A weak foundation sand replacement device

Abstract

The application relates to the technical field of foundation replacement, in particular to a soft foundation sandstone replacement device. The device comprises an excavator body, a walking mechanism arranged at the bottom of the excavator body, a large arm and a large arm telescopic part hingedly connected to the excavator body, a small arm and a small arm telescopic part hingedly connected to the large arm, a bucket and a bucket telescopic part hingedly connected to the small arm, the bucket being arranged in a fan shape and provided with openings at both ends of the arc of the fan shape, and a partition plate rotatably connected to the inside of the bucket. The device can fill sandstone through the opening on one side and excavate soft soil layer through the opening on the other side, and the sandstone can be immediately backfilled, leveled and compacted after the soft soil layer is excavated, so that the collapse during the excavation process is avoided, the construction efficiency is improved, and the construction effect is ensured. The device is designed in a skillful structure, realizes synchronous excavation and backfilling, provides an efficient solution for soft foundation treatment, reduces construction risks and costs, and improves engineering quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation replacement, in particular to a soft foundation sand replacement device. BACKGROUND

[0002] In engineering and infrastructure construction, especially in water conservancy construction, soft foundation is often formed due to high water content and large pore ratio of the foundation. The bearing capacity of soft foundation is low, and the stability is poor, which can easily lead to building settlement, tilting and even destruction. Sand replacement is a common method for treating soft foundation, which can improve the bearing capacity and stability of the foundation by removing the soft soil layer and backfilling sandstone materials with certain strength and stability.

[0003] In related technologies, the existing excavation equipment is often limited in excavation efficiency when facing soft foundation. Due to the characteristics of soft soil layer, it is difficult to immediately backfill after excavating the original soft soil layer, so collapse is prone to occur during excavation, which affects the construction efficiency and backfill effect.

[0004] Therefore, how to avoid collapse during excavation and ensure the construction efficiency and backfill effect of sand replacement method is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] In order to avoid collapse during excavation and ensure the construction efficiency and backfill effect of sand replacement method, the present application provides a soft foundation sand replacement device.

[0006] The soft foundation sand replacement device provided by the present application adopts the following technical scheme:

[0007] A soft foundation sand replacement device, comprising an excavator body, a walking mechanism is arranged at the bottom of the excavator body, a large arm and a large arm telescopic piece are hingedly connected to the excavator body, a small arm and a small arm telescopic piece are hingedly connected to the large arm, a bucket and a bucket telescopic piece are hingedly connected to the small arm, an L-shaped extension arm is fixedly connected to the bucket, the L-shaped extension arm is hingedly connected to the bucket telescopic piece, the bucket is arranged in a fan shape, and openings are arranged at both ends of the arc of the fan shape, and a partition plate is rotatably connected inside the bucket.

[0008] By adopting the above technical solution, the walking mechanism can be used to drive the excavator body to move as a whole, the boom telescopic member can drive the boom to swing, the forearm telescopic member can drive the forearm to swing, and the bucket telescopic member can drive the bucket to swing. The coordinated actions of the boom, the forearm and the bucket can realize excavation and filling construction. Before excavating the soft foundation, the partition is swung to the opening on the bucket close to the side of the excavator body and is sealed. In this way, the sand and gravel for replacement are contained in the bucket, and when the soft foundation is excavated, the partition is swung to the opening on the bucket close to the side of the excavator body and is sealed. During excavation, the soil of the soft foundation is dug out through the coordinated action of the upper arm, the lower arm and the bucket. At the same time, the partition will rotate relative to the bucket during the excavation process, and the sand and gravel originally contained in the bucket will be filled into the pit formed by the excavated soft soil. At the same time, the sand and gravel filled in the pit will be leveled and preliminarily compacted through the outer side of the bucket away from its rotation center. In this way, it is difficult to backfill sand and gravel and level and compact them immediately after excavating the original soft soil layer, which can effectively avoid collapse during the excavation process, improve the construction efficiency of backfilling sand and gravel, and ensure the construction effect of backfilling sand and gravel.

[0009] Furthermore, the bucket is rotatably connected to a swing shaft near the rotation center connected to the small arm, the partition is fixedly connected to the swing shaft, and both ends of the swing shaft pass through the position outside the bucket and are fixedly connected to a large gear. The bucket is rotatably connected to a gear shaft corresponding to the large gear, and the gear shaft meshes with the large gear. One end of the gear shaft located inside the bucket is fixedly connected to a driving cylinder, and a plurality of annular transmission grooves are provided inside the driving cylinder. A driving body is rotatably connected inside the driving cylinder, and an installation groove corresponding to the transmission groove is provided on the driving body. A tension spring is fixedly connected to the interior of the installation groove, and a driving block is slidably connected to the interior of the installation groove. The driving block is fixedly connected to the tension spring, and a first driving member is installed inside the bucket corresponding to the driving body, and the first driving member is fixedly connected to the two driving bodies at the same time.

