CN111501816B - Connecting piece for anchor bolt replacement, anchor bolt system and anchor bolt replacement method - Google Patents

Abstract

The invention discloses a connecting piece for replacing an anchor bolt, an anchor bolt system and a method for replacing the anchor bolt, and relates to the field of wind driven generators, wherein the connecting piece for replacing the anchor bolt comprises a nut fixing connecting piece and an anchor bolt fixing connecting piece; the nut fixing connecting piece is annular, a plurality of circles of mounting holes are distributed on the nut fixing connecting piece, and the mounting holes are arranged at equal intervals; the mounting hole is capable of cooperating with the nut to secure the nut against rotational movement in the axial direction. The connecting piece is convenient to install and high in reliability, and can meet the requirement of anchor bolt replacement; the invention adopts a safe and simple replacing method to replace the anchor bolt.

Description

Connecting piece for anchor bolt replacement, anchor bolt system and anchor bolt replacement method

Technical Field

The invention relates to the field of wind driven generators, in particular to a connecting piece for replacing an anchor bolt, an anchor bolt system and an anchor bolt replacing method.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The inventor finds that the height of the hub of the wind generating set is more than 90 meters at present, the load of the wind turbine foundation is large, and most of the wind generating sets are connected with the foundation in an anchor bolt cage structure mode. The anchor bolt cage is of great importance to the wind generating set, and the failure and the fracture of one anchor bolt can cause the scrapping of the whole wind generating set, thereby causing serious property loss. Improving the stock intensity can reduce the stock and become invalid, but also can't guarantee 100% that the stock can not become invalid yet, but also can increase cost by a wide margin. It is therefore important to be able to remove the bolt in the event of a failure and install a new bolt.

The current removable crab-bolt that is used for aerogenerator of contrast has a scheme at present, adopts the welding form to fix the nut on anchor slab down, bores through self tapping screw and takes out cracked crab-bolt. The method has the disadvantages that firstly, the mechanical property of the anchor plate can be influenced when the nut is welded on the anchor plate, secondly, the welding property of the nut is poor, the welding part of the nut is easy to break, and the replaceable reliability is influenced, and thirdly, when the broken anchor bolt is drilled through the self-tapping screw, the screw drill is easy to damage the foundation, and larger loss is caused.

Disclosure of Invention

Aiming at the defect that the replacement of an anchor rod of a wind driven generator is inconvenient after the anchor rod fails in the prior art, the invention aims to provide a connecting piece for replacing an anchor bolt, an anchor bolt system and a method for replacing the anchor bolt, wherein the connecting piece which is convenient to install and high in reliability is adopted, so that the requirement for replacing the anchor bolt can be met; the anchor bolt is replaced by adopting a safe and simple replacing method.

In order to achieve the purpose, the invention is realized by the following technical scheme:

in a first aspect, the invention provides a connecting piece for replacing anchor bolts, which comprises a nut fixing connecting piece and an anchor bolt fixing connecting piece, wherein the nut fixing connecting piece is used for connecting a nut;

the nut fixing connecting piece is annular, a plurality of circles of mounting holes are distributed on the nut fixing connecting piece, and the mounting holes are arranged at equal intervals; the mounting hole is capable of cooperating with the nut to secure the nut against rotational movement in the axial direction.

As a further technical scheme, the anchor bolt fixing and connecting piece comprises an inner connecting rod and an outer locking sleeve, wherein the inner connecting rod is used for connecting a broken anchor bolt, and the outer locking sleeve is used for clamping the inner connecting rod and the broken anchor bolt; when the internal connecting rod and the external locking sleeve are used simultaneously, the internal connecting rod is inserted into the anchor rod, and the external connecting rod is sleeved outside the anchor rod; the inner connecting rod and the outer locking sleeve can be in threaded connection.

