Preparation equipment and method of HDPE (high-density polyethylene) direct drinking water pipe with self-cleaning and antibacterial functions
By introducing a guide cylinder and a drive mechanism into the cooling water tank of HDPE drinking water pipes, the problem of pipe swaying affecting molding quality is solved, and the stability and speed of pipe cooling and shaping are achieved. Combined with the self-cleaning function, the cleanliness and temperature control of the cooling water tank are ensured.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-03-27
AI Technical Summary
Existing HDPE drinking water pipes are prone to shaking during the cooling process, which affects the molding quality and speed. Existing cooling water tanks cannot effectively limit the shaking of the pipes.
A cooling water tank with a guide tube is used. The guide tube consists of an L-shaped guide plate, a water permeable groove and a drive mechanism. The spacing between the guide plates is adjusted by the drive mechanism to accommodate different pipe diameters. Temperature control and cleaning are achieved by combining a semiconductor cooling chip and a sensing unit to ensure the cooling and shaping of the pipe.
It effectively limits pipe swaying, ensuring the forming quality and speed of drinking water pipes, and maintains the cleanliness and temperature stability of the cooling water tank through self-cleaning function.
Smart Images
Figure CN121733786A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of water pipe preparation, in particular to a preparation equipment and method of HDPE direct drinking water pipe with self-cleaning and antibacterial functions. BACKGROUND
[0002] With the development of direct drinking water technology, people have changed from drinking boiled water to directly drinking water through pipes, and the drinking water process is becoming safer and more convenient. The direct drinking water pipe is a core component of the direct drinking water pipe system and is used for conveying high-quality drinking water after deep purification treatment. The direct drinking water pipe can be made of 304 / 316 stainless steel, food-grade PE-RT material or HDPE material. Since the direct drinking water pipe made of HDPE material has excellent corrosion resistance, excellent flexibility and impact resistance and good hydraulic performance, it has become the preferred pipe material for modern water supply systems.
[0003] The production of the HDPE direct drinking water pipe adopts an extrusion molding process. After the mixed plastic raw material is melted and plasticized by an extruder, a hot pipe blank is extruded. The hot pipe blank is preliminarily shaped by a vacuum sizing sleeve and then enters a cooling water tank for sufficient cooling to room temperature. The pipe material after cooling and shaping is uniformly pulled by a traction machine.
[0004] The water in the cooling water tank is circulating water, and the pipe material continuously moves under the traction of the traction machine. The quality of some small-bore HDPE direct drinking water pipes is lighter, so the pipe material is easy to shake in the water during the cooling process in the cooling water tank. The existing cooling water tank is only provided with a guide roller for lifting the pipe material and cannot limit the shaking of the pipe material. The large shaking of the pipe material will affect the forming quality and speed of the pipe material. SUMMARY
[0005] In order to overcome the technical problems of the prior art, the application provides a preparation equipment and method of HDPE direct drinking water pipe with self-cleaning and antibacterial functions.
[0006] In a first aspect, the application provides a preparation equipment of HDPE direct drinking water pipe with self-cleaning and antibacterial functions, which adopts the following technical scheme: A preparation equipment of HDPE direct drinking water pipe with self-cleaning and antibacterial functions, comprising an extrusion molding mechanism, a shaping and cooling mechanism and a traction mechanism arranged in sequence. The shaping and cooling mechanism comprises a cooling water tank and a water circulation system for continuously supplying circulating cooling water into the cooling water tank. A guide cylinder for limiting the shaking of the pipe material is arranged in the cooling water tank. The length direction of the guide cylinder is consistent with the length direction of the cooling tank. The pipe material slides through the guide cylinder. A water-permeable groove is formed through the guide cylinder.
[0007] Further, the cross section of the guide cylinder is square, the guide cylinder comprises two L-shaped guide plates, and a plurality of water-permeable grooves are arranged on the side plates on both sides of the guide plates along the length direction of the guide plates, so that the side plates on both sides of the guide plates are formed into a sawtooth shape.
[0008] Further, the portions between the two water-permeable grooves on the side plates of the guide plates are inserted strips, the two guide plates are arranged in a clamping manner, so that the plurality of inserted strips are inserted into the plurality of water-permeable grooves respectively, and the cooling water tank is provided with a driving mechanism for driving the two guide plates to move along the diagonal lines of the guide cylinder towards each other or away from each other.
