Impact hammer for pile driver

Abstract

The invention discloses an impact hammer for a pile driver. The impact hammer comprises a hammer body, a hammer tile and a fixing piece. The hammer body extends outwards in the radial direction to form a plurality of hammer limbs. A connecting surface is constructed on the periphery of the hammer limb, and the plurality of hammer tiles are detachably fixed on the connecting surface through the fixing pieces; the multiple hammer tiles on one connecting face form a hammer tile set, and the thickness of the hammer tile set is adjustable in the diameter direction of the hammer body. A hollow hammer cap is arranged at the top of the hammer body and is used for accommodating a balancing weight; the impact hammer further comprises a first limiting piece, and the first limiting piece is detachably connected with the hammer cap so as to limit the balancing weight to be separated from the hammer cap. The impact hammer has wide applicability to punching operation under various engineering general conditions through reducing and weight adjusting, so that the construction efficiency is improved, and the construction cost is saved.

Description

Technical Field

[0001] The invention relates to the field of pile driver equipment, in particular to an impact hammer used for a pile driver. Background Art

[0002] In the construction of pile foundation, when the pile foundation is constructed by the punching cast-in-place pile method, the punching method is to use a pile driver to raise the impact hammer with a drill blade, and rely on the impact force of free fall to cut the rock layer, and at the same time cooperate with mud circulation to discharge the debris. The existing impact hammers are usually fixed in diameter and weight, but the pile diameters are usually different in pile foundation design, and the geological conditions at the pile foundation location vary greatly and are complicated. In the punching construction, not only do you need to replace the impact hammers of different diameters according to different pile diameters, but you also need to use impact hammers of different weights according to different geological conditions.

[0003] This construction method has the following disadvantages: during the punching construction, the construction team needs to purchase and prepare several different types of impact hammers, which increases the cost of tooling equipment and is particularly uneconomical; when replacing the impact hammer, the impact hammer must be transported to different sites, and the disassembly, lifting, and transportation processes all take a lot of time, making the overall drilling efficiency of the pile foundation low.

[0004] Therefore, there is an urgent need to invent an impact hammer for a pile driver that can change diameter and weight and is widely applicable to punching operations in various engineering profiles, thereby improving construction efficiency and saving construction costs. Summary of the invention

[0005] The main technical problem to be solved by the present invention is to provide an impact hammer for a pile driver, which can be changed in diameter and adjusted in weight to be suitable for punching operations in various engineering profiles.

[0006] In order to solve the above technical problems, the present invention provides an impact hammer for a pile driver, comprising a hammer body, a hammer shoe and a fixing member;

[0007] The hammer body is provided with a plurality of hammer limbs extending radially outward; the outer periphery of the hammer limbs is provided with a connecting surface, and a plurality of hammer shoes are detachably fixed on the connecting surface through the fixing member;

[0008] A plurality of hammer shoes on the same connecting surface form a hammer shoe group, and the thickness of the hammer shoe group is adjustable along the diameter direction of the hammer body.

[0009] In a preferred embodiment, a hollow hammer cap is provided on the top of the hammer body to accommodate a counterweight;

[0010] The impact hammer also includes a first limiting member; the first limiting member is detachably connected to the hammer cap to limit the counterweight block from being separated from the hammer cap.

[0011] In a preferred embodiment, the fixing member includes a connecting rod, a second limiting member and a third limiting member;

[0012] The connecting rod is inserted into the hammer limb from the connecting surface; the connecting rod is limitedly matched with the hammer limb in the insertion direction through the second limiting member;

[0013] The hammer shoe is sleeved on the surface of the connecting rod and is in airtight sliding connection with the connecting rod; the connecting rod is provided with the third limiting member at one end away from the hammer limb to limit the movement of the hammer shoe in a direction away from the hammer limb.

[0014] In a preferred embodiment, the second limiting member is a second pin; the connecting rod and the hammer limb are engaged with each other in a latching manner via the second pin.

