A bell mouth device for bell mouth processing of a corrugated pipe
By using a telescopic cylinder to drive a conical top block to push an expansion block against a rotating roller through rolling friction, the problem of scratches and wear on the inner wall of the bellows is solved, and the stability and sealing of the bellows flaring process are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANSU LONGHAI PIPE TECH CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-05-29
Smart Images
Figure CN224294505U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of corrugated pipe processing technology, specifically to a device for flaring the end of a corrugated pipe. Background Technology
[0002] In the field of corrugated pipe processing, pipe end flaring is a key process to achieve the sealing and stability of pipe connections. By using mechanical force to enlarge the corrugated pipe end and form a specific shape, the contact area between the pipe end and the connector can be effectively increased.
[0003] In existing technologies, traditional bellows flaring devices mostly employ a rigid die for direct extrusion expansion. The die is mechanically or hydraulically driven to apply radial force to the bellows end, thus enlarging the pipe diameter. Because the rigid die is in direct sliding contact with the inner wall of the bellows, the friction between them is significant, easily leading to scratches, wear, and other damage to the inner wall. For thin-walled bellows or those requiring high surface precision, this damage not only affects the pipe's appearance but may also reduce its sealing performance and service life, increasing the risk of leakage during later use. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a device for flaring the end of bellows during bellows processing, which solves the problem that direct sliding contact between the rigid mold and the inner wall of the bellows can easily lead to scratches, wear, and other damage to the inner wall of the bellows.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a device for flaring the end of a corrugated pipe, comprising a base, a protective shell fixedly connected to the top of the base, a telescopic cylinder fixedly connected to the inner side of the protective shell, and a conical top block fixedly connected to the top of the telescopic cylinder; and further comprising a connecting assembly, wherein an expansion assembly is movably mounted on the top of the connecting assembly; the base provides stable support, and in the initial state, the telescopic cylinder is in a retracted state, and the conical top block is located at a lower position.
[0008] The connecting assembly includes a limiting block, a connecting block slidably connected to the inner side of the limiting block, and a compression spring fixedly connected to the side of the connecting block near the limiting block. The expansion assembly includes an expansion block, a rotating roller rotatably connected to the outer side of the expansion block, a rotating column rotatably connected to the inner side of the expansion block, a locking block fixedly connected to the bottom of the rotating column, a torsion spring fixedly connected to the outer side of the rotating column, and a paddle fixedly connected to the top of the rotating column. When the expansion block expands outward, it can realize the flaring operation of the bellows opening.
[0009] Preferably, the sidewall of the conical top block is slidably connected to the sidewall of the expansion block, and the connecting assembly and the expansion assembly are arranged in a ring along the central axis of the protective shell. As the conical top block rises, its sidewall contacts the sidewall of the expansion block and applies a thrust, at which time multiple expansion blocks are simultaneously subjected to thrust.
[0010] Preferably, the outer side of the limiting block is fixedly connected to the inner wall of the protective shell, and the end of the compression spring away from the connecting block is fixedly connected to the outer wall of the limiting block. When the expansion block is pushed, it can overcome the elastic force of the compression spring and drive the connecting block to slide outward along the inner side of the limiting block.
[0011] Preferably, a limiting post is fixedly connected to the outer side of the limiting block, the outer wall of the limiting post is slidably connected to the inner wall of the connecting block, and the compression spring is located outside the limiting post. The limiting post can prevent the compression spring from bending when compressed.
[0012] Preferably, the inner side of the expansion block is inserted into the top of the connecting block, and the side wall of the locking block is inserted into the inner side of the connecting block through a limiting hole, and the limiting hole is opened at the top of the connecting block. When the locking block is aligned with the limiting hole, the expansion block can be pulled out from the connecting block.
