CN202097964U - Water-cooling vacuum forming roller for producing vacuum heat-sealing drip irrigation tapes - Google Patents

Abstract

The purpose of this utility model is to provide a water-cooled vacuum forming roller for the production of vacuum heat-sealed drip irrigation belt, which is composed of a rotating forming wheel set on a fixed hollow shaft, a fixed water jacket is arranged around the hollow shaft to form a cold water chamber, and the hollow shaft and the rotating forming wheel A vacuum chamber is arranged axially between them. During operation, the ratchet teeth on the end face of the sprocket mesh with the ratchet teeth on the end face of the rotary forming wheel to drive the rotary forming wheel to rotate around the fixed water jacket. The forming roller of the utility model can form 12 to 24 drip irrigation belts at the same time, greatly improving production efficiency and reducing the production cost of drip irrigation belts, making the processing equipment of drip irrigation belts develop towards specialization and supporting standardization, and the quality is easier to control to meet The market demand for water-saving irrigation in my country is growing by leaps and bounds.

Description

A water-cooled vacuum forming roller for producing vacuum heat-sealed drip irrigation belt

technical field

The utility model relates to a water-cooled vacuum forming roller used for producing vacuum heat-sealed drip irrigation belts, and belongs to the technical field of plastic forming equipment. the

Background technique

Drip irrigation is the most water-saving irrigation technology. The drip irrigation belt is one of the main drip irrigation components. Through the labyrinth flow channel on it, the pressure water flow can be changed into small flow water droplets or trickles that slowly drip or flow out. However, at present, due to the high investment in the early stage, the application of this technology is limited in the vast rural areas, especially the poor areas with drought and water shortage. At present, the commonly used method of forming the labyrinth channel of the drip irrigation belt is mainly the vacuum suction method: first, a thin-walled cylinder is continuously extruded by the extruder, and the extruded thin-walled tube is flattened during the upward stretching process in the semi-molten state. Before cooling, the thin-walled plastic tube is pressed into the shape of the labyrinth flow channel by the forming wheel, and the labyrinth flow channel is sucked out by vacuum suction, and then cut into two drip irrigation belts with a labyrinth on one side. This production method and equipment can press up to 2 drip irrigation belts once, and the production efficiency is relatively low. the

The existing vacuum sizing forming wheel is to engrave shallow grooves with an outer arc length of less than 4mm and a depth of about 0.1mm along the circular fan surface on a disc-shaped steel sheet with a thickness of about 1.0mm and a diameter of 380-570mm, as an air extraction channel. At the same time, on the outer diameter circumference corresponding to the shallow groove or staggered from the shallow groove, a gap with a depth of about 1.0mm should be carved, and then at least 3 pieces, up to 5 pieces of disc-shaped steel sheets should be superimposed, and the outer side should be Two steel discs with the same diameter and a thickness of 50-80 mm are used to lock multiple superimposed disc-shaped steel discs together. The disadvantages of the forming wheel of this structure are: First, limited by the structure, the labyrinth formed by multiple disks can only be rectangular, and the hydraulic performance of the rectangular labyrinth is poor, which is the root cause of the easy blockage of the drip irrigation belt. The second is that the water cooling structure design of the forming wheel is unreasonable, the forming wheel cannot be cooled in time, and the processing speed cannot be improved. The third is that on each forming wheel, there are thousands of labyrinth suction passages with a length less than 4mm, a width of 0.1mm, and a depth of ≥50mm. If one is blocked, the forming wheel will be disassembled and repaired as a whole or scrapped. How to improve the forming efficiency of the drip irrigation belt is still a bottleneck problem restricting the output of the drip irrigation belt. the

Contents of the invention

The purpose of the utility model is to provide a water-cooled vacuum forming roller for forming multiple drip irrigation belts at the same time, in order to greatly improve the production efficiency of vacuum heat-sealed drip irrigation belts and solve the blocking problem of the vacuum suction channel of the forming wheel. the

