An improved sizing sleeve with gradient cooling water system

Abstract

The utility model discloses an improved sizing sleeve containing a gradient cooling water system, comprising a cooling copper sleeve, a cooling water system, a sizing copper sleeve, a water film ring, a first water inlet, a second water inlet, a third water inlet, a spiral water tank, a mounting disc, and a through hole. Cooling water with three water temperatures of 60°C, 40°C, and 20°C is used to enter the front, middle, and rear ends of the cooling copper sleeve to achieve gradient cooling of the tube blank to be formed, so that the hot tube blank to be formed is slowly cooled in a gradient manner in the sizing sleeve while being sized and shaped. Not only is faster cooling achieved, but also excessive stress concentration in the pipe is avoided, and even microcracks are formed, so as not to affect the performance and use of the pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe manufacturing, in particular to an improved sizing sleeve with a gradient cooling water system. Background Art

[0002] Plastic pipe production line equipment includes: mixer, feeder, screw extruder, die head, sizing sleeve, cooling system, blister forming machine, tractor, cutting machine, etc. Among them, the sizing sleeve plays a role in cooling and shaping the pipe during the pipe production process. Only with good cooling effect, the pipe will shrink less in the later stage, the thickness will be uniform, the aperture of the inner and outer walls of the pipe will be reduced, the outer wall will be smooth, and the shaping effect will be good, thereby increasing the production speed and reducing the production cost.

[0003] At present, most plastic pipes use vacuum sizing sleeves. After the pipe embryo enters the sizing device, it is cooled by spraying or immersion in the vacuum box. The cooling water on the outer surface of the conventional sizing sleeve is not sufficient and uniform. The cooling water cannot cool the outer surface of the pipe product, and most of the cooling water is sucked away by the vacuum pump behind. The cooling water left for the sizing sleeve is not enough to cool the entire pipe product, resulting in insufficient cooling of the outer wall of the pipe product, and the size and shape accuracy of the pipe and the good surface quality cannot be well guaranteed; and there are many unreasonable aspects in the structural design of the sizing sleeve and the cooling system, resulting in poor cooling effect, slow sizing speed, and high manufacturing cost.

[0004] The raw materials are granulated in the screw extruder and then continue to enter the die. Due to the difference in the melting point of the raw materials, the temperature of the granulation and die die is about 160-260℃. The raw materials then enter the sizing sleeve from the die die. If the cooling speed is too fast, especially at the front end of the sizing sleeve, the raw materials will suddenly and quickly go from high temperature to low temperature, which will cause excessive stress concentration in the pipe and even form micro cracks, affecting the performance and use of the pipe. Therefore, in the cooling and shaping process of plastic pipes, it is required to cool down or cool faster, but not too quickly. It is very necessary to find a balance point or design a more reasonable cooling or cooling method. Summary of the invention

[0005] The utility model aims to solve the deficiencies of the prior art and to provide an improved sizing sleeve containing a gradient cooling water system.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] An improved sizing sleeve with a gradient cooling water system adopts cooling water of three temperatures, 60°C, 40°C and 20°C, at the front, middle and rear ends of the cooling copper sleeve respectively, so as to realize gradient cooling of the tube blank to be formed, so that the hot tube blank to be formed can be sized and formed while being slowly cooled in a gradient manner in the sizing sleeve.

[0008] An improved sizing sleeve with a gradient cooling water system comprises a cooling copper sleeve, a cooling water system and a sizing copper sleeve.

[0009] The front part of the improved sizing sleeve is a cooling copper sleeve, and the rear part is a sizing copper sleeve. The cooling copper sleeve and the sizing copper sleeve are an integral structure of a hollow cylinder with the same inner and outer diameters. The cooling copper sleeve is mechanically connected to the front end of the machine head mold by bolts, and the sizing copper sleeve is arranged inside the subsequent cooling system.

