CN220726208U - Pile machine - Google Patents

Abstract

The utility model discloses a pile machine, which comprises a telescopic drill rod, a pile frame and a telescopic locking mechanism, wherein a drill bit is arranged at the lower end of the telescopic drill rod, the pile frame is used for supporting the telescopic drill rod, the telescopic drill rod comprises a plurality of sections of drill rod sections which are sequentially sleeved in an axial mode, when two adjacent sections of drill rod sections are in a contracted state, a contraction locking part is arranged on the outer wall of the end part of the same end of each of the two sections of drill rod sections, the telescopic locking mechanism comprises a contraction locking part used for limiting the extension of the telescopic drill rod, one end of the contraction locking part is clamped to the contraction locking part of one section of drill rod section, and the other end of the contraction locking part is clamped to the contraction locking part of the other section of drill rod section. The two adjacent sections of drill rod sections are locked through the shrinkage locking piece, so that the drill rod sections are prevented from extending out of the adjacent sections of drill rod under the actions of dead weight, gravity of the drill bit and vibration, and further damage to the telescopic drill rod and the drill bit and even damage to a pile machine due to elongation of the telescopic drill rod are avoided.

Description

Pile machine

Technical Field

The utility model relates to the technical field of construction equipment, in particular to a pile machine.

Background

On construction sites, the depth of the pile hole is generally tens of meters, the integrated long drilling rod is very inconvenient in the production, the installation and the transportation processes, the existing pile machine generally adopts an extensible telescopic drilling rod, and the telescopic drilling rod is extended to adapt to the depth requirement of the pile hole along with the increase of the depth of the pile hole.

Telescoping drill pipes are typically used to extend drill pipes in a telescoping fashion by sleeving sections of drill pipe together. The retraction of the telescopic drill rod of the existing pile machine is generally driven by a power source, and when the drill rod is completely retracted and the power source is closed, the condition of extension due to the dead weight of the drill rod section is easy to occur, so that the stability is poor.

Disclosure of Invention

The utility model aims to provide a pile machine, which solves the problem that a telescopic drill rod automatically stretches due to dead weight after being completely retracted.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a stake machine, includes that the lower extreme installs the flexible drilling rod of drill bit, support flexible drilling rod's stake frame, flexible locking mechanical system, flexible drilling rod includes the multisection axial suit's drilling rod festival in proper order, two sections adjacent when the drilling rod festival is the shrink state, two sections the tip outer wall of the same one end of drilling rod festival is equipped with shrink locking part, flexible locking mechanical system is including being used for restricting the extension of flexible drilling rod shrink locking part, one end joint of shrink locking part in one section the shrink locking part of drilling rod festival, the other end joint of shrink locking part in another section the shrink locking part of drilling rod festival.

Compared with the prior art, the utility model has the beneficial effects that: except the outermost drill rod section when the telescopic drill rod does not work, other drill rod sections are in a contracted state, and the telescopic drill rod is stretched out of one section normally when the telescopic drill rod stretches, the drill rod section which does not stretch out is also in the contracted state, and two adjacent drill rod sections which need to be kept in the contracted state are locked through the contraction locking piece, so that the drill rod sections stretch out from the adjacent drill rod sections under the actions of dead weight, gravity of a drill bit and vibration, and damage to the telescopic drill rod and the drill bit caused by stretching of the telescopic drill rod is avoided, and even a pile machine is damaged. According to the pile machine provided by the utility model, the contracted drill rod section is locked by the contracted locking piece, so that the pile machine is high in stability, and when the drill rod section needs to be stretched out, the contracted locking piece on the drill rod section is removed.

Preferably, the telescopic locking mechanism further comprises an extension locking piece for limiting the telescopic drill rod to shrink, an extension locking part is arranged on the outer wall of one end, far away from the shrinkage locking part, of each drill rod section, when two adjacent sections of the drill rod sections are in an extension state, the extension locking piece is installed on the extension locking part of each inner section of the drill rod section, and the extension locking piece is abutted with each outer section of the drill rod section so as to limit the vertical shrinkage of the two adjacent sections of the drill rod sections.

