Improved sizing sleeve with multiple cooling water holes

Abstract

The utility model discloses an improved sizing sleeve containing a plurality of cooling water holes. The improved sizing sleeve comprises a cooling disc, a cooling sleeve, a sizing sleeve, a first cooling water hole, a cooling water inlet, a connecting hole, a cooling water inlet, a cooling water outlet, a spiral water tank, a second cooling water hole, a mounting disc and a third cooling water hole. A cooling disc containing a plurality of first cooling water holes is designed at the front end of the sizing sleeve for cooling, a cooling sleeve containing a plurality of second cooling water holes, a cooling water inlet and a cooling water outlet is designed at the middle section of the sizing sleeve for cooling, and a sizing sleeve containing a plurality of third cooling water holes is designed at the rear end of the sizing sleeve for cooling. Cooling water flows out of the multiple cooling water holes symmetrically and evenly distributed in the axis direction from the front end, the middle section to the rear end of the sizing sleeve to evenly cool a pipe blank, the cooling speed is increased, the cooling efficiency is improved, the cooling time is shortened, then the manufacturing efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe manufacturing, in particular to an improved sizing sleeve with a plurality of cooling water holes. Background Art

[0002] The sizing sleeve plays a role in cooling and shaping the pipe during the pipe production process. Only with good cooling effect, the later shrinkage of the pipe is small, the thickness is uniform, the aperture of the inner and outer walls of the pipe is reduced, the outer wall is smooth, and the shaping effect is good, thereby increasing the production speed and reducing the production cost. At present, plastic pipes mostly use vacuum sizing sleeves. After the pipe embryo enters the sizing device, it is cooled by spraying or immersion in the vacuum box. The cooling water on the outer surface of the conventional sizing sleeve is not sufficient and uniform. The cooling water cannot cool the outer surface of the pipe product, and most of the cooling water is sucked away by the vacuum pump behind. The cooling water left for the sizing sleeve is not enough to cool the entire pipe product, resulting in insufficient cooling of the outer wall of the pipe product, and the size and shape accuracy of the pipe and the good surface quality cannot be well guaranteed; and there are many unreasonable aspects in the structural design and cooling system of the sizing sleeve, resulting in poor cooling effect, slow sizing speed, high manufacturing cost, etc.

[0003] CN114248413A discloses a PPR sizing sleeve with a high-efficiency cooling method, including an extrusion device and a cooling device, the cooling device including a first cooling mechanism, a second cooling mechanism and a third cooling mechanism, a sizing copper sleeve is arranged in the cooling device, and the sizing copper sleeve runs through the second cooling mechanism, one end of the sizing copper sleeve is arranged in the first cooling mechanism, and the other end is arranged in the third cooling mechanism, and a plurality of cooling water tanks are arranged on the sizing copper sleeve. The key to this invention is to perform sufficient and efficient cooling in the whole process of cooling and shaping of the pipe, so as to increase the production speed and improve the product quality. However, there are the first, second and third cooling mechanisms, and the sizing sleeve extends from the first cooling mechanism to the second cooling mechanism to the third cooling mechanism. The cooling mechanism and the sizing sleeve are both relatively long, resulting in high manufacturing and production costs.

[0004] CN116834186A discloses a sizing sleeve and sizing device, which adopts a multi-stage cooling and vacuum structure design to achieve cooling-vacuum shaping-cooling-vacuum shaping alternately. The hot tube to be formed is cooled in the cooling zone and quickly enters the vacuum sizing zone. The tube is tightly adsorbed on the inner wall of the sizing sleeve under the action of vacuum, and then enters the next cooling zone for further cooling. As it enters the next vacuum shaping zone, the tube is cooled and then shaped. In this way, cooling-shaping is alternately performed to improve the shaping effect of the tube. Although this method achieves good cooling and shaping effects, for the production line, it is necessary to alternately arrange the cooling water system and vacuum shaping equipment, which has a large number of equipment and requirements, resulting in high manufacturing and production costs.

[0005] From the above information, it can be seen that the cooling effect of the sizing sleeve must be reasonably designed to achieve the ideal effect, especially the front end of the sizing sleeve; because the front end of the sizing sleeve is connected to the die head, and the temperature at the die head is about 180-260℃. If a faster cooling speed is to be achieved, the structure of the front end of the sizing sleeve and the cooling system needs to be redesigned. Summary of the invention

[0006] The utility model aims to solve the deficiencies of the prior art and to provide an improved sizing sleeve containing a plurality of cooling water holes.

