PVC transparent line pipe sizing sleeve

Abstract

The utility model relates to a PVC (polyvinyl chloride) transparent line pipe sizing sleeve which is characterized by comprising a main body and a cooling device sleeved on the main body, a through hole for a pipe to pass through is formed in the center of the main body, and the main body comprises a cooling section connected with a cooling device and an adsorption section connected with the cooling section; a plurality of adsorption hole groups are uniformly formed in the circumference of the outer surface of the adsorption section, and each adsorption hole group comprises a plurality of adsorption holes which are spirally distributed along the outer surface of the adsorption section. A PVC transparent pipe enters the main body from the cooling section to be primarily cooled and then enters the adsorption section to be fully cooled, a plurality of adsorption hole groups are uniformly formed in the circumference of the adsorption section, and each adsorption hole group comprises a plurality of adsorption holes spirally distributed along the outer surface of the adsorption section, so that the adsorption holes are distributed all over the cooling section in a spiral arrangement manner; the number of times of frequent contact between the same position of the pipe surface and the adsorption holes in the same straight line is reduced, friction and scraping are reduced, the probability of line marks on the pipe surface is reduced, and production quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe production, and more specifically to a PVC transparent wire pipe sizing sleeve. Background Art

[0002] Because the formula of PVC transparent pipe is different from that of traditional products, the surface viscosity of PVC transparent pipe melt is very high after leaving the mold. In the existing vacuum adsorption cooling equipment, the traditional slotted sizing sleeve is generally used. The circumferential area of ​​the air slot of this sizing sleeve structure is large. When it is used in the production of PVC transparent pipe, due to its high surface viscosity, the pipe is easy to block the entrance when entering the sizing sleeve, and the friction between the pipe surface and the inner wall of the sizing sleeve and the air slot is also large. The pipe surface is often partially sucked into the air slot or blocked, resulting in uneven vacuum adsorption at various places on the pipe surface, and it is very easy to have the situation that the adsorption strength is too large or too small, and there is a large volatility, which will cause the instability of the diameter of the pipe after cooling; at the same time, the positions of the air slots of the existing sizing sleeve are linearly distributed along the axis. When the vacuum adsorption strength is too large, the outer surface of the pipe is scratched many times by different air slots distributed in a linear manner at the same position, which is easy to produce line marks, resulting in poor production and a relatively low product production qualification rate. Utility Model Content

[0003] The utility model aims to overcome the defect in the prior art that line marks are easily generated on the PVC transparent pipe after the pipe is cooled during vacuum adsorption cooling. The utility model provides a PVC transparent wire pipe sizing sleeve, optimizes the air groove of the sizing sleeve, and avoids line marks on the pipe surface.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a PVC transparent wire tube sizing sleeve, comprising: a main body and a cooling device sleeved on the main body; a through hole for the pipe to pass through is provided in the center of the main body, and the main body comprises a cooling section connected to the cooling device and an adsorption section connected to the cooling section; a plurality of groups of adsorption hole groups are evenly arranged on the circumference of the outer surface of the adsorption section, and each group of adsorption hole groups respectively comprises a plurality of adsorption holes spirally distributed along the outer surface of the adsorption section.

[0005] The sizing sleeve is arranged on the vacuum adsorption cooling equipment. When the pipe is cooled, it enters the main body through the through hole from one end of the cooling section, first undergoes preliminary cooling in the cooling section to quickly cool the surface of the pipe, and then enters the adsorption section for sufficient cooling, so that the surface of the pipe is completely cooled and formed. The adsorption section is provided with a plurality of adsorption hole groups evenly arranged along the circumference of the outer surface of the adsorption section, each adsorption hole group includes a plurality of adsorption holes, and the adsorption holes in each adsorption hole group are distributed along a spiral line on the outer surface of the adsorption section. Compared with the existing scheme of straight-line arrangement of air grooves or adsorption holes, the main body of the scheme greatly reduces the number of adsorption holes located in the same straight-line direction, avoids the situation where the adsorption holes in the same straight-line direction rub the same position of the pipe too much when the pipe passes, thereby avoiding the appearance of line marks on the surface of the pipe, and the distance between the adsorption holes located in the same straight-line direction when the spiral arrangement is relatively far, which further reduces the probability of line marks on the surface of the pipe and improves the production quality.

[0006] Preferably, the hole area of ​​the adsorption hole is less than or equal to one tenth of the hole area of ​​the through hole.

