing seat;

[0024] Figure 4 yes Figure 1 The overall schematic diagram of the medium scissor lift;

[0025] Figure 5 yes Figure 1 Schematic diagram of the middle support plate;

[0026] Figure 6 yes Figure 1 Schematic diagram of the turntable;

[0027] Figure 7 yes Figure 1 Middle and upper assembly diagram Figure 1 ;

[0028] Figure 8 yes Figure 1 Middle and upper assembly diagram Figure 2 ;

[0029] Fig. 9 yes Figure 8 Schematic diagram of the position relationship of the middle and upper parts;

[0030] Fig.10 yes Figure 7 Top view of the middle and upper assembly;

[0031] Fig.11 yes Figure 1 Schematic diagram and partial diagram D1 of the assembly of the impact drill and the groove rail;

[0032] Fig.12 yes Figure 1 Partial diagram of the middle plate body rotation docking B2;

[0033] Fig.13 yes Fig.11 Partial view D2 of the impact drill and groove rail assembly.

[0034] Numbers in the figure: fixed seat 1, scissor lift 2, support plate 3, turntable 4, circumferential adjustment plate 5, driving boss 6, cover 7, connecting rod 8, drilling machine 9, movable device 10, top support plate 101, support seat 1011, bottom fixed frame 102, synchronous tightening device 103, screw 1031, screw sleeve 1032, tightening plate 1033, rocker arm 1034. DETAILED DESCRIPTION

[0035] To solve the existing problems: the drilling methods and efficiency are limited, usually a single impact drill and drill bit are used to drill holes one by one, which is too time-consuming and costly and affects the progress of the project; multiple drilling equipment are used to drill holes at the same time, but when the overall movement and alignment are repeated during the work, due to the large number of equipment resources, it will still cause a waste of time and resources, and thus cause low work efficiency.

[0036] In view of the sinking of a circular caisson, a synchronous drilling device for drilling holes for surrounding cement mixing piles is provided, including a fixed seat, a lifting device, a turntable, a slide rail, a movable device, a drilling machine, a connecting rod and a circumferential adjustment plate. A support frame is provided at the bottom of the fixed seat, and a synchronous jacking device is provided on the inner side of the support frame. The fixed seat is installed on the upper part of the caisson position through the synchronous jacking device and the caisson hole support wall. The lifting device is provided on the upper surface of the fixed seat, and a disc body is provided on the top of the lifting device. The disc body can rotate coaxially with the turntable set on its upper side, and the edge of the turntable is fixed radially, obliquely or tangentially. A slide rail extending outwards, each slide rail is matched with a movable device, a drilling machine is vertically fixed on each movable device, and the drilling machine can move along the slide rail with the movable device as a whole. A circumferential adjustment disk is arranged at the center of the upper part of the turntable, and a plurality of axial holes are evenly distributed on the edge of the circumferential adjustment disk and a plurality of connecting rods are respectively hinged, and the outer end of each connecting rod is hinged to the rear end of the corresponding movable device. After driving the circumferential adjustment disk to rotate, a plurality of connecting rods can be dragged at the same time, thereby driving the movable device to slide along the slide rail, so as to realize the synchronous retraction or extension of each movable device, and a locking mechanism is arranged on the upper part of the circumferential adjustment disk.

[0037] The locking mechanism is a sealing cover arranged on the upper part of the circumferential adjustment disk. Locking the sealing cover can limit and lock the connecting rods on the top of the device at the same time.

[0038] The synchronous tightening device adopts a screw and sleeve structure for transmission. The screw is fixed by supporting sleeves at both ends of the support frame. A group of screw sleeves with opposite thread rotation directions are each provided with a tightening plate at the lower part and are respectively mounted on the front and rear ends of the screw. A rocker arm is extended at one end of the screw. The screw can be rotated by manually rotating the rocker arm continuously clockwise or counterclockwise. The rotation of the screw drives the screw sleeve to move to both ends so that the tightening plate presses the supporting wall of the caisson hole.

[0039] The two ends of the tightening plate are embedded in the inner grooves of the support frame at the bottom of the fixed seat, and the tightening plate extends downward into the caisson. The downwardly extended tightening plate can meet the contact area or length when close to the supporting wall of the caisson hole, thereby providing stable support and limitation.

[0040] A boss with a threaded top is arranged in the middle of the disc body at the top of the lifting device, an annular step groove is arranged on the outer edge of the disc body at the top of the lifting device, and pin limiting holes are evenly distributed on the circumference of the annular step groove on the outer edge of the disc body at the top of the lifting device.