Preferably, the telescopic drill rod further comprises a mounting assembly which is positioned at any position in the circumferential direction of the telescopic drill rod and used for mounting the telescopic locking piece or the extension locking piece on the telescopic drill rod;

the installation assembly comprises a rotating table rotatably installed on the pile frame and an installation piece installed on the rotating table and capable of moving towards the direction approaching to or away from the telescopic drill rod, and the installation piece is magnetically connected with the shrinkage locking piece or the extension locking piece;

alternatively, the mounting assembly includes a robotic arm provided with a robotic arm.

Preferably, the pile driving device further comprises a storage bin for taking or storing the shrinkage locking piece and/or the extension locking piece, the storage bin is arranged on the pile frame, and the storage bin is provided with a plurality of storage grids for storing the extension locking piece and/or the shrinkage locking piece.

Preferably, the telescopic locking piece and the extension locking piece are magnetically connected with the telescopic drill rod;

and/or the shrinkage locking piece comprises two locking convex blocks, wherein the length of one locking convex block along the radial direction is larger than that of the other locking convex block.

Preferably, the shrinkage locking piece and the extension locking piece comprise two arc plates, the arc plates of the shrinkage locking piece face the side face of the telescopic drill rod and are matched with the shrinkage locking part, the arc plates of the extension locking piece face the side face of the telescopic drill rod and are matched with the extension locking part, the pile frame is symmetrically provided with two installation assemblies, and the two installation assemblies are respectively correspondingly provided with the shrinkage locking piece or the two arc plates of the extension locking piece.

Preferably, the drill rod section of the lowermost section is provided with a connection socket, which is connected to the drill bit.

Preferably, a sealing assembly is arranged between two adjacent sections of the drill rod section, the sealing assembly comprises a sealing seat detachably arranged at one end of the drill rod section, and when the two adjacent sections of the drill rod section are in a contracted state, the sealing seat of the outer section of the drill rod section is abutted with the sealing seat of the inner section of the drill rod section.

Preferably, when two adjacent sections of the drill rod sections are in an elongation state, one end of the inner section of the drill rod section, which is far away from the sealing seat, is provided with a first limiting part protruding outwards in the radial direction and abutting against the sealing seat of the outer section of the drill rod section.

Preferably, the first limiting part and the drill rod section are of an integrated structure; or the first limiting part is in threaded connection or welded on the drill rod section;

and/or the shrinkage locking part is arranged on the sealing seat.

Drawings

FIG. 1 is a schematic perspective view of a pile driver;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a cross-sectional view of a drill rod section;

FIG. 4 is a schematic view of a telescopic drill rod;

FIG. 5 is a cross-sectional view of a telescoping drill rod;

FIG. 6 is an enlarged view of part B of FIG. 5;

FIG. 7 is a schematic view of yet another telescopic drill rod;

FIG. 8 is a cross-sectional view of yet another telescoping drill rod;

FIG. 9 is an enlarged view of a portion C of FIG. 8;

fig. 10 is a schematic perspective view of the storage.

In the figure: 1. a pile frame;

2. a drill bit;

3. a mast frame;

41. a rotating table; 42. a mounting member;

5. a drill rod section; 51. a first limit part; 52. a connecting seat; 53. an extension locking portion; 54. a shrink locking part;

6. a sealing seat;

71. a shrink lock; 711. a locking projection; 72. an elongated locking member;

8. and (5) a storage warehouse.

Detailed Description

In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description.

In the present specification, the terms "upper, lower, inner, outer" and the like are established based on the positional relationship shown in the drawings, and the corresponding positional relationship may be changed according to the drawings, so that the terms are not to be construed as absolute limitation of the protection scope; moreover, relational terms such as "first" and "second", and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

Examples

As shown in fig. 1, 4, 5 and 6, this embodiment provides a pile machine, including the flexible drilling rod of drill bit 2 is installed to the lower extreme, pile frame 1 supporting flexible drilling rod, flexible locking mechanism, flexible drilling rod is movably installed on the mast frame 3 of pile frame 1, flexible drilling rod includes the drilling rod festival 5 of multisection axial suit in proper order, when two sections adjacent drilling rod festival 5 are the shrink state, the tip outer wall of two sections drilling rod festival 5 same one end is equipped with shrink locking part 54, flexible locking mechanism includes the shrink locking piece 71 that is used for restricting flexible drilling rod extension, the one end joint of shrink locking piece 71 is in the shrink locking part 54 of one section drilling rod festival 5, the other end joint of shrink locking piece 71 is in the shrink locking part 54 of another section drilling rod festival 5.