[0015] In a preferred embodiment, the hammer limb is provided with a pair of fourth clearance through holes within the penetration length of the connecting rod; the connecting rod is provided with a plurality of second clearance through holes at intervals along the penetration direction; the second pin passes through the fourth clearance through hole and the second clearance through hole at the same time to fix the connecting rod on the hammer limb;

[0016] The spacing distribution of the second clearance through holes matches the thickness arrangement of the hammer shoe.

[0017] In a preferred embodiment, a plurality of hammer shoes are sleeved on the connecting rod, and the thickness of the hammer shoes is equal;

[0018] The second through holes are evenly spaced along the direction in which the connecting rod is inserted.

[0019] In a preferred embodiment, the connecting surface extends in a direction parallel to the axis of the hammer body; the connecting rod penetrates into the connecting surface along the diameter direction of the hammer body; and the spacing between two adjacent second clearance holes is equal to the thickness of the hammer shoe.

[0020] In a preferred embodiment, the third limiting member is a third pin; the third pin is inserted into the connecting rod and extends out of the connecting rod for a certain length to cooperate with the hammer shoe for limiting position.

[0021] In a preferred embodiment, when the second pin or the third pin is passed through the connecting rod, bending sections are provided at both ends.

[0022] In a preferred embodiment, the fixing member is a screw;

[0023] The hammer shoe is sleeved on the surface of the screw rod; a nut is provided at the end of the screw rod to limit the movement of the hammer shoe in a direction away from the hammer limb;

[0024] The hammer limb is provided with a threaded inner groove inwardly from the connection surface; the screw rod is matched with the thread of the threaded inner groove to fix the hammer shoe on the connection surface.

[0025] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0026] The impact hammer provided by the present invention can skillfully and quickly construct different punching diameters by adjusting the thickness of the hammer shoe on the outer periphery of the hammer limb, thereby meeting the construction needs of different pile diameters;

[0027] At the same time, the impact hammer provided by the present invention can accommodate a counterweight block in the hammer cap at the top, and the first limiting member and the hammer cap fix the counterweight block through a detachable connection, so that the impact hammer can adjust its own punching weight according to different geological conditions.

[0028] In summary, the impact hammer has wide applicability to punching operations in various engineering profiles through free diameter change and weight adjustment, thereby improving construction efficiency and saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional schematic diagram of the impact hammer described in an embodiment of the present invention;

[0030] Figure 2 is a top view of the impact hammer described in an embodiment of the present invention;

[0031] Figure 3 A partial exploded view of the impact hammer described in an embodiment of the present invention;

[0032] Figure 4 Schematic diagram of the connection between the connecting rod and the hammer limb in an embodiment of the present invention;

[0033] Figure 5 It is a three-dimensional schematic diagram of the hammer cap and the first limiting member in an embodiment of the present invention.

[0034] Marked in the figure: 1-hammer body, 11-hammer limb, 111-connecting surface, 112-fourth yielding through hole, 2-hammer shoe, 21-yielding through cavity, 3-fixing piece, 31-connecting rod, 311-second yielding through hole, 312-third yielding through hole, 32-second limiting piece, 320-second pin, 33-third limiting piece, 330-third pin, 4-hammer cap, 41-first yielding through hole, 42-opening, 5-first limiting piece, 51-first pin. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "installed / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted 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 an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0038] As shown in the figure, an embodiment of the present invention provides an impact hammer for a pile driver, including a hammer body 1, a hammer shoe 2 and a fixing member 3. In general, the hammer body 1 has a plurality of hammer limbs 11 extending radially outward. The outer periphery of the hammer limb 11 is configured with a connecting surface 111. A plurality of hammer shoes 2 are detachably fixed to the connecting surface 111 using the fixing member 3. A plurality of hammer shoes 2 on the same connecting surface 111 form a hammer shoe group, and the thickness of the hammer shoe group is adjustable along the diameter direction of the hammer body 1 to construct different drilling diameters. The hammer body 1 is also provided with a hollow hammer cap 4 at the top to install counterweights of different specifications to achieve adjustable weight of the impact hammer.