[0007] In order to achieve the above object, the utility model provides the following technical solutions:

[0008] An improved sizing sleeve with multiple cooling water holes comprises a cooling disc, a cooling sleeve and a sizing sleeve.

[0009] The cooling disc is a hollow concave cylindrical copper disc, the inner diameter of the front end is larger than the inner diameter of the rear end, and the cross section at the port is a trapezoidal structure; the inner wall of the cooling disc is provided with a plurality of first cooling water holes symmetrically distributed along the axis along the circumferential direction, the first cooling water holes are circular small holes, and the outer wall of the cooling disc is also provided with a plurality of cooling water inlets symmetrically distributed along the axis along the circumferential direction, the cooling water inlets extend from the outer wall of the cooling disc to the inner wall of the cooling disc, and the cooling water inlets and the first cooling water holes are interconnected, and the cooling water inlets are screwed to the outer wall of the cooling disc by an external hexagonal nut and reinforced with a sealing ring. The circular inner wall at the other end of the external hexagonal nut is connected with a plastic buckle and reinforced with a rubber sealing ring, and the plastic buckle can be pressed to install and remove other cooling water pipes. The front plane of the cooling disc is provided with a plurality of connection holes symmetrically distributed along the axis along the circumferential direction near the edge, and the cooling disc and the cooling sleeve are threadedly connected at the connection holes with internal hexagonal nuts.

[0010] The cooling sleeve is a hollow cylindrical copper sleeve. The outer walls of the front and rear ends of the cooling sleeve are provided with a plurality of cooling water inlets and cooling water outlets symmetrically distributed along the axis in the circumferential direction. The cooling water inlet and cooling water outlet are detachably connected to other cooling water pipes. The cooling water inlet and cooling water outlet are screwed to the outer wall of the cooling sleeve by an external hexagonal nut and reinforced with a sealing ring. The circular inner wall at the other end of the external hexagonal nut is connected to a plastic buckle and reinforced with a rubber sealing ring, and the plastic buckle can be pressed to install and remove the cooling water pipe. The cooling water inlet and the cooling water outlet both extend from the outer wall of the cooling sleeve to the inner wall of the cooling sleeve; a plurality of annular spiral water grooves are provided on the inner wall of the cooling sleeve, and a plurality of second cooling water holes symmetrically distributed along the axis are provided on the spiral water groove along the circumferential direction, and the second cooling water holes are interconnected with the cooling water inlet and the cooling water outlet; a mounting disc is welded on the rear end of the cooling sleeve, and a plurality of mounting holes symmetrically distributed along the axis are provided at the edge of the mounting disc, which is threadedly connected to the sizing sleeve through a hexagonal nut.

[0011] The sizing sleeve is a hollow cylindrical copper sleeve. The sizing sleeve and the cooling sleeve are an integral hollow cylindrical structure with the same inner and outer diameters. The sizing sleeve is arranged inside a subsequent vacuum cooling system for spraying or immersion cooling. A plurality of third cooling water holes symmetrically distributed along the axis are provided on the outer wall of the sizing sleeve in the circumferential direction. The third cooling water holes are arranged at equal intervals along the central axis of the sizing sleeve, staggered and evenly distributed, and extend from the outer wall of the sizing sleeve to the inner wall, forming a through structure.

[0012] Preferably, the cooling disc, the first cooling water hole, the connecting hole, the cooling sleeve, the spiral water groove, the second cooling water hole, the mounting disc and the sizing sleeve are all symmetrically arranged with the central axis of the sizing sleeve as the center.

[0013] By adopting the above technical solution, the main components of the sizing sleeve can be located on the same horizontal line, so as to form a uniformly distributed structure.

[0014] Preferably, the inner diameter of the cooling sleeve is 2 mm smaller than the inner diameter of the cooling disc.

[0015] By adopting the above technical solution, cooling water can flow out from the first cooling water hole into the gap between the cooling disc and the cooling sleeve, thereby cooling the cooling disc and the cooling sleeve simultaneously.

[0016] Preferably, the number of the first cooling water holes is 24, and the diameter is 1.5-3 mm.

[0017] Preferably, the number of the cooling water inlets and cooling water outlets is 4, 6 or 8.

