Damping device and pile hammer

Abstract

The invention discloses a damping device and a pile hammer, and belongs to the technical field of vibration pile sinking and pulling equipment. The vibration reduction device comprises a vibration reduction support, a screw rod is arranged at the top end of the vibration reduction support, a spring vibration reduction assembly is arranged on the screw rod, and the spring vibration reduction assembly is hinged to a device where a vibration source is located through a crank. A plurality of sets of rubber damping blocks are arranged on the side edge of the damping support, and the two end faces of the rubber damping blocks are connected with the damping support and a device where a vibration source is located respectively. Through the design method of load grading vibration reduction, the vibration reduction work of a low-load rubber block and the combined vibration reduction form of a high-load spring and rubber, the bearing capacity of the vibration reduction device is greatly improved by increasing the vibration reduction of the spring; and the active overturning function of the pile hammer is met, and the vibration reduction requirement of the pile hammer for work of different static pressure loads and pulling loads under different geological conditions is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of vibration pile sinking and extraction equipment, and more specifically, relates to a vibration reduction device and a pile hammer. Background Art

[0002] The pile hammer uses a hydraulic motor to drive the eccentric wheel to rotate at high speed to generate high-frequency vibration, and transmits energy to the pile body through the clamp, so that the surrounding soil structure changes, reducing the friction resistance between the pile body and the soil, and assisting the pile driver's arm force to sink or pull the pile body into or out of the ground to complete the construction work. It has the advantages of high construction efficiency and low noise. It is widely used in municipal engineering, bridge cofferdams, building foundations, high-speed railway foundations, highway foundations, and deep pit support pile driving and extraction operations. In the field of vibration pile sinking and extraction equipment technology, the vibration reduction device of the pile hammer plays a vital role. It can not only improve the comfort of the operating environment, but also effectively avoid the vibration of the pile frame and reduce the risk of damage to the structural parts caused by vibration.

[0003] The existing vibration reduction device for pile hammers used in pile drivers is mainly composed of a vibration reduction frame and multiple rubber vibration reduction blocks with the same shear stiffness and bearing capacity. The stiffness and bearing capacity of the vibration reduction system are fixed. The number of vibration reduction blocks of the pile hammer is often determined by the maximum pile pulling force carried by the pile driver in the lifting and pulling state. In the actual construction process, due to different geological conditions, the vibration reduction stiffness and bearing capacity required by the pile hammer in the actual working process are different. Under soft geological conditions, only vibration is required to overcome the resistance of the pile end and the pile side. The pile driving arm may not participate in the downward pressure or a small load downward pressure. When pulling out, the lifting force required by the pile driving arm is also small. At this time, the vibration isolation system does not need a large bearing capacity. It is hoped that the vibration reduction system has a small stiffness and a large vibration isolation coefficient. Under hard geological conditions, vibration + pile driving arm carrying load downward pressure is required to overcome the resistance of the pile end and the pile side. When pulling out, the lifting force required by the pile driving arm is large. At this time, it is hoped that the vibration isolation system has a large bearing capacity to avoid damage to the vibration reduction device due to excessive force. Existing pile hammer vibration reduction devices usually have a fixed number of rubber vibration reduction blocks. The number of vibration reduction blocks is based on meeting the vibration reduction requirements, and more consideration is given to the load requirements of the pile hammer for static pressure and pile pulling operations under the worst conditions. More rubber vibration reduction blocks are set to meet the bearing strength and stability requirements of the vibration reduction system under large loads. A large number of rubber vibration reduction blocks leads to a larger stiffness of the vibration reduction system, sacrificing the vibration reduction effect of the pile hammer under small loads; due to factors such as installation space limitations and the heat generation of rubber under high-frequency vibration conditions, it will also cause the excitation box that needs to dissipate heat to be difficult to dissipate.

[0004] Patent CN 204590019U discloses a secondary vibration reduction mechanism of a vibratory hammer, including a shell and a vibration reduction mechanism, the vibration reduction mechanism including a mounting seat and a plurality of first vibration reduction rubbers, the top of the mounting seat extends into the vibration reduction shell, the first vibration reduction rubber is installed between the portion of the mounting seat extending into the shell and the inner wall of the shell, and the mounting seat is also provided with a secondary vibration reduction component that increases the pile pulling force load of the vibration reduction mechanism after a certain deformation of the first vibration reduction rubber. By adopting the above scheme, a vibration reduction structure of a vibratory hammer is provided that can quickly pull piles by automatically adjusting the pile pulling force load of the vibration reduction component.

