Method for removing fractured bolts in installation process of wind generating set

Abstract

The invention relates to the technical field of machine manufacturing, in particular to a method for removing a fractured bolt in the installation process of a wind generating set, which comprises the following steps of: 1, finding and marking the position of the fractured bolt; secondly, the periphery of the fractured bolt is cleaned; thirdly, a thread taking tool is used for being fixed to the head of the fractured bolt; and fourthly, torque and outward axial tension are applied to the thread taking tool, so that the fractured bolt is gradually loosened till complete separation is achieved. The method has the beneficial effects that through the innovative solution provided by the invention, the broken bolt can be effectively and safely removed, the possibility of thread damage is reduced, and the mounting efficiency and safety of the wind generating set are improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical manufacturing, and in particular to a method for removing broken bolts during the installation process of a wind turbine generator set. Background Art

[0002] During the installation of wind turbines, bolts often break due to the influence of harsh environmental factors such as strong winds and vibrations, as well as possible manufacturing defects or improper installation. This will not only seriously affect the installation progress, but may also lead to structural instability, threatening the safety of equipment and personnel. The commonly used method in the prior art is to clamp the broken bolts with a clamp and then remove the broken bolts by rotating them. This method of removing broken bolts is not only cumbersome to operate, but also often takes a long time, especially when facing special designs such as double-headed blade bolts. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method for removing broken bolts during the installation process of a wind turbine generator set, so as to solve the above-mentioned problems existing in the prior art.

[0004] The technical solution of the present invention to solve the above technical problem is as follows: A method for removing broken bolts during the installation process of a wind turbine generator set comprises the following steps:

[0005] Step 1: Find and mark the location of the broken bolt;

[0006] Step 2: Clean the area around the broken bolt;

[0007] Step 3: Use a wire extraction tool to fix the head of the broken bolt;

[0008] Step 4: Apply torque and outward axial pulling force to the wire extraction tool to gradually loosen the broken bolt until it is completely detached.

[0009] Based on the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, in step three, when there is no gap between the broken bolt and the bolt hole, a hole is drilled at the top center of the broken bolt using a drilling tool, and one end of the wire extraction tool is fixedly inserted into the hole.

[0011] The beneficial effect of adopting the above further scheme is: when there is no gap between the broken bolt and the bolt hole, the wire extraction tool is fixedly connected to the hole on the top of the broken bolt. By pulling out and rotating the wire extraction tool, a point of action can be provided for removing the broken bolt, making it convenient to remove the broken bolt.

[0012] Furthermore, the wire extraction tool is a pull rod with a cylindrical end, and the cylindrical end of the pull rod is inserted into the hole and fixedly connected with the hole by interference fit.

[0013] The beneficial effect of adopting the above further scheme is that the pull rod and the hole are fixedly connected by interference fit, and the pull rod is inserted into the hole by knocking to achieve a fixed connection between the pull rod and the broken bolt, thereby ensuring the strength of the fixed connection and facilitating the removal of the broken bolt.

[0014] Furthermore, the wire extraction tool is an expansion screw rod.

[0015] The beneficial effect of adopting the above further scheme is that the wire extraction tool adopts an expansion screw rod. After the expansion screw rod is inserted into the hole, the expansion screw rod is activated so that the expansion screw rod is tightly fixed in the hole, which facilitates the removal of the broken bolt.

[0016] Furthermore, in step three, when there is a gap between the broken bolt and the bolt hole, the wire extraction tool is a wire extraction sleeve, and the wire extraction sleeve is sleeved on the top of the broken bolt so that the interior of the wire extraction sleeve is in close contact with the broken bolt.

[0017] The beneficial effect of adopting the above further scheme is: the thread extraction sleeve is fixedly sleeved on the broken bolt to avoid drilling the broken bolt and avoid further damage to the broken bolt.

[0018] Furthermore, the wire removal sleeve includes a first cylindrical sleeve body, a first bolt head is fixedly provided at one end of the first sleeve body, a first wire removal groove is provided at the other end of the first sleeve body, a plurality of first ribs are arranged in the first wire removal groove at circumferential intervals along the first wire removal groove, the length direction of the first rib extends from the notch of the first wire removal groove to the bottom of the groove, the inner wall of the first rib gradually extends from the notch of the first wire removal groove to the bottom of the groove toward the center of the first wire removal groove, and when the first sleeve body is inserted into the broken bolt, the first rib abuts against the outer wall of the broken bolt.

