CN219114760U - Air-draft cooling system for inner walls of flow-blocking net cover and plastic pipes - Google Patents

Abstract

The utility model discloses a choke screen and an exhaust cooling system on the inner wall of a plastic pipe, wherein the choke screen comprises a screen body, an air guide cavity is formed in the hollow structure of the screen body, the tail end of the screen body is a closed surface, the head end of the screen body is open, air guide holes are uniformly distributed on the side wall of the screen body, and the air guide holes penetrate through the side wall and are communicated with the air guide cavity. The utility model provides a plastic pipe inner wall convulsions cooling system, includes extrusion die and foretell choked flow screen panel, and extrusion die is inside to be equipped with compression molding passageway, and extrusion die's tip is equipped with the play glue mouth that links up with compression molding passageway, and choked flow screen panel passes through the go-between limit and installs in the play glue mouth. The utility model provides a choke screen and an exhaust cooling system for the inner wall of a plastic pipe, wherein the air flow of cooling circulation is blocked and drained through the choke screen, so that the air flow speed of the inner wall surface of the pipe is accelerated, the sizing material is cooled better, the sizing material is cooled and molded rapidly, and the cooling effect of the pipe after output molding is improved.

Description

Air-draft cooling system for inner walls of flow-blocking net cover and plastic pipes

Technical Field

The utility model relates to the field of pipe molding machinery, in particular to a choke net cover and an exhaust cooling system for the inner wall of a plastic pipe.

Background

When PE (polyethylene) pipe is extruded from a pipe extrusion molding die, the temperature at the outlet of the sizing material is highest, and the fluidity is good, so that sagging is easily generated due to the action of gravity, the pipe wall thickness of the pipe is uneven, the top is thin, the bottom is thick, the quality of the pipe is affected, and even the pipe is scrapped. Conventional PE (polyethylene) pipe extrusion production is generally carried out by using an exhaust cooling system on the inner wall of the pipe, and the air in the pipe is exhausted from an extrusion die head to form air flow in the pipe to take away heat of the pipe, so that the purpose of cooling the pipe is achieved. The existing in-pipe exhaust cooling system has the defects that the diameter of an air inlet hole is far smaller than the inner diameter of a pipe, the air inlet Kong Fengsu is far larger than the air speed of the inner wall of the pipe, the air flowing speed near the inner wall of the pipe is low, and the cooling effect is poor.

Disclosure of Invention

The utility model aims to provide a choke net cover and an exhaust cooling system for the inner wall of a plastic pipe, wherein the air flow of cooling circulation is blocked and drained through the choke net cover, so that the air flow speed of the inner wall surface of the pipe is accelerated, the sizing material is cooled better, the sizing material is cooled and molded rapidly, and the cooling effect of the pipe after output molding is improved.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows: the utility model provides a choked flow screen panel, includes the cover body, and its inside of cover body hollow structure forms the wind-guiding chamber, and the cover body tail end is the enclosure surface, the head end is uncovered form, and the lateral wall equipartition of the cover body has the wind-guiding hole, and the wind-guiding hole runs through lateral wall intercommunication wind-guiding chamber.

By adopting the technical scheme, the sealing surface of the cover body blocks the passing air flow, so that the air flow is dispersed around the cover body and enters the cover body through the air guide hole. Through the blocking of sealing surface for the flow path of convulsions air current changes, has increaseed the radial area of air current, when carrying out circulation flow cooling to the inside of pipe material, through the blocking and the drainage of the cover body, makes the cooling air current paste the inner wall face of pipe material more tightly, effectively promotes the cooling effect of pipe material.

The choke screen cover is characterized in that the air guide holes encircle the side wall of the cover body and are axially overlapped along the cover body. The air guide holes are uniformly distributed on the side wall of the cover body, air flow flowing through the inner wall surface of the pipe uniformly enters the air guide cavity, and cooling air flow can keep stable flow speed so as to better take away heat of the pipe.

The end of the cover body is provided with the conical surface protruding outwards. The air flow obliquely upwards flows along the conical surface, and when the pipe output from the extrusion forming die is cooled, the cooling air flow is blocked and guided by the conical surface and is blown to the inner wall of the pipe, so that the air flow speed and the air quantity of the inner wall surface of the pipe are increased, and the cooling effect is improved.

The front end of the cover body extends to the radial outer side to form a connecting annular edge. Holes are arranged on the connecting ring, and the connecting ring can be fixed through screw connection during installation.

The utility model also provides another technical scheme that: the air draft cooling system for the inner wall of the plastic pipe comprises an extrusion molding die and the flow blocking net cover according to any one of the technical schemes, wherein a compression molding channel is arranged in the extrusion molding die, a glue outlet connected with the compression molding channel is formed in the end part of the extrusion molding die, and the flow blocking net cover is installed in the glue outlet through a connecting ring edge.

