Pipe sizing device

Abstract

The utility model discloses a pipe sizing device which comprises a cooling assembly, the cooling assembly comprises a fixed pipe and a sizing pipe, and the fixed pipe is bent and connected end to end to form a ring; the sizing pipe is mounted on one side of an inner ring of the fixed pipe, and an annular runner with a U-shaped cross section is formed between opposite surfaces of the fixed pipe and the sizing pipe; water distribution holes are formed in the fixed pipe and communicated with the annular flow channel, a water supply pipe is arranged on the periphery of the fixed pipe, a water outlet of the water supply pipe is communicated with the inner wall of the fixed pipe, and a water inlet of the water supply pipe is connected with a cooling water supply unit; the sizing pipes of every two adjacent sets of cooling assemblies are coaxially installed so that a water distribution ring can be formed between the opposite faces of the pipes when the pipes penetrate through the two sets of sizing pipes, a plurality of sets of through holes are evenly formed in the inner circumferential sides of the sizing pipes in the circumferential direction, and the two ends of the through holes communicate with the annular flow channels and the water distribution rings correspondingly. And cooling water in the fixed pipe is uniformly sprayed into the water distribution ring from the through holes through the annular flow channel, so that an annular water film is formed on the periphery of the pipe to uniformly cool the pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe production and relates to a pipe sizing device. Background Art

[0002] A Chinese invention patent with the publication number of CN110948815B discloses a sizing device for PVC pipes, which includes an outer fixed pipe. An inner fixed pipe is coaxially and fixedly connected inside the outer fixed pipe. A sizing pipe is coaxially and fixedly embedded in the outer fixed pipe and the inner fixed pipe together. A plurality of cooling components are swingably arranged between the outer fixed pipe and the inner fixed pipe. The cooling component includes two cold water pipe heads. A water outlet pipe penetrates between the outer fixed pipe and the inner fixed pipe. It sprays cooling water to the periphery of the pipe along the circumferential direction of the pipe by using a plurality of cold water pipe heads, so that the cooling water uniformly flows on the periphery of the pipe, forming a cooling water film covering the pipe, and the cooling range is relatively large and uniform.

[0003] However, in the above, due to the interval arrangement of a plurality of cold water pipe heads, during the cooling process, the water flow can only be sprayed from the water outlet end of the cold water pipe head to the surface of the pipe for cooling, and the rest of the surface of the pipe cannot be effectively covered. When the pipe is moving forward, the cooling effect of the positions not covered by the water flow is poor, and the pipe is often not cooled sufficiently, seriously affecting the appearance quality and production efficiency of the pipe, resulting in problems such as slow pipe sizing speed and poor quality. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a pipe sizing device to solve the technical problems mentioned in the prior art.

[0005] The pipe sizing device includes a cooling component. At least two groups of the cooling components are provided, and the two groups of the cooling components are sequentially installed at the discharge end of the extruder die along the advancing direction of the pipe. The cooling component includes:

[0006] A fixed pipe, which is bent and connected end to end to form a ring;

[0007] A sizing pipe, which is installed on one side of the inner circle of the fixed pipe, and an annular flow channel with a cross-section of a "U" - shaped structure is formed between the opposite surfaces of the fixed pipe and the sizing pipe;

[0008] Water distribution holes are arranged on the fixed pipe, and the water distribution holes communicate with the annular flow channel. A water supply pipe is arranged on the outer periphery of the fixed pipe. The water outlet of the water supply pipe is communicated with the inner wall of the fixed pipe, and the water inlet of the water supply pipe is connected with a cooling water supply unit;

[0009] The sizing tubes of two adjacent groups of the cooling components are coaxially installed, so that when the pipe passes through the two sizing tubes, a water distribution ring is formed between their opposite faces. A plurality of groups of through holes are uniformly arranged along the circumferential direction on the inner peripheral side of the sizing tube. Two ends of the plurality of groups of through holes are respectively communicated with the annular flow channel and the water distribution ring. The cooling water in the fixed tube is uniformly sprayed into the water distribution ring from the plurality of groups of through holes through the annular flow channel, so as to form an annular water film on the outer periphery of the pipe to uniformly cool the pipe.

[0010] Optionally, an air guide pipe is arranged on the sizing tube close to the die of the extruder. The air inlet of the air guide pipe is connected with a high-pressure blower, and the air outlet of the air guide pipe is communicated with the annular flow channel;

[0011] The air guide pipe is on the side of the sizing tube close to the die of the extruder;

[0012] The through holes are on the side of the sizing tube away from the air guide pipe.