The technical solution of the utility model is achieved in this way: the water-cooled vacuum forming roller used for producing vacuum heat-sealed drip irrigation belt is composed of a rotating forming wheel set on a fixed hollow shaft, and a fixed water jacket is arranged around the hollow shaft to form a cold water chamber. A vacuum chamber is arranged axially between the hollow shaft and the rotary forming wheel. During operation, the end face ratchet of the sprocket meshes with the end face ratchet of the rotary forming wheel to drive the rotary forming wheel to rotate around the fixed water jacket. the

The water-cooled vacuum forming roller for producing vacuum heat-sealed drip irrigation belts, the outer surface of the rotating forming wheel is provided with annular ribs at fixed intervals along the axial direction, annular grooves and evenly distributed air extraction through holes, and the inner surface of the annular groove An annular labyrinth forming ring with a rectangular cross section is inlaid, and after the rotating forming wheel is inlaid with the labyrinth forming ring, the outer diameter of the forming ring is the same as the outer diameter of the annular rib. the

The water-cooled vacuum forming roller for the production of vacuum heat-sealed drip irrigation belts, the outer surface of each forming ring is engraved with N groups of equidistant labyrinth grooves along the circumferential direction, and the shape of the labyrinth grooves is designed according to the hydraulic performance requirements. The labyrinth pumping hole is set at the bottom to communicate with the pumping hole of the rotary forming wheel. When the pumping hole rotates to the position of the vacuum chamber of the water-cooled shaft, a vacuum condition is formed. The rotary molding between the annular rib and the labyrinth forming ring On the outer surface of the wheel, the water passage of the drip irrigation tape is sucked out, and the water outlet labyrinth is sucked out at the labyrinth groove, and at the same time, the annular convex rib and the convex part of the annular labyrinth forming ring are pressed against the drip irrigation tape. the

In the water-cooled vacuum forming roller for producing vacuum heat-sealed drip irrigation belts, the air pumping holes provided on the rotary forming wheel are larger than the labyrinth air pumping holes provided on the labyrinth forming ring. the

In the water-cooled vacuum forming roll for producing vacuum heat-sealed drip irrigation belts, the vacuum chamber is connected to the hollow shaft through an exhaust transition pipe, one end of the hollow shaft is blocked, and the other end is connected to the air extraction port. The valve is connected to a vacuum pump. the

In the water-cooled vacuum forming roller for producing vacuum heat-sealed drip irrigation belts, other parts of the inner surface of the rotating forming wheel are isolated from the vacuum chamber, do not form a vacuum condition, and are in contact with the fixed hollow shaft. the

In the water-cooled vacuum forming roll for producing vacuum heat-sealed drip irrigation belts, the fixed hollow shaft and the end cover form a cold water cavity, and the cooling water inlet and outlet are arranged on the end cover. the

The water-cooled vacuum forming roller for producing the vacuum heat-sealed drip irrigation belt is arranged under the extrusion die of the double-die screw extruder, and is juxtaposed with the synchronously reverse-rotating flexible pressure roller. the

The utility model can be used directly with a large plastic extruder, and can form 12 to 24 drip irrigation tapes at the same time on the same production line, greatly improving production efficiency and reducing the production cost of drip irrigation tapes, and making the processing equipment of drip irrigation tapes towards specialization , Supporting the development of standardization, the quality is easier to control, so as to meet the market demand of my country's water-saving irrigation by leaps and bounds. the

Description of drawings

Figure 1: Schematic diagram of the processing equipment used to produce vacuum heat-sealed drip irrigation belt

Figure 2: is the top view of Figure 1

Figure 3: Schematic diagram of the structure of the water-cooled vacuum forming roller

Figure 4: It is the A-A sectional view of Figure 3

Figure 5: It is the B-B section view of Figure 3

Figure 6: It is a partial enlarged view of C in Figure 3

Figure 7: It is the D-direction view of Figure 3

Figure 8: It is the E-direction view of Figure 3

Figure 9: It is a partial enlarged view of F in Figure 7

Figure 1, Figure 2 processing equipment front view, top view icon description:

1. Extruder screw pulley 2. Extruder upper hopper 3. Extruder barrel 4. Extruder chassis 5. Extruder barrel heater 6. Die right-angle joint 7. Extrusion die A 8. Double-piece extrusion die head 9, extrusion die mouth B10, water-cooled vacuum forming roller 11, cutter shaft 12, drive motor pulley 13, drive belt 14, cylinder 15, flexible pressure roller 16, forming uncut drip irrigation belt 17 , tension roller A 18, tension roller B 19, tension roller C 20, tension roller D21, flattening roller 22, winding shaft 23, vacuum exhaust pipe 24, return pipe 25, water inlet pipe 26, water inlet control valve 27. Exhaust valve 28. Exhaust valve 29. Cooling water tank 30. Vacuum pump

Figure 3 ~ Figure 9 water-cooled vacuum forming roller icon description:

10-1, air suction port 10-2, lock nut A 10-3, water inlet 10-3-1, water inlet 10-3-2, water outlet 10-4, end cover A 10-5, labyrinth forming ring 10-5-3, labyrinth groove 10-5-1, 10-5-2, air extraction through hole 10-6, annular convex rib 10-7, cold water chamber 10-8, excessive air extraction pipe 10-9, Fixed water jacket 10-9-1, water-cooled shaft vacuum chamber 10-10, rotary forming wheel 10-11, hollow shaft 10-12, end cover B 10-13, lock nut B10-14, drive sprocket 10-15 , Bearing 10-16, circlip 10-17, fixed shaft seat

Detailed ways

The processing method and equipment working principle schematic diagram of the production of vacuum heat-sealed drip irrigation belt shown in Fig. 1, 2, one embodiment of the present utility model is to extrude two plastic films simultaneously by a plastic extruder, simultaneously molding on the plastic film The water passages and outlet mazes of multiple groups of drip irrigation belts are cut into multiple drip irrigation belts online. the

The water-cooled vacuum forming roller 10 of the utility model is the key equipment matched with the double-die screw extruder, it is arranged under the extrusion die, and forms a forming station in parallel with the flexible pressure roller 15, and is arranged behind the forming station in turn There are also tension rollers 17, 18, 19, 20, the slitting knife 11 arranged between the tension rollers, the flattening wheel 21 and the winding shaft 22 etc. which are arranged at the cutting station rear form the production line. The water-cooled vacuum forming roll 10 is composed of a rotating forming wheel 10-10 set on a fixed hollow shaft 10-11, and a fixed water jacket 10-9 is arranged around the hollow shaft to form a cold water chamber 10-7. There is a vacuum chamber 10-9-1 in the axial direction. When working, the ratchet on the end face of the sprocket 10-14 is engaged with the ratchet on the end face of the rotating forming wheel to drive the rotating forming wheel 10-10 to fix the water jacket (10-9 ) is the axis rotation. As shown in Figure 5. the

The outer surface of the rotary forming wheel 10-10 is axially provided with annular ribs 10-6 at fixed intervals, annular grooves and evenly distributed air extraction through holes 10-5-2, as shown in Fig. 6, Fig. 7 and Fig. 9 An annular labyrinth forming ring 10-5 with a rectangular cross section is embedded in the annular groove, and the outer surface of each forming ring is engraved with N sets of labyrinth grooves 10-5-3 at equal intervals along the circumference, and the bottom of the groove is set with a diameter of 0.5 to The 0.6mm labyrinth air extraction through hole 10-5-1 communicates with the larger air extraction through hole 10-5-2 uniformly distributed on the circumference of the rotary forming wheel, and the diameter of the air extraction through hole 10-5-2 is 2 to 3mm. The hole spacing is 10-12mm. When the air pumping through hole 10-5-2 is rotated to the position of the vacuum chamber 10-9-1 of the water cooling shaft, the vacuum condition is formed, and the rotating forming wheel between the annular rib 10-6 and the labyrinth forming ring 10-5 On the surface, pump out the water passage 10-5-5 of the drip irrigation belt, and pump out the water outlet labyrinth at the labyrinth groove 10-5-3, and at the same time, the annular convex rib 10-6 and the convex part of the annular labyrinth forming ring 10-5 Press the semi-molten drip irrigation tape with the flexible pressure roller. the