According to the technical scheme, the molten sizing material passes through the compression forming channel and is output from the sizing outlet, the choke screen is arranged in the sizing outlet, when cooling airflow axially flows through the inside of the pipe in the pipe inner wall ventilation cooling system, the radial area of the cooling airflow is increased through the guidance of the choke screen, the air flow on the inner wall surface of the pipe is driven to flow, the cooling effect on the pipe is improved, the cooling forming of the pipe is accelerated, and the product quality of the pipe is improved.

In the plastic pipe inner wall air draft cooling system, the air inlet hole is arranged at the axle center of the glue outlet of the extrusion forming die, and the choke net cover is coaxially opposite to the air inlet hole. The cooling air flow passes through the surface of the flow-resistant net cover, enters the cover body from the air guide hole and enters the air inlet hole, and the flow-resistant net cover is coaxially opposite to the air inlet hole, so that the cooling effect of the air flow on the inner wall surface of the pipe is uniform.

The plastic pipe inner wall exhaust cooling system is characterized in that a plurality of air flow channels are arranged in the extrusion molding die and are communicated with the air inlet. The cooling air flow input by the air inlet holes is output from a plurality of air flow channels, and the internal structure of the extrusion molding die can be cooled in the flowing process.

The plastic pipe inner wall exhaust cooling system is characterized in that an exhaust opening is formed in the end portion of the extrusion forming die and communicated with the air flow channel. The extraction opening is used for connecting an extraction pump, so that flowing cooling air flow is formed in the pipe output from the glue outlet.

The beneficial effects obtained by the utility model are as follows: and installing a choke fan cover at the position of a glue outlet of the extrusion forming die, so that cooling air flows along the surface of the choke fan cover, and the air flows are closer to the inner wall of the pipe, thereby taking away more heat, improving the cooling speed of the pipe and reducing the sagging phenomenon of the pipe.

The utility model has the following advantages: 1. the problem of sagging of the plastic pipe is effectively solved, and the quality of the pipe can be effectively improved; 2. the production efficiency of the pipe is effectively improved, and the energy consumption is reduced; 3. the qualification rate of the pipe is effectively improved, and the production cost is reduced.

Drawings

FIG. 1 is a schematic view of a choke screen according to an embodiment of the present utility model;

FIG. 2 is a schematic side view of a choke screen according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of an assembly structure of an exhaust cooling system for an inner wall of a plastic pipe according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of an exhaust cooling system for an inner wall of a plastic pipe according to an embodiment of the present utility model;

fig. 5 is a schematic cross-sectional structure of a cooling system without a choke screen according to the prior art.

Reference numerals illustrate: the plastic pipe comprises a cover body 1, an air guide cavity 11, an air guide hole 12, a conical surface 13, a connecting ring edge 14, an extrusion molding die 2, a compression molding channel 21, a glue outlet 22, an air inlet 23, an air flow channel 24, an air extraction opening 25 and a pipe 3.

Detailed Description

The utility model is further described below with reference to the drawings and the detailed description.

Fig. 5 is a schematic cross-sectional structure of a cooling system without a choke screen in the prior art, wherein cooling air directly enters an air inlet 23, and flows through the inside of the pipe 3 output from the glue outlet 22 to take away heat of the pipe 3. As the pipe 3 is continuously output, the path of the air flow flowing inside the pipe 3 becomes longer. The cooling system in the prior art is difficult to drive the air flow velocity of the inner wall surface of the pipe 3, and the cooling effect is limited.

As shown in fig. 1-2, a choke screen comprises a cover body 1, wherein an air guide cavity 11 is formed in a hollow structure of the cover body 1, the tail end of the cover body 1 is a closed surface, the head end of the cover body is open, air guide holes 12 are uniformly distributed in the side wall of the cover body 1, and the air guide holes 12 penetrate through the side wall and are communicated with the air guide cavity 11. The air guide holes 12 are arranged around the side wall of the cover 1 and axially stacked along the cover 1. The tail end of the cover body 1 is provided with a conical surface 13 protruding outwards. The head end of the cover 1 extends radially outwardly with a connecting rim 14.

As shown in fig. 3 and fig. 4, an exhaust cooling system for an inner wall of a plastic pipe comprises an extrusion molding die 2 and a choke screen 1a described in the above specific embodiment, wherein a compression molding channel 21 is arranged in the extrusion molding die 2, a glue outlet 22 connected with the compression molding channel 21 is arranged at the end of the extrusion molding die 2, and the choke screen 1a is installed in the glue outlet 22 through a connecting ring edge 14.

