An auxiliary device for the installation of prestressed pipe piles

Abstract

This invention relates to an auxiliary device for installing prestressed concrete pipe piles, comprising a machine body with a sliding track inside the machine body, on the inner wall of which a pile clamping box is slidably mounted; two hydraulic supports are fixedly mounted on the upper end face of the machine body, and a downward hydraulic cylinder is fixedly connected to the inner wall of each hydraulic support; the bottom end of each downward hydraulic cylinder is fixedly connected to the side end face of the pile clamping box; a pile clamping mechanism is fixedly installed inside the pile clamping box; the downward hydraulic cylinder includes a downward cylinder body and a downward telescopic end, and the downward telescopic end is connected to the pile clamping box; a telescopic connector is fixedly connected to the lower end of the downward telescopic end, and a box connector is fixedly connected to the side end face of the pile clamping box, and the telescopic connector is connected to the box connector; when the resistance encountered by the prestressed concrete pipe pile during descent does not exceed a preset value, the telescopic connector and the box connector move synchronously; when the resistance encountered by the prestressed concrete pipe pile during descent exceeds the preset value, the telescopic connector and the box connector move relative to each other.

Description

Technical Field

[0001] This invention belongs to the technical field of prestressed pipe pile construction, specifically an installation auxiliary device for prestressed pipe piles. Background Technology

[0002] In the field of construction engineering, precast piles are what we know as reinforced concrete piles, steel piles, and wooden piles, etc. Generally speaking, in the field of pile foundations, most construction projects prioritize the use of reinforced concrete piles. Compared with other types of piles, precast reinforced concrete piles have advantages in practical applications, such as stronger load-bearing capacity, smaller settlement deformation, and higher efficiency. Therefore, they stand out among other types of piles and are widely used in the construction engineering field.

[0003] Static pressure piling, also known as static pressure reinforced concrete precast pile, is an important method in pile foundation construction. It relies on the piling mechanism of a static pile driver, using the machine's own weight and counterweights on the frame as reaction forces to slowly press the precast pile into the soil. This pile driving process has many advantages, including no damage to the pile body, no noise, no vibration, no impact during construction, and being environmentally friendly and pollution-free.

[0004] In static pressure pile construction, a pile driver is needed as an auxiliary device for the installation of prestressed pipe piles. During operation, a crane lifts the prestressed pipe pile, adjusts the crane's direction to position the prestressed pipe pile above the clamping box and aligns it with the clamping mechanism, so that the prestressed pipe pile enters the clamping box. The clamping mechanism then clamps the prestressed pipe pile, and the hydraulic cylinder is activated to drive the clamping box to rise or fall, thus completing the pile driving work.

[0005] When prestressed concrete pipe piles are lowered, there is a preset speed. The hydraulic cylinder moves at a predetermined speed to lower the pile clamping box at the same rate. In practice, personnel observe the descent speed of the prestressed concrete pipe pile. If the descent speed slows down, it indicates excessive resistance to the pile, potentially damaging it, and the machine is stopped for inspection. However, there is a time gap between when personnel observe the pile descent being too slow and when the machine is stopped; this time may have already allowed damage to occur.

[0006] Furthermore, advanced prestressed concrete pipe pile installation auxiliary devices feature four hydraulic cylinders and clamping jaws arranged in a circular array inside the clamping box. These clamps tighten the prestressed concrete pipe pile in both the transverse and longitudinal directions, improving the stability of the prestressed concrete pipe pile as it moves with the clamping box and preventing it from shifting. However, if a pair of hydraulic cylinders in the transverse or longitudinal direction causes the prestressed concrete pipe pile to shift, it will not only lead to the pile shifting but also cause a mismatch between the clamping jaws and the prestressed concrete pipe pile. If the hydraulic cylinders still maintain the preset amount of action, the excessive linear clamping force on the clamping jaws and the prestressed concrete pipe pile can damage both.

[0007] Therefore, there is an urgent need for an installation auxiliary device for prestressed concrete pipe piles that can solve the above problems. Summary of the Invention

[0008] To solve the above problems, the present invention proposes an installation auxiliary device for prestressed pipe piles, including a machine body, an internal sliding track, and a pile clamping box slidably installed on the inner wall of the sliding track.