Specifically, when the telescopic drill rod is not in operation, except for the outermost drill rod section 5, the rest of the drill rod sections 5 are in a contracted state, and when the telescopic drill rod is extended, one section of the drill rod section 5 is extended, the two adjacent sections of the drill rod sections 5 which are not extended are also in the contracted state and are required to be kept in the contracted state are locked by the contraction locking piece 71, so that the situation that the drill rod sections 5 extend from the adjacent drill rod sections 5 under the action of dead weight, gravity of the drill bit 2 and vibration is avoided, and further damage to the telescopic drill rod and the drill bit 2 and even damage to a pile machine due to extension of the telescopic drill rod are avoided. In the pile driver provided by the embodiment, the contracted locking piece 71 is used for locking the drill rod section 5 in the contracted state, so that the pile driver is high in stability, and when the drill rod section 5 needs to be stretched out, the contracted locking piece 71 on the drill rod section 5 can be removed.

Preferably, the mast frame 3 comprises a mast and a supporting frame which are arranged on the pile frame 1, the supporting frame plays an auxiliary supporting role on the mast, the stability of the mast is enhanced, and the telescopic drill rod is movably arranged on the mast.

In the pile hole drilling process, a certain pressure is required to be given to the telescopic drill rod to drive the drill bit 2 to dig downwards, after the telescopic drill rod is stretched, the stretched telescopic drill rod is required to be locked, and the telescopic drill rod is prevented from being shortened again under the action of the pressure. As shown in fig. 7, 8 and 9, the telescopic locking mechanism further comprises an extension locking piece 72 for limiting the contraction of the telescopic drill rod, the outer wall of one end of the drill rod section 5 far away from the contraction locking portion 54 is provided with an extension locking portion 53, when two adjacent drill rod sections 5 are in an extension state, the extension locking piece 72 is mounted on the extension locking portion 53 of the inner drill rod section 5, and when the telescopic drill rod has a shortening trend, the extension locking piece 72 can be abutted with the outer drill rod section 5, so that the vertical contraction of the two adjacent drill rod sections 5 is limited.

As shown in fig. 1 and 2, the stake machine further includes a mounting assembly located at any circumferential location on the telescoping drill pipe for mounting either the telescoping lock 71 or the extension lock 72 to the telescoping drill pipe. When two adjacent sections of drill rod sections 5 are in a contracted state, one end of the contraction locking piece 71 is clamped to the contraction locking part 54 of one section of drill rod section 5 through the mounting assembly, meanwhile, the other end of the contraction locking piece 71 is clamped to the contraction locking part 54 of the other section of drill rod section 5, and similarly, when two adjacent sections of drill rod sections 5 need to be stretched, the contraction locking piece 71 mounted on the drill rod section 5 is removed through the mounting assembly. When two adjacent sections of drill rod sections 5 are in an extension state, the extension locking piece 72 is installed on the extension locking part 53 of the inner section of drill rod section 5 through the installation assembly, and similarly, when two adjacent sections of drill rod sections 5 need to be contracted, the extension locking piece 72 installed on the inner section of drill rod section 5 is removed through the installation assembly.

