A cylinder workpiece positioning structure for chemical equipment production
By controlling the movement of the hexagonal sleeve with an electric push rod and the flexible contact of the rubber roller, the problems of local deformation and axial misalignment of the cylinder are solved, achieving uniform positioning and stable support, ensuring a gapless fit between the cylinder and the end cap, and improving assembly accuracy.
Patent Information
- Application Number
- CN202521969088.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-12
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-12
AI Technical Summary
In the existing technology, when the V-block and the positioning ring are used to fix a thin cylinder, it causes local deformation and axial displacement of the cylinder, making it difficult to ensure that the cylinder and the end cap mating surface fit together. In addition, uneven bolt torque leads to uneven pressure on the positioning ring, causing the cylinder cross-section to become out of round and resulting in local gaps between the flange and the cylinder.
The movement of the hexagonal sleeve is controlled by an electric push rod. The positioning component expands through the support component, forming a regular hexagonal constraint. The rubber roller flexibly contacts the inner wall of the cylinder to evenly distribute the force, and the triangular structure provides stable support to avoid local deformation.
It achieves uniform positioning of the cylinder, avoids local deformation, increases the stress area, prevents scratches on the inner wall of the cylinder, ensures that the cylinder and the end cap fit together without gaps, and improves assembly accuracy.
Smart Images
Figure CN224674697U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical equipment manufacturing technology, specifically to a cylindrical workpiece positioning structure used in the production of chemical equipment. Background Technology
[0002] Chemical equipment manufacturing includes core component manufacturing and assembly, comprehensive testing and compliance certification, etc. Core component manufacturing and assembly includes metal processing, welding and assembly processes. The assembly process can be mainly divided into cylinder and head assembly and internal parts and accessories installation. The cylinder and head assembly uses alignment tooling to align the cylinder and head, control the misalignment, and then perform circumferential welding. Then, the flange is welded to the cylinder to ensure that the flange face is perpendicular to the cylinder axis to prevent leakage in subsequent pipeline connections.
[0003] In the current technology, before aligning the cylinder and the end cap using the alignment tooling, the position of the cylinder needs to be fixed. The cylinder is fixed by using a combination of V-blocks and positioning rings. The V-blocks support the bottom of the cylinder, the positioning rings are fitted on the end of the cylinder, and the positioning rings are tightened with bolts, thereby forcibly constraining the cylinder axis to the design position. In practical applications, when using a combination of V-blocks and positioning rings to fix a thin cylinder, the V-blocks and cylinders are in line contact. This causes the cylinder's weight to act entirely on the contact line between two symmetrical inclined planes, resulting in local deformation of the cylinder and a local offset of its axis. Consequently, the cylinder and the end cap cannot fit together properly. While using multiple bolts to tighten the positioning ring makes it difficult to ensure that each bolt has the same torque, bolts with higher torque will exert greater pressure on the positioning ring. The positioning ring then transmits this pressure to the cylinder, causing the corresponding area of the cylinder to be pressed inward and deformed. This results in the cylinder's cross-section becoming out of round, ultimately leading to a local gap between the flange and the cylinder. Therefore, a positioning structure for cylinder workpieces in chemical equipment production is proposed to solve the above problems. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a cylindrical workpiece positioning structure for chemical equipment production. It offers the advantage of uniformly positioning thinner cylindrical bodies and solves the problem of inconsistent contact between the V-block and positioning ring when fixing thinner cylindrical bodies. Specifically, when using a combination of V-blocks and positioning rings to fix thinner cylindrical bodies, the V-blocks and cylindrical bodies are in line contact, causing the weight of the cylindrical body to act entirely on the contact line between two symmetrical inclined planes. This results in localized deformation of the cylindrical body and localized offset of the cylindrical body's axis, preventing the cylindrical body from fitting snugly against the end cap. Furthermore, using multiple bolts to tighten the positioning ring makes it difficult to ensure that each bolt has the same torque. Bolts with higher torque exert greater pressure on the positioning ring, which then transmits this pressure to the cylindrical body, causing the corresponding area of the cylindrical body to be pressed inwards and deform. This leads to the cylindrical body's cross-section becoming out of round, ultimately resulting in localized gaps between the flange and the cylindrical body.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a positioning structure for cylindrical workpieces in chemical equipment production, comprising a positioning platform disposed on an alignment fixture, a cylindrical workpiece disposed on the positioning platform, and a positioning structure for positioning the cylindrical workpiece disposed on the positioning platform; The positioning structure includes a control component disposed on a positioning platform, a connecting component disposed on the control component, and a plurality of supporting components disposed on the connecting component, each of the supporting components being provided with a positioning component for supporting the positioning cylindrical workpiece. The control component includes a hexagonal cylinder fixedly mounted on the positioning platform, and an electric push rod for controlling the movement of the connecting component is fixedly mounted on the hexagonal cylinder. The connecting component includes two hexagonal sleeves installed on the outer surface of the hexagonal cylinder, with the hexagonal sleeve near the end of the hexagonal cylinder being fixedly connected to the hexagonal cylinder, the hexagonal sleeve near the positioning platform being slidably connected to the hexagonal cylinder, and the electric push rod being connected to the hexagonal sleeve near the positioning platform. The support component includes two cross-distributed support rods, with each end of the two support rods hinged to two hexagonal sleeves. A connector is rotatably installed at the intersection of the two support rods, and both support rods are connected to a positioning component on the same side.
