A c-shaped heat transfer elbow detection system and an application method thereof

Abstract

The application discloses a C-shaped heat transfer elbow pipe detection system and an application method thereof. The system comprises a detection platform, a detection platform adjusting mechanism and a detection mechanism. The detection platform comprises a positioning detection table and two mobile detection tables arranged side by side on the positioning platform away from two sides. A plurality of clamping structures are arranged on the mobile detection platform and used for clamping the C-shaped heat transfer elbow pipe. The detection platform adjusting mechanism comprises a longitudinal adjusting device, a transverse adjusting device, a levelness adjusting device and a transverse driving device. The longitudinal adjusting device and the transverse adjusting device extend along the horizontal direction and are perpendicular to each other. The levelness adjusting device is arranged between the longitudinal adjusting device and the transverse adjusting device and is used for adjusting the levelness of the transverse adjusting device. The transverse driving device is arranged on the transverse adjusting device. The detection mechanism is used for detecting the size and shape of the C-shaped heat transfer elbow pipe. The application has the advantages of simple structure, simultaneous size and shape detection of the C-shaped heat transfer elbow pipe, and no damage to the appearance and surface of the C-shaped pipe.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipe system detection devices, and relates to a C-shaped heat transfer bend detection system and an application method thereof, in particular to a C-shaped heat transfer bend detection system for a steam generator and an application method thereof. Background Art

[0002] As a core component of a steam generator, heat transfer tubes are crucial for transferring heat from the primary circuit to the secondary circuit, achieving water vaporization. Their size and shape directly determine key parameters such as heat transfer area, flow resistance, thermal stress distribution, and vibration resistance. To ensure efficient heat transfer, operational safety and stability, and further extend equipment life, stringent requirements are placed on the size and shape accuracy of heat transfer tubes.

[0003] At present, the U-shaped structure design is commonly used in steam generator heat transfer tubes. This design has been widely used due to its advantages in space utilization and thermal expansion adaptability. In order to further improve the performance and reduce the backflow phenomenon of steam generators, a new type of C-shaped heat transfer tube has been proposed in recent years. Figure 8 Each steam generator tube bundle consists of two 90° elbows with the same bending radius + more than 100 pipes with different crossbeam lengths.

[0004] Traditionally, the dimensional and shape inspection of U-shaped heat transfer tubes uses a flat plate with a U-shaped groove cut into the bend area and a crossbeam approximately 50 mm adjacent to the tangent point. Using appropriate measuring tools, the dimensions (bend radius, distance between the two straight legs, crossbeam length) and shape (profile, flatness, etc.) of the bend are inspected. However, for C-shaped tubes, using a flat plate with a C-shaped groove is clearly unsuitable. The primary reason is that the long crossbeam significantly increases the difficulty of manufacturing large-scale plates. Furthermore, the large number of plates required for fabrication also results in high inspection costs. Using a flat plate with two 90° bends for bend radius inspection only requires two plates, making it convenient. However, the location of the bend tangent point cannot be determined, making it difficult to accurately measure the length of the straight legs, the distance between the two legs, and their flatness, making it difficult to meet inspection requirements. Therefore, developing more efficient and accurate inspection methods has become a key research focus. Utility model patents CN 204286270 U, "Bend Detection Platform," CN 206556566U, "A Bend Detection Platform," and CN 117739776 A, "A Tool for Detecting Railway Freight Car Brake Bends," are only suitable for contour testing of small bends. Since they cannot accurately locate the bend's intersection point, they cannot detect the length of the straight leg section, the distance between the two straight legs, or the flatness, and are therefore inapplicable. CN 118482765 A, "A Bend Detection Device," while capable of detecting the contour, bend radius, and distance between the two straight legs of a bend, cannot detect flatness. Furthermore, using this detection method, due to the unique shape of the C-shaped tube and the long crossbeam section, which can reach 3 meters or longer, the measurement process can easily cause deformation of the C-shaped tube, and the clamping position poses a risk of surface damage to the C-shaped tube. Summary of the Invention

[0005] To overcome the above-mentioned deficiencies in the prior art, the present invention provides a size and shape detection platform for C-shaped heat transfer tubes for steam generators. The detection system has a simple structure, does not cause deformation or surface damage to the C-shaped tubes, and can not only detect the contour, radius, and spacing between the two straight legs of the bent tubes, but also the flatness of the C-shaped bent tubes. The system is suitable for batch inspection of various types of bent tubes, and is particularly suitable for size and shape inspection of C-shaped tubes.

[0006] To solve the above problems, the technical solution adopted in this application is:

[0007] The present invention provides a C-shaped heat transfer bend detection system, comprising:

[0008] The detection platform includes a positioning detection platform and two movable detection platforms respectively arranged side by side on the left and right sides of the positioning detection platform. The movable detection plane is provided with a plurality of clamping structures for clamping the C-shaped heat transfer elbow.

[0009] The detection platform adjustment mechanism includes a longitudinal adjustment device, a transverse adjustment device, a level adjustment device, and a transverse drive device. The longitudinal adjustment device and the transverse adjustment device both extend in the horizontal direction and are perpendicular to each other. The level adjustment device is arranged between the longitudinal adjustment device and the transverse adjustment device and is used to adjust the level of the transverse adjustment device. The transverse drive device is arranged on the transverse adjustment device and connected to the mobile detection platform and is used to drive the two mobile detection platforms to move closer to or farther from each other in the transverse direction.

[0010] The detection mechanism is used to detect the size and shape of the C-shaped heat transfer elbow.