[0041] The slide rails are evenly arranged along the circumference of the edge of the turntable.

[0042] An axial hole is arranged in the middle of the turntable, an annular docking boss is arranged on the upper surface of the turntable, a limiting hole is arranged on the outer edge of the upper part of the turntable, and the inner side of the bottom surface of the turntable is a circular groove and the outer side is an annular boss.

[0043] The diameter of the limiting hole arranged at the upper outer edge of the turntable is consistent with the outer diameter of the pin limiting hole at the outer edge of the top disk body of the lifting device.

[0044] The middle of the circumferential adjustment disk is provided with an axial hole, the bottom is provided with an annular boss, the top of the circumferential adjustment disk is provided with a driving boss, and the center of the driving boss is provided with a hole so as to facilitate manual shifting with a crowbar.

[0045] The bottom of the sealing cover is provided with a groove, and a thread is arranged in the groove and is matched with a boss with a thread to seal and press the turntable at the top of the device.

[0046] The implementation method and process are further described in detail below with reference to the accompanying drawings.

[0047] Embodiment 1:

[0048] See also Figures 1 to 11 As shown, the present invention is used for reinforcing the soil around the caisson, and is a synchronous drilling device for the caisson, including a fixed seat 1, a scissor lift 2, a support plate 3, a turntable 4, a circular adjustment plate 5, a driving boss 6, a cover 7, a connecting rod 8, a drilling machine 9 and a movable device 10 and other components.

[0049] like Figure 1 , Figure 2 and Figure 3 As shown, the fixing seat 1 includes a top support plate 101, a bottom fixing frame 102 and a synchronous tightening device 103, wherein the top support plate is provided with holes for facilitating the installation of an upper structure such as a lifting device, and the bottom fixing frame is a parallel steel structure with grooves such as a channel steel. Support seats 1011 are provided at both ends of the bottom surface of the bottom support plate to support the synchronous tightening device 103 as a whole. The tightening device 103 is composed of a screw 1031, a screw sleeve 1032 and a tightening plate 1033.

[0050] The screw sleeve and the tightening plate are fixedly connected, wherein the thread directions of the front and rear screw sleeves are opposite to ensure that the screw sleeves move in opposite directions (or approach each other or move away from each other) when the screw rotates, wherein bosses are provided at both ends of the tightening plate and grooves on the inner side of the fixing frame to cooperate and limit, the tightening plate and the screw sleeve will not rotate during the rotation of the screw, the tightening plate and the screw sleeve will only move forward and backward along the axial direction of the screw, and a limit and locking device is provided at the end of the screw close to the rocker arm.

[0051] As the screw rods move away from each other, the two tightening plates contact and tighten the supporting wall of the caisson hole, where the supporting wall of the caisson hole can be the inner wall of the caisson foundation (such as Figure 1 As shown in the figure), the caisson hole support wall can also be the inner wall of the tunnel set before the caisson foundation is settled, or the inner wall of the foundation for temporary limitation and positioning (such as Figure 2 as shown).

[0052] like Figure 4As shown, the lifting device is a scissor-type lifting mechanism, the bottom of which is installed on the top support plate of the fixing seat 1, and is installed corresponding to the hole position of the top support plate 101. The scissor-type lifting mechanism is an existing scissor-type lifting machine, including a scissor-type lifting frame, a hydraulic transmission device and a top support platform, and the top support platform is directly set in the structural form of the support plate 3 (the middle support plate 3 can also be set or installed on the top support platform, and the top support platform can be set as a single lifting device top bracket).

[0053] like Figure 4 and Figure 5 As shown, the bottom of the support plate 3 is connected to the top of the lifting device, that is, the bottom of the support plate 3 is provided with holes and grooves to connect with the top of the scissor-type lifting device. The upper part of the support plate 3 is provided with a boss with a top thread, and the boss with a top thread is a columnar mandrel structure. The top thread of the boss with a top thread facilitates the installation and locking of the upper cover 7. The support plate 3 has an annular stepped groove on the outer edge (see Figure 2 As shown, its cross-section and assembly relationship are as follows Figure 1 As shown in the partial enlarged view of part A in the figure, the holes therein can be equipped with pins for positioning and fixing). There are pin limit holes evenly distributed on the circumference of the annular step groove on the outer edge of the top plate of the lifting device (such as Figure 5 As shown), the number of pin limiting holes evenly distributed should be sufficient to divide the circumference into equal parts, for example: 18 or 36 or 72, etc.