[0013] Preferably, the bottom end of the torsion spring is fixedly connected to the inner wall of the expansion block, and the outer wall of the locking block is slidably connected to the inner wall of the connecting block through a locking groove. The locking groove is opened on the inner side of the connecting block. Under the elastic force of the torsion spring, the locking block can be offset from the limiting hole in the locking groove, thereby preventing the locking block from coming out of the limiting hole.
[0014] (III) Beneficial Effects
[0015] This utility model provides a device for flaring the end of a corrugated pipe during processing. It has the following beneficial effects:
[0016] (i) The device drives the conical top block to move upward through the telescopic cylinder. As the conical top block rises, its side wall contacts the side wall of the expansion block and applies a thrust. At this time, the expansion block drives the connecting block to slide outward along the inner side of the limiting block, which can realize the expansion operation of the bellows opening. During the expansion process, the rotating roller contacts the inner wall of the bellows, changing the original sliding friction between the expansion block and the bellows into rolling friction, reducing the risk of scratches, wear and other damage to the inner wall of the bellows due to excessive friction.
[0017] (ii) The device rotates the rotating column by turning the lever. At this time, the torsion spring is twisted by force, and the locking block slides in the locking groove. When the locking block is aligned with the limiting hole, the expansion block can be pulled out from the connecting block. The operation process is simple. After the new expansion block is reinserted, the lever is released. Under the elastic force of the torsion spring, the locking block is reset in the locking groove and offset from the limiting hole, thereby preventing the locking block from coming out of the limiting hole and ensuring the stability of the expansion block during use. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the internal structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the connecting component of this utility model;
[0021] Figure 4 This is a schematic diagram of the connecting block of this utility model;
[0022] Figure 5 This is a schematic diagram of the expansion component of this utility model.
[0023] In the diagram: 1. Base; 2. Protective shell; 3. Telescopic cylinder; 4. Conical top block; 5. Connecting assembly; 6. Expansion assembly; 51. Limiting block; 52. Connecting block; 53. Limiting post; 54. Compression spring; 55. Locking groove; 56. Limiting hole; 61. Expansion block; 62. Rotating roller; 63. Rotating post; 64. Locking block; 65. Torsion spring; 66. Paddle. 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: Please refer to Figure 1-5 This utility model provides a technical solution: a device for flaring the end of a corrugated pipe, including a base 1, a protective shell 2 fixedly connected to the top of the base 1, a telescopic cylinder 3 fixedly connected to the inner side of the protective shell 2, a conical top block 4 fixedly connected to the top of the telescopic cylinder 3, and also including a connecting component 5, an expansion component 6 movably installed on the top of the connecting component 5, which provides stable support through the base 1. In the initial state, the telescopic cylinder 3 is in a retracted state, and the conical top block 4 is in a lower position.
[0026] The connecting assembly 5 includes a limiting block 51, with a connecting block 52 slidably connected to the inner side of the limiting block 51. A compression spring 54 is fixedly connected to the side of the connecting block 52 near the limiting block 51. The sidewall of the conical top block 4 is slidably connected to the sidewall of the expansion block 61. Both the connecting assembly 5 and the expansion assembly 6 are arranged in a ring along the central axis of the protective shell 2. The outer side of the limiting block 51 is fixedly connected to the inner wall of the protective shell 2. The end of the compression spring 54 away from the connecting block 52 is fixedly connected to the outer wall of the limiting block 51. A limiting post 53 is fixedly connected to the outer side of the limiting block 51. The outer wall of the limiting post 53 is slidably connected to the inner wall of the connecting block 52. The compression spring 54 is located outside the limiting post 53. The expansion assembly 6 includes an expansion block 61, with a rotating roller 62 rotatably connected to the outer side of the expansion block 61. A rotating column 63 is rotatably connected to the inner side of the expansion block 61. A locking block 64 is fixedly connected