[0007] Reduce the area of ​​the adsorption holes and increase the number of adsorption holes, thereby reducing the situation where the pipe surface is partially sucked into the adsorption holes while ensuring that the overall adsorption strength meets the cooling requirements, and further reducing the situation where line marks appear on the pipe surface.

[0008] Preferably, no less than 8 groups of adsorption hole groups are evenly arranged circumferentially on the outer surface of the adsorption section.

[0009] No less than 8 adsorption hole groups are set to ensure the overall adsorption strength, and the adsorption holes in each adsorption hole group are evenly arranged according to the situation, and can be arranged in a circular alignment or a circular cross arrangement. For example, when the number of adsorption hole groups is large, the adsorption holes of adjacent adsorption hole groups can be staggered so that adjacent adsorption holes are located on different circular sections, thereby increasing the density of the adsorption holes and ensuring the overall adsorption strength.

[0010] Preferably, the adsorption holes are circular.

[0011] The circular adsorption holes have smoother edge transitions than the strip holes, which can further reduce the friction with the pipe surface, and the circular holes are also easy to process.

[0012] Preferably, the main body adopts a substrate with high thermal conductivity and low friction coefficient.

[0013] The main body adopts a substrate with high thermal conductivity and low friction coefficient to improve cooling efficiency and further reduce friction with the pipe surface; specifically, the thermal conductivity of the selected substrate is greater than 100W / (m·k) and the friction coefficient is less than 0.2 when there is no lubrication, such as copper.

[0014] Preferably, a guide surface is provided at the end of the cooling section, and the inclination angle of the guide surface is greater than or equal to 4° and less than or equal to 7.5°.

[0015] The guide surface is arranged at the end of the cooling section, that is, at the entrance of the pipe, and the guide surface is connected to the through hole. The larger the inclination angle of the guide surface, the smaller the angle between the guide surface and the through hole, and the easier it is for the pipe to be scratched or stuck when passing through. Therefore, the inclination angle of the guide surface is set to be greater than or equal to 4° and less than or equal to 7.5°, so as to ensure the guiding effect while avoiding the pipe with high viscosity from getting stuck on the guide surface.

[0016] Preferably, the cooling device comprises an outer cooling jacket sleeved on the cooling section, and fluid connectors respectively installed on both sides of the outer cooling jacket; the inner side surface of the outer cooling jacket is provided with a first cooling groove for circulating a heat exchange medium.

[0017] The heat exchange medium flows into the outer cooling jacket from one of the fluid joints, then exchanges heat and cools the cooling section, and then flows out from another fluid joint to achieve cooling. Furthermore, one of the fluid joints is connected to an oil cooler, and the oil cooler is used to input cold oil with stable temperature into the first cooling groove of the outer cooling jacket, while the temperature difference of the cold oil is controlled within plus or minus 2 degrees, to ensure the initial cooling stability of the pipe after entering the main body, to prevent the cooling fluctuation from causing the wall thickness deviation of the pipe at different time periods, and to ensure the cooling effect of the cooling section. Furthermore, the first cooling groove is an annular groove, which is arranged around the cooling section.

[0018] Preferably, a second cooling groove in contact with the heat exchange medium is provided on the outer side surface of the cooling section, and the first cooling groove and the second cooling groove together form a cooling cavity for circulating the heat exchange medium.

[0019] The second cooling groove and the first cooling groove together form a cooling cavity, and the heat exchange medium enters the cooling cavity through the fluid joint to cool the pipe; further, the second cooling groove is also an annular groove.

[0020] Preferably, the width of the second cooling groove is greater than 0.8 times the diameter of the through hole and less than 1.5 times the diameter of the through hole.

[0021] The width of the second cooling groove affects the cooling effect of the cooling section. If the width is too short, it will lead to insufficient cooling, while if the width is too long, it will easily cause excessive cooling and hardening of the product, resulting in pipe jamming problems. After simulation tests, it was verified that when the width of the second cooling groove is greater than 0.8 times the diameter of the through hole and less than 1.5 times the diameter of the through hole, the cooling effect is best; further, the width of the second cooling groove is consistent with the width of the first cooling groove.

[0022] Preferably, the external cooling sleeve is threadedly connected to the cooling section.