[0013] Optionally, the cooling water supply unit includes:

[0014] A water storage tank, placed below the fixed tube, for collecting the cooling water flowing out of the sizing tube;

[0015] A first water pump, the water inlet of the first water pump is communicated with the bottom of the inner wall of the water storage tank through a pipeline, and the water outlet of the first water pump is connected with the water inlet of the water supply pipe through a pipeline;

[0016] A float switch, placed on the preset water level line of the water storage tank, for detecting the water level height in the water storage tank;

[0017] A temperature detection sensor, placed below the preset water level line of the water storage tank, for detecting the temperature of the cooling water in the water storage tank;

[0018] A drain pipe, the water inlet of the drain pipe is communicated with the bottom of the inner wall of the water storage tank, the water outlet of the drain pipe is connected to a cooling water pool, and an electric valve is installed at the water inlet of the drain pipe;

[0019] A water replenishing pipe, the water outlet of the water replenishing pipe is communicated with the top of the preset water level line of the water storage tank, the water inlet of the water replenishing pipe is connected to the water outlet of a second water pump, and the water outlet of the second water pump is connected to the cooling water pool through a pipeline;

[0020] A controller, connected to the float switch, the temperature detection sensor, the electric valve, the first water pump and the second water pump.

[0021] Optionally, a plurality of water distribution holes are arranged along the circumferential direction on the fixed tube, and the center lines of the plurality of water distribution holes respectively intersect with the axis of the fixed tube at a point.

[0022] Optionally, the through-hole diameters on each of the sizing pipes are the same.

[0023] Optionally, the aperture diameter of the through-hole is 1 - 2 cm.

[0024] Optionally, the through-hole is an annular through-groove, and the center line of the annular through-groove coincides with the center line of the fixed pipe.

[0025] The beneficial effects that the present utility model can produce include:

[0026] For the pipe sizing device provided by the present utility model, during operation, first, the cooling water supply unit pumps cooling water into the fixed pipe. When the cooling water fills the annular flow channel and cooling water flows out from the through-hole at the uppermost position, the pipe is fed into the sizing pipe from the discharge end of the extruder die. Then, the cooling water in the fixed pipe uniformly sprays from the annular flow channel through several groups of through-holes into the water distribution ring, thereby forming an annular water film on the outer periphery of the pipe to uniformly cool the pipe, ensuring that the water flow completely covers the outer periphery of the pipe during the advancement of the pipe, enabling the pipe to be cooled sufficiently, and improving the appearance quality and production efficiency of the pipe. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of the pipe sizing device of the present utility model;

[0028] Figure 2 In the present utility model Figure 1 schematic diagram of the sizing pipe cooling and shaping the pipe;

[0029] Figure 3 is the flow path of the cooling water flowing through the through-holes of several sizing pipes in the present utility model;

[0030] In the figure: 1, fixed pipe; 2, sizing pipe; 3, annular flow channel; 4, water distribution hole; 5, water supply pipe; 6, water distribution ring; 7, through-hole; 8, air duct; 9, water storage tank; 10, first water pump; 11, float switch; 12, temperature detection sensor; 13, drain pipe; 14, solenoid valve; 15, make-up water pipe; 16, second water pump; 17, cooling water tank; 18, high-pressure blower. Detailed Embodiments

[0031] The present utility model will be described in detail below with reference to the drawings and embodiments, but the present utility model is not limited to these embodiments.

[0032] As Figures 1-3As shown in the figure, the utility model provides a pipe sizing device, which includes a cooling assembly. There are at least two groups of cooling assemblies, and the two groups of cooling assemblies are sequentially installed at the discharging end of the extruder die along the advancing direction of the pipe. The cooling assembly includes a fixed pipe 1 and a sizing pipe 2. Among them, the fixed pipe 1 is bent and connected end to end to form a ring, and the sizing pipe 2 is installed on one side of the inner circle of the fixed pipe 1. An annular flow channel 3 with a cross-section of a "U" - shaped structure is formed between the opposite surfaces of the fixed pipe 1 and the sizing pipe 2; water distribution holes 4 are opened on the fixed pipe 1, and the water distribution holes 4 communicate with the annular flow channel 3. A water supply pipe 5 is installed on the outer circumference of the fixed pipe 1, the water outlet of the water supply pipe 5 communicates with the inner wall of the fixed pipe 1, and the water inlet of the water supply pipe 5 is connected with a cooling water supply unit; the sizing pipes 2 of two adjacent groups of cooling assemblies are coaxially installed, so that when the pipe passes through the two sizing pipes 2, a water distribution ring 6 is formed between their opposite surfaces. A plurality of groups of through - holes 7 are evenly opened along the circumferential direction on the inner peripheral side of the sizing pipe 2, and both ends of the plurality of groups of through - holes 7 communicate with the annular flow channel 3 and the water distribution ring 6 respectively; during operation, first, the cooling water supply unit pumps cooling water into the fixed pipe 1. When the cooling water fills the annular flow channel 3 and the cooling water flows out from the uppermost through - hole 7, the pipe is sent into the sizing pipe 2 from the discharging end of the extruder die. The cooling water in the fixed pipe 1 passes through the annular flow channel 3 and is evenly sprayed from the plurality of groups of through - holes 7 into the water distribution ring 6, so as to form an annular water film on the outer circumference of the pipe to uniformly cool the pipe, ensuring that the water flow completely covers the outer circumference of the pipe during the advancing process of the pipe, enabling the pipe to be cooled sufficiently, and improving the appearance quality and production efficiency of the pipe.

