Double-effect cooling sizing sleeve for PVC (polyvinyl chloride) pipe

Abstract

The utility model provides a double-effect cooling sizing sleeve for a PVC (polyvinyl chloride) pipe, and belongs to the technical field of pipe production equipment. In order to solve the problem of poor forming quality in the prior art, the double-effect cooling sizing sleeve for the PVC pipe comprises a water cooling sleeve with two through ends, a water inlet communicated with an inner cavity is formed in the side wall of one end of the water cooling sleeve, and a water outlet communicated with the inner cavity is formed in the side wall of the other end of the water cooling sleeve. Two ends of the air cooling sleeve are through, the air cooling sleeve is connected with the water cooling sleeve end to end, an air inlet communicated with the inner cavity is formed in the side wall of one end of the air cooling sleeve, an air outlet communicated with the inner cavity is formed in the side wall of the other end of the air cooling sleeve, and a water outlet communicated with the inner cavity is formed in the side wall of the end, close to the air outlet, of the air cooling sleeve. A water film formed by flowing of cooling water in the water cooling sleeve is used for conducting primary cooling on the pipe, an air film formed by flowing of airflow in the air cooling sleeve is used for conducting secondary cooling on the pipe, and the cooling forming quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipe production equipment technical field relates to a kind of double-effect cooling sizing sleeve for PVC pipe. BACKGROUND

[0002] For the production of PVC pipe in prior art, using extruder to extrude is currently commonly used technical means, but as we all know, pipe is in high temperature and soft state at the beginning of being extruded, due to the characteristics of material and production conditions, to avoid pipe deformation caused by external factors, before cutting and winding, it is often cooled and sized by special equipment.

[0003] The device used in prior art is sizing sleeve, such as the pipe sizing sleeve of circulating cooling disclosed in Chinese patent (application publication number: CN106514989A), which comprises a sizing sleeve main body, a water storage ring is arranged at one end of the sizing sleeve main body, an annular water storage groove is arranged in the water storage ring, and at least one water inlet connected with the water storage groove is arranged on the outer peripheral wall of the water storage ring; a spiral cooling water groove extending from one end to the other end of the water storage groove is arranged on the inner wall of the water storage ring, and a communication hole is arranged between the spiral cooling water groove and the water storage groove.

[0004] In combination with the 0017th paragraph of the specification and the attached Figure 1 、 2 It can be seen that the comparative document supplies water into the water storage groove of the water storage ring through the water inlet of the water inlet nozzle, and the water storage groove and the spiral cooling water groove are communicated through the communication hole, when operating, the extruded pipe is pulled by the traction mechanism cooperating with the copper sleeve, and the cooling water is supplied according to the above-mentioned mode, so that the flowing cooling water contacts the outer wall of the pipe to exchange heat. But in fact, since the heat contained in the just extruded pipe is large, although the above-mentioned structure is used to exchange heat and cool it, the heat transfer process is relatively long, so the cooling and sizing of the pipe need to be continued for a period of time, and in the scheme of the comparative document, although the heat is released through heat exchange when passing through the cooling water sleeve, due to insufficient contact surface, short heat exchange time and other factors, the heat release in the pipe is not complete, so the cooling and sizing effect of the pipe is not ideal, and when being pulled outward, the surface material of the pipe is separated, and the forming quality is poor. SUMMARY

[0005] The utility model aims at the above-mentioned problems existing in prior art, and proposes a double-effect cooling sizing sleeve for PVC pipe, and the technical problem to be solved by the utility model is how to improve the forming quality of pipe.

[0006] The utility model discloses a double -effect cooling sizing sleeve for PVC tubular product, including the water cooling sleeve pipe of two end through, its characterized in being that the water cooling sleeve pipe has the water inlet of communicating with the internal cavity on one end lateral wall, and the other end lateral wall has the water outlet of communicating with the internal cavity, and the double -effect cooling sizing sleeve for PVC tubular product still includes the air cooling sleeve pipe of two end through and with the water cooling sleeve pipe head -tail joint, the air cooling sleeve pipe has the air inlet of communicating with the internal cavity on one end lateral wall, and the other end lateral wall has the air outlet of communicating with the internal cavity, and the air cooling sleeve pipe is close to and has the water outlet on one end lateral wall and set up the drain hole of communicating with the internal cavity.