Other parts of the inner surface of the rotary forming wheel 10-10 are isolated from the vacuum chamber 10-9-1, without forming a vacuum condition, and are in contact with the surface of the outer diameter of the fixed hollow shaft. The forming wheel cools down quickly. the

The labyrinth groove 10-5-3 of the labyrinth forming ring 10-5 can be carved into any shape according to hydraulic performance requirements. After rotating the forming wheel 10-10 to inlay the labyrinth forming ring, the outer diameter of the forming ring is the same as the outer diameter of the annular rib. the

The vacuum chamber 10-9-1 shown in Fig. 4 is connected with the hollow shaft 10-11 through the suction transition pipe 10-8, one end of the hollow shaft is blocked, and the other end is connected to the suction port 10-1, and the suction port passes through the vacuum suction pipe 23, vacuum The exhaust valve 28 is connected with a vacuum pump 30 . the

As shown in Figure 8, the fixed hollow shaft 10-11, the fixed water jacket 10-9 and the end covers 10-4, 10-12 constitute the cold water chamber 10-7, and the cooling water inlet 10-3-1 and the outlet of the cooling water are arranged on the end cover. Nozzle 10-3-2. the

This water-cooled vacuum forming roller for producing vacuum heat-sealed drip irrigation belt can be matched with a plastic extruder, and can also be used with a plastic blown film machine. The working principle includes: the two plastic sheets A and B extruded by the plastic extruder hang down into the gap between the flexible pressure roller 15 and the water-cooled vacuum forming roller 10 by gravity, and the plastic is pressed together between the flexible pressure roller and the water-cooled vacuum forming roller. At the same time as the thin sheet, the water-cooled vacuum forming roller vacuum suctions and forms multiple drip irrigation belt water passages and water outlet labyrinths on the thick B sheet. the

When the equipment is installed, the outer circle of the flexible pressure roller is tangent to the center of the vacuum chamber of the water-cooled sleeve of the forming roller at 10-12 degrees clockwise. the

The specific operations include: start the forming roller driving motor while the extruder is working, drive the forming roller 10, and then start the cylinder 14, the cylinder piston pushes the flexible pressure roller shaft, and evenly presses on the water-cooled vacuum forming roller installed in parallel with it. At this time, driven by the forming roller, the flexible pressure roller rotates in opposite directions synchronously with the forming roller. the

Adjust the rotation speed of the forming roller. Under the pressing action of the forming roller and the flexible pressure roller, the semi-molten plastic sheet is stretched, pulled, and cooled, and the parts that need to be bonded are quickly bonded on the other hand. At the same time, it is vacuumed. Suction, a plurality of drip irrigation tapes through the water channel and the water outlet labyrinth are formed by suction. the

When working, the water-cooled shaft sleeve of the water-cooled vacuum forming roller is fed with cooling water, the air extraction valve 28 is opened, the vacuum pump 30 is started, and the plastic sheet B is sucked to form the water passage and the water outlet labyrinth. At the same time, the two layers of plastic sheets A and B are adhered Together, the working vacuum is regulated by the exhaust valve 27. the

As mentioned above, the main innovation of this utility model is that it is matched with the double-die head plastic extruder to design a large-scale drip irrigation belt forming roller with multiple water passages and water outlet labyrinths, as well as its vacuum suction and cooling system and structure. The new type has changed the working mode of extrusion and vacuum blister equipment. On the premise of ensuring the processing accuracy, it has greatly improved the production efficiency of blister drip irrigation belts, and can process 12-24 drip irrigation belts at the same time. the

