Cooling device for PPR pipe extrusion production line

Abstract

The utility model provides a cooling device for a PPR pipe extrusion production line, and belongs to the technical field of pipe forming. The problem that in the prior art, stability of water flow in a cooling device is poor is solved. The cooling device for the PPR pipe extrusion production line comprises a cooling water tank and a sizing sleeve arranged on the cooling water tank, the sizing sleeve is provided with a plurality of cooling water flow channels, the cooling device further comprises a high-level water tank higher than the cooling water tank, a water segregator and a filter, and the water segregator and the filter are both lower than the cooling water tank. The high-level water tank is connected with the filter and the water segregator through a water inlet pipe and a water outlet pipe respectively; the water segregator is connected with the cooling water runners one by one through a plurality of water distribution pipes. The cooling device has the advantage that the stability of water flow in the cooling device can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe forming and relates to a cooling device used in a PPR pipe extrusion production line. Background Art

[0002] Currently, during the PPR pipe extrusion process, the tube embryo requires cooling and shaping to maintain dimensional uniformity and performance stability. After exiting the die, the tube embryo first comes into contact with the sizing sleeve. The cooling process of the sizing sleeve is divided into three zones. The outermost zone is a water film that evenly wraps the tube embryo around the circumference. As the sizing sleeve cools, a vacuum is applied, firmly attaching the outer surface of the tube embryo to the inner surface of the sizing sleeve. The water film lubricates the tube embryo surface and acts as a seal, maintaining the vacuum level. Further back, the sizing sleeve has small holes evenly distributed around the circumference to further cool the pipe. Further back, several high-flow cooling water lines directly cool the sizing sleeve.

[0003] However, due to the complexities of the cooling water supply lines in the workshop, the constant fluctuations in water pressure significantly affected the appearance and quality of the pipes. In severe cases, the pipe blanks could break, impacting production. Summary of the Invention

[0004] The purpose of this utility model is to solve the above problems in the prior art and propose a cooling device for a PPR pipe extrusion production line. The technical problem to be solved by this utility model is how to improve the stability of the water flow in the cooling device.

[0005] The purpose of this utility model can be achieved through the following technical solutions:

[0006] A cooling device for a PPR pipe extrusion production line includes a cooling water tank and a sizing sleeve arranged on the cooling water tank, wherein the sizing sleeve is provided with a plurality of cooling water flow channels. The cooling device is characterized in that the cooling device also includes a high-level water tank arranged at a height higher than the cooling water tank and a water distributor and a filter arranged at a height lower than the cooling water tank. The high-level water tank is connected to the filter and the water distributor through an inlet pipe and an outlet pipe respectively, and the water distributor is connected to the plurality of cooling water flow channels one by one through a plurality of water distribution pipes.

[0007] The cooling device used in the PPR pipe extrusion production line establishes water head (water head refers to the mechanical energy of liquid per unit weight) through height difference, so that when the external water supply pressure is insufficient or fluctuates greatly, the high-level water tank can ensure the stability of the water pressure, thereby keeping the water flow from the high-level water tank into the sizing sleeve stable, and the filter can remove particulate impurities in the cooling water, improve the water quality, and prevent the blockage of the cooling water flow channel, thereby improving the stability of the water flow in the cooling device, providing a more stable and clean cooling water flow for pipe production, reducing quality problems in the production process, and improving production efficiency.

[0008] In the above-mentioned cooling device for a PPR pipe extrusion production line, the filter includes a shell having a water inlet and a water outlet, a cylindrical filter screen is provided between the water inlet and the water outlet of the shell, and the shell is further provided with an ultrasonic vibrator located in the filter screen. Before the external water supply enters the high-level water tank, it first enters the filter for filtration. The filter screen on the filter can effectively block and remove suspended matter and impurities in the external water supply flow, improve water quality, prevent blockage, and ensure the normal operation and cooling efficiency of the cooling device. At the same time, because the filter holes of the filter screen are relatively fine, impurities in the water flow are easy to adhere to. By providing an ultrasonic vibrator in the filter screen and making the ultrasonic vibrator vibrate at the same frequency as the water flow, the particles adhering to the filter screen can be reduced, and the scale adhering to the filter screen can also be eliminated, thereby ensuring the filtering effect of the filter, providing more stable and clean cooling water for pipe production, reducing quality problems in the production process, and improving production efficiency. In addition, by providing an ultrasonic vibrator, frequent disassembly and cleaning of the filter screen can be avoided, reducing costs and making cleaning more convenient.

[0009] In the aforementioned cooling device for a PPR pipe extrusion line, the housing is also equipped with a drain port and a mesh brush that fits over the outside of the filter. The drain port is equipped with a solenoid valve for controlling its opening and closing. The mesh brush helps remove scale adhering to the filter, ensuring the filter's filtration efficiency and providing more stable, clean cooling water for pipe production. A timed solenoid valve allows for the scheduled discharge of wastewater from the filter and simultaneous flushing of the filter. The valve can also be opened manually for both wastewater discharge and flushing.