[0011] As a preferred embodiment of the present application, the C-shaped heat transfer bend includes a beam section and two straight leg sections, the two straight leg sections are connected to the beam section through two bend radius elbows, the bend radius elbows are 90° elbows, and the dimensions of the C-shaped heat transfer bend include at least the distance between the two straight leg sections and the length of the straight leg sections; the shape of the C-shaped heat transfer bend includes at least contour and flatness.

[0012] As a preferred embodiment of the present application, the positioning detection platform includes a positioning frame and a positioning detection plate disposed on the positioning frame, the positioning detection plate having a positioning plane; the mobile detection platform includes a mobile frame and a mobile detection plate disposed on the mobile frame, the mobile detection plate having a mobile detection plane, and the positioning plane and the mobile detection plane jointly define a detection surface. The positioning plane and the mobile detection plane of the present application are relatively independent, but the positioning plane and the mobile detection plane are always coplanar. The mobile detection plane can move left and right relative to the positioning plane under the drive of a transverse drive device, thereby adjusting the transverse length of the detection surface to accommodate C-shaped heat transfer bends of different lengths.

[0013] As a preferred embodiment of the present application, the longitudinal adjustment device includes a pair of longitudinal slide rails, which extend in the horizontal direction and are parallel to each other. Each longitudinal slide rail is respectively equipped with at least one longitudinal slider that is adapted to and movable along the longitudinal slide rail. The longitudinal slider is connected to the transverse adjustment device through the horizontality adjustment device for adjusting the longitudinal position of the transverse adjustment device.

[0014] As a preferred embodiment of the present application, the lateral adjustment device is located above the longitudinal adjustment device, and includes a pair of lateral slide rails, and multiple connecting beams are connected between the two lateral slide rails. The two lateral slide rails extend in the horizontal direction and are parallel to each other. At the same time, the lateral slide rails are perpendicular to the longitudinal slide rails. Each of the lateral slide rails is respectively equipped with at least two lateral sliders that are adapted to it and can move along the lateral slide rails, and the lateral sliders are connected to the mobile detection platform.

[0015] As a preferred embodiment of the present application, the horizontality adjustment device includes an upper connecting plate and a lower connecting plate arranged relatively to each other, the lower connecting plate is fixedly connected to the longitudinal slider, and an inclination adjustment component is provided on the lower connecting plate; the upper connecting plate is fixedly connected to the transverse adjustment device through a connecting column, and an inclination adjustment component for adjusting the inclination angle of the upper connecting plate is provided between the upper connecting plate and the lower connecting plate.

[0016] As a preferred embodiment of the present application, there are two sets of transverse drive devices, which are symmetrically arranged at the two ends of the transverse slide rail. Each set of the transverse drive devices includes a transverse screw and an adjustment nut. The transverse screw is rotatably arranged on the connecting beam through a support seat, and the adjustment nut is fixedly arranged on the mobile detection platform. The adjustment nut has a threaded hole for screwing with the transverse screw. When the length of the detection platform needs to be adjusted, it is only necessary to rotate the transverse screw. During the rotation of the transverse screw, the adjustment nut drives the transverse movement of the adjustment nut, thereby driving the transverse movement of the mobile detection platform fixed thereto, and then adjusting the transverse length of the entire detection platform to adapt to C-shaped heat transfer elbows with different beam lengths.

[0017] As a preferred embodiment of the present application, the plurality of clamping structures are divided into two groups, wherein: the first group of clamping structures are arranged at intervals in the transverse direction and are used to jointly clamp the crossbeam section of the C-shaped heat transfer bend; the second group of clamping structures on each of the mobile inspection platforms are arranged at intervals in the longitudinal direction, and the second groups of clamping structures on the two mobile inspection platforms correspond one to one and are aligned left and right in the transverse direction, and are used to respectively clamp the two straight leg sections of the C-shaped heat transfer bend.

[0018] As a preferred embodiment of the present application, the clamping structures have the same structure, and both include a guide rail arranged on a mobile detection platform, a sliding block slidingly arranged on the guide rail, and a clamping part arranged on the sliding block. The clamping part is provided with a clamping groove, and the bottom surface of each clamping groove is located on the same horizontal plane, and the clamping grooves jointly define a C-shaped clamping path, which is used to detect the shape of the C-shaped heat transfer bend.

[0019] As a preference of the present application, the clamping portion includes a clamping base and a clamping claw provided on the clamping base, the clamping base is fixedly provided on the sliding block; and a clamping groove is provided on the clamping claw.

[0020] As a preferred embodiment of the present application, the clamping groove is a rectangular open groove, which can facilitate the placement and removal of the C-shaped heat transfer elbow.

[0021] As a preference of the present application, the guide rails of the first group of clamping structures are arranged longitudinally, and the guide rails of the second group of clamping structures are arranged transversely.

[0022] The C-shaped heat transfer bend detection system of the present invention further includes a positioning adjustment mechanism for adjusting the position of each clamping structure.

[0023] As a preferred embodiment of the present application, the positioning adjustment mechanism includes a plurality of reference holes arranged on the positioning detection platform and spaced apart along the longitudinal direction, and a positioning detection reference block that can be detachably inserted into any reference hole on the positioning detection platform. The top of the positioning detection reference block is provided with a horizontal support plane and a vertical limit plane. When the positioning detection reference block is inserted into the reference hole, the horizontal support plane and the bottom surface of the clamping groove are located on the same horizontal plane.

[0024] The C-shaped heat transfer bend detection system of the present invention further includes a levelness detection mechanism disposed on the detection platform for detecting the levelness of the detection platform.

[0025] As a preferred embodiment of the present application, the levelness detection mechanism includes a connecting frame and a level meter disposed on the connecting frame. The level meter can conveniently detect the levelness of the detection surface.