[0009] Further, the driving mechanism is provided with two groups and corresponds to the two guide plates one by one, the driving mechanism comprises a square rod fixedly connected with the guide plate, a square cylinder fixed in the cooling water tank, and a driving assembly for driving the square rod to move along the diagonal line of the square cylinder, and the square rod is arranged in a sliding manner through the square cylinder.
[0010] Further, the driving assembly comprises a threaded cylinder installed through the side wall of the cooling water tank and a threaded rod threadedly connected at one end in the threaded cylinder, the end of the square rod away from the guide plate extends into the threaded cylinder and is rotationally connected with the end of the threaded rod, and a sealing ring is arranged between the threaded cylinder and the square rod.
[0011] Further, a plurality of scale lines are arranged on the threaded rod along the length direction of the threaded rod.
[0012] Further, a semiconductor refrigeration sheet for refrigeration / heat generation and a sensing unit for sensing temperature are embedded on the inner wall of the water-permeable groove, a control unit is arranged on the outer wall of the cooling water tank, and the semiconductor refrigeration sheet and the sensing unit are electrically connected with the control unit.
[0013] Further, the semiconductor refrigeration sheet and the sensing unit are arranged on the same guide plate, and soft brushes for cleaning are arranged on both sides of the inserted strip of the other guide plate.
[0014] In the second aspect, the application provides a preparation method of the HDPE direct drinking water pipe with self-cleaning and antibacterial functions, based on the preparation equipment of the HDPE direct drinking water pipe with self-cleaning and antibacterial functions, comprising the following steps: S1, raw material mixing, adding a nano-level antibacterial agent in the plastic particles of ultra-high molecular weight polyethylene and uniformly mixing to form the extrusion raw material of the inner layer of the direct drinking water pipe; uniformly mixing ethylene-vinyl alcohol copolymer to form the extrusion raw material of the middle layer of the direct drinking water pipe; uniformly mixing heat-resistant polyethylene to form the extrusion raw material of the outer layer of the direct drinking water pipe; S2, hot pipe blank extrusion molding, the mixed three raw materials are extruded to form a hot pipe blank after being melted and plasticized by the extrusion molding mechanism in the three-layer co-extrusion pipe extruder, the hot pipe blank is preliminarily shaped by a vacuum sizing sleeve, and then enters a cooling water tank for sufficient cooling to room temperature, and the pipe after cooling and shaping is uniformly pulled by a traction machine; S3, hot pipe blank shaping, the hot pipe blank is preliminarily shaped by a vacuum sizing sleeve, and then enters a cooling water tank and passes through a guide cylinder, the hot pipe blank is sufficiently cooled to room temperature in the cooling water tank to form a direct drinking water pipe; S4, direct drinking water pipe packaging, the traction mechanism moves the cooled and shaped direct drinking water pipe away from the cooling water tank, and the direct drinking water pipe is wound and packaged by a coiling machine.
[0015] To sum up, the beneficial technical effects of the present application are: according to the pipe diameter of the direct drinking water pipe, the size of the internal passage of the guide cylinder is adjusted, so that during the process of the hot pipe blank entering the cooling water tank and passing through the guide cylinder for cooling and shaping, the guide cylinder can limit the swing of the hot pipe blank, and the forming quality and speed of the direct drinking water pipe are guaranteed. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application.
[0017] Figure 2 is a front view of the guide cylinder in an embodiment of the present application.
[0018] Figure 3 is a schematic diagram of the structure of the guide cylinder and the driving mechanism in an embodiment of the present application.
[0019] Figure 4 is a schematic diagram of the cross-sectional structure of the driving assembly in an embodiment of the present application.
[0020] Reference signs: 1, extrusion molding mechanism; 2, shaping and cooling mechanism; 3, traction mechanism; 4, guide plate; 5, water-permeable tank; 6, insertion strip; 7, driving mechanism; 71, square rod; 72, square cylinder; 73, driving assembly; 731, threaded cylinder; 732, threaded rod; 8, sealing ring; 9, scale line; 10, semiconductor refrigeration sheet; 11, sensing unit; 12, control unit; 13, soft brush; 14, inclined rod. DETAILED DESCRIPTION
[0021] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0022] The embodiment of the present application discloses a preparation equipment and method of HDPE straight drinking water pipe with self-cleaning and antibacterial functions. Figure 1 The preparation equipment of the HDPE straight drinking water pipe with the self-cleaning and antibacterial functions comprises an extrusion forming mechanism 1, a shaping and cooling mechanism 2 and a traction mechanism 3 arranged in sequence, wherein the shaping and cooling mechanism 2 comprises a cooling water tank and a water circulation system for continuously supplying circulating cooling water into the cooling water tank. After the raw material is melted and plasticized through the extrusion forming mechanism 1, a hot pipe blank is extruded, the hot pipe blank is cooled and shaped into a straight drinking water pipe through the cooling water tank in the shaping and cooling mechanism 2, and then the straight drinking water pipe is uniformly pulled by the traction mechanism 3.
