CN112982411A

CN112982411A - Pile feeder and pile feeder assembly

Info

Publication number: CN112982411A
Application number: CN201911292977.4A
Authority: CN
Inventors: 方晶; 张竹; 齐涛
Original assignee: Jiangsu Goldwind Science and Technology Co Ltd
Current assignee: Jiangsu Goldwind Science and Technology Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2021-06-18
Anticipated expiration: 2039-12-16
Also published as: CN112982411B

Abstract

The invention provides a pile feeder and a pile feeder assembly, wherein the pile feeder comprises a pile feeder body and a first guide body, the pile feeder body is cylindrical and comprises a first deformation part positioned at the lower part of the pile feeder body, and the inner wall of the first deformation part is gradually inclined inwards from top to bottom; first direction body is the cylindric, and the cover is established in the inside of pile follower body, first direction body include with first deformation portion complex second deformation portion, wherein, pile follower body and first direction body are through the cooperation of first deformation portion and second deformation portion and relative joint, and the effect mode of power between the two is pressure and holding power, has avoided local stress concentration, has improved pile follower's life greatly. Furthermore, the pile feeder is of a split structure, so that the structure is simpler, the transportation and the manufacture are convenient, and the cost is low.

Description

Pile feeder and pile feeder assembly

Technical Field

The invention belongs to the technical field of offshore wind turbines, and particularly relates to a pile feeder and a pile feeder assembly.

Background

In the offshore wind turbine foundation, the number of pile foundations is reduced, so that the cost can be reduced, namely, the cost can be reduced by using a single pile foundation. At present, in deepwater sites in Guangdong regions, the load is sometimes dozens of thousands of newton meters which is two times higher than the load of northern sea areas, according to the traditional design scheme of the L-shaped flange, due to the limitation of the diameter arrangement space of the flange, when the specification of the bolts is large, the requirement on strength cannot be met, under the condition, the outer diameter of the tower can be increased, the problem of strength is solved by increasing the number of the bolts, and a series of problems of manufacturing, processing, transporting and the like are brought about in turn.

At present, pile feeding devices are used for an L-shaped flange, but the pile feeding devices are generally formed into an integrated structure by a plurality of components in the directions of welding or fastener connection, and after multiple times of impact striking, welding or fastener fracture is easy to occur to cause damage, so how to improve the service life of the pile feeding devices is an important problem to be solved in the field.

Disclosure of Invention

It is an object of the present invention to provide a pile feeder and a pile feeder assembly.

Aiming at the above purpose, the invention provides the following technical scheme:

according to an aspect of the invention, a pile feeder is provided, comprising a pile feeder body and a first guide body, the pile feeder body being cylindrical and comprising a first deformation located at a lower portion of the pile feeder body, an inner wall of the first deformation gradually inclining inwardly from top to bottom; first direction body is the cylindric, and the cover is established send the inside of stake ware body, first direction body include with first deformation portion complex second deformation portion, wherein, send stake ware body with first direction body passes through first deformation portion with the cooperation of second deformation portion and relative joint, the effect mode of power between the two is pressure and holding power, has avoided local stress concentration, has improved the life who sends the stake ware greatly.

Preferably, the included angle between the inner wall of the first deformation part and the horizontal plane is 45-80 degrees.

According to an embodiment of the invention, the outer wall of the first deformation portion is gradually inclined outwards from top to bottom, the pile feeder further comprises a second guide body, the second guide body is cylindrical and is sleeved outside the pile feeder body, the second guide body comprises a third deformation portion matched with the first deformation portion, the pile feeder body and the second guide body are relatively clamped through matching of the first deformation portion and the third deformation portion, and the action mode of force between the first guide body and the second guide body is pressure and supporting force, so that local stress concentration is avoided, and the service life of the first guide body is greatly prolonged.

Preferably, the included angle between the outer wall of the first deformation part and the horizontal plane is 45-80 degrees.

According to another embodiment of the invention, the lower end of the body wall of the pile driver body is in the shape of an isosceles trapezoid protruding towards the middle from the inner wall and the outer wall respectively, and b is more than or equal to 4:3 and less than or equal to 3:1, wherein b is the length of the upper base of the isosceles trapezoid, and a is half of the difference between the lower base and the upper base of the isosceles trapezoid.