[0007] Compared with the prior art, the difference of the present application is that: on the basis of the original water cooling sleeve pipe, the air cooling sleeve pipe is additionally arranged, and the internal passages of the water cooling sleeve pipe and the air cooling sleeve pipe are communicated; when being operated and used, the pipe material extruded by the extruder is sequentially passed through the water cooling sleeve pipe and the air cooling sleeve pipe under the traction of the traction device; the water inlet of the water cooling sleeve pipe is connected with the water inlet pipe, and the water outlet of the water cooling sleeve pipe is connected with the water outlet pipe; the pipe material is moved in the water cooling sleeve pipe under the traction, and a layer of flowing water film is formed in the water cooling sleeve pipe and outside the pipe material by the flowing cooling water, so that the pipe material is cooled by the contact between the layer of water film and the outer wall of the pipe material; then, the pipe material is moved into the air cooling sleeve pipe from the water cooling sleeve pipe; the air inlet of the air cooling sleeve pipe is connected with the air inlet pipe, and the air outlet of the air cooling sleeve pipe is connected with the air outlet pipe; the cold air flow is input into the air cooling sleeve pipe through the air inlet pipe and the air inlet by the external air cooling device (such as a cooling fan), and a layer of flowing air film is formed outside the pipe material, so that the pipe material is cooled again by the contact between the layer of air film and the pipe material, which ensures better cooling and shaping effect of the pipe material, effectively reduces the precipitation of the material on the surface of the pipe material during the traction process, and improves the forming quality of the pipe material; in addition, the present application is arranged in this way, especially when the pipe material enters the air cooling sleeve pipe, although there is the air film, there may still be friction between the pipe material and the inner wall of the air cooling sleeve pipe; since the air cooling sleeve pipe and the water cooling sleeve pipe are connected, that is, after the pipe material is preliminarily cooled by the cooling water, a part of the cooling water is discharged from the water cooling sleeve pipe through the water outlet, and a small amount of the cooling water enters the air cooling sleeve pipe along with the pipe material, which lubricates the pipe material and the inner wall of the air cooling sleeve pipe by the existence of the part of the cooling water, so as to prevent the friction between them from being too large; in addition, the part of the cooling water flows in the direction of the air film synchronously and is finally discharged and recycled through the drain hole arranged on the air cooling sleeve pipe, so as to prevent the waste of water resources.

[0008] In the aforementioned dual-effect cooling sizing sleeve for PVC pipes, the inlet is vertically downward and the outlet is vertically upward. This allows the cooling water flowing into the water-cooled sleeve to fill the entire sleeve under the influence of gravity, ensuring the quality of the water film formed within the sleeve and guaranteeing a higher initial cooling effect on the pipe. Furthermore, it allows for a greater volume of cooling water to enter the air-cooled sleeve, ensuring more thorough lubrication of the pipe within the air-cooled sleeve.

[0009] In the aforementioned dual-effect cooling sizing sleeve for PVC pipes, the air inlet and the air outlet are staggered circumferentially along the air-cooled sleeve, and both the air inlet and the air outlet are horizontally and longitudinally arranged. This effectively distinguishes between the water-cooled sleeve and the air-cooled sleeve, ensuring convenient disassembly and maintenance of the dual-effect cooling sizing sleeve. Furthermore, the orientation and height of the air inlet and air outlet prevent cooling water in the air-cooled sleeve from flowing out through either the air inlet or the air outlet.

[0010] In the aforementioned double-effect cooling sizing sleeve for PVC pipes, the drain outlet is vertically downward. The cooling water entering the air-cooled sleeve eventually converges downward under the action of gravity, and moves backward with the pipe under the push of the air film, and is discharged outward from the drain outlet.

