Large cylinder upper and lower half split splicing cylinder centering device

Abstract

The utility model discloses a large-scale cylinder upper and lower half split surface splicing centering device, which belongs to the field of cylinder processing, and comprises a guide post and an extension part fixedly arranged on the upper end surface of the guide post, the diameter of the guide post is matched with a through hole on a cylinder, and the longitudinal projection of the extension part completely falls within the range of the end surface of the guide post; when the upper half air cylinder and the lower half air cylinder are centered, the positioning columns penetrate through the corresponding through holes in the downward moving process of the upper half air cylinder, and therefore positioning of the upper half air cylinder and the lower half air cylinder is achieved. By means of the centering device, cylinder centering becomes simple and efficient, safety and efficiency during work are greatly improved, and meanwhile the device is easy to manufacture, convenient to operate, capable of being suitable for centering operation of many large cylinders and high in economical efficiency and practicability.

Description

Technical Field

[0001] The utility model belongs to the field of cylinder processing, and particularly relates to a device for aligning the upper and lower half split surfaces of a large cylinder when assembling cylinders. Background Art

[0002] Before the upper and lower halves of the cylinder enter the fine machining stage and have center requirements for machining, after the split surfaces and screw holes are machined respectively, it is necessary to combine the upper and lower halves of the cylinder into one. After the split surfaces are accurately aligned (all the screw holes of the upper and lower halves are aligned), they are fixed with bolts, and then subsequent internal cavity machining and positioning pin hole machining are carried out.

[0003] Before machining the positioning pin holes of a large cylinder, the cylinder assembly alignment is a very cumbersome process. Due to the lack of tools, in conventional operations, the alignment of the split surfaces (or the alignment of the screw holes) is observed by the naked eye, mainly relying on the experience of the overhead crane and the operator. Sometimes, repeated lifting and moving, and even knocking and other means are required. Due to the heavy weight, large volume of the cylinder, it is difficult to make fine adjustments, and the adjustment time takes a long time and is not safe.

[0004] Since the positioning pin holes and guide pillar holes have not been machined in the above operation stage, and there is a lack of necessary tooling or device support for alignment, the alignment operation is a very time-consuming and laborious process for a large cylinder. Especially with the increasing production of large cylinders, their single weight reaches dozens of tons, and their length, width, and height are all large. It is very inconvenient to observe by the naked eye during alignment, and it is also difficult to make fine adjustments to the overhead crane. Sometimes, tools such as hammers are often needed to strike the cylinder body to complete the alignment operation, which has potential safety hazards and low efficiency.

[0005] Therefore, it is necessary to provide a device for aligning the upper and lower half split surfaces of a large cylinder when assembling cylinders, which improves the safety and efficiency during work. Content of the Utility Model

[0006] The embodiment of the utility model provides a device for aligning the upper and lower half split surfaces of a large cylinder when assembling cylinders to solve the problems in the prior art.

[0007] The embodiment of the utility model adopts the following technical solution: A device for aligning the upper and lower half split surfaces of a large cylinder when assembling cylinders. The cylinder is assembled by an upper half cylinder and a lower half cylinder. The upper half cylinder is provided with a plurality of through holes, and the lower half cylinder is provided with screw holes corresponding to the plurality of through holes one by one. A counterbore with a diameter consistent with that of the corresponding through hole is provided at the top of the screw hole; it includes a guide pillar and an extension part fixedly installed on the upper end face of the guide pillar. The diameter of the guide pillar is adapted to the through hole on the cylinder, and the longitudinal projection of the extension part completely falls within the range of the end face of the guide pillar.

[0008] Preferably, the extension part is configured as three groups of cylindrical steel pipes evenly arranged around the upper end face of the guide post. Each steel pipe extends upward from the upper end of the guide post and gradually approaches the axis of the guide post, and the outer side of the bottom end of the steel pipe is tangent to the outer wall surface of the guide post.

[0009] Preferably, it further includes a lifting bolt and a triangular chassis. The lifting bolt is longitudinally installed at the center of the chassis. The lifting bolt passes through the guide post body along the axis of the guide post and is threadedly connected thereto; the outer diameter of the chassis is smaller than the outer diameter of the guide post.

[0010] Preferably, the outer circle at the upper end of the guide post is chamfered.

[0011] Preferably, the tops of the three groups of steel pipes are all installed on a nut part, and the nut part is coaxial with the guide post.

[0012] Preferably, a hook is also assembled on the nut part, and the hook is suspended by a crane.

[0013] Preferably, the upper and lower ends of the three groups of steel pipes are fixed by welding.

