RU2808206C1 - Pile hammer suitable for vertical installation of piles - Google Patents

Abstract

FIELD: pile hammers.

SUBSTANCE: invention relates to a pile hammer adapted for vertical installation of piles by controlling the vibration generated by a vibration generating unit in the vertical direction. A pile hammer adapted for vertical installation of piles includes a pile hammer body, a vibration housing supported relative to the pile hammer body by an elastic support block and containing a vibration generating unit configured to generate vibration for installing the pile; a side gripping part mounted on the side of the vibration housing and configured to grip the pile; a connecting bracket mounted on the body of the pile hammer; a vibration direction control unit mounted on the pile hammer housing and the vibration housing and configured to control the direction of vibration of the vibration housing in the vertical direction.

EFFECT: providing vertical installation of piles with a hammer that can apply a stable disturbing force in the direction of installation of the pile, and maintaining a vertical state according to the movement of the vibration load, ensuring stable operation even when the elastic support element is partially damaged, improving the gripping efficiency of the pile, since the installed pile can be grabbed from the side.

6 cl, 7 dwg

Description

Field of technology

The invention relates to a pile hammer, and more particularly to a pile hammer adapted for vertical installation of piles by controlling the vibration generated by a vibration generating unit in the vertical direction.

Prior Art

In general, to construct a building structure or civil engineering structure, foundation piles are buried down to the formation to provide load-bearing capacity. Foundation piles are made from a variety of materials, such as steel and concrete, and are installed using methods such as pile driving.

In particular, sheet piles used in the construction of roads, harbors, slope strengthening, river structures, etc., are pressed into the ground by vibration after securing the top head of the pile in the clamp of a pile hammer.

Japanese Patent Application Published No. 07-102562 describes a free-moving type vibratory pile hammer for installation, and Japanese Patent Application Published No. 2006-169942 describes a vibratory rotary pile hammer and a vibratory rotary pile driving method.

When the free-moving type vibrating pile hammer mentioned above sets the pile in an inclined position, the impact direction corresponding to the vibration direction of the vibrating body cannot be maintained to be parallel to the pile, so that the component force generated during the impact causes poor workability .

In addition, the vibration housing for installing the pile is not smoothly adjustable, so that the vibration of the vibration housing is not transmitted to the pile with a high degree of accuracy.

Korean Patent No. 10-1268417 describes a vibrating ripper for heavy construction machines. The described ripper for heavy construction machines includes a body having a support connected to the boom; a ripper supported on the housing and configured to vibrate with a vibrator to crush bedrock or excavated soil; and a vibration isolator assembly serving as a means for supporting the ripper, located between the body and the side of the ripper and configured to slide by a linear array of balls to reduce shock and vibration by moving the ripper up and down during vibration and operation of the ripper and supporting the part ripper body.

The prior art vibratory ripper described above can minimize reaction force and vibration that are transmitted to the vibratory ripper during bedrock crushing and soil extraction. However, the pile is difficult to install vertically.

Disclosure of the Invention

Technical problem

The invention is designed to solve the above problems, and the object of the invention is to provide a pile hammer adapted for vertical installation of piles, which can apply a sustained disturbing force in the direction of installation of the pile, since it is possible to vibrate the body of the pile hammer containing a vibrating device mounted therein. body, in the vertical direction parallel to the pile, to install the pile and maintain the vertical state according to the movement of the vibration load.

Another object of the invention is to provide a pile hammer adapted for vertical installation of piles, which can provide stable operation even when the elastic support member is partially damaged, since the pile hammer has a structure in which the vibrating body is supported by the first and second guide members installed vertically in the body of the pile hammer, and follower elements configured to move along the guide elements, and which can improve the efficiency of gripping the pile, since the installed pile can be grabbed from the side.

Technical solution

To solve this problem, a pile hammer adapted for vertical installation of piles, according to the invention, contains: a pile hammer body; a vibration housing supported relative to the pile hammer body by an elastic support block and comprising a vibration generating unit configured to generate vibration for installing the pile; a side gripping part mounted on the side of the vibration housing and configured to grip the pile; a connecting bracket mounted on the body of the pile hammer; and a vibration direction control unit installed on the pile hammer body and the vibration body and configured to control the vibration direction of the vibration body in the vertical direction.

The invention may also include a rotation block having a support element rotatably mounted by means of a coupling bracket and a pivot pin and adapted to rotate the body of the pile hammer in a forward and reverse direction relative to the support element.