[0018] By adopting the above technical solution, the cooling water can be evenly distributed when flowing into and out of the cooling sleeve, forming a stable water flow; at the same time, the flow speed and circulation speed of the cooling water in the cooling sleeve are accelerated, thereby accelerating the cooling speed.

[0019] Preferably, the third cooling water hole is a circular through hole, a rectangular through hole, or a square through hole.

[0020] The beneficial effects of the utility model are:

[0021] By adopting the above technical solution, a cooling disc with multiple first cooling water holes is designed at the front end of the sizing sleeve for cooling, a cooling sleeve with multiple second cooling water holes, a cooling water inlet and a cooling water outlet is designed at the middle section of the sizing sleeve for cooling, and a sizing sleeve with multiple third cooling water holes is designed at the rear end of the sizing sleeve for cooling. From the front end, middle section to the rear end of the sizing sleeve, there are multiple cooling water holes symmetrically and evenly distributed along the axial direction to uniformly cool the tube blank, accelerate the cooling speed, improve the cooling efficiency, shorten the cooling time, thereby improving the manufacturing efficiency and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0023] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0024] Figure 1 The utility model is a schematic cross-sectional structure diagram of an improved sizing sleeve containing multiple cooling water holes.

[0025] Figure 1As shown in: 1. cooling disc, 2. cooling sleeve, 3. sizing sleeve, 11. first cooling water hole, 12. cooling water inlet, 13. connecting hole, 21. cooling water inlet, 22. cooling water outlet, 23. spiral water groove, 24. second cooling water hole, 25. mounting disc, 31. third cooling water hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The terms such as "left", "right", "upper", "lower" etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships shall be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0028] Reference Figure 1 The utility model discloses an improved sizing sleeve containing multiple cooling water holes, including a cooling disc 1, a cooling sleeve 2, a sizing sleeve 3, a first cooling water hole 11, a cooling water inlet 12, a connecting hole 13, a cooling water inlet 21, a cooling water outlet 22, a spiral water groove 23, a second cooling water hole 24, a mounting disc 25, and a third cooling water hole 31.

[0029] The working process of cooling water in cooling disc 1 is as follows:

[0030] 1. The cooling water flows into the cooling disc 1 from the cooling water inlet 12, and after reaching the inner wall of the cooling disc 1, it reaches the first cooling water hole 11 in the circumferential direction through the interconnecting structure;

[0031] 2. The cooling water flows out from the first cooling water hole 11 into the gap between the cooling disc 1 and the cooling sleeve 2, forming a circle of cooling water ring, cooling the front ends of the cooling disc 1 and the cooling sleeve 2 at the same time;

[0032] 3. The cooling water flows out of the cooling jacket 2 along with the raw material.

[0033] The working process of cooling water in cooling sleeve 2 is as follows:

[0034] 1. The cooling water flows from the cooling water inlet 21 into the inner wall of the cooling sleeve 2, and reaches the second cooling water hole 24 on the spiral water groove 23 in the circumferential direction through the interconnecting structure;

[0035] 2. The cooling water flows out from the second cooling water hole 24 into the spiral water groove 23, cooling the raw material that is pushed forward along the spiral water groove 23, and at the same time, the raw material is pushed forward along the spiral water groove 23;

[0036] 3. When the cooling water reaches the cooling water outlet 22, it is pumped out from the cooling water outlet 22 by another vacuum pump.

[0037] The working process of cooling water in the sizing sleeve 3 is as follows:

[0038] 1. After the raw material passes through the cooling disc 1 and the cooling sleeve 2, it is cooled and initially sized to form a tube billet, and then the tube billet enters the sizing sleeve 3 inside the vacuum cooling system;

[0039] 2. The cooling water is sprayed onto the surface of the sizing sleeve 3, or the sizing sleeve 3 is immersed, and the cooling water can enter the inner wall surface of the sizing sleeve 3 from the third cooling water hole 31 to cool the tube blank;

[0040] 3. The cooling water and the tube are pushed forward along the sizing sleeve 3 to sizing and shaping the tube.

