Measuring device for bolt stretching

Abstract

The utility model discloses a measuring device for bolt stretching. The measuring device comprises a support assembly, a clamping assembly, a first installation part, a first length measuring assembly, a second installation part and a second length measuring assembly. One end of the clamping assembly is connected to the support assembly, and the other end of the clamping assembly is detachably connected to a flange. One end of the first installation part is connected to the support assembly, and the first length measurement assembly is installed at the end, away from the support assembly, of the first installation part and used for measuring the length variation of the bolt. One end of the second installation part is connected to the support assembly, and the second length measurement assembly is installed at the end, away from the support assembly, of the second installation part and used for measuring the length variation of the bolt. According to the measuring device for bolt stretching, the elongation of the bolt in the stretching process can be monitored in real time, and an operator can dynamically adjust the hydraulic pressure of the stretcher according to the target pre-tightening force requirement.

Description

Technical Field

[0001] This utility model relates to a measuring device for bolt tension. Background Technology

[0002] In existing technology, for components connected by two flanges, the fastening between the two flanges is typically achieved by a set of bolts and nuts evenly distributed along the circumference of the flanges. To increase the preload of the bolts on the flanges, a bolt tensioner is used to preload the bolts. To ensure the preload effect, the bolt elongation needs to be measured after tensioning.

[0003] Specifically, after the tensioner is unloaded, operators need to use external length measuring tools (such as calipers or micrometers) to check the actual elongation of the bolts to verify whether the preload meets the requirements. However, this measurement method has problems such as cumbersome operation and low efficiency. Especially in space-constrained or batch assembly scenarios, the existing measurement method not only increases the operation time, but also introduces a large measurement error due to the measurement after the tensioner is unloaded, affecting the reliability of the connection structure.

[0004] The statements herein provide only background information relating to this invention and do not necessarily constitute prior art. Utility Model Content

[0005] The purpose of this invention is to provide a measuring device for bolt tension, which has the advantage of being able to measure in real time during the bolt tensioning process.

[0006] To achieve the above objectives, this utility model provides a measuring device for bolt tension, comprising:

[0007] Support assembly;

[0008] The clamping assembly has one end connected to the bracket assembly and the other end for detachable connection to the flange;

[0009] A first mounting part and a first length measuring component, one end of the first mounting part is connected to the bracket assembly, and the first length measuring component is mounted on the end of the first mounting part away from the bracket assembly. The first length measuring component is used to measure the length change of the bolt.

[0010] A second mounting part and a second length measuring component are provided. One end of the second mounting part is connected to the bracket assembly, and the second length measuring component is mounted on the end of the second mounting part away from the bracket assembly. The second length measuring component is used to measure the change in the length of the bolt.

[0011] The first mounting part, the clamping assembly, and the second mounting part are sequentially arranged on the bracket assembly.

[0012] Optionally, the first length measuring component and the second length measuring component each include a displacement measuring instrument.

[0013] Optionally, the displacement measuring instrument includes a mechanical dial indicator.

[0014] Optionally, the clamping assembly includes a first clamping part and a second clamping part, one end of the first clamping part and the second clamping part are respectively sleeved on the bracket assembly, and can move along the axial direction of the bracket assembly to adjust the distance between the first clamping part and the second clamping part.

[0015] Optionally, the first clamping part includes two first clamping arms, which extend from the bracket assembly in a direction away from the bracket assembly; the second clamping part includes two second clamping arms, which extend from the bracket assembly in a direction away from the bracket assembly.

[0016] Optionally, the measuring device further includes a first locking assembly and a second locking assembly, wherein the first locking assembly is used to lock the first clamping part and the bracket assembly; and the second locking assembly is used to lock the second clamping part and the bracket assembly.

[0017] Optionally, the bracket assembly includes a threaded rod with external threads, the first locking assembly includes a plurality of nuts, the plurality of nuts respectively threadedly engaging with the bracket assembly to lock the first clamping portion; the second locking assembly includes a plurality of nuts, the plurality of nuts respectively threadedly engaging with the bracket assembly to lock the second clamping portion.

[0018] Optionally, the measuring device further includes a third locking assembly and a fourth locking assembly, wherein the third locking assembly is used to lock the first mounting portion and the bracket assembly; and the fourth locking assembly is used to lock the second mounting portion and the bracket assembly.

[0019] Optionally, the bracket assembly includes a threaded rod with external threads, the third locking assembly includes a plurality of nuts, the plurality of nuts respectively threadedly engaging with the bracket assembly to lock the first mounting portion; the fourth locking assembly includes a plurality of nuts, the plurality of nuts respectively threadedly engaging with the bracket assembly to lock the second mounting portion.