[0023] Since the water in the cooling water tank is circulating water, and the straight drinking water pipe continuously moves under the traction of the traction mechanism 3, the quality of the straight drinking water pipe with a small pipe diameter is relatively light, so that the pipe material is easy to shake in the water during the cooling process in the cooling water tank, thereby affecting the forming quality and speed of the pipe material. Therefore, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , a guide cylinder for limiting the shaking of the pipe material is arranged in the cooling water tank, the length direction of the guide cylinder is consistent with the length direction of the cooling tank, and the pipe material slides through the guide cylinder. The guide cylinder comprises two L-shaped guide plates 4, a plurality of water passing grooves 5 are arranged at the edges of the two sides of the guide plate 4, the plurality of water passing grooves 5 are arranged in the length direction of the guide plate 4, so that the edges of the side plates of the two sides of the guide plate 4 form a sawtooth shape, the part between the two water passing grooves 5 on the side plate of the guide plate 4 is a plug strip 6, and the plurality of plug strips 6 are respectively inserted into the plurality of water passing grooves 5, so that the two guide plates 4 are buckled to form a square frame structure, and the pipe material passes out of the square frame structure. The two guide plates 4 can limit the pipe material from shaking greatly, and the cooling water can enter the guide cylinder through the water passing grooves 5, so as to cool and shape the pipe material.
[0024] In order to adapt the guide cylinder to pipe materials with different pipe diameters, a driving mechanism 7 for driving the two guide plates 4 to move along the diagonal lines of the guide cylinder towards each other / away from each other is arranged on the cooling water tank, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4The driving mechanism 7 is provided with two groups and corresponds to the two guide plates 4 respectively; the driving mechanism 7 comprises a square rod 71 fixedly connected with the guide plate 4, a square cylinder 72 fixed in the cooling water tank and a driving assembly 73 driving the square rod 71 to move along the diagonal direction of the guide cylinder. Two inclined rods 14 are fixed on the inner walls of the two sides of the cooling water tank, and the two inclined rods 14 are distributed on the two sides of the square cylinder 72 and are fixedly connected with the square cylinder 72, so that the square cylinder 72 is horizontally erected in the cooling water tank. One end of the square rod 71 is fixedly connected with the corner of the guide plate 4, and the other end is slid through the square cylinder 72. The length direction of the square rod 71 is consistent with the diagonal direction of the guide cylinder. The driving assembly 73 is arranged on the cooling water tank, the output end of the driving assembly 73 is connected with the end of the square rod 71, and the driving assembly 73 drives the square rod 71 to slide in the square cylinder 72 along the diagonal direction of the guide cylinder, so as to adjust the distance between the two guide plates 4, so that the guide cylinder can adapt to pipes with different diameters.
[0025] For the setting of the driving assembly 73, in other embodiments, the driving assembly 73 can be a pneumatic cylinder, a hydraulic cylinder, an electric push rod, etc. In the embodiment of the present application, the driving assembly 73 comprises a threaded cylinder 731 installed through the side wall of the cooling water tank and a threaded rod 732 screwed at one end into the threaded cylinder 731. Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The inner cavity of the end of the threaded cylinder 731 close to the square rod 71 is set as a square shape matched with the square rod 71, and the other end is set as a circular shape matched with the threaded rod 732 in screwing, and the rod diameter of the threaded rod 732 is smaller than the diameter of the inscribed circle in the cross section of the square rod 71. The end of the square rod 71 away from the guide plate 4 penetrates through the square cylinder 72 and is slid into the square inner cavity of the threaded cylinder 731. One end of the threaded rod 732 is screwed into the threaded cylinder 731 and is rotationally connected with the end of the square rod 71. By rotating the threaded rod 732, the threaded rod 732 drives the square rod 71 to slide in the threaded cylinder 731, so as to adjust the distance between the two guide plates 4, so that the guide cylinder can adapt to pipes with different diameters. In order to more intuitively understand the distance between the two guide plates 4, a plurality of scale lines 9 are arranged on the threaded rod 732 along the length direction thereof. In order to avoid the water in the cooling water tank overflowing outward through the threaded cylinder 731, a sealing ring 8 is installed between the threaded cylinder 731 and the square rod 71.