[0009] Two hydraulic supports are fixedly installed on the upper end face of the machine body, and a downward hydraulic cylinder is fixedly connected to the inner wall of each hydraulic support. The bottom end of each downward hydraulic cylinder is fixedly connected to the side end face of the pile clamping box. A pile clamping mechanism is fixedly installed inside the pile clamping box.

[0010] The lowering hydraulic cylinder includes a lowering cylinder body and a lowering telescopic end, and the lowering telescopic end is connected to the pile clamping box body.

[0011] The lower end of the downward-pressing telescopic end is fixedly connected to a telescopic connector, and the side end face of the clamping pile box is fixedly connected to a box connector, and the telescopic connector is connected to the box connector.

[0012] Specifically, when the resistance encountered by the prestressed pipe pile during descent does not exceed the preset value, the expansion joint and the box joint move synchronously; when the resistance encountered by the prestressed pipe pile during descent exceeds the preset value, the expansion joint and the box joint move relative to each other.

[0013] Furthermore, the telescopic connector is configured as a column with a square cross-section, and the box connector is provided with a stress relief groove, the shape and size of which match the telescopic connector.

[0014] The telescopic connector has a sliding groove on its side, and telescopic teeth are slidably provided in the sliding groove.

[0015] A spring element is also provided inside the sliding groove, with one end of the spring element connected to the telescopic tooth and the other end connected to the bottom surface of the sliding groove.

[0016] The sidewall of the unloading groove is provided with meshing tooth grooves, and the shape and size of the meshing tooth grooves match the telescopic teeth.

[0017] Furthermore, the spring element is configured to consist of a mechanical helical spring and an electrical spring connected in series.

[0018] Furthermore, the pile clamping mechanism includes four pile clamping hydraulic cylinders arranged in a circular array, and the bottom of the pile clamping cylinder body is fixedly installed on the inner side wall of the pile clamping box.

[0019] The top of the pile clamping extension end of the pile clamping hydraulic cylinder is connected to a pile clamping jaw, and the shape and size of the jaw end of the pile clamping jaw are matched with the prestressed pipe pile.

[0020] Furthermore, a pile clamping protection element is also sleeved on the end of the pile clamping telescopic end, and the end of the pile clamping protection element away from the pile clamping telescopic end is fixedly connected to the pile clamping jaws.

[0021] When no pile clamping offset occurs in the transverse pair of pile clamping jaws or the longitudinal pair of pile clamping jaws, the longitudinal pair of pile clamping protection elements or the transverse pair of pile clamping protection elements move synchronously with the pile clamping telescopic end.

[0022] When a pair of horizontal or vertical clamping jaws cause a clamping offset, the pair of vertical or horizontal clamping protection elements will move relative to the clamping extension end.

[0023] The pile clamping mechanism also includes auxiliary pile clamping hydraulic cylinders arranged in a circular array. The bottom of the auxiliary cylinder body of the auxiliary pile clamping hydraulic cylinder is fixedly installed on the inner side wall of the pile clamping box, and the top of the auxiliary telescopic end of the auxiliary pile clamping hydraulic cylinder is fixedly connected to the pile clamping jaws.

[0024] Furthermore, the pile clamping expansion end is configured as a column with a circular cross-section, and the pile clamping protection element is provided with a correction protection groove, and the shape and size of the correction protection groove are matched with the pile clamping expansion end.

[0025] The side of the correction protection groove is provided with a telescopic groove, and a telescopic hemisphere is slidably installed inside the telescopic groove.

[0026] A spring is also installed inside the telescopic groove, with one end of the spring connected to the telescopic hemisphere and the other end connected to the bottom surface of the telescopic groove.

[0027] The side of the expansion joint of the pile is provided with a hemispherical groove, and the shape and size of the hemispherical groove match the expansion hemisphere.

[0028] Furthermore, distance sensors and / or pressure sensors are also installed inside the telescopic groove.

[0029] Furthermore, the number of telescopic teeth is set to multiple, and the number of meshing grooves is greater than the number of telescopic teeth.