The above description is only proposed as an implementable technical solution of the water-cooled vacuum forming roller for the production of vacuum heat-sealed drip irrigation belt of the present invention, and not as a restrictive condition for its structure or technology. the

Claims (7)

1. A water-cooled vacuum forming roll for producing a vacuum heat-sealed drip irrigation belt, characterized in that, the water-cooled vacuum forming roll (10) is set on a fixed hollow shaft (10-11) by a rotary forming wheel (10-10) Composition, a fixed water jacket (10-9) is arranged around the hollow shaft to form a cold water chamber (10-7), and a vacuum chamber (10-9-1) is arranged axially between the hollow shaft and the rotating forming wheel. The ratchet teeth on the end face of the wheel (10-14) are engaged with the ratchet teeth on the end face of the rotary forming wheel, which drives the rotary forming wheel (10-10) to rotate with the fixed water jacket (10-9) as an axis. 2. the water-cooled vacuum forming roll of producing vacuum heat-sealed drip irrigation belt according to claim 1, is characterized in that, described rotary forming wheel (10-10) outer surface is axially provided with fixed-spaced ring ribs (10 -6), annular groove and evenly distributed air extraction through holes (10-5-2), the circular labyrinth forming ring (10-5) with a rectangular cross section embedded in the annular groove, the rotating forming wheel (10-10 ) after the labyrinth forming ring is inlaid, the outer diameter of the forming ring is the same as the outer diameter of the annular rib. 3. the water-cooled vacuum forming roll of producing vacuum heat-sealed drip irrigation belt according to claim 2, is characterized in that, the labyrinth groove (10- 5-3), the shape of the labyrinth groove is designed according to the hydraulic performance requirements, and the labyrinth air extraction through hole (10-5-1) is arranged at the bottom of the groove to communicate with the air extraction through hole (10-5-2) of the rotary forming wheel. When the air pumping hole is rotated to the position of the vacuum chamber (10-9-1) of the water-cooling shaft, the vacuum condition is formed, and it is outside the rotating forming wheel between the annular rib (10-6) and the labyrinth forming ring (10-5). On the surface, pump out the water passage (10-5-5) of the drip irrigation tape, and pump out the water outlet maze at the labyrinth groove (10-5-3), and at the same time, the annular convex rib (10-6) and the annular labyrinth forming ring (10-5) The raised part presses the drip irrigation tape. 4. the water-cooled vacuum forming roll of producing vacuum heat-sealed drip irrigation belt according to claim 3, is characterized in that, the air extraction through hole (10-5-2) that is set on the described rotary forming wheel is arranged greater than the labyrinth forming ring The labyrinth pumps through holes (10-5-1). 5. the water-cooled vacuum forming roll of producing vacuum heat-sealed drip irrigation belt according to claim 1, is characterized in that, described vacuum chamber (10-9-1) connects hollow shaft ( 10-11) connection, one end of the hollow shaft is blocked, and one end is connected to the air extraction port (10-1), and the air extraction port is connected with the vacuum pump (30) by the vacuum extraction pipe (23), the vacuum extraction valve (28). 6. The water-cooled vacuum forming roller for producing vacuum heat-sealed drip irrigation belt according to claim 1, characterized in that, the fixed hollow shaft (10-11) and the end caps (10-4, 10-12) constitute a cold water chamber (10-7), cooling water inlet (10-3-1) and water outlet (10-3-2) are set on the end cover. 7. the water-cooled vacuum forming roll of producing vacuum heat-sealed drip irrigation belt according to claim 1, is characterized in that, described water-cooled vacuum forming roll is arranged on the double-die head screw extruder and is arranged on the extrusion die below, It is juxtaposed with the flexible pressure roller (15) that rotates synchronously in reverse. the

Images