[0026] As a preference of the present application, the detection mechanism can be a manual measuring device, such as a magnesium-aluminum straightedge, a feeler gauge, a length vernier caliper, etc., or it can be an automatic distance measuring device, such as a laser rangefinder, etc.

[0027] The present invention also provides an application method of the C-shaped heat transfer bend detection system, comprising the following steps:

[0028] Step 1: Install the two parallel longitudinal slide rails of the longitudinal adjustment device on a mounting surface, adjust the height and levelness of the detection platform by adjusting the detection platform adjustment mechanism, and ensure that the detection surface of the entire detection platform is in a horizontal state;

[0029] Step 2: Using a positioning mechanism, position the plurality of clamping structures on the mobile inspection platform. The centers of the clamping grooves of the first group of clamping structures are located on the same horizontal line, and the center lines of the guide rails of the two clamping structures of the second group, which are aligned horizontally, are located on the same vertical line, so that the plurality of clamping structures jointly define a clamping path for clamping the C-shaped heat transfer elbow.

[0030] Step 3: Based on the inner side spacing between the two straight leg sections of the C-shaped heat transfer elbow specified in the technical requirements, use the transverse drive device to adjust the positions of the two movable detection platforms, and use the positioning adjustment mechanism to adjust the position of the second set of clamping structures so that the minimum distance between the edge of one side of each clamping groove of the second set of clamping structures close to the positioning detection platform and the center of the positioning reference hole on the positioning detection platform with which they are laterally aligned is half the inner side spacing between the two straight leg sections;

[0031] Step 4: Place the C-shaped heat transfer bend to be tested in the clamping path. Determine whether the contour of the C-shaped heat transfer bend is qualified based on the placement of the C-shaped heat transfer bend. If the C-shaped heat transfer bend is placed in the clamping path in a free state, the contour of the C-shaped heat transfer bend is qualified; otherwise, it is unqualified. The free state of the C-shaped heat transfer bend is the state in which the C-shaped heat transfer bend is not subjected to any external force.

[0032] Step 5: Use a detection mechanism to obtain the dimensional data of the C-shaped heat transfer bend, and then calculate the straightness of the straight leg section of the C-shaped heat transfer bend, the parallelism of the two straight leg sections, and the flatness of the C-shaped heat transfer bend based on the dimensional data.

[0033] In step 5, the dimension data includes the gap between the straight leg section of the C-shaped heat transfer bend and the clamping grooves of each clamping structure, the maximum gap value between the C-shaped heat transfer bend and the detection plane, and the bend radius.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] 1. It can provide a large-area testing platform to facilitate the measurement of large-sized C-shaped heat transfer tubes, especially for C-shaped heat transfer tubes with long crossbeams;

[0036] 2. The size (the distance between the two straight legs and the length of the straight legs) and shape (the contour and flatness of the C-shaped heat transfer elbow) of the C-shaped heat transfer tube can be tested simultaneously, which is easy to operate.

[0037] 3. The two horizontal linear guide rails of the horizontal adjustment device and the horizontal screw of the horizontal drive device are mechanically connected to form a whole. This not only simplifies the power transmission, but also ensures that the positioning test platform and the mobile test platform of the testing platform are located on the same plane. The level gauge on the positioning test platform can then be used to ensure the levelness of the entire test surface.

[0038] 4. The distance between the two straight legs of the C-shaped tube and the length of the straight legs, which were originally difficult to measure, can be measured with the help of claws and feeler gauges, solving the problem of traditional measurement difficulties.

[0039] 5. The position of the clamping jaws can be adjusted on the detection platform to measure the size and shape of C-shaped bends with different bend radii and different beam lengths. It has a wide range of applications, convenient operation, high detection accuracy, and the actual measurement accuracy can reach ±0.1mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 FIG. 1 is a structural diagram of an embodiment of the present invention.

[0041] Figure 2 for Figure 1 A partial enlarged view of .

[0042] Figure 3It is a front view of an embodiment of the present invention.

[0043] Figure 4 It is a front view of an embodiment of the present invention.

[0044] Figure 5 It is a left side view of an embodiment of the present invention.

[0045] Figure 6 Schematic diagram of a clamping structure according to an embodiment of the present invention.

[0046] Figure 7 Schematic diagram of the structure of a positioning detection reference block according to an embodiment of the present invention.

[0047] Figure 8 It is a structural diagram of the C-type heat transfer tube bundle.

[0048] Figure 9 Schematic diagram of the measurement of the C-type heat transfer tube of the present invention.

[0049] Figure 10 Schematic diagram of the measurement of the straight leg section of the C-type heat transfer tube of the present invention.

[0050] In the attached figure:

[0051] 1-Detection platform; 11-Positioning detection platform; 111-Positioning frame; 112-Positioning detection plate; 12-Mobile detection platform; 121-Mobile frame; 122-Mobile detection plate; 13-Clamping structure; 131-Guide rail; 132-Sliding block; 133-Clamping portion; 1331-Clamping groove; 1332-Clamping base; 1333-Claw; 1334-Locking screw; 14-Positioning adjustment mechanism; 141-Reference hole; 142-Positioning detection reference block; 1421-Horizontal support plane; 1422-Vertical limit plane; 15-Levelness detection mechanism;

[0052] 2 - Detection platform adjustment mechanism; 21 - Longitudinal adjustment device; 211 - Longitudinal slide rail; 212 - Longitudinal slider; 22 - Transverse adjustment device; 221 - Transverse slide rail; 222 - Connecting beam; 223 - Transverse slider; 23 - Level adjustment device; 231 - Upper connecting plate; 232 - Lower connecting plate; 233 - Tilt adjustment assembly; 2331 - Vertical screw; 2332 - Vertical locking nut; 234 - Connecting column; 24 - Transverse drive device; 241 - Transverse screw; 242 - Adjustment nut; 243 - Support base;

[0053] 3-C-shaped heat transfer elbow; 31-crossbeam section; 32-straight leg section. DETAILED DESCRIPTION

[0054] The following describes the embodiments of the present application through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present application from the disclosure herein. The present application may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present application.