[0010] By adopting the above technical solution, the first driving member can simultaneously drive the two driving bodies and the driving block inside the installation groove to rotate, and the driving block will overcome the tension of the tension spring under the action of centrifugal force and slide out of the installation groove. When the driving block slides out of the installation groove, it will enter the transmission groove, and then drive the driving cylinder to rotate through the driving block, and finally drive the partition to swing through the gear shaft and the large gear. The swing of the partition can not only improve the efficiency of loading or discharging sand and gravel, but also improve the efficiency of excavating or pouring out soil, further improving the construction efficiency of backfilling sand and gravel.

[0011] Furthermore, the inner side surface of the bucket away from its rotation center is set as an inner arc surface, the center of the inner arc surface coincides with the rotation center of the partition, and the end of the partition away from its rotation center slides in contact with the inner arc surface.

[0012] By adopting the above technical solution, the design of the inner arc surface can better cooperate with the rotation of the partition, so that the inside of the bucket can be cleaned during the rotation of the partition.

[0013] Furthermore, a limit is set on the bucket at the opening corresponding to the partition, and the side of the limit close to the partition is set as a plane, and the side of the limit away from the partition is set as an inclined surface.

[0014] By adopting the above technical solution, the partition can be restricted inside the bucket by utilizing the limit, thereby preventing the partition from accidentally falling out and ensuring stability and reliability during the construction process.

[0015] Furthermore, the opening is fixedly connected to a position away from the rotation center of the bucket with a symmetrically arranged first digging tooth and a second digging tooth. The first digging tooth is located on the side of the bucket close to the excavator body, and the second digging tooth is located on the side of the bucket away from the excavator body. The first digging tooth is provided with an arc end for easy insertion into the soft foundation soil layer, and the second digging tooth is provided with a pointed end for easy insertion of sand and gravel replacement material.

[0016] By adopting this technical solution, the rounded end design of the first digging tooth allows for smoother insertion when contacting soft foundation soil layers. The pointed tip design of the second digging tooth ensures that the bucket can quickly and accurately grab sand and gravel, increasing the speed of backfill operations. This optimized design for different working conditions can enhance excavation performance, thereby improving excavation efficiency while also enhancing the adaptability of excavation operations.

[0017] Furthermore, the outer side surface of the bucket away from its rotation center is set as an outer arc surface, and a sliding plate is fixedly connected to the bucket and fits with the outer arc surface. The side of the sliding plate away from the outer arc surface forms a special-shaped surface according to the thickness change of the sliding plate. The special-shaped surface includes at least a second arc surface, the radius of the outer arc surface is smaller than the radius of the second arc surface, and the second arc surface is tangent to the outer arc surface at one end close to the excavator body.

[0018] By adopting the above technical solution, the sliding plate can be used to simultaneously squeeze the pit surface formed after the soil layer is excavated during the excavation construction process. As the bucket rotates, the sliding plate will slide on the pit surface formed after the soil layer is excavated, and the change in thickness of the sliding plate will form an extrusion force on the pit surface. On the one hand, it can expand the volume of the pit to facilitate sand and gravel to enter the pit better, and on the other hand, it can compact the soil in the pit, thereby improving the structural strength of the foundation.

[0019] Furthermore, a tamping plate is hingedly connected to the bottom of the excavator body, a rocker arm is fixedly connected to the tamping plate, a rocker arm telescopic part is hingedly connected to the excavator body corresponding to the rocker arm, the rocker arm telescopic part is hingedly connected to the rocker arm, and a tamping mechanism is installed on the tamping plate.

[0020] By adopting the above technical solution, the rocker arm telescopic member can be used to drive the tamping plate to swing through the rocker arm, so that the tamping plate can be lifted by the rocker arm telescopic member during normal travel to prevent the tamping mechanism from affecting the normal travel of the entire excavator body. During the construction process, the tamping plate can also be pressed down by the rocker arm telescopic member to facilitate the tamping mechanism to compact the foundation.

[0021] Furthermore, the ramming mechanism includes a ramming plate body, an elastic connecting piece is provided between the ramming plate body and the ramming plate, the ramming plate body is hingedly connected to the elastic connecting piece, a second driving piece is installed inside the ramming plate body, an eccentric block is installed on the output shaft of the second driving piece, and the ramming plate body is fixedly connected to a ramming seat away from the elastic connecting piece.

