Device for measuring surfacing deformation of tube plate
By designing a measuring device that includes channel steel, support shaft, connecting rod, spring, counterweight, slider nut, positioning stud, support column, measuring ruler and chuck, the problem of inconsistent measurement benchmarks was solved, and efficient and accurate tube sheet weld deformation measurement was achieved.
Patent Information
- Application Number
- CN202520597350.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Existing technologies for measuring tube sheet weld deformation suffer from inconsistent measurement benchmarks, low accuracy of manual measurements, and low operational efficiency, which affects the correct judgment of machining allowance and machining methods.
A measuring device was designed, comprising a channel steel, a support shaft, a connecting rod, a spring, a counterweight, a slider nut, a positioning stud, a support column, a measuring ruler, and a chuck. Through the sliding fit of the support shaft and the slider nut, the measurement reference is unified, thereby improving measurement accuracy and ease of operation.
It achieves a unified measurement standard, improves the accuracy and efficiency of measurement, and can adapt to workpieces of different diameters and thicknesses, meeting the measurement needs of welding deformation of various workpieces.
Smart Images
Figure CN223856388U_ABST
Abstract
Description
Technical Field
[0001] This application relates generally to the technical field of welded tube sheets, and more particularly to an apparatus for measuring the weld deformation of tube sheets. Background Technology
[0002] In recent years, with the increasing scale of chemical plants in the petroleum and chemical industries, higher requirements have been placed on the manufacturing of containers for these plants. For some large heat exchangers and reactors, tube sheet diameters can reach 4000 mm or even larger. As one of the most important components of a heat exchanger, ensuring tube sheet strength while conserving metal materials and reducing manufacturing costs has become a major issue in controlling equipment manufacturing costs. For some large heat exchangers or reactors, due to economic and usability requirements, weld overlay structures, i.e., low-alloy tube sheets as the base layer, are increasingly used to meet the strength requirements of the equipment. Additionally, one or more layers of corrosion-resistant alloy are welded onto the side in contact with corrosive media to meet corrosion resistance requirements.
[0003] Deformation typically occurs after tubesheet welding, and the shape and amount of deformation are often uncontrollable. The thickness and flatness of the tubesheet affect tube bundle assembly; exceeding thickness and flatness limits can lead to tube bundle tilting, tube ends not extending beyond the tubesheet, and other major quality issues. One characteristic of tubesheets with small thickness and large diameter is their lower resistance to bending deformation. A significant number of welded tubesheets exhibit varying degrees of deformation, necessitating post-processing to ensure the correct thickness and flatness. If the thickness and flatness of the welded tubesheet cannot be controlled within specified dimensions after welding, the heat exchanger tubes may not extend beyond the tubesheet, or the thickness of the base layer and cladding may not meet requirements after processing, resulting in defective products and significant losses.
[0004] Under the premise of meeting strength requirements, the welding of corrosion-resistant coatings on tube sheets of large chemical equipment is generally divided into two parts: a transition layer and a surface layer. The uniformity of the thickness of both the transition layer and the surface layer is generally required to be within 1 mm, which is not very accurate. There are various methods for measuring the flatness of a plane, which can be broadly divided into two categories: measurement using precision instruments and manual measurement. If precision instruments are used, the costs involved are high, including equipment, training, and maintenance; secondly, the operating environment is demanding, and the operating efficiency is low. If traditional manual measurement is used, the operation is highly arbitrary, the measurement benchmark is inconsistent, and the accuracy of the measurement results is low, affecting the correct judgment of processing allowances and processing methods by technicians later. Utility Model Content
[0005] In view of the above-mentioned technical problems, this disclosure proposes a device for measuring the weld deformation of a tube sheet. The support device includes a channel steel with a rectangular groove at its bottom and a first pair of elongated oval slots on both sides of one end of the channel steel, and a second pair of elongated oval slots on both sides of the other end of the channel steel; a pair of support shafts, one of which is placed in the first pair of elongated oval slots and can slide within them, and the other of which is placed in the second pair of elongated oval slots and can slide within them; a plurality of connecting rods, one end of which is connected to one end of each support shaft; and a plurality of springs, one end of which is connected to the other end of each connecting rod. Multiple counterweights, each hung on the other end of the spring; a pair of slider nuts, embedded in the rectangular groove and capable of sliding along the rectangular groove; a pair of positioning studs, passing through the through holes of the slider nuts and fixed together with the slider nuts; a slider, embedded in the rectangular groove and capable of sliding along the rectangular groove; a support column, passing through the through holes of the slider and fixed together with the slider; a measuring ruler, fixed to the surface of the support column; and a chuck, located at the top of the channel steel and capable of sliding along the top of the channel steel.