[0019] The beneficial effect of adopting the above-mentioned further scheme is that the inner wall of the first convex rib arranged in the first wire taking groove gradually extends from the groove mouth of the first wire taking groove to the groove bottom toward the center direction of the first wire taking groove, so that the deeper the insertion depth of the first sleeve body is, the greater the connection strength between the broken bolt and the first wire taking groove, and the more stable the connection is, thereby facilitating the removal of the broken bolt.

[0020] Furthermore, the first wire taking groove is a circular groove, and the thickness of the first convex rib gradually increases from the groove opening to the groove bottom of the first wire taking groove.

[0021] The beneficial effect of adopting the above further solution is that the deeper the insertion depth of the first sleeve body is, the greater the connection strength between the broken bolt and the first wire extraction groove is.

[0022] Furthermore, the first wire taking groove is a conical groove, and the diameter of the first wire taking groove gradually decreases from the groove mouth to the groove bottom.

[0023] The beneficial effect of adopting the above further solution is that the deeper the insertion depth of the first sleeve body is, the greater the connection strength between the broken bolt and the first wire extraction groove is.

[0024] Furthermore, the wire taking sleeve includes a second cylindrical sleeve body, a second bolt head is fixedly provided at one end of the second sleeve body, a second wire taking groove is provided at the other end of the second sleeve body, a plurality of wire taking fan-shaped pieces are fixedly provided at the bottom of the second wire taking groove, and the plurality of wire taking fan-shaped pieces are arranged in a circular matrix at intervals to form a trumpet-shaped structure coaxial with the second wire taking groove, the large mouth end of the trumpet-shaped structure is arranged at the notch of the second wire taking groove, the outer wall of the wire taking fan-shaped piece and the inner wall of the second wire taking groove are arranged at intervals, and an adjustment mechanism for adjusting the inner diameter of the trumpet-shaped structure is provided between the outer wall of the wire taking fan-shaped piece and the inner wall of the second wire taking groove; a plurality of second convex ribs are arranged at intervals along the axial direction of the second wire taking groove in the wire taking fan-shaped piece, and the length direction of the second convex ribs extends from the notch of the second wire taking groove to the bottom of the groove.

[0025] The beneficial effect of adopting the above further scheme is: through the adjustment mechanism, the inner diameter of the trumpet-shaped structure is realized, and then the strength of the second rib in the wire-taking fan-shaped piece against the outer wall of the broken bolt is adjusted, and the friction coefficient is adjusted to achieve the best disassembly effect.

[0026] Furthermore, the adjustment mechanism includes a slider slidably arranged between the outer wall of the wire-taking sector and the inner wall of the second wire-taking groove, and the two sides of the slider are slidably connected to the outer wall of the wire-taking sector and the inner wall of the second wire-taking groove respectively. One end of the slider away from the notch of the second wire-taking groove is fixedly connected to one end of a connecting rod, and the other end of the connecting rod slides through and extends out of the second sleeve body and the second bolt head.

[0027] The beneficial effect of adopting the above-mentioned further scheme is: by pushing or knocking the connecting rod at the end of the second bolt head, the slider fixed on the connecting rod moves in the direction of the slot of the second wire taking groove, and then the strength of the second rib in the wire taking fan-shaped piece to clamp the broken screw is adjusted, thereby achieving the best disassembly effect.

[0028] The beneficial effects of the present invention are: through the innovative solution provided by the present invention, broken bolts can be effectively and safely removed, the possibility of damage to the threads can be reduced, and the installation efficiency and safety of the wind turbine can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the wire extraction tool in the first embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the wire extraction sleeve in the third embodiment of the present invention;

[0031] Figure 3 It is a structural schematic diagram of a wire extraction sleeve in a fourth embodiment of the present invention;

[0032] Figure 4 It is a top view of the wire extraction sleeve in the fourth embodiment of the present invention;

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1. Pull rod; 2. First sleeve body; 3. First bolt head; 4. First wire extraction groove; 5. First convex rib; 6. Second sleeve body; 7. Second bolt head; 8. Second wire extraction groove; 9. Wire extraction fan-shaped piece; 10. Second convex rib; 11. Sliding block; 12. Connecting rod. DETAILED DESCRIPTION

[0035] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0036] Embodiment 1

[0037] This embodiment includes the following steps:

[0038] Step 1: Find and mark the location of the broken bolt;

[0039] Step 2: Clean the area around the broken bolt;

[0040] Step 3: Use a wire extraction tool to fix the head of the broken bolt;

[0041] Step 4: Apply torque and outward axial pulling force to the wire extraction tool to gradually loosen the broken bolt until it is completely detached.

