CN211640884U

CN211640884U - Cooling water circulation device of extrusion molding pipeline

Info

Publication number: CN211640884U
Application number: CN201922181931.7U
Authority: CN
Inventors: 王梦澜; 王国平
Original assignee: Fispute Hangzhou Pipeline Technology Co ltd
Current assignee: Fispute Hangzhou Pipeline Technology Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-10-09
Anticipated expiration: 2029-12-06

Abstract

The utility model discloses a cooling water circulation device of an extrusion molding pipeline, which comprises a water storage tank and a cooling tower, wherein a water inlet pipe is arranged on the side wall of the water storage tank in a penetrating way, the water outlet end of the cooling tower is sleeved with a water pipe IV, the water pipe IV is connected with the water inlet pipe in a threaded way, a bearing plate is arranged in the water storage tank, a water inlet pipe passes through the bearing plate and is fixedly connected with the bearing plate, a cover plate is arranged on one side of the bearing plate, a fixing screw is arranged on one side of the cover plate, the fixing screw passes through the cover plate and is connected with the bearing plate in a threaded way, a filter pipe is arranged on one side of the cover plate, the filter pipe passes through the cover plate and is connected with the cover plate in a threaded way, a cooling tank is arranged on one side of the water storage tank, a first water pipe is fixedly arranged on the outer side wall of the cooling tank, the, the cooling liquid is cleaner, the filter tube can be replaced seamlessly by rotating the cover plate, and the working efficiency is improved.

Description

Cooling water circulation device of extrusion molding pipeline

Technical Field

The utility model relates to a pipeline cooling arrangement technical field, in particular to cooling water circulating device of extrusion molding pipeline.

Background

The cooling water circulation system refers to a water supply system for cooling water heat exchange, temperature reduction and recycling, and comprises an open type and a closed type

Traditional extrusion molding pipeline's cooling water circle device is in the use, and the dust in the air can fall into the cooling water, if not timely filter, has impurity production in aqueous, and impurity can reduce the cooling effect of cooling water, and the high unshaped yet of the pipe temperature that the extruding machine just extruded, on adsorbing the plastic conduit with the impurity in the cooling water easily, influence pipeline quality and article looks, to above problem, below provide a solution.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cooling water circle device of extrusion molding pipeline can filter the cooling water clean, guarantees that the cooling water is in more pure state, and can carry out quick replacement and washing to the filter screen, guarantees the reuse's of filter screen advantage.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a cooling water circulation device of an extrusion molding pipeline comprises a water storage tank and a cooling tower, wherein the cooling tower is positioned on one side of the water storage tank, a water inlet pipe is arranged on the side wall of the water storage tank in a penetrating manner, the water inlet pipe is fixedly connected with the water storage tank, a water pressure sensor is arranged on the water inlet pipe, the water pressure sensor is in threaded fit with the water inlet pipe, a water outlet end sleeve of the cooling tower is provided with a water pipe III, the water pipe III is in threaded connection with the water inlet pipe, a water pump III is arranged on the water pipe III, a bearing plate is arranged in the water storage tank, the water inlet pipe penetrates through the bearing plate and is fixedly connected with the bearing plate, a cover plate is arranged on one side of the bearing plate, a rotating shaft is fixedly arranged on one side of the cover plate and is rotatably connected with the bearing plate, four filter pipes, the utility model discloses a cooling water tank, including tank, motor, water pipe two, lateral wall, water pipe two, the one end of cooling tank links to each other with the end of intaking of cooling tower, the tank upside has set firmly the motor, be equipped with the gear on the output shaft of motor, gear and rack toothing, one side of tank is equipped with the cooling tank, be provided with water pipe one between cooling tank and the tank, the lateral wall of cooling tank and tank is passed respectively at the both ends of water pipe one, just the both ends of water pipe one all with cooling tank and tank fixed connection, be provided with water pump one on the water pipe one, be provided with water pipe two between cooling tank and the cooling tower, the lateral wall that the cooling tank was passed to the one end of water pipe two gets into inside the cooling tank, water pipe two is kept away from the one end of cooling tank links to each other with the end.

