A pipe cooling device

Abstract

The invention discloses a pipe cooling device, which comprises a box body, a pre-cooling water jacket and a cooling mechanism. A cooling cavity is arranged inside the box body, and a pipe inlet and a pipe outlet communicating with the cooling cavity are respectively arranged on the left and right sides of the box body. A sizing sleeve is connected to the position of the pipe inlet. The pre-cooling water jacket and the cooling mechanism are installed in the cooling cavity, and the pre-cooling water jacket is installed in the front stage of the cooling mechanism. The invention is designed with a multi-stage water cooling structure. First, pre-cooling is carried out through the pre-cooling water jacket, and then centralized water supply is realized through the combined water cooling component to achieve the purpose of rapid cooling and shaping. Finally, a continuous cooling effect is formed through the spray water cooling component to ensure that the pipe can be smoothly hardened and formed. The invention can not only achieve the same cooling effect as the immersion water cooling, but also, since the invention mainly uses spray water cooling, the water level line in the box can be lower than the pipe inlet of the cooling box, so the problem that the traditional cooling device is easy to overflow water during the pipe collapse phenomenon can be well solved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic pipe production equipment, and particularly relates to a pipe cooling device. Background Art

[0002] PVC pipes are rigid polyvinyl chloride pipes, which are pipes extruded by hot pressing after mixing polyvinyl chloride resin with stabilizers, lubricants, etc. They are the earliest developed and applied plastic pipes. PVC pipes have strong corrosion resistance, are easy to bond, have a low price, and are hard in texture. They are widely used in fields such as drainage, wastewater, chemicals, heating liquids and cooling liquids, mud, gas, and vacuum systems.

[0003] After being hot extruded from the extruder equipment, PVC pipes first need to be sized and formed through a sizing sleeve, and then enter the cooling device to cool down, so that the pipe wall is fully hardened to form a pipe structure with stiffness (the pipe is soft before cooling). Existing pipe cooling devices generally adopt a water-cooling mode, and in order to ensure the water-cooling quality, an immersion water-cooling method is used, that is, the cooling tank will be filled with cooling water, and the pipes are directly immersed in the water after being input into the cooling tank to achieve full and all-round cooling. Although this structure can better meet the requirements of the cooling operation, there are also certain problems in the use process. Due to reasons such as mixing errors or too thin pipe walls, the pipes output by hot extrusion may have the problem of pipe collapse (that is, the pipe wall collapses, and the surface of the pipe will be deformed and sunken, resulting in waste of this section). When the pipe collapse problem occurs, the pipe input port of the cooling tank is no longer closed, and there will be a local open situation. Since the cooling tank is filled with cooling water, after the open port appears, a large amount of cooling water will gush out from the open port position (originally in a state of whole-pipe transportation, which can block the overflow of cooling water). It is very difficult to effectively collect all the gushing and overflowing cooling water, which will cause water accumulation on the workshop floor, thus causing both the sanitation problem of the workshop production environment and wasting water resources. Therefore, improving the pipe cooling mode has become a key research project for enterprise technological transformation and scientific research. Summary of the Invention

[0004] The purpose of the invention is to overcome the above-mentioned deficiencies of the prior art and provide a pipe cooling device.

[0005] In order to achieve the above purpose, the invention adopts the following technical solutions:

[0006] A pipe cooling device is installed and connected behind the sizing sleeve, and includes a box body, a pre-cooling water sleeve and a cooling mechanism. A cooling cavity is provided inside the box body. A pipe inlet and a pipe outlet communicating with the cooling cavity are respectively opened on the left and right sides of the box body. The sizing sleeve is connected to the pipe inlet position. The pre-cooling water sleeve and the cooling mechanism are installed in the cooling cavity, and the pre-cooling water sleeve is installed in front of the cooling mechanism.

[0007] The pre-cooling water jacket is connected to the pipe inlet position.

[0008] The cooling mechanism includes a combined water-cooling component and a spray water-cooling component. The combined water-cooling component is connected to the pre-cooling water jacket, and the spray water-cooling component is installed after the combined water-cooling component to spray the pipe section that cannot be covered by the combined water-cooling component.

[0009] The combined water-cooling component includes a water diversion hood, a water supply unit, and an immersion cooling tank. The water diversion hood is of a conical structure. The small end of the water diversion hood is connected to the side wall of the pre-cooling water jacket. The water supply unit is installed at the large head position of the water diversion hood. The water supply unit includes a main water supply pipe and an arc-shaped water supply branch pipe. The arc-shaped water supply branch pipe is connected to the lower end position of the main water supply pipe. A number of water supply nozzles are installed on the arc-shaped water supply branch pipe, and all the water supply nozzles are installed towards the inner wall of the large head side of the water diversion hood. The immersion cooling tank is installed below the conveyed pipe, and the side of the water diversion hood is connected to the side of the immersion cooling tank.

