Pile hammer with adjustable piston rod

Abstract

The utility model provides a pile hammer with an adjustable piston rod, which belongs to the technical field of pile hammers and structurally comprises a pile hammer frame, an oil cylinder body is vertically arranged at the upper end of the middle of a cavity of the pile hammer frame, and an adjustable piston rod group is movably sleeved in the oil cylinder body. Through the structural combination design of the piston rod piece, the two piston sealing rings, the piston rod connecting base, the compensation block, the hinge base and the screw rod, an adjustable piston rod set is formed, and after a stud head of the piston rod piece is broken due to large stress after being used for a long time, a stud head is turned again at the lower end of the lower rod directly; in order to ensure that the overall length of the adjustable piston rod set is not changed, a compensation block with the same height as a stud head is additionally arranged between a piston rod connecting base and a hinge base for length compensation, and due to the design, one stud head can be turned again for multiple times when a piston rod piece is maintained, so that the piston rod piece can be repeatedly used for multiple times; the piston rod does not need to be directly replaced, and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to an adjustable piston rod pile hammer, belonging to the field of pile hammer technology. Background Technology

[0002] When pile drivers are used for a long time, the threaded connection at the lower end of the piston rod will be subjected to great stress, which will cause the stud head at the lower end of the piston rod to crack, resulting in the need to replace the entire piston rod. The repair cost is very high. In addition, the piston seal ring of the existing piston rod is relatively narrow and thin. I have found that the repeated lifting and lowering effect of the piston rod in the oil cylinder is very poor. In order to address the above shortcomings, this utility model provides a pile driver with an adjustable piston rod. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a piston rod adjustable pile hammer to solve the existing problems.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a piston rod adjustable pile hammer, the structure of which includes a pile hammer frame, and a cylinder body is vertically arranged at the upper end of the middle part of the pile hammer frame cavity, and an adjustable piston rod assembly is movably sleeved in the cylinder body, and a hammer core is hinged to the lower end of the adjustable piston rod assembly, and the hammer core is movably sleeved at the lower end of the pile hammer frame cavity.

[0005] The adjustable piston rod assembly includes a piston rod, and two piston sealing rings are fitted in the middle of the piston rod. A piston rod connecting seat is threaded to the lower end of the piston rod, and a hinge seat is fitted on the bottom surface of the piston rod connecting seat.

[0006] When the lower end of the piston rod is re-threaded and its length is shortened, a compensation block is added between the piston rod connecting seat and the hinge seat and reinforced with multiple screws to compensate for the length of the re-threaded piston rod.

[0007] A further improvement is that the piston rod is integrally formed by the upper rod, piston head and lower rod, the piston head has two sealing ring grooves spaced apart, and the lower end of the lower rod has a stud head;

[0008] The piston seal ring is fitted into the seal ring groove, and the piston seal ring has a width of 40mm and a thickness of 6mm.

[0009] A further improvement is that the piston rod connecting seat is integrally formed by the connecting seat body and the first sleeve column, and the piston rod connecting seat has a stud hole in the middle of the top surface for threaded connection with the stud head, and multiple first threaded through holes are opened at intervals along the periphery of the top surface of the connecting seat body.

[0010] A further improvement is that the compensation block is integrally formed by the compensation block body and the second set of columns. The first set of column grooves is opened in the middle of the top surface of the compensation block body, and multiple second threaded through holes are opened at intervals along the periphery of the top surface of the compensation block body. The thickness of the compensation block body is the same as the height of the stud head.

[0011] A further improvement is that the hinge seat includes a hinge seat body, and a hinge bolt is sleeved on the lower end of the hinge seat body. A second set of column grooves is opened in the middle of the top surface of the hinge seat body. Multiple screw holes are spaced apart on the periphery of the top surface of the hinge seat body. Each first threaded through hole, each second threaded through hole and each screw hole are connected in a corresponding manner.

[0012] A further improvement is that the pile hammer frame, cylinder body, and hammer core are all existing technologies, and their structures will not be described in detail here.