[0011] In the aforementioned double-effect cooling sizing sleeve for PVC pipes, the inner and outer diameters of both the water-cooled and air-cooled sleeves are equal. The rear end of the water-cooled sleeve and the front end of the air-cooled sleeve are joined and locked together using fasteners. During pipe passage, this design prevents structural damage due to the different diameters of the water-cooled and air-cooled sleeves, and the fastener-locking connection ensures ease of disassembly and maintenance of the double-effect cooling sizing sleeve.

[0012] Compared with existing technologies, this double-effect cooling sizing sleeve for PVC pipes has the following advantages:

[0013] 1. By combining water-cooled and air-cooled jackets, the water film formed by the flow of cooling water in the water-cooled jacket is used to initially cool the pipe, and the air film formed by the flow of air in the air-cooled jacket is used to cool the pipe a second time. By combining the above two cooling methods, the cooling and forming quality of the pipe is guaranteed.

[0014] 2. A portion of the cooling water is used to enter the air-cooled jacket along with the pipes. While the pipes are cooled by the airflow, this portion of cooling water is used as a lubricating medium to lubricate the pipes between the pipes and the inner wall of the air-cooled jacket. This prevents material from being exuded from the outer wall of the pipes due to friction during the secondary cooling process. Furthermore, a drain outlet is installed on the air-cooled jacket to recycle this portion of the lubricating cooling water, thus avoiding waste of water resources. Attached Figure Description

[0015] Figure 1 is the structural schematic diagram of the double-effect cooling sizing sleeve for PVC pipe.

[0016] Figure 2 is the front view of the double-effect cooling sizing sleeve for PVC pipe.

[0017] Figure 3 is Figure 2 the sectional view along A-A direction.

[0018] Figure 4 is Figure 2 the sectional view along B-B direction.

[0019] Figure 5 is the structural schematic diagram of the water cooling sleeve pipe.

[0020] Figure 6 is the structural schematic diagram of the air cooling sleeve pipe.

[0021] In the figure, 1, water cooling sleeve pipe; 11, water inlet; 12, water outlet; 2, air cooling sleeve pipe; 21, air inlet; 22, air outlet; 23, drain. DETAILED DESCRIPTION

[0022] The following is a specific embodiment of the present application and further describes the technical scheme of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0023] As Figure 1 , Figure 2 , Figure 5 and Figure 6 indicated, the double-effect cooling sizing sleeve for PVC pipe comprises a water cooling sleeve pipe 1 and an air cooling sleeve pipe 2, which are in the shape of a long strip and have through holes at both ends, a water inlet 11 and a water outlet 12 are arranged on the outer side wall of the water cooling sleeve pipe 1 and are connected to the internal cavity, the water inlet 11 is arranged on the side wall of one end of the water cooling sleeve pipe 1 and is arranged vertically downward, the water outlet 12 is arranged on the other end of the water cooling sleeve pipe 1 and is arranged vertically upward, an air inlet 21 and an air outlet 22 are arranged on the outer side wall of the air cooling sleeve pipe 2 and are connected to the internal cavity, the air inlet 21 is arranged on the side wall of one end of the air cooling sleeve pipe 2 along the horizontal direction, the air outlet is arranged on the side wall of the other end of the air cooling sleeve pipe 2 along the horizontal direction, and the air inlet 21 and the air outlet 22 are arranged in a staggered manner along the circumferential direction of the air cooling sleeve pipe 2, and the specific staggered angle is 180 degrees, in addition, a drain 23 is arranged on the outer side wall of one end of the air cooling sleeve pipe 2, which is connected to the internal cavity, and the drain 23 is arranged vertically downward.

[0024] In combination Figure 3 with Figure 4The cavity inner diameter of the water cooling sleeve 1 is the same as the cavity outer diameter of the air cooling sleeve 2, and the outer diameter of the water cooling sleeve 1 is also the same as the outer diameter of the air cooling sleeve 2, when the two are connected and assembled, the rear end of the water cooling sleeve 1 is aligned with the front end of the air cooling sleeve 2, and the two are screwed and locked by screws or bolts.

