Water cooling system for drip irrigation tape production

Abstract

A water cooling system for drip irrigation tape production belongs to the technical field of drip irrigation tape production, and comprises an extruder device and a vacuum shaping and cooling device, a water cooling pool and a spraying pool are arranged to cool and shape a drip irrigation tape extruded by the extruder device twice, during use, part of cooling water in the water cooling pool flows into a heat exchanger through a tube pass inlet, and the vacuum shaping and cooling device is used for cooling and shaping the drip irrigation tape. Heat exchange is carried out in the tube pass of the heat exchanger, and the cooled cooling water enters the spraying pool to carry out secondary cooling on the drip irrigation tape; afterwards, the cooling water in the spraying pool flows into the cooling-water machine and is rapidly cooled in the cooling-water machine, the cooled cooling water enters the heat exchanger through a shell pass inlet of the heat exchanger to cool the cooling water in a tube pass, and finally the cooling water in the shell pass enters the water cooling pool through a first water inlet, so that cyclic utilization of the cooling water is achieved. In the circulation process of the cooling water, the drip irrigation tape is cooled and shaped, and due to the cyclic utilization of the cooling water, new cooling water does not need to be replaced on the whole, so that the use efficiency of the cooling water is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of drip irrigation tape production, and in particular relates to a water cooling system for drip irrigation tape production. Background Art

[0002] Drip irrigation tape uses plastic pipes to deliver water to the roots of crops through holes or drippers on capillary tubes with a diameter of about 10 mm for local irrigation, dripping water evenly and slowly into the soil near the roots of crops.

[0003] In the existing technology, newly produced drip irrigation tapes are mostly cooled by a single water cooling method, using a water cooling pool to cool the drip irrigation tape. At this time, the newly extruded drip irrigation tape needs to be cooled and shaped in the water cooling pool. If the water in the water cooling pool contains a lot of impurities at this time, some of the impurities will be adsorbed on the drip irrigation tape. At the same time, the water temperature in the water cooling pool will slowly rise during the cooling process of the drip irrigation tape, and the water in the water cooling pool will gradually become turbid, failing to meet the cooling requirements of the drip irrigation tape. To circumvent this drawback, pure cooling water is used to cool the drip irrigation tape. At this time, this pure water is used as cooling water to cool the drip irrigation tape. As the number of cooling cycles increases, if the temperature and cleanliness of the pure water in the water cooling pool no longer meet the cooling requirements of the drip irrigation tape, new pure water can be replaced.

[0004] However, although the above method uses new pure water to cool the drip irrigation belt and meets the requirements of cooling the drip irrigation belt, when replacing the new pure water, it is necessary to pump out all the pure water in the water cooling pool and add new pure water again, which causes a waste of pure water in this step and is time-consuming and labor-intensive. Summary of the Invention

[0005] In view of this, it is necessary to provide a water cooling system for drip irrigation belt production that improves water utilization.

[0006] The solution to the technical problem described in this application is:

[0007] A water cooling system for drip irrigation tape production includes an extruder and a cooling and shaping device, wherein the cooling and shaping device includes:

[0008] A water cooling pool, wherein the outlet of the extruder is arranged opposite to the water cooling pool, and the water cooling pool has a first water inlet and a first water outlet;

[0009] a heat exchanger, wherein the tube side inlet of the heat exchanger is connected to the first water outlet;

[0010] The water cooling pool is arranged opposite to the spray pool, and the spray pool has a second water inlet and a second water outlet, the second water inlet is connected to the pipe outlet of the heat exchanger, and

[0011] The chiller is provided with a third water inlet and a third water outlet, the third water inlet is connected to the second water outlet, the third water outlet is connected to the shell side inlet of the heat exchanger, and the shell side outlet of the heat exchanger is connected to the first water inlet.