[0055] It should be noted that the process equipment or devices not specifically specified in the following embodiments are all conventional equipment or devices in the art.

[0056] In addition, it should be understood that one or more method steps mentioned in this application do not exclude the presence of other method steps before or after the combination step or the insertion of other method steps between these explicitly mentioned steps, unless otherwise specified; it should also be understood that the combination connection relationship between one or more devices / apparatuses mentioned in this application does not exclude the presence of other devices / apparatuses before or after the combination device / apparatus or the insertion of other devices / apparatuses between these two explicitly mentioned devices / apparatuses, unless otherwise specified. Moreover, unless otherwise specified, the numbering of each method step is merely a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or to define the scope of implementation of this application. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be considered as the scope of implementation of this application.

[0057] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0058] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0060] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" 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 application. In this specification, the illustrative expressions 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 suitable manner in any one or more embodiments or examples.

[0061] The present application will be further described below in conjunction with specific embodiments, but the scope of protection of the present application is not limited thereto.

[0062] like Figures 1 to 5 As shown, the present invention provides a C-shaped heat transfer bend detection system, comprising:

[0063] The inspection platform 1 includes a positioning inspection platform 11 and two movable inspection platforms 12 arranged side by side on the left and right sides of the positioning inspection platform 11. The movable inspection platform 12 is provided with a plurality of clamping structures 13 for clamping the crossbeam section 31 and the straight leg section 32 of the C-shaped heat transfer elbow 3.

[0064] The detection platform adjustment mechanism 2 includes a longitudinal adjustment device 21, a transverse adjustment device 22, a level adjustment device 23 and a transverse drive device 24. The longitudinal adjustment device 21 and the transverse adjustment device 22 extend in the horizontal direction and are perpendicular to each other. The level adjustment device 23 is arranged between the longitudinal adjustment device 21 and the transverse adjustment device 22 and is used to adjust the level of the transverse adjustment device 22. The transverse drive device 24 is arranged on the transverse adjustment device 22 and is used to drive the two mobile detection platforms 12 to move closer to or away from each other in the transverse direction.

[0065] The detection mechanism is used to detect the size and shape of the C-shaped heat transfer elbow.

[0066] like Figure 3As shown, the C-shaped heat transfer bend 3 includes a crossbeam section 31 and two straight leg sections 32. The two straight leg sections 32 are connected to the crossbeam section 31 through two elbows with a radius of 90°. The dimensions of the C-shaped heat transfer bend include at least the distance between the two straight leg sections and the length of the straight leg sections. The shape of the C-shaped heat transfer bend includes at least the contour and flatness.

[0067] like Figure 4 As shown, the positioning detection platform 11 includes a positioning frame 111 and a positioning detection plate 112 disposed on the positioning frame 111. The positioning detection plate 112 has a positioning plane. The mobile detection platform 12 includes a mobile frame 121 and a mobile detection plate 122 disposed on the mobile frame 121. The mobile detection plate 122 has a mobile detection plane. The positioning plane and the mobile detection plane together define a detection surface. The positioning plane is always coplanar with the mobile detection plane.

[0068] like Figure 1 and Figure 2 As shown, the longitudinal adjustment device 21 includes a pair of longitudinal slide rails 211, which extend in the horizontal direction and are parallel to each other. Each longitudinal slide rail 211 is respectively equipped with at least one longitudinal slider 212 that is adapted to and movable along the longitudinal slide rail 211. The longitudinal slider 212 is connected to the transverse adjustment device 22 through the horizontality adjustment device 23 for adjusting the longitudinal position of the transverse adjustment device 22.

[0069] like Figure 1 and Figure 2 As shown, the lateral adjustment device 22 is located above the longitudinal adjustment device 21, and includes a pair of lateral slide rails 221. A plurality of connecting beams 222 are connected between the two lateral slide rails 221. The two lateral slide rails 221 extend in the horizontal direction and are parallel to each other. At the same time, the lateral slide rails 221 and the longitudinal slide rails 211 are perpendicular to each other. Each of the lateral slide rails 221 is respectively equipped with at least two lateral sliders 223 that are adapted to and can move along the lateral slide rails 221. The lateral sliders 223 are connected to the mobile detection platform 12.

[0070] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, there are two sets of transverse drive devices 24, which are symmetrically arranged at the two ends of the transverse slide rail 221. Each set of the transverse drive device 24 includes a transverse screw 241 and an adjusting nut 242. The transverse screw 241 is rotatably set on the connecting beam 222 through a support seat 243. The adjusting nut 242 is fixedly set on the mobile detection platform 12. The adjusting nut 242 has a threaded hole for screwing with the transverse screw 241.

[0071] like Figure 4 and Figure 5 As shown, the horizontality adjustment device 23 includes an upper connecting plate 231 and a lower connecting plate 232 arranged opposite to each other, the lower connecting plate 232 is fixedly connected to the longitudinal slider 212, and the upper connecting plate 231 is fixedly connected to the transverse adjustment device 22 through a connecting column 234; an inclination adjustment component 233 is provided between the upper connecting plate 231 and the lower connecting plate 232 for adjusting the inclination angle of the upper connecting plate 231.