[0013] The beneficial effects of the utility model are:

[0014] This utility model provides an adjustable piston rod piling hammer. Through the structural combination design of a piston rod, two piston sealing rings, a piston rod connecting seat, a compensation block, a hinge seat, and a screw, an adjustable piston rod assembly is formed. If the stud head of the piston rod breaks due to prolonged use and significant stress, a new stud head can be directly machined from the lower end of the lower rod. To ensure that the overall length of the adjustable piston rod assembly remains unchanged, a compensation block of the same height as the stud head is added between the piston rod connecting seat and the hinge seat for length compensation. This design allows the piston rod to be re-machined multiple times during maintenance, enabling repeated use of the piston rod without the need for direct replacement, thus reducing maintenance costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a piston rod adjustable pile hammer structure according to the present invention.

[0016] Figure 2 This is a diagram showing the installation effect of the hydraulic cylinder body, adjustable piston rod assembly, and hammer core of this utility model.

[0017] Figure 3 This is a schematic diagram of the adjustable piston rod assembly structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the piston rod structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the piston rod connecting seat structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the compensation block structure of this utility model;

[0021] Figure 7 This is a schematic diagram of the hinge seat structure of this utility model. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figure 1-7 This utility model discloses a schematic diagram of a piston rod adjustable pile hammer. Its structure includes a pile hammer frame 1, with a cylinder body 2 vertically mounted at the upper part of the cavity of the pile hammer frame 1. An adjustable piston rod assembly 3 is movably sleeved inside the cylinder body 2. A hammer core 4 is hinged to the lower end of the adjustable piston rod assembly 3, and the hammer core 4 is movably sleeved at the lower end of the cavity of the pile hammer frame 1. The adjustable piston rod assembly 3 includes a piston rod 31, with two piston sealing rings 32 fitted in the middle of the piston rod 31. A piston rod connecting seat 33 is threaded to the lower end of the piston rod 31, and a hinge seat 35 is fitted on the bottom surface of the piston rod connecting seat 33. When the lower end of the piston rod 31 is re-threaded and its length is shortened, a compensation block 34 is added between the piston rod connecting seat 33 and the hinge seat 35, and reinforced by multiple screws 36 to compensate for the re-threading length of the piston rod 31.

[0024] The piston rod 31 is integrally formed by the upper rod 311, the piston head 312 and the lower rod 313. The piston head 312 has two sealing ring grooves 314 spaced apart. The lower end of the lower rod 313 has a stud head 315. The piston sealing ring 32 is fitted into the sealing ring groove 314. The piston sealing ring 32 has a width of 40mm and a thickness of 6mm.

[0025] The piston rod connecting seat 33 is integrally formed by the connecting seat body 331 and the first set of studs 332. The piston rod connecting seat 33 has a stud hole 333 in the middle of the top surface for threaded connection with the stud head 315, and the connecting seat body 331 has a plurality of first thread through holes 334 at intervals along the periphery of the top surface.

[0026] The compensation block 34 is integrally formed by the compensation block body 341 and the second set of posts 342. The top surface of the compensation block body 341 is provided with a first set of post grooves 343, and multiple second threaded through holes 344 are provided at intervals along the periphery of the top surface of the compensation block body 341. The thickness of the compensation block body 341 is the same as the height of the stud head 315.

[0027] The hinge seat 35 includes a hinge seat body 351, and a hinge bolt 352 is sleeved on the lower end of the hinge seat body 351. A second set of column grooves 353 is opened in the middle of the top surface of the hinge seat body 351. Multiple screw holes 354 are spaced apart on the periphery of the top surface of the hinge seat body 351. Each first threaded through hole 334, each second threaded through hole 344 and each screw hole 354 are connected in a corresponding manner.