[0030] Furthermore, the number of telescopic hemispheres is set to multiple, and the number of hemispherical grooves is greater than the number of telescopic hemispheres.

[0031] Furthermore, a crane mounting base is fixedly installed on the upper surface of the machine body, a slewing seat is installed on the upper surface of the crane mounting base, and a crane is installed on the upper surface of the slewing seat.

[0032] The crane includes a hydraulic rod, and a winding machine is rotatably connected to the top of the hydraulic rod. A wire rope is fixedly connected to the outer surface of the winding machine, and a hook lock is fixedly connected to the bottom of the wire rope.

[0033] And / or, a running gear is fixedly connected to both sides of the fuselage, and a short boat is fixedly connected to the bottom of the fuselage.

[0034] Compared with the prior art, the advantages of the present invention are as follows:

[0035] 1. When the resistance encountered by the prestressed pipe pile during descent does not exceed the preset value, the expansion joint and the box-type connector move synchronously. When the resistance encountered by the prestressed pipe pile during descent exceeds the preset value, the expansion joint and the box-type connector move relative to each other. Therefore, when the resistance encountered by the prestressed pipe pile during descent exceeds the preset value, although the downward-pressing expansion end continues to press down at the preset speed, the box-type connector and the clamping box automatically stop descending, thus automatically stopping the pressing down of the prestressed pipe pile, preventing damage to the prestressed pipe pile, and eliminating damage to the pipe pile caused by the period from when personnel observe the prestressed pipe pile descending too slowly until the machine stops.

[0036] 2. When the resistance experienced by the prestressed pipe pile does not exceed the preset value, the telescopic tooth remains extended under the action of the spring element, and the telescopic tooth remains engaged with the meshing tooth groove. The telescopic connector and the box body connector move synchronously. When the resistance experienced by the prestressed pipe pile exceeds the preset value, although the downward telescopic end is still pressing down at the preset speed, the elasticity of the spring element is insufficient to keep the telescopic tooth extended. The telescopic tooth retracts into the sliding groove and jumps into the next meshing tooth groove. The telescopic connector and the box body connector move relative to each other, so that the box body connector and the clamping box automatically stop descending, avoiding damage to the prestressed pipe pile P.

[0037] 3. When a pair of transverse or longitudinal pile clamping jaws deviates from their clamping position, although the longitudinal or transverse pile clamping extension ends continue to extend by the preset amount, the longitudinal or transverse pile clamping protective elements and the pile clamping jaws automatically stop moving. Consequently, the longitudinal or transverse pile clamping jaws automatically stop clamping the prestressed pipe pile, thus automatically preventing damage to the prestressed pipe pile and the pile clamping jaws.

[0038] 4. When the clamping jaws do not deviate from their clamping position, the telescopic hemisphere remains extended under the action of the spring, and the telescopic hemisphere is engaged with the hemispherical groove. The clamping protection element moves synchronously with the telescopic end of the clamping jaws. When the clamping jaws deviate from their clamping position, although the telescopic end of the clamping jaws still maintains the preset extension amount, the spring force is insufficient to keep the telescopic hemisphere in the extended position. The telescopic hemisphere retracts into the telescopic groove and jumps into the next hemispherical groove. The clamping protection element and the telescopic end of the clamping jaws move relative to each other, thereby automatically stopping the clamping jaws from clamping the prestressed pipe pile, avoiding damage to the prestressed pipe pile and the clamping jaws.

[0039] 5. When the prestressed concrete pipe pile experiences clamping displacement, the movement distance of the telescopic hemisphere and / or the pressure on the spring are detected by sensors, and feedback is provided. This setting automatically stops clamping the pile when the clamping jaws shift, preventing damage to the clamping jaws and the prestressed concrete pipe pile; it also automatically detects the clamping displacement by detecting the movement distance of the telescopic hemisphere and / or the pressure on the spring, allowing for timely adjustments. Attached Figure Description

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0041] Figure 1 This is an overall structural diagram of the installation auxiliary device for prestressed pipe piles;

[0042] Figure 2 This is a structural diagram of the downward hydraulic system;

[0043] Figure 3 This is a sectional view of the downward hydraulic system;

[0044] Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle;

[0045] Figure 5 for Figure 4 Enlarged view of a section at point B in the middle;

[0046] Figure 6 This is a structural diagram of the pile clamping mechanism and the pile clamping box.