[0072] like Figure 5 As shown, there are four sets of tilt adjustment assemblies 233, two in a group, installed between the upper connecting plate 231 and the lower connecting plate 232. The tilt adjustment assemblies 233 include vertical screws 2331 and vertical locking nuts 2332. The lower ends of the vertical screws 2331 are connected to the lower connecting plate 232, and the upper ends of the vertical screws 2331 pass through the upper connecting plate 231 and screw together with the vertical locking nuts 2332. When the horizontality of the upper connecting plate 231 needs to be adjusted, this can be achieved by adjusting the tilt adjustment assemblies 233.

[0073] like Figure 1 and Figure 3 As shown, the multiple clamping structures 13 on each of the mobile inspection platforms 12 are divided into two groups, wherein: the first group of clamping structures 13 are arranged at intervals in the transverse direction and are used to jointly clamp the crossbeam section of the C-shaped heat transfer bend; the second group of clamping structures 13 on each of the mobile inspection platforms 12 are arranged at intervals in the longitudinal direction, and the second groups of clamping structures 13 on the two mobile inspection platforms 12 correspond to each other one by one and are aligned left and right in the transverse direction, and are used to respectively clamp the two straight leg sections of the C-shaped heat transfer bend.

[0074] like Figure 6 As shown, the clamping structure 13 has the same structure, including a guide rail 131 arranged on the mobile detection platform 12, a sliding block 132 slidably arranged on the guide rail 131, and a clamping portion 133 arranged on the sliding block 132, and the clamping portion 133 is provided with a clamping groove 1331, and the bottom surface of each clamping groove 1331 is located on the same horizontal plane, and the clamping grooves 1331 together define a C-shaped clamping path, which is used to detect the shape of the C-shaped heat transfer bend.

[0075] like Figure 6 As shown, the clamping portion 133 includes a clamping base 1332 and a clamping claw 1333 provided on the clamping base. The clamping base 1332 is fixedly provided on the sliding block 132 ; a clamping groove 1331 is provided on the clamping claw 1333 .

[0076] like Figure 6 As shown, the claw 1333 can be a bakelite claw, and a strip-shaped adjustment slot is provided on the claw 1333. The claw 1333 is mounted on the side of the clamping base 1332 by a positioning screw 1334. When the mounting position of the claw 1333 needs to be adjusted, the positioning screw 1334 is loosened, the claw 1333 is adjusted to the appropriate position, and then tightened. The whole operation is simple and quick.

[0077] like Figure 6 As shown, the clamping groove 1331 is a rectangular open groove, which can facilitate the placement and removal of the C-shaped heat transfer elbow.

[0078] like Figure 1 and Figure 3 As shown, the guide rails of the first group of clamping structures 13 are arranged in the longitudinal direction, and the guide rails of the second group of clamping structures 13 are arranged in the transverse direction.

[0079] like Figure 1 and Figure 3 As shown, the C-shaped heat transfer bend detection system of the present invention further includes a positioning adjustment mechanism 14 for adjusting the position of each of the clamping structures 13 .

[0080] like Figure 1 、 Figure 3 Figure 7 As shown, the positioning adjustment mechanism 14 includes a plurality of reference holes 141 arranged on the positioning detection platform 11 and spaced apart along the longitudinal direction, and a positioning detection reference block 142 that can be detachably inserted into any reference hole on the positioning detection platform 11. The top of the positioning detection reference block 142 is provided with a horizontal support plane 1421 and a vertical limit plane 1422. When the positioning detection reference block 142 is inserted into the reference hole 141, the horizontal support plane 1421 and the bottom surface of the clamping groove 1331 are located on the same horizontal plane.

[0081] like Figure 1 and Figure 3As shown, the number of reference holes 141 on the positioning and detection platform 11 is one more than the number of the second group of clamping structures 13 on each mobile detection platform. One reference hole 141 is used to adjust the position of the first group of clamping structures 13, and the remaining reference holes 141 are used to adjust the position of the second group of clamping structures 13. In this embodiment, the reference holes 141 on the positioning and detection platform 11 are described as four. They are named, from front to back, the first reference hole, the second reference hole, the third reference hole, and the fourth reference hole. The first reference hole, the second reference hole, the third reference hole, and the fourth reference hole are arranged in a longitudinal direction with a front-to-back spacing. The second reference hole, the third reference hole, the fourth reference hole, and the positioning and detection reference block 142 can adjust the position of the two clamping structures 13 on the left and right sides so that the center lines of the guide rails 131 of the two clamping structures 13 of the second group, which are aligned in the horizontal direction, are located on the same straight line in the longitudinal direction. The first reference hole and the positioning and detection reference block 142 can adjust the position of the first group of clamping structures 13 so that the centers of the clamping grooves 1331 of each clamping structure 13 of the first group are located on the same straight line in the horizontal direction.

[0082] like Figure 1 As shown, the C-shaped heat transfer bend detection system of the present invention further includes a levelness detection mechanism 15 disposed on the detection platform for detecting the levelness of the detection platform.

[0083] like Figure 1 As shown, the level detection mechanism 15 includes a connecting frame and a level meter arranged on the connecting frame. The level meter can be used to conveniently detect the levelness of the detection surface.

[0084] In some embodiments of the present invention, the detection mechanism may be a manual measuring device, such as a magnesium-aluminum straightedge, a feeler gauge, a length vernier caliper, etc., or an automatic distance measuring device, such as a laser rangefinder, etc.

