Crimping mechanism for preventing virtual crimping

Abstract

A crimping mechanism for preventing virtual crimping comprises a mounting seat, an outer tube mounted in the mounting seat, an inner tube sleeved in the outer tube and a crimping block, and the crimping block comprises a base portion, an insertion portion and an annular abutting portion. According to the crimping mechanism capable of preventing virtual crimping, the annular abutting part is provided with the pressing ring used for making contact with the end face of the inner pipe and the abutting ring, the pressing ring is used for pressing the inner pipe into the outer pipe, the abutting ring is matched with the inner chamfer, and when the abutting ring and the inner chamfer are completely overlapped, the inner pipe is pressed into the outer pipe. The pressing ring just presses the inner pipe to a corresponding position, an operator only needs to press the crimping block until the crimping block cannot continue to move, complete crimping can be ensured, the requirement for precision of the operator in the machining process is reduced, production efficiency is improved, virtual pressing basically does not occur in the crimping process, and the product quality is improved. And the burden of a subsequent product quality detection link is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of crimping, in particular to a crimping mechanism for preventing false crimping. Background Art

[0002] With the improvement of processing level, people's performance requirements for pipelines are also constantly increasing. A single plastic pipe body cannot meet people's performance requirements for pipelines. There is a plastic pipe body currently available, in which an inner pipe of a different material is installed inside, thereby increasing the structural strength of the pipeline and enhancing the corrosion resistance of the inner wall of the plastic pipe body. Since the plastic pipe body is generally formed in one piece, the inner pipe needs to be pressed into the plastic pipe body from the outside. At the same time, in order to facilitate the press-fitted plastic pipe body to be conveniently connected to other pipe bodies to extend the length of the pipeline when in use, an inner chamfer is generally provided at the opening of the plastic pipe. When the inner pipe is crimped, its end needs to be exactly flush with the bottom of the chamfer of the inner chamfer. The existing crimping method is generally performed manually, and the operator needs to press the inner pipe to the appropriate position based on actual needs and experience.

[0003] However, there are many problems in the crimping process: since this crimping method requires a high level of operator skills, the production efficiency is very low when the operator is unskilled. At the same time, manual crimping may not be properly crimped, that is, the top edge of the inner tube is often higher than the bottom of the inner chamfer, which will affect the subsequent use and installation of the pipe body. This requires an additional inspection step after crimping to select and rework the pipes with false crimping, which makes the crimping steps cumbersome and low in production efficiency. Utility Model Content

[0004] In view of this, the present invention provides a crimping mechanism for preventing false crimping to solve the above problem.

[0005] A crimping mechanism for preventing false crimping, comprising a mounting seat, an outer tube mounted in the mounting seat, an inner tube sleeved in the outer tube, and a crimping block spaced apart from the mounting seat. The crimping block comprises a base, a plug-in portion arranged at one end of the base, and an annular abutment portion arranged on the outer side wall of the plug-in portion. A circle of inner chamfers is provided at the opening of the outer tube. The annular abutment block is cylindrical, and the outer contour radius of the plug-in portion is equal to the inner wall radius of the inner tube. The annular abutment block comprises a pressing ring parallel to the end face of the inner tube, and an abutment ring arranged on one side of the pressing ring and having the same inclination angle as the inner chamfer. The width of the abutment ring is equal to the width of the inner tube, and the width of the abutment ring is equal to the width of the inner chamfer.

[0006] Furthermore, the abutment ring and the base are spaced apart.

[0007] Furthermore, the base and the plug-in portion are respectively ring bodies, and the inner holes of the ring bodies of the base and the plug-in portion are connected.

[0008] Furthermore, an outer chamfer is provided on the end side wall of the plug-in portion.

[0009] Furthermore, a clamping ring is vertically arranged on the outer wall of the outer tube.

[0010] Furthermore, the mounting seat includes a seat body, a tube body mounting groove provided on the top of the seat body, and a clamping ring mounting groove provided on the outside of the tube body mounting groove.

[0011] Furthermore, the distance between the end surface of the plug-in portion and the annular crimping portion on the annular abutting block does not exceed the length of the portion of the outer tube that extends beyond the mounting seat.