[0012] Preferably, a transverse connecting shaft and a plurality of atomizing spray heads are provided in the spray pool, the atomizing spray heads are evenly arranged on the transverse connecting shaft, and the atomizing spray heads are connected to the tube outlet of the heat exchanger.

[0013] Preferably, a fan is provided in the spray pool, and the fan is provided at both ends of the transverse connecting shaft and faces the spray pool.

[0014] Preferably, a condensing agent storage tank is further included, and the outlet of the condensing agent storage tank is connected to the chiller.

[0015] Preferably, the heat exchanger is a shell and tube heat exchanger.

[0016] Preferably, a first filter element is further included, the tube outlet of the heat exchanger is connected to the inlet of the first filter element, and the outlet of the first filter element is connected to the second water inlet.

[0017] Preferably, a second filter element is further included, the outlet of the chiller is connected to the inlet of the second filter element, and the outlet of the second filter element is connected to the shell-side inlet of the heat exchanger.

[0018] Beneficial effect: The present application discloses a water cooling system for drip irrigation tape production, comprising an extruder device and a vacuum shaping cooling device. A water cooling pool and a spray pool are provided to cool and shape the drip irrigation tape extruded by the extruder device twice. When in use, part of the cooling water in the water cooling pool flows into the heat exchanger through the tube side inlet, performs heat exchange in the tube side of the heat exchanger, and the cooling water with reduced temperature enters the spray pool for secondary cooling of the drip irrigation tape; thereafter, the cooling water in the spray pool flows into the chiller, is rapidly cooled in the chiller, and the cooled cooling water enters the heat exchanger through the shell side inlet of the heat exchanger, cools the cooling water in the tube side, and finally the cooling water in the shell side enters the water cooling pool through the first water inlet, thereby realizing the recycling of cooling water. During the circulation process of the cooling water, the drip irrigation tape is cooled and shaped, and due to the recycling of the cooling water, there is no need to replace new cooling water as a whole, thereby improving the use efficiency of cooling water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a flow chart of the water cooling system for the production of drip irrigation tapes in this application;

[0020] Figure 2 This is a diagram of the installation of a spray pool in a water cooling system for the drip irrigation tape production of this application.

[0021] In the figure: extruder 10, cooling and shaping device 20, water cooling pool 210, first water inlet 211, first water outlet 212, heat exchanger 220, spray pool 230, second water inlet 231, second water outlet 232, atomizing spray head 233, horizontal connecting shaft 234, fan 235, chiller 240, third water inlet 241, third water outlet 242, condensing agent storage tank 243, first filter element 30, second filter element 40. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction to the drawings required for use in the embodiments will be given below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Please see Figures 1 to 2 A water cooling system for drip irrigation tape production includes an extruder 10 and a cooling and shaping device 20, wherein the cooling and shaping device 20 includes:

[0024] A water cooling pool 210, wherein the outlet of the extruder 10 is arranged opposite to the water cooling pool 210, and the water cooling pool 210 has a first water inlet 211 and a first water outlet 212;

[0025] a heat exchanger 220, wherein the tube-side inlet of the heat exchanger 220 is connected to the first water outlet 212;

[0026] The spray pool 230 is arranged opposite to the water cooling pool 210, and the spray pool 230 has a second water inlet 231 and a second water outlet 232. The second water inlet 231 is connected to the pipe outlet of the heat exchanger 220; and

[0027] The chiller 240 is provided with a third water inlet 241 and a third water outlet 242. The third water inlet 241 is connected to the second water outlet 232, the third water outlet 242 is connected to the shell side inlet of the heat exchanger 220, and the shell side outlet of the heat exchanger 220 is connected to the first water inlet 211.

[0028] Since the drip irrigation tape produced from the extruder 10 is at a high temperature, the drip irrigation tape just extruded needs to be cooled to achieve the purpose of solidification and avoid deformation of the drip irrigation tape.