Specifically, the mounting assembly includes a rotary table 41 rotatably mounted to the pile frame 1, and a mounting member 42 mounted to the rotary table 41 and movable in a direction approaching or separating from the telescopic drill rod, and the mounting member 42 is magnetically coupled to the telescopic locking member 71 or the telescopic locking member 72. When two adjacent sections of drill rod sections 5 are in a contracted state, the installing piece 42 is magnetically connected with the contraction locking piece 71, the rotating table 41 rotates and drives the installing piece 42 installed on the rotating table 41 to rotate so as to align the contraction locking piece 71 with the contraction locking parts 54 of the two adjacent sections of drill rod sections 5, and the installing piece 42 moves towards the direction approaching to the telescopic drill rod so as to drive the contraction locking piece 71 to move to the contraction locking parts 54 with two ends respectively clamped on the two adjacent sections of drill rod sections 5. When two adjacent sections of drill rod 5 need to be extended, the mounting piece 42 moves towards the direction approaching the telescopic drill rod to magnetically attract and connect the shrinkage locking piece 71, and then moves towards the direction away from the telescopic drill rod to remove the shrinkage locking piece 71 from the shrinkage locking parts 54 of the two adjacent sections of drill rod 5. When two adjacent sections of drill rod sections 5 are in an extension state, the installation piece 42 is magnetically connected with the extension locking piece 72, the rotating table 41 rotates and drives the installation piece 42 installed on the rotating table 41 to rotate so as to align the extension locking piece 72 with the extension locking part 53 of the inner section of drill rod section 5, and the installation piece 42 moves towards the direction approaching to the extension drill rod so as to drive the extension locking piece 72 to be clamped with the extension locking part 53 of the inner section of drill rod section 5. When two adjacent sections of drill pipe 5 need to be contracted, the mounting member 42 moves towards the direction approaching the telescopic drill pipe to magnetically attract and connect the extension locking member 72, and then moves towards the direction away from the telescopic drill pipe to remove the extension locking member 72 from the extension locking portion 53 of the inner section of drill pipe 5. In detail, the rotating table 41 is provided with a rotary power source, and the rotating table 41 is rotated by the rotary power source, thereby driving the mounting member 42 to rotate. The mounting member 42 is provided with a translational drive that drives the mounting member 42 to translate in a direction toward or away from the telescoping drill pipe. The mounting member 42 is provided with a magnetic tip on which an electromagnet is provided, by which a magnetic force is provided. The translation drive is one of a hydraulic cylinder and an air cylinder, and the rotary power source is one of a motor, a pneumatic motor and a hydraulic motor.

Alternatively, the mounting assembly includes a robotic arm provided with a robotic arm. The retraction lock 71 or the extension lock 72 is installed or removed by a mechanical arm, the specific process is referred to above, and the mechanical arm is a mature prior art, and the specific structure of the mechanical arm will not be described in detail here.

As shown in fig. 10, the pile machine further comprises a storage 8 for taking or storing the shrinkage locking member 71 and/or the extension locking member 72, wherein the storage 8 is arranged on the pile frame 1, and the storage 8 is provided with a plurality of storage grids for storing the extension locking member 72 and/or the shrinkage locking member 71. Because the telescopic drill rod is composed of a plurality of sections of drill rod sections 5 which are axially sleeved, the sizes of each section of drill rod section 5 are different, and the sizes of the telescopic locking piece 71 and the telescopic locking piece 72 on the sections of drill rod 5 with different sizes are also different, so that various types of telescopic locking pieces 71 and telescopic locking pieces 72 exist, and various types of telescopic locking pieces 71 and telescopic locking pieces 72 can be well stored in the storage warehouse 8 with a plurality of storage grids, and the telescopic locking pieces 71 and the telescopic locking pieces 72 are convenient to install and store. Specifically, the retraction locking member 71 and the extension locking member 72 may be taken and stored by rotating the rotating table 41 of the mounting assembly, moving and magnetically attracting the mounting member 42, specifically, the mounting member 42 is provided with a lifting drive to drive the mounting member 42 to lift or descend to align the retraction locking member 71 and the extension locking member 72 of the corresponding model, and then translate to connect the retraction locking member 71 and the extension locking member 72 of the corresponding model by a translation drive. Or the retraction lock 71 and the extension lock 72 may be accessed and stored by a robotic arm.

Further, the telescopic drill rod is connected through magnetic attraction of the telescopic locking piece 71 and the telescopic locking piece 72, and the telescopic locking piece 71 and the telescopic locking piece 72 are attracted to the telescopic drill rod through magnetic force, so that the telescopic locking piece 71 and the telescopic locking piece 72 are prevented from being separated from the drill rod section 5 when being stressed. The magnetic forces of the retraction lock 71 and the extension lock 72 on the drill rod segment 5 are less than the magnetic forces of the magnetic tip on the retraction lock 71 and the extension lock 72 so that the retraction lock 71 and the extension lock 72 can be removed from the drill rod segment 5. The contraction lock member 71 and the extension lock member 72 are formed of a permanent magnet material or a combination of a permanent magnet material and a metal, and preferably, the contraction lock member 71 and the extension lock member 72 are composed of steel No. 45 and a magnet applied to the steel No. 45.

As shown in fig. 5 and 6, further, the shrinkage locking member 71 includes two locking protrusions 711, wherein one locking protrusion 711 has a longer radial length than the other locking protrusion 711, and the two locking protrusions 711 are respectively clamped on the shrinkage locking portions 54 of the two adjacent sections of drill pipe 5, and the two adjacent sections of drill pipe 5 are axially sleeved, that is, the two adjacent sections of drill pipe 5 have a diameter difference, and the two locking protrusions 711 with a longer length are used for better adapting to the two sections of drill pipe 5 with different diameters, so that the stability of the shrinkage locking member 71 is higher.