In a second aspect, the invention provides an anchor bolt system, which comprises an anchor bolt component, an anchor bolt fixing and connecting piece and the nut fixing and connecting piece in the first aspect, wherein the anchor bolt component comprises an anchor bolt, a nut, a gasket, an upper anchor plate and a lower anchor plate, the upper anchor plate and the lower anchor plate are both annular plates, and the upper anchor plate and the lower anchor plate are both provided with a plurality of circles of anchor bolt holes; the anchor bolt penetrates through the upper anchor plate and the lower anchor plate; the lower anchor plate and the nut fixing connecting piece can be fixedly connected, and a gasket is arranged between one side of the bolt pier head and the lower anchor plate;

and the anchor bolt component and the nut fixed connecting piece are embedded into the fan foundation, and the anchor bolt head on the upper part of the upper anchor plate is exposed and used for fixing the lower flange of the tower cylinder of the wind driven generator.

In a third aspect, the present invention provides an anchor bolt replacing method using the connecting member for anchor bolt replacement according to the first aspect, comprising the steps of:

directly taking out the broken upper anchor bolt;

installing an anchor bolt fixing connecting piece, and connecting the broken lower section anchor bolt to the anchor bolt fixing connecting piece;

installing a nut fixing connecting piece, rotating an anchor bolt fixing connecting piece fixedly connected with the broken lower-section anchor bolt, and screwing out the broken lower-section anchor bolt;

a new anchor rod is inserted from the anchor hole at the break.

The beneficial effects of the above-mentioned embodiment of the present invention are as follows:

1. the technical scheme provided by the invention can meet the requirement of replacing the anchor bolt and realize the replacement of the broken anchor bolt; through nut fixed connection spare, can avoid the welding, guarantee under the condition that does not cause the damage to crab-bolt cage structure, realize that the nut is fixed, in crab-bolt cage working process, nut fixed connection spare all can use at any time.

2. In the technical scheme provided by the invention, the size design of the nut fixing piece meets the mechanical property requirements of the nut and the anchor plate, the reliability of the nut during replacement can be ensured,

3. according to the technical scheme provided by the invention, the broken anchor bolt is taken out by using the anchor bolt fixing and connecting piece, the inside and the outside of the broken anchor bolt can be clamped by the anchor bolt fixing and connecting piece, the inside and the outside of the anchor bolt fixing and connecting piece can be connected through threads, so that the pulling force is provided on the inside and the outside of the broken anchor bolt, and the broken anchor bolt is taken out smoothly.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

Figure 1 is a schematic view of a replaceable anchor system according to one or more embodiments of the present invention,

figure 2 is a schematic view of a nut securing attachment in accordance with one or more embodiments of the invention,

figure 3 is a cross-sectional view of a nut retaining connection according to one or more embodiments of the present invention,

figure 4 is a schematic view of an anchor-fixing connector of one or more embodiments of the present invention securing a fractured anchor,

figure 5 is a schematic view of the internal connecting rod structure of the anchor fixing link in accordance with one or more embodiments of the present invention,

figure 6 is a schematic view of an anchor buckle configuration of an anchor-retaining connector according to one or more embodiments of the present invention,

figure 7 is a schematic view of an outer locking sleeve of an anchor retaining connection according to one or more embodiments of the present invention.

In the figure, 100, a nut fixes a connecting piece; 102. an inner ring hexagonal hole; 101. an outer ring hexagonal hole; 103. the outer diameter of the annular plate; 104. the inner diameter of the annular plate; 105. an inner reference circle; 106. an outer reference circle; 107. the thickness of the connecting piece is fixed by the nut; 108. chamfering; 109. a fixing hole; 200. A bolt and a nut; 300. an anchor bolt; 400. an anchor plate is arranged; 500. a lower anchor plate; 601. a nut; 602. a gasket; 603. a snap ring; 700. chamfering the anchor bolt by 60 degrees; 800. fixing the connecting piece by using an anchor bolt; 810. an inner connecting rod; 811. a hexagonal pier head; 812. an inner hollow rod; 813. An anchor bolt buckle; 815. a thread; 816. a probe; 817. granular protrusions; 820. an outer locking sleeve; 821. a hexagonal outward raised head; 822. a hollow sleeve; 823. a locking head; 824. a thread; 825. is convex inwards.

The spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

The terms "mounted", "connected", "fixed", and the like in the present invention are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.

As introduced by the background art, the invention aims to provide a connecting piece, a system and a method which are safe, reliable and simple to operate, aiming at the defect that the anchor rod of the wind driven generator in the prior art is inconvenient to replace after being out of work. The connecting piece which is convenient to install and high in reliability is adopted, so that the requirement for replacing the anchor bolt can be met; the anchor bolt replacement is achieved by a safe and easy-to-operate replacement method, which will now be described with reference to the accompanying drawings and examples.