to the bottom of the rotating column 63, a torsion spring 65 is fixedly connected to the outer side of the rotating column 63, and a paddle 66 is fixedly connected to the top of the rotating column 63. The corrugated pipe to be expanded is placed on the top of the protective shell 2, so that the pipe opening is aligned with the expansion component 6. Then the telescopic cylinder 3 is activated, and the telescopic cylinder 3 drives the conical top block 4 to move upward. As the conical top block 4 rises, its side wall contacts the side wall of the expansion block 61 and applies a thrust. At this time, multiple expansion blocks 61 are simultaneously subjected to thrust. Under the action of thrust, the expansion block 61 overcomes the elastic force of the compression spring 54 and drives the connecting block 52 to slide outward along the inner side of the limiting block 51. As the expansion block 61 expands outward, the expansion operation of the corrugated pipe opening can be realized. During the expansion process, the rotating roller 62 contacts the inner wall of the corrugated pipe, changing the original sliding friction between the expansion block 61 and the corrugated pipe into rolling friction. To reduce the risk of scratches and wear on the inner wall of the bellows due to excessive friction, after expansion, the operator can manually rotate the bellows. The rotating roller 62 will continuously roll along the inner wall of the flared section as the bellows rotates. The rolling friction between the roller 62 and the inner wall of the flared section applies external force to uneven or protruding parts at the flared section, gradually squeezing and correcting some minor uneven areas. The expansion block 61 is stepped to accommodate bellows of various diameters. After expansion, the telescopic cylinder 3 begins to retract, causing the conical top block 4 to descend. At this time, under the elastic force of the compression spring 54, the connecting block 52 drives the expansion block 61 to return to its original position, completing one expansion cycle.
[0027] The inner side of the expansion block 61 is inserted into the top of the connecting block 52. The side wall of the locking block 64 is inserted into the inner side of the connecting block 52 through the limiting hole 56, which is located at the top of the connecting block 52. The bottom end of the torsion spring 65 is fixedly connected to the inner wall of the expansion block 61. The outer wall of the locking block 64 is slidably connected to the inner wall of the connecting block 52 through the locking groove 55, which is located on the inner side of the connecting block 52. When maintenance or replacement of the expansion assembly 6 is required, the operator only needs to rotate the column 63 by moving the lever 66. When rotated, the torsion spring 65 is twisted by force, and the locking block 64 slides in the locking groove 55. When the locking block 64 is aligned with the limiting hole 56, the expansion block 61 can be pulled out from the connecting block 52. The operation is simple. After the new expansion block 61 is reinserted, the lever 66 is released. Under the elastic force of the torsion spring 65, the locking block 64 is reset in the locking groove 55 and offset from the limiting hole 56, thereby preventing the locking block 64 from coming out of the limiting hole 56, thus ensuring the stability of the expansion block 61 during use.
[0028] Working Principle: During use, the base 1 provides stable support. Initially, the telescopic cylinder 3 is in the retracted state, and the conical top block 4 is in a lower position. The corrugated pipe to be expanded is placed on top of the protective shell 2, aligning the pipe opening with the expansion assembly 6. Then, the telescopic cylinder 3 is activated, causing the conical top block 4 to move upward. As the conical top block 4 rises, its sidewall contacts the sidewall of the expansion block 61 and applies a thrust. At this time, multiple expansion blocks 61 are simultaneously subjected to thrust. Under the action of thrust, the expansion blocks 61 overcome the elastic force of the compression spring 54 and drive the connecting block 52 to slide outward along the inner side of the limiting block 51. The limiting post 53 can prevent the compression spring 54 from bending when compressed. As the expansion blocks 61 expand outward, the expansion operation of the corrugated pipe opening can be realized. During the expansion process, the rotating roller 62 contacts the inner wall of the corrugated pipe, changing the original sliding friction between the expansion blocks 61 and the corrugated pipe into rolling friction. This reduces the risk of scratches, wear, and other damage to the inner wall of the corrugated pipe due to excessive friction.