[0047] Figure 7 This is a structural diagram of the pile clamping mechanism;

[0048] Figure 8 This is a top view of the pile clamping mechanism;

[0049] Figure 9 for Figure 8 Sectional view at point AA;

[0050] Figure 10 for Figure 9 Enlarged view of a section at point C;

[0051] In the diagram, the components are: prestressed concrete pipe pile P, machine body 100, crane mounting base 110, traveling structure 120, short boat 130, pile clamping box 200, hydraulic support frame 300, downward hydraulic cylinder 310, downward cylinder body 311, downward telescopic end 312, pile clamping mechanism 400, pile clamping hydraulic cylinder 410, pile clamping cylinder body 411, pile clamping telescopic end 412, pile clamping jaws 413, jaw end 414, hemispherical groove 415, pile clamping protection element 420, and correction protection groove 421. 422, telescopic groove, 423, telescopic hemisphere, 424, spring, 430, auxiliary clamping hydraulic cylinder, 431, auxiliary cylinder body, 432, auxiliary telescopic end, 500, 510, crane, 511, winch, 512, wire rope, 513, hook lock, 514, pressure protection mechanism, 600, telescopic connector, 610, sliding groove, 612, telescopic tooth, 613, box connector, 620, unloading groove, 621, meshing tooth groove, 622. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0053] like Figure 1-10 As shown, this embodiment provides an installation auxiliary device for prestressed pipe piles, including a machine body 100. The machine body 100 has a passageway (not shown) inside. A pile clamping box 200 is slidably installed on the inner wall of the passageway. Two hydraulic supports 300 are fixedly installed on the upper end face of the machine body 100, and a downward hydraulic cylinder 310 is fixedly connected to the inner wall of each hydraulic support 300. The bottom end of each downward hydraulic cylinder 310 is fixedly connected to the side end face of the pile clamping box 200. A pile clamping mechanism 400 is fixedly installed inside the pile clamping box 200.

[0054] A crane mounting base 110 is also fixedly installed on the upper end face of the machine body 100. A slewing seat 500 is installed on the upper end face of the crane mounting base 110, and a crane 510 is installed on the upper end face of the slewing seat 500. By rotating the slewing seat 500, the orientation of the crane 510 is changed, so that the crane 510 can lift the prestressed pipe pile P to the top of the pile clamping box 200, so that the prestressed pipe pile P enters the designated position.

[0055] Understandably, when the prestressed pipe pile installation auxiliary device is working, the prestressed pipe pile P is lifted by the crane 510, the crane 510 is adjusted to rotate so that the prestressed pipe pile P is above the pile clamping box 200 and aligned with the pile clamping mechanism 400, so that the prestressed pipe pile P enters the pile clamping box 200 and is clamped by the pile clamping mechanism 400. Then, the hydraulic cylinder 310 is activated to drive the pile clamping box 200 to rise or fall, thus completing the pile driving work.

[0056] The crane 510 of this embodiment includes a hydraulic rod 511, which provides support for the crane 510. A winding machine 512 is rotatably connected to the top of the hydraulic rod 511. A wire rope 513 is fixedly connected to the outer surface of the winding machine 512. A hook lock 514 is fixedly connected to the bottom end of the wire rope 513. The wire rope 513 is wound or unwound by the winding machine 512, so that the wire rope 513 can drive the hook lock 514 to descend or ascend, so that the device can lift and place the prestressed pipe pile P.

[0057] The hydraulic pressing system of this embodiment includes a pressing cylinder 310 comprising a pressing cylinder body 311 and a pressing telescopic end 312, with the telescopic end 312 connected to the pile clamping box 200 to drive the pile clamping box 200 to rise or fall. It should be noted that the prestressed concrete pipe pile P has a preset speed when pressed down; that is, the telescopic end 312 extends at a predetermined speed to drive the pile clamping box 200 to fall at a predetermined speed. In practice, the descent speed of the prestressed concrete pipe pile P is observed by personnel. If the descent speed slows down, it indicates that the prestressed concrete pipe pile P is experiencing excessive resistance, which may damage the prestressed concrete pipe pile P. The machine should then be stopped for inspection.