[0006] Furthermore, the positioning component includes a positioning frame, which is hinged to the top of one of the support rods, and a rubber roller for contacting the inner wall of the cylindrical workpiece is rotatably mounted on the positioning frame.
[0007] Furthermore, the number of the supporting components and the positioning components are both six, and the supporting components and the positioning components are symmetrically distributed around the central axis of the hexagonal cylinder.
[0008] Furthermore, the hexagonal cylinder has two symmetrically distributed limiting grooves, and a limiting plate is fixedly installed inside the hexagonal sleeve near the positioning platform. The limiting plate is slidably connected to the limiting groove, and the telescopic end of the electric push rod is fixedly connected to the limiting plate.
[0009] Furthermore, a connecting shaft is fixedly installed at one end of the other support rod near the positioning frame, and a guide groove is provided on the upper part of the positioning frame, with the connecting shaft slidably connected to the guide groove.
[0010] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. The cylindrical workpiece positioning structure used in chemical equipment production controls the movement of two hexagonal sleeves through an electric push rod, thereby reducing the distance between the two hexagonal sleeves. The supporting components drive the positioning components to expand outward, thereby controlling the six centrally symmetrically distributed positioning components to abut against the inner wall of the cylindrical workpiece, forming a regular hexagonal constraint, completely restricting the six degrees of freedom of the cylindrical workpiece, and evenly distributing the force on the cylindrical workpiece, thereby avoiding deformation of the cylindrical workpiece due to excessive local stress. 2. The positioning structure for cylindrical workpieces used in chemical equipment production adopts a positioning component consisting of a positioning frame and a rubber roller. The rubber roller flexibly contacts the inner wall of the cylindrical workpiece, avoiding scratches on the inner wall of the cylindrical workpiece. It can also effectively fit the inner wall of the cylindrical workpiece, increasing the force-bearing area. Furthermore, the surface elastic deformation of the rubber roller can absorb the impact of loading and unloading. 3. The cylindrical workpiece positioning structure used in chemical equipment production utilizes two support rods and connecting parts in the support component to form a stable triangular structure, thereby providing stable support for the expansion and movement of the positioning component and ensuring stable support of the cylindrical workpiece by the positioning component. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structural positioning structure of this utility model; Figure 3 This is a schematic diagram of the structural connecting component and supporting component of this utility model; Figure 4 This is a schematic diagram of the structural support component and positioning component of this utility model.
[0012] In the diagram: 1. Positioning platform; 2. Cylinder workpiece; 3. Positioning structure; 31. Control component; 311. Hexagonal cylinder; 312. Electric push rod; 313. Limiting groove; 32. Connecting component; 321. Hexagonal sleeve; 322. Limiting plate; 33. Support component; 331. Support rod; 332. Connector; 333. Connecting shaft; 34. Positioning component; 341. Positioning frame; 342. Rubber roller. Detailed Implementation
[0013] 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.
[0014] Example 1: Please refer to Figure 1-4 The cylindrical workpiece positioning structure for chemical equipment production in this embodiment includes a positioning platform 1 set on a leveling fixture, a cylindrical workpiece 2 set on the positioning platform 1, and a positioning structure 3 for positioning the cylindrical workpiece 2 set on the positioning platform 1.
