A flange bolt hole centering tool

Abstract

This utility model discloses a flange bolt hole alignment fixture, characterized in that it includes an adjusting bolt, a positioning sleeve, a conical female block, and a conical male block. The adjusting bolt, positioning sleeve, and conical female block are coaxially connected in sequence to form a conical body. The conical female block is located in a second through hole, and the conical male block passes through a through groove and contacts a conical recess. The adjusting bolt passes through a first through hole, with one end of the adjusting bolt embedded in the recess. During alignment, the flange bolt hole alignment fixture is symmetrically installed on two flange holes, using the same conical block (i.e., the conical male block) for both flange holes. The adjustment bolt is rotated to increase or decrease the outer diameter of the multiple conical blocks. This fixture is suitable for a wide range of two-axis flange alignment operations, ensuring the quality of bolt installation.

Description

Technical Field

[0001] This utility model belongs to the field of maintenance technology and relates to a flange bolt hole centering tool. Background Technology

[0002] Bolts and holes are generally interference fits, but in the installation scheme of large shaft flange connection bolts, the installation requirements are high, and the connection bolts and holes between shafts are generally transition fits, such as the connection between thrust shaft, intermediate shaft or stern shaft and hole.

[0003] In existing technology, a hoist is needed to align the flange holes of the two shafts during installation. However, the alignment process currently relies mainly on the operator's visual observation and tactile judgment. This often results in the two holes being misaligned, meaning the centers of the bolt holes on the front and rear flanges cannot be aligned. During installation, the bolts are mainly guided and barely inserted into the bolt holes by using the chamfer of the bolts, but this method is highly likely to damage the bolts and holes, leading to a decrease in installation quality.

[0004] Therefore, it is necessary to develop a flange bolt hole alignment tool to effectively solve the problem of flange bolt hole alignment. Utility Model Content

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A flange bolt hole centering fixture includes an adjusting bolt, a positioning sleeve, a conical female block, and a conical male block, wherein the adjusting bolt, positioning sleeve, and conical female block are coaxially connected in sequence. The positioning sleeve includes a first cylinder and a second cylinder, the diameter of the first cylinder is larger than the diameter of the second cylinder, the first cylinder is provided with a first through hole, and the second cylinder is provided with a second through hole; a plurality of through grooves are evenly spaced on the circumference of the second cylinder; The cone-shaped mother block is a cone, and the head of the cone-shaped mother block is provided with a groove, and the circumferential surface of the cone-shaped mother block is provided with a plurality of cone-shaped grooves. One side of the tapered block is an arc surface, and the other side is an inclined plane. The taper of the inclined plane matches the taper of the tapered groove. The conical female block is located in the second through hole, and the conical male block passes through the through groove and contacts the conical groove; the adjusting bolt passes through the first through hole, and one end of the adjusting bolt is embedded in the groove.

[0006] As a further embodiment of this utility model: the adjusting bolt includes a small cylinder, which is threadedly connected to the positioning sleeve.

[0007] As a further embodiment of this utility model: an external thread is provided on the outer periphery of one end of the small cylinder, and the length of the external thread is greater than the length of the first through hole.

[0008] As a further embodiment of this utility model, it also includes a positioning nut; the other end of the small cylinder extends into a large cylinder, the diameter of which is larger than the diameter of the small cylinder; the large cylinder is embedded in the groove, the positioning nut is sleeved on the small cylinder, and the end face of the positioning nut abuts against the connecting surface of the large cylinder and the large cylinder; the positioning nut is connected to the groove through an external thread.

[0009] As a further embodiment of this invention, the end face of the large cylinder is chamfered.

[0010] As a further embodiment of this utility model: one end of the small cylinder extends into a square shape.

[0011] As a further embodiment of this utility model, the large cylinder and the groove are fitted with a clearance.

[0012] As a further embodiment of this utility model: the positioning sleeve is in clearance fit with the conical female block; the through groove is in clearance fit with the conical male block.

[0013] As a further embodiment of this utility model: there are 4 through grooves, 4 conical grooves, and 4 tapered blocks.