[0029] After expansion is completed, the operator can manually rotate the bellows. At this time, the rotating roller 62 will continuously roll on the inner wall of the flare as the bellows rotates. The rolling friction between the rotating roller 62 and the inner wall of the flare will apply external force to the uneven and protruding parts of the flare, so that some small uneven areas will be gradually squeezed and corrected. The expansion block 61 is stepped to adapt to the bellows flaring work of various pipe diameters.
[0030] After the flaring is completed, the telescopic cylinder 3 begins to retract, causing the conical top block 4 to descend. At this time, under the elastic force of the compression spring 54, the connecting block 52 drives the expansion block 61 to return to its original position, completing one flaring cycle.
[0031] When maintenance or replacement of the expansion component 6 is required, the operator only needs to turn the rotating column 63 by moving the lever 66. At this time, the torsion spring 65 is twisted by force, and the locking block 64 slides in the locking groove 55. When the locking block 64 is aligned with the limiting hole 56, the expansion block 61 can be pulled out from the connecting component 5. The operation is simple. After the new expansion block 61 is reinserted, the lever 66 is released. Under the elastic force of the torsion spring 65, the locking block 64 is reset in the locking groove 55 and misaligned with the limiting hole 56, thereby preventing the locking block 64 from coming out of the limiting hole 56, thus ensuring the stability of the expansion block 61 during use.
[0032] 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.
[0033] 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 device for flaring the end of a corrugated pipe, comprising a base (1), a protective shell (2) fixedly connected to the top of the base (1), a telescopic cylinder (3) fixedly connected to the inner side of the protective shell (2), and a conical top block (4) fixedly connected to the top of the telescopic cylinder (3), characterized in that, Also includes: Connection component (5), on top of which expansion component (6) is movably mounted; The connecting component (5) includes a limiting block (51), a connecting block (52) is slidably connected to the inner side of the limiting block (51), and a compression spring (54) is fixedly connected to the side of the connecting block (52) near the limiting block (51). The expansion assembly (6) includes an expansion block (61), a rotating roller (62) is rotatably connected to the outer side of the expansion block (61), a rotating column (63) is rotatably connected to the inner side of the expansion block (61), a locking block (64) is fixedly connected to the bottom of the rotating column (63), a torsion spring (65) is fixedly connected to the outer side of the rotating column (63), and a paddle (66) is fixedly connected to the top of the rotating column (63).
2. The device for flaring the end of a corrugated pipe as described in claim 1, characterized in that: The sidewall of the conical top block (4) is slidably connected to the sidewall of the expansion block (61), and the connecting component (5) and the expansion component (6) are arranged in a ring along the central axis of the protective shell (2).
3. The device for flaring the end of a corrugated pipe as described in claim 1, characterized in that: The outer side of the limiting block (51) is fixedly connected to the inner wall of the protective shell (2), and the end of the compression spring (54) away from the connecting block (52) is fixedly connected to the outer wall of the limiting block (51).
4. The device for flaring the end of a corrugated pipe as described in claim 3, characterized in that: The outer side of the limiting block (51) is fixedly connected to the limiting post (53), the outer wall of the limiting post (53) is slidably connected to the inner wall of the connecting block (52), and the compression spring (54) is located on the outer side of the limiting post (53).
5. The device for flaring the end of a corrugated pipe as described in claim 1, characterized in that: The inner side of the expansion block (61) is inserted into the top of the connecting block (52), and the side wall of the locking block (64) is inserted into the inner side of the connecting block (52) through the limiting hole (56), and the limiting hole (56) is opened on the top of the connecting block (52).
6. The device for flaring the end of a corrugated pipe according to claim 1, characterized in that: The bottom end of the torsion spring (65) is fixedly connected to the inner wall of the expansion block (61), and the outer wall of the locking block (64) is slidably connected to the inner wall of the connecting block (52) through the locking groove (55), and the locking groove (55) is opened on the inner side of the connecting block (52).