[0054] like Figure 6 As shown, the middle of the turntable 4 is provided with a positioning hole at the edge of the shaft hole, and the upper surface of the turntable is provided with an annular docking boss that docks with the bottom of the circumferential adjustment plate 5 (see the docking state). Figure 1 As shown in the partial enlarged view of B1 in the figure), the upper outer edge of the turntable is provided with a limit hole, and the bottom of the turntable is stepped, with the inner side of the bottom surface being a circular groove and the outer side being an annular boss. The annular boss at the bottom of the turntable and the annular step groove of the support plate 3 are installed correspondingly; the limit holes on the upper outer edge of the turntable and the evenly distributed pin limit holes on the support plate can overlap correspondingly, that is, the distribution of the circumference is consistent in size, and at the same time, the evenly distributed limit holes on the outer edge of the turntable are 2 or 3 or 4, and should not be too many to avoid cumbersome disassembly. The outer diameter of the turntable is radially provided with a plurality of slide rails evenly distributed along the circumference. The number of slide rails can be: 4 or 6 or 8, and should not be too many to avoid excessive working load on the upper structure. The slide rail can adopt a cantilever structure with a rectangular or circular cross-section. The inner side and bottom of the slide rail are provided with a groove-type track so that the movable device 10 with rollers can slide or roll along the track (see Fig.11 and partial enlarged view D1), the movable device 10 is integrally embedded in the track; the slide rail can also be provided with a groove rail on the outside or outer edge, and the movable device 10 is provided with a hole-fitting structure (see Fig.13As shown in the partial enlarged view D2, a roller or a pulley is provided on the side of the inner hole to cooperate with the groove rail on the outside of the slide rail, and the movable device 10 is integrally mounted on the slide rail and can move forward and backward. The movable device is also provided with a suspension structure for assembling a drilling machine 9 to make holes (most of which are impact rotary drilling machines). A hole is provided on the upper part of the movable device to connect with the hole of the connecting rod 8. The hole at the other end of the connecting rod 8 is connected to the hole set on the outer edge of the circumferential adjustment disk 5. The bottom of the circumferential adjustment disk 5 is provided with an annular boss to dock with the annular boss on the top of the turntable. The purpose of setting the boss to rotate relative to each other is to avoid the entire bottom surface of the circumferential adjustment disk 5 from contacting the turntable and thereby increasing the friction force. The axial hole provided in the middle of the circumferential adjustment disk 5 is mounted on the threaded convex shaft in the center of the support disk 3, and the disk bodies are finally sealed by the cover 7. A driving boss 6 is also provided on the outer side of the axial hole of the circumferential adjustment disk 5. A through hole is provided on the upper part of the driving boss 6 so that a crowbar or a steel bar can pass through and push it; a hole is provided on the outer edge of the circumferential adjustment disk 5 to facilitate docking with the hole of the connecting rod. Therefore, the circumferential adjustment disk 5 can be driven to rotate by driving the boss 6, and the rotation of the circumferential adjustment disk 5 pulls the connecting rod to be driven. At this time, the relationship between the circumferential adjustment disk 5 and the connecting rod 8 is equivalent to a simple rocker mechanism; at the same time, the connecting rod 8 is connected to the movable device 10 through the hole, and then the movable device 10 is pulled to slide along the slide rail. The movable device 10 is equivalent to a slider mechanism and the connecting rod to form a connecting rod slider device.

[0055] For the upper and lower position relationship of the upper plate and parts of the device, refer to Fig. 9 shown.