[0014] The above at least one technical solution adopted in the embodiment of the present invention can achieve the following beneficial effects:

[0015] First, when the upper and lower half cylinders of the present invention are aligned, during the downward movement of the upper half cylinder, the corresponding through holes pass through the positioning posts, thereby realizing the positioning of the upper and lower half cylinders; by providing an extension part above the guide post, it is convenient to take and place the guide post, and the longitudinal projection of the extension part completely falls within the range of the end face of the guide post, thereby avoiding the extension part from affecting the downward alignment of the upper half cylinder and ensuring that the upper half cylinder can fall smoothly; through this alignment device, the alignment of the cylinder becomes simple and efficient, greatly improving the safety and efficiency during work. At the same time, this device is simple to manufacture and convenient to replace, and can be applied to the alignment operations of many large cylinders, with strong economy and practicability.

[0016] Second, under the guiding action of the three cylindrical steel pipes, the upper half cylinder can be automatically fine-tuned and slide onto the positioning post during the slow downward movement, so that the two half cylinders are accurately positioned until completion.

[0017] Third, the horizontal height of the positioning post can be adjusted through the lifting bolt and the chassis to ensure that the positioning post is in a suitable position. Description of the Drawings

[0018] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0019] Figure 1 Half-sectional view of the centering device of the present utility model;

[0020] Figure 2 Top view of the lifting bolt and the chassis of the present utility model;

[0021] Figure 3 Cross-section of the centering device, the upper half cylinder and the lower half cylinder of the present utility model Figure 1 ;

[0022] Figure 4 Cross-section of the centering device, the upper half cylinder and the lower half cylinder of the present utility model Figure 2 ;

[0023] Reference numerals:

[0024] 1 - Upper half cylinder; 11 - Through hole; 2 - Lower half cylinder; 21 - Threaded hole; 22 - Counterbore; 3 - Guide post; 4 - Extension part; 41 - Steel pipe; 42 - Nut part; 5 - Lifting bolt; 51 - Chassis; 6 - Hook. Specific embodiments

[0025] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments of the present utility model and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0026] The following will detail the technical solutions provided by each embodiment of the present utility model in conjunction with the drawings.

[0027] Referring to Figure 3 As shown, an embodiment of the present utility model provides a centering device for assembling and centering the upper and lower half split surfaces of a large cylinder. The cylinder is assembled by an upper half cylinder 1 and a lower half cylinder 2. A plurality of through holes 11 are provided on the upper half cylinder 1, and threaded holes 21 corresponding to the plurality of through holes 11 one by one are provided on the lower half cylinder 2. A counterbore 22 with a diameter consistent with that of the corresponding through hole 11 is provided at the top of the threaded hole 21;

[0028] Embodiment 1:

[0029] Referring to Figure 1 , Figure 4 As shown, the centering device includes a guide post 3 and an extension part 4 fixedly installed on the upper end surface of the guide post 3. The diameter of the guide post 3 is adapted to the through hole 11 on the cylinder, and the longitudinal projection of the extension part 4 completely falls within the range of the end surface of the guide post 3;

[0030] During alignment, two such alignment devices need to be separately placed into two threaded holes 21 of the lower half cylinder 2 (it is recommended to arrange them diagonally to ensure the alignment of the upper half cylinder 1 and the lower half cylinder 2). The guide posts 3 slide into the counterbores 22 at the upper ends of the threaded holes 21 and abut against the steps between the counterbores 22 and the threaded holes 21. At this time, ensure the height of the positioning posts so that the positioning posts protrude above the mounting surface of the lower half cylinder 2. In appropriate cases, pads can also be placed under the positioning posts (such as Figure 4 in the step of the counterbore) to ensure the height of the positioning posts; during alignment, when the upper half cylinder 1 moves downward, the corresponding through holes 11 pass through the positioning posts, thereby realizing the positioning of the upper half cylinder 1 and the lower half cylinder 2; by providing an extension part 4 above the guide post 3, it is convenient to pick up and place the guide post 3, and the longitudinal projection of this extension part 4 completely falls within the range of the end face of the guide post 3, thereby preventing the extension part 4 from affecting the downward alignment of the upper half cylinder 1 and ensuring that the upper half cylinder 1 can fall smoothly;

[0031] Since cylinders above model No. 63 basically have Φ127 through holes 11, the size of the guide post 3 in this alignment device is only slightly smaller than Φ127 for positioning. The size of the guide post 3 is Φ126.9mm, and the tolerance is 0 - 0.01mm. Different specifications can also be made according to the size of the cylinder through hole 11; therefore, through this alignment device, cylinder alignment becomes simple and efficient, greatly improving the safety and efficiency during work. At the same time, this device is simple to manufacture and convenient to replace, and can be applied to the alignment operations of many large cylinders, with strong economy and practicability.

[0032] Embodiment Two:

[0033] Refer to Figure 1 and Figure 3 As shown, on the basis of Embodiment One, the extension part 4 is configured as three groups of cylindrical steel pipes 41 evenly arranged around the upper end face of the guide post 3. Each steel pipe 41 extends upward from the upper end of the guide post 3 and gradually approaches the axis of the guide post 3. And the outer side of the bottom end of the steel pipe 41 is tangent to the outer wall surface of the guide post 3. The outer circle at the upper end of the guide post 3 is chamfered. The cylindrical steel pipe 41: the specification is about Φ10, the height is 400mm, and it needs to have a certain strength. The outer side of the bottom is tangent or close to the outer circle of the alignment guide post 3, and both the upper and lower ends are fixed by welding. This steel pipe 41 plays a role of high - level guidance during alignment.