[0022] By adopting this technical solution, the second driving member can drive the eccentric mass to rotate. The centrifugal force generated during the rotation of the eccentric mass causes the tamping plate body to produce periodic vibrations and impact forces. The impact force generated by the eccentric mass can reduce the gaps between sand and gravel particles, increase the contact area and friction between the particles, and thus improve the bearing capacity and stability of the foundation.

[0023] Furthermore, the elastic connecting member includes a cylinder, which is fixedly connected to the ramming plate, and a slider is slidably connected to the inside of the cylinder. The upper and lower ends of the slider are both provided with springs that abut against the inner end of the cylinder. The slider is fixedly connected to a connecting rod that passes through one of the springs, and the connecting rod passes through one end of the outside of the cylinder and is hingedly connected to the ramming plate body.

[0024] By adopting the technical scheme, the cylinder can provide a stable working environment for the sliding block and the spring, the cylinder limits the movement direction of the sliding block, so that the sliding block can only slide up and down inside the cylinder. This helps to improve the reliability and stability of the ramming mechanism, prevents the sliding block from deviating or shaking during work, and ensures the consistency of the buffering effect. The spring can absorb and store part of the energy through elastic deformation, thereby effectively reducing the impact of the reaction force on the ramming plate and the mounting structure. This can reduce the vibration amplitude of the equipment, thereby avoiding damage to the mounting structure, and is beneficial to improve the service life of the ramming mechanism.

[0025] Further, the large arm telescopic part, the small arm telescopic part and the bucket telescopic part are all configured as hydraulic telescopic cylinders.

[0026] By adopting the technical scheme, the hydraulic telescopic cylinder can not only provide strong output force, but also stable output force, which is beneficial to ensure that the excavation process is more stable and reduces the impact on the equipment and the surrounding environment. Moreover, the hydraulic telescopic cylinder responds quickly and can be quickly extended and retracted. This makes the excavator more flexible in responding to various changes during operation, further ensuring the work efficiency of the sand and gravel replacement construction.

[0027] The beneficial effects achieved are:

[0028] The bucket is set as a fan shape, and the partition plate is rotatably connected to the inside of the bucket in a fan shape, and symmetrical openings are provided. The sand and gravel can be filled through one side of the opening, and the soft soil layer can be excavated through the other side of the opening. After excavating the soft soil layer, the sand and gravel can be immediately backfilled and compacted, avoiding collapse during excavation and improving construction efficiency and ensuring construction effect. The application realizes synchronous excavation and backfilling through ingenious structural design, provides an efficient solution for soft foundation treatment, reduces construction risk and cost, and improves engineering quality. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of an embodiment of the application.

[0030] Figure 2 is a schematic diagram of the structure of an embodiment of the application.

[0031] Figure 3 is a schematic diagram of the internal structure of an embodiment of the application.

[0032] Figure 4 is a schematic diagram of the structure of the bucket in an embodiment of the application.

[0033] Figure 5 is Figure 4 A magnified schematic diagram of the structure of Part I.

[0034] Figure 6 This is a schematic diagram of the installation structure of the bucket in one embodiment of the present application.

[0035] Figure 7 yes Figure 6 Schematic diagram of the AA-axis cross-section structure.

[0036] Figure 8 It is a schematic diagram of the structural decomposition of the tamping mechanism in one embodiment of the present application.

[0037] Figure 9 yes Figure 7 Schematic diagram of the enlarged structure of Part II.

[0038] Explanation of reference numerals: 100, excavator body; 101, walking mechanism; 102, boom; 103, boom telescopic member; 104, arm; 105, arm telescopic member; 106, bucket; 107, bucket telescopic member; 108, L-shaped extension arm; 109, opening; 110, partition; 111, swing shaft; 112, large gear; 113, gear shaft; 114, inner arc surface; 115, limit; 1152, plane; 1151, inclined surface; 116, first digging tooth; 117, second digging tooth; 118, outer arc surface; 119, sliding plate; 12 0. Special-shaped surface; 1201. First circular arc surface; 1202. Second circular arc surface; 121. Driving cylinder; 122. Transmission groove; 123. Driving body; 124. Mounting groove; 125. Tension spring; 126. Driving block; 127. First driving member; 200. Ramming plate; 201. Rocker arm; 202. Rocker arm telescopic member; 300. Ramming mechanism; 301. Ramming plate body; 302. Second driving member; 303. Eccentric block; 304. Ramming seat; 400. Elastic connecting member; 401. Cylinder; 402. Sliding block; 403. Spring; 404. Connecting rod. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-9 This application is described in further detail.

