A turnover structure of a polishing tool for a heat exchanger tube plate

Abstract

The utility model relates to a kind of overturning structure of heat exchanger tube plate polishing frock, overturning support, two positioning assemblies for positioning circular tube plate are arranged on the overturning support and present left-right symmetry distribution, the positioning assembly includes support component rotationally installed on overturning support.This overturning structure of heat exchanger tube plate polishing frock realizes the self-adaptive centering function of V-shaped clamping plate, ensures that the reference position of tube plate is consistent before and after turning over, avoids double-sided processing deviation, significantly improves the coaxiality and flatness of tube plate double-sided polishing, and the combination design of lifting component and elastic piece effectively disperses tube plate weight, avoids the edge deformation caused by excessive clamping force of tube plate, and when turning over is completed, electric push rod retracts, lifting frame is automatically reset under the action of elastic piece, reduces unnecessary operation process, further improves the efficiency of heat exchanger tube plate processing, and by adjusting the stroke of linear driver, different diameter tube plate can be adapted.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger manufacturing technology, specifically to a flipping structure for a heat exchanger tube sheet grinding fixture. Background Technology

[0002] Heat exchanger production includes processes such as tube bundle processing, shell and flange processing, plate heat exchanger plate processing, assembly and sealing, surface treatment and coating, and performance testing. Among these processes, the heat exchanger tube sheet is the core component of the shell-and-tube heat exchanger. It is disc-shaped and has several through holes inside that connect the pipes and the shell. The tube sheet plays a crucial role in fixing the heat exchange tubes, separating the shell-side and tube-side media, and ensuring the sealing performance of the equipment. Tube sheet processing includes steps such as blank preparation, rough machining, hole system machining, sealing surface machining, and subsequent processing and treatment. When performing surface grinding, it is usually necessary to use the fixtures on the grinding tool to fix the tube sheet, and then use the grinding mechanism to grind the tube sheet.

[0003] Common grinding fixtures consist of a control system, a grinding structure, and a positioning structure. During the tube sheet processing, symmetrical clamps are used to fix the tube sheet, and then the rotating grinding wheel is controlled to grind the tube sheet.

[0004] However, in actual operation, the tube sheet is clamped by a fixture, and then the fixture and tube sheet are flipped by a drive component. Since the flipped tube sheet is suspended in the air and has its own gravity, the clamping force required is large, which can easily cause the tube sheet to deform. Therefore, a flipping structure for heat exchanger tube sheet grinding fixture is proposed to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a flipping structure for a heat exchanger tube sheet grinding fixture, which has the advantages of quick and stable flipping. It solves the problem that in actual operation, after one side of the tube sheet is ground, the operator needs to release the clamp and flip the tube sheet, and then re-clamp the tube sheet with the clamp, which not only makes the flipping operation troublesome, but also affects the efficiency of tube sheet grinding.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flipping structure for a heat exchanger tube sheet grinding fixture, including a flipping bracket, on which two positioning components are arranged symmetrically on the left and right for positioning the circular tube sheet;

[0007] The positioning assembly includes a support component rotatably mounted on a flipping bracket, a clamping component for clamping a circular tube sheet slidably mounted on the support component, a lifting component for lifting the circular tube sheet to flip over, and a propulsion component for controlling the operation of the lifting component on the support component.

[0008] The clamping component includes a V-shaped clamping plate, a support plate and two guide rods are fixedly installed on one side of the V-shaped clamping plate, and a linear actuator for controlling the movement of the V-shaped clamping plate is fixedly installed on the support component, and the telescopic end of the linear actuator is fixedly connected to the support plate.

[0009] The lifting component includes a lifting frame that is slidably mounted on the outer surfaces of the support plate and two guide rods. Two elastic elements are fixedly installed between the lifting frame and the support component, and the two elastic elements are respectively sleeved on the two guide rods.

[0010] The propulsion component includes an electric push rod that is fixedly installed on the support component, and the telescopic end of the electric push rod is fixedly connected to a U-shaped plate for pushing the lifting frame to move.