[0020] In summary, compared with the prior art, the measuring device for bolt tension provided by this utility model has the following beneficial effects:

[0021] This utility model discloses a measuring device for bolt stretching, which can monitor the bolt elongation in real time during the stretching process. This allows operators to dynamically adjust the hydraulic pressure of the tensioner according to the target preload requirement, thereby improving assembly accuracy. Through real-time feedback control, it ensures that the bolt elongation is reached in one stretch, avoiding preload deviation caused by multiple adjustments in traditional methods. One-stretch-to-the-point-per-time stretching eliminates the risk of mechanical damage to the bolt threads caused by repeated stretching, extending the service life of fasteners. Furthermore, one-stretch-to-the-point-per-time stretching improves work efficiency and reduces the time spent on manual measurement after unloading the tensioner. The real-time feedback makes it suitable for scenarios with stringent preload accuracy requirements. Attached Figure Description

[0022] Figure 1 This is a front view of the measuring device of this application used to measure the bolt tension.

[0023] Figure 2 This is a second-view diagram of the measuring device of this application used to measure bolt tension.

[0024] Figure 3 This is a flowchart of the bolt tension measurement method of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] Bracket assembly 110

[0027] Clamping assembly 120

[0028] First clamping section 121

[0029] First clamping arm 1211

[0030] Second clamping section 122

[0031] Second clamping arm 1221

[0032] First Installation Department 130

[0033] First length measuring component 140

[0034] Second Installation Section 150

[0035] Second length measuring component 160

[0036] First locking component 171

[0037] Second locking component 172

[0038] Third locking component 173

[0039] Fourth locking component 174

[0040] Flange 210

[0041] Bolt 220 Detailed Implementation

[0042] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the bolt tension measuring device proposed in this utility model. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, intended only to facilitate and clearly illustrate the embodiments of this utility model. Please refer to the drawings to make the objectives, features, and advantages of this utility model more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0043] like Figure 1 and Figure 2 As shown, this utility model provides a measuring device for bolt tension. The measuring device includes a support assembly 110, a clamping assembly 120, a first mounting part 130, a first length measuring assembly 140, a second mounting part 150, and a second length measuring assembly 160.

[0044] Measuring devices such as Figure 1 As shown in the dashed box, one end of the clamping assembly 120 is connected to the bracket assembly 110, and the other end is detachably connected to the flange 210. When the connecting bolts 220 on the flange 210 are pre-tightened, the measuring device is used to measure the elongation of the bolts 220 in real time. The measuring device as a whole is connected to the flange 210 via the clamping assembly 120, and then the first length measuring assembly 140 and the second length measuring assembly 160 are used to measure the elongation of the bolts 220.

[0045] The first mounting portion 130 includes an elongated strip-shaped part with openings at both ends. The first mounting portion 130 is connected to the bracket assembly 110 through the opening at one end; the first length measuring assembly 140 is mounted on the opening at the end of the first mounting portion 130 away from the bracket assembly 110. The first length measuring assembly 140 includes a measuring head for abutting against the end face of the bolt 220 to measure the change in length of the bolt 220.

[0046] The second mounting portion 150 includes an elongated strip-shaped part with openings at both ends, wherein the second mounting portion 150 is connected to the bracket assembly 110 through the opening at one end; the second length measuring assembly 160 is mounted on the opening at the end of the second mounting portion 150 away from the bracket assembly 110. The second length measuring assembly 160 includes a measuring head for abutting against the other end face of the bolt 220 to measure the change in length of the bolt 220.

[0047] Along the axial direction of the bracket assembly 110, the first mounting part 130, the clamping assembly 120, and the second mounting part 150 are sequentially arranged on the bracket assembly 110. The first length measuring assembly 140 and the second length measuring assembly 160 located on both sides of the bolt 220 measure the elongation of the bolt 220.

[0048] The measuring device for bolt stretching disclosed in this application can monitor the elongation of bolt 220 in real time during the stretching process, allowing operators to dynamically adjust the hydraulic pressure of the tensioner according to the target preload requirement, thereby improving assembly accuracy. Through real-time feedback control, it ensures that the bolt 220 elongation is achieved in one stretch, avoiding preload deviation caused by multiple adjustments. Furthermore, real-time monitoring of bolt 220 elongation during the stretching process avoids the risk of mechanical damage to the bolt 220 threads caused by repeated stretching due to the inability to monitor in real time, thus improving the reliability of bolt 220. In addition, one-time stretching can improve work efficiency and reduce the time for manual measurement after unloading the tensioner. Moreover, real-time monitoring of bolt 220 elongation can improve stretching accuracy, making it suitable for scenarios with high preload accuracy requirements.

[0049] Continue as Figure 1 As shown, the first length measuring component 140 and the second length measuring component 160 respectively include displacement measuring instruments. The displacement measuring instruments can be contact mechanical dial indicators, digital dial indicators, or non-contact laser rangefinders, etc. There are no restrictions here, as long as they can measure the elongation of the bolt 220.