[0010] A gap is left between the immersion cooling tank and the outer wall of the pipe. The immersion cooling tank is inclined, and the high point of the immersion cooling tank is set at the position of the pre-cooling water jacket.

[0011] The spray water-cooling component includes a number of spray water pipes. The number of the spray water pipes is evenly distributed with the pipe as the central axis, and a number of water mist nozzles are evenly installed along the length direction of the spray water pipes.

[0012] A water receiving tray is connected and installed outside the box body, and the water receiving tray is installed below the sizing sleeve.

[0013] The beneficial effects of the invention are as follows: The invention is designed with a multi-stage water-cooling structure. First, pre-cooling is carried out through the pre-cooling water jacket, and then centralized water supply is achieved through the combined water-cooling component to achieve the purpose of rapid cooling and shaping. Finally, a continuous cooling effect is formed through the spray water-cooling component to ensure that the pipe can be smoothly hardened and formed. The invention can not only achieve the same cooling effect as the immersion water-cooling, but also, since the invention is mainly based on spray water-cooling, the water level line in the box can be lower than the pipe inlet of the cooling box, so the problem that the traditional cooling device is prone to water overflow during the pipe collapse phenomenon can be well solved. Description of the Drawings

[0014] Figure 1 It is the main structural view of the invention;

[0015] Figure 2 It is Figure 1 The sectional view taken along the line A-A in

[0016] In the figure: sizing sleeve 100, box body 1, cooling chamber 11, pipe inlet 12, pipe outlet 13, pre-cooling water jacket 2, cooling mechanism 3, combined water-cooling assembly 31, water diversion hood 311, water supply unit 312, main water supply pipe 3121, arc-shaped water supply branch pipe 3122, water supply nozzle 3123, immersion cooling tank 313, spray water-cooling assembly 32, spray water pipe 321, water mist nozzle 322, water receiving tray 4. Detailed implementation mode

[0017] The invention will be further described below in conjunction with the accompanying drawings and the detailed implementation mode. Descriptions such as "left" and "right" in the invention are all based on Figure 1 the reference direction:

[0018] As Figures 1 to 2 shown, a pipe cooling device is installed and connected after the sizing sleeve 100 and is used for the rapid cooling and shaping of the pipe after sizing. It includes a box body 1, a pre-cooling water jacket 2, and a cooling mechanism 3. A cooling chamber 11 is provided inside the box body 1, and cooling operations are carried out inside the cooling chamber 11. Pipe inlets 12 and pipe outlets 13 communicating with the cooling chamber 11 are respectively provided on the left and right sides of the box body 1 for the transportation of pipes in and out. The sizing sleeve 100 is connected to the position of the pipe inlet 12 so that the sized pipe can directly enter the cooling chamber 11. The pre-cooling water jacket 2 and the cooling mechanism 3 are installed inside the cooling chamber 11. The pre-cooling water jacket 2 is installed in the front of the cooling mechanism 3. Cooling water circulates inside the pre-cooling water jacket 2. The pipe input from the pipe inlet 12 is still in a hot state. The hot pipe first passes through the pre-cooling water jacket 2, and the pre-cooling water jacket 2 can play a role in pre-cooling, which can preliminarily harden the surface of the pipe wall in advance, make it take shape, and effectively reduce the probability of pipe collapse. The cooling mechanism 3 plays the subsequent rapid cooling effect.

[0019] The pre-cooling water jacket 2 is connected to the position of the pipe inlet 12 so that the input hot pipe is first pre-cooled by the pre-cooling water jacket 2. The length of the pre-cooling water jacket 2 should be designed to be shorter, that is, the travel of the pipe through the pre-cooling water jacket 2 should be shorter. This is because the cooling effect of the pre-cooling water jacket 2 is not good, only for pre-cooling. If the pipe is always cooled by the pre-cooling water jacket 2, the pipe will be insufficiently cooled, which will instead play a reverse role and increase the probability of pipe collapse or deformation.