Example 1

Referring to fig. 1 and 5, as a typical embodiment of the present invention, a connector for anchor bolt connection includes a nut fixing connector 100, the nut fixing connector 100 is in a ring plate structure, two rings of hexagonal holes, i.e., an inner ring 102 and an outer ring 101, are formed on the ring plate, an inner division circle 105 and an outer division circle 106 of the hexagonal holes are identical to a reference circle of anchor bolt holes of a lower anchor plate 500, and the number of the hexagonal holes is the same as that of the anchor bolt holes of the lower anchor plate 500.

The hexagonal hole on the nut fixing and connecting member 100 in this embodiment is formed according to the hole of the nut 601 on the anchor bolt, the opposite side dimension of the hexagonal hole is 1-3mm larger than the opposite side dimension of the nut 601, and the hexagonal hole on the nut fixing and connecting member 100 limits the rotation of the nut 601. The opposite side dimension of the hexagonal hole is 60 ° times of the side length of the hexagon, and in actual calculation, the value of tan60 ° can be 1.732.

It will be appreciated that in other embodiments, when the nut block of the anchor is profiled, the hexagonal bore shape is modified according to the shape of the anchor block.

One side of the hexagonal hole on the nut fixing and connecting piece 100, which is close to the lower anchor plate 500, is chamfered, and the size of the chamfer 108 is not smaller than the thickness of the gasket 602, so that the hexagonal hole is ensured not to interfere with the gasket 602.

The hexagonal hole of the nut fixed connecting piece 100 is provided with a snap ring 603, the top edge of the snap ring 603 is slightly smaller than the chamfered edge of the hexagonal hole, the snap ring can be arranged on the nut fixed connecting piece 100, and the bottom edge of the snap ring is slightly smaller than the edge of the nut 601, so that the movement of the nut 601 in the vertical direction can be limited.

The nut fixing connecting piece is an annular plate, and the distance between the inner diameter of the annular plate and the reference circle of the anchor bolt hole of the inner ring is more than 1.5 times of the diameter of the anchor bolt hole and less than the inner diameter of the lower anchor plate; the outer diameter of the annular plate is more than 1.5 times of the diameter of the anchor bolt hole from the reference circle of the anchor bolt hole of the inner ring and less than the inner diameter of the lower anchor plate.

The closest distance between the inner diameter 104 of the nut fixed connecting piece 100 and the anchor bolt hole reference circle of the inner ring 102 is more than 1.5 times of the diameter of the anchor bolt hole and is less than the inner diameter of the lower anchor plate; the distance between the outer diameter 103 of the annular plate and the reference circle of the anchor bolt hole of the inner ring is more than 1.5 times of the diameter of the anchor bolt hole and less than the outer diameter of the lower anchor plate.

Referring to fig. 3, the thickness 107 of the nut fixing and connecting member in this embodiment is not less than 10mm, and the strength is not less than Q235 grade by using carbon steel material.

The nut fixing and connecting piece 100 is provided with a fixing hole 109 and is fixed below the lower anchor plate 500 through a bolt and a nut 200; the fixing hole 109 is opened corresponding to the position of the lower anchor plate 500.

The diameter of the fixing hole 109 on the nut fixing connector 100 is not less than 20mm and not more than 30 mm. The number is not less than 4, not more than 12, and the uniform distribution is realized.

The fixing holes 109 on the nut fixing connector 100 correspond to the fixing holes on the lower anchor plate 500, and the nut fixing connector 100 and the lower anchor plate 500 are fixed through the bolt and the nut 200, so that the nut fixing connector 100 and the anchor bolt assembly are connected into a whole after the anchor bolt assembly is installed.

Referring to fig. 4, the present embodiment further includes an inner connecting rod 810 and an outer locking sleeve 820, the inner connecting rod 810 is used for connecting a broken anchor bolt, the outer locking sleeve 820 is used for clamping the connected inner connecting rod 810 and the broken anchor bolt, and the inner connecting rod 810 and the outer locking sleeve 820 are installed together and are made of carbon steel.