[0010] A water film ring body is arranged on the inner wall of the front end of the cooling copper sleeve, and an annular spiral water trough is arranged inside the cooling copper sleeve and the water film ring body. The cooling copper sleeve, the water film ring body and the spiral water trough are arranged coaxially, and a number of small holes are evenly distributed on the spiral water trough. A number of water inlets are evenly and symmetrically distributed around the center of the circle on the outer wall of the cooling copper sleeve, and the first water inlet, the second water inlet and the third water inlet are arranged from the front end, the middle part to the rear end. The water inlet and the water inlet pipe are connected in a detachable manner. The water inlet is screwed to the outer wall of the cooling copper sleeve by an external hexagonal nut and reinforced with a sealing ring. The circular inner wall at the other end of the external hexagonal nut is connected to a plastic buckle and reinforced with a rubber sealing ring, and the installation and removal of the water inlet pipe are realized by a pressable manner of the plastic buckle. The water inlet pipe is connected to the cooling water system with a metal sleeve. A mounting disc is welded on the outer wall of the rear end of the cooling copper sleeve. The mounting disc is provided with a plurality of mounting holes symmetrically distributed along the center of the circle at the edge thereof and is threadedly connected to the sizing copper sleeve via a hexagon socket nut.

[0011] The cooling water system is composed of a chiller, a control unit, a first normal temperature water inlet, a second normal temperature water inlet, a water heater, a hot water outlet, a first water tank, a second water tank, a third water tank, a first temperature measuring device, a second temperature measuring device, a third temperature measuring device, a first cooling water outlet, a second cooling water outlet, and a third cooling water outlet. The chiller is composed of two groups of compressors, the control unit is arranged on the chiller, the first normal temperature water inlet is connected to the water heater by a metal ferrule, the hot water outlet and the second normal temperature water inlet are connected to the chiller by a metal ferrule, the first water tank, the second water tank, and the third water tank are located in the chiller, the first temperature measuring device, the second temperature measuring device, and the third temperature measuring device are respectively located at the first cooling water outlet, the second cooling water outlet, and the third cooling water outlet, and are respectively electrically connected to the control unit.

[0012] A plurality of through holes are provided on the outer wall of the sizing copper sleeve, and the through holes are arranged at equal intervals along the central axis of the sizing copper sleeve and are staggered and evenly distributed.

[0013] Preferably, the first water tank, the second water tank and the third water tank are separated by partitions.

[0014] Preferably, the water heater comprises a heating mechanism, a temperature measuring device and a control unit.

[0015] By adopting the above technical solution, the temperature of the hot water at the hot water outlet is controlled by the temperature measuring device and the control unit to be greater than 60°C.

[0016] Preferably, the outside of the water pipes at the hot water outlet and the first cooling water outlet is wrapped with a heat insulation layer.

[0017] By adopting the above technical solution, the heat insulation layer can not only prevent the staff from touching the outer wall of the heating tube and causing burns, but also reduce the heat loss.

[0018] Preferably, the first cooling water outlet, the second cooling water outlet and the third cooling water outlet are respectively connected to the first water inlet, the second water inlet and the third water inlet of the cooling copper sleeve by means of a water inlet pipe and a six-way valve or an eight-way valve.

[0019] By adopting the above technical scheme, cooling water can enter from each of the 6 or 8 water inlets evenly and symmetrically distributed on the outer wall of the cooling copper sleeve, namely the first water inlet, the second water inlet, and the third water inlet, so that the distribution of cooling water is more uniform, and the flow speed and cooling speed of cooling water are accelerated.

[0020] Preferably, the through hole is a rectangular through hole, a waist-shaped through hole or a circular through hole.

[0021] By adopting the above technical scheme, water at room temperature directly enters the chiller on the one hand, and enters the hot water machine on the other hand to be heated into hot water >60℃, and then is introduced into the chiller. Under the joint action of the temperature measuring device and the control unit of the chiller, the room temperature water and hot water discharge cooling water of three water temperatures of 60℃, 40℃ and 20℃, and enter the front end, middle part and rear end of the cooling copper sleeve respectively, so as to realize gradient cooling of the tube blank to be formed, so that the hot tube blank to be formed can be slowly cooled in a gradient manner in the sizing sleeve while being sizing and shaping.

[0022] The beneficial effects of the utility model are:

[0023] The cooling water with three water temperatures of 60℃, 40℃ and 20℃ is used to enter the front, middle and rear ends of the cooling copper sleeve to achieve gradient cooling of the tube to be formed, so that the hot tube to be formed is slowly cooled in the sizing sleeve while being sized and shaped. It not only achieves faster cooling, but also avoids excessive stress concentration in the tube, and even the formation of micro cracks, so as not to affect the performance and use of the tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0025] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0026] Figure 1 The utility model discloses an improved sizing sleeve with a gradient cooling water system.

[0027] Figure 2 The utility model discloses a schematic diagram of the cooling water system structure of an improved sizing sleeve including a gradient cooling water system.