[0020] The cooling mechanism 3 includes a combined water-cooling component 31 and a spray water-cooling component 32. The combined water-cooling component 3 is connected to the pre-cooling water jacket 2. The spray water-cooling component 32 is installed behind the combined water-cooling component 31 and is used to spray the pipe section that cannot be covered by the combined water-cooling component 31. During the pipe cooling operation, the cooling at the initial input is the most important. In this stage, rapid and sufficient cooling is required to quickly solidify the whole pipe. The cooling effect in this stage determines the deformation amount of the pipe. Therefore, the common practice is to use a fully immersed cooling tank. The pipe is directly immersed and passes through the input cooling tank, so that the outer wall of the pipe is wrapped by the cooling water and the cooling is very sufficient. However, this type of cooling tank has a drawback. Once the pipe collapses, the water in the cooling tank will gush out from the collapsed pipe position, causing environmental sanitation problems such as water accumulation on the workshop floor and a large amount of waste of cooling water. Therefore, the cooling mechanism 3 of the present invention adopts a different cooling mode. The combined water-cooling component 31 can play a role in rapid cooling to meet the rapid cooling and shaping requirements in the initial input stage of the pipe. The spray water-cooling component 32 is used for post-stage cooling to meet the continuous cooling and shaping requirements of the pipe after forming.

[0021] The combined water cooling assembly 31 includes a water diversion hood 311, a water supply unit 312, and an immersion cooling tank 313. The water diversion hood 311 is of a conical structure. The small end of the water diversion hood 311 is connected to the side wall of the pre-cooling water jacket 2. The water supply unit 312 is installed at the large end position of the water diversion hood 311. The water supply unit 312 includes a main water supply pipe 3121 and an arc-shaped water supply branch pipe 3122. The arc-shaped water supply branch pipe 3122 is connected to the lower end position of the main water supply pipe 3121. A number of water supply nozzles 3123 are installed on the arc-shaped water supply branch pipe 3122. The water supply nozzles 3123 are all installed facing the inner wall direction of the large end side of the water diversion hood 311. The immersion cooling tank 313 is installed at the position below the conveyed pipe. The side of the water diversion hood 311 is connected to the side of the immersion cooling tank 313. In the spray cooling mode, to achieve the purpose of rapid cooling at the initial stage of pipe input, it is necessary to increase the spray water volume for the pipe. The conventional method is to increase the opposed nozzles to form a spray with more jet water columns. However, since the initially input pipe is hot and its surface is soft, under the impact of more jet water columns, the pipe wall will be deformed. Although the cooling requirement can be met, the pipe will become a defective product. Therefore, the present invention newly designs the combined water cooling assembly 31 to solve the problem of rapid cooling in the spray mode. The water supply unit 312 of the present invention forms spray water columns. The spray water columns of the water supply unit 312 do not directly spray onto the pipe, but are sprayed onto the inner wall of the water diversion hood 311. Since the water diversion hood 311 is of a conical structure, the water on the inner wall of the water diversion hood 311 will flow down along the inner wall of the water diversion hood 311. The water diversion hood 311 plays a role in diverting water. Due to the shape characteristics of the cone, most of the cooling water will concentrate and flow down to the low point position of the cone, forming a concentrated effect of cooling water, and a small part will directly fall, forming a falling effect of cooling water along the way. The low point of the water diversion hood 311 is exactly the initial input position of the hot pipe. Since most of the cooling water is concentrated, sufficient and best cooling effect can be formed on the just-input pipe. Moreover, since the water column of the water supply nozzle 3123 is not directly facing the pipe and the cooling water flowing down has no impact force, both the concentrated cooling requirement is met and the pipe will not be deformed. The water diversion hood 311 can well meet the cooling requirement of the upper half of the pipe, but the cooling of the lower half of the pipe is poor. Therefore, the present invention designs the immersion cooling tank 313 to solve the cooling problem of the lower half of the pipe. The water flowing down along the water diversion hood 311 will concentrate in the immersion cooling tank 313, making the immersion cooling tank 313 filled with cooling water. After the pipe passes through the immersion cooling tank 313, its lower half is immersed in the immersion cooling tank 313, thus solving the cooling problem of the lower half of the pipe. By combining the use of the water diversion hood 311 and the immersion cooling tank 313, a semi-spray and semi-immersion cooling structure for the pipe can be formed, and this structure can meet the rapid cooling requirement at the initial input stage of the pipe.

[0022] There is a gap between the immersion cooling tank 313 and the outer wall of the pipe. This gap should not be too large and needs to form a water-containing effect in the channel. In this way, it will neither affect the transportation of the pipe at the position of the immersion cooling tank 313, nor will the cooling water accumulate between the immersion cooling tank 313 and the pipe, but will flow between them, forming a covering cooling effect on the lower half of the pipe. The immersion cooling tank 313 is inclined, and the high point of the immersion cooling tank 313 is set at the position of the pre-cooling water jacket 2. In this way, the cooling water will flow along the immersion cooling tank 313 and will not accumulate. Since the position of the pre-cooling water jacket 2 is the high point, the cooling water in the immersion cooling tank 313 will not overflow from the direction of the pre-cooling water jacket 2, but will only flow back into the box body 1.