[0014] The beneficial effects of this utility model are: A flange bolt hole centering fixture includes a conical female block housed within a locating sleeve, and a conical male block passing through the locating sleeve and contacting the conical female block. The conical male block has an inclined plane and an arc surface. The taper ratio of the inclined plane matches the taper ratio of the conical groove on the conical female block, and its thickness is clearance-fitted with the conical groove. The taper of the conical surface is consistent. When the conical female block moves axially towards its rear end through the action of the adjusting bolt, the conical male block experiences radial movement due to the thrust of the conical surface. This increases the symmetrical diameter of the conical female block, while decreasing its symmetrical diameter.

[0015] During the alignment process, it is only necessary to install the flange bolt hole alignment fixture symmetrically on the two flange holes. The two flange holes use the same cone block, i.e., the tapered common block, for alignment operation. Rotate the adjusting bolt to increase or decrease the outer diameter of multiple cone blocks. This fixture is suitable for a wide range of two-axis flange alignment and installation operations, and can more effectively ensure the installation quality of bolts. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a flange bolt hole centering tooling structure; Figure 2 yes Figure 1Schematic diagram of section AA; Figure 3 This is a front structural diagram of the adjusting bolt of a flange bolt hole centering tool; Figure 4 This is a front structural diagram of a positioning sleeve for a flange bolt hole centering tool; Figure 5 yes Figure 4 Schematic diagram of BB section; Figure 6 This is a front structural diagram of a conical mother block for a flange bolt hole centering tool; Figure 7 This is a side view of the conical mother block of a flange bolt hole centering tool. Figure 8 This is a front structural diagram of a tapered male block for a flange bolt hole centering tool; Figure 9 This is a side view of the tapered male block of a flange bolt hole centering tool. Figure 10 This is a schematic diagram showing the eccentricity of the two flange connection holes; Figure 11 This is an assembly diagram of a flange bolt hole alignment tool. Figure 1 ; Figure 12 This is an assembly diagram of a flange bolt hole alignment tool. Figure 2 ; Figure 13 This is an assembly diagram of a flange bolt hole alignment tool. Figure 3 ; Figure 14 This is a schematic diagram of the tail shaft system; Figure 15 This is a schematic diagram of the intermediate shaft hoisting; As shown in the diagram: 1-Adjusting bolt, 101-Small cylinder, 102-External thread, 103-Large cylinder, 104-Chamfer, 105-Square body. 2-Positioning sleeve, 201-First cylinder, 202-Second cylinder, 203-First through hole, 204-Second through hole, 205-Through groove, 206-Internal thread. 3-Conical mother block, 301-groove, 302-Conical groove, 4- Tapered block, 401- Circular arc surface, 402- Inclined plane, 5-Locking nut, 6-Calabash, 7-Intermediate shaft, 8-Flange. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. It should be understood that this application is not limited to the exemplary embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0018] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] like Figure 1-9 As shown, a flange bolt hole centering fixture includes an adjusting bolt 1, a positioning sleeve 2, a conical female block 3, and a conical male block 4, which are coaxially connected in sequence.

[0022] The positioning sleeve 2 includes a first cylinder 201 and a second cylinder 202. The diameter of the first cylinder 201 is larger than the diameter of the second cylinder 202. The first cylinder 201 has a first through hole 203, and the second cylinder 202 has a second through hole 204. Several through grooves 205 are evenly spaced on the circumference of the second cylinder 202. The conical mother block 3 is a cone. The head of the conical mother block 3 has a groove 301, and the circumferential surface of the conical mother block 3 has several conical grooves 302.

[0023] One side of the tapered block 4 is an arc surface 401, and the other side is an inclined plane 402. The taper of the inclined plane 402 matches the taper of the tapered surface of the tapered groove 302.

[0024] The conical mother block 3 is located in the second through hole 204, and the conical male block 4 passes through the through groove 205 and is in contact with the conical groove 302; the adjusting bolt 1 passes through the first through hole 203, and one end of the adjusting bolt 1 is embedded in the groove 301.