[0040] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0042] The embodiment of the present application discloses a device for replacing sand and gravel in a soft foundation.

[0043] Please refer to Figures 1 to 9 In one embodiment of the present application, a soft foundation gravel replacement device includes an excavator body 100. A traveling mechanism 101 is provided at the bottom of the excavator body 100. The traveling mechanism 101 can drive the entire excavator body 100 to move. The traveling mechanism 101 is configured as a crawler-type traveling mechanism. The crawler tracks of the crawler-type traveling mechanism have a large contact area with the ground, which can evenly distribute the weight of the equipment over a large area, thereby reducing the pressure on the ground. This enables the crawler-type traveling mechanism to travel on soft ground, such as sand and mud, and on ground with low load-bearing capacity, without sinking.

[0044] It is understood that in other embodiments of the present application, the traveling mechanism 101 can also be configured as a variety of non-slip and load-bearing traveling mechanisms, such as tire-type, track-type, and special terrain traveling mechanisms. A tire-type traveling mechanism can use wide-base tires or a combination of multiple tires. The use of an ultra-wide tire design can increase the contact area with the ground, thereby improving the load-bearing capacity. Furthermore, the tire surface is provided with anti-slip grooves to enhance the anti-slip performance. The use of a multiple-tire combination can disperse the overall weight of the excavator body 100, thereby improving the load-bearing capacity.

[0045] Please refer to Figures 1 to 9 In one embodiment of the present application, a boom 102 is hingedly connected to the excavator body 100, and two boom telescopic parts 103 hingedly connected to the excavator body 100 are symmetrically arranged on both sides of the boom 102. The boom telescopic part 103 and the end of the boom 102 away from the excavator body 100 are hingedly connected to each other. By controlling the boom telescopic part 103 to extend and retract, the boom 102 can be driven to swing.

[0046] Please refer to Figures 1 to 9In one embodiment of the present application, a small arm 104 and a small arm telescopic member 105 are hingedly connected to the upper arm 102, and the small arm 104 and the small arm telescopic member 105 are also hingedly connected to each other at one end away from the upper arm 102. By controlling the small arm telescopic member 105 to extend and retract, the small arm 104 can be driven to swing.

[0047] Please refer to Figures 1 to 9 In one embodiment of the present application, a bucket 106 and a bucket telescopic member 107 are hingedly connected to the arm 104, and two symmetrically arranged L-shaped extension arms 108 are fixedly connected to the bucket 106. The L-shaped extension arms 108 are hingedly connected to the bucket telescopic member 107. Figure 3 As shown, the design of the L-shaped extension arm 108 reduces the interference between the bucket telescopic member 107 and the bucket 106 when the bucket telescopic member 107 contracts and drives the bucket 106 to rotate along the F direction, thereby increasing the rotation angle of the bucket 106.

[0048] Please refer to Figures 1 to 9 In one embodiment of the present application, the bucket 106 is arranged in a fan shape and is provided with openings 109 at both ends of the fan-shaped arc. The internal rotation of the bucket 106 is connected to a partition 110. The design of the partition 110 can form a bottom seal at one of the openings 109 of the bucket 106 as needed, and open the other opening 109 at the same time. In this way, one material can be loaded and another material can be unloaded at the same time, which not only reduces repetitive work, but also saves time and energy, which is conducive to improving the efficiency of loading and unloading.

[0049] Please refer to Figures 1 to 9 In a specific embodiment of the present application, the boom telescopic member 103, the arm telescopic member 105, and the bucket telescopic member 107 are all configured as hydraulic telescopic cylinders. The hydraulic telescopic cylinder not only provides a strong output force, but also has a stable output force, which helps to ensure a smoother excavation process and reduce the impact on the equipment and the surrounding environment. In addition, the hydraulic telescopic cylinder has a quick response and can achieve rapid extension and retraction. This allows the excavator to respond more flexibly to various changes during operation, further ensuring the efficiency of sand and gravel replacement construction.

[0050] It can be understood that in other specific embodiments of the present application, the boom telescopic member 103, the arm telescopic member 105, and the bucket telescopic member 107 can also be configured as other devices or structures that can achieve linear motion, such as screw transmission, rack and pinion transmission, linear guide rails and pneumatic cylinders.