[0029] The water cooling system for producing the drip irrigation tape first passes the drip irrigation tape produced in the extruder 10 into the cooling and shaping device 20 for cooling and shaping. The steps for using the cooling and shaping device 20 are as follows:

[0030] Step 1: The drip irrigation tape is first cooled and shaped in the water cooling pool 210. At this time, the water temperature in the water cooling pool 210 gradually rises. To avoid poor cooling and shaping effect due to the rising water temperature, a portion of the cooling water in the water cooling pool 210 is passed into the tube side of the heat exchanger 220, and then cooling water with a lower temperature is added (this portion of cooling water comes from the shell side of the heat exchanger 220);

[0031] Step 2: The drip irrigation tape that has undergone the first cooling in the water cooling pool 210 is then passed into the spray pool 230 for secondary cooling. In this step, the cooling water in the spray pool 230 comes from the cooling water in the pipe side of the heat exchanger 220. The cooling water flows into the pipe side of the heat exchanger 220 from the first water outlet 212. After heat exchange in the pipe side of the heat exchanger 220, the cooling water in the pipe side of the heat exchanger 220 is cooled down, and then the cooled cooling water is passed into the spray pool 230 through the second water inlet 231. At this time, the spray pool 230 adopts a mist cooling method for the drip irrigation belt. Firstly, it is to avoid slight deformation of the drip irrigation belt caused by water flow (if the cooling effect of the water cooling pool 210 on the drip irrigation belt is not good, if the water flow is directly brought into contact with the drip irrigation belt, the drip irrigation belt will easily produce slight deformation under the impact of the water flow); secondly, when the atomized cooling water is sprayed on the surface of the drip irrigation belt, it quickly vaporizes and can quickly take away the heat. In addition, the cooling water can take away part of the heat during the vaporization process, thereby reducing the temperature in the spray pool 230; thirdly, the liquid utilization rate is high. The atomized cooling only sprays the liquid on the surface of the processing area, instead of immersing the entire drip irrigation belt in cooling water for cooling and molding, which saves the amount of cooling water.

[0032] Step 3: The cooling water in the spray pool 230 enters the chiller 240 from the second water outlet 232, and the cooling water is rapidly cooled. The cooling water after rapid cooling is then passed into the shell side of the heat exchanger 220, and exchanges heat with the cooling water in the tube side of the heat exchanger 220. After the heat exchange, the cooling water in the shell side of the heat exchanger 220 enters the water-cooled pool 210 through the first water inlet 211, realizing the recycling of cooling water and improving the use efficiency of cooling water. At the same time, it also avoids the situation where all cooling water needs to be replaced due to the increase in cooling water temperature.

[0033] Circulation direction of cooling water: cooling water flows from the first water outlet 212 into the tube side of the heat exchanger 220, flows from the tube side of the heat exchanger 220 into the heat exchanger 220 for heat exchange, then flows into the spray pool 230, and then flows into the chiller 240. After rapidly cooling in the chiller 240, it flows into the shell side of the heat exchanger 220, and finally flows back into the water cooling pool 210.

[0034] It should be made clear here that: when cooling water is contained in both the shell side and the tube side of the heat exchanger 220, the temperature of the cooling water in the tube side is higher than the temperature of the cooling water in the shell side, and when in use, the tube side and the shell side adopt a countercurrent method for heat exchange. At the same time, when the cooling water in the tube side and the shell side are exchanging heat, the temperature of the cooling water in the shell side does not rise much, which does not affect the operating temperature of the cooling water in the water-cooling pool 210.

[0035] At the same time, in this solution, after some of the cooling water in the water cooling pool 210 enters the tube side of the heat exchanger 220, the water temperature has been reduced when it enters the spray pool 230. The reason for the reduction is that it exchanges heat with the cooling water in the shell side.