[0012] Compared with the prior art, the crimping mechanism for preventing false crimping provided by the present invention is provided with a crimping block, an inserting portion is provided on the crimping block, and an annular abutting portion is provided on the inserting portion, the annular abutting portion has a pressing ring for contacting the end face of the inner tube, and an abutting ring for contacting the inner chamfer on the outer tube, the pressing ring is used to press the inner tube into the outer tube, the abutting ring matches the inner chamfer, and when the abutting ring completely overlaps with the inner chamfer, the pressing ring just presses the inner tube to the corresponding position, and the operator only needs to press the crimping block until it cannot move further to ensure complete crimping, which reduces the operator's processing accuracy requirements and improves production efficiency, so that there is basically no false pressure during the crimping process, which reduces the burden of subsequent product quality inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a crimping mechanism for preventing false crimping provided by the present invention.

[0014] Figure 2 for Figure 1 A cross-sectional view of a crimping mechanism for preventing false crimping.

[0015] Figure 3 for Figure 1 A partial enlarged view of the crimping mechanism at point A to prevent false crimping. DETAILED DESCRIPTION

[0016] The following is a further detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0017] like Figures 1 to 3As shown in FIG, which is a schematic diagram of the structure of the crimping mechanism for preventing false crimping provided by the present invention. The crimping mechanism for preventing false crimping includes a mounting base 10, an outer tube 20 mounted within the mounting base 10, an inner tube 30 sleeved within the outer tube 20, and a crimping block 40 spaced apart from the mounting base 10. The crimping mechanism for preventing false crimping also includes other functional modules, such as a connection structure provided on the mounting base 10 to facilitate fixing the mounting base 10 to a desktop, etc. These should be well known to those skilled in the art and will not be described in detail here.

[0018] The mounting base 10 includes a base body 11, a tube body mounting groove 12 provided at the top of the base body 11, and a snap ring mounting groove 13 provided at the top of the base body 11. In this embodiment, there are two tube body mounting grooves 12, and the operator can crimp two tube bodies at a time and then replace them with new ones, thereby reducing the number of times the tube bodies need to be handled. The snap ring mounting groove 13 is sleeved onto the outside of the tube body mounting groove 12. The tube body mounting groove 12 is used to accommodate and position the outer tube 20, and the snap ring mounting groove 13 is used to accommodate and position the snap ring 23 described below on the outer tube 20, thereby ensuring that the outer tube 20 can be stably mounted within the base body 11.

[0019] The outer tube 20 is an integrally molded structure made of plastic. It comprises a body 21, an inner chamfer 22 at one end of the body 21, and a retaining ring 23 perpendicularly mounted on the outer wall of the body 21. The inner chamfer 22 serves to guide the insertion of the inner tube 30 and, subsequently, the insertion of external piping. The retaining ring 23 not only provides stability during installation but also facilitates connection of the outer tube 20 to other equipment during subsequent use.

[0020] The inner tube 30 is sleeved inside the outer tube 20 to enhance the strength of the outer tube 20 and allow externally connected pipes to directly contact the inner tube 30 to improve connection performance, while also isolating the liquid in the pipe from the outer tube 20.

[0021] The crimping block 40 is separated from the mounting base 10 and is manually or mechanically moved back and forth toward and away from the mounting base 10 to continuously crimp the inner tube 30 into the outer tube 20. The crimping block 40 includes a base 41, a plug-in portion 42 disposed at one end of the base 41, and an annular abutment portion 43 disposed on the outer sidewall of the plug-in portion 42.

[0022] The base portion 41 and the inserting portion 42 are each annular, and the inner holes of the base portion 41 and the inserting portion 42 are connected, thereby allowing the air pressure within the outer tube 20 to be connected to the atmosphere during insertion. This prevents the gas from being sealed and generating a reaction force during the crimping process that would hinder the insertion portion 42 from being pressed into the outer tube 20 and affect the crimping effect. The ring radius of the base portion 41 is larger than the ring radius of the inserting portion 42. During use, the operator can manually press the inserting portion 42 into the outer tube 20 by grasping the outer wall of the base portion 41.

[0023] The outer side of the end of the plug-in portion 42 is provided with an outer chamfer 421, so as to facilitate the insertion of the plug-in portion 42 into the outer tube 20. The distance between the end face of the plug-in portion 43 and the annular abutment portion 43 is smaller than the distance between the top of the outer tube 20 and the clamping ring 23, so that during the crimping process, the plug-in portion 42 only enters the portion of the outer tube 20 exposed from the tube body mounting groove 12. Since the outer tube 20 is prone to expansion during crimping due to precision errors, this avoids the expanded outer tube 20 being restricted by the tube body mounting groove 12, making it difficult to insert or remove the plug-in portion 42, affecting the efficiency of crimping. The outer contour radius of the plug-in portion 42 is the same as the inner wall radius of the outer tube 20, so that it can freely enter and exit the outer tube 20, making it convenient to press the inner tube 30 into the outer tube 20.