[0056] The overall working process of the device is as follows: the bottom of the fixed seat 1 is placed at the caisson arrangement position or the upper part of the caisson by a crane, the fixed seat is positioned and clamped by a hand-cranked rocker arm, and the screw position is locked by a limit locking device close to the rocker arm so that the position of the fixed seat 1 remains unchanged relative to the ground or the caisson; secondly, a scissor-type lifting structure is installed on the upper part of the fixed seat; a turntable 4 is mounted on the support plate on the scissor-type lifting structure, and a circumferential adjustment plate 5 is mounted on the turntable 4, and a cover is further mounted to stabilize the upper structure; after the disk structure on the upper part of the device is installed and stabilized, a movable device 10 and a connecting rod 8 are installed on the slide rail of the turntable, and finally a drilling machine 9 is mounted or hoisted. After all parts are adjusted and installed, the circumferential adjustment plate 5 is driven to make the overall position of the drilling machine 9 at the proximal or distal end to prepare for work (when driving the circumferential adjustment plate 5, the change process of the driven state of the parts caused by the different motion states of the upper disk body can be seen in the figure). Figure 7 and Figure 8 , Figure 7 and Fig.10The scissor lift is the limit state 1), and the rotating disk and the lower supporting disk are locked by the pin shaft. Secondly, the scissor lift is raised and the spiral drill bit at the bottom of the drilling machine is connected; when the machine is turned on, all drilling machines 9 are turned on, and the scissor lift is started at the same time. The upper supporting disk and the associated drilling machine 9 are moved downward stably through the hydraulic device of the scissor lift. The drill bit of the drilling machine 9 contacts the ground and starts to move downward steadily to drill the soil. When the scissor lift is lowered to the limit position, the upper drilling machine 9 is withdrawn, and the position of the drilling machine 9 is moved along the slide rail by driving the circumferential adjustment plate 5 to perform drilling work at the next position of a certain radial distance (see Figure 1 ), during this process, the drilling rigs on multiple uniformly distributed slide rails can realize the simultaneous drilling of multiple holes, and the fixed-distance movement along the slide rails can realize the repeated and efficient work of multiple hole positions and fixed distances, thereby enhancing the strength of the ground; the slide rails can be set to drill holes at multiple positions and staggered positions to ensure a reasonable distribution of hole density. After the slide rail stroke is completed, the positioning pin shaft between the support plate and the turntable can be pulled out, and the slide rail can be pushed to move the turntable to a certain angle (such as 5 degrees, 10 degrees, etc.) and then repositioned, and the drilling work along the slide rail can be repeated; by repeating the above process, the drilling of cement mixing pile holes with a larger density around the caisson is completed. When multiple caissons need to be drilled, the entire installed device can be stopped to release the lower limit, and then moved to the next working position as a whole by the crane and hoist. It is simple and fast, and can greatly improve the efficiency of drilling cement mixing pile holes.

[0057] Embodiment 2:

[0058] On the basis of Example 1, considering that when the upper and lower boss structures of the rotating disk 4 and the circumferential adjustment disk 5 are butted and fitted, there may still be a large friction force, causing inconvenience in work, an improvement is now proposed. Figure 1 The stable docking mode of the middle B1 section is replaced by Fig.12 The docking method of the annular groove and the annular boss of the middle B2 includes: 1. A trapezoidal groove is opened on the upper part of the turntable 4 and a corresponding trapezoidal boss is set on the lower part of the circumferential adjustment disk 5; 2. A trapezoidal boss is set on the upper part of the turntable 4 and a corresponding trapezoidal groove is set on the lower part of the circumferential adjustment disk 5.

[0059] Embodiment 3:

[0060] On the basis of Example 2, it is considered that the upper and lower boss structures of the turntable 4 and the circumferential adjustment plate 5 are docked and fitted, and when they rotate relative to each other; when the turntable and the support plate rotate relative to each other. Even if there are bearings in the middle of each shaft hole, the upper disk body will still exert a considerable positive pressure on the lower disk body at the docking point of each disk-shaped stepped groove. During the rotation process, if the construction environment is eroded by wind, sand, and moisture, it is very easy to cause rust between the relative disk bodies, affecting the relative rotation. Therefore, the structure may be further optimized, and the following solution is proposed to solve the problem:

[0061] A rolling or sliding device is arranged at the bottom of the upper disk at the docking position. Similarly, the positioning and locking device between the corresponding upper and lower disks can still adopt the positioning method of the pin shaft, but the distribution of the pin shaft hole positions needs to be appropriately increased; the rolling or sliding structure can be: 1. A reserved position between the circumferences of the docking position is filled with a certain number of balls and rollers, similar to the free balls inside the bearing (at this time, the docking of the outer edges between the support disk and the turntable should also be a structure with a groove on the lower disk and a docking boss on the upper disk, and the balls are arranged in the lower groove to avoid leakage); 2. A sliding or rolling ball or roller is installed at the bottom of the upper disk at the docking position (when it is a ball, the ball shell and the upper part are fixedly connected).

[0062] Embodiment 4:

[0063] On the basis of Example 3, considering that manually driving the driving boss 6 on the circumferential adjustment disk 5 is time-consuming, labor-intensive and inefficient, an optimization solution is first proposed:

[0064] A boss is provided at the bottom of the circular adjustment disk 5, and a gear is provided on the outside of the boss. It is mounted on the central boss-shaped core shaft of the support disk through a reserved gap and can rotate freely. By adding a motor to the turntable, a worm gear is provided on the output shaft of the motor to cooperate with the gear, so as to realize the electric drive rotation of the circular adjustment disk 5, wherein the setting height of the connecting rod should be higher than the height of the motor to avoid interference.