[0026] Since the cooling water tank has a certain depth, the water temperature at different depths is different. In order to further ensure that the water temperature at each position is as same as possible when the pipe is cooled, the water in the cooling water tank is circulated by a water pump 5. Figure 1 、 Figure 2 and Figure 3The inner walls on both sides of the water permeable tank 5 are respectively embedded with a semiconductor refrigerating sheet 10 for refrigeration / heat and a sensing unit 11 for sensing temperature, the sensing unit 11 is specifically a thermistor, and the semiconductor refrigerating sheet 10 and the sensing unit 11 are both located on the same guide plate 4. A control unit 12 is arranged on the outer wall of the cooling water tank, and the semiconductor refrigerating sheet 10 and the sensing unit 11 are both electrically connected with the control unit 12, the control unit 12 controls the water temperature through the semiconductor refrigerating sheet 10, so that the water temperature reaches the set range, while the sensing unit 11 can monitor the current water temperature and feed back the water temperature signal to the control unit 12, forming a closed loop control.
[0027] Due to the influence of water quality or surface impurities of pipe material, dirt is easily attached to the sensing unit 11 and the semiconductor refrigerating sheet 10, therefore, referring to Figure 1 、 Figure 2 and Figure 3 , the two sides of the insertion strip 6 of the other guide plate 4 are provided with soft hair brushes 13 for cleaning, when the insertion strip 6 is inserted into the water permeable tank 5, the two guide plates 4 are driven by the driving mechanism 7 to move along the diagonal line of the guide cylinder towards each other / away from each other, so that the soft hair brushes 13 can scrape the dirt attached to the sensing unit 11 and the semiconductor refrigerating sheet 10, ensuring that the sensing unit 11 and the semiconductor refrigerating sheet 10 can work normally.
[0028] The application provides a preparation method of an HDPE direct drinking water pipe with self-cleaning and antibacterial functions, which adopts the following technical scheme: S1, raw material mixing, adding a nano-level antibacterial agent in the plastic particles of ultra-high molecular weight polyethylene and uniformly mixing to form the extrusion raw material of the inner layer of the direct drinking water pipe; uniformly mixing ethylene-vinyl alcohol copolymer to form the extrusion raw material of the middle layer of the direct drinking water pipe; uniformly mixing heat-resistant polyethylene to form the extrusion raw material of the outer layer of the direct drinking water pipe; S2, hot pipe blank extrusion molding, after the three kinds of mixed raw materials are melted and plasticized by the extrusion molding mechanism 1 in the three-layer co-extrusion pipe material extruder, the hot pipe blank is extruded to form a hot pipe blank, the hot pipe blank is preliminarily shaped by a vacuum sizing sleeve, and then enters a cooling water tank for sufficient cooling to room temperature, and the pipe material after cooling and shaping is uniformly pulled by a traction machine; S3, hot pipe blank shaping, the hot pipe blank is preliminarily shaped by a vacuum sizing sleeve, and then enters a cooling water tank and passes through a guide cylinder, the hot pipe blank is sufficiently cooled to room temperature in the cooling water tank to form a direct drinking water pipe; S4, direct drinking water pipe packaging, the traction mechanism 3 pulls the direct drinking water pipe after cooling and shaping to move away from the cooling water tank, and the direct drinking water pipe is wound and packaged by a coiling machine.
[0029] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.
Claims
1. A manufacturing apparatus for HDPE direct drinking water pipes with self-cleaning and antibacterial function, comprising an extrusion molding mechanism (1), a shaping and cooling mechanism (2), and a traction mechanism (3) arranged sequentially, characterized in that, The cooling mechanism (2) includes a cooling water tank and a water circulation system for continuously supplying circulating cooling water to the cooling water tank. A guide cylinder is provided in the cooling water tank to limit the swaying of the pipe. The length direction of the guide cylinder is consistent with the length direction of the cooling tank. The pipe slides through the guide cylinder. A water permeable groove (5) is provided through the guide cylinder.