By adopting the technical scheme, cooling water flows out of the cooling tower and enters the filter pipe through the water pump III, the filter pipe can filter the cooling water to enable the cooling water to be in a relatively pure state, the filtered cooling water is gathered in the water storage tank, the water pipe can guide the cooling water in the water storage tank to the cooling tank for a while, at the moment, when a pipeline extruded by the plastic extruding machine passes through the cooling tank, the cooling water in the cooling tank can cool and cool the plastic pipeline, the cooled cooling water flows to the other end along the cooling tank, the water pump pumps out the cooling water in the cooling tank through the water pipe II, the cooling water entering the water pipe II is cooled through the cooling tower, the cooling water cooled by the cooling tower is pumped into the water pipe III by the water pump III, then the cooled water enters the water storage tank under the guiding action of the water inlet pipe and the water pipe III, the cooling water at a lower temperature in the water storage tank enters the cooling tank again through the water pipe I, thereby make the coolant liquid in the cooling tank keep at lower temperature, when the filter tube blocks up, the water pressure increase in the inlet tube, water pressure sensor detects can send an electric signal for the controller after the water pressure increase, controller control motor rotates, the motor rotates the back, drive gear revolve, the gear can drive the rack, the rack atress drives the apron and rotates, the apron rotates and makes current filter tube stagger with the inlet tube, the inlet tube is kept away from to current filter tube, new filter tube removes inlet tube the place ahead and the cooperation of inlet tube, the user can take off the filter tube that blocks up, wash, make things convenient for next use.

Preferably, the filter tube comprises a tube body, filter holes are formed in the tube wall of the tube body, cover plates matched with the filter holes are arranged in the filter holes, filter plate frames are fixedly arranged on the cover plates, a plurality of filter plates are arranged on the filter plate frames, and the cover plates are in inserting fit with the filter holes in the filter tube.

By adopting the technical scheme, the design of the multilayer filter plate enables the filter pipe to filter the cooling liquid more thoroughly, the detachable design enables the filter plate to be more convenient to replace and clean, repeated use of the filter plate is realized, and the cost is reduced.

Preferably, the end surface of the bearing plate close to the cover plate is provided with a sliding groove, the end surface of the cover plate close to the bearing plate is fixed with a sealing ring matched with the sliding groove, and the sealing ring is in sliding fit with the sliding groove.

Adopt above-mentioned technical scheme, when the apron rotates, the sealing washer rotates in the spout, and the spout can play limiting displacement to the rotation of slide bar, makes the apron more steady at the rotation in-process, reduces to rock, and the cooperation of spout and slide bar can increase the apron and accept the leakproofness between the board, reduces spilling of cooling water.

Preferably, the bearing plate is provided with a sliding hole, a positioning rod is arranged in the sliding hole, one end, away from the sliding hole, of the positioning rod is hemispherical, a spring is fixedly arranged at one end, entering the sliding hole, of the positioning rod, the other end of the spring is fixedly connected with the bottom of the sliding hole, a photoelectric sensor is arranged at the bottom of the sliding hole, the photoelectric sensor is in threaded fit with the bearing plate, the photoelectric sensor is located in the middle of the spring and electrically connected with the controller, and a plurality of positioning holes are formed in one side of the cover plate and are connected with the positioning rod in an inserting mode.

Adopt above-mentioned technical scheme, when the motor starts, the motor drives the apron and rotates, the apron can produce an extrusion force to the locating lever, the extrusion force passes through the locating lever and passes to the spring, the spring atress is compressed, the locating lever is withdrawed in the sliding hole, the apron continues to rotate, when next locating hole on the apron coincides with the locating lever, the locating lever pops out under the effect of spring, when photoelectric sensor was kept away from to the locating lever, can produce an electric signal, photoelectric sensor sends the electric signal for the controller, controller control motor stall, make the locating lever stop in the locating hole, the locating lever makes with the cooperation of locating hole and accepts the board and can laminate better with the apron, guarantee that the cooling water can be smooth filter through the filter tube.

Preferably, a liquid limiting pipe penetrates through the side wall of the water storage tank.

Adopt above-mentioned technical scheme, limit the how much of coolant liquid in the cistern of liquid pipe restriction, when the coolant liquid was higher than the limit liquid pipe, the coolant liquid can flow out from the limit liquid pipe, makes the coolant liquid in the cistern keep at certain height.

Preferably, a drain pipe is arranged at the bottom of the side wall of the water storage pool in a penetrating manner, and a valve is arranged on the drain pipe.

