Heating mechanism for positive pressure expansion of heat shrink tube
By setting up a hot oil spray device in the heat shrink tube heating mechanism, the heating problem of uneven heating caused by the heat shrink tube floating on the liquid surface is solved, and uniform heating and expansion of the heat shrink tube is achieved, and product quality is improved.
Patent Information
- Application Number
- CN202422529854.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-20
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-20
AI Technical Summary
During the heating process, the heat shrink tube floats on the surface of the liquid working fluid, resulting in uneven heating, affecting the quality and performance of the heat shrink tube.
A heating mechanism is designed, including a heating oil pipe, a shield, an oil heating barrel and a hot oil spray device. The hot oil is evenly covered and flowed through the heat shrinking tube in the heating oil pipe to ensure uniform heat distribution.
The uniform heating of the heat shrink tube is achieved, which avoids the problem of uneven expansion and improves the quality and performance of the heat shrink tube.
Smart Images
Figure CN223211739U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of heat shrink tube production equipment, in particular to a heating mechanism used for positive pressure expansion of heat shrink tubes. Background Art
[0002] A positive pressure expansion system for heat shrink tubing typically includes a conveying device, a pressure-maintaining heating device, an expansion device, a cooling device, and a pulling device. In this system, the pressure-maintaining heating device heats the heat shrink tubing to a certain temperature, causing it to reach a highly elastic state, thereby allowing expansion. However, in existing technologies, the heat shrink tubing sometimes floats on the surface of the liquid working medium (such as glycerin) during the heating process. This is primarily due to the heat shrink tubing's lower density than the liquid working medium and the buoyancy generated by the heat. This floating phenomenon can lead to uneven heating of the heat shrink tubing, which in turn affects the tubing's quality and performance. Utility Model Content
[0003] The utility model aims to solve the problems existing in the above-mentioned prior art and provides a heating mechanism for positive pressure expansion of heat shrinkable tubes, which solves the problem of uneven heating caused by the heat shrinkable tubes floating on the surface of the liquid working medium during heating.
[0004] The technical solution adopted by the utility model is as follows: a heating mechanism for positive pressure expansion of a heat shrinkable tube, comprising a frame, a heating oil pipe fixedly mounted on the frame, a protective cover covering the outside of the heating oil pipe, and more than one oil heating barrel for heating medium oil, a hot oil spraying device, the oil heating barrel being arranged below the heating oil pipe and connected to the bottom of the heating oil pipe through a pipe, the hot oil spraying device comprising a hot oil delivery pump, the oil inlet end of the hot oil delivery pump being connected to the oil heating barrel through a pipe, and the oil outlet end being connected to a spraying main pipe arranged above the heating oil pipe through a pipe, the spraying main pipe being connected to a plurality of branch pipes connected to the top of the heating oil pipe, a bracket being fixedly mounted axially inside the heating oil pipe, the heat shrinkable tube being located on the bracket, a plurality of through holes being opened on the side wall of the bracket and connected to the inner cavity of the heating oil pipe, a mesh slot being provided on the upper part of the bracket, a plurality of oil holes being distributed on the bottom plate of the mesh slot, and the hot oil entering through the branch pipes dripping from the oil holes of the mesh slot.
[0005] Furthermore, a filter is provided on the pipeline connected to the oil inlet end of the hot oil delivery pump.
[0006] Furthermore, there are three oil heating barrels, which are respectively arranged at the front section, middle section and tail section of the heating oil pipe, and the oil inlet end of the hot oil delivery pump is connected to the oil heating barrel in the middle section.
[0007] Furthermore, the plurality of branch pipes are evenly spaced apart in the axial direction of the heating oil pipe.
[0008] The beneficial effect of the present invention is that: by arranging a hot oil spray device, a portion of the hot oil can be evenly poured down from above the heat shrink tube, which can ensure that the hot oil can evenly cover and flow through the heat shrink tube floating on the oil surface in the heating oil pipe. The uniform hot oil flow ensures that all parts of the heat shrink tube can be subjected to the same heat effect, avoiding the problem of uneven expansion of the heat shrink tube caused by uneven heating. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0010] Figure 2 It is a structural schematic diagram of the heating oil pipe and the hot oil spraying device of the utility model.
[0011] Figure 3 yes Figure 2 Schematic diagram of the cross-section structure.
[0012] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION
[0013] In order to facilitate the understanding of the present invention, the present invention will be described in more comprehensive and detailed manner below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.
[0014] like Figures 1-4 As shown, the heating mechanism for positive pressure expansion of heat shrinkable tubes in this embodiment includes a frame 1, a heating oil pipe 2 fixedly mounted on the frame 1, a shield 3 covering the outside of the heating oil pipe 2, and one or more oil heating barrels 4 for heating medium oil, and a hot oil spraying device. Among them, the frame 1 serves as the supporting structure of the entire mechanism to ensure that all components can work stably. The heating oil pipe 2 is a pipeline for the flow of heating medium oil, and is also the place where the heat shrinkable tube is heated and expanded. The shield 3 covers the outside of the heating oil pipe 2, plays a role of protection and heat insulation, and ensures safe operation. The oil heating barrel 4 is used to store and heat the medium oil to ensure that the oil maintains a certain temperature during the circulation process. In this embodiment, the oil heating barrel 4 is arranged below the heating oil pipe 2. When the oil is heated, its temperature rises, its density decreases, the hot oil moves upward, and is connected to the bottom of the heating oil pipe 2 through the pipeline, forming an oil circulation.