[0005] The above-mentioned prior art has the following main disadvantages: it can only perform secondary vibration reduction in the lifting state, which cannot meet the secondary vibration reduction requirements of the pile driving hammer during static pressure operation; the pile driving hammer using the vibration reduction device does not have a flipping function and cannot perform flipping pile picking operations; the top of the mounting seat extends into the vibration reduction shell, and the connection structure through the limit rod is complex, maintenance is inconvenient, and the cost is high. Summary of the invention

[0006] The purpose of the present invention is to address the above shortcomings and provide a vibration reduction device and a pile hammer. Through the design method of load-graded vibration reduction, low-load rubber block vibration reduction, and high-load spring + rubber combination vibration reduction, the bearing capacity of the vibration reduction device is greatly increased by adding spring vibration reduction; the function of active flipping of the pile hammer is met, and the vibration reduction requirements of the pile hammer working under different static pressure loads and pulling loads under different geological conditions are met.

[0007] To achieve the above object, the present invention is implemented by the following technical solutions: In a first aspect, the present invention provides a vibration reduction device, comprising a vibration reduction bracket, A screw rod is provided at the top of the vibration-damping bracket, and a spring vibration-damping assembly is provided on the screw rod. The spring vibration-damping assembly is hinged to the device where the vibration source is located through a crank; A plurality of groups of rubber vibration-damping blocks are arranged on the side of the vibration-damping bracket, and two end surfaces of the plurality of groups of rubber vibration-damping blocks are respectively connected to the vibration-damping bracket and the device where the vibration source is located.

[0008] Furthermore, the spring damping assembly includes a first spring, an intermediate spring and a second spring which are sleeved on a screw rod, and a first clamping gasket, a first slider and a second clamping gasket are sequentially arranged between the first spring and the intermediate spring; a third clamping gasket, a second slider and a fourth clamping gasket are sequentially arranged between the intermediate spring and the second spring; the spring is clamped by the first slider and the second slider slidingly touching two adjacent gaskets.

[0009] Furthermore, the first and second clamping washers are provided with a first adjusting nut and a second adjusting nut on the side close to the first slider, respectively; the third and fourth clamping washers are provided with a third adjusting nut and a fourth adjusting nut on the side close to the second slider, respectively; the inner diameters of the two sliders are larger than the outer dimensions of the adjusting nuts; the pre-tightening of the springs is adjusted by the threaded fit of the adjusting nuts and the screw rod. That is, the initial stiffness and the frequency of the spring damping are changed by rotating the adjusting nuts left and right to adapt to different pulling-out conditions.

[0010] Furthermore, two guide rails are respectively provided in the first slider and the second slider, and the guide rails are provided with internal threads that cooperate with the screw rod, and one end surface of the guide rail is in contact with the adjacent adjustment nut; the guide rail is combined with each adjustment nut to pre-tighten each spring.

[0011] Furthermore, the cranks are provided with two groups, one end of the two groups of cranks are respectively hinged to the first slider and the second slider through pin one, the other ends of the two groups of cranks are each hinged to a group of cross shafts through pin two, and the cross shafts are hinged to the device where the vibration source is located through pin three.

[0012] Furthermore, both ends of the screw rod are connected to the vibration-damping bracket via locking nuts.

[0013] In a second aspect, the present invention further provides a pile driver, comprising the vibration reduction device described in the first aspect and an excitation box where the vibration source is located, wherein the top of the excitation box is hinged to the spring vibration reduction assembly of the vibration reduction device via a mounting seat, and the side of the vibration reduction box is connected to the vibration reduction bracket via a rubber vibration reduction block.

[0014] Furthermore, the mounting seat of the excitation box is hinged to the cross axis of the vibration reduction bracket, one end face of the rubber vibration reduction block is connected to the vibration reduction bracket through a fixed connector, and the other end face is connected to the excitation box through a fixed connector.

[0015] Furthermore, the pile hammer also includes a secondary arm, a slewing device, a U-shaped frame and a clamping mouth; the secondary arm is hinged to the slewing device, and the slewing device is connected to and drives the U-shaped frame to rotate; the U-shaped frame is hinged to the vibration reduction device through a pin shaft four, and the lower end of the excitation box is connected to the clamping mouth, and the vibration reduction device rotates around the pin shaft four together with the excitation box and the clamping mouth, which can assist the clamping mouth to accurately pick up the pile.