There may also be a tilt block mounted on the support member and the connecting bracket and configured to tilt the support member mounted on the body of the pile hammer at a predetermined angle relative to the connecting bracket.

The vibration direction control unit may comprise guide elements installed vertically on both sides of the vibration housing, respectively, and follower elements installed on the body of the pile hammer and configured to ensure vibration of the vibration housing in the vertical direction by following the guide elements.

To solve the above problems, a pile hammer adapted for vertical installation of piles, according to the invention, contains: a pile hammer body; a vibration housing supported relative to the pile hammer body by an elastic support block and comprising a vibration generating unit configured to generate vibration for installing the pile; a side gripping part mounted on the side of the vibration housing and configured to grip the pile; a connecting bracket mounted on the body of the pile hammer so that the connecting bracket can be connected to the boom of the excavator and rotate the body of the pile hammer using the bucket cylinder; a bucket cylinder actuation shut-off unit configured to shut off the bucket cylinder actuation to set the degree of freedom of rotation of the pile hammer body relative to the boom during installation of the pile by means of the pile hammer; and a vibration direction control unit installed on the pile hammer body and the vibration body and configured to control the vibration direction of the vibration body in the vertical direction.

In the invention, the bucket cylinder actuation cut-off unit may also include a control valve coupled to each of the openings provided in the bucket cylinder body for extending and retracting the bucket cylinder rod and configured to supply and release operating fluid relative to the bucket cylinder body when extended. and retracting the bucket cylinder rod by means of an external force transmitted from the pile hammer body to the bucket cylinder rod through the connecting bracket.

Advantageous Effects

Since the pile hammer adapted for vertical installation of piles according to the invention can control the vertical direction of vibration of the vibration housing included in the vibration generation unit, it is possible to accurately install the pile in the vertical direction. In addition, since the generation of a disturbing force component for installing the pile can be reduced, the vibration impact force applied to the pile can be increased.

In addition, during installation of the pile, it is possible to prevent deviation of the installation direction of the pile by an external force applied by the boom and the cylinder of the excavator bucket connected to the connecting bracket.

In addition, since the side gripping portion for gripping the pile is formed on the side of the vibrating body, it is possible to easily grip the pile to be installed without the need to use larger equipment when the length of the pile to be installed is increased.

Brief description of drawings

In fig. 1 shows a state in which a pile hammer adapted for vertical installation of piles according to the invention is mounted on an excavator;

in fig. 2 – pile hammer, adapted for vertical installation of piles, according to the invention, perspective view;

in fig. 3 – pile hammer, adapted for vertical installation of piles, according to the invention, sectional view;

in fig. 4 – a pile hammer adapted for vertical installation of piles, according to another embodiment of the invention, disassembled perspective view;

in fig. 5 – state in which the lateral gripping part is installed on the vibrating body of the pile hammer, adapted for vertical installation of piles, according to the invention, sectional view;

in fig. 6 is a hydraulic diagram showing a cylinder actuation cut-off unit according to the invention;

in fig. 7 – state of actuation of a pile hammer adapted for vertical installation of piles according to the invention, perspective view.

Embodiments of the Invention

In fig. 1 and 2 show an embodiment of a pile hammer adapted for vertical installation of piles, according to the invention.

As shown in the drawings, a pile hammer 10 adapted for vertical installation of piles according to the invention includes a pile hammer body 12 containing a connecting bracket 11 which is connected to an arm 110 on which the bucket cylinder 111 of the excavator 100 is mounted, a vibrating body 41 which is supported relative to the pile hammer body 12 so that it can be vibrated by the elastic support members 35, and includes a vibration generating unit 40 and a side gripping portion 50 extending laterally from the vibrating body 41 for gripping the pile. The pile hammer body 12 and the vibration body 41 are installed with the vibration direction control unit 60 to control the vibration direction of the vibration body 41 in the vertical direction.

The pile hammer also includes a bucket cylinder actuation cut-off unit 80 that disables the bucket cylinder drive to set the degree of freedom of rotation of the pile hammer body relative to the boom during installation of a pile by the pile hammer.

As shown in FIG. 4, the connecting bracket 11 is rotatably supported by the support member 15 and the hinge pin 11a. A rotation block 20 that rotatably supports the pile hammer body 12 relative to the support member 15 may also be positioned between the support member 15 and the pile hammer body 12, and the support member 15 and the connecting bracket 11 may also be provided with a tilt block 70 for tilting the body. 12 of the pile hammer relative to the connecting bracket 11.