[0015] In this embodiment, the hot oil spraying device includes a hot oil delivery pump 5. The oil inlet of the hot oil delivery pump 5 is connected to the oil heating barrel 4 via a pipeline, and the oil outlet is connected to a main spray pipe 6 located above the heating oil pipe 2 via a pipeline. The main spray pipe 6 is connected to a plurality of branch pipes connected to the top of the heating oil pipe 2. The branch pipes are evenly spaced axially along the heating oil pipe 2. The hot oil delivery pump 5 is responsible for extracting the heated oil from the oil heating barrel 4 and evenly delivering it to the top of the heating oil pipe 2 through the main spray pipe 6 and the branch pipes.
[0016] A bracket 8 is fixedly mounted axially within the heating oil pipe 2. The heat shrink tubing is positioned on bracket 8, and the sidewalls of bracket 8 are provided with multiple through-holes that connect to the inner cavity of the heating oil pipe 2. Bracket 8 supports the heat shrink tubing and ensures that it does not deform during the heating process. Multiple through-holes are provided on the sidewalls of bracket 8 to allow the heating medium oil to flow through, ensuring that the hot oil can fully contact the heat shrink tubing. A mesh slot 9 is provided on the top of bracket 8, and a number of oil-passing holes are distributed on the bottom plate of mesh slot 9. When hot oil enters the heating oil pipe 2 through branch pipes, multiple evenly arranged branch pipes transport the hot oil into mesh slot 9. By setting the oil-passing holes of appropriate apertures, the hot oil evenly drips from the oil-passing holes in mesh slot 9 onto the heat shrink tubing, making full contact with the heat shrink tubing and transferring heat to the heat shrink tubing, thereby evenly heating the heat shrink tubing floating on the oil surface.
[0017] As another embodiment, in this embodiment, a filter 7 is provided on the pipeline communicating with the oil inlet end of the hot oil delivery pump 5 , and impurities can be effectively removed through the filter 7 .
[0018] As another embodiment, in this embodiment, three oil heating barrels 4 are provided, arranged at the front, middle, and rear sections of the heating oil pipe 2, respectively. The oil inlet of the hot oil delivery pump 5 is connected to the oil heating barrel 4 in the middle section. By providing the oil heating barrels 4 at different positions on the heating oil pipe 2, the hot oil is ensured to maintain a relatively uniform temperature throughout the heating oil pipe 2, thereby improving heating efficiency and the heating quality of the heat shrink tubing.
[0019] Many modifications and other embodiments of the present invention will occur to those skilled in the art with the aid of the teachings presented in the foregoing description and the associated drawings. Therefore, it is to be understood that the present invention is not limited to the specific embodiments disclosed, and modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims
1. A heating mechanism for positive pressure expansion of a heat shrink tube, comprising a frame (1), a heating oil pipe (2) fixedly mounted on the frame (1), and a protective cover (3) covering the outside of the heating oil pipe (2), characterized in that: The invention also includes one or more oil heating barrels (4) for heating medium oil and a hot oil spraying device. The oil heating barrels (4) are arranged below the heating oil pipe (2) and are connected to the bottom of the heating oil pipe (2) through a pipeline. The hot oil spraying device includes a hot oil delivery pump (5). The oil inlet end of the hot oil delivery pump (5) is connected to the oil heating barrel (4) through a pipeline, and the oil outlet end is connected to a spraying main pipe (6) arranged above the heating oil pipe (2) through a pipeline. The spraying main pipe (6) ) is connected to a plurality of branch pipes connected to the top of the heating oil pipe (2), a bracket (8) is fixedly installed axially inside the heating oil pipe (2), a heat shrink tube is located on the bracket (8), a plurality of through holes connected to the inner cavity of the heating oil pipe (2) are opened on the side wall of the bracket (8), a mesh groove (9) is provided on the upper part of the bracket (8), a plurality of oil holes are distributed on the bottom plate of the mesh groove (9), and the hot oil entering through the branch pipe drips from the oil holes of the mesh groove (9).
2. A heating mechanism for positive pressure expansion of a heat shrinkable tube according to claim 1, characterized in that: A filter (7) is provided on a pipeline connected to the oil inlet end of the hot oil delivery pump (5).
3. The heating mechanism for positive pressure expansion of heat shrinkable tube according to claim 1, characterized in that: There are three oil heating barrels (4), which are respectively arranged at the front section, middle section and tail section of the heating oil pipe (2). The oil inlet end of the hot oil delivery pump (5) is connected to the oil heating barrel (4) in the middle section.
4. A heating mechanism for positive pressure expansion of a heat shrinkable tube according to claim 1, characterized in that: The plurality of branch pipes are evenly spaced apart in the axial direction of the heating oil pipe (2).