[0039] The following text, in conjunction with the diagrams, describes in detail the specific structure of each component and their interconnection relationship.

[0040] The hammer body 1 extends radially outwardly to form a plurality of hammer limbs 11, which form a claw-shaped structure as a whole. As a prior art, the specific structure of the hammer body 1 itself is not described in detail herein. As shown in the figure, the outer periphery of the hammer limb 11 is structured with a connecting surface 111. The hammer shoe 2 fits on the connecting surface 111 to achieve a closed connection with the hammer limb 11. Specifically, in this embodiment, the plurality of connecting surfaces 111 are all located on a cylindrical surface formed with the axis of the hammer body 1 as the center, that is, the connecting surface 111 extends in a direction parallel to the axis of the hammer body 1, and the radius of any two connecting surfaces 111 to the axis of the hammer body 1 is equal. This structure is conducive to directly equating the thickness increase or decrease of the hammer shoe 2 to the change in the drilling diameter of the impact hammer. It can be understood that as long as it can fit with the hammer shoe 2, the shape of the connecting surface 111 should not be limited. It can be a regular plane or arc surface, or it can be constructed as an irregular shape to improve the bite effect with the hammer shoe 2.

[0041] As shown in the figure, in this embodiment, the total thickness of the hammer shoe group fixed on each connection surface 111 is obtained by stacking several hammer shoes 2. In this embodiment, the thickness of the hammer shoe 2 is equal, which can be 5 cm, 7.5 cm, 10 cm... and other values ​​that are convenient for cumulative calculation. It should be understood that as long as the hammer body 1 can adapt to different drilling diameters by stacking the hammer shoes 2, the thickness specifications of the hammer shoes 2 should not be limited. For example, in other implementations, one hammer shoe group can be composed of three hammer shoes 2 of different thicknesses of 5 cm, two hammer shoes of 10 cm, one hammer shoe of 15 cm..., etc., so as to be combined according to actual needs. Furthermore, the total thickness of the hammer shoe group fixed on each connection surface 111 can also be adjusted by replacing the hammer shoe 2, that is, one hammer shoe group can include hammer shoes 2 of different thicknesses such as 10 cm, 15 cm, 20 cm, 25 cm, etc. If the pile diameter is 40 cm wider than the hammer body 1, a 20 cm thick hammer shoe 2 is fixed on each of the connection surfaces 111; if the pile diameter is 50 cm wider than the hammer body 1, a 25 cm thick hammer shoe 2 is fixed on each of the connection surfaces 111, and so on. In this embodiment, in order to make the pile hole finally drilled as close to a circle as possible, the hammer shoe 2 is constructed as a circular arc as a whole.

[0042] As shown in the figure, the fixing member 3 includes a connecting rod 31, a second pin 320 and a third pin 330. In this embodiment, the second limiting member 32 adopts the second pin 320, and the third limiting member 33 adopts the third pin 330. The connecting rod 31 is inserted into the connecting surface 111 along the diameter direction of the hammer body 1, and is in airtight sliding connection with the hammer limb 11. The hammer shoe 2 is provided with a clearance cavity 21 along the thickness direction, so as to be sleeved on the surface of the connecting rod 31 to achieve airtight sliding connection with the connecting rod 31. The connecting rod 31 is provided with a third clearance hole 312 at one end away from the hammer limb 11, and the third pin 330 penetrates the third clearance hole 312 and extends a length of the connecting rod 31 to limit the hammer shoe 2 from falling off from the connecting rod 31 in the direction away from the hammer limb 11. The hammer limb 11 is provided with a pair of fourth clearance holes 112 within the penetration length range of the connecting rod 31. Correspondingly, the connecting rod 31 is provided with a plurality of second clearance holes 311 at intervals along the penetration direction. During actual installation, after pushing the connecting rod 31 to make the hammer shoe 2 fit the connecting surface 111, the second pin 320 is simultaneously passed through the fourth clearance hole 112 and a specific second clearance hole 311, and the connecting rod 31 is restricted from sliding further by latch-type cooperation, so that the hammer shoe 2 is fixed to the outer periphery of the hammer limb 11. It is not difficult to understand that when the second pin 320 exits the fourth clearance hole 112 and the second clearance hole 311, the connecting rod 31 can slide relative to the hammer limb 11 to remove or continue to add the hammer shoe 2.