As shown in fig. 10, further, the retraction lock 71 and the extension lock 72 comprise two arcuate plates which cooperate to form the retraction lock 71 or the extension lock 72, the provision of two arcuate plates which are separate from the retraction lock 71 and the extension lock 72 facilitates the mounting of the retraction lock 71 and the extension lock 72 to the drill rod segment 5. The two locking lugs 711 are respectively located at two vertical ends of the arc-shaped plate of the shrinkage locking piece 71, preferably, the side surface of the arc-shaped plate of the shrinkage locking piece 71 facing the telescopic drill rod is matched with the shrinkage locking part 54, so that the arc-shaped locking lugs 711 can be conveniently installed, the contact area between the locking lugs 711 and the shrinkage locking part 54 is increased, and the stability is enhanced. Preferably, the side of the arc-shaped plate of the extension locking piece 72 facing the telescopic drill rod is matched with the extension locking part 53, so that the contact area between the arc-shaped plate and the drill rod section 5 is increased, and the stability is enhanced. The pile frame 1 is symmetrically provided with two mounting assemblies which respectively and correspondingly mount two arc plates of the shrinkage locking piece 71 or the extension locking piece 72.

As shown in fig. 1, 4 and 7, further, the drill rod section 5 of the lowermost section is provided with a connection seat 52, the connection seat 52 being connected to the drill bit 2. The lowest section of the drill rod section 5 is welded or screwed with the connecting seat 52, the strength and the material requirement of the connecting seat 52 are inconsistent with those of the drill rod section 5, and the two parts of the drill rod section 5 and the connecting seat 52 are arranged into the parts, so that the processing difficulty is reduced, and the production cost of the pile machine is reduced.

As shown in fig. 3, 5, 6, 8 and 9, further, a sealing assembly is disposed between two adjacent sections of drill rod sections 5, the sealing assembly includes a sealing seat 6 detachably mounted at one end of the drill rod section 5, and when two adjacent sections of drill rod sections 5 are in a contracted state, the sealing seat 6 of the outer section of drill rod section 5 abuts against the sealing seat 6 of the inner section of drill rod section 5, so as to prevent the inner section of drill rod section 5 from being completely retracted into the outer section of drill rod section 5. The sealing seat 6 is provided with a sealing element, and the sealing element of the sealing seat 6 of the outer section drill rod section 5 is in sealing contact with the outer wall of the inner section drill rod section 5.

As shown in fig. 3 and 8, when two adjacent sections of drill pipe sections 5 are in an extended state, one end of the inner section of drill pipe section 5, which is far away from the seal seat 6, is provided with a first limit part 51 protruding radially outwards and abutting against the seal seat 6 of the outer section of drill pipe section 5. When two adjacent drill rod sections 5 extend, the first limiting part 51 of the inner drill rod section 5 is abutted with the sealing seat 6 of the outer drill rod section 5, so that the inner drill rod section 5 and the outer drill rod section 5 are prevented from being completely separated.

Further, the first limiting part 51 and the drill rod section 5 are of an integrated structure, which is beneficial to increasing the overall strength of the drill rod section 5. Of course, the first limiting part 51 can also be screwed or welded on the drill rod section 5, the strength and the material requirement of the first limiting part 51 are inconsistent with those of the drill rod section 5, and the two parts of the drill rod section 5 and the first limiting part 51 are arranged into separate parts, so that the processing difficulty is reduced, and the production cost of the pile machine is reduced.

As shown in fig. 5 and 6, further, a shrink locking part 54 is disposed on the sealing seat 6, the shrink locking part 54 is provided with a locking groove, and the sealing seat 6 mounted on the drill rod section 5 is provided with the groove without grooving on the drill rod section 5, so as to avoid the overall strength of the drill rod section 5 from being reduced. As shown in fig. 8, when two adjacent sections of drill pipe 5 are in an extended state, the seal seat 6 of the outer section of drill pipe 5 abuts against the extension lock piece 72 of the inner section of drill pipe 5.

At least some of the technical implementations in the examples may be combined or replaced without departing from the contradiction between the gist and technical means of the present utility model.