Specifically, the pile feeder satisfies 1/3 d/f 1/2, wherein d is the distance between the lower end of the pile feeder body and the lower end of the first guide body or the second guide body, and f is the height of the first guide body or the second guide body.

According to another aspect of the invention, there is provided a pile feeder assembly comprising a pile feeder and a lifting appliance as provided by the invention, the pile feeder body comprising at least one pair of grooves located above the first deformation, each groove being formed recessed from an inner wall towards an outer wall of the pile feeder; the spreader is insertable into the recess to lift the pile feeder.

Specifically, the hanger comprises a hanging beam and sliding blocks, wherein concave parts are formed at two ends of the hanging beam, and the sliding blocks are connected to the bottom of the concave parts and can selectively extend outwards from the concave parts to be clamped between the concave parts and the grooves.

Preferably, the upper surface of the groove is gradually inclined outwards from bottom to top, and an included angle beta between the upper surface of the groove and the horizontal plane is more than or equal to 15 degrees and less than or equal to 30 degrees.

Further, the size of the slider along the extending direction of the hanging beam is larger than the horizontal distance from the step edge of the upper surface of the groove to the bottom surface of the groove, so that the slider can be clamped between the groove and the concave part at the same time.

Specifically, the sliding block is an electromagnetic block which can be adsorbed on the bottom surface of the groove in a power-on state; in the power-off state, the electromagnetic block can be restored to the initial position thereof through the reset elastic piece.

Preferably, an insulating member is disposed between the slider and the bottom surface of the recess.

Further preferably, the hanger further comprises a locking pin, the hanging beam and the sliding block are provided with locking holes for the locking pin to be inserted into, and the locking pin can be simultaneously inserted into the locking holes of the hanging beam and the locking holes of the sliding block when the electromagnetic block is in an electrified state.

Preferably, the number of the locking holes is plural, and the plural locking holes are sequentially arranged along the extending direction of the hanging beam.

The pile driver and the pile driver assembly provided by the invention at least have the following beneficial effects: compared with the traditional mode of fixing the pile feeder and the pile driver into a whole through welding process or fastener connection, the pile feeder is of a split structure, is simpler in structure, convenient to transport and manufacture and low in cost. Furthermore, the pile feeder does not need welding or punching, ensures structural integrity, does not have the phenomena of local welding or fastener fracture and fatigue damage caused by stress concentration in the long-term use process, and prolongs the service life of the pile feeder.

Drawings

The above and/or other objects and advantages of the present invention will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a block diagram of a pile feeder assembly according to an embodiment of the present invention.

Fig. 2 is a partial cross-sectional view of the pile feeder of fig. 1.

Fig. 3 is a partially enlarged view of the inner J-turn structure of fig. 2.

Fig. 4 is a partially enlarged view of an inner structure of the circle I of fig. 1.

FIG. 5 is a block diagram of a pile feeder assembly according to another embodiment of the invention.

Fig. 6 is a partial cross-sectional view of the pile feeder of fig. 5.

Description of reference numerals:

10. a pile feeder; 20. A spreader;

201. a hanging beam; 202. A slider;

203. a restoring elastic member; 204. An insulating member;

205. a recessed portion; 206. A locking pin;

2011. a hanger lifting part; 110. A pile feeder body;

111. a binding face; 112. A first tapered cavity;

113. a tapered notch; 114. A second tapered cavity;

115. a tapered surface; 116. A groove;

120. a first guide body; 121. An inner ring hoisting part;

130. a second guide body; 131. An outer ring hoisting part;

30. a T-shaped flange; 40. An L-shaped flange.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

The definitions horizontal, vertical, up and down in this embodiment are described with reference to the use of the pile feeder assembly.

Referring to fig. 1 to 4, a pile feeder assembly according to an exemplary embodiment of the present invention comprises a pile feeder 10 and a spreader 20 for lifting the pile feeder 10, wherein the pile feeder 10 is substantially of a tubular structure, and the spreader 20 is connectable to the inside of the wall of the tubular structure for supporting the weight of the entire pile feeder 10 and for lifting the pile feeder 10.