[0043] In order to ensure that the hammer shoe 2 can be exactly fitted on the connecting surface 111 when being fixed, the spacing distribution of the second clearance through holes 311 and the thickness arrangement of the hammer shoe 2 must match each other. Specifically, in this embodiment, since the hammer shoe 2 of equal thickness is used, the spacing between any two adjacent second clearance through holes 311 is equal to the thickness of the hammer shoe 2, and the distance from the third clearance through hole 312 to the nearest second clearance through hole 311 is also equal to the thickness of the hammer shoe 2.

[0044] Furthermore, in order to prevent the second pin 320 or the third pin 330 from falling off under strong vibration when it is inserted into the connecting rod 31, the second pin 320 and the third pin 330 are folded at both ends so as to be stuck on both sides of the above-mentioned limiting hole.

[0045] As an equivalent replacement of the present embodiment, in other embodiments, the fourth clearance through hole 112 and the second clearance through hole 311 can be interchanged, that is, one second clearance through hole 311 is provided on the connecting rod 31, and a plurality of the fourth clearance through holes 112 are provided at intervals along the penetration direction of the hammer limb 11 along the connecting rod 31. Similarly, the spacing distribution of the fourth clearance through holes 112 and the thickness arrangement of the hammer shoe 2 must match each other. The second pin 320 is still used between the connecting rod 31 and the hammer limb 11 for latch-type engagement. In other embodiments, the third limiting member 33 can also be an end plate provided at the end of the connecting rod 31. The end plate is fixed to an end face of the connecting rod 31 away from the hammer limb 11, and extends a certain width to limit the hammer shoe 2 from detaching from the connecting rod 31 in the direction away from the hammer limb 11.

[0046] In another embodiment, the fixing member 3 may be a screw. The surface of the screw is provided with threads. The hammer shoe 2 is provided with a first through hole along the thickness direction to be sleeved on the surface of the screw. The inner diameter of the first through hole is not less than the outer diameter of the thread, so that the hammer shoe 2 is slidably connected to the screw. The screw is provided with a nut at the end away from the hammer limb 11 to limit the hammer shoe 2 from detaching from the screw in the direction away from the hammer limb 11. The hammer limb 11 is provided with a section of threaded inner groove inwardly from the connecting surface 111, and the screw is fixed to the connecting surface 111 by cooperating with the thread of the threaded inner groove. This fixing method not only has a stable connection, but also allows the hammer shoe 2 to be quickly disassembled and assembled.

[0047] A hollow hammer cap 4 is provided on the top of the hammer body 1, and a pair of openings 42 are provided on the side wall of the hammer cap 4 for the rope to pass through and lift the impact hammer. As a prior art, this article does not elaborate on this part of the structure. As shown in the figure, a counterweight block can be accommodated in the hollow cavity of the hammer cap 4. In order to prevent the counterweight block from separating from the hammer cap 4 during operation, the impact hammer is also provided with a first limiter 5. The first limiter 5 is engaged with the hammer cap 4 in a latch-like manner through a pair of first clearance through holes 41 on the side wall of the hammer cap 4, thereby fixing the counterweight block. The height of the first clearance through hole 41 is not lower than the placement height of the counterweight block. Similarly, in order to prevent the first limiter 5 from falling off during the punching operation, first pins 50 are provided at both ends of the first limiter 5, and the first pin 50 is bent at both ends to more stably fix the first limiter 5. The first stopper 5 can be in various forms. For example, in other embodiments, the first stopper can be a snap-on end cap, which can be detachably fixed to the top of the hammer cap 4. The first stopper 5 can also be a cork stopper, which can easily achieve a sealed connection and separation with the hammer cap 4. It should be understood that the first stopper 5 is described in this article to reflect the feasibility of the technical solution. As a non-core essential point, this article does not limit it.