Adopt above-mentioned technical scheme, when needs wash the cooling bath or change the coolant liquid, can open the valve of fluid-discharge tube, the coolant liquid can flow out from the fluid-discharge tube to discharge the coolant liquid in the tank.

Preferably, a plurality of guide columns are arranged in the cooling pool and are in rotating connection with the cooling pool.

By adopting the technical scheme, the plastic pipeline just extruded from the plastic extruding machine has high temperature, is not fixed and formed, can be stressed and broken in the cooling process, and the guide column plays a supporting role in the plastic pipeline.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is a side view of the embodiment;

FIG. 3 is a sectional view of the embodiment;

fig. 4 is a partial enlarged view of a.

Reference numerals: 1. a water storage tank; 2. a cooling tower; 3. a water inlet pipe; 4. a water pressure sensor; 5. a water pipe III; 6. a third water pump; 7. a bearing plate; 8. a cover plate; 9. a rotating shaft; 10. a filter tube; 11. a rack; 12. a motor; 13. a gear; 14. a cooling pool; 15. a first water pipe; 16. a first water pump; 17. a water pipe II; 18. a second water pump; 19. a controller; 20. a pipe body; 21. a filter disc; 22. a cover sheet; 23. a filter frame; 24. a chute; 25. a seal ring; 26. a slide hole; 27. a spring; 28. a photosensor; 29. positioning a rod; 30. positioning holes; 31. a liquid limiting pipe; 32. a liquid discharge pipe; 34. A guide post; 35. and (5) filtering holes.

Detailed Description

The following is only the preferred embodiment of the present invention, the protection scope is not limited to this embodiment, and all technical solutions belonging to the idea of the present invention should belong to the protection scope of the present invention. It should also be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and such modifications and decorations should also be regarded as the protection scope of the present invention.

As shown in fig. 1 to fig. 1, a cooling water circulation apparatus for an extruded duct includes a water storage tank 1 and a cooling tower 2, the water storage tank 1 being located at one side of the cooling tower 2. The cooling tower 2 is used for cooling the cooling water, so that the cooling water is at a lower temperature, the working efficiency of the cooling water in cooling a pipeline is improved, and the water storage tank 1 is used for storing the cooled cooling water, so that the next use is facilitated.

The inlet tube 3 is worn to be equipped with by 1 lateral wall of tank, and

inlet tube

3 and 1 fixed connection of tank are equipped with pressure sensor 4 on the lateral wall of inlet tube 3, pressure sensor 4 and 3 screw-thread fit of inlet tube. The water pressure sensor 4 serves to monitor the water pressure in the inlet pipe 3. The water outlet end of the cooling tower 2 is sleeved with a water pipe III 5, one end of the water pipe III 5 is in threaded connection with the water inlet pipe 3, and a water pump III 6 is arranged on the water pipe III 5.

The water storage tank 1 is internally provided with a bearing plate 7, and the water inlet pipe 3 passes through the bearing plate 7 and is fixedly connected with the bearing plate 7. The adapter plate 7 serves as a transitional adapter for connecting the water pipe to the filter device. A cover plate 8 is arranged on one side of the bearing plate 7, a rotating shaft 9 is fixedly arranged on one side of the cover plate 8, and the rotating shaft 9 is rotatably connected with the bearing plate 7.

Four filter pipes 10 are arranged on one side of the cover plate 8, and the filter pipes 10 penetrate through the cover plate 8 and are in threaded connection with the cover plate 8. The filter pipes 10 filter the cooling liquid entering the water storage tank 1 in the cooling tower 2, so that the cooling liquid is in a relatively pure state, and the design of the four filter pipes 10 can realize seamless replacement when the filter pipes 10 need to be replaced. The filtering pipe 10 comprises a pipe body 20, and filtering holes 35 are formed on the pipe wall of the pipe body 20. The filter holes 35 allow the filter 21 to be removed therefrom, facilitating cleaning and replacement of the filter 21. The filtering pipe 10 is internally provided with a cover plate 22 which is matched with the filtering hole 35. The cover plate 22 is designed to make the filter tube 10 more airtight and not leak water. The cover plate 22 is fixedly provided with a filter disc frame 23, the filter disc frame 23 is provided with a plurality of filter discs 21 in an inserted manner, and the cover plate 22 is in penetrating fit with the filter holes 35 on the filter pipe 10. The design of the multi-layer filter sheet 21 makes the filter tube 10 filter the cooling water more thoroughly.