As an embodiment of the invention, the pile feeder 10 comprises a pile feeder body 110 and a first guide body 120, the pile feeder body 110 being cylindrical and comprising a first deformation in a lower part of the pile feeder body 110, the inner wall of the first deformation being gradually inwardly inclined from top to bottom to form a first conical cavity 112. The first guiding body 120 is cylindrical and is sleeved inside the pile feeder body 110, the first guiding body 120 includes a second deformation portion matched with the first deformation portion, wherein the pile feeder body 110 and the first guiding body 120 are relatively clamped through the matching of the first deformation portion and the second deformation portion.

Specifically, the first guide body 120 is sleeved inside the pile feeder body 110 for guiding the pile feeder body 110, and the first guide body 120 and the pile feeder body 110 can move up and down relatively in the pile driving process.

Compared with the traditional mode of fixing the pile feeder and the pile feeder into a whole through welding process or fastener connection, the pile feeder disclosed by the invention does not need welding or punching, ensures the structural integrity, avoids local welding or fastener fracture and fatigue damage caused by stress concentration in the long-term use process, and prolongs the service life of the pile feeder 10. Besides, the pile feeder 10 is of a split structure, so that the structure is simpler, the transportation and the manufacturing are convenient, and the cost is low.

There is no rigid fixation between the first guide body 120 and the pile feeder body 110, and the first guide body 120 and the pile feeder body 110 are relatively clamped only by the cooperation of the first deformation portion and the second deformation portion, so that the first guide body 120 can move up and down relative to the pile feeder body 110 and cannot be separated from the lower part of the pile feeder body 110, wherein the action mode of the force between the pile feeder body 110 and the first guide body 120 is pressure and supporting force, so that local stress concentration is avoided, and the service life of the first guide body 120 is greatly prolonged. Specifically, the included angle between the inner wall of the first deformation part and the horizontal plane is 45-80 degrees. Preferably, the included angle may be 70 °.

During the piling process, the external hammering force will directly act on the upper end of the pile follower body 110, and then be transferred to the pile foundation through the flange, and as the flange moves down with the pile foundation, the pile follower body 110 also moves down together, and due to the principle of inertia, the first guide body 120 will remain in the original position during the piling action, and will later move down due to its own weight to closely adhere to the pile follower body 110 again.

The flanges may comprise flanges parallel to the axis of the pile foundation and longitudinal bodies extending substantially perpendicular to the axis of the pile foundation, typically T-flanges 40 and L-flanges 30. Preferably, d/e is equal to or greater than 3 and equal to or less than 5, d is the distance between the lower end of the pile feeder body 110 and the lower end of the first guide body 120, and e is the axial length of the flange plate of the flange. It is further preferred that the pile driver 10 satisfies 1/3 ≦ d/f ≦ 1/2, where f is the height of the first guide body 120.

The pile driver 10 provided by the embodiment is suitable for the L-shaped flange 40 and the T-shaped flange 30, and the bottom end surface of the pile driver body 110 is provided with an abutting surface 111 for abutting with the top surface of the flange, and preferably, the abutting surface 111 abuts with the top end surface of the longitudinal body.

The lower end of the body wall of the pile feeder body 110 is in an isosceles trapezoid shape protruding towards the middle from the inner wall and the outer wall respectively, b is more than or equal to 4:3, a is less than or equal to 3:1, wherein b is the length of the upper bottom of the isosceles trapezoid, and a is half of the difference between the lower bottom and the upper bottom of the isosceles trapezoid. Preferably, b: a ═ 4: 3. The lower end of the pile driver body 110 enables the abutting surface 111 of the pile driver body 110 to act only on the longitudinal body of the flange, thereby preventing the flange from being subjected to lateral force, prolonging the service life of the flange and improving the force transmission efficiency. Furthermore, the height of the isosceles trapezoid can be h, which satisfies h is more than 30mm, and the included angle between the waist of the isosceles trapezoid and the horizontal plane is alpha, and satisfies alpha is more than or equal to 15 degrees and less than or equal to 30 degrees. It will be appreciated that the waist on the left side of the isosceles trapezoid is formed as a tapered notch 113 and the waist on the right side of the isosceles trapezoid is formed as a second tapered cavity 114.

The top of the first guide body 120 is provided with an inner ring lifting part 121 for lifting, so as to be conveniently connected with an external crane.

Still further, the pile feeder body 110 comprises at least one pair of grooves 116 above the first deformation, each groove 116 being formed recessed from an inner wall towards an outer wall of the pile feeder 110 for receiving a spreader 20, so that the pile feeder 10 may be hoisted.