[0028] Working principle:

[0029] The original installation method of this pile hammer is that the stud head 315 on the piston rod 31 is threadedly connected to the stud hole 333 on the piston rod connecting seat 33, and the bottom surface of the piston rod connecting seat 33 is directly fitted with the hinge seat 35 and locked by the screw 36. In use, the cylinder body 2 pulls the adjustable piston rod assembly 3 and the hammer core 4 to rise and fall. When the hammer core 4 hits the pile after falling, the connection between the stud head 315 and the stud hole 333 will bear a lot of stress, causing the stud head 315 to break. The current maintenance method is to re-machine a stud head 315 at the lower end of the lower rod 313, but this will shorten the lower rod 313. In order to keep the stroke of the piston rod 31 unchanged, a compensation block 34 is added between the piston rod connecting seat 33 and the hinge seat 35. It should be noted that every time the stud head 315 is machined, an additional compensation block 34 needs to be added to ensure that the lifting height of the hammer core 4 at the lower end of the pile hammer frame 1 remains unchanged.

[0030] In addition, the piston seal ring 32 is designed with a width of 40mm and a thickness of 6mm, thereby reducing the number of piston seal rings 32 fitted on the piston head 312, increasing the contact area between a single piston seal ring 32 and the inner wall of the cylinder body 2, and making the lifting and sliding performance of the piston rod 31 in the cylinder body 2 more stable.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pile driver with adjustable piston rod, characterized in that: Its structure includes pile hammer frame (1), and the oil cylinder body (2) is vertically arranged on the upper end of the middle part of the cavity of the pile hammer frame (1), and the adjustable piston rod group (3) is movably sleeved in the oil cylinder body (2), the lower end of the adjustable piston rod group (3) is hinged with the hammer core (4), and the hammer core (4) is movably sleeved in the lower end of the cavity of the pile hammer frame (1); The adjustable piston rod group (3) includes a piston rod piece (31), two piston sealing rings (32) are sleeved in the middle part of the piston rod piece (31), and a piston rod connecting seat (33) is threadedly connected to the lower end of the piston rod piece (31), and the bottom surface of the piston rod connecting seat (33) is sleeved with a hinge seat (35); When the lower end of the piston rod piece (31) is re-chucked with threads and the length is shortened, a compensation block (34) is added between the piston rod connecting seat (33) and the hinge seat (35) and is reinforced by a plurality of screw rods (36), and the compensation of the re-chucked length of the piston rod piece (31) is carried out.

2. A drop hammer having an adjustable piston rod according to claim 1, characterized in that: The piston rod piece (31) is integrally composed of an upper rod (311), a piston head (312) and a lower rod (313), two sealing ring sleeve grooves (314) are formed at intervals on the piston head (312), and a stud head (315) is formed at the lower end of the lower rod (313). The piston sealing ring (32) is sleeved in the sealing ring sleeve groove (314), the width of the piston sealing ring (32) is 40mm, and the thickness is 6mm.

3. A drop hammer having an adjustable piston rod according to claim 2, characterized in that: The piston rod connecting seat (33) is integrally composed of a connecting seat body (331) and a first sleeve column (332), a stud hole (333) for threadedly connecting with the stud head (315) is formed in the middle of the top surface of the connecting seat body (331), and a plurality of first threaded through holes (334) are formed at intervals and penetratingly on the top surface of the connecting seat body (331).

4. A drop hammer having an adjustable piston rod according to claim 3, characterized in that: The compensation block (34) is integrally composed of a compensation block body (341) and a second sleeve column (342), a first sleeve column groove (343) is formed in the middle of the top surface of the compensation block body (341), a plurality of second threaded through holes (344) are formed at intervals and penetratingly on the top surface of the compensation block body (341), and the thickness of the compensation block body (341) is the same as the height of the stud head (315).

5. A drop hammer having an adjustable piston rod according to claim 4, characterized in that: The hinge seat (35) includes a hinge seat body (351), a hinge bolt (352) is sleeved at the lower end of the hinge seat body (351), a second sleeve column groove (353) is formed in the middle of the top surface of the hinge seat body (351), a plurality of screw holes (354) are formed at intervals on the top surface of the hinge seat body (351), each first threaded through hole (334), each second threaded through hole (344) and each screw hole (354) are in one-to-one correspondence.

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