2. The equipment for preparing HDPE direct drinking water pipes with self-cleaning and antibacterial function according to claim 1, characterized in that, The cross-section of the guide cylinder is set to square. The guide cylinder includes two L-shaped guide plates (4). Multiple permeable grooves (5) are provided and are spaced along the length direction of the guide plate (4) on the side plates on both sides of the guide plate (4), so that the edges of the side plates on both sides of the guide plate (4) are serrated.
3. The equipment for preparing HDPE direct drinking water pipes with self-cleaning and antibacterial function according to claim 2, characterized in that, The part of the side plate of the guide plate (4) between the two permeable grooves (5) is a strip (6). The two guide plates (4) are fastened together so that multiple strips (6) are inserted into multiple permeable grooves (5) respectively. The cooling water tank is provided with a drive mechanism (7) for driving the two guide plates (4) to move along the diagonal of the guide cylinder in a direction that moves closer to or further away from each other.
4. The equipment for preparing HDPE direct drinking water pipes with self-cleaning and antibacterial function according to claim 3, characterized in that, The drive mechanism (7) is provided in two sets, each corresponding to one of the two guide plates (4). The drive mechanism (7) includes a square rod (71) fixedly connected to the guide plate (4), a square tube (72) fixed in the cooling water tank, and a drive assembly (73) that drives the square rod (71) to move along the diagonal direction of the guide tube. The square rod (71) slides through the square tube (72).
5. The equipment for preparing a self-cleaning and antibacterial HDPE direct drinking water pipe according to claim 4, characterized in that, The drive assembly (73) includes a threaded cylinder (731) that is installed through the side wall of the cooling water tank and a threaded rod (732) that is threaded at one end inside the threaded cylinder (731). The end of the square rod (71) away from the guide plate (4) extends into the threaded cylinder (731) and is rotatably connected to the end of the threaded rod (732). A sealing ring (8) is installed between the threaded cylinder (731) and the square rod (71).
6. The equipment for preparing HDPE direct drinking water pipes with self-cleaning and antibacterial function according to claim 5, characterized in that, The threaded rod (732) has multiple scale lines (9) along its length.
7. The equipment for preparing HDPE direct drinking water pipes with self-cleaning and antibacterial function according to claim 2, characterized in that, The inner wall of the permeable tank (5) is embedded with a semiconductor cooling chip (10) for cooling / heating and a sensing unit (11) for sensing temperature. A control unit (12) is provided on the outer wall of the cooling water tank. The semiconductor cooling chip (10) and the sensing unit (11) are both electrically connected to the control unit (12).
8. The equipment for preparing HDPE direct drinking water pipes with self-cleaning and antibacterial function according to claim 7, characterized in that, The semiconductor cooling chip (10) and the sensing unit (11) are both located on the same guide plate (4), and soft brushes (13) for cleaning are provided on both sides of the insert (6) of the other guide plate (4).
9. A method for preparing an HDPE direct drinking water pipe with self-cleaning and antibacterial function, based on the equipment for preparing an HDPE direct drinking water pipe with self-cleaning and antibacterial function as described in any one of claims 1-8, characterized in that, Includes the following steps, S1, Raw material mixing: Nanoscale antibacterial agent is added to ultra-high molecular weight polyethylene plastic particles and mixed evenly to form the extrusion raw material for the inner layer of the direct drinking water pipe; ethylene-vinyl alcohol copolymer is mixed evenly to form the extrusion raw material for the middle layer of the direct drinking water pipe; heat-resistant polyethylene is mixed evenly to form the extrusion raw material for the outer layer of the direct drinking water pipe. S2, hot pipe blank extrusion molding, the three mixed raw materials are melted and plasticized by the extrusion molding mechanism (1) in the three-layer co-extrusion pipe extruder and then extruded to form a hot pipe blank. The hot pipe blank is initially shaped by the vacuum sizing sleeve, and then fully cooled to room temperature in the cooling water tank. The cooled and shaped pipe is pulled at a constant speed by the traction machine. S3, heat pipe blank shaping: The heat pipe blank is initially shaped by a vacuum sizing sleeve, then enters the cooling water tank and passes through the guide cylinder. The heat pipe blank is fully cooled to room temperature in the cooling water tank to form a direct drinking water pipe. S4, Direct drinking water pipe packaging, traction mechanism (3) traction the cooled and formed direct drinking water pipe to move away from the cooling water tank, and the direct drinking water pipe is wound and packaged by the coiling machine.