阅读说明：本技术 厚壁管生产系统 (Thick-walled pipe production system ) 是由 何海潮 柳兵 于 2020-12-07 设计创作，主要内容包括：本发明涉及一种厚壁管生产系统,厚壁管生产系统,包括模具装置,所述模具装置包括外部模具和内部模具,所述外部模具的内壁与所述内部模具的外壁之间形成料坯移动流道,所述料坯移动流道内设置有冷却分流环,所述冷却分流环的外壁与所述外部模具的内壁之间形成外分流道,所述冷却分流环的内壁与所述内部模具的外壁之间形成内分流道,所述冷却分流环的内部具有用于收纳冷却介质的空腔。该生产系统实现了管材内、外表面双重冷却,从而加快冷却速度；同时,该风冷装置对管材壁厚的控制起到了很好的作用,使得管材壁厚偏差大幅度减低,生产速度提升50%以上；也大大降低了对管材原料抗熔垂性能的要求。(The invention relates to a thick-wall pipe production system which comprises a mould device, wherein the mould device comprises an external mould and an internal mould, a material blank moving flow passage is formed between the inner wall of the external mould and the outer wall of the internal mould, a cooling splitter ring is arranged in the material blank moving flow passage, an external splitter passage is formed between the outer wall of the cooling splitter ring and the inner wall of the external mould, an internal splitter passage is formed between the inner wall of the cooling splitter ring and the outer wall of the internal mould, and a cavity for containing a cooling medium is arranged in the cooling splitter ring. The production system realizes double cooling of the inner surface and the outer surface of the pipe, thereby accelerating the cooling speed; meanwhile, the air cooling device plays a good role in controlling the wall thickness of the pipe, so that the wall thickness deviation of the pipe is greatly reduced, and the production speed is increased by more than 50%; but also greatly reduces the requirement on the anti-sagging performance of the raw materials of the pipe.)

1. Thick-walled pipe production system, including mold device (20), mold device includes outside mould (1) and inside mould (2), the inner wall of outside mould (1) with form material blank removal runner (3) between the outer wall of inside mould (2), its characterized in that, be provided with cooling flow distribution ring (4) in material blank removal runner (3), the outer wall of cooling flow distribution ring (4) with form outer flow distribution ring between the inner wall of outside mould (1), the inner wall of cooling flow distribution ring (4) with form interior flow distribution ring between the outer wall of inside mould (2), the inside of cooling flow distribution ring (4) has the cavity that is used for accomodating cooling medium.

2. The thick-walled pipe production system according to claim 1, further comprising a cooling transition sleeve (15) disposed on the two segments of the external mold (1), wherein the cooling diverter ring (4) is mounted on the cooling transition sleeve (14) through a plurality of connecting ribs, and the cooling transition sleeve (15) is provided with a coolant injection port (16) communicated with an inner cavity of the cooling diverter ring (4).

3. The thick-walled pipe production system according to claim 2, wherein the cooling manifold (4) circumferentially surrounds the inner mold (2) and the cooling manifold (4) has tapers at the front and rear ends thereof for flow distribution.

4. Thick-walled pipe production system according to claim 1, characterized in that the outer mould (1) comprises an outer die (8), the inner mould (2) comprises a core rod (9), a preform outlet (10) is formed between the inner wall of the outer die (8) and the core rod (9), a mounting hole is formed in the core rod (9), a cooling collar (5) is arranged in the mounting hole, and the cooling collar (5) is arranged coaxially with the outer wall of the core rod (9).

5. Thick wall pipe production system according to claim 4, wherein said cooling collar (5) is internally provided with a hollow tube having an inlet end (51) and an outlet end (52) and wound in a helical direction, said inlet end (51) and said outlet end (52) each extending obliquely radially inwards.

6. Thick-walled pipe production system according to claim 1, characterized in that the production system further comprises a cooling and sizing device (11), wherein the cooling and sizing device (11) comprises a vacuum box (14), an outer sizing sleeve (12) and an air-cooling unit, the outer sizing sleeve (12) is arranged in the vacuum box (14), the air-cooling unit comprises a wind shield (6) and an air pipe (7) which are connected in a penetrating way, and an annular channel for the pipe body extruded from the billet moving flow passage (3) to pass through is formed between the outer wall of the wind shield (6) and the inner wall of the outer sizing sleeve.

7. Thick wall pipe production system according to claim 6, wherein said air pipe (7) extends through and out from the axis of said inner mould (2).