[0050] In this embodiment, the displacement measuring instrument includes a mechanical dial indicator. The mechanical dial indicator not only meets the accuracy requirements for measuring the tension of the 220mm bolt but also possesses sufficient reliability, thus improving the overall reliability of the measuring device. The measuring head of the mechanical dial indicator is a measuring pointer.

[0051] The measuring pointer is fully in contact with the end face of bolt 220. In order to ensure the accuracy of bolt 220 elongation measurement and avoid errors in the elongation measurement results due to poor flatness of bolt 220 end face, the form and position tolerance of bolt 220 meets the requirements of ISO2768-mK.

[0052] In a preferred embodiment, the clamping assembly 120 includes a first clamping portion 121 and a second clamping portion 122. One end of the first clamping portion 121 and the second clamping portion 122 are respectively sleeved on the bracket assembly 110 and can move along the axial direction of the bracket assembly 110 to adjust the distance between the first clamping portion 121 and the second clamping portion 122.

[0053] In this embodiment, the first clamping part 121 and the second clamping part 122 are two independent structures. The first clamping part 121 and the second clamping part 122, respectively provided, can each be adjusted in position on the bracket assembly 110, improving the adjustment flexibility of the first clamping part 121 and the second clamping part 122. The distance between the first clamping part 121 and the second clamping part 122 can be adjusted according to different flange 210 thicknesses.

[0054] In other embodiments, the first clamping part 121 and the second clamping part 122 may also be an integral structure.

[0055] like Figure 2 As shown, the first clamping part 121 includes two forked first clamping arms 1211, each extending from the support assembly 110 in a direction away from the support assembly 110; the second clamping part 122 includes two forked second clamping arms 1221, each extending from the support assembly 110 in a direction away from the support assembly 110. When installed with the flange 210, the two first clamping arms 1211 of the first clamping part 121 are located on both sides of the bolt 220 and clamped onto the flange 210; the two second clamping arms 1221 of the second clamping part 122 are located on both sides of the bolt 220 and clamped onto the flange 210. This configuration improves the stability of the clamping of the flange 210 by the first clamping part 121 and the second clamping part 122 using a simple structure, thus improving the reliability of the structure.

[0056] In this embodiment, the measuring device further includes a first locking component 171 and a second locking component 172. The first locking component 171 is used to lock the first clamping part 121 and the bracket assembly 110; the second locking component 172 is used to lock the second clamping part 122 and the bracket assembly 110. By setting the first locking component 171 and the second locking component 172 to lock the first clamping part 121 and the second clamping part 122 respectively, when it is necessary to adjust the position of the first clamping part 121 or the second clamping part 122 on the bracket assembly 110, the first locking component 171 or the second locking component 172 can be released, thereby improving the flexibility of adjusting the position of the first clamping part 121 and the second clamping part 122. At the same time, setting the first locking component 171 and the second locking component 172 can also improve the reliability of locking.

[0057] In this embodiment, the bracket assembly 110 includes a threaded rod with external threads. The first locking assembly 171 includes a plurality of nuts, which are threadedly engaged with the bracket assembly 110 to lock the first clamping portion 121. Specifically, the first locking assembly 171 includes at least two nuts, which lock the first clamping portion 121 on both sides of the first clamping portion 121 along the axial direction of the bracket assembly 110, which has the advantages of simple structure and reliable locking.

[0058] The second locking assembly 172 includes a plurality of nuts, which are threadedly engaged with the bracket assembly 110 to lock the second clamping portion 122. Specifically, the second locking assembly 172 includes at least two nuts, which lock the second clamping portion 122 on both sides of the second clamping portion 122 along the axial direction of the bracket assembly 110, which has the advantages of simple structure and reliable locking.

[0059] Furthermore, the measuring device also includes a third locking assembly 173 and a fourth locking assembly 174. The third locking assembly 173 is used to lock the first mounting portion 130 and the bracket assembly 110. Specifically, the third locking assembly 173 includes at least two nuts, which lock the first mounting portion 130 on both sides of the first mounting portion 130 along the axial direction of the bracket assembly 110, respectively, which has the advantages of simple structure and reliable locking.

[0060] The fourth locking assembly 174 is used to lock the second mounting portion 150 and the bracket assembly 110. Specifically, the fourth locking assembly 174 includes at least two nuts, which lock the second mounting portion 150 on both sides of the second mounting portion 150 along the axial direction of the bracket assembly 110, respectively, and has the advantages of simple structure and reliable locking.

