CN214395409U - Improved PVC-O radial stretching device - Google Patents
Improved PVC-O radial stretching device Download PDFInfo
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- CN214395409U CN214395409U CN202120439089.7U CN202120439089U CN214395409U CN 214395409 U CN214395409 U CN 214395409U CN 202120439089 U CN202120439089 U CN 202120439089U CN 214395409 U CN214395409 U CN 214395409U
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- rotating shaft
- fan
- spiral blade
- radial
- blade
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Abstract
The utility model provides an improved PVC-O radial stretching device, which comprises an outer cylinder, a rotating shaft, a helical blade and a fan; the rotating shaft is positioned in the outer barrel and is coaxial with the outer barrel, the rotating shaft rotates around the central shaft of the rotating shaft, the spiral blade is spirally arranged on the outer side surface of the rotating shaft, the bottom end of the spiral blade is fixed on the rotating shaft, and the top end of the spiral blade extends to form a sheet structure parallel to the side surface of the rotating shaft; the fan is installed at the head end of rotation axis and is used for blowing to the tail end of rotation axis. The utility model discloses convenient operation evenly stretches and stereotypes the radial gradually of pipe, and props the in-process cooperation fan that expands at helical blade rotation for keep good ventilation condition and even temperature environment in the urceolus all the time, reach good radial tensile effect, thereby further strengthen the radial strength of PVC-O tubular product.
Description
Technical Field
The utility model relates to a production field of plastic tubular product especially relates to a radial stretching device of modified PVC-O.
Background
The PVC-O pipe is produced through special orientation process, and is produced through axial and radial stretching of PVC-U pipe produced through extrusion process, so that the long PVC chain molecules are arranged regularly in double axial direction to obtain high strength, high toughness, high shock resistance and antifatigue PVC pipe with performance superior to that of common PVC-U pipe.
The PVC pipe is easy to carry out axial stretching orientation in the forming process, but the axial stretching orientation has no significance to the performance of the pipe, because the strength of the pipe orientation is increased through the stretching orientation, but the radial (namely, circumferential) strength of the pipe is reduced, which is very harmful to the plastic pipe, because the hydraulic bursting strength of the pipe is greatly reduced, which is also the reason that the longitudinal shrinkage rate of the pipe is required to be less than or equal to 5% in the quality standard of the pipe. The ideal stretch orientation should be bi-directional, i.e., biaxial stretch orientation, which increases both the axial strength and the radial (i.e., hoop) strength of the pipe.
The axial stretching of PVC-O tubular product is easy to realize in prior art, but there is certain technical problem in the tensile realization of radial (being the hoop), and the homogeneity of the whole expansion of tubular product can not be guaranteed because of the defect of self structure to the expansion of tubular product of current radial expansion device for the tubular product after the drawing has the wall thickness inhomogeneous, and the body warp scheduling problem easily, has seriously influenced the use strength of tubular product.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects in the prior art and providing an improved PVC-O radial stretching device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an improved PVC-O radial stretching device comprises an outer cylinder, a rotating shaft, a helical blade and a fan; the outer cylinder is of an axially hollow cylindrical tubular structure, a central axis of the outer cylinder is parallel to a horizontal plane, the cylindrical rotating shaft is located inside the outer cylinder and is coaxial with the outer cylinder, the rotating shaft rotates around the central axis of the rotating shaft, the rotating shaft comprises a head end and a tail end which are opposite, the spiral blade is spirally mounted on the outer side surface of the rotating shaft, the spiral blade comprises a first end and a second end which are opposite, the first end is located at the head end of the rotating shaft, the second end is located at the tail end of the rotating shaft, the bottom end of the spiral blade is fixed on the rotating shaft, the top end of the spiral blade extends to be of a sheet structure parallel to the side surface of the rotating shaft, and the height of the first end of the spiral blade is smaller than the height of the second end of the spiral blade; the fan is installed at the head end of the rotating shaft and used for blowing air to the tail end of the rotating shaft.
Preferably, the included angle between the helical blade and the rotating shaft is 60-90 degrees.
Preferably, the height of the helical blade gradually increases from the first end to the second end and then remains unchanged after the height increases to a preset height.