[0023] The external cooling sleeve is connected to the cooling section by threads, which ensures the sealing of the external cooling sleeve and facilitates the installation, disassembly and maintenance of the external cooling sleeve; further, a number of sealing rings are provided between the external cooling sleeve and the cooling section to fully ensure the sealing.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The PVC transparent pipe enters the main body from the cooling section for preliminary cooling, and then enters the adsorption section for full cooling. Multiple groups of adsorption hole groups are evenly arranged on the circumference of the adsorption section. Each group of adsorption hole groups contains multiple adsorption holes distributed spirally along the outer surface of the adsorption section, so that the adsorption holes are arranged in a spiral manner throughout the cooling section, reducing the number of times the same position on the pipe surface frequently contacts the adsorption holes located on the same straight line, reducing friction and scratches, reducing the probability of line marks on the pipe surface, and improving production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a PVC transparent wire tube sizing sleeve of the utility model;

[0027] Figure 2 This is a schematic structural diagram of a cooling device for a PVC transparent wire tube sizing sleeve of the utility model;

[0028] Figure 3 It is a structural schematic diagram of the main body of a PVC transparent wire tube sizing sleeve of the utility model;

[0029] Figure 4 The utility model is a schematic diagram of a guide surface angle, a second cooling groove width and a through hole diameter of a PVC transparent wire tube sizing sleeve.

[0030] In the figure: 1. main body; 2. cooling device; 3. cooling section; 4. adsorption section; 5. adsorption holes; 6. guide surface; 7. outer cooling sleeve; 8. fluid joint; 9. first cooling groove; 10. second cooling groove; 11. cooling cavity. DETAILED DESCRIPTION

[0031] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0034] Example 1

[0035] like Figure 1 As shown, a PVC transparent wire tube sizing sleeve comprises: a main body 1 and a cooling device 2 sleeved on the main body 1; a through hole for the pipe to pass through is provided at the center of the main body 1, and the main body 1 comprises a cooling section 3 connected to the cooling device 2 and an adsorption section 4 connected to the cooling section 3; a plurality of adsorption hole groups are evenly arranged on the circumference of the outer surface of the adsorption section 4, and each adsorption hole group comprises a plurality of adsorption holes 5 spirally distributed along the outer surface of the adsorption section 4.

[0036] The sizing sleeve is arranged on the vacuum adsorption cooling equipment. When the pipe is cooled, it enters the main body 1 through the through hole from one end of the cooling section 3, first undergoes preliminary cooling in the cooling section 3 to quickly cool the surface of the pipe, and then enters the adsorption section 4 for sufficient cooling, so that the surface of the pipe is completely cooled and formed. The adsorption section 4 is provided with a plurality of adsorption hole groups evenly arranged along the circumference of the outer surface of the adsorption section 4, each adsorption hole group includes a plurality of adsorption holes 5, and the adsorption holes 5 in each adsorption hole group are distributed along a spiral line on the outer surface of the adsorption section 4. Compared with the existing scheme of linear arrangement of air grooves or adsorption holes, the main body 1 of the scheme greatly reduces the number of adsorption holes 5 located in the same linear direction, avoiding the situation where the adsorption holes 5 in the same linear direction rub the same position of the pipe too much when the pipe passes, thereby avoiding the appearance of line marks on the surface of the pipe, and the distance between the adsorption holes 5 located in the same linear direction when the spiral arrangement is relatively far, which further reduces the probability of line marks on the surface of the pipe and improves the production quality.

[0037] like Figure 1 As shown, a spiral auxiliary line is drawn on the outer surface of the main body 1, and all the adsorption holes 5 located on the same spiral auxiliary line form a single adsorption hole group.

[0038] The beneficial effects of this embodiment are as follows: the PVC transparent pipe enters the main body 1 from the cooling section 3 for preliminary cooling, and then enters the adsorption section 4 for full cooling. A plurality of adsorption hole groups are evenly arranged on the circumference of the adsorption section 4, and each adsorption hole group includes a plurality of adsorption holes 5 spirally distributed along the outer surface of the adsorption section 4, so that the adsorption holes 5 are distributed throughout the cooling section 3 in a spiral arrangement, reducing the number of times the same position on the pipe surface frequently contacts the adsorption holes 5 located on the same straight line, reducing friction and scratches, reducing the probability of line marks on the pipe surface, and improving production quality.