[0025] A flange bolt hole centering fixture includes a conical female block 3 housed within a positioning sleeve 2, and a tapered male block 4 passing through the positioning sleeve 2 and contacting the conical female block 3. The tapered male block 4 has an inclined plane 402 and an arc surface 401. The taper ratio of the inclined plane 402 matches the taper ratio of the conical groove 302 of the conical female block 3, and its thickness is clearance-fitted with the conical groove 302. The taper of the conical surfaces is consistent. When the conical female block 3 moves axially to its rear end under the action of the adjusting bolt 1, the tapered male block 4 is subjected to the thrust of the conical surface and moves radially, which can increase the symmetrical diameter of the conical female block 3 and decrease its symmetrical diameter.

[0026] During the alignment process, only two sets of flange bolt hole alignment fixtures need to be symmetrically installed on the two flange holes. The two flange holes use the same cone block, namely the tapered block 4, for alignment operation. Rotating the adjusting bolt 1 increases or decreases the outer diameter of multiple cone blocks. This fixture is suitable for a wide range of two-axis flange 8 alignment and installation operations, and can more effectively ensure the installation quality of bolts.

[0027] like Figure 10-15 As shown, the specific implementation method of the tooling solution is as follows: like Figure 14 As shown, taking the disassembly and assembly of the tail shaft system as an example, the process includes: disassembly of the connecting bolts of the front and rear flanges 8 of the intermediate shaft 7, shaft system inspection and repair, installation of the connecting bolts of the front and rear flanges 8 of the intermediate shaft 7, and finally, the use of the flange bolt hole alignment tool involved in the installation. like Figure 15 As shown, the intermediate shaft 7 is usually hoisted using a hoist 6 and a main machine trolley, so that the flange holes of the two shafts are aligned. The alignment of the flange holes of the two shafts mentioned here is only a rough alignment. In reality, there is an eccentricity between them, which is generally about 0.2mm. like Figure 11As shown, install the centering fixture: use a wrench to rotate the adjusting bolt 1 to increase the outer diameter of the tapered block 4 in parallel, and support it against the surfaces of the two flanges 8 so that the center lines of all connecting bolt holes of the two flanges 8 are aligned; install other tight-fitting bolts, and finally disassemble the centering fixture and install the tight-fitting bolts.

[0028] In this embodiment, as Figure 3 and 4 As shown, the adjusting bolt 1 includes a small cylinder 101, which is threadedly connected to the positioning sleeve 2. Specifically, one end of the adjusting bolt 1 is embedded in the groove 301, and the adjusting bolt 1 is threadedly fastened to the positioning sleeve 2, thereby fixing the conical mother block 3 to the positioning sleeve 2.

[0029] In this embodiment, as Figure 3-5 As shown, an external thread 102 is provided on the outer periphery of one end of the small cylinder 101, and the length of the external thread 102 is greater than the length of the first through hole 203. Specifically, the external thread 102 on the small cylinder 101 enables a stable connection between the adjusting bolt 1 and the internal thread 206 of the positioning sleeve 2. When the adjusting bolt 1 is rotated, the axial force generated will push the conical mother block 3 to move within the second through hole 204, and the movement of the conical mother block 3 will further affect the distance by which the tapered male block 4 extends out of the through groove 205, thus making it suitable for a wide range of two-axis flange 8 alignment installation scenarios and meeting diverse engineering application needs.

[0030] In this embodiment, as Figure 6 and 7 As shown, it also includes a positioning nut 5; a large cylinder 103 extends from the other end of the small cylinder 101, the diameter of the large cylinder 103 being larger than the diameter of the small cylinder 101; the large cylinder 103 is embedded in the groove 301, and the positioning nut 5 is sleeved on the small cylinder 101, with the end face of the positioning nut 5 abutting against the connecting surface of the large cylinder 103; the positioning nut 5 is connected to the groove 301 via an external thread. The large cylinder 103 and the groove 301 are in a clearance fit.

[0031] Specifically, a large cylinder 103 is mounted on the small cylinder 101, together forming a stepped structure. The large cylinder 103 is embedded inside the groove 301 of the conical mother block 3, and the large cylinder 103 and the groove 301 are in a clearance fit, allowing the large cylinder 103 to rotate circumferentially relative to the groove 301. A positioning nut 5 is located at the bottom end of the large cylinder 103, and is securely connected to the groove 301, abutting against the large cylinder 103, thereby effectively preventing the large cylinder 103 from falling off.