[0006] In a preferred embodiment, the first pair of elongated slots and the second pair of elongated slots are in the same plane, which is parallel to the bottom plane of the channel steel.
[0007] In a preferred embodiment, the positioning stud and the support stud are positioned above the weld overlay of the tube sheet.
[0008] In a preferred embodiment, the pair of support shafts slide parallel to the rectangular groove.
[0009] In a preferred embodiment, the bottom of the measuring ruler is higher than the bottom of the support column.
[0010] In a preferred embodiment, the gap between the support column and the rectangular groove is greater than the gap between the measuring ruler and the rectangular groove.
[0011] In a preferred embodiment, the positioning stud and the slider nut are threaded together, allowing the slider nut to move up and down relative to the positioning stud to finely adjust the height of the channel steel.
[0012] In a preferred embodiment, the chuck is fixed to the channel steel by welding, and a slot is provided on the chuck, the slot corresponding to the rectangular slot at the bottom of the channel steel, and the support column is movable within the slot, the junction of the chuck and the measuring ruler being measured at the value to be measured.
[0013] In a preferred embodiment, the measuring ruler is made of steel plate.
[0014] Compared with the prior art, the beneficial effects of this disclosure are as follows: the measurement benchmark of the technical solution of this disclosure is unified, which improves the accuracy of measurement, is convenient to manufacture and use, and meets the measurement of welding deformation of various workpieces with different diameters and thicknesses. Attached Figure Description
[0015] The novel features of this application are specifically set forth in the appended claims. A better understanding of the features and advantages of this application will be gained by referring to the following detailed description and accompanying drawings, which illustrate illustrative embodiments in which the principles of this application are utilized. The drawings are for illustrative purposes only and should not be considered as limiting the scope of this application. Furthermore, the same reference numerals denote the same elements throughout the drawings, in which:
[0016] Figure 1 A schematic diagram of an apparatus for measuring weld overlay deformation of a tube sheet according to an exemplary embodiment of the present disclosure is shown;
[0017] Figure 2 A schematic diagram of a positioning stud for a device for measuring weld overlay deformation of a tube sheet according to an exemplary embodiment of the present disclosure is shown.
[0018] Figure 3 A schematic diagram of a measuring ruler for measuring weld overlay deformation of a tube sheet according to an exemplary embodiment of the present disclosure is shown.
[0019] Figure 4 A cross-sectional view of a measuring ruler for measuring weld overlay deformation of a tube sheet according to an exemplary embodiment of the present disclosure is shown.
[0020] Figure 5 A cross-sectional view of the support shaft of an apparatus for measuring weld overlay deformation of a tube sheet, according to an exemplary embodiment of the present disclosure, is shown; and
[0021] Figure 6 A side view of an apparatus for measuring weld overlay deformation of a tube sheet according to an exemplary embodiment of the present disclosure is shown.
[0022] Explanation of reference numerals in the attached drawings: 1-channel steel, 2-support shaft, 3-connecting rod, 4-spring, 5-counterweight, 6-slider nut, 7-positioning stud, 8-support column, 9-measuring ruler, 10-slider, 11-workpiece to be measured, and 12-chuck. Detailed Implementation
[0023] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this disclosure and to fully convey the scope of this disclosure to those skilled in the art. Nothing in the following detailed description is intended to suggest that any particular component or feature is essential to this application. Those skilled in the art will understand that various features may be substituted for or combined with each other without departing from the scope of this disclosure.