[0025] When the operation processing is performed, the pipe material extruded by the extruder enters from the front end of the water cooling sleeve 1, and under the traction of the traction device, the pipe material moves along the length direction of the water cooling sleeve 1, in this process, the water pipe connected externally supplies cooling water into the water cooling sleeve 1 through the water inlet 11, the flowing cooling water adheres to the outer surface of the pipe material due to the existence of the pipe material, so that the cooling water forms a water film outside the pipe material in the water cooling sleeve 1, the flowing cooling water enters through the water inlet 11 and is discharged through the water outlet 12, and by continuously circulating, the formed water film keeps a low temperature state, and heat exchange is performed between the water film and the pipe material moved by traction, so that the pipe material is cooled once, after that, the pipe material is pulled through the water cooling sleeve 1 and enters the air cooling sleeve 2, the external air cooling device (fan) is started and generates a low-temperature air flow supplied into the cavity of the air cooling sleeve 2, the flowing air flow adheres to the outer surface of the pipe material due to the existence of the pipe material, so that the air flow forms an air film outside the pipe material in the air cooling sleeve 2, the air flow enters through the air inlet 21 and is discharged through the air outlet 22, and by continuously circulating, the formed air film keeps a low temperature state, and heat exchange is performed between the air film and the pipe material moved by traction, so that the pipe material is cooled twice, it is worth mentioning that, since the cavity in the water cooling sleeve 1 and the cavity in the air cooling sleeve 2 are connected, in the above process, part of the cooling water in the water cooling sleeve 1 will enter the air cooling sleeve 2 together with the pipe material, the part of the cooling water moves synchronously with the flowing air flow, plays a lubricating role on the pipe material in the air cooling sleeve 2, avoids frictional interference between the outer wall of the pipe material and the inner wall of the air cooling sleeve 2, prevents the material on the outer surface of the pipe material from being precipitated in the process of cooling the pipe material twice, and moreover, the part of the cooling water converges downward under the action of gravity, is finally pushed by the air flow and discharged outward through the drain 23 for recycling, so that the waste of water resources is effectively prevented.

[0026] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or adopt similar ways to replace them, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0027] Although the terms water cooling jacket 1, water inlet 11, water outlet 12, air cooling jacket 2, air inlet 21, air outlet 22, and water outlet 23 are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the present application; any interpretation of them as an additional limitation is contrary to the spirit of the present application.

Claims

1. A double effect cooling sizing sleeve for PVC pipes comprising a water cooled sleeve (1) through which both ends pass, characterized in that, One end of the water cooling sleeve (1) has a water inlet (11) on the side wall, which is communicated with the internal cavity; the other end has a water outlet (12) on the side wall, which is communicated with the internal cavity; the double-effect cooling sizing sleeve for PVC pipes further comprises a wind cooling sleeve (2) penetrating through both ends and connected with the water cooling sleeve (1) end to end; one end of the wind cooling sleeve (2) has an air inlet (21) on the side wall, which is communicated with the internal cavity; the other end has an air outlet (22) on the side wall, which is communicated with the internal cavity; and the wind cooling sleeve (2) is provided with a drainage port (23) on the side wall near the end with the air outlet (22), which is communicated with the internal cavity.

2. The double effect cooling sizing sleeve for PVC pipe as claimed in claim 1 wherein, The water inlet (11) is vertically downward; and the water outlet (12) is vertically upward.

3. The double-effect cooling sizing sleeve for PVC pipe according to claim 1 or 2, characterized in that, The air inlet (21) and the air outlet (22) are circumferentially staggered along the wind cooling sleeve (2); and the air inlet (21) and the air outlet (22) are both horizontally longitudinally arranged.

4. The double-effect cooling sizing sleeve for PVC pipe according to claim 3, characterized in that, The drainage port (23) is vertically downward.

5. The double-effect cooling sizing sleeve for PVC pipe according to claim 4, characterized in that, The inner diameter and the outer diameter of the water cooling sleeve (1) and the wind cooling sleeve (2) are equal; and the rear end of the water cooling sleeve (1) and the front end of the wind cooling sleeve (2) are connected and locked by fasteners.

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