[0034] Thus, under the guiding action of the three cylindrical steel pipes 41, during the slow descent of the upper half cylinder 1, it can be automatically fine - tuned and slide onto the positioning posts, enabling the accurate positioning of the two half cylinders until completion.

[0035] Embodiment Three:

[0036] Refer to Figures 1 to 3As shown, in this embodiment, the centering device further includes a lifting bolt 5 and a triangular chassis 51. The lifting bolt 5 is longitudinally installed at the center of the chassis 51. The lifting bolt 5 passes through the body of the guiding column 3 along the axis of the guiding column 3 and is threadedly connected thereto. The outer diameter of the chassis 51 is 2-3 mm smaller than Φ127. During use, the horizontal position of the centering guiding column 3 is raised or lowered by rotation.

[0037] In this embodiment, when centering the upper half cylinder 1 and the lower half cylinder 2, the positioning column is placed into the counterbore 22 of the lower half cylinder 2, and the chassis 51 is placed on the step between the counterbore 22 and the screw hole 21. According to the cylinder model produced correspondingly, the distance between the guiding column 3 and the lifting bolt 5 is controlled in advance by rotation to ensure the height of the positioning column, making it 20-30 mm higher than the mounting surface of the lower half cylinder 2. In this way, the placement position of the positioning column can be accurately controlled, and it is applicable to the centering installation of more cylinder models.

[0038] The outer diameter of the chassis 51 is smaller than the outer diameter of the guiding column 3. The guiding column 3 may be provided with an inner hole with a diameter of Φ80 mm, a height of 45 mm, and a chamfer of 10×5 mm. In this case, a triangular bracket needs to be installed in the inner hole and welded and fixed to the centering guiding column 3, and an M10 screw hole 21 is machined in the middle for threaded cooperation with the lifting bolt 5.

[0039] Specifically, the tops of the three groups of steel pipes 41 are all installed on a nut member 42 with a specification of M10, and the nut member 42 is coaxial with the guiding column 3. A hook 6 is also assembled on the nut member 42, and the hook 6 is suspended by a crane for lifting and moving the centering device.

[0040] The above are only the embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A large cylinder upper and lower half center split surface assembly cylinder centering device, the cylinder is assembled by an upper cylinder (1) and a lower cylinder (2), the upper cylinder (1) is provided with a plurality of through holes (11), the lower cylinder (2) is provided with screw holes (21) corresponding to the plurality of through holes (11), the top of the screw hole (21) is provided with a countersunk hole (22) having the same diameter as the corresponding through hole (11); characterized in that: The centering device comprises a guide column (3) and an extension portion (4) fixedly mounted on the upper end surface of the guide column (3); the diameter of the guide column (3) is matched with a through hole (11) on the cylinder; and the longitudinal projection of the extension portion (4) completely falls within the end surface range of the guide column (3).

2. A large cylinder upper and lower half center split surface cylinder centering device according to claim 1, characterized in that: The extension portion (4) is configured as three groups of cylindrical steel pipes (41) evenly arranged around the upper end surface of the guide column (3), each steel pipe (41) extends upward from the upper end of the guide column (3) and gradually approaches the axis of the guide column (3), and the outer side of the bottom end of the steel pipe (41) is tangent to the outer wall surface of the guide column (3).

3. A large cylinder upper and lower half center split surface assembly cylinder centering device according to claim 1 or 2, characterized in that: It also includes a lifting bolt (5) and a triangular base frame (51), wherein the lifting bolt (5) is longitudinally mounted at the center of the base frame (51), and the lifting bolt (5) passes through the body of the guide column (3) along the axis of the guide column (3) and is threadedly connected thereto; The outer diameter of the base frame (51) is smaller than the outer diameter of the guide column (3).

4. A large cylinder upper and lower half center split surface assembly cylinder centering device according to claim 1, characterized in that: The outer circle of the upper end of the guide column (3) is chamfered.

5. A large cylinder upper and lower half center split surface assembly cylinder centering device according to claim 2, characterized in that: The tops of the three groups of steel pipes (41) are all mounted on a nut member (42), and the nut member (42) is coaxial with the guide column (3).

6. A large cylinder upper and lower half center split surface assembly cylinder centering device according to claim 5, characterized in that: The nut member (42) is also equipped with a hook (6), and the hook (6) is suspended by a crane.

7. A large cylinder upper and lower half center split surface assembly cylinder centering device according to claim 5, characterized in that: The upper and lower ends of the three groups of steel pipes (41) are fixed by welding.

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