Referring to fig. 5, the inner connecting rod 810 is an inner hollow rod 812 with a hexagonal pier 811 at one end for rotation of tools such as wrenches and pipe tongs; the other end is provided with an anchor bolt buckle 813 used for connecting an anchor bolt.

Referring to fig. 6, the anchor bolt 813 of the present embodiment has three probes 816, and in other embodiments, the anchor bolt 813 may have more than three probes 816, and the probes 816 are integrated with the inner hollow rod 812 and uniformly distributed. The outer surface of the probe 816 is flush with the outer surface of the inner hollow shaft 812 and the inner surface of the probe 816 has pointed granular protrusions 817 for increasing friction.

Wherein the outer surface of the anchor button 813 has threads 815, the threads 815 begin at the junction of the probe 816 and the inner hollow shaft 812, and extend a distance along the inner connecting shaft axis toward the abutment 811.

Referring to fig. 7, the external locking sleeve 820 is a hollow sleeve 822 with a hexagonal outward nose 821 at one end for rotation of a wrench, a pipe wrench, or other tools; the other end is a locking head 823 for locking the anchor bolt 813.

The inner end of the locking head 823 protrudes inwards 825, the height of the protrusion gradually decreases along the axis until the connecting position of the locking head 823 and the hollow sleeve 822 is flush, the outer surface of the locking head 823 and the outer surface of the hollow sleeve 822 are flush, and the section of the half longitudinal section of the locking head 823 is right trapezoid when viewed from the section of the locking head.

Wherein, the inner surface of the locking head 823 is provided with a thread 824, and the thread 824 starts at the convex flush part of the locking head 823 and is arranged at a distance to the other side along the axis of the hollow sleeve 822, and can be matched with the thread 815 on the outer surface of the anchor bolt fastener 813 for use.

The inner connecting rod 810 and the outer locking sleeve 820 are installed together and then used, and the inner connecting rod 810 penetrates into the outer locking sleeve 820. The inner diameter of the inner connecting rod 810 is such that it can be inserted into the breakdown anchor 830, but not more than 5mm larger than the diameter of the breakdown anchor 830; the inner connecting rod 810 has an outer diameter sufficient to be inserted into the outer locking sleeve 820.

The inner connecting rod 810 and the outer locking sleeve 820 have a gap, but the threaded fit and installation of the locking head 823 and the anchor bolt 813 can be satisfied. After the internal connecting rod 810 and the external locking sleeve 820 are installed, the hexagonal pier head 811 end of the internal connecting rod 810 is longer than the external locking sleeve 820, the anchor bolt buckle 813 of the internal connecting rod 810 is shorter than the external locking sleeve 820, but after the external locking sleeve 820 is rotated outwards, the locking head 823 can extrude the anchor bolt buckle 813, so that the probe 816 is locked on the fracture anchor bolt 830.

The length of the inner connecting rod 810 and the outer locking sleeve 820 after being installed can meet the requirement that the fixed fracture anchor bolt 830 is exposed outside the foundation, and the hexagonal pier head 811 and the raised head 821 can be operated by using a tool such as a wrench, a pipe wrench and the like.

It should be understood that, assuming that the main structure of the nut-fixing connector is a circular ring, the centripetal side is an inner side, and the centrifugal side is an outer side, and assuming that the main structure of the anchor bolt-fixing connector is a tubular structure, the centripetal side is an inner side, and the centrifugal side is an outer side, based on the basic orientation, the inner side and the outer side in the present embodiment are accurately defined.

It should be understood that the upper and lower anchor plates are of an up-down configuration and are used as an up-down orientation reference frame in this embodiment.