[0058] However, the time required from when personnel observe the prestressed pipe pile P descending too slowly to when the machine needs to be stopped may have already caused damage to the pipe pile.

[0059] To eliminate the above-mentioned defects, the downward hydraulic system of this embodiment also includes a downward protection mechanism 600, which includes a telescopic connector 610 and a housing connector 620. The upper end of the telescopic connector 610 is fixedly connected to the lower end of the downward telescopic end 312, and the housing connector 620 is fixedly connected to the side end face of the pile clamping housing 200. The telescopic connector 610 and the housing connector 620 are connected, so that under normal conditions, the downward telescopic end 312 drives the telescopic connector 610, the housing connector 620 and the pile clamping housing 200 to descend synchronously.

[0060] Specifically, when the resistance encountered by the prestressed pipe pile P during its descent does not exceed a preset value, the telescopic connector 610 and the box connector 620 move synchronously; when the resistance encountered by the prestressed pipe pile P during its descent exceeds the preset value, the telescopic connector 610 and the box connector 620 move relative to each other. Therefore, when the resistance encountered by the prestressed pipe pile P during its descent exceeds the preset value, although the downward-pressing telescopic end 312 continues to press down at a preset speed, the box connector 620 and the pile clamping box 200 automatically stop descending, thus automatically stopping the downward pressure on the prestressed pipe pile P, preventing damage to the prestressed pipe pile P, and eliminating damage to the pipe pile caused by the period from when personnel observe the prestressed pipe pile P descending too slowly until the machine stops.

[0061] Specifically, the telescopic connector 610 is configured as a column with a square cross-section, and the box connector 620 is provided with a stress-relieving groove 621, the shape and size of which match the telescopic connector 610; the side of the telescopic connector 610 is provided with a sliding groove 611, and a telescopic tooth 612 is slidably provided in the sliding groove 611; a spring element 613 is also provided in the sliding groove 611, one end of which is connected to the telescopic tooth 612, and the other end is connected to the bottom surface of the sliding groove 611; the side wall of the stress-relieving groove 621 is provided with a meshing tooth groove 622, the shape and size of which match the telescopic tooth 612.

[0062] Therefore, when the resistance encountered by the prestressed pipe pile P during its descent does not exceed the preset value, the telescopic tooth 612 remains extended under the action of the spring element 613, and the telescopic tooth 612 remains engaged with the meshing groove 622. The telescopic connector 610 and the box connector 620 move synchronously. When the resistance encountered by the prestressed pipe pile P during its descent exceeds the preset value, although the pressing telescopic end 312 is still pressing down at the preset speed, the elasticity of the spring element 613 is insufficient to keep the telescopic tooth 612 in the extended state. The telescopic tooth 612 retracts into the sliding groove 611 and jumps into the next meshing groove 622. The telescopic connector 610 and the box connector 620 move relative to each other, so the box connector 620 and the pile clamping box 200 automatically stop descending. As a result, the prestressed pipe pile P automatically stops pressing down, avoiding damage to the prestressed pipe pile P and eliminating the possibility of damage to the pipe pile caused by the time from when the prestressed pipe pile P descends too slowly to when the machine stops.

[0063] Preferably, the number of telescopic teeth 612 can be multiple to increase the stability of the meshing; the number of meshing grooves 622 is greater than the number of telescopic teeth 612, thereby allowing the telescopic connector 610 to move relative to the housing connector 620.

[0064] It is worth noting that the spring element 613 in this embodiment can be configured as a combination of a mechanical helical spring and an electric spring connected in series. On the one hand, the helical spring ensures that the telescopic tooth 612 has sufficient travel. On the other hand, the overall elastic coefficient of the spring element 613 can be changed by adjusting the elastic coefficient of the electric spring according to the actual working conditions, so as to match different resistance values. In addition, once the resistance encountered by the prestressed pipe pile P during descent exceeds the preset value, that is, the compressive force on the spring element 613 increases, the spring element 613 can also feed back to the control system, allowing the equipment to stop in time.