[0036] After the cooling water cools and shapes the drip irrigation tape for the first time in the water cooling pool 210, it flows into the heat exchanger 220 for heat exchange, and then enters the spray pool 230 to cool and shape the drip irrigation tape for the second time. Finally, it is rapidly cooled in the chiller 240 and then flows back to the water cooling pool 210. At this time, the cooling water is cooled during the circulation process. The cooperation between the chiller 240 and the heat exchanger 220 is used to cool and cool the cooling water to meet the water temperature conditions required for cooling and shaping the drip irrigation tape. At the same time, it avoids the situation where the cooling water needs to be replaced as a whole due to excessive water temperature, thereby improving the use efficiency of cooling water and saving time and effort.

[0037] In a preferred embodiment, a transverse connecting shaft 234 and a plurality of atomizing spray heads 233 are provided in the spray pool 230 . The atomizing spray heads 233 are evenly arranged on the transverse connecting shaft 234 , and the atomizing spray heads 233 are connected to the pipe outlet of the heat exchanger 220 .

[0038] After the drip irrigation belt undergoes the first cooling and shaping in the water cooling pool 210, it enters the spray pool 230 for secondary cooling and shaping. The cooling water in the spray pool 230 comes from: the cooling water in the pipe line of the heat exchanger 220 in the cold water pool is passed into the spray pool 230 after heat exchange to atomize and cool the drip irrigation belt. In addition, when the atomizing spray head 233 is used to perform secondary cooling on the drip irrigation belt, the impact of water flow on the drip irrigation belt is avoided. Because the water temperature in the water cooling pool 210 is not constant, if the water temperature in the water cooling pool 210 is higher, the cooling effect on the drip irrigation belt is not very good, that is, the surface of the drip irrigation belt is softer. At this time, when the cooling water is directly sprayed onto the drip irrigation belt in the spray pool 230, the drip irrigation belt will be deformed. At this time, in order to avoid the occurrence of this situation, the atomizing spray head 233 is used to atomize the cooling water and then perform secondary cooling on the drip irrigation belt, which can avoid this situation. At the same time, the atomizing spray head 233 is suspended in the spray pool 230 through the horizontal connecting shaft 234.

[0039] Furthermore, a fan 235 is provided in the spray pool 230 . The fan 235 is provided at both ends of the transverse connecting shaft 234 and faces the spray pool 230 .

[0040] In order to further reduce the temperature in the spray pool 230, the fan 235 is set in the spray pool 230. When the fan 235 is in use, it reduces the temperature in the spray pool 230, and during the rotation of the fan 235, it takes away part of the heat in the spray pool 230; at this time, the fan 235 can blow air vertically toward the spray pool 230, or it can blow air toward the spray pool 230 at an angle downward.

[0041] In a preferred embodiment, a condensing agent storage tank 243 is further included, and an outlet of the condensing agent storage tank 243 is connected to the chiller 240 .

[0042] The chiller 240 cools down the cooling water flowing out of the spray pool 230. At this time, the water temperature in the chiller 240 will gradually rise. In order to ensure that the water temperature in the chiller 240 is in a low temperature state, the condensing agent storage tank 243 is provided. By adding the condensing agent in the condensing agent storage tank 243 into the chiller 240, it is ensured that the chiller 240 is in a low temperature state.

[0043] Specifically, the heat exchanger 220 is a shell and tube heat exchanger.

[0044] Common shell-and-tube heat exchangers 220 include fixed tube-and-sheet heat exchangers, floating head heat exchangers, stuffing box heat exchangers, and U-tube heat exchangers. They offer a simple structure, low cost, and individual tubes that can be replaced, making the tube interiors easy to clean. Furthermore, the operating pressure in this case is low, and the cooling water contains fewer impurities, making the shell-and-tube heat exchanger more convenient.

[0045] In a specific embodiment, a first filter element 30 is further included, the pipe outlet of the heat exchanger 220 is connected to the inlet of the first filter element 30 , and the outlet of the first filter element 30 is connected to the second water inlet 231 .