[0016] Furthermore, the rotation angles of the vibration reduction device, the vibration excitation box and the clamping nozzle are 0-90°.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The vibration reduction device provided by the present invention adopts a design method of load-graded vibration reduction, a low-load rubber block for vibration reduction, and a high-load spring + rubber combination for vibration reduction. By adding spring vibration reduction, the bearing capacity of the vibration reduction device is greatly increased, and a large deformation load of the rubber vibration reduction block under a large load is avoided, which is beneficial to improving the life of the rubber vibration reduction block. The combination of the rubber vibration reduction block and the spring vibration reduction not only fully utilizes the advantages of the rubber vibration reduction having good elasticity and damping characteristics and being able to effectively absorb high-frequency vibrations, but also makes up for the disadvantage of the weak bearing capacity of the rubber vibration reduction by the high bearing capacity and stability of the spring vibration reduction device. The pile hammer of the present invention adopts the vibration reduction device of the present invention, and adjusts the vibration reduction stiffness and bearing capacity of the vibration reduction system according to the changes of static pressure and lifting load, so as to better exert the vibration reduction performance of the vibration reduction device under different working conditions, improve the vibration reduction effect of the vibration reduction system under low load, and meet the vibration reduction requirements of the pile hammer working under different static pressure loads and lifting loads under different geological conditions; The rubber vibration damping block + spring vibration damping vibration damping mode of the present invention avoids using too many rubber vibration damping blocks, which not only increases the heat dissipation space of the exciting box, but also reduces the heat source of high-frequency vibration heat generation of the vibration damping block, which is beneficial to reducing the working temperature of the exciting box; The pile driving hammer of the present invention is designed with a load-grading vibration reduction device with a flipping function suitable for static pressure and pulling operations, which not only satisfies the function of active flipping of the pile driving hammer, but also realizes the adjustment of the vibration reduction stiffness and bearing capacity of the vibration reduction system when the static pressure and pulling load of the pile driving hammer change, and better exerts the vibration reduction performance of the vibration reduction device according to different working conditions, thereby improving the vibration reduction effect of the vibration reduction system under low load. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a vibration reduction device provided in Example 1 of the present invention; Figure 2 This is a schematic diagram of the side structure of the vibration reduction device according to Example 1 of the present invention; Figure 3 It is an exploded view of the parts of the spring vibration reduction assembly in the vibration reduction device described in Example 1; Figure 4 This is an assembly and disassembly diagram of the vibration reduction device and the vibration excitation box described in Example 1; Figure 5 A schematic diagram of the structure of a pile hammer provided in Example 2; Figure 6 A schematic diagram of the structure of the vibration reduction device in the pile hammer according to Example 2 being turned over; Figure 7 It is a schematic diagram of the rubber damping block and the spring damping state of the pile hammer in static pressure state described in Example 3; Figure 8It is a schematic diagram of the rubber vibration-damping block and the spring vibration-damping state of the pile hammer in the lifting and pulling state described in Example 3.

[0019] In the figure: 1. auxiliary arm; 2. steering mechanism; 3. U-shaped frame; 4. vibration reduction device; 41. vibration reduction bracket; 42. pin shaft one; 43. second spring; 44. second slider; 45. intermediate spring; 46. first slider; 47. first spring; 48. crank; 49. pin shaft two; 410. cross shaft; 411. locking nut; 412. screw; 413. pin shaft three; 414. adjustable guide rail; 415. rubber vibration reduction block; 416. round nut; 417. first adjusting nut; 418. first clamping gasket; 419. second adjusting nut; 420. second clamping gasket; 421. third adjusting nut; 422. third clamping gasket; 423. fourth adjusting nut; 424. fourth clamping gasket; 5. excitation box; 51. mounting seat; 6. nozzle; 7. pin shaft four. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention will be described in more detail below in conjunction with the accompanying drawings and specific examples.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] Example 1 This embodiment provides a vibration reduction device suitable for a vibration pile hammer, such as Figure 1 As shown, it includes a vibration-damping bracket 41, a screw rod 412 is provided at the top end of the vibration-damping bracket 41, a spring vibration-damping assembly is provided on the screw rod 412, and the spring vibration-damping assembly is hinged to the vibration box 5 through a crank 48; a plurality of groups of rubber vibration-damping blocks 415 are provided on the side of the vibration-damping bracket 41, and two end faces of the plurality of groups of rubber vibration-damping blocks 415 are respectively connected to the vibration-damping bracket 41 and the vibration box 5.