[0042] In step three of the present embodiment, when there is no gap between the broken bolt and the bolt hole, a drilling tool is used to drill a hole at the top center position of the broken bolt, and one end of the wire extraction tool is fixedly inserted into the hole. When there is no gap between the broken bolt and the bolt hole, the wire extraction tool is fixedly connected to the hole at the top of the broken bolt. By pulling out and rotating the wire extraction tool, a point of action can be provided for removing the broken bolt, thereby facilitating the removal of the broken bolt.

[0043] Further, if Figure 1 As shown, the wire extraction tool is a rod 1 with a cylindrical end. The cylindrical end of the rod 1 is inserted into the hole and fixedly connected with the hole by interference fit. The rod 1 and the hole are fixedly connected by interference fit. The rod 1 is inserted into the hole by knocking to achieve a fixed connection between the rod 1 and the broken bolt, ensuring the strength of the fixed connection and facilitating the removal of the broken bolt. In order to facilitate the rotation of the rod 1, a polygonal structure is provided at one end of the rod 1, which can be a bolt head, and the end face edge of the other end (i.e., the end for inserting into the hole) is chamfered to facilitate alignment and insertion into the hole.

[0044] Embodiment 2

[0045] This embodiment includes the following steps:

[0046] Step 1: Find and mark the location of the broken bolt;

[0047] Step 2: Clean the area around the broken bolt;

[0048] Step 3: Use a wire extraction tool to fix the head of the broken bolt;

[0049] Step 4: Apply torque and outward axial pulling force to the wire extraction tool to gradually loosen the broken bolt until it is completely detached.

[0050] In step three of the present embodiment, when there is no gap between the broken bolt and the bolt hole, a drilling tool is used to drill a hole at the top center position of the broken bolt, and one end of the wire extraction tool is fixedly inserted into the hole. When there is no gap between the broken bolt and the bolt hole, the wire extraction tool is fixedly connected to the hole at the top of the broken bolt. By pulling out and rotating the wire extraction tool, a point of action can be provided for removing the broken bolt, thereby facilitating the removal of the broken bolt.

[0051] The wire extraction tool is an expansion screw rod. After the expansion screw rod is inserted into the hole, the expansion screw rod is activated so that the expansion screw rod is tightly fixed in the hole, which facilitates the removal of the broken bolt.

[0052] Embodiment 3

[0053] This embodiment includes the following steps:

[0054] Step 1: Find and mark the location of the broken bolt;

[0055] Step 2: Clean the area around the broken bolt;

[0056] Step 3: Use a wire extraction tool to fix the head of the broken bolt;

[0057] Step 4: Apply torque and outward axial pulling force to the wire extraction tool to gradually loosen the broken bolt until it is completely detached.

[0058] In the step three, when there is a gap between the broken bolt and the bolt hole, the wire extraction tool is a wire extraction sleeve, which is sleeved on the top of the broken bolt so that the interior of the wire extraction sleeve is in close contact with the broken bolt. The wire extraction sleeve is fixedly sleeved on the broken bolt to avoid drilling a hole in the broken bolt and to avoid further damage to the broken bolt.

[0059] Specifically, Figure 2 As shown, the wire extraction sleeve includes a cylindrical first sleeve body 2, one end of the first sleeve body 2 is fixedly provided with a first bolt head 3, the other end of the first sleeve body 2 is provided with a first wire extraction groove 4, a plurality of first ribs 5 are arranged in the first wire extraction groove 4 along the circumferential interval of the first wire extraction groove 4, the length direction of the first rib 5 extends from the notch of the first wire extraction groove 4 to the groove bottom, the inner wall of the first rib 5 gradually extends from the notch of the first wire extraction groove 4 to the groove bottom to the center direction of the first wire extraction groove 4, when the first sleeve body 2 is inserted on the broken bolt, the first rib 5 abuts against the outer wall of the broken bolt. The inner wall of the first rib 5 arranged in the first wire extraction groove 4 gradually extends from the notch of the first wire extraction groove 4 to the groove bottom to the center direction of the first wire extraction groove 4, so that the deeper the insertion depth of the first sleeve body 2, the greater the connection strength between the broken bolt and the first wire extraction groove 4, and the more stable the connection, so as to facilitate the removal of the broken bolt.