[0051] During the replacement construction process of the weak foundation, the excavation and filling construction can be realized by combining the coordinated actions of the upper arm 102, the lower arm 104, and the bucket 106. Before excavating the weak foundation, the partition 110 is swung to the opening 109 on the bucket 106 close to the side of the excavator body 100 and sealed, and then the sand and gravel for replacement are placed inside the bucket 106. When excavating the weak foundation, the soil of the weak foundation is dug out through the coordinated actions of the upper arm 102, the lower arm 104, and the bucket 106. At the same time, the partition 110 will rotate relative to the bucket 106 during the excavation process, and fill the sand and gravel originally contained in the bucket 106 into the pit formed by the excavated soft soil, and at the same time, the sand and gravel filled in the pit are leveled and preliminarily compacted through the outer side of the bucket 106 away from its rotation center. In this way, it is difficult to backfill sand and gravel and level and compact it immediately after excavating the original soft soil layer. This can not only effectively avoid collapse during the excavation process, but also improve the construction efficiency of backfilling sand and gravel, and ensure the construction effect of backfilling sand and gravel.

[0052] Please refer to Figures 1 to 9 In one embodiment of the present application, a swing shaft 111 is rotatably connected to the bucket 106 near the rotation center connected to the arm 104. The partition 110 and the swing shaft 111 are fixedly connected to form a whole by welding. Both ends of the swing shaft 111 pass through the position outside the bucket 106 and are fixedly connected to a large gear 112. The bucket 106 is rotatably connected to the corresponding large gear 112. The gear shaft 113 is meshed with the large gear 112 to form a reduction transmission. The end of the gear shaft 113 located inside the bucket 106 is fixedly connected to a drive shaft. Cylinder 121, a plurality of annular evenly distributed transmission grooves 122 are opened inside the driving cylinder 121, a driving body 123 is rotatably connected inside the driving cylinder 121, and a mounting groove 124 corresponding to the transmission groove 122 is opened on the driving body 123, a tension spring 125 is fixedly connected inside the mounting groove 124, and a driving block 126 is slidably connected inside the mounting groove 124, and the driving block 126 is fixedly connected to the tension spring 125, and a first driving member 127 is installed inside the bucket 106 corresponding to the driving body 123, and the first driving member 127 is fixedly connected to the two driving bodies 123 at the same time.

[0053] During operation, the tension spring 125 will naturally pull the drive block 126 into the interior of the mounting groove 124. In this way, when the partition 110 rotates relative to the bucket 106 during the excavation process, it will drive the large gear 112, the gear shaft 113 and the drive cylinder 121 to rotate instead of reversely driving the first drive member 127 through the drive block 126, thereby ensuring the stability and reliability of the first drive member 127. When the first driving member 127 is working, the first driving member 127 will simultaneously drive the two driving bodies 123 and the driving block 126 inside the mounting groove 124 to rotate, and the driving block 126 will overcome the pulling force of the tension spring 125 under the action of centrifugal force and slide out of the mounting groove 124. When the driving block 126 slides out of the mounting groove 124, it will enter the transmission groove 122, and then drive the driving cylinder 121 to rotate through the driving block 126, and finally drive the partition 110 to swing through the gear shaft 113 and the large gear 112. The swing of the partition 110 can sweep the sand and gravel filling or soft soil layer inside the bucket 106 out of the bucket 106, thereby improving the work efficiency of pouring out soft soil layers or sand and gravel filling during sand and gravel replacement construction.

[0054] In a specific embodiment of the present application, the first drive member 127 is configured as a dual-axle extension motor, and the dual-axle extension motor is fixedly connected to the two drive blocks 126 at the same time. The dual-axle extension motor, as the first drive member 127, is fixedly connected to the two drive blocks 126 at the same time, and can provide symmetrical power. This symmetry ensures that the driving bodies 123 on both sides are evenly stressed. The use of a dual-axle extension motor allows for a more reasonable arrangement of the power transmission structure within the limited internal space of the bucket. Since the two shafts of the motor are directly connected to the drive blocks 126, no additional space is required to set up a complex power distribution device, making the entire structure more compact.

[0055] Please refer to Figures 1 to 9 In one embodiment of the present application, the inner side surface of bucket 106, away from its rotation center, is configured as an inner arc surface 114. The center of inner arc surface 114 coincides with the rotation center of partition 110, and the end of partition 110, away from its rotation center, slides in contact with inner arc surface 114. The design of inner arc surface 114 better matches the rotation of partition 110, allowing the interior of bucket 106 to be cleaned during the rotation of partition 110.