[0024] like Figure 2 As shown, both ends of the screw rod 412 are connected to the vibration-damping bracket 41 through locking nuts 411 .

[0025] In this embodiment, the spring damping assembly includes a spring sleeved on the screw rod 412, a compression washer, an adjusting nut, a slider, and the like.

[0026] Specifically, Figure 1 and Figure 3 As shown, the first spring 47, the first clamping gasket 418 and the first adjusting nut 417 are installed in sequence on the left side of the screw rod 412. The first adjusting nut 417 compresses the first clamping gasket 418 by cooperating with the thread of the screw rod 412. The preload force of the first spring 47 can be adjusted by rotating the first adjusting nut 417 left and right to change the initial stiffness and vibration reduction frequency of the spring vibration reduction to suit different pulling-out conditions. The second spring 43, the fourth clamping gasket 424 and the fourth adjusting nut 423 are installed on the right side of the screw rod 412. The fourth adjusting nut 423 cooperates with the thread of the screw rod 412 to compress the first clamping gasket 418. The preload force of the first spring 47 can be adjusted by rotating the first adjusting nut 417 left and right to change the initial stiffness and vibration reduction frequency of the spring vibration reduction to suit different pulling-out conditions. The threaded cooperation of the rod 412 compresses the fourth clamping gasket 424, and the preload force adjustment method of the second spring 43 is the same as that of the first spring 47 on the left side; an intermediate spring 45 is provided in the middle of the screw rod 412, and the second clamping gasket 420 and the third clamping gasket 422 are installed on the left and right sides of the intermediate spring 45 respectively, and the second adjusting nut 419 is installed on the left side of the second clamping gasket 420, and the third adjusting nut 421 is installed on the right side of the third clamping gasket 422. The two adjusting nuts can be tightened inward to preload the intermediate spring 45 and adjust the initial stiffness and vibration reduction frequency of the spring vibration reduction.

[0027] Two guide rails 414 with internal threads are respectively arranged between the first adjusting nut 417 and the second adjusting nut 419, and between the third adjusting nut 421 and the fourth adjusting nut 423. The internal threads cooperate with the screw 412, and each of the four guide rails 414 has an end face that fits with the end face of the adjacent adjusting nut. The left guide rail 414 is provided with a first slider 46, and the right guide rail 414 is provided with a second slider 44. The inner diameters of the first slider 46 and the second slider 44 are larger than the outer dimensions of each adjusting nut. The first slider 46 and the second slider 44 slide freely along the guide rail 414 between the first clamping gasket 418 and the second clamping gasket 420, and between the third clamping gasket 422 and the fourth clamping gasket 424. The left and right sliding can touch the two adjacent gaskets to clamp the spring. The four guide rails 414 and the adjusting nuts cooperate to adjust the spring preload, taking into account the functions of guiding the slider and preventing the adjusting nut from loosening.

[0028] like Figure 1 and Figure 4 As shown, the first slider 46 and the second slider 44 are provided with hinge holes at the lower ends, which are hinged to the pin holes at the upper ends of the crank 48 through the pin 1 42, the pin holes at the lower ends of the crank 48 are hinged to the upper ends of the cross shaft 410 through the pin 2 49, and the lower ends of the cross shaft 410 are hinged to the mounting seat 51 of the excitation box 5 through the pin 3 413. Three rubber vibration-damping blocks 415 are symmetrically arranged in the grooves on both sides of the vibration-damping bracket 41, front and back, left and right, for a total of 12. The number of vibration-damping blocks can be adjusted according to the load value calibrated to define the soft and hard geological conditions. The two end surfaces of the rubber vibration-damping blocks 415 are respectively bolted to the vibration-damping bracket 41 and the excitation box 5.