[0046] The first filter element 30 is used to filter out impurities in the cooling water to prevent the cooling water entering the second water inlet 231 from clogging the atomizing spray head 233 and causing the atomizing spray head 233 to malfunction.

[0047] In a preferred embodiment, a second filter element 40 is further included, the outlet of the chiller 240 is connected to the inlet of the second filter element 40 , and the outlet of the second filter element 40 is connected to the shell-side inlet of the heat exchanger 220 .

[0048] After the cooling water flows out of the chiller 240, it enters the shell side of the cold heat exchanger 220. Although very few impurities enter the cooling water during the production and cooling process of the drip irrigation tape, if the cooling water used is not softened water, scale will form in the water cooling pool 210 and the spray pool 230. At this time, the scale in the cooling water will enter the chiller 240 with the water flow, causing the scale to precipitate in the chiller 240. Therefore, the second filter element 40 is used to filter out the scale in the water, and during the circulation process of the cooling water, a large amount of scale is prevented from entering the shell side of the heat exchanger 220.

[0049] In another specific embodiment, a third filter element is further included, the second water outlet 232 is connected to the inlet of the third filter element, and the outlet of the third filter element is connected to the third water inlet 241 .

[0050] When the cooling water flows from the spray pool 230 into the water chiller 240, if the cooling water used is not softened water, the cooling water flowing into the chiller 240 contains a large amount of scale and other impurities. At this time, when cooling the cooling water, a large amount of energy will be consumed. The reason is: originally, it was only necessary to cool the cooling water flowing into the chiller 240. At this time, in addition to cooling the cooling water flowing into the chiller 240, it is also necessary to cool the scale and other impurities. Therefore, a third filter element is provided to filter out the scale and other impurities entering the chiller 240.

[0051] The above disclosure is only a preferred embodiment of the present application, and it is certainly not intended to limit the scope of the rights of the present application. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.

Claims

1. A water cooling system for drip irrigation tape production, characterized in that: It includes an extruder and a cooling and shaping device, and the cooling and shaping device includes: A water cooling pool, wherein the outlet of the extruder is arranged opposite to the water cooling pool, and the water cooling pool has a first water inlet and a first water outlet; A heat exchanger, wherein the tube side inlet of the heat exchanger is connected to the first water outlet; A spray pool, the water cooling pool is arranged opposite to the spray pool, the spray pool has a second water inlet and a second water outlet, the second water inlet is connected to the pipe outlet of the heat exchanger, and A chiller, wherein the chiller is provided with a third water inlet and a third water outlet, wherein the third water inlet is connected to the second water outlet, the third water outlet is connected to the shell side inlet of the heat exchanger, and the shell side outlet of the heat exchanger is connected to the first water inlet.

2. The water cooling system for drip irrigation tape production according to claim 1, characterized in that: A transverse connecting shaft and a plurality of atomizing spray heads are arranged in the spray pool. The atomizing spray heads are evenly arranged on the transverse connecting shaft and are connected to the pipe outlet of the heat exchanger.

3. The water cooling system for drip irrigation tape production according to claim 2, characterized in that: A fan is arranged in the spray pool. The fan is arranged at two ends of the transverse connecting shaft and faces the spray pool.

4. The water cooling system for drip irrigation tape production according to claim 1, characterized in that: It also includes a condensing agent storage tank, and the outlet of the condensing agent storage tank is connected to the chiller.

5. The water cooling system for drip irrigation tape production according to claim 1, characterized in that: The heat exchanger is a shell and tube heat exchanger.

6. The water cooling system for drip irrigation tape production according to claim 1, characterized in that: It also includes a first filter element, the tube outlet of the heat exchanger is connected to the inlet of the first filter element, and the outlet of the first filter element is connected to the second water inlet.

7. The water cooling system for drip irrigation tape production according to claim 1, characterized in that: It also includes a second filter element, the outlet of the chiller is connected to the inlet of the second filter element, and the outlet of the second filter element is connected to the shell side inlet of the heat exchanger.

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