[0056] Please refer to Figures 1 to 9In one embodiment of the present application, a limiter 115 is provided on the bucket 106 at the opening 109 corresponding to the partition 110. The side of the limiter 115 close to the partition 110 is provided with a flat surface 1152, and the side of the limiter 115 away from the partition 110 is provided with an inclined surface 1151. The flat surface 1152 designed on the limiter 115 can confine the partition 110 inside the bucket 106, preventing the partition 110 from accidentally falling out, ensuring stability and reliability during construction. The inclined surface 1151 designed on the limiter 115 can reduce the resistance to material entering the bucket 106 when excavating soil or loading filler.

[0057] Please refer to Figures 1 to 9 In one embodiment of the present application, a first digging tooth 116 and a second digging tooth 117 are fixedly connected to the opening 109 at a position away from the rotation center of the bucket 106. The first digging tooth 116 is located on the side of the bucket 106 close to the excavator body 100, and the second digging tooth 117 is located on the side of the bucket 106 away from the excavator body 100. The first digging tooth 116 is provided with an arc end that is convenient for inserting into the soft foundation soil layer. The arc end design on the first digging tooth 116 enables it to be inserted more smoothly when contacting the soft foundation soil layer. The second digging tooth 117 is provided with a tip that is convenient for inserting sand and gravel replacement. The tip design on the second digging tooth 117 can ensure that the bucket can quickly and accurately grab sand and gravel, which increases the speed of the replacement operation. Such an optimized design for different working conditions can improve the excavation performance, thereby improving the excavation efficiency while also helping to improve the adaptability of excavation construction.

[0058] Please refer to Figures 1 to 9 In one embodiment of the present application, the outer side surface of the bucket 106 away from its rotation center is set as an outer arc surface 118, and a sliding plate 119 is fixedly connected to the bucket 106 and fits with the outer arc surface 118. The side of the sliding plate 119 away from the outer arc surface 118 forms a special-shaped surface 120 according to the thickness change of the sliding plate 119. The special-shaped surface 120 is composed of a first arc surface 1201 and a second arc surface 1202 with two different radii. The radius of the first arc surface 1201 is smaller than the radius of the second arc surface 1202, and the radius of the outer arc surface 118 is also smaller than the radius of the second arc surface 1202. The first arc surface 1201 is located on the side of the bucket 106 away from the excavator body 100, and the second arc surface 1202 is located on the side of the bucket 106 away from the excavator body 100. The end of the second arc surface 1202 close to the excavator body 100 is tangent to the outer arc surface 118.

[0059] During the replacement construction process of the weak foundation, as the bucket 106 rotates, the sliding plate 119 will slide on the pit surface formed after the soil layer is excavated, and the change in thickness of the sliding plate 119 will form an extrusion pressure on the pit surface. On the one hand, it can expand the volume of the pit to facilitate sand and gravel to enter the pit better, and on the other hand, it can compact the soil in the pit, thereby improving the structural strength of the foundation.

[0060] Please refer to Figures 1 to 9 In one embodiment of the present application, a tamping plate 200 is hingedly connected to the bottom of the excavator body 100, and a rocker arm 201 is fixedly connected to the tamping plate 200. A rocker arm telescopic member 202 is hingedly connected to the corresponding rocker arm 201 on the excavator body 100. The rocker arm telescopic member 202 is hingedly connected to the rocker arm 201. The rocker arm telescopic member 202 can drive the tamping plate 200 to swing through the rocker arm 201, so that the tamping plate 200 can be lifted by the rocker arm telescopic member 202 during normal travel, so as to avoid the tamping mechanism 300 affecting the normal travel of the excavator body 100 as a whole.

[0061] Please refer to Figures 1 to 9 In one embodiment of the present application, a tamping mechanism 300 is installed on the tamping plate 200. The tamping mechanism 300 includes a tamping plate body 301, an elastic connecting member 400 is provided between the tamping plate body 301 and the tamping plate 200, the tamping plate body 301 is hingedly connected to the elastic connecting member 400, two symmetrically arranged second driving members 302 are installed inside the tamping plate body 301, and an eccentric block 303 is installed on the output shaft of each of the second driving members 302. A tamping seat 304 is fixedly connected to the tamping plate body 301 away from the elastic connecting member 400.

[0062] During construction, the rocker arm telescopic member 202 can also be used to press down the tamping plate 200, allowing the tamping mechanism 300 to compact the foundation. Adjusting the telescopic length of the rocker arm telescopic member 202 can also control the distance the tamping plate 200 is pressed down, allowing the backfill foundation to be compacted according to actual working conditions. During the compaction process, the second driving member 302 can drive the eccentric block 303 to rotate. The centrifugal force generated by the rotation of the eccentric block 303 causes the tamping plate body 301 to produce periodic vibrations and impact force. The impact force generated by the eccentric block 303 can reduce the gaps between the sand and gravel particles, increase the contact area and friction between the particles, and thus improve the bearing capacity and stability of the foundation.