A pile hammer adapted for vertical installation of piles according to the invention, constructed as described above, is described in more detail below with reference to FIGS. 1 – 6 for each component.

The boom 110 and the bucket cylinder 111 of the excavator 100 are connected to the connecting bracket 11 by a hinge pin 11a so that a pile hammer adapted for vertical installation of piles can be controlled by the bucket cylinder 111 mounted on the boom 110 of the excavator 100. However, the invention is not limited to this. For example, the connecting bracket 11 may be connected to a quick connector that is connected to the boom 110 and the excavator bucket cylinder 111 by a connecting rod.

As shown in FIG. 2 and 3, the vibration direction control unit 60 for determining the vertical direction of the vibration body 41 includes first and second guide rods 61 and 62 mounted on the pile hammer body 12 in the vertical direction at the sides corresponding to both sides of the vibration body 41, respectively. Each of the first and second guide rods 61 and 62 may be formed by a plurality of rods that may be installed alternately.

In the body 12 of the pile hammer, first and second follower elements 65 and 66 are installed, which follow along the first and second guide rods 61 and 62, vertically mounted on both sides of the vibrating housing 41. The first and second follower elements 65 and 66 can be made in the form of guides rollers that contact each of the first and second guide rods 61 and 62 and are installed in the body 12 of the pile hammer. Preferably, at least two pairs of guide rollers are provided for each of the first and second guide rods 61 and 62.

The first and second follower members 65 and 66 are not limited to the above-described embodiment, but may be configured as sliding members connected to the first and second guide rods 61 and 62 and slidably configured.

The elastic support member 35 supports the vibrating body 41 to vibrate relative to the pile hammer body 12, and both end portions thereof are attached to the inner surface of the pile hammer body 12 and the corresponding side surface of the vibrating body 41. The elastic support member 35 may be made of rubber material and metal plates, alternately stacked. A fastening plate element for fastening may be installed on both sides of the elastic support member 35. The fastening plate element is attached to the inner surface of the pile hammer body 12 and the corresponding outer surface of the vibrating body 41, so that the vibrating body 41 is suspended from the pile hammer body 12 by means of an elastic support member 35.

The elastic support member is not limited to the above-described embodiment, but may be configured as an elastic spring for supporting the vibrating body 41 to vibrate relative to the pile hammer body 12.

In the vibration generating unit 40 installed in the vibration housing 41 to vibrate the vibration housing, two drive shafts are installed in parallel within the vibration housing 41 to which the weights are attached, and the drive shafts are equipped with gears that mesh with each other. The unbalances mounted on the drive shafts are mounted in the same direction relative to the drive shafts to maximize vibration in the vertical direction. In addition, the vibration housing is mounted with a hydraulic motor, which is an actuator for driving at least one of the two drive shafts.

This design is described in Korean Patent No. 0878296, claimed and registered by the inventor. However, the vibration generating unit is not limited to the above-described embodiment and may be of any structure as long as it can cause the vibration body to vibrate in the vertical direction.

A rotation unit 20 of the pile hammer 10 having a vibration direction control unit 60 is attached to the support member 15 and the body 12 of the pile hammer, as shown in FIG. 4, wherein the rotary shaft 21 attached to the body 12 of the pile hammer is rotatably mounted on the support member 15, and a ring gear 22 is mounted on the rotary shaft 21 coaxially with the rotary shaft 21. The ring gear 22 is supported on the rotary shaft 21 and attached to the body 12 of the pile hammer.

To rotate the ring gear 22 in the forward and reverse directions, a drive motor 24 is installed on the body 12 of the pile hammer. A drive gear (not shown) is installed on the drive shaft of the drive motor 24, which meshes with the ring gear 22. Motor 24 for rotating the drive The gear wheel can be designed as a hydraulic motor.

The tilt block 70 includes a tilt cylinder 71 rotatably mounted on the connecting bracket 11, and a rod 72 of the tilt cylinder 71 is connected to a mounting bracket 73 mounted at right angles to the pivot pin 11a? using the hinge pin 73a.

However, as shown in FIG. 4 and 5, a side gripping portion 50 for gripping and installing the pile 200 is positioned to project through an opening on the front side of the pile hammer housing 12 and includes at least a pair of side gripping members 51 and 52 rotatably mounted on vibrating body 41. On the side of the front end portions of the respective lateral gripping members 51 and 52, first and second pads 53 and 54 are installed to increase the gripping force when gripping the pile.