Preferably, the second end of the helical blade has a blade length which remains constant in height which is at least one quarter of the length of the entire helical blade.
Preferably, the rotating shaft is provided with two opposite helical blades, and the two helical blades are fixed in a double-helix structure.
Preferably, the helical blade is detachably mounted on the rotating shaft.
Preferably, the fan is installed at the center of the head end of the rotating shaft and blows air in parallel to the tail end of the rotating shaft.
Preferably, the fan is a fan with adjustable blowing temperature.
Compared with the prior art, the beneficial effects of the utility model are that:
the plastic pipe blank enters from the head end of the outer cylinder, the tail end of the plastic pipe blank is sent out, after the pipe blank enters the inner part of the outer cylinder, the pipe blank is sleeved outside the helical blade on the rotating shaft, and the rotating shaft rotates to drive the helical blade on the rotating shaft to rotate; the pipe blank is continuously conveyed forwards in the rotating process of the rotating shaft, the pipe blank can be radially expanded in the rotating process of the helical blade, and the pipe blank is radially expanded to a preset height at the second end of the rotating blade and then is kept unchanged. The utility model discloses convenient operation evenly stretches and stereotypes the radial gradually of pipe, and props the in-process cooperation fan that expands at helical blade rotation for keep good ventilation condition and even temperature environment in the urceolus all the time, reach good radial tensile effect, thereby further strengthen the radial strength of PVC-O tubular product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic front view of an improved PVC-O radial stretching device;
FIG. 2 is a schematic diagram of a modified PVC-O radial stretching device in a right view direction.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 and 2 in combination, an improved PVC-O radial stretching apparatus includes an outer cylinder 1, a rotating shaft 2, a helical blade 3 and a fan 4; the outer cylinder 1 is a cylindrical structure which is hollow in the axial direction, the central axis of the outer cylinder 1 is parallel to the horizontal plane, a cylindrical rotating shaft 2 is positioned inside the outer cylinder 1 and is coaxial with the outer cylinder 1, the rotating shaft 2 rotates around the central axis of the rotating shaft 2, the rotating shaft 2 comprises a head end 21 and a tail end 22 which are opposite, a spiral blade 3 is spirally arranged on the outer side surface of the rotating shaft 2, the spiral blade 3 comprises a first end 31 and a second end 32 which are opposite, the first end 31 is positioned at the head end 21 of the rotating shaft 2, the second end 32 is positioned at the tail end 22 of the rotating shaft 2, the bottom end of the spiral blade 3 is fixed on the rotating shaft 2, the top end of the spiral blade 3 extends to be a sheet structure which is parallel to the side surface of the rotating shaft 2, and the first end 31 of the spiral blade 3 is shorter than the second end 32 of the spiral blade 3; the fan 4 is mounted at a head end 21 of the rotating shaft 2 and is configured to blow air toward a tail end 22 of the rotating shaft 2.
The plastic pipe blank enters from the head end 21 of the outer cylinder 1, the tail end 22 of the plastic pipe blank is sent out, after the pipe blank enters the inner part of the outer cylinder 1, the pipe blank is sleeved outside the helical blade 3 on the rotating shaft 2, and the rotating shaft 2 rotates to drive the helical blade 3 on the rotating shaft 2 to rotate; the pipe base is continuously carried forward in the rotation process of rotation axis 2, and helical blade 3 can radially strut the pipe base in the rotation process, radially strut to 32 pipe bases of second end of rotating blade and keep unchangeable after presetting the height, and rotate at helical blade 3 and strut bloated in-process cooperation fan 4 for keep good ventilation condition and even temperature environment in urceolus 1 all the time, reach good radial tensile effect.
In one embodiment, the included angle between the helical blade 3 and the rotating shaft 2 is 60-90 degrees, and when the fan 4 supplies air to the head end 21 of the rotating shaft 2 in the radial direction, the wind in the outer barrel 1 can be uniformly conveyed by matching with the rotation of the helical blade 3, and more uniform and stable temperature and ventilation conditions are kept when the pipe blank is stretched in the radial direction.