Example 2

Referring to fig. 1 and 4, as an exemplary embodiment, the present embodiment provides an anchor bolt system convenient for replacement, which includes an anchor bolt assembly, an anchor bolt fixing connector 800, a nut fixing connector 100, a bolt and nut wrench 200 and a pipe wrench; the anchor bolt component comprises an anchor bolt 300, an anchor bolt nut 601 and a gasket 602, an upper anchor plate 400 and a lower anchor plate 500, wherein the upper anchor plate 400 and the lower anchor plate 500 are annular plates and are provided with two circles of anchor bolt holes, and the two circles of anchor bolt holes are symmetrically distributed by using the center line of the inner diameter and the outer diameter of the anchor plate. The lower anchor plate 500 is provided with a support hole for connecting a lower anchor plate supporting member and a fixing hole for connecting the nut fixing connector 100; one end of the anchor bolt 300 is connected with the upper anchor plate 400, the upper surface of the upper anchor plate 400 is fixed through an anchor bolt nut 601 and a gasket 602, the other end of the anchor bolt is connected with the lower anchor plate 500, and the lower surface of the lower anchor plate 500 is fixed through the anchor bolt nut 601 and the gasket 602. The lower anchor plate 500 and the nut fixing-connecting member 100 are fixed by the bolt and nut 200 through the fixing hole 109, the anchor bolt 300 passes through the nut fixing-connecting member 100, and the anchor bolt nut 601 and the washer 602 are in the hexagonal hole of the nut fixing-connecting member 100.

The anchor bolt assembly and the fixed nut fixing and connecting piece 100 are embedded into the wind turbine foundation, the lower anchor plate 500 is arranged below the wind turbine foundation, the upper anchor plate 400 is arranged above the wind turbine foundation, and the anchor bolt head on the upper portion of the upper anchor plate 400 is exposed and used for fixing the lower flange of the tower of the wind turbine.

Hexagonal hole on nut fixed connection spare 100 cooperates with crab-bolt nut 601, gasket 602, and after follow-up crab-bolt 300 broke, through fixed crab-bolt nut 601 of nut fixed connection spare 100, gasket 602, through the fixed crab-bolt 830 that breaks of crab-bolt fixed connection spare 800, then take out fracture crab-bolt 830 through instruments such as spanner, breakout tongs, prevent that nut 601 from dropping through snap ring 603, insert new crab-bolt 300, through the fixed crab-bolt nut 601 of nut fixed connection spare 100, gasket 602 installation. The anchor-fixing connector 800 includes the features of claims 5-12.

The anchor bolt 300 is provided with a 60-degree chamfer 700 at the insertion end portion, and can be inserted into the bolt hole of the lower anchor plate 500, the anchor bolt nut 601 and the gasket 602 during replacement.

Example 3

As an exemplary embodiment, the present embodiment discloses a method for replacing an anchor bolt, which is used for disposing when a replaceable anchor bolt assembly embedded in a foundation and installed detects anchor bolt breakage, and comprises the following steps:

1) directly taking out the broken upper anchor bolt;

2) installing an anchor bolt fixing connecting piece 800, inserting the broken anchor bolt 830 into an anchor bolt buckle 813 of the internal connecting rod 810 in the anchor bolt hole extending into the broken anchor bolt hole, fastening by rotating the external locking sleeve 820, and fixing the broken lower-section anchor bolt 830 after applying a certain pretightening force;

3) since the anchor bolt nut 601 and the washer 602 of the lower anchor bolt 830 below the lower anchor plate 500 are fixed by the nut fixing-connecting member 100, the anchor bolt fixing-connecting member 800 to which the broken lower anchor bolt 830 has been fixed is rotated, and the broken lower anchor bolt 830 is unscrewed, thereby taking out all the broken anchor bolts, at this time, the nut 601 is fixed in the vertical direction by the snap ring 603;

4) the new anchor bolt 300 is inserted into the anchor bolt hole at the fracture position, and since the anchor bolt nut 601 and the washer 602 under the lower anchor plate 500 are fixed by the nut fixing-connecting member 100, specifically, the new anchor bolt can be screwed into the anchor bolt hole by rotating the new anchor bolt upward by a tool such as a wrench or a pipe wrench.

5) And after the required depth is reached, a stretching method is adopted to install a new anchor bolt, and the replacement of the replaceable anchor bolt component is completed.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A connecting piece for replacing anchor bolts is characterized by comprising a nut fixing connecting piece and an anchor bolt fixing connecting piece, wherein the nut fixing connecting piece is used for connecting nuts, the nut fixing connecting piece can also be connected to an anchor plate, the anchor bolt fixing connecting piece is used for connecting anchor bolts, the nuts are in threaded connection with the anchor bolts, and the anchor bolts are connected to the anchor plate;