[0010] In the aforementioned cooling device for a PPR pipe extrusion line, the sizing sleeve comprises a manifold water jacket and a flange water jacket connected to the manifold water jacket. The flange water jacket is provided with a plurality of parallel tie rods, and a plurality of sizing plates spaced along its length are disposed between the tie rods. The sizing plates have through-holes in their centers. A sizing copper sleeve is disposed within the manifold water jacket, and the central axes of the sizing copper sleeve and the through-holes are collinear. During use, the tube blank is first sized within the sizing copper sleeve of the manifold water jacket, and then sequentially passes through the plurality of sizing plates, resulting in multiple shaping processes and effective sizing. Simultaneously, cooling water is evenly sprayed onto the surface of the tube blank through the plurality of cooling water channels in the sizing sleeve, accelerating its cooling process and helping the tube blank maintain the correct size and shape during cooling, ensuring good dimensional stability and surface quality of the final product.

[0011] In the aforementioned cooling device for a PPR pipe extrusion line, the spacing between adjacent sizing plates gradually decreases as it approaches the flange water jacket. The copper sizing sleeve is equipped with a plurality of water spray holes. This gradually decreasing spacing between adjacent sizing plates as it approaches the flange water jacket allows for better initial shaping of the tube blank. Furthermore, the provision of the plurality of water spray holes ensures that cooling water is more evenly applied to the tube blank's surface, further accelerating the cooling process and helping the tube blank maintain its correct size and shape during cooling, ensuring good dimensional stability and surface quality in the final product.

[0012] Compared with the existing technology, the advantages of the cooling device for PPR pipe extrusion production line are: the cooling device for PPR pipe extrusion production line improves the stability of water flow in the cooling device through a high-level water tank and a filter with an ultrasonic vibrator and a filter mesh, and can provide a more stable and clean cooling water flow for pipe production, reduce quality problems in the production process, and improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the cooling device used in the PPR pipe extrusion production line.

[0014] Figure 2 This is a partial cross-sectional view of a cooling device used in a PPR pipe extrusion production line.

[0015] Figure 3 It is a three-dimensional structural diagram of a sizing sleeve of a cooling device used in a PPR pipe extrusion production line.

[0016] In the figure, 1. Cooling water tank; 2. Sizing sleeve; 2a. Diverter plate water jacket; 2b. Flange water jacket; 2c. Pull rod; 2d. Sizing plate; 2d1. Through hole; 2e. Sizing copper sleeve; 2e1. Water sprinkling hole; 3. Cooling water flow channel; 4. High-level water tank; 5. Water distributor; 6. Filter; 6a. Shell; 6a1. Water inlet; 6a2. Water outlet; 6a3. Sewage outlet; 6b. Filter screen; 6c. Ultrasonic vibrator; 6d. Screen brush; 7. Water inlet pipe; 8. Water outlet pipe; 9. Water distribution pipe; 10. Tube blank. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] A cooling device for PPR pipe extrusion production line, referring to Figure 1-3, including a cooling water tank 1 and a sizing sleeve 2 arranged on the cooling water tank 1, and a plurality of cooling water channels 3 are arranged on the sizing sleeve 2. The cooling device also includes a high-level water tank 4 arranged at a height higher than the cooling water tank 1, and a water distributor 5 and a filter 6 arranged at a height lower than the cooling water tank 1. The high-level water tank 4 is connected to the filter 6 and the water distributor 5 through an inlet pipe 7 and an outlet pipe 8, respectively. The water distributor 5 is connected to the plurality of cooling water channels 3 one by one through a plurality of water distributor pipes 9. In this embodiment, the high-level water tank 4 is preferably set at a height of 3-6m, and a water head (water head refers to the mechanical energy of a unit weight of liquid) is established by the height difference. When the external water supply pressure is insufficient or fluctuates greatly, the high-level water tank 4 can ensure the stability of the water pressure, so that the water flow from the high-level water tank 4 into the sizing sleeve 2 is stable.

[0019] Specifically, refer to Figure 1-3 The filter 6 includes a shell 6a having a water inlet 6a1 and a water outlet 6a2, a cylindrical filter screen 6b is provided between the water inlet 6a1 and the water outlet 6a2 of the shell 6a, and an ultrasonic vibrator 6c is also provided on the shell 6a and located in the filter screen 6b. Before the external water supply enters the high-level water tank 4, it first enters the filter 6 for filtration. The filter mesh 6b on the filter 6 can effectively block and remove suspended matter and impurities in the external water supply flow, improve water quality, prevent blockage, and ensure the normal operation and cooling efficiency of the cooling device. At the same time, because the filter holes of the filter mesh 6b are relatively fine, impurities in the water flow are easily attached. By arranging an ultrasonic vibrator 6c in the filter mesh 6b and making the ultrasonic vibrator 6c vibrate at the same frequency as the water flow, the particles adhering to the filter mesh 6b are reduced, and the scale adhering to the filter mesh can also be eliminated, thereby ensuring the filtering effect of the filter 6, providing more stable and clean cooling water for pipe production, reducing quality problems in the production process, and improving production efficiency. In addition, by arranging the ultrasonic vibrator 6c, frequent disassembly and cleaning of the filter mesh 6b can be avoided, reducing costs and making cleaning more convenient.