[0065] Embodiment 5:

[0066] On the basis of Example 3, considering that manually driving the driving boss 6 on the circumferential adjustment disk 5 is time-consuming, labor-intensive and inefficient, an optimization solution is first proposed:

[0067] The structure of the circumferential adjustment plate 5 is deleted, and a plurality of hydraulic push rod devices are installed instead, and the axis of the hydraulic push rod and the axis of the slide rail coincide with each other.

Claims

1. A synchronous drilling device for caisson, characterized in that: It includes a fixed seat, a lifting device, a turntable, a slide rail, a movable device, a drilling machine, a connecting rod and a circumferential adjustment plate. A support frame is provided at the bottom of the fixed seat, and a synchronous tightening device is provided on the inner side of the support frame. The fixed seat is installed on the upper part of the caisson position through the synchronous tightening device and the caisson hole support wall. The lifting device is provided on the upper surface of the fixed seat, and a disc body is provided on the top of the lifting device. The disc body can rotate coaxially with the turntable set on its upper side. A plurality of slide rails extending outward are fixed along the radial, oblique or tangential direction on the edge of the turntable, and a matching set is provided in each slide rail. Movable device, each movable device is vertically fixed with a drilling machine, the drilling machine can move along the slide rail with the movable device as a whole, a circumferential adjustment disk is arranged at the center of the upper part of the turntable, the edge of the circumferential adjustment disk is evenly distributed with multiple axial holes and multiple connecting rods are respectively hinged, the outer end of each connecting rod is hinged to the rear end of the corresponding movable device, after driving the circumferential adjustment disk to rotate, it can simultaneously drag multiple connecting rods and then drive the movable device to slide along the slide rail, so as to realize the synchronous retraction or extension of each movable device, and a locking mechanism is arranged on the upper part of the circumferential adjustment disk.

2. A synchronous drilling device for caisson according to claim 1, characterized in that: The locking mechanism is a sealing cover arranged on the upper part of the circumferential adjustment disk. Locking the sealing cover can limit and lock the connecting rods on the top of the device at the same time.

3. A synchronous drilling device for caisson according to claim 1, characterized in that: The synchronous tightening device adopts the structure of screw and sleeve for transmission. The screw is fixed by supporting sleeves at both ends of the support frame. A group of screw sleeves with opposite thread rotation directions are each provided with a tightening plate at the lower part and are respectively mounted on the front and rear ends of the screw as a whole. A rocker arm is extended at one end of the screw. The screw can be rotated by manually rotating the rocker arm continuously clockwise or counterclockwise. The rotation of the screw drives the screw sleeve to move to both ends so that the tightening plate presses the supporting wall of the caisson hole.

4. A synchronous drilling device for caisson according to claim 3, characterized in that: The two ends of the top tightening plate are embedded in the inner grooves of the support frame at the bottom of the fixed seat, and the top tightening plate extends downward into the caisson. The downwardly extended top tightening plate can meet the contact with the support wall of the caisson hole with sufficient area or length, thereby providing stable support and limitation.

5. The synchronous drilling device for caisson according to claim 1, characterized in that: A boss with a threaded top is arranged in the middle of the disc body at the top of the lifting device, an annular stepped groove is arranged on the outer edge of the disc body at the top of the lifting device, and pin limiting holes are evenly distributed on the circumference of the annular stepped groove on the outer edge of the disc body at the top of the lifting device.

6. A synchronous drilling device for caisson according to claim 1, characterized in that: The slide rails are evenly arranged along the circumference of the edge of the turntable.

7. A synchronous drilling device for caisson according to claim 5, characterized in that: The middle of the turntable is provided with an axial hole, the upper surface of the turntable is provided with an annular docking boss, the upper outer edge of the turntable is provided with a limiting hole, the inner side of the bottom surface of the turntable is a circular groove and the outer side is an annular boss.

8. A synchronous drilling device for caisson according to claim 7, characterized in that: The diameter of the limiting hole arranged on the upper outer edge of the rotating disk is consistent with the outer diameter of the pin limiting hole on the outer edge of the top disk body of the lifting device.

9. A synchronous drilling device for caisson according to claim 7, characterized in that: The circumferential adjustment disk is provided with an axial hole in the middle, an annular boss at the bottom, a driving boss at the top, and a hole at the center of the driving boss for manual shifting with a crowbar.

10. A synchronous drilling device for caisson according to claim 2, characterized in that: The sealing cover has a groove at the bottom, a thread is arranged in the groove and is matched with a boss with the thread to seal and press the rotating disk at the top of the device.

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