[0011] Furthermore, the supporting component includes a supporting frame, a connecting column is fixedly connected to one side of the supporting frame, and the connecting column is rotatably installed with the flip bracket. The supporting frame is provided with a connecting groove and two guide grooves, and the connecting groove is slidably connected to the supporting plate, and the guide groove is slidably connected to the guide rod.

[0012] Furthermore, the elastic element includes a spring and two washers. The two washers are fixedly connected to the lifting frame and the support frame, respectively. Both ends of the spring are fixedly connected to the two washers, and the spring and the two washers are sleeved on the outer surface of the guide rod.

[0013] Furthermore, the flipping bracket is provided with a drive component for controlling the rotation of the positioning component. The drive component includes a servo motor fixedly mounted on the flipping bracket, and the output shaft of the servo motor is fixedly connected to the connecting column.

[0014] Furthermore, the flipping bracket is provided with a lifting platform assembly for placing the circular tube plate. The lifting platform assembly includes a grinding table slidably installed on the flipping bracket and a cylinder fixedly installed on the flipping bracket, and the telescopic end of the cylinder is fixedly connected to the grinding table.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] The flipping structure of this heat exchanger tube sheet grinding fixture, through the installation of positioning components, achieves self-centering functionality using V-shaped clamps to ensure consistent reference positions of the tube sheet before and after flipping, avoiding double-sided processing deviations and significantly improving the coaxiality and flatness of the tube sheet during double-sided grinding. Furthermore, the combined design of the lifting components and elastic elements effectively distributes the weight of the tube sheet, preventing edge deformation due to excessive clamping force. After flipping, the electric push rod retracts, and the lifting frame automatically resets under the action of the elastic elements, reducing unnecessary operational steps and further improving the efficiency of heat exchanger tube sheet processing. Moreover, by adjusting the stroke of the linear actuator, it can adapt to tube sheets of different diameters, and the modular design facilitates quick replacement of V-shaped clamps, meeting the needs of mixed-line production of multiple tube sheet specifications. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is an enlarged view of the structural positioning component of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the present utility model. Figure 2 Side view;

[0020] Figure 4 This is a schematic diagram of the structural support component of this utility model;

[0021] Figure 5 This is a schematic diagram showing the connection between the clamping component and the lifting component of this utility model.

[0022] Figure 6 This is an exploded view of the structural positioning component and the lifting component of this utility model.

[0023] In the diagram: 1. Tilting bracket; 2. Drive assembly; 3. Positioning assembly; 31. Support component; 311. Support frame; 312. Connecting column; 313. Connecting groove; 314. Guide groove; 32. Clamping component; 321. V-shaped clamping plate; 322. Support plate; 323. Guide rod; 33. Lifting component; 331. Lifting frame; 332. Elastic element; 34. Pushing component; 341. Electric push rod; 342. U-shaped plate; 35. Linear driver; 4. Lifting platform assembly. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1-6 The flipping structure of a heat exchanger tube sheet grinding fixture in this embodiment includes a flipping bracket 1, on which two positioning components 3 are arranged symmetrically on the left and right for positioning the circular tube sheet.

[0026] Example 2: Please refer to Figure 1-6 Based on Embodiment 1, the positioning component 3 includes a support component 31 rotatably mounted on the flipping bracket 1, a clamping component 32 for clamping the circular tube sheet is slidably mounted on the support component 31, a lifting component 33 for lifting the circular tube sheet to flip over is provided on the clamping component 32, and a pushing component 34 for controlling the operation of the lifting component 33 is provided on the support component 31.

[0027] The clamping component 32 includes a V-shaped clamping plate 321. The self-centering function of the V-shaped clamping plate 321 ensures that the reference position of the tube sheet is consistent before and after the flipping. A support plate 322 and two guide rods 323 are fixedly installed on one side of the V-shaped clamping plate 321. A linear actuator 35 for controlling the movement of the V-shaped clamping plate 321 is fixedly installed on the support component 31, and the telescopic end of the linear actuator 35 is fixedly connected to the support plate 322.