On the side of the rear end portions of the side gripping members 51 and 52, an actuator 55 is installed for rotating the side gripping members 51 and 52. The actuator may be configured as a hydraulic cylinder.

In the cylinder actuation cut-off unit 80, both sides of the body 112 of the bucket cylinder 111 are mounted on the boom 110 of the excavator 100, i.e. The bucket cylinder 111 mounted on the boom 110 on the end portion side of the excavator has openings 113 and 114 for supplying working fluid, and openings 113 and 114 are connected to the first and second connecting pipes 81 and 82. The first and second connecting pipes 81 and 82 are connected with a control valve to control the bucket cylinder 111 using the excavator hydraulic power unit. The first and second connecting pipes 81 and 82 are connected to the first and second branch pipes 91 and 92, respectively. There is a solenoid valve 93 configured to block the first and second outlet pipes 91 and 92 or return the working fluid to the tank through the first and second connection pipes 81 and 82 and the first and second outlet pipes 91 and 92 so that the bucket cylinder rod 111 can move freely. A 3-port, 2-position control valve is preferably used as the solenoid valve.

The following is a description of the operation of a pile hammer adapted for vertical installation of piles, according to the invention.

To install the pile, the connecting bracket 11 is supported on the boom 110 of the excavator 100. In this state, the pile 200 to be gripped is gripped by the side gripping portion 50 mounted in the vibrating body 41.

To this end, as shown in FIG. 4, 5 and 7, the vibration body 41 is adjusted by the rotation unit 20 and the tilt unit 70 so that the pile 200 can be easily gripped by the side gripping portion 50 in the state in which the pile 200 is located. In other words, the pile hammer body 12 is rotated to a predetermined angle by driving the drive gear 23 by a drive motor 24 mounted on the pile hammer body 12 or support member 15 to rotate the ring gear 22 meshing with the drive gear.

Moreover, the pile hammer body 12 is tilted by driving the tilt cylinder 71 of the tilt block 70 to rotate the support member 15 attached by the connecting bracket 11 and the hinge pin 11a to a predetermined angle, and the pile 200 is gripped by the side gripping portion 50 in the state in which the pile 200 is located.

This can improve the applicability of the piling apparatus by eliminating the need to move and secure the vibrating pile using equipment such as a separate crane, as is the case with a conventional vibrating piling hammer for piling.

In particular, when gripping the pile 200 as shown in FIG. 6, the side gripping portion 50 can grip the pile 200 to be installed from the sides with the first and second side gripping members 51 and 52 supported by the vibrating body 41 and projecting forward, and the excavator boom 110 does not need to be relatively long to be installed relatively long. piles 200. This can improve the manufacturability and applicability of the pile.

After completing the gripping of the pile 200 as described above, the pile 200 is moved to the installation position, and then the installation angle of the pile 200 is adjusted by the rotation block 20 and the tilt block 70 as described above.

In this state, the pile is installed by vibrating the vibrating body 41 using the vibration generating unit 40. When installing the pile 200, the vibration housing 41 of the vibration generating unit 40 vibrates relative to the pile hammer housing 12 using the elastic support members 35. At this moment, the vibration housing 41 vibrates in the vertical direction, i.e. in the vertical direction of the pile 200 to be installed, which is guided by the vibration direction control unit 60. The guide rollers, which are followers 65 and 66 mounted on both sides of the vibrating body 41, move along the first and second guide bars 61 and 62 so that the degree of freedom of vibration is limited and therefore a disturbing force can be applied to the pile in the vertical direction. This can prevent a vibration force component from being generated on the pile 200 through the vibration housing 41 and the side gripping portion 50 when installing the pile 200, and can increase the impact force since the load from the side gripping portion 50 and the vibration housing 41 is applied in the vertical direction.

In the pile hammer 10 having a precise vertical installation system according to the invention, since the vibrating body 41 is suspended from the pile hammer body 12 by the elastic support members 35, the vibration body 41 can be prevented from being separated from the pile hammer body 12 even when the elastic support members are damaged.

However, since the pile hammer adapted for vertical installation of piles installs the pile 200 in a state where the connecting bracket 11 is connected to the boom 110 of the excavator 100 and the bucket cylinder 111 mounted thereon, when the pile 200 is inserted, the excavator boom 110 is also lowered and therefore , the pile perceives external force in the outer direction. Therefore, the operator must precisely manipulate the cylinder to maintain a horizontal state, but there is a practical limitation regarding the manipulation.