An air inlet hole 23 is arranged at the axis of the glue outlet 22 of the extrusion forming die 2, and the choke screen 1a is opposite to the air inlet hole 23 in the coaxial center. The inside of the extrusion molding die 2 is provided with a plurality of air flow channels 24, and the air flow channels 24 are communicated with the air inlet holes 23. An extraction opening 25 is arranged at the end part of the extrusion molding die 2, and the extraction opening 25 is communicated with the airflow channel 24.

The following is a further explanation of the working principle of attaching the choke screen 1a to the extrusion die 2.

Referring to fig. 3 and 4, the molten rubber enters the extrusion die 2, passes through the compression molding passage 21, and finally is cooled and fixed to form the pipe 3 when being discharged from the rubber outlet 22. The air extraction opening 25 is connected with an exhaust fan, so that air enters from the air inlet 23 and is output from the air extraction opening 25 through the air flow channel 24, and cooling air flow for cooling the pipe 3 is formed. The choke screen 1a is arranged at the glue outlet 22, when cooling air flows through, the cooling air flows into the surface of the cover body 1 along the conical surface 13 under the blocking and guiding actions of the conical surface 13, the cooling air flows closer to the inner wall surface of the pipe 3, the air of the inner wall surface of the pipe 3 is driven to flow, the cooling air flows into the air guide cavity 11 of the cover body 1 from the air guide hole 12 on the side wall of the cover body 1, the cooling air flows into the air inlet 23, flows out from the air extraction opening 25 through the air flow channel 24, and can cool the extrusion forming die 2 in the flowing process of the air flow channel 24, so that molten glue in the compression forming channel 21 of the extrusion forming die 2 is pre-cooled.

Through the effect of choked flow screen panel 1a for the cooling air flow that passes through is more closely the internal face of tubular product 3 of continuous output, increases the flow wind speed of tubular product 3 internal face, takes away the heat of tubular product 3 internal surface, accelerates the inside sizing material cooling rate of tubular product 3, can effectively reduce the phenomenon of melting and drooping, improves the quality of tubular product.

In summary, the present utility model has been described and illustrated in the specification, and has been made into practical samples and tested for multiple uses, and from the effect of the use test, it can be proved that the present utility model can achieve its intended purpose, and the practical value is undoubted. The above embodiments are only for illustrating the present utility model, and are not to be construed as limiting the utility model in any way, and any person having ordinary skill in the art will realize that equivalent embodiments of partial changes and modifications can be made by using the disclosed technology without departing from the scope of the technical features of the present utility model.

Claims (8)

1. The utility model provides a choked flow screen panel, includes the cover body (1), its inside wind-guiding chamber (11) that forms of cover body (1) hollow structure, its characterized in that: the tail end of the cover body (1) is a closed surface, the head end of the cover body is open, air guide holes (12) are uniformly distributed on the side wall of the cover body (1), and the air guide holes (12) penetrate through the side wall and are communicated with the air guide cavity (11).

2. The choke screen of claim 1, wherein: the air guide holes (12) surround the side wall of the cover body (1) and are axially overlapped along the cover body (1).

3. The choke screen of claim 1, wherein: the tail end of the cover body (1) is provided with a conical surface (13) protruding outwards.

4. The choke screen of claim 3, wherein: the head end of the cover body (1) extends to the radial outside and is provided with a connecting annular edge (14).

5. An exhaust cooling system for the inner wall of a plastic pipe is characterized in that: the air-flow blocking net cover (1 a) comprises an extrusion molding die (2) and any one of the air-flow blocking net cover (1 a) in the claims 1-4, wherein a compression molding channel (21) is arranged in the extrusion molding die (2), a glue outlet (22) connected with the compression molding channel (21) is formed in the end part of the extrusion molding die (2), and the air-flow blocking net cover (1 a) is arranged in the glue outlet (22) through a connecting annular edge (14).

6. The plastic tubing inner wall induced draft cooling system of claim 5 wherein: an air inlet (23) is arranged at the axis of the glue outlet (22) of the extrusion forming die (2), and the choke screen (1 a) is opposite to the air inlet (23) in the same axis.

7. The plastic tubing inner wall induced draft cooling system of claim 6 wherein: a plurality of air flow channels (24) are arranged in the extrusion forming die (2), and the air flow channels (24) are communicated with the air inlet holes (23).

8. The plastic tubing inner wall induced draft cooling system of claim 7 wherein: an extraction opening (25) is arranged at the end part of the extrusion forming die (2), and the extraction opening (25) is communicated with the air flow channel (24).

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