[0063] In an embodiment of the present application, the rocker telescopic part 202 is configured as a hydraulic telescopic cylinder. The hydraulic telescopic cylinder not only can provide strong output force, but also the output force of the hydraulic telescopic cylinder is stable, which is conducive to ensuring that the excavating process is more stable to drive the rocker 201 and the rammer plate 200 to swing. Thus, the stability and reliability of the rammer plate 200 in the working process are ensured.

[0064] It can be understood that, in other embodiments of the present application, the rocker telescopic part 202 can also be configured as other devices or structures capable of realizing linear motion, such as a lead screw transmission, a rack and pinion transmission, a linear guide rail, and a pneumatic cylinder, etc.

[0065] In an embodiment of the present application, the second driving part 302 is configured as a hydraulic motor. The hydraulic motor not only can generate strong output torque, but also is suitable for high-load work. When dealing with weak foundation sand replacement, it can easily overcome resistance to compact sand. Compared with other driving devices, it has obvious advantages in output torque, can ensure that the ramming mechanism has enough power to complete the task, and the output is stable, so that the ramming force is more uniform, improves the construction quality, reduces equipment vibration and noise, and prolongs the service life. Moreover, the hydraulic motor has good speed regulation performance. Stepless speed regulation can be realized by adjusting the flow of the hydraulic system to meet the requirements of different construction scenes for ramming frequency and speed. In order to adjust the speed according to the nature of the foundation and the compaction requirements, the best ramming effect is obtained, and the ramming force can be accurately controlled to meet the high-precision construction requirements. At the same time, the hydraulic motor has high reliability, can adapt to harsh environments, has strong overload capacity, and can automatically adjust the output torque when encountering hard obstacles or suddenly increasing load to ensure normal operation of the equipment. The working environment requirement is low, and the equipment can reliably operate in high temperature, high humidity, and dusty harsh conditions, which is conducive to ensuring the service life of the equipment.

[0066] It can be understood that, in other embodiments of the present application, the second driving part 302 can also be configured as a pneumatic motor, an electric motor, an engine, and other devices or mechanisms capable of providing strong power.

[0067] Please refer to Figures 1 to 9In one embodiment of the present application, the elastic connector 400 includes a cylinder 401, which is fixedly connected to the tamping plate 200. A slider 402 is slidably connected to the inside of the cylinder 401. The cylinder 401 can provide a stable working environment for the slider 402 and the spring 403. The cylinder 401 limits the movement direction of the slider 402, so that the slider 402 can only slide up and down inside the cylinder. This helps to improve the reliability and stability of the tamping mechanism 300. The upper and lower ends of the slider 402 are both provided with springs 403 that abut against the inner end of the cylinder 401. The slider 402 is fixedly connected to a connecting rod 404 that passes through the inside of one of the springs 403. The connecting rod 404 extends to the outside of the cylinder 401 and is hingedly connected to the tamping plate body 301. The slider 402 is prevented from deflecting or shaking during operation, thereby ensuring the consistency of the buffering effect. The spring 403 can absorb and store part of the energy through elastic deformation, thereby effectively reducing the impact of the reaction force on the tamping plate 200 and the mounting structure. This can reduce the vibration amplitude of the equipment, thereby avoiding damage to the mounting structure and helping to increase the service life of the tamping mechanism 300.

[0068] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A soft foundation sand and gravel replacement device, characterized by: The invention comprises an excavator body (100), wherein a walking mechanism (101) is provided at the bottom of the excavator body (100), a large arm (102) and a large arm telescopic member (103) are hingedly connected to the excavator body (100), a small arm (104) and a small arm telescopic member (105) are hingedly connected to the large arm (102), a bucket (106) and a bucket telescopic member (107) are hingedly connected to the small arm (104), an L-shaped extension arm (108) is fixedly connected to the bucket (106), and the L-shaped extension arm (108) is hingedly connected to the bucket telescopic member (107), the bucket (106) is fan-shaped and has openings (109) at both ends of the fan-shaped arc, and the interior of the bucket (106) is rotatably connected to a partition (110); a swing shaft (111) is rotatably connected to the bucket (106) near the rotation center connected to the small arm (104), the partition (110) is fixedly connected to the swing shaft (111), and both ends of the swing shaft (111) pass through the bucket (106) ) are fixedly connected to the outer position of the bucket (106), and a gear shaft (113) is rotatably connected to the bucket (106) corresponding to the gear shaft (113). The gear shaft (113) is meshed with the gear shaft (112). One end of the gear shaft (113) located inside the bucket (106) is fixedly connected to a driving cylinder (121). A plurality of transmission grooves (122) evenly distributed in an annular manner are provided inside the driving cylinder (121). A driving body (123) is rotatably connected to the driving cylinder (121). The moving body (123) is provided with a mounting groove (124) corresponding to the transmission groove (122); a tension spring (125) is fixedly connected to the interior of the mounting groove (124); a driving block (126) is slidably connected to the interior of the mounting groove (124); the driving block (126) is fixedly connected to the tension spring (125); a first driving member (127) is installed inside the bucket (106) corresponding to the driving body (123); and the first driving member (127) is fixedly connected to the two driving bodies (123) at the same time.