8. Thick wall pipe production system according to claim 6, wherein said hood (6) is flared with a reduced mouth connected to said air pipe (7) and an enlarged mouth towards the axis of said outer sizing sleeve.

Technical Field

The invention relates to the technical field of pipe fitting production, in particular to a thick-wall pipe production system.

Background

At present, in the actual production of PE moulds, a shaping and cooling device for plastic pipes with smooth inner and outer wall surfaces is a production mode for cooling and sizing the pipes through an outer sizing sleeve arranged in a vacuum shaping box. By adopting the production mode, the working principle of the pipe forming and cooling is that the outer surface of the pipe is firstly cooled and shaped, then the pipe is cooled and shaped inwards gradually, and finally the inner wall of the pipe is cooled until the whole pipe wall is completely cooled and shaped. When the large-caliber thick-wall plastic pipe is produced by adopting the method, because the thermal conductivity of the plastic is poor, the cooling time required by shaping is long, the cooling shaping of the plastic pipe is often insufficient, and the phenomenon of melt sag can be caused, namely, because the molten plastic still exists before the plastic pipe is completely shaped and continues to flow to the horizontal lowest point of the pipe under the action of gravity, the plastic pipe with unequal wall thickness is formed. The overall performance of the pipe is seriously affected by the uneven wall thickness of the pipe. Meanwhile, due to the low cooling and shaping efficiency of the cooling mode, the improvement of the production speed of the plastic pipe is also restricted.

Disclosure of Invention

The invention aims to provide a thick-wall pipe production system, which realizes double cooling of the inner surface and the outer surface of a pipe, thereby accelerating the cooling speed; meanwhile, the air cooling device plays a good role in controlling the wall thickness of the pipe, so that the wall thickness deviation of the pipe is greatly reduced, and the production speed is increased by more than 50%; but also greatly reduces the requirement on the anti-sagging performance of the raw materials of the pipe.

In order to achieve the purpose, the invention provides the following technical scheme: thick-walled pipe production system, including the mold device, the mold device includes outside mould and inside mould, the inner wall of outside mould with form material blank removal runner between the outer wall of inside mould, be provided with the cooling splitter ring in the material blank removal runner, the outer wall of cooling splitter ring with form outer splitter channel between the inner wall of outside mould, the inner wall of cooling splitter ring with form interior splitter channel between the outer wall of inside mould, the inside of cooling splitter ring has the cavity that is used for accomodating cooling medium.

Optionally, the thick-walled pipe production system further comprises a cooling transition sleeve arranged on the two sections of the external mold, the cooling diverter ring is mounted on the cooling transition sleeve through a plurality of connecting ribs, and a refrigerant injection port communicated with an inner cavity of the cooling diverter ring is formed in the cooling transition sleeve.

Optionally, the cooling split-flow ring circumferentially surrounds the inner mold for a circle, and the front end and the rear end of the cooling split-flow ring are respectively provided with a cone for splitting.

Optionally, the outer mold includes an outer neck ring mold, the inner mold includes a core rod, a material blank outlet is formed between the inner wall of the outer neck ring mold and the core rod, a mounting hole is formed in the core rod, a cooling ring is arranged in the mounting hole, and the cooling ring and the outer wall of the core rod are coaxially arranged.

Optionally, a hollow tube with an inlet end and an outlet end is arranged inside the cooling coil cylinder and wound along a spiral line direction, and the inlet end and the outlet end both extend in a radial inward inclined manner.

Optionally, this production system still includes the cooling setting device, the cooling setting device includes vacuum box, outer sizing cover and air-cooling unit, outer sizing cover sets up in the vacuum box, the air-cooling unit is including through connection's fan housing and tuber pipe, the outer wall of fan housing with form the confession between the inner wall of outer sizing cover and follow the annular channel that the body that the material blank removal runner was extruded passes through.

Optionally, the air pipe passes through and extends out of the axis of the inner mold.

Optionally, the fan housing is in a horn shape with a necking and a flaring, the necking is connected with the air pipe, and the flaring faces to the axis of the outer sizing sleeve.

The invention has the beneficial effects that: the thick-wall pipe production system designed by the invention realizes double cooling of the inner surface and the outer surface of the pipe, thereby accelerating the cooling speed; meanwhile, the air cooling device plays a good role in controlling the wall thickness of the pipe, so that the wall thickness deviation of the pipe is greatly reduced, and the production speed is increased by more than 50%; but also greatly reduces the requirement on the anti-sagging performance of the raw materials of the pipe.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is a schematic structural view of a thick-walled pipe production system of the present invention;

FIG. 2 is a first schematic diagram of the cooling collar of the thick-walled pipe production system of the present invention;

fig. 3 is a schematic structural diagram of a cooling ring barrel in the thick-wall pipe production system according to the present invention.