[0065] The pile clamping mechanism 400 of this embodiment includes four pile clamping hydraulic cylinders 410 arranged in a circumferential array. The bottom of the pile clamping cylinder body 411 of the pile clamping hydraulic cylinder 410 is fixedly installed on the inner side wall of the pile clamping box 200. The top of the pile clamping telescopic end 412 of the pile clamping hydraulic cylinder 410 is connected to a pile clamping jaw 413, and the shape and size of the jaw end 414 of the jaw 413 matches the prestressed pipe pile P. Therefore, compared with the pair of pile clamping jaws commonly used in the prior art, the prestressed pipe pile P is clamped in both the intersecting transverse and longitudinal directions, improving the stability of the prestressed pipe pile P as it moves with the pile clamping box 200 and preventing the prestressed pipe pile P from deviating.

[0066] Understandably, during the installation of prestressed concrete pipe piles, it is essential to ensure that they do not shift as much as possible. However, with Figure 8For example, if the pair of hydraulic cylinders 410 in the lateral direction cause the prestressed pipe pile P to shift laterally, it will not only cause the prestressed pipe pile P to shift, but also cause the pair of clamping jaws 413 in the longitudinal direction to mismatch with the prestressed pipe pile P. If the longitudinal clamping extension end 412 still maintains the preset extension amount, it will also cause the clamping jaws 413 and the prestressed pipe pile P to generate excessive linear clamping force, resulting in damage to the clamping jaws 413 and the prestressed pipe pile P.

[0067] To eliminate the above-mentioned defects, the pile clamping mechanism 400 of this embodiment is further provided with a pile clamping protection element 420 at the end of the pile clamping telescopic end 412, and the end of the pile clamping protection element 420 away from the pile clamping telescopic end 412 is fixedly connected to the pile clamping jaw 413.

[0068] When no pile offset occurs when the pair of transverse or longitudinal pile clamping jaws 413 clamp the prestressed pipe pile P, the pair of longitudinal or transverse pile clamping protection elements 420 and the pile clamping extension end 412 move synchronously. When a pile offset occurs when the pair of transverse or longitudinal pile clamping jaws 413 clamp the prestressed pipe pile P, the pair of longitudinal or transverse pile clamping protection elements 420 and the pile clamping extension end 412 move relative to each other.

[0069] Therefore, when a pair of transverse or longitudinal pile clamping jaws 413 clamp the prestressed pipe pile P and a pile offset occurs, although the pair of longitudinal or transverse pile clamping telescopic ends 412 still extend according to the preset extension amount, the pair of longitudinal or transverse pile clamping protective elements 420 and the pile clamping jaws 413 automatically stop moving. As a result, the pair of longitudinal or transverse pile clamping jaws 413 automatically stop clamping the prestressed pipe pile P, thus automatically preventing damage to the prestressed pipe pile P and the pile clamping jaws 413.

[0070] Specifically, the pile clamping telescopic end 412 is configured as a cylindrical body with a circular cross-section. The pile clamping protection element 420 has a correction protection groove 421, and the shape and size of the correction protection groove 421 match the pile clamping telescopic end 412. A telescopic groove 422 is provided on the side of the correction protection groove 421, and a telescopic hemisphere 423 is slidably provided in the telescopic groove 422. A spring 424 is also provided in the telescopic groove 422, and one end of the spring 424 is connected to the telescopic hemisphere 423, and the other end is connected to the bottom surface of the telescopic groove 422. A hemispherical groove 415 is provided on the side of the pile clamping telescopic end 412, and the shape and size of the hemispherical groove 415 match the telescopic hemisphere 423.