[0085] The application method of the C-shaped heat transfer bend detection system of the present invention comprises the following steps:

[0086] Step 1: Install the two parallel longitudinal slide rails 211 of the longitudinal adjustment device 21 on a mounting surface, and adjust the height and levelness of the detection platform 1 by adjusting the detection platform adjustment mechanism 2 so that the detection surface of the detection platform 1 is in a horizontal state;

[0087] The height of the testing platform in this step is adjusted based on the height of the tester, typically within a range of 70-90 cm for ease of operation. To achieve this, the two longitudinal rails 211 of the longitudinal adjustment device 21 can be mounted on a vertically adjustable mounting surface. Adjusting the mounting surface adjusts the vertical height of the testing platform. During this adjustment process, attention should also be paid to the levelness detection mechanism 15 (a level ruler is used in this embodiment) on the testing platform to ensure that the entire testing platform is level.

[0088] Step 2: Use the positioning adjustment mechanism 14 to position the multiple clamping structures 13 on the mobile inspection platform 12. The centers of the clamping grooves 1331 of the clamping structures 13 of the first group are located on the same horizontal line, and the center lines of the guide rails 131 of the two clamping structures 13 of the second group, which are aligned horizontally, are located on the same vertical line. The multiple clamping structures jointly define a clamping path for clamping the C-shaped heat transfer elbow.

[0089] Step 3: Based on the theoretical inner spacing (DX) mm between the two straight legs of the C-shaped heat transfer bend specified in the technical requirements, use the transverse drive device 24 to adjust the position of the movable inspection platform 1, and use the positioning adjustment mechanism 14 to adjust the position of each clamping structure 13 of the second group so that the minimum distance between the clamping groove 1331 of the second group of clamping structures 13 and the positioning reference hole is (DX) / 2 mm. The minimum distance between the clamping groove 1331 and the positioning reference hole is the distance between the edge of the clamping groove 1331 closest to the positioning inspection platform 11 and the center of the positioning reference hole. D is the distance between the inner walls of the two straight legs (i.e., the length of the crossbeam section of the C-shaped heat transfer bend), in mm, and X is the tolerance for the inner spacing between the two straight legs, in mm.

[0090] Step 4: Place the C-shaped heat transfer bend to be tested in the clamping path. Determine whether the contour of the C-shaped heat transfer bend is qualified based on the placement of the C-shaped heat transfer bend. If the C-shaped heat transfer bend is placed in the clamping path in a free state, the contour of the C-shaped heat transfer bend is unqualified; otherwise, it is qualified. The free state of the C-shaped heat transfer bend is the state in which the C-shaped heat transfer bend is not subjected to any external force.

[0091] Step 5: Use a detection mechanism to detect the dimensional data of the C-shaped heat transfer bend, and then calculate the straightness of the straight leg section of the C-shaped heat transfer bend, the parallelism of the two straight leg sections, the flatness of the C-shaped heat transfer bend, and the length of the straight leg section of the C-shaped heat transfer bend based on the dimensional data; the dimensional data at least includes the gap between the straight leg section of the C-shaped heat transfer bend and the clamping groove 1331 of each clamping structure 13, the maximum gap value between the C-shaped heat transfer bend and the detection plane, the length from the crossbeam of the C-shaped heat transfer bend to the two tube ends, and the bend radius.

[0092] Step 2: Positioning the plurality of clamping structures 13 on the mobile detection platform 12 using the positioning adjustment mechanism 14 so that the centers of the clamping grooves 1331 of the first group of clamping structures 13 are on the same straight line in the transverse direction, by the following steps:

[0093] Place the positioning detection reference block in the first reference hole of the middle detection platform base plate, and place the magnesium-aluminum ruler stably on the reference block;

[0094] Rotate the positioning detection reference block so that the magnesium-aluminum ruler is in a transversely horizontal state, and then adjust the positions of the clamping structures on the mobile detection platforms on both sides so that the centers of the clamping grooves 1331 of the first group of clamping structures 13 are on the same straight line in the transverse direction, to ensure the high straightness of the beam section of the C-shaped heat transfer elbow pipe.

[0095] Step 2: Positioning the plurality of clamping structures 13 on the mobile detection platform 12 using the positioning adjustment mechanism 14 so that the centers of the clamping grooves 1331 of the first group of clamping structures 13 are on the same straight line in the transverse direction, by the following steps:

[0096] Place the positioning detection reference block in the first reference hole of the middle detection platform base plate, and place the magnesium-aluminum ruler stably on the reference block;

[0097] Place the magnesium-aluminum ruler on the top of the positioning detection reference block. Since the top of the positioning detection reference block is stepped, the magnesium-aluminum ruler can be attached to the horizontal support plane 1421 and the vertical limiting plane 1422, ensuring the accuracy of the placement position of the magnesium-aluminum ruler;

[0098] Rotate the positioning detection reference block so that the magnesium-aluminum ruler is parallel to the guide rails on both sides. At this time, it can be ensured that the center lines of the guide rails 131 of the second group of two clamping structures 13 aligned in the transverse direction are on the same straight line in the longitudinal direction, and the entire detection platform is in a horizontal state.

[0099] Step 3: According to the inner side distance (D-X) mm of the two straight leg sections of the C-shaped heat transfer elbow pipe specified in the technical requirements, adjust the position of the mobile detection platform 1 using the transverse driving device 24, by the following method:

[0100] Adjust the left mobile detection platform 12 to a rough position;

[0101] Insert the positioning detection reference block into the second reference hole;

[0102] Place the length vernier caliper on the positioning detection reference block;

[0103] Rotate the positioning detection reference block so that the length vernier caliper is perpendicular to the guide rails of the second group of clamping structures;

[0104] Loosen the positioning screw 1334 and fine-tune the position of the clamping jaw. Adjust the minimum distance between the right edge of the rectangular groove of the clamping jaw and the center of the second reference hole to (DX) / 2 mm. Tighten the positioning screw 1334. The position adjustment of the clamping groove 1331 is now complete.