2. The soft foundation sand and gravel replacement device according to claim 1, characterized in that: The inner side surface of the bucket (106) away from its rotation center is set as an inner arc surface (114), the center of the inner arc surface (114) coincides with the rotation center of the partition (110), and the end of the partition (110) away from its rotation center fits and slides with the inner arc surface (114).

3. The soft foundation sand and gravel replacement device according to claim 1, characterized in that: A limit position (115) is provided on the bucket (106) at the opening (109) corresponding to the partition (110), wherein the side of the limit position (115) close to the partition (110) is provided as a plane, and the side of the limit position (115) away from the partition (110) is provided as an inclined surface.

4. The soft foundation sand and gravel replacement device according to claim 1, characterized in that: A first digging tooth (116) and a second digging tooth (117) are fixedly connected to the opening (109) at a position away from the rotation center of the bucket (106), wherein the first digging tooth (116) is located on a side of the bucket (106) close to the excavator body (100), and the second digging tooth (117) is located on a side of the bucket (106) away from the excavator body (100). The first digging tooth (116) is provided with an arc end for easy insertion into a soft foundation soil layer, and the second digging tooth (117) is provided with a pointed end for easy insertion into sand and gravel replacement material.

5. The soft foundation sand and gravel replacement device according to claim 1, characterized in that: The outer side surface of the bucket (106) away from its rotation center is set as an outer arc surface (118), and a sliding plate (119) is fixedly connected to the bucket (106) and is in contact with the outer arc surface (118). The side of the sliding plate (119) away from the outer arc surface (118) forms a special-shaped surface (120) according to the thickness change of the sliding plate (119), and the special-shaped surface (120) includes at least a second arc surface (1202), the radius of the outer arc surface (118) is smaller than the radius of the second arc surface (1202), and the second arc surface (1202) is tangent to the outer arc surface (118) at one end close to the excavator body (100).

6. The soft foundation sand and gravel replacement device according to claim 1, characterized in that: The bottom of the excavator body (100) is hingedly connected to a tamping plate (200), a rocker arm (201) is fixedly connected to the tamping plate (200), a rocker arm telescopic member (202) is hingedly connected to the excavator body (100) corresponding to the rocker arm (201), the rocker arm telescopic member (202) is hingedly connected to the rocker arm (201), and a tamping mechanism (300) is installed on the tamping plate (200).

7. The soft foundation sand and gravel replacement device according to claim 6, characterized in that: The ramming mechanism (300) comprises a ramming plate body (301), an elastic connecting member (400) is provided between the ramming plate body (301) and the ramming plate (200), the ramming plate body (301) is hingedly connected to the elastic connecting member (400), a second driving member (302) is installed inside the ramming plate body (301), an eccentric block (303) is installed on the output shaft of the second driving member (302), and the ramming plate body (301) is fixedly connected to a ramming seat (304) away from the elastic connecting member (400).

8. The soft foundation sand and gravel replacement device according to claim 7, characterized in that: The elastic connecting member (400) comprises a cylinder (401), the cylinder (401) being fixedly connected to the tamping plate (200), a slider (402) being slidably connected inside the cylinder (401), springs (403) being provided at both upper and lower ends of the slider (402) for contact with the inner end of the cylinder (401), a connecting rod (404) being fixedly connected to the slider (402) and passing through one of the springs (403), and one end of the connecting rod (404) extending through the outside of the cylinder (401) being hingedly connected to the tamping plate body (301).

9. A soft foundation sand and gravel replacement device according to any one of claims 1 to 8, characterized in that: The boom telescopic member (103), the arm telescopic member (105), and the bucket telescopic member (107) are all configured as hydraulic telescopic cylinders.

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