In one embodiment, the height of the helical blade 3 gradually increases from the first end 31 to the second end 32 to a predetermined height and then remains unchanged. Preferably, the length of the second end 32 of the helical blade 3, which is kept unchanged in height, accounts for at least one quarter of the length of the whole helical blade 3, so that the uniform thickness and the stable diameter of the tube blank after the tube blank is radially stretched can be ensured, and the performance of the tube blank is further improved.
In one embodiment, two opposite helical blades 3 are arranged on the rotating shaft 2, and the two helical blades 3 are fixed in a double-helix structure, so that better support is provided in the radial process of rotationally stretching the tube blank.
Preferably, helical blade 3 detachably installs on rotation axis 2, and the convenience is changed the helical blade 3 of different models according to actual conditions, adapts to the PVC-O tubular product of different pipe diameters.
In one embodiment, fan 4 is centrally mounted on head end 21 of rotating shaft 2 and supplies air in parallel to tail end 22 of rotating shaft 2. Preferably, the fan 4 is a fan 4 with adjustable blowing temperature, which provides better temperature condition and ventilation condition for radial stretching of the pipe, and helps to improve the radial strength of the pipe.
The utility model discloses convenient operation evenly stretches and stereotypes the tubular product of pipe radially gradually, and props the in-process cooperation fan that expands at helical blade rotation for keep good ventilation condition and even temperature environment in the urceolus all the time, reach good radial tensile effect, thereby further strengthen the radial strength of PVC-O tubular product.
The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.
Claims (8)
1. An improved PVC-O radial stretching device is characterized in that: comprises an outer cylinder, a rotating shaft, a helical blade and a fan; the outer cylinder is of an axially hollow cylindrical tubular structure, a central axis of the outer cylinder is parallel to a horizontal plane, the cylindrical rotating shaft is located inside the outer cylinder and is coaxial with the outer cylinder, the rotating shaft rotates around the central axis of the rotating shaft, the rotating shaft comprises a head end and a tail end which are opposite, the spiral blade is spirally mounted on the outer side surface of the rotating shaft, the spiral blade comprises a first end and a second end which are opposite, the first end is located at the head end of the rotating shaft, the second end is located at the tail end of the rotating shaft, the bottom end of the spiral blade is fixed on the rotating shaft, the top end of the spiral blade extends to be of a sheet structure parallel to the side surface of the rotating shaft, and the height of the first end of the spiral blade is smaller than the height of the second end of the spiral blade; the fan is installed at the head end of the rotating shaft and used for blowing air to the tail end of the rotating shaft.
2. The improved PVC-O radial stretching apparatus of claim 1, wherein: the included angle between the helical blade and the rotating shaft is 60-90 degrees.
3. The improved PVC-O radial stretching apparatus of claim 1, wherein: the height of the spiral blade gradually increases from the first end to the second end to a preset height and then keeps unchanged.
4. The improved PVC-O radial stretching apparatus of claim 3, wherein: the second end of the helical blade is kept at the same height, and the length of the blade accounts for at least one fourth of the length of the whole helical blade.
5. The improved PVC-O radial stretching apparatus of claim 1, wherein: two opposite helical blades are arranged on the rotating shaft and fixed in a double-helix structure.
6. The improved PVC-O radial stretching apparatus of claim 1, wherein: the helical blade is detachably mounted on the rotating shaft.
7. The improved PVC-O radial stretching apparatus of claim 1, wherein: the fan is installed in the center of the head end of the rotating shaft and supplies air to the tail end of the rotating shaft in parallel.
8. The improved PVC-O radial stretching apparatus of claim 1, wherein: the fan is a fan with adjustable blowing temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120439089.7U CN214395409U (en) | 2021-03-01 | 2021-03-01 | Improved PVC-O radial stretching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120439089.7U CN214395409U (en) | 2021-03-01 | 2021-03-01 | Improved PVC-O radial stretching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214395409U true CN214395409U (en) | 2021-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120439089.7U Active CN214395409U (en) | 2021-03-01 | 2021-03-01 | Improved PVC-O radial stretching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214395409U (en) |
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2021
- 2021-03-01 CN CN202120439089.7U patent/CN214395409U/en active Active
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