[0060] In this embodiment, in order to achieve that the deeper the insertion depth of the first sleeve body 2 is, the greater the connection strength between the broken bolt and the first wire taking groove 4 is, the first wire taking groove 4 is a circular groove, and the thickness of the first rib 5 gradually increases from the groove mouth to the groove bottom of the first wire taking groove 4; or, the first wire taking groove 4 is a conical groove, and the diameter of the first wire taking groove 4 gradually decreases from the groove mouth to the groove bottom.

[0061] Embodiment 4

[0062] This embodiment includes the following steps:

[0063] Step 1: Find and mark the location of the broken bolt;

[0064] Step 2: Clean the area around the broken bolt;

[0065] Step 3: Use a wire extraction tool to fix the head of the broken bolt;

[0066] Step 4: Apply torque and outward axial pulling force to the wire extraction tool to gradually loosen the broken bolt until it is completely detached.

[0067] In the step three, when there is a gap between the broken bolt and the bolt hole, the wire extraction tool is a wire extraction sleeve, which is sleeved on the top of the broken bolt so that the interior of the wire extraction sleeve is in close contact with the broken bolt. The wire extraction sleeve is fixedly sleeved on the broken bolt to avoid drilling a hole in the broken bolt and to avoid further damage to the broken bolt.

[0068] Specifically, Figure 3 , Figure 4 As shown, the wire-taking sleeve includes a second cylindrical sleeve body 6, one end of the second sleeve body 6 is fixedly provided with a second bolt head 7, and the other end of the second sleeve body 6 is provided with a second wire-taking groove 8, the second wire-taking groove 8 is a circular groove, and the bottom of the second wire-taking groove 8 is fixedly provided with a plurality of wire-taking fan-shaped pieces 9, and the plurality of wire-taking fan-shaped pieces 9 are arranged in a circular matrix at intervals to form a trumpet-shaped structure coaxial with the second wire-taking groove 8, and the large mouth end of the trumpet-shaped structure is arranged at the notch of the second wire-taking groove 8, and the outer wall of the wire-taking fan-shaped piece 9 is spaced apart from the inner wall of the second wire-taking groove 8, and an adjustment mechanism for adjusting the inner diameter of the trumpet-shaped structure is provided between the outer wall of the wire-taking fan-shaped piece 9 and the inner wall of the second wire-taking groove 8; a plurality of second convex ribs 10 are spaced apart in the wire-taking fan-shaped piece 9 along the axial direction of the second wire-taking groove 8, and the length direction of the second convex ribs 10 extends from the notch of the second wire-taking groove 8 to the bottom of the groove. By adjusting the mechanism, the inner diameter of the trumpet-shaped structure is realized, and then the strength of the second rib 10 in the wire-taking sector 9 abutting against the outer wall of the broken bolt is adjusted, and the friction coefficient is adjusted to achieve the best disassembly effect.

[0069] In this embodiment, the adjustment mechanism includes a slider 11 slidably disposed between the outer wall of the wire-taking sector 9 and the inner wall of the second wire-taking groove 8, and the two sides of the slider 11 are respectively slidably connected to the outer wall of the wire-taking sector 9 and the inner wall of the second wire-taking groove 8, and one end of the slider 11 away from the notch of the second wire-taking groove 8 is fixedly connected to one end of a connecting rod 12, and the other end of the connecting rod 12 slides through and extends out of the second sleeve body 6 and the second bolt head 7. By pushing or knocking the connecting rod 12 at the end of the second bolt head 7, the slider 11 fixed on the connecting rod 12 moves in the direction of the notch of the second wire-taking groove 8, thereby adjusting the strength of the second rib 10 in the wire-taking sector 9 to clamp the broken screw, thereby achieving the best disassembly effect.

[0070] The innovative solution provided by the present invention can effectively and safely remove broken bolts, reduce the possibility of thread damage, and improve the installation efficiency and safety of wind turbines. It can quickly and accurately remove broken bolts while protecting the integrity of the original threads to the maximum extent. Especially for large wind power facilities, this efficient and reliable solution helps to shorten downtime, reduce maintenance costs, and improve the operational reliability of the entire system.

[0071] In the description of the present invention, it is necessary to understand that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0072] In the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0073] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for removing broken bolts during the installation of a wind turbine generator set, characterized in that: The following steps are involved: Step 1: Find and mark the location of the broken bolt; Step 2: Clean the area around the broken bolt; Step 3: Use a wire extraction tool to fix the head of the broken bolt; Step 4: Apply torque and outward axial pulling force to the wire extraction tool to gradually loosen the broken bolt until it is completely detached.