[0015] Example 2: Please refer to Figure 1-4Based on Embodiment 1, the positioning structure 3 includes a control component 31 disposed on the positioning platform 1, a connecting component 32 disposed on the control component 31, a plurality of supporting components 33 disposed on the connecting component 32, and a positioning component 34 disposed on each supporting component 33 for supporting the positioning cylindrical workpiece 2. The control component 31 includes a hexagonal cylinder 311 fixedly mounted on the positioning platform 1, and an electric push rod 312 for controlling the movement of the connecting component 32 is fixedly mounted on the hexagonal cylinder 311. The connecting component 32 includes two hexagonal sleeves 321 mounted on the outer surface of the hexagonal cylinder 311. The hexagonal sleeve 321 near the end of the hexagonal cylinder 311 is fixedly connected to the hexagonal cylinder 311, and the hexagonal sleeve 321 near the positioning platform 1 is slidably connected to the hexagonal cylinder 311. The electric push rod 312 is connected to the hexagonal sleeve 321 near the positioning platform 1. The support component 33 includes two cross-distributed support rods 331, and the two ends of the two support rods 331 are respectively hinged to two hexagonal sleeves 321. A connector 332 is rotatably installed at the intersection of the two support rods 331, and both support rods 331 are connected to the positioning component 34 on the same side.
[0016] There are six supporting components 33 and six positioning components 34. The supporting components 33 and the positioning components 34 are symmetrically distributed along the central axis of the hexagonal cylinder 311. The six supporting components 33 and the positioning components 34 are symmetrically distributed along the central axis of the hexagonal cylinder 311, forming a regular hexagonal constraint, which completely restricts the six degrees of freedom of the cylindrical workpiece 2, and can evenly distribute the force on the cylindrical workpiece 2 and the weight of the cylindrical workpiece 2 itself.
[0017] In addition, two symmetrically distributed limiting grooves 313 are provided on the hexagonal cylinder 311. A limiting plate 322 is fixedly installed inside the hexagonal sleeve 321 near the positioning platform 1, and the limiting plate 322 is slidably connected to the limiting groove 313. The telescopic end of the electric push rod 312 is fixedly connected to the limiting plate 322. The precise fit between the limiting groove 313 and the limiting plate 322 allows the electric push rod 312 to transmit driving force through the limiting plate 322, avoiding local deformation caused by direct force acting on the hexagonal sleeve 321, and restricting the movement trajectory of the hexagonal sleeve 321.
[0018] Using the above technical solution, when positioning the cylindrical workpiece 2, the electric push rod 312 is activated. The electric push rod 312 is rigidly connected to the limiting plate 322 through the telescopic end, driving the sliding hexagonal sleeve 321 close to the positioning table 1 to move axially along the hexagonal cylinder 311. When the sliding hexagonal sleeve 321 moves away from the positioning table 1, the distance between the two hexagonal sleeves 321 decreases, and the crossed support rods 331 rotate around the connector 332, reducing the included angle. This together drives the positioning component 34 to expand radially outward until the positioning component 34 abuts against the inner wall of the cylindrical workpiece 2.
[0019] Example 3: Please refer to Figure 1-4 Based on Embodiment 2, the positioning component 34 includes a positioning frame 341, and the positioning frame 341 is hinged to the top of one of the support rods 331. A rubber roller 342 for contacting the inner wall of the cylindrical workpiece 2 is rotatably mounted on the positioning frame 341. The rubber roller 342 is made of wear-resistant silicone rubber with a Shore hardness of 65A. The elastic deformation of the surface can absorb the impact of loading and unloading, and can effectively increase the contact area with the cylindrical workpiece 2, while avoiding rigid contact that scratches the inner wall of the cylindrical workpiece 2.
[0020] One of the support rods 331 has a connecting shaft 333 fixedly installed at one end near the positioning frame 341. The positioning frame 341 has a guide groove, and the connecting shaft 333 is slidably connected to the guide groove. The sliding fit between the connecting shaft 333 and the guide groove of the positioning frame 341 expands the radial adjustment range of the positioning frame 341. The sliding connection can compensate for the manufacturing error of the support rod 331 and avoid movement jamming.
[0021] Using the above technical solution, the rubber roller 342 in the outwardly expanding positioning component 34 gradually moves closer to the inner wall of the cylindrical workpiece 2 until the rubber roller 342 is in contact with the inner wall of the cylindrical workpiece 2. Since the six supporting components 33 and the positioning component 34 are symmetrically distributed along the central axis of the hexagonal cylinder 311, a regular hexagonal constraint is formed, which completely restricts the six degrees of freedom of the cylindrical workpiece 2, thereby achieving the positioning of the cylindrical workpiece 2.