[0028] Figure 1 As shown in: 1. Cooling copper sleeve, 2. Cooling water system, 3. Sizing copper sleeve, 100. Water film ring, 101. First water inlet, 102. Second water inlet, 103. Third water inlet, 104. Spiral water groove, 105. Mounting disc, 301. Through hole.

[0029] Figure 2 As shown in: 201, chiller, 202, control unit, 203, first normal temperature water inlet, 204, second normal temperature water inlet, 205, water heater, 206, hot water outlet, 207, first water storage tank, 208, second water storage tank, 209, third water storage tank, 210, first temperature measuring device, 211, second temperature measuring device, 212, third temperature measuring device, 213, first cooling water outlet, 214, second cooling water outlet, 215, third cooling water outlet. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The terms such as "left", "right", "upper", "lower" etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships shall be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0032] Reference Figure 1 The utility model discloses an improved sizing sleeve containing a gradient cooling water system, comprising a cooling copper sleeve 1, a cooling water system 2, a sizing copper sleeve 3, a water film ring body 100, a first water inlet 101, a second water inlet 102, a third water inlet 103, a spiral water groove 104, a mounting disc 105, and a through hole 301.

[0033] Reference Figure 2 The utility model proposes an improved cooling water system 2 of a sizing sleeve containing a gradient cooling water system, which consists of a chiller 201, a control unit 202, a first normal temperature water inlet 203, a second normal temperature water inlet 204, a hot water machine 205, a hot water outlet 206, a first water storage tank 207, a second water storage tank 208, a third water storage tank 209, a first temperature measuring device 210, a second temperature measuring device 211, a third temperature measuring device 212, a first cooling water outlet 213, a second cooling water outlet 214, and a third cooling water outlet 215.

[0034] The working process of cooling water system 2 is as follows:

[0035] 1. Normal temperature water enters the water heater 205 from the first normal temperature water inlet 203, and the heating mechanism, temperature measuring device and control unit of the water heater 205 jointly generate hot water with a temperature > 60°C, so that the hot water temperature at the hot water outlet 206 is > 60°C, and then enters the chiller 201.

[0036] Preferably, the hot water temperature at the hot water outlet 206 is 65-70°C.

[0037] 2. Normal temperature water enters the chiller 201 from the second normal temperature water inlet 204.

[0038] 3. The chiller 201 works, and the control unit 202, the first temperature measuring device 210, the second temperature measuring device 211, and the third temperature measuring device 212 work together to keep the water temperatures in the first water tank 207, the second water tank 208, and the third water tank 209 at about 60°C, 40°C, and 20°C, respectively;

[0039] 4. Cooling water with temperatures of 60°C, 40°C, and 20°C is discharged from the first cooling water outlet 213, the second cooling water outlet 214, and the third cooling water outlet 215, respectively.

[0040] The working process of the cooling copper sleeve 1 and the sizing copper sleeve 3 is as follows:

[0041] 1. Cooling water with water temperature of 60℃, 40℃ and 20℃ flows into the first water inlet 101, the second water inlet 102 and the third water inlet 103 of the cooling copper sleeve 1 through the water inlet pipe and the six-way valve or the eight-way valve, and enters the front end, middle part and rear end of the cooling copper sleeve 1.

[0042] 2. Cooling water with temperatures of 60°C, 40°C, and 20°C respectively enters the cooling copper sleeve 1 and the water film ring 100 at its front end, and then respectively enters the wall of the spiral water trough 104. There are a number of small holes evenly distributed on the spiral water trough 104, and the cooling water can flow into the spiral water trough 104 from the small holes. As the spiral water trough 104 rotates, the cooling water also continuously flows in a spiral in the trough, so that the tube blank to be formed is cooled in a gradient manner and the tube is prevented from sticking to the inner wall of the cooling copper sleeve 1.

[0043] 3. After the formed tube is cooled in a gradient manner, it enters the sizing copper sleeve 3.

[0044] 4. Since the sizing copper sleeve 3 is in a vacuum cooling system, the external space of the sizing copper sleeve 3 is in a vacuum state, so the negative pressure generated acts on the tube to be formed through the through hole 301, and the tube to be formed is firmly adsorbed on the inner wall of the sizing copper sleeve 3, and vacuum cooling and sizing are performed again.