[0024] The annular abutment portion 43 includes a pressing ring 431 parallel to the end face of the inner tube 30 and an abutment ring 432 parallel to the inner chamfer 22 of the outer tube 20. The width of the pressing ring 431 is the same as the thickness of the inner tube 30. During the press-fitting process, the pressing ring 431 completely abuts the end face of the inner tube 30, thereby stably pressing the inner tube 30 into place.

[0025] The position of the abutment ring 432 corresponds to the inner chamfer 22, and the width of the abutment ring 432 is the same as the width of the inner chamfer 22. During the crimping process, the abutment ring 432 is tightly attached to the inner chamfer 22, and when crimped into place, the abutment ring 432 and the inner chamfer 22 completely overlap. At this time, the crimping block 40 will not be able to continue crimping, avoiding the occurrence of overpressure, while also ensuring that the crimping is in place.

[0026] The abutment ring 432 is spaced apart from the base 41 to ensure that the base 41 is spaced apart from the outer tube 20 during the crimping process, thereby preventing the base 41 from contacting the outer tube 20 and causing overpressure.

[0027] During use, the operator first inserts the outer tube 20 into the mounting seat 10, and then pre-inserts an inner tube 30 into the outer tube 20. Thereafter, the operator uses the crimping block 40 to slowly and continuously press the inner tube 30 into the outer tube 20 until the abutment ring 432 completely overlaps with the inner chamfer 22, and the crimping block 40 can no longer be pressed in. At this time, the inner tube 30 and the outer tube 20 are just completely crimped.

[0028] The present invention also provides a method for preventing false crimping by providing a crimping block 40, a plug-in portion 42 and an annular abutment portion 43 provided on the plug-in portion 42, the annular abutment portion 43 having a pressing ring 431 for contacting the end face of the inner tube 30 and an abutment ring 432 for contacting the inner chamfer 22 on the outer tube 20, the pressing ring 431 is used to press the inner tube 30 into the outer tube 20, the abutment ring 432 matches the inner chamfer 22, and when the abutment ring 432 completely overlaps with the inner chamfer 22, the pressing ring 431 just presses the inner tube 30 to the corresponding position, and the operator only needs to press the crimping block 40 until it cannot move further to ensure complete crimping, which reduces the operator's processing accuracy requirements and improves production efficiency, so that there is basically no false pressure during the crimping process, which reduces the burden of subsequent product quality inspection.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements or improvements within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A crimping mechanism for preventing false crimping, characterized by: The crimping mechanism for preventing false crimping includes a mounting seat, an outer tube mounted in the mounting seat, an inner tube sleeved in the outer tube, and a crimping block spaced apart from the mounting seat, the crimping block including a base, a plug-in portion arranged at one end of the base, and an annular abutment portion arranged on the outer side wall of the plug-in portion, a circle of inner chamfer is arranged at the opening of the outer tube, the annular abutment portion is cylindrical, the outer contour radius of the plug-in portion is equal to the inner wall radius of the inner tube, the annular abutment portion includes a pressing ring parallel to the end face of the inner tube, and an abutment ring arranged on one side of the pressing ring and having the same inclination angle as the inner chamfer, the width of the abutment ring is equal to the width of the inner tube, and the width of the abutment ring is equal to the width of the inner chamfer.

2. The crimping mechanism for preventing false crimping according to claim 1, wherein: The abutting ring and the base are spaced apart.

3. The crimping mechanism for preventing false crimping according to claim 1, wherein: The base and the plug-in portion are respectively ring bodies, and the inner holes of the ring bodies of the base and the plug-in portion are connected.

4. The crimping mechanism for preventing false crimping according to claim 1, wherein: An outer chamfer is formed on the end side wall of the plug-in portion.

5. The crimping mechanism for preventing false crimping according to claim 1, wherein: A clamping ring is vertically arranged on the outer wall of the outer tube.

6. The crimping mechanism for preventing false crimping according to claim 5, wherein: The mounting seat includes a seat body, a tube body mounting groove arranged on the top of the seat body, and a clamping ring mounting groove arranged on the outside of the tube body mounting groove.

7. The crimping mechanism for preventing false crimping according to claim 1, wherein: The distance between the end surface of the plug-in portion and the annular abutting portion does not exceed the length of the portion of the outer tube that extends beyond the mounting seat.

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