[0105] Repeat the same steps until the positions of the clamping slots 1331 of the three clamping structures 13 on the left side mobile detection platform 1 are adjusted.

[0106] Taking a C-shaped heat transfer elbow used in a steam generator as an example for testing, the dimensional data measured by feeler gauges in the application method include the gap between the straight leg section of the C-shaped heat transfer elbow and the clamping groove 1331 of each clamping structure 13. The measured gaps between the clamping groove and the inner sides of the two straight legs of the C-shaped heat transfer elbow are X1, X2, X3, and Y1, Y2, Y3, respectively. The actual spacing between the two straight legs of the C-shaped heat transfer elbow is (DX) + max {(X1+Y1), (X2+Y2), (X3+Y2)}; wherein X1, X2, X3 are the inner gaps of one straight leg section, and Y1, Y2, Y3 are the inner gaps of the other straight leg section.

[0107] The straightness of the two straight leg segments is max (X1, X2, X3)-min (X1, X2, X3) and max (Y1, Y2, Y3)-min (Y1: Y2: Y3);

[0108] The parallelism of the two straight leg segments is |max (X1, X2, X3)-min (X1, X2, X3)-{max (Y1, Y2, Y3)-min(Y1, Y2, Y3)}|;

[0109] Measure the length A of the straight leg (in mm) and calculate the C value (in mm) of the C-shaped heat transfer elbow according to the formula C=A+R, where R is the radius of the 90° elbow (in mm).

[0110] Use a feeler gauge to measure the maximum gap between the C-shaped heat transfer bend and the detection plane. This value is the flatness of the C-shaped heat transfer bend.

[0111] Figure 9 In the equation, S is the wall thickness of the C-shaped heat transfer elbow (in mm), E is the diameter of the C-shaped heat transfer elbow (in mm), and B is the distance between the two straight legs, B=D+2R, in mm. Figure 10As shown, each time a group of C-shaped heat transfer bends is adjusted, a vernier caliper is first used to measure the length h1 from the clamping groove of the crossbeam section to the lowest clamping structure on the mobile inspection platform. Each time a C-shaped bend is inspected, it is only necessary to measure the length h2 from the tube end to the same lowest clamping structure on the mobile inspection platform. Then, a feeler gauge is used to measure the gap h3 between the C-shaped heat transfer bend and the clamping groove at the crossbeam. The straight leg length A is then calculated as h1+h2-h3-RE / 2.

[0112] The bend radius can be tested using a flat plate with a 90° elbow cut out. Only one plate is needed. The above method was used to test a C-shaped heat transfer bend, and the evaluation data are shown in Table 1.

[0113] Table 1

[0114]

[0115] Note: A1 and A2 represent the lengths of the two straight leg sections of the C-shaped heat transfer elbow, in mm; △A is the length difference between the two straight leg sections, in mm.

[0116] This application provides a large-area testing platform for convenient measurement of large-sized C-shaped heat transfer tubes, especially those with long crossbars. By adjusting the jaw position on the testing platform, the platform can be adapted to measure the size and shape of C-shaped bends with different bend radii and crossbar lengths. This platform offers a wide range of applications, convenient operation, and high testing accuracy, with a measurement accuracy of ±0.1mm. Furthermore, it can also accommodate other flat tube shapes.

[0117] The above examples are for the purpose of illustrating the embodiments disclosed in the present application and are not to be construed as limiting the present application. In addition, the various modifications listed herein and the variations of the methods and compositions in the invention will be apparent to those skilled in the art without departing from the scope and spirit of the present application. Although the present application has been specifically described with reference to various specific preferred embodiments of the present application, it should be understood that the present application should not be limited to these specific embodiments. In fact, various modifications apparent to those skilled in the art as described above to obtain the invention will fall within the scope of the present application.

Claims

1. A C-shaped heat transfer bend detection system, characterized in that: include: The detection platform (1) comprises a positioning detection platform (11) and two movable detection platforms (12) arranged side by side on the left and right sides of the positioning detection platform (11) and separated from each other. The movable detection platform (12) is provided with a plurality of clamping structures (13) for clamping the C-shaped heat transfer elbow (3). The detection platform adjustment mechanism (2) comprises a longitudinal adjustment device (21), a transverse adjustment device (22), a level adjustment device (23) and a transverse drive device (24), wherein the longitudinal adjustment device (21) and the transverse adjustment device (22) both extend in the horizontal direction and are perpendicular to each other; the level adjustment device (23) is arranged between the longitudinal adjustment device (21) and the transverse adjustment device (22) and is used to adjust the level of the transverse adjustment device (22); the transverse drive device (24) is arranged on the transverse adjustment device (22) and is connected to the movable detection The invention relates to a measuring platform (12) connected to the measuring platform (12), and used for driving the two movable measuring platforms (12) to move closer to or farther from each other in the horizontal direction; wherein the longitudinal adjustment device (21) includes a pair of longitudinal slide rails (211), the longitudinal slide rails (211) extend in the horizontal direction and are parallel to each other, and each longitudinal slide rail (211) is respectively equipped with at least one longitudinal slider (212) adapted thereto and movable along the longitudinal slide rail (211), and the longitudinal slider (212) is connected to the transverse adjustment device (22) through the level adjustment device (23), and is used for adjusting the transverse adjustment device (22) longitudinal position; the horizontal adjustment device (23) comprises an upper connecting plate (231) and a lower connecting plate (232) arranged opposite to each other, the lower connecting plate (232) is fixedly connected to the longitudinal slider (212), and the upper connecting plate (231) is fixedly connected to the transverse adjustment device (22) through a connecting column (234); an inclination adjustment component (233) for adjusting the inclination angle of the upper connecting plate (231) is provided between the upper connecting plate (231) and the lower connecting plate (232); the transverse adjustment device (22) is located at A pair of transverse slide rails (221) are provided above the longitudinal adjustment device (21), a plurality of connecting beams (222) are connected between the two transverse slide rails (221), the two transverse slide rails (221) extend in a horizontal direction and are parallel to each other, and the transverse slide rails (221) and the longitudinal slide rails (211) are perpendicular to each other, and each transverse slide rail (221) is provided with at least two transverse sliders (223) adapted to and movable along the transverse slide rails (221), and the transverse sliders (223) are connected to the mobile detection platform (12); and The detection mechanism is used for detecting the size and shape of the C-shaped heat transfer elbow (3).