One side of the water storage tank 1 is provided with a cooling tank 14, a first water pipe 15 is arranged between the cooling tank 14 and the water storage tank 1, two ends of the first water pipe 15 penetrate through the side walls of the cooling tank 14 and the water storage tank 1 respectively, two ends of the first water pipe 15 are fixedly connected with the cooling tank 14 and the water storage tank 1, and a first water pump 16 is arranged on the first water pipe 15. The first water pump 16 introduces the cooling water in the water storage tank 1 into the cooling tank 14 through the first water pipe 15, so that the cooling liquid cools the plastic pipeline in the cooling tank 14. A plurality of guide posts 34 are provided in the cooling bath 14. When the plastic pipe is extruded from the extruder, the plastic pipe is high in temperature and is not cooled to be formed, the plastic pipe is easy to bend and damage in the forward movement process, and the guide column 34 plays a role in supporting and guiding the plastic pipe.

A second water pipe 17 is arranged between the cooling pool 14 and the cooling tower 2, one end of the second water pipe 17 penetrates through the side wall of the cooling pool 14 to enter the inside of the cooling pool 14, one end, far away from the cooling pool 14, of the second water pipe 17 is connected with the water inlet end of the cooling tower 2, and a second water pump 18 is arranged on the second water pipe 17. The second water pump 18 pumps out the cooling water which is cooled through the pipe plastic pipeline in the cooling pool 14 through the second water pipe 17, so that the cooling water in the cooling pool 14 is always kept at a lower temperature, the cooling effect of the cooling water on the plastic pipeline is ensured, the water pump pumps the cooling water into the cooling tower 2 through the third water pipe 5, and the cooling liquid is cooled through the cooling tower 2

The water pump III 6 starts, the water pump III 6 pumps the cooling water in the cooling tower 2 to the water pipe III 5, the cooling water in the water pipe III 5 flows into the water inlet pipe 3 again, the cooling water enters the filter pipe 10 through the guide action of the water inlet pipe 3, the filter sheet 21 in the filter pipe 10 filters the cooling water, the cooling water can flow into the water storage tank 1 through the filter sheet 21, and dust impurities are separated by the filter screen, so that the cooling water is kept in a relatively pure state. The first water pump 16 is started, the first water pump 16 guides the cooling liquid in the water storage tank 1 to the cooling tank 14 through the first water pipe 15, when the cooling water is in a certain volume in the cooling tank 14, the plastic pipeline is extruded by the extruding machine, the plastic pipeline enters the cooling tank 14, the guide column 34 supports the plastic pipeline to prevent the pipeline from deforming, the cooling water flowing out of the first water pipe 15 in the advancing process can cool the plastic pipeline, and due to heat exchange, the temperature of the pipeline is reduced, so that forming is realized, and the temperature of the cooling water rises. The second water pump 18 is started, the cooling water which is heated in the cooling pool 14 is pumped to the cooling tower 2 through the second water pipe 17 to cool the cooling water, and the cooling water which is cooled through the third water pump 6 is pumped to the water storage pool 1, so that the circulation is realized, the cooling water in the cooling pool 14 is always kept in a lower temperature and a purer state, and the cooling effect and the cooling efficiency are guaranteed.

The end surface of the bearing plate 7 close to the cover plate 8 is provided with a sliding groove 24, the end surface of the cover plate 8 close to the bearing plate 7 is fixed with a sealing ring 25 matched with the sliding groove 24, and the sealing ring 25 is in sliding fit with the sliding groove 24. The chute 24 limits the movement of the sealing ring 25, so that the cover plate 8 cannot shake in the rotating process, the stability is improved, the sealing performance of the whole device is ensured, and the cooling liquid cannot spill.