To further improve the stability of the coupling of the spreader 20 to the pile feeder body 110, the upper surface of the groove 116 extends in a direction perpendicular to the central axis of the pile feeder body 110 to form a right-angled step, or the upper surface of the groove 116 is gradually inclined outward from bottom to top to form a tapered step. Preferably, in the case that the step is a tapered step, the included angle beta between the upper surface and the horizontal plane satisfies the condition that beta is more than or equal to 15 degrees and less than or equal to 30 degrees.

The spreader 20 includes a hanging beam 201 and a slider 202, and a spreader lifting part 2011 for lifting is provided on the hanging beam 201. The suspension beam is formed with a concave portion 205 at both ends thereof, and the concave portion 205 is communicated with the outside, and the slider 202 is connected to the bottom of the concave portion 205 and can be selectively protruded outwardly from the concave portion 205 to be simultaneously caught between the concave portion 205 and the groove 116.

The lifting beam 201 comprises a beam body extending radially outwards with a recess 205 at the free end of the beam body, and a slider 202 is arranged in the recess 205 and can be selectively supported between the groove 116 and the recess 205 simultaneously for attaching the spreader 20 to the pile feeder body 110. Preferably, the upper surface of the left side of the slider 202 is the same shape as the upper surface of the groove 116, so that the upper surface of the slider 202 fits the upper surface of the groove 116 in the case where the slider 202 is caught in the groove 116 and the concave portion 205. Preferably, an included angle Φ between the upper surface of the left side of the slider 202 and the horizontal plane satisfies Φ ═ β, and Φ ≦ 15 ° or more and ≦ 30 °.

In particular, the slide 202 comprises an electromagnetic block, and the electromagnetic block is arranged towards the pile feeder body 110, the spreader 20 further comprises a return spring 203 connected between the slide 202 and the lifting beam 201, one end of the return spring 203 is fixed on the bottom surface of the recess 205, the other end of the return spring 203 is fixed on the end of the slide 202 facing away from the pile feeder body 110, wherein the slide 202 is arranged to: in the powered state, the electromagnetic block is adsorbed on the bottom surface of the groove 116; in the power-off state, the slider 202 is pulled back to the initial position by the return elastic member 203.

The slider 202 may be fully or partially retracted into the recess 205 and the dimension of the slider 202 in the extension direction of the beam body is larger than the horizontal distance from the step edge of the groove 116 to the bottom surface of the groove 116, so that in the energized state of the electromagnet block, the slider 202 may be simultaneously supported between the groove 116 and the recess 205.

As an embodiment, the lifting appliance 20 is installed at the beginning of the pile feeder 10, the electromagnetic block is not powered, under the action of the return elastic element 203, the sliding block 202 retracts into the concave portion 205, so that the lifting appliance 10 can smoothly enter the inner cavity of the pile feeder body 110 from the upper side of the pile feeder body 110 to the position of the groove 116, at this time, the electromagnetic block is powered on, one end of the electromagnetic block facing the pile feeder body 110 can be adsorbed on the bottom surface of the groove 116, so that the lifting appliance 10 is integrally clamped in the groove 116, and the pile feeder body 110 or the pile feeder 10 is integrally lifted.

As another preferred embodiment, in the state that the electromagnetic block is not powered, the sliding block 202 is partially retracted into the concave portion 205 under the action of the return elastic member 203, in this case, one end of the sliding block 202 facing the pile feeder body 110 may be located radially inside the step edge, so that the lifting appliance 10 can smoothly enter the inner cavity of the pile feeder body 110 from above the pile feeder body 110 to the position of the groove 116, and in the case that the end of the lifting appliance 10 is located radially inside the groove 116, the electromagnetic block is powered on, and one end of the electromagnetic block facing the pile feeder body 110 may be adsorbed on the bottom surface of the groove 116, so that the lifting appliance 10 is integrally clamped in the groove 116 to integrally lift the pile feeder body 110 or the pile feeder 10.

In the present embodiment, the sliding block 202 is an integrally formed electromagnetic block, but not limited thereto, for example, an insulating member 204 may be fixed to an end of the electromagnetic block facing away from the pile feeder body 110, so as to prevent the electromagnetic block from being adsorbed on the bottom surface of the concave portion 205 after being electrified, thereby further improving the safety of the pile feeder assembly. Further, the insulating member 204 may also be disposed on the bottom surface of the recess 205.