[0024] Figure 1 A schematic diagram of an apparatus for measuring weld deformation of a tube sheet according to an exemplary embodiment of the present disclosure is shown. As shown, the apparatus for measuring weld deformation of a tube sheet provided by the present disclosure may include: a channel steel 1, a pair of support shafts 2, multiple connecting rods 3, multiple springs 4, multiple counterweights 5, a slider nut 6, a positioning stud 7, a support column 8, a measuring ruler 9, a slider 10, a workpiece to be measured 11, and a chuck 12. A rectangular groove may be provided at the bottom of the channel steel 1, and a first pair of elongated oval hole grooves may be provided on both sides of one end of the channel steel 1, and a second pair of elongated oval hole grooves may be provided on both sides of the other end of the channel steel 1. One of the pair of support shafts 2 can be placed in the first pair of elongated oval hole grooves and can slide in the first pair of elongated oval hole grooves, and the other of the pair of support shafts 2 can be placed in the second pair of elongated oval hole grooves and can slide in the second pair of elongated oval hole grooves, so as to be suitable for measuring workpieces of different sizes. The technical solution of arranging the elongated oval hole grooves on both sides of the channel steel 1 can meet the requirements for measuring workpieces of different sizes without reducing the rigidity and strength of the channel steel 1. In a preferred embodiment, the pair of support shafts 2 can slide parallel to the rectangular groove. In a preferred embodiment, the first pair of elongated oval grooves and the second pair of elongated oval grooves are in the same plane, which is parallel to the bottom plane of the channel steel 1. One end of the connecting rod 3 can be connected to one end of the corresponding support shaft 2. One end of the spring 4 can be connected to the other end of the corresponding connecting rod 3. The counterweight 5 can be hung on the other end of the corresponding spring 4. The pair of slider nuts 6 can be embedded in the rectangular groove and can slide along the rectangular groove. Thus, the slider nuts 6 and the slider 10 can move linearly in the plane where the bottom surface of the channel steel 1 is located. Figure 2A schematic diagram of a positioning stud 7 for measuring weld overlay deformation of a tube sheet according to an exemplary embodiment of this disclosure is shown. In some embodiments, the cross-section of the slider nut 6 can be I-shaped for embedding in the rectangular slot. The positioning stud 7 can pass through the through hole of the slider nut 6 and be fixed together with the slider nut 6. In a preferred embodiment, the positioning stud 7 and the slider nut 6 can be threaded together, allowing the slider nut 6 to move up and down relative to the positioning stud 7 to fine-tune the height of the channel steel. The materials of the positioning stud 7 and the support column 8 can be selected from wear-resistant steel to increase service life. In a preferred embodiment, the positioning stud 7 and the support column 8 can be placed above the weld overlay 11 of the tube sheet. The bottom ends of the positioning stud 7 and the support column 8 can be machined into an arc shape to ensure point contact with the weld overlay 11 of the tube sheet, reduce movement resistance, increase measurement accuracy, and extend the service life of the positioning stud 7. Figure 3 A schematic diagram of a measuring ruler 9 for measuring weld overlay deformation of a tube sheet according to an exemplary embodiment of this disclosure is shown. The slider 10 can be embedded in the rectangular groove and can slide along the rectangular groove. In some embodiments, the slider 10 has an I-shaped cross-section for embedding in the rectangular groove. The support column 8 can pass through a through-hole of the slider 10 and be fixed to the slider 10. The measuring ruler 9 can be fixed to the surface of the support column 8. When the support column 8 moves freely in the through-hole of the slider 10, the measuring ruler can also move freely together to accurately measure the value at the point where the support column 8 is located. In a preferred embodiment, the measuring ruler 9 can be made of steel plate. In other embodiments, the measuring ruler 9 can be made of aluminum plate, copper plate, or any material deemed suitable by those skilled in the art. In a preferred embodiment, the bottom end of the measuring ruler 9 can be higher than the bottom end of the support column 8. Therefore, the measuring ruler 9 will not be worn during the movement of the support column 8. In a preferred embodiment, the gap between the support column 8 and the rectangular groove can be greater than the gap between the measuring ruler 9 and the rectangular groove. Therefore, when the support column 8 moves, only the support column 8 contacts the slider 10, and it will not cause wear to the measuring ruler 9. The chuck 12 can be located on top of the channel steel and can slide along the top of the channel steel.
[0025] Figure 4A schematic diagram of a measuring scale 9 and a chuck 12 for measuring weld deformation of a tube sheet according to an exemplary embodiment of this disclosure is shown. The slider 10 can be embedded in the rectangular slot and can slide along the rectangular slot. In some embodiments, the slider 10 has an I-shaped cross-section for embedding in the rectangular slot. In a preferred embodiment, the chuck 12 can be fixed to the channel steel 1 by welding. The chuck 12 may have a slot corresponding to a rectangular slot at the bottom of the channel steel 1, and the support column 8 can move within the slot. The junction of the chuck 12 and the measuring scale 9 can be the value to be measured, and the upper surface of the channel steel 1 can serve as a unified measurement reference surface. This technical solution improves the readability and visibility of the numerical values, thereby ensuring the accuracy of the readings.