[0032] In this embodiment, as Figure 3As shown, the end face of the large cylinder 103 is chamfered 104. Specifically, the end face of the large cylinder 103 is chamfered 104. During assembly, the side of the large cylinder 103 enters the positioning sleeve 2 first. At this time, the chamfer 104 on the end face can effectively reduce the resistance during insertion, providing convenient conditions for the large cylinder 103 to smoothly enter the positioning sleeve 2.

[0033] In this embodiment, as Figure 3 As shown, a square body 105 extends from one end of the small cylinder 101. Specifically, one side of the small cylinder 101 is located outside the positioning sleeve 2, which is used to realize the function of manipulating rotation. The square body 105 is provided to facilitate the use of a wrench to rotate the adjusting bolt 1.

[0034] In this embodiment, as Figure 1 As shown, the positioning sleeve 2 and the conical female block 3 are in clearance fit; the through groove 205 and the tapered male block 4 are in clearance fit. Specifically, the first through hole 203 is in clearance fit with the conical female block 3, and the conical female block 3 slides axially within the first through hole 203. The through groove 205 is in clearance fit with the tapered male block 4, and the tapered male block 4 slides radially within the through groove 205.

[0035] In this embodiment, as Figure 2 , 5 As shown in Figure 7, there are 4 through slots 205, 4 tapered grooves 302, and 4 tapered male blocks 4. Specifically, the number of through slots 205, tapered grooves 302, and tapered male blocks 4 are the same, and their positions are matched. Four of them are set at equal intervals around the circumference to meet the basic requirements for the alignment of the bolt holes of flange 8. In other embodiments, the size can be adjusted to set multiple ones.

[0036] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flange bolt hole centering tool, characterized by, It includes an adjusting bolt, a positioning sleeve, a conical female block, and a conical male block, wherein the adjusting bolt, positioning sleeve, and conical female block are coaxially connected in sequence; The positioning sleeve includes a first cylinder and a second cylinder, the diameter of the first cylinder is larger than the diameter of the second cylinder, the first cylinder is provided with a first through hole, and the second cylinder is provided with a second through hole; a plurality of through grooves are evenly spaced on the circumference of the second cylinder; The cone-shaped mother block is a cone, and the head of the cone-shaped mother block is provided with a groove, and the circumferential surface of the cone-shaped mother block is provided with a plurality of cone-shaped grooves. One side of the tapered block is an arc surface, and the other side is an inclined plane. The taper of the inclined plane matches the taper of the tapered groove. The conical female block is located in the second through hole, and the conical male block passes through the through groove and contacts the conical groove; the adjusting bolt passes through the first through hole, and one end of the adjusting bolt is embedded in the groove.

2. The flange bolt hole alignment fixture of claim 1, wherein, The adjusting bolt includes a small cylinder, which is threadedly connected to the positioning sleeve.

3. The flange bolt hole alignment fixture of claim 2, wherein, An external thread is provided on the outer periphery of one end of the small cylinder, and the length of the external thread is greater than the length of the first through hole.

4. The flange bolt hole alignment fixture of claim 3, wherein, It also includes a positioning nut; the other end of the small cylinder extends into a large cylinder, the diameter of which is larger than that of the small cylinder; the large cylinder is embedded in the groove, the positioning nut is sleeved on the small cylinder, and the end face of the positioning nut abuts against the connecting surface of the large cylinder and the large cylinder; the positioning nut is connected to the groove by an external thread.

5. The flange bolt hole alignment fixture of claim 4, wherein, The end face of the large cylinder is chamfered.

6. The flange bolt hole alignment fixture of claim 5, wherein, One end of the small cylinder extends into a square shape.

7. The flange bolt hole alignment fixture of claim 4, wherein, The large cylinder is fitted with the groove with a clearance.

8. The flange bolt hole alignment fixture of claim 7, wherein, The positioning sleeve is clearance-fitted with the conical female block; the through groove is clearance-fitted with the conical male block.

9. The flange bolt hole alignment fixture of claim 1, wherein, There are 4 through slots, 4 tapered grooves, and 4 tapered blocks.

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