[0041] Of course, the embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An improved sizing sleeve with multiple cooling water holes, characterized in that: It comprises a cooling disc (1), a cooling sleeve (2) and a sizing sleeve (3); The cooling disc (1) is a hollow concave cylindrical copper disc, the inner diameter of the front end of which is larger than the inner diameter of the rear end, and the cross section at the port is a trapezoidal structure; a plurality of first cooling water holes (11) are arranged along the circumferential direction on the inner wall of the cooling disc (1) and are symmetrically distributed along the axis, and the first cooling water holes (11) are circular small holes; a plurality of cooling water inlets (12) are also arranged along the circumferential direction on the outer wall of the cooling disc (1) and are symmetrically distributed along the axis, and the cooling water inlets (12) extend from the outer wall of the cooling disc (1) to the inner wall of the cooling disc (1), and the cooling water inlets (12) and the first cooling water holes (11) are symmetrically distributed along the axis. 11) are interconnected structures; the cooling water inlet (12) is screwed to the outer wall of the cooling disc (1) by an external hexagonal nut and reinforced with a sealing ring; the circular inner wall of the other end of the external hexagonal nut is connected to a plastic buckle and reinforced with a rubber sealing ring, and the plastic buckle can be pressed to install and remove other cooling water pipes; the front end plane of the cooling disc (1) is provided with a plurality of connection holes (13) symmetrically distributed along the axis in the circumferential direction near the edge, and the cooling disc (1) and the cooling sleeve (2) are threadedly connected at the connection hole (13) by an internal hexagonal nut; The cooling sleeve (2) is a hollow cylindrical copper sleeve. The outer walls of the front and rear ends of the cooling sleeve (2) are respectively provided with a plurality of cooling water inlets (21) and cooling water outlets (22) symmetrically distributed along the axis in the circumferential direction. The cooling water inlet (21) and cooling water outlet (22) are both detachably connected to other cooling water pipes. The cooling water inlet (21) and cooling water outlet (22) are screwed to the outer wall of the cooling sleeve (2) by an external hexagonal nut and reinforced by a sealing ring. The circular inner wall at the other end of the external hexagonal nut is connected to a plastic buckle and reinforced by a rubber sealing ring. At the same time, the plastic buckle can be pressed to install and remove the cooling water pipe. The cooling water inlet (21) and the cooling water outlet (22) both extend from the outer wall of the cooling sleeve (2) to the inner wall of the cooling sleeve (2); a plurality of annular spiral water grooves (23) are provided on the inner wall of the cooling sleeve (2); a plurality of second cooling water holes (24) symmetrically distributed along the axis are provided on the spiral water grooves (23) along the circumferential direction; the second cooling water holes (24) are interconnected with the cooling water inlet (21) and the cooling water outlet (22); a mounting disc (25) is welded on the rear end of the cooling sleeve (2); a plurality of mounting holes symmetrically distributed along the axis are provided at the edge of the mounting disc (25), and the mounting disc (25) is threadedly connected to the sizing sleeve (3) via a hexagon socket nut; The sizing sleeve (3) is a hollow cylindrical copper sleeve. The sizing sleeve (3) and the cooling sleeve (2) are hollow cylindrical integral structures with the same inner and outer diameters. The sizing sleeve (3) is arranged inside a subsequent vacuum cooling system for spraying or immersion cooling. A plurality of third cooling water holes (31) are opened on the outer wall of the sizing sleeve (3) along the circumferential direction and are symmetrically distributed along the axis. The third cooling water holes (31) are arranged at equal intervals along the central axis of the sizing sleeve (3), are evenly distributed in an interlaced manner, and extend from the outer wall of the sizing sleeve (3) to the inner wall, forming a through structure.

2. The improved sizing sleeve with multiple cooling water holes according to claim 1, characterized in that: The cooling disc (1), the first cooling water hole (11), the connecting hole (13), the cooling sleeve (2), the spiral water groove (23), the second cooling water hole (24), the mounting disc (25), and the sizing sleeve (3) are all arranged symmetrically about the central axis with the central axis of the sizing sleeve as the center of the circle.

3. The improved sizing sleeve with multiple cooling water holes according to claim 1, characterized in that: The inner diameter of the cooling sleeve (2) is 2 mm smaller than the inner diameter of the cooling disc (1).

4. The improved sizing sleeve with multiple cooling water holes according to claim 1, characterized in that: The number of the first cooling water holes (11) is 24, and the diameter is 1.5-3 mm.

5. The improved sizing sleeve with multiple cooling water holes according to claim 1, characterized in that: The number of the cooling water inlets (21) and the cooling water outlets (22) is 4, 6 or 8.

6. The improved sizing sleeve with multiple cooling water holes according to claim 1, characterized in that: The third cooling water hole (31) is a circular through hole, a rectangular through hole, or a square through hole.

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