[0061] like Figure 3 As shown, this application also discloses a method for measuring bolt tension. The method is implemented using the bolt tension measuring device described above, and includes:

[0062] S10. Install the clamping assembly 120 on the flange 210, and fix the bracket assembly 110 and the clamping assembly 120 in place. Install the first mounting part 130 and the first length measuring assembly 140 on the bracket assembly 110, and install the second mounting part 150 and the second length measuring assembly 160 on the bracket assembly 110. The first length measuring assembly 140 and the second length measuring assembly 160 respectively abut against the two end faces of the bolt 220.

[0063] In this step, the measuring device is mounted on the flange 210 using the clamping assembly 120. The measuring heads of the first length measuring assembly 140 and the second length measuring assembly 160 are adjusted so that their measuring heads abut against the two end faces of the bolt 220 to be stretched. When the bolt 220 is stretched, the elongation of the bolt 220 can be obtained from the changes in the readings of the first length measuring assembly 140 and the second length measuring assembly 160.

[0064] S20. In this step, before the bolt 220 is stretched, the readings of the first length measuring component 140 and the second length measuring component 160 are recorded.

[0065] S30, tension bolt 220, causing bolt 220 to elongate. Since bolt 220 has a tendency to spring back after the tension force is removed, preload can be applied to flanges 210 on both sides.

[0066] S40. In this step, it is not necessary to remove the tensioning device of bolt 220. The readings of the first length measuring component 140 and the second length measuring component 160 are read in real time. The length change of bolt 220 after being stretched is calculated based on the changes in the readings of the first length measuring component 140 and the second length measuring component 160 before and after bolt 220 is stretched. When the length change of bolt 220 reaches the target length, the stretching is stopped, achieving the target stretching amount in one stretch, avoiding preload deviation caused by multiple adjustments; and real-time monitoring of bolt 220 elongation during the stretching process can avoid the risk of mechanical damage to the bolt 220 thread caused by repeated stretching due to the inability to monitor in real time, improving the reliability of bolt 220; and one stretching can improve work efficiency and reduce the time for manual measurement after unloading the tensioner.

[0067] It should 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.

[0068] In the description of this utility model, it should be understood that the terms "center," "height," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0069] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0070] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0071] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A measuring device for bolt tension, characterized in that, The measuring device includes: Support assembly; The clamping assembly has one end connected to the bracket assembly and the other end for detachable connection to the flange; A first mounting part and a first length measuring component, one end of the first mounting part is connected to the bracket assembly, and the first length measuring component is mounted on the end of the first mounting part away from the bracket assembly. The first length measuring component is used to measure the length change of the bolt. A second mounting part and a second length measuring component are provided. One end of the second mounting part is connected to the bracket assembly, and the second length measuring component is mounted on the end of the second mounting part away from the bracket assembly. The second length measuring component is used to measure the change in the length of the bolt. The first mounting part, the clamping assembly, and the second mounting part are sequentially arranged on the bracket assembly.

2. The measuring device for bolt tension as described in claim 1, characterized in that, The first length measuring component and the second length measuring component each include a displacement measuring instrument.

3. The measuring device for bolt tension as described in claim 2, characterized in that, The displacement measuring instrument includes a mechanical dial indicator.

4. The measuring device for bolt tension as described in claim 1, characterized in that, The clamping assembly includes a first clamping part and a second clamping part. One end of the first clamping part and the second clamping part are respectively sleeved on the bracket assembly and can move along the axial direction of the bracket assembly to adjust the distance between the first clamping part and the second clamping part.

5. The measuring device for bolt tension as described in claim 4, characterized in that, The first clamping part includes two first clamping arms, which extend from the bracket assembly in a direction away from the bracket assembly; the second clamping part includes two second clamping arms, which extend from the bracket assembly in a direction away from the bracket assembly.

6. The measuring device for bolt tension as described in claim 4, characterized in that, The measuring device further includes a first locking component and a second locking component, wherein the first locking component is used to lock the first clamping part and the bracket assembly; and the second locking component is used to lock the second clamping part and the bracket assembly.

7. The measuring device for bolt tension as described in claim 6, characterized in that, The bracket assembly includes a threaded rod with external threads. The first locking assembly includes a plurality of nuts, which are threadedly engaged with the bracket assembly to lock the first clamping portion. The second locking assembly includes a plurality of nuts, which are threadedly engaged with the bracket assembly to lock the second clamping portion.

8. The measuring device for bolt tension as described in claim 1, characterized in that, The measuring device further includes a third locking assembly and a fourth locking assembly. The third locking assembly is used to lock the first mounting part and the bracket assembly; the fourth locking assembly is used to lock the second mounting part and the bracket assembly.

9. The measuring device for bolt tension as described in claim 8, characterized in that, The bracket assembly includes a threaded rod with external threads; the third locking assembly includes a plurality of nuts, which are threadedly engaged with the bracket assembly to lock the first mounting portion; the fourth locking assembly includes a plurality of nuts, which are threadedly engaged with the bracket assembly to lock the second mounting portion.

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