The foregoing is merely a preferred embodiment of the present utility model, and the scope of the utility model is defined by the claims, and those skilled in the art should also consider the scope of the present utility model without departing from the spirit and scope of the utility model.

Claims (10)

1. The utility model provides a stake machine, its characterized in that, including the flexible drilling rod that installs drill bit (2) in the lower extreme, support flexible drilling rod's stake frame (1), flexible locking mechanical system, flexible drilling rod includes multisection axial suit's drilling rod festival (5) in proper order, two sections adjacent when drilling rod festival (5) are the shrink state, two sections the tip outer wall of drilling rod festival (5) with one end is equipped with shrink locking part (54), flexible locking mechanical system is including being used for the restriction flexible drilling rod extension shrink locking part (71), the one end joint of shrink locking part (71) in one section shrink locking part (54) of drilling rod festival (5), the other end joint of shrink locking part (71) in another section shrink locking part (54) of drilling rod festival (5).

2. Pile machine according to claim 1, characterized in that the telescopic locking mechanism further comprises an extension locking piece (72) for limiting the contraction of the telescopic drill rod, the outer wall of one end of the drill rod section (5) far away from the contraction locking part (54) is provided with an extension locking part (53), when two adjacent sections of the drill rod sections (5) are in an extension state, the extension locking piece (72) is mounted on the extension locking part (53) of the inner section of the drill rod section (5), and the extension locking piece (72) abuts against the outer section of the drill rod section (5) to limit the vertical contraction of the two adjacent sections of the drill rod section (5).

3. A piling machine according to claim 2, further comprising a mounting assembly located at any position circumferentially of the telescoping drill pipe for mounting the telescoping lock (71) or the extension lock (72) to the telescoping drill pipe;

the mounting assembly comprises a rotating table (41) rotatably mounted on the pile frame (1), and a mounting piece (42) mounted on the rotating table (41) and capable of moving towards or away from the telescopic drill rod, wherein the mounting piece (42) is magnetically connected with the telescopic locking piece (71) or the extension locking piece (72);

alternatively, the mounting assembly includes a robotic arm provided with a robotic arm.

4. A pile machine according to claim 3, further comprising a storage (8) for taking or storing the shrink lock (71) and/or the extension lock (72), the storage (8) being provided in the pile housing (1), the storage (8) being provided with a number of storage compartments for storing the extension lock (72) and/or the shrink lock (71).

5. Pile machine according to claim 4, characterised in that the telescopic locking element (71) and the elongate locking element (72) are magnetically connected to the telescopic drill rod;

and/or the shrink lock (71) comprises two locking lugs (711), one of the locking lugs (711) having a greater radial length than the other locking lug.

6. Pile machine according to claim 4, characterized in that the shrink locking element (71) and the extension locking element (72) comprise two curved plates, the curved plate of the shrink locking element (71) is adapted to the shrink locking part (54) towards the side of the telescopic drill rod, the curved plate of the extension locking element (72) is adapted to the extension locking part (53) towards the side of the telescopic drill rod, the pile frame (1) is symmetrically provided with two mounting assemblies, which respectively correspond to the two curved plates of the shrink locking element (71) or the extension locking element (72).

7. Pile machine according to claim 1, characterized in that the drill rod section (5) of the lowermost section is provided with a connection seat (52), which connection seat (52) connects the drill bit (2).

8. Pile machine according to claim 1, characterized in that a sealing assembly is arranged between two adjacent sections of drill rod sections (5), the sealing assembly comprises a sealing seat (6) detachably mounted at one end of each drill rod section (5), and when two adjacent sections of drill rod sections (5) are in a contracted state, the sealing seat (6) of the outer section of drill rod section (5) is abutted against the sealing seat (6) of the inner section of drill rod section (5).

9. Pile machine according to claim 8, characterized in that, when two adjacent sections of the drill rod sections (5) are in an elongated state, the end of the inner section of the drill rod section (5) remote from the sealing seat (6) is provided with a first limit part (51) protruding radially outwards and abutting against the sealing seat (6) of the outer section of the drill rod section (5).

10. Pile machine according to claim 9, characterised in that the first limit part (51) is of integral construction with the drill rod section (5); or the first limiting part (51) is in threaded connection or welded on the drill rod section (5);

and/or the shrinkage locking part (54) is arranged on the sealing seat (6).