[0023] The spray water cooling assembly 32 includes a plurality of spray water pipes 321. The plurality of spray water pipes 321 are evenly distributed with the pipe as the central axis. A plurality of water mist nozzles 322 are evenly installed along the length direction of the spray water pipes 321. The number of the spray water pipes 321 is at least 4. The spray water pipes 321 form a circumferential surrounding shape of the pipe. The water mist nozzles 322 form cooling water mist to cover the pipe, forming a comprehensive cooling effect. The spray water cooling assembly 32 is arranged at the rear stage of the combined water cooling assembly 31 and needs to cover the section that the combined water cooling assembly 31 cannot cool. The spray water cooling assembly 32 can form a continuous cooling effect to stabilize and maintain the hardened forming state of the pipe.

[0024] After adopting the solution of the present invention, the cooling water in the box body 1 does not need to be filled as in the traditional mode, and the water level of the cooling water will be lower than the channel height of the sizing sleeve 100. In this way, when the pipe collapse phenomenon occurs, the cooling water in the box body 1 will not spout and overflow due to the too high water level, thus well solving the problem of workshop floor pollution caused by water spraying and overflowing.

[0025] A water receiving tray 4 is connected and installed on the outside of the box body 1. The water receiving tray 4 is installed at the position below the sizing sleeve 100. When the pipe collapses, although there will be no situation where a large amount of cooling water in the traditional cooling box gushes out, there may still be a very small amount of water flowing out. The water receiving tray 4 plays a role in receiving a small part of the overflowing water.

[0026] The above are only the preferred embodiments of the invention and are not intended to limit the invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the invention shall be included in the protection scope of the invention.

Claims

1. A pipe cooling device is installed and connected after the sizing sleeve (100), and includes a box body (1), a pre-cooling water jacket (2) and a cooling mechanism (3), and is characterized in that: Inside the box body (1), there is a cooling cavity (11). On the left and right sides of the box body (1), a pipe inlet (12) and a pipe outlet (13) communicating with the cooling cavity (11) are respectively provided. The sizing sleeve (100) is connected to the position of the pipe inlet (12). The pre-cooling water jacket (2) and the cooling mechanism (3) are installed in the cooling cavity (11). The pre-cooling water jacket (2) is installed in the front stage of the cooling mechanism (3). The cooling mechanism (3) includes a combined water-cooling component (31) and a spray water-cooling component (32). The combined water-cooling component (31) is connected to the pre-cooling water jacket (2). The spray water-cooling component (32) is installed in the rear stage of the combined water-cooling component (31) and is used to spray the pipe section that the combined water-cooling component (31) fails to cover. The combined water-cooling component (31) includes a water diversion hood (311), a water supply unit (312), and an immersion cooling tank (313). The water diversion hood (311) is of a conical structure. The small end of the water diversion hood (311) is connected to the side wall of the pre-cooling water jacket (2). The water supply unit (312) is installed at the large end of the water diversion hood (311). The water supply unit (312) includes a water supply main pipe (3121) and an arc-shaped water supply branch pipe (3122). The arc-shaped water supply branch pipe (3122) is connected to the lower end of the water supply main pipe (3121). A number of water supply nozzles (3123) are installed on the arc-shaped water supply branch pipe (3122). The water supply nozzles (3123) are all installed towards the inner wall direction of the large end of the water diversion hood (311). Since the water diversion hood (311) is of a conical structure, the water on the inner wall of the water diversion hood (311) will flow down along the inner wall of the water diversion hood (311). Most of the cooling water will concentrate and flow to the low point position of the cone body, forming a concentrated effect of the cooling water. A small part will directly fall, forming a falling effect of the cooling water along the way. The low point of the water diversion hood (311) is exactly the initial input position of the hot pipe. Due to the concentration of most of the cooling water, sufficient and best cooling effect can be formed on the just-input pipe. The immersion cooling tank (313) is installed below the conveyed pipe. The side of the water diversion hood (311) is connected to the side of the immersion cooling tank (313). There is a gap between the immersion cooling tank (313) and the outer wall of the pipe. The immersion cooling tank (313) is inclined, and the high point of the immersion cooling tank (313) is set at the position of the pre-cooling water jacket (2).

2. The pipe cooling device according to claim 1, characterized in that: The pre-cooling water jacket (2) is connected to the position of the pipe inlet (12).

3. A pipe cooling device according to claim 1, characterized in that: The spray water-cooling component (32) includes a number of spray water pipes (321). The number of the spray water pipes (321) is evenly distributed with the pipe as the central axis. A number of water mist nozzles (322) are evenly installed along the length direction of the spray water pipes (321).

4. A pipe cooling device as claimed in claim 1, wherein: A water receiving tray (4) is connected and installed outside the box body (1). The water receiving tray (4) is installed below the sizing sleeve (100).

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