[0033] Further, a duct 8 is provided on the sizing pipe 2 close to the extruder die. The air inlet of the duct 8 is connected with a high - pressure blower 18, and the air outlet of the duct 8 communicates with the annular flow channel 3; the duct 8 is on the side of the sizing pipe 2 close to the extruder die, and the through - holes 7 are on the side of the sizing pipe 2 away from the duct 8; when the pipe advances into the sizing pipe 2, the high - pressure blower 18 is started to send air into the duct 8, so that the cooling water in the annular flow channel 3 can be extruded towards the side of the through - holes 7, increasing the water outlet pressure, providing a thrust along the advancing direction of the pipe for the cooling water flowing in multiple cooling assemblies, accelerating the heat exchange efficiency of the water flow. At the same time, when the gas pushes the water flow to sequentially pass through a plurality of through - holes 7, a turbulent flow effect will be caused to the water flow, realizing the effect of uniform temperature cooling of the water flow on the pipe.

[0034] Furthermore, the cooling water supply unit includes a water storage tank 9, a first water pump 10, a float switch 11, a temperature detection sensor 12, a drain pipe 13, a make-up water pipe 15, a second water pump 16 and a controller (using a single-chip microcomputer). The water storage tank 9 is placed below the fixed pipe 1 and is used to collect the cooling water flowing out of the sizing pipe 2. The inlet of the first water pump 10 is connected to the bottom inner wall of the water storage tank 9 through a pipe, and the outlet of the first water pump 10 is connected to the inlet of the water supply pipe 5 through a pipe. The float switch 11 is placed on the preset water level line of the water storage tank 9 and is used to detect the water level height in the water storage tank 9. The temperature detection sensor 12 is placed below the preset water level line of the water storage tank 9 and is used to detect the temperature of the cooling water in the water storage tank 9. The inlet of the drain pipe 13 is connected to the bottom inner wall of the water storage tank 9, the outlet of the drain pipe 13 is connected to the cooling water tank 17, and an electric valve 14 is installed at the inlet of the drain pipe 13. The outlet of the make-up water pipe 15 is connected to the top of the preset water level line of the water storage tank 9, the inlet of the make-up water pipe 15 is connected to the outlet of the second water pump 16, and the outlet of the second water pump 16 is connected to the cooling water tank 17 through a pipe. The controller is connected to the float switch 11, the temperature detection sensor 12, the electric valve 14, the first water pump 10 and the second water pump 16. Specifically, first, according to the water level height detected by the float switch 11 in the water storage tank 9, if it does not reach the preset water level line, the controller controls the second water pump 16 to pump the cooling water in the cooling water tank 17 into the water storage tank through the make-up water pipe 15 until the water level height in the water storage tank 9 reaches the preset water level line. Then, according to the temperature detected by the temperature detection sensor 12 in the water storage tank, if it exceeds the preset threshold value, the controller controls the electric valve 14 to open, and discharges the cooling water in the water storage tank into the cooling water tank 17 through the drain pipe 13 for cooling (condensing agent can be added to the cooling water tank 17 to cool the heat-exchanged cooling water), and at the same time, continues to make up water into the water storage tank through the second water pump 16. When the temperature of the cooling water in the water storage tank drops below the preset threshold value, the first water pump 10 is started to pump the cooling water in the water storage tank into the water supply pipe 5 to cool and size the pipe.

[0035] In the above, a plurality of water distribution holes 4 are circumferentially formed on the fixed pipe 1, and the center lines of the plurality of water distribution holes 4 respectively intersect with the axis of the fixed pipe 1 at a point, so that the cooling water in the fixed pipe 1 is evenly diffused into the annular flow channel 3, ensuring the pressure balance in the annular flow channel 3 and avoiding the formation of a pressure difference on the outer periphery of the pipe during the flow of the cooling water, which affects the appearance quality of the pipe. Specifically, the aperture sizes of the through holes 7 on each sizing pipe 2 are the same, and the aperture of the through hole 7 is 1 - 2 cm, so as to ensure the uniform pressure in the water distribution ring 6.