[0026] Figure 5 A cross-sectional view of a support shaft 2 for measuring weld deformation of a tube sheet according to an exemplary embodiment of this disclosure is shown. In a preferred embodiment, the support shaft 2 can be machined into a stepped or convex cross-section. The width of the bottom of the support shaft 2 can be greater than the width of its top. This technical solution not only ensures the positioning of the support shaft 2, i.e., the support shaft 2 can only slide along the elongated slot, but also ensures that both sides of the support shaft 2 are subjected to uniform spring tension, which can improve the stress on the channel steel 1. Figure 6 A side view of an apparatus for measuring weld overlay deformation of a tube sheet according to an exemplary embodiment of this disclosure is shown. In a preferred embodiment, one end of the connecting rod 3 can be connected to one end of a corresponding support shaft 2. The plurality of springs 4 can be three Y-shaped springs 4, with the upper end of each Y-shaped spring 4 connected to the other end of a corresponding connecting rod 3, and the lower end of each Y-shaped spring 4 connected to the counterweight 5, ensuring that all springs 4 are under tension. The apparatus may also include a clamp, which, along with the springs 4, connecting rod 3, and support shaft 3, can fix the channel steel to the weld overlay 11 of the tube sheet. One end of the clamp can be connected to the lower part of the Y-shaped spring 4, and the other end can be connected to the counterweight 5. The position of the support shaft 2 can be adjusted so that the resultant force of the support shaft 2 and the clamp is in the vertical direction, thereby increasing the stability of the apparatus.
[0027] Compared with existing technologies, the technical solution disclosed herein solves the technical problem of inconsistent measurement standards and low accuracy in manual measurements. The technical solution disclosed herein provides a unified measurement standard, is easy to manufacture and use, improves measurement accuracy, and can meet the measurement requirements for weld deformation of various workpieces with different diameters and thicknesses. The device based on the technical solution disclosed herein is simple to operate and highly efficient during the measurement process.
[0028] It should be understood that the systems in the various embodiments provided in this disclosure can be combined, modified, and / or altered to form new technical solutions. Without inventive effort, these technical solutions should also be included within the scope of protection claimed in this disclosure.
[0029] Numerous specific examples are provided in the embodiments described herein, and it should be understood that these examples are for the purpose of elaborating on the embodiments of this disclosure in detail and are not intended to limit the scope of this disclosure. Embodiments in this disclosure can be practiced without these specific examples. In some embodiments, structures and / or techniques well known to those skilled in the art have not been shown in detail so as not to obscure the understanding of this disclosure.
[0030] While preferred embodiments of the present disclosure have been shown and described herein, it will be readily understood by those skilled in the art that these embodiments are provided by way of example only. Various changes, modifications, and substitutions will appear to those skilled in the art without departing from the present disclosure. It should be understood that various alternatives to the embodiments of the present disclosure described herein are optionally used to implement the present disclosure. The scope of the present disclosure is intended to be defined by the claims, and thereby to cover structures within the scope of those claims and their equivalents.
Claims
1. An apparatus for measuring the build-up deformation of a tube sheet, characterized by, Comprising of: a channel steel, having a rectangular slot at the bottom of the channel steel, and a first pair of long round hole slots at both sides of one end of the channel steel, and a second pair of long round hole slots at both sides of the other end of the channel steel; a pair of support shafts, one of which is placed in and can slide in the first pair of long round hole slots, and the other of which is placed in and can slide in the second pair of long round hole slots; a plurality of connecting rods, one end of each of which is connected to one end of the support shafts; a plurality of springs, one end of each of which is connected to the other end of the connecting rods; a plurality of counterweights, each of which is hung to the other end of the springs; a pair of slider nuts, each of which is embedded on and can slide along the rectangular slot; a pair of positioning studs, each of which is fixed with the slider nut through the through hole of the slider nut; a slider, which is embedded on and can slide along the rectangular slot; a support column, which is fixed with the slider through the through hole of the slider; a measuring scale, which is fixed on the surface of the support column; and a chuck, which is located at the top of the channel steel and can slide along the top of the channel steel. wherein the first pair of long round hole slots and the second pair of long round hole slots are in the same plane, which is parallel to the bottom plane of the channel steel.
2. The apparatus of claim 1, wherein, wherein the positioning studs and the support column are placed above the overlay of the tube sheet.
3. The apparatus of claim 1, wherein, wherein the pair of support shafts slide parallel to the rectangular slot.
4. The apparatus of claim 1, wherein, wherein the bottom end of the measuring scale is higher than the bottom end of the support column.
5. The apparatus of claim 1, wherein, wherein the gap between the support column and the rectangular slot is greater than the gap between the measuring scale and the rectangular slot.
6. The apparatus of claim 1, wherein, wherein the positioning studs and the slider nuts are threadedly fitted together, so that the slider nuts can move up and down relative to the positioning studs to fine-tune the height of the channel steel.
7. The apparatus of claim 1, wherein, wherein the chuck is fixed with the channel steel by welding, and has a slotted opening on it, which corresponds to the rectangular slot at the bottom of the channel steel, and the support column can move within the slotted opening, and the intersection of the chuck and the measuring scale is the value to be measured.
8. The apparatus of claim 1, wherein, wherein the measuring scale is made of steel plate.
9. The apparatus of claim 1, wherein,