2. The C-shaped heat transfer bend detection system according to claim 1, characterized in that: The positioning detection platform (11) comprises a positioning frame (111) and a positioning detection plate (112) arranged on the positioning frame (111), wherein the positioning detection plate (112) has a positioning plane; the mobile detection platform (12) comprises a mobile frame (121) and a mobile detection plate (122) arranged on the mobile frame (121), wherein the mobile detection plate (122) has a mobile detection plane, and the positioning plane and the mobile detection plane jointly define a detection surface.

3. The C-shaped heat transfer bend detection system according to claim 1, characterized in that: There are two sets of the transverse driving devices (24), which are symmetrically arranged at the two ends of the transverse slide rail (221). Each set of the transverse driving devices (24) includes a transverse screw (241) and an adjusting nut (242). The transverse screw (241) is rotatably arranged on the connecting beam (222) through a support seat (243). The adjusting nut (242) is fixedly arranged on the mobile detection platform (12). The adjusting nut (242) has a threaded hole for screwing with the transverse screw (241).

4. The C-shaped heat transfer bend detection system according to claim 1, characterized in that: The plurality of clamping structures (13) on each of the movable inspection platforms (12) are divided into two groups, wherein: the first group of clamping structures (13) are arranged at intervals in the transverse direction and are used to jointly clamp the crossbeam section of the C-shaped heat transfer bend; the second group of clamping structures (13) on each of the movable inspection platforms (12) are arranged at intervals in the longitudinal direction, and the second groups of clamping structures (13) on the two movable inspection platforms (12) correspond to each other one by one and are aligned left and right in the transverse direction, and are used to respectively clamp the two straight leg sections of the C-shaped heat transfer bend.

5. The C-shaped heat transfer bend detection system according to claim 4, characterized in that: The clamping structures (13) have the same structure, and both include a guide rail (131) arranged on the mobile detection platform (12), a sliding block (132) slidably arranged on the guide rail (131), and a clamping portion (133) arranged on the sliding block (132). The clamping portion (133) is provided with a clamping groove (1331). The bottom surface of each clamping groove (1331) is located on the same horizontal plane, and the clamping grooves (1331) jointly define a C-shaped clamping path, and the clamping path is used to detect the shape of the C-shaped heat transfer elbow.

6. The C-shaped heat transfer bend detection system according to claim 1, characterized in that: It also includes a positioning adjustment mechanism (14) for adjusting the position of each of the clamping structures (13).

7. An application method of the C-shaped heat transfer bend detection system according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Install two mutually parallel longitudinal slide rails (211) of the longitudinal adjustment device (21) on a mounting surface, and adjust the height and levelness of the detection platform (1) by adjusting the detection platform adjustment mechanism (2) so that the detection surface of the detection platform (1) is in a horizontal state; Step 2: Using a positioning adjustment mechanism (14), the plurality of clamping structures (13) on the mobile detection platform (12) are positioned so that the centers of the clamping grooves (1331) of the clamping structures (13) of the first group are located on the same straight line in the transverse direction, and the center lines of the guide rails (131) of the two clamping structures (13) aligned in the transverse direction in the second group are located on the same straight line in the longitudinal direction, so that the plurality of clamping structures jointly define a clamping path for clamping the C-shaped heat transfer elbow; Step 3: According to the inner side spacing of the two straight leg sections of the C-shaped heat transfer elbow specified in the technical requirements, the position of the mobile detection platform (1) is adjusted using the transverse drive device (24), and the position of the second group of clamping structures (13) is adjusted using the positioning adjustment mechanism (14) so ​​that the minimum distance between the clamping groove (1331) of the second group of clamping structures (13) and the positioning reference hole is half of the inner side spacing of the two straight leg sections; Step 4: Place the C-shaped heat transfer bend to be tested in the clamping path. Determine whether the contour of the C-shaped heat transfer bend is qualified based on the placement of the C-shaped heat transfer bend. If the C-shaped heat transfer bend is placed in the clamping path in a free state, the contour of the C-shaped heat transfer bend is qualified; otherwise, it is unqualified. The free state of the C-shaped heat transfer bend is the state in which the C-shaped heat transfer bend is not subjected to any external force. Step 5: Use a detection mechanism to detect the dimensional data of the C-shaped heat transfer bend, and then calculate the straightness of the straight leg section of the C-shaped heat transfer bend, the parallelism of the two straight leg sections, the flatness of the C-shaped heat transfer bend, and the length of the straight leg section of the C-shaped heat transfer bend based on the dimensional data.

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