[0036] In the above, the through hole 7 is an annular through groove, and the center line of the annular through groove coincides with the center line of the fixed pipe 1, which is convenient for forming an annular water curtain in the water distribution ring 6, further ensuring the cooling effect of the water flow on the pipe material, and making the thrust caused by the gas on the water flow more stable, so as to flow along the wavy flow path on the outer periphery of the pipe material.

[0037] The above are only several embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, makes some changes or modifications using the technical content disclosed above, which are equivalent to equivalent implementation cases and all fall within the scope of the technical solution.

Claims

1. A pipe sizing device, including a cooling assembly, characterized in that: The cooling assembly is provided with at least two groups, and the two groups of cooling assemblies are sequentially installed at the discharge end of the extruder die along the traveling direction of the pipe, and the cooling assembly includes: A fixed tube (1), the fixed tube (1) being bent and connected end to end to form a ring; A sizing tube (2), the sizing tube (2) being installed on one side of the inner circle of the fixed tube (1), and forming an annular flow channel (3) having a "U"-shaped cross-section between the opposite surfaces of the fixed tube (1) and the sizing tube (2); The fixed pipe (1) is provided with a water distribution hole (4), the water distribution hole (4) is connected to the annular flow channel (3), a water supply pipe (5) is provided on the outer periphery of the fixed pipe (1), the water outlet of the water supply pipe (5) is connected to the inner wall of the fixed pipe (1), and the water inlet of the water supply pipe (5) is connected to a cooling water supply unit; The sizing tubes (2) of two adjacent groups of the cooling assembly are coaxially installed so that a water distribution ring (6) is formed between the opposite surfaces of the pipe when the pipe passes through the two groups of the sizing tubes (2). A plurality of groups of through holes (7) are evenly arranged along the circumferential direction on the inner circumference of the sizing tube (2). Both ends of the plurality of groups of through holes (7) are respectively connected to the annular flow channel (3) and the water distribution ring (6). The cooling water in the fixed pipe (1) is evenly sprayed from the plurality of groups of through holes (7) into the water distribution ring (6) through the annular flow channel (3), thereby forming an annular water film on the outer circumference of the pipe to evenly cool the pipe.

2. The pipe sizing device according to claim 1, characterized in that: An air guide pipe (8) is provided on the sizing pipe (2) close to the extruder die, the air inlet of the air guide pipe (8) is connected to a high-pressure fan (18), and the air outlet of the air guide pipe (8) is connected to the annular flow channel (3); The air guide pipe (8) is located on a side of the sizing pipe (2) close to the extruder die; The through hole (7) is located on a side of the sizing tube (2) away from the air guide tube (8).

3. The pipe sizing device according to claim 1, characterized in that: The cooling water supply unit comprises: A water storage tank (9) is disposed below the fixed pipe (1) and is used to collect cooling water flowing out of the sizing pipe (2); a first water pump (10), wherein a water inlet of the first water pump (10) is connected to the bottom of the inner wall of the water storage tank (9) through a pipeline, and a water outlet of the first water pump (10) is connected to the water inlet of the water supply pipe (5) through a pipeline; A float switch (11) is placed on a preset water level line of the water storage tank (9) and is used to detect the water level in the water storage tank (9); A temperature detection sensor (12) is placed below a preset water level of the water storage tank (9) and is used to detect the temperature of cooling water in the water storage tank (9); A drainage pipe (13), wherein a water inlet of the drainage pipe (13) is in communication with the bottom of the inner wall of the water storage tank (9), a water outlet of the drainage pipe (13) is connected to a cooling water pool (17), and an electronic valve (14) is installed at the water inlet of the drainage pipe (13); a water supply pipe (15), the water outlet of the water supply pipe (15) being in communication with the top of a preset water level line of the water storage tank (9), the water inlet of the water supply pipe (15) being connected to the water outlet of a second water pump (16), and the water outlet of the second water pump (16) being connected to the cooling water pool (17) via a pipeline; A controller is connected to the float switch (11), the temperature detection sensor (12), the electronic valve (14), the first water pump (10) and the second water pump (16).

4. The pipe sizing device according to claim 1, characterized in that: A plurality of water distribution holes (4) are arranged in a circumferential direction on the fixed pipe (1), and the center lines of the plurality of water distribution holes (4) intersect with the axis of the fixed pipe (1) at one point respectively.

5. The pipe sizing device according to claim 1, characterized in that: The through holes (7) on each of the calibrating tubes (2) have the same aperture size.

6. The pipe sizing device according to claim 1, characterized in that: The through hole (7) has a diameter of 1-2 cm.

7. The pipe sizing device according to claim 1, characterized in that: The through hole (7) is an annular through groove, and the center line of the annular through groove coincides with the center line of the fixed tube (1).

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