[0029] When the excitation box 5 continues to approach the vibration damping bracket 41, the cross shafts 410 on both sides push the crank 48, respectively driving the first slider 46 and the second slider 44 to move toward the middle until they contact the second clamping gasket 420 and the third clamping gasket 422 in the middle; if the movement continues, the middle spring 45 is simultaneously compressed by the second clamping gasket 420 and the third clamping gasket 422; when the excitation box 5 continues to move away from the vibration damping bracket 41, the cross shafts 410 on both sides push the crank 48, respectively driving the first slider 46 and the second slider 44 to move toward both sides until they contact the first clamping gasket 418 and the fourth clamping gasket 4-24 at the same time; if the movement continues, the first spring 47 and the second spring 43 are simultaneously compressed by the first clamping gasket 418 and the fourth clamping gasket 4-24.

[0030] Example 2 This embodiment provides a pile hammer, including the vibration reduction device 4 described in embodiment 1, specifically, as Figure 5 As shown, it also includes a jib 1, a rotating device 2, a U-shaped frame 3, an exciting box 5 and a clamping nozzle 6.

[0031] In this embodiment, the auxiliary arm 1 is hinged with the slewing device 2 through a pin shaft, the slewing device 2 is connected with the U-shaped frame 3 and drives the U-shaped frame 3 to rotate, the U-shaped frame 3 is hinged with the vibration reduction device 4 through a pin shaft 47, the side of the vibration reduction device 4 is connected with the vibration reduction box 5 through a rubber vibration reduction block 415, and the top of the vibration reduction box 5 is hinged with the spring vibration reduction mechanism of the vibration reduction device 4 through a mounting seat 51. The pin shaft 47 is fixed on the outside of the vibration reduction bracket 41 by a round nut 416, as shown in FIG. Figure 2 As shown. A clamping nozzle 6 is provided at the lower end of the excitation box 5, and the two are connected by bolts. The vibration reduction device 4 rotates around the pin 4 7 together with the excitation box 5 and the clamping nozzle 6, and the rotation angle is 0-90°, which can assist the clamping nozzle to accurately pick up the pile. Figure 6 shown.

[0032] Example 3 This embodiment provides a specific implementation scheme of the pile driver described in Embodiment 2.

[0033] Figure 7 and Figure 8 It is a principle schematic diagram of the rubber vibration reduction state and the spring vibration reduction state when the pile hammer is in the static pressure state and the pulling state respectively. As shown in the figure, the end surface of the slider close to the springs on both sides at the initial position is defined as point P, and the end surface of the left and right springs pressing the gasket is defined as point A, then AP is the distance that the slider slides to both sides of the vibration reduction device at the same time; the end surface of the slider close to the middle spring at the initial position is defined as point Q, and the end surface of the middle spring pressing the gasket is defined as point B, then QB is the distance that the slider slides to the middle of the vibration reduction device at the same time; when point P coincides with point A, the deformation variable of the rubber vibration reduction block is X; when point Q coincides with point B, the deformation variable of the rubber vibration reduction block is Y.

[0034] (1) In the preparation stage for piling: After the pile hammer picks up the pile, the vibration reduction device 4, the exciting box 5 and the clamping nozzle 6 rotate as a whole around the pin shaft 47 to a vertical state. As the auxiliary arm 1 is lifted, the vibration reduction bracket 41 of the vibration reduction device 4 moves in the vertical direction relative to the exciting box 5 under the action of the gravity of the pile body, the clamping nozzle 6 and the exciting box 5. Since one end face of the rubber vibration reduction block 415 in the vibration reduction device 4 is fixed to the vibration reduction bracket 41 and the other end face is fixed to the exciting box 5, the vibration reduction bracket 41 will move in the vertical direction relative to the exciting box 5. The relative displacement relative to the vibration box 5 causes deformation, overcoming the gravity load of the pile body, the clamping nozzle 6, and the vibration box 5. At the same time, the hinge point of the mounting seat 51 above the vibration box 5 gradually moves away from the vibration reduction bracket 41, driving the cross shaft 410 to pull down the crank 48, pushing the first slider 46 and the second slider 44 to the first clamping gasket 418 and the fourth clamping gasket 4-24 on both sides respectively. At this time, the slider is located between AP and does not contact the gasket; when the vibration box 5 starts to vibrate, only the rubber vibration reduction block 415 is used for vibration reduction, and the three springs are all in an uncompressed state.