[0045] Of course, the embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An improved sizing sleeve with a gradient cooling water system, characterized in that: The invention comprises a cooling copper sleeve (1), a cooling water system (2) and a sizing copper sleeve (3); the front part of the improved sizing sleeve is the cooling copper sleeve (1), and the rear part is the sizing copper sleeve (3); the cooling copper sleeve (1) and the sizing copper sleeve (3) are hollow cylindrical integral structures with the same inner and outer diameters; the cooling copper sleeve (1) is mechanically connected to the front end of the machine head mold by bolts; the sizing copper sleeve (3) is arranged inside the subsequent cooling system; a water film ring body (100) is arranged on the inner wall of the front end of the cooling copper sleeve (1); an annular spiral water groove (104) is arranged inside the cooling copper sleeve (1) and the water film ring body (100); the cooling copper sleeve (1), the water film ring body (100) and the spiral water groove (104) are coaxially arranged; a plurality of small holes are evenly distributed on the spiral water groove (104); a spiral water groove (104) is arranged around the outer wall of the cooling copper sleeve (1); A plurality of water inlets are evenly and symmetrically distributed at the center of the circle, and are sequentially arranged from the front end, the middle part to the rear end as the first water inlet (101), the second water inlet (102), and the third water inlet (103). The water inlets are connected to the water inlet pipe in a detachable manner. The water inlet is screwed to the outer wall of the cooling copper sleeve (1) by an external hexagonal nut and reinforced by a sealing ring. The circular inner wall at the other end of the external hexagonal nut is connected to a plastic buckle and reinforced by a rubber sealing ring. At the same time, the plastic buckle can be pressed to install and remove the water inlet pipe. The water inlet pipe is connected to the cooling water system (2) in a metal ferrule manner. A mounting disc (105) is welded on the outer wall of the rear end of the cooling copper sleeve (1). The mounting disc (105) is provided with a plurality of mounting holes symmetrically distributed along the center of the circle at the edge thereof, and is threadedly connected to the sizing copper sleeve (3) by an internal hexagonal nut.

2. The improved sizing sleeve with gradient cooling water system according to claim 1, characterized in that: The cooling water system (2) is composed of a chiller (201), a control unit (202), a first normal temperature water inlet (203), a second normal temperature water inlet (204), a hot water machine (205), a hot water outlet (206), a first water storage tank (207), a second water storage tank (208), a third water storage tank (209), a first temperature measuring device (210), a second temperature measuring device (211), a third temperature measuring device (212), a first cooling water outlet (213), a second cooling water outlet (214), and a third cooling water outlet (215); the chiller (201) is composed of two groups of compressors, the control unit (202) is arranged on the chiller (201), and the The first normal temperature water inlet (203) is connected to the hot water machine (205) by a metal ferrule, the hot water outlet (206) and the second normal temperature water inlet (204) are connected to the chiller (201) by a metal ferrule, the first water storage tank (207), the second water storage tank (208), and the third water storage tank (209) are located in the chiller (201), and the first temperature measuring device (210), the second temperature measuring device (211), and the third temperature measuring device (212) are respectively located at the first cooling water outlet (213), the second cooling water outlet (214), and the third cooling water outlet (215), and are respectively electrically connected to the control unit (202).

3. The improved sizing sleeve with gradient cooling water system according to claim 1, characterized in that: A plurality of through holes (301) are provided on the outer wall of the sizing copper sleeve (3); the through holes (301) are arranged at equal intervals along the central axis direction of the sizing copper sleeve (3) and are staggered and evenly distributed.

4. The improved sizing sleeve with gradient cooling water system according to claim 2, characterized in that: The first water storage tank (207), the second water storage tank (208) and the third water storage tank (209) are separated by partitions.

5. The improved sizing sleeve with gradient cooling water system according to claim 2, characterized in that: The water heater (205) comprises a heating mechanism, a temperature measuring device and a control unit.

6. The improved sizing sleeve with gradient cooling water system according to claim 2, characterized in that: The outside of the water pipes at the hot water outlet (206) and the first cooling water outlet (213) is wrapped with a heat insulation layer.

7. The improved sizing sleeve with gradient cooling water system according to claim 2, characterized in that: The first cooling water outlet (213), the second cooling water outlet (214), and the third cooling water outlet (215) are respectively connected to the first water inlet (101), the second water inlet (102), and the third water inlet (103) of the cooling copper sleeve (1) by means of water inlet pipes and a six-way valve or an eight-way valve.

8. The improved sizing sleeve with gradient cooling water system according to claim 3, characterized in that: The through hole (301) is a rectangular through hole, a waist-shaped through hole or a circular through hole.

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