The bearing plate 7 is provided with a sliding hole 26, a positioning rod 29 is arranged in the sliding hole 26, and one end of the positioning rod 29 far away from the sliding hole 26 is hemispherical. The locating rod 29 with the hemispherical top end enables the locating rod 29 to better move in the sliding hole 26 when being subjected to a pressing force. A spring 27 is fixedly arranged at one end of the positioning rod 29 entering the sliding hole 26, and the other end of the spring 27 is fixedly connected with the bottom of the sliding hole 26. The spring 27 can automatically restore the original position after the positioning rod 29 is pressed by force. The bottom of the sliding hole 26 is provided with a photoelectric sensor 28, the photoelectric sensor 28 is in threaded connection with the bearing plate 7, the photoelectric sensor 28 is positioned in the center of the spring 27, and the photoelectric sensor 28 is electrically connected with the controller 19. The photoelectric sensor 28 is used to detect the position of the positioning rod 29. One side of the cover plate 8 is provided with a plurality of positioning holes 30, and the positioning holes 30 are inserted with the positioning rods 29. The matching of the positioning rod 29 and the positioning hole 30 fixes the position of the cover plate 8 and the bearing plate 7.

The outer edge of the cover plate 8 is fixedly provided with a rack 11. The cover plate 8 can be driven to rotate by rotating the rack 11, the motor 12 is fixedly arranged on the upper side of the water storage tank 1, the gear 13 is arranged on the output shaft of the motor 12, and the gear 13 is meshed with the rack 11. The gear 13 can be driven to rotate by the rotation of the motor 12 fixed on the side wall, and the gear 13 drives the rack 11 to rotate, so that the automatic replacement of the filter pipe 10 is realized.

The controller 19 is arranged outside the water storage tank 1, and the controller 19 is electrically connected with the water pressure sensor 4 and the motor 12. When filter tube 10 blockked up, filter tube 10 goes out the water speed and slows down, the water pressure increase in the inlet tube 3, water pressure sensor 4 detects, send signal gives controller 19, controller 19 control motor 12 starts, can drive gear 13 when motor 12 starts and rotate, gear 13 drives rack 11 and rotates, thereby make apron 8 rotate round fixed axis of rotation 9, spout 24 plays limiting displacement when apron 8 slides with sealing washer 25, also make apron 8 at the rotation in-process, the cooling water can not flow out from the gap between apron 8 and the accept board 7. When the cover plate 8 rotates, the positioning rod 29 is subjected to an extrusion force, so that the positioning rod 29 is extruded backwards, the spring 27 is compressed, the positioning rod 29 is moved out of the current positioning hole 30, the current filtering pipe 10 is staggered with the water outlet pipe, the current filtering pipe 10 rotates away from the water outlet pipe opening, so that the next new filtering pipe 10 is moved to the water outlet pipe opening, the positioning rod 29 is matched with the positioning hole 30, the positioning rod 29 pops out of the sliding hole 26 under the action of the elastic force of the spring 27, so that the positioning rod 29 is far away from the photoelectric sensor 28, the photoelectric sensor 28 generates an electric signal at the moment, the electric signal is sent to the controller 19, the controller 19 receives the electric signal of the photoelectric sensor 28 and then feeds back the electric signal to the motor 12, the motor 12 is controlled to stop rotating, the positioning.

When the filter pipe 10 is replaced, the filter pipe 10 to be replaced is unscrewed, and a new filter pipe 10 is screwed on through threads and fixed on the cover plate 8. The cover plate 22 is opened for the replaced filter pipe 10, the cover plate 22 connected with the filter disc rack 23 is taken out, the filter disc 21 on the filter disc rack 23 is taken out, the filter disc 21 is cleaned, the filter disc 21 is recycled, and the working cost is reduced.

A liquid limiting pipe 31 is arranged on the side wall of the water storage tank 1 in a penetrating way. The liquid limiting pipe 31 is used for limiting the volume of cooling water in the water storage tank 1, and when the cooling water is too much, the cooling water can flow out of the liquid limiting pipe 31, so that the cooling water cannot overflow from the periphery of the water storage tank 1. A liquid discharge pipe 32 is arranged at the bottom of the side wall of the water storage pool 1 in a penetrating way, and a valve is arranged on the liquid discharge pipe 32. When the cooling liquid in the water storage pool 1 needs to be discharged, the valve on the liquid discharge pipe 32 is opened, the liquid discharge pipe 32 can conveniently discharge the cooling liquid in the water storage pool 1, the water storage pool 1 does not need to be turned over, and the workload of an operator is reduced.