[0028] The lifting component 33 includes a lifting frame 331 that is slidably mounted on the outer surface of the support plate 322 and two guide rods 323. Two elastic elements 332 are fixedly installed between the lifting frame 331 and the support component 31, and the two elastic elements 332 are respectively sleeved on the two guide rods 323. The combined design of the lifting component 33 and the elastic elements 332 effectively distributes the weight of the tube sheet and avoids the tube sheet from deforming at the edges due to excessive clamping force.

[0029] The propulsion component 34 includes an electric push rod 341 fixedly mounted on the support component 31. The telescopic end of the electric push rod 341 is fixedly connected to a U-shaped plate 342 for pushing the lifting frame 331 to move.

[0030] The support component 31 includes a support frame 311, with a connecting column 312 fixedly connected to one side of the support frame 311. The connecting column 312 is rotatably installed with the flip bracket 1. The support frame 311 has a connecting groove 313 and two guide grooves 314. The connecting groove 313 is slidably connected to the support plate 322, and the guide grooves 314 are slidably connected to the guide rod 323. The cooperation between the guide grooves 314 and the guide rod 323, and the connecting grooves 313 and the support plate 322, ensures the stability and accuracy of the movement of the V-shaped clamp 321.

[0031] In addition, the elastic element 332 includes a spring and two washers. The two washers are fixedly connected to the lifting frame 331 and the support frame 311 respectively. The two ends of the spring are fixedly connected to the two washers respectively. The spring and the two washers are both sleeved on the outer surface of the guide rod 323. After the pushing component 34 is reset, the stretched spring contracts and drives the support frame 311 to reset.

[0032] Using the above technical solution, the linear actuators 35 in the two symmetrically distributed positioning components 3 push the V-shaped clamps 321 to move towards each other, clamping the edges of the tube sheet from both sides. The electric push rod 341 drives the U-shaped plate 342 to push the lifting frame 331 to slide along the guide rod 323 towards the tube sheet. The lifting frame 331 contacts and fits onto the tube sheet. The driving component 2 drives the connecting column 312 to rotate, so that the entire support component 31, together with the clamped tube sheet, rotates synchronously by 180 degrees.

[0033] Example 3: Please refer to Figure 1-6 Based on Embodiment 2, the flipping bracket 1 is provided with a drive assembly 2 for controlling the rotation of the positioning assembly 3. The drive assembly 2 includes a servo motor fixedly installed on the flipping bracket 1, and the output shaft of the servo motor is fixedly connected to the connecting column 312. The flipping bracket 1 is provided with a lifting platform assembly 4 for placing the circular tube plate. The lifting platform assembly 4 includes a grinding table slidably installed on the flipping bracket 1 and a cylinder fixedly installed on the flipping bracket 1, and the extension end of the cylinder is fixedly connected to the grinding table.

[0034] Using the above technical solution, the servo motor in the drive component 2 drives the connecting column 312 to rotate, so that the entire support component 31 and the clamped tube plate are rotated 180 degrees synchronously. The circular tube plate can be adjusted up and down through the lifting platform component 4 to achieve the supported state and the suspended state of the tube plate.

[0035] The working principle of the above embodiments is as follows:

[0036] The flipping structure of the heat exchanger tube sheet grinding fixture allows the circular tube sheet to be raised to the working height via the lifting platform assembly 4 during use. The linear actuators 35 in the two symmetrically distributed positioning assemblies 3 push the V-shaped clamps 321 to move towards each other, clamping the tube sheet edges from both sides. The V-shaped structure design ensures that the tube sheet is automatically centered, avoiding clamping offset caused by irregular edges.