Description of the drawings: 1. an outer mold; 2. an inner mold; 3. a material blank moving runner; 4. cooling the splitter ring; 5. cooling the ring barrel; 51. an inlet end; 52. 6, an outlet end, a fan cover; 7. an air duct; 8. an outer die; 9. a core mold; 10. a material blank outlet; 11. a cooling and shaping device; 12. an outer sizing sleeve; 14. a vacuum box; 15. cooling the transition sleeve; 16. a refrigerant inlet; 20. provided is a mold device.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. The "front side" direction in the specification refers to the left side in fig. 1, and conversely, the "rear side" in the specification refers to the right side in fig. 1.

As shown in fig. 1 to 3, a thick-wall pipe production system comprises a die device 20 and a cooling and shaping device 11, wherein the die device 20 is used for extruding a molten material, and the cooling and shaping device 11 is used for cooling an extruded pipe blank and enabling the inner diameter and the outer diameter of the pipe blank to reach standard values.

The mold device 20 includes an outer mold 1 and an inner mold 2, and a preform moving flow path 3 is formed between an inner wall of the outer mold 1 and an outer wall of the inner mold. The thick-wall pipe production system further comprises a cooling transition sleeve 15 arranged on the two sections of the external mold 1, a cooling diverter ring 4 is mounted on the cooling transition sleeve 14 through a plurality of connecting ribs, a cavity for containing a cooling medium is formed in the cooling diverter ring 4, and a refrigerant injection port 16 communicated with an inner cavity of the cooling diverter ring 4 is formed in the cooling transition sleeve 15. Cooling flow distribution ring 4 sets up in the material base removes runner 3, and cooling flow distribution ring 4 encircles along circumference inside mould 2 a week, cooling flow distribution ring 4 both ends have the pyramis that is used for the reposition of redundant personnel respectively around, cooling flow distribution ring 4 the outer wall with form outer subchannel between the inner wall of outside mould 1, cooling flow distribution ring 4 the inner wall with form interior subchannel between the outer wall of inside mould 2. Thus, the material blank entering the material blank moving flow channel 3 can be divided into two halves, one half of the material blank passes through the upper part of the cooling flow distribution ring 4, the other half of the material blank passes through the lower part of the cooling flow distribution ring 4, a refrigerant is introduced into the inner cavity of the cooling flow distribution ring 4, and the temperature inside the material blank is preliminarily cooled, so that the temperature inside the material blank cannot be very high when the material blank reaches the outlet of the die device 20.

Optionally, the external mold 1 includes an external die 8, the internal mold 2 includes a core rod 9, a material blank outlet 10 is formed between an inner wall of the external die 8 and the core rod 9, a mounting hole is formed in the core rod 9, a cooling ring 5 is arranged in the mounting hole, the cooling ring 5 and an outer wall of the core rod 9 are coaxially arranged, a hollow pipe with an inlet end 51 and an outlet end 52 is arranged inside the cooling ring 5 and is wound along a spiral direction, and the inlet end 51 and the outlet end 52 are both extended in a radial inward inclined manner. The temperature of the outer wall of the mandrel is ensured through oil inlet and outlet of the rotary ring, and the temperature of the tube blank is reduced through heat transfer, so that the problem of the melt-down phenomenon is solved.

Cooling setting device 11 includes outer sizing cover 12 and forced air cooling unit, the outside of outer sizing cover 12 is provided with vacuum box 14, the forced air cooling unit is including wind cover 6 and tuber pipe 7 of through connection, the outer wall of wind cover 6 with form the confession between the inner wall of outer sizing cover 12 and follow the annular channel that the body that the material blank mobile flow passageway 3 was extruded passes through, tuber pipe 7 follows the axle center of inside mould 2 passes and stretches out, wind cover 6 is the loudspeaker form that has throat and flaring, the throat with tuber pipe 7 is connected, the flaring orientation the axle center of outer sizing cover.

Optionally, the cooling medium is cooling oil.

In conclusion, the thick-wall pipe production system in the technical scheme realizes double cooling of the inner surface and the outer surface of the pipe, thereby accelerating the cooling speed; meanwhile, the air cooling device plays a good role in controlling the wall thickness of the pipe, so that the wall thickness deviation of the pipe is greatly reduced, and the production speed is increased by more than 50%; but also greatly reduces the requirement on the anti-sagging performance of the raw materials of the pipe.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.