[0039] Example 2

[0040] like Figure 1-4 As shown, based on Example 1, the difference from Example 1 is that:

[0041] The hole area of ​​the adsorption hole 5 is less than or equal to one tenth of the hole area of ​​the through hole. No less than 8 groups of adsorption holes are evenly arranged on the outer surface of the adsorption section 4. The adsorption hole 5 is circular. The main body 1 adopts a substrate with high thermal conductivity and low friction coefficient. Figure 3-4 As shown, a guide surface 6 is provided at the end of the cooling section 3, and the inclination angle of the guide surface 6 is greater than or equal to 4° and less than or equal to 7.5°.

[0042] Reduce the area of ​​the adsorption holes 5 and increase the number of adsorption holes 5 at the same time, thereby reducing the situation where the surface of the pipe is partially sucked into the adsorption holes 5 while ensuring that the overall adsorption strength meets the cooling requirements, and further reducing the situation where line marks appear on the surface of the pipe. Set up no less than 8 groups of adsorption hole groups to ensure the overall adsorption strength, and the adsorption holes 5 in each group of adsorption hole groups are evenly arranged according to the situation, and can be arranged in a circular alignment or a circumferential cross arrangement. For example, when the number of adsorption hole groups is large, the adsorption holes 5 of adjacent adsorption hole groups can be staggered so that adjacent adsorption holes 5 are located on different circumferential sections, thereby increasing the density of the adsorption holes 5 and ensuring the overall adsorption strength. The circular adsorption holes 5 have a smoother transition edge than the strip-shaped holes, which can further reduce the friction with the surface of the pipe, and the circular holes are also easy to process. Specifically, in this embodiment, the sizing sleeve structure is respectively applied to the cooling work of PVC transparent pipes with a diameter of 16mm-32mm. The pipes with different diameters are provided with the main body 1 with through holes of different diameters, and the diameter of the adsorption hole 5 is controlled within the range of 1.2mm-1.5mm. Specifically, in this embodiment, according to the different diameters of the pipes, the number of adsorption hole groups is set between 8 and 15 groups, that is, under the same circumferential section, the angle range between the axes of the adsorption holes 5 is controlled between 24° and 45°.

[0043] The main body 1 adopts a substrate with high thermal conductivity and low friction coefficient to improve the cooling efficiency and further reduce the friction with the surface of the pipe; specifically, the thermal conductivity of the selected substrate is greater than 100W / (m·k), and the friction coefficient is less than 0.2 when there is no lubrication, such as copper. The guide surface 6 is arranged at the end of the cooling section 3, that is, at the entrance of the pipe. The guide surface 6 is connected to the through hole. The larger the inclination angle of the guide surface 6, the smaller the angle between the guide surface 6 and the through hole, and the easier it is for the pipe to be scratched or stuck when passing through. Therefore, the inclination angle of the guide surface 6 is set to be greater than or equal to 4° and less than or equal to 7.5°, so as to ensure the guiding effect while preventing the pipe with high viscosity from getting stuck on the guide surface 6. Figure 4 As shown in the figure, angle a is the schematic inclination angle of the guide surface 6.

[0044] The remaining features and working principles of this embodiment are consistent with those of Embodiment 1.

[0045] Example 3

[0046] like Figure 2-4 As shown, based on Example 1 or Example 2, Example 1 or Example 2 is further limited, and the difference is that:

[0047] Figure 2 As shown, the cooling device 2 includes an outer cooling jacket 7 sleeved on the cooling section 3, and fluid connectors 8 respectively installed on both sides of the outer cooling jacket 7; the inner side of the outer cooling jacket 7 is provided with a first cooling groove 9 for circulating a heat exchange medium. Figure 3 As shown, a second cooling groove 10 in contact with the heat exchange medium is provided on the outer surface of the cooling section 3, and the first cooling groove 9 and the second cooling groove 10 together form a cooling cavity 11 for circulating the heat exchange medium. Figure 4 As shown, the width of the second cooling groove 10 is greater than 0.8 times the diameter of the through hole and less than 1.5 times the diameter of the through hole. The outer cooling sleeve 7 is threadedly connected to the cooling section 3.