2. A method for removing broken bolts during installation of a wind turbine generator set according to claim 1, characterized in that: In the step three, when there is no gap between the broken bolt and the bolt hole, a hole is drilled at the top center of the broken bolt using a drilling tool, and one end of the wire extraction tool is fixedly inserted into the hole.

3. A method for removing broken bolts during installation of a wind turbine generator set according to claim 2, characterized in that: The wire extraction tool is a pull rod (1) with a cylindrical end, and the cylindrical end of the pull rod (1) is inserted into the hole and fixedly connected with the hole through interference fit.

4. A method for removing broken bolts during installation of a wind turbine generator set according to claim 2, characterized in that: The wire extraction tool is an expansion screw rod.

5. A method for removing broken bolts during installation of a wind turbine generator set according to claim 1, characterized in that: In the step three, when there is a gap between the broken bolt and the bolt hole, the wire extraction tool is a wire extraction sleeve, which is sleeved on the top of the broken bolt so that the interior of the wire extraction sleeve is in close contact with the broken bolt.

6. A method for removing broken bolts during installation of a wind turbine generator set according to claim 5, characterized in that: The wire extraction sleeve comprises a first cylindrical sleeve body (2), one end of which is fixedly provided with a first bolt head (3), and the other end of the first sleeve body (2) is provided with a first wire extraction groove (4), and a plurality of first convex ribs (5) are arranged in the first wire extraction groove (4) at intervals along the circumference of the first wire extraction groove (4), and the length direction of the first convex rib (5) extends from the notch of the first wire extraction groove (4) to the bottom of the groove, and the inner wall of the first convex rib (5) gradually extends from the notch of the first wire extraction groove (4) to the bottom of the groove toward the center of the first wire extraction groove (4), and when the first sleeve body (2) is inserted into the broken bolt, the first convex rib (5) abuts against the outer wall of the broken bolt.

7. A method for removing broken bolts during installation of a wind turbine generator set according to claim 6, characterized in that: The first wire taking groove (4) is a circular groove, and the thickness of the first convex rib (5) gradually increases from the groove opening to the groove bottom of the first wire taking groove (4).

8. A method for removing broken bolts during installation of a wind turbine generator set according to claim 6, characterized in that: The first wire taking groove (4) is a conical groove, and the diameter of the first wire taking groove (4) gradually decreases from the groove opening to the groove bottom.

9. A method for removing broken bolts during installation of a wind turbine generator set according to claim 5, characterized in that: The wire-taking sleeve comprises a cylindrical second sleeve body (6), one end of which is fixedly provided with a second bolt head (7), the other end of which is provided with a second wire-taking groove (8), a plurality of wire-taking fan-shaped pieces (9) are fixedly provided at the bottom of the second wire-taking groove (8), the plurality of wire-taking fan-shaped pieces (9) are arranged in a circular matrix at intervals to form a trumpet-shaped structure coaxial with the second wire-taking groove (8), and the large mouth end of the trumpet-shaped structure is provided at the second wire-taking groove At the notch of the second wire taking groove (8), the outer wall of the wire taking fan-shaped piece (9) and the inner wall of the second wire taking groove (8) are arranged at intervals, and an adjustment mechanism for adjusting the inner diameter of the trumpet-shaped structure is provided between the outer wall of the wire taking fan-shaped piece (9) and the inner wall of the second wire taking groove (8); a plurality of second convex ribs (10) are arranged at intervals along the axial direction of the second wire taking groove (8) in the wire taking fan-shaped piece (9), and the length direction of the second convex ribs (10) extends from the notch of the second wire taking groove (8) to the bottom of the groove.

10. A method for removing broken bolts during installation of a wind turbine generator set according to claim 9, characterized in that: The adjustment mechanism includes a slider (11) slidably arranged between the outer wall of the wire-taking sector (9) and the inner wall of the second wire-taking groove (8), and the two sides of the slider (11) are slidably connected to the outer wall of the wire-taking sector (9) and the inner wall of the second wire-taking groove (8) respectively. One end of the slider (11) away from the notch of the second wire-taking groove (8) is fixedly connected to one end of a connecting rod (12), and the other end of the connecting rod (12) slides through and extends out of the second sleeve body (6) and the second bolt head (7).

Images