[0071] Therefore, when no pile offset occurs when the pair of transverse or longitudinal pile clamping jaws 413 clamp the prestressed pipe pile P, the telescopic hemisphere 423 remains extended under the action of the spring 424, and the telescopic hemisphere 423 remains engaged with the hemispherical groove 415. The pair of longitudinal or transverse pile clamping protection elements 420 move synchronously with the pile clamping telescopic end 412. When pile offset occurs when the pair of transverse or longitudinal pile clamping jaws 413 clamp the prestressed pipe pile P, although the pair of longitudinal or transverse pile clamping telescopic ends 412 still maintain the preset... The extension amount is insufficient, but the elastic force of the spring 424 is not enough to keep the telescopic hemisphere 423 in the extended state. The telescopic hemisphere 423 retracts into the telescopic groove 422 and jumps into the next hemisphere groove 415. The pair of longitudinal or transverse pile clamping protection elements 420 move relative to the pile clamping telescopic end 412, so that the pair of longitudinal or transverse pile clamping jaws 413 automatically stop clamping the prestressed pipe pile P, avoiding damage to the prestressed pipe pile P and the pile clamping jaws 413. This eliminates the possibility of excessive linear clamping force between the pile clamping jaws 413 and the prestressed pipe pile P, which could cause damage to the pile clamping jaws 413 and the prestressed pipe pile P.

[0072] Preferably, there can be multiple telescopic hemispheres 423 to increase the stability of the engagement; the number of hemispherical grooves 415 is greater than the number of telescopic hemispheres 423, thereby allowing relative movement between the pile clamping protection element 420 and the pile clamping telescopic end 412.

[0073] It is worth noting that, in this embodiment, a distance sensor and / or a pressure sensor can also be installed inside the expansion groove 422. When the prestressed pipe pile P experiences clamping displacement, the sensors detect the movement distance of the expansion hemisphere 423 and / or the pressure on the spring 424, and provide feedback. With this setting, when the pile clamping jaws 413 experience pile clamping displacement, it can not only automatically stop clamping the pile to prevent damage to the pile clamping jaws 413 and the prestressed pipe pile P, but also automatically detect the pile clamping displacement by detecting the movement distance of the expansion hemisphere 423 and / or the pressure on the spring 424, so as to make timely adjustments.

[0074] In this embodiment, the pile clamping mechanism 400 further includes auxiliary pile clamping hydraulic cylinders 430 arranged in a circumferential array. The bottom of the auxiliary cylinder body 431 of the auxiliary pile clamping hydraulic cylinder 430 is fixedly installed on the inner side wall of the pile clamping box 200, and the top of the auxiliary telescopic end 432 of the auxiliary pile clamping hydraulic cylinder 430 is fixedly connected to the pile clamping jaws 413. Thus, when it is ensured that the four pile clamping hydraulic cylinders 410 drive the pile clamping jaws 413 to clamp the prestressed pipe pile P without displacement, the auxiliary pile clamping hydraulic cylinders 430 are activated, so that the four pile clamping jaws 413 clamp the prestressed pipe pile P more stably, ensuring that the stability of the pile clamping and the non-displacement are not affected by external forces during the pile driving process.

[0075] In this embodiment, a walking structure 120 is fixedly connected to both sides of the fuselage 100, and a short boat 130 is fixedly connected to the bottom surface of the fuselage 100. The installation auxiliary device for the prestressed pipe pile can be moved by the cross movement of the walking structure 120 and the short boat 130, thereby changing the pile driving position.

[0076] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An auxiliary device for installing prestressed pipe piles, comprising a machine body, wherein a sliding track is provided inside the machine body, and a pile clamping box is slidably installed on the inner wall of the sliding track; Two hydraulic supports are fixedly installed on the upper end face of the machine body, and a downward hydraulic cylinder is fixedly connected to the inner wall of each hydraulic support. The bottom end of each downward hydraulic cylinder is fixedly connected to the side end face of the pile clamping box. A pile clamping mechanism is fixedly installed inside the pile clamping box. in, The downward hydraulic cylinder includes a downward cylinder body and a downward telescopic end, and the downward telescopic end is connected to the pile clamping box body; The feature is that the lower end of the downward pressing telescopic end is fixedly connected to a telescopic connector, and the side end face of the clamping pile box is fixedly connected to a box connector, and the telescopic connector is connected to the box connector; Specifically, when the resistance encountered by the prestressed pipe pile during descent does not exceed the preset value, the expansion joint and the box-type connecting member move synchronously; when the resistance encountered by the prestressed pipe pile during descent exceeds the preset value, the expansion joint and the box-type connecting member move relative to each other. The telescopic connector is configured as a column with a square cross-section, and the box connector is provided with a stress relief groove, the shape and size of which match the telescopic connector. The telescopic connector has a sliding groove on its side, and telescopic teeth are slidably provided in the sliding groove. A spring element is also provided inside the sliding groove, with one end of the spring element connected to the telescopic tooth and the other end connected to the bottom surface of the sliding groove. The sidewall of the unloading groove is provided with meshing tooth grooves, and the shape and size of the meshing tooth grooves match the telescopic teeth; The number of telescopic teeth is set to multiple, and the number of meshing tooth grooves is greater than the number of telescopic teeth.