[0020] More specifically, refer to Figure 1-3The sizing sleeve 2 includes a diverter disc water jacket 2a and a flange water jacket 2b connected to the diverter disc water jacket 2a. The flange water jacket 2b is provided with a plurality of parallel pull rods 2c, and a plurality of sizing plates 2d are arranged between the pull rods 2c and spaced apart along the length direction thereof. A through hole 2d1 is opened in the middle of the sizing plate 2d. A sizing copper sleeve 2e is provided in the diverter disc water jacket 2a, and the central axes of the sizing copper sleeve 2e and the through hole 2d1 are collinear; the spacing between two adjacent sizing plates 2d gradually decreases in the direction approaching the flange water jacket 2b, and a plurality of water sprinkling holes 2e1 are provided on the sizing copper sleeve 2e. During use, the tube blank 10 is first sized in the sizing copper sleeve 2e of the water jacket 2a of the manifold plate, and then passes through a plurality of sizing sheets 2d in sequence, undergoing multiple forming processes to achieve a good sizing effect. At the same time, cooling water can be evenly sprayed onto the surface of the tube blank 10 through a plurality of cooling water flow channels 3 and a plurality of water spray holes 2e1 on the sizing sleeve 2, accelerating its cooling process and helping the tube blank 10 maintain the correct size and shape during the cooling process, thereby ensuring that the final product has good dimensional stability and surface quality.

[0021] In this embodiment, the housing 6a is preferably further provided with a sewage outlet 6a3 and a mesh brush 6d sleeved on the outside of the filter 6b. The sewage outlet 6a3 is provided with a solenoid valve (the solenoid valve is not shown in the figure) for controlling opening and closing. By providing a solenoid valve that can be opened at a time, the waste water in the filter 6 can be discharged at a time and the filter 6b can be flushed at the same time. The valve can also be opened manually to discharge the waste water and flush.

[0022] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A cooling device for a PPR pipe extrusion production line, comprising a cooling water tank (1) and a sizing sleeve (2) arranged on the cooling water tank (1), wherein the sizing sleeve (2) is provided with a plurality of cooling water channels (3), characterized in that: The cooling device further comprises a high-level water tank (4) arranged at a height higher than the cooling water tank (1), and a water distributor (5) and a filter (6) arranged at a height lower than the cooling water tank (1). The high-level water tank (4) is connected to the filter (6) and the water distributor (5) via a water inlet pipe (7) and a water outlet pipe (8), respectively. The water distributor (5) is connected to a plurality of cooling water flow channels (3) one by one via a plurality of water distributor pipes (9).

2. A cooling device for a PPR pipe extrusion production line according to claim 1, characterized in that: The filter (6) comprises a housing (6a) having a water inlet (6a1) and a water outlet (6a2); a cylindrical filter screen (6b) is provided between the water inlet (6a1) and the water outlet (6a2) of the housing (6a); and an ultrasonic vibrator (6c) is also provided on the housing (6a) and is located within the filter screen (6b).

3. A cooling device for a PPR pipe extrusion production line according to claim 2, characterized in that: The housing (6a) is also provided with a sewage outlet (6a3) and a screen brush (6d) sleeved on the outside of the filter screen (6b); the sewage outlet (6a3) is provided with a solenoid valve for controlling opening and closing.

4. A cooling device for a PPR pipe extrusion production line according to claim 1, 2 or 3, characterized in that: The sizing sleeve (2) comprises a diverter disc water jacket (2a) and a flange water jacket (2b) connected to the diverter disc water jacket (2a); a plurality of mutually parallel pull rods (2c) are provided on the flange water jacket (2b); a plurality of sizing plates (2d) spaced apart along the length direction of the pull rods (2c) are provided between the pull rods (2c); a through hole (2d1) is provided in the middle of the sizing plate (2d); a sizing copper sleeve (2e) is provided in the diverter disc water jacket (2a); and the central axes of the sizing copper sleeve (2e) and the through hole (2d1) are collinear.

5. A cooling device for a PPR pipe extrusion production line according to claim 4, characterized in that: The distance between two adjacent sizing plates (2d) gradually decreases in a direction approaching the flange water jacket (2b), and a plurality of water spray holes (2e1) are provided on the sizing copper sleeve (2e).

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