It is understood that the sliding block 202 may also be a non-electromagnetic block, and may be driven by a telescopic member, for example, a telescopic cylinder may be connected between the bottom surface of the concave portion 205 and the sliding block 202, one end of the telescopic cylinder may be fixed on the bottom surface of the concave portion 205, and the other end of the telescopic cylinder may be fixed on a side of the sliding block 202 facing the bottom surface of the concave portion 205, and the sliding block 202 is driven to be clamped in the groove 116 or extend out from the groove 116 by the telescopic cylinder.

Preferably, the hanging beam 201 may be a straight beam, a cross beam, or a beam body structure formed by a central support ring and a plurality of straight beams disposed on the central support ring and extending in a radial direction of the central support ring, all of which are within the scope of the present invention.

The lifting appliance 20 further comprises a locking pin 206, the lifting beam 201 and the sliding block 202 are both provided with locking holes for accommodating the locking pin 206, and the locking pin 206 is simultaneously inserted into the locking holes of the lifting beam 201 and the locking holes of the sliding block 202 in the power-on state of the electromagnetic block, so that the lifting appliance 20 stably lifts the pile feeder 10, potential safety hazards caused by resetting of the sliding block 202 after accidental power failure are prevented, and the safety of the pile feeder assembly is further improved. Preferably, the locking hole may be provided in plurality to be able to accommodate recesses 116 of different depths, so that the versatility of the spreader 20 may be improved.

Further, the L-shaped flange 40 is spaced apart from the outer sidewall of the first guide body 120, so that the first guide body 120 can prevent the L-shaped flange 40 from being scratched during the piling process. Preferably, the distance c between the first guide body 120 and the inner edge of the flange of the L-shaped flange 40 is 1-3 mm.

For the convenience of hoisting, a hoisting part 2011 is arranged on the hoisting beam 201, and an inner ring hoisting part 121 is arranged at the top of the first guide body 120.

Further, the pile feeder 10 further includes a second guide body 130, an outer wall of the first deformation portion is gradually inclined outward from top to bottom to form a tapered surface 115, the second guide body 130 is cylindrical and is sleeved outside the pile feeder body 110, the second guide body 130 includes a third deformation portion engaged with the first deformation portion, and the pile feeder body 110 and the second guide body 130 are relatively engaged by engagement of the first deformation portion and the third deformation portion. The second guiding body 130 increases the accuracy and stability of the guiding of the pile feeder body 110 with a better centering.

The first guide body 120 is arranged opposite to the second guide body 130 and is arranged on the inner side wall and the outer side wall of the lower part of the pile feeder body 110, respectively, forming: the first guide body 120 and the second guide body 130 are each able to move up and down relative to the pile feeder body 110 and are neither able to disengage from the lower part of the pile feeder body 110. The present embodiment provides a pile feeder 10 adapted for use with a T-flange 30. The first guide body 120 and the second guide body 130 respectively guide both sides of the T-shaped flange 30. In this embodiment, the angle between the outer wall of the first deformation and the horizontal plane may be between 45 ° and 80 °. Preferably, the included angle is 70 °. For the convenience of lifting, the top of the second guide body 130 is provided with an outer ring lifting part 131. T type flange has more bolt arrangement space than L type flange to can increase the quantity of bolt under the unchangeable condition of longitudinal body diameter, just also satisfy the high load demand.

The impact inertia principle of the pile feeder provided by the invention is as follows: in the piling process, the external impact force can be directly transmitted to the middle part of the flange, namely the longitudinal body, and then transmitted to the wall thickness direction of the pile foundation to the bottom of the pile foundation, the pile feeder is formed by a first guide body 120, a second guide body 130 and a pile feeder body 110, which are detachably connected by contact surfaces, without rigid fixation, when an external impact force impacts the flange, the flange has a certain penetration, due to the principle of inertia, the first guide body 120 and the second guide body 130 will be temporarily stationary until the pile driver body 110 moves down to the next pile driving action, will be stationary, and will later fall down to be attached to the attaching surface of the pile driver body 110 again due to the self-gravity, and the process is repeated, therefore, the first guide body 120 and the second guide body 130 are prevented from transmitting the guide impact force to the tower flange in the piling process, and the corrosion resistance and the safety of the tower flange are improved.