However, while the pile 200 is installed under normal conditions, the bucket cylinder 111 mounted on the boom 110 controls the solenoid valve 93 via the cylinder actuation cut-off unit 80 to return the operating fluid to drive the bucket cylinder 111 into the tank. through the first and second outlet pipes 91 and 92. Thus, the rod of the bucket cylinder 111 is free to move forward and retract relative to the cylinder body 112 so that no external force is applied laterally relative to the installation direction of the pile 200 by the rod of the bucket cylinder 111.

Therefore, manufacturability and serviceability can be improved without manipulating the bucket cylinder 111 mounted on the boom 110 of the excavator 100 while installing the pile 200.

As described above, in a pile hammer adapted for vertical installation of piles according to the invention, a disturbing force acts in the vertical direction of the pile by adjusting the direction of vibration, so that the vibrating body can be vibrated in the vertical direction. Therefore, the efficiency of pile installation can be maximized.

In addition, when installing a pile using a pile hammer adapted for vertical installation of piles and mounted on the boom where the excavator bucket cylinder is mounted, the bucket cylinder mounted on the excavator boom and connected to the connecting bracket prevents the external force from being applied to the pile in the lateral direction, thereby preventing bending of the installed pile.

Although the invention has been described with reference to the embodiment shown in the drawings, this embodiment is given by way of example only and one skilled in the art will appreciate that various modifications and equivalent embodiments can be made with respect to the embodiment. execution.

Thus, the true scope of technical protection of an invention must be determined by the technical essence of the claims.

Industrial applicability

A pile hammer adapted for vertical installation of piles, according to the invention, can be used with a press, grinder, hammer drill, etc. for driving or crushing rock.

Claims (19)

1. A pile hammer adapted for vertical installation of piles, containing: pile hammer body; a vibration housing supported relative to the pile hammer body by an elastic support block and comprising a vibration generating unit configured to generate vibration for installing the pile; a side gripping part mounted on the side of the vibration housing and configured to grip the pile; a connecting bracket mounted on the body of the pile hammer; And a vibration direction control unit mounted on the pile hammer housing and the vibration housing and configured to control the direction of vibration of the vibration housing in the vertical direction. 2. The pile hammer according to claim 1, in which the vibration direction control unit contains guide elements installed vertically on both sides of the vibration housing, respectively, and tracking elements installed on the pile hammer body and configured to ensure vibration of the vibration housing in the vertical direction by means of following the guide elements. 3. Pile hammer according to claim 1, also containing: a rotation unit having a support member rotatably mounted by a coupling bracket and a pivot pin and adapted to rotate forward and reverse the body of the pile hammer relative to the support member, and an inclination block mounted on the support member and the connecting bracket and configured to tilt the support member mounted on the body of the pile hammer at a predetermined angle relative to the connecting bracket. 4. Piling hammer, adapted for vertical installation of piles, containing: pile hammer body; a vibration housing supported relative to the pile hammer body by an elastic support block and comprising a vibration generating unit configured to generate vibration for installing the pile; a side gripping part mounted on the side of the vibration housing and configured to grip the pile; a connecting bracket mounted on the body of the pile hammer so that the connecting bracket is capable of connecting to the boom of the excavator and rotating the body of the pile hammer using the bucket cylinder; a block for disabling the actuation of the bucket cylinder, configured to disable the actuation of the bucket cylinder to set the degree of freedom of rotation of the body of the pile hammer relative to the boom during installation of the pile; And a vibration direction control unit mounted on the pile hammer housing and the vibration housing and configured to control the direction of vibration of the vibration housing in the vertical direction. 5. The pile hammer according to claim 4, in which the vibration direction control unit contains first and second guide elements mounted vertically on both sides of the vibration housing, respectively, and guide rollers installed on the pile hammer body and configured to ensure vibration of the vibration housing in vertical direction by following the guide elements. 6. The pile hammer according to claim 4, in which the block for shutting off the actuation of the bucket cylinder also contains a control valve connected to each of the holes that are available in the body of the bucket cylinder for extending and retracting the rod of the bucket cylinder and is configured to supply and release the working fluid medium relative to the bucket cylinder body when extending and retracting the bucket cylinder rod by means of an external force transmitted from the pile hammer body to the bucket cylinder rod through the connecting bracket.

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