[0037] When it is necessary to flip the tube, the electric push rod 341 drives the U-shaped plate 342 to push the lifting frame 331 to slide along the guide rod 323 towards the tube plate. The lifting frame 331 contacts and fits onto the tube plate, while the elastic element 332 provides cushioning to prevent rigid contact from damaging the surface of the tube plate. Then, the lifting platform assembly 4 is controlled to descend.

[0038] The servo motor in the drive assembly 2 drives the connecting column 312 to rotate, causing the entire support component 31 and the clamped tube plate to rotate synchronously by 180 degrees. The lifting frame 331 always maintains support for the tube plate, avoiding slippage or shaking due to gravity during the rotation process. After the rotation is completed, the electric push rod 341 retracts, and the lifting frame 331 resets under the action of the elastic element 332.

[0039] After the flipping is completed, the electric push rod 341 retracts, the lifting frame 331 resets under the action of the elastic element 332, and the lifting platform assembly 4 rises to the working height to stably support the tube sheet.

[0040] 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.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flipping structure for a heat exchanger tube sheet grinding fixture, comprising a flipping support (1), characterized in that: The flipping bracket (1) is provided with two positioning components (3) that are symmetrically distributed on the left and right and used to position the circular tube plate. The positioning component (3) includes a support component (31) rotatably mounted on the flipping bracket (1), a clamping component (32) for clamping a circular tube sheet is slidably mounted on the support component (31), a lifting component (33) for lifting the circular tube sheet to flip it over is provided on the clamping component (32), and a pushing component (34) for controlling the operation of the lifting component (33) is provided on the support component (31). The clamping component (32) includes a V-shaped clamping plate (321), a support plate (322) and two guide rods (323) are fixedly installed on one side of the V-shaped clamping plate (321), and a linear driver (35) for controlling the movement of the V-shaped clamping plate (321) is fixedly installed on the support component (31), and the telescopic end of the linear driver (35) is fixedly connected to the support plate (322); The lifting component (33) includes a lifting frame (331) that is slidably mounted on the outer surface of the support plate (322) and two guide rods (323). Two elastic elements (332) are fixedly installed between the lifting frame (331) and the support component (31), and the two elastic elements (332) are respectively sleeved on the two guide rods (323). The propulsion component (34) includes an electric push rod (341) fixedly mounted on the support component (31), and the telescopic end of the electric push rod (341) is fixedly connected to a U-shaped plate (342) for pushing the lifting frame (331) to move.

2. The flipping structure of the heat exchanger tube sheet grinding fixture according to claim 1, characterized in that: The support component (31) includes a support frame (311), a connecting column (312) is fixedly connected to one side of the support frame (311), and the connecting column (312) is rotatably installed with the flip bracket (1). The support frame (311) is provided with a connecting groove (313) and two guide grooves (314), and the connecting groove (313) is slidably connected to the support plate (322), and the guide grooves (314) are slidably connected to the guide rod (323).

3. The flipping structure of the heat exchanger tube sheet grinding fixture according to claim 2, characterized in that: The elastic element (332) includes a spring and two washers. The two washers are fixedly connected to the lifting frame (331) and the support frame (311) respectively. The two ends of the spring are fixedly connected to the two washers respectively, and the spring and the two washers are sleeved on the outer surface of the guide rod (323).

4. The flipping structure of the heat exchanger tube sheet grinding fixture according to claim 1, characterized in that: The flipping bracket (1) is provided with a drive assembly (2) for controlling the rotation of the positioning assembly (3). The drive assembly (2) includes a servo motor fixedly installed on the flipping bracket (1), and the output shaft of the servo motor is fixedly connected to the connecting column (312).

5. The flipping structure of a heat exchanger tube sheet grinding fixture according to claim 1, characterized in that: The flipping bracket (1) is provided with a lifting platform assembly (4) for placing a circular tube plate. The lifting platform assembly (4) includes a grinding table that is slidably installed on the flipping bracket (1) and a cylinder that is fixedly installed on the flipping bracket (1), and the telescopic end of the cylinder is fixedly connected to the grinding table.

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