2. The installation auxiliary device for prestressed pipe piles according to claim 1, characterized in that, The spring element is configured to consist of a mechanical helical spring and an electric spring connected in series.

3. The installation auxiliary device for prestressed pipe piles according to claim 1, characterized in that, The pile clamping mechanism includes four pile clamping hydraulic cylinders arranged in a circular array, and the bottom of the pile clamping cylinder body is fixedly installed on the inner side wall of the pile clamping box. The top of the pile clamping extension end of the pile clamping hydraulic cylinder is connected to a pile clamping jaw, and the shape and size of the jaw end of the pile clamping jaw are matched with the prestressed pipe pile.

4. The installation auxiliary device for prestressed pipe piles according to claim 3, characterized in that, The end of the pile clamping telescopic end is also fitted with a pile clamping protection element, and the end of the pile clamping protection element away from the pile clamping telescopic end is fixedly connected to the pile clamping jaws. When the pair of horizontal or vertical clamping jaws do not cause clamping displacement, the pair of vertical or horizontal clamping protection elements move synchronously with the clamping telescopic end. When the pair of horizontal or vertical pile clamping jaws shifts, the pair of vertical or horizontal pile clamping protection elements move relative to the pile clamping extension end. The pile clamping mechanism also includes auxiliary pile clamping hydraulic cylinders arranged in a circumferential array. The bottom of the auxiliary cylinder body of the auxiliary pile clamping hydraulic cylinder is fixedly installed on the inner side wall of the pile clamping box, and the top of the auxiliary telescopic end of the auxiliary pile clamping hydraulic cylinder is fixedly connected to the pile clamping jaw.

5. The installation auxiliary device for prestressed pipe piles according to claim 4, characterized in that, The expansion joint of the pile clamp is configured as a column with a circular cross-section. The pile clamp protection element is provided with a correction protection groove, and the shape and size of the correction protection groove are matched with the expansion joint of the pile clamp. The side of the correction protection groove is provided with a telescopic groove, and a telescopic hemisphere is slidably installed inside the telescopic groove. A spring is also installed inside the telescopic groove, with one end of the spring connected to the telescopic hemisphere and the other end connected to the bottom surface of the telescopic groove. The side of the expansion joint of the pile is provided with a hemispherical groove, and the shape and size of the hemispherical groove match the expansion hemisphere.

6. The installation auxiliary device for prestressed concrete pipe piles according to claim 5, characterized in that, Distance sensors and / or pressure sensors are also installed inside the expansion joint.

7. The installation auxiliary device for prestressed pipe piles according to claim 5, characterized in that, The number of telescopic hemispheres is set to multiple, and the number of hemispherical slots is greater than the number of telescopic hemispheres.

8. The installation auxiliary device for prestressed concrete pipe piles according to any one of claims 1-7, characterized in that, A crane mounting base is fixedly installed on the upper end of the machine body, a slewing seat is installed on the upper end of the crane mounting base, and a crane is installed on the upper end of the slewing seat. The crane includes a hydraulic rod, and a winding machine is rotatably connected to the top of the hydraulic rod. A wire rope is fixedly connected to the outer surface of the winding machine, and a hook lock is fixedly connected to the bottom of the wire rope. The sides of the fuselage are fixedly connected to a running gear, and the bottom of the fuselage is fixedly connected to a short boat.

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