Claims

1. The utility model provides a cooling water circulating device of extruded pipeline, includes tank (1) and cooling tower (2), its characterized in that, cooling tower (2) are located one side of tank (1), inlet tube (3) are worn to be equipped with by the lateral wall of tank (1), inlet tube (3) and tank (1) fixed connection, be equipped with water pressure sensor (4) on inlet tube (3), water pressure sensor (4) and inlet tube (3) screw-thread fit, the play water pot head of cooling tower (2) is equipped with water pipe three (5), water pipe three (5) and inlet tube (3) threaded connection, be provided with water pump three (6) on water pipe three (5), be equipped with in tank (1) and accept board (7), inlet tube (3) pass and accept board (7), and with accept board (7) fixed connection, accept board (7) one side and be equipped with apron (8), the improved water storage tank is characterized in that a rotating shaft (9) is fixedly arranged on one side of the cover plate (8), the rotating shaft (9) is rotatably connected with the bearing plate (7), four filter pipes (10) are arranged on one side of the cover plate (8), the filter pipes (10) penetrate through the cover plate (8) and are in threaded connection with the cover plate (8), racks (11) are fixedly arranged on the outer edges of the cover plate (8), a motor (12) is fixedly arranged on the upper side of the water storage tank (1), a gear (13) is arranged on an output shaft of the motor (12), the gear (13) is meshed with the racks (11), a cooling tank (14) is arranged on one side of the water storage tank (1), a first water pipe (15) is arranged between the cooling tank (14) and the water storage tank (1), two ends of the first water pipe (15) penetrate through the side walls of the cooling tank (14) and the water storage tank (1) respectively, and two ends of the first water pipe (15, be provided with two (17) of water pipe between cooling tank (14) and cooling tower (2), the lateral wall that cooling tank (14) were passed to the one end of two (17) of water pipe gets into inside cooling tank (14), keep away from two (17) of water pipe the one end of cooling tank (14) links to each other with the end of intaking of cooling tower (2), be provided with two (18) of water pump on two (17) of water pipe, be provided with controller (19) on tank (1) outer wall, controller (19) and water pressure sensor (4), the equal electric connection of motor (12).

2. The cooling water circulation device of the extrusion molding pipeline, according to claim 1, is characterized in that the filter pipe (10) comprises a pipe body (20), a filter hole (35) is formed in the pipe wall of the pipe body (20), a cover plate (22) matched with the filter hole (35) is arranged in the filter hole (35), a filter frame (23) is fixedly arranged on the cover plate (22), a plurality of filter sheets (21) are arranged on the filter frame (23), and the cover plate (22) is in penetrating fit with the filter hole (35) in the filter pipe (10).

3. The cooling water circulation device of the extrusion molding pipeline is characterized in that a sliding groove (24) is formed in the end face, close to the cover plate (8), of the bearing plate (7), a sealing ring (25) matched with the sliding groove (24) is fixed on the end face, close to the bearing plate (7), of the cover plate (8), and the sealing ring (25) is in sliding fit with the sliding groove (24).

4. The cooling water circulation device for the extrusion molding pipeline is characterized in that a sliding hole (26) is formed in the bearing plate (7), a positioning rod (29) is arranged in the sliding hole (26), a spring (27) is fixedly arranged at one end, entering the sliding hole (26), of the positioning rod (29), the other end of the spring (27) is fixedly connected with the bottom of the sliding hole (26), a photoelectric sensor (28) is arranged at the bottom of the sliding hole (26), the photoelectric sensor (28) is in threaded fit with the bearing plate (7), the photoelectric sensor (28) is located in the middle of the spring (27), the photoelectric sensor (28) is electrically connected with the controller (19), a plurality of positioning holes (30) are formed in one side of the cover plate (8), and the positioning holes (30) are inserted into the positioning rods (29).

5. A cooling water circulation apparatus for an extrusion molding duct according to claim 1, wherein a limiting liquid pipe (31) is formed through a side wall of the water storage tank (1).

6. A cooling water circulation device for extrusion molding pipes as claimed in claim 1, wherein a drain pipe (32) is formed at the bottom of the side wall of the water storage tank (1), and a valve is provided on the drain pipe (32).

7. A cooling water circulation apparatus for an extrusion molding pipe according to claim 1, wherein a plurality of guide pillars (34) are provided in the cooling bath (14), and the guide pillars (34) are rotatably connected to the cooling bath (14).