[0048] The above description is only a preferred specific implementation mode of the present invention, and does not limit the patent scope of the present invention. Any technical equivalent changes made using the contents of the present invention specification shall fall within the protection scope of the present invention.

Claims

1. An impact hammer for a pile driver, characterized in that: It includes hammer body, hammer shoe and fixing parts; The hammer body is provided with a plurality of hammer limbs extending radially outward; the outer periphery of the hammer limbs is provided with a connecting surface, and a plurality of hammer shoes are detachably fixed on the connecting surface through the fixing member; A plurality of hammer shoes on the same connecting surface form a hammer shoe group, and the thickness of the hammer shoe group is adjustable along the diameter direction of the hammer body.

2. The impact hammer for a pile driver according to claim 1, characterized in that: The top of the hammer body is provided with a hollow hammer cap to accommodate a counterweight block; The impact hammer also includes a first limiting member; the first limiting member is detachably connected to the hammer cap to limit the counterweight block from being separated from the hammer cap.

3. The impact hammer for a pile driver according to claim 1, characterized in that: The fixing member includes a connecting rod, a second limiting member and a third limiting member; The connecting rod is inserted into the hammer limb from the connecting surface; the connecting rod is limitedly matched with the hammer limb in the insertion direction through the second limiting member; The hammer shoe is sleeved on the surface of the connecting rod and is in airtight sliding connection with the connecting rod; the connecting rod is provided with the third limiting member at one end away from the hammer limb to limit the movement of the hammer shoe in a direction away from the hammer limb.

4. The impact hammer for a pile driver according to claim 3, characterized in that: The second limiting member is a second pin; the connecting rod and the hammer limb are engaged with each other in a latching manner via the second pin.

5. The impact hammer for a pile driver according to claim 4, characterized in that: The hammer limb is provided with a pair of fourth clearance through holes within the penetration length of the connecting rod; the connecting rod is provided with a plurality of second clearance through holes at intervals along the penetration direction; the second pin passes through the fourth clearance through hole and the second clearance through hole at the same time to fix the connecting rod on the hammer limb; The spacing distribution of the second clearance through holes matches the thickness arrangement of the hammer shoe.

6. The impact hammer for a pile driver according to claim 5, characterized in that: A plurality of hammer shoes are sleeved on the connecting rod, and the hammer shoes have the same thickness; The second through holes are evenly spaced along the direction in which the connecting rod is inserted.

7. The impact hammer for a pile driver according to claim 6, characterized in that: The connecting surface extends in a direction parallel to the axis of the hammer body; the connecting rod penetrates into the connecting surface along the diameter direction of the hammer body; and the spacing between two adjacent second clearance through holes is equal to the thickness of the hammer shoe.

8. An impact hammer for a pile driver according to any one of claims 4 to 7, characterized in that: The third limiting member is a third pin; the third pin is inserted into the connecting rod and extends out of the connecting rod for a certain length to be limitedly matched with the hammer shoe.

9. The impact hammer for a pile driver according to claim 8, characterized in that: When the second pin or the third pin is passed through the connecting rod, bending sections are provided at both ends.

10. The impact hammer for a pile driver according to claim 1, characterized in that: The fixing member is a screw; The hammer shoe is sleeved on the surface of the screw rod; a nut is provided at the end of the screw rod to limit the movement of the hammer shoe in a direction away from the hammer limb; The hammer limb is provided with a threaded inner groove inwardly from the connection surface; the screw rod is matched with the thread of the threaded inner groove to fix the hammer shoe on the connection surface.

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