[0022] The working principle of the above embodiments is as follows: The cylindrical workpiece positioning structure used in the production of chemical equipment activates the electric push rod 312 when positioning the cylindrical workpiece 2. The electric push rod 312 is rigidly connected to the limiting plate 322 through the telescopic end, driving the sliding hexagonal sleeve 321 close to the positioning table 1 to move axially along the hexagonal cylinder 311. At this time, the limiting plate 322 slides in the limiting groove 313, strictly limiting the movement direction of the sliding hexagonal sleeve 321 and ensuring the stability of the driving force transmission. When the sliding hexagonal sleeve 321 moves away from the positioning platform 1, the distance between the two hexagonal sleeves 321 decreases, the intersecting support rods 331 rotate around the connector 332, the included angle decreases, one of the support rods 331 pushes the positioning frame 341 through the hinge point with the positioning frame 341, and the connecting shaft 333 of the other support rod 331 slides along the guide groove of the positioning frame 341, together driving the positioning component 34 to expand radially outward; The rubber roller 342 in the outwardly expanding positioning component 34 gradually moves closer to the inner wall of the cylindrical workpiece 2 until the rubber roller 342 is in contact with the inner wall of the cylindrical workpiece 2. Since the six supporting components 33 and the positioning component 34 are symmetrically distributed along the central axis of the hexagonal cylinder 311, they form a regular hexagonal constraint, which completely restricts the six degrees of freedom of the cylindrical workpiece 2, thereby achieving the positioning of the cylindrical workpiece 2.
[0023] 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.
[0024] 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 positioning structure for cylindrical workpieces used in chemical equipment production, comprising a positioning table (1) mounted on an alignment fixture, characterized in that: The positioning table (1) is provided with a cylindrical workpiece (2), and the positioning table (1) is provided with a positioning structure (3) for positioning the cylindrical workpiece (2). The positioning structure (3) includes a control component (31) disposed on the positioning platform (1), a connecting component (32) disposed on the control component (31), a plurality of supporting components (33) disposed on the connecting component (32), and a positioning component (34) disposed on each supporting component (33) for supporting the positioning cylindrical workpiece (2). The control component (31) includes a hexagonal cylinder (311) fixedly installed on the positioning platform (1), and an electric push rod (312) for controlling the movement of the connecting component (32) is fixedly installed on the hexagonal cylinder (311). The connecting component (32) includes two hexagonal sleeves (321) installed on the outer surface of the hexagonal cylinder (311), and the hexagonal sleeve (321) near the end of the hexagonal cylinder (311) is fixedly connected to the hexagonal cylinder (311), the hexagonal sleeve (321) near the positioning platform (1) is slidably connected to the hexagonal cylinder (311), and the electric push rod (312) is connected to the hexagonal sleeve (321) near the positioning platform (1); The support component (33) includes two cross-distributed support rods (331), and the two ends of the two support rods (331) are respectively hinged to two hexagonal sleeves (321). A connector (332) is rotatably installed at the intersection of the two support rods (331), and both support rods (331) are connected to the positioning component (34) on the same side.
2. The cylindrical workpiece positioning structure for chemical equipment production according to claim 1, characterized in that: The positioning component (34) includes a positioning frame (341), and the positioning frame (341) is hinged to the top of one of the support rods (331). A rubber roller (342) for contacting the inner wall of the cylindrical workpiece (2) is rotatably mounted on the positioning frame (341).
3. The cylindrical workpiece positioning structure for chemical equipment production according to claim 1, characterized in that: The number of the support component (33) and the positioning component (34) are both six, and the support component (33) and the positioning component (34) are symmetrically distributed along the central axis of the hexagonal cylinder (311).
4. The cylindrical workpiece positioning structure for chemical equipment production according to claim 1, characterized in that: The hexagonal tube (311) has two symmetrically distributed limiting grooves (313). The hexagonal sleeve (321) near the positioning platform (1) is fixedly installed with a limiting plate (322), and the limiting plate (322) is slidably connected to the limiting groove (313). The telescopic end of the electric push rod (312) is fixedly connected to the limiting plate (322).
5. A cylindrical workpiece positioning structure for chemical equipment production according to claim 2, characterized in that: The other support rod (331) is fixedly mounted with a connecting shaft (333) at one end near the positioning frame (341). The positioning frame (341) has a guide groove, and the connecting shaft (333) is slidably connected to the guide groove.