[0035] After the pile sinking begins, since the end of the pile body contacts the ground, the rubber vibration damping block 415 begins to recover its initial state, and under the action of the gravity of the pile, it begins to deform in the opposite direction. At the same time, the hinge point of the mounting seat 51 above the exciting box 5 gradually approaches the vibration damping bracket 41, driving the cross shaft 410 to push up the crank 48, pushing the first slider 46 and the second slider 44 to approach the second clamping gasket 420 and the third clamping gasket 422 in the middle respectively. At this time, the slider is located between BQ and does not contact the gasket; when the exciting box 5 starts to vibrate, only the rubber vibration damping block 415 is used for vibration reduction, and the three springs are all in an uncompressed state.

[0036] (2) Small load pile sinking and extraction operations: If the construction geology is easy to construct (such as low-density sand) or the pile driving depth is shallow, the vibration generated in the excitation box 5 plus the weight of the pile hammer itself is sufficient to overcome the pile end resistance and the pile side resistance, so that the pile body moves downward, and the auxiliary arm 1 does not need to apply static pressure; or the vibration generated in the excitation box 5 plus the weight of the pile hammer itself is insufficient to overcome the pile end resistance and the pile side resistance, but a small static pressure is applied to move the pile body downward; in the above two working conditions, the static pressure load received by the vibration reduction device 4 is small, and the rubber vibration reduction block 415 can resist within the deformation X. At this time, the mounting seat 51 on the excitation box 5 is close to the vibration reduction bracket 41, driving the cross shaft 410 to push the crank 48 upward, pushing the first slider 46 and the second slider 44 to the second compression gasket 420 and the third compression gasket 422 in the middle respectively, and the first slider 46 and the second slider 44 slide between BQ and do not contact the gasket, and only the rubber vibration reduction block 415 performs vibration reduction.

[0037] Similarly, in the pulling-out state, due to the vibration of the exciting box 5, the soil is "liquefied", and the friction on the pile side is greatly reduced; the lifting of the auxiliary arm 1 drives the vibration reduction bracket 41 to rise, and a relative displacement occurs with the exciting box 5, and the rubber vibration reduction block 415 is deformed. At this time, the pulling-out load is mainly a gravity load, and the deformation of the rubber vibration reduction block 415 can be resisted within less than Y. At this time, the first slider 46 and the second slider 44 of the spring vibration reduction do not touch the first clamping gasket 418 and the fourth clamping gasket 4-24 on both sides, and the spring vibration reduction does not take effect.

[0038] (3) Heavy load pile sinking and extraction operations: If the construction geology is difficult to construct (such as high-density clay) or the construction depth is deep, the vibration generated in the excitation box 5 cannot overcome the pile end resistance and pile side resistance, causing the pile body to move downward, and the auxiliary arm 1 needs to apply static pressure; as the pile driving depth continues to increase, the static pressure continues to increase, the rubber vibration damping block 415 is subjected to the static pressure load, and the deformation gradually increases. At the same time, the mounting seat 51 on the excitation box 5 gradually approaches the vibration damping bracket 41, driving the cross shaft 410 to push the crank 48 upward, pushing the first slider 46 and the second slider 44 gradually approaching the second clamping gasket 420 and the third clamping gasket 422 in the middle.

[0039] As the static pressure increases to a certain value, the deformation of the rubber vibration damping block 415 exceeds X, and the first slider 46 and the second slider 44 continue to move toward the middle, and begin to push the second clamping gasket 420 and the third clamping gasket 422 in the middle to compress the middle spring 45. The rubber vibration damping and the spring vibration damping begin to act simultaneously to bear the load and dampen the vibration source in the excitation box 5.

[0040] Similarly, in the initial pulling-out state, due to the geological conditions or the large buried depth of the pile body, the initial pulling-out load is large, and the rubber vibration reduction and the spring vibration reduction begin to act simultaneously to bear the load; the first slider 46 and the second slider 44 respectively press the first clamping gasket 418 and the fourth clamping gasket 4-24 on both sides, forcing the first spring 47 on the left and the second spring 43 on the right to compress; as the buried depth of the pile body gradually decreases, the pulling-out load gradually decreases, and when it reaches a certain value, the first spring 47 and the second spring 43 return to their initial state, and after the deformation of the rubber vibration reduction block 415 is reduced to within Y, only the rubber vibration reduction block 415 begins to reduce the vibration of the vibration source in the excitation box 5.