[0048] The heat exchange medium flows into the outer cooling jacket 7 from one of the fluid joints 8, and then exchanges heat and cools the cooling section 3, and then flows out from another fluid joint 8 to achieve cooling. Further, one of the fluid joints 8 is connected to an oil cooler, and the oil cooler is used to input temperature-stable cold oil into the first cooling groove 9 of the outer cooling jacket 7, and at the same time, the temperature difference of the cold oil is controlled within plus or minus 2 degrees, so as to ensure the initial cooling stability of the pipe after entering the main body 1, prevent the cooling fluctuation from causing the wall thickness deviation of the pipe at different time periods, and ensure the cooling effect of the cooling section 3. Further, the first cooling groove 9 is an annular groove, which is arranged around the cooling section 3. The second cooling groove 10 and the first cooling groove 9 together form a cooling cavity 11, and the heat exchange medium enters the cooling cavity 11 through the fluid joint 8 to cool the pipe; further, the second cooling groove 10 is also an annular groove. The width of the second cooling groove 10 affects the cooling effect of the cooling section 3. If the width is too short, it will lead to insufficient cooling, while if the width is too long, it will easily cause the product to be overcooled and hardened, resulting in a pipe jam problem. After simulation tests, it was verified that when the width of the second cooling groove 10 is greater than 0.8 times the diameter of the through hole and less than 1.5 times the diameter of the through hole, the cooling effect is best; further, the width of the second cooling groove 10 is consistent with the width of the first cooling groove 9. The outer cooling sleeve 7 is connected to the cooling section 3 by threads, which ensures the sealing of the outer cooling sleeve 7 and facilitates the installation, disassembly and maintenance of the outer cooling sleeve 7; further, a number of sealing rings are provided between the outer cooling sleeve 7 and the cooling section 3 to fully ensure the sealing.

[0049] like Figure 4 As shown in the figure, L represents the width of the second cooling groove 10, and D represents the diameter of the through hole, that is, 0.8D≤L≤1.5D.

[0050] Furthermore, in this embodiment, two fluid connectors 8 are respectively located at the top and bottom of the external cooling jacket 7 .

[0051] The rest of the working principle and working process of this embodiment are consistent with those of Embodiment 1 or Embodiment 2.

[0052] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A PVC transparent wire tube sizing sleeve, characterized in that: include: A main body (1) and a cooling device (2) mounted on the main body (1); a through hole for a pipe to pass through is provided at the center of the main body (1); the main body (1) comprises a cooling section (3) for connecting to the cooling device (2) and an adsorption section (4) connected to the cooling section (3); a plurality of adsorption hole groups are evenly arranged on the circumference of the outer surface of the adsorption section (4), and each adsorption hole group comprises a plurality of adsorption holes (5) distributed in a spiral along the outer surface of the adsorption section (4).

2. A PVC transparent wire tube sizing sleeve according to claim 1, characterized in that: The hole area of ​​the adsorption hole (5) is less than or equal to one tenth of the hole area of ​​the through hole.

3. A PVC transparent wire tube sizing sleeve according to claim 2, characterized in that: No less than 8 groups of adsorption hole groups are evenly arranged on the circumference of the outer surface of the adsorption section (4).

4. The PVC transparent wire tube sizing sleeve according to claim 1, characterized in that: The adsorption holes (5) are circular.

5. The PVC transparent wire tube sizing sleeve according to claim 1, characterized in that: The main body (1) adopts a substrate with high thermal conductivity and low friction coefficient.

6. The PVC transparent wire tube sizing sleeve according to claim 1, characterized in that: A guide surface (6) is provided at the end of the cooling section (3), and the inclination angle of the guide surface (6) is greater than or equal to 4° and less than or equal to 7.5°.

7. The PVC transparent wire tube sizing sleeve according to claim 1, characterized in that: The cooling device (2) comprises an external cooling jacket (7) mounted on the cooling section (3), and fluid connectors (8) respectively mounted on both sides of the external cooling jacket (7); the inner side surface of the external cooling jacket (7) is provided with a first cooling groove (9) for circulating a heat exchange medium.

8. The PVC transparent wire tube sizing sleeve according to claim 7, characterized in that: A second cooling groove (10) in contact with a heat exchange medium is provided on the outer side of the cooling section (3); the first cooling groove (9) and the second cooling groove (10) together form a cooling cavity (11) for circulating the heat exchange medium.

9. A PVC transparent wire tube sizing sleeve according to claim 8, characterized in that: The width of the second cooling groove (10) is greater than 0.8 times the diameter of the through hole and less than 1.5 times the diameter of the through hole.

10. The PVC transparent wire tube sizing sleeve according to claim 7, characterized in that: The external cooling sleeve (7) is threadedly connected to the cooling section (3).

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