The described features, structures, or characteristics of the invention may be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

Claims

1. Pile feeder, characterized in that the pile feeder (10) comprises:

a pile feeder body (110), the pile feeder body (110) being cylindrical and including a first deformation portion at a lower portion of the pile feeder body (110), an inner wall of the first deformation portion being gradually inclined inward from top to bottom;

a first guide body (120) which is cylindrical and is sleeved inside the pile feeder body (110), wherein the first guide body (120) comprises a second deformation part matched with the first deformation part,

wherein the pile feeder body (110) and the first guide body (120) are relatively clamped by the cooperation of the first deformation and the second deformation.

2. The pile driver of claim 1, wherein the angle between the inner wall of the first deformation and the horizontal is between 45 ° and 80 °.

3. Pile feeder according to claim 2, characterized in that the outer wall of the first deformation tapers outwardly from top to bottom, that the pile feeder (10) further comprises a second guide body (130), that the second guide body (130) is cylindrical and fits over the outside of the pile feeder body (110), that the second guide body (130) comprises a third deformation cooperating with the first deformation, and that the pile feeder body (110) and the second guide body (130) are relatively snap-fitted by cooperation of the first and third deformations.

4. The pile driver of claim 3, wherein the outer wall of the first deformation is angled between 45 ° and 80 ° from horizontal.

5. Pile feeder according to claim 1, characterised in that the lower end of the body wall of the pile feeder body (110) is in the form of an isosceles trapezium protruding medially from the inner and outer wall, respectively, satisfying 4: 3. ltoreq. b: a. ltoreq.3: 1, where b is the length of the upper base of the isosceles trapezium and a is half the difference between the lower and upper bases of the isosceles trapezium.

6. Pile feeder according to claim 3, characterized in that the pile feeder (10) fulfils 1/3 ≦ d/f ≦ 1/2, where d is the distance between the lower end of the pile feeder body (110) and the lower end of the first guide body (120) or the second guide body (130), and f is the height of the first guide body (120) or the second guide body (130).

7. A pile feeder assembly, characterized in that the pile feeder assembly comprises:

pile feeder (10) according to any one of claims 1-6, the pile feeder body (110) comprising at least one pair of grooves (116) above the first deformation, each groove (116) being formed recessed from an inner wall towards an outer wall of the pile feeder (110);

a spreader (20), the spreader (20) being insertable into the recess (116) to lift the pile feeder (10).

8. Pile feeder assembly according to claim 7, wherein the spreader (20) comprises:

a hanging beam (201) with concave parts (205) formed at both ends thereof,

a slider (202), the slider (202) being connected to the bottom of the recess (205) and being capable of selectively protruding outward from the recess (205) to be simultaneously caught between the recess (205) and the groove (116).

9. Pile feeder assembly according to claim 8, characterized in that the upper surface of the recess (116) is inclined gradually outwards from bottom to top and at an angle β of between 15 ° β 30 ° to the horizontal, the upper surface of the slide (202) matching the upper surface of the recess (116).

10. Pile feeder assembly according to claim 8, characterized in that the dimension of the slide (202) in the extension direction of the suspension beam (201) is larger than the horizontal distance of the step edge of the upper surface of the groove (116) to the bottom surface of the groove (116).

11. The pile feeder assembly according to claim 8, wherein the slide (202) is an electromagnetic block that, in the energized state, is capable of attracting to the bottom surface of the recess (116); in the power-off state, the electromagnetic block can be restored to its initial position by a reset elastic member (203).

12. Pile feeder assembly according to claim 10, characterized in that an insulating member (204) is arranged between the slide (202) and the bottom surface of the recess (205).

13. Pile feeder assembly according to claim 11, characterized in that the spreader (20) further comprises a locking pin (206), the lifting beam (201) and the slide block (202) each being provided with a locking hole into which the locking pin (206) is inserted, the locking pin (206) being inserted into the locking holes of the lifting beam (201) and the locking holes of the slide block (202) in the energized state of the electromagnet block.

14. Pile feeder assembly according to claim 13, wherein the locking hole is plural and the plural locking holes are arranged in series in the extension direction of the suspension beam (201).