the nut fixing connecting piece is annular, a plurality of circles of mounting holes are distributed on the nut fixing connecting piece, and the mounting holes are arranged at equal intervals; the mounting hole can be matched with the nut to fix the nut to rotate along the axial direction; the mounting hole is a hexagonal hole, and the size of the opposite side of the hexagonal hole is 1-3mm larger than that of the hexagonal opposite side of the nut; the edge of the hexagonal hole close to one surface of the anchor plate is provided with a chamfer;

the anchor bolt fixing and connecting piece comprises an inner connecting rod and an outer locking sleeve, the inner connecting rod is used for connecting a broken anchor bolt, and the outer locking sleeve is used for clamping the inner connecting rod and the broken anchor bolt; when the internal connecting rod and the external locking sleeve are used simultaneously, the anchor bolt is inserted into the internal connecting rod, and the external locking sleeve is sleeved outside the internal connecting rod; the inner connecting rod and the outer locking sleeve can be in threaded connection.

2. The connecting member for anchor bolt replacement as set forth in claim 1, wherein the anchor plate is provided with inner and outer rings of anchor bolt holes for connecting the anchor bolts, and the distance between the inner diameter of the nut fixing connecting member and the reference circle of the inner ring of anchor bolt holes is greater than 1.5 times the diameter of the anchor bolt holes and smaller than the inner diameter of the anchor plate tightly adhered to the nut fixing connecting member; the distance between the outer diameter of the nut fixed connecting piece and the reference circle of the outer ring anchor bolt hole is larger than 1.5 times of the diameter of the anchor bolt hole and smaller than the outer diameter of the anchor plate tightly attached to the nut fixed connecting piece.

3. The connector for anchor bolt replacement as set forth in claim 1, wherein said inner connecting rod is an inner hollow rod having a hexagonal pier head at one end and an anchor stud at the other end.

4. The connector for anchor bolt replacement as set forth in claim 3, wherein said anchor stud includes a plurality of probes, the outer surfaces of the probes being flush with the outer surface of the inner connecting rod, the inner surfaces of the probes having granular projections with tips; the outer surface of the anchor bolt buckle is provided with threads, the threads start from the joint of the probe and the internal connecting rod and extend towards the pier head side along the axis of the internal connecting rod.

5. The connector for anchor bolt replacement as set forth in claim 3, wherein said outer locking sleeve is a hollow sleeve with a hexagonal outwardly projecting nose at one end; the other end is a locking head used for locking the anchor bolt buckle.

6. The connector for anchor bolt replacement as set forth in claim 5, wherein said locking head is inwardly convex; the height of the bulge is reduced along the axis until the joint of the locking head and the hollow sleeve is flush with the surface of the hollow sleeve; the inner surface of the locking head is also provided with threads, and the threads start at the raised flush position and extend to the other end along the axis of the hollow sleeve.

7. An anchor bolt system, which is characterized by comprising an anchor bolt assembly and the connecting piece for replacing the anchor bolt as claimed in any one of claims 1 to 2, wherein the anchor bolt assembly comprises an anchor bolt, a nut, a gasket, an upper anchor plate and a lower anchor plate, the upper anchor plate and the lower anchor plate are both annular plates, and the upper anchor plate and the lower anchor plate are both provided with a plurality of rings of anchor bolt holes; the anchor bolt penetrates through the upper anchor plate and the lower anchor plate; the lower anchor plate and the nut fixing and connecting piece can be fixedly connected, and a gasket is arranged between one side of the pier head of the anchor bolt and the lower anchor plate;

and the anchor bolt component and the nut fixed connecting piece are embedded into the fan foundation, and the anchor bolt head on the upper part of the upper anchor plate is exposed and used for fixing the lower flange of the tower cylinder of the wind driven generator.

8. An anchor bolt replacing method using the connecting member for anchor bolt replacement according to any one of claims 1 to 6, comprising the steps of:

directly taking out the broken upper anchor bolt;

installing an anchor bolt fixing connecting piece, and connecting the broken lower section anchor bolt to the anchor bolt fixing connecting piece;

installing a nut fixing connecting piece, rotating an anchor bolt fixing connecting piece fixedly connected with the broken lower-section anchor bolt, and screwing out the broken lower-section anchor bolt;

a new anchor is inserted from the anchor hole at the break.

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