[0041] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Without departing from the scope and technical principles of the described embodiments, many modifications and changes are obvious to those of ordinary skill in the art, and these modifications and changes should also be regarded as the scope of protection of the present invention.

Claims

1. A vibration reduction device, characterized in that: including a vibration-damping bracket (41), A screw rod (412) is provided at the top end of the vibration-damping bracket (41), a spring vibration-damping assembly is provided on the screw rod (412), and the spring vibration-damping assembly is hinged to a device where a vibration source is located via a crank (48); A plurality of groups of rubber vibration-damping blocks (415) are provided on the side of the vibration-damping bracket (41), and two end surfaces of the plurality of groups of rubber vibration-damping blocks (415) are respectively connected to the vibration-damping bracket (41) and the device where the vibration source is located.

2. The vibration reduction device according to claim 1, characterized in that: The spring damping assembly comprises a first spring (47), an intermediate spring (45) and a second spring (43) which are sleeved on a screw rod (412); a first compression gasket (418), a first slider (46) and a second compression gasket (420) are arranged in sequence between the first spring (47) and the intermediate spring (45); a third compression gasket (422), a second slider (44) and a fourth compression gasket (424) are arranged in sequence between the intermediate spring (45) and the second spring (43); the spring is compressed by sliding the first slider (46) and the second slider (44) against two adjacent gaskets.

3. The vibration reduction device according to claim 2, characterized in that: The first clamping gasket (418) and the second clamping gasket (420) are respectively provided with a first adjusting nut (417) and a second adjusting nut (419) on one side close to the first slider (46); the third clamping gasket (422) and the fourth clamping gasket (424) are respectively provided with a third adjusting nut (421) and a fourth adjusting nut (423) on one side close to the second slider (44); the inner diameters of the two sliders are larger than the outer dimensions of the adjusting nuts; and the pre-tightening of the springs is adjusted by the threaded fit of the adjusting nuts and the screw rod (412).

4. The vibration reduction device according to claim 2, characterized in that: Two guide rails (414) are respectively provided in the first sliding block (46) and the second sliding block (44). The guide rails (414) are provided with internal threads that cooperate with the screw rod (412). One end surface of the guide rail (414) is in contact with an adjacent adjustment nut.

5. The vibration reduction device according to claim 2, characterized in that: The cranks (8) are provided in two groups, one end of each of the two groups of cranks (8) is respectively hinged to the first slider (46) and the second slider (44) via a first pin (42), and the other end of each of the two groups of cranks (8) is hinged to a group of cross shafts (10) via a second pin (49), and the cross shafts (10) are hinged to the device where the vibration source is located via a third pin (413).

6. The vibration reduction device according to claim 1, characterized in that: Both ends of the screw rod (412) are connected to the vibration-damping bracket (41) via locking nuts (411).

7. A pile hammer, characterized in that: It comprises the vibration reduction device (4) as claimed in any one of claims 1 to 6 and an excitation box (5) where a vibration source is located, wherein the top end of the excitation box (5) is hingedly connected to the spring vibration reduction assembly of the vibration reduction device (4) via a mounting seat (51), and the side of the excitation box (5) is connected to the vibration reduction bracket (41) via a rubber vibration reduction block (415).

8. The pile hammer according to claim 7, characterized in that: The mounting seat (51) of the vibration box (5) is hinged to the cross shaft (10) of the vibration damping bracket (41); one end face of the rubber vibration damping block (415) is connected to the vibration damping bracket (41) via a fixed connecting piece, and the other end face is connected to the vibration box (5) via a fixed connecting piece.

9. The pile hammer according to claim 7, characterized in that: The pile hammer further comprises a secondary arm (1), a slewing device (2), a U-shaped frame (3) and a clamping mouth (6); the secondary arm (1) is hinged to the slewing device (2), the slewing device (2) is connected to and drives the U-shaped frame (3) to rotate; the U-shaped frame (3) is hinged to the vibration reduction device (4) via a pin shaft four (7), the lower end of the vibration box (5) is connected to the clamping mouth (6), and the vibration reduction device (4) rotates around the pin shaft four (7) together with the vibration box (5) and the clamping mouth (6).

10. The pile hammer according to claim 9, characterized in that: The rotation angles of the vibration reduction device (4), the vibration excitation box (5) and the clamping nozzle (6) are 0-90 degrees.

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